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 static int acpi_mcfg_64bit_base_addr __initdata = FALSE;
162 static int __init acpi_mcfg_oem_check(struct acpi_table_mcfg *mcfg)
164 if (!strcmp(mcfg->header.oem_id, "SGI"))
165 acpi_mcfg_64bit_base_addr = TRUE;
170 int __init acpi_parse_mcfg(struct acpi_table_header *header)
172 struct acpi_table_mcfg *mcfg;
179 mcfg = (struct acpi_table_mcfg *)header;
181 /* how many config structures do we have */
182 pci_mmcfg_config_num = 0;
183 i = header->length - sizeof(struct acpi_table_mcfg);
184 while (i >= sizeof(struct acpi_mcfg_allocation)) {
185 ++pci_mmcfg_config_num;
186 i -= sizeof(struct acpi_mcfg_allocation);
188 if (pci_mmcfg_config_num == 0) {
189 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
193 config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
194 pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
195 if (!pci_mmcfg_config) {
196 printk(KERN_WARNING PREFIX
197 "No memory for MCFG config tables\n");
201 memcpy(pci_mmcfg_config, &mcfg[1], config_size);
203 acpi_mcfg_oem_check(mcfg);
205 for (i = 0; i < pci_mmcfg_config_num; ++i) {
206 if ((pci_mmcfg_config[i].address > 0xFFFFFFFF) &&
207 !acpi_mcfg_64bit_base_addr) {
208 printk(KERN_ERR PREFIX
209 "MMCONFIG not in low 4GB of memory\n");
210 kfree(pci_mmcfg_config);
211 pci_mmcfg_config_num = 0;
218 #endif /* CONFIG_PCI_MMCONFIG */
220 #ifdef CONFIG_X86_LOCAL_APIC
221 static int __init acpi_parse_madt(struct acpi_table_header *table)
223 struct acpi_table_madt *madt = NULL;
228 madt = (struct acpi_table_madt *)table;
230 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
235 acpi_lapic_addr = (u64) madt->address;
237 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
241 acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
246 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
248 unsigned int ver = 0;
255 if (boot_cpu_physical_apicid != -1U)
256 ver = apic_version[boot_cpu_physical_apicid];
258 generic_processor_info(id, ver);
262 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
264 struct acpi_madt_local_apic *processor = NULL;
266 processor = (struct acpi_madt_local_apic *)header;
268 if (BAD_MADT_ENTRY(processor, end))
271 acpi_table_print_madt_entry(header);
274 * We need to register disabled CPU as well to permit
275 * counting disabled CPUs. This allows us to size
276 * cpus_possible_map more accurately, to permit
277 * to not preallocating memory for all NR_CPUS
278 * when we use CPU hotplug.
280 acpi_register_lapic(processor->id, /* APIC ID */
281 processor->lapic_flags & ACPI_MADT_ENABLED);
287 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
289 struct acpi_madt_local_sapic *processor = NULL;
291 processor = (struct acpi_madt_local_sapic *)header;
293 if (BAD_MADT_ENTRY(processor, end))
296 acpi_table_print_madt_entry(header);
298 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
299 processor->lapic_flags & ACPI_MADT_ENABLED);
305 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
306 const unsigned long end)
308 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
310 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
312 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
315 acpi_lapic_addr = lapic_addr_ovr->address;
321 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
323 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
325 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
327 if (BAD_MADT_ENTRY(lapic_nmi, end))
330 acpi_table_print_madt_entry(header);
332 if (lapic_nmi->lint != 1)
333 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
338 #endif /*CONFIG_X86_LOCAL_APIC */
340 #ifdef CONFIG_X86_IO_APIC
343 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
345 struct acpi_madt_io_apic *ioapic = NULL;
347 ioapic = (struct acpi_madt_io_apic *)header;
349 if (BAD_MADT_ENTRY(ioapic, end))
352 acpi_table_print_madt_entry(header);
354 mp_register_ioapic(ioapic->id,
355 ioapic->address, ioapic->global_irq_base);
361 * Parse Interrupt Source Override for the ACPI SCI
363 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
365 if (trigger == 0) /* compatible SCI trigger is level */
368 if (polarity == 0) /* compatible SCI polarity is low */
371 /* Command-line over-ride via acpi_sci= */
372 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
373 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
375 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
376 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
379 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
380 * If GSI is < 16, this will update its flags,
381 * else it will create a new mp_irqs[] entry.
