2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
26 #include <linux/init.h>
27 #include <linux/acpi.h>
28 #include <linux/acpi_pmtmr.h>
29 #include <linux/efi.h>
30 #include <linux/cpumask.h>
31 #include <linux/module.h>
32 #include <linux/dmi.h>
33 #include <linux/irq.h>
34 #include <linux/bootmem.h>
35 #include <linux/ioport.h>
37 #include <asm/pgtable.h>
38 #include <asm/io_apic.h>
41 #include <asm/mpspec.h>
44 #ifdef CONFIG_X86_LOCAL_APIC
45 # include <mach_apic.h>
48 static int __initdata acpi_force = 0;
51 int acpi_disabled = 0;
53 int acpi_disabled = 1;
55 EXPORT_SYMBOL(acpi_disabled);
59 #include <asm/proto.h>
60 #include <asm/genapic.h>
64 #ifdef CONFIG_X86_LOCAL_APIC
65 #include <mach_apic.h>
66 #include <mach_mpparse.h>
67 #endif /* CONFIG_X86_LOCAL_APIC */
71 #define BAD_MADT_ENTRY(entry, end) ( \
72 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
73 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
75 #define PREFIX "ACPI: "
77 int acpi_noirq; /* skip ACPI IRQ initialization */
78 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
79 EXPORT_SYMBOL(acpi_pci_disabled);
80 int acpi_ht __initdata = 1; /* enable HT */
86 u8 acpi_sci_flags __initdata;
87 int acpi_sci_override_gsi __initdata;
88 int acpi_skip_timer_override __initdata;
89 int acpi_use_timer_override __initdata;
91 #ifdef CONFIG_X86_LOCAL_APIC
92 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
95 #ifndef __HAVE_ARCH_CMPXCHG
96 #warning ACPI uses CMPXCHG, i486 and later hardware
99 /* --------------------------------------------------------------------------
100 Boot-time Configuration
101 -------------------------------------------------------------------------- */
104 * The default interrupt routing model is PIC (8259). This gets
105 * overridden if IOAPICs are enumerated (below).
107 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
111 /* rely on all ACPI tables being in the direct mapping */
112 char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
114 if (!phys_addr || !size)
117 if (phys_addr+size <= (max_pfn_mapped << PAGE_SHIFT) + PAGE_SIZE)
118 return __va(phys_addr);
126 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
127 * to map the target physical address. The problem is that set_fixmap()
128 * provides a single page, and it is possible that the page is not
130 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
131 * i.e. until the next __va_range() call.
133 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
134 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
135 * count idx down while incrementing the phys address.
137 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
139 unsigned long base, offset, mapped_size;
142 if (phys + size < 8 * 1024 * 1024)
145 offset = phys & (PAGE_SIZE - 1);
146 mapped_size = PAGE_SIZE - offset;
147 set_fixmap(FIX_ACPI_END, phys);
148 base = fix_to_virt(FIX_ACPI_END);
151 * Most cases can be covered by the below.
154 while (mapped_size < size) {
155 if (--idx < FIX_ACPI_BEGIN)
156 return NULL; /* cannot handle this */
158 set_fixmap(idx, phys);
159 mapped_size += PAGE_SIZE;
162 return ((unsigned char *)base + offset);
166 #ifdef CONFIG_PCI_MMCONFIG
167 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
168 struct acpi_mcfg_allocation *pci_mmcfg_config;
169 int pci_mmcfg_config_num;
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);
203 for (i = 0; i < pci_mmcfg_config_num; ++i) {
204 if (pci_mmcfg_config[i].address > 0xFFFFFFFF) {
205 printk(KERN_ERR PREFIX
206 "MMCONFIG not in low 4GB of memory\n");
207 kfree(pci_mmcfg_config);
208 pci_mmcfg_config_num = 0;
215 #endif /* CONFIG_PCI_MMCONFIG */
217 #ifdef CONFIG_X86_LOCAL_APIC
218 static int __init acpi_parse_madt(struct acpi_table_header *table)
220 struct acpi_table_madt *madt = NULL;
225 madt = (struct acpi_table_madt *)table;
227 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
232 acpi_lapic_addr = (u64) madt->address;
234 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
238 acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
243 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
245 unsigned int ver = 0;
253 if (boot_cpu_physical_apicid != -1U)
254 ver = apic_version[boot_cpu_physical_apicid];
257 generic_processor_info(id, ver);
261 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
263 struct acpi_madt_local_apic *processor = NULL;
265 processor = (struct acpi_madt_local_apic *)header;
267 if (BAD_MADT_ENTRY(processor, end))
270 acpi_table_print_madt_entry(header);
273 * We need to register disabled CPU as well to permit
274 * counting disabled CPUs. This allows us to size
275 * cpus_possible_map more accurately, to permit
276 * to not preallocating memory for all NR_CPUS
277 * when we use CPU hotplug.
