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>
64 #ifdef CONFIG_X86_LOCAL_APIC
65 #include <mach_apic.h>
66 #include <mach_mpparse.h>
67 #endif /* CONFIG_X86_LOCAL_APIC */
71 #define BAD_MADT_ENTRY(entry, end) ( \
72 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
73 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
75 #define PREFIX "ACPI: "
77 int acpi_noirq; /* skip ACPI IRQ initialization */
78 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
79 EXPORT_SYMBOL(acpi_pci_disabled);
80 int acpi_ht __initdata = 1; /* enable HT */
86 u8 acpi_sci_flags __initdata;
87 int acpi_sci_override_gsi __initdata;
88 int acpi_skip_timer_override __initdata;
89 int acpi_use_timer_override __initdata;
91 #ifdef CONFIG_X86_LOCAL_APIC
92 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
95 #ifndef __HAVE_ARCH_CMPXCHG
96 #warning ACPI uses CMPXCHG, i486 and later hardware
99 /* --------------------------------------------------------------------------
100 Boot-time Configuration
101 -------------------------------------------------------------------------- */
104 * The default interrupt routing model is PIC (8259). This gets
105 * overridden if IOAPICs are enumerated (below).
107 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
111 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
112 * to map the target physical address. The problem is that set_fixmap()
113 * provides a single page, and it is possible that the page is not
115 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
116 * i.e. until the next __va_range() call.
118 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
119 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
120 * count idx down while incrementing the phys address.
122 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
124 unsigned long base, offset, mapped_size;
130 if (phys+size <= (max_low_pfn_mapped << PAGE_SHIFT))
133 offset = phys & (PAGE_SIZE - 1);
134 mapped_size = PAGE_SIZE - offset;
135 clear_fixmap(FIX_ACPI_END);
136 set_fixmap(FIX_ACPI_END, phys);
137 base = fix_to_virt(FIX_ACPI_END);
140 * Most cases can be covered by the below.
143 while (mapped_size < size) {
144 if (--idx < FIX_ACPI_BEGIN)
145 return NULL; /* cannot handle this */
148 set_fixmap(idx, phys);
149 mapped_size += PAGE_SIZE;
152 return ((unsigned char *)base + offset);
155 #ifdef CONFIG_PCI_MMCONFIG
156 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
157 struct acpi_mcfg_allocation *pci_mmcfg_config;
158 int pci_mmcfg_config_num;
160 int __init acpi_parse_mcfg(struct acpi_table_header *header)
162 struct acpi_table_mcfg *mcfg;
169 mcfg = (struct acpi_table_mcfg *)header;
171 /* how many config structures do we have */
172 pci_mmcfg_config_num = 0;
173 i = header->length - sizeof(struct acpi_table_mcfg);
174 while (i >= sizeof(struct acpi_mcfg_allocation)) {
175 ++pci_mmcfg_config_num;
176 i -= sizeof(struct acpi_mcfg_allocation);
178 if (pci_mmcfg_config_num == 0) {
179 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
183 config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
184 pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
185 if (!pci_mmcfg_config) {
186 printk(KERN_WARNING PREFIX
187 "No memory for MCFG config tables\n");
191 memcpy(pci_mmcfg_config, &mcfg[1], config_size);
192 for (i = 0; i < pci_mmcfg_config_num; ++i) {
193 if (pci_mmcfg_config[i].address > 0xFFFFFFFF) {
194 printk(KERN_ERR PREFIX
195 "MMCONFIG not in low 4GB of memory\n");
196 kfree(pci_mmcfg_config);
197 pci_mmcfg_config_num = 0;
204 #endif /* CONFIG_PCI_MMCONFIG */
206 #ifdef CONFIG_X86_LOCAL_APIC
207 static int __init acpi_parse_madt(struct acpi_table_header *table)
209 struct acpi_table_madt *madt = NULL;
214 madt = (struct acpi_table_madt *)table;
216 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
221 acpi_lapic_addr = (u64) madt->address;
223 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
227 acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
232 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
234 unsigned int ver = 0;
242 if (boot_cpu_physical_apicid != -1U)
243 ver = apic_version[boot_cpu_physical_apicid];
246 generic_processor_info(id, ver);
250 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
252 struct acpi_madt_local_apic *processor = NULL;
254 processor = (struct acpi_madt_local_apic *)header;
256 if (BAD_MADT_ENTRY(processor, end))
259 acpi_table_print_madt_entry(header);
262 * We need to register disabled CPU as well to permit
263 * counting disabled CPUs. This allows us to size
264 * cpus_possible_map more accurately, to permit
265 * to not preallocating memory for all NR_CPUS
266 * when we use CPU hotplug.
