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 static int __initdata acpi_force
= 0;
46 int acpi_disabled
= 0;
48 int acpi_disabled
= 1;
50 EXPORT_SYMBOL(acpi_disabled
);
54 #include <asm/proto.h>
56 static inline int acpi_madt_oem_check(char *oem_id
, char *oem_table_id
) { return 0; }
61 #ifdef CONFIG_X86_LOCAL_APIC
62 #include <mach_apic.h>
63 #include <mach_mpparse.h>
64 #endif /* CONFIG_X86_LOCAL_APIC */
68 #define BAD_MADT_ENTRY(entry, end) ( \
69 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
70 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
72 #define PREFIX "ACPI: "
74 int acpi_noirq
; /* skip ACPI IRQ initialization */
75 int acpi_pci_disabled __initdata
; /* skip ACPI PCI scan and IRQ initialization */
76 int acpi_ht __initdata
= 1; /* enable HT */
81 EXPORT_SYMBOL(acpi_strict
);
83 u8 acpi_sci_flags __initdata
;
84 int acpi_sci_override_gsi __initdata
;
85 int acpi_skip_timer_override __initdata
;
86 int acpi_use_timer_override __initdata
;
88 #ifdef CONFIG_X86_LOCAL_APIC
89 static u64 acpi_lapic_addr __initdata
= APIC_DEFAULT_PHYS_BASE
;
92 #ifndef __HAVE_ARCH_CMPXCHG
93 #warning ACPI uses CMPXCHG, i486 and later hardware
96 /* --------------------------------------------------------------------------
97 Boot-time Configuration
98 -------------------------------------------------------------------------- */
101 * The default interrupt routing model is PIC (8259). This gets
102 * overridden if IOAPICs are enumerated (below).
104 enum acpi_irq_model_id acpi_irq_model
= ACPI_IRQ_MODEL_PIC
;
108 /* rely on all ACPI tables being in the direct mapping */
109 char *__init
__acpi_map_table(unsigned long phys_addr
, unsigned long size
)
111 if (!phys_addr
|| !size
)
114 if (phys_addr
+size
<= (end_pfn_map
<< PAGE_SHIFT
) + PAGE_SIZE
)
115 return __va(phys_addr
);
123 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
124 * to map the target physical address. The problem is that set_fixmap()
125 * provides a single page, and it is possible that the page is not
127 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
128 * i.e. until the next __va_range() call.
130 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
131 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
132 * count idx down while incrementing the phys address.
134 char *__init
__acpi_map_table(unsigned long phys
, unsigned long size
)
136 unsigned long base
, offset
, mapped_size
;
139 if (phys
+ size
< 8 * 1024 * 1024)
142 offset
= phys
& (PAGE_SIZE
- 1);
143 mapped_size
= PAGE_SIZE
- offset
;
144 set_fixmap(FIX_ACPI_END
, phys
);
145 base
= fix_to_virt(FIX_ACPI_END
);
148 * Most cases can be covered by the below.
151 while (mapped_size
< size
) {
152 if (--idx
< FIX_ACPI_BEGIN
)
153 return NULL
; /* cannot handle this */
155 set_fixmap(idx
, phys
);
156 mapped_size
+= PAGE_SIZE
;
159 return ((unsigned char *)base
+ offset
);
163 #ifdef CONFIG_PCI_MMCONFIG
164 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
165 struct acpi_mcfg_allocation
*pci_mmcfg_config
;
166 int pci_mmcfg_config_num
;
168 int __init
acpi_parse_mcfg(struct acpi_table_header
*header
)
170 struct acpi_table_mcfg
*mcfg
;
177 mcfg
= (struct acpi_table_mcfg
*)header
;
179 /* how many config structures do we have */
180 pci_mmcfg_config_num
= 0;
181 i
= header
->length
- sizeof(struct acpi_table_mcfg
);
182 while (i
>= sizeof(struct acpi_mcfg_allocation
)) {
183 ++pci_mmcfg_config_num
;
184 i
-= sizeof(struct acpi_mcfg_allocation
);
186 if (pci_mmcfg_config_num
== 0) {
187 printk(KERN_ERR PREFIX
