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/module.h>
30 #include <linux/dmi.h>
31 #include <linux/irq.h>
33 #include <asm/pgtable.h>
34 #include <asm/io_apic.h>
37 #include <asm/mpspec.h>
39 static int __initdata acpi_force = 0;
42 int acpi_disabled = 0;
44 int acpi_disabled = 1;
46 EXPORT_SYMBOL(acpi_disabled);
50 #include <asm/proto.h>
52 static inline int acpi_madt_oem_check(char *oem_id, char *oem_table_id) { return 0; }
57 #ifdef CONFIG_X86_LOCAL_APIC
58 #include <mach_apic.h>
59 #include <mach_mpparse.h>
60 #endif /* CONFIG_X86_LOCAL_APIC */
62 static inline int gsi_irq_sharing(int gsi) { return gsi; }
66 #define BAD_MADT_ENTRY(entry, end) ( \
67 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
68 ((acpi_table_entry_header *)entry)->length < sizeof(*entry))
70 #define PREFIX "ACPI: "
72 int acpi_noirq __initdata; /* skip ACPI IRQ initialization */
73 int acpi_pci_disabled __initdata; /* skip ACPI PCI scan and IRQ initialization */
74 int acpi_ht __initdata = 1; /* enable HT */
79 EXPORT_SYMBOL(acpi_strict);
81 acpi_interrupt_flags acpi_sci_flags __initdata;
82 int acpi_sci_override_gsi __initdata;
83 int acpi_skip_timer_override __initdata;
85 #ifdef CONFIG_X86_LOCAL_APIC
86 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
89 #ifndef __HAVE_ARCH_CMPXCHG
90 #warning ACPI uses CMPXCHG, i486 and later hardware
93 #define MAX_MADT_ENTRIES 256
94 u8 x86_acpiid_to_apicid[MAX_MADT_ENTRIES] =
95 {[0 ... MAX_MADT_ENTRIES - 1] = 0xff };
96 EXPORT_SYMBOL(x86_acpiid_to_apicid);
98 /* --------------------------------------------------------------------------
99 Boot-time Configuration
100 -------------------------------------------------------------------------- */
103 * The default interrupt routing model is PIC (8259). This gets
104 * overriden 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 *__acpi_map_table(unsigned long phys_addr, unsigned long size)
113 if (!phys_addr || !size)
116 if (phys_addr+size <= (end_pfn_map << 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 *__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_table_mcfg_config *pci_mmcfg_config;
168 int pci_mmcfg_config_num;
170 int __init acpi_parse_mcfg(unsigned long phys_addr, unsigned long size)
172 struct acpi_table_mcfg *mcfg;
176 if (!phys_addr || !size)
179 mcfg = (struct acpi_table_mcfg *)__acpi_map_table(phys_addr, size);
181 printk(KERN_WARNING PREFIX "Unable to map MCFG\n");
185 /* how many config structures do we have */
186 pci_mmcfg_config_num = 0;
187 i = size - sizeof(struct acpi_table_mcfg);
188 while (i >= sizeof(struct acpi_table_mcfg_config)) {
189 ++pci_mmcfg_config_num;
190 i -= sizeof(struct acpi_table_mcfg_config);
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->config, config_size);
206 for (i = 0; i < pci_mmcfg_config_num; ++i) {
207 if (mcfg->config[i].base_reserved) {
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(unsigned long phys_addr, unsigned long size)
223 struct acpi_table_madt *madt = NULL;
225 if (!phys_addr || !size || !cpu_has_apic)
228 madt = (struct acpi_table_madt *)__acpi_map_table(phys_addr, size);
230 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
234 if (madt->lapic_address) {
235 acpi_lapic_addr = (u64) madt->lapic_address;
237 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
238 madt->lapic_address);
241 acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
247 acpi_parse_lapic(acpi_table_entry_header * header, const unsigned long end)
249 struct acpi_table_lapic *processor = NULL;
251 processor = (struct acpi_table_lapic *)header;
253 if (BAD_MADT_ENTRY(processor, end))
256 acpi_table_print_madt_entry(header);
258 /* Record local apic id only when enabled */
259 if (processor->flags.enabled)
260 x86_acpiid_to_apicid[processor->acpi_id] = processor->id;
263 * We need to register disabled CPU as well to permit
264 * counting disabled CPUs. This allows us to size
265 * cpus_possible_map more accurately, to permit
266 * to not preallocating memory for all NR_CPUS
267 * when we use CPU hotplug.
