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>
36 #include <linux/pci.h>
38 #include <asm/pgtable.h>
39 #include <asm/io_apic.h>
42 #include <asm/mpspec.h>
45 static int __initdata acpi_force = 0;
48 int acpi_disabled = 0;
50 int acpi_disabled = 1;
52 EXPORT_SYMBOL(acpi_disabled);
55 # include <asm/proto.h>
58 #define BAD_MADT_ENTRY(entry, end) ( \
59 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
60 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
62 #define PREFIX "ACPI: "
64 int acpi_noirq; /* skip ACPI IRQ initialization */
65 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
66 EXPORT_SYMBOL(acpi_pci_disabled);
67 int acpi_ht __initdata = 1; /* enable HT */
73 u8 acpi_sci_flags __initdata;
74 int acpi_sci_override_gsi __initdata;
75 int acpi_skip_timer_override __initdata;
76 int acpi_use_timer_override __initdata;
78 #ifdef CONFIG_X86_LOCAL_APIC
79 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
82 #ifndef __HAVE_ARCH_CMPXCHG
83 #warning ACPI uses CMPXCHG, i486 and later hardware
86 /* --------------------------------------------------------------------------
87 Boot-time Configuration
88 -------------------------------------------------------------------------- */
91 * The default interrupt routing model is PIC (8259). This gets
92 * overridden if IOAPICs are enumerated (below).
94 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
98 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
99 * to map the target physical address. The problem is that set_fixmap()
100 * provides a single page, and it is possible that the page is not
102 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
103 * i.e. until the next __va_range() call.
105 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
106 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
107 * count idx down while incrementing the phys address.
109 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
115 return early_ioremap(phys, size);
117 void __init __acpi_unmap_table(char *map, unsigned long size)
122 early_iounmap(map, size);
125 #ifdef CONFIG_PCI_MMCONFIG
127 static int acpi_mcfg_64bit_base_addr __initdata = FALSE;
129 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
130 struct acpi_mcfg_allocation *pci_mmcfg_config;
131 int pci_mmcfg_config_num;
133 static int __init acpi_mcfg_oem_check(struct acpi_table_mcfg *mcfg)
135 if (!strcmp(mcfg->header.oem_id, "SGI"))
136 acpi_mcfg_64bit_base_addr = TRUE;
141 int __init acpi_parse_mcfg(struct acpi_table_header *header)
143 struct acpi_table_mcfg *mcfg;
150 mcfg = (struct acpi_table_mcfg *)header;
152 /* how many config structures do we have */
153 pci_mmcfg_config_num = 0;
154 i = header->length - sizeof(struct acpi_table_mcfg);
155 while (i >= sizeof(struct acpi_mcfg_allocation)) {
156 ++pci_mmcfg_config_num;
157 i -= sizeof(struct acpi_mcfg_allocation);
159 if (pci_mmcfg_config_num == 0) {
160 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
164 config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
165 pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
166 if (!pci_mmcfg_config) {
167 printk(KERN_WARNING PREFIX
168 "No memory for MCFG config tables\n");
172 memcpy(pci_mmcfg_config, &mcfg[1], config_size);
174 acpi_mcfg_oem_check(mcfg);
176 for (i = 0; i < pci_mmcfg_config_num; ++i) {
177 if ((pci_mmcfg_config[i].address > 0xFFFFFFFF) &&
178 !acpi_mcfg_64bit_base_addr) {
179 printk(KERN_ERR PREFIX
180 "MMCONFIG not in low 4GB of memory\n");
181 kfree(pci_mmcfg_config);
182 pci_mmcfg_config_num = 0;
189 #endif /* CONFIG_PCI_MMCONFIG */
191 #ifdef CONFIG_X86_LOCAL_APIC
192 static int __init acpi_parse_madt(struct acpi_table_header *table)
194 struct acpi_table_madt *madt = NULL;
199 madt = (struct acpi_table_madt *)table;
201 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
206 acpi_lapic_addr = (u64) madt->address;
208 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
212 default_acpi_madt_oem_check(madt->header.oem_id,
213 madt->header.oem_table_id);
218 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
220 unsigned int ver = 0;
227 if (boot_cpu_physical_apicid != -1U)
228 ver = apic_version[boot_cpu_physical_apicid];
230 generic_processor_info(id, ver);
234 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
236 struct acpi_madt_local_x2apic *processor = NULL;
238 processor = (struct acpi_madt_local_x2apic *)header;
240 if (BAD_MADT_ENTRY(processor, end))
243 acpi_table_print_madt_entry(header);
245 #ifdef CONFIG_X86_X2APIC
247 * We need to register disabled CPU as well to permit
248 * counting disabled CPUs. This allows us to size
249 * cpus_possible_map more accurately, to permit
250 * to not preallocating memory for all NR_CPUS
251 * when we use CPU hotplug.
