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>
43 #ifdef CONFIG_X86_LOCAL_APIC
44 # include <mach_apic.h>
47 static int __initdata acpi_force = 0;
50 int acpi_disabled = 0;
52 int acpi_disabled = 1;
54 EXPORT_SYMBOL(acpi_disabled);
58 #include <asm/proto.h>
59 #include <asm/genapic.h>
63 #ifdef CONFIG_X86_LOCAL_APIC
64 #include <mach_apic.h>
65 #include <mach_mpparse.h>
66 #endif /* CONFIG_X86_LOCAL_APIC */
70 #define BAD_MADT_ENTRY(entry, end) ( \
71 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
72 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
74 #define PREFIX "ACPI: "
76 int acpi_noirq; /* skip ACPI IRQ initialization */
77 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
78 EXPORT_SYMBOL(acpi_pci_disabled);
79 int acpi_ht __initdata = 1; /* enable HT */
85 u8 acpi_sci_flags __initdata;
86 int acpi_sci_override_gsi __initdata;
87 int acpi_skip_timer_override __initdata;
88 int acpi_use_timer_override __initdata;
90 #ifdef CONFIG_X86_LOCAL_APIC
91 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
94 #ifndef __HAVE_ARCH_CMPXCHG
95 #warning ACPI uses CMPXCHG, i486 and later hardware
98 /* --------------------------------------------------------------------------
99 Boot-time Configuration
100 -------------------------------------------------------------------------- */
103 * The default interrupt routing model is PIC (8259). This gets
104 * overridden if IOAPICs are enumerated (below).
106 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
110 /* rely on all ACPI tables being in the direct mapping */
111 char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
113 if (!phys_addr || !size)
116 if (phys_addr+size <= (max_pfn_mapped << PAGE_SHIFT) + PAGE_SIZE)
117 return __va(phys_addr);
125 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
126 * to map the target physical address. The problem is that set_fixmap()
127 * provides a single page, and it is possible that the page is not
129 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
130 * i.e. until the next __va_range() call.
132 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
133 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
134 * count idx down while incrementing the phys address.
136 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
138 unsigned long base, offset, mapped_size;
141 if (phys + size < 8 * 1024 * 1024)
144 offset = phys & (PAGE_SIZE - 1);
145 mapped_size = PAGE_SIZE - offset;
146 set_fixmap(FIX_ACPI_END, phys);
147 base = fix_to_virt(FIX_ACPI_END);
150 * Most cases can be covered by the below.
153 while (mapped_size < size) {
154 if (--idx < FIX_ACPI_BEGIN)
155 return NULL; /* cannot handle this */
157 set_fixmap(idx, phys);
158 mapped_size += PAGE_SIZE;
161 return ((unsigned char *)base + offset);
165 #ifdef CONFIG_PCI_MMCONFIG
166 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
167 struct acpi_mcfg_allocation *pci_mmcfg_config;
168 int pci_mmcfg_config_num;
170 int __init acpi_parse_mcfg(struct acpi_table_header *header)
172 struct acpi_table_mcfg *mcfg;
179 mcfg = (struct acpi_table_mcfg *)header;
181 /* how many config structures do we have */
182 pci_mmcfg_config_num = 0;
183 i = header->length - sizeof(struct acpi_table_mcfg);
184 while (i >= sizeof(struct acpi_mcfg_allocation)) {
185 ++pci_mmcfg_config_num;
186 i -= sizeof(struct acpi_mcfg_allocation);
188 if (pci_mmcfg_config_num == 0) {
189 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
193 config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
194 pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
195 if (!pci_mmcfg_config) {
196 printk(KERN_WARNING PREFIX
197 "No memory for MCFG config tables\n");
201 memcpy(pci_mmcfg_config, &mcfg[1], config_size);
202 for (i = 0; i < pci_mmcfg_config_num; ++i) {
203 if (pci_mmcfg_config[i].address > 0xFFFFFFFF) {
204 printk(KERN_ERR PREFIX
205 "MMCONFIG not in low 4GB of memory\n");
206 kfree(pci_mmcfg_config);
207 pci_mmcfg_config_num = 0;
214 #endif /* CONFIG_PCI_MMCONFIG */
216 #ifdef CONFIG_X86_LOCAL_APIC
217 static int __init acpi_parse_madt(struct acpi_table_header *table)
219 struct acpi_table_madt *madt = NULL;
224 madt = (struct acpi_table_madt *)table;
226 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
231 acpi_lapic_addr = (u64) madt->address;
233 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
237 acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
243 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
245 struct acpi_madt_local_apic *processor = NULL;
247 processor = (struct acpi_madt_local_apic *)header;
249 if (BAD_MADT_ENTRY(processor, end))
252 acpi_table_print_madt_entry(header);
255 * We need to register disabled CPU as well to permit
256 * counting disabled CPUs. This allows us to size
257 * cpus_possible_map more accurately, to permit
258 * to not preallocating memory for all NR_CPUS
259 * when we use CPU hotplug.
