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 static int disable_irq0_through_ioapic __initdata;
89 u8 acpi_sci_flags __initdata;
90 int acpi_sci_override_gsi __initdata;
91 int acpi_skip_timer_override __initdata;
92 int acpi_use_timer_override __initdata;
94 #ifdef CONFIG_X86_LOCAL_APIC
95 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
98 #ifndef __HAVE_ARCH_CMPXCHG
99 #warning ACPI uses CMPXCHG, i486 and later hardware
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 /* rely on all ACPI tables being in the direct mapping */
115 char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
117 if (!phys_addr || !size)
120 if (phys_addr+size <= (max_pfn_mapped << PAGE_SHIFT) + PAGE_SIZE)
121 return __va(phys_addr);
129 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
130 * to map the target physical address. The problem is that set_fixmap()
131 * provides a single page, and it is possible that the page is not
133 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
134 * i.e. until the next __va_range() call.
136 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
137 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
138 * count idx down while incrementing the phys address.
140 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
142 unsigned long base, offset, mapped_size;
145 if (phys + size < 8 * 1024 * 1024)
148 offset = phys & (PAGE_SIZE - 1);
149 mapped_size = PAGE_SIZE - offset;
150 set_fixmap(FIX_ACPI_END, phys);
151 base = fix_to_virt(FIX_ACPI_END);
154 * Most cases can be covered by the below.
157 while (mapped_size < size) {
158 if (--idx < FIX_ACPI_BEGIN)
159 return NULL; /* cannot handle this */
161 set_fixmap(idx, phys);
162 mapped_size += PAGE_SIZE;
165 return ((unsigned char *)base + offset);
169 #ifdef CONFIG_PCI_MMCONFIG
170 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
171 struct acpi_mcfg_allocation *pci_mmcfg_config;
172 int pci_mmcfg_config_num;
174 int __init acpi_parse_mcfg(struct acpi_table_header *header)
176 struct acpi_table_mcfg *mcfg;
183 mcfg = (struct acpi_table_mcfg *)header;
185 /* how many config structures do we have */
186 pci_mmcfg_config_num = 0;
187 i = header->length - sizeof(struct acpi_table_mcfg);
188 while (i >= sizeof(struct acpi_mcfg_allocation)) {
189 ++pci_mmcfg_config_num;
190 i -= sizeof(struct acpi_mcfg_allocation);
192 if (pci_mmcfg_config_num == 0) {
193 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
197 config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
198 pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
199 if (!pci_mmcfg_config) {
200 printk(KERN_WARNING PREFIX
201 "No memory for MCFG config tables\n");
205 memcpy(pci_mmcfg_config, &mcfg[1], config_size);
206 for (i = 0; i < pci_mmcfg_config_num; ++i) {
207 if (pci_mmcfg_config[i].address > 0xFFFFFFFF) {
208 printk(KERN_ERR PREFIX
209 "MMCONFIG not in low 4GB of memory\n");
210 kfree(pci_mmcfg_config);
211 pci_mmcfg_config_num = 0;
218 #endif /* CONFIG_PCI_MMCONFIG */
220 #ifdef CONFIG_X86_LOCAL_APIC
221 static int __init acpi_parse_madt(struct acpi_table_header *table)
223 struct acpi_table_madt *madt = NULL;
228 madt = (struct acpi_table_madt *)table;
230 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
235 acpi_lapic_addr = (u64) madt->address;
237 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
241 acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
246 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
248 unsigned int ver = 0;
256 if (boot_cpu_physical_apicid != -1U)
257 ver = apic_version[boot_cpu_physical_apicid];
260 generic_processor_info(id, ver);
264 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
266 struct acpi_madt_local_apic *processor = NULL;
268 processor = (struct acpi_madt_local_apic *)header;
270 if (BAD_MADT_ENTRY(processor, end))
273 acpi_table_print_madt_entry(header);
276 * We need to register disabled CPU as well to permit
277 * counting disabled CPUs. This allows us to size
278 * cpus_possible_map more accurately, to permit
279 * to not preallocating memory for all NR_CPUS
280 * when we use CPU hotplug.
