2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
26 #include <linux/init.h>
27 #include <linux/acpi.h>
28 #include <linux/acpi_pmtmr.h>
29 #include <linux/efi.h>
30 #include <linux/cpumask.h>
31 #include <linux/module.h>
32 #include <linux/dmi.h>
33 #include <linux/irq.h>
34 #include <linux/bootmem.h>
35 #include <linux/ioport.h>
37 #include <asm/pgtable.h>
38 #include <asm/io_apic.h>
41 #include <asm/mpspec.h>
43 #ifdef CONFIG_X86_LOCAL_APIC
44 # include <mach_apic.h>
47 static int __initdata acpi_force
= 0;
50 int acpi_disabled
= 0;
52 int acpi_disabled
= 1;
54 EXPORT_SYMBOL(acpi_disabled
);
58 #include <asm/proto.h>
59 #include <asm/genapic.h>
63 #ifdef CONFIG_X86_LOCAL_APIC
64 #include <mach_apic.h>
65 #include <mach_mpparse.h>
66 #endif /* CONFIG_X86_LOCAL_APIC */
70 #define BAD_MADT_ENTRY(entry, end) ( \
71 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
72 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
74 #define PREFIX "ACPI: "
76 int acpi_noirq
; /* skip ACPI IRQ initialization */
77 int acpi_pci_disabled
; /* skip ACPI PCI scan and IRQ initialization */
78 EXPORT_SYMBOL(acpi_pci_disabled
);
79 int acpi_ht __initdata
= 1; /* enable HT */
85 u8 acpi_sci_flags __initdata
;
86 int acpi_sci_override_gsi __initdata
;
87 int acpi_skip_timer_override __initdata
;
88 int acpi_use_timer_override __initdata
;
90 #ifdef CONFIG_X86_LOCAL_APIC
91 static u64 acpi_lapic_addr __initdata
= APIC_DEFAULT_PHYS_BASE
;
94 #ifndef __HAVE_ARCH_CMPXCHG
95 #warning ACPI uses CMPXCHG, i486 and later hardware
98 /* --------------------------------------------------------------------------
99 Boot-time Configuration
100 -------------------------------------------------------------------------- */
103 * The default interrupt routing model is PIC (8259). This gets
104 * overridden if IOAPICs are enumerated (below).
106 enum acpi_irq_model_id acpi_irq_model
= ACPI_IRQ_MODEL_PIC
;
110 /* rely on all ACPI tables being in the direct mapping */
111 char *__init
__acpi_map_table(unsigned long phys_addr
, unsigned long size
)
113 if (!phys_addr
|| !size
)
116 if (phys_addr
+size
<= (max_pfn_mapped
<< PAGE_SHIFT
) + PAGE_SIZE
)
117 return __va(phys_addr
);
125 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
126 * to map the target physical address. The problem is that set_fixmap()
127 * provides a single page, and it is possible that the page is not
129 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
130 * i.e. until the next __va_range() call.
132 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
133 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
134 * count idx down while incrementing the phys address.
136 char *__init
__acpi_map_table(unsigned long phys
, unsigned long size
)
138 unsigned long base
, offset
, mapped_size
;
141 if (phys
+ size
< 8 * 1024 * 1024)
144 offset
= phys
& (PAGE_SIZE
- 1);
145 mapped_size
= PAGE_SIZE
- offset
;
146 set_fixmap(FIX_ACPI_END
, phys
);
147 base
= fix_to_virt(FIX_ACPI_END
);
150 * Most cases can be covered by the below.