261 mp_register_lapic(processor->id, /* APIC ID */
262 processor->lapic_flags & ACPI_MADT_ENABLED); /* Enabled? */
268 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
270 struct acpi_madt_local_sapic *processor = NULL;
272 processor = (struct acpi_madt_local_sapic *)header;
274 if (BAD_MADT_ENTRY(processor, end))
277 acpi_table_print_madt_entry(header);
279 mp_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
280 processor->lapic_flags & ACPI_MADT_ENABLED); /* Enabled? */
286 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
287 const unsigned long end)
289 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
291 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
293 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
296 acpi_lapic_addr = lapic_addr_ovr->address;
302 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
304 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
306 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
308 if (BAD_MADT_ENTRY(lapic_nmi, end))
311 acpi_table_print_madt_entry(header);
313 if (lapic_nmi->lint != 1)
314 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
319 #endif /*CONFIG_X86_LOCAL_APIC */
321 #ifdef CONFIG_X86_IO_APIC
324 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
326 struct acpi_madt_io_apic *ioapic = NULL;
328 ioapic = (struct acpi_madt_io_apic *)header;
330 if (BAD_MADT_ENTRY(ioapic, end))
333 acpi_table_print_madt_entry(header);
335 mp_register_ioapic(ioapic->id,
336 ioapic->address, ioapic->global_irq_base);
342 * Parse Interrupt Source Override for the ACPI SCI
344 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
346 if (trigger == 0) /* compatible SCI trigger is level */
349 if (polarity == 0) /* compatible SCI polarity is low */
352 /* Command-line over-ride via acpi_sci= */
353 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
354 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
356 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
357 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
360 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
361 * If GSI is < 16, this will update its flags,
362 * else it will create a new mp_irqs[] entry.
364 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
367 * stash over-ride to indicate we've been here
368 * and for later update of acpi_gbl_FADT
370 acpi_sci_override_gsi = gsi;
375 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
376 const unsigned long end)
378 struct acpi_madt_interrupt_override *intsrc = NULL;
380 intsrc = (struct acpi_madt_interrupt_override *)header;
382 if (BAD_MADT_ENTRY(intsrc, end))
385 acpi_table_print_madt_entry(header);
387 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
388 acpi_sci_ioapic_setup(intsrc->global_irq,
389 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
390 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
394 if (acpi_skip_timer_override &&
395 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
396 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
400 mp_override_legacy_irq(intsrc->source_irq,
401 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
402 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
409 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
411 struct acpi_madt_nmi_source *nmi_src = NULL;
413 nmi_src = (struct acpi_madt_nmi_source *)header;
415 if (BAD_MADT_ENTRY(nmi_src, end))
418 acpi_table_print_madt_entry(header);
420 /* TBD: Support nimsrc entries? */
425 #endif /* CONFIG_X86_IO_APIC */
428 * acpi_pic_sci_set_trigger()
430 * use ELCR to set PIC-mode trigger type for SCI
432 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
433 * it may require Edge Trigger -- use "acpi_sci=edge"
435 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
436 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
437 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
438 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
441 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
443 unsigned int mask = 1 << irq;
444 unsigned int old, new;
446 /* Real old ELCR mask */
447 old = inb(0x4d0) | (inb(0x4d1) << 8);
450 * If we use ACPI to set PCI IRQs, then we should clear ELCR
451 * since we will set it correctly as we enable the PCI irq
454 new = acpi_noirq ? old : 0;
457 * Update SCI information in the ELCR, it isn't in the PCI
461 case 1: /* Edge - clear */
464 case 3: /* Level - set */
472 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
474 outb(new >> 8, 0x4d1);
477 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
484 * success: return IRQ number (>=0)
485 * failure: return < 0
487 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
490 unsigned int plat_gsi = gsi;
494 * Make sure all (legacy) PCI IRQs are set as level-triggered.