268 acpi_register_lapic(processor->id, /* APIC ID */
269 processor->lapic_flags & ACPI_MADT_ENABLED);
275 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
277 struct acpi_madt_local_sapic *processor = NULL;
279 processor = (struct acpi_madt_local_sapic *)header;
281 if (BAD_MADT_ENTRY(processor, end))
284 acpi_table_print_madt_entry(header);
286 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
287 processor->lapic_flags & ACPI_MADT_ENABLED);
293 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
294 const unsigned long end)
296 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
298 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
300 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
303 acpi_lapic_addr = lapic_addr_ovr->address;
309 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
311 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
313 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
315 if (BAD_MADT_ENTRY(lapic_nmi, end))
318 acpi_table_print_madt_entry(header);
320 if (lapic_nmi->lint != 1)
321 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
326 #endif /*CONFIG_X86_LOCAL_APIC */
328 #ifdef CONFIG_X86_IO_APIC
331 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
333 struct acpi_madt_io_apic *ioapic = NULL;
335 ioapic = (struct acpi_madt_io_apic *)header;
337 if (BAD_MADT_ENTRY(ioapic, end))
340 acpi_table_print_madt_entry(header);
342 mp_register_ioapic(ioapic->id,
343 ioapic->address, ioapic->global_irq_base);
349 * Parse Interrupt Source Override for the ACPI SCI
351 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
353 if (trigger == 0) /* compatible SCI trigger is level */
356 if (polarity == 0) /* compatible SCI polarity is low */
359 /* Command-line over-ride via acpi_sci= */
360 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
361 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
363 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
364 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
367 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
368 * If GSI is < 16, this will update its flags,
369 * else it will create a new mp_irqs[] entry.
371 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
374 * stash over-ride to indicate we've been here
375 * and for later update of acpi_gbl_FADT
377 acpi_sci_override_gsi = gsi;
382 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
383 const unsigned long end)
385 struct acpi_madt_interrupt_override *intsrc = NULL;
387 intsrc = (struct acpi_madt_interrupt_override *)header;
389 if (BAD_MADT_ENTRY(intsrc, end))
392 acpi_table_print_madt_entry(header);
394 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
395 acpi_sci_ioapic_setup(intsrc->global_irq,
396 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
397 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
401 if (acpi_skip_timer_override &&
402 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
403 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
407 mp_override_legacy_irq(intsrc->source_irq,
408 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
409 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
416 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
418 struct acpi_madt_nmi_source *nmi_src = NULL;
420 nmi_src = (struct acpi_madt_nmi_source *)header;
422 if (BAD_MADT_ENTRY(nmi_src, end))
425 acpi_table_print_madt_entry(header);
427 /* TBD: Support nimsrc entries? */
432 #endif /* CONFIG_X86_IO_APIC */
435 * acpi_pic_sci_set_trigger()
437 * use ELCR to set PIC-mode trigger type for SCI
439 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
440 * it may require Edge Trigger -- use "acpi_sci=edge"
442 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
443 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
444 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
445 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
448 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
450 unsigned int mask = 1 << irq;
451 unsigned int old, new;
453 /* Real old ELCR mask */
454 old = inb(0x4d0) | (inb(0x4d1) << 8);
457 * If we use ACPI to set PCI IRQs, then we should clear ELCR
458 * since we will set it correctly as we enable the PCI irq
461 new = acpi_noirq ? old : 0;
464 * Update SCI information in the ELCR, it isn't in the PCI
468 case 1: /* Edge - clear */
471 case 3: /* Level - set */
479 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
481 outb(new >> 8, 0x4d1);
484 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
491 * success: return IRQ number (>=0)
492 * failure: return < 0
494 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
497 unsigned int plat_gsi = gsi;
501 * Make sure all (legacy) PCI IRQs are set as level-triggered.
