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-rw-r--r--arch/x86/kernel/Makefile8
-rw-r--r--arch/x86/kernel/acpi/boot.c4
-rw-r--r--arch/x86/kernel/apic.c (renamed from arch/x86/kernel/apic_32.c)627
-rw-r--r--arch/x86/kernel/apic_64.c1848
-rw-r--r--arch/x86/kernel/bios_uv.c137
-rw-r--r--arch/x86/kernel/cpu/amd.c2
-rw-r--r--arch/x86/kernel/cpu/intel.c2
-rw-r--r--arch/x86/kernel/efi.c4
-rw-r--r--arch/x86/kernel/entry_32.S2
-rw-r--r--arch/x86/kernel/genapic_flat_64.c4
-rw-r--r--arch/x86/kernel/genx2apic_uv_x.c49
-rw-r--r--arch/x86/kernel/hpet.c453
-rw-r--r--arch/x86/kernel/io_apic.c (renamed from arch/x86/kernel/io_apic_64.c)1538
-rw-r--r--arch/x86/kernel/io_apic_32.c2908
-rw-r--r--arch/x86/kernel/irq.c189
-rw-r--r--arch/x86/kernel/irq_32.c194
-rw-r--r--arch/x86/kernel/irq_64.c169
-rw-r--r--arch/x86/kernel/irqinit_32.c47
-rw-r--r--arch/x86/kernel/irqinit_64.c28
-rw-r--r--arch/x86/kernel/quirks.c3
-rw-r--r--arch/x86/kernel/setup.c4
-rw-r--r--arch/x86/kernel/setup_percpu.c17
-rw-r--r--arch/x86/kernel/smpboot.c6
-rw-r--r--arch/x86/kernel/uv_irq.c79
-rw-r--r--arch/x86/kernel/uv_sysfs.c72
-rw-r--r--arch/x86/kernel/visws_quirks.c32
-rw-r--r--arch/x86/kernel/vmiclock_32.c3
27 files changed, 2792 insertions, 5637 deletions
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 0d41f0343dc..d7e5a58ee22 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -23,7 +23,7 @@ CFLAGS_hpet.o := $(nostackp)
CFLAGS_tsc.o := $(nostackp)
obj-y := process_$(BITS).o signal_$(BITS).o entry_$(BITS).o
-obj-y += traps.o irq_$(BITS).o dumpstack_$(BITS).o
+obj-y += traps.o irq.o irq_$(BITS).o dumpstack_$(BITS).o
obj-y += time_$(BITS).o ioport.o ldt.o
obj-y += setup.o i8259.o irqinit_$(BITS).o setup_percpu.o
obj-$(CONFIG_X86_VISWS) += visws_quirks.o
@@ -60,8 +60,8 @@ obj-$(CONFIG_X86_32_SMP) += smpcommon.o
obj-$(CONFIG_X86_64_SMP) += tsc_sync.o smpcommon.o
obj-$(CONFIG_X86_TRAMPOLINE) += trampoline_$(BITS).o
obj-$(CONFIG_X86_MPPARSE) += mpparse.o
-obj-$(CONFIG_X86_LOCAL_APIC) += apic_$(BITS).o nmi.o
-obj-$(CONFIG_X86_IO_APIC) += io_apic_$(BITS).o
+obj-$(CONFIG_X86_LOCAL_APIC) += apic.o nmi.o
+obj-$(CONFIG_X86_IO_APIC) += io_apic.o
obj-$(CONFIG_X86_REBOOTFIXUPS) += reboot_fixups_32.o
obj-$(CONFIG_DYNAMIC_FTRACE) += ftrace.o
obj-$(CONFIG_KEXEC) += machine_kexec_$(BITS).o
@@ -108,7 +108,7 @@ obj-$(CONFIG_MICROCODE) += microcode.o
# 64 bit specific files
ifeq ($(CONFIG_X86_64),y)
obj-y += genapic_64.o genapic_flat_64.o genx2apic_uv_x.o tlb_uv.o
- obj-y += bios_uv.o
+ obj-y += bios_uv.o uv_irq.o uv_sysfs.o
obj-y += genx2apic_cluster.o
obj-y += genx2apic_phys.o
obj-$(CONFIG_X86_PM_TIMER) += pmtimer_64.o
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index eb875cdc736..0d1c26a583c 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -1256,7 +1256,7 @@ static int __init acpi_parse_madt_ioapic_entries(void)
count =
acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
- NR_IRQ_VECTORS);
+ nr_irqs);
if (count < 0) {
printk(KERN_ERR PREFIX
"Error parsing interrupt source overrides entry\n");
@@ -1276,7 +1276,7 @@ static int __init acpi_parse_madt_ioapic_entries(void)
count =
acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
- NR_IRQ_VECTORS);
+ nr_irqs);
if (count < 0) {
printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
/* TBD: Cleanup to allow fallback to MPS */
diff --git a/arch/x86/kernel/apic_32.c b/arch/x86/kernel/apic.c
index 21c831d96af..04a7f960bbc 100644
--- a/arch/x86/kernel/apic_32.c
+++ b/arch/x86/kernel/apic.c
@@ -23,11 +23,13 @@
#include <linux/mc146818rtc.h>
#include <linux/kernel_stat.h>
#include <linux/sysdev.h>
+#include <linux/ioport.h>
#include <linux/cpu.h>
#include <linux/clockchips.h>
#include <linux/acpi_pmtmr.h>
#include <linux/module.h>
#include <linux/dmi.h>
+#include <linux/dmar.h>
#include <asm/atomic.h>
#include <asm/smp.h>
@@ -36,8 +38,14 @@
#include <asm/desc.h>
#include <asm/arch_hooks.h>
#include <asm/hpet.h>
+#include <asm/pgalloc.h>
#include <asm/i8253.h>
#include <asm/nmi.h>
+#include <asm/idle.h>
+#include <asm/proto.h>
+#include <asm/timex.h>
+#include <asm/apic.h>
+#include <asm/i8259.h>
#include <mach_apic.h>
#include <mach_apicdef.h>
@@ -50,16 +58,58 @@
# error SPURIOUS_APIC_VECTOR definition error
#endif
-unsigned long mp_lapic_addr;
-
+#ifdef CONFIG_X86_32
/*
* Knob to control our willingness to enable the local APIC.
*
* +1=force-enable
*/
static int force_enable_local_apic;
-int disable_apic;
+/*
+ * APIC command line parameters
+ */
+static int __init parse_lapic(char *arg)
+{
+ force_enable_local_apic = 1;
+ return 0;
+}
+early_param("lapic", parse_lapic);
+/* Local APIC was disabled by the BIOS and enabled by the kernel */
+static int enabled_via_apicbase;
+
+#endif
+
+#ifdef CONFIG_X86_64
+static int apic_calibrate_pmtmr __initdata;
+static __init int setup_apicpmtimer(char *s)
+{
+ apic_calibrate_pmtmr = 1;
+ notsc_setup(NULL);
+ return 0;
+}
+__setup("apicpmtimer", setup_apicpmtimer);
+#endif
+
+#ifdef CONFIG_X86_64
+#define HAVE_X2APIC
+#endif
+
+#ifdef HAVE_X2APIC
+int x2apic;
+/* x2apic enabled before OS handover */
+int x2apic_preenabled;
+int disable_x2apic;
+static __init int setup_nox2apic(char *str)
+{
+ disable_x2apic = 1;
+ setup_clear_cpu_cap(X86_FEATURE_X2APIC);
+ return 0;
+}
+early_param("nox2apic", setup_nox2apic);
+#endif
+unsigned long mp_lapic_addr;
+int disable_apic;
/* Disable local APIC timer from the kernel commandline or via dmi quirk */
static int disable_apic_timer __cpuinitdata;
/* Local APIC timer works in C2 */
@@ -110,9 +160,6 @@ static struct clock_event_device lapic_clockevent = {
};
static DEFINE_PER_CPU(struct clock_event_device, lapic_events);
-/* Local APIC was disabled by the BIOS and enabled by the kernel */
-static int enabled_via_apicbase;
-
static unsigned long apic_phys;
/*
@@ -202,6 +249,42 @@ static struct apic_ops xapic_ops = {
struct apic_ops __read_mostly *apic_ops = &xapic_ops;
EXPORT_SYMBOL_GPL(apic_ops);
+#ifdef HAVE_X2APIC
+static void x2apic_wait_icr_idle(void)
+{
+ /* no need to wait for icr idle in x2apic */
+ return;
+}
+
+static u32 safe_x2apic_wait_icr_idle(void)
+{
+ /* no need to wait for icr idle in x2apic */
+ return 0;
+}
+
+void x2apic_icr_write(u32 low, u32 id)
+{
+ wrmsrl(APIC_BASE_MSR + (APIC_ICR >> 4), ((__u64) id) << 32 | low);
+}
+
+u64 x2apic_icr_read(void)
+{
+ unsigned long val;
+
+ rdmsrl(APIC_BASE_MSR + (APIC_ICR >> 4), val);
+ return val;
+}
+
+static struct apic_ops x2apic_ops = {
+ .read = native_apic_msr_read,
+ .write = native_apic_msr_write,
+ .icr_read = x2apic_icr_read,
+ .icr_write = x2apic_icr_write,
+ .wait_icr_idle = x2apic_wait_icr_idle,
+ .safe_wait_icr_idle = safe_x2apic_wait_icr_idle,
+};
+#endif
+
/**
* enable_NMI_through_LVT0 - enable NMI through local vector table 0
*/
@@ -219,6 +302,7 @@ void __cpuinit enable_NMI_through_LVT0(void)
apic_write(APIC_LVT0, v);
}
+#ifdef CONFIG_X86_32
/**
* get_physical_broadcast - Get number of physical broadcast IDs
*/
@@ -226,6 +310,7 @@ int get_physical_broadcast(void)
{
return modern_apic() ? 0xff : 0xf;
}
+#endif
/**
* lapic_get_maxlvt - get the maximum number of local vector table entries
@@ -247,11 +332,7 @@ int lapic_get_maxlvt(void)
*/
/* Clock divisor */
-#ifdef CONFG_X86_64
-#define APIC_DIVISOR 1
-#else
#define APIC_DIVISOR 16
-#endif
/*
* This function sets up the local APIC timer, with a timeout of
@@ -383,7 +464,7 @@ static void lapic_timer_broadcast(cpumask_t mask)
* Setup the local APIC timer for this CPU. Copy the initilized values
* of the boot CPU and register the clock event in the framework.
*/
-static void __devinit setup_APIC_timer(void)
+static void __cpuinit setup_APIC_timer(void)
{
struct clock_event_device *levt = &__get_cpu_var(lapic_events);
@@ -453,14 +534,51 @@ static void __init lapic_cal_handler(struct clock_event_device *dev)
}
}
+static int __init calibrate_by_pmtimer(long deltapm, long *delta)
+{
+ const long pm_100ms = PMTMR_TICKS_PER_SEC / 10;
+ const long pm_thresh = pm_100ms / 100;
+ unsigned long mult;
+ u64 res;
+
+#ifndef CONFIG_X86_PM_TIMER
+ return -1;
+#endif
+
+ apic_printk(APIC_VERBOSE, "... PM timer delta = %ld\n", deltapm);
+
+ /* Check, if the PM timer is available */
+ if (!deltapm)
+ return -1;
+
+ mult = clocksource_hz2mult(PMTMR_TICKS_PER_SEC, 22);
+
+ if (deltapm > (pm_100ms - pm_thresh) &&
+ deltapm < (pm_100ms + pm_thresh)) {
+ apic_printk(APIC_VERBOSE, "... PM timer result ok\n");
+ } else {
+ res = (((u64)deltapm) * mult) >> 22;
+ do_div(res, 1000000);
+ printk(KERN_WARNING "APIC calibration not consistent "
+ "with PM Timer: %ldms instead of 100ms\n",
+ (long)res);
+ /* Correct the lapic counter value */
+ res = (((u64)(*delta)) * pm_100ms);
+ do_div(res, deltapm);
+ printk(KERN_INFO "APIC delta adjusted to PM-Timer: "
+ "%lu (%ld)\n", (unsigned long)res, *delta);
+ *delta = (long)res;
+ }
+
+ return 0;
+}
+
static int __init calibrate_APIC_clock(void)
{
struct clock_event_device *levt = &__get_cpu_var(lapic_events);
- const long pm_100ms = PMTMR_TICKS_PER_SEC/10;
- const long pm_thresh = pm_100ms/100;
void (*real_handler)(struct clock_event_device *dev);
unsigned long deltaj;
- long delta, deltapm;
+ long delta;
int pm_referenced = 0;
local_irq_disable();
@@ -470,10 +588,10 @@ static int __init calibrate_APIC_clock(void)
global_clock_event->event_handler = lapic_cal_handler;
/*
- * Setup the APIC counter to 1e9. There is no way the lapic
+ * Setup the APIC counter to maximum. There is no way the lapic
* can underflow in the 100ms detection time frame
*/
- __setup_APIC_LVTT(1000000000, 0, 0);
+ __setup_APIC_LVTT(0xffffffff, 0, 0);
/* Let the interrupts run */
local_irq_enable();
@@ -490,34 +608,9 @@ static int __init calibrate_APIC_clock(void)
delta = lapic_cal_t1 - lapic_cal_t2;
apic_printk(APIC_VERBOSE, "... lapic delta = %ld\n", delta);
- /* Check, if the PM timer is available */
- deltapm = lapic_cal_pm2 - lapic_cal_pm1;
- apic_printk(APIC_VERBOSE, "... PM timer delta = %ld\n", deltapm);
-
- if (deltapm) {
- unsigned long mult;
- u64 res;
-
- mult = clocksource_hz2mult(PMTMR_TICKS_PER_SEC, 22);
-
- if (deltapm > (pm_100ms - pm_thresh) &&
- deltapm < (pm_100ms + pm_thresh)) {
- apic_printk(APIC_VERBOSE, "... PM timer result ok\n");
- } else {
- res = (((u64) deltapm) * mult) >> 22;
- do_div(res, 1000000);
- printk(KERN_WARNING "APIC calibration not consistent "
- "with PM Timer: %ldms instead of 100ms\n",
- (long)res);
- /* Correct the lapic counter value */
- res = (((u64) delta) * pm_100ms);
- do_div(res, deltapm);
- printk(KERN_INFO "APIC delta adjusted to PM-Timer: "
- "%lu (%ld)\n", (unsigned long) res, delta);
- delta = (long) res;
- }
- pm_referenced = 1;
- }
+ /* we trust the PM based calibration if possible */
+ pm_referenced = !calibrate_by_pmtimer(lapic_cal_pm2 - lapic_cal_pm1,
+ &delta);
/* Calculate the scaled math multiplication factor */
lapic_clockevent.mult = div_sc(delta, TICK_NSEC * LAPIC_CAL_LOOPS,
@@ -559,7 +652,10 @@ static int __init calibrate_APIC_clock(void)
levt->features &= ~CLOCK_EVT_FEAT_DUMMY;
- /* We trust the pm timer based calibration */
+ /*
+ * PM timer calibration failed or not turned on
+ * so lets try APIC timer based calibration
+ */
if (!pm_referenced) {
apic_printk(APIC_VERBOSE, "... verify APIC timer\n");
@@ -652,7 +748,7 @@ void __init setup_boot_APIC_clock(void)
setup_APIC_timer();
}
-void __devinit setup_secondary_APIC_clock(void)
+void __cpuinit setup_secondary_APIC_clock(void)
{
setup_APIC_timer();
}
@@ -718,6 +814,9 @@ void smp_apic_timer_interrupt(struct pt_regs *regs)
* Besides, if we don't timer interrupts ignore the global
* interrupt lock, which is the WrongThing (tm) to do.
*/
+#ifdef CONFIG_X86_64
+ exit_idle();
+#endif
irq_enter();
local_apic_timer_interrupt();
irq_exit();
@@ -991,40 +1090,43 @@ void __init init_bsp_APIC(void)
static void __cpuinit lapic_setup_esr(void)
{
- unsigned long oldvalue, value, maxlvt;
- if (lapic_is_integrated() && !esr_disable) {
- if (esr_disable) {
- /*
- * Something untraceable is creating bad interrupts on
- * secondary quads ... for the moment, just leave the
- * ESR disabled - we can't do anything useful with the
- * errors anyway - mbligh
- */
- printk(KERN_INFO "Leaving ESR disabled.\n");
- return;
- }
- /* !82489DX */
- maxlvt = lapic_get_maxlvt();
- if (maxlvt > 3) /* Due to the Pentium erratum 3AP. */
- apic_write(APIC_ESR, 0);
- oldvalue = apic_read(APIC_ESR);
+ unsigned int oldvalue, value, maxlvt;
+
+ if (!lapic_is_integrated()) {
+ printk(KERN_INFO "No ESR for 82489DX.\n");
+ return;
+ }
- /* enables sending errors */
- value = ERROR_APIC_VECTOR;
- apic_write(APIC_LVTERR, value);
+ if (esr_disable) {
/*
- * spec says clear errors after enabling vector.
+ * Something untraceable is creating bad interrupts on
+ * secondary quads ... for the moment, just leave the
+ * ESR disabled - we can't do anything useful with the
+ * errors anyway - mbligh
*/
- if (maxlvt > 3)
- apic_write(APIC_ESR, 0);
- value = apic_read(APIC_ESR);
- if (value != oldvalue)
- apic_printk(APIC_VERBOSE, "ESR value before enabling "
- "vector: 0x%08lx after: 0x%08lx\n",
- oldvalue, value);
- } else {
- printk(KERN_INFO "No ESR for 82489DX.\n");
+ printk(KERN_INFO "Leaving ESR disabled.\n");
+ return;
}
+
+ maxlvt = lapic_get_maxlvt();
+ if (maxlvt > 3) /* Due to the Pentium erratum 3AP. */
+ apic_write(APIC_ESR, 0);
+ oldvalue = apic_read(APIC_ESR);
+
+ /* enables sending errors */
+ value = ERROR_APIC_VECTOR;
+ apic_write(APIC_LVTERR, value);
+
+ /*
+ * spec says clear errors after enabling vector.
+ */
+ if (maxlvt > 3)
+ apic_write(APIC_ESR, 0);
+ value = apic_read(APIC_ESR);
+ if (value != oldvalue)
+ apic_printk(APIC_VERBOSE, "ESR value before enabling "
+ "vector: 0x%08x after: 0x%08x\n",
+ oldvalue, value);
}
@@ -1033,24 +1135,27 @@ static void __cpuinit lapic_setup_esr(void)
*/
void __cpuinit setup_local_APIC(void)
{
- unsigned long value, integrated;
+ unsigned int value;
int i, j;
+#ifdef CONFIG_X86_32
/* Pound the ESR really hard over the head with a big hammer - mbligh */
- if (esr_disable) {
+ if (lapic_is_integrated() && esr_disable) {
apic_write(APIC_ESR, 0);
apic_write(APIC_ESR, 0);
apic_write(APIC_ESR, 0);
apic_write(APIC_ESR, 0);
}
+#endif
- integrated = lapic_is_integrated();
+ preempt_disable();
/*
* Double-check whether this APIC is really registered.
+ * This is meaningless in clustered apic mode, so we skip it.
*/
if (!apic_id_registered())
- WARN_ON_ONCE(1);
+ BUG();
/*
* Intel recommends to set DFR, LDR and TPR before enabling
@@ -1096,6 +1201,7 @@ void __cpuinit setup_local_APIC(void)
*/
value |= APIC_SPIV_APIC_ENABLED;
+#ifdef CONFIG_X86_32
/*
* Some unknown Intel IO/APIC (or APIC) errata is biting us with
* certain networking cards. If high frequency interrupts are
@@ -1116,8 +1222,13 @@ void __cpuinit setup_local_APIC(void)
* See also the comment in end_level_ioapic_irq(). --macro
*/
- /* Enable focus processor (bit==0) */
+ /*
+ * - enable focus processor (bit==0)
+ * - 64bit mode always use processor focus
+ * so no need to set it
+ */
value &= ~APIC_SPIV_FOCUS_DISABLED;
+#endif
/*
* Set spurious IRQ vector
@@ -1154,9 +1265,11 @@ void __cpuinit setup_local_APIC(void)
value = APIC_DM_NMI;
else
value = APIC_DM_NMI | APIC_LVT_MASKED;
- if (!integrated) /* 82489DX */
+ if (!lapic_is_integrated()) /* 82489DX */
value |= APIC_LVT_LEVEL_TRIGGER;
apic_write(APIC_LVT1, value);
+
+ preempt_enable();
}
void __cpuinit end_local_APIC_setup(void)
@@ -1177,6 +1290,153 @@ void __cpuinit end_local_APIC_setup(void)
apic_pm_activate();
}
+#ifdef HAVE_X2APIC
+void check_x2apic(void)
+{
+ int msr, msr2;
+
+ rdmsr(MSR_IA32_APICBASE, msr, msr2);
+
+ if (msr & X2APIC_ENABLE) {
+ printk("x2apic enabled by BIOS, switching to x2apic ops\n");
+ x2apic_preenabled = x2apic = 1;
+ apic_ops = &x2apic_ops;
+ }
+}
+
+void enable_x2apic(void)
+{
+ int msr, msr2;
+
+ rdmsr(MSR_IA32_APICBASE, msr, msr2);
+ if (!(msr & X2APIC_ENABLE)) {
+ printk("Enabling x2apic\n");
+ wrmsr(MSR_IA32_APICBASE, msr | X2APIC_ENABLE, 0);
+ }
+}
+
+void enable_IR_x2apic(void)
+{
+#ifdef CONFIG_INTR_REMAP
+ int ret;
+ unsigned long flags;
+
+ if (!cpu_has_x2apic)
+ return;
+
+ if (!x2apic_preenabled && disable_x2apic) {
+ printk(KERN_INFO
+ "Skipped enabling x2apic and Interrupt-remapping "
+ "because of nox2apic\n");
+ return;
+ }
+
+ if (x2apic_preenabled && disable_x2apic)
+ panic("Bios already enabled x2apic, can't enforce nox2apic");
+
+ if (!x2apic_preenabled && skip_ioapic_setup) {
+ printk(KERN_INFO
+ "Skipped enabling x2apic and Interrupt-remapping "
+ "because of skipping io-apic setup\n");
+ return;
+ }
+
+ ret = dmar_table_init();
+ if (ret) {
+ printk(KERN_INFO
+ "dmar_table_init() failed with %d:\n", ret);
+
+ if (x2apic_preenabled)
+ panic("x2apic enabled by bios. But IR enabling failed");
+ else
+ printk(KERN_INFO
+ "Not enabling x2apic,Intr-remapping\n");
+ return;
+ }
+
+ local_irq_save(flags);
+ mask_8259A();
+
+ ret = save_mask_IO_APIC_setup();
+ if (ret) {
+ printk(KERN_INFO "Saving IO-APIC state failed: %d\n", ret);
+ goto end;
+ }
+
+ ret = enable_intr_remapping(1);
+
+ if (ret && x2apic_preenabled) {
+ local_irq_restore(flags);
+ panic("x2apic enabled by bios. But IR enabling failed");
+ }
+
+ if (ret)
+ goto end_restore;
+
+ if (!x2apic) {
+ x2apic = 1;
+ apic_ops = &x2apic_ops;
+ enable_x2apic();
+ }
+
+end_restore:
+ if (ret)
+ /*
+ * IR enabling failed
+ */
+ restore_IO_APIC_setup();
+ else
+ reinit_intr_remapped_IO_APIC(x2apic_preenabled);
+
+end:
+ unmask_8259A();
+ local_irq_restore(flags);
+
+ if (!ret) {
+ if (!x2apic_preenabled)
+ printk(KERN_INFO
+ "Enabled x2apic and interrupt-remapping\n");
+ else
+ printk(KERN_INFO
+ "Enabled Interrupt-remapping\n");
+ } else
+ printk(KERN_ERR
+ "Failed to enable Interrupt-remapping and x2apic\n");
+#else
+ if (!cpu_has_x2apic)
+ return;
+
+ if (x2apic_preenabled)
+ panic("x2apic enabled prior OS handover,"
+ " enable CONFIG_INTR_REMAP");
+
+ printk(KERN_INFO "Enable CONFIG_INTR_REMAP for enabling intr-remapping "
+ " and x2apic\n");
+#endif
+
+ return;
+}
+#endif /* HAVE_X2APIC */
+
+#ifdef CONFIG_X86_64
+/*
+ * Detect and enable local APICs on non-SMP boards.
+ * Original code written by Keir Fraser.
+ * On AMD64 we trust the BIOS - if it says no APIC it is likely
+ * not correctly set up (usually the APIC timer won't work etc.)
+ */
+static int __init detect_init_APIC(void)
+{
+ if (!cpu_has_apic) {
+ printk(KERN_INFO "No local APIC present\n");
+ return -1;
+ }
+
+ mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
+ boot_cpu_physical_apicid = 0;
+ return 0;
+}
+#else
/*
* Detect and initialize APIC
*/
@@ -1255,12 +1515,46 @@ no_apic:
printk(KERN_INFO "No local APIC present or hardware disabled\n");
return -1;
}
+#endif
+
+#ifdef CONFIG_X86_64
+void __init early_init_lapic_mapping(void)
+{
+ unsigned long phys_addr;
+
+ /*
+ * If no local APIC can be found then go out
+ * : it means there is no mpatable and MADT
+ */
+ if (!smp_found_config)
+ return;
+
+ phys_addr = mp_lapic_addr;
+
+ set_fixmap_nocache(FIX_APIC_BASE, phys_addr);
+ apic_printk(APIC_VERBOSE, "mapped APIC to %16lx (%16lx)\n",
+ APIC_BASE, phys_addr);
+
+ /*
+ * Fetch the APIC ID of the BSP in case we have a
+ * default configuration (or the MP table is broken).
+ */
+ boot_cpu_physical_apicid = read_apic_id();
+}
+#endif
/**
* init_apic_mappings - initialize APIC mappings
*/
void __init init_apic_mappings(void)
{
+#ifdef HAVE_X2APIC
+ if (x2apic) {
+ boot_cpu_physical_apicid = read_apic_id();
+ return;
+ }
+#endif
+
/*
* If no local APIC can be found then set up a fake all
* zeroes page to simulate the local APIC and another
@@ -1273,8 +1567,8 @@ void __init init_apic_mappings(void)
apic_phys = mp_lapic_addr;
set_fixmap_nocache(FIX_APIC_BASE, apic_phys);
- printk(KERN_DEBUG "mapped APIC to %08lx (%08lx)\n", APIC_BASE,
- apic_phys);
+ apic_printk(APIC_VERBOSE, "mapped APIC to %08lx (%08lx)\n",
+ APIC_BASE, apic_phys);
/*
* Fetch the APIC ID of the BSP in case we have a
@@ -1282,18 +1576,27 @@ void __init init_apic_mappings(void)
*/
if (boot_cpu_physical_apicid == -1U)
boot_cpu_physical_apicid = read_apic_id();
-
}
/*
* This initializes the IO-APIC and APIC hardware if this is
* a UP kernel.
*/
-
int apic_version[MAX_APICS];
int __init APIC_init_uniprocessor(void)
{
+#ifdef CONFIG_X86_64
+ if (disable_apic) {
+ printk(KERN_INFO "Apic disabled\n");
+ return -1;
+ }
+ if (!cpu_has_apic) {
+ disable_apic = 1;
+ printk(KERN_INFO "Apic disabled by BIOS\n");
+ return -1;
+ }
+#else
if (!smp_found_config && !cpu_has_apic)
return -1;
@@ -1302,39 +1605,68 @@ int __init APIC_init_uniprocessor(void)
*/
if (!cpu_has_apic &&
APIC_INTEGRATED(apic_version[boot_cpu_physical_apicid])) {
- printk(KERN_ERR "BIOS bug, local APIC #%d not detected!...\n",
+ printk(KERN_ERR "BIOS bug, local APIC 0x%x not detected!...\n",
boot_cpu_physical_apicid);
clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC);
return -1;
}
+#endif
- verify_local_APIC();
+#ifdef HAVE_X2APIC
+ enable_IR_x2apic();
+#endif
+#ifdef CONFIG_X86_64
+ setup_apic_routing();
+#endif
+ verify_local_APIC();
connect_bsp_APIC();
+#ifdef CONFIG_X86_64
+ apic_write(APIC_ID, SET_APIC_ID(boot_cpu_physical_apicid));
+#else
/*
* Hack: In case of kdump, after a crash, kernel might be booting
* on a cpu with non-zero lapic id. But boot_cpu_physical_apicid
* might be zero if read from MP tables. Get it from LAPIC.
*/
-#ifdef CONFIG_CRASH_DUMP
+# ifdef CONFIG_CRASH_DUMP
boot_cpu_physical_apicid = read_apic_id();
+# endif
#endif
physid_set_mask_of_physid(boot_cpu_physical_apicid, &phys_cpu_present_map);
-
setup_local_APIC();
+#ifdef CONFIG_X86_64
+ /*
+ * Now enable IO-APICs, actually call clear_IO_APIC
+ * We need clear_IO_APIC before enabling vector on BP
+ */
+ if (!skip_ioapic_setup && nr_ioapics)
+ enable_IO_APIC();
+#endif
+
#ifdef CONFIG_X86_IO_APIC
if (!smp_found_config || skip_ioapic_setup || !nr_ioapics)
#endif
localise_nmi_watchdog();
end_local_APIC_setup();
+
#ifdef CONFIG_X86_IO_APIC
- if (smp_found_config)
- if (!skip_ioapic_setup && nr_ioapics)
- setup_IO_APIC();
+ if (smp_found_config && !skip_ioapic_setup && nr_ioapics)
+ setup_IO_APIC();
+# ifdef CONFIG_X86_64
+ else
+ nr_ioapics = 0;
+# endif
#endif
+
+#ifdef CONFIG_X86_64
+ setup_boot_APIC_clock();
+ check_nmi_watchdog();
+#else
setup_boot_clock();
+#endif
return 0;
}
@@ -1348,8 +1680,11 @@ int __init APIC_init_uniprocessor(void)
*/
void smp_spurious_interrupt(struct pt_regs *regs)
{
- unsigned long v;
+ u32 v;
+#ifdef CONFIG_X86_64
+ exit_idle();
+#endif
irq_enter();
/*
* Check if this really is a spurious interrupt and ACK it
@@ -1360,10 +1695,14 @@ void smp_spurious_interrupt(struct pt_regs *regs)
if (v & (1 << (SPURIOUS_APIC_VECTOR & 0x1f)))
ack_APIC_irq();
+#ifdef CONFIG_X86_64
+ add_pda(irq_spurious_count, 1);
+#else
/* see sw-dev-man vol 3, chapter 7.4.13.5 */
printk(KERN_INFO "spurious APIC interrupt on CPU#%d, "
"should never happen.\n", smp_processor_id());
__get_cpu_var(irq_stat).irq_spurious_count++;
+#endif
irq_exit();
}
@@ -1372,8 +1711,11 @@ void smp_spurious_interrupt(struct pt_regs *regs)
*/
void smp_error_interrupt(struct pt_regs *regs)
{
- unsigned long v, v1;
+ u32 v, v1;
+#ifdef CONFIG_X86_64
+ exit_idle();
+#endif
irq_enter();
/* First tickle the hardware, only then report what went on. -- REW */
v = apic_read(APIC_ESR);
@@ -1392,7 +1734,7 @@ void smp_error_interrupt(struct pt_regs *regs)
6: Received illegal vector
7: Illegal register address
*/
- printk(KERN_DEBUG "APIC error on CPU%d: %02lx(%02lx)\n",
+ printk(KERN_DEBUG "APIC error on CPU%d: %02x(%02x)\n",
smp_processor_id(), v , v1);
irq_exit();
}
@@ -1565,6 +1907,13 @@ void __cpuinit generic_processor_info(int apicid, int version)
cpu_set(cpu, cpu_present_map);
}
+#ifdef CONFIG_X86_64
+int hard_smp_processor_id(void)
+{
+ return read_apic_id();
+}
+#endif
+
/*
* Power management
*/
@@ -1640,7 +1989,7 @@ static int lapic_resume(struct sys_device *dev)
local_irq_save(flags);
-#ifdef CONFIG_X86_64
+#ifdef HAVE_X2APIC
if (x2apic)
enable_x2apic();
else
@@ -1702,7 +2051,7 @@ static struct sys_device device_lapic = {
.cls = &lapic_sysclass,
};
-static void __devinit apic_pm_activate(void)
+static void __cpuinit apic_pm_activate(void)
{
apic_pm_state.active = 1;
}
@@ -1728,16 +2077,87 @@ static void apic_pm_activate(void) { }
#endif /* CONFIG_PM */
+#ifdef CONFIG_X86_64
/*
- * APIC command line parameters
+ * apic_is_clustered_box() -- Check if we can expect good TSC
+ *
+ * Thus far, the major user of this is IBM's Summit2 series:
+ *
+ * Clustered boxes may have unsynced TSC problems if they are
+ * multi-chassis. Use available data to take a good guess.
+ * If in doubt, go HPET.
*/
-static int __init parse_lapic(char *arg)
+__cpuinit int apic_is_clustered_box(void)
{
- force_enable_local_apic = 1;
- return 0;
+ int i, clusters, zeros;
+ unsigned id;
+ u16 *bios_cpu_apicid;
+ DECLARE_BITMAP(clustermap, NUM_APIC_CLUSTERS);
+
+ /*
+ * there is not this kind of box with AMD CPU yet.
+ * Some AMD box with quadcore cpu and 8 sockets apicid
+ * will be [4, 0x23] or [8, 0x27] could be thought to
+ * vsmp box still need checking...
+ */
+ if ((boot_cpu_data.x86_vendor == X86_VENDOR_AMD) && !is_vsmp_box())
+ return 0;
+
+ bios_cpu_apicid = early_per_cpu_ptr(x86_bios_cpu_apicid);
+ bitmap_zero(clustermap, NUM_APIC_CLUSTERS);
+
+ for (i = 0; i < NR_CPUS; i++) {
+ /* are we being called early in kernel startup? */
+ if (bios_cpu_apicid) {
+ id = bios_cpu_apicid[i];
+ }
+ else if (i < nr_cpu_ids) {
+ if (cpu_present(i))
+ id = per_cpu(x86_bios_cpu_apicid, i);
+ else
+ continue;
+ }
+ else
+ break;
+
+ if (id != BAD_APICID)
+ __set_bit(APIC_CLUSTERID(id), clustermap);
+ }
+
+ /* Problem: Partially populated chassis may not have CPUs in some of
+ * the APIC clusters they have been allocated. Only present CPUs have
+ * x86_bios_cpu_apicid entries, thus causing zeroes in the bitmap.
+ * Since clusters are allocated sequentially, count zeros only if
+ * they are bounded by ones.
+ */
+ clusters = 0;
+ zeros = 0;
+ for (i = 0; i < NUM_APIC_CLUSTERS; i++) {
+ if (test_bit(i, clustermap)) {
+ clusters += 1 + zeros;
+ zeros = 0;
+ } else
+ ++zeros;
+ }
+
+ /* ScaleMP vSMPowered boxes have one cluster per board and TSCs are
+ * not guaranteed to be synced between boards
+ */
+ if (is_vsmp_box() && clusters > 1)
+ return 1;
+
+ /*
+ * If clusters > 2, then should be multi-chassis.
+ * May have to revisit this when multi-core + hyperthreaded CPUs come
+ * out, but AFAIK this will work even for them.
+ */
+ return (clusters > 2);
}
-early_param("lapic", parse_lapic);
+#endif
+/*
+ * APIC command line parameters
+ */
static int __init setup_disableapic(char *arg)
{
disable_apic = 1;
@@ -1779,7 +2199,6 @@ static int __init apic_set_verbosity(char *arg)
if (!arg) {
#ifdef CONFIG_X86_64
skip_ioapic_setup = 0;
- ioapic_force = 1;
return 0;
#endif
return -EINVAL;
diff --git a/arch/x86/kernel/apic_64.c b/arch/x86/kernel/apic_64.c
deleted file mode 100644
index 94ddb69ae15..00000000000
--- a/arch/x86/kernel/apic_64.c
+++ /dev/null
@@ -1,1848 +0,0 @@
-/*
- * Local APIC handling, local APIC timers
- *
- * (c) 1999, 2000 Ingo Molnar <mingo@redhat.com>
- *
- * Fixes
- * Maciej W. Rozycki : Bits for genuine 82489DX APICs;
- * thanks to Eric Gilmore
- * and Rolf G. Tews
- * for testing these extensively.
- * Maciej W. Rozycki : Various updates and fixes.
- * Mikael Pettersson : Power Management for UP-APIC.
- * Pavel Machek and
- * Mikael Pettersson : PM converted to driver model.
- */
-
-#include <linux/init.h>
-
-#include <linux/mm.h>
-#include <linux/delay.h>
-#include <linux/bootmem.h>
-#include <linux/interrupt.h>
-#include <linux/mc146818rtc.h>
-#include <linux/kernel_stat.h>
-#include <linux/sysdev.h>
-#include <linux/ioport.h>
-#include <linux/clockchips.h>
-#include <linux/acpi_pmtmr.h>
-#include <linux/module.h>
-#include <linux/dmar.h>
-
-#include <asm/atomic.h>
-#include <asm/smp.h>
-#include <asm/mtrr.h>
-#include <asm/mpspec.h>
-#include <asm/hpet.h>
-#include <asm/pgalloc.h>
-#include <asm/nmi.h>
-#include <asm/idle.h>
-#include <asm/proto.h>
-#include <asm/timex.h>
-#include <asm/apic.h>
-#include <asm/i8259.h>
-
-#include <mach_ipi.h>
-#include <mach_apic.h>
-
-/* Disable local APIC timer from the kernel commandline or via dmi quirk */
-static int disable_apic_timer __cpuinitdata;
-static int apic_calibrate_pmtmr __initdata;
-int disable_apic;
-int disable_x2apic;
-int x2apic;
-
-/* x2apic enabled before OS handover */
-int x2apic_preenabled;
-
-/* Local APIC timer works in C2 */
-int local_apic_timer_c2_ok;
-EXPORT_SYMBOL_GPL(local_apic_timer_c2_ok);
-
-/*
- * Debug level, exported for io_apic.c
- */
-unsigned int apic_verbosity;
-
-/* Have we found an MP table */
-int smp_found_config;
-
-static struct resource lapic_resource = {
- .name = "Local APIC",
- .flags = IORESOURCE_MEM | IORESOURCE_BUSY,
-};
-
-static unsigned int calibration_result;
-
-static int lapic_next_event(unsigned long delta,
- struct clock_event_device *evt);
-static void lapic_timer_setup(enum clock_event_mode mode,
- struct clock_event_device *evt);
-static void lapic_timer_broadcast(cpumask_t mask);
-static void apic_pm_activate(void);
-
-/*
- * The local apic timer can be used for any function which is CPU local.
- */
-static struct clock_event_device lapic_clockevent = {
- .name = "lapic",
- .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT
- | CLOCK_EVT_FEAT_C3STOP | CLOCK_EVT_FEAT_DUMMY,
- .shift = 32,
- .set_mode = lapic_timer_setup,
- .set_next_event = lapic_next_event,
- .broadcast = lapic_timer_broadcast,
- .rating = 100,
- .irq = -1,
-};
-static DEFINE_PER_CPU(struct clock_event_device, lapic_events);
-
-static unsigned long apic_phys;
-
-unsigned long mp_lapic_addr;
-
-/*
- * Get the LAPIC version
- */
-static inline int lapic_get_version(void)
-{
- return GET_APIC_VERSION(apic_read(APIC_LVR));
-}
-
-/*
- * Check, if the APIC is integrated or a separate chip
- */
-static inline int lapic_is_integrated(void)
-{
-#ifdef CONFIG_X86_64
- return 1;
-#else
- return APIC_INTEGRATED(lapic_get_version());
-#endif
-}
-
-/*
- * Check, whether this is a modern or a first generation APIC
- */
-static int modern_apic(void)
-{
- /* AMD systems use old APIC versions, so check the CPU */
- if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
- boot_cpu_data.x86 >= 0xf)
- return 1;
- return lapic_get_version() >= 0x14;
-}
-
-/*
- * Paravirt kernels also might be using these below ops. So we still
- * use generic apic_read()/apic_write(), which might be pointing to different
- * ops in PARAVIRT case.
- */
-void xapic_wait_icr_idle(void)
-{
- while (apic_read(APIC_ICR) & APIC_ICR_BUSY)
- cpu_relax();
-}
-
-u32 safe_xapic_wait_icr_idle(void)
-{
- u32 send_status;
- int timeout;
-
- timeout = 0;
- do {
- send_status = apic_read(APIC_ICR) & APIC_ICR_BUSY;
- if (!send_status)
- break;
- udelay(100);
- } while (timeout++ < 1000);
-
- return send_status;
-}
-
-void xapic_icr_write(u32 low, u32 id)
-{
- apic_write(APIC_ICR2, SET_APIC_DEST_FIELD(id));
- apic_write(APIC_ICR, low);
-}
-
-u64 xapic_icr_read(void)
-{
- u32 icr1, icr2;
-
- icr2 = apic_read(APIC_ICR2);
- icr1 = apic_read(APIC_ICR);
-
- return icr1 | ((u64)icr2 << 32);
-}
-
-static struct apic_ops xapic_ops = {
- .read = native_apic_mem_read,
- .write = native_apic_mem_write,
- .icr_read = xapic_icr_read,
- .icr_write = xapic_icr_write,
- .wait_icr_idle = xapic_wait_icr_idle,
- .safe_wait_icr_idle = safe_xapic_wait_icr_idle,
-};
-
-struct apic_ops __read_mostly *apic_ops = &xapic_ops;
-EXPORT_SYMBOL_GPL(apic_ops);
-
-static void x2apic_wait_icr_idle(void)
-{
- /* no need to wait for icr idle in x2apic */
- return;
-}
-
-static u32 safe_x2apic_wait_icr_idle(void)
-{
- /* no need to wait for icr idle in x2apic */
- return 0;
-}
-
-void x2apic_icr_write(u32 low, u32 id)
-{
- wrmsrl(APIC_BASE_MSR + (APIC_ICR >> 4), ((__u64) id) << 32 | low);
-}
-
-u64 x2apic_icr_read(void)
-{
- unsigned long val;
-
- rdmsrl(APIC_BASE_MSR + (APIC_ICR >> 4), val);
- return val;
-}
-
-static struct apic_ops x2apic_ops = {
- .read = native_apic_msr_read,
- .write = native_apic_msr_write,
- .icr_read = x2apic_icr_read,
- .icr_write = x2apic_icr_write,
- .wait_icr_idle = x2apic_wait_icr_idle,
- .safe_wait_icr_idle = safe_x2apic_wait_icr_idle,
-};
-
-/**
- * enable_NMI_through_LVT0 - enable NMI through local vector table 0
- */
-void __cpuinit enable_NMI_through_LVT0(void)
-{
- unsigned int v;
-
- /* unmask and set to NMI */
- v = APIC_DM_NMI;
-
- /* Level triggered for 82489DX (32bit mode) */
- if (!lapic_is_integrated())
- v |= APIC_LVT_LEVEL_TRIGGER;
-
- apic_write(APIC_LVT0, v);
-}
-
-/**
- * lapic_get_maxlvt - get the maximum number of local vector table entries
- */
-int lapic_get_maxlvt(void)
-{
- unsigned int v;
-
- v = apic_read(APIC_LVR);
- /*
- * - we always have APIC integrated on 64bit mode
- * - 82489DXs do not report # of LVT entries
- */
- return APIC_INTEGRATED(GET_APIC_VERSION(v)) ? GET_APIC_MAXLVT(v) : 2;
-}
-
-/*
- * Local APIC timer
- */
-
-/* Clock divisor */
-#ifdef CONFG_X86_64
-#define APIC_DIVISOR 1
-#else
-#define APIC_DIVISOR 16
-#endif
-
-/*
- * This function sets up the local APIC timer, with a timeout of
- * 'clocks' APIC bus clock. During calibration we actually call
- * this function twice on the boot CPU, once with a bogus timeout
- * value, second time for real. The other (noncalibrating) CPUs
- * call this function only once, with the real, calibrated value.
- *
- * We do reads before writes even if unnecessary, to get around the
- * P5 APIC double write bug.
