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
157 static int acpi_mcfg_64bit_base_addr __initdata = FALSE;
159 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
160 struct acpi_mcfg_allocation *pci_mmcfg_config;
161 int pci_mmcfg_config_num;
163 static int __init acpi_mcfg_oem_check(struct acpi_table_mcfg *mcfg)
165 if (!strcmp(mcfg->header.oem_id, "SGI"))
166 acpi_mcfg_64bit_base_addr = TRUE;
171 int __init acpi_parse_mcfg(struct acpi_table_header *header)
173 struct acpi_table_mcfg *mcfg;
180 mcfg = (struct acpi_table_mcfg *)header;
182 /* how many config structures do we have */
183 pci_mmcfg_config_num = 0;
184 i = header->length - sizeof(struct acpi_table_mcfg);
185 while (i >= sizeof(struct acpi_mcfg_allocation)) {
186 ++pci_mmcfg_config_num;
187 i -= sizeof(struct acpi_mcfg_allocation);
189 if (pci_mmcfg_config_num == 0) {
190 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
194 config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
195 pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
196 if (!pci_mmcfg_config) {
197 printk(KERN_WARNING PREFIX
198 "No memory for MCFG config tables\n");
202 memcpy(pci_mmcfg_config, &mcfg[1], config_size);
204 acpi_mcfg_oem_check(mcfg);
206 for (i = 0; i < pci_mmcfg_config_num; ++i) {
207 if ((pci_mmcfg_config[i].address > 0xFFFFFFFF) &&
208 !acpi_mcfg_64bit_base_addr) {
209 printk(KERN_ERR PREFIX
210 "MMCONFIG not in low 4GB of memory\n");
211 kfree(pci_mmcfg_config);
212 pci_mmcfg_config_num = 0;
219 #endif /* CONFIG_PCI_MMCONFIG */
221 #ifdef CONFIG_X86_LOCAL_APIC
222 static int __init acpi_parse_madt(struct acpi_table_header *table)
224 struct acpi_table_madt *madt = NULL;
229 madt = (struct acpi_table_madt *)table;
231 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
236 acpi_lapic_addr = (u64) madt->address;
238 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
242 acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
247 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
249 unsigned int ver = 0;
256 if (boot_cpu_physical_apicid != -1U)
257 ver = apic_version[boot_cpu_physical_apicid];
259 generic_processor_info(id, ver);
263 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
265 struct acpi_madt_local_x2apic *processor = NULL;
267 processor = (struct acpi_madt_local_x2apic *)header;
269 if (BAD_MADT_ENTRY(processor, end))
272 acpi_table_print_madt_entry(header);
274 #ifdef CONFIG_X86_X2APIC
276 * We need to register disabled CPU as well to permit
277 * counting disabled CPUs. This allows us to size
278 * cpus_possible_map more accurately, to permit
279 * to not preallocating memory for all NR_CPUS
280 * when we use CPU hotplug.
282 acpi_register_lapic(processor->local_apic_id, /* APIC ID */
283 processor->lapic_flags & ACPI_MADT_ENABLED);
285 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
292 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
294 struct acpi_madt_local_apic *processor = NULL;
296 processor = (struct acpi_madt_local_apic *)header;
298 if (BAD_MADT_ENTRY(processor, end))
301 acpi_table_print_madt_entry(header);
304 * We need to register disabled CPU as well to permit
305 * counting disabled CPUs. This allows us to size
306 * cpus_possible_map more accurately, to permit
307 * to not preallocating memory for all NR_CPUS
308 * when we use CPU hotplug.
310 acpi_register_lapic(processor->id, /* APIC ID */
311 processor->lapic_flags & ACPI_MADT_ENABLED);
317 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
319 struct acpi_madt_local_sapic *processor = NULL;
321 processor = (struct acpi_madt_local_sapic *)header;
323 if (BAD_MADT_ENTRY(processor, end))
326 acpi_table_print_madt_entry(header);
328 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
329 processor->lapic_flags & ACPI_MADT_ENABLED);
335 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
336 const unsigned long end)
338 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
340 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
342 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
345 acpi_lapic_addr = lapic_addr_ovr->address;
351 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
352 const unsigned long end)
354 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
356 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
358 if (BAD_MADT_ENTRY(x2apic_nmi, end))
361 acpi_table_print_madt_entry(header);
363 if (x2apic_nmi->lint != 1)
364 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
370 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
372 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
374 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
376 if (BAD_MADT_ENTRY(lapic_nmi, end))
379 acpi_table_print_madt_entry(header);
381 if (lapic_nmi->lint != 1)
382 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
387 #endif /*CONFIG_X86_LOCAL_APIC */
389 #ifdef CONFIG_X86_IO_APIC
392 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
394 struct acpi_madt_io_apic *ioapic = NULL;
396 ioapic = (struct acpi_madt_io_apic *)header;
398 if (BAD_MADT_ENTRY(ioapic, end))
401 acpi_table_print_madt_entry(header);
403 mp_register_ioapic(ioapic->id,
404 ioapic->address, ioapic->global_irq_base);
410 * Parse Interrupt Source Override for the ACPI SCI
412 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
414 if (trigger == 0) /* compatible SCI trigger is level */
417 if (polarity == 0) /* compatible SCI polarity is low */
420 /* Command-line over-ride via acpi_sci= */
421 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
422 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
424 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
425 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
428 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
429 * If GSI is < 16, this will update its flags,
430 * else it will create a new mp_irqs[] entry.
