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/efi.h>
29 #include <linux/cpumask.h>
30 #include <linux/module.h>
31 #include <linux/dmi.h>
32 #include <linux/irq.h>
33 #include <linux/bootmem.h>
34 #include <linux/ioport.h>
36 #include <asm/pgtable.h>
37 #include <asm/io_apic.h>
40 #include <asm/mpspec.h>
42 static int __initdata acpi_force = 0;
45 int acpi_disabled = 0;
47 int acpi_disabled = 1;
49 EXPORT_SYMBOL(acpi_disabled);
53 #include <asm/proto.h>
55 static inline int acpi_madt_oem_check(char *oem_id, char *oem_table_id) { return 0; }
60 #ifdef CONFIG_X86_LOCAL_APIC
61 #include <mach_apic.h>
62 #include <mach_mpparse.h>
63 #endif /* CONFIG_X86_LOCAL_APIC */
67 #define BAD_MADT_ENTRY(entry, end) ( \
68 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
69 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
71 #define PREFIX "ACPI: "
73 int acpi_noirq; /* skip ACPI IRQ initialization */
74 int acpi_pci_disabled __initdata; /* skip ACPI PCI scan and IRQ initialization */
75 int acpi_ht __initdata = 1; /* enable HT */
80 EXPORT_SYMBOL(acpi_strict);
82 u8 acpi_sci_flags __initdata;
83 int acpi_sci_override_gsi __initdata;
84 int acpi_skip_timer_override __initdata;
85 int acpi_use_timer_override __initdata;
87 #ifdef CONFIG_X86_LOCAL_APIC
88 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
91 #ifndef __HAVE_ARCH_CMPXCHG
92 #warning ACPI uses CMPXCHG, i486 and later hardware
95 #define MAX_MADT_ENTRIES 256
96 u8 x86_acpiid_to_apicid[MAX_MADT_ENTRIES] =
97 {[0 ... MAX_MADT_ENTRIES - 1] = 0xff };
98 EXPORT_SYMBOL(x86_acpiid_to_apicid);
100 /* --------------------------------------------------------------------------
101 Boot-time Configuration
102 -------------------------------------------------------------------------- */
105 * The default interrupt routing model is PIC (8259). This gets
106 * overriden if IOAPICs are enumerated (below).
108 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
112 /* rely on all ACPI tables being in the direct mapping */
113 char *__acpi_map_table(unsigned long phys_addr, unsigned long size)
115 if (!phys_addr || !size)
118 if (phys_addr+size <= (end_pfn_map << PAGE_SHIFT) + PAGE_SIZE)
119 return __va(phys_addr);
127 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
128 * to map the target physical address. The problem is that set_fixmap()
129 * provides a single page, and it is possible that the page is not
131 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
132 * i.e. until the next __va_range() call.
134 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
135 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
136 * count idx down while incrementing the phys address.
138 char *__acpi_map_table(unsigned long phys, unsigned long size)
140 unsigned long base, offset, mapped_size;
143 if (phys + size < 8 * 1024 * 1024)
146 offset = phys & (PAGE_SIZE - 1);
147 mapped_size = PAGE_SIZE - offset;
148 set_fixmap(FIX_ACPI_END, phys);
149 base = fix_to_virt(FIX_ACPI_END);
152 * Most cases can be covered by the below.