153 while (mapped_size
< size
) {
154 if (--idx
< FIX_ACPI_BEGIN
)
155 return NULL
; /* cannot handle this */
157 set_fixmap(idx
, phys
);
158 mapped_size
+= PAGE_SIZE
;
161 return ((unsigned char *)base
+ offset
);
165 #ifdef CONFIG_PCI_MMCONFIG
166 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
167 struct acpi_mcfg_allocation
*pci_mmcfg_config
;
168 int pci_mmcfg_config_num
;
170 int __init
acpi_parse_mcfg(struct acpi_table_header
*header
)
172 struct acpi_table_mcfg
*mcfg
;
179 mcfg
= (struct acpi_table_mcfg
*)header
;
181 /* how many config structures do we have */
182 pci_mmcfg_config_num
= 0;
183 i
= header
->length
- sizeof(struct acpi_table_mcfg
);
184 while (i
>= sizeof(struct acpi_mcfg_allocation
)) {
185 ++pci_mmcfg_config_num
;
186 i
-= sizeof(struct acpi_mcfg_allocation
);
188 if (pci_mmcfg_config_num
== 0) {
189 printk(KERN_ERR PREFIX
"MMCONFIG has no entries\n");
193 config_size
= pci_mmcfg_config_num
* sizeof(*pci_mmcfg_config
);
194 pci_mmcfg_config
= kmalloc(config_size
, GFP_KERNEL
);
195 if (!pci_mmcfg_config
) {
196 printk(KERN_WARNING PREFIX
197 "No memory for MCFG config tables\n");
201 memcpy(pci_mmcfg_config
, &mcfg
[1], config_size
);
202 for (i
= 0; i
< pci_mmcfg_config_num
; ++i
) {
203 if (pci_mmcfg_config
[i
].address
> 0xFFFFFFFF) {
204 printk(KERN_ERR PREFIX
205 "MMCONFIG not in low 4GB of memory\n");
206 kfree(pci_mmcfg_config
);
207 pci_mmcfg_config_num
= 0;
214 #endif /* CONFIG_PCI_MMCONFIG */
216 #ifdef CONFIG_X86_LOCAL_APIC
217 static int __init
acpi_parse_madt(struct acpi_table_header
*table
)
219 struct acpi_table_madt
*madt
= NULL
;
224 madt
= (struct acpi_table_madt
*)table
;
226 printk(KERN_WARNING PREFIX
"Unable to map MADT\n");
231 acpi_lapic_addr
= (u64
) madt
->address
;
233 printk(KERN_DEBUG PREFIX
"Local APIC address 0x%08x\n",
237 acpi_madt_oem_check(madt
->header
.oem_id
, madt
->header
.oem_table_id
);
243 acpi_parse_lapic(struct acpi_subtable_header
* header
, const unsigned long end
)
245 struct acpi_madt_local_apic
*processor
= NULL
;
247 processor
= (struct acpi_madt_local_apic
*)header
;
249 if (BAD_MADT_ENTRY(processor
, end
))
252 acpi_table_print_madt_entry(header
);
255 * We need to register disabled CPU as well to permit
256 * counting disabled CPUs. This allows us to size
257 * cpus_possible_map more accurately, to permit
258 * to not preallocating memory for all NR_CPUS
259 * when we use CPU hotplug.
261 mp_register_lapic(processor
->id
, /* APIC ID */
262 processor
->lapic_flags
& ACPI_MADT_ENABLED
); /* Enabled? */
268 acpi_parse_sapic(struct acpi_subtable_header
*header
, const unsigned long end
)
270 struct acpi_madt_local_sapic
*processor
= NULL
;
272 processor
= (struct acpi_madt_local_sapic
*)header
;
274 if (BAD_MADT_ENTRY(processor
, end
))
277 acpi_table_print_madt_entry(header
);
279 mp_register_lapic((processor
->id
<< 8) | processor
->eid
,/* APIC ID */
280 processor
->lapic_flags
& ACPI_MADT_ENABLED
); /* Enabled? */
286 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header
* header
,
287 const unsigned long end
)
289 struct acpi_madt_local_apic_override
*lapic_addr_ovr
= NULL
;
291 lapic_addr_ovr
= (struct acpi_madt_local_apic_override
*)header
;
293 if (BAD_MADT_ENTRY(lapic_addr_ovr
, end
))
296 acpi_lapic_addr
= lapic_addr_ovr
->address
;
302 acpi_parse_lapic_nmi(struct acpi_subtable_header
* header
, const unsigned long end
)
304 struct acpi_madt_local_apic_nmi
*lapic_nmi
= NULL
;
306 lapic_nmi
= (struct acpi_madt_local_apic_nmi
*)header
;
308 if (BAD_MADT_ENTRY(lapic_nmi
, end
))
311 acpi_table_print_madt_entry(header
);
313 if (lapic_nmi
->lint
!= 1)
314 printk(KERN_WARNING PREFIX
"NMI not connected to LINT 1!\n");
319 #endif /*CONFIG_X86_LOCAL_APIC */
321 #ifdef CONFIG_X86_IO_APIC
323 struct mp_ioapic_routing mp_ioapic_routing
[MAX_IO_APICS
];
326 acpi_parse_ioapic(struct acpi_subtable_header
* header
, const unsigned long end
)
328 struct acpi_madt_io_apic
*ioapic
= NULL
;
330 ioapic
= (struct acpi_madt_io_apic
*)header
;
332 if (BAD_MADT_ENTRY(ioapic
, end
))
335 acpi_table_print_madt_entry(header
);
337 mp_register_ioapic(ioapic
->id
,
338 ioapic
->address
, ioapic
->global_irq_base
);
344 * Parse Interrupt Source Override for the ACPI SCI
346 static void __init
acpi_sci_ioapic_setup(u32 gsi
, u16 polarity
, u16 trigger
)
348 if (trigger
== 0) /* compatible SCI trigger is level */
351 if (polarity
== 0) /* compatible SCI polarity is low */
354 /* Command-line over-ride via acpi_sci= */
355 if (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
)
356 trigger
= (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2;
358 if (acpi_sci_flags
& ACPI_MADT_POLARITY_MASK
)
359 polarity
= acpi_sci_flags
& ACPI_MADT_POLARITY_MASK
;
362 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
363 * If GSI is < 16, this will update its flags,
364 * else it will create a new mp_irqs[] entry.