383 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
386 * stash over-ride to indicate we've been here
387 * and for later update of acpi_gbl_FADT
389 acpi_sci_override_gsi = gsi;
394 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
395 const unsigned long end)
397 struct acpi_madt_interrupt_override *intsrc = NULL;
399 intsrc = (struct acpi_madt_interrupt_override *)header;
401 if (BAD_MADT_ENTRY(intsrc, end))
404 acpi_table_print_madt_entry(header);
406 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
407 acpi_sci_ioapic_setup(intsrc->global_irq,
408 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
409 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
413 if (acpi_skip_timer_override &&
414 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
415 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
419 mp_override_legacy_irq(intsrc->source_irq,
420 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
421 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
428 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
430 struct acpi_madt_nmi_source *nmi_src = NULL;
432 nmi_src = (struct acpi_madt_nmi_source *)header;
434 if (BAD_MADT_ENTRY(nmi_src, end))
437 acpi_table_print_madt_entry(header);
439 /* TBD: Support nimsrc entries? */
444 #endif /* CONFIG_X86_IO_APIC */
447 * acpi_pic_sci_set_trigger()
449 * use ELCR to set PIC-mode trigger type for SCI
451 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
452 * it may require Edge Trigger -- use "acpi_sci=edge"
454 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
455 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
456 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
457 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
460 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
462 unsigned int mask = 1 << irq;
463 unsigned int old, new;
465 /* Real old ELCR mask */
466 old = inb(0x4d0) | (inb(0x4d1) << 8);
469 * If we use ACPI to set PCI IRQs, then we should clear ELCR
470 * since we will set it correctly as we enable the PCI irq
473 new = acpi_noirq ? old : 0;
476 * Update SCI information in the ELCR, it isn't in the PCI
480 case 1: /* Edge - clear */
483 case 3: /* Level - set */
491 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
493 outb(new >> 8, 0x4d1);
496 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
503 * success: return IRQ number (>=0)
504 * failure: return < 0
506 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
509 unsigned int plat_gsi = gsi;
513 * Make sure all (legacy) PCI IRQs are set as level-triggered.
515 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
516 if (triggering == ACPI_LEVEL_SENSITIVE)
517 eisa_set_level_irq(gsi);
521 #ifdef CONFIG_X86_IO_APIC
522 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
523 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
526 acpi_gsi_to_irq(plat_gsi, &irq);
531 * ACPI based hotplug support for CPU
533 #ifdef CONFIG_ACPI_HOTPLUG_CPU
535 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
537 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
538 union acpi_object *obj;
539 struct acpi_madt_local_apic *lapic;
540 cpumask_t tmp_map, new_map;
544 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
547 if (!buffer.length || !buffer.pointer)
550 obj = buffer.pointer;
551 if (obj->type != ACPI_TYPE_BUFFER ||
552 obj->buffer.length < sizeof(*lapic)) {
553 kfree(buffer.pointer);
557 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
559 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
560 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
561 kfree(buffer.pointer);
567 kfree(buffer.pointer);
568 buffer.length = ACPI_ALLOCATE_BUFFER;
569 buffer.pointer = NULL;
571 tmp_map = cpu_present_map;
572 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
575 * If mp_register_lapic successfully generates a new logical cpu
576 * number, then the following will get us exactly what was mapped
578 cpus_andnot(new_map, cpu_present_map, tmp_map);
579 if (cpus_empty(new_map)) {
580 printk ("Unable to map lapic to logical cpu number\n");
584 cpu = first_cpu(new_map);
590 /* wrapper to silence section mismatch warning */
591 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
593 return _acpi_map_lsapic(handle, pcpu);
595 EXPORT_SYMBOL(acpi_map_lsapic);
597 int acpi_unmap_lsapic(int cpu)
599 per_cpu(x86_cpu_to_apicid, cpu) = -1;
600 cpu_clear(cpu, cpu_present_map);
606 EXPORT_SYMBOL(acpi_unmap_lsapic);
607 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
609 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
615 EXPORT_SYMBOL(acpi_register_ioapic);
617 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
623 EXPORT_SYMBOL(acpi_unregister_ioapic);
625 static int __init acpi_parse_sbf(struct acpi_table_header *table)
627 struct acpi_table_boot *sb;
629 sb = (struct acpi_table_boot *)table;
631 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
635 sbf_port = sb->cmos_index; /* Save CMOS port */
640 #ifdef CONFIG_HPET_TIMER
641 #include <asm/hpet.h>
643 static struct __initdata resource *hpet_res;
645 static int __init acpi_parse_hpet(struct acpi_table_header *table)
647 struct acpi_table_hpet *hpet_tbl;
649 hpet_tbl = (struct acpi_table_hpet *)table;
651 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
655 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
656 printk(KERN_WARNING PREFIX "HPET timers must be located in "
661 hpet_address = hpet_tbl->address.address;
664 * Some broken BIOSes advertise HPET at 0x0. We really do not
665 * want to allocate a resource there.