- */
-static void __setup_APIC_LVTT(unsigned int clocks, int oneshot, int irqen)
-{
- unsigned int lvtt_value, tmp_value;
-
- lvtt_value = LOCAL_TIMER_VECTOR;
- if (!oneshot)
- lvtt_value |= APIC_LVT_TIMER_PERIODIC;
- if (!lapic_is_integrated())
- lvtt_value |= SET_APIC_TIMER_BASE(APIC_TIMER_BASE_DIV);
-
- if (!irqen)
- lvtt_value |= APIC_LVT_MASKED;
-
- apic_write(APIC_LVTT, lvtt_value);
-
- /*
- * Divide PICLK by 16
- */
- tmp_value = apic_read(APIC_TDCR);
- apic_write(APIC_TDCR,
- (tmp_value & ~(APIC_TDR_DIV_1 | APIC_TDR_DIV_TMBASE)) |
- APIC_TDR_DIV_16);
-
- if (!oneshot)
- apic_write(APIC_TMICT, clocks / APIC_DIVISOR);
-}
-
-/*
- * Setup extended LVT, AMD specific (K8, family 10h)
- *
- * Vector mappings are hard coded. On K8 only offset 0 (APIC500) and
- * MCE interrupts are supported. Thus MCE offset must be set to 0.
- *
- * If mask=1, the LVT entry does not generate interrupts while mask=0
- * enables the vector. See also the BKDGs.
- */
-
-#define APIC_EILVT_LVTOFF_MCE 0
-#define APIC_EILVT_LVTOFF_IBS 1
-
-static void setup_APIC_eilvt(u8 lvt_off, u8 vector, u8 msg_type, u8 mask)
-{
- unsigned long reg = (lvt_off << 4) + APIC_EILVT0;
- unsigned int v = (mask << 16) | (msg_type << 8) | vector;
-
- apic_write(reg, v);
-}
-
-u8 setup_APIC_eilvt_mce(u8 vector, u8 msg_type, u8 mask)
-{
- setup_APIC_eilvt(APIC_EILVT_LVTOFF_MCE, vector, msg_type, mask);
- return APIC_EILVT_LVTOFF_MCE;
-}
-
-u8 setup_APIC_eilvt_ibs(u8 vector, u8 msg_type, u8 mask)
-{
- setup_APIC_eilvt(APIC_EILVT_LVTOFF_IBS, vector, msg_type, mask);
- return APIC_EILVT_LVTOFF_IBS;
-}
-EXPORT_SYMBOL_GPL(setup_APIC_eilvt_ibs);
-
-/*
- * Program the next event, relative to now
- */
-static int lapic_next_event(unsigned long delta,
- struct clock_event_device *evt)
-{
- apic_write(APIC_TMICT, delta);
- return 0;
-}
-
-/*
- * Setup the lapic timer in periodic or oneshot mode
- */
-static void lapic_timer_setup(enum clock_event_mode mode,
- struct clock_event_device *evt)
-{
- unsigned long flags;
- unsigned int v;
-
- /* Lapic used as dummy for broadcast ? */
- if (evt->features & CLOCK_EVT_FEAT_DUMMY)
- return;
-
- local_irq_save(flags);
-
- switch (mode) {
- case CLOCK_EVT_MODE_PERIODIC:
- case CLOCK_EVT_MODE_ONESHOT:
- __setup_APIC_LVTT(calibration_result,
- mode != CLOCK_EVT_MODE_PERIODIC, 1);
- break;
- case CLOCK_EVT_MODE_UNUSED:
- case CLOCK_EVT_MODE_SHUTDOWN:
- v = apic_read(APIC_LVTT);
- v |= (APIC_LVT_MASKED | LOCAL_TIMER_VECTOR);
- apic_write(APIC_LVTT, v);
- break;
- case CLOCK_EVT_MODE_RESUME:
- /* Nothing to do here */
- break;
- }
-
- local_irq_restore(flags);
-}
-
-/*
- * Local APIC timer broadcast function
- */
-static void lapic_timer_broadcast(cpumask_t mask)
-{
-#ifdef CONFIG_SMP
- send_IPI_mask(mask, LOCAL_TIMER_VECTOR);
-#endif
-}
-
-/*
- * Setup the local APIC timer for this CPU. Copy the initilized values
- * of the boot CPU and register the clock event in the framework.
- */
-static void setup_APIC_timer(void)
-{
- struct clock_event_device *levt = &__get_cpu_var(lapic_events);
-
- memcpy(levt, &lapic_clockevent, sizeof(*levt));
- levt->cpumask = cpumask_of_cpu(smp_processor_id());
-
- clockevents_register_device(levt);
-}
-
-/*
- * In this function we calibrate APIC bus clocks to the external
- * timer. Unfortunately we cannot use jiffies and the timer irq
- * to calibrate, since some later bootup code depends on getting
- * the first irq? Ugh.
- *
- * We want to do the calibration only once since we
- * want to have local timer irqs syncron. CPUs connected
- * by the same APIC bus have the very same bus frequency.
- * And we want to have irqs off anyways, no accidental
- * APIC irq that way.
- */
-
-#define TICK_COUNT 100000000
-
-static int __init calibrate_APIC_clock(void)
-{
- unsigned apic, apic_start;
- unsigned long tsc, tsc_start;
- int result;
-
- local_irq_disable();
-
- /*
- * Put whatever arbitrary (but long enough) timeout
- * value into the APIC clock, we just want to get the
- * counter running for calibration.
- *
- * No interrupt enable !
- */
- __setup_APIC_LVTT(250000000, 0, 0);
-
- apic_start = apic_read(APIC_TMCCT);
-#ifdef CONFIG_X86_PM_TIMER
- if (apic_calibrate_pmtmr && pmtmr_ioport) {
- pmtimer_wait(5000); /* 5ms wait */
- apic = apic_read(APIC_TMCCT);
- result = (apic_start - apic) * 1000L / 5;
- } else
-#endif
- {
- rdtscll(tsc_start);
-
- do {
- apic = apic_read(APIC_TMCCT);
- rdtscll(tsc);
- } while ((tsc - tsc_start) < TICK_COUNT &&
- (apic_start - apic) < TICK_COUNT);
-
- result = (apic_start - apic) * 1000L * tsc_khz /
- (tsc - tsc_start);
- }
-
- local_irq_enable();
-
- printk(KERN_DEBUG "APIC timer calibration result %d\n", result);
-
- printk(KERN_INFO "Detected %d.%03d MHz APIC timer.\n",
- result / 1000 / 1000, result / 1000 % 1000);
-
- /* Calculate the scaled math multiplication factor */
- lapic_clockevent.mult = div_sc(result, NSEC_PER_SEC,
- lapic_clockevent.shift);
- lapic_clockevent.max_delta_ns =
- clockevent_delta2ns(0x7FFFFF, &lapic_clockevent);
- lapic_clockevent.min_delta_ns =
- clockevent_delta2ns(0xF, &lapic_clockevent);
-
- calibration_result = (result * APIC_DIVISOR) / HZ;
-
- /*
- * Do a sanity check on the APIC calibration result
- */
- if (calibration_result < (1000000 / HZ)) {
- printk(KERN_WARNING
- "APIC frequency too slow, disabling apic timer\n");
- return -1;
- }
-
- return 0;
-}
-
-/*
- * Setup the boot APIC
- *
- * Calibrate and verify the result.
- */
-void __init setup_boot_APIC_clock(void)
-{
- /*
- * The local apic timer can be disabled via the kernel
- * commandline or from the CPU detection code. Register the lapic
- * timer as a dummy clock event source on SMP systems, so the
- * broadcast mechanism is used. On UP systems simply ignore it.
- */
- if (disable_apic_timer) {
- printk(KERN_INFO "Disabling APIC timer\n");
- /* No broadcast on UP ! */
- if (num_possible_cpus() > 1) {
- lapic_clockevent.mult = 1;
- setup_APIC_timer();
- }
- return;
- }
-
- apic_printk(APIC_VERBOSE, "Using local APIC timer interrupts.\n"
- "calibrating APIC timer ...\n");
-
- if (calibrate_APIC_clock()) {
- /* No broadcast on UP ! */
- if (num_possible_cpus() > 1)
- setup_APIC_timer();
- return;
- }
-
- /*
- * If nmi_watchdog is set to IO_APIC, we need the
- * PIT/HPET going. Otherwise register lapic as a dummy
- * device.
- */
- if (nmi_watchdog != NMI_IO_APIC)
- lapic_clockevent.features &= ~CLOCK_EVT_FEAT_DUMMY;
- else
- printk(KERN_WARNING "APIC timer registered as dummy,"
- " due to nmi_watchdog=%d!\n", nmi_watchdog);
-
- /* Setup the lapic or request the broadcast */
- setup_APIC_timer();
-}
-
-void __cpuinit setup_secondary_APIC_clock(void)
-{
- setup_APIC_timer();
-}
-
-/*
- * The guts of the apic timer interrupt
- */
-static void local_apic_timer_interrupt(void)
-{
- int cpu = smp_processor_id();
- struct clock_event_device *evt = &per_cpu(lapic_events, cpu);
-
- /*
- * Normally we should not be here till LAPIC has been initialized but
- * in some cases like kdump, its possible that there is a pending LAPIC
- * timer interrupt from previous kernel's context and is delivered in
- * new kernel the moment interrupts are enabled.
- *
- * Interrupts are enabled early and LAPIC is setup much later, hence
- * its possible that when we get here evt->event_handler is NULL.
- * Check for event_handler being NULL and discard the interrupt as
- * spurious.
- */
- if (!evt->event_handler) {
- printk(KERN_WARNING
- "Spurious LAPIC timer interrupt on cpu %d\n", cpu);
- /* Switch it off */
- lapic_timer_setup(CLOCK_EVT_MODE_SHUTDOWN, evt);
- return;
- }
-
- /*
- * the NMI deadlock-detector uses this.
- */
-#ifdef CONFIG_X86_64
- add_pda(apic_timer_irqs, 1);
-#else
- per_cpu(irq_stat, cpu).apic_timer_irqs++;
-#endif
-
- evt->event_handler(evt);
-}
-
-/*
- * Local APIC timer interrupt. This is the most natural way for doing
- * local interrupts, but local timer interrupts can be emulated by
- * broadcast interrupts too. [in case the hw doesn't support APIC timers]
- *
- * [ if a single-CPU system runs an SMP kernel then we call the local
- * interrupt as well. Thus we cannot inline the local irq ... ]
- */
-void smp_apic_timer_interrupt(struct pt_regs *regs)
-{
- struct pt_regs *old_regs = set_irq_regs(regs);
-
- /*
- * NOTE! We'd better ACK the irq immediately,
- * because timer handling can be slow.
- */
- ack_APIC_irq();
- /*
- * update_process_times() expects us to have done irq_enter().
- * Besides, if we don't timer interrupts ignore the global
- * interrupt lock, which is the WrongThing (tm) to do.
- */
- exit_idle();
- irq_enter();
- local_apic_timer_interrupt();
- irq_exit();
-
- set_irq_regs(old_regs);
-}
-
-int setup_profiling_timer(unsigned int multiplier)
-{
- return -EINVAL;
-}
-
-
-/*
- * Local APIC start and shutdown
- */
-
-/**
- * clear_local_APIC - shutdown the local APIC
- *
- * This is called, when a CPU is disabled and before rebooting, so the state of
- * the local APIC has no dangling leftovers. Also used to cleanout any BIOS
- * leftovers during boot.
- */
-void clear_local_APIC(void)
-{
- int maxlvt;
- u32 v;
-
- /* APIC hasn't been mapped yet */
- if (!apic_phys)
- return;
-
- maxlvt = lapic_get_maxlvt();
- /*
- * Masking an LVT entry can trigger a local APIC error
- * if the vector is zero. Mask LVTERR first to prevent this.
- */
- if (maxlvt >= 3) {
- v = ERROR_APIC_VECTOR; /* any non-zero vector will do */
- apic_write(APIC_LVTERR, v | APIC_LVT_MASKED);
- }
- /*
- * Careful: we have to set masks only first to deassert
- * any level-triggered sources.
- */
- v = apic_read(APIC_LVTT);
- apic_write(APIC_LVTT, v | APIC_LVT_MASKED);
- v = apic_read(APIC_LVT0);
- apic_write(APIC_LVT0, v | APIC_LVT_MASKED);
- v = apic_read(APIC_LVT1);
- apic_write(APIC_LVT1, v | APIC_LVT_MASKED);
- if (maxlvt >= 4) {
- v = apic_read(APIC_LVTPC);
- apic_write(APIC_LVTPC, v | APIC_LVT_MASKED);
- }
-
- /* lets not touch this if we didn't frob it */
-#if defined(CONFIG_X86_MCE_P4THERMAL) || defined(X86_MCE_INTEL)
- if (maxlvt >= 5) {
- v = apic_read(APIC_LVTTHMR);
- apic_write(APIC_LVTTHMR, v | APIC_LVT_MASKED);
- }
-#endif
- /*
- * Clean APIC state for other OSs:
- */
- apic_write(APIC_LVTT, APIC_LVT_MASKED);
- apic_write(APIC_LVT0, APIC_LVT_MASKED);
- apic_write(APIC_LVT1, APIC_LVT_MASKED);
- if (maxlvt >= 3)
- apic_write(APIC_LVTERR, APIC_LVT_MASKED);
- if (maxlvt >= 4)
- apic_write(APIC_LVTPC, APIC_LVT_MASKED);
-
- /* Integrated APIC (!82489DX) ? */
- if (lapic_is_integrated()) {
- if (maxlvt > 3)
- /* Clear ESR due to Pentium errata 3AP and 11AP */
- apic_write(APIC_ESR, 0);
- apic_read(APIC_ESR);
- }
-}
-
-/**
- * disable_local_APIC - clear and disable the local APIC
- */
-void disable_local_APIC(void)
-{
- unsigned int value;
-
- clear_local_APIC();
-
- /*
- * Disable APIC (implies clearing of registers
- * for 82489DX!).
- */
- value = apic_read(APIC_SPIV);
- value &= ~APIC_SPIV_APIC_ENABLED;
- apic_write(APIC_SPIV, value);
-
-#ifdef CONFIG_X86_32
- /*
- * When LAPIC was disabled by the BIOS and enabled by the kernel,
- * restore the disabled state.
- */
- if (enabled_via_apicbase) {
- unsigned int l, h;
-
- rdmsr(MSR_IA32_APICBASE, l, h);
- l &= ~MSR_IA32_APICBASE_ENABLE;
- wrmsr(MSR_IA32_APICBASE, l, h);
- }
-#endif
-}
-
-/*
- * If Linux enabled the LAPIC against the BIOS default disable it down before
- * re-entering the BIOS on shutdown. Otherwise the BIOS may get confused and
- * not power-off. Additionally clear all LVT entries before disable_local_APIC
- * for the case where Linux didn't enable the LAPIC.
- */
-void lapic_shutdown(void)
-{
- unsigned long flags;
-
- if (!cpu_has_apic)
- return;
-
- local_irq_save(flags);
-
-#ifdef CONFIG_X86_32
- if (!enabled_via_apicbase)
- clear_local_APIC();
- else
-#endif
- disable_local_APIC();
-
-
- local_irq_restore(flags);
-}
-
-/*
- * This is to verify that we're looking at a real local APIC.
- * Check these against your board if the CPUs aren't getting
- * started for no apparent reason.
- */
-int __init verify_local_APIC(void)
-{
- unsigned int reg0, reg1;
-
- /*
- * The version register is read-only in a real APIC.
- */
- reg0 = apic_read(APIC_LVR);
- apic_printk(APIC_DEBUG, "Getting VERSION: %x\n", reg0);
- apic_write(APIC_LVR, reg0 ^ APIC_LVR_MASK);
- reg1 = apic_read(APIC_LVR);
- apic_printk(APIC_DEBUG, "Getting VERSION: %x\n", reg1);
-
- /*
- * The two version reads above should print the same
- * numbers. If the second one is different, then we
- * poke at a non-APIC.
- */
- if (reg1 != reg0)
- return 0;
-
- /*
- * Check if the version looks reasonably.
- */
- reg1 = GET_APIC_VERSION(reg0);
- if (reg1 == 0x00 || reg1 == 0xff)
- return 0;
- reg1 = lapic_get_maxlvt();
- if (reg1 < 0x02 || reg1 == 0xff)
- return 0;
-
- /*
- * The ID register is read/write in a real APIC.
- */
- reg0 = apic_read(APIC_ID);
- apic_printk(APIC_DEBUG, "Getting ID: %x\n", reg0);
- apic_write(APIC_ID, reg0 ^ APIC_ID_MASK);
- reg1 = apic_read(APIC_ID);
- apic_printk(APIC_DEBUG, "Getting ID: %x\n", reg1);
- apic_write(APIC_ID, reg0);
- if (reg1 != (reg0 ^ APIC_ID_MASK))
- return 0;
-
- /*
- * The next two are just to see if we have sane values.
- * They're only really relevant if we're in Virtual Wire
- * compatibility mode, but most boxes are anymore.
- */
- reg0 = apic_read(APIC_LVT0);
- apic_printk(APIC_DEBUG, "Getting LVT0: %x\n", reg0);
- reg1 = apic_read(APIC_LVT1);
- apic_printk(APIC_DEBUG, "Getting LVT1: %x\n", reg1);
-
- return 1;
-}
-
-/**
- * sync_Arb_IDs - synchronize APIC bus arbitration IDs
- */
-void __init sync_Arb_IDs(void)
-{
- /*
- * Unsupported on P4 - see Intel Dev. Manual Vol. 3, Ch. 8.6.1 And not
- * needed on AMD.
- */
- if (modern_apic() || boot_cpu_data.x86_vendor == X86_VENDOR_AMD)
- return;
-
- /*
- * Wait for idle.
- */
- apic_wait_icr_idle();
-
- apic_printk(APIC_DEBUG, "Synchronizing Arb IDs.\n");
- apic_write(APIC_ICR, APIC_DEST_ALLINC |
- APIC_INT_LEVELTRIG | APIC_DM_INIT);
-}
-
-/*
- * An initial setup of the virtual wire mode.
- */
-void __init init_bsp_APIC(void)
-{
- unsigned int value;
-
- /*
- * Don't do the setup now if we have a SMP BIOS as the
- * through-I/O-APIC virtual wire mode might be active.
- */
- if (smp_found_config || !cpu_has_apic)
- return;
-
- /*
- * Do not trust the local APIC being empty at bootup.
- */
- clear_local_APIC();
-
- /*
- * Enable APIC.
- */
- value = apic_read(APIC_SPIV);
- value &= ~APIC_VECTOR_MASK;
- value |= APIC_SPIV_APIC_ENABLED;
-
-#ifdef CONFIG_X86_32
- /* This bit is reserved on P4/Xeon and should be cleared */
- if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
- (boot_cpu_data.x86 == 15))
- value &= ~APIC_SPIV_FOCUS_DISABLED;
- else
-#endif
- value |= APIC_SPIV_FOCUS_DISABLED;
- value |= SPURIOUS_APIC_VECTOR;
- apic_write(APIC_SPIV, value);
-
- /*
- * Set up the virtual wire mode.
- */
- apic_write(APIC_LVT0, APIC_DM_EXTINT);
- value = APIC_DM_NMI;
- if (!lapic_is_integrated()) /* 82489DX */
- value |= APIC_LVT_LEVEL_TRIGGER;
- apic_write(APIC_LVT1, value);
-}
-
-static void __cpuinit lapic_setup_esr(void)
-{
- unsigned long oldvalue, value, maxlvt;
- if (lapic_is_integrated() && !esr_disable) {
- if (esr_disable) {
- /*
- * Something untraceable is creating bad interrupts on
- * secondary quads ... for the moment, just leave the
- * ESR disabled - we can't do anything useful with the
- * errors anyway - mbligh
- */
- printk(KERN_INFO "Leaving ESR disabled.\n");
- return;
- }
- /* !82489DX */
- maxlvt = lapic_get_maxlvt();
- if (maxlvt > 3) /* Due to the Pentium erratum 3AP. */
- apic_write(APIC_ESR, 0);
- oldvalue = apic_read(APIC_ESR);
-
- /* enables sending errors */
- value = ERROR_APIC_VECTOR;
- apic_write(APIC_LVTERR, value);
- /*
- * spec says clear errors after enabling vector.
- */
- if (maxlvt > 3)
- apic_write(APIC_ESR, 0);
- value = apic_read(APIC_ESR);
- if (value != oldvalue)
- apic_printk(APIC_VERBOSE, "ESR value before enabling "
- "vector: 0x%08lx after: 0x%08lx\n",
- oldvalue, value);
- } else {
- printk(KERN_INFO "No ESR for 82489DX.\n");
- }
-}
-
-
-/**
- * setup_local_APIC - setup the local APIC
- */
-void __cpuinit setup_local_APIC(void)
-{
- unsigned int value;
- int i, j;
-
- preempt_disable();
- value = apic_read(APIC_LVR);
-
- BUILD_BUG_ON((SPURIOUS_APIC_VECTOR & 0x0f) != 0x0f);
-
- /*
- * Double-check whether this APIC is really registered.
- * This is meaningless in clustered apic mode, so we skip it.
- */
- if (!apic_id_registered())
- BUG();
-
- /*
- * Intel recommends to set DFR, LDR and TPR before enabling
- * an APIC. See e.g. "AP-388 82489DX User's Manual" (Intel
- * document number 292116). So here it goes...
- */
- init_apic_ldr();
-
- /*
- * Set Task Priority to 'accept all'. We never change this
- * later on.
- */
- value = apic_read(APIC_TASKPRI);
- value &= ~APIC_TPRI_MASK;
- apic_write(APIC_TASKPRI, value);
-
- /*
- * After a crash, we no longer service the interrupts and a pending
- * interrupt from previous kernel might still have ISR bit set.
- *
- * Most probably by now CPU has serviced that pending interrupt and
- * it might not have done the ack_APIC_irq() because it thought,
- * interrupt came from i8259 as ExtInt. LAPIC did not get EOI so it
- * does not clear the ISR bit and cpu thinks it has already serivced
- * the interrupt. Hence a vector might get locked. It was noticed
- * for timer irq (vector 0x31). Issue an extra EOI to clear ISR.
- */
- for (i = APIC_ISR_NR - 1; i >= 0; i--) {
- value = apic_read(APIC_ISR + i*0x10);
- for (j = 31; j >= 0; j--) {
- if (value & (1<<j))
- ack_APIC_irq();
- }
- }
-
- /*
- * Now that we are all set up, enable the APIC
- */
- value = apic_read(APIC_SPIV);
- value &= ~APIC_VECTOR_MASK;
- /*
- * Enable APIC
- */
- value |= APIC_SPIV_APIC_ENABLED;
-
- /* We always use processor focus */
-
- /*
- * Set spurious IRQ vector
- */
- value |= SPURIOUS_APIC_VECTOR;
- apic_write(APIC_SPIV, value);
-
- /*
- * Set up LVT0, LVT1:
- *
- * set up through-local-APIC on the BP's LINT0. This is not
- * strictly necessary in pure symmetric-IO mode, but sometimes
- * we delegate interrupts to the 8259A.
- */
- /*
- * TODO: set up through-local-APIC from through-I/O-APIC? --macro
- */
- value = apic_read(APIC_LVT0) & APIC_LVT_MASKED;
- if (!smp_processor_id() && !value) {
- value = APIC_DM_EXTINT;
- apic_printk(APIC_VERBOSE, "enabled ExtINT on CPU#%d\n",
- smp_processor_id());
- } else {
- value = APIC_DM_EXTINT | APIC_LVT_MASKED;
- apic_printk(APIC_VERBOSE, "masked ExtINT on CPU#%d\n",
- smp_processor_id());
- }
- apic_write(APIC_LVT0, value);
-
- /*
- * only the BP should see the LINT1 NMI signal, obviously.
- */
- if (!smp_processor_id())
- value = APIC_DM_NMI;
- else
- value = APIC_DM_NMI | APIC_LVT_MASKED;
- apic_write(APIC_LVT1, value);
- preempt_enable();
-}
-
-void __cpuinit end_local_APIC_setup(void)
-{
- lapic_setup_esr();
-
-#ifdef CONFIG_X86_32
- {
- unsigned int value;
- /* Disable the local apic timer */
- value = apic_read(APIC_LVTT);
- value |= (APIC_LVT_MASKED | LOCAL_TIMER_VECTOR);
- apic_write(APIC_LVTT, value);
- }
-#endif
-
- setup_apic_nmi_watchdog(NULL);
- apic_pm_activate();
-}
-
-void check_x2apic(void)
-{
- int msr, msr2;
-
- rdmsr(MSR_IA32_APICBASE, msr, msr2);
-
- if (msr & X2APIC_ENABLE) {
- printk("x2apic enabled by BIOS, switching to x2apic ops\n");
- x2apic_preenabled = x2apic = 1;
- apic_ops = &x2apic_ops;
- }
-}
-
-void enable_x2apic(void)
-{
- int msr, msr2;
-
- rdmsr(MSR_IA32_APICBASE, msr, msr2);
- if (!(msr & X2APIC_ENABLE)) {
- printk("Enabling x2apic\n");
- wrmsr(MSR_IA32_APICBASE, msr | X2APIC_ENABLE, 0);
- }
-}
-
-void enable_IR_x2apic(void)
-{
-#ifdef CONFIG_INTR_REMAP
- int ret;
- unsigned long flags;
-
- if (!cpu_has_x2apic)
- return;
-
- if (!x2apic_preenabled && disable_x2apic) {
- printk(KERN_INFO
- "Skipped enabling x2apic and Interrupt-remapping "
- "because of nox2apic\n");
- return;
- }
-
- if (x2apic_preenabled && disable_x2apic)
- panic("Bios already enabled x2apic, can't enforce nox2apic");
-
- if (!x2apic_preenabled && skip_ioapic_setup) {
- printk(KERN_INFO
- "Skipped enabling x2apic and Interrupt-remapping "
- "because of skipping io-apic setup\n");
- return;
- }
-
- ret = dmar_table_init();
- if (ret) {
- printk(KERN_INFO
- "dmar_table_init() failed with %d:\n", ret);
-
- if (x2apic_preenabled)
- panic("x2apic enabled by bios. But IR enabling failed");
- else
- printk(KERN_INFO
- "Not enabling x2apic,Intr-remapping\n");
- return;
- }
-
- local_irq_save(flags);
- mask_8259A();
- save_mask_IO_APIC_setup();
-
- ret = enable_intr_remapping(1);
-
- if (ret && x2apic_preenabled) {
- local_irq_restore(flags);
- panic("x2apic enabled by bios. But IR enabling failed");
- }
-
- if (ret)
- goto end;
-
- if (!x2apic) {
- x2apic = 1;
- apic_ops = &x2apic_ops;
- enable_x2apic();
- }
-end:
- if (ret)
- /*
- * IR enabling failed
- */
- restore_IO_APIC_setup();
- else
- reinit_intr_remapped_IO_APIC(x2apic_preenabled);
-
- unmask_8259A();
- local_irq_restore(flags);
-
- if (!ret) {
- if (!x2apic_preenabled)
- printk(KERN_INFO
- "Enabled x2apic and interrupt-remapping\n");
- else
- printk(KERN_INFO
- "Enabled Interrupt-remapping\n");
- } else
- printk(KERN_ERR
- "Failed to enable Interrupt-remapping and x2apic\n");
-#else
- if (!cpu_has_x2apic)
- return;
-
- if (x2apic_preenabled)
- panic("x2apic enabled prior OS handover,"
- " enable CONFIG_INTR_REMAP");
-
- printk(KERN_INFO "Enable CONFIG_INTR_REMAP for enabling intr-remapping "
- " and x2apic\n");
-#endif
-
- return;
-}
-
-/*
- * Detect and enable local APICs on non-SMP boards.
- * Original code written by Keir Fraser.
- * On AMD64 we trust the BIOS - if it says no APIC it is likely
- * not correctly set up (usually the APIC timer won't work etc.)
- */
-static int __init detect_init_APIC(void)
-{
- if (!cpu_has_apic) {
- printk(KERN_INFO "No local APIC present\n");
- return -1;
- }
-
- mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
- boot_cpu_physical_apicid = 0;
- return 0;
-}
-
-void __init early_init_lapic_mapping(void)
-{
- unsigned long phys_addr;
-
- /*
- * If no local APIC can be found then go out
- * : it means there is no mpatable and MADT
- */
- if (!smp_found_config)
- return;
-
- phys_addr = mp_lapic_addr;
-
- set_fixmap_nocache(FIX_APIC_BASE, phys_addr);
- apic_printk(APIC_VERBOSE, "mapped APIC to %16lx (%16lx)\n",
- APIC_BASE, phys_addr);
-
- /*
- * Fetch the APIC ID of the BSP in case we have a
- * default configuration (or the MP table is broken).
- */
- boot_cpu_physical_apicid = read_apic_id();
-}
-
-/**
- * init_apic_mappings - initialize APIC mappings
- */
-void __init init_apic_mappings(void)
-{
- if (x2apic) {
- boot_cpu_physical_apicid = read_apic_id();
- return;
- }
-
- /*
- * If no local APIC can be found then set up a fake all
- * zeroes page to simulate the local APIC and another
- * one for the IO-APIC.
- */
- if (!smp_found_config && detect_init_APIC()) {
- apic_phys = (unsigned long) alloc_bootmem_pages(PAGE_SIZE);
- apic_phys = __pa(apic_phys);
- } else
- apic_phys = mp_lapic_addr;
-
- set_fixmap_nocache(FIX_APIC_BASE, apic_phys);
- apic_printk(APIC_VERBOSE, "mapped APIC to %16lx (%16lx)\n",
- APIC_BASE, apic_phys);
-
- /*
- * Fetch the APIC ID of the BSP in case we have a
- * default configuration (or the MP table is broken).
- */
- boot_cpu_physical_apicid = read_apic_id();
-}
-
-/*
- * This initializes the IO-APIC and APIC hardware if this is
- * a UP kernel.
- */
-int apic_version[MAX_APICS];
-
-int __init APIC_init_uniprocessor(void)
-{
- if (disable_apic) {
- printk(KERN_INFO "Apic disabled\n");
- return -1;
- }
- if (!cpu_has_apic) {
- disable_apic = 1;
- printk(KERN_INFO "Apic disabled by BIOS\n");
- return -1;
- }
-
- enable_IR_x2apic();
- setup_apic_routing();
-
- verify_local_APIC();
-
- connect_bsp_APIC();
-
- physid_set_mask_of_physid(boot_cpu_physical_apicid, &phys_cpu_present_map);
- apic_write(APIC_ID, SET_APIC_ID(boot_cpu_physical_apicid));
-
- setup_local_APIC();
-
- /*
- * Now enable IO-APICs, actually call clear_IO_APIC
- * We need clear_IO_APIC before enabling vector on BP
- */
- if (!skip_ioapic_setup && nr_ioapics)
- enable_IO_APIC();
-
- if (!smp_found_config || skip_ioapic_setup || !nr_ioapics)
- localise_nmi_watchdog();
- end_local_APIC_setup();
-
- if (smp_found_config && !skip_ioapic_setup && nr_ioapics)
- setup_IO_APIC();
- else
- nr_ioapics = 0;
- setup_boot_APIC_clock();
- check_nmi_watchdog();
- return 0;
-}
-
-/*
- * Local APIC interrupts
- */
-
-/*
- * This interrupt should _never_ happen with our APIC/SMP architecture
- */
-asmlinkage void smp_spurious_interrupt(void)
-{
- unsigned int v;
- exit_idle();
- irq_enter();
- /*
- * Check if this really is a spurious interrupt and ACK it
- * if it is a vectored one. Just in case...
- * Spurious interrupts should not be ACKed.
- */
- v = apic_read(APIC_ISR + ((SPURIOUS_APIC_VECTOR & ~0x1f) >> 1));
- if (v & (1 << (SPURIOUS_APIC_VECTOR & 0x1f)))
- ack_APIC_irq();
-
- add_pda(irq_spurious_count, 1);
- irq_exit();
-}
-
-/*
- * This interrupt should never happen with our APIC/SMP architecture
- */
-asmlinkage void smp_error_interrupt(void)
-{
- unsigned int v, v1;
-
- exit_idle();
- irq_enter();
- /* First tickle the hardware, only then report what went on. -- REW */
- v = apic_read(APIC_ESR);
- apic_write(APIC_ESR, 0);
- v1 = apic_read(APIC_ESR);
- ack_APIC_irq();
- atomic_inc(&irq_err_count);
-
- /* Here is what the APIC error bits mean:
- 0: Send CS error
- 1: Receive CS error
- 2: Send accept error
- 3: Receive accept error
- 4: Reserved
- 5: Send illegal vector
- 6: Received illegal vector
- 7: Illegal register address
- */
- printk(KERN_DEBUG "APIC error on CPU%d: %02x(%02x)\n",
- smp_processor_id(), v , v1);
- irq_exit();
-}
-
-/**
- * connect_bsp_APIC - attach the APIC to the interrupt system
- */
-void __init connect_bsp_APIC(void)
-{
-#ifdef CONFIG_X86_32
- if (pic_mode) {
- /*
- * Do not trust the local APIC being empty at bootup.
- */
- clear_local_APIC();
- /*
- * PIC mode, enable APIC mode in the IMCR, i.e. connect BSP's
- * local APIC to INT and NMI lines.
- */
- apic_printk(APIC_VERBOSE, "leaving PIC mode, "
- "enabling APIC mode.\n");
- outb(0x70, 0x22);
- outb(0x01, 0x23);
- }
-#endif
- enable_apic_mode();
-}
-
-/**
- * disconnect_bsp_APIC - detach the APIC from the interrupt system
- * @virt_wire_setup: indicates, whether virtual wire mode is selected
- *
- * Virtual wire mode is necessary to deliver legacy interrupts even when the
- * APIC is disabled.
- */
-void disconnect_bsp_APIC(int virt_wire_setup)
-{
- unsigned int value;
-
-#ifdef CONFIG_X86_32
- if (pic_mode) {
- /*
- * Put the board back into PIC mode (has an effect only on
- * certain older boards). Note that APIC interrupts, including
- * IPIs, won't work beyond this point! The only exception are
- * INIT IPIs.
- */
- apic_printk(APIC_VERBOSE, "disabling APIC mode, "
- "entering PIC mode.\n");
- outb(0x70, 0x22);
- outb(0x00, 0x23);
- return;
- }
-#endif
-
- /* Go back to Virtual Wire compatibility mode */
-
- /* For the spurious interrupt use vector F, and enable it */
- value = apic_read(APIC_SPIV);
- value &= ~APIC_VECTOR_MASK;
- value |= APIC_SPIV_APIC_ENABLED;
- value |= 0xf;
- apic_write(APIC_SPIV, value);
-
- if (!virt_wire_setup) {
- /*
- * For LVT0 make it edge triggered, active high,
- * external and enabled
- */
- value = apic_read(APIC_LVT0);
- value &= ~(APIC_MODE_MASK | APIC_SEND_PENDING |
- APIC_INPUT_POLARITY | APIC_LVT_REMOTE_IRR |
- APIC_LVT_LEVEL_TRIGGER | APIC_LVT_MASKED);
- value |= APIC_LVT_REMOTE_IRR | APIC_SEND_PENDING;
- value = SET_APIC_DELIVERY_MODE(value, APIC_MODE_EXTINT);
- apic_write(APIC_LVT0, value);
- } else {
- /* Disable LVT0 */
- apic_write(APIC_LVT0, APIC_LVT_MASKED);
- }
-
- /*
- * For LVT1 make it edge triggered, active high,
- * nmi and enabled
- */
- value = apic_read(APIC_LVT1);
- value &= ~(APIC_MODE_MASK | APIC_SEND_PENDING |
- APIC_INPUT_POLARITY | APIC_LVT_REMOTE_IRR |
- APIC_LVT_LEVEL_TRIGGER | APIC_LVT_MASKED);
- value |= APIC_LVT_REMOTE_IRR | APIC_SEND_PENDING;
- value = SET_APIC_DELIVERY_MODE(value, APIC_MODE_NMI);
- apic_write(APIC_LVT1, value);
-}
-
-void __cpuinit generic_processor_info(int apicid, int version)
-{
- int cpu;
- cpumask_t tmp_map;
-
- /*
- * Validate version
- */
- if (version == 0x0) {
- printk(KERN_WARNING "BIOS bug, APIC version is 0 for CPU#%d! "
- "fixing up to 0x10. (tell your hw vendor)\n",
- version);
- version = 0x10;
- }
- apic_version[apicid] = version;
-
- if (num_processors >= NR_CPUS) {
- printk(KERN_WARNING "WARNING: NR_CPUS limit of %i reached."
- " Processor ignored.\n", NR_CPUS);
- return;
- }
-
- num_processors++;
- cpus_complement(tmp_map, cpu_present_map);
- cpu = first_cpu(tmp_map);
-
- physid_set(apicid, phys_cpu_present_map);
- if (apicid == boot_cpu_physical_apicid) {
- /*
- * x86_bios_cpu_apicid is required to have processors listed
- * in same order as logical cpu numbers. Hence the first
- * entry is BSP, and so on.
- */
- cpu = 0;
- }
- if (apicid > max_physical_apicid)
- max_physical_apicid = apicid;
-
-#ifdef CONFIG_X86_32
- /*
- * Would be preferable to switch to bigsmp when CONFIG_HOTPLUG_CPU=y
- * but we need to work other dependencies like SMP_SUSPEND etc
- * before this can be done without some confusion.
- * if (CPU_HOTPLUG_ENABLED || num_processors > 8)
- * - Ashok Raj <ashok.raj@intel.com>
- */
- if (max_physical_apicid >= 8) {
- switch (boot_cpu_data.x86_vendor) {
- case X86_VENDOR_INTEL:
- if (!APIC_XAPIC(version)) {
- def_to_bigsmp = 0;
- break;
- }
- /* If P4 and above fall through */
- case X86_VENDOR_AMD:
- def_to_bigsmp = 1;
- }
- }
-#endif
-
-#if defined(CONFIG_X86_SMP) || defined(CONFIG_X86_64)
- /* are we being called early in kernel startup? */
- if (early_per_cpu_ptr(x86_cpu_to_apicid)) {
- u16 *cpu_to_apicid = early_per_cpu_ptr(x86_cpu_to_apicid);
- u16 *bios_cpu_apicid = early_per_cpu_ptr(x86_bios_cpu_apicid);
-
- cpu_to_apicid[cpu] = apicid;
- bios_cpu_apicid[cpu] = apicid;
- } else {
- per_cpu(x86_cpu_to_apicid, cpu) = apicid;
- per_cpu(x86_bios_cpu_apicid, cpu) = apicid;
- }
-#endif
-
- cpu_set(cpu, cpu_possible_map);
- cpu_set(cpu, cpu_present_map);
-}
-
-int hard_smp_processor_id(void)
-{
- return read_apic_id();
-}
-
-/*
- * Power management
- */
-#ifdef CONFIG_PM
-
-static struct {
- /*
- * 'active' is true if the local APIC was enabled by us and
- * not the BIOS; this signifies that we are also responsible
- * for disabling it before entering apm/acpi suspend
- */
- int active;
- /* r/w apic fields */
- unsigned int apic_id;
- unsigned int apic_taskpri;
- unsigned int apic_ldr;
- unsigned int apic_dfr;
- unsigned int apic_spiv;
- unsigned int apic_lvtt;
- unsigned int apic_lvtpc;
- unsigned int apic_lvt0;
- unsigned int apic_lvt1;
- unsigned int apic_lvterr;
- unsigned int apic_tmict;
- unsigned int apic_tdcr;
- unsigned int apic_thmr;
-} apic_pm_state;
-
-static int lapic_suspend(struct sys_device *dev, pm_message_t state)
-{
- unsigned long flags;
- int maxlvt;
-
- if (!apic_pm_state.active)
- return 0;
-
- maxlvt = lapic_get_maxlvt();
-
- apic_pm_state.apic_id = apic_read(APIC_ID);
- apic_pm_state.apic_taskpri = apic_read(APIC_TASKPRI);
- apic_pm_state.apic_ldr = apic_read(APIC_LDR);
- apic_pm_state.apic_dfr = apic_read(APIC_DFR);
- apic_pm_state.apic_spiv = apic_read(APIC_SPIV);
- apic_pm_state.apic_lvtt = apic_read(APIC_LVTT);
- if (maxlvt >= 4)
- apic_pm_state.apic_lvtpc = apic_read(APIC_LVTPC);
- apic_pm_state.apic_lvt0 = apic_read(APIC_LVT0);
- apic_pm_state.apic_lvt1 = apic_read(APIC_LVT1);
- apic_pm_state.apic_lvterr = apic_read(APIC_LVTERR);
- apic_pm_state.apic_tmict = apic_read(APIC_TMICT);
- apic_pm_state.apic_tdcr = apic_read(APIC_TDCR);
-#if defined(CONFIG_X86_MCE_P4THERMAL) || defined(CONFIG_X86_MCE_INTEL)
- if (maxlvt >= 5)
- apic_pm_state.apic_thmr = apic_read(APIC_LVTTHMR);
-#endif
-
- local_irq_save(flags);
- disable_local_APIC();
- local_irq_restore(flags);
- return 0;
-}
-
-static int lapic_resume(struct sys_device *dev)
-{
- unsigned int l, h;
- unsigned long flags;
- int maxlvt;
-
- if (!apic_pm_state.active)
- return 0;
-
- maxlvt = lapic_get_maxlvt();
-
- local_irq_save(flags);
-
-#ifdef CONFIG_X86_64
- if (x2apic)
- enable_x2apic();
- else
-#endif
- {
- /*
- * Make sure the APICBASE points to the right address
- *
- * FIXME! This will be wrong if we ever support suspend on
- * SMP! We'll need to do this as part of the CPU restore!
- */
- rdmsr(MSR_IA32_APICBASE, l, h);
- l &= ~MSR_IA32_APICBASE_BASE;
- l |= MSR_IA32_APICBASE_ENABLE | mp_lapic_addr;
- wrmsr(MSR_IA32_APICBASE, l, h);
- }
-
- apic_write(APIC_LVTERR, ERROR_APIC_VECTOR | APIC_LVT_MASKED);
- apic_write(APIC_ID, apic_pm_state.apic_id);
- apic_write(APIC_DFR, apic_pm_state.apic_dfr);
- apic_write(APIC_LDR, apic_pm_state.apic_ldr);
- apic_write(APIC_TASKPRI, apic_pm_state.apic_taskpri);
- apic_write(APIC_SPIV, apic_pm_state.apic_spiv);
- apic_write(APIC_LVT0, apic_pm_state.apic_lvt0);
- apic_write(APIC_LVT1, apic_pm_state.apic_lvt1);
-#if defined(CONFIG_X86_MCE_P4THERMAL) || defined(CONFIG_X86_MCE_INTEL)
- if (maxlvt >= 5)
- apic_write(APIC_LVTTHMR, apic_pm_state.apic_thmr);
-#endif
- if (maxlvt >= 4)
- apic_write(APIC_LVTPC, apic_pm_state.apic_lvtpc);
- apic_write(APIC_LVTT, apic_pm_state.apic_lvtt);
- apic_write(APIC_TDCR, apic_pm_state.apic_tdcr);
- apic_write(APIC_TMICT, apic_pm_state.apic_tmict);
- apic_write(APIC_ESR, 0);
- apic_read(APIC_ESR);
- apic_write(APIC_LVTERR, apic_pm_state.apic_lvterr);
- apic_write(APIC_ESR, 0);
- apic_read(APIC_ESR);
-
- local_irq_restore(flags);
-
- return 0;
-}
-
-/*
- * This device has no shutdown method - fully functioning local APICs
- * are needed on every CPU up until machine_halt/restart/poweroff.
- */
-
-static struct sysdev_class lapic_sysclass = {
- .name = "lapic",
- .resume = lapic_resume,
- .suspend = lapic_suspend,
-};
-
-static struct sys_device device_lapic = {
- .id = 0,
- .cls = &lapic_sysclass,
-};
-
-static void __cpuinit apic_pm_activate(void)
-{
- apic_pm_state.active = 1;
-}
-
-static int __init init_lapic_sysfs(void)
-{
- int error;
-
- if (!cpu_has_apic)
- return 0;
- /* XXX: remove suspend/resume procs if !apic_pm_state.active? */
-
- error = sysdev_class_register(&lapic_sysclass);
- if (!error)
- error = sysdev_register(&device_lapic);
- return error;
-}
-device_initcall(init_lapic_sysfs);
-
-#else /* CONFIG_PM */
-
-static void apic_pm_activate(void) { }
-
-#endif /* CONFIG_PM */
-
-/*
- * apic_is_clustered_box() -- Check if we can expect good TSC
- *
- * Thus far, the major user of this is IBM's Summit2 series:
- *
- * Clustered boxes may have unsynced TSC problems if they are
- * multi-chassis. Use available data to take a good guess.