282 acpi_register_lapic(processor->id, /* APIC ID */
283 processor->lapic_flags & ACPI_MADT_ENABLED);
289 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
291 struct acpi_madt_local_sapic *processor = NULL;
293 processor = (struct acpi_madt_local_sapic *)header;
295 if (BAD_MADT_ENTRY(processor, end))
298 acpi_table_print_madt_entry(header);
300 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
301 processor->lapic_flags & ACPI_MADT_ENABLED);
307 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
308 const unsigned long end)
310 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
312 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
314 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
317 acpi_lapic_addr = lapic_addr_ovr->address;
323 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
325 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
327 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
329 if (BAD_MADT_ENTRY(lapic_nmi, end))
332 acpi_table_print_madt_entry(header);
334 if (lapic_nmi->lint != 1)
335 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
340 #endif /*CONFIG_X86_LOCAL_APIC */
342 #ifdef CONFIG_X86_IO_APIC
345 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
347 struct acpi_madt_io_apic *ioapic = NULL;
349 ioapic = (struct acpi_madt_io_apic *)header;
351 if (BAD_MADT_ENTRY(ioapic, end))
354 acpi_table_print_madt_entry(header);
356 mp_register_ioapic(ioapic->id,
357 ioapic->address, ioapic->global_irq_base);
363 * Parse Interrupt Source Override for the ACPI SCI
365 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
367 if (trigger == 0) /* compatible SCI trigger is level */
370 if (polarity == 0) /* compatible SCI polarity is low */
373 /* Command-line over-ride via acpi_sci= */
374 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
375 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
377 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
378 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
381 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
382 * If GSI is < 16, this will update its flags,
383 * else it will create a new mp_irqs[] entry.
385 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
388 * stash over-ride to indicate we've been here
389 * and for later update of acpi_gbl_FADT
391 acpi_sci_override_gsi = gsi;
396 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
397 const unsigned long end)
399 struct acpi_madt_interrupt_override *intsrc = NULL;
401 intsrc = (struct acpi_madt_interrupt_override *)header;
403 if (BAD_MADT_ENTRY(intsrc, end))
406 acpi_table_print_madt_entry(header);
408 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
409 acpi_sci_ioapic_setup(intsrc->global_irq,
410 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
411 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
415 if (acpi_skip_timer_override &&
416 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
417 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
421 mp_override_legacy_irq(intsrc->source_irq,
422 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
423 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
430 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
432 struct acpi_madt_nmi_source *nmi_src = NULL;
434 nmi_src = (struct acpi_madt_nmi_source *)header;
436 if (BAD_MADT_ENTRY(nmi_src, end))
439 acpi_table_print_madt_entry(header);
441 /* TBD: Support nimsrc entries? */
446 #endif /* CONFIG_X86_IO_APIC */
449 * acpi_pic_sci_set_trigger()
451 * use ELCR to set PIC-mode trigger type for SCI
453 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
454 * it may require Edge Trigger -- use "acpi_sci=edge"
456 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
457 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
458 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
459 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
462 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
464 unsigned int mask = 1 << irq;
465 unsigned int old, new;
467 /* Real old ELCR mask */
468 old = inb(0x4d0) | (inb(0x4d1) << 8);
471 * If we use ACPI to set PCI IRQs, then we should clear ELCR
472 * since we will set it correctly as we enable the PCI irq
475 new = acpi_noirq ? old : 0;
478 * Update SCI information in the ELCR, it isn't in the PCI
482 case 1: /* Edge - clear */
485 case 3: /* Level - set */
493 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
495 outb(new >> 8, 0x4d1);
498 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
505 * success: return IRQ number (>=0)
506 * failure: return < 0
508 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
511 unsigned int plat_gsi = gsi;
515 * Make sure all (legacy) PCI IRQs are set as level-triggered.