253 acpi_register_lapic(processor->local_apic_id, /* APIC ID */
254 processor->lapic_flags & ACPI_MADT_ENABLED);
256 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
263 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
265 struct acpi_madt_local_apic *processor = NULL;
267 processor = (struct acpi_madt_local_apic *)header;
269 if (BAD_MADT_ENTRY(processor, end))
272 acpi_table_print_madt_entry(header);
275 * We need to register disabled CPU as well to permit
276 * counting disabled CPUs. This allows us to size
277 * cpus_possible_map more accurately, to permit
278 * to not preallocating memory for all NR_CPUS
279 * when we use CPU hotplug.
281 acpi_register_lapic(processor->id, /* APIC ID */
282 processor->lapic_flags & ACPI_MADT_ENABLED);
288 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
290 struct acpi_madt_local_sapic *processor = NULL;
292 processor = (struct acpi_madt_local_sapic *)header;
294 if (BAD_MADT_ENTRY(processor, end))
297 acpi_table_print_madt_entry(header);
299 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
300 processor->lapic_flags & ACPI_MADT_ENABLED);
306 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
307 const unsigned long end)
309 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
311 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
313 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
316 acpi_lapic_addr = lapic_addr_ovr->address;
322 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
323 const unsigned long end)
325 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
327 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
329 if (BAD_MADT_ENTRY(x2apic_nmi, end))
332 acpi_table_print_madt_entry(header);
334 if (x2apic_nmi->lint != 1)
335 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
341 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
343 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
345 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
347 if (BAD_MADT_ENTRY(lapic_nmi, end))
350 acpi_table_print_madt_entry(header);
352 if (lapic_nmi->lint != 1)
353 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
358 #endif /*CONFIG_X86_LOCAL_APIC */
360 #ifdef CONFIG_X86_IO_APIC
363 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
365 struct acpi_madt_io_apic *ioapic = NULL;
367 ioapic = (struct acpi_madt_io_apic *)header;
369 if (BAD_MADT_ENTRY(ioapic, end))
372 acpi_table_print_madt_entry(header);
374 mp_register_ioapic(ioapic->id,
375 ioapic->address, ioapic->global_irq_base);
381 * Parse Interrupt Source Override for the ACPI SCI
383 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
385 if (trigger == 0) /* compatible SCI trigger is level */
388 if (polarity == 0) /* compatible SCI polarity is low */
391 /* Command-line over-ride via acpi_sci= */
392 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
393 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
395 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
396 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
399 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
400 * If GSI is < 16, this will update its flags,
401 * else it will create a new mp_irqs[] entry.
403 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
406 * stash over-ride to indicate we've been here
407 * and for later update of acpi_gbl_FADT
409 acpi_sci_override_gsi = gsi;
414 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
415 const unsigned long end)
417 struct acpi_madt_interrupt_override *intsrc = NULL;
419 intsrc = (struct acpi_madt_interrupt_override *)header;
421 if (BAD_MADT_ENTRY(intsrc, end))
424 acpi_table_print_madt_entry(header);
426 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
427 acpi_sci_ioapic_setup(intsrc->global_irq,
428 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
429 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
433 if (acpi_skip_timer_override &&
434 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
435 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
439 mp_override_legacy_irq(intsrc->source_irq,
440 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
441 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
448 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
450 struct acpi_madt_nmi_source *nmi_src = NULL;
452 nmi_src = (struct acpi_madt_nmi_source *)header;
454 if (BAD_MADT_ENTRY(nmi_src, end))
457 acpi_table_print_madt_entry(header);
459 /* TBD: Support nimsrc entries? */
464 #endif /* CONFIG_X86_IO_APIC */
467 * acpi_pic_sci_set_trigger()
469 * use ELCR to set PIC-mode trigger type for SCI
471 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
472 * it may require Edge Trigger -- use "acpi_sci=edge"
474 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
475 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
476 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
477 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
480 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
482 unsigned int mask = 1 << irq;
483 unsigned int old, new;
485 /* Real old ELCR mask */
486 old = inb(0x4d0) | (inb(0x4d1) << 8);
489 * If we use ACPI to set PCI IRQs, then we should clear ELCR
490 * since we will set it correctly as we enable the PCI irq
493 new = acpi_noirq ? old : 0;
496 * Update SCI information in the ELCR, it isn't in the PCI
500 case 1: /* Edge - clear */
503 case 3: /* Level - set */
511 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
513 outb(new >> 8, 0x4d1);
516 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
523 * success: return IRQ number (>=0)
524 * failure: return < 0
526 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
529 unsigned int plat_gsi = gsi;
533 * Make sure all (legacy) PCI IRQs are set as level-triggered.