668 printk(KERN_WARNING PREFIX
669 "HPET id: %#x base: %#lx is invalid\n",
670 hpet_tbl->id, hpet_address);
675 * Some even more broken BIOSes advertise HPET at
676 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
679 if (hpet_address == 0xfed0000000000000UL) {
680 if (!hpet_force_user) {
681 printk(KERN_WARNING PREFIX "HPET id: %#x "
682 "base: 0xfed0000000000000 is bogus\n "
683 "try hpet=force on the kernel command line to "
684 "fix it up to 0xfed00000.\n", hpet_tbl->id);
688 printk(KERN_WARNING PREFIX
689 "HPET id: %#x base: 0xfed0000000000000 fixed up "
690 "to 0xfed00000.\n", hpet_tbl->id);
694 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
695 hpet_tbl->id, hpet_address);
698 * Allocate and initialize the HPET firmware resource for adding into
699 * the resource tree during the lateinit timeframe.
701 #define HPET_RESOURCE_NAME_SIZE 9
702 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
704 hpet_res->name = (void *)&hpet_res[1];
705 hpet_res->flags = IORESOURCE_MEM;
706 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
709 hpet_res->start = hpet_address;
710 hpet_res->end = hpet_address + (1 * 1024) - 1;
716 * hpet_insert_resource inserts the HPET resources used into the resource
719 static __init int hpet_insert_resource(void)
724 return insert_resource(&iomem_resource, hpet_res);
727 late_initcall(hpet_insert_resource);
730 #define acpi_parse_hpet NULL
733 static int __init acpi_parse_fadt(struct acpi_table_header *table)
736 #ifdef CONFIG_X86_PM_TIMER
737 /* detect the location of the ACPI PM Timer */
738 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
740 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
741 ACPI_ADR_SPACE_SYSTEM_IO)
744 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
746 * "X" fields are optional extensions to the original V1.0
747 * fields, so we must selectively expand V1.0 fields if the
748 * corresponding X field is zero.
751 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
754 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
757 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
763 #ifdef CONFIG_X86_LOCAL_APIC
765 * Parse LAPIC entries in MADT
766 * returns 0 on success, < 0 on error
769 static void __init acpi_register_lapic_address(unsigned long address)
771 mp_lapic_addr = address;
773 set_fixmap_nocache(FIX_APIC_BASE, address);
774 if (boot_cpu_physical_apicid == -1U) {
775 boot_cpu_physical_apicid = read_apic_id();
776 apic_version[boot_cpu_physical_apicid] =
777 GET_APIC_VERSION(apic_read(APIC_LVR));
781 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
789 * Note that the LAPIC address is obtained from the MADT (32-bit value)
790 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
794 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
795 acpi_parse_lapic_addr_ovr, 0);
797 printk(KERN_ERR PREFIX
798 "Error parsing LAPIC address override entry\n");
802 acpi_register_lapic_address(acpi_lapic_addr);
807 static int __init acpi_parse_madt_lapic_entries(void)
815 * Note that the LAPIC address is obtained from the MADT (32-bit value)
816 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
820 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
821 acpi_parse_lapic_addr_ovr, 0);
823 printk(KERN_ERR PREFIX
824 "Error parsing LAPIC address override entry\n");
828 acpi_register_lapic_address(acpi_lapic_addr);
830 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
831 acpi_parse_sapic, MAX_APICS);
834 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
835 acpi_parse_lapic, MAX_APICS);
837 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
838 /* TBD: Cleanup to allow fallback to MPS */
840 } else if (count < 0) {
841 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
842 /* TBD: Cleanup to allow fallback to MPS */
