diff options
Diffstat (limited to 'arch/x86/kernel/apic_32.c')
-rw-r--r-- | arch/x86/kernel/apic_32.c | 160 |
1 files changed, 90 insertions, 70 deletions
diff --git a/arch/x86/kernel/apic_32.c b/arch/x86/kernel/apic_32.c index 96986b46bc8..35a568ea840 100644 --- a/arch/x86/kernel/apic_32.c +++ b/arch/x86/kernel/apic_32.c @@ -43,12 +43,10 @@ #include <mach_apicdef.h> #include <mach_ipi.h> -#include "io_ports.h" - /* * Sanity check */ -#if (SPURIOUS_APIC_VECTOR & 0x0F) != 0x0F +#if ((SPURIOUS_APIC_VECTOR & 0x0F) != 0x0F) # error SPURIOUS_APIC_VECTOR definition error #endif @@ -57,7 +55,7 @@ * * -1=force-disable, +1=force-enable */ -static int enable_local_apic __initdata = 0; +static int enable_local_apic __initdata; /* Local APIC timer verification ok */ static int local_apic_timer_verify_ok; @@ -101,6 +99,8 @@ 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; + /* * Get the LAPIC version */ @@ -110,7 +110,7 @@ static inline int lapic_get_version(void) } /* - * Check, if the APIC is integrated or a seperate chip + * Check, if the APIC is integrated or a separate chip */ static inline int lapic_is_integrated(void) { @@ -135,9 +135,9 @@ void apic_wait_icr_idle(void) cpu_relax(); } -unsigned long safe_apic_wait_icr_idle(void) +u32 safe_apic_wait_icr_idle(void) { - unsigned long send_status; + u32 send_status; int timeout; timeout = 0; @@ -154,7 +154,7 @@ unsigned long safe_apic_wait_icr_idle(void) /** * enable_NMI_through_LVT0 - enable NMI through local vector table 0 */ -void enable_NMI_through_LVT0 (void * dummy) +void __cpuinit enable_NMI_through_LVT0(void) { unsigned int v = APIC_DM_NMI; @@ -379,8 +379,10 @@ void __init setup_boot_APIC_clock(void) */ if (local_apic_timer_disabled) { /* No broadcast on UP ! */ - if (num_possible_cpus() > 1) + if (num_possible_cpus() > 1) { + lapic_clockevent.mult = 1; setup_APIC_timer(); + } return; } @@ -434,7 +436,7 @@ void __init setup_boot_APIC_clock(void) "with PM Timer: %ldms instead of 100ms\n", (long)res); /* Correct the lapic counter value */ - res = (((u64) delta ) * pm_100ms); + 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); @@ -472,6 +474,19 @@ void __init setup_boot_APIC_clock(void) local_apic_timer_verify_ok = 1; + /* + * Do a sanity check on the APIC calibration result + */ + if (calibration_result < (1000000 / HZ)) { + local_irq_enable(); + printk(KERN_WARNING + "APIC frequency too slow, disabling apic timer\n"); + /* No broadcast on UP ! */ + if (num_possible_cpus() > 1) + setup_APIC_timer(); + return; + } + /* We trust the pm timer based calibration */ if (!pm_referenced) { apic_printk(APIC_VERBOSE, "... verify APIC timer\n"); @@ -563,6 +578,9 @@ static void local_apic_timer_interrupt(void) return; } + /* + * the NMI deadlock-detector uses this. + */ per_cpu(irq_stat, cpu).apic_timer_irqs++; evt->event_handler(evt); @@ -576,8 +594,7 @@ static void local_apic_timer_interrupt(void) * [ 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 fastcall smp_apic_timer_interrupt(struct pt_regs *regs) +void smp_apic_timer_interrupt(struct pt_regs *regs) { struct pt_regs *old_regs = set_irq_regs(regs); @@ -616,9 +633,14 @@ int setup_profiling_timer(unsigned int multiplier) */ void clear_local_APIC(void) { - int maxlvt = lapic_get_maxlvt(); - unsigned long v; + 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. @@ -849,7 +871,7 @@ void __init init_bsp_APIC(void) /** * setup_local_APIC - setup the local APIC */ -void __devinit setup_local_APIC(void) +void __cpuinit setup_local_APIC(void) { unsigned long oldvalue, value, maxlvt, integrated; int i, j; @@ -976,7 +998,8 @@ void __devinit setup_local_APIC(void) value |= APIC_LVT_LEVEL_TRIGGER; apic_write_around(APIC_LVT1, value); - if (integrated && !esr_disable) { /* !82489DX */ + if (integrated && !esr_disable) { + /* !82489DX */ maxlvt = lapic_get_maxlvt(); if (maxlvt > 3) /* Due to the Pentium erratum 3AP. */ apic_write(APIC_ESR, 0); @@ -1020,7 +1043,7 @@ void __devinit setup_local_APIC(void) /* * Detect and initialize APIC */ -static int __init detect_init_APIC (void) +static int __init detect_init_APIC(void) { u32 h, l, features; @@ -1077,7 +1100,7 @@ static int __init detect_init_APIC (void) printk(KERN_WARNING "Could not enable APIC!