- * If in doubt, go HPET.
- */
-__cpuinit int apic_is_clustered_box(void)
-{
- int i, clusters, zeros;
- unsigned id;
- u16 *bios_cpu_apicid;
- DECLARE_BITMAP(clustermap, NUM_APIC_CLUSTERS);
-
- /*
- * there is not this kind of box with AMD CPU yet.
- * Some AMD box with quadcore cpu and 8 sockets apicid
- * will be [4, 0x23] or [8, 0x27] could be thought to
- * vsmp box still need checking...
- */
- if ((boot_cpu_data.x86_vendor == X86_VENDOR_AMD) && !is_vsmp_box())
- return 0;
-
- bios_cpu_apicid = early_per_cpu_ptr(x86_bios_cpu_apicid);
- bitmap_zero(clustermap, NUM_APIC_CLUSTERS);
-
- for (i = 0; i < NR_CPUS; i++) {
- /* are we being called early in kernel startup? */
- if (bios_cpu_apicid) {
- id = bios_cpu_apicid[i];
- }
- else if (i < nr_cpu_ids) {
- if (cpu_present(i))
- id = per_cpu(x86_bios_cpu_apicid, i);
- else
- continue;
- }
- else
- break;
-
- if (id != BAD_APICID)
- __set_bit(APIC_CLUSTERID(id), clustermap);
- }
-
- /* Problem: Partially populated chassis may not have CPUs in some of
- * the APIC clusters they have been allocated. Only present CPUs have
- * x86_bios_cpu_apicid entries, thus causing zeroes in the bitmap.
- * Since clusters are allocated sequentially, count zeros only if
- * they are bounded by ones.
- */
- clusters = 0;
- zeros = 0;
- for (i = 0; i < NUM_APIC_CLUSTERS; i++) {
- if (test_bit(i, clustermap)) {
- clusters += 1 + zeros;
- zeros = 0;
- } else
- ++zeros;
- }
-
- /* ScaleMP vSMPowered boxes have one cluster per board and TSCs are
- * not guaranteed to be synced between boards
- */
- if (is_vsmp_box() && clusters > 1)
- return 1;
-
- /*
- * If clusters > 2, then should be multi-chassis.
- * May have to revisit this when multi-core + hyperthreaded CPUs come
- * out, but AFAIK this will work even for them.
- */
- return (clusters > 2);
-}
-
-static __init int setup_nox2apic(char *str)
-{
- disable_x2apic = 1;
- clear_cpu_cap(&boot_cpu_data, X86_FEATURE_X2APIC);
- return 0;
-}
-early_param("nox2apic", setup_nox2apic);
-
-
-/*
- * APIC command line parameters
- */
-static int __init setup_disableapic(char *arg)
-{
- disable_apic = 1;
- setup_clear_cpu_cap(X86_FEATURE_APIC);
- return 0;
-}
-early_param("disableapic", setup_disableapic);
-
-/* same as disableapic, for compatibility */
-static int __init setup_nolapic(char *arg)
-{
- return setup_disableapic(arg);
-}
-early_param("nolapic", setup_nolapic);
-
-static int __init parse_lapic_timer_c2_ok(char *arg)
-{
- local_apic_timer_c2_ok = 1;
- return 0;
-}
-early_param("lapic_timer_c2_ok", parse_lapic_timer_c2_ok);
-
-static int __init parse_disable_apic_timer(char *arg)
-{
- disable_apic_timer = 1;
- return 0;
-}
-early_param("noapictimer", parse_disable_apic_timer);
-
-static int __init parse_nolapic_timer(char *arg)
-{
- disable_apic_timer = 1;
- return 0;
-}
-early_param("nolapic_timer", parse_nolapic_timer);
-
-static __init int setup_apicpmtimer(char *s)
-{
- apic_calibrate_pmtmr = 1;
- notsc_setup(NULL);
- return 0;
-}
-__setup("apicpmtimer", setup_apicpmtimer);
-
-static int __init apic_set_verbosity(char *arg)
-{
- if (!arg) {
-#ifdef CONFIG_X86_64
- skip_ioapic_setup = 0;
- ioapic_force = 1;
- return 0;
-#endif
- return -EINVAL;
- }
-
- if (strcmp("debug", arg) == 0)
- apic_verbosity = APIC_DEBUG;
- else if (strcmp("verbose", arg) == 0)
- apic_verbosity = APIC_VERBOSE;
- else {
- printk(KERN_WARNING "APIC Verbosity level %s not recognised"
- " use apic=verbose or apic=debug\n", arg);
- return -EINVAL;
- }
-
- return 0;
-}
-early_param("apic", apic_set_verbosity);
-
-static int __init lapic_insert_resource(void)
-{
- if (!apic_phys)
- return -1;
-
- /* Put local APIC into the resource map. */
- lapic_resource.start = apic_phys;
- lapic_resource.end = lapic_resource.start + PAGE_SIZE - 1;
- insert_resource(&iomem_resource, &lapic_resource);
-
- return 0;
-}
-
-/*
- * need call insert after e820_reserve_resources()
- * that is using request_resource
- */
-late_initcall(lapic_insert_resource);
diff --git a/arch/x86/kernel/bios_uv.c b/arch/x86/kernel/bios_uv.c
index fdd585f9c53..f0dfe6f17e7 100644
--- a/arch/x86/kernel/bios_uv.c
+++ b/arch/x86/kernel/bios_uv.c
@@ -1,8 +1,6 @@
/*
* BIOS run time interface routines.
*
- * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
- *
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
@@ -16,33 +14,128 @@
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) Russ Anderson
*/
+#include <linux/efi.h>
+#include <asm/efi.h>
+#include <linux/io.h>
#include <asm/uv/bios.h>
+#include <asm/uv/uv_hub.h>
+
+struct uv_systab uv_systab;
-const char *
-x86_bios_strerror(long status)
+s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5)
{
- const char *str;
- switch (status) {
- case 0: str = "Call completed without error"; break;
- case -1: str = "Not implemented"; break;
- case -2: str = "Invalid argument"; break;
- case -3: str = "Call completed with error"; break;
- default: str = "Unknown BIOS status code"; break;
- }
- return str;
+ struct uv_systab *tab = &uv_systab;
+
+ if (!tab->function)
+ /*
+ * BIOS does not support UV systab
+ */
+ return BIOS_STATUS_UNIMPLEMENTED;
+
+ return efi_call6((void *)__va(tab->function),
+ (u64)which, a1, a2, a3, a4, a5);
}
-long
-x86_bios_freq_base(unsigned long which, unsigned long *ticks_per_second,
- unsigned long *drift_info)
+s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
+ u64 a4, u64 a5)
{
- struct uv_bios_retval isrv;
+ unsigned long bios_flags;
+ s64 ret;
- BIOS_CALL(isrv, BIOS_FREQ_BASE, which, 0, 0, 0, 0, 0, 0);
- *ticks_per_second = isrv.v0;
- *drift_info = isrv.v1;
- return isrv.status;
+ local_irq_save(bios_flags);
+ ret = uv_bios_call(which, a1, a2, a3, a4, a5);
+ local_irq_restore(bios_flags);
+
+ return ret;
}
-EXPORT_SYMBOL_GPL(x86_bios_freq_base);
+
+s64 uv_bios_call_reentrant(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
+ u64 a4, u64 a5)
+{
+ s64 ret;
+
+ preempt_disable();
+ ret = uv_bios_call(which, a1, a2, a3, a4, a5);
+ preempt_enable();
+
+ return ret;
+}
+
+
+long sn_partition_id;
+EXPORT_SYMBOL_GPL(sn_partition_id);
+long uv_coherency_id;
+EXPORT_SYMBOL_GPL(uv_coherency_id);
+long uv_region_size;
+EXPORT_SYMBOL_GPL(uv_region_size);
+int uv_type;
+
+
+s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher,
+ long *region)
+{
+ s64 ret;
+ u64 v0, v1;
+ union partition_info_u part;
+
+ ret = uv_bios_call_irqsave(UV_BIOS_GET_SN_INFO, fc,
+ (u64)(&v0), (u64)(&v1), 0, 0);
+ if (ret != BIOS_STATUS_SUCCESS)
+ return ret;
+
+ part.val = v0;
+ if (uvtype)
+ *uvtype = part.hub_version;
+ if (partid)
+ *partid = part.partition_id;
+ if (coher)
+ *coher = part.coherence_id;
+ if (region)
+ *region = part.region_size;
+ return ret;
+}
+
+
+s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second)
+{
+ return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type,
+ (u64)ticks_per_second, 0, 0, 0);
+}
+EXPORT_SYMBOL_GPL(uv_bios_freq_base);
+
+
+#ifdef CONFIG_EFI
+void uv_bios_init(void)
+{
+ struct uv_systab *tab;
+
+ if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) ||
+ (efi.uv_systab == (unsigned long)NULL)) {
+ printk(KERN_CRIT "No EFI UV System Table.\n");
+ uv_systab.function = (unsigned long)NULL;
+ return;
+ }
+
+ tab = (struct uv_systab *)ioremap(efi.uv_systab,
+ sizeof(struct uv_systab));
+ if (strncmp(tab->signature, "UVST", 4) != 0)
+ printk(KERN_ERR "bad signature in UV system table!");
+
+ /*
+ * Copy table to permanent spot for later use.
+ */
+ memcpy(&uv_systab, tab, sizeof(struct uv_systab));
+ iounmap(tab);
+
+ printk(KERN_INFO "EFI UV System Table Revision %d\n", tab->revision);
+}
+#else /* !CONFIG_EFI */
+
+void uv_bios_init(void) { }
+#endif
+
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 32e73520adf..8f1e31db2ad 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -249,7 +249,7 @@ static void __cpuinit srat_detect_node(struct cpuinfo_x86 *c)
}
numa_set_node(cpu, node);
- printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node);
+ printk(KERN_INFO "CPU %d/0x%x -> Node %d\n", cpu, apicid, node);
#endif
}
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 99468dbd08d..cce0b6118d5 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -174,7 +174,7 @@ static void __cpuinit srat_detect_node(void)
node = first_node(node_online_map);
numa_set_node(cpu, node);
- printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node);
+ printk(KERN_INFO "CPU %d/0x%x -> Node %d\n", cpu, apicid, node);
#endif
}
diff --git a/arch/x86/kernel/efi.c b/arch/x86/kernel/efi.c
index 945a31cdd81..1119d247fe1 100644
--- a/arch/x86/kernel/efi.c
+++ b/arch/x86/kernel/efi.c
@@ -367,6 +367,10 @@ void __init efi_init(void)
efi.smbios = config_tables[i].table;
printk(" SMBIOS=0x%lx ", config_tables[i].table);
} else if (!efi_guidcmp(config_tables[i].guid,
+ UV_SYSTEM_TABLE_GUID)) {
+ efi.uv_systab = config_tables[i].table;
+ printk(" UVsystab=0x%lx ", config_tables[i].table);
+ } else if (!efi_guidcmp(config_tables[i].guid,
HCDP_TABLE_GUID)) {
efi.hcdp = config_tables[i].table;
printk(" HCDP=0x%lx ", config_tables[i].table);
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index b21fbfaffe3..4d82171d0f9 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -629,7 +629,7 @@ ENTRY(interrupt)
ENTRY(irq_entries_start)
RING0_INT_FRAME
vector=0
-.rept NR_IRQS
+.rept NR_VECTORS
ALIGN
.if vector
CFI_ADJUST_CFA_OFFSET -4
diff --git a/arch/x86/kernel/genapic_flat_64.c b/arch/x86/kernel/genapic_flat_64.c
index 9eca5ba7a6b..2ec2de8d8c4 100644
--- a/arch/x86/kernel/genapic_flat_64.c
+++ b/arch/x86/kernel/genapic_flat_64.c
@@ -179,8 +179,10 @@ static int __init physflat_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
* is an example).
*/
if (acpi_gbl_FADT.header.revision > FADT2_REVISION_ID &&
- (acpi_gbl_FADT.flags & ACPI_FADT_APIC_PHYSICAL))
+ (acpi_gbl_FADT.flags & ACPI_FADT_APIC_PHYSICAL)) {
+ printk(KERN_DEBUG "system APIC only can use physical flat");
return 1;
+ }
#endif
return 0;
diff --git a/arch/x86/kernel/genx2apic_uv_x.c b/arch/x86/kernel/genx2apic_uv_x.c
index 33581d94a90..bfd532843df 100644
--- a/arch/x86/kernel/genx2apic_uv_x.c
+++ b/arch/x86/kernel/genx2apic_uv_x.c
@@ -341,12 +341,12 @@ static __init void map_mmioh_high(int max_pnode)
static __init void uv_rtc_init(void)
{
- long status, ticks_per_sec, drift;
+ long status;
+ u64 ticks_per_sec;
- status =
- x86_bios_freq_base(BIOS_FREQ_BASE_REALTIME_CLOCK, &ticks_per_sec,
- &drift);
- if (status != 0 || ticks_per_sec < 100000) {
+ status = uv_bios_freq_base(BIOS_FREQ_BASE_REALTIME_CLOCK,
+ &ticks_per_sec);
+ if (status != BIOS_STATUS_SUCCESS || ticks_per_sec < 100000) {
printk(KERN_WARNING
"unable to determine platform RTC clock frequency, "
"guessing.\n");
@@ -356,7 +356,22 @@ static __init void uv_rtc_init(void)
sn_rtc_cycles_per_second = ticks_per_sec;
}
-static bool uv_system_inited;
+/*
+ * Called on each cpu to initialize the per_cpu UV data area.
+ * ZZZ hotplug not supported yet
+ */
+void __cpuinit uv_cpu_init(void)
+{
+ /* CPU 0 initilization will be done via uv_system_init. */
+ if (!uv_blade_info)
+ return;
+
+ uv_blade_info[uv_numa_blade_id()].nr_online_cpus++;
+
+ if (get_uv_system_type() == UV_NON_UNIQUE_APIC)
+ set_x2apic_extra_bits(uv_hub_info->pnode);
+}
+
void __init uv_system_init(void)
{
@@ -412,6 +427,9 @@ void __init uv_system_init(void)
gnode_upper = (((unsigned long)node_id.s.node_id) &
~((1 << n_val) - 1)) << m_val;
+ uv_bios_init();
+ uv_bios_get_sn_info(0, &uv_type, &sn_partition_id,
+ &uv_coherency_id, &uv_region_size);
uv_rtc_init();
for_each_present_cpu(cpu) {
@@ -433,7 +451,7 @@ void __init uv_system_init(void)
uv_cpu_hub_info(cpu)->gpa_mask = (1 << (m_val + n_val)) - 1;
uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper;
uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
- uv_cpu_hub_info(cpu)->coherency_domain_number = 0;/* ZZZ */
+ uv_cpu_hub_info(cpu)->coherency_domain_number = uv_coherency_id;
uv_node_to_blade[nid] = blade;
uv_cpu_to_blade[cpu] = blade;
max_pnode = max(pnode, max_pnode);
@@ -448,21 +466,6 @@ void __init uv_system_init(void)
map_mmr_high(max_pnode);
map_config_high(max_pnode);
map_mmioh_high(max_pnode);
- uv_system_inited = true;
-}
-/*
- * Called on each cpu to initialize the per_cpu UV data area.
- * ZZZ hotplug not supported yet
- */
-void __cpuinit uv_cpu_init(void)
-{
- BUG_ON(!uv_system_inited);
-
- uv_blade_info[uv_numa_blade_id()].nr_online_cpus++;
-
- if (get_uv_system_type() == UV_NON_UNIQUE_APIC)
- set_x2apic_extra_bits(uv_hub_info->pnode);
+ uv_cpu_init();
}
-
-
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index acf62fc233d..77017e834cf 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -1,29 +1,49 @@
#include <linux/clocksource.h>
#include <linux/clockchips.h>
+#include <linux/interrupt.h>
+#include <linux/sysdev.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/hpet.h>
#include <linux/init.h>
-#include <linux/sysdev.h>
+#include <linux/cpu.h>
#include <linux/pm.h>
+#include <linux/io.h>
#include <asm/fixmap.h>
-#include <asm/hpet.h>
#include <asm/i8253.h>
-#include <asm/io.h>
+#include <asm/hpet.h>
-#define HPET_MASK CLOCKSOURCE_MASK(32)
-#define HPET_SHIFT 22
+#define HPET_MASK CLOCKSOURCE_MASK(32)
+#define HPET_SHIFT 22
/* FSEC = 10^-15
NSEC = 10^-9 */
-#define FSEC_PER_NSEC 1000000L
+#define FSEC_PER_NSEC 1000000L
+
+#define HPET_DEV_USED_BIT 2
+#define HPET_DEV_USED (1 << HPET_DEV_USED_BIT)
+#define HPET_DEV_VALID 0x8
+#define HPET_DEV_FSB_CAP 0x1000
+#define HPET_DEV_PERI_CAP 0x2000
+
+#define EVT_TO_HPET_DEV(evt) container_of(evt, struct hpet_dev, evt)
/*
* HPET address is set in acpi/boot.c, when an ACPI entry exists
*/
-unsigned long hpet_address;
-static void __iomem *hpet_virt_address;
+unsigned long hpet_address;
+unsigned long hpet_num_timers;
+static void __iomem *hpet_virt_address;
+
+struct hpet_dev {
+ struct clock_event_device evt;
+ unsigned int num;
+ int cpu;
+ unsigned int irq;
+ unsigned int flags;
+ char name[10];
+};
unsigned long hpet_readl(unsigned long a)
{
@@ -59,7 +79,7 @@ static inline void hpet_clear_mapping(void)
static int boot_hpet_disable;
int hpet_force_user;
-static int __init hpet_setup(char* str)
+static int __init hpet_setup(char *str)
{
if (str) {
if (!strncmp("disable", str, 7))
@@ -80,7 +100,7 @@ __setup("nohpet", disable_hpet);
static inline int is_hpet_capable(void)
{
- return (!boot_hpet_disable && hpet_address);
+ return !boot_hpet_disable && hpet_address;
}
/*
@@ -102,6 +122,9 @@ EXPORT_SYMBOL_GPL(is_hpet_enabled);
* timer 0 and timer 1 in case of RTC emulation.
*/
#ifdef CONFIG_HPET
+
+static void hpet_reserve_msi_timers(struct hpet_data *hd);
+
static void hpet_reserve_platform_timers(unsigned long id)
{
struct hpet __iomem *hpet = hpet_virt_address;
@@ -111,10 +134,10 @@ static void hpet_reserve_platform_timers(unsigned long id)
nrtimers = ((id & HPET_ID_NUMBER) >> HPET_ID_NUMBER_SHIFT) + 1;
- memset(&hd, 0, sizeof (hd));
- hd.hd_phys_address = hpet_address;
- hd.hd_address = hpet;
- hd.hd_nirqs = nrtimers;
+ memset(&hd, 0, sizeof(hd));
+ hd.hd_phys_address = hpet_address;
+ hd.hd_address = hpet;
+ hd.hd_nirqs = nrtimers;
hpet_reserve_timer(&hd, 0);
#ifdef CONFIG_HPET_EMULATE_RTC
@@ -130,10 +153,12 @@ static void hpet_reserve_platform_timers(unsigned long id)
hd.hd_irq[1] = HPET_LEGACY_RTC;
for (i = 2; i < nrtimers; timer++, i++) {
- hd.hd_irq[i] = (readl(&timer->hpet_config) & Tn_INT_ROUTE_CNF_MASK) >>
- Tn_INT_ROUTE_CNF_SHIFT;
+ hd.hd_irq[i] = (readl(&timer->hpet_config) &
+ Tn_INT_ROUTE_CNF_MASK) >> Tn_INT_ROUTE_CNF_SHIFT;
}
+ hpet_reserve_msi_timers(&hd);
+
hpet_alloc(&hd);
}
@@ -227,60 +252,70 @@ static void hpet_legacy_clockevent_register(void)
printk(KERN_DEBUG "hpet clockevent registered\n");
}
-static void hpet_legacy_set_mode(enum clock_event_mode mode,
- struct clock_event_device *evt)
+static int hpet_setup_msi_irq(unsigned int irq);
+
+static void hpet_set_mode(enum clock_event_mode mode,
+ struct clock_event_device *evt, int timer)
{
unsigned long cfg, cmp, now;
uint64_t delta;
- switch(mode) {
+ switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
- delta = ((uint64_t)(NSEC_PER_SEC/HZ)) * hpet_clockevent.mult;
- delta >>= hpet_clockevent.shift;
+ delta = ((uint64_t)(NSEC_PER_SEC/HZ)) * evt->mult;
+ delta >>= evt->shift;
now = hpet_readl(HPET_COUNTER);
cmp = now + (unsigned long) delta;
- cfg = hpet_readl(HPET_T0_CFG);
+ cfg = hpet_readl(HPET_Tn_CFG(timer));
cfg |= HPET_TN_ENABLE | HPET_TN_PERIODIC |
HPET_TN_SETVAL | HPET_TN_32BIT;
- hpet_writel(cfg, HPET_T0_CFG);
+ hpet_writel(cfg, HPET_Tn_CFG(timer));
/*
* The first write after writing TN_SETVAL to the
* config register sets the counter value, the second
* write sets the period.
*/
- hpet_writel(cmp, HPET_T0_CMP);
+ hpet_writel(cmp, HPET_Tn_CMP(timer));
udelay(1);
- hpet_writel((unsigned long) delta, HPET_T0_CMP);
+ hpet_writel((unsigned long) delta, HPET_Tn_CMP(timer));
break;
case CLOCK_EVT_MODE_ONESHOT:
- cfg = hpet_readl(HPET_T0_CFG);
+ cfg = hpet_readl(HPET_Tn_CFG(timer));
cfg &= ~HPET_TN_PERIODIC;
cfg |= HPET_TN_ENABLE | HPET_TN_32BIT;
- hpet_writel(cfg, HPET_T0_CFG);
+ hpet_writel(cfg, HPET_Tn_CFG(timer));
break;
case CLOCK_EVT_MODE_UNUSED:
case CLOCK_EVT_MODE_SHUTDOWN:
- cfg = hpet_readl(HPET_T0_CFG);
+ cfg = hpet_readl(HPET_Tn_CFG(timer));
cfg &= ~HPET_TN_ENABLE;
- hpet_writel(cfg, HPET_T0_CFG);
+ hpet_writel(cfg, HPET_Tn_CFG(timer));
break;
case CLOCK_EVT_MODE_RESUME:
- hpet_enable_legacy_int();
+ if (timer == 0) {
+ hpet_enable_legacy_int();
+ } else {
+ struct hpet_dev *hdev = EVT_TO_HPET_DEV(evt);
+ hpet_setup_msi_irq(hdev->irq);
+ disable_irq(hdev->irq);
+ irq_set_affinity(hdev->irq, cpumask_of_cpu(hdev->cpu));
+ enable_irq(hdev->irq);
+ }
break;
}
}
-static int hpet_legacy_next_event(unsigned long delta,
- struct clock_event_device *evt)
+static int hpet_next_event(unsigned long delta,
+ struct clock_event_device *evt, int timer)
{
u32 cnt;
cnt = hpet_readl(HPET_COUNTER);
cnt += (u32) delta;
- hpet_writel(cnt, HPET_T0_CMP);
+ hpet_writel(cnt, HPET_Tn_CMP(timer));
/*
* We need to read back the CMP register to make sure that
@@ -292,6 +327,347 @@ static int hpet_legacy_next_event(unsigned long delta,
return (s32)((u32)hpet_readl(HPET_COUNTER) - cnt) >= 0 ? -ETIME : 0;
}
+static void hpet_legacy_set_mode(enum clock_event_mode mode,
+ struct clock_event_device *evt)
+{
+ hpet_set_mode(mode, evt, 0);
+}
+
+static int hpet_legacy_next_event(unsigned long delta,
+ struct clock_event_device *evt)
+{
+ return hpet_next_event(delta, evt, 0);
+}
+
+/*
+ * HPET MSI Support
+ */
+#ifdef CONFIG_PCI_MSI
+
+static DEFINE_PER_CPU(struct hpet_dev *, cpu_hpet_dev);
+static struct hpet_dev *hpet_devs;
+
+void hpet_msi_unmask(unsigned int irq)
+{
+ struct hpet_dev *hdev = get_irq_data(irq);
+ unsigned long cfg;
+
+ /* unmask it */
+ cfg = hpet_readl(HPET_Tn_CFG(hdev->num));
+ cfg |= HPET_TN_FSB;
+ hpet_writel(cfg, HPET_Tn_CFG(hdev->num));
+}
+
+void hpet_msi_mask(unsigned int irq)
+{
+ unsigned long cfg;
+ struct hpet_dev *hdev = get_irq_data(irq);
+
+ /* mask it */
+ cfg = hpet_readl(HPET_Tn_CFG(hdev->num));
+ cfg &= ~HPET_TN_FSB;
+ hpet_writel(cfg, HPET_Tn_CFG(hdev->num));
+}
+
+void hpet_msi_write(unsigned int irq, struct msi_msg *msg)
+{
+ struct hpet_dev *hdev = get_irq_data(irq);
+
+ hpet_writel(msg->data, HPET_Tn_ROUTE(hdev->num));
+ hpet_writel(msg->address_lo, HPET_Tn_ROUTE(hdev->num) + 4);
+}
+
+void hpet_msi_read(unsigned int irq, struct msi_msg *msg)
+{
+ struct hpet_dev *hdev = get_irq_data(irq);
+
+ msg->data = hpet_readl(HPET_Tn_ROUTE(hdev->num));
+ msg->address_lo = hpet_readl(HPET_Tn_ROUTE(hdev->num) + 4);
+ msg->address_hi = 0;
+}
+
+static void hpet_msi_set_mode(enum clock_event_mode mode,
+ struct clock_event_device *evt)
+{
+ struct hpet_dev *hdev = EVT_TO_HPET_DEV(evt);
+ hpet_set_mode(mode, evt, hdev->num);
+}
+
+static int hpet_msi_next_event(unsigned long delta,
+ struct clock_event_device *evt)
+{
+ struct hpet_dev *hdev = EVT_TO_HPET_DEV(evt);
+ return hpet_next_event(delta, evt, hdev->num);
+}
+
+static int hpet_setup_msi_irq(unsigned int irq)
+{
+ if (arch_setup_hpet_msi(irq)) {
+ destroy_irq(irq);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int hpet_assign_irq(struct hpet_dev *dev)
+{
+ unsigned int irq;
+
+ irq = create_irq();
+ if (!irq)
+ return -EINVAL;
+
+ set_irq_data(irq, dev);
+
+ if (hpet_setup_msi_irq(irq))
+ return -EINVAL;
+
+ dev->irq = irq;
+ return 0;
+}
+
+static irqreturn_t hpet_interrupt_handler(int irq, void *data)
+{
+ struct hpet_dev *dev = (struct hpet_dev *)data;
+ struct clock_event_device *hevt = &dev->evt;
+
+ if (!hevt->event_handler) {
+ printk(KERN_INFO "Spurious HPET timer interrupt on HPET timer %d\n",
+ dev->num);
+ return IRQ_HANDLED;
+ }
+
+ hevt->event_handler(hevt);
+ return IRQ_HANDLED;
+}
+
+static int hpet_setup_irq(struct hpet_dev *dev)
+{
+
+ if (request_irq(dev->irq, hpet_interrupt_handler,
+ IRQF_SHARED|IRQF_NOBALANCING, dev->name, dev))
+ return -1;
+
+ disable_irq(dev->irq);
+ irq_set_affinity(dev->irq, cpumask_of_cpu(dev->cpu));
+ enable_irq(dev->irq);
+
+ printk(KERN_DEBUG "hpet: %s irq %d for MSI\n",
+ dev->name, dev->irq);
+
+ return 0;
+}
+
+/* This should be called in specific @cpu */
+static void init_one_hpet_msi_clockevent(struct hpet_dev *hdev, int cpu)
+{
+ struct clock_event_device *evt = &hdev->evt;
+ uint64_t hpet_freq;
+
+ WARN_ON(cpu != smp_processor_id());
+ if (!(hdev->flags & HPET_DEV_VALID))
+ return;
+
+ if (hpet_setup_msi_irq(hdev->irq))
+ return;
+
+ hdev->cpu = cpu;
+ per_cpu(cpu_hpet_dev, cpu) = hdev;
+ evt->name = hdev->name;
+ hpet_setup_irq(hdev);
+ evt->irq = hdev->irq;
+
+ evt->rating = 110;
+ evt->features = CLOCK_EVT_FEAT_ONESHOT;
+ if (hdev->flags & HPET_DEV_PERI_CAP)
+ evt->features |= CLOCK_EVT_FEAT_PERIODIC;
+
+ evt->set_mode = hpet_msi_set_mode;
+ evt->set_next_event = hpet_msi_next_event;
+ evt->shift = 32;
+
+ /*
+ * The period is a femto seconds value. We need to calculate the
+ * scaled math multiplication factor for nanosecond to hpet tick
+ * conversion.
+ */
+ hpet_freq = 1000000000000000ULL;
+ do_div(hpet_freq, hpet_period);
+ evt->mult = div_sc((unsigned long) hpet_freq,
+ NSEC_PER_SEC, evt->shift);
+ /* Calculate the max delta */
+ evt->max_delta_ns = clockevent_delta2ns(0x7FFFFFFF, evt);
+ /* 5 usec minimum reprogramming delta. */
+ evt->min_delta_ns = 5000;
+
+ evt->cpumask = cpumask_of_cpu(hdev->cpu);
+ clockevents_register_device(evt);
+}
+
+#ifdef CONFIG_HPET
+/* Reserve at least one timer for userspace (/dev/hpet) */
+#define RESERVE_TIMERS 1
+#else
+#define RESERVE_TIMERS 0
+#endif
+
+static void hpet_msi_capability_lookup(unsigned int start_timer)
+{
+ unsigned int id;
+ unsigned int num_timers;
+ unsigned int num_timers_used = 0;
+ int i;
+
+ id = hpet_readl(HPET_ID);
+
+ num_timers = ((id & HPET_ID_NUMBER) >> HPET_ID_NUMBER_SHIFT);
+ num_timers++; /* Value read out starts from 0 */
+
+ hpet_devs = kzalloc(sizeof(struct hpet_dev) * num_timers, GFP_KERNEL);
+ if (!hpet_devs)
+ return;
+
+ hpet_num_timers = num_timers;
+
+ for (i = start_timer; i < num_timers - RESERVE_TIMERS; i++) {
+ struct hpet_dev *hdev = &hpet_devs[num_timers_used];
+ unsigned long cfg = hpet_readl(HPET_Tn_CFG(i));
+
+ /* Only consider HPET timer with MSI support */
+ if (!(cfg & HPET_TN_FSB_CAP))
+ continue;
+
+ hdev->flags = 0;
+ if (cfg & HPET_TN_PERIODIC_CAP)
+ hdev->flags |= HPET_DEV_PERI_CAP;
+ hdev->num = i;
+
+ sprintf(hdev->name, "hpet%d", i);
+ if (hpet_assign_irq(hdev))
+ continue;
+
+ hdev->flags |= HPET_DEV_FSB_CAP;
+ hdev->flags |= HPET_DEV_VALID;
+ num_timers_used++;
+ if (num_timers_used == num_possible_cpus())
+ break;
+ }
+
+ printk(KERN_INFO "HPET: %d timers in total, %d timers will be used for per-cpu timer\n",
+ num_timers, num_timers_used);
+}
+
+#ifdef CONFIG_HPET
+static void hpet_reserve_msi_timers(struct hpet_data *hd)
+{
+ int i;
+
+ if (!hpet_devs)
+ return;
+
+ for (i = 0; i < hpet_num_timers; i++) {
+ struct hpet_dev *hdev = &hpet_devs[i];
+
+ if (!(hdev->flags & HPET_DEV_VALID))
+ continue;
+
+ hd->hd_irq[hdev->num] = hdev->irq;
+ hpet_reserve_timer(hd, hdev->num);
+ }
+}
+#endif
+
+static struct hpet_dev *hpet_get_unused_timer(void)
+{
+ int i;
+
+ if (!hpet_devs)
+ return NULL;
+
+ for (i = 0; i < hpet_num_timers; i++) {
+ struct hpet_dev *hdev = &hpet_devs[i];
+
+ if (!(hdev->flags & HPET_DEV_VALID))
+ continue;
+ if (test_and_set_bit(HPET_DEV_USED_BIT,
+ (unsigned long *)&hdev->flags))
+ continue;
+ return hdev;
+ }
+ return NULL;
+}
+
+struct hpet_work_struct {
+ struct delayed_work work;
+ struct completion complete;
+};
+
+static void hpet_work(struct work_struct *w)
+{
+ struct hpet_dev *hdev;
+ int cpu = smp_processor_id();
+ struct hpet_work_struct *hpet_work;
+
+ hpet_work = container_of(w, struct hpet_work_struct, work.work);
+
+ hdev = hpet_get_unused_timer();
+ if (hdev)
+ init_one_hpet_msi_clockevent(hdev, cpu);
+
+ complete(&hpet_work->complete);
+}
+
+static int hpet_cpuhp_notify(struct notifier_block *n,
+ unsigned long action, void *hcpu)
+{
+ unsigned long cpu = (unsigned long)hcpu;
+ struct hpet_work_struct work;
+ struct hpet_dev *hdev = per_cpu(cpu_hpet_dev, cpu);
+
+ switch (action & 0xf) {
+ case CPU_ONLINE:
+ INIT_DELAYED_WORK(&work.work, hpet_work);
+ init_completion(&work.complete);
+ /* FIXME: add schedule_work_on() */
+ schedule_delayed_work_on(cpu, &work.work, 0);
+ wait_for_completion(&work.complete);
+ break;
+ case CPU_DEAD:
+ if (hdev) {
+ free_irq(hdev->irq, hdev);
+ hdev->flags &= ~HPET_DEV_USED;
+ per_cpu(cpu_hpet_dev, cpu) = NULL;
+ }
+ break;
+ }
+ return NOTIFY_OK;
+}
+#else
+
+static int hpet_setup_msi_irq(unsigned int irq)
+{
+ return 0;
+}
+static void hpet_msi_capability_lookup(unsigned int start_timer)
+{
+ return;
+}
+
+#ifdef CONFIG_HPET
+static void hpet_reserve_msi_timers(struct hpet_data *hd)
+{
+ return;
+}
+#endif
+
+static int hpet_cpuhp_notify(struct notifier_block *n,
+ unsigned long action, void *hcpu)
+{
+ return NOTIFY_OK;
+}
+
+#endif
+
/*
* Clock source related code
*/
@@ -427,8 +803,10 @@ int __init hpet_enable(void)
if (id & HPET_ID_LEGSUP) {
hpet_legacy_clockevent_register();
+ hpet_msi_capability_lookup(2);
return 1;
}
+ hpet_msi_capability_lookup(0);
return 0;
out_nohpet:
@@ -445,6 +823,8 @@ out_nohpet:
*/
static __init int hpet_late_init(void)
{
+ int cpu;
+
if (boot_hpet_disable)
return -ENODEV;
@@ -460,6 +840,13 @@ static __init int hpet_late_init(void)
hpet_reserve_platform_timers(hpet_readl(HPET_ID));
+ for_each_online_cpu(cpu) {
+ hpet_cpuhp_notify(NULL, CPU_ONLINE, (void *)(long)cpu);
+ }
+
+ /* This notifier should be called after workqueue is ready */
+ hotcpu_notifier(hpet_cpuhp_notify, -20);
+
return 0;
}
fs_initcall(hpet_late_init);
diff --git a/arch/x86/kernel/io_apic_64.c b/arch/x86/kernel/io_apic.c
index 02063ae042f..b764d7429c6 100644
--- a/arch/x86/kernel/io_apic_64.c
+++ b/arch/x86/kernel/io_apic.c
@@ -27,17 +27,21 @@
#include <linux/sched.h>
#include <linux/pci.h>
#include <linux/mc146818rtc.h>
+#include <linux/compiler.h>
#include <linux/acpi.h>
+#include <linux/module.h>
#include <linux/sysdev.h>
#include <linux/msi.h>
#include <linux/htirq.h>
-#include <linux/dmar.h>
-#include <linux/jiffies.h>
+#include <linux/freezer.h>
+#include <linux/kthread.h>
+#include <linux/jiffies.h> /* time_after() */
#ifdef CONFIG_ACPI
#include <acpi/acpi_bus.h>
#endif
#include <linux/bootmem.h>
#include <linux/dmar.h>
+#include <linux/hpet.h>
#include <asm/idle.h>
#include <asm/io.h>
@@ -46,61 +50,28 @@
#include <asm/proto.h>
#include <asm/acpi.h>
#include <asm/dma.h>
+#include <asm/timer.h>
#include <asm/i8259.h>
#include <asm/nmi.h>
#include <asm/msidef.h>
#include <asm/hypertransport.h>
+#include <asm/setup.h>
#include <asm/irq_remapping.h>
+#include <asm/hpet.h>
+#include <asm/uv/uv_hub.h>
+#include <asm/uv/uv_irq.h>
#include <mach_ipi.h>
#include <mach_apic.h>
+#include <mach_apicdef.h>
#define __apicdebuginit(type) static type __init
-struct irq_cfg {
- cpumask_t domain;
- cpumask_t old_domain;
- unsigned move_cleanup_count;
- u8 vector;
- u8 move_in_progress : 1;
-};
-
-/* irq_cfg is indexed by the sum of all RTEs in all I/O APICs. */
-static struct irq_cfg irq_cfg[NR_IRQS] __read_mostly = {
- [0] = { .domain = CPU_MASK_ALL, .vector = IRQ0_VECTOR, },
- [1] = { .domain = CPU_MASK_ALL, .vector = IRQ1_VECTOR, },
- [2] = { .domain = CPU_MASK_ALL, .vector = IRQ2_VECTOR, },
- [3] = { .domain = CPU_MASK_ALL, .vector = IRQ3_VECTOR, },
- [4] = { .domain = CPU_MASK_ALL, .vector = IRQ4_VECTOR, },
- [5] = { .domain = CPU_MASK_ALL, .vector = IRQ5_VECTOR, },
- [6] = { .domain = CPU_MASK_ALL, .vector = IRQ6_VECTOR, },
- [7] = { .domain = CPU_MASK_ALL, .vector = IRQ7_VECTOR, },
- [8] = { .domain = CPU_MASK_ALL, .vector = IRQ8_VECTOR, },
- [9] = { .domain = CPU_MASK_ALL, .vector = IRQ9_VECTOR, },
- [10] = { .domain = CPU_MASK_ALL, .vector = IRQ10_VECTOR, },
- [11] = { .domain = CPU_MASK_ALL, .vector = IRQ11_VECTOR, },
- [12] = { .domain = CPU_MASK_ALL, .vector = IRQ12_VECTOR, },
- [13] = { .domain = CPU_MASK_ALL, .vector = IRQ13_VECTOR, },
- [14] = { .domain = CPU_MASK_ALL, .vector = IRQ14_VECTOR, },
- [15] = { .domain = CPU_MASK_ALL, .vector = IRQ15_VECTOR, },
-};
-
-static int assign_irq_vector(int irq, cpumask_t mask);
-
-int first_system_vector = 0xfe;
-
-char system_vectors[NR_VECTORS] = { [0 ... NR_VECTORS-1] = SYS_VECTOR_FREE};
-
-int sis_apic_bug; /* not actually supported, dummy for compile */
-
-static int no_timer_check;
-
-static int disable_timer_pin_1 __initdata;
-
-int timer_through_8259 __initdata;
-
-/* Where if anywhere is the i8259 connect in external int mode */
-static struct { int pin, apic; } ioapic_i8259 = { -1, -1 };
+/*
+ * Is the SiS APIC rmw bug present ?
+ * -1 = don't know, 0 = no, 1 = yes
+ */
+int sis_apic_bug = -1;
static DEFINE_SPINLOCK(ioapic_lock);
static DEFINE_SPINLOCK(vector_lock);
@@ -110,9 +81,6 @@ static DEFINE_SPINLOCK(vector_lock);
*/
int nr_ioapic_registers[MAX_IO_APICS];
-/* I/O APIC RTE contents at the OS boot up */
-struct IO_APIC_route_entry *early_ioapic_entries[MAX_IO_APICS];
-
/* I/O APIC entries */
struct mp_config_ioapic mp_ioapics[MAX_IO_APICS];
int nr_ioapics;
@@ -123,11 +91,69 @@ struct mp_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
/* # of MP IRQ source entries */
int mp_irq_entries;
+#if defined (CONFIG_MCA) || defined (CONFIG_EISA)
+int mp_bus_id_to_type[MAX_MP_BUSSES];
+#endif
+
DECLARE_BITMAP(mp_bus_not_pci, MAX_MP_BUSSES);
+int skip_ioapic_setup;
+
+static int __init parse_noapic(char *str)
+{
+ /* disable IO-APIC */
+ disable_ioapic_setup();
+ return 0;
+}
+early_param("noapic", parse_noapic);
+
+struct irq_pin_list;
+struct irq_cfg {
+ unsigned int irq;
+ struct irq_pin_list *irq_2_pin;
+ cpumask_t domain;
+ cpumask_t old_domain;
+ unsigned move_cleanup_count;
+ u8 vector;
+ u8 move_in_progress : 1;
+};
+
+/* irq_cfg is indexed by the sum of all RTEs in all I/O APICs. */
+static struct irq_cfg irq_cfgx[NR_IRQS] = {
+ [0] = { .irq = 0, .domain = CPU_MASK_ALL, .vector = IRQ0_VECTOR, },
+ [1] = { .irq = 1, .domain = CPU_MASK_ALL, .vector = IRQ1_VECTOR, },
+ [2] = { .irq = 2, .domain = CPU_MASK_ALL, .vector = IRQ2_VECTOR, },
+ [3] = { .irq = 3, .domain = CPU_MASK_ALL, .vector = IRQ3_VECTOR, },
+ [4] = { .irq = 4, .domain = CPU_MASK_ALL, .vector = IRQ4_VECTOR, },
+ [5] = { .irq = 5, .domain = CPU_MASK_ALL, .vector = IRQ5_VECTOR, },
+ [6] = { .irq = 6, .domain = CPU_MASK_ALL, .vector = IRQ6_VECTOR, },
+ [7] = { .irq = 7, .domain = CPU_MASK_ALL, .vector = IRQ7_VECTOR, },
+ [8] = { .irq = 8, .domain = CPU_MASK_ALL, .vector = IRQ8_VECTOR, },
+ [9] = { .irq = 9, .domain = CPU_MASK_ALL, .vector = IRQ9_VECTOR, },
+ [10] = { .irq = 10, .domain = CPU_MASK_ALL, .vector = IRQ10_VECTOR, },
+ [11] = { .irq = 11, .domain = CPU_MASK_ALL, .vector = IRQ11_VECTOR, },
+ [12] = { .irq = 12, .domain = CPU_MASK_ALL, .vector = IRQ12_VECTOR, },
+ [13] = { .irq = 13, .domain = CPU_MASK_ALL, .vector = IRQ13_VECTOR, },
+ [14] = { .irq = 14, .domain = CPU_MASK_ALL, .vector = IRQ14_VECTOR, },
+ [15] = { .irq = 15, .domain = CPU_MASK_ALL, .vector = IRQ15_VECTOR, },
+};
+
+#define for_each_irq_cfg(irq, cfg) \
+ for (irq = 0, cfg = irq_cfgx; irq < nr_irqs; irq++, cfg++)
+
+static struct irq_cfg *irq_cfg(unsigned int irq)
+{
+ return irq < nr_irqs ? irq_cfgx + irq : NULL;
+}
+
+static struct irq_cfg *irq_cfg_alloc(unsigned int irq)
+{
+ return irq_cfg(irq);
+}
+
/*
- * Rough estimation of how many shared IRQs there are, can
- * be changed anytime.
+ * Rough estimation of how many shared IRQs there are, can be changed
+ * anytime.
