2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
26 #include <linux/init.h>
27 #include <linux/acpi.h>
28 #include <linux/acpi_pmtmr.h>
29 #include <linux/efi.h>
30 #include <linux/cpumask.h>
31 #include <linux/module.h>
32 #include <linux/dmi.h>
33 #include <linux/irq.h>
34 #include <linux/bootmem.h>
35 #include <linux/ioport.h>
37 #include <asm/pgtable.h>
38 #include <asm/io_apic.h>
40 #include <asm/genapic.h>
42 #include <asm/mpspec.h>
45 #ifdef CONFIG_X86_LOCAL_APIC
46 # include <mach_apic.h>
49 static int __initdata acpi_force = 0;
52 int acpi_disabled = 0;
54 int acpi_disabled = 1;
56 EXPORT_SYMBOL(acpi_disabled);
60 #include <asm/proto.h>
61 #include <asm/genapic.h>
65 #ifdef CONFIG_X86_LOCAL_APIC
66 #include <mach_apic.h>
67 #include <mach_mpparse.h>
68 #endif /* CONFIG_X86_LOCAL_APIC */
72 #define BAD_MADT_ENTRY(entry, end) ( \
73 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
74 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
76 #define PREFIX "ACPI: "
78 int acpi_noirq; /* skip ACPI IRQ initialization */
79 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
80 EXPORT_SYMBOL(acpi_pci_disabled);
81 int acpi_ht __initdata = 1; /* enable HT */
87 u8 acpi_sci_flags __initdata;
88 int acpi_sci_override_gsi __initdata;
89 int acpi_skip_timer_override __initdata;
90 int acpi_use_timer_override __initdata;
92 #ifdef CONFIG_X86_LOCAL_APIC
93 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
96 #ifndef __HAVE_ARCH_CMPXCHG
97 #warning ACPI uses CMPXCHG, i486 and later hardware
100 /* --------------------------------------------------------------------------
101 Boot-time Configuration
102 -------------------------------------------------------------------------- */
105 * The default interrupt routing model is PIC (8259). This gets
106 * overridden if IOAPICs are enumerated (below).
108 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
112 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
113 * to map the target physical address. The problem is that set_fixmap()
114 * provides a single page, and it is possible that the page is not
116 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
117 * i.e. until the next __va_range() call.
119 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
120 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
121 * count idx down while incrementing the phys address.
123 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
125 unsigned long base, offset, mapped_size;
131 if (phys+size <= (max_low_pfn_mapped << PAGE_SHIFT))
134 offset = phys & (PAGE_SIZE - 1);
135 mapped_size = PAGE_SIZE - offset;
136 clear_fixmap(FIX_ACPI_END);
137 set_fixmap(FIX_ACPI_END, phys);
138 base = fix_to_virt(FIX_ACPI_END);
141 * Most cases can be covered by the below.
144 while (mapped_size < size) {
145 if (--idx < FIX_ACPI_BEGIN)
146 return NULL; /* cannot handle this */
149 set_fixmap(idx, phys);
150 mapped_size += PAGE_SIZE;
153 return ((unsigned char *)base + offset);
156 #ifdef CONFIG_PCI_MMCONFIG
157 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
158 struct acpi_mcfg_allocation *pci_mmcfg_config;
159 int pci_mmcfg_config_num;
161 int __init acpi_parse_mcfg(struct acpi_table_header *header)
163 struct acpi_table_mcfg *mcfg;
170 mcfg = (struct acpi_table_mcfg *)header;
172 /* how many config structures do we have */
173 pci_mmcfg_config_num = 0;
174 i = header->length - sizeof(struct acpi_table_mcfg);
175 while (i >= sizeof(struct acpi_mcfg_allocation)) {
176 ++pci_mmcfg_config_num;
177 i -= sizeof(struct acpi_mcfg_allocation);
179 if (pci_mmcfg_config_num == 0) {
180 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
184 config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
185 pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
186 if (!pci_mmcfg_config) {
187 printk(KERN_WARNING PREFIX
188 "No memory for MCFG config tables\n");
192 memcpy(pci_mmcfg_config, &mcfg[1], config_size);
193 for (i = 0; i < pci_mmcfg_config_num; ++i) {
194 if (pci_mmcfg_config[i].address > 0xFFFFFFFF) {
195 printk(KERN_ERR PREFIX
196 "MMCONFIG not in low 4GB of memory\n");
197 kfree(pci_mmcfg_config);
198 pci_mmcfg_config_num = 0;
205 #endif /* CONFIG_PCI_MMCONFIG */
207 #ifdef CONFIG_X86_LOCAL_APIC
208 static int __init acpi_parse_madt(struct acpi_table_header *table)
210 struct acpi_table_madt *madt = NULL;
215 madt = (struct acpi_table_madt *)table;
217 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
222 acpi_lapic_addr = (u64) madt->address;
224 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
228 acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
233 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
235 unsigned int ver = 0;
242 if (boot_cpu_physical_apicid != -1U)
243 ver = apic_version[boot_cpu_physical_apicid];
245 generic_processor_info(id, ver);
249 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
251 struct acpi_madt_local_apic *processor = NULL;
253 processor = (struct acpi_madt_local_apic *)header;
255 if (BAD_MADT_ENTRY(processor, end))
258 acpi_table_print_madt_entry(header);
261 * We need to register disabled CPU as well to permit
262 * counting disabled CPUs. This allows us to size
263 * cpus_possible_map more accurately, to permit
264 * to not preallocating memory for all NR_CPUS
265 * when we use CPU hotplug.