517 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
518 if (triggering == ACPI_LEVEL_SENSITIVE)
519 eisa_set_level_irq(gsi);
523 #ifdef CONFIG_X86_IO_APIC
524 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
525 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
528 acpi_gsi_to_irq(plat_gsi, &irq);
533 * ACPI based hotplug support for CPU
535 #ifdef CONFIG_ACPI_HOTPLUG_CPU
537 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
539 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
540 union acpi_object *obj;
541 struct acpi_madt_local_apic *lapic;
542 cpumask_t tmp_map, new_map;
546 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
549 if (!buffer.length || !buffer.pointer)
552 obj = buffer.pointer;
553 if (obj->type != ACPI_TYPE_BUFFER ||
554 obj->buffer.length < sizeof(*lapic)) {
555 kfree(buffer.pointer);
559 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
561 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
562 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
563 kfree(buffer.pointer);
569 kfree(buffer.pointer);
570 buffer.length = ACPI_ALLOCATE_BUFFER;
571 buffer.pointer = NULL;
573 tmp_map = cpu_present_map;
574 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
577 * If mp_register_lapic successfully generates a new logical cpu
578 * number, then the following will get us exactly what was mapped
580 cpus_andnot(new_map, cpu_present_map, tmp_map);
581 if (cpus_empty(new_map)) {
582 printk ("Unable to map lapic to logical cpu number\n");
586 cpu = first_cpu(new_map);
592 /* wrapper to silence section mismatch warning */
593 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
595 return _acpi_map_lsapic(handle, pcpu);
597 EXPORT_SYMBOL(acpi_map_lsapic);
599 int acpi_unmap_lsapic(int cpu)
601 per_cpu(x86_cpu_to_apicid, cpu) = -1;
602 cpu_clear(cpu, cpu_present_map);
608 EXPORT_SYMBOL(acpi_unmap_lsapic);
609 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
611 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
617 EXPORT_SYMBOL(acpi_register_ioapic);
619 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
625 EXPORT_SYMBOL(acpi_unregister_ioapic);
627 static int __init acpi_parse_sbf(struct acpi_table_header *table)
629 struct acpi_table_boot *sb;
631 sb = (struct acpi_table_boot *)table;
633 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
637 sbf_port = sb->cmos_index; /* Save CMOS port */
642 #ifdef CONFIG_HPET_TIMER
643 #include <asm/hpet.h>
645 static struct __initdata resource *hpet_res;
647 static int __init acpi_parse_hpet(struct acpi_table_header *table)
649 struct acpi_table_hpet *hpet_tbl;
651 hpet_tbl = (struct acpi_table_hpet *)table;
653 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
657 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
658 printk(KERN_WARNING PREFIX "HPET timers must be located in "
663 hpet_address = hpet_tbl->address.address;
666 * Some broken BIOSes advertise HPET at 0x0. We really do not
667 * want to allocate a resource there.
670 printk(KERN_WARNING PREFIX
671 "HPET id: %#x base: %#lx is invalid\n",
672 hpet_tbl->id, hpet_address);
677 * Some even more broken BIOSes advertise HPET at
678 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
681 if (hpet_address == 0xfed0000000000000UL) {
682 if (!hpet_force_user) {
683 printk(KERN_WARNING PREFIX "HPET id: %#x "
684 "base: 0xfed0000000000000 is bogus\n "
685 "try hpet=force on the kernel command line to "
686 "fix it up to 0xfed00000.\n", hpet_tbl->id);
690 printk(KERN_WARNING PREFIX
691 "HPET id: %#x base: 0xfed0000000000000 fixed up "
692 "to 0xfed00000.\n", hpet_tbl->id);
696 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
697 hpet_tbl->id, hpet_address);
700 * Allocate and initialize the HPET firmware resource for adding into
701 * the resource tree during the lateinit timeframe.
703 #define HPET_RESOURCE_NAME_SIZE 9
704 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
706 hpet_res->name = (void *)&hpet_res[1];
707 hpet_res->flags = IORESOURCE_MEM;
708 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
711 hpet_res->start = hpet_address;
712 hpet_res->end = hpet_address + (1 * 1024) - 1;
718 * hpet_insert_resource inserts the HPET resources used into the resource
721 static __init int hpet_insert_resource(void)
726 return insert_resource(&iomem_resource, hpet_res);
729 late_initcall(hpet_insert_resource);
732 #define acpi_parse_hpet NULL
735 static int __init acpi_parse_fadt(struct acpi_table_header *table)
738 #ifdef CONFIG_X86_PM_TIMER
739 /* detect the location of the ACPI PM Timer */
740 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
742 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
743 ACPI_ADR_SPACE_SYSTEM_IO)
746 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
748 * "X" fields are optional extensions to the original V1.0
749 * fields, so we must selectively expand V1.0 fields if the
750 * corresponding X field is zero.