269 mp_register_lapic(processor->id, /* APIC ID */
270 processor->flags.enabled); /* Enabled? */
276 acpi_parse_lapic_addr_ovr(acpi_table_entry_header * header,
277 const unsigned long end)
279 struct acpi_table_lapic_addr_ovr *lapic_addr_ovr = NULL;
281 lapic_addr_ovr = (struct acpi_table_lapic_addr_ovr *)header;
283 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
286 acpi_lapic_addr = lapic_addr_ovr->address;
292 acpi_parse_lapic_nmi(acpi_table_entry_header * header, const unsigned long end)
294 struct acpi_table_lapic_nmi *lapic_nmi = NULL;
296 lapic_nmi = (struct acpi_table_lapic_nmi *)header;
298 if (BAD_MADT_ENTRY(lapic_nmi, end))
301 acpi_table_print_madt_entry(header);
303 if (lapic_nmi->lint != 1)
304 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
309 #endif /*CONFIG_X86_LOCAL_APIC */
311 #ifdef CONFIG_X86_IO_APIC
314 acpi_parse_ioapic(acpi_table_entry_header * header, const unsigned long end)
316 struct acpi_table_ioapic *ioapic = NULL;
318 ioapic = (struct acpi_table_ioapic *)header;
320 if (BAD_MADT_ENTRY(ioapic, end))
323 acpi_table_print_madt_entry(header);
325 mp_register_ioapic(ioapic->id,
326 ioapic->address, ioapic->global_irq_base);
332 * Parse Interrupt Source Override for the ACPI SCI
334 static void acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
336 if (trigger == 0) /* compatible SCI trigger is level */
339 if (polarity == 0) /* compatible SCI polarity is low */
342 /* Command-line over-ride via acpi_sci= */
343 if (acpi_sci_flags.trigger)
344 trigger = acpi_sci_flags.trigger;
346 if (acpi_sci_flags.polarity)
347 polarity = acpi_sci_flags.polarity;
350 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
351 * If GSI is < 16, this will update its flags,
352 * else it will create a new mp_irqs[] entry.
354 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
357 * stash over-ride to indicate we've been here
358 * and for later update of acpi_fadt
360 acpi_sci_override_gsi = gsi;
365 acpi_parse_int_src_ovr(acpi_table_entry_header * header,
366 const unsigned long end)
368 struct acpi_table_int_src_ovr *intsrc = NULL;
370 intsrc = (struct acpi_table_int_src_ovr *)header;
372 if (BAD_MADT_ENTRY(intsrc, end))
375 acpi_table_print_madt_entry(header);
377 if (intsrc->bus_irq == acpi_fadt.sci_int) {
378 acpi_sci_ioapic_setup(intsrc->global_irq,
379 intsrc->flags.polarity,
380 intsrc->flags.trigger);
384 if (acpi_skip_timer_override &&
385 intsrc->bus_irq == 0 && intsrc->global_irq == 2) {
386 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
390 mp_override_legacy_irq(intsrc->bus_irq,
391 intsrc->flags.polarity,
392 intsrc->flags.trigger, intsrc->global_irq);
398 acpi_parse_nmi_src(acpi_table_entry_header * header, const unsigned long end)
400 struct acpi_table_nmi_src *nmi_src = NULL;
402 nmi_src = (struct acpi_table_nmi_src *)header;
404 if (BAD_MADT_ENTRY(nmi_src, end))
407 acpi_table_print_madt_entry(header);
409 /* TBD: Support nimsrc entries? */
414 #endif /* CONFIG_X86_IO_APIC */
417 * acpi_pic_sci_set_trigger()
419 * use ELCR to set PIC-mode trigger type for SCI
421 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
422 * it may require Edge Trigger -- use "acpi_sci=edge"
424 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
425 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
426 * ECLR1 is IRQ's 0-7 (IRQ 0, 1, 2 must be 0)
427 * ECLR2 is IRQ's 8-15 (IRQ 8, 13 must be 0)
430 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
432 unsigned int mask = 1 << irq;
433 unsigned int old, new;