267 acpi_register_lapic(processor->id, /* APIC ID */
268 processor->lapic_flags & ACPI_MADT_ENABLED);
274 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
276 struct acpi_madt_local_sapic *processor = NULL;
278 processor = (struct acpi_madt_local_sapic *)header;
280 if (BAD_MADT_ENTRY(processor, end))
283 acpi_table_print_madt_entry(header);
285 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
286 processor->lapic_flags & ACPI_MADT_ENABLED);
292 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
293 const unsigned long end)
295 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
297 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
299 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
302 acpi_lapic_addr = lapic_addr_ovr->address;
308 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
310 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
312 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
314 if (BAD_MADT_ENTRY(lapic_nmi, end))
317 acpi_table_print_madt_entry(header);
319 if (lapic_nmi->lint != 1)
320 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
325 #endif /*CONFIG_X86_LOCAL_APIC */
327 #ifdef CONFIG_X86_IO_APIC
330 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
332 struct acpi_madt_io_apic *ioapic = NULL;
334 ioapic = (struct acpi_madt_io_apic *)header;
336 if (BAD_MADT_ENTRY(ioapic, end))
339 acpi_table_print_madt_entry(header);
341 mp_register_ioapic(ioapic->id,
342 ioapic->address, ioapic->global_irq_base);
348 * Parse Interrupt Source Override for the ACPI SCI
350 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
352 if (trigger == 0) /* compatible SCI trigger is level */
355 if (polarity == 0) /* compatible SCI polarity is low */
358 /* Command-line over-ride via acpi_sci= */
359 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
360 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
362 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
363 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
366 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
367 * If GSI is < 16, this will update its flags,
368 * else it will create a new mp_irqs[] entry.
370 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
373 * stash over-ride to indicate we've been here
374 * and for later update of acpi_gbl_FADT
376 acpi_sci_override_gsi = gsi;
381 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
382 const unsigned long end)
384 struct acpi_madt_interrupt_override *intsrc = NULL;
386 intsrc = (struct acpi_madt_interrupt_override *)header;
388 if (BAD_MADT_ENTRY(intsrc, end))
391 acpi_table_print_madt_entry(header);
393 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
394 acpi_sci_ioapic_setup(intsrc->global_irq,
395 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
396 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
400 if (acpi_skip_timer_override &&
401 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
402 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
406 mp_override_legacy_irq(intsrc->source_irq,
407 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
408 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
415 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
417 struct acpi_madt_nmi_source *nmi_src = NULL;
419 nmi_src = (struct acpi_madt_nmi_source *)header;
421 if (BAD_MADT_ENTRY(nmi_src, end))
424 acpi_table_print_madt_entry(header);
426 /* TBD: Support nimsrc entries? */
431 #endif /* CONFIG_X86_IO_APIC */
434 * acpi_pic_sci_set_trigger()
436 * use ELCR to set PIC-mode trigger type for SCI
438 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
439 * it may require Edge Trigger -- use "acpi_sci=edge"
441 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
442 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
443 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
444 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
447 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
449 unsigned int mask = 1 << irq;
450 unsigned int old, new;
452 /* Real old ELCR mask */
453 old = inb(0x4d0) | (inb(0x4d1) << 8);
456 * If we use ACPI to set PCI IRQs, then we should clear ELCR
457 * since we will set it correctly as we enable the PCI irq
460 new = acpi_noirq ? old : 0;
463 * Update SCI information in the ELCR, it isn't in the PCI
467 case 1: /* Edge - clear */
470 case 3: /* Level - set */
478 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
480 outb(new >> 8, 0x4d1);
483 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
490 * success: return IRQ number (>=0)
491 * failure: return < 0
493 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
496 unsigned int plat_gsi = gsi;
500 * Make sure all (legacy) PCI IRQs are set as level-triggered.