432 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
435 * stash over-ride to indicate we've been here
436 * and for later update of acpi_gbl_FADT
438 acpi_sci_override_gsi = gsi;
443 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
444 const unsigned long end)
446 struct acpi_madt_interrupt_override *intsrc = NULL;
448 intsrc = (struct acpi_madt_interrupt_override *)header;
450 if (BAD_MADT_ENTRY(intsrc, end))
453 acpi_table_print_madt_entry(header);
455 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
456 acpi_sci_ioapic_setup(intsrc->global_irq,
457 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
458 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
462 if (acpi_skip_timer_override &&
463 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
464 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
468 mp_override_legacy_irq(intsrc->source_irq,
469 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
470 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
477 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
479 struct acpi_madt_nmi_source *nmi_src = NULL;
481 nmi_src = (struct acpi_madt_nmi_source *)header;
483 if (BAD_MADT_ENTRY(nmi_src, end))
486 acpi_table_print_madt_entry(header);
488 /* TBD: Support nimsrc entries? */
493 #endif /* CONFIG_X86_IO_APIC */
496 * acpi_pic_sci_set_trigger()
498 * use ELCR to set PIC-mode trigger type for SCI
500 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
501 * it may require Edge Trigger -- use "acpi_sci=edge"
503 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
504 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
505 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
506 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
509 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
511 unsigned int mask = 1 << irq;
512 unsigned int old, new;
514 /* Real old ELCR mask */
515 old = inb(0x4d0) | (inb(0x4d1) << 8);
518 * If we use ACPI to set PCI IRQs, then we should clear ELCR
519 * since we will set it correctly as we enable the PCI irq
522 new = acpi_noirq ? old : 0;
525 * Update SCI information in the ELCR, it isn't in the PCI
529 case 1: /* Edge - clear */
532 case 3: /* Level - set */
540 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
542 outb(new >> 8, 0x4d1);
545 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
552 * success: return IRQ number (>=0)
553 * failure: return < 0
555 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
558 unsigned int plat_gsi = gsi;
562 * Make sure all (legacy) PCI IRQs are set as level-triggered.
564 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
565 if (triggering == ACPI_LEVEL_SENSITIVE)
566 eisa_set_level_irq(gsi);
570 #ifdef CONFIG_X86_IO_APIC
571 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
572 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
575 acpi_gsi_to_irq(plat_gsi, &irq);
580 * ACPI based hotplug support for CPU
582 #ifdef CONFIG_ACPI_HOTPLUG_CPU
584 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
586 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
587 union acpi_object *obj;
588 struct acpi_madt_local_apic *lapic;
589 cpumask_var_t tmp_map, new_map;
592 int retval = -ENOMEM;
594 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
597 if (!buffer.length || !buffer.pointer)
600 obj = buffer.pointer;
601 if (obj->type != ACPI_TYPE_BUFFER ||
602 obj->buffer.length < sizeof(*lapic)) {
603 kfree(buffer.pointer);
607 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
609 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
610 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
611 kfree(buffer.pointer);
617 kfree(buffer.pointer);
618 buffer.length = ACPI_ALLOCATE_BUFFER;
619 buffer.pointer = NULL;
621 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
624 if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
