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>
41 #include <asm/mpspec.h>
43 static int __initdata acpi_force = 0;
46 int acpi_disabled = 0;
48 int acpi_disabled = 1;
50 EXPORT_SYMBOL(acpi_disabled);
54 #include <asm/proto.h>
56 static inline int acpi_madt_oem_check(char *oem_id, char *oem_table_id) { return 0; }
61 #ifdef CONFIG_X86_LOCAL_APIC
62 #include <mach_apic.h>
63 #include <mach_mpparse.h>
64 #endif /* CONFIG_X86_LOCAL_APIC */
68 #define BAD_MADT_ENTRY(entry, end) ( \
69 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
70 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
72 #define PREFIX "ACPI: "
74 int acpi_noirq; /* skip ACPI IRQ initialization */
75 int acpi_pci_disabled __initdata; /* skip ACPI PCI scan and IRQ initialization */
76 int acpi_ht __initdata = 1; /* enable HT */
81 EXPORT_SYMBOL(acpi_strict);
83 u8 acpi_sci_flags __initdata;
84 int acpi_sci_override_gsi __initdata;
85 int acpi_skip_timer_override __initdata;
86 int acpi_use_timer_override __initdata;
88 #ifdef CONFIG_X86_LOCAL_APIC
89 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
92 #ifndef __HAVE_ARCH_CMPXCHG
93 #warning ACPI uses CMPXCHG, i486 and later hardware
96 /* --------------------------------------------------------------------------
97 Boot-time Configuration
98 -------------------------------------------------------------------------- */
101 * The default interrupt routing model is PIC (8259). This gets
102 * overridden if IOAPICs are enumerated (below).
104 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
108 /* rely on all ACPI tables being in the direct mapping */
109 char *__acpi_map_table(unsigned long phys_addr, unsigned long size)
111 if (!phys_addr || !size)
114 if (phys_addr+size <= (end_pfn_map << PAGE_SHIFT) + PAGE_SIZE)
115 return __va(phys_addr);
123 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
124 * to map the target physical address. The problem is that set_fixmap()
125 * provides a single page, and it is possible that the page is not
127 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
128 * i.e. until the next __va_range() call.
130 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
131 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
132 * count idx down while incrementing the phys address.
134 char *__acpi_map_table(unsigned long phys, unsigned long size)
136 unsigned long base, offset, mapped_size;
139 if (phys + size < 8 * 1024 * 1024)
142 offset = phys & (PAGE_SIZE - 1);
143 mapped_size = PAGE_SIZE - offset;
144 set_fixmap(FIX_ACPI_END, phys);
145 base = fix_to_virt(FIX_ACPI_END);
148 * Most cases can be covered by the below.
151 while (mapped_size < size) {
152 if (--idx < FIX_ACPI_BEGIN)
153 return NULL; /* cannot handle this */
155 set_fixmap(idx, phys);
156 mapped_size += PAGE_SIZE;
159 return ((unsigned char *)base + offset);
163 #ifdef CONFIG_PCI_MMCONFIG
164 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
165 struct acpi_mcfg_allocation *pci_mmcfg_config;
166 int pci_mmcfg_config_num;
168 int __init acpi_parse_mcfg(struct acpi_table_header *header)
170 struct acpi_table_mcfg *mcfg;
177 mcfg = (struct acpi_table_mcfg *)header;
179 /* how many config structures do we have */
180 pci_mmcfg_config_num = 0;
181 i = header->length - sizeof(struct acpi_table_mcfg);
182 while (i >= sizeof(struct acpi_mcfg_allocation)) {
183 ++pci_mmcfg_config_num;
184 i -= sizeof(struct acpi_mcfg_allocation);
186 if (pci_mmcfg_config_num == 0) {
187 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
191 config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
192 pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
193 if (!pci_mmcfg_config) {
194 printk(KERN_WARNING PREFIX
195 "No memory for MCFG config tables\n");
199 memcpy(pci_mmcfg_config, &mcfg[1], config_size);
200 for (i = 0; i < pci_mmcfg_config_num; ++i) {
201 if (pci_mmcfg_config[i].address > 0xFFFFFFFF) {
202 printk(KERN_ERR PREFIX
203 "MMCONFIG not in low 4GB of memory\n");
204 kfree(pci_mmcfg_config);
205 pci_mmcfg_config_num = 0;
212 #endif /* CONFIG_PCI_MMCONFIG */
214 #ifdef CONFIG_X86_LOCAL_APIC
215 static int __init acpi_parse_madt(struct acpi_table_header *table)
217 struct acpi_table_madt *madt = NULL;
222 madt = (struct acpi_table_madt *)table;
224 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
229 acpi_lapic_addr = (u64) madt->address;
231 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
235 acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
241 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
243 struct acpi_madt_local_apic *processor = NULL;
245 processor = (struct acpi_madt_local_apic *)header;
247 if (BAD_MADT_ENTRY(processor, end))