535 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
536 if (trigger == ACPI_LEVEL_SENSITIVE)
537 eisa_set_level_irq(gsi);
541 #ifdef CONFIG_X86_IO_APIC
542 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
543 plat_gsi = mp_register_gsi(dev, gsi, trigger, polarity);
546 acpi_gsi_to_irq(plat_gsi, &irq);
551 * ACPI based hotplug support for CPU
553 #ifdef CONFIG_ACPI_HOTPLUG_CPU
555 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
557 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
558 union acpi_object *obj;
559 struct acpi_madt_local_apic *lapic;
560 cpumask_var_t tmp_map, new_map;
563 int retval = -ENOMEM;
565 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
568 if (!buffer.length || !buffer.pointer)
571 obj = buffer.pointer;
572 if (obj->type != ACPI_TYPE_BUFFER ||
573 obj->buffer.length < sizeof(*lapic)) {
574 kfree(buffer.pointer);
578 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
580 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
581 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
582 kfree(buffer.pointer);
588 kfree(buffer.pointer);
589 buffer.length = ACPI_ALLOCATE_BUFFER;
590 buffer.pointer = NULL;
592 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
595 if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
598 cpumask_copy(tmp_map, cpu_present_mask);
599 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
602 * If mp_register_lapic successfully generates a new logical cpu
603 * number, then the following will get us exactly what was mapped
605 cpumask_andnot(new_map, cpu_present_mask, tmp_map);
606 if (cpumask_empty(new_map)) {
607 printk ("Unable to map lapic to logical cpu number\n");
612 cpu = cpumask_first(new_map);
618 free_cpumask_var(new_map);
620 free_cpumask_var(tmp_map);
625 /* wrapper to silence section mismatch warning */
626 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
628 return _acpi_map_lsapic(handle, pcpu);
630 EXPORT_SYMBOL(acpi_map_lsapic);
632 int acpi_unmap_lsapic(int cpu)
634 per_cpu(x86_cpu_to_apicid, cpu) = -1;
635 set_cpu_present(cpu, false);
641 EXPORT_SYMBOL(acpi_unmap_lsapic);
642 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
644 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
650 EXPORT_SYMBOL(acpi_register_ioapic);
652 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
658 EXPORT_SYMBOL(acpi_unregister_ioapic);
660 static int __init acpi_parse_sbf(struct acpi_table_header *table)
662 struct acpi_table_boot *sb;
664 sb = (struct acpi_table_boot *)table;
666 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
670 sbf_port = sb->cmos_index; /* Save CMOS port */
675 #ifdef CONFIG_HPET_TIMER
676 #include <asm/hpet.h>
678 static struct __initdata resource *hpet_res;
680 static int __init acpi_parse_hpet(struct acpi_table_header *table)
682 struct acpi_table_hpet *hpet_tbl;
684 hpet_tbl = (struct acpi_table_hpet *)table;
686 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
690 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
691 printk(KERN_WARNING PREFIX "HPET timers must be located in "
696 hpet_address = hpet_tbl->address.address;
699 * Some broken BIOSes advertise HPET at 0x0. We really do not
700 * want to allocate a resource there.
703 printk(KERN_WARNING PREFIX
704 "HPET id: %#x base: %#lx is invalid\n",
705 hpet_tbl->id, hpet_address);
710 * Some even more broken BIOSes advertise HPET at
711 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
714 if (hpet_address == 0xfed0000000000000UL) {
715 if (!hpet_force_user) {
716 printk(KERN_WARNING PREFIX "HPET id: %#x "
717 "base: 0xfed0000000000000 is bogus\n "
718 "try hpet=force on the kernel command line to "
719 "fix it up to 0xfed00000.\n", hpet_tbl->id);
723 printk(KERN_WARNING PREFIX
724 "HPET id: %#x base: 0xfed0000000000000 fixed up "
725 "to 0xfed00000.\n", hpet_tbl->id);
729 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
730 hpet_tbl->id, hpet_address);
733 * Allocate and initialize the HPET firmware resource for adding into
734 * the resource tree during the lateinit timeframe.