155 while (mapped_size < size) {
156 if (--idx < FIX_ACPI_BEGIN)
157 return NULL; /* cannot handle this */
159 set_fixmap(idx, phys);
160 mapped_size += PAGE_SIZE;
163 return ((unsigned char *)base + offset);
167 #ifdef CONFIG_PCI_MMCONFIG
168 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
169 struct acpi_mcfg_allocation *pci_mmcfg_config;
170 int pci_mmcfg_config_num;
172 int __init acpi_parse_mcfg(struct acpi_table_header *header)
174 struct acpi_table_mcfg *mcfg;
181 mcfg = (struct acpi_table_mcfg *)header;
183 /* how many config structures do we have */
184 pci_mmcfg_config_num = 0;
185 i = header->length - sizeof(struct acpi_table_mcfg);
186 while (i >= sizeof(struct acpi_mcfg_allocation)) {
187 ++pci_mmcfg_config_num;
188 i -= sizeof(struct acpi_mcfg_allocation);
190 if (pci_mmcfg_config_num == 0) {
191 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
195 config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
196 pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
197 if (!pci_mmcfg_config) {
198 printk(KERN_WARNING PREFIX
199 "No memory for MCFG config tables\n");
203 memcpy(pci_mmcfg_config, &mcfg[1], config_size);
204 for (i = 0; i < pci_mmcfg_config_num; ++i) {
205 if (pci_mmcfg_config[i].address > 0xFFFFFFFF) {
206 printk(KERN_ERR PREFIX
207 "MMCONFIG not in low 4GB of memory\n");
208 kfree(pci_mmcfg_config);
209 pci_mmcfg_config_num = 0;
216 #endif /* CONFIG_PCI_MMCONFIG */
218 #ifdef CONFIG_X86_LOCAL_APIC
219 static int __init acpi_parse_madt(struct acpi_table_header *table)
221 struct acpi_table_madt *madt = NULL;
226 madt = (struct acpi_table_madt *)table;
228 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
233 acpi_lapic_addr = (u64) madt->address;
235 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
239 acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
245 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
247 struct acpi_madt_local_apic *processor = NULL;
249 processor = (struct acpi_madt_local_apic *)header;
251 if (BAD_MADT_ENTRY(processor, end))
254 acpi_table_print_madt_entry(header);
256 /* Record local apic id only when enabled */
257 if (processor->lapic_flags & ACPI_MADT_ENABLED)
258 x86_acpiid_to_apicid[processor->processor_id] = processor->id;
261 * We need to register disabled CPU as well to permit
262 * counting disabled CPUs. This allows us to size
263 * cpus_possible_map more accurately, to permit
264 * to not preallocating memory for all NR_CPUS
265 * when we use CPU hotplug.
267 mp_register_lapic(processor->id, /* APIC ID */
268 processor->lapic_flags & ACPI_MADT_ENABLED); /* Enabled? */
274 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
275 const unsigned long end)
277 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
279 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
281 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
284 acpi_lapic_addr = lapic_addr_ovr->address;
290 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
292 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
294 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
296 if (BAD_MADT_ENTRY(lapic_nmi, end))
299 acpi_table_print_madt_entry(header);
301 if (lapic_nmi->lint != 1)
302 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
307 #endif /*CONFIG_X86_LOCAL_APIC */
309 #ifdef CONFIG_X86_IO_APIC
312 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
314 struct acpi_madt_io_apic *ioapic = NULL;
316 ioapic = (struct acpi_madt_io_apic *)header;
318 if (BAD_MADT_ENTRY(ioapic, end))
321 acpi_table_print_madt_entry(header);
323 mp_register_ioapic(ioapic->id,
324 ioapic->address, ioapic->global_irq_base);
330 * Parse Interrupt Source Override for the ACPI SCI
332 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
334 if (trigger == 0) /* compatible SCI trigger is level */
337 if (polarity == 0) /* compatible SCI polarity is low */
340 /* Command-line over-ride via acpi_sci= */
341 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
342 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
344 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
345 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
348 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
349 * If GSI is < 16, this will update its flags,
350 * else it will create a new mp_irqs[] entry.