250 acpi_table_print_madt_entry(header);
253 * We need to register disabled CPU as well to permit
254 * counting disabled CPUs. This allows us to size
255 * cpus_possible_map more accurately, to permit
256 * to not preallocating memory for all NR_CPUS
257 * when we use CPU hotplug.
259 mp_register_lapic(processor->id, /* APIC ID */
260 processor->lapic_flags & ACPI_MADT_ENABLED); /* Enabled? */
266 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
267 const unsigned long end)
269 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
271 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
273 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
276 acpi_lapic_addr = lapic_addr_ovr->address;
282 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
284 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
286 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
288 if (BAD_MADT_ENTRY(lapic_nmi, end))
291 acpi_table_print_madt_entry(header);
293 if (lapic_nmi->lint != 1)
294 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
299 #endif /*CONFIG_X86_LOCAL_APIC */
301 #ifdef CONFIG_X86_IO_APIC
304 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
306 struct acpi_madt_io_apic *ioapic = NULL;
308 ioapic = (struct acpi_madt_io_apic *)header;
310 if (BAD_MADT_ENTRY(ioapic, end))
313 acpi_table_print_madt_entry(header);
315 mp_register_ioapic(ioapic->id,
316 ioapic->address, ioapic->global_irq_base);
322 * Parse Interrupt Source Override for the ACPI SCI
324 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
326 if (trigger == 0) /* compatible SCI trigger is level */
329 if (polarity == 0) /* compatible SCI polarity is low */
332 /* Command-line over-ride via acpi_sci= */
333 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
334 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
336 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
337 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
340 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
341 * If GSI is < 16, this will update its flags,
342 * else it will create a new mp_irqs[] entry.
344 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
347 * stash over-ride to indicate we've been here
348 * and for later update of acpi_gbl_FADT
350 acpi_sci_override_gsi = gsi;
355 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
356 const unsigned long end)
358 struct acpi_madt_interrupt_override *intsrc = NULL;
360 intsrc = (struct acpi_madt_interrupt_override *)header;
362 if (BAD_MADT_ENTRY(intsrc, end))
365 acpi_table_print_madt_entry(header);
367 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
368 acpi_sci_ioapic_setup(intsrc->global_irq,
369 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
370 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
374 if (acpi_skip_timer_override &&
375 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
376 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
380 mp_override_legacy_irq(intsrc->source_irq,
381 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
382 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
389 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
391 struct acpi_madt_nmi_source *nmi_src = NULL;
393 nmi_src = (struct acpi_madt_nmi_source *)header;
395 if (BAD_MADT_ENTRY(nmi_src, end))
398 acpi_table_print_madt_entry(header);
400 /* TBD: Support nimsrc entries? */
405 #endif /* CONFIG_X86_IO_APIC */
408 * acpi_pic_sci_set_trigger()
410 * use ELCR to set PIC-mode trigger type for SCI
412 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
413 * it may require Edge Trigger -- use "acpi_sci=edge"
415 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
416 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
417 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
418 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
421 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
423 unsigned int mask = 1 << irq;
424 unsigned int old, new;
426 /* Real old ELCR mask */
427 old = inb(0x4d0) | (inb(0x4d1) << 8);
430 * If we use ACPI to set PCI IRQs, then we should clear ELCR
431 * since we will set it correctly as we enable the PCI irq
434 new = acpi_noirq ? old : 0;
437 * Update SCI information in the ELCR, it isn't in the PCI
441 case 1: /* Edge - clear */
444 case 3: /* Level - set */
452 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
454 outb(new >> 8, 0x4d1);
457 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
464 * success: return IRQ number (>=0)
465 * failure: return < 0
467 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
470 unsigned int plat_gsi = gsi;
474 * Make sure all (legacy) PCI IRQs are set as level-triggered.