496 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
497 extern void eisa_set_level_irq(unsigned int irq);
499 if (triggering == ACPI_LEVEL_SENSITIVE)
500 eisa_set_level_irq(gsi);
504 #ifdef CONFIG_X86_IO_APIC
505 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
506 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
509 acpi_gsi_to_irq(plat_gsi, &irq);
514 * ACPI based hotplug support for CPU
516 #ifdef CONFIG_ACPI_HOTPLUG_CPU
518 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
520 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
521 union acpi_object *obj;
522 struct acpi_madt_local_apic *lapic;
523 cpumask_t tmp_map, new_map;
527 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
530 if (!buffer.length || !buffer.pointer)
533 obj = buffer.pointer;
534 if (obj->type != ACPI_TYPE_BUFFER ||
535 obj->buffer.length < sizeof(*lapic)) {
536 kfree(buffer.pointer);
540 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
542 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
543 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
544 kfree(buffer.pointer);
550 kfree(buffer.pointer);
551 buffer.length = ACPI_ALLOCATE_BUFFER;
552 buffer.pointer = NULL;
554 tmp_map = cpu_present_map;
555 mp_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
558 * If mp_register_lapic successfully generates a new logical cpu
559 * number, then the following will get us exactly what was mapped
561 cpus_andnot(new_map, cpu_present_map, tmp_map);
562 if (cpus_empty(new_map)) {
563 printk ("Unable to map lapic to logical cpu number\n");
567 cpu = first_cpu(new_map);
573 /* wrapper to silence section mismatch warning */
574 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
576 return _acpi_map_lsapic(handle, pcpu);
578 EXPORT_SYMBOL(acpi_map_lsapic);
580 int acpi_unmap_lsapic(int cpu)
582 per_cpu(x86_cpu_to_apicid, cpu) = -1;
583 cpu_clear(cpu, cpu_present_map);
589 EXPORT_SYMBOL(acpi_unmap_lsapic);
590 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
592 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
598 EXPORT_SYMBOL(acpi_register_ioapic);
600 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
606 EXPORT_SYMBOL(acpi_unregister_ioapic);
608 static int __init acpi_parse_sbf(struct acpi_table_header *table)
610 struct acpi_table_boot *sb;
612 sb = (struct acpi_table_boot *)table;
614 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
618 sbf_port = sb->cmos_index; /* Save CMOS port */
623 #ifdef CONFIG_HPET_TIMER
624 #include <asm/hpet.h>
626 static struct __initdata resource *hpet_res;
628 static int __init acpi_parse_hpet(struct acpi_table_header *table)
630 struct acpi_table_hpet *hpet_tbl;
632 hpet_tbl = (struct acpi_table_hpet *)table;
634 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
638 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
639 printk(KERN_WARNING PREFIX "HPET timers must be located in "
644 hpet_address = hpet_tbl->address.address;
647 * Some broken BIOSes advertise HPET at 0x0. We really do not
648 * want to allocate a resource there.