627 cpumask_copy(tmp_map, cpu_present_mask);
628 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
631 * If mp_register_lapic successfully generates a new logical cpu
632 * number, then the following will get us exactly what was mapped
634 cpumask_andnot(new_map, cpu_present_mask, tmp_map);
635 if (cpumask_empty(new_map)) {
636 printk ("Unable to map lapic to logical cpu number\n");
641 cpu = cpumask_first(new_map);
647 free_cpumask_var(new_map);
649 free_cpumask_var(tmp_map);
654 /* wrapper to silence section mismatch warning */
655 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
657 return _acpi_map_lsapic(handle, pcpu);
659 EXPORT_SYMBOL(acpi_map_lsapic);
661 int acpi_unmap_lsapic(int cpu)
663 per_cpu(x86_cpu_to_apicid, cpu) = -1;
664 set_cpu_present(cpu, false);
670 EXPORT_SYMBOL(acpi_unmap_lsapic);
671 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
673 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
679 EXPORT_SYMBOL(acpi_register_ioapic);
681 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
687 EXPORT_SYMBOL(acpi_unregister_ioapic);
689 static int __init acpi_parse_sbf(struct acpi_table_header *table)
691 struct acpi_table_boot *sb;
693 sb = (struct acpi_table_boot *)table;
695 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
699 sbf_port = sb->cmos_index; /* Save CMOS port */
704 #ifdef CONFIG_HPET_TIMER
705 #include <asm/hpet.h>
707 static struct __initdata resource *hpet_res;
709 static int __init acpi_parse_hpet(struct acpi_table_header *table)
711 struct acpi_table_hpet *hpet_tbl;
713 hpet_tbl = (struct acpi_table_hpet *)table;
715 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
719 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
720 printk(KERN_WARNING PREFIX "HPET timers must be located in "
725 hpet_address = hpet_tbl->address.address;
728 * Some broken BIOSes advertise HPET at 0x0. We really do not
729 * want to allocate a resource there.
732 printk(KERN_WARNING PREFIX
733 "HPET id: %#x base: %#lx is invalid\n",
734 hpet_tbl->id, hpet_address);
739 * Some even more broken BIOSes advertise HPET at
740 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
743 if (hpet_address == 0xfed0000000000000UL) {
744 if (!hpet_force_user) {
745 printk(KERN_WARNING PREFIX "HPET id: %#x "
746 "base: 0xfed0000000000000 is bogus\n "
747 "try hpet=force on the kernel command line to "
748 "fix it up to 0xfed00000.\n", hpet_tbl->id);
752 printk(KERN_WARNING PREFIX
753 "HPET id: %#x base: 0xfed0000000000000 fixed up "
754 "to 0xfed00000.\n", hpet_tbl->id);
758 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
759 hpet_tbl->id, hpet_address);
762 * Allocate and initialize the HPET firmware resource for adding into
763 * the resource tree during the lateinit timeframe.
765 #define HPET_RESOURCE_NAME_SIZE 9
766 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
768 hpet_res->name = (void *)&hpet_res[1];
769 hpet_res->flags = IORESOURCE_MEM;
770 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
773 hpet_res->start = hpet_address;
774 hpet_res->end = hpet_address + (1 * 1024) - 1;
780 * hpet_insert_resource inserts the HPET resources used into the resource
783 static __init int hpet_insert_resource(void)
788 return insert_resource(&iomem_resource, hpet_res);
791 late_initcall(hpet_insert_resource);
794 #define acpi_parse_hpet NULL
797 static int __init acpi_parse_fadt(struct acpi_table_header *table)
800 #ifdef CONFIG_X86_PM_TIMER
801 /* detect the location of the ACPI PM Timer */
802 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
804 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
805 ACPI_ADR_SPACE_SYSTEM_IO)
808 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
810 * "X" fields are optional extensions to the original V1.0
811 * fields, so we must selectively expand V1.0 fields if the
812 * corresponding X field is zero.