736 #define HPET_RESOURCE_NAME_SIZE 9
737 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
739 hpet_res->name = (void *)&hpet_res[1];
740 hpet_res->flags = IORESOURCE_MEM;
741 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
744 hpet_res->start = hpet_address;
745 hpet_res->end = hpet_address + (1 * 1024) - 1;
751 * hpet_insert_resource inserts the HPET resources used into the resource
754 static __init int hpet_insert_resource(void)
759 return insert_resource(&iomem_resource, hpet_res);
762 late_initcall(hpet_insert_resource);
765 #define acpi_parse_hpet NULL
768 static int __init acpi_parse_fadt(struct acpi_table_header *table)
771 #ifdef CONFIG_X86_PM_TIMER
772 /* detect the location of the ACPI PM Timer */
773 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
775 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
776 ACPI_ADR_SPACE_SYSTEM_IO)
779 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
781 * "X" fields are optional extensions to the original V1.0
782 * fields, so we must selectively expand V1.0 fields if the
783 * corresponding X field is zero.
786 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
789 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
792 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
798 #ifdef CONFIG_X86_LOCAL_APIC
800 * Parse LAPIC entries in MADT
801 * returns 0 on success, < 0 on error
804 static void __init acpi_register_lapic_address(unsigned long address)
806 mp_lapic_addr = address;
808 set_fixmap_nocache(FIX_APIC_BASE, address);
809 if (boot_cpu_physical_apicid == -1U) {
810 boot_cpu_physical_apicid = read_apic_id();
811 apic_version[boot_cpu_physical_apicid] =
812 GET_APIC_VERSION(apic_read(APIC_LVR));
816 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
824 * Note that the LAPIC address is obtained from the MADT (32-bit value)
825 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
829 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
830 acpi_parse_lapic_addr_ovr, 0);
832 printk(KERN_ERR PREFIX
833 "Error parsing LAPIC address override entry\n");
837 acpi_register_lapic_address(acpi_lapic_addr);
842 static int __init acpi_parse_madt_lapic_entries(void)
851 * Note that the LAPIC address is obtained from the MADT (32-bit value)
852 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
856 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
857 acpi_parse_lapic_addr_ovr, 0);
859 printk(KERN_ERR PREFIX
860 "Error parsing LAPIC address override entry\n");
864 acpi_register_lapic_address(acpi_lapic_addr);
866 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
867 acpi_parse_sapic, MAX_APICS);
870 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
871 acpi_parse_x2apic, MAX_APICS);
872 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
873 acpi_parse_lapic, MAX_APICS);
875 if (!count && !x2count) {
876 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
877 /* TBD: Cleanup to allow fallback to MPS */
879 } else if (count < 0 || x2count < 0) {
880 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
881 /* TBD: Cleanup to allow fallback to MPS */
886 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
887 acpi_parse_x2apic_nmi, 0);
889 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
890 if (count < 0 || x2count < 0) {
891 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
892 /* TBD: Cleanup to allow fallback to MPS */
897 #endif /* CONFIG_X86_LOCAL_APIC */
899 #ifdef CONFIG_X86_IO_APIC
902 #ifdef CONFIG_X86_ES7000
903 extern int es7000_plat;
909 } mp_ioapic_routing[MAX_IO_APICS];
911 int mp_find_ioapic(int gsi)
915 /* Find the IOAPIC that manages this GSI. */
916 for (i = 0; i < nr_ioapics; i++) {
917 if ((gsi >= mp_ioapic_routing[i].gsi_base)
918 && (gsi <= mp_ioapic_routing[i].gsi_end))
922 printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
926 int mp_find_ioapic_pin(int ioapic, int gsi)
928 if (WARN_ON(ioapic == -1))
930 if (WARN_ON(gsi > mp_ioapic_routing[ioapic].gsi_end))