435 /* Real old ELCR mask */
436 old = inb(0x4d0) | (inb(0x4d1) << 8);
439 * If we use ACPI to set PCI irq's, then we should clear ELCR
440 * since we will set it correctly as we enable the PCI irq
443 new = acpi_noirq ? old : 0;
446 * Update SCI information in the ELCR, it isn't in the PCI
450 case 1: /* Edge - clear */
453 case 3: /* Level - set */
461 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
463 outb(new >> 8, 0x4d1);
466 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
468 #ifdef CONFIG_X86_IO_APIC
469 if (use_pci_vector() && !platform_legacy_irq(gsi))
470 *irq = IO_APIC_VECTOR(gsi);
473 *irq = gsi_irq_sharing(gsi);
478 * success: return IRQ number (>=0)
479 * failure: return < 0
481 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
484 unsigned int plat_gsi = gsi;
488 * Make sure all (legacy) PCI IRQs are set as level-triggered.
490 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
491 extern void eisa_set_level_irq(unsigned int irq);
493 if (triggering == ACPI_LEVEL_SENSITIVE)
494 eisa_set_level_irq(gsi);
498 #ifdef CONFIG_X86_IO_APIC
499 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
500 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
503 acpi_gsi_to_irq(plat_gsi, &irq);
507 EXPORT_SYMBOL(acpi_register_gsi);
510 * ACPI based hotplug support for CPU
512 #ifdef CONFIG_ACPI_HOTPLUG_CPU
513 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
519 EXPORT_SYMBOL(acpi_map_lsapic);
521 int acpi_unmap_lsapic(int cpu)
527 EXPORT_SYMBOL(acpi_unmap_lsapic);
528 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
530 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
536 EXPORT_SYMBOL(acpi_register_ioapic);
538 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
544 EXPORT_SYMBOL(acpi_unregister_ioapic);
546 static unsigned long __init
547 acpi_scan_rsdp(unsigned long start, unsigned long length)
549 unsigned long offset = 0;
550 unsigned long sig_len = sizeof("RSD PTR ") - 1;
553 * Scan all 16-byte boundaries of the physical memory region for the
556 for (offset = 0; offset < length; offset += 16) {
557 if (strncmp((char *)(phys_to_virt(start) + offset), "RSD PTR ", sig_len))
559 return (start + offset);
565 static int __init acpi_parse_sbf(unsigned long phys_addr, unsigned long size)
567 struct acpi_table_sbf *sb;
569 if (!phys_addr || !size)
572 sb = (struct acpi_table_sbf *)__acpi_map_table(phys_addr, size);
574 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
578 sbf_port = sb->sbf_cmos; /* Save CMOS port */
583 #ifdef CONFIG_HPET_TIMER
585 static int __init acpi_parse_hpet(unsigned long phys, unsigned long size)
587 struct acpi_table_hpet *hpet_tbl;
592 hpet_tbl = (struct acpi_table_hpet *)__acpi_map_table(phys, size);
594 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
598 if (hpet_tbl->addr.space_id != ACPI_SPACE_MEM) {
599 printk(KERN_WARNING PREFIX "HPET timers must be located in "
604 vxtime.hpet_address = hpet_tbl->addr.addrl |
605 ((long)hpet_tbl->addr.addrh << 32);
607 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
608 hpet_tbl->id, vxtime.hpet_address);
611 extern unsigned long hpet_address;
613 hpet_address = hpet_tbl->addr.addrl;
614 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
615 hpet_tbl->id, hpet_address);
622 #define acpi_parse_hpet NULL
625 #ifdef CONFIG_X86_PM_TIMER
626 extern u32 pmtmr_ioport;
629 static int __init acpi_parse_fadt(unsigned long phys, unsigned long size)
631 struct fadt_descriptor *fadt = NULL;
633 fadt = (struct fadt_descriptor *)__acpi_map_table(phys, size);