352 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
355 * stash over-ride to indicate we've been here
356 * and for later update of acpi_gbl_FADT
358 acpi_sci_override_gsi = gsi;
363 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
364 const unsigned long end)
366 struct acpi_madt_interrupt_override *intsrc = NULL;
368 intsrc = (struct acpi_madt_interrupt_override *)header;
370 if (BAD_MADT_ENTRY(intsrc, end))
373 acpi_table_print_madt_entry(header);
375 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
376 acpi_sci_ioapic_setup(intsrc->global_irq,
377 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
378 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
382 if (acpi_skip_timer_override &&
383 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
384 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
388 mp_override_legacy_irq(intsrc->source_irq,
389 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
390 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
397 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
399 struct acpi_madt_nmi_source *nmi_src = NULL;
401 nmi_src = (struct acpi_madt_nmi_source *)header;
403 if (BAD_MADT_ENTRY(nmi_src, end))
406 acpi_table_print_madt_entry(header);
408 /* TBD: Support nimsrc entries? */
413 #endif /* CONFIG_X86_IO_APIC */
416 * acpi_pic_sci_set_trigger()
418 * use ELCR to set PIC-mode trigger type for SCI
420 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
421 * it may require Edge Trigger -- use "acpi_sci=edge"
423 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
424 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
425 * ECLR1 is IRQ's 0-7 (IRQ 0, 1, 2 must be 0)
426 * ECLR2 is IRQ's 8-15 (IRQ 8, 13 must be 0)
429 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
431 unsigned int mask = 1 << irq;
432 unsigned int old, new;
434 /* Real old ELCR mask */
435 old = inb(0x4d0) | (inb(0x4d1) << 8);
438 * If we use ACPI to set PCI irq's, then we should clear ELCR
439 * since we will set it correctly as we enable the PCI irq
442 new = acpi_noirq ? old : 0;
445 * Update SCI information in the ELCR, it isn't in the PCI
449 case 1: /* Edge - clear */
452 case 3: /* Level - set */
460 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
462 outb(new >> 8, 0x4d1);
465 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
472 * success: return IRQ number (>=0)
473 * failure: return < 0
475 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
478 unsigned int plat_gsi = gsi;
482 * Make sure all (legacy) PCI IRQs are set as level-triggered.
484 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
485 extern void eisa_set_level_irq(unsigned int irq);
487 if (triggering == ACPI_LEVEL_SENSITIVE)
488 eisa_set_level_irq(gsi);
492 #ifdef CONFIG_X86_IO_APIC
493 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
494 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
497 acpi_gsi_to_irq(plat_gsi, &irq);
501 EXPORT_SYMBOL(acpi_register_gsi);
504 * ACPI based hotplug support for CPU
506 #ifdef CONFIG_ACPI_HOTPLUG_CPU
507 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
509 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
510 union acpi_object *obj;
511 struct acpi_madt_local_apic *lapic;
512 cpumask_t tmp_map, new_map;
516 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
519 if (!buffer.length || !buffer.pointer)
522 obj = buffer.pointer;
523 if (obj->type != ACPI_TYPE_BUFFER ||
524 obj->buffer.length < sizeof(*lapic)) {
525 kfree(buffer.pointer);
529 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
531 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
532 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
533 kfree(buffer.pointer);
539 kfree(buffer.pointer);
540 buffer.length = ACPI_ALLOCATE_BUFFER;
541 buffer.pointer = NULL;
543 tmp_map = cpu_present_map;
544 mp_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
547 * If mp_register_lapic successfully generates a new logical cpu
548 * number, then the following will get us exactly what was mapped
550 cpus_andnot(new_map, cpu_present_map, tmp_map);
551 if (cpus_empty(new_map)) {
552 printk ("Unable to map lapic to logical cpu number\n");
556 cpu = first_cpu(new_map);
562 EXPORT_SYMBOL(acpi_map_lsapic);
564 int acpi_unmap_lsapic(int cpu)
568 for_each_possible_cpu(i) {
569 if (x86_acpiid_to_apicid[i] == x86_cpu_to_apicid[cpu]) {
570 x86_acpiid_to_apicid[i] = -1;
574 x86_cpu_to_apicid[cpu] = -1;
575 cpu_clear(cpu, cpu_present_map);
581 EXPORT_SYMBOL(acpi_unmap_lsapic);
582 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
584 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
590 EXPORT_SYMBOL(acpi_register_ioapic);
592 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
598 EXPORT_SYMBOL(acpi_unregister_ioapic);
600 static unsigned long __init
601 acpi_scan_rsdp(unsigned long start, unsigned long length)
603 unsigned long offset = 0;
604 unsigned long sig_len = sizeof("RSD PTR ") - 1;
607 * Scan all 16-byte boundaries of the physical memory region for the
610 for (offset = 0; offset < length; offset += 16) {