"MMCONFIG has no entries\n");
191 config_size
= pci_mmcfg_config_num
* sizeof(*pci_mmcfg_config
);
192 pci_mmcfg_config
= kmalloc(config_size
, GFP_KERNEL
);
193 if (!pci_mmcfg_config
) {
194 printk(KERN_WARNING PREFIX
195 "No memory for MCFG config tables\n");
199 memcpy(pci_mmcfg_config
, &mcfg
[1], config_size
);
200 for (i
= 0; i
< pci_mmcfg_config_num
; ++i
) {
201 if (pci_mmcfg_config
[i
].address
> 0xFFFFFFFF) {
202 printk(KERN_ERR PREFIX
203 "MMCONFIG not in low 4GB of memory\n");
204 kfree(pci_mmcfg_config
);
205 pci_mmcfg_config_num
= 0;
212 #endif /* CONFIG_PCI_MMCONFIG */
214 #ifdef CONFIG_X86_LOCAL_APIC
215 static int __init
acpi_parse_madt(struct acpi_table_header
*table
)
217 struct acpi_table_madt
*madt
= NULL
;
222 madt
= (struct acpi_table_madt
*)table
;
224 printk(KERN_WARNING PREFIX
"Unable to map MADT\n");
229 acpi_lapic_addr
= (u64
) madt
->address
;
231 printk(KERN_DEBUG PREFIX
"Local APIC address 0x%08x\n",
235 acpi_madt_oem_check(madt
->header
.oem_id
, madt
->header
.oem_table_id
);
241 acpi_parse_lapic(struct acpi_subtable_header
* header
, const unsigned long end
)
243 struct acpi_madt_local_apic
*processor
= NULL
;
245 processor
= (struct acpi_madt_local_apic
*)header
;
247 if (BAD_MADT_ENTRY(processor
, end
))
250 acpi_table_print_madt_entry(header
);
253 * We need to register disabled CPU as well to permit
254 * counting disabled CPUs. This allows us to size
255 * cpus_possible_map more accurately, to permit
256 * to not preallocating memory for all NR_CPUS
257 * when we use CPU hotplug.
259 mp_register_lapic(processor
->id
, /* APIC ID */
260 processor
->lapic_flags
& ACPI_MADT_ENABLED
); /* Enabled? */
266 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header
* header
,
267 const unsigned long end
)
269 struct acpi_madt_local_apic_override
*lapic_addr_ovr
= NULL
;
271 lapic_addr_ovr
= (struct acpi_madt_local_apic_override
*)header
;
273 if (BAD_MADT_ENTRY(lapic_addr_ovr
, end
))
276 acpi_lapic_addr
= lapic_addr_ovr
->address
;
282 acpi_parse_lapic_nmi(struct acpi_subtable_header
* header
, const unsigned long end
)
284 struct acpi_madt_local_apic_nmi
*lapic_nmi
= NULL
;
286 lapic_nmi
= (struct acpi_madt_local_apic_nmi
*)header
;
288 if (BAD_MADT_ENTRY(lapic_nmi
, end
))
291 acpi_table_print_madt_entry(header
);
293 if (lapic_nmi
->lint
!= 1)
294 printk(KERN_WARNING PREFIX
"NMI not connected to LINT 1!\n");
299 #endif /*CONFIG_X86_LOCAL_APIC */
301 #ifdef CONFIG_X86_IO_APIC
304 acpi_parse_ioapic(struct acpi_subtable_header
* header
, const unsigned long end
)
306 struct acpi_madt_io_apic
*ioapic
= NULL
;
308 ioapic
= (struct acpi_madt_io_apic
*)header
;
310 if (BAD_MADT_ENTRY(ioapic
, end
))
313 acpi_table_print_madt_entry(header
);
315 mp_register_ioapic(ioapic
->id
,
316 ioapic
->address
, ioapic
->global_irq_base
);
322 * Parse Interrupt Source Override for the ACPI SCI
324 static void __init
acpi_sci_ioapic_setup(u32 gsi
, u16 polarity
, u16 trigger
)
326 if (trigger
== 0) /* compatible SCI trigger is level */
329 if (polarity
== 0) /* compatible SCI polarity is low */
332 /* Command-line over-ride via acpi_sci= */
333 if (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
)
334 trigger
= (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2;
336 if (acpi_sci_flags
& ACPI_MADT_POLARITY_MASK
)
337 polarity
= acpi_sci_flags
& ACPI_MADT_POLARITY_MASK
;
340 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
341 * If GSI is < 16, this will update its flags,
342 * else it will create a new mp_irqs[] entry.
