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_table_mcfg_config
*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 printk(KERN_WARNING PREFIX
"Unable to map MCFG\n");
187 /* how many config structures do we have */
188 pci_mmcfg_config_num
= 0;
189 i
= header
->length
- sizeof(struct acpi_table_mcfg
);
190 while (i
>= sizeof(struct acpi_table_mcfg_config
)) {
191 ++pci_mmcfg_config_num
;
192 i
-= sizeof(struct acpi_table_mcfg_config
);
194 if (pci_mmcfg_config_num
== 0) {
195 printk(KERN_ERR PREFIX
"MMCONFIG has no entries\n");
199 config_size
= pci_mmcfg_config_num
* sizeof(*pci_mmcfg_config
);
200 pci_mmcfg_config
= kmalloc(config_size
, GFP_KERNEL
);
201 if (!pci_mmcfg_config
) {
202 printk(KERN_WARNING PREFIX
203 "No memory for MCFG config tables\n");
207 memcpy(pci_mmcfg_config
, &mcfg
[1], config_size
);
208 for (i
= 0; i
< pci_mmcfg_config_num
; ++i
) {
209 if (pci_mmcfg_config
[i
].base_reserved
) {
210 printk(KERN_ERR PREFIX
211 "MMCONFIG not in low 4GB of memory\n");
212 kfree(pci_mmcfg_config
);
213 pci_mmcfg_config_num
= 0;
220 #endif /* CONFIG_PCI_MMCONFIG */
222 #ifdef CONFIG_X86_LOCAL_APIC
223 static int __init
acpi_parse_madt(struct acpi_table_header
*header
)
225 struct acpi_table_madt
*madt
= NULL
;
227 if (!header
|| !cpu_has_apic
)
230 madt
= (struct acpi_table_madt
*)header
;
232 printk(KERN_WARNING PREFIX
"Unable to map MADT\n");
237 acpi_lapic_addr
= (u64
) madt
->address
;
239 printk(KERN_DEBUG PREFIX
"Local APIC address 0x%08x\n",
243 acpi_madt_oem_check(madt
->header
.oem_id
, madt
->header
.oem_table_id
);
249 acpi_parse_lapic(struct acpi_subtable_header
* header
, const unsigned long end
)
251 struct acpi_madt_local_apic
*processor
= NULL
;
253 processor
= (struct acpi_madt_local_apic
*)header
;
255 if (BAD_MADT_ENTRY(processor
, end
))
258 acpi_table_print_madt_entry(header
);
260 /* Record local apic id only when enabled */
261 if (processor
->lapic_flags
& ACPI_MADT_ENABLED
)
262 x86_acpiid_to_apicid
[processor
->processor_id
] = processor
->id
;
265 * We need to register disabled CPU as well to permit
266 * counting disabled CPUs. This allows us to size
267 * cpus_possible_map more accurately, to permit
268 * to not preallocating memory for all NR_CPUS
269 * when we use CPU hotplug.