753 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
756 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
759 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
765 #ifdef CONFIG_X86_LOCAL_APIC
767 * Parse LAPIC entries in MADT
768 * returns 0 on success, < 0 on error
771 static void __init acpi_register_lapic_address(unsigned long address)
773 mp_lapic_addr = address;
775 set_fixmap_nocache(FIX_APIC_BASE, address);
776 if (boot_cpu_physical_apicid == -1U) {
777 boot_cpu_physical_apicid = GET_APIC_ID(read_apic_id());
779 apic_version[boot_cpu_physical_apicid] =
780 GET_APIC_VERSION(apic_read(APIC_LVR));
785 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
793 * Note that the LAPIC address is obtained from the MADT (32-bit value)
794 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
798 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
799 acpi_parse_lapic_addr_ovr, 0);
801 printk(KERN_ERR PREFIX
802 "Error parsing LAPIC address override entry\n");
806 acpi_register_lapic_address(acpi_lapic_addr);
811 static int __init acpi_parse_madt_lapic_entries(void)
819 * Note that the LAPIC address is obtained from the MADT (32-bit value)
820 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
824 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
825 acpi_parse_lapic_addr_ovr, 0);
827 printk(KERN_ERR PREFIX
828 "Error parsing LAPIC address override entry\n");
832 acpi_register_lapic_address(acpi_lapic_addr);
834 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
835 acpi_parse_sapic, MAX_APICS);
838 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
839 acpi_parse_lapic, MAX_APICS);
841 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
842 /* TBD: Cleanup to allow fallback to MPS */
844 } else if (count < 0) {
845 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
846 /* TBD: Cleanup to allow fallback to MPS */
851 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
853 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
854 /* TBD: Cleanup to allow fallback to MPS */
859 #endif /* CONFIG_X86_LOCAL_APIC */
861 #ifdef CONFIG_X86_IO_APIC
864 #ifdef CONFIG_X86_ES7000
865 extern int es7000_plat;
872 DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1);
873 } mp_ioapic_routing[MAX_IO_APICS];
875 static int mp_find_ioapic(int gsi)
879 /* Find the IOAPIC that manages this GSI. */
880 for (i = 0; i < nr_ioapics; i++) {
881 if ((gsi >= mp_ioapic_routing[i].gsi_base)
882 && (gsi <= mp_ioapic_routing[i].gsi_end))
886 printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
890 static u8 __init uniq_ioapic_id(u8 id)
893 if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
894 !APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
895 return io_apic_get_unique_id(nr_ioapics, id);
900 DECLARE_BITMAP(used, 256);
901 bitmap_zero(used, 256);
902 for (i = 0; i < nr_ioapics; i++) {
903 struct mp_config_ioapic *ia = &mp_ioapics[i];
904 __set_bit(ia->mp_apicid, used);
906 if (!test_bit(id, used))
908 return find_first_zero_bit(used, 256);
912 static int bad_ioapic(unsigned long address)
914 if (nr_ioapics >= MAX_IO_APICS) {
915 printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
916 "(found %d)\n", MAX_IO_APICS, nr_ioapics);
917 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
920 printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
921 " found in table, skipping!\n");
927 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
931 if (bad_ioapic(address))
936 mp_ioapics[idx].mp_type = MP_IOAPIC;
937 mp_ioapics[idx].mp_flags = MPC_APIC_USABLE;
938 mp_ioapics[idx].mp_apicaddr = address;
940 set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
941 mp_ioapics[idx].mp_apicid = uniq_ioapic_id(id);
943 mp_ioapics[idx].mp_apicver = io_apic_get_version(idx);
945 mp_ioapics[idx].mp_apicver = 0;
948 * Build basic GSI lookup table to facilitate gsi->io_apic lookups
949 * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
951 mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mp_apicid;
952 mp_ioapic_routing[idx].gsi_base = gsi_base;
953 mp_ioapic_routing[idx].gsi_end = gsi_base +
954 io_apic_get_redir_entries(idx);
956 printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%lx, "
957 "GSI %d-%d\n", idx, mp_ioapics[idx].mp_apicid,
958 mp_ioapics[idx].mp_apicver, mp_ioapics[idx].mp_apicaddr,
959 mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end);
964 static void assign_to_mp_irq(struct mp_config_intsrc *m,
965 struct mp_config_intsrc *mp_irq)
967 memcpy(mp_irq, m, sizeof(struct mp_config_intsrc));
970 static int mp_irq_cmp(struct mp_config_intsrc *mp_irq,
971 struct mp_config_intsrc *m)
973 return memcmp(mp_irq, m, sizeof(struct mp_config_intsrc));
976 static void save_mp_irq(struct mp_config_intsrc *m)
980 for (i = 0; i < mp_irq_entries; i++) {
981 if (!mp_irq_cmp(&mp_irqs[i], m))
985 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
986 if (++mp_irq_entries == MAX_IRQ_SOURCES)
987 panic("Max # of irq sources exceeded!!\n");
990 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
994 struct mp_config_intsrc mp_irq;
996 /* Skip the 8254 timer interrupt (IRQ 0) if requested. */
997 if (bus_irq == 0 && disable_irq0_through_ioapic)
1001 * Convert 'gsi' to 'ioapic.pin'.
1003 ioapic = mp_find_ioapic(gsi);
1006 pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1009 * TBD: This check is for faulty timer entries, where the override
1010 * erroneously sets the trigger to level, resulting in a HUGE
1011 * increase of timer interrupts!