*/
#define MAX_PLUS_SHARED_IRQS NR_IRQS
#define PIN_MAP_SIZE (MAX_PLUS_SHARED_IRQS + NR_IRQS)
@@ -139,9 +165,36 @@ DECLARE_BITMAP(mp_bus_not_pci, MAX_MP_BUSSES);
* between pins and IRQs.
*/
-static struct irq_pin_list {
- short apic, pin, next;
-} irq_2_pin[PIN_MAP_SIZE];
+struct irq_pin_list {
+ int apic, pin;
+ struct irq_pin_list *next;
+};
+
+static struct irq_pin_list irq_2_pin_head[PIN_MAP_SIZE];
+static struct irq_pin_list *irq_2_pin_ptr;
+
+static void __init irq_2_pin_init(void)
+{
+ struct irq_pin_list *pin = irq_2_pin_head;
+ int i;
+
+ for (i = 1; i < PIN_MAP_SIZE; i++)
+ pin[i-1].next = &pin[i];
+
+ irq_2_pin_ptr = &pin[0];
+}
+
+static struct irq_pin_list *get_one_free_irq_2_pin(void)
+{
+ struct irq_pin_list *pin = irq_2_pin_ptr;
+
+ if (!pin)
+ panic("can not get more irq_2_pin\n");
+
+ irq_2_pin_ptr = pin->next;
+ pin->next = NULL;
+ return pin;
+}
struct io_apic {
unsigned int index;
@@ -172,10 +225,15 @@ static inline void io_apic_write(unsigned int apic, unsigned int reg, unsigned i
/*
* Re-write a value: to be used for read-modify-write
* cycles where the read already set up the index register.
+ *
+ * Older SiS APIC requires we rewrite the index register
*/
-static inline void io_apic_modify(unsigned int apic, unsigned int value)
+static inline void io_apic_modify(unsigned int apic, unsigned int reg, unsigned int value)
{
struct io_apic __iomem *io_apic = io_apic_base(apic);
+
+ if (sis_apic_bug)
+ writel(reg, &io_apic->index);
writel(value, &io_apic->data);
}
@@ -183,16 +241,17 @@ static bool io_apic_level_ack_pending(unsigned int irq)
{
struct irq_pin_list *entry;
unsigned long flags;
+ struct irq_cfg *cfg = irq_cfg(irq);
spin_lock_irqsave(&ioapic_lock, flags);
- entry = irq_2_pin + irq;
+ entry = cfg->irq_2_pin;
for (;;) {
unsigned int reg;
int pin;
- pin = entry->pin;
- if (pin == -1)
+ if (!entry)
break;
+ pin = entry->pin;
reg = io_apic_read(entry->apic, 0x10 + pin*2);
/* Is the remote IRR bit set? */
if (reg & IO_APIC_REDIR_REMOTE_IRR) {
@@ -201,45 +260,13 @@ static bool io_apic_level_ack_pending(unsigned int irq)
}
if (!entry->next)
break;
- entry = irq_2_pin + entry->next;
+ entry = entry->next;
}
spin_unlock_irqrestore(&ioapic_lock, flags);
return false;
}
-/*
- * Synchronize the IO-APIC and the CPU by doing
- * a dummy read from the IO-APIC
- */
-static inline void io_apic_sync(unsigned int apic)
-{
- struct io_apic __iomem *io_apic = io_apic_base(apic);
- readl(&io_apic->data);
-}
-
-#define __DO_ACTION(R, ACTION, FINAL) \
- \
-{ \
- int pin; \
- struct irq_pin_list *entry = irq_2_pin + irq; \
- \
- BUG_ON(irq >= NR_IRQS); \
- for (;;) { \
- unsigned int reg; \
- pin = entry->pin; \
- if (pin == -1) \
- break; \
- reg = io_apic_read(entry->apic, 0x10 + R + pin*2); \
- reg ACTION; \
- io_apic_modify(entry->apic, reg); \
- FINAL; \
- if (!entry->next) \
- break; \
- entry = irq_2_pin + entry->next; \
- } \
-}
-
union entry_union {
struct { u32 w1, w2; };
struct IO_APIC_route_entry entry;
@@ -299,59 +326,71 @@ static void ioapic_mask_entry(int apic, int pin)
static void __target_IO_APIC_irq(unsigned int irq, unsigned int dest, u8 vector)
{
int apic, pin;
- struct irq_pin_list *entry = irq_2_pin + irq;
+ struct irq_cfg *cfg;
+ struct irq_pin_list *entry;
- BUG_ON(irq >= NR_IRQS);
+ cfg = irq_cfg(irq);
+ entry = cfg->irq_2_pin;
for (;;) {
unsigned int reg;
+
+ if (!entry)
+ break;
+
apic = entry->apic;
pin = entry->pin;
- if (pin == -1)
- break;
+#ifdef CONFIG_INTR_REMAP
/*
* With interrupt-remapping, destination information comes
* from interrupt-remapping table entry.
*/
if (!irq_remapped(irq))
io_apic_write(apic, 0x11 + pin*2, dest);
+#else
+ io_apic_write(apic, 0x11 + pin*2, dest);
+#endif
reg = io_apic_read(apic, 0x10 + pin*2);
reg &= ~IO_APIC_REDIR_VECTOR_MASK;
reg |= vector;
- io_apic_modify(apic, reg);
+ io_apic_modify(apic, 0x10 + pin*2, reg);
if (!entry->next)
break;
- entry = irq_2_pin + entry->next;
+ entry = entry->next;
}
}
+static int assign_irq_vector(int irq, cpumask_t mask);
+
static void set_ioapic_affinity_irq(unsigned int irq, cpumask_t mask)
{
- struct irq_cfg *cfg = irq_cfg + irq;
+ struct irq_cfg *cfg;
unsigned long flags;
unsigned int dest;
cpumask_t tmp;
+ struct irq_desc *desc;
cpus_and(tmp, mask, cpu_online_map);
if (cpus_empty(tmp))
return;
+ cfg = irq_cfg(irq);
if (assign_irq_vector(irq, mask))
return;
cpus_and(tmp, cfg->domain, mask);
dest = cpu_mask_to_apicid(tmp);
-
/*
* Only the high 8 bits are valid.
*/
dest = SET_APIC_LOGICAL_ID(dest);
+ desc = irq_to_desc(irq);
spin_lock_irqsave(&ioapic_lock, flags);
__target_IO_APIC_irq(irq, dest, cfg->vector);
- irq_desc[irq].affinity = mask;
+ desc->affinity = mask;
spin_unlock_irqrestore(&ioapic_lock, flags);
}
-#endif
+#endif /* CONFIG_SMP */
/*
* The common case is 1:1 IRQ<->pin mappings. Sometimes there are
@@ -360,19 +399,30 @@ static void set_ioapic_affinity_irq(unsigned int irq, cpumask_t mask)
*/
static void add_pin_to_irq(unsigned int irq, int apic, int pin)
{
- static int first_free_entry = NR_IRQS;
- struct irq_pin_list *entry = irq_2_pin + irq;
+ struct irq_cfg *cfg;
+ struct irq_pin_list *entry;
+
+ /* first time to refer irq_cfg, so with new */
+ cfg = irq_cfg_alloc(irq);
+ entry = cfg->irq_2_pin;
+ if (!entry) {
+ entry = get_one_free_irq_2_pin();
+ cfg->irq_2_pin = entry;
+ entry->apic = apic;
+ entry->pin = pin;
+ return;
+ }
- BUG_ON(irq >= NR_IRQS);
- while (entry->next)
- entry = irq_2_pin + entry->next;
+ while (entry->next) {
+ /* not again, please */
+ if (entry->apic == apic && entry->pin == pin)
+ return;
- if (entry->pin != -1) {
- entry->next = first_free_entry;
- entry = irq_2_pin + entry->next;
- if (++first_free_entry >= PIN_MAP_SIZE)
- panic("io_apic.c: ran out of irq_2_pin entries!");
+ entry = entry->next;
}
+
+ entry->next = get_one_free_irq_2_pin();
+ entry = entry->next;
entry->apic = apic;
entry->pin = pin;
}
@@ -384,30 +434,86 @@ static void __init replace_pin_at_irq(unsigned int irq,
int oldapic, int oldpin,
int newapic, int newpin)
{
- struct irq_pin_list *entry = irq_2_pin + irq;
+ struct irq_cfg *cfg = irq_cfg(irq);
+ struct irq_pin_list *entry = cfg->irq_2_pin;
+ int replaced = 0;
- while (1) {
+ while (entry) {
if (entry->apic == oldapic && entry->pin == oldpin) {
entry->apic = newapic;
entry->pin = newpin;
- }
- if (!entry->next)
+ replaced = 1;
+ /* every one is different, right? */
break;
- entry = irq_2_pin + entry->next;
+ }
+ entry = entry->next;
+ }
+
+ /* why? call replace before add? */
+ if (!replaced)
+ add_pin_to_irq(irq, newapic, newpin);
+}
+
+static inline void io_apic_modify_irq(unsigned int irq,
+ int mask_and, int mask_or,
+ void (*final)(struct irq_pin_list *entry))
+{
+ int pin;
+ struct irq_cfg *cfg;
+ struct irq_pin_list *entry;
+
+ cfg = irq_cfg(irq);
+ for (entry = cfg->irq_2_pin; entry != NULL; entry = entry->next) {
+ unsigned int reg;
+ pin = entry->pin;
+ reg = io_apic_read(entry->apic, 0x10 + pin * 2);
+ reg &= mask_and;
+ reg |= mask_or;
+ io_apic_modify(entry->apic, 0x10 + pin * 2, reg);
+ if (final)
+ final(entry);
}
}
+static void __unmask_IO_APIC_irq(unsigned int irq)
+{
+ io_apic_modify_irq(irq, ~IO_APIC_REDIR_MASKED, 0, NULL);
+}
-#define DO_ACTION(name,R,ACTION, FINAL) \
- \
- static void name##_IO_APIC_irq (unsigned int irq) \
- __DO_ACTION(R, ACTION, FINAL)
+#ifdef CONFIG_X86_64
+void io_apic_sync(struct irq_pin_list *entry)
+{
+ /*
+ * Synchronize the IO-APIC and the CPU by doing
+ * a dummy read from the IO-APIC
+ */
+ struct io_apic __iomem *io_apic;
+ io_apic = io_apic_base(entry->apic);
+ readl(&io_apic->data);
+}
-/* mask = 1 */
-DO_ACTION(__mask, 0, |= IO_APIC_REDIR_MASKED, io_apic_sync(entry->apic))
+static void __mask_IO_APIC_irq(unsigned int irq)
+{
+ io_apic_modify_irq(irq, ~0, IO_APIC_REDIR_MASKED, &io_apic_sync);
+}
+#else /* CONFIG_X86_32 */
+static void __mask_IO_APIC_irq(unsigned int irq)
+{
+ io_apic_modify_irq(irq, ~0, IO_APIC_REDIR_MASKED, NULL);
+}
-/* mask = 0 */
-DO_ACTION(__unmask, 0, &= ~IO_APIC_REDIR_MASKED, )
+static void __mask_and_edge_IO_APIC_irq(unsigned int irq)
+{
+ io_apic_modify_irq(irq, ~IO_APIC_REDIR_LEVEL_TRIGGER,
+ IO_APIC_REDIR_MASKED, NULL);
+}
+
+static void __unmask_and_level_IO_APIC_irq(unsigned int irq)
+{
+ io_apic_modify_irq(irq, ~IO_APIC_REDIR_MASKED,
+ IO_APIC_REDIR_LEVEL_TRIGGER, NULL);
+}
+#endif /* CONFIG_X86_32 */
static void mask_IO_APIC_irq (unsigned int irq)
{
@@ -450,6 +556,68 @@ static void clear_IO_APIC (void)
clear_IO_APIC_pin(apic, pin);
}
+#if !defined(CONFIG_SMP) && defined(CONFIG_X86_32)
+void send_IPI_self(int vector)
+{
+ unsigned int cfg;
+
+ /*
+ * Wait for idle.
+ */
+ apic_wait_icr_idle();
+ cfg = APIC_DM_FIXED | APIC_DEST_SELF | vector | APIC_DEST_LOGICAL;
+ /*
+ * Send the IPI. The write to APIC_ICR fires this off.
+ */
+ apic_write(APIC_ICR, cfg);
+}
+#endif /* !CONFIG_SMP && CONFIG_X86_32*/
+
+#ifdef CONFIG_X86_32
+/*
+ * support for broken MP BIOSs, enables hand-redirection of PIRQ0-7 to
+ * specific CPU-side IRQs.
+ */
+
+#define MAX_PIRQS 8
+static int pirq_entries [MAX_PIRQS];
+static int pirqs_enabled;
+
+static int __init ioapic_pirq_setup(char *str)
+{
+ int i, max;
+ int ints[MAX_PIRQS+1];
+
+ get_options(str, ARRAY_SIZE(ints), ints);
+
+ for (i = 0; i < MAX_PIRQS; i++)
+ pirq_entries[i] = -1;
+
+ pirqs_enabled = 1;
+ apic_printk(APIC_VERBOSE, KERN_INFO
+ "PIRQ redirection, working around broken MP-BIOS.\n");
+ max = MAX_PIRQS;
+ if (ints[0] < MAX_PIRQS)
+ max = ints[0];
+
+ for (i = 0; i < max; i++) {
+ apic_printk(APIC_VERBOSE, KERN_DEBUG
+ "... PIRQ%d -> IRQ %d\n", i, ints[i+1]);
+ /*
+ * PIRQs are mapped upside down, usually.
+ */
+ pirq_entries[MAX_PIRQS-i-1] = ints[i+1];
+ }
+ return 1;
+}
+
+__setup("pirq=", ioapic_pirq_setup);
+#endif /* CONFIG_X86_32 */
+
+#ifdef CONFIG_INTR_REMAP
+/* I/O APIC RTE contents at the OS boot up */
+static struct IO_APIC_route_entry *early_ioapic_entries[MAX_IO_APICS];
+
/*
* Saves and masks all the unmasked IO-APIC RTE's
*/
@@ -474,7 +642,7 @@ int save_mask_IO_APIC_setup(void)
kzalloc(sizeof(struct IO_APIC_route_entry) *
nr_ioapic_registers[apic], GFP_KERNEL);
if (!early_ioapic_entries[apic])
- return -ENOMEM;
+ goto nomem;
}
for (apic = 0; apic < nr_ioapics; apic++)
@@ -488,17 +656,31 @@ int save_mask_IO_APIC_setup(void)
ioapic_write_entry(apic, pin, entry);
}
}
+
return 0;
+
+nomem:
+ while (apic >= 0)
+ kfree(early_ioapic_entries[apic--]);
+ memset(early_ioapic_entries, 0,
+ ARRAY_SIZE(early_ioapic_entries));
+
+ return -ENOMEM;
}
void restore_IO_APIC_setup(void)
{
int apic, pin;
- for (apic = 0; apic < nr_ioapics; apic++)
+ for (apic = 0; apic < nr_ioapics; apic++) {
+ if (!early_ioapic_entries[apic])
+ break;
for (pin = 0; pin < nr_ioapic_registers[apic]; pin++)
ioapic_write_entry(apic, pin,
early_ioapic_entries[apic][pin]);
+ kfree(early_ioapic_entries[apic]);
+ early_ioapic_entries[apic] = NULL;
+ }
}
void reinit_intr_remapped_IO_APIC(int intr_remapping)
@@ -512,25 +694,7 @@ void reinit_intr_remapped_IO_APIC(int intr_remapping)
*/
restore_IO_APIC_setup();
}
-
-int skip_ioapic_setup;
-int ioapic_force;
-
-static int __init parse_noapic(char *str)
-{
- disable_ioapic_setup();
- return 0;
-}
-early_param("noapic", parse_noapic);
-
-/* Actually the next is obsolete, but keep it for paranoid reasons -AK */
-static int __init disable_timer_pin_setup(char *arg)
-{
- disable_timer_pin_1 = 1;
- return 1;
-}
-__setup("disable_timer_pin_1", disable_timer_pin_setup);
-
+#endif
/*
* Find the IRQ entry number of a certain pin.
@@ -634,22 +798,54 @@ int IO_APIC_get_PCI_irq_vector(int bus, int slot, int pin)
best_guess = irq;
}
}
- BUG_ON(best_guess >= NR_IRQS);
return best_guess;
}
+EXPORT_SYMBOL(IO_APIC_get_PCI_irq_vector);
+
+#if defined(CONFIG_EISA) || defined(CONFIG_MCA)
+/*
+ * EISA Edge/Level control register, ELCR
+ */
+static int EISA_ELCR(unsigned int irq)
+{
+ if (irq < 16) {
+ unsigned int port = 0x4d0 + (irq >> 3);
+ return (inb(port) >> (irq & 7)) & 1;
+ }
+ apic_printk(APIC_VERBOSE, KERN_INFO
+ "Broken MPtable reports ISA irq %d\n", irq);
+ return 0;
+}
+
+#endif
+
/* ISA interrupts are always polarity zero edge triggered,
* when listed as conforming in the MP table. */
#define default_ISA_trigger(idx) (0)
#define default_ISA_polarity(idx) (0)
+/* EISA interrupts are always polarity zero and can be edge or level
+ * trigger depending on the ELCR value. If an interrupt is listed as
+ * EISA conforming in the MP table, that means its trigger type must
+ * be read in from the ELCR */
+
+#define default_EISA_trigger(idx) (EISA_ELCR(mp_irqs[idx].mp_srcbusirq))
+#define default_EISA_polarity(idx) default_ISA_polarity(idx)
+
/* PCI interrupts are always polarity one level triggered,
* when listed as conforming in the MP table. */
#define default_PCI_trigger(idx) (1)
#define default_PCI_polarity(idx) (1)
+/* MCA interrupts are always polarity zero level triggered,
+ * when listed as conforming in the MP table. */
+
+#define default_MCA_trigger(idx) (1)
+#define default_MCA_polarity(idx) default_ISA_polarity(idx)
+
static int MPBIOS_polarity(int idx)
{
int bus = mp_irqs[idx].mp_srcbus;
@@ -707,6 +903,36 @@ static int MPBIOS_trigger(int idx)
trigger = default_ISA_trigger(idx);
else
trigger = default_PCI_trigger(idx);
+#if defined(CONFIG_EISA) || defined(CONFIG_MCA)
+ switch (mp_bus_id_to_type[bus]) {
+ case MP_BUS_ISA: /* ISA pin */
+ {
+ /* set before the switch */
+ break;
+ }
+ case MP_BUS_EISA: /* EISA pin */
+ {
+ trigger = default_EISA_trigger(idx);
+ break;
+ }
+ case MP_BUS_PCI: /* PCI pin */
+ {
+ /* set before the switch */
+ break;
+ }
+ case MP_BUS_MCA: /* MCA pin */
+ {
+ trigger = default_MCA_trigger(idx);
+ break;
+ }
+ default:
+ {
+ printk(KERN_WARNING "broken BIOS!!\n");
+ trigger = 1;
+ break;
+ }
+ }
+#endif
break;
case 1: /* edge */
{
@@ -744,6 +970,7 @@ static inline int irq_trigger(int idx)
return MPBIOS_trigger(idx);
}
+int (*ioapic_renumber_irq)(int ioapic, int irq);
static int pin_2_irq(int idx, int apic, int pin)
{
int irq, i;
@@ -765,8 +992,32 @@ static int pin_2_irq(int idx, int apic, int pin)
while (i < apic)
irq += nr_ioapic_registers[i++];
irq += pin;
+ /*
+ * For MPS mode, so far only needed by ES7000 platform
+ */
+ if (ioapic_renumber_irq)
+ irq = ioapic_renumber_irq(apic, irq);
}
- BUG_ON(irq >= NR_IRQS);
+
+#ifdef CONFIG_X86_32
+ /*
+ * PCI IRQ command line redirection. Yes, limits are hardcoded.
+ */
+ if ((pin >= 16) && (pin <= 23)) {
+ if (pirq_entries[pin-16] != -1) {
+ if (!pirq_entries[pin-16]) {
+ apic_printk(APIC_VERBOSE, KERN_DEBUG
+ "disabling PIRQ%d\n", pin-16);
+ } else {
+ irq = pirq_entries[pin-16];
+ apic_printk(APIC_VERBOSE, KERN_DEBUG
+ "using PIRQ%d -> IRQ %d\n",
+ pin-16, irq);
+ }
+ }
+ }
+#endif
+
return irq;
}
@@ -801,8 +1052,7 @@ static int __assign_irq_vector(int irq, cpumask_t mask)
int cpu;
struct irq_cfg *cfg;
- BUG_ON((unsigned)irq >= NR_IRQS);
- cfg = &irq_cfg[irq];
+ cfg = irq_cfg(irq);
/* Only try and allocate irqs on cpus that are present */
cpus_and(mask, mask, cpu_online_map);
@@ -837,8 +1087,13 @@ next:
}
if (unlikely(current_vector == vector))
continue;
+#ifdef CONFIG_X86_64
if (vector == IA32_SYSCALL_VECTOR)
goto next;
+#else
+ if (vector == SYSCALL_VECTOR)
+ goto next;
+#endif
for_each_cpu_mask_nr(new_cpu, new_mask)
if (per_cpu(vector_irq, new_cpu)[vector] != -1)
goto next;
@@ -875,8 +1130,7 @@ static void __clear_irq_vector(int irq)
cpumask_t mask;
int cpu, vector;
- BUG_ON((unsigned)irq >= NR_IRQS);
- cfg = &irq_cfg[irq];
+ cfg = irq_cfg(irq);
BUG_ON(!cfg->vector);
vector = cfg->vector;
@@ -893,12 +1147,13 @@ void __setup_vector_irq(int cpu)
/* Initialize vector_irq on a new cpu */
/* This function must be called with vector_lock held */
int irq, vector;
+ struct irq_cfg *cfg;
/* Mark the inuse vectors */
- for (irq = 0; irq < NR_IRQS; ++irq) {
- if (!cpu_isset(cpu, irq_cfg[irq].domain))
+ for_each_irq_cfg(irq, cfg) {
+ if (!cpu_isset(cpu, cfg->domain))
continue;
- vector = irq_cfg[irq].vector;
+ vector = cfg->vector;
per_cpu(vector_irq, cpu)[vector] = irq;
}
/* Mark the free vectors */
@@ -906,7 +1161,9 @@ void __setup_vector_irq(int cpu)
irq = per_cpu(vector_irq, cpu)[vector];
if (irq < 0)
continue;
- if (!cpu_isset(cpu, irq_cfg[irq].domain))
+
+ cfg = irq_cfg(irq);
+ if (!cpu_isset(cpu, cfg->domain))
per_cpu(vector_irq, cpu)[vector] = -1;
}
}
@@ -916,16 +1173,49 @@ static struct irq_chip ioapic_chip;
static struct irq_chip ir_ioapic_chip;
#endif
+#define IOAPIC_AUTO -1
+#define IOAPIC_EDGE 0
+#define IOAPIC_LEVEL 1
+
+#ifdef CONFIG_X86_32
+static inline int IO_APIC_irq_trigger(int irq)
+{
+ int apic, idx, pin;
+
+ for (apic = 0; apic < nr_ioapics; apic++) {
+ for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) {
+ idx = find_irq_entry(apic, pin, mp_INT);
+ if ((idx != -1) && (irq == pin_2_irq(idx, apic, pin)))
+ return irq_trigger(idx);
+ }
+ }
+ /*
+ * nonexistent IRQs are edge default
+ */
+ return 0;
+}
+#else
+static inline int IO_APIC_irq_trigger(int irq)
+{
+ return 1;
+}
+#endif
+
static void ioapic_register_intr(int irq, unsigned long trigger)
{
- if (trigger)
- irq_desc[irq].status |= IRQ_LEVEL;
+ struct irq_desc *desc;
+
+ desc = irq_to_desc(irq);
+
+ if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) ||
+ trigger == IOAPIC_LEVEL)
+ desc->status |= IRQ_LEVEL;
else
- irq_desc[irq].status &= ~IRQ_LEVEL;
+ desc->status &= ~IRQ_LEVEL;
#ifdef CONFIG_INTR_REMAP
if (irq_remapped(irq)) {
- irq_desc[irq].status |= IRQ_MOVE_PCNTXT;
+ desc->status |= IRQ_MOVE_PCNTXT;
if (trigger)
set_irq_chip_and_handler_name(irq, &ir_ioapic_chip,
handle_fasteoi_irq,
@@ -936,7 +1226,8 @@ static void ioapic_register_intr(int irq, unsigned long trigger)
return;
}
#endif
- if (trigger)
+ if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) ||
+ trigger == IOAPIC_LEVEL)
set_irq_chip_and_handler_name(irq, &ioapic_chip,
handle_fasteoi_irq,
"fasteoi");
@@ -1009,13 +1300,15 @@ static int setup_ioapic_entry(int apic, int irq,
static void setup_IO_APIC_irq(int apic, int pin, unsigned int irq,
int trigger, int polarity)
{
- struct irq_cfg *cfg = irq_cfg + irq;
+ struct irq_cfg *cfg;
struct IO_APIC_route_entry entry;
cpumask_t mask;
if (!IO_APIC_IRQ(irq))
return;
+ cfg = irq_cfg(irq);
+
mask = TARGET_CPUS;
if (assign_irq_vector(irq, mask))
return;
@@ -1047,37 +1340,49 @@ static void setup_IO_APIC_irq(int apic, int pin, unsigned int irq,
static void __init setup_IO_APIC_irqs(void)
{
- int apic, pin, idx, irq, first_notcon = 1;
+ int apic, pin, idx, irq;
+ int notcon = 0;
apic_printk(APIC_VERBOSE, KERN_DEBUG "init IO_APIC IRQs\n");
for (apic = 0; apic < nr_ioapics; apic++) {
- for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) {
-
- idx = find_irq_entry(apic,pin,mp_INT);
- if (idx == -1) {
- if (first_notcon) {
- apic_printk(APIC_VERBOSE, KERN_DEBUG " IO-APIC (apicid-pin) %d-%d", mp_ioapics[apic].mp_apicid, pin);
- first_notcon = 0;
- } else
- apic_printk(APIC_VERBOSE, ", %d-%d", mp_ioapics[apic].mp_apicid, pin);
- continue;
- }
- if (!first_notcon) {
- apic_printk(APIC_VERBOSE, " not connected.\n");
- first_notcon = 1;
- }
+ for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) {
- irq = pin_2_irq(idx, apic, pin);
- add_pin_to_irq(irq, apic, pin);
+ idx = find_irq_entry(apic, pin, mp_INT);
+ if (idx == -1) {
+ if (!notcon) {
+ notcon = 1;
+ apic_printk(APIC_VERBOSE,
+ KERN_DEBUG " %d-%d",
+ mp_ioapics[apic].mp_apicid,
+ pin);
+ } else
+ apic_printk(APIC_VERBOSE, " %d-%d",
+ mp_ioapics[apic].mp_apicid,
+ pin);
+ continue;
+ }
+ if (notcon) {
+ apic_printk(APIC_VERBOSE,
+ " (apicid-pin) not connected\n");
+ notcon = 0;
+ }
- setup_IO_APIC_irq(apic, pin, irq,
- irq_trigger(idx), irq_polarity(idx));
- }
+ irq = pin_2_irq(idx, apic, pin);
+#ifdef CONFIG_X86_32
+ if (multi_timer_check(apic, irq))
+ continue;
+#endif
+ add_pin_to_irq(irq, apic, pin);
+
+ setup_IO_APIC_irq(apic, pin, irq,
+ irq_trigger(idx), irq_polarity(idx));
+ }
}
- if (!first_notcon)
- apic_printk(APIC_VERBOSE, " not connected.\n");
+ if (notcon)
+ apic_printk(APIC_VERBOSE,
+ " (apicid-pin) not connected\n");
}
/*
@@ -1088,8 +1393,10 @@ static void __init setup_timer_IRQ0_pin(unsigned int apic, unsigned int pin,
{
struct IO_APIC_route_entry entry;
+#ifdef CONFIG_INTR_REMAP
if (intr_remapping_enabled)
return;
+#endif
memset(&entry, 0, sizeof(entry));
@@ -1124,7 +1431,10 @@ __apicdebuginit(void) print_IO_APIC(void)
union IO_APIC_reg_00 reg_00;
union IO_APIC_reg_01 reg_01;
union IO_APIC_reg_02 reg_02;
+ union IO_APIC_reg_03 reg_03;
unsigned long flags;
+ struct irq_cfg *cfg;
+ unsigned int irq;
if (apic_verbosity == APIC_QUIET)
return;
@@ -1147,12 +1457,16 @@ __apicdebuginit(void) print_IO_APIC(void)
reg_01.raw = io_apic_read(apic, 1);
if (reg_01.bits.version >= 0x10)
reg_02.raw = io_apic_read(apic, 2);
+ if (reg_01.bits.version >= 0x20)
+ reg_03.raw = io_apic_read(apic, 3);
spin_unlock_irqrestore(&ioapic_lock, flags);
printk("\n");
printk(KERN_DEBUG "IO APIC #%d......\n", mp_ioapics[apic].mp_apicid);
printk(KERN_DEBUG ".... register #00: %08X\n", reg_00.raw);
printk(KERN_DEBUG "....... : physical APIC id: %02X\n", reg_00.bits.ID);
+ printk(KERN_DEBUG "....... : Delivery Type: %X\n", reg_00.bits.delivery_type);
+ printk(KERN_DEBUG "....... : LTS : %X\n", reg_00.bits.LTS);
printk(KERN_DEBUG ".... register #01: %08X\n", *(int *)&reg_01);
printk(KERN_DEBUG "....... : max redirection entries: %04X\n", reg_01.bits.entries);
@@ -1160,11 +1474,27 @@ __apicdebuginit(void) print_IO_APIC(void)
printk(KERN_DEBUG "....... : PRQ implemented: %X\n", reg_01.bits.PRQ);
printk(KERN_DEBUG "....... : IO APIC version: %04X\n", reg_01.bits.version);
- if (reg_01.bits.version >= 0x10) {
+ /*
+ * Some Intel chipsets with IO APIC VERSION of 0x1? don't have reg_02,
+ * but the value of reg_02 is read as the previous read register
+ * value, so ignore it if reg_02 == reg_01.
+ */
+ if (reg_01.bits.version >= 0x10 && reg_02.raw != reg_01.raw) {
printk(KERN_DEBUG ".... register #02: %08X\n", reg_02.raw);
printk(KERN_DEBUG "....... : arbitration: %02X\n", reg_02.bits.arbitration);
}
+ /*
+ * Some Intel chipsets with IO APIC VERSION of 0x2? don't have reg_02
+ * or reg_03, but the value of reg_0[23] is read as the previous read
+ * register value, so ignore it if reg_03 == reg_0[12].
+ */
+ if (reg_01.bits.version >= 0x20 && reg_03.raw != reg_02.raw &&
+ reg_03.raw != reg_01.raw) {
+ printk(KERN_DEBUG ".... register #03: %08X\n", reg_03.raw);
+ printk(KERN_DEBUG "....... : Boot DT : %X\n", reg_03.bits.boot_DT);
+ }
+
printk(KERN_DEBUG ".... IRQ redirection table:\n");
printk(KERN_DEBUG " NR Dst Mask Trig IRR Pol"
@@ -1193,16 +1523,16 @@ __apicdebuginit(void) print_IO_APIC(void)
}
}
printk(KERN_DEBUG "IRQ to pin mappings:\n");
- for (i = 0; i < NR_IRQS; i++) {
- struct irq_pin_list *entry = irq_2_pin + i;
- if (entry->pin < 0)
+ for_each_irq_cfg(irq, cfg) {
+ struct irq_pin_list *entry = cfg->irq_2_pin;
+ if (!entry)
continue;
- printk(KERN_DEBUG "IRQ%d ", i);
+ printk(KERN_DEBUG "IRQ%d ", irq);
for (;;) {
printk("-> %d:%d", entry->apic, entry->pin);
if (!entry->next)
break;
- entry = irq_2_pin + entry->next;
+ entry = entry->next;
}
printk("\n");
}
@@ -1236,7 +1566,7 @@ __apicdebuginit(void) print_APIC_bitfield(int base)
__apicdebuginit(void) print_local_APIC(void *dummy)
{
unsigned int v, ver, maxlvt;
- unsigned long icr;
+ u64 icr;
if (apic_verbosity == APIC_QUIET)
return;
@@ -1253,20 +1583,31 @@ __apicdebuginit(void) print_local_APIC(void *dummy)
v = apic_read(APIC_TASKPRI);
printk(KERN_DEBUG "... APIC TASKPRI: %08x (%02x)\n", v, v & APIC_TPRI_MASK);
- v = apic_read(APIC_ARBPRI);
- printk(KERN_DEBUG "... APIC ARBPRI: %08x (%02x)\n", v,
- v & APIC_ARBPRI_MASK);
- v = apic_read(APIC_PROCPRI);
- printk(KERN_DEBUG "... APIC PROCPRI: %08x\n", v);
+ if (APIC_INTEGRATED(ver)) { /* !82489DX */
+ if (!APIC_XAPIC(ver)) {
+ v = apic_read(APIC_ARBPRI);
+ printk(KERN_DEBUG "... APIC ARBPRI: %08x (%02x)\n", v,
+ v & APIC_ARBPRI_MASK);
+ }
+ v = apic_read(APIC_PROCPRI);
+ printk(KERN_DEBUG "... APIC PROCPRI: %08x\n", v);
+ }
+
+ /*
+ * Remote read supported only in the 82489DX and local APIC for
+ * Pentium processors.
+ */
+ if (!APIC_INTEGRATED(ver) || maxlvt == 3) {
+ v = apic_read(APIC_RRR);
+ printk(KERN_DEBUG "... APIC RRR: %08x\n", v);
+ }
- v = apic_read(APIC_EOI);
- printk(KERN_DEBUG "... APIC EOI: %08x\n", v);
- v = apic_read(APIC_RRR);
- printk(KERN_DEBUG "... APIC RRR: %08x\n", v);
v = apic_read(APIC_LDR);
printk(KERN_DEBUG "... APIC LDR: %08x\n", v);
- v = apic_read(APIC_DFR);
- printk(KERN_DEBUG "... APIC DFR: %08x\n", v);
+ if (!x2apic_enabled()) {
+ v = apic_read(APIC_DFR);
+ printk(KERN_DEBUG "... APIC DFR: %08x\n", v);
+ }
v = apic_read(APIC_SPIV);
printk(KERN_DEBUG "... APIC SPIV: %08x\n", v);
@@ -1277,8 +1618,13 @@ __apicdebuginit(void) print_local_APIC(void *dummy)
printk(KERN_DEBUG "... APIC IRR field:\n");
print_APIC_bitfield(APIC_IRR);
- v = apic_read(APIC_ESR);
- printk(KERN_DEBUG "... APIC ESR: %08x\n", v);
+ if (APIC_INTEGRATED(ver)) { /* !82489DX */
+ if (maxlvt > 3) /* Due to the Pentium erratum 3AP. */
+ apic_write(APIC_ESR, 0);
+
+ v = apic_read(APIC_ESR);
+ printk(KERN_DEBUG "... APIC ESR: %08x\n", v);
+ }
icr = apic_icr_read();
printk(KERN_DEBUG "... APIC ICR: %08x\n", (u32)icr);
@@ -1312,7 +1658,12 @@ __apicdebuginit(void) print_local_APIC(void *dummy)
__apicdebuginit(void) print_all_local_APICs(void)
{
- on_each_cpu(print_local_APIC, NULL, 1);
+ int cpu;
+
+ preempt_disable();
+ for_each_online_cpu(cpu)
+ smp_call_function_single(cpu, print_local_APIC, NULL, 1);
+ preempt_enable();
}
__apicdebuginit(void) print_PIC(void)
@@ -1359,17 +1710,22 @@ __apicdebuginit(int) print_all_ICs(void)
fs_initcall(print_all_ICs);
+/* Where if anywhere is the i8259 connect in external int mode */
+static struct { int pin, apic; } ioapic_i8259 = { -1, -1 };
+
void __init enable_IO_APIC(void)
{
union IO_APIC_reg_01 reg_01;
int i8259_apic, i8259_pin;
- int i, apic;
+ int apic;
unsigned long flags;
- for (i = 0; i < PIN_MAP_SIZE; i++) {
- irq_2_pin[i].pin = -1;
- irq_2_pin[i].next = 0;
- }
+#ifdef CONFIG_X86_32
+ int i;
+ if (!pirqs_enabled)
+ for (i = 0; i < MAX_PIRQS; i++)
+ pirq_entries[i] = -1;
+#endif
/*
* The number of IO-APIC IRQ registers (== #pins):
@@ -1399,6 +1755,10 @@ void __init enable_IO_APIC(void)
}
found_i8259:
/* Look to see what if the MP table has reported the ExtINT */
+ /* If we could not find the appropriate pin by looking at the ioapic
+ * the i8259 probably is not connected the ioapic but give the
+ * mptable a chance anyway.
+ */
i8259_pin = find_isa_irq_pin(0, mp_ExtINT);
i8259_apic = find_isa_irq_apic(0, mp_ExtINT);
/* Trust the MP table if nothing is setup in the hardware */
@@ -1458,6 +1818,133 @@ void disable_IO_APIC(void)
disconnect_bsp_APIC(ioapic_i8259.pin != -1);
}
+#ifdef CONFIG_X86_32
+/*
+ * function to set the IO-APIC physical IDs based on the
+ * values stored in the MPC table.
+ *
+ * by Matt Domsch <Matt_Domsch@dell.com> Tue Dec 21 12:25:05 CST 1999
+ */
+
+static void __init setup_ioapic_ids_from_mpc(void)
+{
+ union IO_APIC_reg_00 reg_00;
+ physid_mask_t phys_id_present_map;
+ int apic;
+ int i;
+ unsigned char old_id;
+ unsigned long flags;
+
+ if (x86_quirks->setup_ioapic_ids && x86_quirks->setup_ioapic_ids())
+ return;
+
+ /*
+ * Don't check I/O APIC IDs for xAPIC systems. They have
+ * no meaning without the serial APIC bus.
+ */
+ if (!(boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)
+ || APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
+ return;
+ /*
+ * This is broken; anything with a real cpu count has to
+ * circumvent this idiocy regardless.
+ */
+ phys_id_present_map = ioapic_phys_id_map(phys_cpu_present_map);
+
+ /*
+ * Set the IOAPIC ID to the value stored in the MPC table.
+ */
+ for (apic = 0; apic < nr_ioapics; apic++) {
+
+ /* Read the register 0 value */
+ spin_lock_irqsave(&ioapic_lock, flags);
+ reg_00.raw = io_apic_read(apic, 0);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+
+ old_id = mp_ioapics[apic].mp_apicid;
+
+ if (mp_ioapics[apic].mp_apicid >= get_physical_broadcast()) {
+ printk(KERN_ERR "BIOS bug, IO-APIC#%d ID is %d in the MPC table!...\n",
+ apic, mp_ioapics[apic].mp_apicid);
+ printk(KERN_ERR "... fixing up to %d. (tell your hw vendor)\n",
+ reg_00.bits.ID);
+ mp_ioapics[apic].mp_apicid = reg_00.bits.ID;
+ }
+
+ /*
+ * Sanity check, is the ID really free? Every APIC in a
+ * system must have a unique ID or we get lots of nice
+ * 'stuck on smp_invalidate_needed IPI wait' messages.
+ */
+ if (check_apicid_used(phys_id_present_map,
+ mp_ioapics[apic].mp_apicid)) {
+ printk(KERN_ERR "BIOS bug, IO-APIC#%d ID %d is already used!...\n",
+ apic, mp_ioapics[apic].mp_apicid);
+ for (i = 0; i < get_physical_broadcast(); i++)
+ if (!physid_isset(i, phys_id_present_map))
+ break;
+ if (i >= get_physical_broadcast())
+ panic("Max APIC ID exceeded!\n");
+ printk(KERN_ERR "... fixing up to %d. (tell your hw vendor)\n",
+ i);
+ physid_set(i, phys_id_present_map);
+ mp_ioapics[apic].mp_apicid = i;
+ } else {
+ physid_mask_t tmp;
+ tmp = apicid_to_cpu_present(mp_ioapics[apic].mp_apicid);
+ apic_printk(APIC_VERBOSE, "Setting %d in the "
+ "phys_id_present_map\n",
+ mp_ioapics[apic].mp_apicid);
+ physids_or(phys_id_present_map, phys_id_present_map, tmp);
+ }
+
+
+ /*
+ * We need to adjust the IRQ routing table
+ * if the ID changed.
+ */
+ if (old_id != mp_ioapics[apic].mp_apicid)
+ for (i = 0; i < mp_irq_entries; i++)
+ if (mp_irqs[i].mp_dstapic == old_id)
+ mp_irqs[i].mp_dstapic
+ = mp_ioapics[apic].mp_apicid;
+
+ /*
+ * Read the right value from the MPC table and
+ * write it into the ID register.
+ */
+ apic_printk(APIC_VERBOSE, KERN_INFO
+ "...changing IO-APIC physical APIC ID to %d ...",
+ mp_ioapics[apic].mp_apicid);
+
+ reg_00.bits.ID = mp_ioapics[apic].mp_apicid;
+ spin_lock_irqsave(&ioapic_lock, flags);
+ io_apic_write(apic, 0, reg_00.raw);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+
+ /*
+ * Sanity check
+ */
+ spin_lock_irqsave(&ioapic_lock, flags);
+ reg_00.raw = io_apic_read(apic, 0);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+ if (reg_00.bits.ID != mp_ioapics[apic].mp_apicid)
+ printk("could not set ID!\n");
+ else
+ apic_printk(APIC_VERBOSE, " ok.\n");
+ }
+}
+#endif
+
+int no_timer_check __initdata;
+
+static int __init notimercheck(char *s)
+{
+ no_timer_check = 1;
+ return 1;
+}
+__setup("no_timer_check", notimercheck);
+
/*
* There is a nasty bug in some older SMP boards, their mptable lies
* about the timer IRQ. We do the following to work around the situation:
@@ -1471,6 +1958,9 @@ static int __init timer_irq_works(void)
unsigned long t1 = jiffies;
unsigned long flags;
+ if (no_timer_check)
+ return 1;
+
local_save_flags(flags);
local_irq_enable();
/* Let ten ticks pass... */
@@ -1531,9 +2021,11 @@ static unsigned int startup_ioapic_irq(unsigned int irq)
return was_pending;
}
+#ifdef CONFIG_X86_64
static int ioapic_retrigger_irq(unsigned int irq)
{
- struct irq_cfg *cfg = &irq_cfg[irq];
+
+ struct irq_cfg *cfg = irq_cfg(irq);
unsigned long flags;
spin_lock_irqsave(&vector_lock, flags);
@@ -1542,6 +2034,14 @@ static int ioapic_retrigger_irq(unsigned int irq)
return 1;
}
+#else
+static int ioapic_retrigger_irq(unsigned int irq)
+{
+ send_IPI_self(irq_cfg(irq)->vector);
+
+ return 1;
+}
+#endif
/*
* Level and edge triggered IO-APIC interrupts need different handling,
@@ -1580,11 +2080,11 @@ static DECLARE_DELAYED_WORK(ir_migration_work, ir_irq_migration);
*/
static void migrate_ioapic_irq(int irq, cpumask_t mask)
{
- struct irq_cfg *cfg = irq_cfg + irq;
- struct irq_desc *desc = irq_desc + irq;
+ struct irq_cfg *cfg;
+ struct irq_desc *desc;
cpumask_t tmp, cleanup_mask;
struct irte irte;
- int modify_ioapic_rte = desc->status & IRQ_LEVEL;
+ int modify_ioapic_rte;
unsigned int dest;
unsigned long flags;
@@ -1598,9 +2098,12 @@ static void migrate_ioapic_irq(int irq, cpumask_t mask)
if (assign_irq_vector(irq, mask))
return;
+ cfg = irq_cfg(irq);
cpus_and(tmp, cfg->domain, mask);
dest = cpu_mask_to_apicid(tmp);
+ desc = irq_to_desc(irq);
+ modify_ioapic_rte = desc->status & IRQ_LEVEL;
if (modify_ioapic_rte) {
spin_lock_irqsave(&ioapic_lock, flags);
__target_IO_APIC_irq(irq, dest, cfg->vector);
@@ -1622,18 +2125,19 @@ static void migrate_ioapic_irq(int irq, cpumask_t mask)
cfg->move_in_progress = 0;
}
- irq_desc[irq].affinity = mask;
+ desc->affinity = mask;
}
static int migrate_irq_remapped_level(int irq)
{
int ret = -1;
+ struct irq_desc *desc = irq_to_desc(irq);
mask_IO_APIC_irq(irq);
if (io_apic_level_ack_pending(irq)) {
/*
- * Interrupt in progress. Migrating irq now will change the
+ * Interrupt in progress. Migrating irq now will change the
* vector information in the IO-APIC RTE and that will confuse
* the EOI broadcast performed by cpu.