635 printk(KERN_WARNING PREFIX "Unable to map FADT\n");
638 /* initialize sci_int early for INT_SRC_OVR MADT parsing */
639 acpi_fadt.sci_int = fadt->sci_int;
641 /* initialize rev and apic_phys_dest_mode for x86_64 genapic */
642 acpi_fadt.revision = fadt->revision;
643 acpi_fadt.force_apic_physical_destination_mode =
644 fadt->force_apic_physical_destination_mode;
646 #ifdef CONFIG_X86_PM_TIMER
647 /* detect the location of the ACPI PM Timer */
648 if (fadt->revision >= FADT2_REVISION_ID) {
650 if (fadt->xpm_tmr_blk.address_space_id !=
651 ACPI_ADR_SPACE_SYSTEM_IO)
654 pmtmr_ioport = fadt->xpm_tmr_blk.address;
656 * "X" fields are optional extensions to the original V1.0
657 * fields, so we must selectively expand V1.0 fields if the
658 * corresponding X field is zero.
661 pmtmr_ioport = fadt->V1_pm_tmr_blk;
664 pmtmr_ioport = fadt->V1_pm_tmr_blk;
667 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
673 unsigned long __init acpi_find_rsdp(void)
675 unsigned long rsdp_phys = 0;
678 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
680 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
684 * Scan memory looking for the RSDP signature. First search EBDA (low
685 * memory) paragraphs and then search upper memory (E0000-FFFFF).
687 rsdp_phys = acpi_scan_rsdp(0, 0x400);
689 rsdp_phys = acpi_scan_rsdp(0xE0000, 0x20000);
694 #ifdef CONFIG_X86_LOCAL_APIC
696 * Parse LAPIC entries in MADT
697 * returns 0 on success, < 0 on error
699 static int __init acpi_parse_madt_lapic_entries(void)
707 * Note that the LAPIC address is obtained from the MADT (32-bit value)
708 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
712 acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR,
713 acpi_parse_lapic_addr_ovr, 0);
715 printk(KERN_ERR PREFIX
716 "Error parsing LAPIC address override entry\n");
720 mp_register_lapic_address(acpi_lapic_addr);
722 count = acpi_table_parse_madt(ACPI_MADT_LAPIC, acpi_parse_lapic,
725 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
726 /* TBD: Cleanup to allow fallback to MPS */
728 } else if (count < 0) {
729 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
730 /* TBD: Cleanup to allow fallback to MPS */
735 acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0);
737 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
738 /* TBD: Cleanup to allow fallback to MPS */
743 #endif /* CONFIG_X86_LOCAL_APIC */
745 #ifdef CONFIG_X86_IO_APIC
747 * Parse IOAPIC related entries in MADT
748 * returns 0 on success, < 0 on error
750 static int __init acpi_parse_madt_ioapic_entries(void)
755 * ACPI interpreter is required to complete interrupt setup,
756 * so if it is off, don't enumerate the io-apics with ACPI.
757 * If MPS is present, it will handle them,
758 * otherwise the system will stay in PIC mode
760 if (acpi_disabled || acpi_noirq) {
768 * if "noapic" boot option, don't look for IO-APICs
770 if (skip_ioapic_setup) {
771 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
772 "due to 'noapic' option.\n");
777 acpi_table_parse_madt(ACPI_MADT_IOAPIC, acpi_parse_ioapic,
780 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
782 } else if (count < 0) {
783 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
788 acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr,
791 printk(KERN_ERR PREFIX
792 "Error parsing interrupt source overrides entry\n");
793 /* TBD: Cleanup to allow fallback to MPS */
798 * If BIOS did not supply an INT_SRC_OVR for the SCI
799 * pretend we got one so we can set the SCI flags.