1013 if ((bus_irq == 0) && (trigger == 3))
1016 mp_irq.mp_type = MP_INTSRC;
1017 mp_irq.mp_irqtype = mp_INT;
1018 mp_irq.mp_irqflag = (trigger << 2) | polarity;
1019 mp_irq.mp_srcbus = MP_ISA_BUS;
1020 mp_irq.mp_srcbusirq = bus_irq; /* IRQ */
1021 mp_irq.mp_dstapic = mp_ioapics[ioapic].mp_apicid; /* APIC ID */
1022 mp_irq.mp_dstirq = pin; /* INTIN# */
1024 save_mp_irq(&mp_irq);
1027 void __init mp_config_acpi_legacy_irqs(void)
1031 unsigned int dstapic;
1032 struct mp_config_intsrc mp_irq;
1034 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
1036 * Fabricate the legacy ISA bus (bus #31).
1038 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1040 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1041 Dprintk("Bus #%d is ISA\n", MP_ISA_BUS);
1043 #ifdef CONFIG_X86_ES7000
1045 * Older generations of ES7000 have no legacy identity mappings
1047 if (es7000_plat == 1)
1052 * Locate the IOAPIC that manages the ISA IRQs (0-15).
1054 ioapic = mp_find_ioapic(0);
1057 dstapic = mp_ioapics[ioapic].mp_apicid;
1060 * Use the default configuration for the IRQs 0-15. Unless
1061 * overridden by (MADT) interrupt source override entries.
1063 for (i = 0; i < 16; i++) {
1066 /* Skip the 8254 timer interrupt (IRQ 0) if requested. */
1067 if (i == 0 && disable_irq0_through_ioapic)
1070 for (idx = 0; idx < mp_irq_entries; idx++) {
1071 struct mp_config_intsrc *irq = mp_irqs + idx;
1073 /* Do we already have a mapping for this ISA IRQ? */
1074 if (irq->mp_srcbus == MP_ISA_BUS
1075 && irq->mp_srcbusirq == i)
1078 /* Do we already have a mapping for this IOAPIC pin */
1079 if (irq->mp_dstapic == dstapic &&
1080 irq->mp_dstirq == i)
1084 if (idx != mp_irq_entries) {
1085 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1086 continue; /* IRQ already used */
1089 mp_irq.mp_type = MP_INTSRC;
1090 mp_irq.mp_irqflag = 0; /* Conforming */
1091 mp_irq.mp_srcbus = MP_ISA_BUS;
1092 mp_irq.mp_dstapic = dstapic;
1093 mp_irq.mp_irqtype = mp_INT;
1094 mp_irq.mp_srcbusirq = i; /* Identity mapped */
1095 mp_irq.mp_dstirq = i;
1097 save_mp_irq(&mp_irq);
1101 int mp_register_gsi(u32 gsi, int triggering, int polarity)
1105 #ifdef CONFIG_X86_32
1106 #define MAX_GSI_NUM 4096
1107 #define IRQ_COMPRESSION_START 64
1109 static int pci_irq = IRQ_COMPRESSION_START;
1111 * Mapping between Global System Interrupts, which
1112 * represent all possible interrupts, and IRQs
1113 * assigned to actual devices.
1115 static int gsi_to_irq[MAX_GSI_NUM];
1118 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1122 /* Don't set up the ACPI SCI because it's already set up */
1123 if (acpi_gbl_FADT.sci_interrupt == gsi)
1126 ioapic = mp_find_ioapic(gsi);
1128 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1132 ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1134 #ifdef CONFIG_X86_32
1135 if (ioapic_renumber_irq)
1136 gsi = ioapic_renumber_irq(ioapic, gsi);
1140 * Avoid pin reprogramming. PRTs typically include entries
1141 * with redundant pin->gsi mappings (but unique PCI devices);
1142 * we only program the IOAPIC on the first.
1144 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1145 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1146 "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
1150 if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) {
1151 Dprintk(KERN_DEBUG "Pin %d-%d already programmed\n",
1152 mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
1153 #ifdef CONFIG_X86_32
1154 return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]);
1160 set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed);
1161 #ifdef CONFIG_X86_32
1163 * For GSI >= 64, use IRQ compression
1165 if ((gsi >= IRQ_COMPRESSION_START)
1166 && (triggering == ACPI_LEVEL_SENSITIVE)) {
1168 * For PCI devices assign IRQs in order, avoiding gaps
1169 * due to unused I/O APIC pins.