344 mp_override_legacy_irq(gsi
, polarity
, trigger
, gsi
);
347 * stash over-ride to indicate we've been here
348 * and for later update of acpi_gbl_FADT
350 acpi_sci_override_gsi
= gsi
;
355 acpi_parse_int_src_ovr(struct acpi_subtable_header
* header
,
356 const unsigned long end
)
358 struct acpi_madt_interrupt_override
*intsrc
= NULL
;
360 intsrc
= (struct acpi_madt_interrupt_override
*)header
;
362 if (BAD_MADT_ENTRY(intsrc
, end
))
365 acpi_table_print_madt_entry(header
);
367 if (intsrc
->source_irq
== acpi_gbl_FADT
.sci_interrupt
) {
368 acpi_sci_ioapic_setup(intsrc
->global_irq
,
369 intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
,
370 (intsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2);
374 if (acpi_skip_timer_override
&&
375 intsrc
->source_irq
== 0 && intsrc
->global_irq
== 2) {
376 printk(PREFIX
"BIOS IRQ0 pin2 override ignored.\n");
380 mp_override_legacy_irq(intsrc
->source_irq
,
381 intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
,
382 (intsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2,
389 acpi_parse_nmi_src(struct acpi_subtable_header
* header
, const unsigned long end
)
391 struct acpi_madt_nmi_source
*nmi_src
= NULL
;
393 nmi_src
= (struct acpi_madt_nmi_source
*)header
;
395 if (BAD_MADT_ENTRY(nmi_src
, end
))
398 acpi_table_print_madt_entry(header
);
400 /* TBD: Support nimsrc entries? */
405 #endif /* CONFIG_X86_IO_APIC */
408 * acpi_pic_sci_set_trigger()
410 * use ELCR to set PIC-mode trigger type for SCI
412 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
413 * it may require Edge Trigger -- use "acpi_sci=edge"
415 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
416 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
417 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
418 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
421 void __init
acpi_pic_sci_set_trigger(unsigned int irq
, u16 trigger
)
423 unsigned int mask
= 1 << irq
;
424 unsigned int old
, new;
426 /* Real old ELCR mask */
427 old
= inb(0x4d0) | (inb(0x4d1) << 8);
430 * If we use ACPI to set PCI IRQs, then we should clear ELCR
431 * since we will set it correctly as we enable the PCI irq
434 new = acpi_noirq
? old
: 0;
437 * Update SCI information in the ELCR, it isn't in the PCI
441 case 1: /* Edge - clear */
444 case 3: /* Level - set */
452 printk(PREFIX
"setting ELCR to %04x (from %04x)\n", new, old
);
454 outb(new >> 8, 0x4d1);
457 int acpi_gsi_to_irq(u32 gsi
, unsigned int *irq
)
464 * success: return IRQ number (>=0)
465 * failure: return < 0
467 int acpi_register_gsi(u32 gsi
, int triggering
, int polarity
)
470 unsigned int plat_gsi
= gsi
;
474 * Make sure all (legacy) PCI IRQs are set as level-triggered.
476 if (acpi_irq_model
== ACPI_IRQ_MODEL_PIC
) {
477 extern void eisa_set_level_irq(unsigned int irq
);
479 if (triggering
== ACPI_LEVEL_SENSITIVE
)
480 eisa_set_level_irq(gsi
);
484 #ifdef CONFIG_X86_IO_APIC
485 if (acpi_irq_model
== ACPI_IRQ_MODEL_IOAPIC
) {
486 plat_gsi
= mp_register_gsi(gsi
, triggering
, polarity
);
489 acpi_gsi_to_irq(plat_gsi
, &irq
);
493 EXPORT_SYMBOL(acpi_register_gsi
);
496 * ACPI based hotplug support for CPU
498 #ifdef CONFIG_ACPI_HOTPLUG_CPU
499 int acpi_map_lsapic(acpi_handle handle
, int *pcpu
)
501 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
502 union acpi_object
*obj
;
503 struct acpi_madt_local_apic
*lapic
;
504 cpumask_t tmp_map
, new_map
;
508 if (ACPI_FAILURE(acpi_evaluate_object(handle
, "_MAT", NULL
, &buffer
)))
511 if (!buffer