271 mp_register_lapic(processor
->id
, /* APIC ID */
272 processor
->lapic_flags
& ACPI_MADT_ENABLED
); /* Enabled? */
278 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header
* header
,
279 const unsigned long end
)
281 struct acpi_madt_local_apic_override
*lapic_addr_ovr
= NULL
;
283 lapic_addr_ovr
= (struct acpi_madt_local_apic_override
*)header
;
285 if (BAD_MADT_ENTRY(lapic_addr_ovr
, end
))
288 acpi_lapic_addr
= lapic_addr_ovr
->address
;
294 acpi_parse_lapic_nmi(struct acpi_subtable_header
* header
, const unsigned long end
)
296 struct acpi_madt_local_apic_nmi
*lapic_nmi
= NULL
;
298 lapic_nmi
= (struct acpi_madt_local_apic_nmi
*)header
;
300 if (BAD_MADT_ENTRY(lapic_nmi
, end
))
303 acpi_table_print_madt_entry(header
);
305 if (lapic_nmi
->lint
!= 1)
306 printk(KERN_WARNING PREFIX
"NMI not connected to LINT 1!\n");
311 #endif /*CONFIG_X86_LOCAL_APIC */
313 #ifdef CONFIG_X86_IO_APIC
316 acpi_parse_ioapic(struct acpi_subtable_header
* header
, const unsigned long end
)
318 struct acpi_madt_io_apic
*ioapic
= NULL
;
320 ioapic
= (struct acpi_madt_io_apic
*)header
;
322 if (BAD_MADT_ENTRY(ioapic
, end
))
325 acpi_table_print_madt_entry(header
);
327 mp_register_ioapic(ioapic
->id
,
328 ioapic
->address
, ioapic
->global_irq_base
);
334 * Parse Interrupt Source Override for the ACPI SCI
336 static void __init
acpi_sci_ioapic_setup(u32 gsi
, u16 polarity
, u16 trigger
)
338 if (trigger
== 0) /* compatible SCI trigger is level */
341 if (polarity
== 0) /* compatible SCI polarity is low */
344 /* Command-line over-ride via acpi_sci= */
345 if (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
)
346 trigger
= (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2;
348 if (acpi_sci_flags
& ACPI_MADT_POLARITY_MASK
)
349 polarity
= acpi_sci_flags
& ACPI_MADT_POLARITY_MASK
;
352 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
353 * If GSI is < 16, this will update its flags,
354 * else it will create a new mp_irqs[] entry.
356 mp_override_legacy_irq(gsi
, polarity
, trigger
, gsi
);
359 * stash over-ride to indicate we've been here
360 * and for later update of acpi_gbl_FADT
362 acpi_sci_override_gsi
= gsi
;
367 acpi_parse_int_src_ovr(struct acpi_subtable_header
* header
,
368 const unsigned long end
)
370 struct acpi_madt_interrupt_override
*intsrc
= NULL
;
372 intsrc
= (struct acpi_madt_interrupt_override
*)header
;
374 if (BAD_MADT_ENTRY(intsrc
, end
))
377 acpi_table_print_madt_entry(header
);
379 if (intsrc
->source_irq
== acpi_gbl_FADT
.sci_interrupt
) {
380 acpi_sci_ioapic_setup(intsrc
->global_irq
,
381 intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
,
382 (intsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2);
386 if (acpi_skip_timer_override
&&
387 intsrc
->source_irq
== 0 && intsrc
->global_irq
== 2) {
388 printk(PREFIX
"BIOS IRQ0 pin2 override ignored.\n");
392 mp_override_legacy_irq(intsrc
->source_irq
,
393 intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
,
394 (intsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2,
401 acpi_parse_nmi_src(struct acpi_subtable_header
* header
, const unsigned long end
)
403 struct acpi_madt_nmi_source
*nmi_src
= NULL
;
405 nmi_src
= (struct acpi_madt_nmi_source
*)header
;
407 if (BAD_MADT_ENTRY(nmi_src
, end
))
410 acpi_table_print_madt_entry(header
);
412 /* TBD: Support nimsrc entries? */
417 #endif /* CONFIG_X86_IO_APIC */
420 * acpi_pic_sci_set_trigger()
422 * use ELCR to set PIC-mode trigger type for SCI
424 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
425 * it may require Edge Trigger -- use "acpi_sci=edge"
427 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
428 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
429 * ECLR1 is IRQ's 0-7 (IRQ 0, 1, 2 must be 0)
430 * ECLR2 is IRQ's 8-15 (IRQ 8, 13 must be 0)
433 void __init
acpi_pic_sci_set_trigger(unsigned int irq
, u16 trigger
)
435 unsigned int mask
= 1 << irq
;
436 unsigned int old
, new;
438 /* Real old ELCR mask */
439 old
= inb(0x4d0) | (inb(0x4d1) << 8);
442 * If we use ACPI to set PCI irq's, then we should clear ELCR
443 * since we will set it correctly as we enable the PCI irq
446 new = acpi_noirq
? old
: 0;
449 * Update SCI information in the ELCR, it isn't in the PCI
453 case 1: /* Edge - clear */
456 case 3: /* Level - set */
464 printk(PREFIX
"setting ELCR to %04x (from %04x)\n", new, old
);
466 outb(new >> 8, 0x4d1);
469 int acpi_gsi_to_irq(u32 gsi
, unsigned int *irq
)
476 * success: return IRQ number (>=0)
477 * failure: return < 0
479 int acpi_register_gsi(u32 gsi
, int triggering
, int polarity
)
482 unsigned int plat_gsi
= gsi
;
486 * Make sure all (legacy) PCI IRQs are set as level-triggered.