1172 if (gsi < MAX_GSI_NUM) {
1174 * Retain the VIA chipset work-around (gsi > 15), but
1175 * avoid a problem where the 8254 timer (IRQ0) is setup
1176 * via an override (so it's not on pin 0 of the ioapic),
1177 * and at the same time, the pin 0 interrupt is a PCI
1178 * type. The gsi > 15 test could cause these two pins
1179 * to be shared as IRQ0, and they are not shareable.
1180 * So test for this condition, and if necessary, avoid
1181 * the pin collision.
1185 * Don't assign IRQ used by ACPI SCI
1187 if (gsi == acpi_gbl_FADT.sci_interrupt)
1189 gsi_to_irq[irq] = gsi;
1191 printk(KERN_ERR "GSI %u is too high\n", gsi);
1196 io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
1197 triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
1198 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1202 int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin,
1203 u32 gsi, int triggering, int polarity)
1205 #ifdef CONFIG_X86_MPPARSE
1206 struct mp_config_intsrc mp_irq;
1212 /* print the entry should happen on mptable identically */
1213 mp_irq.mp_type = MP_INTSRC;
1214 mp_irq.mp_irqtype = mp_INT;
1215 mp_irq.mp_irqflag = (triggering == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1216 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1217 mp_irq.mp_srcbus = number;
1218 mp_irq.mp_srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1219 ioapic = mp_find_ioapic(gsi);
1220 mp_irq.mp_dstapic = mp_ioapic_routing[ioapic].apic_id;
1221 mp_irq.mp_dstirq = gsi - mp_ioapic_routing[ioapic].gsi_base;
1223 save_mp_irq(&mp_irq);
1229 * Parse IOAPIC related entries in MADT
1230 * returns 0 on success, < 0 on error
1232 static int __init acpi_parse_madt_ioapic_entries(void)
1237 * ACPI interpreter is required to complete interrupt setup,
1238 * so if it is off, don't enumerate the io-apics with ACPI.
1239 * If MPS is present, it will handle them,
1240 * otherwise the system will stay in PIC mode
1242 if (acpi_disabled || acpi_noirq) {
1250 * if "noapic" boot option, don't look for IO-APICs
1252 if (skip_ioapic_setup) {
1253 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1254 "due to 'noapic' option.\n");
1259 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1262 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1264 } else if (count < 0) {
1265 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1270 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1273 printk(KERN_ERR PREFIX
1274 "Error parsing interrupt source overrides entry\n");
1275 /* TBD: Cleanup to allow fallback to MPS */
1280 * If BIOS did not supply an INT_SRC_OVR for the SCI
1281 * pretend we got one so we can set the SCI flags.
1283 if (!acpi_sci_override_gsi)
1284 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1286 /* Fill in identity legacy mapings where no override */
1287 mp_config_acpi_legacy_irqs();
1290 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1293 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1294 /* TBD: Cleanup to allow fallback to MPS */
1301 static inline int acpi_parse_madt_ioapic_entries(void)
1305 #endif /* !CONFIG_X86_IO_APIC */
1307 static void __init early_acpi_process_madt(void)
1309 #ifdef CONFIG_X86_LOCAL_APIC
1312 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1315 * Parse MADT LAPIC entries
1317 error = early_acpi_parse_madt_lapic_addr_ovr();
1320 smp_found_config = 1;
1322 if (error == -EINVAL) {
1324 * Dell Precision Workstation 410, 610 come here.
1326 printk(KERN_ERR PREFIX
1327 "Invalid BIOS MADT, disabling ACPI\n");
1334 static void __init acpi_process_madt(void)
1336 #ifdef CONFIG_X86_LOCAL_APIC
1339 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1342 * Parse MADT LAPIC entries
1344 error = acpi_parse_madt_lapic_entries();
1348 #ifdef CONFIG_X86_GENERICARCH
1349 generic_bigsmp_probe();
1352 * Parse MADT IO-APIC entries
1354 error = acpi_parse_madt_ioapic_entries();
1356 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1357 acpi_irq_balance_set(NULL);
1360 smp_found_config = 1;
1361 setup_apic_routing();
1364 if (error == -EINVAL) {
1366 * Dell Precision Workstation 410, 610 come here.
1368 printk(KERN_ERR PREFIX
1369 "Invalid BIOS MADT, disabling ACPI\n");
1377 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1380 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1387 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1390 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1397 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1400 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1404 "Warning: DMI blacklist says broken, but acpi forced\n");
1410 * Limit ACPI to CPU enumeration for HT
1412 static int __init force_acpi_ht(const struct dmi_system_id *d)
1415 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1421 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1427 * Don't register any I/O APIC entries for the 8254 timer IRQ.