611 if (strncmp((char *)(phys_to_virt(start) + offset), "RSD PTR ", sig_len))
613 return (start + offset);
619 static int __init acpi_parse_sbf(struct acpi_table_header *table)
621 struct acpi_table_boot *sb;
623 sb = (struct acpi_table_boot *)table;
625 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
629 sbf_port = sb->cmos_index; /* Save CMOS port */
634 #ifdef CONFIG_HPET_TIMER
636 static int __init acpi_parse_hpet(struct acpi_table_header *table)
638 struct acpi_table_hpet *hpet_tbl;
639 struct resource *hpet_res;
640 resource_size_t res_start;
642 hpet_tbl = (struct acpi_table_hpet *)table;
644 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
648 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
649 printk(KERN_WARNING PREFIX "HPET timers must be located in "
654 #define HPET_RESOURCE_NAME_SIZE 9
655 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
657 memset(hpet_res, 0, sizeof(*hpet_res));
658 hpet_res->name = (void *)&hpet_res[1];
659 hpet_res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
660 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE,
661 "HPET %u", hpet_tbl->sequence);
662 hpet_res->end = (1 * 1024) - 1;
666 vxtime.hpet_address = hpet_tbl->address.address;
668 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
669 hpet_tbl->id, vxtime.hpet_address);
671 res_start = vxtime.hpet_address;
674 extern unsigned long hpet_address;
676 hpet_address = hpet_tbl->address.address;
677 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
678 hpet_tbl->id, hpet_address);
680 res_start = hpet_address;
685 hpet_res->start = res_start;
686 hpet_res->end += res_start;
687 insert_resource(&iomem_resource, hpet_res);
693 #define acpi_parse_hpet NULL
696 #ifdef CONFIG_X86_PM_TIMER
697 extern u32 pmtmr_ioport;
700 static int __init acpi_parse_fadt(struct acpi_table_header *table)
703 #ifdef CONFIG_X86_PM_TIMER
704 /* detect the location of the ACPI PM Timer */
705 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
707 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
708 ACPI_ADR_SPACE_SYSTEM_IO)
711 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
713 * "X" fields are optional extensions to the original V1.0
714 * fields, so we must selectively expand V1.0 fields if the
715 * corresponding X field is zero.
718 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
721 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
724 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
730 unsigned long __init acpi_find_rsdp(void)
732 unsigned long rsdp_phys = 0;
735 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
737 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
741 * Scan memory looking for the RSDP signature. First search EBDA (low
742 * memory) paragraphs and then search upper memory (E0000-FFFFF).
744 rsdp_phys = acpi_scan_rsdp(0, 0x400);
746 rsdp_phys = acpi_scan_rsdp(0xE0000, 0x20000);
751 #ifdef CONFIG_X86_LOCAL_APIC
753 * Parse LAPIC entries in MADT
754 * returns 0 on success, < 0 on error
756 static int __init acpi_parse_madt_lapic_entries(void)
764 * Note that the LAPIC address is obtained from the MADT (32-bit value)
765 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
769 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
770 acpi_parse_lapic_addr_ovr, 0);
772 printk(KERN_ERR PREFIX
773 "Error parsing LAPIC address override entry\n");
777 mp_register_lapic_address(acpi_lapic_addr);
779 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, acpi_parse_lapic,
782 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
783 /* TBD: Cleanup to allow fallback to MPS */
785 } else if (count < 0) {
786 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
787 /* TBD: Cleanup to allow fallback to MPS */
792 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
794 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
795 /* TBD: Cleanup to allow fallback to MPS */
800 #endif /* CONFIG_X86_LOCAL_APIC */
802 #ifdef CONFIG_X86_IO_APIC
804 * Parse IOAPIC related entries in MADT
805 * returns 0 on success, < 0 on error
807 static int __init acpi_parse_madt_ioapic_entries(void)
812 * ACPI interpreter is required to complete interrupt setup,
813 * so if it is off, don't enumerate the io-apics with ACPI.
814 * If MPS is present, it will handle them,
815 * otherwise the system will stay in PIC mode
817 if (acpi_disabled || acpi_noirq) {
825 * if "noapic" boot option, don't look for IO-APICs
827 if (skip_ioapic_setup) {
828 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
829 "due to 'noapic' option.\n");
834 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
837 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
839 } else if (count < 0) {
840 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
845 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
848 printk(KERN_ERR PREFIX
849 "Error parsing interrupt source overrides entry\n");
850 /* TBD: Cleanup to allow fallback to MPS */
855 * If BIOS did not supply an INT_SRC_OVR for the SCI
856 * pretend we got one so we can set the SCI flags.