815 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
818 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
821 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
827 #ifdef CONFIG_X86_LOCAL_APIC
829 * Parse LAPIC entries in MADT
830 * returns 0 on success, < 0 on error
833 static void __init acpi_register_lapic_address(unsigned long address)
835 mp_lapic_addr = address;
837 set_fixmap_nocache(FIX_APIC_BASE, address);
838 if (boot_cpu_physical_apicid == -1U) {
839 boot_cpu_physical_apicid = read_apic_id();
840 apic_version[boot_cpu_physical_apicid] =
841 GET_APIC_VERSION(apic_read(APIC_LVR));
845 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
853 * Note that the LAPIC address is obtained from the MADT (32-bit value)
854 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
858 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
859 acpi_parse_lapic_addr_ovr, 0);
861 printk(KERN_ERR PREFIX
862 "Error parsing LAPIC address override entry\n");
866 acpi_register_lapic_address(acpi_lapic_addr);
871 static int __init acpi_parse_madt_lapic_entries(void)
880 * Note that the LAPIC address is obtained from the MADT (32-bit value)
881 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
885 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
886 acpi_parse_lapic_addr_ovr, 0);
888 printk(KERN_ERR PREFIX
889 "Error parsing LAPIC address override entry\n");
893 acpi_register_lapic_address(acpi_lapic_addr);
895 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
896 acpi_parse_sapic, MAX_APICS);
899 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
900 acpi_parse_x2apic, MAX_APICS);
901 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
902 acpi_parse_lapic, MAX_APICS);
904 if (!count && !x2count) {
905 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
906 /* TBD: Cleanup to allow fallback to MPS */
908 } else if (count < 0 || x2count < 0) {
909 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
910 /* TBD: Cleanup to allow fallback to MPS */
915 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
916 acpi_parse_x2apic_nmi, 0);
918 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
919 if (count < 0 || x2count < 0) {
920 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
921 /* TBD: Cleanup to allow fallback to MPS */
926 #endif /* CONFIG_X86_LOCAL_APIC */
928 #ifdef CONFIG_X86_IO_APIC
931 #ifdef CONFIG_X86_ES7000
932 extern int es7000_plat;
939 DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1);
940 } mp_ioapic_routing[MAX_IO_APICS];
942 static int mp_find_ioapic(int gsi)
946 /* Find the IOAPIC that manages this GSI. */
947 for (i = 0; i < nr_ioapics; i++) {
948 if ((gsi >= mp_ioapic_routing[i].gsi_base)
949 && (gsi <= mp_ioapic_routing[i].gsi_end))
953 printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
957 static u8 __init uniq_ioapic_id(u8 id)
960 if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
961 !APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
962 return io_apic_get_unique_id(nr_ioapics, id);
967 DECLARE_BITMAP(used, 256);
968 bitmap_zero(used, 256);
969 for (i = 0; i < nr_ioapics; i++) {
970 struct mp_config_ioapic *ia = &mp_ioapics[i];
971 __set_bit(ia->mp_apicid, used);
973 if (!test_bit(id, used))
975 return find_first_zero_bit(used, 256);
979 static int bad_ioapic(unsigned long address)
981 if (nr_ioapics >= MAX_IO_APICS) {
982 printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
983 "(found %d)\n", MAX_IO_APICS, nr_ioapics);
984 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
987 printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
988 " found in table, skipping!\n");
994 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
998 if (bad_ioapic(address))
1003 mp_ioapics[idx].mp_type = MP_IOAPIC;
1004 mp_ioapics[idx].mp_flags = MPC_APIC_USABLE;
1005 mp_ioapics[idx].mp_apicaddr = address;
1007 set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
1008 mp_ioapics[idx].mp_apicid = uniq_ioapic_id(id);
1009 #ifdef CONFIG_X86_32
1010 mp_ioapics[idx].mp_apicver = io_apic_get_version(idx);
1012 mp_ioapics[idx].mp_apicver = 0;
1015 * Build basic GSI lookup table to facilitate gsi->io_apic lookups
1016 * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
1018 mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mp_apicid;
1019 mp_ioapic_routing[idx].gsi_base = gsi_base;
1020 mp_ioapic_routing[idx].gsi_end = gsi_base +
1021 io_apic_get_redir_entries(idx);
1023 printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%lx, "
1024 "GSI %d-%d\n", idx, mp_ioapics[idx].mp_apicid,
1025 mp_ioapics[idx].mp_apicver, mp_ioapics[idx].mp_apicaddr,
1026 mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end);
1031 int __init acpi_probe_gsi(void)
1044 for (idx = 0; idx < nr_ioapics; idx++) {
1045 gsi = mp_ioapic_routing[idx].gsi_end;
1054 static void assign_to_mp_irq(struct mp_config_intsrc *m,
1055 struct mp_config_intsrc *mp_irq)
1057 memcpy(mp_irq, m, sizeof(struct mp_config_intsrc));
1060 static int mp_irq_cmp(struct mp_config_intsrc *mp_irq,
1061 struct mp_config_intsrc *m)
1063 return memcmp(mp_irq, m, sizeof(struct mp_config_intsrc));
1066 static void save_mp_irq(struct mp_config_intsrc *m)
1070 for (i = 0; i < mp_irq_entries; i++) {
1071 if (!mp_irq_cmp(&mp_irqs[i], m))
1075 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
1076 if (++mp_irq_entries == MAX_IRQ_SOURCES)
1077 panic("Max # of irq sources exceeded!!\n");
1080 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
1084 struct mp_config_intsrc mp_irq;
1087 * Convert 'gsi' to 'ioapic.pin'.