933 return gsi - mp_ioapic_routing[ioapic].gsi_base;
936 static u8 __init uniq_ioapic_id(u8 id)
939 if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
940 !APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
941 return io_apic_get_unique_id(nr_ioapics, id);
946 DECLARE_BITMAP(used, 256);
947 bitmap_zero(used, 256);
948 for (i = 0; i < nr_ioapics; i++) {
949 struct mpc_ioapic *ia = &mp_ioapics[i];
950 __set_bit(ia->apicid, used);
952 if (!test_bit(id, used))
954 return find_first_zero_bit(used, 256);
958 static int bad_ioapic(unsigned long address)
960 if (nr_ioapics >= MAX_IO_APICS) {
961 printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
962 "(found %d)\n", MAX_IO_APICS, nr_ioapics);
963 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
966 printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
967 " found in table, skipping!\n");
973 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
977 if (bad_ioapic(address))
982 mp_ioapics[idx].type = MP_IOAPIC;
983 mp_ioapics[idx].flags = MPC_APIC_USABLE;
984 mp_ioapics[idx].apicaddr = address;
986 set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
987 mp_ioapics[idx].apicid = uniq_ioapic_id(id);
988 mp_ioapics[idx].apicver = io_apic_get_version(idx);
991 * Build basic GSI lookup table to facilitate gsi->io_apic lookups
992 * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
994 mp_ioapic_routing[idx].gsi_base = gsi_base;
995 mp_ioapic_routing[idx].gsi_end = gsi_base +
996 io_apic_get_redir_entries(idx);
998 printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%x, "
999 "GSI %d-%d\n", idx, mp_ioapics[idx].apicid,
1000 mp_ioapics[idx].apicver, mp_ioapics[idx].apicaddr,
1001 mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end);
1006 int __init acpi_probe_gsi(void)
1019 for (idx = 0; idx < nr_ioapics; idx++) {
1020 gsi = mp_ioapic_routing[idx].gsi_end;
1029 static void assign_to_mp_irq(struct mpc_intsrc *m,
1030 struct mpc_intsrc *mp_irq)
1032 memcpy(mp_irq, m, sizeof(struct mpc_intsrc));
1035 static int mp_irq_cmp(struct mpc_intsrc *mp_irq,
1036 struct mpc_intsrc *m)
1038 return memcmp(mp_irq, m, sizeof(struct mpc_intsrc));
1041 static void save_mp_irq(struct mpc_intsrc *m)
1045 for (i = 0; i < mp_irq_entries; i++) {
1046 if (!mp_irq_cmp(&mp_irqs[i], m))
1050 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
1051 if (++mp_irq_entries == MAX_IRQ_SOURCES)
1052 panic("Max # of irq sources exceeded!!\n");
1055 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
1059 struct mpc_intsrc mp_irq;
1062 * Convert 'gsi' to 'ioapic.pin'.
1064 ioapic = mp_find_ioapic(gsi);
1067 pin = mp_find_ioapic_pin(ioapic, gsi);
1070 * TBD: This check is for faulty timer entries, where the override
1071 * erroneously sets the trigger to level, resulting in a HUGE
1072 * increase of timer interrupts!
1074 if ((bus_irq == 0) && (trigger == 3))
1077 mp_irq.type = MP_INTSRC;
1078 mp_irq.irqtype = mp_INT;
1079 mp_irq.irqflag = (trigger << 2) | polarity;
1080 mp_irq.srcbus = MP_ISA_BUS;
1081 mp_irq.srcbusirq = bus_irq; /* IRQ */
1082 mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */
1083 mp_irq.dstirq = pin; /* INTIN# */
1085 save_mp_irq(&mp_irq);
1088 void __init mp_config_acpi_legacy_irqs(void)
1092 unsigned int dstapic;
1093 struct mpc_intsrc mp_irq;
1095 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
1097 * Fabricate the legacy ISA bus (bus #31).
1099 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1101 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1102 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1104 #ifdef CONFIG_X86_ES7000
1106 * Older generations of ES7000 have no legacy identity mappings
1108 if (es7000_plat == 1)
1113 * Locate the IOAPIC that manages the ISA IRQs (0-15).
1115 ioapic = mp_find_ioapic(0);
1118 dstapic = mp_ioapics[ioapic].apicid;
1121 * Use the default configuration for the IRQs 0-15. Unless
1122 * overridden by (MADT) interrupt source override entries.