503 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
504 if (triggering == ACPI_LEVEL_SENSITIVE)
505 eisa_set_level_irq(gsi);
509 #ifdef CONFIG_X86_IO_APIC
510 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
511 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
514 acpi_gsi_to_irq(plat_gsi, &irq);
519 * ACPI based hotplug support for CPU
521 #ifdef CONFIG_ACPI_HOTPLUG_CPU
523 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
525 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
526 union acpi_object *obj;
527 struct acpi_madt_local_apic *lapic;
528 cpumask_t tmp_map, new_map;
532 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
535 if (!buffer.length || !buffer.pointer)
538 obj = buffer.pointer;
539 if (obj->type != ACPI_TYPE_BUFFER ||
540 obj->buffer.length < sizeof(*lapic)) {
541 kfree(buffer.pointer);
545 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
547 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
548 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
549 kfree(buffer.pointer);
555 kfree(buffer.pointer);
556 buffer.length = ACPI_ALLOCATE_BUFFER;
557 buffer.pointer = NULL;
559 tmp_map = cpu_present_map;
560 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
563 * If mp_register_lapic successfully generates a new logical cpu
564 * number, then the following will get us exactly what was mapped
566 cpus_andnot(new_map, cpu_present_map, tmp_map);
567 if (cpus_empty(new_map)) {
568 printk ("Unable to map lapic to logical cpu number\n");
572 cpu = first_cpu(new_map);
578 /* wrapper to silence section mismatch warning */
579 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
581 return _acpi_map_lsapic(handle, pcpu);
583 EXPORT_SYMBOL(acpi_map_lsapic);
585 int acpi_unmap_lsapic(int cpu)
587 per_cpu(x86_cpu_to_apicid, cpu) = -1;
588 cpu_clear(cpu, cpu_present_map);
594 EXPORT_SYMBOL(acpi_unmap_lsapic);
595 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
597 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
603 EXPORT_SYMBOL(acpi_register_ioapic);
605 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
611 EXPORT_SYMBOL(acpi_unregister_ioapic);
613 static int __init acpi_parse_sbf(struct acpi_table_header *table)
615 struct acpi_table_boot *sb;
617 sb = (struct acpi_table_boot *)table;
619 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
623 sbf_port = sb->cmos_index; /* Save CMOS port */
628 #ifdef CONFIG_HPET_TIMER
629 #include <asm/hpet.h>
631 static struct __initdata resource *hpet_res;
633 static int __init acpi_parse_hpet(struct acpi_table_header *table)
635 struct acpi_table_hpet *hpet_tbl;
637 hpet_tbl = (struct acpi_table_hpet *)table;
639 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
643 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
644 printk(KERN_WARNING PREFIX "HPET timers must be located in "
649 hpet_address = hpet_tbl->address.address;
652 * Some broken BIOSes advertise HPET at 0x0. We really do not
653 * want to allocate a resource there.
656 printk(KERN_WARNING PREFIX
657 "HPET id: %#x base: %#lx is invalid\n",
658 hpet_tbl->id, hpet_address);
663 * Some even more broken BIOSes advertise HPET at
664 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
667 if (hpet_address == 0xfed0000000000000UL) {
668 if (!hpet_force_user) {
669 printk(KERN_WARNING PREFIX "HPET id: %#x "
670 "base: 0xfed0000000000000 is bogus\n "
671 "try hpet=force on the kernel command line to "
672 "fix it up to 0xfed00000.\n", hpet_tbl->id);
676 printk(KERN_WARNING PREFIX
677 "HPET id: %#x base: 0xfed0000000000000 fixed up "
678 "to 0xfed00000.\n", hpet_tbl->id);
682 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
683 hpet_tbl->id, hpet_address);
686 * Allocate and initialize the HPET firmware resource for adding into
687 * the resource tree during the lateinit timeframe.
689 #define HPET_RESOURCE_NAME_SIZE 9
690 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
692 hpet_res->name = (void *)&hpet_res[1];
693 hpet_res->flags = IORESOURCE_MEM;
694 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
697 hpet_res->start = hpet_address;
698 hpet_res->end = hpet_address + (1 * 1024) - 1;
704 * hpet_insert_resource inserts the HPET resources used into the resource
707 static __init int hpet_insert_resource(void)
712 return insert_resource(&iomem_resource, hpet_res);
715 late_initcall(hpet_insert_resource);
718 #define acpi_parse_hpet NULL
721 static int __init acpi_parse_fadt(struct acpi_table_header *table)
724 #ifdef CONFIG_X86_PM_TIMER
725 /* detect the location of the ACPI PM Timer */
726 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
728 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
729 ACPI_ADR_SPACE_SYSTEM_IO)
732 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
734 * "X" fields are optional extensions to the original V1.0
735 * fields, so we must selectively expand V1.0 fields if the
736 * corresponding X field is zero.
