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>
61 #include <asm/genapic.h>
65 #ifdef CONFIG_X86_LOCAL_APIC
66 #include <mach_apic.h>
67 #include <mach_mpparse.h>
68 #endif /* CONFIG_X86_LOCAL_APIC */
72 #define BAD_MADT_ENTRY(entry, end) ( \
73 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
74 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
76 #define PREFIX "ACPI: "
78 int acpi_noirq; /* skip ACPI IRQ initialization */
79 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
80 EXPORT_SYMBOL(acpi_pci_disabled);
81 int acpi_ht __initdata = 1; /* enable HT */
87 u8 acpi_sci_flags __initdata;
88 int acpi_sci_override_gsi __initdata;
89 int acpi_skip_timer_override __initdata;
90 int acpi_use_timer_override __initdata;
92 #ifdef CONFIG_X86_LOCAL_APIC
93 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
96 #ifndef __HAVE_ARCH_CMPXCHG
97 #warning ACPI uses CMPXCHG, i486 and later hardware
100 static int acpi_mcfg_64bit_base_addr __initdata = FALSE;
102 /* --------------------------------------------------------------------------
103 Boot-time Configuration
104 -------------------------------------------------------------------------- */
107 * The default interrupt routing model is PIC (8259). This gets
108 * overridden if IOAPICs are enumerated (below).
110 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
114 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
115 * to map the target physical address. The problem is that set_fixmap()
116 * provides a single page, and it is possible that the page is not
118 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
119 * i.e. until the next __va_range() call.
121 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
122 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
123 * count idx down while incrementing the phys address.
125 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
127 unsigned long base, offset, mapped_size;
133 if (phys+size <= (max_low_pfn_mapped << PAGE_SHIFT))
136 offset = phys & (PAGE_SIZE - 1);
137 mapped_size = PAGE_SIZE - offset;
138 clear_fixmap(FIX_ACPI_END);
139 set_fixmap(FIX_ACPI_END, phys);
140 base = fix_to_virt(FIX_ACPI_END);
143 * Most cases can be covered by the below.
146 while (mapped_size < size) {
147 if (--idx < FIX_ACPI_BEGIN)
148 return NULL; /* cannot handle this */
151 set_fixmap(idx, phys);
152 mapped_size += PAGE_SIZE;
155 return ((unsigned char *)base + offset);
158 #ifdef CONFIG_PCI_MMCONFIG
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;
257 if (boot_cpu_physical_apicid != -1U)
258 ver = apic_version[boot_cpu_physical_apicid];
261 generic_processor_info(id, ver);
265 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
267 struct acpi_madt_local_apic *processor = NULL;
269 processor = (struct acpi_madt_local_apic *)header;
271 if (BAD_MADT_ENTRY(processor, end))
274 acpi_table_print_madt_entry(header);
277 * We need to register disabled CPU as well to permit
278 * counting disabled CPUs. This allows us to size
279 * cpus_possible_map more accurately, to permit
280 * to not preallocating memory for all NR_CPUS
281 * when we use CPU hotplug.
283 acpi_register_lapic(processor->id, /* APIC ID */
284 processor->lapic_flags & ACPI_MADT_ENABLED);
290 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
292 struct acpi_madt_local_sapic *processor = NULL;
294 processor = (struct acpi_madt_local_sapic *)header;
296 if (BAD_MADT_ENTRY(processor, end))
299 acpi_table_print_madt_entry(header);
301 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
302 processor->lapic_flags & ACPI_MADT_ENABLED);
308 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
309 const unsigned long end)
311 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
313 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
315 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
318 acpi_lapic_addr = lapic_addr_ovr->address;
324 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
326 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
328 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
330 if (BAD_MADT_ENTRY(lapic_nmi, end))
333 acpi_table_print_madt_entry(header);
335 if (lapic_nmi->lint != 1)
336 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
341 #endif /*CONFIG_X86_LOCAL_APIC */
343 #ifdef CONFIG_X86_IO_APIC
346 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
348 struct acpi_madt_io_apic *ioapic = NULL;
350 ioapic = (struct acpi_madt_io_apic *)header;
352 if (BAD_MADT_ENTRY(ioapic, end))
355 acpi_table_print_madt_entry(header);
357 mp_register_ioapic(ioapic->id,
358 ioapic->address, ioapic->global_irq_base);
364 * Parse Interrupt Source Override for the ACPI SCI
366 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
368 if (trigger == 0) /* compatible SCI trigger is level */
371 if (polarity == 0) /* compatible SCI polarity is low */
374 /* Command-line over-ride via acpi_sci= */
375 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
376 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
378 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
379 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
382 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
383 * If GSI is < 16, this will update its flags,
384 * else it will create a new mp_irqs[] entry.