502 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
503 if (triggering == ACPI_LEVEL_SENSITIVE)
504 eisa_set_level_irq(gsi);
508 #ifdef CONFIG_X86_IO_APIC
509 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
510 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
513 acpi_gsi_to_irq(plat_gsi, &irq);
518 * ACPI based hotplug support for CPU
520 #ifdef CONFIG_ACPI_HOTPLUG_CPU
522 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
524 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
525 union acpi_object *obj;
526 struct acpi_madt_local_apic *lapic;
527 cpumask_t tmp_map, new_map;
531 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
534 if (!buffer.length || !buffer.pointer)
537 obj = buffer.pointer;
538 if (obj->type != ACPI_TYPE_BUFFER ||
539 obj->buffer.length < sizeof(*lapic)) {
540 kfree(buffer.pointer);
544 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
546 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
547 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
548 kfree(buffer.pointer);
554 kfree(buffer.pointer);
555 buffer.length = ACPI_ALLOCATE_BUFFER;
556 buffer.pointer = NULL;
558 tmp_map = cpu_present_map;
559 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
562 * If mp_register_lapic successfully generates a new logical cpu
563 * number, then the following will get us exactly what was mapped
565 cpus_andnot(new_map, cpu_present_map, tmp_map);
566 if (cpus_empty(new_map)) {
567 printk ("Unable to map lapic to logical cpu number\n");
571 cpu = first_cpu(new_map);
577 /* wrapper to silence section mismatch warning */
578 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
580 return _acpi_map_lsapic(handle, pcpu);
582 EXPORT_SYMBOL(acpi_map_lsapic);
584 int acpi_unmap_lsapic(int cpu)
586 per_cpu(x86_cpu_to_apicid, cpu) = -1;
587 cpu_clear(cpu, cpu_present_map);
593 EXPORT_SYMBOL(acpi_unmap_lsapic);
594 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
596 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
602 EXPORT_SYMBOL(acpi_register_ioapic);
604 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
610 EXPORT_SYMBOL(acpi_unregister_ioapic);
612 static int __init acpi_parse_sbf(struct acpi_table_header *table)
614 struct acpi_table_boot *sb;
616 sb = (struct acpi_table_boot *)table;
618 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
622 sbf_port = sb->cmos_index; /* Save CMOS port */
627 #ifdef CONFIG_HPET_TIMER
628 #include <asm/hpet.h>
630 static struct __initdata resource *hpet_res;
632 static int __init acpi_parse_hpet(struct acpi_table_header *table)
634 struct acpi_table_hpet *hpet_tbl;
636 hpet_tbl = (struct acpi_table_hpet *)table;
638 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
642 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
643 printk(KERN_WARNING PREFIX "HPET timers must be located in "
648 hpet_address = hpet_tbl->address.address;
651 * Some broken BIOSes advertise HPET at 0x0. We really do not
652 * want to allocate a resource there.
655 printk(KERN_WARNING PREFIX
656 "HPET id: %#x base: %#lx is invalid\n",
657 hpet_tbl->id, hpet_address);
662 * Some even more broken BIOSes advertise HPET at
663 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
666 if (hpet_address == 0xfed0000000000000UL) {
667 if (!hpet_force_user) {
668 printk(KERN_WARNING PREFIX "HPET id: %#x "
669 "base: 0xfed0000000000000 is bogus\n "
670 "try hpet=force on the kernel command line to "
671 "fix it up to 0xfed00000.\n", hpet_tbl->id);
675 printk(KERN_WARNING PREFIX
676 "HPET id: %#x base: 0xfed0000000000000 fixed up "
677 "to 0xfed00000.\n", hpet_tbl->id);
681 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
682 hpet_tbl->id, hpet_address);
685 * Allocate and initialize the HPET firmware resource for adding into
686 * the resource tree during the lateinit timeframe.