.length
|| !buffer
.pointer
)
514 obj
= buffer
.pointer
;
515 if (obj
->type
!= ACPI_TYPE_BUFFER
||
516 obj
->buffer
.length
< sizeof(*lapic
)) {
517 kfree(buffer
.pointer
);
521 lapic
= (struct acpi_madt_local_apic
*)obj
->buffer
.pointer
;
523 if (lapic
->header
.type
!= ACPI_MADT_TYPE_LOCAL_APIC
||
524 !(lapic
->lapic_flags
& ACPI_MADT_ENABLED
)) {
525 kfree(buffer
.pointer
);
531 kfree(buffer
.pointer
);
532 buffer
.length
= ACPI_ALLOCATE_BUFFER
;
533 buffer
.pointer
= NULL
;
535 tmp_map
= cpu_present_map
;
536 mp_register_lapic(physid
, lapic
->lapic_flags
& ACPI_MADT_ENABLED
);
539 * If mp_register_lapic successfully generates a new logical cpu
540 * number, then the following will get us exactly what was mapped
542 cpus_andnot(new_map
, cpu_present_map
, tmp_map
);
543 if (cpus_empty(new_map
)) {
544 printk ("Unable to map lapic to logical cpu number\n");
548 cpu
= first_cpu(new_map
);
554 EXPORT_SYMBOL(acpi_map_lsapic
);
556 int acpi_unmap_lsapic(int cpu
)
558 per_cpu(x86_cpu_to_apicid
, cpu
) = -1;
559 cpu_clear(cpu
, cpu_present_map
);
565 EXPORT_SYMBOL(acpi_unmap_lsapic
);
566 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
568 int acpi_register_ioapic(acpi_handle handle
, u64 phys_addr
, u32 gsi_base
)
574 EXPORT_SYMBOL(acpi_register_ioapic
);
576 int acpi_unregister_ioapic(acpi_handle handle
, u32 gsi_base
)
582 EXPORT_SYMBOL(acpi_unregister_ioapic
);
584 static unsigned long __init
585 acpi_scan_rsdp(unsigned long start
, unsigned long length
)
587 unsigned long offset
= 0;
588 unsigned long sig_len
= sizeof("RSD PTR ") - 1;
591 * Scan all 16-byte boundaries of the physical memory region for the
594 for (offset
= 0; offset
< length
; offset
+= 16) {
595 if (strncmp((char *)(phys_to_virt(start
) + offset
), "RSD PTR ", sig_len
))
597 return (start
+ offset
);
603 static int __init
acpi_parse_sbf(struct acpi_table_header
*table
)
605 struct acpi_table_boot
*sb
;
607 sb
= (struct acpi_table_boot
*)table
;
609 printk(KERN_WARNING PREFIX
"Unable to map SBF\n");
613 sbf_port
= sb
->cmos_index
; /* Save CMOS port */
618 #ifdef CONFIG_HPET_TIMER
619 #include <asm/hpet.h>
621 static struct __initdata resource
*hpet_res
;
623 static int __init
acpi_parse_hpet(struct acpi_table_header
*table
)
625 struct acpi_table_hpet
*hpet_tbl
;
627 hpet_tbl
= (struct acpi_table_hpet
*)table
;
629 printk(KERN_WARNING PREFIX
"Unable to map HPET\n");
633 if (hpet_tbl
->address
.space_id
!= ACPI_SPACE_MEM
) {
634 printk(KERN_WARNING PREFIX
"HPET timers must be located in "
639 hpet_address
= hpet_tbl
->address
.address
;
642 * Some broken BIOSes advertise HPET at 0x0. We really do not
643 * want to allocate a resource there.
646 printk(KERN_WARNING PREFIX
647 "HPET id: %#x base: %#lx is invalid\n",
648 hpet_tbl
->id
, hpet_address
);
653 * Some even more broken BIOSes advertise HPET at
654 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
657 if (hpet_address
== 0xfed0000000000000UL
) {
658 if (!hpet_force_user
) {
659 printk(KERN_WARNING PREFIX
"HPET id: %#x "
660 "base: 0xfed0000000000000 is bogus\n "
661 "try hpet=force on the kernel command line to "
662 "fix it up to 0xfed00000.\n", hpet_tbl
->id
);
666 printk(KERN_WARNING PREFIX
667 "HPET id: %#x base: 0xfed0000000000000 fixed up "
668 "to 0xfed00000.\n", hpet_tbl
->id
);
672 printk(KERN_INFO PREFIX
"HPET id: %#x base: %#lx\n",
673 hpet_tbl
->id
, hpet_address
);
676 * Allocate and initialize the HPET firmware resource for adding into
677 * the resource tree during the lateinit timeframe.