1430 dmi_disable_irq0_through_ioapic(const struct dmi_system_id *d)
1432 pr_notice("%s detected: disabling IRQ 0 through I/O APIC\n", d->ident);
1433 disable_irq0_through_ioapic = 1;
1438 * Force ignoring BIOS IRQ0 pin2 override
1440 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1442 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", d->ident);
1443 acpi_skip_timer_override = 1;
1444 force_mask_ioapic_irq_2();
1449 * If your system is blacklisted here, but you find that acpi=force
1450 * works for you, please contact acpi-devel@sourceforge.net
1452 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1454 * Boxes that need ACPI disabled
1457 .callback = dmi_disable_acpi,
1458 .ident = "IBM Thinkpad",
1460 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1461 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1466 * Boxes that need acpi=ht
1469 .callback = force_acpi_ht,
1470 .ident = "FSC Primergy T850",
1472 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1473 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1477 .callback = force_acpi_ht,
1478 .ident = "HP VISUALIZE NT Workstation",
1480 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1481 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1485 .callback = force_acpi_ht,
1486 .ident = "Compaq Workstation W8000",
1488 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1489 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1493 .callback = force_acpi_ht,
1494 .ident = "ASUS P4B266",
1496 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1497 DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1501 .callback = force_acpi_ht,
1502 .ident = "ASUS P2B-DS",
1504 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1505 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1509 .callback = force_acpi_ht,
1510 .ident = "ASUS CUR-DLS",
1512 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1513 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1517 .callback = force_acpi_ht,
1518 .ident = "ABIT i440BX-W83977",
1520 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1521 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1525 .callback = force_acpi_ht,
1526 .ident = "IBM Bladecenter",
1528 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1529 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1533 .callback = force_acpi_ht,
1534 .ident = "IBM eServer xSeries 360",
1536 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1537 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1541 .callback = force_acpi_ht,
1542 .ident = "IBM eserver xSeries 330",
1544 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1545 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1549 .callback = force_acpi_ht,
1550 .ident = "IBM eserver xSeries 440",
1552 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1553 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1558 * Boxes that need ACPI PCI IRQ routing disabled
1561 .callback = disable_acpi_irq,
1562 .ident = "ASUS A7V",
1564 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1565 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1566 /* newer BIOS, Revision 1011, does work */
1567 DMI_MATCH(DMI_BIOS_VERSION,
1568 "ASUS A7V ACPI BIOS Revision 1007"),
1573 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1574 * for LPC bridge, which is needed for the PCI
1575 * interrupt links to work. DSDT fix is in bug 5966.
1576 * 2645, 2646 model numbers are shared with 600/600E/600X
1578 .callback = disable_acpi_irq,
1579 .ident = "IBM Thinkpad 600 Series 2645",
1581 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1582 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1586 .callback = disable_acpi_irq,
1587 .ident = "IBM Thinkpad 600 Series 2646",
1589 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1590 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1594 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1597 .callback = disable_acpi_pci,
1598 .ident = "ASUS PR-DLS",
1600 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1601 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1602 DMI_MATCH(DMI_BIOS_VERSION,
1603 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1604 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1608 .callback = disable_acpi_pci,
1609 .ident = "Acer TravelMate 36x Laptop",
1611 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1612 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1616 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1617 * which includes some code which overrides all temperature
1618 * trip points to 16C if the INTIN2 input of the I/O APIC
1619 * is enabled. This input is incorrectly designated the
1620 * ISA IRQ 0 via an interrupt source override even though
1621 * it is wired to the output of the master 8259A and INTIN0
1622 * is not connected at all. Abandon any attempts to route
1623 * IRQ 0 through the I/O APIC therefore.
1626 .callback = dmi_disable_irq0_through_ioapic,
1627 .ident = "HP NX6125 laptop",
1629 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1630 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1634 .callback = dmi_disable_irq0_through_ioapic,
1635 .ident = "HP NX6325 laptop",
1637 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1638 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1642 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1643 * which includes some code which overrides all temperature
1644 * trip points to 16C if the INTIN2 input of the I/O APIC
1645 * is enabled. This input is incorrectly designated the
1646 * ISA IRQ 0 via an interrupt source override even though
1647 * it is wired to the output of the master 8259A and INTIN0
1648 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1649 * override in that cases.
