aboutsummaryrefslogtreecommitdiff
path: root/arch/x86/kernel/acpi/boot.c
diff options
context:
space:
mode:
authorThomas Gleixner <tglx@linutronix.de>2007-10-11 11:16:23 +0200
committerThomas Gleixner <tglx@linutronix.de>2007-10-11 11:16:23 +0200
commit23d6f82bd1f07886b3a974c5193baa715475dd37 (patch)
tree71712aa315b370bd30fc38708c08ab45e29d3226 /arch/x86/kernel/acpi/boot.c
parent9c2019421511a1bc646981d55528334ae46464c0 (diff)
i386: move kernel/acpi
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/acpi/boot.c')
-rw-r--r--arch/x86/kernel/acpi/boot.c1326
1 files changed, 1326 insertions, 0 deletions
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
new file mode 100644
index 00000000000..cacdd883bf2
--- /dev/null
+++ b/arch/x86/kernel/acpi/boot.c
@@ -0,0 +1,1326 @@
+/*
+ * boot.c - Architecture-Specific Low-Level ACPI Boot Support
+ *
+ * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
+ * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * 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
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <linux/init.h>
+#include <linux/acpi.h>
+#include <linux/acpi_pmtmr.h>
+#include <linux/efi.h>
+#include <linux/cpumask.h>
+#include <linux/module.h>
+#include <linux/dmi.h>
+#include <linux/irq.h>
+#include <linux/bootmem.h>
+#include <linux/ioport.h>
+
+#include <asm/pgtable.h>
+#include <asm/io_apic.h>
+#include <asm/apic.h>
+#include <asm/io.h>
+#include <asm/mpspec.h>
+
+static int __initdata acpi_force = 0;
+
+#ifdef CONFIG_ACPI
+int acpi_disabled = 0;
+#else
+int acpi_disabled = 1;
+#endif
+EXPORT_SYMBOL(acpi_disabled);
+
+#ifdef CONFIG_X86_64
+
+#include <asm/proto.h>
+
+static inline int acpi_madt_oem_check(char *oem_id, char *oem_table_id) { return 0; }
+
+
+#else /* X86 */
+
+#ifdef CONFIG_X86_LOCAL_APIC
+#include <mach_apic.h>
+#include <mach_mpparse.h>
+#endif /* CONFIG_X86_LOCAL_APIC */
+
+#endif /* X86 */
+
+#define BAD_MADT_ENTRY(entry, end) ( \
+ (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
+ ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
+
+#define PREFIX "ACPI: "
+
+int acpi_noirq; /* skip ACPI IRQ initialization */
+int acpi_pci_disabled __initdata; /* skip ACPI PCI scan and IRQ initialization */
+int acpi_ht __initdata = 1; /* enable HT */
+
+int acpi_lapic;
+int acpi_ioapic;
+int acpi_strict;
+EXPORT_SYMBOL(acpi_strict);
+
+u8 acpi_sci_flags __initdata;
+int acpi_sci_override_gsi __initdata;
+int acpi_skip_timer_override __initdata;
+int acpi_use_timer_override __initdata;
+
+#ifdef CONFIG_X86_LOCAL_APIC
+static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
+#endif
+
+#ifndef __HAVE_ARCH_CMPXCHG
+#warning ACPI uses CMPXCHG, i486 and later hardware
+#endif
+
+/* --------------------------------------------------------------------------
+ Boot-time Configuration
+ -------------------------------------------------------------------------- */
+
+/*
+ * The default interrupt routing model is PIC (8259). This gets
+ * overriden if IOAPICs are enumerated (below).
+ */
+enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
+
+#ifdef CONFIG_X86_64
+
+/* rely on all ACPI tables being in the direct mapping */
+char *__acpi_map_table(unsigned long phys_addr, unsigned long size)
+{
+ if (!phys_addr || !size)
+ return NULL;
+
+ if (phys_addr+size <= (end_pfn_map << PAGE_SHIFT) + PAGE_SIZE)
+ return __va(phys_addr);
+
+ return NULL;
+}
+
+#else
+
+/*
+ * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
+ * to map the target physical address. The problem is that set_fixmap()
+ * provides a single page, and it is possible that the page is not
+ * sufficient.
+ * By using this area, we can map up to MAX_IO_APICS pages temporarily,
+ * i.e. until the next __va_range() call.
+ *
+ * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
+ * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
+ * count idx down while incrementing the phys address.