739 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
742 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
745 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
751 #ifdef CONFIG_X86_LOCAL_APIC
753 * Parse LAPIC entries in MADT
754 * returns 0 on success, < 0 on error
757 static void __init acpi_register_lapic_address(unsigned long address)
759 mp_lapic_addr = address;
761 set_fixmap_nocache(FIX_APIC_BASE, address);
762 if (boot_cpu_physical_apicid == -1U) {
763 boot_cpu_physical_apicid = GET_APIC_ID(read_apic_id());
765 apic_version[boot_cpu_physical_apicid] =
766 GET_APIC_VERSION(apic_read(APIC_LVR));
771 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
779 * Note that the LAPIC address is obtained from the MADT (32-bit value)
780 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
784 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
785 acpi_parse_lapic_addr_ovr, 0);
787 printk(KERN_ERR PREFIX
788 "Error parsing LAPIC address override entry\n");
792 acpi_register_lapic_address(acpi_lapic_addr);
797 static int __init acpi_parse_madt_lapic_entries(void)
805 * Note that the LAPIC address is obtained from the MADT (32-bit value)
806 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
810 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
811 acpi_parse_lapic_addr_ovr, 0);
813 printk(KERN_ERR PREFIX
814 "Error parsing LAPIC address override entry\n");
818 acpi_register_lapic_address(acpi_lapic_addr);
820 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
821 acpi_parse_sapic, MAX_APICS);
824 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
825 acpi_parse_lapic, MAX_APICS);
827 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
828 /* TBD: Cleanup to allow fallback to MPS */
830 } else if (count < 0) {
831 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
832 /* TBD: Cleanup to allow fallback to MPS */
837 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
839 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
840 /* TBD: Cleanup to allow fallback to MPS */
845 #endif /* CONFIG_X86_LOCAL_APIC */
847 #ifdef CONFIG_X86_IO_APIC
850 #ifdef CONFIG_X86_ES7000
851 extern int es7000_plat;
858 DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1);
859 } mp_ioapic_routing[MAX_IO_APICS];
861 static int mp_find_ioapic(int gsi)
865 /* Find the IOAPIC that manages this GSI. */
866 for (i = 0; i < nr_ioapics; i++) {
867 if ((gsi >= mp_ioapic_routing[i].gsi_base)
868 && (gsi <= mp_ioapic_routing[i].gsi_end))
872 printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
876 static u8 __init uniq_ioapic_id(u8 id)
879 if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
880 !APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
881 return io_apic_get_unique_id(nr_ioapics, id);
886 DECLARE_BITMAP(used, 256);
887 bitmap_zero(used, 256);
888 for (i = 0; i < nr_ioapics; i++) {
889 struct mp_config_ioapic *ia = &mp_ioapics[i];
890 __set_bit(ia->mp_apicid, used);
892 if (!test_bit(id, used))
894 return find_first_zero_bit(used, 256);
898 static int bad_ioapic(unsigned long address)
900 if (nr_ioapics >= MAX_IO_APICS) {
901 printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
902 "(found %d)\n", MAX_IO_APICS, nr_ioapics);
903 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
906 printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
907 " found in table, skipping!\n");
913 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
917 if (bad_ioapic(address))
922 mp_ioapics[idx].mp_type = MP_IOAPIC;
923 mp_ioapics[idx].mp_flags = MPC_APIC_USABLE;
924 mp_ioapics[idx].mp_apicaddr = address;
926 set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
927 mp_ioapics[idx].mp_apicid = uniq_ioapic_id(id);
929 mp_ioapics[idx].mp_apicver = io_apic_get_version(idx);
931 mp_ioapics[idx].mp_apicver = 0;
934 * Build basic GSI lookup table to facilitate gsi->io_apic lookups
935 * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
937 mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mp_apicid;
938 mp_ioapic_routing[idx].gsi_base = gsi_base;
939 mp_ioapic_routing[idx].gsi_end = gsi_base +
940 io_apic_get_redir_entries(idx);
942 printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%lx, "
943 "GSI %d-%d\n", idx, mp_ioapics[idx].mp_apicid,
944 mp_ioapics[idx].mp_apicver, mp_ioapics[idx].mp_apicaddr,
945 mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end);
950 static void assign_to_mp_irq(struct mp_config_intsrc *m,
951 struct mp_config_intsrc *mp_irq)
953 memcpy(mp_irq, m, sizeof(struct mp_config_intsrc));
956 static int mp_irq_cmp(struct mp_config_intsrc *mp_irq,
957 struct mp_config_intsrc *m)
959 return memcmp(mp_irq, m, sizeof(struct mp_config_intsrc));
962 static void save_mp_irq(struct mp_config_intsrc *m)
966 for (i = 0; i < mp_irq_entries; i++) {
967 if (!mp_irq_cmp(&mp_irqs[i], m))
971 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
972 if (++mp_irq_entries == MAX_IRQ_SOURCES)
973 panic("Max # of irq sources exceeded!!\n");
976 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
980 struct mp_config_intsrc mp_irq;
983 * Convert 'gsi' to 'ioapic.pin'.