801 if (!acpi_sci_override_gsi)
802 acpi_sci_ioapic_setup(acpi_fadt.sci_int, 0, 0);
804 /* Fill in identity legacy mapings where no override */
805 mp_config_acpi_legacy_irqs();
808 acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src,
811 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
812 /* TBD: Cleanup to allow fallback to MPS */
819 static inline int acpi_parse_madt_ioapic_entries(void)
823 #endif /* !CONFIG_X86_IO_APIC */
825 static void __init acpi_process_madt(void)
827 #ifdef CONFIG_X86_LOCAL_APIC
830 count = acpi_table_parse(ACPI_APIC, acpi_parse_madt);
834 * Parse MADT LAPIC entries
836 error = acpi_parse_madt_lapic_entries();
840 #ifdef CONFIG_X86_GENERICARCH
841 generic_bigsmp_probe();
844 * Parse MADT IO-APIC entries
846 error = acpi_parse_madt_ioapic_entries();
848 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
849 acpi_irq_balance_set(NULL);
852 smp_found_config = 1;
853 clustered_apic_check();
856 if (error == -EINVAL) {
858 * Dell Precision Workstation 410, 610 come here.
860 printk(KERN_ERR PREFIX
861 "Invalid BIOS MADT, disabling ACPI\n");
871 static int __init disable_acpi_irq(struct dmi_system_id *d)
874 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
881 static int __init disable_acpi_pci(struct dmi_system_id *d)
884 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
891 static int __init dmi_disable_acpi(struct dmi_system_id *d)
894 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
898 "Warning: DMI blacklist says broken, but acpi forced\n");
904 * Limit ACPI to CPU enumeration for HT
906 static int __init force_acpi_ht(struct dmi_system_id *d)
909 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
915 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
921 * If your system is blacklisted here, but you find that acpi=force
922 * works for you, please contact acpi-devel@sourceforge.net
924 static struct dmi_system_id __initdata acpi_dmi_table[] = {
926 * Boxes that need ACPI disabled
929 .callback = dmi_disable_acpi,
930 .ident = "IBM Thinkpad",
932 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
933 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
938 * Boxes that need acpi=ht
941 .callback = force_acpi_ht,
942 .ident = "FSC Primergy T850",
944 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
945 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
949 .callback = force_acpi_ht,
950 .ident = "DELL GX240",
952 DMI_MATCH(DMI_BOARD_VENDOR, "Dell Computer Corporation"),
953 DMI_MATCH(DMI_BOARD_NAME, "OptiPlex GX240"),
957 .callback = force_acpi_ht,
958 .ident = "HP VISUALIZE NT Workstation",
960 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
961 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
965 .callback = force_acpi_ht,
966 .ident = "Compaq Workstation W8000",
968 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
969 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
973 .callback = force_acpi_ht,
974 .ident = "ASUS P4B266",
976 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
977 DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
981 .callback = force_acpi_ht,
982 .ident = "ASUS P2B-DS",
984 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
985 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
989 .callback = force_acpi_ht,
990 .ident = "ASUS CUR-DLS",
992 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
993 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
997 .callback = force_acpi_ht,
998 .ident = "ABIT i440BX-W83977",
1000 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1001 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1005 .callback = force_acpi_ht,
1006 .ident = "IBM Bladecenter",
1008 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1009 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1013 .callback = force_acpi_ht,
1014 .ident = "IBM eServer xSeries 360",
1016 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1017 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1021 .callback = force_acpi_ht,
1022 .ident = "IBM eserver xSeries 330",
1024 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1025 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1029 .callback = force_acpi_ht,
1030 .ident = "IBM eserver xSeries 440",
1032 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1033 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1038 * Boxes that need ACPI PCI IRQ routing disabled
1041 .callback = disable_acpi_irq,
1042 .ident = "ASUS A7V",
1044 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1045 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1046 /* newer BIOS, Revision 1011, does work */
1047 DMI_MATCH(DMI_BIOS_VERSION,
1048 "ASUS A7V ACPI BIOS Revision 1007"),
1053 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1056 .callback = disable_acpi_pci,
1057 .ident = "ASUS PR-DLS",
1059 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1060 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1061 DMI_MATCH(DMI_BIOS_VERSION,
1062 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1063 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1067 .callback = disable_acpi_pci,
1068 .ident = "Acer TravelMate 36x Laptop",
1070 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1071 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1077 #endif /* __i386__ */
1080 * acpi_boot_table_init() and acpi_boot_init()
1081 * called from setup_arch(), always.