847 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
849 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
850 /* TBD: Cleanup to allow fallback to MPS */
855 #endif /* CONFIG_X86_LOCAL_APIC */
857 #ifdef CONFIG_X86_IO_APIC
860 #ifdef CONFIG_X86_ES7000
861 extern int es7000_plat;
868 DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1);
869 } mp_ioapic_routing[MAX_IO_APICS];
871 static int mp_find_ioapic(int gsi)
875 /* Find the IOAPIC that manages this GSI. */
876 for (i = 0; i < nr_ioapics; i++) {
877 if ((gsi >= mp_ioapic_routing[i].gsi_base)
878 && (gsi <= mp_ioapic_routing[i].gsi_end))
882 printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
886 static u8 __init uniq_ioapic_id(u8 id)
889 if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
890 !APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
891 return io_apic_get_unique_id(nr_ioapics, id);
896 DECLARE_BITMAP(used, 256);
897 bitmap_zero(used, 256);
898 for (i = 0; i < nr_ioapics; i++) {
899 struct mp_config_ioapic *ia = &mp_ioapics[i];
900 __set_bit(ia->mp_apicid, used);
902 if (!test_bit(id, used))
904 return find_first_zero_bit(used, 256);
908 static int bad_ioapic(unsigned long address)
910 if (nr_ioapics >= MAX_IO_APICS) {
911 printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
912 "(found %d)\n", MAX_IO_APICS, nr_ioapics);
913 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
916 printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
917 " found in table, skipping!\n");
923 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
927 if (bad_ioapic(address))
932 mp_ioapics[idx].mp_type = MP_IOAPIC;
933 mp_ioapics[idx].mp_flags = MPC_APIC_USABLE;
934 mp_ioapics[idx].mp_apicaddr = address;
936 set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
937 mp_ioapics[idx].mp_apicid = uniq_ioapic_id(id);
939 mp_ioapics[idx].mp_apicver = io_apic_get_version(idx);
941 mp_ioapics[idx].mp_apicver = 0;
944 * Build basic GSI lookup table to facilitate gsi->io_apic lookups
945 * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
947 mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mp_apicid;
948 mp_ioapic_routing[idx].gsi_base = gsi_base;
949 mp_ioapic_routing[idx].gsi_end = gsi_base +
950 io_apic_get_redir_entries(idx);
952 printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%lx, "
953 "GSI %d-%d\n", idx, mp_ioapics[idx].mp_apicid,
954 mp_ioapics[idx].mp_apicver, mp_ioapics[idx].mp_apicaddr,
955 mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end);
960 int get_nr_irqs_via_madt(void)
965 for (idx = 0; idx < nr_ioapics; idx++) {
966 if (mp_ioapic_routing[idx].gsi_end > nr)
967 nr = mp_ioapic_routing[idx].gsi_end;
972 /* double it for hotplug and msi and nmi */
975 /* something wrong ? */
983 static void assign_to_mp_irq(struct mp_config_intsrc *m,
984 struct mp_config_intsrc *mp_irq)
986 memcpy(mp_irq, m, sizeof(struct mp_config_intsrc));
989 static int mp_irq_cmp(struct mp_config_intsrc *mp_irq,
990 struct mp_config_intsrc *m)
992 return memcmp(mp_irq, m, sizeof(struct mp_config_intsrc));
995 static void save_mp_irq(struct mp_config_intsrc *m)
999 for (i = 0; i < mp_irq_entries; i++) {
1000 if (!mp_irq_cmp(&mp_irqs[i], m))
1004 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
1005 if (++mp_irq_entries == MAX_IRQ_SOURCES)
1006 panic("Max # of irq sources exceeded!!\n");
1009 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
1013 struct mp_config_intsrc mp_irq;
1016 * Convert 'gsi' to 'ioapic.pin'.
1018 ioapic = mp_find_ioapic(gsi);
1021 pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1024 * TBD: This check is for faulty timer entries, where the override
1025 * erroneously sets the trigger to level, resulting in a HUGE
1026 * increase of timer interrupts!