+ */
+char *__acpi_map_table(unsigned long phys, unsigned long size)
+{
+ unsigned long base, offset, mapped_size;
+ int idx;
+
+ if (phys + size < 8 * 1024 * 1024)
+ return __va(phys);
+
+ offset = phys & (PAGE_SIZE - 1);
+ mapped_size = PAGE_SIZE - offset;
+ set_fixmap(FIX_ACPI_END, phys);
+ base = fix_to_virt(FIX_ACPI_END);
+
+ /*
+ * Most cases can be covered by the below.
+ */
+ idx = FIX_ACPI_END;
+ while (mapped_size < size) {
+ if (--idx < FIX_ACPI_BEGIN)
+ return NULL; /* cannot handle this */
+ phys += PAGE_SIZE;
+ set_fixmap(idx, phys);
+ mapped_size += PAGE_SIZE;
+ }
+
+ return ((unsigned char *)base + offset);
+}
+#endif
+
+#ifdef CONFIG_PCI_MMCONFIG
+/* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
+struct acpi_mcfg_allocation *pci_mmcfg_config;
+int pci_mmcfg_config_num;
+
+int __init acpi_parse_mcfg(struct acpi_table_header *header)
+{
+ struct acpi_table_mcfg *mcfg;
+ unsigned long i;
+ int config_size;
+
+ if (!header)
+ return -EINVAL;
+
+ mcfg = (struct acpi_table_mcfg *)header;
+
+ /* how many config structures do we have */
+ pci_mmcfg_config_num = 0;
+ i = header->length - sizeof(struct acpi_table_mcfg);
+ while (i >= sizeof(struct acpi_mcfg_allocation)) {
+ ++pci_mmcfg_config_num;
+ i -= sizeof(struct acpi_mcfg_allocation);
+ };
+ if (pci_mmcfg_config_num == 0) {
+ printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
+ return -ENODEV;
+ }
+
+ config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
+ pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
+ if (!pci_mmcfg_config) {
+ printk(KERN_WARNING PREFIX
+ "No memory for MCFG config tables\n");
+ return -ENOMEM;
+ }
+
+ memcpy(pci_mmcfg_config, &mcfg[1], config_size);
+ for (i = 0; i < pci_mmcfg_config_num; ++i) {
+ if (pci_mmcfg_config[i].address > 0xFFFFFFFF) {
+ printk(KERN_ERR PREFIX
+ "MMCONFIG not in low 4GB of memory\n");
+ kfree(pci_mmcfg_config);
+ pci_mmcfg_config_num = 0;
+ return -ENODEV;
+ }
+ }
+
+ return 0;
+}
+#endif /* CONFIG_PCI_MMCONFIG */
+
+#ifdef CONFIG_X86_LOCAL_APIC
+static int __init acpi_parse_madt(struct acpi_table_header *table)
+{
+ struct acpi_table_madt *madt = NULL;
+
+ if (!cpu_has_apic)
+ return -EINVAL;
+
+ madt = (struct acpi_table_madt *)table;
+ if (!madt) {
+ printk(KERN_WARNING PREFIX "Unable to map MADT\n");
+ return -ENODEV;
+ }
+
+ if (madt->address) {
+ acpi_lapic_addr = (u64) madt->address;
+
+ printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
+ madt->address);
+ }
+
+ acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
+
+ return 0;
+}
+
+static int __init
+acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
+{
+ struct acpi_madt_local_apic *processor = NULL;
+
+ processor = (struct acpi_madt_local_apic *)header;
+
+ if (BAD_MADT_ENTRY(processor, end))
+ return -EINVAL;
+
+ acpi_table_print_madt_entry(header);
+
+ /*
+ * We need to register disabled CPU as well to permit
+ * counting disabled CPUs. This allows us to size
+ * cpus_possible_map more accurately, to permit
+ * to not preallocating memory for all NR_CPUS
+ * when we use CPU hotplug.