1124 for (i = 0; i < 16; i++) {
1127 for (idx = 0; idx < mp_irq_entries; idx++) {
1128 struct mpc_intsrc *irq = mp_irqs + idx;
1130 /* Do we already have a mapping for this ISA IRQ? */
1131 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1134 /* Do we already have a mapping for this IOAPIC pin */
1135 if (irq->dstapic == dstapic && irq->dstirq == i)
1139 if (idx != mp_irq_entries) {
1140 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1141 continue; /* IRQ already used */
1144 mp_irq.type = MP_INTSRC;
1145 mp_irq.irqflag = 0; /* Conforming */
1146 mp_irq.srcbus = MP_ISA_BUS;
1147 mp_irq.dstapic = dstapic;
1148 mp_irq.irqtype = mp_INT;
1149 mp_irq.srcbusirq = i; /* Identity mapped */
1152 save_mp_irq(&mp_irq);
1156 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1159 #ifdef CONFIG_X86_MPPARSE
1160 struct mpc_intsrc mp_irq;
1161 struct pci_dev *pdev;
1162 unsigned char number;
1171 if (dev->bus != &pci_bus_type)
1174 pdev = to_pci_dev(dev);
1175 number = pdev->bus->number;
1176 devfn = pdev->devfn;
1178 /* print the entry should happen on mptable identically */
1179 mp_irq.type = MP_INTSRC;
1180 mp_irq.irqtype = mp_INT;
1181 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1182 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1183 mp_irq.srcbus = number;
1184 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1185 ioapic = mp_find_ioapic(gsi);
1186 mp_irq.dstapic = mp_ioapics[ioapic].apicid;
1187 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1189 save_mp_irq(&mp_irq);
1194 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1198 struct io_apic_irq_attr irq_attr;
1200 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1203 /* Don't set up the ACPI SCI because it's already set up */
1204 if (acpi_gbl_FADT.sci_interrupt == gsi)
1207 ioapic = mp_find_ioapic(gsi);
1209 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1213 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1215 #ifdef CONFIG_X86_32
1216 if (ioapic_renumber_irq)
1217 gsi = ioapic_renumber_irq(ioapic, gsi);
1220 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1221 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1222 "%d-%d\n", mp_ioapics[ioapic].apicid,
1227 if (enable_update_mptable)
1228 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1230 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1231 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1232 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1233 io_apic_set_pci_routing(dev, gsi, &irq_attr);
1239 * Parse IOAPIC related entries in MADT
1240 * returns 0 on success, < 0 on error
1242 static int __init acpi_parse_madt_ioapic_entries(void)
1247 * ACPI interpreter is required to complete interrupt setup,
1248 * so if it is off, don't enumerate the io-apics with ACPI.
1249 * If MPS is present, it will handle them,
1250 * otherwise the system will stay in PIC mode
1252 if (acpi_disabled || acpi_noirq) {
1260 * if "noapic" boot option, don't look for IO-APICs
1262 if (skip_ioapic_setup) {
1263 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1264 "due to 'noapic' option.\n");
1269 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1272 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1274 } else if (count < 0) {
1275 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1280 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1283 printk(KERN_ERR PREFIX
1284 "Error parsing interrupt source overrides entry\n");
1285 /* TBD: Cleanup to allow fallback to MPS */
1290 * If BIOS did not supply an INT_SRC_OVR for the SCI
1291 * pretend we got one so we can set the SCI flags.
1293 if (!acpi_sci_override_gsi)
1294 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1296 /* Fill in identity legacy mapings where no override */
1297 mp_config_acpi_legacy_irqs();
1300 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1303 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1304 /* TBD: Cleanup to allow fallback to MPS */
1311 static inline int acpi_parse_madt_ioapic_entries(void)
1315 #endif /* !CONFIG_X86_IO_APIC */
1317 static void __init early_acpi_process_madt(void)
1319 #ifdef CONFIG_X86_LOCAL_APIC
1322 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1325 * Parse MADT LAPIC entries
1327 error = early_acpi_parse_madt_lapic_addr_ovr();
1330 smp_found_config = 1;
1332 if (error == -EINVAL) {
1334 * Dell Precision Workstation 410, 610 come here.
1336 printk(KERN_ERR PREFIX
1337 "Invalid BIOS MADT, disabling ACPI\n");
1344 static void __init acpi_process_madt(void)
1346 #ifdef CONFIG_X86_LOCAL_APIC
1349 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1352 * Parse MADT LAPIC entries
1354 error = acpi_parse_madt_lapic_entries();
1358 #ifdef CONFIG_X86_BIGSMP
1359 generic_bigsmp_probe();
1362 * Parse MADT IO-APIC entries
1364 error = acpi_parse_madt_ioapic_entries();
1366 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1369 smp_found_config = 1;
1370 if (apic->setup_apic_routing)
1371 apic->setup_apic_routing();
1374 if (error == -EINVAL) {
1376 * Dell Precision Workstation 410, 610 come here.
1378 printk(KERN_ERR PREFIX
1379 "Invalid BIOS MADT, disabling ACPI\n");
1384 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1385 * In the event an MPS table was found, forget it.
1386 * Boot with "acpi=off" to use MPS on such a system.
1388 if (smp_found_config) {
1389 printk(KERN_WARNING PREFIX
1390 "No APIC-table, disabling MPS\n");
1391 smp_found_config = 0;
1396 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1397 * processors, where MPS only supports physical.