1028 if ((bus_irq == 0) && (trigger == 3))
1031 mp_irq.mp_type = MP_INTSRC;
1032 mp_irq.mp_irqtype = mp_INT;
1033 mp_irq.mp_irqflag = (trigger << 2) | polarity;
1034 mp_irq.mp_srcbus = MP_ISA_BUS;
1035 mp_irq.mp_srcbusirq = bus_irq; /* IRQ */
1036 mp_irq.mp_dstapic = mp_ioapics[ioapic].mp_apicid; /* APIC ID */
1037 mp_irq.mp_dstirq = pin; /* INTIN# */
1039 save_mp_irq(&mp_irq);
1042 void __init mp_config_acpi_legacy_irqs(void)
1046 unsigned int dstapic;
1047 struct mp_config_intsrc mp_irq;
1049 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
1051 * Fabricate the legacy ISA bus (bus #31).
1053 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1055 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1056 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1058 #ifdef CONFIG_X86_ES7000
1060 * Older generations of ES7000 have no legacy identity mappings
1062 if (es7000_plat == 1)
1067 * Locate the IOAPIC that manages the ISA IRQs (0-15).
1069 ioapic = mp_find_ioapic(0);
1072 dstapic = mp_ioapics[ioapic].mp_apicid;
1075 * Use the default configuration for the IRQs 0-15. Unless
1076 * overridden by (MADT) interrupt source override entries.
1078 for (i = 0; i < 16; i++) {
1081 for (idx = 0; idx < mp_irq_entries; idx++) {
1082 struct mp_config_intsrc *irq = mp_irqs + idx;
1084 /* Do we already have a mapping for this ISA IRQ? */
1085 if (irq->mp_srcbus == MP_ISA_BUS
1086 && irq->mp_srcbusirq == i)
1089 /* Do we already have a mapping for this IOAPIC pin */
1090 if (irq->mp_dstapic == dstapic &&
1091 irq->mp_dstirq == i)
1095 if (idx != mp_irq_entries) {
1096 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1097 continue; /* IRQ already used */
1100 mp_irq.mp_type = MP_INTSRC;
1101 mp_irq.mp_irqflag = 0; /* Conforming */
1102 mp_irq.mp_srcbus = MP_ISA_BUS;
1103 mp_irq.mp_dstapic = dstapic;
1104 mp_irq.mp_irqtype = mp_INT;
1105 mp_irq.mp_srcbusirq = i; /* Identity mapped */
1106 mp_irq.mp_dstirq = i;
1108 save_mp_irq(&mp_irq);
1112 int mp_register_gsi(u32 gsi, int triggering, int polarity)
1116 #ifdef CONFIG_X86_32
1117 #define MAX_GSI_NUM 4096
1118 #define IRQ_COMPRESSION_START 64
1120 static int pci_irq = IRQ_COMPRESSION_START;
1122 * Mapping between Global System Interrupts, which
1123 * represent all possible interrupts, and IRQs
1124 * assigned to actual devices.
1126 static int gsi_to_irq[MAX_GSI_NUM];
1129 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1133 /* Don't set up the ACPI SCI because it's already set up */
1134 if (acpi_gbl_FADT.sci_interrupt == gsi)
1137 ioapic = mp_find_ioapic(gsi);
1139 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1143 ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1145 #ifdef CONFIG_X86_32
1146 if (ioapic_renumber_irq)
1147 gsi = ioapic_renumber_irq(ioapic, gsi);
1151 * Avoid pin reprogramming. PRTs typically include entries
1152 * with redundant pin->gsi mappings (but unique PCI devices);
1153 * we only program the IOAPIC on the first.
1155 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1156 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1157 "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
1161 if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) {
1162 pr_debug(KERN_DEBUG "Pin %d-%d already programmed\n",
1163 mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
1164 #ifdef CONFIG_X86_32
1165 return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]);
1171 set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed);
1172 #ifdef CONFIG_X86_32
1174 * For GSI >= 64, use IRQ compression
1176 if ((gsi >= IRQ_COMPRESSION_START)
1177 && (triggering == ACPI_LEVEL_SENSITIVE)) {
1179 * For PCI devices assign IRQs in order, avoiding gaps
1180 * due to unused I/O APIC pins.