386 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
389 * stash over-ride to indicate we've been here
390 * and for later update of acpi_gbl_FADT
392 acpi_sci_override_gsi = gsi;
397 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
398 const unsigned long end)
400 struct acpi_madt_interrupt_override *intsrc = NULL;
402 intsrc = (struct acpi_madt_interrupt_override *)header;
404 if (BAD_MADT_ENTRY(intsrc, end))
407 acpi_table_print_madt_entry(header);
409 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
410 acpi_sci_ioapic_setup(intsrc->global_irq,
411 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
412 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
416 if (acpi_skip_timer_override &&
417 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
418 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
422 mp_override_legacy_irq(intsrc->source_irq,
423 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
424 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
431 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
433 struct acpi_madt_nmi_source *nmi_src = NULL;
435 nmi_src = (struct acpi_madt_nmi_source *)header;
437 if (BAD_MADT_ENTRY(nmi_src, end))
440 acpi_table_print_madt_entry(header);
442 /* TBD: Support nimsrc entries? */
447 #endif /* CONFIG_X86_IO_APIC */
450 * acpi_pic_sci_set_trigger()
452 * use ELCR to set PIC-mode trigger type for SCI
454 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
455 * it may require Edge Trigger -- use "acpi_sci=edge"
457 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
458 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
459 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
460 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
463 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
465 unsigned int mask = 1 << irq;
466 unsigned int old, new;
468 /* Real old ELCR mask */
469 old = inb(0x4d0) | (inb(0x4d1) << 8);
472 * If we use ACPI to set PCI IRQs, then we should clear ELCR
473 * since we will set it correctly as we enable the PCI irq
476 new = acpi_noirq ? old : 0;
479 * Update SCI information in the ELCR, it isn't in the PCI
483 case 1: /* Edge - clear */
486 case 3: /* Level - set */
494 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
496 outb(new >> 8, 0x4d1);
499 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
506 * success: return IRQ number (>=0)
507 * failure: return < 0
509 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
512 unsigned int plat_gsi = gsi;
516 * Make sure all (legacy) PCI IRQs are set as level-triggered.
518 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
519 if (triggering == ACPI_LEVEL_SENSITIVE)
520 eisa_set_level_irq(gsi);
524 #ifdef CONFIG_X86_IO_APIC
525 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
526 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
529 acpi_gsi_to_irq(plat_gsi, &irq);
534 * ACPI based hotplug support for CPU
536 #ifdef CONFIG_ACPI_HOTPLUG_CPU
538 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
540 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
541 union acpi_object *obj;
542 struct acpi_madt_local_apic *lapic;
543 cpumask_t tmp_map, new_map;
547 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
550 if (!buffer.length || !buffer.pointer)
553 obj = buffer.pointer;
554 if (obj->type != ACPI_TYPE_BUFFER ||
555 obj->buffer.length < sizeof(*lapic)) {
556 kfree(buffer.pointer);
560 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
562 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
563 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
564 kfree(buffer.pointer);
570 kfree(buffer.pointer);
571 buffer.length = ACPI_ALLOCATE_BUFFER;
572 buffer.pointer = NULL;
574 tmp_map = cpu_present_map;
575 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
578 * If mp_register_lapic successfully generates a new logical cpu
579 * number, then the following will get us exactly what was mapped
581 cpus_andnot(new_map, cpu_present_map, tmp_map);
582 if (cpus_empty(new_map)) {
583 printk ("Unable to map lapic to logical cpu number\n");
587 cpu = first_cpu(new_map);
593 /* wrapper to silence section mismatch warning */
594 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
596 return _acpi_map_lsapic(handle, pcpu);
598 EXPORT_SYMBOL(acpi_map_lsapic);
600 int acpi_unmap_lsapic(int cpu)
602 per_cpu(x86_cpu_to_apicid, cpu) = -1;
603 cpu_clear(cpu, cpu_present_map);
609 EXPORT_SYMBOL(acpi_unmap_lsapic);
610 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
612 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
618 EXPORT_SYMBOL(acpi_register_ioapic);
620 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
626 EXPORT_SYMBOL(acpi_unregister_ioapic);
628 static int __init acpi_parse_sbf(struct acpi_table_header *table)
630 struct acpi_table_boot *sb;
632 sb = (struct acpi_table_boot *)table;
634 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
638 sbf_port = sb->cmos_index; /* Save CMOS port */
643 #ifdef CONFIG_HPET_TIMER
644 #include <asm/hpet.h>
646 static struct __initdata resource *hpet_res;
648 static int __init acpi_parse_hpet(struct acpi_table_header *table)
650 struct acpi_table_hpet *hpet_tbl;
652 hpet_tbl = (struct acpi_table_hpet *)table;
654 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
658 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
659 printk(KERN_WARNING PREFIX "HPET timers must be located in "
664 hpet_address = hpet_tbl->address.address;
667 * Some broken BIOSes advertise HPET at 0x0. We really do not
668 * want to allocate a resource there.