1399 if (acpi_lapic && acpi_ioapic)
1400 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1402 else if (acpi_lapic)
1403 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1404 "configuration information\n");
1409 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1412 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1419 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1422 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1429 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1432 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1436 "Warning: DMI blacklist says broken, but acpi forced\n");
1442 * Limit ACPI to CPU enumeration for HT
1444 static int __init force_acpi_ht(const struct dmi_system_id *d)
1447 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1453 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1459 * Force ignoring BIOS IRQ0 pin2 override
1461 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1464 * The ati_ixp4x0_rev() early PCI quirk should have set
1465 * the acpi_skip_timer_override flag already:
1467 if (!acpi_skip_timer_override) {
1468 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1469 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1471 acpi_skip_timer_override = 1;
1477 * If your system is blacklisted here, but you find that acpi=force
1478 * works for you, please contact linux-acpi@vger.kernel.org
1480 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1482 * Boxes that need ACPI disabled
1485 .callback = dmi_disable_acpi,
1486 .ident = "IBM Thinkpad",
1488 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1489 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1494 * Boxes that need acpi=ht
1497 .callback = force_acpi_ht,
1498 .ident = "FSC Primergy T850",
1500 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1501 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1505 .callback = force_acpi_ht,
1506 .ident = "HP VISUALIZE NT Workstation",
1508 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1509 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1513 .callback = force_acpi_ht,
1514 .ident = "Compaq Workstation W8000",
1516 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1517 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1521 .callback = force_acpi_ht,
1522 .ident = "ASUS P4B266",
1524 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1525 DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1529 .callback = force_acpi_ht,
1530 .ident = "ASUS P2B-DS",
1532 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1533 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1537 .callback = force_acpi_ht,
1538 .ident = "ASUS CUR-DLS",
1540 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1541 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1545 .callback = force_acpi_ht,
1546 .ident = "ABIT i440BX-W83977",
1548 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1549 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1553 .callback = force_acpi_ht,
1554 .ident = "IBM Bladecenter",
1556 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1557 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1561 .callback = force_acpi_ht,
1562 .ident = "IBM eServer xSeries 360",
1564 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1565 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1569 .callback = force_acpi_ht,
1570 .ident = "IBM eserver xSeries 330",
1572 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1573 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1577 .callback = force_acpi_ht,
1578 .ident = "IBM eserver xSeries 440",
1580 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1581 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1586 * Boxes that need ACPI PCI IRQ routing disabled
1589 .callback = disable_acpi_irq,
1590 .ident = "ASUS A7V",
1592 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1593 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1594 /* newer BIOS, Revision 1011, does work */
1595 DMI_MATCH(DMI_BIOS_VERSION,
1596 "ASUS A7V ACPI BIOS Revision 1007"),
1601 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1602 * for LPC bridge, which is needed for the PCI
1603 * interrupt links to work. DSDT fix is in bug 5966.
1604 * 2645, 2646 model numbers are shared with 600/600E/600X
1606 .callback = disable_acpi_irq,
1607 .ident = "IBM Thinkpad 600 Series 2645",
1609 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1610 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1614 .callback = disable_acpi_irq,
1615 .ident = "IBM Thinkpad 600 Series 2646",
1617 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1618 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1622 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1625 .callback = disable_acpi_pci,
1626 .ident = "ASUS PR-DLS",
1628 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1629 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1630 DMI_MATCH(DMI_BIOS_VERSION,
1631 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1632 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1636 .callback = disable_acpi_pci,
1637 .ident = "Acer TravelMate 36x Laptop",
1639 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1640 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1646 /* second table for DMI checks that should run after early-quirks */
1647 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1649 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1650 * which includes some code which overrides all temperature
1651 * trip points to 16C if the INTIN2 input of the I/O APIC
1652 * is enabled. This input is incorrectly designated the
1653 * ISA IRQ 0 via an interrupt source override even though
1654 * it is wired to the output of the master 8259A and INTIN0
1655 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1656 * override in that cases.
1659 .callback = dmi_ignore_irq0_timer_override,
1660 .ident = "HP nx6115 laptop",
1662 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1663 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1667 .callback = dmi_ignore_irq0_timer_override,
1668 .ident = "HP NX6125 laptop",
1670 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1671 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1675 .callback = dmi_ignore_irq0_timer_override,
1676 .ident = "HP NX6325 laptop",
1678 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1679 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1683 .callback = dmi_ignore_irq0_timer_override,
1684 .ident = "HP 6715b laptop",
1686 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1687 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1694 * acpi_boot_table_init() and acpi_boot_init()
1695 * called from setup_arch(), always.