1183 if (gsi < MAX_GSI_NUM) {
1185 * Retain the VIA chipset work-around (gsi > 15), but
1186 * avoid a problem where the 8254 timer (IRQ0) is setup
1187 * via an override (so it's not on pin 0 of the ioapic),
1188 * and at the same time, the pin 0 interrupt is a PCI
1189 * type. The gsi > 15 test could cause these two pins
1190 * to be shared as IRQ0, and they are not shareable.
1191 * So test for this condition, and if necessary, avoid
1192 * the pin collision.
1196 * Don't assign IRQ used by ACPI SCI
1198 if (gsi == acpi_gbl_FADT.sci_interrupt)
1200 gsi_to_irq[irq] = gsi;
1202 printk(KERN_ERR "GSI %u is too high\n", gsi);
1207 io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
1208 triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
1209 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1213 int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin,
1214 u32 gsi, int triggering, int polarity)
1216 #ifdef CONFIG_X86_MPPARSE
1217 struct mp_config_intsrc mp_irq;
1223 /* print the entry should happen on mptable identically */
1224 mp_irq.mp_type = MP_INTSRC;
1225 mp_irq.mp_irqtype = mp_INT;
1226 mp_irq.mp_irqflag = (triggering == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1227 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1228 mp_irq.mp_srcbus = number;
1229 mp_irq.mp_srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1230 ioapic = mp_find_ioapic(gsi);
1231 mp_irq.mp_dstapic = mp_ioapic_routing[ioapic].apic_id;
1232 mp_irq.mp_dstirq = gsi - mp_ioapic_routing[ioapic].gsi_base;
1234 save_mp_irq(&mp_irq);
1240 * Parse IOAPIC related entries in MADT
1241 * returns 0 on success, < 0 on error
1243 static int __init acpi_parse_madt_ioapic_entries(void)
1248 * ACPI interpreter is required to complete interrupt setup,
1249 * so if it is off, don't enumerate the io-apics with ACPI.
1250 * If MPS is present, it will handle them,
1251 * otherwise the system will stay in PIC mode
1253 if (acpi_disabled || acpi_noirq) {
1261 * if "noapic" boot option, don't look for IO-APICs
1263 if (skip_ioapic_setup) {
1264 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1265 "due to 'noapic' option.\n");
1270 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1273 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1275 } else if (count < 0) {
1276 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1281 nr_irqs = get_nr_irqs_via_madt();
1284 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1287 printk(KERN_ERR PREFIX
1288 "Error parsing interrupt source overrides entry\n");
1289 /* TBD: Cleanup to allow fallback to MPS */
1294 * If BIOS did not supply an INT_SRC_OVR for the SCI
1295 * pretend we got one so we can set the SCI flags.
1297 if (!acpi_sci_override_gsi)
1298 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1300 /* Fill in identity legacy mapings where no override */
1301 mp_config_acpi_legacy_irqs();
1304 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1307 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1308 /* TBD: Cleanup to allow fallback to MPS */
1315 static inline int acpi_parse_madt_ioapic_entries(void)
1319 #endif /* !CONFIG_X86_IO_APIC */
1321 static void __init early_acpi_process_madt(void)
1323 #ifdef CONFIG_X86_LOCAL_APIC
1326 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1329 * Parse MADT LAPIC entries
1331 error = early_acpi_parse_madt_lapic_addr_ovr();
1334 smp_found_config = 1;
1336 if (error == -EINVAL) {
1338 * Dell Precision Workstation 410, 610 come here.
1340 printk(KERN_ERR PREFIX
1341 "Invalid BIOS MADT, disabling ACPI\n");
1348 static void __init acpi_process_madt(void)
1350 #ifdef CONFIG_X86_LOCAL_APIC
1353 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1356 * Parse MADT LAPIC entries
1358 error = acpi_parse_madt_lapic_entries();
1362 #ifdef CONFIG_X86_GENERICARCH
1363 generic_bigsmp_probe();
1366 * Parse MADT IO-APIC entries
1368 error = acpi_parse_madt_ioapic_entries();
1370 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1371 acpi_irq_balance_set(NULL);
1374 smp_found_config = 1;
1375 #ifdef CONFIG_X86_32
1376 setup_apic_routing();
1380 if (error == -EINVAL) {
1382 * Dell Precision Workstation 410, 610 come here.