+ */
+ mp_register_lapic(processor->id, /* APIC ID */
+ processor->lapic_flags & ACPI_MADT_ENABLED); /* Enabled? */
+
+ return 0;
+}
+
+static int __init
+acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
+ const unsigned long end)
+{
+ struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
+
+ lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
+
+ if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
+ return -EINVAL;
+
+ acpi_lapic_addr = lapic_addr_ovr->address;
+
+ return 0;
+}
+
+static int __init
+acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
+{
+ struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
+
+ lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
+
+ if (BAD_MADT_ENTRY(lapic_nmi, end))
+ return -EINVAL;
+
+ acpi_table_print_madt_entry(header);
+
+ if (lapic_nmi->lint != 1)
+ printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
+
+ return 0;
+}
+
+#endif /*CONFIG_X86_LOCAL_APIC */
+
+#ifdef CONFIG_X86_IO_APIC
+
+static int __init
+acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
+{
+ struct acpi_madt_io_apic *ioapic = NULL;
+
+ ioapic = (struct acpi_madt_io_apic *)header;
+
+ if (BAD_MADT_ENTRY(ioapic, end))
+ return -EINVAL;
+
+ acpi_table_print_madt_entry(header);
+
+ mp_register_ioapic(ioapic->id,
+ ioapic->address, ioapic->global_irq_base);
+
+ return 0;
+}
+
+/*
+ * Parse Interrupt Source Override for the ACPI SCI
+ */
+static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
+{
+ if (trigger == 0) /* compatible SCI trigger is level */
+ trigger = 3;
+
+ if (polarity == 0) /* compatible SCI polarity is low */
+ polarity = 3;
+
+ /* Command-line over-ride via acpi_sci= */
+ if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
+ trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
+
+ if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
+ polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
+
+ /*
+ * mp_config_acpi_legacy_irqs() already setup IRQs < 16
+ * If GSI is < 16, this will update its flags,
+ * else it will create a new mp_irqs[] entry.
+ */
+ mp_override_legacy_irq(gsi, polarity, trigger, gsi);
+
+ /*
+ * stash over-ride to indicate we've been here
+ * and for later update of acpi_gbl_FADT
+ */
+ acpi_sci_override_gsi = gsi;
+ return;
+}
+
+static int __init
+acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
+ const unsigned long end)
+{
+ struct acpi_madt_interrupt_override *intsrc = NULL;
+
+ intsrc = (struct acpi_madt_interrupt_override *)header;
+
+ if (BAD_MADT_ENTRY(intsrc, end))
+ return -EINVAL;
+
+ acpi_table_print_madt_entry(header);
+
+ if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
+ acpi_sci_ioapic_setup(intsrc->global_irq,
+ intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
+ (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
+ return 0;
+ }
+
+ if (acpi_skip_timer_override &&
+ intsrc->source_irq == 0 && intsrc->global_irq == 2) {
+ printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
+ return 0;
+ }
+
+ mp_override_legacy_irq(intsrc->source_irq,
+ intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
+ (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
+ intsrc->global_irq);
+
+ return 0;
+}
+
+static int __init
+acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
+{
+ struct acpi_madt_nmi_source *nmi_src = NULL;
+
+ nmi_src = (struct acpi_madt_nmi_source *)header;
+
+ if (BAD_MADT_ENTRY(nmi_src, end))
+ return -EINVAL;
+
+ acpi_table_print_madt_entry(header);
+
+ /* TBD: Support nimsrc entries? */
+
+ return 0;
+}
+
+#endif /* CONFIG_X86_IO_APIC */
+
+/*
+ * acpi_pic_sci_set_trigger()
+ *
+ * use ELCR to set PIC-mode trigger type for SCI
+ *
+ * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
+ * it may require Edge Trigger -- use "acpi_sci=edge"
+ *
+ * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
+ * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
+ * ECLR1 is IRQ's 0-7 (IRQ 0, 1, 2 must be 0)
+ * ECLR2 is IRQ's 8-15 (IRQ 8, 13 must be 0)
+ */
+
+void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
+{
+ unsigned int mask = 1 << irq;
+ unsigned int old, new;
+
+ /* Real old ELCR mask */
+ old = inb(0x4d0) | (inb(0x4d1) << 8);
+
+ /*
+ * If we use ACPI to set PCI irq's, then we should clear ELCR
+ * since we will set it correctly as we enable the PCI irq
+ * routing.
+ */
+ new = acpi_noirq ? old : 0;
+
+ /*
+ * Update SCI information in the ELCR, it isn't in the PCI
+ * routing tables..
+ */
+ switch (trigger) {
+ case 1: /* Edge - clear */
+ new &= ~mask;
+ break;
+ case 3: /* Level - set */
+ new |= mask;
+ break;
+ }
+
+ if (old == new)
+ return;
+
+ printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
+ outb(new, 0x4d0);
+ outb(new >> 8, 0x4d1);
+}
+
+int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
+{
+ *irq = gsi;
+ return 0;
+}
+
+/*
+ * success: return IRQ number (>=0)
+ * failure: return < 0
+ */
+int acpi_register_gsi(u32 gsi, int triggering, int polarity)
+{
+ unsigned int irq;
+ unsigned int plat_gsi = gsi;
+
+#ifdef CONFIG_PCI
+ /*
+ * Make sure all (legacy) PCI IRQs are set as level-triggered.