651 printk(KERN_WARNING PREFIX
652 "HPET id: %#x base: %#lx is invalid\n",
653 hpet_tbl->id, hpet_address);
658 * Some even more broken BIOSes advertise HPET at
659 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
662 if (hpet_address == 0xfed0000000000000UL) {
663 if (!hpet_force_user) {
664 printk(KERN_WARNING PREFIX "HPET id: %#x "
665 "base: 0xfed0000000000000 is bogus\n "
666 "try hpet=force on the kernel command line to "
667 "fix it up to 0xfed00000.\n", hpet_tbl->id);
671 printk(KERN_WARNING PREFIX
672 "HPET id: %#x base: 0xfed0000000000000 fixed up "
673 "to 0xfed00000.\n", hpet_tbl->id);
677 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
678 hpet_tbl->id, hpet_address);
681 * Allocate and initialize the HPET firmware resource for adding into
682 * the resource tree during the lateinit timeframe.
684 #define HPET_RESOURCE_NAME_SIZE 9
685 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
690 memset(hpet_res, 0, sizeof(*hpet_res));
691 hpet_res->name = (void *)&hpet_res[1];
692 hpet_res->flags = IORESOURCE_MEM;
693 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
696 hpet_res->start = hpet_address;
697 hpet_res->end = hpet_address + (1 * 1024) - 1;
703 * hpet_insert_resource inserts the HPET resources used into the resource
706 static __init int hpet_insert_resource(void)
711 return insert_resource(&iomem_resource, hpet_res);
714 late_initcall(hpet_insert_resource);
717 #define acpi_parse_hpet NULL
720 static int __init acpi_parse_fadt(struct acpi_table_header *table)
723 #ifdef CONFIG_X86_PM_TIMER
724 /* detect the location of the ACPI PM Timer */
725 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
727 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
728 ACPI_ADR_SPACE_SYSTEM_IO)
731 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
733 * "X" fields are optional extensions to the original V1.0
734 * fields, so we must selectively expand V1.0 fields if the
735 * corresponding X field is zero.
738 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
741 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
744 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
750 #ifdef CONFIG_X86_LOCAL_APIC
752 * Parse LAPIC entries in MADT
753 * returns 0 on success, < 0 on error
755 static int __init acpi_parse_madt_lapic_entries(void)
763 * Note that the LAPIC address is obtained from the MADT (32-bit value)
764 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
768 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
769 acpi_parse_lapic_addr_ovr, 0);
771 printk(KERN_ERR PREFIX
772 "Error parsing LAPIC address override entry\n");
776 mp_register_lapic_address(acpi_lapic_addr);
778 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
779 acpi_parse_sapic, MAX_APICS);
782 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
783 acpi_parse_lapic, MAX_APICS);
785 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
786 /* TBD: Cleanup to allow fallback to MPS */
788 } else if (count < 0) {
789 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
790 /* TBD: Cleanup to allow fallback to MPS */
795 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
797 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
798 /* TBD: Cleanup to allow fallback to MPS */
803 #endif /* CONFIG_X86_LOCAL_APIC */
805 #ifdef CONFIG_X86_IO_APIC
807 * Parse IOAPIC related entries in MADT
808 * returns 0 on success, < 0 on error
810 static int __init acpi_parse_madt_ioapic_entries(void)
815 * ACPI interpreter is required to complete interrupt setup,
816 * so if it is off, don't enumerate the io-apics with ACPI.
817 * If MPS is present, it will handle them,
818 * otherwise the system will stay in PIC mode
820 if (acpi_disabled || acpi_noirq) {
828 * if "noapic" boot option, don't look for IO-APICs
830 if (skip_ioapic_setup) {
831 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
832 "due to 'noapic' option.\n");
837 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
840 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
842 } else if (count < 0) {
843 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
848 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
851 printk(KERN_ERR PREFIX
852 "Error parsing interrupt source overrides entry\n");
853 /* TBD: Cleanup to allow fallback to MPS */
858 * If BIOS did not supply an INT_SRC_OVR for the SCI
859 * pretend we got one so we can set the SCI flags.