1652 .callback = dmi_ignore_irq0_timer_override,
1653 .ident = "HP NX6125 laptop",
1655 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1656 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1660 .callback = dmi_ignore_irq0_timer_override,
1661 .ident = "HP NX6325 laptop",
1663 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1664 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1671 * acpi_boot_table_init() and acpi_boot_init()
1672 * called from setup_arch(), always.
1673 * 1. checksums all tables
1674 * 2. enumerates lapics
1675 * 3. enumerates io-apics
1677 * acpi_table_init() is separate to allow reading SRAT without
1678 * other side effects.
1680 * side effects of acpi_boot_init:
1681 * acpi_lapic = 1 if LAPIC found
1682 * acpi_ioapic = 1 if IOAPIC found
1683 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1684 * if acpi_blacklisted() acpi_disabled = 1;
1685 * acpi_irq_model=...
1688 * return value: (currently ignored)
1693 int __init acpi_boot_table_init(void)
1697 dmi_check_system(acpi_dmi_table);
1700 * If acpi_disabled, bail out
1701 * One exception: acpi=ht continues far enough to enumerate LAPICs
1703 if (acpi_disabled && !acpi_ht)
1707 * Initialize the ACPI boot-time table parser.
1709 error = acpi_table_init();
1715 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1718 * blacklist may disable ACPI entirely
1720 error = acpi_blacklisted();
1723 printk(KERN_WARNING PREFIX "acpi=force override\n");
1725 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1734 int __init early_acpi_boot_init(void)
1737 * If acpi_disabled, bail out
1738 * One exception: acpi=ht continues far enough to enumerate LAPICs
1740 if (acpi_disabled && !acpi_ht)
1744 * Process the Multiple APIC Description Table (MADT), if present
1746 early_acpi_process_madt();
1751 int __init acpi_boot_init(void)
1754 * If acpi_disabled, bail out
1755 * One exception: acpi=ht continues far enough to enumerate LAPICs
1757 if (acpi_disabled && !acpi_ht)
1760 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1763 * set sci_int and PM timer address
1765 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1768 * Process the Multiple APIC Description Table (MADT), if present
1770 acpi_process_madt();
1772 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1777 static int __init parse_acpi(char *arg)
1782 /* "acpi=off" disables both ACPI table parsing and interpreter */
1783 if (strcmp(arg, "off") == 0) {
1786 /* acpi=force to over-ride black-list */
1787 else if (strcmp(arg, "force") == 0) {
1792 /* acpi=strict disables out-of-spec workarounds */
1793 else if (strcmp(arg, "strict") == 0) {
1796 /* Limit ACPI just to boot-time to enable HT */
1797 else if (strcmp(arg, "ht") == 0) {
1802 /* "acpi=noirq" disables ACPI interrupt routing */
1803 else if (strcmp(arg, "noirq") == 0) {
1806 /* Core will printk when we return error. */
1811 early_param("acpi", parse_acpi);
1813 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1814 static int __init parse_pci(char *arg)
1816 if (arg && strcmp(arg, "noacpi") == 0)
1820 early_param("pci", parse_pci);
1822 int __init acpi_mps_check(void)
1824 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1825 /* mptable code is not built-in*/
1826 if (acpi_disabled || acpi_noirq) {
1827 printk(KERN_WARNING "MPS support code is not built-in.\n"
1828 "Using acpi=off or acpi=noirq or pci=noacpi "
1829 "may have problem\n");
1836 #ifdef CONFIG_X86_IO_APIC
1837 static int __init parse_acpi_skip_timer_override(char *arg)
1839 acpi_skip_timer_override = 1;
1842 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1844 static int __init parse_acpi_use_timer_override(char *arg)
1846 acpi_use_timer_override = 1;
1849 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1850 #endif /* CONFIG_X86_IO_APIC */
1852 static int __init setup_acpi_sci(char *s)
1856 if (!strcmp(s, "edge"))
1857 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1858 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1859 else if (!strcmp(s, "level"))
1860 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1861 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1862 else if (!strcmp(s, "high"))
1863 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1864 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1865 else if (!strcmp(s, "low"))
1866 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1867 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1872 early_param("acpi_sci", setup_acpi_sci);
1874 int __acpi_acquire_global_lock(unsigned int *lock)
1876 unsigned int old, new, val;
1879 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1880 val = cmpxchg(lock, old, new);
1881 } while (unlikely (val != old));
1882 return (new < 3) ? -1 : 0;
1885 int __acpi_release_global_lock(unsigned int *lock)
1887 unsigned int old, new, val;
1891 val = cmpxchg(lock, old, new);
1892 } while (unlikely (val != old));