279 acpi_register_lapic(processor->id, /* APIC ID */
280 processor->lapic_flags & ACPI_MADT_ENABLED);
286 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
288 struct acpi_madt_local_sapic *processor = NULL;
290 processor = (struct acpi_madt_local_sapic *)header;
292 if (BAD_MADT_ENTRY(processor, end))
295 acpi_table_print_madt_entry(header);
297 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
298 processor->lapic_flags & ACPI_MADT_ENABLED);
304 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
305 const unsigned long end)
307 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
309 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
311 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
314 acpi_lapic_addr = lapic_addr_ovr->address;
320 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
322 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
324 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
326 if (BAD_MADT_ENTRY(lapic_nmi, end))
329 acpi_table_print_madt_entry(header);
331 if (lapic_nmi->lint != 1)
332 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
337 #endif /*CONFIG_X86_LOCAL_APIC */
339 #ifdef CONFIG_X86_IO_APIC
341 struct mp_ioapic_routing mp_ioapic_routing[MAX_IO_APICS];
344 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
346 struct acpi_madt_io_apic *ioapic = NULL;
348 ioapic = (struct acpi_madt_io_apic *)header;
350 if (BAD_MADT_ENTRY(ioapic, end))
353 acpi_table_print_madt_entry(header);
355 mp_register_ioapic(ioapic->id,
356 ioapic->address, ioapic->global_irq_base);
362 * Parse Interrupt Source Override for the ACPI SCI
364 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
366 if (trigger == 0) /* compatible SCI trigger is level */
369 if (polarity == 0) /* compatible SCI polarity is low */
372 /* Command-line over-ride via acpi_sci= */
373 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
374 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
376 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
377 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
380 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
381 * If GSI is < 16, this will update its flags,
382 * else it will create a new mp_irqs[] entry.
384 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
387 * stash over-ride to indicate we've been here
388 * and for later update of acpi_gbl_FADT
390 acpi_sci_override_gsi = gsi;
395 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
396 const unsigned long end)
398 struct acpi_madt_interrupt_override *intsrc = NULL;
400 intsrc = (struct acpi_madt_interrupt_override *)header;
402 if (BAD_MADT_ENTRY(intsrc, end))
405 acpi_table_print_madt_entry(header);
407 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
408 acpi_sci_ioapic_setup(intsrc->global_irq,
409 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
410 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
414 if (acpi_skip_timer_override &&
415 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
416 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
420 mp_override_legacy_irq(intsrc->source_irq,
421 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
422 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
429 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
431 struct acpi_madt_nmi_source *nmi_src = NULL;
433 nmi_src = (struct acpi_madt_nmi_source *)header;
435 if (BAD_MADT_ENTRY(nmi_src, end))
438 acpi_table_print_madt_entry(header);
440 /* TBD: Support nimsrc entries? */
445 #endif /* CONFIG_X86_IO_APIC */
448 * acpi_pic_sci_set_trigger()
450 * use ELCR to set PIC-mode trigger type for SCI
452 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
453 * it may require Edge Trigger -- use "acpi_sci=edge"
455 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
456 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
457 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
458 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
461 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
463 unsigned int mask = 1 << irq;
464 unsigned int old, new;
466 /* Real old ELCR mask */
467 old = inb(0x4d0) | (inb(0x4d1) << 8);
470 * If we use ACPI to set PCI IRQs, then we should clear ELCR
471 * since we will set it correctly as we enable the PCI irq
474 new = acpi_noirq ? old : 0;
477 * Update SCI information in the ELCR, it isn't in the PCI
481 case 1: /* Edge - clear */
484 case 3: /* Level - set */
492 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
494 outb(new >> 8, 0x4d1);
497 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
504 * success: return IRQ number (>=0)
505 * failure: return < 0
507 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
510 unsigned int plat_gsi = gsi;
514 * Make sure all (legacy) PCI IRQs are set as level-triggered.