985 ioapic = mp_find_ioapic(gsi);
988 pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
991 * TBD: This check is for faulty timer entries, where the override
992 * erroneously sets the trigger to level, resulting in a HUGE
993 * increase of timer interrupts!
995 if ((bus_irq == 0) && (trigger == 3))
998 mp_irq.mp_type = MP_INTSRC;
999 mp_irq.mp_irqtype = mp_INT;
1000 mp_irq.mp_irqflag = (trigger << 2) | polarity;
1001 mp_irq.mp_srcbus = MP_ISA_BUS;
1002 mp_irq.mp_srcbusirq = bus_irq; /* IRQ */
1003 mp_irq.mp_dstapic = mp_ioapics[ioapic].mp_apicid; /* APIC ID */
1004 mp_irq.mp_dstirq = pin; /* INTIN# */
1006 save_mp_irq(&mp_irq);
1009 void __init mp_config_acpi_legacy_irqs(void)
1013 unsigned int dstapic;
1014 struct mp_config_intsrc mp_irq;
1016 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
1018 * Fabricate the legacy ISA bus (bus #31).
1020 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1022 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1023 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1025 #ifdef CONFIG_X86_ES7000
1027 * Older generations of ES7000 have no legacy identity mappings
1029 if (es7000_plat == 1)
1034 * Locate the IOAPIC that manages the ISA IRQs (0-15).
1036 ioapic = mp_find_ioapic(0);
1039 dstapic = mp_ioapics[ioapic].mp_apicid;
1042 * Use the default configuration for the IRQs 0-15. Unless
1043 * overridden by (MADT) interrupt source override entries.
1045 for (i = 0; i < 16; i++) {
1048 for (idx = 0; idx < mp_irq_entries; idx++) {
1049 struct mp_config_intsrc *irq = mp_irqs + idx;
1051 /* Do we already have a mapping for this ISA IRQ? */
1052 if (irq->mp_srcbus == MP_ISA_BUS
1053 && irq->mp_srcbusirq == i)
1056 /* Do we already have a mapping for this IOAPIC pin */
1057 if (irq->mp_dstapic == dstapic &&
1058 irq->mp_dstirq == i)
1062 if (idx != mp_irq_entries) {
1063 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1064 continue; /* IRQ already used */
1067 mp_irq.mp_type = MP_INTSRC;
1068 mp_irq.mp_irqflag = 0; /* Conforming */
1069 mp_irq.mp_srcbus = MP_ISA_BUS;
1070 mp_irq.mp_dstapic = dstapic;
1071 mp_irq.mp_irqtype = mp_INT;
1072 mp_irq.mp_srcbusirq = i; /* Identity mapped */
1073 mp_irq.mp_dstirq = i;
1075 save_mp_irq(&mp_irq);
1079 int mp_register_gsi(u32 gsi, int triggering, int polarity)
1083 #ifdef CONFIG_X86_32
1084 #define MAX_GSI_NUM 4096
1085 #define IRQ_COMPRESSION_START 64
1087 static int pci_irq = IRQ_COMPRESSION_START;
1089 * Mapping between Global System Interrupts, which
1090 * represent all possible interrupts, and IRQs
1091 * assigned to actual devices.
1093 static int gsi_to_irq[MAX_GSI_NUM];
1096 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1100 /* Don't set up the ACPI SCI because it's already set up */
1101 if (acpi_gbl_FADT.sci_interrupt == gsi)
1104 ioapic = mp_find_ioapic(gsi);
1106 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1110 ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1112 #ifdef CONFIG_X86_32
1113 if (ioapic_renumber_irq)
1114 gsi = ioapic_renumber_irq(ioapic, gsi);
1118 * Avoid pin reprogramming. PRTs typically include entries
1119 * with redundant pin->gsi mappings (but unique PCI devices);
1120 * we only program the IOAPIC on the first.