679 #define HPET_RESOURCE_NAME_SIZE 9
680 hpet_res
= alloc_bootmem(sizeof(*hpet_res
) + HPET_RESOURCE_NAME_SIZE
);
685 memset(hpet_res
, 0, sizeof(*hpet_res
));
686 hpet_res
->name
= (void *)&hpet_res
[1];
687 hpet_res
->flags
= IORESOURCE_MEM
;
688 snprintf((char *)hpet_res
->name
, HPET_RESOURCE_NAME_SIZE
, "HPET %u",
691 hpet_res
->start
= hpet_address
;
692 hpet_res
->end
= hpet_address
+ (1 * 1024) - 1;
698 * hpet_insert_resource inserts the HPET resources used into the resource
701 static __init
int hpet_insert_resource(void)
706 return insert_resource(&iomem_resource
, hpet_res
);
709 late_initcall(hpet_insert_resource
);
712 #define acpi_parse_hpet NULL
715 static int __init
acpi_parse_fadt(struct acpi_table_header
*table
)
718 #ifdef CONFIG_X86_PM_TIMER
719 /* detect the location of the ACPI PM Timer */
720 if (acpi_gbl_FADT
.header
.revision
>= FADT2_REVISION_ID
) {
722 if (acpi_gbl_FADT
.xpm_timer_block
.space_id
!=
723 ACPI_ADR_SPACE_SYSTEM_IO
)
726 pmtmr_ioport
= acpi_gbl_FADT
.xpm_timer_block
.address
;
728 * "X" fields are optional extensions to the original V1.0
729 * fields, so we must selectively expand V1.0 fields if the
730 * corresponding X field is zero.
733 pmtmr_ioport
= acpi_gbl_FADT
.pm_timer_block
;
736 pmtmr_ioport
= acpi_gbl_FADT
.pm_timer_block
;
739 printk(KERN_INFO PREFIX
"PM-Timer IO Port: %#x\n",
745 unsigned long __init
acpi_find_rsdp(void)
747 unsigned long rsdp_phys
= 0;
750 if (efi
.acpi20
!= EFI_INVALID_TABLE_ADDR
)
752 else if (efi
.acpi
!= EFI_INVALID_TABLE_ADDR
)
756 * Scan memory looking for the RSDP signature. First search EBDA (low
757 * memory) paragraphs and then search upper memory (E0000-FFFFF).
759 rsdp_phys
= acpi_scan_rsdp(0, 0x400);
761 rsdp_phys
= acpi_scan_rsdp(0xE0000, 0x20000);
766 #ifdef CONFIG_X86_LOCAL_APIC
768 * Parse LAPIC entries in MADT
769 * returns 0 on success, < 0 on error
771 static int __init
acpi_parse_madt_lapic_entries(void)
779 * Note that the LAPIC address is obtained from the MADT (32-bit value)
780 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
784 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE
,
785 acpi_parse_lapic_addr_ovr
, 0);
787 printk(KERN_ERR PREFIX
788 "Error parsing LAPIC address override entry\n");
792 mp_register_lapic_address(acpi_lapic_addr
);
794 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC
, acpi_parse_lapic
,
797 printk(KERN_ERR PREFIX
"No LAPIC entries present\n");
798 /* TBD: Cleanup to allow fallback to MPS */
800 } else if (count
< 0) {
801 printk(KERN_ERR PREFIX
"Error parsing LAPIC entry\n");
802 /* TBD: Cleanup to allow fallback to MPS */
807 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI
, acpi_parse_lapic_nmi
, 0);
809 printk(KERN_ERR PREFIX
"Error parsing LAPIC NMI entry\n");
810 /* TBD: Cleanup to allow fallback to MPS */
815 #endif /* CONFIG_X86_LOCAL_APIC */
817 #ifdef CONFIG_X86_IO_APIC
819 * Parse IOAPIC related entries in MADT
820 * returns 0 on success, < 0 on error
822 static int __init
acpi_parse_madt_ioapic_entries(void)
827 * ACPI interpreter is required to complete interrupt setup,
828 * so if it is off, don't enumerate the io-apics with ACPI.