1696 * 1. checksums all tables
1697 * 2. enumerates lapics
1698 * 3. enumerates io-apics
1700 * acpi_table_init() is separate to allow reading SRAT without
1701 * other side effects.
1703 * side effects of acpi_boot_init:
1704 * acpi_lapic = 1 if LAPIC found
1705 * acpi_ioapic = 1 if IOAPIC found
1706 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1707 * if acpi_blacklisted() acpi_disabled = 1;
1708 * acpi_irq_model=...
1711 * return value: (currently ignored)
1716 int __init acpi_boot_table_init(void)
1720 dmi_check_system(acpi_dmi_table);
1723 * If acpi_disabled, bail out
1724 * One exception: acpi=ht continues far enough to enumerate LAPICs
1726 if (acpi_disabled && !acpi_ht)
1730 * Initialize the ACPI boot-time table parser.
1732 error = acpi_table_init();
1738 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1741 * blacklist may disable ACPI entirely
1743 error = acpi_blacklisted();
1746 printk(KERN_WARNING PREFIX "acpi=force override\n");
1748 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1757 int __init early_acpi_boot_init(void)
1760 * If acpi_disabled, bail out
1761 * One exception: acpi=ht continues far enough to enumerate LAPICs
1763 if (acpi_disabled && !acpi_ht)
1767 * Process the Multiple APIC Description Table (MADT), if present
1769 early_acpi_process_madt();
1774 int __init acpi_boot_init(void)
1776 /* those are executed after early-quirks are executed */
1777 dmi_check_system(acpi_dmi_table_late);
1780 * If acpi_disabled, bail out
1781 * One exception: acpi=ht continues far enough to enumerate LAPICs
1783 if (acpi_disabled && !acpi_ht)
1786 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1789 * set sci_int and PM timer address
1791 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1794 * Process the Multiple APIC Description Table (MADT), if present
1796 acpi_process_madt();
1798 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1803 static int __init parse_acpi(char *arg)
1808 /* "acpi=off" disables both ACPI table parsing and interpreter */
1809 if (strcmp(arg, "off") == 0) {
1812 /* acpi=force to over-ride black-list */
1813 else if (strcmp(arg, "force") == 0) {
1818 /* acpi=strict disables out-of-spec workarounds */
1819 else if (strcmp(arg, "strict") == 0) {
1822 /* Limit ACPI just to boot-time to enable HT */
1823 else if (strcmp(arg, "ht") == 0) {
1828 /* acpi=rsdt use RSDT instead of XSDT */
1829 else if (strcmp(arg, "rsdt") == 0) {
1830 acpi_rsdt_forced = 1;
1832 /* "acpi=noirq" disables ACPI interrupt routing */
1833 else if (strcmp(arg, "noirq") == 0) {
1836 /* Core will printk when we return error. */
1841 early_param("acpi", parse_acpi);
1843 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1844 static int __init parse_pci(char *arg)
1846 if (arg && strcmp(arg, "noacpi") == 0)
1850 early_param("pci", parse_pci);
1852 int __init acpi_mps_check(void)
1854 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1855 /* mptable code is not built-in*/
1856 if (acpi_disabled || acpi_noirq) {
1857 printk(KERN_WARNING "MPS support code is not built-in.\n"
1858 "Using acpi=off or acpi=noirq or pci=noacpi "
1859 "may have problem\n");
1866 #ifdef CONFIG_X86_IO_APIC
1867 static int __init parse_acpi_skip_timer_override(char *arg)
1869 acpi_skip_timer_override = 1;
1872 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1874 static int __init parse_acpi_use_timer_override(char *arg)
1876 acpi_use_timer_override = 1;
1879 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1880 #endif /* CONFIG_X86_IO_APIC */
1882 static int __init setup_acpi_sci(char *s)
1886 if (!strcmp(s, "edge"))
1887 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1888 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1889 else if (!strcmp(s, "level"))
1890 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1891 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1892 else if (!strcmp(s, "high"))
1893 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1894 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1895 else if (!strcmp(s, "low"))
1896 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1897 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1902 early_param("acpi_sci", setup_acpi_sci);
1904 int __acpi_acquire_global_lock(unsigned int *lock)
1906 unsigned int old, new, val;
1909 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1910 val = cmpxchg(lock, old, new);
1911 } while (unlikely (val != old));
1912 return (new < 3) ? -1 : 0;
1915 int __acpi_release_global_lock(unsigned int *lock)
1917 unsigned int old, new, val;
1921 val = cmpxchg(lock, old, new);
1922 } while (unlikely (val != old));