1122 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1123 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1124 "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
1128 if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) {
1129 pr_debug(KERN_DEBUG "Pin %d-%d already programmed\n",
1130 mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
1131 #ifdef CONFIG_X86_32
1132 return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]);
1138 set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed);
1139 #ifdef CONFIG_X86_32
1141 * For GSI >= 64, use IRQ compression
1143 if ((gsi >= IRQ_COMPRESSION_START)
1144 && (triggering == ACPI_LEVEL_SENSITIVE)) {
1146 * For PCI devices assign IRQs in order, avoiding gaps
1147 * due to unused I/O APIC pins.
1150 if (gsi < MAX_GSI_NUM) {
1152 * Retain the VIA chipset work-around (gsi > 15), but
1153 * avoid a problem where the 8254 timer (IRQ0) is setup
1154 * via an override (so it's not on pin 0 of the ioapic),
1155 * and at the same time, the pin 0 interrupt is a PCI
1156 * type. The gsi > 15 test could cause these two pins
1157 * to be shared as IRQ0, and they are not shareable.
1158 * So test for this condition, and if necessary, avoid
1159 * the pin collision.
1163 * Don't assign IRQ used by ACPI SCI
1165 if (gsi == acpi_gbl_FADT.sci_interrupt)
1167 gsi_to_irq[irq] = gsi;
1169 printk(KERN_ERR "GSI %u is too high\n", gsi);
1174 io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
1175 triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
1176 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1180 int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin,
1181 u32 gsi, int triggering, int polarity)
1183 #ifdef CONFIG_X86_MPPARSE
1184 struct mp_config_intsrc mp_irq;
1190 /* print the entry should happen on mptable identically */
1191 mp_irq.mp_type = MP_INTSRC;
1192 mp_irq.mp_irqtype = mp_INT;
1193 mp_irq.mp_irqflag = (triggering == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1194 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1195 mp_irq.mp_srcbus = number;
1196 mp_irq.mp_srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1197 ioapic = mp_find_ioapic(gsi);
1198 mp_irq.mp_dstapic = mp_ioapic_routing[ioapic].apic_id;
1199 mp_irq.mp_dstirq = gsi - mp_ioapic_routing[ioapic].gsi_base;
1201 save_mp_irq(&mp_irq);
1207 * Parse IOAPIC related entries in MADT
1208 * returns 0 on success, < 0 on error
1210 static int __init acpi_parse_madt_ioapic_entries(void)
1215 * ACPI interpreter is required to complete interrupt setup,
1216 * so if it is off, don't enumerate the io-apics with ACPI.
1217 * If MPS is present, it will handle them,
1218 * otherwise the system will stay in PIC mode
1220 if (acpi_disabled || acpi_noirq) {
1228 * if "noapic" boot option, don't look for IO-APICs
1230 if (skip_ioapic_setup) {
1231 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1232 "due to 'noapic' option.\n");
1237 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1240 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1242 } else if (count < 0) {
1243 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1248 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1251 printk(KERN_ERR PREFIX
1252 "Error parsing interrupt source overrides entry\n");
1253 /* TBD: Cleanup to allow fallback to MPS */
1258 * If BIOS did not supply an INT_SRC_OVR for the SCI
1259 * pretend we got one so we can set the SCI flags.
1261 if (!acpi_sci_override_gsi)
1262 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1264 /* Fill in identity legacy mapings where no override */
1265 mp_config_acpi_legacy_irqs();
1268 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1271 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1272 /* TBD: Cleanup to allow fallback to MPS */
1279 static inline int acpi_parse_madt_ioapic_entries(void)
1283 #endif /* !CONFIG_X86_IO_APIC */
1285 static void __init early_acpi_process_madt(void)
1287 #ifdef CONFIG_X86_LOCAL_APIC
1290 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1293 * Parse MADT LAPIC entries
1295 error = early_acpi_parse_madt_lapic_addr_ovr();
1298 smp_found_config = 1;
1300 if (error == -EINVAL) {
1302 * Dell Precision Workstation 410, 610 come here.