829 * If MPS is present, it will handle them,
830 * otherwise the system will stay in PIC mode
832 if (acpi_disabled
|| acpi_noirq
) {
840 * if "noapic" boot option, don't look for IO-APICs
842 if (skip_ioapic_setup
) {
843 printk(KERN_INFO PREFIX
"Skipping IOAPIC probe "
844 "due to 'noapic' option.\n");
849 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC
, acpi_parse_ioapic
,
852 printk(KERN_ERR PREFIX
"No IOAPIC entries present\n");
854 } else if (count
< 0) {
855 printk(KERN_ERR PREFIX
"Error parsing IOAPIC entry\n");
860 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE
, acpi_parse_int_src_ovr
,
863 printk(KERN_ERR PREFIX
864 "Error parsing interrupt source overrides entry\n");
865 /* TBD: Cleanup to allow fallback to MPS */
870 * If BIOS did not supply an INT_SRC_OVR for the SCI
871 * pretend we got one so we can set the SCI flags.
873 if (!acpi_sci_override_gsi
)
874 acpi_sci_ioapic_setup(acpi_gbl_FADT
.sci_interrupt
, 0, 0);
876 /* Fill in identity legacy mapings where no override */
877 mp_config_acpi_legacy_irqs();
880 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE
, acpi_parse_nmi_src
,
883 printk(KERN_ERR PREFIX
"Error parsing NMI SRC entry\n");
884 /* TBD: Cleanup to allow fallback to MPS */
891 static inline int acpi_parse_madt_ioapic_entries(void)
895 #endif /* !CONFIG_X86_IO_APIC */
897 static void __init
acpi_process_madt(void)
899 #ifdef CONFIG_X86_LOCAL_APIC
902 if (!acpi_table_parse(ACPI_SIG_MADT
, acpi_parse_madt
)) {
905 * Parse MADT LAPIC entries
907 error
= acpi_parse_madt_lapic_entries();
911 #ifdef CONFIG_X86_GENERICARCH
912 generic_bigsmp_probe();
915 * Parse MADT IO-APIC entries
917 error
= acpi_parse_madt_ioapic_entries();
919 acpi_irq_model
= ACPI_IRQ_MODEL_IOAPIC
;
920 acpi_irq_balance_set(NULL
);
923 smp_found_config
= 1;
924 setup_apic_routing();
927 if (error
== -EINVAL
) {
929 * Dell Precision Workstation 410, 610 come here.
931 printk(KERN_ERR PREFIX
932 "Invalid BIOS MADT, disabling ACPI\n");
942 static int __init
disable_acpi_irq(const struct dmi_system_id
*d
)
945 printk(KERN_NOTICE
"%s detected: force use of acpi=noirq\n",
952 static int __init
disable_acpi_pci(const struct dmi_system_id
*d
)
955 printk(KERN_NOTICE
"%s detected: force use of pci=noacpi\n",
962 static int __init
dmi_disable_acpi(const struct dmi_system_id
*d
)
965 printk(KERN_NOTICE
"%s detected: acpi off\n", d
->ident
);
969 "Warning: DMI blacklist says broken, but acpi forced\n");
975 * Limit ACPI to CPU enumeration for HT
977 static int __init
force_acpi_ht(const struct dmi_system_id
*d
)
980 printk(KERN_NOTICE
"%s detected: force use of acpi=ht\n",
986 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
992 * If your system is blacklisted here, but you find that acpi=force
993 * works for you, please contact acpi-devel@sourceforge.net
995 static struct dmi_system_id __initdata acpi_dmi_table
[] = {
997 * Boxes that need ACPI disabled
1000 .callback
= dmi_disable_acpi
,
1001 .ident
= "IBM Thinkpad",
1003 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1004 DMI_MATCH(DMI_BOARD_NAME
, "2629H1G"),
1009 * Boxes that need acpi=ht
1012 .callback
= force_acpi_ht
,
1013 .ident
= "FSC Primergy T850",
1015 DMI_MATCH(DMI_SYS_VENDOR
, "FUJITSU SIEMENS"),
1016 DMI_MATCH(DMI_PRODUCT_NAME
, "PRIMERGY T850"),
1020 .callback
= force_acpi_ht
,
1021 .ident
= "HP VISUALIZE NT Workstation",
1023 DMI_MATCH(DMI_BOARD_VENDOR
, "Hewlett-Packard"),
1024 DMI_MATCH(DMI_PRODUCT_NAME
, "HP VISUALIZE NT Workstation"),
1028 .callback
= force_acpi_ht
,
1029 .ident
= "Compaq Workstation W8000",