488 if (acpi_irq_model
== ACPI_IRQ_MODEL_PIC
) {
489 extern void eisa_set_level_irq(unsigned int irq
);
491 if (triggering
== ACPI_LEVEL_SENSITIVE
)
492 eisa_set_level_irq(gsi
);
496 #ifdef CONFIG_X86_IO_APIC
497 if (acpi_irq_model
== ACPI_IRQ_MODEL_IOAPIC
) {
498 plat_gsi
= mp_register_gsi(gsi
, triggering
, polarity
);
501 acpi_gsi_to_irq(plat_gsi
, &irq
);
505 EXPORT_SYMBOL(acpi_register_gsi
);
508 * ACPI based hotplug support for CPU
510 #ifdef CONFIG_ACPI_HOTPLUG_CPU
511 int acpi_map_lsapic(acpi_handle handle
, int *pcpu
)
513 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
514 union acpi_object
*obj
;
515 struct acpi_madt_local_apic
*lapic
;
516 cpumask_t tmp_map
, new_map
;
520 if (ACPI_FAILURE(acpi_evaluate_object(handle
, "_MAT", NULL
, &buffer
)))
523 if (!buffer
.length
|| !buffer
.pointer
)
526 obj
= buffer
.pointer
;
527 if (obj
->type
!= ACPI_TYPE_BUFFER
||
528 obj
->buffer
.length
< sizeof(*lapic
)) {
529 kfree(buffer
.pointer
);
533 lapic
= (struct acpi_madt_local_apic
*)obj
->buffer
.pointer
;
535 if (lapic
->header
.type
!= ACPI_MADT_TYPE_LOCAL_APIC
||
536 !(lapic
->lapic_flags
& ACPI_MADT_ENABLED
)) {
537 kfree(buffer
.pointer
);
543 kfree(buffer
.pointer
);
544 buffer
.length
= ACPI_ALLOCATE_BUFFER
;
545 buffer
.pointer
= NULL
;
547 tmp_map
= cpu_present_map
;
548 mp_register_lapic(physid
, lapic
->lapic_flags
& ACPI_MADT_ENABLED
);
551 * If mp_register_lapic successfully generates a new logical cpu
552 * number, then the following will get us exactly what was mapped
554 cpus_andnot(new_map
, cpu_present_map
, tmp_map
);
555 if (cpus_empty(new_map
)) {
556 printk ("Unable to map lapic to logical cpu number\n");
560 cpu
= first_cpu(new_map
);
566 EXPORT_SYMBOL(acpi_map_lsapic
);
568 int acpi_unmap_lsapic(int cpu
)
572 for_each_possible_cpu(i
) {
573 if (x86_acpiid_to_apicid
[i
] == x86_cpu_to_apicid
[cpu
]) {
574 x86_acpiid_to_apicid
[i
] = -1;
578 x86_cpu_to_apicid
[cpu
] = -1;
579 cpu_clear(cpu
, cpu_present_map
);
585 EXPORT_SYMBOL(acpi_unmap_lsapic
);
586 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
588 int acpi_register_ioapic(acpi_handle handle
, u64 phys_addr
, u32 gsi_base
)
594 EXPORT_SYMBOL(acpi_register_ioapic
);
596 int acpi_unregister_ioapic(acpi_handle handle
, u32 gsi_base
)
602 EXPORT_SYMBOL(acpi_unregister_ioapic
);
604 static unsigned long __init
605 acpi_scan_rsdp(unsigned long start
, unsigned long length
)
607 unsigned long offset
= 0;
608 unsigned long sig_len
= sizeof("RSD PTR ") - 1;