+ */
+ if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
+ extern void eisa_set_level_irq(unsigned int irq);
+
+ if (triggering == ACPI_LEVEL_SENSITIVE)
+ eisa_set_level_irq(gsi);
+ }
+#endif
+
+#ifdef CONFIG_X86_IO_APIC
+ if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
+ plat_gsi = mp_register_gsi(gsi, triggering, polarity);
+ }
+#endif
+ acpi_gsi_to_irq(plat_gsi, &irq);
+ return irq;
+}
+
+EXPORT_SYMBOL(acpi_register_gsi);
+
+/*
+ * ACPI based hotplug support for CPU
+ */
+#ifdef CONFIG_ACPI_HOTPLUG_CPU
+int acpi_map_lsapic(acpi_handle handle, int *pcpu)
+{
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+ union acpi_object *obj;
+ struct acpi_madt_local_apic *lapic;
+ cpumask_t tmp_map, new_map;
+ u8 physid;
+ int cpu;
+
+ if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
+ return -EINVAL;
+
+ if (!buffer.length || !buffer.pointer)
+ return -EINVAL;
+
+ obj = buffer.pointer;
+ if (obj->type != ACPI_TYPE_BUFFER ||
+ obj->buffer.length < sizeof(*lapic)) {
+ kfree(buffer.pointer);
+ return -EINVAL;
+ }
+
+ lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
+
+ if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
+ !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
+ kfree(buffer.pointer);
+ return -EINVAL;
+ }
+
+ physid = lapic->id;
+
+ kfree(buffer.pointer);
+ buffer.length = ACPI_ALLOCATE_BUFFER;
+ buffer.pointer = NULL;
+
+ tmp_map = cpu_present_map;
+ mp_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
+
+ /*
+ * If mp_register_lapic successfully generates a new logical cpu
+ * number, then the following will get us exactly what was mapped
+ */
+ cpus_andnot(new_map, cpu_present_map, tmp_map);
+ if (cpus_empty(new_map)) {
+ printk ("Unable to map lapic to logical cpu number\n");
+ return -EINVAL;
+ }
+
+ cpu = first_cpu(new_map);
+
+ *pcpu = cpu;
+ return 0;
+}
+
+EXPORT_SYMBOL(acpi_map_lsapic);
+
+int acpi_unmap_lsapic(int cpu)
+{
+ x86_cpu_to_apicid[cpu] = -1;
+ cpu_clear(cpu, cpu_present_map);
+ num_processors--;
+
+ return (0);
+}
+
+EXPORT_SYMBOL(acpi_unmap_lsapic);
+#endif /* CONFIG_ACPI_HOTPLUG_CPU */
+
+int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
+{
+ /* TBD */
+ return -EINVAL;
+}
+
+EXPORT_SYMBOL(acpi_register_ioapic);
+
+int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
+{
+ /* TBD */
+ return -EINVAL;
+}
+
+EXPORT_SYMBOL(acpi_unregister_ioapic);
+
+static unsigned long __init
+acpi_scan_rsdp(unsigned long start, unsigned long length)
+{
+ unsigned long offset = 0;
+ unsigned long sig_len = sizeof("RSD PTR ") - 1;
+
+ /*
+ * Scan all 16-byte boundaries of the physical memory region for the
+ * RSDP signature.
+ */
+ for (offset = 0; offset < length; offset += 16) {
+ if (strncmp((char *)(phys_to_virt(start) + offset), "RSD PTR ", sig_len))
+ continue;
+ return (start + offset);
+ }
+
+ return 0;
+}
+
+static int __init acpi_parse_sbf(struct acpi_table_header *table)
+{
+ struct acpi_table_boot *sb;
+
+ sb = (struct acpi_table_boot *)table;
+ if (!sb) {
+ printk(KERN_WARNING PREFIX "Unable to map SBF\n");
+ return -ENODEV;
+ }
+
+ sbf_port = sb->cmos_index; /* Save CMOS port */
+
+ return 0;
+}
+
+#ifdef CONFIG_HPET_TIMER
+#include <asm/hpet.h>
+
+static struct __initdata resource *hpet_res;
+
+static int __init acpi_parse_hpet(struct acpi_table_header *table)
+{
+ struct acpi_table_hpet *hpet_tbl;
+
+ hpet_tbl = (struct acpi_table_hpet *)table;
+ if (!hpet_tbl) {
+ printk(KERN_WARNING PREFIX "Unable to map HPET\n");
+ return -ENODEV;
+ }
+
+ if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
+ printk(KERN_WARNING PREFIX "HPET timers must be located in "
+ "memory.\n");
+ return -1;
+ }
+
+ hpet_address = hpet_tbl->address.address;
+ printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
+ hpet_tbl->id, hpet_address);
+
+ /*
+ * Allocate and initialize the HPET firmware resource for adding into
+ * the resource tree during the lateinit timeframe.