516 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
517 if (triggering == ACPI_LEVEL_SENSITIVE)
518 eisa_set_level_irq(gsi);
522 #ifdef CONFIG_X86_IO_APIC
523 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
524 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
527 acpi_gsi_to_irq(plat_gsi, &irq);
532 * ACPI based hotplug support for CPU
534 #ifdef CONFIG_ACPI_HOTPLUG_CPU
536 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
538 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
539 union acpi_object *obj;
540 struct acpi_madt_local_apic *lapic;
541 cpumask_t tmp_map, new_map;
545 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
548 if (!buffer.length || !buffer.pointer)
551 obj = buffer.pointer;
552 if (obj->type != ACPI_TYPE_BUFFER ||
553 obj->buffer.length < sizeof(*lapic)) {
554 kfree(buffer.pointer);
558 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
560 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
561 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
562 kfree(buffer.pointer);
568 kfree(buffer.pointer);
569 buffer.length = ACPI_ALLOCATE_BUFFER;
570 buffer.pointer = NULL;
572 tmp_map = cpu_present_map;
573 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
576 * If mp_register_lapic successfully generates a new logical cpu
577 * number, then the following will get us exactly what was mapped
579 cpus_andnot(new_map, cpu_present_map, tmp_map);
580 if (cpus_empty(new_map)) {
581 printk ("Unable to map lapic to logical cpu number\n");
585 cpu = first_cpu(new_map);
591 /* wrapper to silence section mismatch warning */
592 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
594 return _acpi_map_lsapic(handle, pcpu);
596 EXPORT_SYMBOL(acpi_map_lsapic);
598 int acpi_unmap_lsapic(int cpu)
600 per_cpu(x86_cpu_to_apicid, cpu) = -1;
601 cpu_clear(cpu, cpu_present_map);
607 EXPORT_SYMBOL(acpi_unmap_lsapic);
608 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
610 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
616 EXPORT_SYMBOL(acpi_register_ioapic);
618 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
624 EXPORT_SYMBOL(acpi_unregister_ioapic);
626 static int __init acpi_parse_sbf(struct acpi_table_header *table)
628 struct acpi_table_boot *sb;
630 sb = (struct acpi_table_boot *)table;
632 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
636 sbf_port = sb->cmos_index; /* Save CMOS port */
641 #ifdef CONFIG_HPET_TIMER
642 #include <asm/hpet.h>
644 static struct __initdata resource *hpet_res;
646 static int __init acpi_parse_hpet(struct acpi_table_header *table)
648 struct acpi_table_hpet *hpet_tbl;
650 hpet_tbl = (struct acpi_table_hpet *)table;
652 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
656 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
657 printk(KERN_WARNING PREFIX "HPET timers must be located in "
662 hpet_address = hpet_tbl->address.address;
665 * Some broken BIOSes advertise HPET at 0x0. We really do not
666 * want to allocate a resource there.
669 printk(KERN_WARNING PREFIX
670 "HPET id: %#x base: %#lx is invalid\n",
671 hpet_tbl->id, hpet_address);
676 * Some even more broken BIOSes advertise HPET at
677 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
680 if (hpet_address == 0xfed0000000000000UL) {
681 if (!hpet_force_user) {
682 printk(KERN_WARNING PREFIX "HPET id: %#x "
683 "base: 0xfed0000000000000 is bogus\n "
684 "try hpet=force on the kernel command line to "
685 "fix it up to 0xfed00000.\n", hpet_tbl->id);
689 printk(KERN_WARNING PREFIX
690 "HPET id: %#x base: 0xfed0000000000000 fixed up "
691 "to 0xfed00000.\n", hpet_tbl->id);
695 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
696 hpet_tbl->id, hpet_address);
699 * Allocate and initialize the HPET firmware resource for adding into
700 * the resource tree during the lateinit timeframe.