476 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
477 extern void eisa_set_level_irq(unsigned int irq);
479 if (triggering == ACPI_LEVEL_SENSITIVE)
480 eisa_set_level_irq(gsi);
484 #ifdef CONFIG_X86_IO_APIC
485 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
486 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
489 acpi_gsi_to_irq(plat_gsi, &irq);
493 EXPORT_SYMBOL(acpi_register_gsi);
496 * ACPI based hotplug support for CPU
498 #ifdef CONFIG_ACPI_HOTPLUG_CPU
499 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
501 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
502 union acpi_object *obj;
503 struct acpi_madt_local_apic *lapic;
504 cpumask_t tmp_map, new_map;
508 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
511 if (!buffer.length || !buffer.pointer)
514 obj = buffer.pointer;
515 if (obj->type != ACPI_TYPE_BUFFER ||
516 obj->buffer.length < sizeof(*lapic)) {
517 kfree(buffer.pointer);
521 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
523 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
524 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
525 kfree(buffer.pointer);
531 kfree(buffer.pointer);
532 buffer.length = ACPI_ALLOCATE_BUFFER;
533 buffer.pointer = NULL;
535 tmp_map = cpu_present_map;
536 mp_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
539 * If mp_register_lapic successfully generates a new logical cpu
540 * number, then the following will get us exactly what was mapped
542 cpus_andnot(new_map, cpu_present_map, tmp_map);
543 if (cpus_empty(new_map)) {
544 printk ("Unable to map lapic to logical cpu number\n");
548 cpu = first_cpu(new_map);
554 EXPORT_SYMBOL(acpi_map_lsapic);
556 int acpi_unmap_lsapic(int cpu)
558 per_cpu(x86_cpu_to_apicid, cpu) = -1;
559 cpu_clear(cpu, cpu_present_map);
565 EXPORT_SYMBOL(acpi_unmap_lsapic);
566 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
568 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
574 EXPORT_SYMBOL(acpi_register_ioapic);
576 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
582 EXPORT_SYMBOL(acpi_unregister_ioapic);
584 static int __init acpi_parse_sbf(struct acpi_table_header *table)
586 struct acpi_table_boot *sb;
588 sb = (struct acpi_table_boot *)table;
590 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
594 sbf_port = sb->cmos_index; /* Save CMOS port */
599 #ifdef CONFIG_HPET_TIMER
600 #include <asm/hpet.h>
602 static struct __initdata resource *hpet_res;
604 static int __init acpi_parse_hpet(struct acpi_table_header *table)
606 struct acpi_table_hpet *hpet_tbl;
608 hpet_tbl = (struct acpi_table_hpet *)table;
610 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
614 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
615 printk(KERN_WARNING PREFIX "HPET timers must be located in "
620 hpet_address = hpet_tbl->address.address;
623 * Some broken BIOSes advertise HPET at 0x0. We really do not
624 * want to allocate a resource there.