688 #define HPET_RESOURCE_NAME_SIZE 9
689 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
691 hpet_res->name = (void *)&hpet_res[1];
692 hpet_res->flags = IORESOURCE_MEM;
693 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
696 hpet_res->start = hpet_address;
697 hpet_res->end = hpet_address + (1 * 1024) - 1;
703 * hpet_insert_resource inserts the HPET resources used into the resource
706 static __init int hpet_insert_resource(void)
711 return insert_resource(&iomem_resource, hpet_res);
714 late_initcall(hpet_insert_resource);
717 #define acpi_parse_hpet NULL
720 static int __init acpi_parse_fadt(struct acpi_table_header *table)
723 #ifdef CONFIG_X86_PM_TIMER
724 /* detect the location of the ACPI PM Timer */
725 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
727 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
728 ACPI_ADR_SPACE_SYSTEM_IO)
731 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
733 * "X" fields are optional extensions to the original V1.0
734 * fields, so we must selectively expand V1.0 fields if the
735 * corresponding X field is zero.
738 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
741 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
744 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
750 #ifdef CONFIG_X86_LOCAL_APIC
752 * Parse LAPIC entries in MADT
753 * returns 0 on success, < 0 on error
756 static void __init acpi_register_lapic_address(unsigned long address)
758 mp_lapic_addr = address;
760 set_fixmap_nocache(FIX_APIC_BASE, address);
761 if (boot_cpu_physical_apicid == -1U) {
762 boot_cpu_physical_apicid = read_apic_id();
763 apic_version[boot_cpu_physical_apicid] =
764 GET_APIC_VERSION(apic_read(APIC_LVR));
768 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
776 * Note that the LAPIC address is obtained from the MADT (32-bit value)
777 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
781 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
782 acpi_parse_lapic_addr_ovr, 0);
784 printk(KERN_ERR PREFIX
785 "Error parsing LAPIC address override entry\n");
789 acpi_register_lapic_address(acpi_lapic_addr);
794 static int __init acpi_parse_madt_lapic_entries(void)
802 * Note that the LAPIC address is obtained from the MADT (32-bit value)
803 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
807 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
808 acpi_parse_lapic_addr_ovr, 0);
810 printk(KERN_ERR PREFIX
811 "Error parsing LAPIC address override entry\n");
815 acpi_register_lapic_address(acpi_lapic_addr);
817 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
818 acpi_parse_sapic, MAX_APICS);
821 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
822 acpi_parse_lapic, MAX_APICS);
824 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
825 /* TBD: Cleanup to allow fallback to MPS */
827 } else if (count < 0) {
828 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
829 /* TBD: Cleanup to allow fallback to MPS */
834 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
836 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
837 /* TBD: Cleanup to allow fallback to MPS */
842 #endif /* CONFIG_X86_LOCAL_APIC */
844 #ifdef CONFIG_X86_IO_APIC
847 #ifdef CONFIG_X86_ES7000
848 extern int es7000_plat;
855 DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1);
856 } mp_ioapic_routing[MAX_IO_APICS];
858 static int mp_find_ioapic(int gsi)
862 /* Find the IOAPIC that manages this GSI. */
863 for (i = 0; i < nr_ioapics; i++) {
864 if ((gsi >= mp_ioapic_routing[i].gsi_base)
865 && (gsi <= mp_ioapic_routing[i].gsi_end))
869 printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
873 static u8 __init uniq_ioapic_id(u8 id)
876 if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
877 !APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
878 return io_apic_get_unique_id(nr_ioapics, id);
883 DECLARE_BITMAP(used, 256);
884 bitmap_zero(used, 256);
885 for (i = 0; i < nr_ioapics; i++) {
886 struct mp_config_ioapic *ia = &mp_ioapics[i];
887 __set_bit(ia->mp_apicid, used);
889 if (!test_bit(id, used))
891 return find_first_zero_bit(used, 256);
895 static int bad_ioapic(unsigned long address)
897 if (nr_ioapics >= MAX_IO_APICS) {
898 printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
899 "(found %d)\n", MAX_IO_APICS, nr_ioapics);
900 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
903 printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
904 " found in table, skipping!\n");
910 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
914 if (bad_ioapic(address))
919 mp_ioapics[idx].mp_type = MP_IOAPIC;
920 mp_ioapics[idx].mp_flags = MPC_APIC_USABLE;
921 mp_ioapics[idx].mp_apicaddr = address;
923 set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
924 mp_ioapics[idx].mp_apicid = uniq_ioapic_id(id);
926 mp_ioapics[idx].mp_apicver = io_apic_get_version(idx);
928 mp_ioapics[idx].mp_apicver = 0;
931 * Build basic GSI lookup table to facilitate gsi->io_apic lookups
932 * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
934 mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mp_apicid;
935 mp_ioapic_routing[idx].gsi_base = gsi_base;
936 mp_ioapic_routing[idx].gsi_end = gsi_base +
937 io_apic_get_redir_entries(idx);
939 printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%lx, "
940 "GSI %d-%d\n", idx, mp_ioapics[idx].mp_apicid,
941 mp_ioapics[idx].mp_apicver, mp_ioapics[idx].mp_apicaddr,
942 mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end);
947 static void assign_to_mp_irq(struct mp_config_intsrc *m,
948 struct mp_config_intsrc *mp_irq)
950 memcpy(mp_irq, m, sizeof(struct mp_config_intsrc));
953 static int mp_irq_cmp(struct mp_config_intsrc *mp_irq,
954 struct mp_config_intsrc *m)
956 return memcmp(mp_irq, m, sizeof(struct mp_config_intsrc));
959 static void save_mp_irq(struct mp_config_intsrc *m)
963 for (i = 0; i < mp_irq_entries; i++) {
964 if (!mp_irq_cmp(&mp_irqs[i], m))
968 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
969 if (++mp_irq_entries == MAX_IRQ_SOURCES)
970 panic("Max # of irq sources exceeded!!\n");
973 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
977 struct mp_config_intsrc mp_irq;
980 * Convert 'gsi' to 'ioapic.pin'.