* So, delay the irq migration to the next instance.
@@ -1643,11 +2147,11 @@ static int migrate_irq_remapped_level(int irq)
}
/* everthing is clear. we have right of way */
- migrate_ioapic_irq(irq, irq_desc[irq].pending_mask);
+ migrate_ioapic_irq(irq, desc->pending_mask);
ret = 0;
- irq_desc[irq].status &= ~IRQ_MOVE_PENDING;
- cpus_clear(irq_desc[irq].pending_mask);
+ desc->status &= ~IRQ_MOVE_PENDING;
+ cpus_clear(desc->pending_mask);
unmask:
unmask_IO_APIC_irq(irq);
@@ -1656,10 +2160,10 @@ unmask:
static void ir_irq_migration(struct work_struct *work)
{
- int irq;
+ unsigned int irq;
+ struct irq_desc *desc;
- for (irq = 0; irq < NR_IRQS; irq++) {
- struct irq_desc *desc = irq_desc + irq;
+ for_each_irq_desc(irq, desc) {
if (desc->status & IRQ_MOVE_PENDING) {
unsigned long flags;
@@ -1671,8 +2175,7 @@ static void ir_irq_migration(struct work_struct *work)
continue;
}
- desc->chip->set_affinity(irq,
- irq_desc[irq].pending_mask);
+ desc->chip->set_affinity(irq, desc->pending_mask);
spin_unlock_irqrestore(&desc->lock, flags);
}
}
@@ -1683,9 +2186,11 @@ static void ir_irq_migration(struct work_struct *work)
*/
static void set_ir_ioapic_affinity_irq(unsigned int irq, cpumask_t mask)
{
- if (irq_desc[irq].status & IRQ_LEVEL) {
- irq_desc[irq].status |= IRQ_MOVE_PENDING;
- irq_desc[irq].pending_mask = mask;
+ struct irq_desc *desc = irq_to_desc(irq);
+
+ if (desc->status & IRQ_LEVEL) {
+ desc->status |= IRQ_MOVE_PENDING;
+ desc->pending_mask = mask;
migrate_irq_remapped_level(irq);
return;
}
@@ -1698,7 +2203,9 @@ asmlinkage void smp_irq_move_cleanup_interrupt(void)
{
unsigned vector, me;
ack_APIC_irq();
+#ifdef CONFIG_X86_64
exit_idle();
+#endif
irq_enter();
me = smp_processor_id();
@@ -1707,11 +2214,12 @@ asmlinkage void smp_irq_move_cleanup_interrupt(void)
struct irq_desc *desc;
struct irq_cfg *cfg;
irq = __get_cpu_var(vector_irq)[vector];
- if (irq >= NR_IRQS)
+
+ desc = irq_to_desc(irq);
+ if (!desc)
continue;
- desc = irq_desc + irq;
- cfg = irq_cfg + irq;
+ cfg = irq_cfg(irq);
spin_lock(&desc->lock);
if (!cfg->move_cleanup_count)
goto unlock;
@@ -1730,7 +2238,7 @@ unlock:
static void irq_complete_move(unsigned int irq)
{
- struct irq_cfg *cfg = irq_cfg + irq;
+ struct irq_cfg *cfg = irq_cfg(irq);
unsigned vector, me;
if (likely(!cfg->move_in_progress))
@@ -1769,19 +2277,50 @@ static void ack_apic_edge(unsigned int irq)
ack_APIC_irq();
}
+atomic_t irq_mis_count;
+
static void ack_apic_level(unsigned int irq)
{
+#ifdef CONFIG_X86_32
+ unsigned long v;
+ int i;
+#endif
int do_unmask_irq = 0;
irq_complete_move(irq);
#ifdef CONFIG_GENERIC_PENDING_IRQ
/* If we are moving the irq we need to mask it */
- if (unlikely(irq_desc[irq].status & IRQ_MOVE_PENDING)) {
+ if (unlikely(irq_to_desc(irq)->status & IRQ_MOVE_PENDING)) {
do_unmask_irq = 1;
mask_IO_APIC_irq(irq);
}
#endif
+#ifdef CONFIG_X86_32
+ /*
+ * It appears there is an erratum which affects at least version 0x11
+ * of I/O APIC (that's the 82093AA and cores integrated into various
+ * chipsets). Under certain conditions a level-triggered interrupt is
+ * erroneously delivered as edge-triggered one but the respective IRR
+ * bit gets set nevertheless. As a result the I/O unit expects an EOI
+ * message but it will never arrive and further interrupts are blocked
+ * from the source. The exact reason is so far unknown, but the
+ * phenomenon was observed when two consecutive interrupt requests
+ * from a given source get delivered to the same CPU and the source is
+ * temporarily disabled in between.
+ *
+ * A workaround is to simulate an EOI message manually. We achieve it
+ * by setting the trigger mode to edge and then to level when the edge
+ * trigger mode gets detected in the TMR of a local APIC for a
+ * level-triggered interrupt. We mask the source for the time of the
+ * operation to prevent an edge-triggered interrupt escaping meanwhile.
+ * The idea is from Manfred Spraul. --macro
+ */
+ i = irq_cfg(irq)->vector;
+
+ v = apic_read(APIC_TMR + ((i & ~0x1f) >> 1));
+#endif
+
/*
* We must acknowledge the irq before we move it or the acknowledge will
* not propagate properly.
@@ -1820,31 +2359,41 @@ static void ack_apic_level(unsigned int irq)
move_masked_irq(irq);
unmask_IO_APIC_irq(irq);
}
+
+#ifdef CONFIG_X86_32
+ if (!(v & (1 << (i & 0x1f)))) {
+ atomic_inc(&irq_mis_count);
+ spin_lock(&ioapic_lock);
+ __mask_and_edge_IO_APIC_irq(irq);
+ __unmask_and_level_IO_APIC_irq(irq);
+ spin_unlock(&ioapic_lock);
+ }
+#endif
}
static struct irq_chip ioapic_chip __read_mostly = {
- .name = "IO-APIC",
- .startup = startup_ioapic_irq,
- .mask = mask_IO_APIC_irq,
- .unmask = unmask_IO_APIC_irq,
- .ack = ack_apic_edge,
- .eoi = ack_apic_level,
+ .name = "IO-APIC",
+ .startup = startup_ioapic_irq,
+ .mask = mask_IO_APIC_irq,
+ .unmask = unmask_IO_APIC_irq,
+ .ack = ack_apic_edge,
+ .eoi = ack_apic_level,
#ifdef CONFIG_SMP
- .set_affinity = set_ioapic_affinity_irq,
+ .set_affinity = set_ioapic_affinity_irq,
#endif
.retrigger = ioapic_retrigger_irq,
};
#ifdef CONFIG_INTR_REMAP
static struct irq_chip ir_ioapic_chip __read_mostly = {
- .name = "IR-IO-APIC",
- .startup = startup_ioapic_irq,
- .mask = mask_IO_APIC_irq,
- .unmask = unmask_IO_APIC_irq,
- .ack = ack_x2apic_edge,
- .eoi = ack_x2apic_level,
+ .name = "IR-IO-APIC",
+ .startup = startup_ioapic_irq,
+ .mask = mask_IO_APIC_irq,
+ .unmask = unmask_IO_APIC_irq,
+ .ack = ack_x2apic_edge,
+ .eoi = ack_x2apic_level,
#ifdef CONFIG_SMP
- .set_affinity = set_ir_ioapic_affinity_irq,
+ .set_affinity = set_ir_ioapic_affinity_irq,
#endif
.retrigger = ioapic_retrigger_irq,
};
@@ -1853,6 +2402,8 @@ static struct irq_chip ir_ioapic_chip __read_mostly = {
static inline void init_IO_APIC_traps(void)
{
int irq;
+ struct irq_desc *desc;
+ struct irq_cfg *cfg;
/*
* NOTE! The local APIC isn't very good at handling
@@ -1865,8 +2416,8 @@ static inline void init_IO_APIC_traps(void)
* Also, we've got to be careful not to trash gate
* 0x80, because int 0x80 is hm, kind of importantish. ;)
*/
- for (irq = 0; irq < NR_IRQS ; irq++) {
- if (IO_APIC_IRQ(irq) && !irq_cfg[irq].vector) {
+ for_each_irq_cfg(irq, cfg) {
+ if (IO_APIC_IRQ(irq) && !cfg->vector) {
/*
* Hmm.. We don't have an entry for this,
* so default to an old-fashioned 8259
@@ -1874,27 +2425,33 @@ static inline void init_IO_APIC_traps(void)
*/
if (irq < 16)
make_8259A_irq(irq);
- else
+ else {
+ desc = irq_to_desc(irq);
/* Strange. Oh, well.. */
- irq_desc[irq].chip = &no_irq_chip;
+ desc->chip = &no_irq_chip;
+ }
}
}
}
-static void unmask_lapic_irq(unsigned int irq)
+/*
+ * The local APIC irq-chip implementation:
+ */
+
+static void mask_lapic_irq(unsigned int irq)
{
unsigned long v;
v = apic_read(APIC_LVT0);
- apic_write(APIC_LVT0, v & ~APIC_LVT_MASKED);
+ apic_write(APIC_LVT0, v | APIC_LVT_MASKED);
}
-static void mask_lapic_irq(unsigned int irq)
+static void unmask_lapic_irq(unsigned int irq)
{
unsigned long v;
v = apic_read(APIC_LVT0);
- apic_write(APIC_LVT0, v | APIC_LVT_MASKED);
+ apic_write(APIC_LVT0, v & ~APIC_LVT_MASKED);
}
static void ack_lapic_irq (unsigned int irq)
@@ -1911,7 +2468,10 @@ static struct irq_chip lapic_chip __read_mostly = {
static void lapic_register_intr(int irq)
{
- irq_desc[irq].status &= ~IRQ_LEVEL;
+ struct irq_desc *desc;
+
+ desc = irq_to_desc(irq);
+ desc->status &= ~IRQ_LEVEL;
set_irq_chip_and_handler_name(irq, &lapic_chip, handle_edge_irq,
"edge");
}
@@ -1919,19 +2479,19 @@ static void lapic_register_intr(int irq)
static void __init setup_nmi(void)
{
/*
- * Dirty trick to enable the NMI watchdog ...
+ * Dirty trick to enable the NMI watchdog ...
* We put the 8259A master into AEOI mode and
* unmask on all local APICs LVT0 as NMI.
*
* The idea to use the 8259A in AEOI mode ('8259A Virtual Wire')
* is from Maciej W. Rozycki - so we do not have to EOI from
* the NMI handler or the timer interrupt.
- */
- printk(KERN_INFO "activating NMI Watchdog ...");
+ */
+ apic_printk(APIC_VERBOSE, KERN_INFO "activating NMI Watchdog ...");
enable_NMI_through_LVT0();
- printk(" done.\n");
+ apic_printk(APIC_VERBOSE, " done.\n");
}
/*
@@ -1948,12 +2508,17 @@ static inline void __init unlock_ExtINT_logic(void)
unsigned char save_control, save_freq_select;
pin = find_isa_irq_pin(8, mp_INT);
+ if (pin == -1) {
+ WARN_ON_ONCE(1);
+ return;
+ }
apic = find_isa_irq_apic(8, mp_INT);
- if (pin == -1)
+ if (apic == -1) {
+ WARN_ON_ONCE(1);
return;
+ }
entry0 = ioapic_read_entry(apic, pin);
-
clear_IO_APIC_pin(apic, pin);
memset(&entry1, 0, sizeof(entry1));
@@ -1988,23 +2553,38 @@ static inline void __init unlock_ExtINT_logic(void)
ioapic_write_entry(apic, pin, entry0);
}
+static int disable_timer_pin_1 __initdata;
+/* Actually the next is obsolete, but keep it for paranoid reasons -AK */
+static int __init disable_timer_pin_setup(char *arg)
+{
+ disable_timer_pin_1 = 1;
+ return 0;
+}
+early_param("disable_timer_pin_1", disable_timer_pin_setup);
+
+int timer_through_8259 __initdata;
+
/*
* This code may look a bit paranoid, but it's supposed to cooperate with
* a wide range of boards and BIOS bugs. Fortunately only the timer IRQ
* is so screwy. Thanks to Brian Perkins for testing/hacking this beast
* fanatically on his truly buggy board.
*
- * FIXME: really need to revamp this for modern platforms only.
+ * FIXME: really need to revamp this for all platforms.
*/
static inline void __init check_timer(void)
{
- struct irq_cfg *cfg = irq_cfg + 0;
+ struct irq_cfg *cfg = irq_cfg(0);
int apic1, pin1, apic2, pin2;
unsigned long flags;
+ unsigned int ver;
int no_pin1 = 0;
local_irq_save(flags);
+ ver = apic_read(APIC_LVR);
+ ver = GET_APIC_VERSION(ver);
+
/*
* get/set the timer IRQ vector:
*/
@@ -2013,10 +2593,18 @@ static inline void __init check_timer(void)
/*
* As IRQ0 is to be enabled in the 8259A, the virtual
- * wire has to be disabled in the local APIC.
+ * wire has to be disabled in the local APIC. Also
+ * timer interrupts need to be acknowledged manually in
+ * the 8259A for the i82489DX when using the NMI
+ * watchdog as that APIC treats NMIs as level-triggered.
+ * The AEOI mode will finish them in the 8259A
+ * automatically.
*/
apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_EXTINT);
init_8259A(1);
+#ifdef CONFIG_X86_32
+ timer_ack = (nmi_watchdog == NMI_IO_APIC && !APIC_INTEGRATED(ver));
+#endif
pin1 = find_isa_irq_pin(0, mp_INT);
apic1 = find_isa_irq_apic(0, mp_INT);
@@ -2035,8 +2623,10 @@ static inline void __init check_timer(void)
* 8259A.
*/
if (pin1 == -1) {
+#ifdef CONFIG_INTR_REMAP
if (intr_remapping_enabled)
panic("BIOS bug: timer not connected to IO-APIC");
+#endif
pin1 = pin2;
apic1 = apic2;
no_pin1 = 1;
@@ -2054,7 +2644,7 @@ static inline void __init check_timer(void)
setup_timer_IRQ0_pin(apic1, pin1, cfg->vector);
}
unmask_IO_APIC_irq(0);
- if (!no_timer_check && timer_irq_works()) {
+ if (timer_irq_works()) {
if (nmi_watchdog == NMI_IO_APIC) {
setup_nmi();
enable_8259A_irq(0);
@@ -2063,8 +2653,10 @@ static inline void __init check_timer(void)
clear_IO_APIC_pin(0, pin1);
goto out;
}
+#ifdef CONFIG_INTR_REMAP
if (intr_remapping_enabled)
panic("timer doesn't work through Interrupt-remapped IO-APIC");
+#endif
clear_IO_APIC_pin(apic1, pin1);
if (!no_pin1)
apic_printk(APIC_QUIET, KERN_ERR "..MP-BIOS bug: "
@@ -2104,6 +2696,9 @@ static inline void __init check_timer(void)
"through the IO-APIC - disabling NMI Watchdog!\n");
nmi_watchdog = NMI_NONE;
}
+#ifdef CONFIG_X86_32
+ timer_ack = 0;
+#endif
apic_printk(APIC_QUIET, KERN_INFO
"...trying to set up timer as Virtual Wire IRQ...\n");
@@ -2140,13 +2735,6 @@ out:
local_irq_restore(flags);
}
-static int __init notimercheck(char *s)
-{
- no_timer_check = 1;
- return 1;
-}
-__setup("no_timer_check", notimercheck);
-
/*
* Traditionally ISA IRQ2 is the cascade IRQ, and is not available
* to devices. However there may be an I/O APIC pin available for
@@ -2164,25 +2752,49 @@ __setup("no_timer_check", notimercheck);
* the I/O APIC in all cases now. No actual device should request
* it anyway. --macro
*/
-#define PIC_IRQS (1<<2)
+#define PIC_IRQS (1 << PIC_CASCADE_IR)
void __init setup_IO_APIC(void)
{
+#ifdef CONFIG_X86_32
+ enable_IO_APIC();
+#else
/*
* calling enable_IO_APIC() is moved to setup_local_APIC for BP
*/
+#endif
io_apic_irqs = ~PIC_IRQS;
apic_printk(APIC_VERBOSE, "ENABLING IO-APIC IRQs\n");
-
+ /*
+ * Set up IO-APIC IRQ routing.
+ */
+#ifdef CONFIG_X86_32
+ if (!acpi_ioapic)
+ setup_ioapic_ids_from_mpc();
+#endif
sync_Arb_IDs();
setup_IO_APIC_irqs();
init_IO_APIC_traps();
check_timer();
}
+/*
+ * Called after all the initialization is done. If we didnt find any
+ * APIC bugs then we can allow the modify fast path
+ */
+
+static int __init io_apic_bug_finalize(void)
+{
+ if (sis_apic_bug == -1)
+ sis_apic_bug = 0;
+ return 0;
+}
+
+late_initcall(io_apic_bug_finalize);
+
struct sysfs_ioapic_data {
struct sys_device dev;
struct IO_APIC_route_entry entry[0];
@@ -2270,32 +2882,51 @@ device_initcall(ioapic_init_sysfs);
/*
* Dynamic irq allocate and deallocation
*/
-int create_irq(void)
+unsigned int create_irq_nr(unsigned int irq_want)
{
/* Allocate an unused irq */
- int irq;
- int new;
+ unsigned int irq;
+ unsigned int new;
unsigned long flags;
+ struct irq_cfg *cfg_new;
+
+ irq_want = nr_irqs - 1;
- irq = -ENOSPC;
+ irq = 0;
spin_lock_irqsave(&vector_lock, flags);
- for (new = (NR_IRQS - 1); new >= 0; new--) {
+ for (new = irq_want; new > 0; new--) {
if (platform_legacy_irq(new))
continue;
- if (irq_cfg[new].vector != 0)
+ cfg_new = irq_cfg(new);
+ if (cfg_new && cfg_new->vector != 0)
continue;
+ /* check if need to create one */
+ if (!cfg_new)
+ cfg_new = irq_cfg_alloc(new);
if (__assign_irq_vector(new, TARGET_CPUS) == 0)
irq = new;
break;
}
spin_unlock_irqrestore(&vector_lock, flags);
- if (irq >= 0) {
+ if (irq > 0) {
dynamic_irq_init(irq);
}
return irq;
}
+int create_irq(void)
+{
+ int irq;
+
+ irq = create_irq_nr(nr_irqs - 1);
+
+ if (irq == 0)
+ irq = -1;
+
+ return irq;
+}
+
void destroy_irq(unsigned int irq)
{
unsigned long flags;
@@ -2316,7 +2947,7 @@ void destroy_irq(unsigned int irq)
#ifdef CONFIG_PCI_MSI
static int msi_compose_msg(struct pci_dev *pdev, unsigned int irq, struct msi_msg *msg)
{
- struct irq_cfg *cfg = irq_cfg + irq;
+ struct irq_cfg *cfg;
int err;
unsigned dest;
cpumask_t tmp;
@@ -2326,6 +2957,7 @@ static int msi_compose_msg(struct pci_dev *pdev, unsigned int irq, struct msi_ms
if (err)
return err;
+ cfg = irq_cfg(irq);
cpus_and(tmp, cfg->domain, tmp);
dest = cpu_mask_to_apicid(tmp);
@@ -2383,10 +3015,11 @@ static int msi_compose_msg(struct pci_dev *pdev, unsigned int irq, struct msi_ms
#ifdef CONFIG_SMP
static void set_msi_irq_affinity(unsigned int irq, cpumask_t mask)
{
- struct irq_cfg *cfg = irq_cfg + irq;
+ struct irq_cfg *cfg;
struct msi_msg msg;
unsigned int dest;
cpumask_t tmp;
+ struct irq_desc *desc;
cpus_and(tmp, mask, cpu_online_map);
if (cpus_empty(tmp))
@@ -2395,6 +3028,7 @@ static void set_msi_irq_affinity(unsigned int irq, cpumask_t mask)
if (assign_irq_vector(irq, mask))
return;
+ cfg = irq_cfg(irq);
cpus_and(tmp, cfg->domain, mask);
dest = cpu_mask_to_apicid(tmp);
@@ -2406,7 +3040,8 @@ static void set_msi_irq_affinity(unsigned int irq, cpumask_t mask)
msg.address_lo |= MSI_ADDR_DEST_ID(dest);
write_msi_msg(irq, &msg);
- irq_desc[irq].affinity = mask;
+ desc = irq_to_desc(irq);
+ desc->affinity = mask;
}
#ifdef CONFIG_INTR_REMAP
@@ -2416,10 +3051,11 @@ static void set_msi_irq_affinity(unsigned int irq, cpumask_t mask)
*/
static void ir_set_msi_irq_affinity(unsigned int irq, cpumask_t mask)
{
- struct irq_cfg *cfg = irq_cfg + irq;
+ struct irq_cfg *cfg;
unsigned int dest;
cpumask_t tmp, cleanup_mask;
struct irte irte;
+ struct irq_desc *desc;
cpus_and(tmp, mask, cpu_online_map);
if (cpus_empty(tmp))
@@ -2431,6 +3067,7 @@ static void ir_set_msi_irq_affinity(unsigned int irq, cpumask_t mask)
if (assign_irq_vector(irq, mask))
return;
+ cfg = irq_cfg(irq);
cpus_and(tmp, cfg->domain, mask);
dest = cpu_mask_to_apicid(tmp);
@@ -2454,7 +3091,8 @@ static void ir_set_msi_irq_affinity(unsigned int irq, cpumask_t mask)
cfg->move_in_progress = 0;
}
- irq_desc[irq].affinity = mask;
+ desc = irq_to_desc(irq);
+ desc->affinity = mask;
}
#endif
#endif /* CONFIG_SMP */
@@ -2507,7 +3145,7 @@ static int msi_alloc_irte(struct pci_dev *dev, int irq, int nvec)
if (index < 0) {
printk(KERN_ERR
"Unable to allocate %d IRTE for PCI %s\n", nvec,
- pci_name(dev));
+ pci_name(dev));
return -ENOSPC;
}
return index;
@@ -2528,7 +3166,7 @@ static int setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc, int irq)
#ifdef CONFIG_INTR_REMAP
if (irq_remapped(irq)) {
- struct irq_desc *desc = irq_desc + irq;
+ struct irq_desc *desc = irq_to_desc(irq);
/*
* irq migration in process context
*/
@@ -2538,16 +3176,34 @@ static int setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc, int irq)
#endif
set_irq_chip_and_handler_name(irq, &msi_chip, handle_edge_irq, "edge");
+ dev_printk(KERN_DEBUG, &dev->dev, "irq %d for MSI/MSI-X\n", irq);
+
return 0;
}
+static unsigned int build_irq_for_pci_dev(struct pci_dev *dev)
+{
+ unsigned int irq;
+
+ irq = dev->bus->number;
+ irq <<= 8;
+ irq |= dev->devfn;
+ irq <<= 12;
+
+ return irq;
+}
+
int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
{
- int irq, ret;
+ unsigned int irq;
+ int ret;
+ unsigned int irq_want;
- irq = create_irq();
- if (irq < 0)
- return irq;
+ irq_want = build_irq_for_pci_dev(dev) + 0x100;
+
+ irq = create_irq_nr(irq_want);
+ if (irq == 0)
+ return -1;
#ifdef CONFIG_INTR_REMAP
if (!intr_remapping_enabled)
@@ -2574,18 +3230,22 @@ error:
int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
{
- int irq, ret, sub_handle;
+ unsigned int irq;
+ int ret, sub_handle;
struct msi_desc *desc;
+ unsigned int irq_want;
+
#ifdef CONFIG_INTR_REMAP
struct intel_iommu *iommu = 0;
int index = 0;
#endif
+ irq_want = build_irq_for_pci_dev(dev) + 0x100;
sub_handle = 0;
list_for_each_entry(desc, &dev->msi_list, list) {
- irq = create_irq();
- if (irq < 0)
- return irq;
+ irq = create_irq_nr(irq_want--);
+ if (irq == 0)
+ return -1;
#ifdef CONFIG_INTR_REMAP
if (!intr_remapping_enabled)
goto no_ir;
@@ -2636,10 +3296,11 @@ void arch_teardown_msi_irq(unsigned int irq)
#ifdef CONFIG_SMP
static void dmar_msi_set_affinity(unsigned int irq, cpumask_t mask)
{
- struct irq_cfg *cfg = irq_cfg + irq;
+ struct irq_cfg *cfg;
struct msi_msg msg;
unsigned int dest;
cpumask_t tmp;
+ struct irq_desc *desc;
cpus_and(tmp, mask, cpu_online_map);
if (cpus_empty(tmp))
@@ -2648,6 +3309,7 @@ static void dmar_msi_set_affinity(unsigned int irq, cpumask_t mask)
if (assign_irq_vector(irq, mask))
return;
+ cfg = irq_cfg(irq);
cpus_and(tmp, cfg->domain, mask);
dest = cpu_mask_to_apicid(tmp);
@@ -2659,7 +3321,8 @@ static void dmar_msi_set_affinity(unsigned int irq, cpumask_t mask)
msg.address_lo |= MSI_ADDR_DEST_ID(dest);
dmar_msi_write(irq, &msg);
- irq_desc[irq].affinity = mask;
+ desc = irq_to_desc(irq);
+ desc->affinity = mask;
}
#endif /* CONFIG_SMP */
@@ -2689,6 +3352,69 @@ int arch_setup_dmar_msi(unsigned int irq)
}
#endif
+#ifdef CONFIG_HPET_TIMER
+
+#ifdef CONFIG_SMP
+static void hpet_msi_set_affinity(unsigned int irq, cpumask_t mask)
+{
+ struct irq_cfg *cfg;
+ struct irq_desc *desc;
+ struct msi_msg msg;
+ unsigned int dest;
+ cpumask_t tmp;
+
+ cpus_and(tmp, mask, cpu_online_map);
+ if (cpus_empty(tmp))
+ return;
+
+ if (assign_irq_vector(irq, mask))
+ return;
+
+ cfg = irq_cfg(irq);
+ cpus_and(tmp, cfg->domain, mask);
+ dest = cpu_mask_to_apicid(tmp);
+
+ hpet_msi_read(irq, &msg);
+
+ msg.data &= ~MSI_DATA_VECTOR_MASK;
+ msg.data |= MSI_DATA_VECTOR(cfg->vector);
+ msg.address_lo &= ~MSI_ADDR_DEST_ID_MASK;
+ msg.address_lo |= MSI_ADDR_DEST_ID(dest);
+
+ hpet_msi_write(irq, &msg);
+ desc = irq_to_desc(irq);
+ desc->affinity = mask;
+}
+#endif /* CONFIG_SMP */
+
+struct irq_chip hpet_msi_type = {
+ .name = "HPET_MSI",
+ .unmask = hpet_msi_unmask,
+ .mask = hpet_msi_mask,
+ .ack = ack_apic_edge,
+#ifdef CONFIG_SMP
+ .set_affinity = hpet_msi_set_affinity,
+#endif
+ .retrigger = ioapic_retrigger_irq,
+};
+
+int arch_setup_hpet_msi(unsigned int irq)
+{
+ int ret;
+ struct msi_msg msg;
+
+ ret = msi_compose_msg(NULL, irq, &msg);
+ if (ret < 0)
+ return ret;
+
+ hpet_msi_write(irq, &msg);
+ set_irq_chip_and_handler_name(irq, &hpet_msi_type, handle_edge_irq,
+ "edge");
+
+ return 0;
+}
+#endif
+
#endif /* CONFIG_PCI_MSI */
/*
* Hypertransport interrupt support
@@ -2713,9 +3439,10 @@ static void target_ht_irq(unsigned int irq, unsigned int dest, u8 vector)
static void set_ht_irq_affinity(unsigned int irq, cpumask_t mask)
{
- struct irq_cfg *cfg = irq_cfg + irq;
+ struct irq_cfg *cfg;
unsigned int dest;
cpumask_t tmp;
+ struct irq_desc *desc;
cpus_and(tmp, mask, cpu_online_map);
if (cpus_empty(tmp))
@@ -2724,11 +3451,13 @@ static void set_ht_irq_affinity(unsigned int irq, cpumask_t mask)
if (assign_irq_vector(irq, mask))
return;
+ cfg = irq_cfg(irq);
cpus_and(tmp, cfg->domain, mask);
dest = cpu_mask_to_apicid(tmp);
target_ht_irq(irq, dest, cfg->vector);
- irq_desc[irq].affinity = mask;
+ desc = irq_to_desc(irq);
+ desc->affinity = mask;
}
#endif
@@ -2745,7 +3474,7 @@ static struct irq_chip ht_irq_chip = {
int arch_setup_ht_irq(unsigned int irq, struct pci_dev *dev)
{
- struct irq_cfg *cfg = irq_cfg + irq;
+ struct irq_cfg *cfg;
int err;
cpumask_t tmp;
@@ -2755,6 +3484,7 @@ int arch_setup_ht_irq(unsigned int irq, struct pci_dev *dev)
struct ht_irq_msg msg;
unsigned dest;
+ cfg = irq_cfg(irq);
cpus_and(tmp, cfg->domain, tmp);
dest = cpu_mask_to_apicid(tmp);
@@ -2777,20 +3507,196 @@ int arch_setup_ht_irq(unsigned int irq, struct pci_dev *dev)
set_irq_chip_and_handler_name(irq, &ht_irq_chip,
handle_edge_irq, "edge");
+
+ dev_printk(KERN_DEBUG, &dev->dev, "irq %d for HT\n", irq);
}
return err;
}
#endif /* CONFIG_HT_IRQ */
+#ifdef CONFIG_X86_64
+/*
+ * Re-target the irq to the specified CPU and enable the specified MMR located
+ * on the specified blade to allow the sending of MSIs to the specified CPU.
+ */
+int arch_enable_uv_irq(char *irq_name, unsigned int irq, int cpu, int mmr_blade,
+ unsigned long mmr_offset)
+{
+ const cpumask_t *eligible_cpu = get_cpu_mask(cpu);
+ struct irq_cfg *cfg;
+ int mmr_pnode;
+ unsigned long mmr_value;
+ struct uv_IO_APIC_route_entry *entry;
+ unsigned long flags;
+ int err;
+
+ err = assign_irq_vector(irq, *eligible_cpu);
+ if (err != 0)
+ return err;
+
+ spin_lock_irqsave(&vector_lock, flags);
+ set_irq_chip_and_handler_name(irq, &uv_irq_chip, handle_percpu_irq,
+ irq_name);
+ spin_unlock_irqrestore(&vector_lock, flags);
+
+ cfg = irq_cfg(irq);
+
+ mmr_value = 0;
+ entry = (struct uv_IO_APIC_route_entry *)&mmr_value;
+ BUG_ON(sizeof(struct uv_IO_APIC_route_entry) != sizeof(unsigned long));
+
+ entry->vector = cfg->vector;
+ entry->delivery_mode = INT_DELIVERY_MODE;
+ entry->dest_mode = INT_DEST_MODE;
+ entry->polarity = 0;
+ entry->trigger = 0;
+ entry->mask = 0;
+ entry->dest = cpu_mask_to_apicid(*eligible_cpu);
+
+ mmr_pnode = uv_blade_to_pnode(mmr_blade);
+ uv_write_global_mmr64(mmr_pnode, mmr_offset, mmr_value);
+
+ return irq;
+}
+
+/*
+ * Disable the specified MMR located on the specified blade so that MSIs are
+ * longer allowed to be sent.
+ */
+void arch_disable_uv_irq(int mmr_blade, unsigned long mmr_offset)
+{
+ unsigned long mmr_value;
+ struct uv_IO_APIC_route_entry *entry;
+ int mmr_pnode;
+
+ mmr_value = 0;
+ entry = (struct uv_IO_APIC_route_entry *)&mmr_value;
+ BUG_ON(sizeof(struct uv_IO_APIC_route_entry) != sizeof(unsigned long));
+
+ entry->mask = 1;
+
+ mmr_pnode = uv_blade_to_pnode(mmr_blade);
+ uv_write_global_mmr64(mmr_pnode, mmr_offset, mmr_value);
+}
+#endif /* CONFIG_X86_64 */
+
+int __init io_apic_get_redir_entries (int ioapic)
+{
+ union IO_APIC_reg_01 reg_01;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ioapic_lock, flags);
+ reg_01.raw = io_apic_read(ioapic, 1);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+
+ return reg_01.bits.entries;
+}
+
+int __init probe_nr_irqs(void)
+{
+ int idx;
+ int nr = 0;
+#ifndef CONFIG_XEN
+ int nr_min = 32;
+#else
+ int nr_min = NR_IRQS;
+#endif
+
+ for (idx = 0; idx < nr_ioapics; idx++)
+ nr += io_apic_get_redir_entries(idx) + 1;
+
+ /* double it for hotplug and msi and nmi */
+ nr <<= 1;
+
+ /* something wrong ? */
+ if (nr < nr_min)
+ nr = nr_min;
+
+ return nr;
+}
+
/* --------------------------------------------------------------------------
ACPI-based IOAPIC Configuration
-------------------------------------------------------------------------- */
#ifdef CONFIG_ACPI
-#define IO_APIC_MAX_ID 0xFE
+#ifdef CONFIG_X86_32
+int __init io_apic_get_unique_id(int ioapic, int apic_id)
+{
+ union IO_APIC_reg_00 reg_00;
+ static physid_mask_t apic_id_map = PHYSID_MASK_NONE;
+ physid_mask_t tmp;
+ unsigned long flags;
+ int i = 0;
-int __init io_apic_get_redir_entries (int ioapic)
+ /*
+ * The P4 platform supports up to 256 APIC IDs on two separate APIC
+ * buses (one for LAPICs, one for IOAPICs), where predecessors only
+ * supports up to 16 on one shared APIC bus.
+ *
+ * TBD: Expand LAPIC/IOAPIC support on P4-class systems to take full
+ * advantage of new APIC bus architecture.
+ */
+
+ if (physids_empty(apic_id_map))
+ apic_id_map = ioapic_phys_id_map(phys_cpu_present_map);
+
+ spin_lock_irqsave(&ioapic_lock, flags);
+ reg_00.raw = io_apic_read(ioapic, 0);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+
+ if (apic_id >= get_physical_broadcast()) {
+ printk(KERN_WARNING "IOAPIC[%d]: Invalid apic_id %d, trying "
+ "%d\n", ioapic, apic_id, reg_00.bits.ID);
+ apic_id = reg_00.bits.ID;
+ }
+
+ /*
+ * Every APIC in a system must have a unique ID or we get lots of nice
+ * 'stuck on smp_invalidate_needed IPI wait' messages.
+ */
+ if (check_apicid_used(apic_id_map, apic_id)) {
+
+ for (i = 0; i < get_physical_broadcast(); i++) {
+ if (!check_apicid_used(apic_id_map, i))
+ break;
+ }
+
+ if (i == get_physical_broadcast())
+ panic("Max apic_id exceeded!\n");
+
+ printk(KERN_WARNING "IOAPIC[%d]: apic_id %d already used, "
+ "trying %d\n", ioapic, apic_id, i);
+
+ apic_id = i;
+ }
+
+ tmp = apicid_to_cpu_present(apic_id);
+ physids_or(apic_id_map, apic_id_map, tmp);
+
+ if (reg_00.bits.ID != apic_id) {
+ reg_00.bits.ID = apic_id;
+
+ spin_lock_irqsave(&ioapic_lock, flags);
+ io_apic_write(ioapic, 0, reg_00.raw);
+ reg_00.raw = io_apic_read(ioapic, 0);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+
+ /* Sanity check */
+ if (reg_00.bits.ID != apic_id) {
+ printk("IOAPIC[%d]: Unable to change apic_id!\n", ioapic);
+ return -1;
+ }
+ }
+
+ apic_printk(APIC_VERBOSE, KERN_INFO
+ "IOAPIC[%d]: Assigned apic_id %d\n", ioapic, apic_id);
+
+ return apic_id;
+}
+
+int __init io_apic_get_version(int ioapic)
{
union IO_APIC_reg_01 reg_01;
unsigned long flags;
@@ -2799,9 +3705,9 @@ int __init io_apic_get_redir_entries (int ioapic)
reg_01.raw = io_apic_read(ioapic, 1);
spin_unlock_irqrestore(&ioapic_lock, flags);
- return reg_01.bits.entries;
+ return reg_01.bits.version;
}
-
+#endif
int io_apic_set_pci_routing (int ioapic, int pin, int irq, int triggering, int polarity)
{
@@ -2853,6 +3759,7 @@ int acpi_get_override_irq(int bus_irq, int *trigger, int *polarity)
void __init setup_ioapic_dest(void)
{
int pin, ioapic, irq, irq_entry;
+ struct irq_cfg *cfg;
if (skip_ioapic_setup == 1)
return;
@@ -2868,7 +3775,8 @@ void __init setup_ioapic_dest(void)
* when you have too many devices, because at that time only boot
* cpu is online.
*/
- if (!irq_cfg[irq].vector)
+ cfg = irq_cfg(irq);
+ if (!cfg->vector)
setup_IO_APIC_irq(ioapic, pin, irq,
irq_trigger(irq_entry),
irq_polarity(irq_entry));
@@ -2926,18 +3834,33 @@ void __init ioapic_init_mappings(void)
struct resource *ioapic_res;
int i;
+ irq_2_pin_init();
ioapic_res = ioapic_setup_resources();
for (i = 0; i < nr_ioapics; i++) {
if (smp_found_config) {
ioapic_phys = mp_ioapics[i].mp_apicaddr;
+#ifdef CONFIG_X86_32
+ if (!ioapic_phys) {
+ printk(KERN_ERR
+ "WARNING: bogus zero IO-APIC "
+ "address found in MPTABLE, "
+ "disabling IO/APIC support!\n");
+ smp_found_config = 0;
+ skip_ioapic_setup = 1;
+ goto fake_ioapic_page;
+ }
+#endif
} else {
+#ifdef CONFIG_X86_32
+fake_ioapic_page:
+#endif
ioapic_phys = (unsigned long)
alloc_bootmem_pages(PAGE_SIZE);
ioapic_phys = __pa(ioapic_phys);
}
set_fixmap_nocache(idx, ioapic_phys);
apic_printk(APIC_VERBOSE,
- "mapped IOAPIC to %016lx (%016lx)\n",
+ "mapped IOAPIC to %08lx (%08lx)\n",
__fix_to_virt(idx), ioapic_phys);
idx++;
@@ -2971,4 +3894,3 @@ static int __init ioapic_insert_resources(void)
/* Insert the IO APIC resources after PCI initialization has occured to handle
* IO APICS that are mapped in on a BAR in PCI space. */
late_initcall(ioapic_insert_resources);
-
diff --git a/arch/x86/kernel/io_apic_32.c b/arch/x86/kernel/io_apic_32.c
deleted file mode 100644
index e710289f673..00000000000
--- a/arch/x86/kernel/io_apic_32.c
+++ /dev/null
@@ -1,2908 +0,0 @@
-/*
- * Intel IO-APIC support for multi-Pentium hosts.
- *
- * Copyright (C) 1997, 1998, 1999, 2000 Ingo Molnar, Hajnalka Szabo
- *
- * Many thanks to Stig Venaas for trying out countless experimental
- * patches and reporting/debugging problems patiently!
- *
- * (c) 1999, Multiple IO-APIC support, developed by
- * Ken-ichi Yaku <yaku@css1.kbnes.nec.co.jp> and
- * Hidemi Kishimoto <kisimoto@css1.kbnes.nec.co.jp>,
- * further tested and cleaned up by Zach Brown <zab@redhat.com>
- * and Ingo Molnar <mingo@redhat.com>
- *
- * Fixes
- * Maciej W. Rozycki : Bits for genuine 82489DX APICs;
- * thanks to Eric Gilmore
- * and Rolf G. Tews
- * for testing these extensively
- * Paul Diefenbaugh : Added full ACPI support
- */
-
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/sched.h>
-#include <linux/bootmem.h>
-#include <linux/mc146818rtc.h>
-#include <linux/compiler.h>
-#include <linux/acpi.h>
-#include <linux/module.h>
-#include <linux/sysdev.h>
-#include <linux/pci.h>
-#include <linux/msi.h>
-#include <linux/htirq.h>
-#include <linux/freezer.h>
-#include <linux/kthread.h>
-#include <linux/jiffies.h> /* time_after() */
-
-#include <asm/io.h>
-#include <asm/smp.h>
-#include <asm/desc.h>
-#include <asm/timer.h>
-#include <asm/i8259.h>
-#include <asm/nmi.h>
-#include <asm/msidef.h>
-#include <asm/hypertransport.h>
-#include <asm/setup.h>
-
-#include <mach_apic.h>
-#include <mach_apicdef.h>
-
-#define __apicdebuginit(type) static type __init
-
-int (*ioapic_renumber_irq)(int ioapic, int irq);
-atomic_t irq_mis_count;
-
-/* Where if anywhere is the i8259 connect in external int mode */
-static struct { int pin, apic; } ioapic_i8259 = { -1, -1 };
-
-static DEFINE_SPINLOCK(ioapic_lock);
-DEFINE_SPINLOCK(vector_lock);
-
-int timer_through_8259 __initdata;
-
-/*
- * Is the SiS APIC rmw bug present ?
- * -1 = don't know, 0 = no, 1 = yes
- */
-int sis_apic_bug = -1;
-
-/*
- * # of IRQ routing registers
- */
-int nr_ioapic_registers[MAX_IO_APICS];
-
-/* I/O APIC entries */
-struct mp_config_ioapic mp_ioapics[MAX_IO_APICS];
-int nr_ioapics;
-
-/* MP IRQ source entries */
-struct mp_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
-
-/* # of MP IRQ source entries */
-int mp_irq_entries;
-
-#if defined (CONFIG_MCA) || defined (CONFIG_EISA)
-int mp_bus_id_to_type[MAX_MP_BUSSES];
-#endif
-
-DECLARE_BITMAP(mp_bus_not_pci, MAX_MP_BUSSES);
-
-static int disable_timer_pin_1 __initdata;
-
-/*
- * Rough estimation of how many shared IRQs there are, can
- * be changed anytime.
- */
-#define MAX_PLUS_SHARED_IRQS NR_IRQS
-#define PIN_MAP_SIZE (MAX_PLUS_SHARED_IRQS + NR_IRQS)
-
-/*
- * This is performance-critical, we want to do it O(1)
- *
- * the indexing order of this array favors 1:1 mappings
- * between pins and IRQs.
- */
-
-static struct irq_pin_list {
- int apic, pin, next;
-} irq_2_pin[PIN_MAP_SIZE];
-
-struct io_apic {
- unsigned int index;
- unsigned int unused[3];
- unsigned int data;
-};
-
-static __attribute_const__ struct io_apic __iomem *io_apic_base(int idx)
-{
- return (void __iomem *) __fix_to_virt(FIX_IO_APIC_BASE_0 + idx)
- + (mp_ioapics[idx].mp_apicaddr & ~PAGE_MASK);
-}
-
-static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg)
-{
- struct io_apic __iomem *io_apic = io_apic_base(apic);
- writel(reg, &io_apic->index);
- return readl(&io_apic->data);
-}
-
-static inline void io_apic_write(unsigned int apic, unsigned int reg, unsigned int value)
-{
- struct io_apic __iomem *io_apic = io_apic_base(apic);
- writel(reg, &io_apic->index);
- writel(value, &io_apic->data);
-}
-
-/*
- * Re-write a value: to be used for read-modify-write
- * cycles where the read already set up the index register.