627 printk(KERN_WARNING PREFIX
628 "HPET id: %#x base: %#lx is invalid\n",
629 hpet_tbl->id, hpet_address);
634 * Some even more broken BIOSes advertise HPET at
635 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
638 if (hpet_address == 0xfed0000000000000UL) {
639 if (!hpet_force_user) {
640 printk(KERN_WARNING PREFIX "HPET id: %#x "
641 "base: 0xfed0000000000000 is bogus\n "
642 "try hpet=force on the kernel command line to "
643 "fix it up to 0xfed00000.\n", hpet_tbl->id);
647 printk(KERN_WARNING PREFIX
648 "HPET id: %#x base: 0xfed0000000000000 fixed up "
649 "to 0xfed00000.\n", hpet_tbl->id);
653 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
654 hpet_tbl->id, hpet_address);
657 * Allocate and initialize the HPET firmware resource for adding into
658 * the resource tree during the lateinit timeframe.
660 #define HPET_RESOURCE_NAME_SIZE 9
661 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
666 memset(hpet_res, 0, sizeof(*hpet_res));
667 hpet_res->name = (void *)&hpet_res[1];
668 hpet_res->flags = IORESOURCE_MEM;
669 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
672 hpet_res->start = hpet_address;
673 hpet_res->end = hpet_address + (1 * 1024) - 1;
679 * hpet_insert_resource inserts the HPET resources used into the resource
682 static __init int hpet_insert_resource(void)
687 return insert_resource(&iomem_resource, hpet_res);
690 late_initcall(hpet_insert_resource);
693 #define acpi_parse_hpet NULL
696 static int __init acpi_parse_fadt(struct acpi_table_header *table)
699 #ifdef CONFIG_X86_PM_TIMER
700 /* detect the location of the ACPI PM Timer */
701 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
703 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
704 ACPI_ADR_SPACE_SYSTEM_IO)
707 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
709 * "X" fields are optional extensions to the original V1.0
710 * fields, so we must selectively expand V1.0 fields if the
711 * corresponding X field is zero.
714 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
717 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
720 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
726 #ifdef CONFIG_X86_LOCAL_APIC
728 * Parse LAPIC entries in MADT
729 * returns 0 on success, < 0 on error
731 static int __init acpi_parse_madt_lapic_entries(void)
739 * Note that the LAPIC address is obtained from the MADT (32-bit value)
740 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
744 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
745 acpi_parse_lapic_addr_ovr, 0);
747 printk(KERN_ERR PREFIX
748 "Error parsing LAPIC address override entry\n");
752 mp_register_lapic_address(acpi_lapic_addr);
754 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, acpi_parse_lapic,
757 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
758 /* TBD: Cleanup to allow fallback to MPS */
760 } else if (count < 0) {
761 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
762 /* TBD: Cleanup to allow fallback to MPS */
767 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
769 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
770 /* TBD: Cleanup to allow fallback to MPS */
775 #endif /* CONFIG_X86_LOCAL_APIC */
777 #ifdef CONFIG_X86_IO_APIC
779 * Parse IOAPIC related entries in MADT
780 * returns 0 on success, < 0 on error
782 static int __init acpi_parse_madt_ioapic_entries(void)
787 * ACPI interpreter is required to complete interrupt setup,
788 * so if it is off, don't enumerate the io-apics with ACPI.
789 * If MPS is present, it will handle them,
790 * otherwise the system will stay in PIC mode
792 if (acpi_disabled || acpi_noirq) {
800 * if "noapic" boot option, don't look for IO-APICs
802 if (skip_ioapic_setup) {
803 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
804 "due to 'noapic' option.\n");
809 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
812 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
814 } else if (count < 0) {
815 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
820 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
823 printk(KERN_ERR PREFIX
824 "Error parsing interrupt source overrides entry\n");
825 /* TBD: Cleanup to allow fallback to MPS */
830 * If BIOS did not supply an INT_SRC_OVR for the SCI
831 * pretend we got one so we can set the SCI flags.