+ */
+#define HPET_RESOURCE_NAME_SIZE 9
+ hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
+
+ if (!hpet_res)
+ return 0;
+
+ memset(hpet_res, 0, sizeof(*hpet_res));
+ hpet_res->name = (void *)&hpet_res[1];
+ hpet_res->flags = IORESOURCE_MEM;
+ snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
+ hpet_tbl->sequence);
+
+ hpet_res->start = hpet_address;
+ hpet_res->end = hpet_address + (1 * 1024) - 1;
+
+ return 0;
+}
+
+/*
+ * hpet_insert_resource inserts the HPET resources used into the resource
+ * tree.
+ */
+static __init int hpet_insert_resource(void)
+{
+ if (!hpet_res)
+ return 1;
+
+ return insert_resource(&iomem_resource, hpet_res);
+}
+
+late_initcall(hpet_insert_resource);
+
+#else
+#define acpi_parse_hpet NULL
+#endif
+
+static int __init acpi_parse_fadt(struct acpi_table_header *table)
+{
+
+#ifdef CONFIG_X86_PM_TIMER
+ /* detect the location of the ACPI PM Timer */
+ if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
+ /* FADT rev. 2 */
+ if (acpi_gbl_FADT.xpm_timer_block.space_id !=
+ ACPI_ADR_SPACE_SYSTEM_IO)
+ return 0;
+
+ pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
+ /*
+ * "X" fields are optional extensions to the original V1.0
+ * fields, so we must selectively expand V1.0 fields if the
+ * corresponding X field is zero.
+ */
+ if (!pmtmr_ioport)
+ pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
+ } else {
+ /* FADT rev. 1 */
+ pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
+ }
+ if (pmtmr_ioport)
+ printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
+ pmtmr_ioport);
+#endif
+ return 0;
+}
+
+unsigned long __init acpi_find_rsdp(void)
+{
+ unsigned long rsdp_phys = 0;
+
+ if (efi_enabled) {
+ if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
+ return efi.acpi20;
+ else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
+ return efi.acpi;
+ }
+ /*
+ * Scan memory looking for the RSDP signature. First search EBDA (low
+ * memory) paragraphs and then search upper memory (E0000-FFFFF).
+ */
+ rsdp_phys = acpi_scan_rsdp(0, 0x400);
+ if (!rsdp_phys)
+ rsdp_phys = acpi_scan_rsdp(0xE0000, 0x20000);
+
+ return rsdp_phys;
+}
+
+#ifdef CONFIG_X86_LOCAL_APIC
+/*
+ * Parse LAPIC entries in MADT
+ * returns 0 on success, < 0 on error
+ */
+static int __init acpi_parse_madt_lapic_entries(void)
+{
+ int count;
+
+ if (!cpu_has_apic)
+ return -ENODEV;
+
+ /*
+ * Note that the LAPIC address is obtained from the MADT (32-bit value)
+ * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
+ */
+
+ count =
+ acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
+ acpi_parse_lapic_addr_ovr, 0);
+ if (count < 0) {
+ printk(KERN_ERR PREFIX
+ "Error parsing LAPIC address override entry\n");
+ return count;
+ }
+
+ mp_register_lapic_address(acpi_lapic_addr);
+
+ count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, acpi_parse_lapic,
+ MAX_APICS);
+ if (!count) {
+ printk(KERN_ERR PREFIX "No LAPIC entries present\n");
+ /* TBD: Cleanup to allow fallback to MPS */
+ return -ENODEV;
+ } else if (count < 0) {
+ printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
+ /* TBD: Cleanup to allow fallback to MPS */
+ return count;
+ }
+
+ count =
+ acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
+ if (count < 0) {
+ printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
+ /* TBD: Cleanup to allow fallback to MPS */
+ return count;
+ }
+ return 0;
+}
+#endif /* CONFIG_X86_LOCAL_APIC */
+
+#ifdef CONFIG_X86_IO_APIC
+/*
+ * Parse IOAPIC related entries in MADT
+ * returns 0 on success, < 0 on error
+ */
+static int __init acpi_parse_madt_ioapic_entries(void)
+{
+ int count;
+
+ /*
+ * ACPI interpreter is required to complete interrupt setup,
+ * so if it is off, don't enumerate the io-apics with ACPI.