858 if (!acpi_sci_override_gsi)
859 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
861 /* Fill in identity legacy mapings where no override */
862 mp_config_acpi_legacy_irqs();
865 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
868 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
869 /* TBD: Cleanup to allow fallback to MPS */
876 static inline int acpi_parse_madt_ioapic_entries(void)
880 #endif /* !CONFIG_X86_IO_APIC */
882 static void __init acpi_process_madt(void)
884 #ifdef CONFIG_X86_LOCAL_APIC
887 count = acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt);
891 * Parse MADT LAPIC entries
893 error = acpi_parse_madt_lapic_entries();
897 #ifdef CONFIG_X86_GENERICARCH
898 generic_bigsmp_probe();
901 * Parse MADT IO-APIC entries
903 error = acpi_parse_madt_ioapic_entries();
905 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
906 acpi_irq_balance_set(NULL);
909 smp_found_config = 1;
910 clustered_apic_check();
913 if (error == -EINVAL) {
915 * Dell Precision Workstation 410, 610 come here.
917 printk(KERN_ERR PREFIX
918 "Invalid BIOS MADT, disabling ACPI\n");
928 static int __init disable_acpi_irq(struct dmi_system_id *d)
931 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
938 static int __init disable_acpi_pci(struct dmi_system_id *d)
941 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
948 static int __init dmi_disable_acpi(struct dmi_system_id *d)
951 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
955 "Warning: DMI blacklist says broken, but acpi forced\n");
961 * Limit ACPI to CPU enumeration for HT
963 static int __init force_acpi_ht(struct dmi_system_id *d)
966 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
972 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
978 * If your system is blacklisted here, but you find that acpi=force
979 * works for you, please contact acpi-devel@sourceforge.net
981 static struct dmi_system_id __initdata acpi_dmi_table[] = {
983 * Boxes that need ACPI disabled
986 .callback = dmi_disable_acpi,
987 .ident = "IBM Thinkpad",
989 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
990 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
995 * Boxes that need acpi=ht
998 .callback = force_acpi_ht,
999 .ident = "FSC Primergy T850",
1001 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1002 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1006 .callback = force_acpi_ht,
1007 .ident = "DELL GX240",
1009 DMI_MATCH(DMI_BOARD_VENDOR, "Dell Computer Corporation"),
1010 DMI_MATCH(DMI_BOARD_NAME, "OptiPlex GX240"),
1014 .callback = force_acpi_ht,
1015 .ident = "HP VISUALIZE NT Workstation",
1017 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1018 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1022 .callback = force_acpi_ht,
1023 .ident = "Compaq Workstation W8000",
1025 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1026 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1030 .callback = force_acpi_ht,
1031 .ident = "ASUS P4B266",
1033 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1034 DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1038 .callback = force_acpi_ht,
1039 .ident = "ASUS P2B-DS",
1041 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1042 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1046 .callback = force_acpi_ht,
1047 .ident = "ASUS CUR-DLS",
1049 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1050 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1054 .callback = force_acpi_ht,
1055 .ident = "ABIT i440BX-W83977",
1057 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1058 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1062 .callback = force_acpi_ht,
1063 .ident = "IBM Bladecenter",
1065 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1066 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1070 .callback = force_acpi_ht,
1071 .ident = "IBM eServer xSeries 360",
1073 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1074 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1078 .callback = force_acpi_ht,
1079 .ident = "IBM eserver xSeries 330",
1081 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1082 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1086 .callback = force_acpi_ht,
1087 .ident = "IBM eserver xSeries 440",
1089 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1090 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1095 * Boxes that need ACPI PCI IRQ routing disabled
1098 .callback = disable_acpi_irq,
1099 .ident = "ASUS A7V",
1101 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1102 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1103 /* newer BIOS, Revision 1011, does work */
1104 DMI_MATCH(DMI_BIOS_VERSION,
1105 "ASUS A7V ACPI BIOS Revision 1007"),
1110 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1113 .callback = disable_acpi_pci,
1114 .ident = "ASUS PR-DLS",
1116 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1117 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1118 DMI_MATCH(DMI_BIOS_VERSION,
1119 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1120 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1124 .callback = disable_acpi_pci,
1125 .ident = "Acer TravelMate 36x Laptop",
1127 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1128 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1134 #endif /* __i386__ */
1137 * acpi_boot_table_init() and acpi_boot_init()
1138 * called from setup_arch(), always.