366 mp_override_legacy_irq(gsi
, polarity
, trigger
, gsi
);
369 * stash over-ride to indicate we've been here
370 * and for later update of acpi_gbl_FADT
372 acpi_sci_override_gsi
= gsi
;
377 acpi_parse_int_src_ovr(struct acpi_subtable_header
* header
,
378 const unsigned long end
)
380 struct acpi_madt_interrupt_override
*intsrc
= NULL
;
382 intsrc
= (struct acpi_madt_interrupt_override
*)header
;
384 if (BAD_MADT_ENTRY(intsrc
, end
))
387 acpi_table_print_madt_entry(header
);
389 if (intsrc
->source_irq
== acpi_gbl_FADT
.sci_interrupt
) {
390 acpi_sci_ioapic_setup(intsrc
->global_irq
,
391 intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
,
392 (intsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2);
396 if (acpi_skip_timer_override
&&
397 intsrc
->source_irq
== 0 && intsrc
->global_irq
== 2) {
398 printk(PREFIX
"BIOS IRQ0 pin2 override ignored.\n");
402 mp_override_legacy_irq(intsrc
->source_irq
,
403 intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
,
404 (intsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2,
411 acpi_parse_nmi_src(struct acpi_subtable_header
* header
, const unsigned long end
)
413 struct acpi_madt_nmi_source
*nmi_src
= NULL
;
415 nmi_src
= (struct acpi_madt_nmi_source
*)header
;
417 if (BAD_MADT_ENTRY(nmi_src
, end
))
420 acpi_table_print_madt_entry(header
);
422 /* TBD: Support nimsrc entries? */
427 #endif /* CONFIG_X86_IO_APIC */
430 * acpi_pic_sci_set_trigger()
432 * use ELCR to set PIC-mode trigger type for SCI
434 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
435 * it may require Edge Trigger -- use "acpi_sci=edge"
437 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
438 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
439 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
440 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
443 void __init
acpi_pic_sci_set_trigger(unsigned int irq
, u16 trigger
)
445 unsigned int mask
= 1 << irq
;
446 unsigned int old
, new;
448 /* Real old ELCR mask */
449 old
= inb(0x4d0) | (inb(0x4d1) << 8);
452 * If we use ACPI to set PCI IRQs, then we should clear ELCR
453 * since we will set it correctly as we enable the PCI irq
456 new = acpi_noirq
? old
: 0;
459 * Update SCI information in the ELCR, it isn't in the PCI
463 case 1: /* Edge - clear */
466 case 3: /* Level - set */
474 printk(PREFIX
"setting ELCR to %04x (from %04x)\n", new, old
);
476 outb(new >> 8, 0x4d1);
479 int acpi_gsi_to_irq(u32 gsi
, unsigned int *irq
)
486 * success: return IRQ number (>=0)
487 * failure: return < 0
489 int acpi_register_gsi(u32 gsi
, int triggering
, int polarity
)
492 unsigned int plat_gsi
= gsi
;
496 * Make sure all (legacy) PCI IRQs are set as level-triggered.