+ * If MPS is present, it will handle them,
+ * otherwise the system will stay in PIC mode
+ */
+ if (acpi_disabled || acpi_noirq) {
+ return -ENODEV;
+ }
+
+ if (!cpu_has_apic)
+ return -ENODEV;
+
+ /*
+ * if "noapic" boot option, don't look for IO-APICs
+ */
+ if (skip_ioapic_setup) {
+ printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
+ "due to 'noapic' option.\n");
+ return -ENODEV;
+ }
+
+ count =
+ acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
+ MAX_IO_APICS);
+ if (!count) {
+ printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
+ return -ENODEV;
+ } else if (count < 0) {
+ printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
+ return count;
+ }
+
+ count =
+ acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
+ NR_IRQ_VECTORS);
+ if (count < 0) {
+ printk(KERN_ERR PREFIX
+ "Error parsing interrupt source overrides entry\n");
+ /* TBD: Cleanup to allow fallback to MPS */
+ return count;
+ }
+
+ /*
+ * If BIOS did not supply an INT_SRC_OVR for the SCI
+ * pretend we got one so we can set the SCI flags.
+ */
+ if (!acpi_sci_override_gsi)
+ acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
+
+ /* Fill in identity legacy mapings where no override */
+ mp_config_acpi_legacy_irqs();
+
+ count =
+ acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
+ NR_IRQ_VECTORS);
+ if (count < 0) {
+ printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
+ /* TBD: Cleanup to allow fallback to MPS */
+ return count;
+ }
+
+ return 0;
+}
+#else
+static inline int acpi_parse_madt_ioapic_entries(void)
+{
+ return -1;
+}
+#endif /* !CONFIG_X86_IO_APIC */
+
+static void __init acpi_process_madt(void)
+{
+#ifdef CONFIG_X86_LOCAL_APIC
+ int error;
+
+ if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
+
+ /*
+ * Parse MADT LAPIC entries
+ */
+ error = acpi_parse_madt_lapic_entries();
+ if (!error) {
+ acpi_lapic = 1;
+
+#ifdef CONFIG_X86_GENERICARCH
+ generic_bigsmp_probe();
+#endif
+ /*
+ * Parse MADT IO-APIC entries
+ */
+ error = acpi_parse_madt_ioapic_entries();
+ if (!error) {
+ acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
+ acpi_irq_balance_set(NULL);
+ acpi_ioapic = 1;
+
+ smp_found_config = 1;
+ setup_apic_routing();
+ }
+ }
+ if (error == -EINVAL) {
+ /*
+ * Dell Precision Workstation 410, 610 come here.