671 printk(KERN_WARNING PREFIX
672 "HPET id: %#x base: %#lx is invalid\n",
673 hpet_tbl->id, hpet_address);
678 * Some even more broken BIOSes advertise HPET at
679 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
682 if (hpet_address == 0xfed0000000000000UL) {
683 if (!hpet_force_user) {
684 printk(KERN_WARNING PREFIX "HPET id: %#x "
685 "base: 0xfed0000000000000 is bogus\n "
686 "try hpet=force on the kernel command line to "
687 "fix it up to 0xfed00000.\n", hpet_tbl->id);
691 printk(KERN_WARNING PREFIX
692 "HPET id: %#x base: 0xfed0000000000000 fixed up "
693 "to 0xfed00000.\n", hpet_tbl->id);
697 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
698 hpet_tbl->id, hpet_address);
701 * Allocate and initialize the HPET firmware resource for adding into
702 * the resource tree during the lateinit timeframe.
704 #define HPET_RESOURCE_NAME_SIZE 9
705 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
707 hpet_res->name = (void *)&hpet_res[1];
708 hpet_res->flags = IORESOURCE_MEM;
709 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
712 hpet_res->start = hpet_address;
713 hpet_res->end = hpet_address + (1 * 1024) - 1;
719 * hpet_insert_resource inserts the HPET resources used into the resource
722 static __init int hpet_insert_resource(void)
727 return insert_resource(&iomem_resource, hpet_res);
730 late_initcall(hpet_insert_resource);
733 #define acpi_parse_hpet NULL
736 static int __init acpi_parse_fadt(struct acpi_table_header *table)
739 #ifdef CONFIG_X86_PM_TIMER
740 /* detect the location of the ACPI PM Timer */
741 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
743 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
744 ACPI_ADR_SPACE_SYSTEM_IO)
747 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
749 * "X" fields are optional extensions to the original V1.0
750 * fields, so we must selectively expand V1.0 fields if the
751 * corresponding X field is zero.