861 if (!acpi_sci_override_gsi)
862 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
864 /* Fill in identity legacy mapings where no override */
865 mp_config_acpi_legacy_irqs();
868 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
871 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
872 /* TBD: Cleanup to allow fallback to MPS */
879 static inline int acpi_parse_madt_ioapic_entries(void)
883 #endif /* !CONFIG_X86_IO_APIC */
885 static void __init acpi_process_madt(void)
887 #ifdef CONFIG_X86_LOCAL_APIC
890 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
893 * Parse MADT LAPIC entries
895 error = acpi_parse_madt_lapic_entries();
899 #ifdef CONFIG_X86_GENERICARCH
900 generic_bigsmp_probe();
903 * Parse MADT IO-APIC entries
905 error = acpi_parse_madt_ioapic_entries();
907 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
908 acpi_irq_balance_set(NULL);
911 smp_found_config = 1;
912 setup_apic_routing();
915 if (error == -EINVAL) {
917 * Dell Precision Workstation 410, 610 come here.
919 printk(KERN_ERR PREFIX
920 "Invalid BIOS MADT, disabling ACPI\n");
930 static int __init disable_acpi_irq(const struct dmi_system_id *d)
933 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
940 static int __init disable_acpi_pci(const struct dmi_system_id *d)
943 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
950 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
953 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
957 "Warning: DMI blacklist says broken, but acpi forced\n");
963 * Limit ACPI to CPU enumeration for HT
965 static int __init force_acpi_ht(const struct dmi_system_id *d)
968 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
974 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
980 * If your system is blacklisted here, but you find that acpi=force
981 * works for you, please contact acpi-devel@sourceforge.net
983 static struct dmi_system_id __initdata acpi_dmi_table[] = {
985 * Boxes that need ACPI disabled
988 .callback = dmi_disable_acpi,
989 .ident = "IBM Thinkpad",
991 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
992 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
997 * Boxes that need acpi=ht
1000 .callback = force_acpi_ht,
1001 .ident = "FSC Primergy T850",
1003 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1004 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1008 .callback = force_acpi_ht,
1009 .ident = "HP VISUALIZE NT Workstation",
1011 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1012 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1016 .callback = force_acpi_ht,
1017 .ident = "Compaq Workstation W8000",
1019 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1020 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1024 .callback = force_acpi_ht,
1025 .ident = "ASUS P4B266",
1027 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1028 DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1032 .callback = force_acpi_ht,
1033 .ident = "ASUS P2B-DS",
1035 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1036 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1040 .callback = force_acpi_ht,
1041 .ident = "ASUS CUR-DLS",
1043 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1044 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1048 .callback = force_acpi_ht,
1049 .ident = "ABIT i440BX-W83977",
1051 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1052 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1056 .callback = force_acpi_ht,
1057 .ident = "IBM Bladecenter",
1059 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1060 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1064 .callback = force_acpi_ht,
1065 .ident = "IBM eServer xSeries 360",
1067 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1068 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1072 .callback = force_acpi_ht,
1073 .ident = "IBM eserver xSeries 330",
1075 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1076 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1080 .callback = force_acpi_ht,
1081 .ident = "IBM eserver xSeries 440",
1083 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1084 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1089 * Boxes that need ACPI PCI IRQ routing disabled
1092 .callback = disable_acpi_irq,
1093 .ident = "ASUS A7V",
1095 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1096 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1097 /* newer BIOS, Revision 1011, does work */
1098 DMI_MATCH(DMI_BIOS_VERSION,
1099 "ASUS A7V ACPI BIOS Revision 1007"),
1104 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1105 * for LPC bridge, which is needed for the PCI
1106 * interrupt links to work. DSDT fix is in bug 5966.
1107 * 2645, 2646 model numbers are shared with 600/600E/600X
1109 .callback = disable_acpi_irq,
1110 .ident = "IBM Thinkpad 600 Series 2645",
1112 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1113 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1117 .callback = disable_acpi_irq,
1118 .ident = "IBM Thinkpad 600 Series 2646",
1120 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1121 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1125 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1128 .callback = disable_acpi_pci,
1129 .ident = "ASUS PR-DLS",
1131 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1132 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1133 DMI_MATCH(DMI_BIOS_VERSION,
1134 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1135 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1139 .callback = disable_acpi_pci,
1140 .ident = "Acer TravelMate 36x Laptop",
1142 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1143 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1149 #endif /* __i386__ */
1152 * acpi_boot_table_init() and acpi_boot_init()
1153 * called from setup_arch(), always.