1304 printk(KERN_ERR PREFIX
1305 "Invalid BIOS MADT, disabling ACPI\n");
1312 static void __init acpi_process_madt(void)
1314 #ifdef CONFIG_X86_LOCAL_APIC
1317 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1320 * Parse MADT LAPIC entries
1322 error = acpi_parse_madt_lapic_entries();
1326 #ifdef CONFIG_X86_GENERICARCH
1327 generic_bigsmp_probe();
1330 * Parse MADT IO-APIC entries
1332 error = acpi_parse_madt_ioapic_entries();
1334 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1335 acpi_irq_balance_set(NULL);
1338 smp_found_config = 1;
1339 setup_apic_routing();
1342 if (error == -EINVAL) {
1344 * Dell Precision Workstation 410, 610 come here.
1346 printk(KERN_ERR PREFIX
1347 "Invalid BIOS MADT, disabling ACPI\n");
1355 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1358 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1365 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1368 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1375 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1378 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1382 "Warning: DMI blacklist says broken, but acpi forced\n");
1388 * Limit ACPI to CPU enumeration for HT
1390 static int __init force_acpi_ht(const struct dmi_system_id *d)
1393 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1399 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1405 * Force ignoring BIOS IRQ0 pin2 override
1407 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1409 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", d->ident);
1410 acpi_skip_timer_override = 1;
1415 * If your system is blacklisted here, but you find that acpi=force
1416 * works for you, please contact acpi-devel@sourceforge.net
1418 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1420 * Boxes that need ACPI disabled
1423 .callback = dmi_disable_acpi,
1424 .ident = "IBM Thinkpad",
1426 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1427 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1432 * Boxes that need acpi=ht
1435 .callback = force_acpi_ht,
1436 .ident = "FSC Primergy T850",
1438 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1439 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1443 .callback = force_acpi_ht,
1444 .ident = "HP VISUALIZE NT Workstation",
1446 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1447 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1451 .callback = force_acpi_ht,
1452 .ident = "Compaq Workstation W8000",
1454 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1455 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1459 .callback = force_acpi_ht,
1460 .ident = "ASUS P4B266",
1462 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1463 DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1467 .callback = force_acpi_ht,
1468 .ident = "ASUS P2B-DS",
1470 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1471 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1475 .callback = force_acpi_ht,
1476 .ident = "ASUS CUR-DLS",
1478 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1479 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1483 .callback = force_acpi_ht,
1484 .ident = "ABIT i440BX-W83977",
1486 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1487 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1491 .callback = force_acpi_ht,
1492 .ident = "IBM Bladecenter",
1494 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1495 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1499 .callback = force_acpi_ht,
1500 .ident = "IBM eServer xSeries 360",
1502 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1503 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1507 .callback = force_acpi_ht,
1508 .ident = "IBM eserver xSeries 330",
1510 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1511 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1515 .callback = force_acpi_ht,
1516 .ident = "IBM eserver xSeries 440",
1518 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1519 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1524 * Boxes that need ACPI PCI IRQ routing disabled
1527 .callback = disable_acpi_irq,
1528 .ident = "ASUS A7V",
1530 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1531 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1532 /* newer BIOS, Revision 1011, does work */
1533 DMI_MATCH(DMI_BIOS_VERSION,
1534 "ASUS A7V ACPI BIOS Revision 1007"),
1539 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1540 * for LPC bridge, which is needed for the PCI
1541 * interrupt links to work. DSDT fix is in bug 5966.
1542 * 2645, 2646 model numbers are shared with 600/600E/600X
1544 .callback = disable_acpi_irq,
1545 .ident = "IBM Thinkpad 600 Series 2645",
1547 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1548 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1552 .callback = disable_acpi_irq,
1553 .ident = "IBM Thinkpad 600 Series 2646",
1555 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1556 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1560 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1563 .callback = disable_acpi_pci,
1564 .ident = "ASUS PR-DLS",
1566 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1567 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1568 DMI_MATCH(DMI_BIOS_VERSION,
1569 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1570 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1574 .callback = disable_acpi_pci,
1575 .ident = "Acer TravelMate 36x Laptop",
1577 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1578 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1582 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1583 * which includes some code which overrides all temperature
1584 * trip points to 16C if the INTIN2 input of the I/O APIC
1585 * is enabled. This input is incorrectly designated the
1586 * ISA IRQ 0 via an interrupt source override even though
1587 * it is wired to the output of the master 8259A and INTIN0
1588 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1589 * override in that cases.
1592 .callback = dmi_ignore_irq0_timer_override,
1593 .ident = "HP NX6125 laptop",
1595 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1596 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1600 .callback = dmi_ignore_irq0_timer_override,
1601 .ident = "HP NX6325 laptop",
1603 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1604 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1611 * acpi_boot_table_init() and acpi_boot_init()
1612 * called from setup_arch(), always.