754 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
757 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
760 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
766 #ifdef CONFIG_X86_LOCAL_APIC
768 * Parse LAPIC entries in MADT
769 * returns 0 on success, < 0 on error
772 static void __init acpi_register_lapic_address(unsigned long address)
774 mp_lapic_addr = address;
776 set_fixmap_nocache(FIX_APIC_BASE, address);
777 if (boot_cpu_physical_apicid == -1U) {
778 boot_cpu_physical_apicid = GET_APIC_ID(read_apic_id());
780 apic_version[boot_cpu_physical_apicid] =
781 GET_APIC_VERSION(apic_read(APIC_LVR));
786 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
794 * Note that the LAPIC address is obtained from the MADT (32-bit value)
795 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
799 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
800 acpi_parse_lapic_addr_ovr, 0);
802 printk(KERN_ERR PREFIX
803 "Error parsing LAPIC address override entry\n");
807 acpi_register_lapic_address(acpi_lapic_addr);
812 static int __init acpi_parse_madt_lapic_entries(void)
820 * Note that the LAPIC address is obtained from the MADT (32-bit value)
821 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
825 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
826 acpi_parse_lapic_addr_ovr, 0);
828 printk(KERN_ERR PREFIX
829 "Error parsing LAPIC address override entry\n");
833 acpi_register_lapic_address(acpi_lapic_addr);
835 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
836 acpi_parse_sapic, MAX_APICS);
839 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
840 acpi_parse_lapic, MAX_APICS);
842 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
843 /* TBD: Cleanup to allow fallback to MPS */
845 } else if (count < 0) {
846 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
847 /* TBD: Cleanup to allow fallback to MPS */
852 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
854 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
855 /* TBD: Cleanup to allow fallback to MPS */
860 #endif /* CONFIG_X86_LOCAL_APIC */
862 #ifdef CONFIG_X86_IO_APIC
865 #ifdef CONFIG_X86_ES7000
866 extern int es7000_plat;
873 DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1);
874 } mp_ioapic_routing[MAX_IO_APICS];
876 static int mp_find_ioapic(int gsi)
880 /* Find the IOAPIC that manages this GSI. */
881 for (i = 0; i < nr_ioapics; i++) {
882 if ((gsi >= mp_ioapic_routing[i].gsi_base)
883 && (gsi <= mp_ioapic_routing[i].gsi_end))
887 printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
891 static u8 __init uniq_ioapic_id(u8 id)
894 if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
895 !APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
896 return io_apic_get_unique_id(nr_ioapics, id);
901 DECLARE_BITMAP(used, 256);
902 bitmap_zero(used, 256);
903 for (i = 0; i < nr_ioapics; i++) {
904 struct mp_config_ioapic *ia = &mp_ioapics[i];
905 __set_bit(ia->mp_apicid, used);
907 if (!test_bit(id, used))
909 return find_first_zero_bit(used, 256);
913 static int bad_ioapic(unsigned long address)
915 if (nr_ioapics >= MAX_IO_APICS) {
916 printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
917 "(found %d)\n", MAX_IO_APICS, nr_ioapics);
918 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
921 printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
922 " found in table, skipping!\n");
928 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
932 if (bad_ioapic(address))
937 mp_ioapics[idx].mp_type = MP_IOAPIC;
938 mp_ioapics[idx].mp_flags = MPC_APIC_USABLE;
939 mp_ioapics[idx].mp_apicaddr = address;
941 set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
942 mp_ioapics[idx].mp_apicid = uniq_ioapic_id(id);
944 mp_ioapics[idx].mp_apicver = io_apic_get_version(idx);
946 mp_ioapics[idx].mp_apicver = 0;
949 * Build basic GSI lookup table to facilitate gsi->io_apic lookups
950 * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
952 mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mp_apicid;
953 mp_ioapic_routing[idx].gsi_base = gsi_base;
954 mp_ioapic_routing[idx].gsi_end = gsi_base +
955 io_apic_get_redir_entries(idx);
957 printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%lx, "
958 "GSI %d-%d\n", idx, mp_ioapics[idx].mp_apicid,
959 mp_ioapics[idx].mp_apicver, mp_ioapics[idx].mp_apicaddr,
960 mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end);
965 static void assign_to_mp_irq(struct mp_config_intsrc *m,
966 struct mp_config_intsrc *mp_irq)
968 memcpy(mp_irq, m, sizeof(struct mp_config_intsrc));
971 static int mp_irq_cmp(struct mp_config_intsrc *mp_irq,
972 struct mp_config_intsrc *m)
974 return memcmp(mp_irq, m, sizeof(struct mp_config_intsrc));
977 static void save_mp_irq(struct mp_config_intsrc *m)
981 for (i = 0; i < mp_irq_entries; i++) {
982 if (!mp_irq_cmp(&mp_irqs[i], m))
986 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
987 if (++mp_irq_entries == MAX_IRQ_SOURCES)
988 panic("Max # of irq sources exceeded!!\n");
991 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
995 struct mp_config_intsrc mp_irq;
998 * Convert 'gsi' to 'ioapic.pin'.
1000 ioapic = mp_find_ioapic(gsi);
1003 pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1006 * TBD: This check is for faulty timer entries, where the override
1007 * erroneously sets the trigger to level, resulting in a HUGE
1008 * increase of timer interrupts!