982 ioapic = mp_find_ioapic(gsi);
985 pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
988 * TBD: This check is for faulty timer entries, where the override
989 * erroneously sets the trigger to level, resulting in a HUGE
990 * increase of timer interrupts!
992 if ((bus_irq == 0) && (trigger == 3))
995 mp_irq.mp_type = MP_INTSRC;
996 mp_irq.mp_irqtype = mp_INT;
997 mp_irq.mp_irqflag = (trigger << 2) | polarity;
998 mp_irq.mp_srcbus = MP_ISA_BUS;
999 mp_irq.mp_srcbusirq = bus_irq; /* IRQ */
1000 mp_irq.mp_dstapic = mp_ioapics[ioapic].mp_apicid; /* APIC ID */
1001 mp_irq.mp_dstirq = pin; /* INTIN# */
1003 save_mp_irq(&mp_irq);
1006 void __init mp_config_acpi_legacy_irqs(void)
1010 unsigned int dstapic;
1011 struct mp_config_intsrc mp_irq;
1013 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
1015 * Fabricate the legacy ISA bus (bus #31).
1017 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1019 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1020 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1022 #ifdef CONFIG_X86_ES7000
1024 * Older generations of ES7000 have no legacy identity mappings
1026 if (es7000_plat == 1)
1031 * Locate the IOAPIC that manages the ISA IRQs (0-15).
1033 ioapic = mp_find_ioapic(0);
1036 dstapic = mp_ioapics[ioapic].mp_apicid;
1039 * Use the default configuration for the IRQs 0-15. Unless
1040 * overridden by (MADT) interrupt source override entries.
1042 for (i = 0; i < 16; i++) {
1045 for (idx = 0; idx < mp_irq_entries; idx++) {
1046 struct mp_config_intsrc *irq = mp_irqs + idx;
1048 /* Do we already have a mapping for this ISA IRQ? */
1049 if (irq->mp_srcbus == MP_ISA_BUS
1050 && irq->mp_srcbusirq == i)
1053 /* Do we already have a mapping for this IOAPIC pin */
1054 if (irq->mp_dstapic == dstapic &&
1055 irq->mp_dstirq == i)
1059 if (idx != mp_irq_entries) {
1060 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1061 continue; /* IRQ already used */
1064 mp_irq.mp_type = MP_INTSRC;
1065 mp_irq.mp_irqflag = 0; /* Conforming */
1066 mp_irq.mp_srcbus = MP_ISA_BUS;
1067 mp_irq.mp_dstapic = dstapic;
1068 mp_irq.mp_irqtype = mp_INT;
1069 mp_irq.mp_srcbusirq = i; /* Identity mapped */
1070 mp_irq.mp_dstirq = i;
1072 save_mp_irq(&mp_irq);
1076 int mp_register_gsi(u32 gsi, int triggering, int polarity)
1080 #ifdef CONFIG_X86_32
1081 #define MAX_GSI_NUM 4096
1082 #define IRQ_COMPRESSION_START 64
1084 static int pci_irq = IRQ_COMPRESSION_START;
1086 * Mapping between Global System Interrupts, which
1087 * represent all possible interrupts, and IRQs
1088 * assigned to actual devices.
