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
);