833 if (!acpi_sci_override_gsi)
834 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
836 /* Fill in identity legacy mapings where no override */
837 mp_config_acpi_legacy_irqs();
840 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
843 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
844 /* TBD: Cleanup to allow fallback to MPS */
851 static inline int acpi_parse_madt_ioapic_entries(void)
855 #endif /* !CONFIG_X86_IO_APIC */
857 static void __init acpi_process_madt(void)
859 #ifdef CONFIG_X86_LOCAL_APIC
862 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
865 * Parse MADT LAPIC entries
867 error = acpi_parse_madt_lapic_entries();
871 #ifdef CONFIG_X86_GENERICARCH
872 generic_bigsmp_probe();
875 * Parse MADT IO-APIC entries
877 error = acpi_parse_madt_ioapic_entries();
879 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
880 acpi_irq_balance_set(NULL);
883 smp_found_config = 1;
884 setup_apic_routing();
887 if (error == -EINVAL) {
889 * Dell Precision Workstation 410, 610 come here.
891 printk(KERN_ERR PREFIX
892 "Invalid BIOS MADT, disabling ACPI\n");
902 static int __init disable_acpi_irq(const struct dmi_system_id *d)
905 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
912 static int __init disable_acpi_pci(const struct dmi_system_id *d)
915 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
922 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
925 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
929 "Warning: DMI blacklist says broken, but acpi forced\n");
935 * Limit ACPI to CPU enumeration for HT
937 static int __init force_acpi_ht(const struct dmi_system_id *d)
940 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
946 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
952 * If your system is blacklisted here, but you find that acpi=force
953 * works for you, please contact acpi-devel@sourceforge.net
955 static struct dmi_system_id __initdata acpi_dmi_table[] = {
957 * Boxes that need ACPI disabled
960 .callback = dmi_disable_acpi,
961 .ident = "IBM Thinkpad",
963 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
964 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
969 * Boxes that need acpi=ht
972 .callback = force_acpi_ht,
973 .ident = "FSC Primergy T850",
975 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
976 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
980 .callback = force_acpi_ht,
981 .ident = "HP VISUALIZE NT Workstation",
983 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
984 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
988 .callback = force_acpi_ht,
989 .ident = "Compaq Workstation W8000",
991 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
992 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
996 .callback = force_acpi_ht,
997 .ident = "ASUS P4B266",
999 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1000 DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1004 .callback = force_acpi_ht,
1005 .ident = "ASUS P2B-DS",
1007 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1008 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1012 .callback = force_acpi_ht,
1013 .ident = "ASUS CUR-DLS",
1015 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1016 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1020 .callback = force_acpi_ht,
1021 .ident = "ABIT i440BX-W83977",
1023 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1024 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1028 .callback = force_acpi_ht,
1029 .ident = "IBM Bladecenter",
1031 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1032 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1036 .callback = force_acpi_ht,
1037 .ident = "IBM eServer xSeries 360",
1039 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1040 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1044 .callback = force_acpi_ht,
1045 .ident = "IBM eserver xSeries 330",
1047 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1048 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1052 .callback = force_acpi_ht,
1053 .ident = "IBM eserver xSeries 440",
1055 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1056 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1061 * Boxes that need ACPI PCI IRQ routing disabled
1064 .callback = disable_acpi_irq,
1065 .ident = "ASUS A7V",
1067 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1068 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1069 /* newer BIOS, Revision 1011, does work */
1070 DMI_MATCH(DMI_BIOS_VERSION,
1071 "ASUS A7V ACPI BIOS Revision 1007"),
1076 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1077 * for LPC bridge, which is needed for the PCI
1078 * interrupt links to work. DSDT fix is in bug 5966.
1079 * 2645, 2646 model numbers are shared with 600/600E/600X
1081 .callback = disable_acpi_irq,
1082 .ident = "IBM Thinkpad 600 Series 2645",
1084 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1085 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1089 .callback = disable_acpi_irq,
1090 .ident = "IBM Thinkpad 600 Series 2646",
1092 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1093 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1097 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1100 .callback = disable_acpi_pci,
1101 .ident = "ASUS PR-DLS",
1103 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1104 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1105 DMI_MATCH(DMI_BIOS_VERSION,
1106 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1107 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1111 .callback = disable_acpi_pci,
1112 .ident = "Acer TravelMate 36x Laptop",
1114 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1115 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1121 #endif /* __i386__ */
1124 * acpi_boot_table_init() and acpi_boot_init()
1125 * called from setup_arch(), always.