611 * Scan all 16-byte boundaries of the physical memory region for the
614 for (offset
= 0; offset
< length
; offset
+= 16) {
615 if (strncmp((char *)(phys_to_virt(start
) + offset
), "RSD PTR ", sig_len
))
617 return (start
+ offset
);
623 static int __init
acpi_parse_sbf(struct acpi_table_header
*table
)
625 struct acpi_table_boot
*sb
;
627 sb
= (struct acpi_table_boot
*)table
;
629 printk(KERN_WARNING PREFIX
"Unable to map SBF\n");
633 sbf_port
= sb
->cmos_index
; /* Save CMOS port */
638 #ifdef CONFIG_HPET_TIMER
640 static int __init
acpi_parse_hpet(struct acpi_table_header
*table
)
642 struct acpi_table_hpet
*hpet_tbl
;
643 struct resource
*hpet_res
;
644 resource_size_t res_start
;
646 hpet_tbl
= (struct acpi_table_hpet
*)table
;
648 printk(KERN_WARNING PREFIX
"Unable to map HPET\n");
652 if (hpet_tbl
->address
.space_id
!= ACPI_SPACE_MEM
) {
653 printk(KERN_WARNING PREFIX
"HPET timers must be located in "
658 #define HPET_RESOURCE_NAME_SIZE 9
659 hpet_res
= alloc_bootmem(sizeof(*hpet_res
) + HPET_RESOURCE_NAME_SIZE
);
661 memset(hpet_res
, 0, sizeof(*hpet_res
));
662 hpet_res
->name
= (void *)&hpet_res
[1];
663 hpet_res
->flags
= IORESOURCE_MEM
| IORESOURCE_BUSY
;
664 snprintf((char *)hpet_res
->name
, HPET_RESOURCE_NAME_SIZE
,
665 "HPET %u", hpet_tbl
->sequence
);
666 hpet_res
->end
= (1 * 1024) - 1;
670 vxtime
.hpet_address
= hpet_tbl
->address
.address
;
672 printk(KERN_INFO PREFIX
"HPET id: %#x base: %#lx\n",
673 hpet_tbl
->id
, vxtime
.hpet_address
);
675 res_start
= vxtime
.hpet_address
;
678 extern unsigned long hpet_address
;
680 hpet_address
= hpet_tbl
->address
.address
;
681 printk(KERN_INFO PREFIX
"HPET id: %#x base: %#lx\n",
682 hpet_tbl
->id
, hpet_address
);
684 res_start
= hpet_address
;
689 hpet_res
->start
= res_start
;
690 hpet_res
->end
+= res_start
;
691 insert_resource(&iomem_resource
, hpet_res
);
697 #define acpi_parse_hpet NULL
700 #ifdef CONFIG_X86_PM_TIMER
701 extern u32 pmtmr_ioport
;
704 static int __init
acpi_parse_fadt(struct acpi_table_header
*table
)
707 #ifdef CONFIG_X86_PM_TIMER
708 /* detect the location of the ACPI PM Timer */
709 if (acpi_gbl_FADT
.header
.revision
>= FADT2_REVISION_ID
) {
711 if (acpi_gbl_FADT
.xpm_timer_block
.space_id
!=
712 ACPI_ADR_SPACE_SYSTEM_IO
)
715 pmtmr_ioport
= acpi_gbl_FADT
.xpm_timer_block
.address
;
717 * "X" fields are optional extensions to the original V1.0
718 * fields, so we must selectively expand V1.0 fields if the
719 * corresponding X field is zero.