1384 printk(KERN_ERR PREFIX
1385 "Invalid BIOS MADT, disabling ACPI\n");
1393 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1396 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1403 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1406 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1413 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1416 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1420 "Warning: DMI blacklist says broken, but acpi forced\n");
1426 * Limit ACPI to CPU enumeration for HT
1428 static int __init force_acpi_ht(const struct dmi_system_id *d)
1431 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1437 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1443 * Force ignoring BIOS IRQ0 pin2 override
1445 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1448 * The ati_ixp4x0_rev() early PCI quirk should have set
1449 * the acpi_skip_timer_override flag already:
1451 if (!acpi_skip_timer_override) {
1452 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1453 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1455 acpi_skip_timer_override = 1;
1461 * If your system is blacklisted here, but you find that acpi=force
1462 * works for you, please contact acpi-devel@sourceforge.net
1464 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1466 * Boxes that need ACPI disabled
1469 .callback = dmi_disable_acpi,
1470 .ident = "IBM Thinkpad",
1472 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1473 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1478 * Boxes that need acpi=ht
1481 .callback = force_acpi_ht,
1482 .ident = "FSC Primergy T850",
1484 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1485 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1489 .callback = force_acpi_ht,
1490 .ident = "HP VISUALIZE NT Workstation",
1492 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1493 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1497 .callback = force_acpi_ht,
1498 .ident = "Compaq Workstation W8000",
1500 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1501 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1505 .callback = force_acpi_ht,
1506 .ident = "ASUS P4B266",
1508 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1509 DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1513 .callback = force_acpi_ht,
1514 .ident = "ASUS P2B-DS",
1516 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1517 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1521 .callback = force_acpi_ht,
1522 .ident = "ASUS CUR-DLS",
1524 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1525 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1529 .callback = force_acpi_ht,
1530 .ident = "ABIT i440BX-W83977",
1532 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1533 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1537 .callback = force_acpi_ht,
1538 .ident = "IBM Bladecenter",
1540 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1541 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1545 .callback = force_acpi_ht,
1546 .ident = "IBM eServer xSeries 360",
1548 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1549 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1553 .callback = force_acpi_ht,
1554 .ident = "IBM eserver xSeries 330",
1556 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1557 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1561 .callback = force_acpi_ht,
1562 .ident = "IBM eserver xSeries 440",
1564 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1565 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1570 * Boxes that need ACPI PCI IRQ routing disabled
1573 .callback = disable_acpi_irq,
1574 .ident = "ASUS A7V",
1576 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1577 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1578 /* newer BIOS, Revision 1011, does work */
1579 DMI_MATCH(DMI_BIOS_VERSION,
1580 "ASUS A7V ACPI BIOS Revision 1007"),
1585 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1586 * for LPC bridge, which is needed for the PCI
1587 * interrupt links to work. DSDT fix is in bug 5966.
1588 * 2645, 2646 model numbers are shared with 600/600E/600X
1590 .callback = disable_acpi_irq,
1591 .ident = "IBM Thinkpad 600 Series 2645",
1593 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1594 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1598 .callback = disable_acpi_irq,
1599 .ident = "IBM Thinkpad 600 Series 2646",
1601 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1602 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1606 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1609 .callback = disable_acpi_pci,
1610 .ident = "ASUS PR-DLS",
1612 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1613 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1614 DMI_MATCH(DMI_BIOS_VERSION,
1615 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1616 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1620 .callback = disable_acpi_pci,
1621 .ident = "Acer TravelMate 36x Laptop",
1623 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1624 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1628 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1629 * which includes some code which overrides all temperature
1630 * trip points to 16C if the INTIN2 input of the I/O APIC
1631 * is enabled. This input is incorrectly designated the
1632 * ISA IRQ 0 via an interrupt source override even though
1633 * it is wired to the output of the master 8259A and INTIN0
1634 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1635 * override in that cases.
1638 .callback = dmi_ignore_irq0_timer_override,
1639 .ident = "HP nx6115 laptop",
1641 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1642 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1646 .callback = dmi_ignore_irq0_timer_override,
1647 .ident = "HP NX6125 laptop",
1649 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1650 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1654 .callback = dmi_ignore_irq0_timer_override,
1655 .ident = "HP NX6325 laptop",
1657 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1658 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1662 .callback = dmi_ignore_irq0_timer_override,
1663 .ident = "HP 6715b laptop",
1665 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1666 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1673 * acpi_boot_table_init() and acpi_boot_init()
1674 * called from setup_arch(), always.