1031 DMI_MATCH(DMI_SYS_VENDOR
, "Compaq"),
1032 DMI_MATCH(DMI_PRODUCT_NAME
, "Workstation W8000"),
1036 .callback
= force_acpi_ht
,
1037 .ident
= "ASUS P4B266",
1039 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1040 DMI_MATCH(DMI_BOARD_NAME
, "P4B266"),
1044 .callback
= force_acpi_ht
,
1045 .ident
= "ASUS P2B-DS",
1047 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1048 DMI_MATCH(DMI_BOARD_NAME
, "P2B-DS"),
1052 .callback
= force_acpi_ht
,
1053 .ident
= "ASUS CUR-DLS",
1055 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1056 DMI_MATCH(DMI_BOARD_NAME
, "CUR-DLS"),
1060 .callback
= force_acpi_ht
,
1061 .ident
= "ABIT i440BX-W83977",
1063 DMI_MATCH(DMI_BOARD_VENDOR
, "ABIT <http://www.abit.com>"),
1064 DMI_MATCH(DMI_BOARD_NAME
, "i440BX-W83977 (BP6)"),
1068 .callback
= force_acpi_ht
,
1069 .ident
= "IBM Bladecenter",
1071 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1072 DMI_MATCH(DMI_BOARD_NAME
, "IBM eServer BladeCenter HS20"),
1076 .callback
= force_acpi_ht
,
1077 .ident
= "IBM eServer xSeries 360",
1079 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1080 DMI_MATCH(DMI_BOARD_NAME
, "eServer xSeries 360"),
1084 .callback
= force_acpi_ht
,
1085 .ident
= "IBM eserver xSeries 330",
1087 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1088 DMI_MATCH(DMI_BOARD_NAME
, "eserver xSeries 330"),
1092 .callback
= force_acpi_ht
,
1093 .ident
= "IBM eserver xSeries 440",
1095 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1096 DMI_MATCH(DMI_PRODUCT_NAME
, "eserver xSeries 440"),
1101 * Boxes that need ACPI PCI IRQ routing disabled
1104 .callback
= disable_acpi_irq
,
1105 .ident
= "ASUS A7V",
1107 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC"),
1108 DMI_MATCH(DMI_BOARD_NAME
, "<A7V>"),
1109 /* newer BIOS, Revision 1011, does work */
1110 DMI_MATCH(DMI_BIOS_VERSION
,
1111 "ASUS A7V ACPI BIOS Revision 1007"),
1116 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1117 * for LPC bridge, which is needed for the PCI
1118 * interrupt links to work. DSDT fix is in bug 5966.
1119 * 2645, 2646 model numbers are shared with 600/600E/600X
1121 .callback
= disable_acpi_irq
,
1122 .ident
= "IBM Thinkpad 600 Series 2645",
1124 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1125 DMI_MATCH(DMI_BOARD_NAME
, "2645"),
1129 .callback
= disable_acpi_irq
,
1130 .ident
= "IBM Thinkpad 600 Series 2646",
1132 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1133 DMI_MATCH(DMI_BOARD_NAME
, "2646"),
1137 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1140 .callback
= disable_acpi_pci
,
1141 .ident
= "ASUS PR-DLS",
1143 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1144 DMI_MATCH(DMI_BOARD_NAME
, "PR-DLS"),
1145 DMI_MATCH(DMI_BIOS_VERSION
,
1146 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1147 DMI_MATCH(DMI_BIOS_DATE
, "03/21/2003")
1151 .callback
= disable_acpi_pci
,
1152 .ident
= "Acer TravelMate 36x Laptop",
1154 DMI_MATCH(DMI_SYS_VENDOR
, "Acer"),
1155 DMI_MATCH(DMI_PRODUCT_NAME
, "TravelMate 360"),
1161 #endif /* __i386__ */
1164 * acpi_boot_table_init() and acpi_boot_init()
1165 * called from setup_arch(), always.
1166 * 1. checksums all tables
1167 * 2. enumerates lapics
1168 * 3. enumerates io-apics
1170 * acpi_table_init() is separate to allow reading SRAT without
1171 * other side effects.
1173 * side effects of acpi_boot_init:
1174 * acpi_lapic = 1 if LAPIC found
1175 * acpi_ioapic = 1 if IOAPIC found
1176 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1177 * if acpi_blacklisted() acpi_disabled = 1;
1178 * acpi_irq_model=...