498 if (acpi_irq_model
== ACPI_IRQ_MODEL_PIC
) {
499 extern void eisa_set_level_irq(unsigned int irq
);
501 if (triggering
== ACPI_LEVEL_SENSITIVE
)
502 eisa_set_level_irq(gsi
);
506 #ifdef CONFIG_X86_IO_APIC
507 if (acpi_irq_model
== ACPI_IRQ_MODEL_IOAPIC
) {
508 plat_gsi
= mp_register_gsi(gsi
, triggering
, polarity
);
511 acpi_gsi_to_irq(plat_gsi
, &irq
);
516 * ACPI based hotplug support for CPU
518 #ifdef CONFIG_ACPI_HOTPLUG_CPU
520 static int __cpuinit
_acpi_map_lsapic(acpi_handle handle
, int *pcpu
)
522 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
523 union acpi_object
*obj
;
524 struct acpi_madt_local_apic
*lapic
;
525 cpumask_t tmp_map
, new_map
;
529 if (ACPI_FAILURE(acpi_evaluate_object(handle
, "_MAT", NULL
, &buffer
)))
532 if (!buffer
.length
|| !buffer
.pointer
)
535 obj
= buffer
.pointer
;
536 if (obj
->type
!= ACPI_TYPE_BUFFER
||
537 obj
->buffer
.length
< sizeof(*lapic
)) {
538 kfree(buffer
.pointer
);
542 lapic
= (struct acpi_madt_local_apic
*)obj
->buffer
.pointer
;
544 if (lapic
->header
.type
!= ACPI_MADT_TYPE_LOCAL_APIC
||
545 !(lapic
->lapic_flags
& ACPI_MADT_ENABLED
)) {
546 kfree(buffer
.pointer
);
552 kfree(buffer
.pointer
);
553 buffer
.length
= ACPI_ALLOCATE_BUFFER
;
554 buffer
.pointer
= NULL
;
556 tmp_map
= cpu_present_map
;
557 mp_register_lapic(physid
, lapic
->lapic_flags
& ACPI_MADT_ENABLED
);
560 * If mp_register_lapic successfully generates a new logical cpu
561 * number, then the following will get us exactly what was mapped
563 cpus_andnot(new_map
, cpu_present_map
, tmp_map
);
564 if (cpus_empty(new_map
)) {
565 printk ("Unable to map lapic to logical cpu number\n");
569 cpu
= first_cpu(new_map
);
575 /* wrapper to silence section mismatch warning */
576 int __ref
acpi_map_lsapic(acpi_handle handle
, int *pcpu
)
578 return _acpi_map_lsapic(handle
, pcpu
);
580 EXPORT_SYMBOL(acpi_map_lsapic
);
582 int acpi_unmap_lsapic(int cpu
)
584 per_cpu(x86_cpu_to_apicid
, cpu
) = -1;
585 cpu_clear(cpu
, cpu_present_map
);
591 EXPORT_SYMBOL(acpi_unmap_lsapic
);
592 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
594 int acpi_register_ioapic(acpi_handle handle
, u64 phys_addr
, u32 gsi_base
)
600 EXPORT_SYMBOL(acpi_register_ioapic
);
602 int acpi_unregister_ioapic(acpi_handle handle
, u32 gsi_base
)
608 EXPORT_SYMBOL(acpi_unregister_ioapic
);
610 static int __init
acpi_parse_sbf(struct acpi_table_header
*table
)
612 struct acpi_table_boot
*sb
;
614 sb
= (struct acpi_table_boot
*)table
;
616 printk(KERN_WARNING PREFIX
"Unable to map SBF\n");
620 sbf_port
= sb
->cmos_index
; /* Save CMOS port */
625 #ifdef CONFIG_HPET_TIMER
626 #include <asm/hpet.h>
628 static struct __initdata resource
*hpet_res
;
630 static int __init
acpi_parse_hpet(struct acpi_table_header
*table
)
632 struct acpi_table_hpet
*hpet_tbl
;
634 hpet_tbl
= (struct acpi_table_hpet
*)table
;
636 printk(KERN_WARNING PREFIX
"Unable to map HPET\n");
640 if (hpet_tbl
->address
.space_id
!= ACPI_SPACE_MEM
) {
641 printk(KERN_WARNING PREFIX
"HPET timers must be located in "
646 hpet_address
= hpet_tbl
->address
.address
;
649 * Some broken BIOSes advertise HPET at 0x0. We really do not
650 * want to allocate a resource there.