722 pmtmr_ioport
= acpi_gbl_FADT
.pm_timer_block
;
725 pmtmr_ioport
= acpi_gbl_FADT
.pm_timer_block
;
728 printk(KERN_INFO PREFIX
"PM-Timer IO Port: %#x\n",
734 unsigned long __init
acpi_find_rsdp(void)
736 unsigned long rsdp_phys
= 0;
739 if (efi
.acpi20
!= EFI_INVALID_TABLE_ADDR
)
741 else if (efi
.acpi
!= EFI_INVALID_TABLE_ADDR
)
745 * Scan memory looking for the RSDP signature. First search EBDA (low
746 * memory) paragraphs and then search upper memory (E0000-FFFFF).
748 rsdp_phys
= acpi_scan_rsdp(0, 0x400);
750 rsdp_phys
= acpi_scan_rsdp(0xE0000, 0x20000);
755 #ifdef CONFIG_X86_LOCAL_APIC
757 * Parse LAPIC entries in MADT
758 * returns 0 on success, < 0 on error
760 static int __init
acpi_parse_madt_lapic_entries(void)
768 * Note that the LAPIC address is obtained from the MADT (32-bit value)
769 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
773 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE
,
774 acpi_parse_lapic_addr_ovr
, 0);
776 printk(KERN_ERR PREFIX
777 "Error parsing LAPIC address override entry\n");
781 mp_register_lapic_address(acpi_lapic_addr
);
783 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC
, acpi_parse_lapic
,
786 printk(KERN_ERR PREFIX
"No LAPIC entries present\n");
787 /* TBD: Cleanup to allow fallback to MPS */
789 } else if (count
< 0) {
790 printk(KERN_ERR PREFIX
"Error parsing LAPIC entry\n");
791 /* TBD: Cleanup to allow fallback to MPS */
796 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI
, acpi_parse_lapic_nmi
, 0);
798 printk(KERN_ERR PREFIX
"Error parsing LAPIC NMI entry\n");
799 /* TBD: Cleanup to allow fallback to MPS */
804 #endif /* CONFIG_X86_LOCAL_APIC */
806 #ifdef CONFIG_X86_IO_APIC
808 * Parse IOAPIC related entries in MADT
809 * returns 0 on success, < 0 on error
811 static int __init
acpi_parse_madt_ioapic_entries(void)
816 * ACPI interpreter is required to complete interrupt setup,
817 * so if it is off, don't enumerate the io-apics with ACPI.
818 * If MPS is present, it will handle them,
819 * otherwise the system will stay in PIC mode
821 if (acpi_disabled
|| acpi_noirq
) {
829 * if "noapic" boot option, don't look for IO-APICs
831 if (skip_ioapic_setup
) {
832 printk(KERN_INFO PREFIX
"Skipping IOAPIC probe "
833 "due to 'noapic' option.\n");
838 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC
, acpi_parse_ioapic
,
841 printk(KERN_ERR PREFIX
"No IOAPIC entries present\n");
843 } else if (count
< 0) {
844 printk(KERN_ERR PREFIX
"Error parsing IOAPIC entry\n");
849 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE
, acpi_parse_int_src_ovr
,
852 printk(KERN_ERR PREFIX
853 "Error parsing interrupt source overrides entry\n");
854 /* TBD: Cleanup to allow fallback to MPS */
859 * If BIOS did not supply an INT_SRC_OVR for the SCI
860 * pretend we got one so we can set the SCI flags.