1089 ioapic = mp_find_ioapic(gsi);
1092 pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1095 * TBD: This check is for faulty timer entries, where the override
1096 * erroneously sets the trigger to level, resulting in a HUGE
1097 * increase of timer interrupts!
1099 if ((bus_irq == 0) && (trigger == 3))
1102 mp_irq.mp_type = MP_INTSRC;
1103 mp_irq.mp_irqtype = mp_INT;
1104 mp_irq.mp_irqflag = (trigger << 2) | polarity;
1105 mp_irq.mp_srcbus = MP_ISA_BUS;
1106 mp_irq.mp_srcbusirq = bus_irq; /* IRQ */
1107 mp_irq.mp_dstapic = mp_ioapics[ioapic].mp_apicid; /* APIC ID */
1108 mp_irq.mp_dstirq = pin; /* INTIN# */
1110 save_mp_irq(&mp_irq);
1113 void __init mp_config_acpi_legacy_irqs(void)
1117 unsigned int dstapic;
1118 struct mp_config_intsrc mp_irq;
1120 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
1122 * Fabricate the legacy ISA bus (bus #31).
1124 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1126 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1127 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1129 #ifdef CONFIG_X86_ES7000
1131 * Older generations of ES7000 have no legacy identity mappings
1133 if (es7000_plat == 1)
1138 * Locate the IOAPIC that manages the ISA IRQs (0-15).
1140 ioapic = mp_find_ioapic(0);
1143 dstapic = mp_ioapics[ioapic].mp_apicid;
1146 * Use the default configuration for the IRQs 0-15. Unless
1147 * overridden by (MADT) interrupt source override entries.
1149 for (i = 0; i < 16; i++) {
1152 for (idx = 0; idx < mp_irq_entries; idx++) {
1153 struct mp_config_intsrc *irq = mp_irqs + idx;
1155 /* Do we already have a mapping for this ISA IRQ? */
1156 if (irq->mp_srcbus == MP_ISA_BUS
1157 && irq->mp_srcbusirq == i)
1160 /* Do we already have a mapping for this IOAPIC pin */
1161 if (irq->mp_dstapic == dstapic &&
1162 irq->mp_dstirq == i)
1166 if (idx != mp_irq_entries) {
1167 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1168 continue; /* IRQ already used */
1171 mp_irq.mp_type = MP_INTSRC;
1172 mp_irq.mp_irqflag = 0; /* Conforming */
1173 mp_irq.mp_srcbus = MP_ISA_BUS;
1174 mp_irq.mp_dstapic = dstapic;
1175 mp_irq.mp_irqtype = mp_INT;
1176 mp_irq.mp_srcbusirq = i; /* Identity mapped */
1177 mp_irq.mp_dstirq = i;
1179 save_mp_irq(&mp_irq);
1183 int mp_register_gsi(u32 gsi, int triggering, int polarity)
1187 #ifdef CONFIG_X86_32
1188 #define MAX_GSI_NUM 4096
1189 #define IRQ_COMPRESSION_START 64
1191 static int pci_irq = IRQ_COMPRESSION_START;
1193 * Mapping between Global System Interrupts, which
1194 * represent all possible interrupts, and IRQs
1195 * assigned to actual devices.
1197 static int gsi_to_irq[MAX_GSI_NUM];
1200 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1204 /* Don't set up the ACPI SCI because it's already set up */
1205 if (acpi_gbl_FADT.sci_interrupt == gsi)
1208 ioapic = mp_find_ioapic(gsi);
1210 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1214 ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1216 #ifdef CONFIG_X86_32
1217 if (ioapic_renumber_irq)
1218 gsi = ioapic_renumber_irq(ioapic, gsi);
1222 * Avoid pin reprogramming. PRTs typically include entries
1223 * with redundant pin->gsi mappings (but unique PCI devices);
1224 * we only program the IOAPIC on the first.
1226 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1227 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1228 "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
1232 if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) {
1233 pr_debug("Pin %d-%d already programmed\n",
1234 mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
1235 #ifdef CONFIG_X86_32
1236 return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]);
1242 set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed);
1243 #ifdef CONFIG_X86_32
1245 * For GSI >= 64, use IRQ compression
1247 if ((gsi >= IRQ_COMPRESSION_START)
1248 && (triggering == ACPI_LEVEL_SENSITIVE)) {
1250 * For PCI devices assign IRQs in order, avoiding gaps
1251 * due to unused I/O APIC pins.