- *
- * Older SiS APIC requires we rewrite the index register
- */
-static inline void io_apic_modify(unsigned int apic, unsigned int reg, unsigned int value)
-{
- volatile struct io_apic __iomem *io_apic = io_apic_base(apic);
- if (sis_apic_bug)
- writel(reg, &io_apic->index);
- writel(value, &io_apic->data);
-}
-
-union entry_union {
- struct { u32 w1, w2; };
- struct IO_APIC_route_entry entry;
-};
-
-static struct IO_APIC_route_entry ioapic_read_entry(int apic, int pin)
-{
- union entry_union eu;
- unsigned long flags;
- spin_lock_irqsave(&ioapic_lock, flags);
- eu.w1 = io_apic_read(apic, 0x10 + 2 * pin);
- eu.w2 = io_apic_read(apic, 0x11 + 2 * pin);
- spin_unlock_irqrestore(&ioapic_lock, flags);
- return eu.entry;
-}
-
-/*
- * When we write a new IO APIC routing entry, we need to write the high
- * word first! If the mask bit in the low word is clear, we will enable
- * the interrupt, and we need to make sure the entry is fully populated
- * before that happens.
- */
-static void
-__ioapic_write_entry(int apic, int pin, struct IO_APIC_route_entry e)
-{
- union entry_union eu;
- eu.entry = e;
- io_apic_write(apic, 0x11 + 2*pin, eu.w2);
- io_apic_write(apic, 0x10 + 2*pin, eu.w1);
-}
-
-static void ioapic_write_entry(int apic, int pin, struct IO_APIC_route_entry e)
-{
- unsigned long flags;
- spin_lock_irqsave(&ioapic_lock, flags);
- __ioapic_write_entry(apic, pin, e);
- spin_unlock_irqrestore(&ioapic_lock, flags);
-}
-
-/*
- * When we mask an IO APIC routing entry, we need to write the low
- * word first, in order to set the mask bit before we change the
- * high bits!
- */
-static void ioapic_mask_entry(int apic, int pin)
-{
- unsigned long flags;
- union entry_union eu = { .entry.mask = 1 };
-
- spin_lock_irqsave(&ioapic_lock, flags);
- io_apic_write(apic, 0x10 + 2*pin, eu.w1);
- io_apic_write(apic, 0x11 + 2*pin, eu.w2);
- spin_unlock_irqrestore(&ioapic_lock, flags);
-}
-
-/*
- * The common case is 1:1 IRQ<->pin mappings. Sometimes there are
- * shared ISA-space IRQs, so we have to support them. We are super
- * fast in the common case, and fast for shared ISA-space IRQs.
- */
-static void add_pin_to_irq(unsigned int irq, int apic, int pin)
-{
- static int first_free_entry = NR_IRQS;
- struct irq_pin_list *entry = irq_2_pin + irq;
-
- while (entry->next)
- entry = irq_2_pin + entry->next;
-
- if (entry->pin != -1) {
- entry->next = first_free_entry;
- entry = irq_2_pin + entry->next;
- if (++first_free_entry >= PIN_MAP_SIZE)
- panic("io_apic.c: whoops");
- }
- entry->apic = apic;
- entry->pin = pin;
-}
-
-/*
- * Reroute an IRQ to a different pin.
- */
-static void __init replace_pin_at_irq(unsigned int irq,
- int oldapic, int oldpin,
- int newapic, int newpin)
-{
- struct irq_pin_list *entry = irq_2_pin + irq;
-
- while (1) {
- if (entry->apic == oldapic && entry->pin == oldpin) {
- entry->apic = newapic;
- entry->pin = newpin;
- }
- if (!entry->next)
- break;
- entry = irq_2_pin + entry->next;
- }
-}
-
-static void __modify_IO_APIC_irq(unsigned int irq, unsigned long enable, unsigned long disable)
-{
- struct irq_pin_list *entry = irq_2_pin + irq;
- unsigned int pin, reg;
-
- for (;;) {
- pin = entry->pin;
- if (pin == -1)
- break;
- reg = io_apic_read(entry->apic, 0x10 + pin*2);
- reg &= ~disable;
- reg |= enable;
- io_apic_modify(entry->apic, 0x10 + pin*2, reg);
- if (!entry->next)
- break;
- entry = irq_2_pin + entry->next;
- }
-}
-
-/* mask = 1 */
-static void __mask_IO_APIC_irq(unsigned int irq)
-{
- __modify_IO_APIC_irq(irq, IO_APIC_REDIR_MASKED, 0);
-}
-
-/* mask = 0 */
-static void __unmask_IO_APIC_irq(unsigned int irq)
-{
- __modify_IO_APIC_irq(irq, 0, IO_APIC_REDIR_MASKED);
-}
-
-/* mask = 1, trigger = 0 */
-static void __mask_and_edge_IO_APIC_irq(unsigned int irq)
-{
- __modify_IO_APIC_irq(irq, IO_APIC_REDIR_MASKED,
- IO_APIC_REDIR_LEVEL_TRIGGER);
-}
-
-/* mask = 0, trigger = 1 */
-static void __unmask_and_level_IO_APIC_irq(unsigned int irq)
-{
- __modify_IO_APIC_irq(irq, IO_APIC_REDIR_LEVEL_TRIGGER,
- IO_APIC_REDIR_MASKED);
-}
-
-static void mask_IO_APIC_irq(unsigned int irq)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&ioapic_lock, flags);
- __mask_IO_APIC_irq(irq);
- spin_unlock_irqrestore(&ioapic_lock, flags);
-}
-
-static void unmask_IO_APIC_irq(unsigned int irq)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&ioapic_lock, flags);
- __unmask_IO_APIC_irq(irq);
- spin_unlock_irqrestore(&ioapic_lock, flags);
-}
-
-static void clear_IO_APIC_pin(unsigned int apic, unsigned int pin)
-{
- struct IO_APIC_route_entry entry;
-
- /* Check delivery_mode to be sure we're not clearing an SMI pin */
- entry = ioapic_read_entry(apic, pin);
- if (entry.delivery_mode == dest_SMI)
- return;
-
- /*
- * Disable it in the IO-APIC irq-routing table:
- */
- ioapic_mask_entry(apic, pin);
-}
-
-static void clear_IO_APIC(void)
-{
- int apic, pin;
-
- for (apic = 0; apic < nr_ioapics; apic++)
- for (pin = 0; pin < nr_ioapic_registers[apic]; pin++)
- clear_IO_APIC_pin(apic, pin);
-}
-
-#ifdef CONFIG_SMP
-static void set_ioapic_affinity_irq(unsigned int irq, cpumask_t cpumask)
-{
- unsigned long flags;
- int pin;
- struct irq_pin_list *entry = irq_2_pin + irq;
- unsigned int apicid_value;
- cpumask_t tmp;
-
- cpus_and(tmp, cpumask, cpu_online_map);
- if (cpus_empty(tmp))
- tmp = TARGET_CPUS;
-
- cpus_and(cpumask, tmp, CPU_MASK_ALL);
-
- apicid_value = cpu_mask_to_apicid(cpumask);
- /* Prepare to do the io_apic_write */
- apicid_value = apicid_value << 24;
- spin_lock_irqsave(&ioapic_lock, flags);
- for (;;) {
- pin = entry->pin;
- if (pin == -1)
- break;
- io_apic_write(entry->apic, 0x10 + 1 + pin*2, apicid_value);
- if (!entry->next)
- break;
- entry = irq_2_pin + entry->next;
- }
- irq_desc[irq].affinity = cpumask;
- spin_unlock_irqrestore(&ioapic_lock, flags);
-}
-
-#if defined(CONFIG_IRQBALANCE)
-# include <asm/processor.h> /* kernel_thread() */
-# include <linux/kernel_stat.h> /* kstat */
-# include <linux/slab.h> /* kmalloc() */
-# include <linux/timer.h>
-
-#define IRQBALANCE_CHECK_ARCH -999
-#define MAX_BALANCED_IRQ_INTERVAL (5*HZ)
-#define MIN_BALANCED_IRQ_INTERVAL (HZ/2)
-#define BALANCED_IRQ_MORE_DELTA (HZ/10)
-#define BALANCED_IRQ_LESS_DELTA (HZ)
-
-static int irqbalance_disabled __read_mostly = IRQBALANCE_CHECK_ARCH;
-static int physical_balance __read_mostly;
-static long balanced_irq_interval __read_mostly = MAX_BALANCED_IRQ_INTERVAL;
-
-static struct irq_cpu_info {
- unsigned long *last_irq;
- unsigned long *irq_delta;
- unsigned long irq;
-} irq_cpu_data[NR_CPUS];
-
-#define CPU_IRQ(cpu) (irq_cpu_data[cpu].irq)
-#define LAST_CPU_IRQ(cpu, irq) (irq_cpu_data[cpu].last_irq[irq])
-#define IRQ_DELTA(cpu, irq) (irq_cpu_data[cpu].irq_delta[irq])
-
-#define IDLE_ENOUGH(cpu,now) \
- (idle_cpu(cpu) && ((now) - per_cpu(irq_stat, (cpu)).idle_timestamp > 1))
-
-#define IRQ_ALLOWED(cpu, allowed_mask) cpu_isset(cpu, allowed_mask)
-
-#define CPU_TO_PACKAGEINDEX(i) (first_cpu(per_cpu(cpu_sibling_map, i)))
-
-static cpumask_t balance_irq_affinity[NR_IRQS] = {
- [0 ... NR_IRQS-1] = CPU_MASK_ALL
-};
-
-void set_balance_irq_affinity(unsigned int irq, cpumask_t mask)
-{
- balance_irq_affinity[irq] = mask;
-}
-
-static unsigned long move(int curr_cpu, cpumask_t allowed_mask,
- unsigned long now, int direction)
-{
- int search_idle = 1;
- int cpu = curr_cpu;
-
- goto inside;
-
- do {
- if (unlikely(cpu == curr_cpu))
- search_idle = 0;
-inside:
- if (direction == 1) {
- cpu++;
- if (cpu >= NR_CPUS)
- cpu = 0;
- } else {
- cpu--;
- if (cpu == -1)
- cpu = NR_CPUS-1;
- }
- } while (!cpu_online(cpu) || !IRQ_ALLOWED(cpu, allowed_mask) ||
- (search_idle && !IDLE_ENOUGH(cpu, now)));
-
- return cpu;
-}
-
-static inline void balance_irq(int cpu, int irq)
-{
- unsigned long now = jiffies;
- cpumask_t allowed_mask;
- unsigned int new_cpu;
-
- if (irqbalance_disabled)
- return;
-
- cpus_and(allowed_mask, cpu_online_map, balance_irq_affinity[irq]);
- new_cpu = move(cpu, allowed_mask, now, 1);
- if (cpu != new_cpu)
- set_pending_irq(irq, cpumask_of_cpu(new_cpu));
-}
-
-static inline void rotate_irqs_among_cpus(unsigned long useful_load_threshold)
-{
- int i, j;
-
- for_each_online_cpu(i) {
- for (j = 0; j < NR_IRQS; j++) {
- if (!irq_desc[j].action)
- continue;
- /* Is it a significant load ? */
- if (IRQ_DELTA(CPU_TO_PACKAGEINDEX(i), j) <
- useful_load_threshold)
- continue;
- balance_irq(i, j);
- }
- }
- balanced_irq_interval = max((long)MIN_BALANCED_IRQ_INTERVAL,
- balanced_irq_interval - BALANCED_IRQ_LESS_DELTA);
- return;
-}
-
-static void do_irq_balance(void)
-{
- int i, j;
- unsigned long max_cpu_irq = 0, min_cpu_irq = (~0);
- unsigned long move_this_load = 0;
- int max_loaded = 0, min_loaded = 0;
- int load;
- unsigned long useful_load_threshold = balanced_irq_interval + 10;
- int selected_irq;
- int tmp_loaded, first_attempt = 1;
- unsigned long tmp_cpu_irq;
- unsigned long imbalance = 0;
- cpumask_t allowed_mask, target_cpu_mask, tmp;
-
- for_each_possible_cpu(i) {
- int package_index;
- CPU_IRQ(i) = 0;
- if (!cpu_online(i))
- continue;
- package_index = CPU_TO_PACKAGEINDEX(i);
- for (j = 0; j < NR_IRQS; j++) {
- unsigned long value_now, delta;
- /* Is this an active IRQ or balancing disabled ? */
- if (!irq_desc[j].action || irq_balancing_disabled(j))
- continue;
- if (package_index == i)
- IRQ_DELTA(package_index, j) = 0;
- /* Determine the total count per processor per IRQ */
- value_now = (unsigned long) kstat_cpu(i).irqs[j];
-
- /* Determine the activity per processor per IRQ */
- delta = value_now - LAST_CPU_IRQ(i, j);
-
- /* Update last_cpu_irq[][] for the next time */
- LAST_CPU_IRQ(i, j) = value_now;
-
- /* Ignore IRQs whose rate is less than the clock */
- if (delta < useful_load_threshold)
- continue;
- /* update the load for the processor or package total */
- IRQ_DELTA(package_index, j) += delta;
-
- /* Keep track of the higher numbered sibling as well */
- if (i != package_index)
- CPU_IRQ(i) += delta;
- /*
- * We have sibling A and sibling B in the package
- *
- * cpu_irq[A] = load for cpu A + load for cpu B
- * cpu_irq[B] = load for cpu B
- */
- CPU_IRQ(package_index) += delta;
- }
- }
- /* Find the least loaded processor package */
- for_each_online_cpu(i) {
- if (i != CPU_TO_PACKAGEINDEX(i))
- continue;
- if (min_cpu_irq > CPU_IRQ(i)) {
- min_cpu_irq = CPU_IRQ(i);
- min_loaded = i;
- }
- }
- max_cpu_irq = ULONG_MAX;
-
-tryanothercpu:
- /*
- * Look for heaviest loaded processor.
- * We may come back to get the next heaviest loaded processor.
- * Skip processors with trivial loads.
- */
- tmp_cpu_irq = 0;
- tmp_loaded = -1;
- for_each_online_cpu(i) {
- if (i != CPU_TO_PACKAGEINDEX(i))
- continue;
- if (max_cpu_irq <= CPU_IRQ(i))
- continue;
- if (tmp_cpu_irq < CPU_IRQ(i)) {
- tmp_cpu_irq = CPU_IRQ(i);
- tmp_loaded = i;
- }
- }
-
- if (tmp_loaded == -1) {
- /*
- * In the case of small number of heavy interrupt sources,
- * loading some of the cpus too much. We use Ingo's original
- * approach to rotate them around.
- */
- if (!first_attempt && imbalance >= useful_load_threshold) {
- rotate_irqs_among_cpus(useful_load_threshold);
- return;
- }
- goto not_worth_the_effort;
- }
-
- first_attempt = 0; /* heaviest search */
- max_cpu_irq = tmp_cpu_irq; /* load */
- max_loaded = tmp_loaded; /* processor */
- imbalance = (max_cpu_irq - min_cpu_irq) / 2;
-
- /*
- * if imbalance is less than approx 10% of max load, then
- * observe diminishing returns action. - quit
- */
- if (imbalance < (max_cpu_irq >> 3))
- goto not_worth_the_effort;
-
-tryanotherirq:
- /* if we select an IRQ to move that can't go where we want, then
- * see if there is another one to try.
- */
- move_this_load = 0;
- selected_irq = -1;
- for (j = 0; j < NR_IRQS; j++) {
- /* Is this an active IRQ? */
- if (!irq_desc[j].action)
- continue;
- if (imbalance <= IRQ_DELTA(max_loaded, j))
- continue;
- /* Try to find the IRQ that is closest to the imbalance
- * without going over.
- */
- if (move_this_load < IRQ_DELTA(max_loaded, j)) {
- move_this_load = IRQ_DELTA(max_loaded, j);
- selected_irq = j;
- }
- }
- if (selected_irq == -1)
- goto tryanothercpu;
-
- imbalance = move_this_load;
-
- /* For physical_balance case, we accumulated both load
- * values in the one of the siblings cpu_irq[],
- * to use the same code for physical and logical processors
- * as much as possible.
- *
- * NOTE: the cpu_irq[] array holds the sum of the load for
- * sibling A and sibling B in the slot for the lowest numbered
- * sibling (A), _AND_ the load for sibling B in the slot for
- * the higher numbered sibling.
- *
- * We seek the least loaded sibling by making the comparison
- * (A+B)/2 vs B
- */
- load = CPU_IRQ(min_loaded) >> 1;
- for_each_cpu_mask(j, per_cpu(cpu_sibling_map, min_loaded)) {
- if (load > CPU_IRQ(j)) {
- /* This won't change cpu_sibling_map[min_loaded] */
- load = CPU_IRQ(j);
- min_loaded = j;
- }
- }
-
- cpus_and(allowed_mask,
- cpu_online_map,
- balance_irq_affinity[selected_irq]);
- target_cpu_mask = cpumask_of_cpu(min_loaded);
- cpus_and(tmp, target_cpu_mask, allowed_mask);
-
- if (!cpus_empty(tmp)) {
- /* mark for change destination */
- set_pending_irq(selected_irq, cpumask_of_cpu(min_loaded));
-
- /* Since we made a change, come back sooner to
- * check for more variation.
- */
- balanced_irq_interval = max((long)MIN_BALANCED_IRQ_INTERVAL,
- balanced_irq_interval - BALANCED_IRQ_LESS_DELTA);
- return;
- }
- goto tryanotherirq;
-
-not_worth_the_effort:
- /*
- * if we did not find an IRQ to move, then adjust the time interval
- * upward
- */
- balanced_irq_interval = min((long)MAX_BALANCED_IRQ_INTERVAL,
- balanced_irq_interval + BALANCED_IRQ_MORE_DELTA);
- return;
-}
-
-static int balanced_irq(void *unused)
-{
- int i;
- unsigned long prev_balance_time = jiffies;
- long time_remaining = balanced_irq_interval;
-
- /* push everything to CPU 0 to give us a starting point. */
- for (i = 0 ; i < NR_IRQS ; i++) {
- irq_desc[i].pending_mask = cpumask_of_cpu(0);
- set_pending_irq(i, cpumask_of_cpu(0));
- }
-
- set_freezable();
- for ( ; ; ) {
- time_remaining = schedule_timeout_interruptible(time_remaining);
- try_to_freeze();
- if (time_after(jiffies,
- prev_balance_time+balanced_irq_interval)) {
- preempt_disable();
- do_irq_balance();
- prev_balance_time = jiffies;
- time_remaining = balanced_irq_interval;
- preempt_enable();
- }
- }
- return 0;
-}
-
-static int __init balanced_irq_init(void)
-{
- int i;
- struct cpuinfo_x86 *c;
- cpumask_t tmp;
-
- cpus_shift_right(tmp, cpu_online_map, 2);
- c = &boot_cpu_data;
- /* When not overwritten by the command line ask subarchitecture. */
- if (irqbalance_disabled == IRQBALANCE_CHECK_ARCH)
- irqbalance_disabled = NO_BALANCE_IRQ;
- if (irqbalance_disabled)
- return 0;
-
- /* disable irqbalance completely if there is only one processor online */
- if (num_online_cpus() < 2) {
- irqbalance_disabled = 1;
- return 0;
- }
- /*
- * Enable physical balance only if more than 1 physical processor
- * is present
- */
- if (smp_num_siblings > 1 && !cpus_empty(tmp))
- physical_balance = 1;
-
- for_each_online_cpu(i) {
- irq_cpu_data[i].irq_delta = kzalloc(sizeof(unsigned long) * NR_IRQS, GFP_KERNEL);
- irq_cpu_data[i].last_irq = kzalloc(sizeof(unsigned long) * NR_IRQS, GFP_KERNEL);
- if (irq_cpu_data[i].irq_delta == NULL || irq_cpu_data[i].last_irq == NULL) {
- printk(KERN_ERR "balanced_irq_init: out of memory");
- goto failed;
- }
- }
-
- printk(KERN_INFO "Starting balanced_irq\n");
- if (!IS_ERR(kthread_run(balanced_irq, NULL, "kirqd")))
- return 0;
- printk(KERN_ERR "balanced_irq_init: failed to spawn balanced_irq");
-failed:
- for_each_possible_cpu(i) {
- kfree(irq_cpu_data[i].irq_delta);
- irq_cpu_data[i].irq_delta = NULL;
- kfree(irq_cpu_data[i].last_irq);
- irq_cpu_data[i].last_irq = NULL;
- }
- return 0;
-}
-
-int __devinit irqbalance_disable(char *str)
-{
- irqbalance_disabled = 1;
- return 1;
-}
-
-__setup("noirqbalance", irqbalance_disable);
-
-late_initcall(balanced_irq_init);
-#endif /* CONFIG_IRQBALANCE */
-#endif /* CONFIG_SMP */
-
-#ifndef CONFIG_SMP
-void send_IPI_self(int vector)
-{
- unsigned int cfg;
-
- /*
- * Wait for idle.
- */
- apic_wait_icr_idle();
- cfg = APIC_DM_FIXED | APIC_DEST_SELF | vector | APIC_DEST_LOGICAL;
- /*
- * Send the IPI. The write to APIC_ICR fires this off.
- */
- apic_write(APIC_ICR, cfg);
-}
-#endif /* !CONFIG_SMP */
-
-
-/*
- * support for broken MP BIOSs, enables hand-redirection of PIRQ0-7 to
- * specific CPU-side IRQs.
- */
-
-#define MAX_PIRQS 8
-static int pirq_entries [MAX_PIRQS];
-static int pirqs_enabled;
-int skip_ioapic_setup;
-
-static int __init ioapic_pirq_setup(char *str)
-{
- int i, max;
- int ints[MAX_PIRQS+1];
-
- get_options(str, ARRAY_SIZE(ints), ints);
-
- for (i = 0; i < MAX_PIRQS; i++)
- pirq_entries[i] = -1;
-
- pirqs_enabled = 1;
- apic_printk(APIC_VERBOSE, KERN_INFO
- "PIRQ redirection, working around broken MP-BIOS.\n");
- max = MAX_PIRQS;
- if (ints[0] < MAX_PIRQS)
- max = ints[0];
-
- for (i = 0; i < max; i++) {
- apic_printk(APIC_VERBOSE, KERN_DEBUG
- "... PIRQ%d -> IRQ %d\n", i, ints[i+1]);
- /*
- * PIRQs are mapped upside down, usually.
- */
- pirq_entries[MAX_PIRQS-i-1] = ints[i+1];
- }
- return 1;
-}
-
-__setup("pirq=", ioapic_pirq_setup);
-
-/*
- * Find the IRQ entry number of a certain pin.
- */
-static int find_irq_entry(int apic, int pin, int type)
-{
- int i;
-
- for (i = 0; i < mp_irq_entries; i++)
- if (mp_irqs[i].mp_irqtype == type &&
- (mp_irqs[i].mp_dstapic == mp_ioapics[apic].mp_apicid ||
- mp_irqs[i].mp_dstapic == MP_APIC_ALL) &&
- mp_irqs[i].mp_dstirq == pin)
- return i;
-
- return -1;
-}
-
-/*
- * Find the pin to which IRQ[irq] (ISA) is connected
- */
-static int __init find_isa_irq_pin(int irq, int type)
-{
- int i;
-
- for (i = 0; i < mp_irq_entries; i++) {
- int lbus = mp_irqs[i].mp_srcbus;
-
- if (test_bit(lbus, mp_bus_not_pci) &&
- (mp_irqs[i].mp_irqtype == type) &&
- (mp_irqs[i].mp_srcbusirq == irq))
-
- return mp_irqs[i].mp_dstirq;
- }
- return -1;
-}
-
-static int __init find_isa_irq_apic(int irq, int type)
-{
- int i;
-
- for (i = 0; i < mp_irq_entries; i++) {
- int lbus = mp_irqs[i].mp_srcbus;
-
- if (test_bit(lbus, mp_bus_not_pci) &&
- (mp_irqs[i].mp_irqtype == type) &&
- (mp_irqs[i].mp_srcbusirq == irq))
- break;
- }
- if (i < mp_irq_entries) {
- int apic;
- for (apic = 0; apic < nr_ioapics; apic++) {
- if (mp_ioapics[apic].mp_apicid == mp_irqs[i].mp_dstapic)
- return apic;
- }
- }
-
- return -1;
-}
-
-/*
- * Find a specific PCI IRQ entry.
- * Not an __init, possibly needed by modules
- */
-static int pin_2_irq(int idx, int apic, int pin);
-
-int IO_APIC_get_PCI_irq_vector(int bus, int slot, int pin)
-{
- int apic, i, best_guess = -1;
-
- apic_printk(APIC_DEBUG, "querying PCI -> IRQ mapping bus:%d, "
- "slot:%d, pin:%d.\n", bus, slot, pin);
- if (test_bit(bus, mp_bus_not_pci)) {
- printk(KERN_WARNING "PCI BIOS passed nonexistent PCI bus %d!\n", bus);
- return -1;
- }
- for (i = 0; i < mp_irq_entries; i++) {
- int lbus = mp_irqs[i].mp_srcbus;
-
- for (apic = 0; apic < nr_ioapics; apic++)
- if (mp_ioapics[apic].mp_apicid == mp_irqs[i].mp_dstapic ||
- mp_irqs[i].mp_dstapic == MP_APIC_ALL)
- break;
-
- if (!test_bit(lbus, mp_bus_not_pci) &&
- !mp_irqs[i].mp_irqtype &&
- (bus == lbus) &&
- (slot == ((mp_irqs[i].mp_srcbusirq >> 2) & 0x1f))) {
- int irq = pin_2_irq(i, apic, mp_irqs[i].mp_dstirq);
-
- if (!(apic || IO_APIC_IRQ(irq)))
- continue;
-
- if (pin == (mp_irqs[i].mp_srcbusirq & 3))
- return irq;
- /*
- * Use the first all-but-pin matching entry as a
- * best-guess fuzzy result for broken mptables.
- */
- if (best_guess < 0)
- best_guess = irq;
- }
- }
- return best_guess;
-}
-EXPORT_SYMBOL(IO_APIC_get_PCI_irq_vector);
-
-/*
- * This function currently is only a helper for the i386 smp boot process where
- * we need to reprogram the ioredtbls to cater for the cpus which have come online
- * so mask in all cases should simply be TARGET_CPUS
- */
-#ifdef CONFIG_SMP
-void __init setup_ioapic_dest(void)
-{
- int pin, ioapic, irq, irq_entry;
-
- if (skip_ioapic_setup == 1)
- return;
-
- for (ioapic = 0; ioapic < nr_ioapics; ioapic++) {
- for (pin = 0; pin < nr_ioapic_registers[ioapic]; pin++) {
- irq_entry = find_irq_entry(ioapic, pin, mp_INT);
- if (irq_entry == -1)
- continue;
- irq = pin_2_irq(irq_entry, ioapic, pin);
- set_ioapic_affinity_irq(irq, TARGET_CPUS);
- }
-
- }
-}
-#endif
-
-#if defined(CONFIG_EISA) || defined(CONFIG_MCA)
-/*
- * EISA Edge/Level control register, ELCR
- */
-static int EISA_ELCR(unsigned int irq)
-{
- if (irq < 16) {
- unsigned int port = 0x4d0 + (irq >> 3);
- return (inb(port) >> (irq & 7)) & 1;
- }
- apic_printk(APIC_VERBOSE, KERN_INFO
- "Broken MPtable reports ISA irq %d\n", irq);
- return 0;
-}
-#endif
-
-/* ISA interrupts are always polarity zero edge triggered,
- * when listed as conforming in the MP table. */
-
-#define default_ISA_trigger(idx) (0)
-#define default_ISA_polarity(idx) (0)
-
-/* EISA interrupts are always polarity zero and can be edge or level
- * trigger depending on the ELCR value. If an interrupt is listed as
- * EISA conforming in the MP table, that means its trigger type must
- * be read in from the ELCR */
-
-#define default_EISA_trigger(idx) (EISA_ELCR(mp_irqs[idx].mp_srcbusirq))
-#define default_EISA_polarity(idx) default_ISA_polarity(idx)
-
-/* PCI interrupts are always polarity one level triggered,
- * when listed as conforming in the MP table. */
-
-#define default_PCI_trigger(idx) (1)
-#define default_PCI_polarity(idx) (1)
-
-/* MCA interrupts are always polarity zero level triggered,
- * when listed as conforming in the MP table. */
-
-#define default_MCA_trigger(idx) (1)
-#define default_MCA_polarity(idx) default_ISA_polarity(idx)
-
-static int MPBIOS_polarity(int idx)
-{
- int bus = mp_irqs[idx].mp_srcbus;
- int polarity;
-
- /*
- * Determine IRQ line polarity (high active or low active):
- */
- switch (mp_irqs[idx].mp_irqflag & 3) {
- case 0: /* conforms, ie. bus-type dependent polarity */
- {
- polarity = test_bit(bus, mp_bus_not_pci)?
- default_ISA_polarity(idx):
- default_PCI_polarity(idx);
- break;
- }
- case 1: /* high active */
- {
- polarity = 0;
- break;
- }
- case 2: /* reserved */
- {
- printk(KERN_WARNING "broken BIOS!!\n");
- polarity = 1;
- break;
- }
- case 3: /* low active */
- {
- polarity = 1;
- break;
- }
- default: /* invalid */
- {
- printk(KERN_WARNING "broken BIOS!!\n");
- polarity = 1;
- break;
- }
- }
- return polarity;
-}
-
-static int MPBIOS_trigger(int idx)
-{
- int bus = mp_irqs[idx].mp_srcbus;
- int trigger;
-
- /*
- * Determine IRQ trigger mode (edge or level sensitive):
- */
- switch ((mp_irqs[idx].mp_irqflag>>2) & 3) {
- case 0: /* conforms, ie. bus-type dependent */
- {
- trigger = test_bit(bus, mp_bus_not_pci)?
- default_ISA_trigger(idx):
- default_PCI_trigger(idx);
-#if defined(CONFIG_EISA) || defined(CONFIG_MCA)
- switch (mp_bus_id_to_type[bus]) {
- case MP_BUS_ISA: /* ISA pin */
- {
- /* set before the switch */
- break;
- }
- case MP_BUS_EISA: /* EISA pin */
- {
- trigger = default_EISA_trigger(idx);
- break;
- }
- case MP_BUS_PCI: /* PCI pin */
- {
- /* set before the switch */
- break;
- }
- case MP_BUS_MCA: /* MCA pin */
- {
- trigger = default_MCA_trigger(idx);
- break;
- }
- default:
- {
- printk(KERN_WARNING "broken BIOS!!\n");
- trigger = 1;
- break;
- }
- }
-#endif
- break;
- }
- case 1: /* edge */
- {
- trigger = 0;
- break;
- }
- case 2: /* reserved */
- {
- printk(KERN_WARNING "broken BIOS!!\n");
- trigger = 1;
- break;
- }
- case 3: /* level */
- {
- trigger = 1;
- break;
- }
- default: /* invalid */
- {
- printk(KERN_WARNING "broken BIOS!!\n");
- trigger = 0;
- break;
- }
- }
- return trigger;
-}
-
-static inline int irq_polarity(int idx)
-{
- return MPBIOS_polarity(idx);
-}
-
-static inline int irq_trigger(int idx)
-{
- return MPBIOS_trigger(idx);
-}
-
-static int pin_2_irq(int idx, int apic, int pin)
-{
- int irq, i;
- int bus = mp_irqs[idx].mp_srcbus;
-
- /*
- * Debugging check, we are in big trouble if this message pops up!
- */
- if (mp_irqs[idx].mp_dstirq != pin)
- printk(KERN_ERR "broken BIOS or MPTABLE parser, ayiee!!\n");
-
- if (test_bit(bus, mp_bus_not_pci))
- irq = mp_irqs[idx].mp_srcbusirq;
- else {
- /*
- * PCI IRQs are mapped in order
- */
- i = irq = 0;
- while (i < apic)
- irq += nr_ioapic_registers[i++];
- irq += pin;
-
- /*
- * For MPS mode, so far only needed by ES7000 platform
- */
- if (ioapic_renumber_irq)
- irq = ioapic_renumber_irq(apic, irq);
- }
-
- /*
- * PCI IRQ command line redirection. Yes, limits are hardcoded.
- */
- if ((pin >= 16) && (pin <= 23)) {
- if (pirq_entries[pin-16] != -1) {
- if (!pirq_entries[pin-16]) {
- apic_printk(APIC_VERBOSE, KERN_DEBUG
- "disabling PIRQ%d\n", pin-16);
- } else {
- irq = pirq_entries[pin-16];
- apic_printk(APIC_VERBOSE, KERN_DEBUG
- "using PIRQ%d -> IRQ %d\n",
- pin-16, irq);
- }
- }
- }
- return irq;
-}
-
-static inline int IO_APIC_irq_trigger(int irq)
-{
- int apic, idx, pin;
-
- for (apic = 0; apic < nr_ioapics; apic++) {
- for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) {
- idx = find_irq_entry(apic, pin, mp_INT);
- if ((idx != -1) && (irq == pin_2_irq(idx, apic, pin)))
- return irq_trigger(idx);
- }
- }
- /*
- * nonexistent IRQs are edge default
- */
- return 0;
-}
-
-/* irq_vectors is indexed by the sum of all RTEs in all I/O APICs. */
-static u8 irq_vector[NR_IRQ_VECTORS] __read_mostly = { FIRST_DEVICE_VECTOR , 0 };
-
-static int __assign_irq_vector(int irq)
-{
- static int current_vector = FIRST_DEVICE_VECTOR, current_offset;
- int vector, offset;
-
- BUG_ON((unsigned)irq >= NR_IRQ_VECTORS);
-
- if (irq_vector[irq] > 0)
- return irq_vector[irq];
-
- vector = current_vector;
- offset = current_offset;
-next:
- vector += 8;
- if (vector >= first_system_vector) {
- offset = (offset + 1) % 8;
- vector = FIRST_DEVICE_VECTOR + offset;
- }
- if (vector == current_vector)
- return -ENOSPC;
- if (test_and_set_bit(vector, used_vectors))
- goto next;
-
- current_vector = vector;
- current_offset = offset;
- irq_vector[irq] = vector;
-
- return vector;
-}
-
-static int assign_irq_vector(int irq)
-{
- unsigned long flags;
- int vector;
-
- spin_lock_irqsave(&vector_lock, flags);
- vector = __assign_irq_vector(irq);
- spin_unlock_irqrestore(&vector_lock, flags);
-
- return vector;
-}
-
-static struct irq_chip ioapic_chip;
-
-#define IOAPIC_AUTO -1
-#define IOAPIC_EDGE 0
-#define IOAPIC_LEVEL 1
-
-static void ioapic_register_intr(int irq, int vector, unsigned long trigger)
-{
- if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) ||
- trigger == IOAPIC_LEVEL) {
- irq_desc[irq].status |= IRQ_LEVEL;
- set_irq_chip_and_handler_name(irq, &ioapic_chip,
- handle_fasteoi_irq, "fasteoi");
- } else {
- irq_desc[irq].status &= ~IRQ_LEVEL;
- set_irq_chip_and_handler_name(irq, &ioapic_chip,
- handle_edge_irq, "edge");
- }
- set_intr_gate(vector, interrupt[irq]);
-}
-
-static void __init setup_IO_APIC_irqs(void)
-{
- struct IO_APIC_route_entry entry;
- int apic, pin, idx, irq, first_notcon = 1, vector;
-
- apic_printk(APIC_VERBOSE, KERN_DEBUG "init IO_APIC IRQs\n");
-
- for (apic = 0; apic < nr_ioapics; apic++) {
- for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) {
-
- /*
- * add it to the IO-APIC irq-routing table:
- */
- memset(&entry, 0, sizeof(entry));
-
- entry.delivery_mode = INT_DELIVERY_MODE;
- entry.dest_mode = INT_DEST_MODE;
- entry.mask = 0; /* enable IRQ */
- entry.dest.logical.logical_dest =
- cpu_mask_to_apicid(TARGET_CPUS);
-
- idx = find_irq_entry(apic, pin, mp_INT);
- if (idx == -1) {
- if (first_notcon) {
- apic_printk(APIC_VERBOSE, KERN_DEBUG
- " IO-APIC (apicid-pin) %d-%d",
- mp_ioapics[apic].mp_apicid,
- pin);
- first_notcon = 0;
- } else
- apic_printk(APIC_VERBOSE, ", %d-%d",
- mp_ioapics[apic].mp_apicid, pin);
- continue;
- }
-
- if (!first_notcon) {
- apic_printk(APIC_VERBOSE, " not connected.\n");
- first_notcon = 1;
- }
-
- entry.trigger = irq_trigger(idx);
- entry.polarity = irq_polarity(idx);
-
- if (irq_trigger(idx)) {
- entry.trigger = 1;
- entry.mask = 1;
- }
-
- irq = pin_2_irq(idx, apic, pin);
- /*
- * skip adding the timer int on secondary nodes, which causes
- * a small but painful rift in the time-space continuum
- */
- if (multi_timer_check(apic, irq))
- continue;
- else
- add_pin_to_irq(irq, apic, pin);
-
- if (!apic && !IO_APIC_IRQ(irq))
- continue;
-
- if (IO_APIC_IRQ(irq)) {
- vector = assign_irq_vector(irq);
- entry.vector = vector;
- ioapic_register_intr(irq, vector, IOAPIC_AUTO);
-
- if (!apic && (irq < 16))
- disable_8259A_irq(irq);
- }
- ioapic_write_entry(apic, pin, entry);
- }
- }
-
- if (!first_notcon)
- apic_printk(APIC_VERBOSE, " not connected.\n");
-}
-
-/*
- * Set up the timer pin, possibly with the 8259A-master behind.
- */
-static void __init setup_timer_IRQ0_pin(unsigned int apic, unsigned int pin,
- int vector)
-{
- struct IO_APIC_route_entry entry;
-
- memset(&entry, 0, sizeof(entry));
-
- /*
- * We use logical delivery to get the timer IRQ
- * to the first CPU.
- */
- entry.dest_mode = INT_DEST_MODE;
- entry.mask = 1; /* mask IRQ now */
- entry.dest.logical.logical_dest = cpu_mask_to_apicid(TARGET_CPUS);
- entry.delivery_mode = INT_DELIVERY_MODE;
- entry.polarity = 0;
- entry.trigger = 0;
- entry.vector = vector;
-
- /*
- * The timer IRQ doesn't have to know that behind the
- * scene we may have a 8259A-master in AEOI mode ...
- */
- ioapic_register_intr(0, vector, IOAPIC_EDGE);
-
- /*
- * Add it to the IO-APIC irq-routing table:
- */
- ioapic_write_entry(apic, pin, entry);
-}
-
-
-__apicdebuginit(void) print_IO_APIC(void)
-{
- int apic, i;
- union IO_APIC_reg_00 reg_00;
- union IO_APIC_reg_01 reg_01;
- union IO_APIC_reg_02 reg_02;
- union IO_APIC_reg_03 reg_03;
- unsigned long flags;
-
- if (apic_verbosity == APIC_QUIET)
- return;
-
- printk(KERN_DEBUG "number of MP IRQ sources: %d.\n", mp_irq_entries);
- for (i = 0; i < nr_ioapics; i++)
- printk(KERN_DEBUG "number of IO-APIC #%d registers: %d.\n",
- mp_ioapics[i].mp_apicid, nr_ioapic_registers[i]);
-
- /*
- * We are a bit conservative about what we expect. We have to
- * know about every hardware change ASAP.
- */
- printk(KERN_INFO "testing the IO APIC.......................\n");
-
- for (apic = 0; apic < nr_ioapics; apic++) {
-
- spin_lock_irqsave(&ioapic_lock, flags);
- reg_00.raw = io_apic_read(apic, 0);
- reg_01.raw = io_apic_read(apic, 1);
- if (reg_01.bits.version >= 0x10)
- reg_02.raw = io_apic_read(apic, 2);
- if (reg_01.bits.version >= 0x20)
- reg_03.raw = io_apic_read(apic, 3);
- spin_unlock_irqrestore(&ioapic_lock, flags);
-
- printk(KERN_DEBUG "IO APIC #%d......\n", mp_ioapics[apic].mp_apicid);
- printk(KERN_DEBUG ".... register #00: %08X\n", reg_00.raw);
- printk(KERN_DEBUG "....... : physical APIC id: %02X\n", reg_00.bits.ID);
- printk(KERN_DEBUG "....... : Delivery Type: %X\n", reg_00.bits.delivery_type);
- printk(KERN_DEBUG "....... : LTS : %X\n", reg_00.bits.LTS);
-
- printk(KERN_DEBUG ".... register #01: %08X\n", reg_01.raw);
- printk(KERN_DEBUG "....... : max redirection entries: %04X\n", reg_01.bits.entries);
-
- printk(KERN_DEBUG "....... : PRQ implemented: %X\n", reg_01.bits.PRQ);
- printk(KERN_DEBUG "....... : IO APIC version: %04X\n", reg_01.bits.version);
-
- /*
- * Some Intel chipsets with IO APIC VERSION of 0x1? don't have reg_02,
- * but the value of reg_02 is read as the previous read register
- * value, so ignore it if reg_02 == reg_01.
- */
- if (reg_01.bits.version >= 0x10 && reg_02.raw != reg_01.raw) {
- printk(KERN_DEBUG ".... register #02: %08X\n", reg_02.raw);
- printk(KERN_DEBUG "....... : arbitration: %02X\n", reg_02.bits.arbitration);
- }
-
- /*
- * Some Intel chipsets with IO APIC VERSION of 0x2? don't have reg_02
- * or reg_03, but the value of reg_0[23] is read as the previous read
- * register value, so ignore it if reg_03 == reg_0[12].