862 if (!acpi_sci_override_gsi
)
863 acpi_sci_ioapic_setup(acpi_gbl_FADT
.sci_interrupt
, 0, 0);
865 /* Fill in identity legacy mapings where no override */
866 mp_config_acpi_legacy_irqs();
869 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE
, acpi_parse_nmi_src
,
872 printk(KERN_ERR PREFIX
"Error parsing NMI SRC entry\n");
873 /* TBD: Cleanup to allow fallback to MPS */
880 static inline int acpi_parse_madt_ioapic_entries(void)
884 #endif /* !CONFIG_X86_IO_APIC */
886 static void __init
acpi_process_madt(void)
888 #ifdef CONFIG_X86_LOCAL_APIC
891 count
= acpi_table_parse(ACPI_SIG_MADT
, acpi_parse_madt
);
895 * Parse MADT LAPIC entries
897 error
= acpi_parse_madt_lapic_entries();
901 #ifdef CONFIG_X86_GENERICARCH
902 generic_bigsmp_probe();
905 * Parse MADT IO-APIC entries
907 error
= acpi_parse_madt_ioapic_entries();
909 acpi_irq_model
= ACPI_IRQ_MODEL_IOAPIC
;
910 acpi_irq_balance_set(NULL
);
913 smp_found_config
= 1;
914 clustered_apic_check();
917 if (error
== -EINVAL
) {
919 * Dell Precision Workstation 410, 610 come here.
921 printk(KERN_ERR PREFIX
922 "Invalid BIOS MADT, disabling ACPI\n");
932 static int __init
disable_acpi_irq(struct dmi_system_id
*d
)
935 printk(KERN_NOTICE
"%s detected: force use of acpi=noirq\n",
942 static int __init
disable_acpi_pci(struct dmi_system_id
*d
)
945 printk(KERN_NOTICE
"%s detected: force use of pci=noacpi\n",
952 static int __init
dmi_disable_acpi(struct dmi_system_id
*d
)
955 printk(KERN_NOTICE
"%s detected: acpi off\n", d
->ident
);
959 "Warning: DMI blacklist says broken, but acpi forced\n");
965 * Limit ACPI to CPU enumeration for HT
967 static int __init
force_acpi_ht(struct dmi_system_id
*d
)
970 printk(KERN_NOTICE
"%s detected: force use of acpi=ht\n",
976 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
982 * If your system is blacklisted here, but you find that acpi=force
983 * works for you, please contact acpi-devel@sourceforge.net
985 static struct dmi_system_id __initdata acpi_dmi_table
[] = {
987 * Boxes that need ACPI disabled
990 .callback
= dmi_disable_acpi
,
991 .ident
= "IBM Thinkpad",
993 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
994 DMI_MATCH(DMI_BOARD_NAME
, "2629H1G"),
999 * Boxes that need acpi=ht
1002 .callback
= force_acpi_ht
,
1003 .ident
= "FSC Primergy T850",
1005 DMI_MATCH(DMI_SYS_VENDOR
, "FUJITSU SIEMENS"),
1006 DMI_MATCH(DMI_PRODUCT_NAME
, "PRIMERGY T850"),
1010 .callback
= force_acpi_ht
,
1011 .ident
= "DELL GX240",
1013 DMI_MATCH(DMI_BOARD_VENDOR
, "Dell Computer Corporation"),
1014 DMI_MATCH(DMI_BOARD_NAME
, "OptiPlex GX240"),
1018 .callback
= force_acpi_ht
,
1019 .ident
= "HP VISUALIZE NT Workstation",
1021 DMI_MATCH(DMI_BOARD_VENDOR
, "Hewlett-Packard"),
1022 DMI_MATCH(DMI_PRODUCT_NAME
, "HP VISUALIZE NT Workstation"),
1026 .callback
= force_acpi_ht
,
1027 .ident
= "Compaq Workstation W8000",
1029 DMI_MATCH(DMI_SYS_VENDOR
, "Compaq"),
1030 DMI_MATCH(DMI_PRODUCT_NAME
, "Workstation W8000"),
1034 .callback
= force_acpi_ht
,
1035 .ident
= "ASUS P4B266",
1037 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1038 DMI_MATCH(DMI_BOARD_NAME