1126 * 1. checksums all tables
1127 * 2. enumerates lapics
1128 * 3. enumerates io-apics
1130 * acpi_table_init() is separate to allow reading SRAT without
1131 * other side effects.
1133 * side effects of acpi_boot_init:
1134 * acpi_lapic = 1 if LAPIC found
1135 * acpi_ioapic = 1 if IOAPIC found
1136 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1137 * if acpi_blacklisted() acpi_disabled = 1;
1138 * acpi_irq_model=...
1141 * return value: (currently ignored)
1146 int __init acpi_boot_table_init(void)
1151 dmi_check_system(acpi_dmi_table);
1155 * If acpi_disabled, bail out
1156 * One exception: acpi=ht continues far enough to enumerate LAPICs
1158 if (acpi_disabled && !acpi_ht)
1162 * Initialize the ACPI boot-time table parser.
1164 error = acpi_table_init();
1170 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1173 * blacklist may disable ACPI entirely
1175 error = acpi_blacklisted();
1178 printk(KERN_WARNING PREFIX "acpi=force override\n");
1180 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1189 int __init acpi_boot_init(void)
1192 * If acpi_disabled, bail out
1193 * One exception: acpi=ht continues far enough to enumerate LAPICs
1195 if (acpi_disabled && !acpi_ht)
1198 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1201 * set sci_int and PM timer address
1203 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1206 * Process the Multiple APIC Description Table (MADT), if present
1208 acpi_process_madt();
1210 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1215 static int __init parse_acpi(char *arg)
1220 /* "acpi=off" disables both ACPI table parsing and interpreter */
1221 if (strcmp(arg, "off") == 0) {
1224 /* acpi=force to over-ride black-list */
1225 else if (strcmp(arg, "force") == 0) {
1230 /* acpi=strict disables out-of-spec workarounds */
1231 else if (strcmp(arg, "strict") == 0) {
1234 /* Limit ACPI just to boot-time to enable HT */
1235 else if (strcmp(arg, "ht") == 0) {
1240 /* "acpi=noirq" disables ACPI interrupt routing */
1241 else if (strcmp(arg, "noirq") == 0) {
1244 /* Core will printk when we return error. */
1249 early_param("acpi", parse_acpi);
1251 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1252 static int __init parse_pci(char *arg)
1254 if (arg && strcmp(arg, "noacpi") == 0)
1258 early_param("pci", parse_pci);
1260 #ifdef CONFIG_X86_IO_APIC
1261 static int __init parse_acpi_skip_timer_override(char *arg)
1263 acpi_skip_timer_override = 1;
1266 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1268 static int __init parse_acpi_use_timer_override(char *arg)
1270 acpi_use_timer_override = 1;
1273 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1274 #endif /* CONFIG_X86_IO_APIC */
1276 static int __init setup_acpi_sci(char *s)
1280 if (!strcmp(s, "edge"))
1281 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1282 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1283 else if (!strcmp(s, "level"))
1284 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1285 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1286 else if (!strcmp(s, "high"))
1287 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1288 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1289 else if (!strcmp(s, "low"))
1290 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1291 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1296 early_param("acpi_sci", setup_acpi_sci);
1298 int __acpi_acquire_global_lock(unsigned int *lock)
1300 unsigned int old, new, val;
1303 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1304 val = cmpxchg(lock, old, new);
1305 } while (unlikely (val != old));
1306 return (new < 3) ? -1 : 0;
1309 int __acpi_release_global_lock(unsigned int *lock)
1311 unsigned int old, new, val;
1315 val = cmpxchg(lock, old, new);
1316 } while (unlikely (val != old));