702 #define HPET_RESOURCE_NAME_SIZE 9
703 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
705 hpet_res->name = (void *)&hpet_res[1];
706 hpet_res->flags = IORESOURCE_MEM;
707 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
710 hpet_res->start = hpet_address;
711 hpet_res->end = hpet_address + (1 * 1024) - 1;
717 * hpet_insert_resource inserts the HPET resources used into the resource
720 static __init int hpet_insert_resource(void)
725 return insert_resource(&iomem_resource, hpet_res);
728 late_initcall(hpet_insert_resource);
731 #define acpi_parse_hpet NULL
734 static int __init acpi_parse_fadt(struct acpi_table_header *table)
737 #ifdef CONFIG_X86_PM_TIMER
738 /* detect the location of the ACPI PM Timer */
739 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
741 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
742 ACPI_ADR_SPACE_SYSTEM_IO)
745 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
747 * "X" fields are optional extensions to the original V1.0
748 * fields, so we must selectively expand V1.0 fields if the
749 * corresponding X field is zero.
752 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
755 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
758 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
764 #ifdef CONFIG_X86_LOCAL_APIC
766 * Parse LAPIC entries in MADT
767 * returns 0 on success, < 0 on error
770 static void __init acpi_register_lapic_address(unsigned long address)
772 mp_lapic_addr = address;
774 set_fixmap_nocache(FIX_APIC_BASE, address);
775 if (boot_cpu_physical_apicid == -1U) {
776 boot_cpu_physical_apicid = GET_APIC_ID(read_apic_id());
778 apic_version[boot_cpu_physical_apicid] =
779 GET_APIC_VERSION(apic_read(APIC_LVR));
784 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
792 * Note that the LAPIC address is obtained from the MADT (32-bit value)
793 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
797 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
798 acpi_parse_lapic_addr_ovr, 0);
800 printk(KERN_ERR PREFIX
801 "Error parsing LAPIC address override entry\n");
805 acpi_register_lapic_address(acpi_lapic_addr);
810 static int __init acpi_parse_madt_lapic_entries(void)
818 * Note that the LAPIC address is obtained from the MADT (32-bit value)
819 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
823 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
824 acpi_parse_lapic_addr_ovr, 0);
826 printk(KERN_ERR PREFIX
827 "Error parsing LAPIC address override entry\n");
831 acpi_register_lapic_address(acpi_lapic_addr);
833 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
834 acpi_parse_sapic, MAX_APICS);
837 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
838 acpi_parse_lapic, MAX_APICS);
840 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
841 /* TBD: Cleanup to allow fallback to MPS */
843 } else if (count < 0) {
844 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
845 /* TBD: Cleanup to allow fallback to MPS */
850 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
852 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
853 /* TBD: Cleanup to allow fallback to MPS */
858 #endif /* CONFIG_X86_LOCAL_APIC */
860 #ifdef CONFIG_X86_IO_APIC
862 * Parse IOAPIC related entries in MADT
863 * returns 0 on success, < 0 on error
865 static int __init acpi_parse_madt_ioapic_entries(void)
870 * ACPI interpreter is required to complete interrupt setup,
871 * so if it is off, don't enumerate the io-apics with ACPI.
872 * If MPS is present, it will handle them,
873 * otherwise the system will stay in PIC mode
875 if (acpi_disabled || acpi_noirq) {
883 * if "noapic" boot option, don't look for IO-APICs
885 if (skip_ioapic_setup) {
886 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
887 "due to 'noapic' option.\n");
892 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
895 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
897 } else if (count < 0) {
898 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
903 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
906 printk(KERN_ERR PREFIX
907 "Error parsing interrupt source overrides entry\n");
908 /* TBD: Cleanup to allow fallback to MPS */
913 * If BIOS did not supply an INT_SRC_OVR for the SCI
914 * pretend we got one so we can set the SCI flags.