+ */
+ printk(KERN_ERR PREFIX
+ "Invalid BIOS MADT, disabling ACPI\n");
+ disable_acpi();
+ }
+ }
+#endif
+ return;
+}
+
+#ifdef __i386__
+
+static int __init disable_acpi_irq(struct dmi_system_id *d)
+{
+ if (!acpi_force) {
+ printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
+ d->ident);
+ acpi_noirq_set();
+ }
+ return 0;
+}
+
+static int __init disable_acpi_pci(struct dmi_system_id *d)
+{
+ if (!acpi_force) {
+ printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
+ d->ident);
+ acpi_disable_pci();
+ }
+ return 0;
+}
+
+static int __init dmi_disable_acpi(struct dmi_system_id *d)
+{
+ if (!acpi_force) {
+ printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
+ disable_acpi();
+ } else {
+ printk(KERN_NOTICE
+ "Warning: DMI blacklist says broken, but acpi forced\n");
+ }
+ return 0;
+}
+
+/*
+ * Limit ACPI to CPU enumeration for HT
+ */
+static int __init force_acpi_ht(struct dmi_system_id *d)
+{
+ if (!acpi_force) {
+ printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
+ d->ident);
+ disable_acpi();
+ acpi_ht = 1;
+ } else {
+ printk(KERN_NOTICE
+ "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
+ }
+ return 0;
+}
+
+/*
+ * If your system is blacklisted here, but you find that acpi=force
+ * works for you, please contact acpi-devel@sourceforge.net
+ */
+static struct dmi_system_id __initdata acpi_dmi_table[] = {
+ /*
+ * Boxes that need ACPI disabled
+ */
+ {
+ .callback = dmi_disable_acpi,
+ .ident = "IBM Thinkpad",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
+ DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
+ },
+ },
+
+ /*
+ * Boxes that need acpi=ht
+ */
+ {
+ .callback = force_acpi_ht,
+ .ident = "FSC Primergy T850",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
+ },
+ },
+ {
+ .callback = force_acpi_ht,
+ .ident = "HP VISUALIZE NT Workstation",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
+ },
+ },
+ {
+ .callback = force_acpi_ht,
+ .ident = "Compaq Workstation W8000",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
+ },
+ },
+ {
+ .callback = force_acpi_ht,
+ .ident = "ASUS P4B266",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+ DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
+ },
+ },
+ {
+ .callback = force_acpi_ht,
+ .ident = "ASUS P2B-DS",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+ DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
+ },
+ },
+ {
+ .callback = force_acpi_ht,
+ .ident = "ASUS CUR-DLS",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+ DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
+ },
+ },
+ {
+ .callback = force_acpi_ht,
+ .ident = "ABIT i440BX-W83977",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
+ DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
+ },
+ },
+ {
+ .callback = force_acpi_ht,
+ .ident = "IBM Bladecenter",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
+ DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
+ },
+ },
+ {
+ .callback = force_acpi_ht,
+ .ident = "IBM eServer xSeries 360",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
+ DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
+ },
+ },
+ {
+ .callback = force_acpi_ht,
+ .ident = "IBM eserver xSeries 330",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
+ DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
+ },
+ },
+ {
+ .callback = force_acpi_ht,
+ .ident = "IBM eserver xSeries 440",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
+ },
+ },
+
+ /*
+ * Boxes that need ACPI PCI IRQ routing disabled
+ */
+ {
+ .callback = disable_acpi_irq,
+ .ident = "ASUS A7V",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
+ DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
+ /* newer BIOS, Revision 1011, does work */
+ DMI_MATCH(DMI_BIOS_VERSION,
+ "ASUS A7V ACPI BIOS Revision 1007"),
+ },
+ },
+ {
+ /*
+ * Latest BIOS for IBM 600E (1.16) has bad pcinum
+ * for LPC bridge, which is needed for the PCI
+ * interrupt links to work. DSDT fix is in bug 5966.
+ * 2645, 2646 model numbers are shared with 600/600E/600X
+ */
+ .callback = disable_acpi_irq,
+ .ident = "IBM Thinkpad 600 Series 2645",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
+ DMI_MATCH(DMI_BOARD_NAME, "2645"),
+ },
+ },
+ {
+ .callback = disable_acpi_irq,
+ .ident = "IBM Thinkpad 600 Series 2646",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
+ DMI_MATCH(DMI_BOARD_NAME, "2646"),
+ },
+ },
+ /*
+ * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
+ */
+ { /* _BBN 0 bug */
+ .callback = disable_acpi_pci,
+ .ident = "ASUS PR-DLS",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+ DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
+ DMI_MATCH(DMI_BIOS_VERSION,
+ "ASUS PR-DLS ACPI BIOS Revision 1010"),
+ DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
+ },
+ },
+ {
+ .callback = disable_acpi_pci,
+ .ident = "Acer TravelMate 36x Laptop",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
+ },
+ },
+ {}
+};
+
+#endif /* __i386__ */
+
+/*
+ * acpi_boot_table_init() and acpi_boot_init()
+ * called from setup_arch(), always.
+ * 1. checksums all tables
+ * 2. enumerates lapics
+ * 3. enumerates io-apics
+ *
+ * acpi_table_init() is separate to allow reading SRAT without
+ * other side effects.
+ *
+ * side effects of acpi_boot_init:
+ * acpi_lapic = 1 if LAPIC found
+ * acpi_ioapic = 1 if IOAPIC found
+ * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
+ * if acpi_blacklisted() acpi_disabled = 1;
+ * acpi_irq_model=...
+ * ...