, "P4B266"),
1042 .callback
= force_acpi_ht
,
1043 .ident
= "ASUS P2B-DS",
1045 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1046 DMI_MATCH(DMI_BOARD_NAME
, "P2B-DS"),
1050 .callback
= force_acpi_ht
,
1051 .ident
= "ASUS CUR-DLS",
1053 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1054 DMI_MATCH(DMI_BOARD_NAME
, "CUR-DLS"),
1058 .callback
= force_acpi_ht
,
1059 .ident
= "ABIT i440BX-W83977",
1061 DMI_MATCH(DMI_BOARD_VENDOR
, "ABIT <http://www.abit.com>"),
1062 DMI_MATCH(DMI_BOARD_NAME
, "i440BX-W83977 (BP6)"),
1066 .callback
= force_acpi_ht
,
1067 .ident
= "IBM Bladecenter",
1069 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1070 DMI_MATCH(DMI_BOARD_NAME
, "IBM eServer BladeCenter HS20"),
1074 .callback
= force_acpi_ht
,
1075 .ident
= "IBM eServer xSeries 360",
1077 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1078 DMI_MATCH(DMI_BOARD_NAME
, "eServer xSeries 360"),
1082 .callback
= force_acpi_ht
,
1083 .ident
= "IBM eserver xSeries 330",
1085 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1086 DMI_MATCH(DMI_BOARD_NAME
, "eserver xSeries 330"),
1090 .callback
= force_acpi_ht
,
1091 .ident
= "IBM eserver xSeries 440",
1093 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1094 DMI_MATCH(DMI_PRODUCT_NAME
, "eserver xSeries 440"),
1099 * Boxes that need ACPI PCI IRQ routing disabled
1102 .callback
= disable_acpi_irq
,
1103 .ident
= "ASUS A7V",
1105 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC"),
1106 DMI_MATCH(DMI_BOARD_NAME
, "<A7V>"),
1107 /* newer BIOS, Revision 1011, does work */
1108 DMI_MATCH(DMI_BIOS_VERSION
,
1109 "ASUS A7V ACPI BIOS Revision 1007"),
1114 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1117 .callback
= disable_acpi_pci
,
1118 .ident
= "ASUS PR-DLS",
1120 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1121 DMI_MATCH(DMI_BOARD_NAME
, "PR-DLS"),
1122 DMI_MATCH(DMI_BIOS_VERSION
,
1123 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1124 DMI_MATCH(DMI_BIOS_DATE
, "03/21/2003")
1128 .callback
= disable_acpi_pci
,
1129 .ident
= "Acer TravelMate 36x Laptop",
1131 DMI_MATCH(DMI_SYS_VENDOR
, "Acer"),
1132 DMI_MATCH(DMI_PRODUCT_NAME
, "TravelMate 360"),
1138 #endif /* __i386__ */
1141 * acpi_boot_table_init() and acpi_boot_init()
1142 * called from setup_arch(), always.
1143 * 1. checksums all tables
1144 * 2. enumerates lapics
1145 * 3. enumerates io-apics
1147 * acpi_table_init() is separate to allow reading SRAT without
1148 * other side effects.
1150 * side effects of acpi_boot_init:
1151 * acpi_lapic = 1 if LAPIC found
1152 * acpi_ioapic = 1 if IOAPIC found
1153 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1154 * if acpi_blacklisted() acpi_disabled = 1;
1155 * acpi_irq_model=...
1158 * return value: (currently ignored)
1163 int __init
acpi_boot_table_init(void)
1168 dmi_check_system(acpi_dmi_table
);
1172 * If acpi_disabled, bail out
1173 * One exception: acpi=ht continues far enough to enumerate LAPICs
1175 if (acpi_disabled
&& !acpi_ht
)
1179 * Initialize the ACPI boot-time table parser.