1090 static int gsi_to_irq[MAX_GSI_NUM];
1093 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1097 /* Don't set up the ACPI SCI because it's already set up */
1098 if (acpi_gbl_FADT.sci_interrupt == gsi)
1101 ioapic = mp_find_ioapic(gsi);
1103 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1107 ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1109 #ifdef CONFIG_X86_32
1110 if (ioapic_renumber_irq)
1111 gsi = ioapic_renumber_irq(ioapic, gsi);
1115 * Avoid pin reprogramming. PRTs typically include entries
1116 * with redundant pin->gsi mappings (but unique PCI devices);
1117 * we only program the IOAPIC on the first.
1119 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1120 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1121 "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
1125 if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) {
1126 pr_debug(KERN_DEBUG "Pin %d-%d already programmed\n",
1127 mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
1128 #ifdef CONFIG_X86_32
1129 return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]);
1135 set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed);
1136 #ifdef CONFIG_X86_32
1138 * For GSI >= 64, use IRQ compression
1140 if ((gsi >= IRQ_COMPRESSION_START)
1141 && (triggering == ACPI_LEVEL_SENSITIVE)) {
1143 * For PCI devices assign IRQs in order, avoiding gaps
1144 * due to unused I/O APIC pins.
1147 if (gsi < MAX_GSI_NUM) {
1149 * Retain the VIA chipset work-around (gsi > 15), but
1150 * avoid a problem where the 8254 timer (IRQ0) is setup
1151 * via an override (so it's not on pin 0 of the ioapic),
1152 * and at the same time, the pin 0 interrupt is a PCI
1153 * type. The gsi > 15 test could cause these two pins
1154 * to be shared as IRQ0, and they are not shareable.
1155 * So test for this condition, and if necessary, avoid
1156 * the pin collision.
1160 * Don't assign IRQ used by ACPI SCI
1162 if (gsi == acpi_gbl_FADT.sci_interrupt)
1164 gsi_to_irq[irq] = gsi;
1166 printk(KERN_ERR "GSI %u is too high\n", gsi);
1171 io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
1172 triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
1173 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1177 int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin,
1178 u32 gsi, int triggering, int polarity)
1180 #ifdef CONFIG_X86_MPPARSE
1181 struct mp_config_intsrc mp_irq;
1187 /* print the entry should happen on mptable identically */
1188 mp_irq.mp_type = MP_INTSRC;
1189 mp_irq.mp_irqtype = mp_INT;
1190 mp_irq.mp_irqflag = (triggering == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1191 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1192 mp_irq.mp_srcbus = number;
1193 mp_irq.mp_srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1194 ioapic = mp_find_ioapic(gsi);
1195 mp_irq.mp_dstapic = mp_ioapic_routing[ioapic].apic_id;
1196 mp_irq.mp_dstirq = gsi - mp_ioapic_routing[ioapic].gsi_base;
1198 save_mp_irq(&mp_irq);
1204 * Parse IOAPIC related entries in MADT
1205 * returns 0 on success, < 0 on error
1207 static int __init acpi_parse_madt_ioapic_entries(void)
1212 * ACPI interpreter is required to complete interrupt setup,
1213 * so if it is off, don't enumerate the io-apics with ACPI.
1214 * If MPS is present, it will handle them,
1215 * otherwise the system will stay in PIC mode
1217 if (acpi_disabled || acpi_noirq) {
1225 * if "noapic" boot option, don't look for IO-APICs
1227 if (skip_ioapic_setup) {
1228 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1229 "due to 'noapic' option.\n");
1234 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1237 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1239 } else if (count < 0) {
1240 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1245 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1248 printk(KERN_ERR PREFIX
1249 "Error parsing interrupt source overrides entry\n");
1250 /* TBD: Cleanup to allow fallback to MPS */
1255 * If BIOS did not supply an INT_SRC_OVR for the SCI
1256 * pretend we got one so we can set the SCI flags.
1258 if (!acpi_sci_override_gsi)
1259 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1261 /* Fill in identity legacy mapings where no override */
1262 mp_config_acpi_legacy_irqs();
1265 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1268 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1269 /* TBD: Cleanup to allow fallback to MPS */
1276 static inline int acpi_parse_madt_ioapic_entries(void)
1280 #endif /* !CONFIG_X86_IO_APIC */
1282 static void __init early_acpi_process_madt(void)
1284 #ifdef CONFIG_X86_LOCAL_APIC
1287 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1290 * Parse MADT LAPIC entries
1292 error = early_acpi_parse_madt_lapic_addr_ovr();
1295 smp_found_config = 1;
1297 if (error == -EINVAL) {
1299 * Dell Precision Workstation 410, 610 come here.