+ *
+ * return value: (currently ignored)
+ * 0: success
+ * !0: failure
+ */
+
+int __init acpi_boot_table_init(void)
+{
+ int error;
+
+#ifdef __i386__
+ dmi_check_system(acpi_dmi_table);
+#endif
+
+ /*
+ * If acpi_disabled, bail out
+ * One exception: acpi=ht continues far enough to enumerate LAPICs
+ */
+ if (acpi_disabled && !acpi_ht)
+ return 1;
+
+ /*
+ * Initialize the ACPI boot-time table parser.
+ */
+ error = acpi_table_init();
+ if (error) {
+ disable_acpi();
+ return error;
+ }
+
+ acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
+
+ /*
+ * blacklist may disable ACPI entirely
+ */
+ error = acpi_blacklisted();
+ if (error) {
+ if (acpi_force) {
+ printk(KERN_WARNING PREFIX "acpi=force override\n");
+ } else {
+ printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
+ disable_acpi();
+ return error;
+ }
+ }
+
+ return 0;
+}
+
+int __init acpi_boot_init(void)
+{
+ /*
+ * If acpi_disabled, bail out
+ * One exception: acpi=ht continues far enough to enumerate LAPICs
+ */
+ if (acpi_disabled && !acpi_ht)
+ return 1;
+
+ acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
+
+ /*
+ * set sci_int and PM timer address
+ */
+ acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
+
+ /*
+ * Process the Multiple APIC Description Table (MADT), if present
+ */
+ acpi_process_madt();
+
+ acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
+
+ return 0;
+}
+
+static int __init parse_acpi(char *arg)
+{
+ if (!arg)
+ return -EINVAL;
+
+ /* "acpi=off" disables both ACPI table parsing and interpreter */
+ if (strcmp(arg, "off") == 0) {
+ disable_acpi();
+ }
+ /* acpi=force to over-ride black-list */
+ else if (strcmp(arg, "force") == 0) {
+ acpi_force = 1;
+ acpi_ht = 1;
+ acpi_disabled = 0;
+ }
+ /* acpi=strict disables out-of-spec workarounds */
+ else if (strcmp(arg, "strict") == 0) {
+ acpi_strict = 1;
+ }
+ /* Limit ACPI just to boot-time to enable HT */
+ else if (strcmp(arg, "ht") == 0) {
+ if (!acpi_force)
+ disable_acpi();
+ acpi_ht = 1;
+ }
+ /* "acpi=noirq" disables ACPI interrupt routing */
+ else if (strcmp(arg, "noirq") == 0) {
+ acpi_noirq_set();
+ } else {
+ /* Core will printk when we return error. */
+ return -EINVAL;
+ }
+ return 0;
+}
+early_param("acpi", parse_acpi);
+
+/* FIXME: Using pci= for an ACPI parameter is a travesty. */
+static int __init parse_pci(char *arg)
+{
+ if (arg && strcmp(arg, "noacpi") == 0)
+ acpi_disable_pci();
+ return 0;
+}
+early_param("pci", parse_pci);
+
+#ifdef CONFIG_X86_IO_APIC
+static int __init parse_acpi_skip_timer_override(char *arg)
+{
+ acpi_skip_timer_override = 1;
+ return 0;
+}
+early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
+
+static int __init parse_acpi_use_timer_override(char *arg)
+{
+ acpi_use_timer_override = 1;
+ return 0;
+}
+early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
+#endif /* CONFIG_X86_IO_APIC */
+
+static int __init setup_acpi_sci(char *s)
+{
+ if (!s)
+ return -EINVAL;
+ if (!strcmp(s, "edge"))
+ acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
+ (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
+ else if (!strcmp(s, "level"))
+ acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
+ (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
+ else if (!strcmp(s, "high"))
+ acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
+ (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
+ else if (!strcmp(s, "low"))
+ acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
+ (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
+ else
+ return -EINVAL;
+ return 0;
+}
+early_param("acpi_sci", setup_acpi_sci);
+
+int __acpi_acquire_global_lock(unsigned int *lock)
+{
+ unsigned int old, new, val;
+ do {
+ old = *lock;
+ new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
+ val = cmpxchg(lock, old, new);
+ } while (unlikely (val != old));
+ return (new < 3) ? -1 : 0;
+}
+
+int __acpi_release_global_lock(unsigned int *lock)
+{
+ unsigned int old, new, val;
+ do {
+ old = *lock;
+ new = old & ~0x3;
+ val = cmpxchg(lock, old, new);
+ } while (unlikely (val != old));
+ return old & 0x1;
+}