1254 if (gsi < MAX_GSI_NUM) {
1256 * Retain the VIA chipset work-around (gsi > 15), but
1257 * avoid a problem where the 8254 timer (IRQ0) is setup
1258 * via an override (so it's not on pin 0 of the ioapic),
1259 * and at the same time, the pin 0 interrupt is a PCI
1260 * type. The gsi > 15 test could cause these two pins
1261 * to be shared as IRQ0, and they are not shareable.
1262 * So test for this condition, and if necessary, avoid
1263 * the pin collision.
1267 * Don't assign IRQ used by ACPI SCI
1269 if (gsi == acpi_gbl_FADT.sci_interrupt)
1271 gsi_to_irq[irq] = gsi;
1273 printk(KERN_ERR "GSI %u is too high\n", gsi);
1278 io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
1279 triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
1280 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1284 int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin,
1285 u32 gsi, int triggering, int polarity)
1287 #ifdef CONFIG_X86_MPPARSE
1288 struct mp_config_intsrc mp_irq;
1294 /* print the entry should happen on mptable identically */
1295 mp_irq.mp_type = MP_INTSRC;
1296 mp_irq.mp_irqtype = mp_INT;
1297 mp_irq.mp_irqflag = (triggering == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1298 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1299 mp_irq.mp_srcbus = number;
1300 mp_irq.mp_srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1301 ioapic = mp_find_ioapic(gsi);
1302 mp_irq.mp_dstapic = mp_ioapic_routing[ioapic].apic_id;
1303 mp_irq.mp_dstirq = gsi - mp_ioapic_routing[ioapic].gsi_base;
1305 save_mp_irq(&mp_irq);
1311 * Parse IOAPIC related entries in MADT
1312 * returns 0 on success, < 0 on error
1314 static int __init acpi_parse_madt_ioapic_entries(void)
1319 * ACPI interpreter is required to complete interrupt setup,
1320 * so if it is off, don't enumerate the io-apics with ACPI.
1321 * If MPS is present, it will handle them,
1322 * otherwise the system will stay in PIC mode
1324 if (acpi_disabled || acpi_noirq) {
1332 * if "noapic" boot option, don't look for IO-APICs
1334 if (skip_ioapic_setup) {
1335 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1336 "due to 'noapic' option.\n");
1341 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1344 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1346 } else if (count < 0) {
1347 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1352 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1355 printk(KERN_ERR PREFIX
1356 "Error parsing interrupt source overrides entry\n");
1357 /* TBD: Cleanup to allow fallback to MPS */
1362 * If BIOS did not supply an INT_SRC_OVR for the SCI
1363 * pretend we got one so we can set the SCI flags.
1365 if (!acpi_sci_override_gsi)
1366 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1368 /* Fill in identity legacy mapings where no override */
1369 mp_config_acpi_legacy_irqs();
1372 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1375 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1376 /* TBD: Cleanup to allow fallback to MPS */
1383 static inline int acpi_parse_madt_ioapic_entries(void)
1387 #endif /* !CONFIG_X86_IO_APIC */
1389 static void __init early_acpi_process_madt(void)
1391 #ifdef CONFIG_X86_LOCAL_APIC
1394 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1397 * Parse MADT LAPIC entries
1399 error = early_acpi_parse_madt_lapic_addr_ovr();
1402 smp_found_config = 1;
1404 if (error == -EINVAL) {
1406 * Dell Precision Workstation 410, 610 come here.
1408 printk(KERN_ERR PREFIX
1409 "Invalid BIOS MADT, disabling ACPI\n");
1416 static void __init acpi_process_madt(void)
1418 #ifdef CONFIG_X86_LOCAL_APIC
1421 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1424 * Parse MADT LAPIC entries
1426 error = acpi_parse_madt_lapic_entries();
1430 #ifdef CONFIG_X86_GENERICARCH
1431 generic_bigsmp_probe();
1434 * Parse MADT IO-APIC entries
1436 error = acpi_parse_madt_ioapic_entries();
1438 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1441 smp_found_config = 1;
1442 #ifdef CONFIG_X86_32
1443 setup_apic_routing();
1447 if (error == -EINVAL) {
1449 * Dell Precision Workstation 410, 610 come here.
1451 printk(KERN_ERR PREFIX
1452 "Invalid BIOS MADT, disabling ACPI\n");
1457 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1458 * In the event an MPS table was found, forget it.
1459 * Boot with "acpi=off" to use MPS on such a system.
1461 if (smp_found_config) {
1462 printk(KERN_WARNING PREFIX
1463 "No APIC-table, disabling MPS\n");
1464 smp_found_config = 0;
1469 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1470 * processors, where MPS only supports physical.