1675 * 1. checksums all tables
1676 * 2. enumerates lapics
1677 * 3. enumerates io-apics
1679 * acpi_table_init() is separate to allow reading SRAT without
1680 * other side effects.
1682 * side effects of acpi_boot_init:
1683 * acpi_lapic = 1 if LAPIC found
1684 * acpi_ioapic = 1 if IOAPIC found
1685 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1686 * if acpi_blacklisted() acpi_disabled = 1;
1687 * acpi_irq_model=...
1690 * return value: (currently ignored)
1695 int __init acpi_boot_table_init(void)
1699 dmi_check_system(acpi_dmi_table);
1702 * If acpi_disabled, bail out
1703 * One exception: acpi=ht continues far enough to enumerate LAPICs
1705 if (acpi_disabled && !acpi_ht)
1709 * Initialize the ACPI boot-time table parser.
1711 error = acpi_table_init();
1717 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1720 * blacklist may disable ACPI entirely
1722 error = acpi_blacklisted();
1725 printk(KERN_WARNING PREFIX "acpi=force override\n");
1727 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1736 int __init early_acpi_boot_init(void)
1739 * If acpi_disabled, bail out
1740 * One exception: acpi=ht continues far enough to enumerate LAPICs
1742 if (acpi_disabled && !acpi_ht)
1746 * Process the Multiple APIC Description Table (MADT), if present
1748 early_acpi_process_madt();
1753 int __init acpi_boot_init(void)
1756 * If acpi_disabled, bail out
1757 * One exception: acpi=ht continues far enough to enumerate LAPICs
1759 if (acpi_disabled && !acpi_ht)
1762 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1765 * set sci_int and PM timer address
1767 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1770 * Process the Multiple APIC Description Table (MADT), if present
1772 acpi_process_madt();
1774 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1779 static int __init parse_acpi(char *arg)
1784 /* "acpi=off" disables both ACPI table parsing and interpreter */
1785 if (strcmp(arg, "off") == 0) {
1788 /* acpi=force to over-ride black-list */
1789 else if (strcmp(arg, "force") == 0) {
1794 /* acpi=strict disables out-of-spec workarounds */
1795 else if (strcmp(arg, "strict") == 0) {
1798 /* Limit ACPI just to boot-time to enable HT */
1799 else if (strcmp(arg, "ht") == 0) {
1804 /* "acpi=noirq" disables ACPI interrupt routing */
1805 else if (strcmp(arg, "noirq") == 0) {
1808 /* Core will printk when we return error. */
1813 early_param("acpi", parse_acpi);
1815 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1816 static int __init parse_pci(char *arg)
1818 if (arg && strcmp(arg, "noacpi") == 0)
1822 early_param("pci", parse_pci);
1824 int __init acpi_mps_check(void)
1826 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1827 /* mptable code is not built-in*/
1828 if (acpi_disabled || acpi_noirq) {
1829 printk(KERN_WARNING "MPS support code is not built-in.\n"
1830 "Using acpi=off or acpi=noirq or pci=noacpi "
1831 "may have problem\n");
1838 #ifdef CONFIG_X86_IO_APIC
1839 static int __init parse_acpi_skip_timer_override(char *arg)
1841 acpi_skip_timer_override = 1;
1844 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1846 static int __init parse_acpi_use_timer_override(char *arg)
1848 acpi_use_timer_override = 1;
1851 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1852 #endif /* CONFIG_X86_IO_APIC */
1854 static int __init setup_acpi_sci(char *s)
1858 if (!strcmp(s, "edge"))
1859 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1860 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1861 else if (!strcmp(s, "level"))
1862 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1863 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1864 else if (!strcmp(s, "high"))
1865 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1866 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1867 else if (!strcmp(s, "low"))
1868 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1869 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1874 early_param("acpi_sci", setup_acpi_sci);
1876 int __acpi_acquire_global_lock(unsigned int *lock)
1878 unsigned int old, new, val;
1881 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1882 val = cmpxchg(lock, old, new);
1883 } while (unlikely (val != old));
1884 return (new < 3) ? -1 : 0;
1887 int __acpi_release_global_lock(unsigned int *lock)
1889 unsigned int old, new, val;
1893 val = cmpxchg(lock, old, new);
1894 } while (unlikely (val != old));