1010 if ((bus_irq == 0) && (trigger == 3))
1013 mp_irq.mp_type = MP_INTSRC;
1014 mp_irq.mp_irqtype = mp_INT;
1015 mp_irq.mp_irqflag = (trigger << 2) | polarity;
1016 mp_irq.mp_srcbus = MP_ISA_BUS;
1017 mp_irq.mp_srcbusirq = bus_irq; /* IRQ */
1018 mp_irq.mp_dstapic = mp_ioapics[ioapic].mp_apicid; /* APIC ID */
1019 mp_irq.mp_dstirq = pin; /* INTIN# */
1021 save_mp_irq(&mp_irq);
1024 void __init mp_config_acpi_legacy_irqs(void)
1028 unsigned int dstapic;
1029 struct mp_config_intsrc mp_irq;
1031 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
1033 * Fabricate the legacy ISA bus (bus #31).
1035 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1037 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1038 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1040 #ifdef CONFIG_X86_ES7000
1042 * Older generations of ES7000 have no legacy identity mappings
1044 if (es7000_plat == 1)
1049 * Locate the IOAPIC that manages the ISA IRQs (0-15).
1051 ioapic = mp_find_ioapic(0);
1054 dstapic = mp_ioapics[ioapic].mp_apicid;
1057 * Use the default configuration for the IRQs 0-15. Unless
1058 * overridden by (MADT) interrupt source override entries.
1060 for (i = 0; i < 16; i++) {
1063 for (idx = 0; idx < mp_irq_entries; idx++) {
1064 struct mp_config_intsrc *irq = mp_irqs + idx;
1066 /* Do we already have a mapping for this ISA IRQ? */
1067 if (irq->mp_srcbus == MP_ISA_BUS
1068 && irq->mp_srcbusirq == i)
1071 /* Do we already have a mapping for this IOAPIC pin */
1072 if (irq->mp_dstapic == dstapic &&
1073 irq->mp_dstirq == i)
1077 if (idx != mp_irq_entries) {
1078 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1079 continue; /* IRQ already used */
1082 mp_irq.mp_type = MP_INTSRC;
1083 mp_irq.mp_irqflag = 0; /* Conforming */
1084 mp_irq.mp_srcbus = MP_ISA_BUS;
1085 mp_irq.mp_dstapic = dstapic;
1086 mp_irq.mp_irqtype = mp_INT;
1087 mp_irq.mp_srcbusirq = i; /* Identity mapped */
1088 mp_irq.mp_dstirq = i;
1090 save_mp_irq(&mp_irq);
1094 int mp_register_gsi(u32 gsi, int triggering, int polarity)
1098 #ifdef CONFIG_X86_32
1099 #define MAX_GSI_NUM 4096
1100 #define IRQ_COMPRESSION_START 64
1102 static int pci_irq = IRQ_COMPRESSION_START;
1104 * Mapping between Global System Interrupts, which
1105 * represent all possible interrupts, and IRQs
1106 * assigned to actual devices.
1108 static int gsi_to_irq[MAX_GSI_NUM];
1111 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1115 /* Don't set up the ACPI SCI because it's already set up */
1116 if (acpi_gbl_FADT.sci_interrupt == gsi)
1119 ioapic = mp_find_ioapic(gsi);
1121 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1125 ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1127 #ifdef CONFIG_X86_32
1128 if (ioapic_renumber_irq)
1129 gsi = ioapic_renumber_irq(ioapic, gsi);
1133 * Avoid pin reprogramming. PRTs typically include entries
1134 * with redundant pin->gsi mappings (but unique PCI devices);
1135 * we only program the IOAPIC on the first.
1137 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1138 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1139 "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
1143 if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) {
1144 pr_debug(KERN_DEBUG "Pin %d-%d already programmed\n",
1145 mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
1146 #ifdef CONFIG_X86_32
1147 return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]);
1153 set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed);
1154 #ifdef CONFIG_X86_32
1156 * For GSI >= 64, use IRQ compression
1158 if ((gsi >= IRQ_COMPRESSION_START)
1159 && (triggering == ACPI_LEVEL_SENSITIVE)) {
1161 * For PCI devices assign IRQs in order, avoiding gaps
1162 * due to unused I/O APIC pins.