1181 * return value: (currently ignored)
1186 int __init
acpi_boot_table_init(void)
1191 dmi_check_system(acpi_dmi_table
);
1195 * If acpi_disabled, bail out
1196 * One exception: acpi=ht continues far enough to enumerate LAPICs
1198 if (acpi_disabled
&& !acpi_ht
)
1202 * Initialize the ACPI boot-time table parser.
1204 error
= acpi_table_init();
1210 acpi_table_parse(ACPI_SIG_BOOT
, acpi_parse_sbf
);
1213 * blacklist may disable ACPI entirely
1215 error
= acpi_blacklisted();
1218 printk(KERN_WARNING PREFIX
"acpi=force override\n");
1220 printk(KERN_WARNING PREFIX
"Disabling ACPI support\n");
1229 int __init
acpi_boot_init(void)
1232 * If acpi_disabled, bail out
1233 * One exception: acpi=ht continues far enough to enumerate LAPICs
1235 if (acpi_disabled
&& !acpi_ht
)
1238 acpi_table_parse(ACPI_SIG_BOOT
, acpi_parse_sbf
);
1241 * set sci_int and PM timer address
1243 acpi_table_parse(ACPI_SIG_FADT
, acpi_parse_fadt
);
1246 * Process the Multiple APIC Description Table (MADT), if present
1248 acpi_process_madt();
1250 acpi_table_parse(ACPI_SIG_HPET
, acpi_parse_hpet
);
1255 static int __init
parse_acpi(char *arg
)
1260 /* "acpi=off" disables both ACPI table parsing and interpreter */
1261 if (strcmp(arg
, "off") == 0) {
1264 /* acpi=force to over-ride black-list */
1265 else if (strcmp(arg
, "force") == 0) {
1270 /* acpi=strict disables out-of-spec workarounds */
1271 else if (strcmp(arg
, "strict") == 0) {
1274 /* Limit ACPI just to boot-time to enable HT */
1275 else if (strcmp(arg
, "ht") == 0) {
1280 /* "acpi=noirq" disables ACPI interrupt routing */
1281 else if (strcmp(arg
, "noirq") == 0) {
1284 /* Core will printk when we return error. */
1289 early_param("acpi", parse_acpi
);
1291 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1292 static int __init
parse_pci(char *arg
)
1294 if (arg
&& strcmp(arg
, "noacpi") == 0)
1298 early_param("pci", parse_pci
);
1300 #ifdef CONFIG_X86_IO_APIC
1301 static int __init
parse_acpi_skip_timer_override(char *arg
)
1303 acpi_skip_timer_override
= 1;
1306 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override
);
1308 static int __init
parse_acpi_use_timer_override(char *arg
)
1310 acpi_use_timer_override
= 1;
1313 early_param("acpi_use_timer_override", parse_acpi_use_timer_override
);
1314 #endif /* CONFIG_X86_IO_APIC */
1316 static int __init
setup_acpi_sci(char *s
)
1320 if (!strcmp(s
, "edge"))
1321 acpi_sci_flags
= ACPI_MADT_TRIGGER_EDGE
|
1322 (acpi_sci_flags
& ~ACPI_MADT_TRIGGER_MASK
);
1323 else if (!strcmp(s
, "level"))
1324 acpi_sci_flags
= ACPI_MADT_TRIGGER_LEVEL
|
1325 (acpi_sci_flags
& ~ACPI_MADT_TRIGGER_MASK
);
1326 else if (!strcmp(s
, "high"))
1327 acpi_sci_flags
= ACPI_MADT_POLARITY_ACTIVE_HIGH
|
1328 (acpi_sci_flags
& ~ACPI_MADT_POLARITY_MASK
);
1329 else if (!strcmp(s
, "low"))
1330 acpi_sci_flags
= ACPI_MADT_POLARITY_ACTIVE_LOW
|
1331 (acpi_sci_flags
& ~ACPI_MADT_POLARITY_MASK
);
1336 early_param("acpi_sci", setup_acpi_sci
);
1338 int __acpi_acquire_global_lock(unsigned int *lock
)
1340 unsigned int old
, new, val
;
1343 new = (((old
& ~0x3) + 2) + ((old
>> 1) & 0x1));
1344 val
= cmpxchg(lock
, old
, new);
1345 } while (unlikely (val
!= old
));
1346 return (new < 3) ? -1 : 0;
1349 int __acpi_release_global_lock(unsigned int *lock
)
1351 unsigned int old
, new, val
;
1355 val
= cmpxchg(lock
, old
, new);
1356 } while (unlikely (val
!= old
));