1301 printk(KERN_ERR PREFIX
1302 "Invalid BIOS MADT, disabling ACPI\n");
1309 static void __init acpi_process_madt(void)
1311 #ifdef CONFIG_X86_LOCAL_APIC
1314 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1317 * Parse MADT LAPIC entries
1319 error = acpi_parse_madt_lapic_entries();
1323 #ifdef CONFIG_X86_GENERICARCH
1324 generic_bigsmp_probe();
1327 * Parse MADT IO-APIC entries
1329 error = acpi_parse_madt_ioapic_entries();
1331 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1332 acpi_irq_balance_set(NULL);
1335 smp_found_config = 1;
1336 #ifdef CONFIG_X86_32
1337 setup_apic_routing();
1341 if (error == -EINVAL) {
1343 * Dell Precision Workstation 410, 610 come here.
1345 printk(KERN_ERR PREFIX
1346 "Invalid BIOS MADT, disabling ACPI\n");
1354 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1357 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1364 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1367 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1374 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1377 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1381 "Warning: DMI blacklist says broken, but acpi forced\n");
1387 * Limit ACPI to CPU enumeration for HT
1389 static int __init force_acpi_ht(const struct dmi_system_id *d)
1392 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1398 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1404 * Force ignoring BIOS IRQ0 pin2 override
1406 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1408 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", d->ident);
1409 acpi_skip_timer_override = 1;
1414 * If your system is blacklisted here, but you find that acpi=force
1415 * works for you, please contact acpi-devel@sourceforge.net
1417 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1419 * Boxes that need ACPI disabled
1422 .callback = dmi_disable_acpi,
1423 .ident = "IBM Thinkpad",
1425 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1426 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1431 * Boxes that need acpi=ht
1434 .callback = force_acpi_ht,
1435 .ident = "FSC Primergy T850",
1437 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1438 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1442 .callback = force_acpi_ht,
1443 .ident = "HP VISUALIZE NT Workstation",
1445 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1446 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1450 .callback = force_acpi_ht,
1451 .ident = "Compaq Workstation W8000",
1453 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1454 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1458 .callback = force_acpi_ht,
1459 .ident = "ASUS P4B266",
1461 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1462 DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1466 .callback = force_acpi_ht,
1467 .ident = "ASUS P2B-DS",
1469 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1470 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1474 .callback = force_acpi_ht,
1475 .ident = "ASUS CUR-DLS",
1477 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1478 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1482 .callback = force_acpi_ht,
1483 .ident = "ABIT i440BX-W83977",
1485 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1486 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1490 .callback = force_acpi_ht,
1491 .ident = "IBM Bladecenter",
1493 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1494 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1498 .callback = force_acpi_ht,
1499 .ident = "IBM eServer xSeries 360",
1501 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1502 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1506 .callback = force_acpi_ht,
1507 .ident = "IBM eserver xSeries 330",
1509 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1510 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1514 .callback = force_acpi_ht,
1515 .ident = "IBM eserver xSeries 440",
1517 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1518 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1523 * Boxes that need ACPI PCI IRQ routing disabled
1526 .callback = disable_acpi_irq,
1527 .ident = "ASUS A7V",
1529 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1530 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1531 /* newer BIOS, Revision 1011, does work */
1532 DMI_MATCH(DMI_BIOS_VERSION,
1533 "ASUS A7V ACPI BIOS Revision 1007"),
1538 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1539 * for LPC bridge, which is needed for the PCI
1540 * interrupt links to work. DSDT fix is in bug 5966.
1541 * 2645, 2646 model numbers are shared with 600/600E/600X
1543 .callback = disable_acpi_irq,
1544 .ident = "IBM Thinkpad 600 Series 2645",
1546 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1547 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1551 .callback = disable_acpi_irq,
1552 .ident = "IBM Thinkpad 600 Series 2646",
1554 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1555 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1559 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1562 .callback = disable_acpi_pci,
1563 .ident = "ASUS PR-DLS",
1565 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1566 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1567 DMI_MATCH(DMI_BIOS_VERSION,
1568 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1569 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1573 .callback = disable_acpi_pci,
1574 .ident = "Acer TravelMate 36x Laptop",
1576 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1577 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1581 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1582 * which includes some code which overrides all temperature
1583 * trip points to 16C if the INTIN2 input of the I/O APIC
1584 * is enabled. This input is incorrectly designated the
1585 * ISA IRQ 0 via an interrupt source override even though
1586 * it is wired to the output of the master 8259A and INTIN0
1587 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1588 * override in that cases.