1139 * 1. checksums all tables
1140 * 2. enumerates lapics
1141 * 3. enumerates io-apics
1143 * acpi_table_init() is separate to allow reading SRAT without
1144 * other side effects.
1146 * side effects of acpi_boot_init:
1147 * acpi_lapic = 1 if LAPIC found
1148 * acpi_ioapic = 1 if IOAPIC found
1149 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1150 * if acpi_blacklisted() acpi_disabled = 1;
1151 * acpi_irq_model=...
1154 * return value: (currently ignored)
1159 int __init acpi_boot_table_init(void)
1164 dmi_check_system(acpi_dmi_table);
1168 * If acpi_disabled, bail out
1169 * One exception: acpi=ht continues far enough to enumerate LAPICs
1171 if (acpi_disabled && !acpi_ht)
1175 * Initialize the ACPI boot-time table parser.
1177 error = acpi_table_init();
1183 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1186 * blacklist may disable ACPI entirely
1188 error = acpi_blacklisted();
1191 printk(KERN_WARNING PREFIX "acpi=force override\n");
1193 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1202 int __init acpi_boot_init(void)
1205 * If acpi_disabled, bail out
1206 * One exception: acpi=ht continues far enough to enumerate LAPICs
1208 if (acpi_disabled && !acpi_ht)
1211 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1214 * set sci_int and PM timer address
1216 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1219 * Process the Multiple APIC Description Table (MADT), if present
1221 acpi_process_madt();
1223 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1228 static int __init parse_acpi(char *arg)
1233 /* "acpi=off" disables both ACPI table parsing and interpreter */
1234 if (strcmp(arg, "off") == 0) {
1237 /* acpi=force to over-ride black-list */
1238 else if (strcmp(arg, "force") == 0) {
1243 /* acpi=strict disables out-of-spec workarounds */
1244 else if (strcmp(arg, "strict") == 0) {
1247 /* Limit ACPI just to boot-time to enable HT */
1248 else if (strcmp(arg, "ht") == 0) {
1253 /* "acpi=noirq" disables ACPI interrupt routing */
1254 else if (strcmp(arg, "noirq") == 0) {
1257 /* Core will printk when we return error. */
1262 early_param("acpi", parse_acpi);
1264 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1265 static int __init parse_pci(char *arg)
1267 if (arg && strcmp(arg, "noacpi") == 0)
1271 early_param("pci", parse_pci);
1273 #ifdef CONFIG_X86_IO_APIC
1274 static int __init parse_acpi_skip_timer_override(char *arg)
1276 acpi_skip_timer_override = 1;
1279 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1281 static int __init parse_acpi_use_timer_override(char *arg)
1283 acpi_use_timer_override = 1;
1286 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1287 #endif /* CONFIG_X86_IO_APIC */
1289 static int __init setup_acpi_sci(char *s)
1293 if (!strcmp(s, "edge"))
1294 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1295 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1296 else if (!strcmp(s, "level"))
1297 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1298 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1299 else if (!strcmp(s, "high"))
1300 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1301 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1302 else if (!strcmp(s, "low"))
1303 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1304 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1309 early_param("acpi_sci", setup_acpi_sci);
1311 int __acpi_acquire_global_lock(unsigned int *lock)
1313 unsigned int old, new, val;
1316 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1317 val = cmpxchg(lock, old, new);
1318 } while (unlikely (val != old));
1319 return (new < 3) ? -1 : 0;
1322 int __acpi_release_global_lock(unsigned int *lock)
1324 unsigned int old, new, val;
1328 val = cmpxchg(lock, old, new);
1329 } while (unlikely (val != old));