1082 * 1. checksums all tables
1083 * 2. enumerates lapics
1084 * 3. enumerates io-apics
1086 * acpi_table_init() is separate to allow reading SRAT without
1087 * other side effects.
1089 * side effects of acpi_boot_init:
1090 * acpi_lapic = 1 if LAPIC found
1091 * acpi_ioapic = 1 if IOAPIC found
1092 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1093 * if acpi_blacklisted() acpi_disabled = 1;
1094 * acpi_irq_model=...
1097 * return value: (currently ignored)
1102 int __init acpi_boot_table_init(void)
1107 dmi_check_system(acpi_dmi_table);
1111 * If acpi_disabled, bail out
1112 * One exception: acpi=ht continues far enough to enumerate LAPICs
1114 if (acpi_disabled && !acpi_ht)
1118 * Initialize the ACPI boot-time table parser.
1120 error = acpi_table_init();
1126 acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
1129 * blacklist may disable ACPI entirely
1131 error = acpi_blacklisted();
1134 printk(KERN_WARNING PREFIX "acpi=force override\n");
1136 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1145 int __init acpi_boot_init(void)
1148 * If acpi_disabled, bail out
1149 * One exception: acpi=ht continues far enough to enumerate LAPICs
1151 if (acpi_disabled && !acpi_ht)
1154 acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
1157 * set sci_int and PM timer address
1159 acpi_table_parse(ACPI_FADT, acpi_parse_fadt);
1162 * Process the Multiple APIC Description Table (MADT), if present
1164 acpi_process_madt();
1166 acpi_table_parse(ACPI_HPET, acpi_parse_hpet);
1171 static int __init parse_acpi(char *arg)
1176 /* "acpi=off" disables both ACPI table parsing and interpreter */
1177 if (strcmp(arg, "off") == 0) {
1180 /* acpi=force to over-ride black-list */
1181 else if (strcmp(arg, "force") == 0) {
1186 /* acpi=strict disables out-of-spec workarounds */
1187 else if (strcmp(arg, "strict") == 0) {
1190 /* Limit ACPI just to boot-time to enable HT */
1191 else if (strcmp(arg, "ht") == 0) {
1196 /* "acpi=noirq" disables ACPI interrupt routing */
1197 else if (strcmp(arg, "noirq") == 0) {
1200 /* Core will printk when we return error. */
1205 early_param("acpi", parse_acpi);
1207 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1208 static int __init parse_pci(char *arg)
1210 if (arg && strcmp(arg, "noacpi") == 0)
1214 early_param("pci", parse_pci);
1216 #ifdef CONFIG_X86_IO_APIC
1217 static int __init parse_acpi_skip_timer_override(char *arg)
1219 acpi_skip_timer_override = 1;
1222 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1223 #endif /* CONFIG_X86_IO_APIC */
1225 static int __init setup_acpi_sci(char *s)
1229 if (!strcmp(s, "edge"))
1230 acpi_sci_flags.trigger = 1;
1231 else if (!strcmp(s, "level"))
1232 acpi_sci_flags.trigger = 3;
1233 else if (!strcmp(s, "high"))
1234 acpi_sci_flags.polarity = 1;
1235 else if (!strcmp(s, "low"))
1236 acpi_sci_flags.polarity = 3;
1241 early_param("acpi_sci", setup_acpi_sci);