1472 if (acpi_lapic && acpi_ioapic)
1473 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1475 else if (acpi_lapic)
1476 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1477 "configuration information\n");
1482 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1485 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1492 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1495 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1502 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1505 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1509 "Warning: DMI blacklist says broken, but acpi forced\n");
1515 * Limit ACPI to CPU enumeration for HT
1517 static int __init force_acpi_ht(const struct dmi_system_id *d)
1520 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1526 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1532 * Force ignoring BIOS IRQ0 pin2 override
1534 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1537 * The ati_ixp4x0_rev() early PCI quirk should have set
1538 * the acpi_skip_timer_override flag already:
1540 if (!acpi_skip_timer_override) {
1541 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1542 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1544 acpi_skip_timer_override = 1;
1550 * If your system is blacklisted here, but you find that acpi=force
1551 * works for you, please contact linux-acpi@vger.kernel.org
1553 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1555 * Boxes that need ACPI disabled
1558 .callback = dmi_disable_acpi,
1559 .ident = "IBM Thinkpad",
1561 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1562 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1567 * Boxes that need acpi=ht
1570 .callback = force_acpi_ht,
1571 .ident = "FSC Primergy T850",
1573 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1574 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1578 .callback = force_acpi_ht,
1579 .ident = "HP VISUALIZE NT Workstation",
1581 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1582 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1586 .callback = force_acpi_ht,
1587 .ident = "Compaq Workstation W8000",
1589 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1590 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1594 .callback = force_acpi_ht,
1595 .ident = "ASUS P4B266",
1597 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1598 DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1602 .callback = force_acpi_ht,
1603 .ident = "ASUS P2B-DS",
1605 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1606 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1610 .callback = force_acpi_ht,
1611 .ident = "ASUS CUR-DLS",
1613 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1614 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1618 .callback = force_acpi_ht,
1619 .ident = "ABIT i440BX-W83977",
1621 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1622 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1626 .callback = force_acpi_ht,
1627 .ident = "IBM Bladecenter",
1629 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1630 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1634 .callback = force_acpi_ht,
1635 .ident = "IBM eServer xSeries 360",
1637 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1638 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1642 .callback = force_acpi_ht,
1643 .ident = "IBM eserver xSeries 330",
1645 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1646 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1650 .callback = force_acpi_ht,
1651 .ident = "IBM eserver xSeries 440",
1653 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1654 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1659 * Boxes that need ACPI PCI IRQ routing disabled
1662 .callback = disable_acpi_irq,
1663 .ident = "ASUS A7V",
1665 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1666 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1667 /* newer BIOS, Revision 1011, does work */
1668 DMI_MATCH(DMI_BIOS_VERSION,
1669 "ASUS A7V ACPI BIOS Revision 1007"),
1674 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1675 * for LPC bridge, which is needed for the PCI
1676 * interrupt links to work. DSDT fix is in bug 5966.
1677 * 2645, 2646 model numbers are shared with 600/600E/600X
1679 .callback = disable_acpi_irq,
1680 .ident = "IBM Thinkpad 600 Series 2645",
1682 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1683 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1687 .callback = disable_acpi_irq,
1688 .ident = "IBM Thinkpad 600 Series 2646",
1690 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1691 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1695 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1698 .callback = disable_acpi_pci,
1699 .ident = "ASUS PR-DLS",
1701 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1702 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1703 DMI_MATCH(DMI_BIOS_VERSION,
1704 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1705 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1709 .callback = disable_acpi_pci,
1710 .ident = "Acer TravelMate 36x Laptop",
1712 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1713 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1719 /* second table for DMI checks that should run after early-quirks */
1720 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1722 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1723 * which includes some code which overrides all temperature
1724 * trip points to 16C if the INTIN2 input of the I/O APIC
1725 * is enabled. This input is incorrectly designated the
1726 * ISA IRQ 0 via an interrupt source override even though
1727 * it is wired to the output of the master 8259A and INTIN0
1728 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1729 * override in that cases.
1732 .callback = dmi_ignore_irq0_timer_override,
1733 .ident = "HP nx6115 laptop",
1735 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1736 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1740 .callback = dmi_ignore_irq0_timer_override,
1741 .ident = "HP NX6125 laptop",
1743 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1744 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1748 .callback = dmi_ignore_irq0_timer_override,
1749 .ident = "HP NX6325 laptop",
1751 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1752 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1756 .callback = dmi_ignore_irq0_timer_override,
1757 .ident = "HP 6715b laptop",
1759 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1760 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1767 * acpi_boot_table_init() and acpi_boot_init()
1768 * called from setup_arch(), always.