653 printk(KERN_WARNING PREFIX
654 "HPET id: %#x base: %#lx is invalid\n",
655 hpet_tbl
->id
, hpet_address
);
660 * Some even more broken BIOSes advertise HPET at
661 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
664 if (hpet_address
== 0xfed0000000000000UL
) {
665 if (!hpet_force_user
) {
666 printk(KERN_WARNING PREFIX
"HPET id: %#x "
667 "base: 0xfed0000000000000 is bogus\n "
668 "try hpet=force on the kernel command line to "
669 "fix it up to 0xfed00000.\n", hpet_tbl
->id
);
673 printk(KERN_WARNING PREFIX
674 "HPET id: %#x base: 0xfed0000000000000 fixed up "
675 "to 0xfed00000.\n", hpet_tbl
->id
);
679 printk(KERN_INFO PREFIX
"HPET id: %#x base: %#lx\n",
680 hpet_tbl
->id
, hpet_address
);
683 * Allocate and initialize the HPET firmware resource for adding into
684 * the resource tree during the lateinit timeframe.
686 #define HPET_RESOURCE_NAME_SIZE 9
687 hpet_res
= alloc_bootmem(sizeof(*hpet_res
) + HPET_RESOURCE_NAME_SIZE
);
692 memset(hpet_res
, 0, sizeof(*hpet_res
));
693 hpet_res
->name
= (void *)&hpet_res
[1];
694 hpet_res
->flags
= IORESOURCE_MEM
;
695 snprintf((char *)hpet_res
->name
, HPET_RESOURCE_NAME_SIZE
, "HPET %u",
698 hpet_res
->start
= hpet_address
;
699 hpet_res
->end
= hpet_address
+ (1 * 1024) - 1;
705 * hpet_insert_resource inserts the HPET resources used into the resource
708 static __init
int hpet_insert_resource(void)
713 return insert_resource(&iomem_resource
, hpet_res
);
716 late_initcall(hpet_insert_resource
);
719 #define acpi_parse_hpet NULL
722 static int __init
acpi_parse_fadt(struct acpi_table_header
*table
)
725 #ifdef CONFIG_X86_PM_TIMER
726 /* detect the location of the ACPI PM Timer */
727 if (acpi_gbl_FADT
.header
.revision
>= FADT2_REVISION_ID
) {
729 if (acpi_gbl_FADT
.xpm_timer_block
.space_id
!=
730 ACPI_ADR_SPACE_SYSTEM_IO
)
733 pmtmr_ioport
= acpi_gbl_FADT
.xpm_timer_block
.address
;
735 * "X" fields are optional extensions to the original V1.0
736 * fields, so we must selectively expand V1.0 fields if the
737 * corresponding X field is zero.
740 pmtmr_ioport
= acpi_gbl_FADT
.pm_timer_block
;
743 pmtmr_ioport
= acpi_gbl_FADT
.pm_timer_block
;
746 printk(KERN_INFO PREFIX
"PM-Timer IO Port: %#x\n",
752 #ifdef CONFIG_X86_LOCAL_APIC
754 * Parse LAPIC entries in MADT
755 * returns 0 on success, < 0 on error
757 static int __init
acpi_parse_madt_lapic_entries(void)
765 * Note that the LAPIC address is obtained from the MADT (32-bit value)
766 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
770 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE
,
771 acpi_parse_lapic_addr_ovr
, 0);
773 printk(KERN_ERR PREFIX
774 "Error parsing LAPIC address override entry\n");
778 mp_register_lapic_address(acpi_lapic_addr
);
780 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC
,
781 acpi_parse_sapic
, MAX_APICS
);
784 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC
,
785 acpi_parse_lapic
, MAX_APICS
);
787 printk(KERN_ERR PREFIX
"No LAPIC entries present\n");
788 /* TBD: Cleanup to allow fallback to MPS */
790 } else if (count
< 0) {
791 printk(KERN_ERR PREFIX
"Error parsing LAPIC entry\n");
792 /* TBD: Cleanup to allow fallback to MPS */
797 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI
, acpi_parse_lapic_nmi
, 0);
799 printk(KERN_ERR PREFIX
"Error parsing LAPIC NMI entry\n");
800 /* TBD: Cleanup to allow fallback to MPS */
805 #endif /* CONFIG_X86_LOCAL_APIC */
807 #ifdef CONFIG_X86_IO_APIC
809 * Parse IOAPIC related entries in MADT
810 * returns 0 on success, < 0 on error
812 static int __init
acpi_parse_madt_ioapic_entries(void)
817 * ACPI interpreter is required to complete interrupt setup,
818 * so if it is off, don't enumerate the io-apics with ACPI.