1613 * 1. checksums all tables
1614 * 2. enumerates lapics
1615 * 3. enumerates io-apics
1617 * acpi_table_init() is separate to allow reading SRAT without
1618 * other side effects.
1620 * side effects of acpi_boot_init:
1621 * acpi_lapic = 1 if LAPIC found
1622 * acpi_ioapic = 1 if IOAPIC found
1623 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1624 * if acpi_blacklisted() acpi_disabled = 1;
1625 * acpi_irq_model=...
1628 * return value: (currently ignored)
1633 int __init acpi_boot_table_init(void)
1637 dmi_check_system(acpi_dmi_table);
1640 * If acpi_disabled, bail out
1641 * One exception: acpi=ht continues far enough to enumerate LAPICs
1643 if (acpi_disabled && !acpi_ht)
1647 * Initialize the ACPI boot-time table parser.
1649 error = acpi_table_init();
1655 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1658 * blacklist may disable ACPI entirely
1660 error = acpi_blacklisted();
1663 printk(KERN_WARNING PREFIX "acpi=force override\n");
1665 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1674 int __init early_acpi_boot_init(void)
1677 * If acpi_disabled, bail out
1678 * One exception: acpi=ht continues far enough to enumerate LAPICs
1680 if (acpi_disabled && !acpi_ht)
1684 * Process the Multiple APIC Description Table (MADT), if present
1686 early_acpi_process_madt();
1691 int __init acpi_boot_init(void)
1694 * If acpi_disabled, bail out
1695 * One exception: acpi=ht continues far enough to enumerate LAPICs
1697 if (acpi_disabled && !acpi_ht)
1700 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1703 * set sci_int and PM timer address
1705 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1708 * Process the Multiple APIC Description Table (MADT), if present
1710 acpi_process_madt();
1712 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1717 static int __init parse_acpi(char *arg)
1722 /* "acpi=off" disables both ACPI table parsing and interpreter */
1723 if (strcmp(arg, "off") == 0) {
1726 /* acpi=force to over-ride black-list */
1727 else if (strcmp(arg, "force") == 0) {
1732 /* acpi=strict disables out-of-spec workarounds */
1733 else if (strcmp(arg, "strict") == 0) {
1736 /* Limit ACPI just to boot-time to enable HT */
1737 else if (strcmp(arg, "ht") == 0) {
1742 /* "acpi=noirq" disables ACPI interrupt routing */
1743 else if (strcmp(arg, "noirq") == 0) {
1746 /* Core will printk when we return error. */
1751 early_param("acpi", parse_acpi);
1753 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1754 static int __init parse_pci(char *arg)
1756 if (arg && strcmp(arg, "noacpi") == 0)
1760 early_param("pci", parse_pci);
1762 int __init acpi_mps_check(void)
1764 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1765 /* mptable code is not built-in*/
1766 if (acpi_disabled || acpi_noirq) {
1767 printk(KERN_WARNING "MPS support code is not built-in.\n"
1768 "Using acpi=off or acpi=noirq or pci=noacpi "
1769 "may have problem\n");
1776 #ifdef CONFIG_X86_IO_APIC
1777 static int __init parse_acpi_skip_timer_override(char *arg)
1779 acpi_skip_timer_override = 1;
1782 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1784 static int __init parse_acpi_use_timer_override(char *arg)
1786 acpi_use_timer_override = 1;
1789 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1790 #endif /* CONFIG_X86_IO_APIC */
1792 static int __init setup_acpi_sci(char *s)
1796 if (!strcmp(s, "edge"))
1797 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1798 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1799 else if (!strcmp(s, "level"))
1800 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1801 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1802 else if (!strcmp(s, "high"))
1803 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1804 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1805 else if (!strcmp(s, "low"))
1806 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1807 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1812 early_param("acpi_sci", setup_acpi_sci);
1814 int __acpi_acquire_global_lock(unsigned int *lock)
1816 unsigned int old, new, val;
1819 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1820 val = cmpxchg(lock, old, new);
1821 } while (unlikely (val != old));
1822 return (new < 3) ? -1 : 0;
1825 int __acpi_release_global_lock(unsigned int *lock)
1827 unsigned int old, new, val;
1831 val = cmpxchg(lock, old, new);
1832 } while (unlikely (val != old));