916 if (!acpi_sci_override_gsi)
917 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
919 /* Fill in identity legacy mapings where no override */
920 mp_config_acpi_legacy_irqs();
923 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
926 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
927 /* TBD: Cleanup to allow fallback to MPS */
934 static inline int acpi_parse_madt_ioapic_entries(void)
938 #endif /* !CONFIG_X86_IO_APIC */
940 static void __init early_acpi_process_madt(void)
942 #ifdef CONFIG_X86_LOCAL_APIC
945 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
948 * Parse MADT LAPIC entries
950 error = early_acpi_parse_madt_lapic_addr_ovr();
953 smp_found_config = 1;
955 if (error == -EINVAL) {
957 * Dell Precision Workstation 410, 610 come here.
959 printk(KERN_ERR PREFIX
960 "Invalid BIOS MADT, disabling ACPI\n");
967 static void __init acpi_process_madt(void)
969 #ifdef CONFIG_X86_LOCAL_APIC
972 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
975 * Parse MADT LAPIC entries
977 error = acpi_parse_madt_lapic_entries();
981 #ifdef CONFIG_X86_GENERICARCH
982 generic_bigsmp_probe();
985 * Parse MADT IO-APIC entries
987 error = acpi_parse_madt_ioapic_entries();
989 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
990 acpi_irq_balance_set(NULL);
993 smp_found_config = 1;
994 setup_apic_routing();
997 if (error == -EINVAL) {
999 * Dell Precision Workstation 410, 610 come here.
1001 printk(KERN_ERR PREFIX
1002 "Invalid BIOS MADT, disabling ACPI\n");
1012 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1015 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1022 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1025 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1032 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1035 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1039 "Warning: DMI blacklist says broken, but acpi forced\n");
1045 * Limit ACPI to CPU enumeration for HT
1047 static int __init force_acpi_ht(const struct dmi_system_id *d)
1050 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1056 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1062 * If your system is blacklisted here, but you find that acpi=force
1063 * works for you, please contact acpi-devel@sourceforge.net
1065 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1067 * Boxes that need ACPI disabled
1070 .callback = dmi_disable_acpi,
1071 .ident = "IBM Thinkpad",
1073 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1074 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1079 * Boxes that need acpi=ht
1082 .callback = force_acpi_ht,
1083 .ident = "FSC Primergy T850",
1085 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1086 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1090 .callback = force_acpi_ht,
1091 .ident = "HP VISUALIZE NT Workstation",
1093 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1094 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1098 .callback = force_acpi_ht,
1099 .ident = "Compaq Workstation W8000",
1101 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1102 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1106 .callback = force_acpi_ht,
1107 .ident = "ASUS P4B266",
1109 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1110 DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1114 .callback = force_acpi_ht,
1115 .ident = "ASUS P2B-DS",
1117 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1118 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1122 .callback = force_acpi_ht,
1123 .ident = "ASUS CUR-DLS",
1125 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1126 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1130 .callback = force_acpi_ht,
1131 .ident = "ABIT i440BX-W83977",
1133 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1134 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1138 .callback = force_acpi_ht,
1139 .ident = "IBM Bladecenter",
1141 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1142 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1146 .callback = force_acpi_ht,
1147 .ident = "IBM eServer xSeries 360",
1149 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1150 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1154 .callback = force_acpi_ht,
1155 .ident = "IBM eserver xSeries 330",
1157 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1158 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1162 .callback = force_acpi_ht,
1163 .ident = "IBM eserver xSeries 440",
1165 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1166 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1171 * Boxes that need ACPI PCI IRQ routing disabled
1174 .callback = disable_acpi_irq,
1175 .ident = "ASUS A7V",
1177 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1178 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1179 /* newer BIOS, Revision 1011, does work */
1180 DMI_MATCH(DMI_BIOS_VERSION,
1181 "ASUS A7V ACPI BIOS Revision 1007"),
1186 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1187 * for LPC bridge, which is needed for the PCI
1188 * interrupt links to work. DSDT fix is in bug 5966.
1189 * 2645, 2646 model numbers are shared with 600/600E/600X
1191 .callback = disable_acpi_irq,
1192 .ident = "IBM Thinkpad 600 Series 2645",
1194 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1195 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1199 .callback = disable_acpi_irq,
1200 .ident = "IBM Thinkpad 600 Series 2646",
1202 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1203 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1207 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1210 .callback = disable_acpi_pci,
1211 .ident = "ASUS PR-DLS",
1213 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1214 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1215 DMI_MATCH(DMI_BIOS_VERSION,
1216 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1217 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1221 .callback = disable_acpi_pci,
1222 .ident = "Acer TravelMate 36x Laptop",
1224 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1225 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1231 #endif /* __i386__ */
1234 * acpi_boot_table_init() and acpi_boot_init()
1235 * called from setup_arch(), always.