1591 .callback = dmi_ignore_irq0_timer_override,
1592 .ident = "HP NX6125 laptop",
1594 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1595 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1599 .callback = dmi_ignore_irq0_timer_override,
1600 .ident = "HP NX6325 laptop",
1602 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1603 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1610 * acpi_boot_table_init() and acpi_boot_init()
1611 * called from setup_arch(), always.
1612 * 1. checksums all tables
1613 * 2. enumerates lapics
1614 * 3. enumerates io-apics
1616 * acpi_table_init() is separate to allow reading SRAT without
1617 * other side effects.
1619 * side effects of acpi_boot_init:
1620 * acpi_lapic = 1 if LAPIC found
1621 * acpi_ioapic = 1 if IOAPIC found
1622 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1623 * if acpi_blacklisted() acpi_disabled = 1;
1624 * acpi_irq_model=...
1627 * return value: (currently ignored)
1632 int __init acpi_boot_table_init(void)
1636 dmi_check_system(acpi_dmi_table);
1639 * If acpi_disabled, bail out
1640 * One exception: acpi=ht continues far enough to enumerate LAPICs
1642 if (acpi_disabled && !acpi_ht)
1646 * Initialize the ACPI boot-time table parser.
1648 error = acpi_table_init();
1654 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1657 * blacklist may disable ACPI entirely
1659 error = acpi_blacklisted();
1662 printk(KERN_WARNING PREFIX "acpi=force override\n");
1664 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1673 int __init early_acpi_boot_init(void)
1676 * If acpi_disabled, bail out
1677 * One exception: acpi=ht continues far enough to enumerate LAPICs
1679 if (acpi_disabled && !acpi_ht)
1683 * Process the Multiple APIC Description Table (MADT), if present
1685 early_acpi_process_madt();
1690 int __init acpi_boot_init(void)
1693 * If acpi_disabled, bail out
1694 * One exception: acpi=ht continues far enough to enumerate LAPICs
1696 if (acpi_disabled && !acpi_ht)
1699 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1702 * set sci_int and PM timer address
1704 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1707 * Process the Multiple APIC Description Table (MADT), if present
1709 acpi_process_madt();
1711 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1716 static int __init parse_acpi(char *arg)
1721 /* "acpi=off" disables both ACPI table parsing and interpreter */
1722 if (strcmp(arg, "off") == 0) {
1725 /* acpi=force to over-ride black-list */
1726 else if (strcmp(arg, "force") == 0) {
1731 /* acpi=strict disables out-of-spec workarounds */
1732 else if (strcmp(arg, "strict") == 0) {
1735 /* Limit ACPI just to boot-time to enable HT */
1736 else if (strcmp(arg, "ht") == 0) {
1741 /* "acpi=noirq" disables ACPI interrupt routing */
1742 else if (strcmp(arg, "noirq") == 0) {
1745 /* Core will printk when we return error. */
1750 early_param("acpi", parse_acpi);
1752 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1753 static int __init parse_pci(char *arg)
1755 if (arg && strcmp(arg, "noacpi") == 0)
1759 early_param("pci", parse_pci);
1761 int __init acpi_mps_check(void)
1763 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1764 /* mptable code is not built-in*/
1765 if (acpi_disabled || acpi_noirq) {
1766 printk(KERN_WARNING "MPS support code is not built-in.\n"
1767 "Using acpi=off or acpi=noirq or pci=noacpi "
1768 "may have problem\n");
1775 #ifdef CONFIG_X86_IO_APIC
1776 static int __init parse_acpi_skip_timer_override(char *arg)
1778 acpi_skip_timer_override = 1;
1781 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1783 static int __init parse_acpi_use_timer_override(char *arg)
1785 acpi_use_timer_override = 1;
1788 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1789 #endif /* CONFIG_X86_IO_APIC */
1791 static int __init setup_acpi_sci(char *s)
1795 if (!strcmp(s, "edge"))
1796 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1797 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1798 else if (!strcmp(s, "level"))
1799 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1800 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1801 else if (!strcmp(s, "high"))
1802 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1803 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1804 else if (!strcmp(s, "low"))
1805 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1806 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1811 early_param("acpi_sci", setup_acpi_sci);
1813 int __acpi_acquire_global_lock(unsigned int *lock)
1815 unsigned int old, new, val;
1818 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1819 val = cmpxchg(lock, old, new);
1820 } while (unlikely (val != old));
1821 return (new < 3) ? -1 : 0;
1824 int __acpi_release_global_lock(unsigned int *lock)
1826 unsigned int old, new, val;
1830 val = cmpxchg(lock, old, new);
1831 } while (unlikely (val != old));