1154 * 1. checksums all tables
1155 * 2. enumerates lapics
1156 * 3. enumerates io-apics
1158 * acpi_table_init() is separate to allow reading SRAT without
1159 * other side effects.
1161 * side effects of acpi_boot_init:
1162 * acpi_lapic = 1 if LAPIC found
1163 * acpi_ioapic = 1 if IOAPIC found
1164 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1165 * if acpi_blacklisted() acpi_disabled = 1;
1166 * acpi_irq_model=...
1169 * return value: (currently ignored)
1174 int __init acpi_boot_table_init(void)
1179 dmi_check_system(acpi_dmi_table);
1183 * If acpi_disabled, bail out
1184 * One exception: acpi=ht continues far enough to enumerate LAPICs
1186 if (acpi_disabled && !acpi_ht)
1190 * Initialize the ACPI boot-time table parser.
1192 error = acpi_table_init();
1198 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1201 * blacklist may disable ACPI entirely
1203 error = acpi_blacklisted();
1206 printk(KERN_WARNING PREFIX "acpi=force override\n");
1208 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1217 int __init acpi_boot_init(void)
1220 * If acpi_disabled, bail out
1221 * One exception: acpi=ht continues far enough to enumerate LAPICs
1223 if (acpi_disabled && !acpi_ht)
1226 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1229 * set sci_int and PM timer address
1231 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1234 * Process the Multiple APIC Description Table (MADT), if present
1236 acpi_process_madt();
1238 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1243 static int __init parse_acpi(char *arg)
1248 /* "acpi=off" disables both ACPI table parsing and interpreter */
1249 if (strcmp(arg, "off") == 0) {
1252 /* acpi=force to over-ride black-list */
1253 else if (strcmp(arg, "force") == 0) {
1258 /* acpi=strict disables out-of-spec workarounds */
1259 else if (strcmp(arg, "strict") == 0) {
1262 /* Limit ACPI just to boot-time to enable HT */
1263 else if (strcmp(arg, "ht") == 0) {
1268 /* "acpi=noirq" disables ACPI interrupt routing */
1269 else if (strcmp(arg, "noirq") == 0) {
1272 /* Core will printk when we return error. */
1277 early_param("acpi", parse_acpi);
1279 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1280 static int __init parse_pci(char *arg)
1282 if (arg && strcmp(arg, "noacpi") == 0)
1286 early_param("pci", parse_pci);
1288 #ifdef CONFIG_X86_IO_APIC
1289 static int __init parse_acpi_skip_timer_override(char *arg)
1291 acpi_skip_timer_override = 1;
1294 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1296 static int __init parse_acpi_use_timer_override(char *arg)
1298 acpi_use_timer_override = 1;
1301 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1302 #endif /* CONFIG_X86_IO_APIC */
1304 static int __init setup_acpi_sci(char *s)
1308 if (!strcmp(s, "edge"))
1309 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1310 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1311 else if (!strcmp(s, "level"))
1312 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1313 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1314 else if (!strcmp(s, "high"))
1315 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1316 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1317 else if (!strcmp(s, "low"))
1318 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1319 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1324 early_param("acpi_sci", setup_acpi_sci);
1326 int __acpi_acquire_global_lock(unsigned int *lock)
1328 unsigned int old, new, val;
1331 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1332 val = cmpxchg(lock, old, new);
1333 } while (unlikely (val != old));
1334 return (new < 3) ? -1 : 0;
1337 int __acpi_release_global_lock(unsigned int *lock)
1339 unsigned int old, new, val;
1343 val = cmpxchg(lock, old, new);
1344 } while (unlikely (val != old));