1165 if (gsi < MAX_GSI_NUM) {
1167 * Retain the VIA chipset work-around (gsi > 15), but
1168 * avoid a problem where the 8254 timer (IRQ0) is setup
1169 * via an override (so it's not on pin 0 of the ioapic),
1170 * and at the same time, the pin 0 interrupt is a PCI
1171 * type. The gsi > 15 test could cause these two pins
1172 * to be shared as IRQ0, and they are not shareable.
1173 * So test for this condition, and if necessary, avoid
1174 * the pin collision.
1178 * Don't assign IRQ used by ACPI SCI
1180 if (gsi == acpi_gbl_FADT.sci_interrupt)
1182 gsi_to_irq[irq] = gsi;
1184 printk(KERN_ERR "GSI %u is too high\n", gsi);
1189 io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
1190 triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
1191 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1195 int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin,
1196 u32 gsi, int triggering, int polarity)
1198 #ifdef CONFIG_X86_MPPARSE
1199 struct mp_config_intsrc mp_irq;
1205 /* print the entry should happen on mptable identically */
1206 mp_irq.mp_type = MP_INTSRC;
1207 mp_irq.mp_irqtype = mp_INT;
1208 mp_irq.mp_irqflag = (triggering == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1209 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1210 mp_irq.mp_srcbus = number;
1211 mp_irq.mp_srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1212 ioapic = mp_find_ioapic(gsi);
1213 mp_irq.mp_dstapic = mp_ioapic_routing[ioapic].apic_id;
1214 mp_irq.mp_dstirq = gsi - mp_ioapic_routing[ioapic].gsi_base;
1216 save_mp_irq(&mp_irq);
1222 * Parse IOAPIC related entries in MADT
1223 * returns 0 on success, < 0 on error
1225 static int __init acpi_parse_madt_ioapic_entries(void)
1230 * ACPI interpreter is required to complete interrupt setup,
1231 * so if it is off, don't enumerate the io-apics with ACPI.
1232 * If MPS is present, it will handle them,
1233 * otherwise the system will stay in PIC mode
1235 if (acpi_disabled || acpi_noirq) {
1243 * if "noapic" boot option, don't look for IO-APICs
1245 if (skip_ioapic_setup) {
1246 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1247 "due to 'noapic' option.\n");
1252 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1255 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1257 } else if (count < 0) {
1258 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1263 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1266 printk(KERN_ERR PREFIX
1267 "Error parsing interrupt source overrides entry\n");
1268 /* TBD: Cleanup to allow fallback to MPS */
1273 * If BIOS did not supply an INT_SRC_OVR for the SCI
1274 * pretend we got one so we can set the SCI flags.
1276 if (!acpi_sci_override_gsi)
1277 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1279 /* Fill in identity legacy mapings where no override */
1280 mp_config_acpi_legacy_irqs();
1283 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1286 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1287 /* TBD: Cleanup to allow fallback to MPS */
1294 static inline int acpi_parse_madt_ioapic_entries(void)
1298 #endif /* !CONFIG_X86_IO_APIC */
1300 static void __init early_acpi_process_madt(void)
1302 #ifdef CONFIG_X86_LOCAL_APIC
1305 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1308 * Parse MADT LAPIC entries
1310 error = early_acpi_parse_madt_lapic_addr_ovr();
1313 smp_found_config = 1;
1315 if (error == -EINVAL) {
1317 * Dell Precision Workstation 410, 610 come here.
1319 printk(KERN_ERR PREFIX
1320 "Invalid BIOS MADT, disabling ACPI\n");
1327 static void __init acpi_process_madt(void)
1329 #ifdef CONFIG_X86_LOCAL_APIC
1332 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1335 * Parse MADT LAPIC entries
1337 error = acpi_parse_madt_lapic_entries();
1341 #ifdef CONFIG_X86_GENERICARCH
1342 generic_bigsmp_probe();
1345 * Parse MADT IO-APIC entries
1347 error = acpi_parse_madt_ioapic_entries();
1349 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1350 acpi_irq_balance_set(NULL);
1353 smp_found_config = 1;
1354 setup_apic_routing();
1357 if (error == -EINVAL) {
1359 * Dell Precision Workstation 410, 610 come here.