1181 error
= acpi_table_init();
1187 acpi_table_parse(ACPI_SIG_BOOT
, acpi_parse_sbf
);
1190 * blacklist may disable ACPI entirely
1192 error
= acpi_blacklisted();
1195 printk(KERN_WARNING PREFIX
"acpi=force override\n");
1197 printk(KERN_WARNING PREFIX
"Disabling ACPI support\n");
1206 int __init
acpi_boot_init(void)
1209 * If acpi_disabled, bail out
1210 * One exception: acpi=ht continues far enough to enumerate LAPICs
1212 if (acpi_disabled
&& !acpi_ht
)
1215 acpi_table_parse(ACPI_SIG_BOOT
, acpi_parse_sbf
);
1218 * set sci_int and PM timer address
1220 acpi_table_parse(ACPI_SIG_FADT
, acpi_parse_fadt
);
1223 * Process the Multiple APIC Description Table (MADT), if present
1225 acpi_process_madt();
1227 acpi_table_parse(ACPI_SIG_HPET
, acpi_parse_hpet
);
1232 static int __init
parse_acpi(char *arg
)
1237 /* "acpi=off" disables both ACPI table parsing and interpreter */
1238 if (strcmp(arg
, "off") == 0) {
1241 /* acpi=force to over-ride black-list */
1242 else if (strcmp(arg
, "force") == 0) {
1247 /* acpi=strict disables out-of-spec workarounds */
1248 else if (strcmp(arg
, "strict") == 0) {
1251 /* Limit ACPI just to boot-time to enable HT */
1252 else if (strcmp(arg
, "ht") == 0) {
1257 /* "acpi=noirq" disables ACPI interrupt routing */
1258 else if (strcmp(arg
, "noirq") == 0) {
1261 /* Core will printk when we return error. */
1266 early_param("acpi", parse_acpi
);
1268 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1269 static int __init
parse_pci(char *arg
)
1271 if (arg
&& strcmp(arg
, "noacpi") == 0)
1275 early_param("pci", parse_pci
);
1277 #ifdef CONFIG_X86_IO_APIC
1278 static int __init
parse_acpi_skip_timer_override(char *arg
)
1280 acpi_skip_timer_override
= 1;
1283 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override
);
1285 static int __init
parse_acpi_use_timer_override(char *arg
)
1287 acpi_use_timer_override
= 1;
1290 early_param("acpi_use_timer_override", parse_acpi_use_timer_override
);
1291 #endif /* CONFIG_X86_IO_APIC */
1293 static int __init
setup_acpi_sci(char *s
)
1297 if (!strcmp(s
, "edge"))
1298 acpi_sci_flags
= ACPI_MADT_TRIGGER_EDGE
|
1299 (acpi_sci_flags
& ~ACPI_MADT_TRIGGER_MASK
);
1300 else if (!strcmp(s
, "level"))
1301 acpi_sci_flags
= ACPI_MADT_TRIGGER_LEVEL
|
1302 (acpi_sci_flags
& ~ACPI_MADT_TRIGGER_MASK
);
1303 else if (!strcmp(s
, "high"))
1304 acpi_sci_flags
= ACPI_MADT_POLARITY_ACTIVE_HIGH
|
1305 (acpi_sci_flags
& ~ACPI_MADT_POLARITY_MASK
);
1306 else if (!strcmp(s
, "low"))
1307 acpi_sci_flags
= ACPI_MADT_POLARITY_ACTIVE_LOW
|
1308 (acpi_sci_flags
& ~ACPI_MADT_POLARITY_MASK
);
1313 early_param("acpi_sci", setup_acpi_sci
);
1315 int __acpi_acquire_global_lock(unsigned int *lock
)
1317 unsigned int old
, new, val
;
1320 new = (((old
& ~0x3) + 2) + ((old
>> 1) & 0x1));
1321 val
= cmpxchg(lock
, old
, new);
1322 } while (unlikely (val
!= old
));
1323 return (new < 3) ? -1 : 0;
1326 int __acpi_release_global_lock(unsigned int *lock
)
1328 unsigned int old
, new, val
;
1332 val
= cmpxchg(lock
, old
, new);
1333 } while (unlikely (val
!= old
));