1769 * 1. checksums all tables
1770 * 2. enumerates lapics
1771 * 3. enumerates io-apics
1773 * acpi_table_init() is separate to allow reading SRAT without
1774 * other side effects.
1776 * side effects of acpi_boot_init:
1777 * acpi_lapic = 1 if LAPIC found
1778 * acpi_ioapic = 1 if IOAPIC found
1779 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1780 * if acpi_blacklisted() acpi_disabled = 1;
1781 * acpi_irq_model=...
1784 * return value: (currently ignored)
1789 int __init acpi_boot_table_init(void)
1793 dmi_check_system(acpi_dmi_table);
1796 * If acpi_disabled, bail out
1797 * One exception: acpi=ht continues far enough to enumerate LAPICs
1799 if (acpi_disabled && !acpi_ht)
1803 * Initialize the ACPI boot-time table parser.
1805 error = acpi_table_init();
1811 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1814 * blacklist may disable ACPI entirely
1816 error = acpi_blacklisted();
1819 printk(KERN_WARNING PREFIX "acpi=force override\n");
1821 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1830 int __init early_acpi_boot_init(void)
1833 * If acpi_disabled, bail out
1834 * One exception: acpi=ht continues far enough to enumerate LAPICs
1836 if (acpi_disabled && !acpi_ht)
1840 * Process the Multiple APIC Description Table (MADT), if present
1842 early_acpi_process_madt();
1847 int __init acpi_boot_init(void)
1849 /* those are executed after early-quirks are executed */
1850 dmi_check_system(acpi_dmi_table_late);
1853 * If acpi_disabled, bail out
1854 * One exception: acpi=ht continues far enough to enumerate LAPICs
1856 if (acpi_disabled && !acpi_ht)
1859 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1862 * set sci_int and PM timer address
1864 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1867 * Process the Multiple APIC Description Table (MADT), if present
1869 acpi_process_madt();
1871 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1876 static int __init parse_acpi(char *arg)
1881 /* "acpi=off" disables both ACPI table parsing and interpreter */
1882 if (strcmp(arg, "off") == 0) {
1885 /* acpi=force to over-ride black-list */
1886 else if (strcmp(arg, "force") == 0) {
1891 /* acpi=strict disables out-of-spec workarounds */
1892 else if (strcmp(arg, "strict") == 0) {
1895 /* Limit ACPI just to boot-time to enable HT */
1896 else if (strcmp(arg, "ht") == 0) {
1901 /* acpi=rsdt use RSDT instead of XSDT */
1902 else if (strcmp(arg, "rsdt") == 0) {
1903 acpi_rsdt_forced = 1;
1905 /* "acpi=noirq" disables ACPI interrupt routing */
1906 else if (strcmp(arg, "noirq") == 0) {
1909 /* Core will printk when we return error. */
1914 early_param("acpi", parse_acpi);
1916 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1917 static int __init parse_pci(char *arg)
1919 if (arg && strcmp(arg, "noacpi") == 0)
1923 early_param("pci", parse_pci);
1925 int __init acpi_mps_check(void)
1927 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1928 /* mptable code is not built-in*/
1929 if (acpi_disabled || acpi_noirq) {
1930 printk(KERN_WARNING "MPS support code is not built-in.\n"
1931 "Using acpi=off or acpi=noirq or pci=noacpi "
1932 "may have problem\n");
1939 #ifdef CONFIG_X86_IO_APIC
1940 static int __init parse_acpi_skip_timer_override(char *arg)
1942 acpi_skip_timer_override = 1;
1945 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1947 static int __init parse_acpi_use_timer_override(char *arg)
1949 acpi_use_timer_override = 1;
1952 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1953 #endif /* CONFIG_X86_IO_APIC */
1955 static int __init setup_acpi_sci(char *s)
1959 if (!strcmp(s, "edge"))
1960 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1961 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1962 else if (!strcmp(s, "level"))
1963 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1964 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1965 else if (!strcmp(s, "high"))
1966 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1967 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1968 else if (!strcmp(s, "low"))
1969 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1970 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1975 early_param("acpi_sci", setup_acpi_sci);
1977 int __acpi_acquire_global_lock(unsigned int *lock)
1979 unsigned int old, new, val;
1982 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1983 val = cmpxchg(lock, old, new);
1984 } while (unlikely (val != old));
1985 return (new < 3) ? -1 : 0;
1988 int __acpi_release_global_lock(unsigned int *lock)
1990 unsigned int old, new, val;
1994 val = cmpxchg(lock, old, new);
1995 } while (unlikely (val != old));