- */
- if (reg_01.bits.version >= 0x20 && reg_03.raw != reg_02.raw &&
- reg_03.raw != reg_01.raw) {
- printk(KERN_DEBUG ".... register #03: %08X\n", reg_03.raw);
- printk(KERN_DEBUG "....... : Boot DT : %X\n", reg_03.bits.boot_DT);
- }
-
- printk(KERN_DEBUG ".... IRQ redirection table:\n");
-
- printk(KERN_DEBUG " NR Log Phy Mask Trig IRR Pol"
- " Stat Dest Deli Vect: \n");
-
- for (i = 0; i <= reg_01.bits.entries; i++) {
- struct IO_APIC_route_entry entry;
-
- entry = ioapic_read_entry(apic, i);
-
- printk(KERN_DEBUG " %02x %03X %02X ",
- i,
- entry.dest.logical.logical_dest,
- entry.dest.physical.physical_dest
- );
-
- printk("%1d %1d %1d %1d %1d %1d %1d %02X\n",
- entry.mask,
- entry.trigger,
- entry.irr,
- entry.polarity,
- entry.delivery_status,
- entry.dest_mode,
- entry.delivery_mode,
- entry.vector
- );
- }
- }
- printk(KERN_DEBUG "IRQ to pin mappings:\n");
- for (i = 0; i < NR_IRQS; i++) {
- struct irq_pin_list *entry = irq_2_pin + i;
- if (entry->pin < 0)
- continue;
- printk(KERN_DEBUG "IRQ%d ", i);
- for (;;) {
- printk("-> %d:%d", entry->apic, entry->pin);
- if (!entry->next)
- break;
- entry = irq_2_pin + entry->next;
- }
- printk("\n");
- }
-
- printk(KERN_INFO ".................................... done.\n");
-
- return;
-}
-
-__apicdebuginit(void) print_APIC_bitfield(int base)
-{
- unsigned int v;
- int i, j;
-
- if (apic_verbosity == APIC_QUIET)
- return;
-
- printk(KERN_DEBUG "0123456789abcdef0123456789abcdef\n" KERN_DEBUG);
- for (i = 0; i < 8; i++) {
- v = apic_read(base + i*0x10);
- for (j = 0; j < 32; j++) {
- if (v & (1<<j))
- printk("1");
- else
- printk("0");
- }
- printk("\n");
- }
-}
-
-__apicdebuginit(void) print_local_APIC(void *dummy)
-{
- unsigned int v, ver, maxlvt;
- u64 icr;
-
- if (apic_verbosity == APIC_QUIET)
- return;
-
- printk("\n" KERN_DEBUG "printing local APIC contents on CPU#%d/%d:\n",
- smp_processor_id(), hard_smp_processor_id());
- v = apic_read(APIC_ID);
- printk(KERN_INFO "... APIC ID: %08x (%01x)\n", v,
- GET_APIC_ID(v));
- v = apic_read(APIC_LVR);
- printk(KERN_INFO "... APIC VERSION: %08x\n", v);
- ver = GET_APIC_VERSION(v);
- maxlvt = lapic_get_maxlvt();
-
- v = apic_read(APIC_TASKPRI);
- printk(KERN_DEBUG "... APIC TASKPRI: %08x (%02x)\n", v, v & APIC_TPRI_MASK);
-
- if (APIC_INTEGRATED(ver)) { /* !82489DX */
- v = apic_read(APIC_ARBPRI);
- printk(KERN_DEBUG "... APIC ARBPRI: %08x (%02x)\n", v,
- v & APIC_ARBPRI_MASK);
- v = apic_read(APIC_PROCPRI);
- printk(KERN_DEBUG "... APIC PROCPRI: %08x\n", v);
- }
-
- v = apic_read(APIC_EOI);
- printk(KERN_DEBUG "... APIC EOI: %08x\n", v);
- v = apic_read(APIC_RRR);
- printk(KERN_DEBUG "... APIC RRR: %08x\n", v);
- v = apic_read(APIC_LDR);
- printk(KERN_DEBUG "... APIC LDR: %08x\n", v);
- v = apic_read(APIC_DFR);
- printk(KERN_DEBUG "... APIC DFR: %08x\n", v);
- v = apic_read(APIC_SPIV);
- printk(KERN_DEBUG "... APIC SPIV: %08x\n", v);
-
- printk(KERN_DEBUG "... APIC ISR field:\n");
- print_APIC_bitfield(APIC_ISR);
- printk(KERN_DEBUG "... APIC TMR field:\n");
- print_APIC_bitfield(APIC_TMR);
- printk(KERN_DEBUG "... APIC IRR field:\n");
- print_APIC_bitfield(APIC_IRR);
-
- if (APIC_INTEGRATED(ver)) { /* !82489DX */
- if (maxlvt > 3) /* Due to the Pentium erratum 3AP. */
- apic_write(APIC_ESR, 0);
- v = apic_read(APIC_ESR);
- printk(KERN_DEBUG "... APIC ESR: %08x\n", v);
- }
-
- icr = apic_icr_read();
- printk(KERN_DEBUG "... APIC ICR: %08x\n", icr);
- printk(KERN_DEBUG "... APIC ICR2: %08x\n", icr >> 32);
-
- v = apic_read(APIC_LVTT);
- printk(KERN_DEBUG "... APIC LVTT: %08x\n", v);
-
- if (maxlvt > 3) { /* PC is LVT#4. */
- v = apic_read(APIC_LVTPC);
- printk(KERN_DEBUG "... APIC LVTPC: %08x\n", v);
- }
- v = apic_read(APIC_LVT0);
- printk(KERN_DEBUG "... APIC LVT0: %08x\n", v);
- v = apic_read(APIC_LVT1);
- printk(KERN_DEBUG "... APIC LVT1: %08x\n", v);
-
- if (maxlvt > 2) { /* ERR is LVT#3. */
- v = apic_read(APIC_LVTERR);
- printk(KERN_DEBUG "... APIC LVTERR: %08x\n", v);
- }
-
- v = apic_read(APIC_TMICT);
- printk(KERN_DEBUG "... APIC TMICT: %08x\n", v);
- v = apic_read(APIC_TMCCT);
- printk(KERN_DEBUG "... APIC TMCCT: %08x\n", v);
- v = apic_read(APIC_TDCR);
- printk(KERN_DEBUG "... APIC TDCR: %08x\n", v);
- printk("\n");
-}
-
-__apicdebuginit(void) print_all_local_APICs(void)
-{
- on_each_cpu(print_local_APIC, NULL, 1);
-}
-
-__apicdebuginit(void) print_PIC(void)
-{
- unsigned int v;
- unsigned long flags;
-
- if (apic_verbosity == APIC_QUIET)
- return;
-
- printk(KERN_DEBUG "\nprinting PIC contents\n");
-
- spin_lock_irqsave(&i8259A_lock, flags);
-
- v = inb(0xa1) << 8 | inb(0x21);
- printk(KERN_DEBUG "... PIC IMR: %04x\n", v);
-
- v = inb(0xa0) << 8 | inb(0x20);
- printk(KERN_DEBUG "... PIC IRR: %04x\n", v);
-
- outb(0x0b, 0xa0);
- outb(0x0b, 0x20);
- v = inb(0xa0) << 8 | inb(0x20);
- outb(0x0a, 0xa0);
- outb(0x0a, 0x20);
-
- spin_unlock_irqrestore(&i8259A_lock, flags);
-
- printk(KERN_DEBUG "... PIC ISR: %04x\n", v);
-
- v = inb(0x4d1) << 8 | inb(0x4d0);
- printk(KERN_DEBUG "... PIC ELCR: %04x\n", v);
-}
-
-__apicdebuginit(int) print_all_ICs(void)
-{
- print_PIC();
- print_all_local_APICs();
- print_IO_APIC();
-
- return 0;
-}
-
-fs_initcall(print_all_ICs);
-
-
-static void __init enable_IO_APIC(void)
-{
- union IO_APIC_reg_01 reg_01;
- int i8259_apic, i8259_pin;
- int i, apic;
- unsigned long flags;
-
- for (i = 0; i < PIN_MAP_SIZE; i++) {
- irq_2_pin[i].pin = -1;
- irq_2_pin[i].next = 0;
- }
- if (!pirqs_enabled)
- for (i = 0; i < MAX_PIRQS; i++)
- pirq_entries[i] = -1;
-
- /*
- * The number of IO-APIC IRQ registers (== #pins):
- */
- for (apic = 0; apic < nr_ioapics; apic++) {
- spin_lock_irqsave(&ioapic_lock, flags);
- reg_01.raw = io_apic_read(apic, 1);
- spin_unlock_irqrestore(&ioapic_lock, flags);
- nr_ioapic_registers[apic] = reg_01.bits.entries+1;
- }
- for (apic = 0; apic < nr_ioapics; apic++) {
- int pin;
- /* See if any of the pins is in ExtINT mode */
- for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) {
- struct IO_APIC_route_entry entry;
- entry = ioapic_read_entry(apic, pin);
-
-
- /* If the interrupt line is enabled and in ExtInt mode
- * I have found the pin where the i8259 is connected.
- */
- if ((entry.mask == 0) && (entry.delivery_mode == dest_ExtINT)) {
- ioapic_i8259.apic = apic;
- ioapic_i8259.pin = pin;
- goto found_i8259;
- }
- }
- }
- found_i8259:
- /* Look to see what if the MP table has reported the ExtINT */
- /* If we could not find the appropriate pin by looking at the ioapic
- * the i8259 probably is not connected the ioapic but give the
- * mptable a chance anyway.
- */
- i8259_pin = find_isa_irq_pin(0, mp_ExtINT);
- i8259_apic = find_isa_irq_apic(0, mp_ExtINT);
- /* Trust the MP table if nothing is setup in the hardware */
- if ((ioapic_i8259.pin == -1) && (i8259_pin >= 0)) {
- printk(KERN_WARNING "ExtINT not setup in hardware but reported by MP table\n");
- ioapic_i8259.pin = i8259_pin;
- ioapic_i8259.apic = i8259_apic;
- }
- /* Complain if the MP table and the hardware disagree */
- if (((ioapic_i8259.apic != i8259_apic) || (ioapic_i8259.pin != i8259_pin)) &&
- (i8259_pin >= 0) && (ioapic_i8259.pin >= 0))
- {
- printk(KERN_WARNING "ExtINT in hardware and MP table differ\n");
- }
-
- /*
- * Do not trust the IO-APIC being empty at bootup
- */
- clear_IO_APIC();
-}
-
-/*
- * Not an __init, needed by the reboot code
- */
-void disable_IO_APIC(void)
-{
- /*
- * Clear the IO-APIC before rebooting:
- */
- clear_IO_APIC();
-
- /*
- * If the i8259 is routed through an IOAPIC
- * Put that IOAPIC in virtual wire mode
- * so legacy interrupts can be delivered.
- */
- if (ioapic_i8259.pin != -1) {
- struct IO_APIC_route_entry entry;
-
- memset(&entry, 0, sizeof(entry));
- entry.mask = 0; /* Enabled */
- entry.trigger = 0; /* Edge */
- entry.irr = 0;
- entry.polarity = 0; /* High */
- entry.delivery_status = 0;
- entry.dest_mode = 0; /* Physical */
- entry.delivery_mode = dest_ExtINT; /* ExtInt */
- entry.vector = 0;
- entry.dest.physical.physical_dest = read_apic_id();
-
- /*
- * Add it to the IO-APIC irq-routing table:
- */
- ioapic_write_entry(ioapic_i8259.apic, ioapic_i8259.pin, entry);
- }
- disconnect_bsp_APIC(ioapic_i8259.pin != -1);
-}
-
-/*
- * function to set the IO-APIC physical IDs based on the
- * values stored in the MPC table.
- *
- * by Matt Domsch <Matt_Domsch@dell.com> Tue Dec 21 12:25:05 CST 1999
- */
-
-static void __init setup_ioapic_ids_from_mpc(void)
-{
- union IO_APIC_reg_00 reg_00;
- physid_mask_t phys_id_present_map;
- int apic;
- int i;
- unsigned char old_id;
- unsigned long flags;
-
- if (x86_quirks->setup_ioapic_ids && x86_quirks->setup_ioapic_ids())
- return;
-
- /*
- * Don't check I/O APIC IDs for xAPIC systems. They have
- * no meaning without the serial APIC bus.
- */
- if (!(boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)
- || APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
- return;
- /*
- * This is broken; anything with a real cpu count has to
- * circumvent this idiocy regardless.
- */
- phys_id_present_map = ioapic_phys_id_map(phys_cpu_present_map);
-
- /*
- * Set the IOAPIC ID to the value stored in the MPC table.
- */
- for (apic = 0; apic < nr_ioapics; apic++) {
-
- /* Read the register 0 value */
- spin_lock_irqsave(&ioapic_lock, flags);
- reg_00.raw = io_apic_read(apic, 0);
- spin_unlock_irqrestore(&ioapic_lock, flags);
-
- old_id = mp_ioapics[apic].mp_apicid;
-
- if (mp_ioapics[apic].mp_apicid >= get_physical_broadcast()) {
- printk(KERN_ERR "BIOS bug, IO-APIC#%d ID is %d in the MPC table!...\n",
- apic, mp_ioapics[apic].mp_apicid);
- printk(KERN_ERR "... fixing up to %d. (tell your hw vendor)\n",
- reg_00.bits.ID);
- mp_ioapics[apic].mp_apicid = reg_00.bits.ID;
- }
-
- /*
- * Sanity check, is the ID really free? Every APIC in a
- * system must have a unique ID or we get lots of nice
- * 'stuck on smp_invalidate_needed IPI wait' messages.
- */
- if (check_apicid_used(phys_id_present_map,
- mp_ioapics[apic].mp_apicid)) {
- printk(KERN_ERR "BIOS bug, IO-APIC#%d ID %d is already used!...\n",
- apic, mp_ioapics[apic].mp_apicid);
- for (i = 0; i < get_physical_broadcast(); i++)
- if (!physid_isset(i, phys_id_present_map))
- break;
- if (i >= get_physical_broadcast())
- panic("Max APIC ID exceeded!\n");
- printk(KERN_ERR "... fixing up to %d. (tell your hw vendor)\n",
- i);
- physid_set(i, phys_id_present_map);
- mp_ioapics[apic].mp_apicid = i;
- } else {
- physid_mask_t tmp;
- tmp = apicid_to_cpu_present(mp_ioapics[apic].mp_apicid);
- apic_printk(APIC_VERBOSE, "Setting %d in the "
- "phys_id_present_map\n",
- mp_ioapics[apic].mp_apicid);
- physids_or(phys_id_present_map, phys_id_present_map, tmp);
- }
-
-
- /*
- * We need to adjust the IRQ routing table
- * if the ID changed.
- */
- if (old_id != mp_ioapics[apic].mp_apicid)
- for (i = 0; i < mp_irq_entries; i++)
- if (mp_irqs[i].mp_dstapic == old_id)
- mp_irqs[i].mp_dstapic
- = mp_ioapics[apic].mp_apicid;
-
- /*
- * Read the right value from the MPC table and
- * write it into the ID register.
- */
- apic_printk(APIC_VERBOSE, KERN_INFO
- "...changing IO-APIC physical APIC ID to %d ...",
- mp_ioapics[apic].mp_apicid);
-
- reg_00.bits.ID = mp_ioapics[apic].mp_apicid;
- spin_lock_irqsave(&ioapic_lock, flags);
- io_apic_write(apic, 0, reg_00.raw);
- spin_unlock_irqrestore(&ioapic_lock, flags);
-
- /*
- * Sanity check
- */
- spin_lock_irqsave(&ioapic_lock, flags);
- reg_00.raw = io_apic_read(apic, 0);
- spin_unlock_irqrestore(&ioapic_lock, flags);
- if (reg_00.bits.ID != mp_ioapics[apic].mp_apicid)
- printk("could not set ID!\n");
- else
- apic_printk(APIC_VERBOSE, " ok.\n");
- }
-}
-
-int no_timer_check __initdata;
-
-static int __init notimercheck(char *s)
-{
- no_timer_check = 1;
- return 1;
-}
-__setup("no_timer_check", notimercheck);
-
-/*
- * There is a nasty bug in some older SMP boards, their mptable lies
- * about the timer IRQ. We do the following to work around the situation:
- *
- * - timer IRQ defaults to IO-APIC IRQ
- * - if this function detects that timer IRQs are defunct, then we fall
- * back to ISA timer IRQs
- */
-static int __init timer_irq_works(void)
-{
- unsigned long t1 = jiffies;
- unsigned long flags;
-
- if (no_timer_check)
- return 1;
-
- local_save_flags(flags);
- local_irq_enable();
- /* Let ten ticks pass... */
- mdelay((10 * 1000) / HZ);
- local_irq_restore(flags);
-
- /*
- * Expect a few ticks at least, to be sure some possible
- * glue logic does not lock up after one or two first
- * ticks in a non-ExtINT mode. Also the local APIC
- * might have cached one ExtINT interrupt. Finally, at
- * least one tick may be lost due to delays.
- */
- if (time_after(jiffies, t1 + 4))
- return 1;
-
- return 0;
-}
-
-/*
- * In the SMP+IOAPIC case it might happen that there are an unspecified
- * number of pending IRQ events unhandled. These cases are very rare,
- * so we 'resend' these IRQs via IPIs, to the same CPU. It's much
- * better to do it this way as thus we do not have to be aware of
- * 'pending' interrupts in the IRQ path, except at this point.
- */
-/*
- * Edge triggered needs to resend any interrupt
- * that was delayed but this is now handled in the device
- * independent code.
- */
-
-/*
- * Startup quirk:
- *
- * Starting up a edge-triggered IO-APIC interrupt is
- * nasty - we need to make sure that we get the edge.
- * If it is already asserted for some reason, we need
- * return 1 to indicate that is was pending.
- *
- * This is not complete - we should be able to fake
- * an edge even if it isn't on the 8259A...
- *
- * (We do this for level-triggered IRQs too - it cannot hurt.)
- */
-static unsigned int startup_ioapic_irq(unsigned int irq)
-{
- int was_pending = 0;
- unsigned long flags;
-
- spin_lock_irqsave(&ioapic_lock, flags);
- if (irq < 16) {
- disable_8259A_irq(irq);
- if (i8259A_irq_pending(irq))
- was_pending = 1;
- }
- __unmask_IO_APIC_irq(irq);
- spin_unlock_irqrestore(&ioapic_lock, flags);
-
- return was_pending;
-}
-
-static void ack_ioapic_irq(unsigned int irq)
-{
- move_native_irq(irq);
- ack_APIC_irq();
-}
-
-static void ack_ioapic_quirk_irq(unsigned int irq)
-{
- unsigned long v;
- int i;
-
- move_native_irq(irq);
-/*
- * It appears there is an erratum which affects at least version 0x11
- * of I/O APIC (that's the 82093AA and cores integrated into various
- * chipsets). Under certain conditions a level-triggered interrupt is
- * erroneously delivered as edge-triggered one but the respective IRR
- * bit gets set nevertheless. As a result the I/O unit expects an EOI
- * message but it will never arrive and further interrupts are blocked
- * from the source. The exact reason is so far unknown, but the
- * phenomenon was observed when two consecutive interrupt requests
- * from a given source get delivered to the same CPU and the source is
- * temporarily disabled in between.
- *
- * A workaround is to simulate an EOI message manually. We achieve it
- * by setting the trigger mode to edge and then to level when the edge
- * trigger mode gets detected in the TMR of a local APIC for a
- * level-triggered interrupt. We mask the source for the time of the
- * operation to prevent an edge-triggered interrupt escaping meanwhile.
- * The idea is from Manfred Spraul. --macro
- */
- i = irq_vector[irq];
-
- v = apic_read(APIC_TMR + ((i & ~0x1f) >> 1));
-
- ack_APIC_irq();
-
- if (!(v & (1 << (i & 0x1f)))) {
- atomic_inc(&irq_mis_count);
- spin_lock(&ioapic_lock);
- __mask_and_edge_IO_APIC_irq(irq);
- __unmask_and_level_IO_APIC_irq(irq);
- spin_unlock(&ioapic_lock);
- }
-}
-
-static int ioapic_retrigger_irq(unsigned int irq)
-{
- send_IPI_self(irq_vector[irq]);
-
- return 1;
-}
-
-static struct irq_chip ioapic_chip __read_mostly = {
- .name = "IO-APIC",
- .startup = startup_ioapic_irq,
- .mask = mask_IO_APIC_irq,
- .unmask = unmask_IO_APIC_irq,
- .ack = ack_ioapic_irq,
- .eoi = ack_ioapic_quirk_irq,
-#ifdef CONFIG_SMP
- .set_affinity = set_ioapic_affinity_irq,
-#endif
- .retrigger = ioapic_retrigger_irq,
-};
-
-
-static inline void init_IO_APIC_traps(void)
-{
- int irq;
-
- /*
- * NOTE! The local APIC isn't very good at handling
- * multiple interrupts at the same interrupt level.
- * As the interrupt level is determined by taking the
- * vector number and shifting that right by 4, we
- * want to spread these out a bit so that they don't
- * all fall in the same interrupt level.
- *
- * Also, we've got to be careful not to trash gate
- * 0x80, because int 0x80 is hm, kind of importantish. ;)
- */
- for (irq = 0; irq < NR_IRQS ; irq++) {
- if (IO_APIC_IRQ(irq) && !irq_vector[irq]) {
- /*
- * Hmm.. We don't have an entry for this,
- * so default to an old-fashioned 8259
- * interrupt if we can..
- */
- if (irq < 16)
- make_8259A_irq(irq);
- else
- /* Strange. Oh, well.. */
- irq_desc[irq].chip = &no_irq_chip;
- }
- }
-}
-
-/*
- * The local APIC irq-chip implementation:
- */
-
-static void ack_lapic_irq(unsigned int irq)
-{
- ack_APIC_irq();
-}
-
-static void mask_lapic_irq(unsigned int irq)
-{
- unsigned long v;
-
- v = apic_read(APIC_LVT0);
- apic_write(APIC_LVT0, v | APIC_LVT_MASKED);
-}
-
-static void unmask_lapic_irq(unsigned int irq)
-{
- unsigned long v;
-
- v = apic_read(APIC_LVT0);
- apic_write(APIC_LVT0, v & ~APIC_LVT_MASKED);
-}
-
-static struct irq_chip lapic_chip __read_mostly = {
- .name = "local-APIC",
- .mask = mask_lapic_irq,
- .unmask = unmask_lapic_irq,
- .ack = ack_lapic_irq,
-};
-
-static void lapic_register_intr(int irq, int vector)
-{
- irq_desc[irq].status &= ~IRQ_LEVEL;
- set_irq_chip_and_handler_name(irq, &lapic_chip, handle_edge_irq,
- "edge");
- set_intr_gate(vector, interrupt[irq]);
-}
-
-static void __init setup_nmi(void)
-{
- /*
- * Dirty trick to enable the NMI watchdog ...
- * We put the 8259A master into AEOI mode and
- * unmask on all local APICs LVT0 as NMI.
- *
- * The idea to use the 8259A in AEOI mode ('8259A Virtual Wire')
- * is from Maciej W. Rozycki - so we do not have to EOI from
- * the NMI handler or the timer interrupt.
- */
- apic_printk(APIC_VERBOSE, KERN_INFO "activating NMI Watchdog ...");
-
- enable_NMI_through_LVT0();
-
- apic_printk(APIC_VERBOSE, " done.\n");
-}
-
-/*
- * This looks a bit hackish but it's about the only one way of sending
- * a few INTA cycles to 8259As and any associated glue logic. ICR does
- * not support the ExtINT mode, unfortunately. We need to send these
- * cycles as some i82489DX-based boards have glue logic that keeps the
- * 8259A interrupt line asserted until INTA. --macro
- */
-static inline void __init unlock_ExtINT_logic(void)
-{
- int apic, pin, i;
- struct IO_APIC_route_entry entry0, entry1;
- unsigned char save_control, save_freq_select;
-
- pin = find_isa_irq_pin(8, mp_INT);
- if (pin == -1) {
- WARN_ON_ONCE(1);
- return;
- }
- apic = find_isa_irq_apic(8, mp_INT);
- if (apic == -1) {
- WARN_ON_ONCE(1);
- return;
- }
-
- entry0 = ioapic_read_entry(apic, pin);
- clear_IO_APIC_pin(apic, pin);
-
- memset(&entry1, 0, sizeof(entry1));
-
- entry1.dest_mode = 0; /* physical delivery */
- entry1.mask = 0; /* unmask IRQ now */
- entry1.dest.physical.physical_dest = hard_smp_processor_id();
- entry1.delivery_mode = dest_ExtINT;
- entry1.polarity = entry0.polarity;
- entry1.trigger = 0;
- entry1.vector = 0;
-
- ioapic_write_entry(apic, pin, entry1);
-
- save_control = CMOS_READ(RTC_CONTROL);
- save_freq_select = CMOS_READ(RTC_FREQ_SELECT);
- CMOS_WRITE((save_freq_select & ~RTC_RATE_SELECT) | 0x6,
- RTC_FREQ_SELECT);
- CMOS_WRITE(save_control | RTC_PIE, RTC_CONTROL);
-
- i = 100;
- while (i-- > 0) {
- mdelay(10);
- if ((CMOS_READ(RTC_INTR_FLAGS) & RTC_PF) == RTC_PF)
- i -= 10;
- }
-
- CMOS_WRITE(save_control, RTC_CONTROL);
- CMOS_WRITE(save_freq_select, RTC_FREQ_SELECT);
- clear_IO_APIC_pin(apic, pin);
-
- ioapic_write_entry(apic, pin, entry0);
-}
-
-/*
- * This code may look a bit paranoid, but it's supposed to cooperate with
- * a wide range of boards and BIOS bugs. Fortunately only the timer IRQ
- * is so screwy. Thanks to Brian Perkins for testing/hacking this beast
- * fanatically on his truly buggy board.
- */
-static inline void __init check_timer(void)
-{
- int apic1, pin1, apic2, pin2;
- int no_pin1 = 0;
- int vector;
- unsigned int ver;
- unsigned long flags;
-
- local_irq_save(flags);
-
- ver = apic_read(APIC_LVR);
- ver = GET_APIC_VERSION(ver);
-
- /*
- * get/set the timer IRQ vector:
- */
- disable_8259A_irq(0);
- vector = assign_irq_vector(0);
- set_intr_gate(vector, interrupt[0]);
-
- /*
- * As IRQ0 is to be enabled in the 8259A, the virtual
- * wire has to be disabled in the local APIC. Also
- * timer interrupts need to be acknowledged manually in
- * the 8259A for the i82489DX when using the NMI
- * watchdog as that APIC treats NMIs as level-triggered.
- * The AEOI mode will finish them in the 8259A
- * automatically.
- */
- apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_EXTINT);
- init_8259A(1);
- timer_ack = (nmi_watchdog == NMI_IO_APIC && !APIC_INTEGRATED(ver));
-
- pin1 = find_isa_irq_pin(0, mp_INT);
- apic1 = find_isa_irq_apic(0, mp_INT);
- pin2 = ioapic_i8259.pin;
- apic2 = ioapic_i8259.apic;
-
- apic_printk(APIC_QUIET, KERN_INFO "..TIMER: vector=0x%02X "
- "apic1=%d pin1=%d apic2=%d pin2=%d\n",
- vector, apic1, pin1, apic2, pin2);
-
- /*
- * Some BIOS writers are clueless and report the ExtINTA
- * I/O APIC input from the cascaded 8259A as the timer
- * interrupt input. So just in case, if only one pin
- * was found above, try it both directly and through the
- * 8259A.
- */
- if (pin1 == -1) {
- pin1 = pin2;
- apic1 = apic2;
- no_pin1 = 1;
- } else if (pin2 == -1) {
- pin2 = pin1;
- apic2 = apic1;
- }
-
- if (pin1 != -1) {
- /*
- * Ok, does IRQ0 through the IOAPIC work?
- */
- if (no_pin1) {
- add_pin_to_irq(0, apic1, pin1);
- setup_timer_IRQ0_pin(apic1, pin1, vector);
- }
- unmask_IO_APIC_irq(0);
- if (timer_irq_works()) {
- if (nmi_watchdog == NMI_IO_APIC) {
- setup_nmi();
- enable_8259A_irq(0);
- }
- if (disable_timer_pin_1 > 0)
- clear_IO_APIC_pin(0, pin1);
- goto out;
- }
- clear_IO_APIC_pin(apic1, pin1);
- if (!no_pin1)
- apic_printk(APIC_QUIET, KERN_ERR "..MP-BIOS bug: "
- "8254 timer not connected to IO-APIC\n");
-
- apic_printk(APIC_QUIET, KERN_INFO "...trying to set up timer "
- "(IRQ0) through the 8259A ...\n");
- apic_printk(APIC_QUIET, KERN_INFO
- "..... (found apic %d pin %d) ...\n", apic2, pin2);
- /*
- * legacy devices should be connected to IO APIC #0
- */
- replace_pin_at_irq(0, apic1, pin1, apic2, pin2);
- setup_timer_IRQ0_pin(apic2, pin2, vector);
- unmask_IO_APIC_irq(0);
- enable_8259A_irq(0);
- if (timer_irq_works()) {
- apic_printk(APIC_QUIET, KERN_INFO "....... works.\n");
- timer_through_8259 = 1;
- if (nmi_watchdog == NMI_IO_APIC) {
- disable_8259A_irq(0);
- setup_nmi();
- enable_8259A_irq(0);
- }
- goto out;
- }
- /*
- * Cleanup, just in case ...
- */
- disable_8259A_irq(0);
- clear_IO_APIC_pin(apic2, pin2);
- apic_printk(APIC_QUIET, KERN_INFO "....... failed.\n");
- }
-
- if (nmi_watchdog == NMI_IO_APIC) {
- apic_printk(APIC_QUIET, KERN_WARNING "timer doesn't work "
- "through the IO-APIC - disabling NMI Watchdog!\n");
- nmi_watchdog = NMI_NONE;
- }
- timer_ack = 0;
-
- apic_printk(APIC_QUIET, KERN_INFO
- "...trying to set up timer as Virtual Wire IRQ...\n");
-
- lapic_register_intr(0, vector);
- apic_write(APIC_LVT0, APIC_DM_FIXED | vector); /* Fixed mode */
- enable_8259A_irq(0);
-
- if (timer_irq_works()) {
- apic_printk(APIC_QUIET, KERN_INFO "..... works.\n");
- goto out;
- }
- disable_8259A_irq(0);
- apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_FIXED | vector);
- apic_printk(APIC_QUIET, KERN_INFO "..... failed.\n");
-
- apic_printk(APIC_QUIET, KERN_INFO
- "...trying to set up timer as ExtINT IRQ...\n");
-
- init_8259A(0);
- make_8259A_irq(0);
- apic_write(APIC_LVT0, APIC_DM_EXTINT);
-
- unlock_ExtINT_logic();
-
- if (timer_irq_works()) {
- apic_printk(APIC_QUIET, KERN_INFO "..... works.\n");
- goto out;
- }
- apic_printk(APIC_QUIET, KERN_INFO "..... failed :(.\n");
- panic("IO-APIC + timer doesn't work! Boot with apic=debug and send a "
- "report. Then try booting with the 'noapic' option.\n");
-out:
- local_irq_restore(flags);
-}
-
-/*
- * Traditionally ISA IRQ2 is the cascade IRQ, and is not available
- * to devices. However there may be an I/O APIC pin available for
- * this interrupt regardless. The pin may be left unconnected, but
- * typically it will be reused as an ExtINT cascade interrupt for
- * the master 8259A. In the MPS case such a pin will normally be
- * reported as an ExtINT interrupt in the MP table. With ACPI
- * there is no provision for ExtINT interrupts, and in the absence
- * of an override it would be treated as an ordinary ISA I/O APIC
- * interrupt, that is edge-triggered and unmasked by default. We
- * used to do this, but it caused problems on some systems because
- * of the NMI watchdog and sometimes IRQ0 of the 8254 timer using
- * the same ExtINT cascade interrupt to drive the local APIC of the
- * bootstrap processor. Therefore we refrain from routing IRQ2 to
- * the I/O APIC in all cases now. No actual device should request
- * it anyway. --macro
- */
-#define PIC_IRQS (1 << PIC_CASCADE_IR)
-
-void __init setup_IO_APIC(void)
-{
- int i;
-
- /* Reserve all the system vectors. */
- for (i = first_system_vector; i < NR_VECTORS; i++)
- set_bit(i, used_vectors);
-
- enable_IO_APIC();
-
- io_apic_irqs = ~PIC_IRQS;
-
- printk("ENABLING IO-APIC IRQs\n");
-
- /*
- * Set up IO-APIC IRQ routing.
- */
- if (!acpi_ioapic)
- setup_ioapic_ids_from_mpc();
- sync_Arb_IDs();
- setup_IO_APIC_irqs();
- init_IO_APIC_traps();
- check_timer();
-}
-
-/*
- * Called after all the initialization is done. If we didnt find any
- * APIC bugs then we can allow the modify fast path
- */
-
-static int __init io_apic_bug_finalize(void)
-{
- if (sis_apic_bug == -1)
- sis_apic_bug = 0;
- return 0;
-}
-
-late_initcall(io_apic_bug_finalize);
-
-struct sysfs_ioapic_data {
- struct sys_device dev;
- struct IO_APIC_route_entry entry[0];
-};
-static struct sysfs_ioapic_data *mp_ioapic_data[MAX_IO_APICS];
-
-static int ioapic_suspend(struct sys_device *dev, pm_message_t state)
-{
- struct IO_APIC_route_entry *entry;
- struct sysfs_ioapic_data *data;
- int i;
-
- data = container_of(dev, struct sysfs_ioapic_data, dev);
- entry = data->entry;
- for (i = 0; i < nr_ioapic_registers[dev->id]; i++)
- entry[i] = ioapic_read_entry(dev->id, i);
-
- return 0;
-}
-
-static int ioapic_resume(struct sys_device *dev)
-{
- struct IO_APIC_route_entry *entry;
- struct sysfs_ioapic_data *data;
- unsigned long flags;
- union IO_APIC_reg_00 reg_00;
- int i;
-
- data = container_of(dev, struct sysfs_ioapic_data, dev);
- entry = data->entry;
-
- spin_lock_irqsave(&ioapic_lock, flags);
- reg_00.raw = io_apic_read(dev->id, 0);
- if (reg_00.bits.ID != mp_ioapics[dev->id].mp_apicid) {
- reg_00.bits.ID = mp_ioapics[dev->id].mp_apicid;
- io_apic_write(dev->id, 0, reg_00.raw);
- }
- spin_unlock_irqrestore(&ioapic_lock, flags);
- for (i = 0; i < nr_ioapic_registers[dev->id]; i++)
- ioapic_write_entry(dev->id, i, entry[i]);
-
- return 0;
-}
-
-static struct sysdev_class ioapic_sysdev_class = {
- .name = "ioapic",
- .suspend = ioapic_suspend,
- .resume = ioapic_resume,
-};
-
-static int __init ioapic_init_sysfs(void)
-{
- struct sys_device *dev;
- int i, size, error = 0;
-
- error = sysdev_class_register(&ioapic_sysdev_class);
- if (error)
- return error;
-
- for (i = 0; i < nr_ioapics; i++) {
- size = sizeof(struct sys_device) + nr_ioapic_registers[i]
- * sizeof(struct IO_APIC_route_entry);
- mp_ioapic_data[i] = kzalloc(size, GFP_KERNEL);
- if (!mp_ioapic_data[i]) {
- printk(KERN_ERR "Can't suspend/resume IOAPIC %d\n", i);
- continue;
- }
- dev = &mp_ioapic_data[i]->dev;
- dev->id = i;
- dev->cls = &ioapic_sysdev_class;
- error = sysdev_register(dev);
- if (error) {
- kfree(mp_ioapic_data[i]);
- mp_ioapic_data[i] = NULL;
- printk(KERN_ERR "Can't suspend/resume IOAPIC %d\n", i);
- continue;
- }
- }
-
- return 0;
-}
-
-device_initcall(ioapic_init_sysfs);
-
-/*
- * Dynamic irq allocate and deallocation
- */
-int create_irq(void)
-{
- /* Allocate an unused irq */
- int irq, new, vector = 0;
- unsigned long flags;
-
- irq = -ENOSPC;
- spin_lock_irqsave(&vector_lock, flags);
- for (new = (NR_IRQS - 1); new >= 0; new--) {
- if (platform_legacy_irq(new))
- continue;
- if (irq_vector[new] != 0)
- continue;
- vector = __assign_irq_vector(new);
- if (likely(vector > 0))
- irq = new;
- break;
- }
- spin_unlock_irqrestore(&vector_lock, flags);
-
- if (irq >= 0) {
- set_intr_gate(vector, interrupt[irq]);
- dynamic_irq_init(irq);
- }
- return irq;
-}
-
-void destroy_irq(unsigned int irq)
-{
- unsigned long flags;
-
- dynamic_irq_cleanup(irq);
-
- spin_lock_irqsave(&vector_lock, flags);
- clear_bit(irq_vector[irq], used_vectors);
- irq_vector[irq] = 0;
- spin_unlock_irqrestore(&vector_lock, flags);
-}
-
-/*
- * MSI message composition
- */
-#ifdef CONFIG_PCI_MSI
-static int msi_compose_msg(struct pci_dev *pdev, unsigned int irq, struct msi_msg *msg)
-{
- int vector;
- unsigned dest;
-
- vector = assign_irq_vector(irq);
- if (vector >= 0) {
- dest = cpu_mask_to_apicid(TARGET_CPUS);
-
- msg->address_hi = MSI_ADDR_BASE_HI;
- msg->address_lo =
- MSI_ADDR_BASE_LO |
- ((INT_DEST_MODE == 0) ?
-MSI_ADDR_DEST_MODE_PHYSICAL:
- MSI_ADDR_DEST_MODE_LOGICAL) |
- ((INT_DELIVERY_MODE != dest_LowestPrio) ?
- MSI_ADDR_REDIRECTION_CPU:
- MSI_ADDR_REDIRECTION_LOWPRI) |
- MSI_ADDR_DEST_ID(dest);
-
- msg->data =
- MSI_DATA_TRIGGER_EDGE |
- MSI_DATA_LEVEL_ASSERT |
- ((INT_DELIVERY_MODE != dest_LowestPrio) ?
-MSI_DATA_DELIVERY_FIXED:
- MSI_DATA_DELIVERY_LOWPRI) |
- MSI_DATA_VECTOR(vector);
- }
- return vector;
-}
-
-#ifdef CONFIG_SMP
-static void set_msi_irq_affinity(unsigned int irq, cpumask_t mask)
-{
- struct msi_msg msg;
- unsigned int dest;
- cpumask_t tmp;
- int vector;
-
- cpus_and(tmp, mask, cpu_online_map);
- if (cpus_empty(tmp))
- tmp = TARGET_CPUS;
-
- vector = assign_irq_vector(irq);
- if (vector < 0)
- return;
-
- dest = cpu_mask_to_apicid(mask);
-
- read_msi_msg(irq, &msg);
-
- msg.data &= ~MSI_DATA_VECTOR_MASK;
- msg.data |= MSI_DATA_VECTOR(vector);
- msg.address_lo &= ~MSI_ADDR_DEST_ID_MASK;
- msg.address_lo |= MSI_ADDR_DEST_ID(dest);
-
- write_msi_msg(irq, &msg);
- irq_desc[irq].affinity = mask;
-}
-#endif /* CONFIG_SMP */
-
-/*
- * IRQ Chip for MSI PCI/PCI-X/PCI-Express Devices,
- * which implement the MSI or MSI-X Capability Structure.
- */
-static struct irq_chip msi_chip = {
- .name = "PCI-MSI",
- .unmask = unmask_msi_irq,
- .mask = mask_msi_irq,
- .ack = ack_ioapic_irq,
-#ifdef CONFIG_SMP
- .set_affinity = set_msi_irq_affinity,
-#endif
- .retrigger = ioapic_retrigger_irq,
-};
-
-int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
-{
- struct msi_msg msg;
- int irq, ret;
- irq = create_irq();
- if (irq < 0)
- return irq;
-
- ret = msi_compose_msg(dev, irq, &msg);
- if (ret < 0) {
- destroy_irq(irq);
- return ret;
- }
-
- set_irq_msi(irq, desc);
- write_msi_msg(irq, &msg);
-
- set_irq_chip_and_handler_name(irq, &msi_chip, handle_edge_irq,
- "edge");
-
- return 0;
-}
-
-void arch_teardown_msi_irq(unsigned int irq)
-{
- destroy_irq(irq);
-}
-
-#endif /* CONFIG_PCI_MSI */
-
-/*
- * Hypertransport interrupt support
- */
-#ifdef CONFIG_HT_IRQ
-
-#ifdef CONFIG_SMP
-
-static void target_ht_irq(unsigned int irq, unsigned int dest)
-{
- struct ht_irq_msg msg;
- fetch_ht_irq_msg(irq, &msg);
-
- msg.address_lo &= ~(HT_IRQ_LOW_DEST_ID_MASK);
- msg.address_hi &= ~(HT_IRQ_HIGH_DEST_ID_MASK);
-
- msg.address_lo |= HT_IRQ_LOW_DEST_ID(dest);
- msg.address_hi |= HT_IRQ_HIGH_DEST_ID(dest);
-
- write_ht_irq_msg(irq, &msg);
-}
-
-static void set_ht_irq_affinity(unsigned int irq, cpumask_t mask)
-{
- unsigned int dest;
- cpumask_t tmp;
-
- cpus_and(tmp, mask, cpu_online_map);
- if (cpus_empty(tmp))
- tmp = TARGET_CPUS;
-
- cpus_and(mask, tmp, CPU_MASK_ALL);
-
- dest = cpu_mask_to_apicid(mask);
-
- target_ht_irq(irq, dest);
- irq_desc[irq].affinity = mask;
-}
-#endif
-
-static struct irq_chip ht_irq_chip = {
- .name = "PCI-HT",
- .mask = mask_ht_irq,
- .unmask = unmask_ht_irq,
- .ack = ack_ioapic_irq,
-#ifdef CONFIG_SMP
- .set_affinity = set_ht_irq_affinity,
-#endif
- .retrigger = ioapic_retrigger_irq,
-};
-
-int arch_setup_ht_irq(unsigned int irq, struct pci_dev *dev)
-{
- int vector;
-
- vector = assign_irq_vector(irq);
- if (vector >= 0) {
- struct ht_irq_msg msg;
- unsigned dest;
- cpumask_t tmp;
-
- cpus_clear(tmp);
- cpu_set(vector >> 8, tmp);
- dest = cpu_mask_to_apicid(tmp);
-
- msg.address_hi = HT_IRQ_HIGH_DEST_ID(dest);
-
- msg.address_lo =
- HT_IRQ_LOW_BASE |
- HT_IRQ_LOW_DEST_ID(dest) |
- HT_IRQ_LOW_VECTOR(vector) |
- ((INT_DEST_MODE == 0) ?
- HT_IRQ_LOW_DM_PHYSICAL :
- HT_IRQ_LOW_DM_LOGICAL) |
- HT_IRQ_LOW_RQEOI_EDGE |
- ((INT_DELIVERY_MODE != dest_LowestPrio) ?
- HT_IRQ_LOW_MT_FIXED :
- HT_IRQ_LOW_MT_ARBITRATED) |
- HT_IRQ_LOW_IRQ_MASKED;
-
- write_ht_irq_msg(irq, &msg);
-
- set_irq_chip_and_handler_name(irq, &ht_irq_chip,
- handle_edge_irq, "edge");
- }
- return vector;
-}
-#endif /* CONFIG_HT_IRQ */
-
-/* --------------------------------------------------------------------------
- ACPI-based IOAPIC Configuration
- -------------------------------------------------------------------------- */
-
-#ifdef CONFIG_ACPI
-
-int __init io_apic_get_unique_id(int ioapic, int apic_id)
-{
- union IO_APIC_reg_00 reg_00;
- static physid_mask_t apic_id_map = PHYSID_MASK_NONE;
- physid_mask_t tmp;
- unsigned long flags;
- int i = 0;
-
- /*
- * The P4 platform supports up to 256 APIC IDs on two separate APIC
- * buses (one for LAPICs, one for IOAPICs), where predecessors only
- * supports up to 16 on one shared APIC bus.
- *
- * TBD: Expand LAPIC/IOAPIC support on P4-class systems to take full
- * advantage of new APIC bus architecture.
- */
-
- if (physids_empty(apic_id_map))
- apic_id_map = ioapic_phys_id_map(phys_cpu_present_map);
-
- spin_lock_irqsave(&ioapic_lock, flags);
- reg_00.raw = io_apic_read(ioapic, 0);
- spin_unlock_irqrestore(&ioapic_lock, flags);
-
- if (apic_id >= get_physical_broadcast()) {
- printk(KERN_WARNING "IOAPIC[%d]: Invalid apic_id %d, trying "
- "%d\n", ioapic, apic_id, reg_00.bits.ID);
- apic_id = reg_00.bits.ID;
- }
-
- /*
- * Every APIC in a system must have a unique ID or we get lots of nice
- * 'stuck on smp_invalidate_needed IPI wait' messages.
- */
- if (check_apicid_used(apic_id_map, apic_id)) {
-
- for (i = 0; i < get_physical_broadcast(); i++) {
- if (!check_apicid_used(apic_id_map, i))
- break;
- }
-
- if (i == get_physical_broadcast())
- panic("Max apic_id exceeded!\n");
-
- printk(KERN_WARNING "IOAPIC[%d]: apic_id %d already used, "
- "trying %d\n", ioapic, apic_id, i);
-
- apic_id = i;
- }
-
- tmp = apicid_to_cpu_present(apic_id);
- physids_or(apic_id_map, apic_id_map, tmp);
-
- if (reg_00.bits.ID != apic_id) {
- reg_00.bits.ID = apic_id;
-
- spin_lock_irqsave(&ioapic_lock, flags);
- io_apic_write(ioapic, 0, reg_00.raw);
- reg_00.raw = io_apic_read(ioapic, 0);
- spin_unlock_irqrestore(&ioapic_lock, flags);
-
- /* Sanity check */
- if (reg_00.bits.ID != apic_id) {
- printk("IOAPIC[%d]: Unable to change apic_id!\n", ioapic);
- return -1;
- }
- }
-
- apic_printk(APIC_VERBOSE, KERN_INFO
- "IOAPIC[%d]: Assigned apic_id %d\n", ioapic, apic_id);
-
- return apic_id;
-}
-
-
-int __init io_apic_get_version(int ioapic)
-{
- union IO_APIC_reg_01 reg_01;
- unsigned long flags;
-
- spin_lock_irqsave(&ioapic_lock, flags);
- reg_01.raw = io_apic_read(ioapic, 1);
- spin_unlock_irqrestore(&ioapic_lock, flags);
-
- return reg_01.bits.version;
-}
-
-
-int __init io_apic_get_redir_entries(int ioapic)
-{
- union IO_APIC_reg_01 reg_01;
- unsigned long flags;
-
- spin_lock_irqsave(&ioapic_lock, flags);
- reg_01.raw = io_apic_read(ioapic, 1);
- spin_unlock_irqrestore(&ioapic_lock, flags);
-
- return reg_01.bits.entries;
-}
-
-
-int io_apic_set_pci_routing(int ioapic, int pin, int irq, int edge_level, int active_high_low)
-{
- struct IO_APIC_route_entry entry;
-
- if (!IO_APIC_IRQ(irq)) {
- printk(KERN_ERR "IOAPIC[%d]: Invalid reference to IRQ 0\n",
- ioapic);
- return -EINVAL;
- }
-
- /*
- * Generate a PCI IRQ routing entry and program the IOAPIC accordingly.