\n"); return -1; } - set_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability); + set_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC); mp_lapic_addr = APIC_DEFAULT_PHYS_BASE; /* The BIOS may have set up the APIC at some other address */ @@ -1104,8 +1127,6 @@ no_apic: */ void __init init_apic_mappings(void) { - unsigned long apic_phys; - /* * If no local APIC can be found then set up a fake all * zeroes page to simulate the local APIC and another @@ -1164,10 +1185,10 @@ fake_ioapic_page: * This initializes the IO-APIC and APIC hardware if this is * a UP kernel. */ -int __init APIC_init_uniprocessor (void) +int __init APIC_init_uniprocessor(void) { if (enable_local_apic < 0) - clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability); + clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC); if (!smp_found_config && !cpu_has_apic) return -1; @@ -1179,7 +1200,7 @@ int __init APIC_init_uniprocessor (void) APIC_INTEGRATED(apic_version[boot_cpu_physical_apicid])) { printk(KERN_ERR "BIOS bug, local APIC #%d not detected!...\n", boot_cpu_physical_apicid); - clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability); + clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC); return -1; } @@ -1210,50 +1231,6 @@ int __init APIC_init_uniprocessor (void) } /* - * APIC command line parameters - */ -static int __init parse_lapic(char *arg) -{ - enable_local_apic = 1; - return 0; -} -early_param("lapic", parse_lapic); - -static int __init parse_nolapic(char *arg) -{ - enable_local_apic = -1; - clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability); - return 0; -} -early_param("nolapic", parse_nolapic); - -static int __init parse_disable_lapic_timer(char *arg) -{ - local_apic_timer_disabled = 1; - return 0; -} -early_param("nolapic_timer", parse_disable_lapic_timer); - -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 apic_set_verbosity(char *str) -{ - if (strcmp("debug", str) == 0) - apic_verbosity = APIC_DEBUG; - else if (strcmp("verbose", str) == 0) - apic_verbosity = APIC_VERBOSE; - return 1; -} - -__setup("apic=", apic_set_verbosity); - - -/* * Local APIC interrupts */ @@ -1306,7 +1283,7 @@ 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: %02lx(%02lx)\n", smp_processor_id(), v , v1); irq_exit(); } @@ -1393,7 +1370,7 @@ void disconnect_bsp_APIC(int virt_wire_setup) 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 ); + 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_around(APIC_LVT0, value); @@ -1530,7 +1507,7 @@ static int lapic_resume(struct sys_device *dev) */ static struct sysdev_class lapic_sysclass = { - set_kset_name("lapic"), + .name = "lapic", .resume = lapic_resume, .suspend = lapic_suspend, }; @@ -1565,3 +1542,46 @@ device_initcall(init_lapic_sysfs); static void apic_pm_activate(void) { } #endif /* CONFIG_PM */ + +/* + * APIC command line parameters + */ +static int __init parse_lapic(char *arg) +{ + enable_local_apic = 1; + return 0; +} +early_param("lapic", parse_lapic); + +static int __init parse_nolapic(char *arg) +{ + enable_local_apic = -1; + clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC); + return 0; +} +early_param("nolapic", parse_nolapic); + +static int __init parse_disable_lapic_timer(char *arg) +{ + local_apic_timer_disabled = 1; + return 0; +} +early_param("nolapic_timer", parse_disable_lapic_timer); + +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 apic_set_verbosity(char *str) +{ + if (strcmp("debug", str) == 0) + apic_verbosity = APIC_DEBUG; + else if (strcmp("verbose", str) == 0) + apic_verbosity = APIC_VERBOSE; + return 1; +} +__setup("apic=", apic_set_verbosity); + |