1236 * 1. checksums all tables
1237 * 2. enumerates lapics
1238 * 3. enumerates io-apics
1240 * acpi_table_init() is separate to allow reading SRAT without
1241 * other side effects.
1243 * side effects of acpi_boot_init:
1244 * acpi_lapic = 1 if LAPIC found
1245 * acpi_ioapic = 1 if IOAPIC found
1246 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1247 * if acpi_blacklisted() acpi_disabled = 1;
1248 * acpi_irq_model=...
1251 * return value: (currently ignored)
1256 int __init acpi_boot_table_init(void)
1261 dmi_check_system(acpi_dmi_table);
1265 * If acpi_disabled, bail out
1266 * One exception: acpi=ht continues far enough to enumerate LAPICs
1268 if (acpi_disabled && !acpi_ht)
1272 * Initialize the ACPI boot-time table parser.
1274 error = acpi_table_init();
1280 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1283 * blacklist may disable ACPI entirely
1285 error = acpi_blacklisted();
1288 printk(KERN_WARNING PREFIX "acpi=force override\n");
1290 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1299 int __init early_acpi_boot_init(void)
1302 * If acpi_disabled, bail out
1303 * One exception: acpi=ht continues far enough to enumerate LAPICs
1305 if (acpi_disabled && !acpi_ht)
1309 * Process the Multiple APIC Description Table (MADT), if present
1311 early_acpi_process_madt();
1316 int __init acpi_boot_init(void)
1319 * If acpi_disabled, bail out
1320 * One exception: acpi=ht continues far enough to enumerate LAPICs
1322 if (acpi_disabled && !acpi_ht)
1325 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1328 * set sci_int and PM timer address
1330 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1333 * Process the Multiple APIC Description Table (MADT), if present
1335 acpi_process_madt();
1337 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1342 static int __init parse_acpi(char *arg)
1347 /* "acpi=off" disables both ACPI table parsing and interpreter */
1348 if (strcmp(arg, "off") == 0) {
1351 /* acpi=force to over-ride black-list */
1352 else if (strcmp(arg, "force") == 0) {
1357 /* acpi=strict disables out-of-spec workarounds */
1358 else if (strcmp(arg, "strict") == 0) {
1361 /* Limit ACPI just to boot-time to enable HT */
1362 else if (strcmp(arg, "ht") == 0) {
1367 /* "acpi=noirq" disables ACPI interrupt routing */
1368 else if (strcmp(arg, "noirq") == 0) {
1371 /* Core will printk when we return error. */
1376 early_param("acpi", parse_acpi);
1378 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1379 static int __init parse_pci(char *arg)
1381 if (arg && strcmp(arg, "noacpi") == 0)
1385 early_param("pci", parse_pci);
1387 #ifdef CONFIG_X86_IO_APIC
1388 static int __init parse_acpi_skip_timer_override(char *arg)
1390 acpi_skip_timer_override = 1;
1393 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1395 static int __init parse_acpi_use_timer_override(char *arg)
1397 acpi_use_timer_override = 1;
1400 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1401 #endif /* CONFIG_X86_IO_APIC */
1403 static int __init setup_acpi_sci(char *s)
1407 if (!strcmp(s, "edge"))
1408 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1409 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1410 else if (!strcmp(s, "level"))
1411 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1412 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1413 else if (!strcmp(s, "high"))
1414 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1415 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1416 else if (!strcmp(s, "low"))
1417 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1418 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1423 early_param("acpi_sci", setup_acpi_sci);
1425 int __acpi_acquire_global_lock(unsigned int *lock)
1427 unsigned int old, new, val;
1430 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1431 val = cmpxchg(lock, old, new);
1432 } while (unlikely (val != old));
1433 return (new < 3) ? -1 : 0;
1436 int __acpi_release_global_lock(unsigned int *lock)
1438 unsigned int old, new, val;
1442 val = cmpxchg(lock, old, new);
1443 } while (unlikely (val != old));