1361 printk(KERN_ERR PREFIX
1362 "Invalid BIOS MADT, disabling ACPI\n");
1370 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1373 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1380 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1383 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1390 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1393 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1397 "Warning: DMI blacklist says broken, but acpi forced\n");
1403 * Limit ACPI to CPU enumeration for HT
1405 static int __init force_acpi_ht(const struct dmi_system_id *d)
1408 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1414 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1420 * Force ignoring BIOS IRQ0 pin2 override
1422 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1424 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", d->ident);
1425 acpi_skip_timer_override = 1;
1430 * If your system is blacklisted here, but you find that acpi=force
1431 * works for you, please contact acpi-devel@sourceforge.net
1433 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1435 * Boxes that need ACPI disabled
1438 .callback = dmi_disable_acpi,
1439 .ident = "IBM Thinkpad",
1441 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1442 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1447 * Boxes that need acpi=ht
1450 .callback = force_acpi_ht,
1451 .ident = "FSC Primergy T850",
1453 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1454 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1458 .callback = force_acpi_ht,
1459 .ident = "HP VISUALIZE NT Workstation",
1461 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1462 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1466 .callback = force_acpi_ht,
1467 .ident = "Compaq Workstation W8000",
1469 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1470 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1474 .callback = force_acpi_ht,
1475 .ident = "ASUS P4B266",
1477 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1478 DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1482 .callback = force_acpi_ht,
1483 .ident = "ASUS P2B-DS",
1485 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1486 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1490 .callback = force_acpi_ht,
1491 .ident = "ASUS CUR-DLS",
1493 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1494 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1498 .callback = force_acpi_ht,
1499 .ident = "ABIT i440BX-W83977",
1501 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1502 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1506 .callback = force_acpi_ht,
1507 .ident = "IBM Bladecenter",
1509 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1510 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1514 .callback = force_acpi_ht,
1515 .ident = "IBM eServer xSeries 360",
1517 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1518 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1522 .callback = force_acpi_ht,
1523 .ident = "IBM eserver xSeries 330",
1525 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1526 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1530 .callback = force_acpi_ht,
1531 .ident = "IBM eserver xSeries 440",
1533 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1534 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1539 * Boxes that need ACPI PCI IRQ routing disabled
1542 .callback = disable_acpi_irq,
1543 .ident = "ASUS A7V",
1545 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1546 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1547 /* newer BIOS, Revision 1011, does work */
1548 DMI_MATCH(DMI_BIOS_VERSION,
1549 "ASUS A7V ACPI BIOS Revision 1007"),
1554 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1555 * for LPC bridge, which is needed for the PCI
1556 * interrupt links to work. DSDT fix is in bug 5966.
1557 * 2645, 2646 model numbers are shared with 600/600E/600X
1559 .callback = disable_acpi_irq,
1560 .ident = "IBM Thinkpad 600 Series 2645",
1562 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1563 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1567 .callback = disable_acpi_irq,
1568 .ident = "IBM Thinkpad 600 Series 2646",
1570 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1571 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1575 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1578 .callback = disable_acpi_pci,
1579 .ident = "ASUS PR-DLS",
1581 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1582 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1583 DMI_MATCH(DMI_BIOS_VERSION,
1584 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1585 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1589 .callback = disable_acpi_pci,
1590 .ident = "Acer TravelMate 36x Laptop",
1592 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1593 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1597 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1598 * which includes some code which overrides all temperature
1599 * trip points to 16C if the INTIN2 input of the I/O APIC
1600 * is enabled. This input is incorrectly designated the
1601 * ISA IRQ 0 via an interrupt source override even though
1602 * it is wired to the output of the master 8259A and INTIN0
1603 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1604 * override in that cases.
1607 .callback = dmi_ignore_irq0_timer_override,
1608 .ident = "HP nx6115 laptop",
1610 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1611 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1615 .callback = dmi_ignore_irq0_timer_override,
1616 .ident = "HP NX6125 laptop",
1618 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1619 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1623 .callback = dmi_ignore_irq0_timer_override,
1624 .ident = "HP NX6325 laptop",
1626 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1627 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1631 .callback = dmi_ignore_irq0_timer_override,
1632 .ident = "HP 6715b laptop",
1634 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1635 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1642 * acpi_boot_table_init() and acpi_boot_init()
1643 * called from setup_arch(), always.