- * Note that we mask (disable) IRQs now -- these get enabled when the
- * corresponding device driver registers for this IRQ.
- */
-
- memset(&entry, 0, sizeof(entry));
-
- entry.delivery_mode = INT_DELIVERY_MODE;
- entry.dest_mode = INT_DEST_MODE;
- entry.dest.logical.logical_dest = cpu_mask_to_apicid(TARGET_CPUS);
- entry.trigger = edge_level;
- entry.polarity = active_high_low;
- entry.mask = 1;
-
- /*
- * IRQs < 16 are already in the irq_2_pin[] map
- */
- if (irq >= 16)
- add_pin_to_irq(irq, ioapic, pin);
-
- entry.vector = assign_irq_vector(irq);
-
- apic_printk(APIC_DEBUG, KERN_DEBUG "IOAPIC[%d]: Set PCI routing entry "
- "(%d-%d -> 0x%x -> IRQ %d Mode:%i Active:%i)\n", ioapic,
- mp_ioapics[ioapic].mp_apicid, pin, entry.vector, irq,
- edge_level, active_high_low);
-
- ioapic_register_intr(irq, entry.vector, edge_level);
-
- if (!ioapic && (irq < 16))
- disable_8259A_irq(irq);
-
- ioapic_write_entry(ioapic, pin, entry);
-
- return 0;
-}
-
-int acpi_get_override_irq(int bus_irq, int *trigger, int *polarity)
-{
- int i;
-
- if (skip_ioapic_setup)
- return -1;
-
- for (i = 0; i < mp_irq_entries; i++)
- if (mp_irqs[i].mp_irqtype == mp_INT &&
- mp_irqs[i].mp_srcbusirq == bus_irq)
- break;
- if (i >= mp_irq_entries)
- return -1;
-
- *trigger = irq_trigger(i);
- *polarity = irq_polarity(i);
- return 0;
-}
-
-#endif /* CONFIG_ACPI */
-
-static int __init parse_disable_timer_pin_1(char *arg)
-{
- disable_timer_pin_1 = 1;
- return 0;
-}
-early_param("disable_timer_pin_1", parse_disable_timer_pin_1);
-
-static int __init parse_enable_timer_pin_1(char *arg)
-{
- disable_timer_pin_1 = -1;
- return 0;
-}
-early_param("enable_timer_pin_1", parse_enable_timer_pin_1);
-
-static int __init parse_noapic(char *arg)
-{
- /* disable IO-APIC */
- disable_ioapic_setup();
- return 0;
-}
-early_param("noapic", parse_noapic);
-
-void __init ioapic_init_mappings(void)
-{
- unsigned long ioapic_phys, idx = FIX_IO_APIC_BASE_0;
- int i;
-
- for (i = 0; i < nr_ioapics; i++) {
- if (smp_found_config) {
- ioapic_phys = mp_ioapics[i].mp_apicaddr;
- if (!ioapic_phys) {
- printk(KERN_ERR
- "WARNING: bogus zero IO-APIC "
- "address found in MPTABLE, "
- "disabling IO/APIC support!\n");
- smp_found_config = 0;
- skip_ioapic_setup = 1;
- goto fake_ioapic_page;
- }
- } else {
-fake_ioapic_page:
- ioapic_phys = (unsigned long)
- alloc_bootmem_pages(PAGE_SIZE);
- ioapic_phys = __pa(ioapic_phys);
- }
- set_fixmap_nocache(idx, ioapic_phys);
- printk(KERN_DEBUG "mapped IOAPIC to %08lx (%08lx)\n",
- __fix_to_virt(idx), ioapic_phys);
- idx++;
- }
-}
-
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
new file mode 100644
index 00000000000..ccf6c503fc3
--- /dev/null
+++ b/arch/x86/kernel/irq.c
@@ -0,0 +1,189 @@
+/*
+ * Common interrupt code for 32 and 64 bit
+ */
+#include <linux/cpu.h>
+#include <linux/interrupt.h>
+#include <linux/kernel_stat.h>
+#include <linux/seq_file.h>
+
+#include <asm/apic.h>
+#include <asm/io_apic.h>
+#include <asm/smp.h>
+
+atomic_t irq_err_count;
+
+/*
+ * 'what should we do if we get a hw irq event on an illegal vector'.
+ * each architecture has to answer this themselves.
+ */
+void ack_bad_irq(unsigned int irq)
+{
+ printk(KERN_ERR "unexpected IRQ trap at vector %02x\n", irq);
+
+#ifdef CONFIG_X86_LOCAL_APIC
+ /*
+ * Currently unexpected vectors happen only on SMP and APIC.
+ * We _must_ ack these because every local APIC has only N
+ * irq slots per priority level, and a 'hanging, unacked' IRQ
+ * holds up an irq slot - in excessive cases (when multiple
+ * unexpected vectors occur) that might lock up the APIC
+ * completely.
+ * But only ack when the APIC is enabled -AK
+ */
+ if (cpu_has_apic)
+ ack_APIC_irq();
+#endif
+}
+
+#ifdef CONFIG_X86_32
+# define irq_stats(x) (&per_cpu(irq_stat,x))
+#else
+# define irq_stats(x) cpu_pda(x)
+#endif
+/*
+ * /proc/interrupts printing:
+ */
+static int show_other_interrupts(struct seq_file *p)
+{
+ int j;
+
+ seq_printf(p, "NMI: ");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", irq_stats(j)->__nmi_count);
+ seq_printf(p, " Non-maskable interrupts\n");
+#ifdef CONFIG_X86_LOCAL_APIC
+ seq_printf(p, "LOC: ");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", irq_stats(j)->apic_timer_irqs);
+ seq_printf(p, " Local timer interrupts\n");
+#endif
+#ifdef CONFIG_SMP
+ seq_printf(p, "RES: ");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", irq_stats(j)->irq_resched_count);
+ seq_printf(p, " Rescheduling interrupts\n");
+ seq_printf(p, "CAL: ");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", irq_stats(j)->irq_call_count);
+ seq_printf(p, " Function call interrupts\n");
+ seq_printf(p, "TLB: ");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", irq_stats(j)->irq_tlb_count);
+ seq_printf(p, " TLB shootdowns\n");
+#endif
+#ifdef CONFIG_X86_MCE
+ seq_printf(p, "TRM: ");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", irq_stats(j)->irq_thermal_count);
+ seq_printf(p, " Thermal event interrupts\n");
+# ifdef CONFIG_X86_64
+ seq_printf(p, "THR: ");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", irq_stats(j)->irq_threshold_count);
+ seq_printf(p, " Threshold APIC interrupts\n");
+# endif
+#endif
+#ifdef CONFIG_X86_LOCAL_APIC
+ seq_printf(p, "SPU: ");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", irq_stats(j)->irq_spurious_count);
+ seq_printf(p, " Spurious interrupts\n");
+#endif
+ seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count));
+#if defined(CONFIG_X86_IO_APIC)
+ seq_printf(p, "MIS: %10u\n", atomic_read(&irq_mis_count));
+#endif
+ return 0;
+}
+
+int show_interrupts(struct seq_file *p, void *v)
+{
+ unsigned long flags, any_count = 0;
+ int i = *(loff_t *) v, j;
+ struct irqaction *action;
+ struct irq_desc *desc;
+
+ if (i > nr_irqs)
+ return 0;
+
+ if (i == nr_irqs)
+ return show_other_interrupts(p);
+
+ /* print header */
+ if (i == 0) {
+ seq_printf(p, " ");
+ for_each_online_cpu(j)
+ seq_printf(p, "CPU%-8d",j);
+ seq_putc(p, '\n');
+ }
+
+ desc = irq_to_desc(i);
+ spin_lock_irqsave(&desc->lock, flags);
+#ifndef CONFIG_SMP
+ any_count = kstat_irqs(i);
+#else
+ for_each_online_cpu(j)
+ any_count |= kstat_irqs_cpu(i, j);
+#endif
+ action = desc->action;
+ if (!action && !any_count)
+ goto out;
+
+ seq_printf(p, "%3d: ", i);
+#ifndef CONFIG_SMP
+ seq_printf(p, "%10u ", kstat_irqs(i));
+#else
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", kstat_irqs_cpu(i, j));
+#endif
+ seq_printf(p, " %8s", desc->chip->name);
+ seq_printf(p, "-%-8s", desc->name);
+
+ if (action) {
+ seq_printf(p, " %s", action->name);
+ while ((action = action->next) != NULL)
+ seq_printf(p, ", %s", action->name);
+ }
+
+ seq_putc(p, '\n');
+out:
+ spin_unlock_irqrestore(&desc->lock, flags);
+ return 0;
+}
+
+/*
+ * /proc/stat helpers
+ */
+u64 arch_irq_stat_cpu(unsigned int cpu)
+{
+ u64 sum = irq_stats(cpu)->__nmi_count;
+
+#ifdef CONFIG_X86_LOCAL_APIC
+ sum += irq_stats(cpu)->apic_timer_irqs;
+#endif
+#ifdef CONFIG_SMP
+ sum += irq_stats(cpu)->irq_resched_count;
+ sum += irq_stats(cpu)->irq_call_count;
+ sum += irq_stats(cpu)->irq_tlb_count;
+#endif
+#ifdef CONFIG_X86_MCE
+ sum += irq_stats(cpu)->irq_thermal_count;
+# ifdef CONFIG_X86_64
+ sum += irq_stats(cpu)->irq_threshold_count;
+#endif
+#endif
+#ifdef CONFIG_X86_LOCAL_APIC
+ sum += irq_stats(cpu)->irq_spurious_count;
+#endif
+ return sum;
+}
+
+u64 arch_irq_stat(void)
+{
+ u64 sum = atomic_read(&irq_err_count);
+
+#ifdef CONFIG_X86_IO_APIC
+ sum += atomic_read(&irq_mis_count);
+#endif
+ return sum;
+}
diff --git a/arch/x86/kernel/irq_32.c b/arch/x86/kernel/irq_32.c
index b71e02d42f4..a51382672de 100644
--- a/arch/x86/kernel/irq_32.c
+++ b/arch/x86/kernel/irq_32.c
@@ -25,29 +25,6 @@ EXPORT_PER_CPU_SYMBOL(irq_stat);
DEFINE_PER_CPU(struct pt_regs *, irq_regs);
EXPORT_PER_CPU_SYMBOL(irq_regs);
-/*
- * 'what should we do if we get a hw irq event on an illegal vector'.
- * each architecture has to answer this themselves.
- */
-void ack_bad_irq(unsigned int irq)
-{
- printk(KERN_ERR "unexpected IRQ trap at vector %02x\n", irq);
-
-#ifdef CONFIG_X86_LOCAL_APIC
- /*
- * Currently unexpected vectors happen only on SMP and APIC.
- * We _must_ ack these because every local APIC has only N
- * irq slots per priority level, and a 'hanging, unacked' IRQ
- * holds up an irq slot - in excessive cases (when multiple
- * unexpected vectors occur) that might lock up the APIC
- * completely.
- * But only ack when the APIC is enabled -AK
- */
- if (cpu_has_apic)
- ack_APIC_irq();
-#endif
-}
-
#ifdef CONFIG_DEBUG_STACKOVERFLOW
/* Debugging check for stack overflow: is there less than 1KB free? */
static int check_stack_overflow(void)
@@ -223,20 +200,25 @@ unsigned int do_IRQ(struct pt_regs *regs)
{
struct pt_regs *old_regs;
/* high bit used in ret_from_ code */
- int overflow, irq = ~regs->orig_ax;
- struct irq_desc *desc = irq_desc + irq;
+ int overflow;
+ unsigned vector = ~regs->orig_ax;
+ struct irq_desc *desc;
+ unsigned irq;
- if (unlikely((unsigned)irq >= NR_IRQS)) {
- printk(KERN_EMERG "%s: cannot handle IRQ %d\n",
- __func__, irq);
- BUG();
- }
old_regs = set_irq_regs(regs);
irq_enter();
+ irq = __get_cpu_var(vector_irq)[vector];
overflow = check_stack_overflow();
+ desc = irq_to_desc(irq);
+ if (unlikely(!desc)) {
+ printk(KERN_EMERG "%s: cannot handle IRQ %d vector %#x cpu %d\n",
+ __func__, irq, vector, smp_processor_id());
+ BUG();
+ }
+
if (!execute_on_irq_stack(overflow, desc, irq)) {
if (unlikely(overflow))
print_stack_overflow();
@@ -248,146 +230,6 @@ unsigned int do_IRQ(struct pt_regs *regs)
return 1;
}
-/*
- * Interrupt statistics:
- */
-
-atomic_t irq_err_count;
-
-/*
- * /proc/interrupts printing:
- */
-
-int show_interrupts(struct seq_file *p, void *v)
-{
- int i = *(loff_t *) v, j;
- struct irqaction * action;
- unsigned long flags;
-
- if (i == 0) {
- seq_printf(p, " ");
- for_each_online_cpu(j)
- seq_printf(p, "CPU%-8d",j);
- seq_putc(p, '\n');
- }
-
- if (i < NR_IRQS) {
- unsigned any_count = 0;
-
- spin_lock_irqsave(&irq_desc[i].lock, flags);
-#ifndef CONFIG_SMP
- any_count = kstat_irqs(i);
-#else
- for_each_online_cpu(j)
- any_count |= kstat_cpu(j).irqs[i];
-#endif
- action = irq_desc[i].action;
- if (!action && !any_count)
- goto skip;
- seq_printf(p, "%3d: ",i);
-#ifndef CONFIG_SMP
- seq_printf(p, "%10u ", kstat_irqs(i));
-#else
- for_each_online_cpu(j)
- seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
-#endif
- seq_printf(p, " %8s", irq_desc[i].chip->name);
- seq_printf(p, "-%-8s", irq_desc[i].name);
-
- if (action) {
- seq_printf(p, " %s", action->name);
- while ((action = action->next) != NULL)
- seq_printf(p, ", %s", action->name);
- }
-
- seq_putc(p, '\n');
-skip:
- spin_unlock_irqrestore(&irq_desc[i].lock, flags);
- } else if (i == NR_IRQS) {
- seq_printf(p, "NMI: ");
- for_each_online_cpu(j)
- seq_printf(p, "%10u ", nmi_count(j));
- seq_printf(p, " Non-maskable interrupts\n");
-#ifdef CONFIG_X86_LOCAL_APIC
- seq_printf(p, "LOC: ");
- for_each_online_cpu(j)
- seq_printf(p, "%10u ",
- per_cpu(irq_stat,j).apic_timer_irqs);
- seq_printf(p, " Local timer interrupts\n");
-#endif
-#ifdef CONFIG_SMP
- seq_printf(p, "RES: ");
- for_each_online_cpu(j)
- seq_printf(p, "%10u ",
- per_cpu(irq_stat,j).irq_resched_count);
- seq_printf(p, " Rescheduling interrupts\n");
- seq_printf(p, "CAL: ");
- for_each_online_cpu(j)
- seq_printf(p, "%10u ",
- per_cpu(irq_stat,j).irq_call_count);
- seq_printf(p, " Function call interrupts\n");
- seq_printf(p, "TLB: ");
- for_each_online_cpu(j)
- seq_printf(p, "%10u ",
- per_cpu(irq_stat,j).irq_tlb_count);
- seq_printf(p, " TLB shootdowns\n");
-#endif
-#ifdef CONFIG_X86_MCE
- seq_printf(p, "TRM: ");
- for_each_online_cpu(j)
- seq_printf(p, "%10u ",
- per_cpu(irq_stat,j).irq_thermal_count);
- seq_printf(p, " Thermal event interrupts\n");
-#endif
-#ifdef CONFIG_X86_LOCAL_APIC
- seq_printf(p, "SPU: ");
- for_each_online_cpu(j)
- seq_printf(p, "%10u ",
- per_cpu(irq_stat,j).irq_spurious_count);
- seq_printf(p, " Spurious interrupts\n");
-#endif
- seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count));
-#if defined(CONFIG_X86_IO_APIC)
- seq_printf(p, "MIS: %10u\n", atomic_read(&irq_mis_count));
-#endif
- }
- return 0;
-}
-
-/*
- * /proc/stat helpers
- */
-u64 arch_irq_stat_cpu(unsigned int cpu)
-{
- u64 sum = nmi_count(cpu);
-
-#ifdef CONFIG_X86_LOCAL_APIC
- sum += per_cpu(irq_stat, cpu).apic_timer_irqs;
-#endif
-#ifdef CONFIG_SMP
- sum += per_cpu(irq_stat, cpu).irq_resched_count;
- sum += per_cpu(irq_stat, cpu).irq_call_count;
- sum += per_cpu(irq_stat, cpu).irq_tlb_count;
-#endif
-#ifdef CONFIG_X86_MCE
- sum += per_cpu(irq_stat, cpu).irq_thermal_count;
-#endif
-#ifdef CONFIG_X86_LOCAL_APIC
- sum += per_cpu(irq_stat, cpu).irq_spurious_count;
-#endif
- return sum;
-}
-
-u64 arch_irq_stat(void)
-{
- u64 sum = atomic_read(&irq_err_count);
-
-#ifdef CONFIG_X86_IO_APIC
- sum += atomic_read(&irq_mis_count);
-#endif
- return sum;
-}
-
#ifdef CONFIG_HOTPLUG_CPU
#include <mach_apic.h>
@@ -395,20 +237,22 @@ void fixup_irqs(cpumask_t map)
{
unsigned int irq;
static int warned;
+ struct irq_desc *desc;
- for (irq = 0; irq < NR_IRQS; irq++) {
+ for_each_irq_desc(irq, desc) {
cpumask_t mask;
+
if (irq == 2)
continue;
- cpus_and(mask, irq_desc[irq].affinity, map);
+ cpus_and(mask, desc->affinity, map);
if (any_online_cpu(mask) == NR_CPUS) {
printk("Breaking affinity for irq %i\n", irq);
mask = map;
}
- if (irq_desc[irq].chip->set_affinity)
- irq_desc[irq].chip->set_affinity(irq, mask);
- else if (irq_desc[irq].action && !(warned++))
+ if (desc->chip->set_affinity)
+ desc->chip->set_affinity(irq, mask);
+ else if (desc->action && !(warned++))
printk("Cannot set affinity for irq %i\n", irq);
}
diff --git a/arch/x86/kernel/irq_64.c b/arch/x86/kernel/irq_64.c
index f065fe9071b..60eb84eb77a 100644
--- a/arch/x86/kernel/irq_64.c
+++ b/arch/x86/kernel/irq_64.c
@@ -18,28 +18,6 @@
#include <asm/idle.h>
#include <asm/smp.h>
-atomic_t irq_err_count;
-
-/*
- * 'what should we do if we get a hw irq event on an illegal vector'.
- * each architecture has to answer this themselves.
- */
-void ack_bad_irq(unsigned int irq)
-{
- printk(KERN_WARNING "unexpected IRQ trap at vector %02x\n", irq);
- /*
- * Currently unexpected vectors happen only on SMP and APIC.
- * We _must_ ack these because every local APIC has only N
- * irq slots per priority level, and a 'hanging, unacked' IRQ
- * holds up an irq slot - in excessive cases (when multiple
- * unexpected vectors occur) that might lock up the APIC
- * completely.
- * But don't ack when the APIC is disabled. -AK
- */
- if (!disable_apic)
- ack_APIC_irq();
-}
-
#ifdef CONFIG_DEBUG_STACKOVERFLOW
/*
* Probabilistic stack overflow check:
@@ -65,122 +43,6 @@ static inline void stack_overflow_check(struct pt_regs *regs)
#endif
/*
- * Generic, controller-independent functions:
- */
-
-int show_interrupts(struct seq_file *p, void *v)
-{
- int i = *(loff_t *) v, j;
- struct irqaction * action;
- unsigned long flags;
-
- if (i == 0) {
- seq_printf(p, " ");
- for_each_online_cpu(j)
- seq_printf(p, "CPU%-8d",j);
- seq_putc(p, '\n');
- }
-
- if (i < NR_IRQS) {
- unsigned any_count = 0;
-
- spin_lock_irqsave(&irq_desc[i].lock, flags);
-#ifndef CONFIG_SMP
- any_count = kstat_irqs(i);
-#else
- for_each_online_cpu(j)
- any_count |= kstat_cpu(j).irqs[i];
-#endif
- action = irq_desc[i].action;
- if (!action && !any_count)
- goto skip;
- seq_printf(p, "%3d: ",i);
-#ifndef CONFIG_SMP
- seq_printf(p, "%10u ", kstat_irqs(i));
-#else
- for_each_online_cpu(j)
- seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
-#endif
- seq_printf(p, " %8s", irq_desc[i].chip->name);
- seq_printf(p, "-%-8s", irq_desc[i].name);
-
- if (action) {
- seq_printf(p, " %s", action->name);
- while ((action = action->next) != NULL)
- seq_printf(p, ", %s", action->name);
- }
- seq_putc(p, '\n');
-skip:
- spin_unlock_irqrestore(&irq_desc[i].lock, flags);
- } else if (i == NR_IRQS) {
- seq_printf(p, "NMI: ");
- for_each_online_cpu(j)
- seq_printf(p, "%10u ", cpu_pda(j)->__nmi_count);
- seq_printf(p, " Non-maskable interrupts\n");
- seq_printf(p, "LOC: ");
- for_each_online_cpu(j)
- seq_printf(p, "%10u ", cpu_pda(j)->apic_timer_irqs);
- seq_printf(p, " Local timer interrupts\n");
-#ifdef CONFIG_SMP
- seq_printf(p, "RES: ");
- for_each_online_cpu(j)
- seq_printf(p, "%10u ", cpu_pda(j)->irq_resched_count);
- seq_printf(p, " Rescheduling interrupts\n");
- seq_printf(p, "CAL: ");
- for_each_online_cpu(j)
- seq_printf(p, "%10u ", cpu_pda(j)->irq_call_count);
- seq_printf(p, " Function call interrupts\n");
- seq_printf(p, "TLB: ");
- for_each_online_cpu(j)
- seq_printf(p, "%10u ", cpu_pda(j)->irq_tlb_count);
- seq_printf(p, " TLB shootdowns\n");
-#endif
-#ifdef CONFIG_X86_MCE
- seq_printf(p, "TRM: ");
- for_each_online_cpu(j)
- seq_printf(p, "%10u ", cpu_pda(j)->irq_thermal_count);
- seq_printf(p, " Thermal event interrupts\n");
- seq_printf(p, "THR: ");
- for_each_online_cpu(j)
- seq_printf(p, "%10u ", cpu_pda(j)->irq_threshold_count);
- seq_printf(p, " Threshold APIC interrupts\n");
-#endif
- seq_printf(p, "SPU: ");
- for_each_online_cpu(j)
- seq_printf(p, "%10u ", cpu_pda(j)->irq_spurious_count);
- seq_printf(p, " Spurious interrupts\n");
- seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count));
- }
- return 0;
-}
-
-/*
- * /proc/stat helpers
- */
-u64 arch_irq_stat_cpu(unsigned int cpu)
-{
- u64 sum = cpu_pda(cpu)->__nmi_count;
-
- sum += cpu_pda(cpu)->apic_timer_irqs;
-#ifdef CONFIG_SMP
- sum += cpu_pda(cpu)->irq_resched_count;
- sum += cpu_pda(cpu)->irq_call_count;
- sum += cpu_pda(cpu)->irq_tlb_count;
-#endif
-#ifdef CONFIG_X86_MCE
- sum += cpu_pda(cpu)->irq_thermal_count;
- sum += cpu_pda(cpu)->irq_threshold_count;
-#endif
- sum += cpu_pda(cpu)->irq_spurious_count;
- return sum;
-}
-
-u64 arch_irq_stat(void)
-{
- return atomic_read(&irq_err_count);
-}
-
-/*
* do_IRQ handles all normal device IRQ's (the special
* SMP cross-CPU interrupts have their own specific
* handlers).
@@ -188,6 +50,7 @@ u64 arch_irq_stat(void)
asmlinkage unsigned int do_IRQ(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
+ struct irq_desc *desc;
/* high bit used in ret_from_ code */
unsigned vector = ~regs->orig_ax;
@@ -201,8 +64,9 @@ asmlinkage unsigned int do_IRQ(struct pt_regs *regs)
stack_overflow_check(regs);
#endif
- if (likely(irq < NR_IRQS))
- generic_handle_irq(irq);
+ desc = irq_to_desc(irq);
+ if (likely(desc))
+ generic_handle_irq_desc(irq, desc);
else {
if (!disable_apic)
ack_APIC_irq();
@@ -223,8 +87,9 @@ void fixup_irqs(cpumask_t map)
{
unsigned int irq;
static int warned;
+ struct irq_desc *desc;
- for (irq = 0; irq < NR_IRQS; irq++) {
+ for_each_irq_desc(irq, desc) {
cpumask_t mask;
int break_affinity = 0;
int set_affinity = 1;
@@ -233,32 +98,32 @@ void fixup_irqs(cpumask_t map)
continue;
/* interrupt's are disabled at this point */
- spin_lock(&irq_desc[irq].lock);
+ spin_lock(&desc->lock);
if (!irq_has_action(irq) ||
- cpus_equal(irq_desc[irq].affinity, map)) {
- spin_unlock(&irq_desc[irq].lock);
+ cpus_equal(desc->affinity, map)) {
+ spin_unlock(&desc->lock);
continue;
}
- cpus_and(mask, irq_desc[irq].affinity, map);
+ cpus_and(mask, desc->affinity, map);
if (cpus_empty(mask)) {
break_affinity = 1;
mask = map;
}
- if (irq_desc[irq].chip->mask)
- irq_desc[irq].chip->mask(irq);
+ if (desc->chip->mask)
+ desc->chip->mask(irq);
- if (irq_desc[irq].chip->set_affinity)
- irq_desc[irq].chip->set_affinity(irq, mask);
+ if (desc->chip->set_affinity)
+ desc->chip->set_affinity(irq, mask);
else if (!(warned++))
set_affinity = 0;
- if (irq_desc[irq].chip->unmask)
- irq_desc[irq].chip->unmask(irq);
+ if (desc->chip->unmask)
+ desc->chip->unmask(irq);
- spin_unlock(&irq_desc[irq].lock);
+ spin_unlock(&desc->lock);
if (break_affinity && set_affinity)
printk("Broke affinity for irq %i\n", irq);
diff --git a/arch/x86/kernel/irqinit_32.c b/arch/x86/kernel/irqinit_32.c
index 9200a1e2752..845aa9803e8 100644
--- a/arch/x86/kernel/irqinit_32.c
+++ b/arch/x86/kernel/irqinit_32.c
@@ -69,6 +69,13 @@ void __init init_ISA_irqs (void)
* 16 old-style INTA-cycle interrupts:
*/
for (i = 0; i < 16; i++) {
+ /* first time call this irq_desc */
+ struct irq_desc *desc = irq_to_desc(i);
+
+ desc->status = IRQ_DISABLED;
+ desc->action = NULL;
+ desc->depth = 1;
+
set_irq_chip_and_handler_name(i, &i8259A_chip,
handle_level_irq, "XT");
}
@@ -83,6 +90,27 @@ static struct irqaction irq2 = {
.name = "cascade",
};
+DEFINE_PER_CPU(vector_irq_t, vector_irq) = {
+ [0 ... IRQ0_VECTOR - 1] = -1,
+ [IRQ0_VECTOR] = 0,
+ [IRQ1_VECTOR] = 1,
+ [IRQ2_VECTOR] = 2,
+ [IRQ3_VECTOR] = 3,
+ [IRQ4_VECTOR] = 4,
+ [IRQ5_VECTOR] = 5,
+ [IRQ6_VECTOR] = 6,
+ [IRQ7_VECTOR] = 7,
+ [IRQ8_VECTOR] = 8,
+ [IRQ9_VECTOR] = 9,
+ [IRQ10_VECTOR] = 10,
+ [IRQ11_VECTOR] = 11,
+ [IRQ12_VECTOR] = 12,
+ [IRQ13_VECTOR] = 13,
+ [IRQ14_VECTOR] = 14,
+ [IRQ15_VECTOR] = 15,
+ [IRQ15_VECTOR + 1 ... NR_VECTORS - 1] = -1
+};
+
/* Overridden in paravirt.c */
void init_IRQ(void) __attribute__((weak, alias("native_init_IRQ")));
@@ -98,22 +126,14 @@ void __init native_init_IRQ(void)
* us. (some of these will be overridden and become
* 'special' SMP interrupts)
*/
- for (i = 0; i < (NR_VECTORS - FIRST_EXTERNAL_VECTOR); i++) {
- int vector = FIRST_EXTERNAL_VECTOR + i;
- if (i >= NR_IRQS)
- break;
+ for (i = FIRST_EXTERNAL_VECTOR; i < NR_VECTORS; i++) {
/* SYSCALL_VECTOR was reserved in trap_init. */
- if (!test_bit(vector, used_vectors))
- set_intr_gate(vector, interrupt[i]);
+ if (i != SYSCALL_VECTOR)
+ set_intr_gate(i, interrupt[i]);
}
-#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_SMP)
- /*
- * IRQ0 must be given a fixed assignment and initialized,
- * because it's used before the IO-APIC is set up.
- */
- set_intr_gate(FIRST_DEVICE_VECTOR, interrupt[0]);
+#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_SMP)
/*
* The reschedule interrupt is a CPU-to-CPU reschedule-helper
* IPI, driven by wakeup.
@@ -128,6 +148,9 @@ void __init native_init_IRQ(void)
/* IPI for single call function */
set_intr_gate(CALL_FUNCTION_SINGLE_VECTOR, call_function_single_interrupt);
+
+ /* Low priority IPI to cleanup after moving an irq */
+ set_intr_gate(IRQ_MOVE_CLEANUP_VECTOR, irq_move_cleanup_interrupt);
#endif
#ifdef CONFIG_X86_LOCAL_APIC
diff --git a/arch/x86/kernel/irqinit_64.c b/arch/x86/kernel/irqinit_64.c
index 5b5be9d43c2..ff023539128 100644
--- a/arch/x86/kernel/irqinit_64.c
+++ b/arch/x86/kernel/irqinit_64.c
@@ -142,23 +142,19 @@ void __init init_ISA_irqs(void)
init_bsp_APIC();
init_8259A(0);
- for (i = 0; i < NR_IRQS; i++) {
- irq_desc[i].status = IRQ_DISABLED;
- irq_desc[i].action = NULL;
- irq_desc[i].depth = 1;
-
- if (i < 16) {
- /*
- * 16 old-style INTA-cycle interrupts:
- */
- set_irq_chip_and_handler_name(i, &i8259A_chip,
+ for (i = 0; i < 16; i++) {
+ /* first time call this irq_desc */
+ struct irq_desc *desc = irq_to_desc(i);
+
+ desc->status = IRQ_DISABLED;
+ desc->action = NULL;
+ desc->depth = 1;
+
+ /*
+ * 16 old-style INTA-cycle interrupts:
+ */
+ set_irq_chip_and_handler_name(i, &i8259A_chip,
handle_level_irq, "XT");
- } else {
- /*
- * 'high' PCI IRQs filled in on demand
- */
- irq_desc[i].chip = &no_irq_chip;
- }
}
}
diff --git a/arch/x86/kernel/quirks.c b/arch/x86/kernel/quirks.c
index f6a11b9b1f9..67465ed8931 100644
--- a/arch/x86/kernel/quirks.c
+++ b/arch/x86/kernel/quirks.c
@@ -35,9 +35,6 @@ static void __devinit quirk_intel_irqbalance(struct pci_dev *dev)
if (!(word & (1 << 13))) {
dev_info(&dev->dev, "Intel E7520/7320/7525 detected; "
"disabling irq balancing and affinity\n");
-#ifdef CONFIG_IRQBALANCE
- irqbalance_disable("");
-#endif
noirqdebug_setup("");
#ifdef CONFIG_PROC_FS
no_irq_affinity = 1;
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index b2c97874ec0..0fa6790c1dd 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1073,6 +1073,7 @@ void __init setup_arch(char **cmdline_p)
#endif
prefill_possible_map();
+
#ifdef CONFIG_X86_64
init_cpu_to_node();
#endif
@@ -1080,6 +1081,9 @@ void __init setup_arch(char **cmdline_p)
init_apic_mappings();
ioapic_init_mappings();
+ /* need to wait for io_apic is mapped */
+ nr_irqs = probe_nr_irqs();
+
kvm_guest_init();
e820_reserve_resources();
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index 0e67f72d931..410c88f0bfe 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -140,25 +140,30 @@ static void __init setup_cpu_pda_map(void)
*/
void __init setup_per_cpu_areas(void)
{
- ssize_t size = PERCPU_ENOUGH_ROOM;
+ ssize_t size, old_size;
char *ptr;
int cpu;
+ unsigned long align = 1;
/* Setup cpu_pda map */
setup_cpu_pda_map();
/* Copy section for each CPU (we discard the original) */
- size = PERCPU_ENOUGH_ROOM;
+ old_size = PERCPU_ENOUGH_ROOM;
+ align = max_t(unsigned long, PAGE_SIZE, align);
+ size = roundup(old_size, align);
printk(KERN_INFO "PERCPU: Allocating %zd bytes of per cpu data\n",
size);
for_each_possible_cpu(cpu) {
#ifndef CONFIG_NEED_MULTIPLE_NODES
- ptr = alloc_bootmem_pages(size);
+ ptr = __alloc_bootmem(size, align,
+ __pa(MAX_DMA_ADDRESS));
#else
int node = early_cpu_to_node(cpu);
if (!node_online(node) || !NODE_DATA(node)) {
- ptr = alloc_bootmem_pages(size);
+ ptr = __alloc_bootmem(size, align,
+ __pa(MAX_DMA_ADDRESS));
printk(KERN_INFO
"cpu %d has no node %d or node-local memory\n",
cpu, node);
@@ -167,7 +172,8 @@ void __init setup_per_cpu_areas(void)
cpu, __pa(ptr));
}
else {
- ptr = alloc_bootmem_pages_node(NODE_DATA(node), size);
+ ptr = __alloc_bootmem_node(NODE_DATA(node), size, align,
+ __pa(MAX_DMA_ADDRESS));
if (ptr)
printk(KERN_DEBUG "per cpu data for cpu%d on node%d at %016lx\n",
cpu, node, __pa(ptr));
@@ -175,7 +181,6 @@ void __init setup_per_cpu_areas(void)
#endif
per_cpu_offset(cpu) = ptr - __per_cpu_start;
memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
-
}
printk(KERN_DEBUG "NR_CPUS: %d, nr_cpu_ids: %d, nr_node_ids %d\n",
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 7ed9e070a6e..7ece815ea63 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -543,10 +543,10 @@ static inline void __inquire_remote_apic(int apicid)
int timeout;
u32 status;
- printk(KERN_INFO "Inquiring remote APIC #%d...\n", apicid);
+ printk(KERN_INFO "Inquiring remote APIC 0x%x...\n", apicid);
for (i = 0; i < ARRAY_SIZE(regs); i++) {
- printk(KERN_INFO "... APIC #%d %s: ", apicid, names[i]);
+ printk(KERN_INFO "... APIC 0x%x %s: ", apicid, names[i]);
/*
* Wait for idle.
@@ -874,7 +874,7 @@ do_rest:
start_ip = setup_trampoline();
/* So we see what's up */
- printk(KERN_INFO "Booting processor %d/%d ip %lx\n",
+ printk(KERN_INFO "Booting processor %d APIC 0x%x ip 0x%lx\n",
cpu, apicid, start_ip);
/*
diff --git a/arch/x86/kernel/uv_irq.c b/arch/x86/kernel/uv_irq.c
new file mode 100644
index 00000000000..aeef529917e
--- /dev/null
+++ b/arch/x86/kernel/uv_irq.c
@@ -0,0 +1,79 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * SGI UV IRQ functions
+ *
+ * Copyright (C) 2008 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#include <linux/module.h>
+#include <linux/irq.h>
+
+#include <asm/apic.h>
+#include <asm/uv/uv_irq.h>
+
+static void uv_noop(unsigned int irq)
+{
+}
+
+static unsigned int uv_noop_ret(unsigned int irq)
+{
+ return 0;
+}
+
+static void uv_ack_apic(unsigned int irq)
+{
+ ack_APIC_irq();
+}
+
+struct irq_chip uv_irq_chip = {
+ .name = "UV-CORE",
+ .startup = uv_noop_ret,
+ .shutdown = uv_noop,
+ .enable = uv_noop,
+ .disable = uv_noop,
+ .ack = uv_noop,
+ .mask = uv_noop,
+ .unmask = uv_noop,
+ .eoi = uv_ack_apic,
+ .end = uv_noop,
+};
+
+/*
+ * Set up a mapping of an available irq and vector, and enable the specified
+ * MMR that defines the MSI that is to be sent to the specified CPU when an
+ * interrupt is raised.
+ */
+int uv_setup_irq(char *irq_name, int cpu, int mmr_blade,
+ unsigned long mmr_offset)
+{
+ int irq;
+ int ret;
+
+ irq = create_irq();
+ if (irq <= 0)
+ return -EBUSY;
+
+ ret = arch_enable_uv_irq(irq_name, irq, cpu, mmr_blade, mmr_offset);
+ if (ret != irq)
+ destroy_irq(irq);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(uv_setup_irq);
+
+/*
+ * Tear down a mapping of an irq and vector, and disable the specified MMR that
+ * defined the MSI that was to be sent to the specified CPU when an interrupt
+ * was raised.
+ *
+ * Set mmr_blade and mmr_offset to what was passed in on uv_setup_irq().
+ */
+void uv_teardown_irq(unsigned int irq, int mmr_blade, unsigned long mmr_offset)
+{
+ arch_disable_uv_irq(mmr_blade, mmr_offset);
+ destroy_irq(irq);
+}
+EXPORT_SYMBOL_GPL(uv_teardown_irq);
diff --git a/arch/x86/kernel/uv_sysfs.c b/arch/x86/kernel/uv_sysfs.c
new file mode 100644
index 00000000000..67f9b9dbf80
--- /dev/null
+++ b/arch/x86/kernel/uv_sysfs.c
@@ -0,0 +1,72 @@
+/*
+ * This file supports the /sys/firmware/sgi_uv interfaces for SGI UV.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) Russ Anderson
+ */
+
+#include <linux/sysdev.h>
+#include <asm/uv/bios.h>
+
+struct kobject *sgi_uv_kobj;
+
+static ssize_t partition_id_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%ld\n", sn_partition_id);
+}
+
+static ssize_t coherence_id_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%ld\n", partition_coherence_id());
+}
+
+static struct kobj_attribute partition_id_attr =
+ __ATTR(partition_id, S_IRUGO, partition_id_show, NULL);
+
+static struct kobj_attribute coherence_id_attr =
+ __ATTR(coherence_id, S_IRUGO, coherence_id_show, NULL);
+
+
+static int __init sgi_uv_sysfs_init(void)
+{
+ unsigned long ret;
+
+ if (!sgi_uv_kobj)
+ sgi_uv_kobj = kobject_create_and_add("sgi_uv", firmware_kobj);
+ if (!sgi_uv_kobj) {
+ printk(KERN_WARNING "kobject_create_and_add sgi_uv failed \n");
+ return -EINVAL;
+ }
+
+ ret = sysfs_create_file(sgi_uv_kobj, &partition_id_attr.attr);
+ if (ret) {
+ printk(KERN_WARNING "sysfs_create_file partition_id failed \n");
+ return ret;
+ }
+
+ ret = sysfs_create_file(sgi_uv_kobj, &coherence_id_attr.attr);
+ if (ret) {
+ printk(KERN_WARNING "sysfs_create_file coherence_id failed \n");
+ return ret;
+ }
+
+ return 0;
+}
+
+device_initcall(sgi_uv_sysfs_init);
diff --git a/arch/x86/kernel/visws_quirks.c b/arch/x86/kernel/visws_quirks.c
index 61a97e616f7..0c9667f0752 100644
--- a/arch/x86/kernel/visws_quirks.c
+++ b/arch/x86/kernel/visws_quirks.c
@@ -484,10 +484,11 @@ static void disable_cobalt_irq(unsigned int irq)
static unsigned int startup_cobalt_irq(unsigned int irq)
{
unsigned long flags;
+ struct irq_desc *desc = irq_to_desc(irq);
spin_lock_irqsave(&cobalt_lock, flags);
- if ((irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS | IRQ_WAITING)))
- irq_desc[irq].status &= ~(IRQ_DISABLED | IRQ_INPROGRESS | IRQ_WAITING);
+ if ((desc->status & (IRQ_DISABLED | IRQ_INPROGRESS | IRQ_WAITING)))
+ desc->status &= ~(IRQ_DISABLED | IRQ_INPROGRESS | IRQ_WAITING);
enable_cobalt_irq(irq);
spin_unlock_irqrestore(&cobalt_lock, flags);
return 0;
@@ -506,9 +507,10 @@ static void ack_cobalt_irq(unsigned int irq)
static void end_cobalt_irq(unsigned int irq)
{
unsigned long flags;
+ struct irq_desc *desc = irq_to_desc(irq);
spin_lock_irqsave(&cobalt_lock, flags);
- if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
+ if (!(desc->status & (IRQ_DISABLED | IRQ_INPROGRESS)))
enable_cobalt_irq(irq);
spin_unlock_irqrestore(&cobalt_lock, flags);
}
@@ -626,12 +628,12 @@ static irqreturn_t piix4_master_intr(int irq, void *dev_id)
spin_unlock_irqrestore(&i8259A_lock, flags);
- desc = irq_desc + realirq;
+ desc = irq_to_desc(realirq);
/*
* handle this 'virtual interrupt' as a Cobalt one now.
*/
- kstat_cpu(smp_processor_id()).irqs[realirq]++;
+ kstat_incr_irqs_this_cpu(realirq, desc);
if (likely(desc->action != NULL))
handle_IRQ_event(realirq, desc->action);
@@ -662,27 +664,29 @@ void init_VISWS_APIC_irqs(void)
int i;
for (i = 0; i < CO_IRQ_APIC0 + CO_APIC_LAST + 1; i++) {
- irq_desc[i].status = IRQ_DISABLED;
- irq_desc[i].action = 0;
- irq_desc[i].depth = 1;
+ struct irq_desc *desc = irq_to_desc(i);
+
+ desc->status = IRQ_DISABLED;
+ desc->action = 0;
+ desc->depth = 1;
if (i == 0) {
- irq_desc[i].chip = &cobalt_irq_type;
+ desc->chip = &cobalt_irq_type;
}
else if (i == CO_IRQ_IDE0) {
- irq_desc[i].chip = &cobalt_irq_type;
+ desc->chip = &cobalt_irq_type;
}
else if (i == CO_IRQ_IDE1) {
- irq_desc[i].chip = &cobalt_irq_type;
+ desc->chip = &cobalt_irq_type;
}
else if (i == CO_IRQ_8259) {
- irq_desc[i].chip = &piix4_master_irq_type;
+ desc->chip = &piix4_master_irq_type;
}
else if (i < CO_IRQ_APIC0) {
- irq_desc[i].chip = &piix4_virtual_irq_type;
+ desc->chip = &piix4_virtual_irq_type;
}
else if (IS_CO_APIC(i)) {
- irq_desc[i].chip = &cobalt_irq_type;
+ desc->chip = &cobalt_irq_type;
}
}
diff --git a/arch/x86/kernel/vmiclock_32.c b/arch/x86/kernel/vmiclock_32.c
index 6953859fe28..254ee07f863 100644
--- a/arch/x86/kernel/vmiclock_32.c
+++ b/arch/x86/kernel/vmiclock_32.c
@@ -235,11 +235,14 @@ static void __devinit vmi_time_init_clockevent(void)
void __init vmi_time_init(void)
{
+ unsigned int cpu;
/* Disable PIT: BIOSes start PIT CH0 with 18.2hz peridic. */
outb_pit(0x3a, PIT_MODE); /* binary, mode 5, LSB/MSB, ch 0 */
vmi_time_init_clockevent();
setup_irq(0, &vmi_clock_action);
+ for_each_possible_cpu(cpu)
+ per_cpu(vector_irq, cpu)[vmi_get_timer_vector()] = 0;
}
#ifdef CONFIG_X86_LOCAL_APIC