1644 * 1. checksums all tables
1645 * 2. enumerates lapics
1646 * 3. enumerates io-apics
1648 * acpi_table_init() is separate to allow reading SRAT without
1649 * other side effects.
1651 * side effects of acpi_boot_init:
1652 * acpi_lapic = 1 if LAPIC found
1653 * acpi_ioapic = 1 if IOAPIC found
1654 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1655 * if acpi_blacklisted() acpi_disabled = 1;
1656 * acpi_irq_model=...
1659 * return value: (currently ignored)
1664 int __init acpi_boot_table_init(void)
1668 dmi_check_system(acpi_dmi_table);
1671 * If acpi_disabled, bail out
1672 * One exception: acpi=ht continues far enough to enumerate LAPICs
1674 if (acpi_disabled && !acpi_ht)
1678 * Initialize the ACPI boot-time table parser.
1680 error = acpi_table_init();
1686 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1689 * blacklist may disable ACPI entirely
1691 error = acpi_blacklisted();
1694 printk(KERN_WARNING PREFIX "acpi=force override\n");
1696 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1705 int __init early_acpi_boot_init(void)
1708 * If acpi_disabled, bail out
1709 * One exception: acpi=ht continues far enough to enumerate LAPICs
1711 if (acpi_disabled && !acpi_ht)
1715 * Process the Multiple APIC Description Table (MADT), if present
1717 early_acpi_process_madt();
1722 int __init acpi_boot_init(void)
1725 * If acpi_disabled, bail out
1726 * One exception: acpi=ht continues far enough to enumerate LAPICs
1728 if (acpi_disabled && !acpi_ht)
1731 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1734 * set sci_int and PM timer address
1736 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1739 * Process the Multiple APIC Description Table (MADT), if present
1741 acpi_process_madt();
1743 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1748 static int __init parse_acpi(char *arg)
1753 /* "acpi=off" disables both ACPI table parsing and interpreter */
1754 if (strcmp(arg, "off") == 0) {
1757 /* acpi=force to over-ride black-list */
1758 else if (strcmp(arg, "force") == 0) {
1763 /* acpi=strict disables out-of-spec workarounds */
1764 else if (strcmp(arg, "strict") == 0) {
1767 /* Limit ACPI just to boot-time to enable HT */
1768 else if (strcmp(arg, "ht") == 0) {
1773 /* "acpi=noirq" disables ACPI interrupt routing */
1774 else if (strcmp(arg, "noirq") == 0) {
1777 /* Core will printk when we return error. */
1782 early_param("acpi", parse_acpi);
1784 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1785 static int __init parse_pci(char *arg)
1787 if (arg && strcmp(arg, "noacpi") == 0)
1791 early_param("pci", parse_pci);
1793 int __init acpi_mps_check(void)
1795 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1796 /* mptable code is not built-in*/
1797 if (acpi_disabled || acpi_noirq) {
1798 printk(KERN_WARNING "MPS support code is not built-in.\n"
1799 "Using acpi=off or acpi=noirq or pci=noacpi "
1800 "may have problem\n");
1807 #ifdef CONFIG_X86_IO_APIC
1808 static int __init parse_acpi_skip_timer_override(char *arg)
1810 acpi_skip_timer_override = 1;
1813 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1815 static int __init parse_acpi_use_timer_override(char *arg)
1817 acpi_use_timer_override = 1;
1820 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1821 #endif /* CONFIG_X86_IO_APIC */
1823 static int __init setup_acpi_sci(char *s)
1827 if (!strcmp(s, "edge"))
1828 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1829 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1830 else if (!strcmp(s, "level"))
1831 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1832 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1833 else if (!strcmp(s, "high"))
1834 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1835 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1836 else if (!strcmp(s, "low"))
1837 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1838 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1843 early_param("acpi_sci", setup_acpi_sci);
1845 int __acpi_acquire_global_lock(unsigned int *lock)
1847 unsigned int old, new, val;
1850 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1851 val = cmpxchg(lock, old, new);
1852 } while (unlikely (val != old));
1853 return (new < 3) ? -1 : 0;
1856 int __acpi_release_global_lock(unsigned int *lock)
1858 unsigned int old, new, val;
1862 val = cmpxchg(lock, old, new);
1863 } while (unlikely (val != old));