819 * If MPS is present, it will handle them,
820 * otherwise the system will stay in PIC mode
822 if (acpi_disabled
|| acpi_noirq
) {
830 * if "noapic" boot option, don't look for IO-APICs
832 if (skip_ioapic_setup
) {
833 printk(KERN_INFO PREFIX
"Skipping IOAPIC probe "
834 "due to 'noapic' option.\n");
839 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC
, acpi_parse_ioapic
,
842 printk(KERN_ERR PREFIX
"No IOAPIC entries present\n");
844 } else if (count
< 0) {
845 printk(KERN_ERR PREFIX
"Error parsing IOAPIC entry\n");
850 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE
, acpi_parse_int_src_ovr
,
853 printk(KERN_ERR PREFIX
854 "Error parsing interrupt source overrides entry\n");
855 /* TBD: Cleanup to allow fallback to MPS */
860 * If BIOS did not supply an INT_SRC_OVR for the SCI
861 * pretend we got one so we can set the SCI flags.
863 if (!acpi_sci_override_gsi
)
864 acpi_sci_ioapic_setup(acpi_gbl_FADT
.sci_interrupt
, 0, 0);
866 /* Fill in identity legacy mapings where no override */
867 mp_config_acpi_legacy_irqs();
870 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE
, acpi_parse_nmi_src
,
873 printk(KERN_ERR PREFIX
"Error parsing NMI SRC entry\n");
874 /* TBD: Cleanup to allow fallback to MPS */
881 static inline int acpi_parse_madt_ioapic_entries(void)
885 #endif /* !CONFIG_X86_IO_APIC */
887 static void __init
acpi_process_madt(void)
889 #ifdef CONFIG_X86_LOCAL_APIC
892 if (!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 setup_apic_routing();
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(const struct dmi_system_id
*d
)
935 printk(KERN_NOTICE
"%s detected: force use of acpi=noirq\n",
942 static int __init
disable_acpi_pci(const struct dmi_system_id
*d
)
945 printk(KERN_NOTICE
"%s detected: force use of pci=noacpi\n",
952 static int __init
dmi_disable_acpi(const 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(const 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
= "HP VISUALIZE NT Workstation",
1013 DMI_MATCH(DMI_BOARD_VENDOR
, "Hewlett-Packard"),
1014 DMI_MATCH(DMI_PRODUCT_NAME
, "HP VISUALIZE NT Workstation"),
1018 .callback
= force_acpi_ht
,
1019 .ident
= "Compaq Workstation W8000",
1021 DMI_MATCH(DMI_SYS_VENDOR
, "Compaq"),
1022 DMI_MATCH(DMI_PRODUCT_NAME
, "Workstation W8000"),
1026 .callback
= force_acpi_ht
,
1027 .ident
= "ASUS P4B266",
1029 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1030 DMI_MATCH(DMI_BOARD_NAME
, "P4B266"),
1034 .callback
= force_acpi_ht
,
1035 .ident
= "ASUS P2B-DS",
1037 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1038 DMI_MATCH(DMI_BOARD_NAME
, "P2B-DS"),
1042 .callback
= force_acpi_ht
,
1043 .ident
= "ASUS CUR-DLS",
1045 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1046 DMI_MATCH(DMI_BOARD_NAME
, "CUR-DLS"),
1050 .callback
= force_acpi_ht
,
1051 .ident
= "ABIT i440BX-W83977",
1053 DMI_MATCH(DMI_BOARD_VENDOR
, "ABIT <http://www.abit.com>"),
1054 DMI_MATCH(DMI_BOARD_NAME
, "i440BX-W83977 (BP6)"),
1058 .callback
= force_acpi_ht
,
1059 .ident
= "IBM Bladecenter",
1061 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1062 DMI_MATCH(DMI_BOARD_NAME
, "IBM eServer BladeCenter HS20"),
1066 .callback
= force_acpi_ht
,
1067 .ident
= "IBM eServer xSeries 360",
1069 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1070 DMI_MATCH(DMI_BOARD_NAME
, "eServer xSeries 360"),
1074 .callback
= force_acpi_ht
,
1075 .ident
= "IBM eserver xSeries 330",
1077 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1078 DMI_MATCH(DMI_BOARD_NAME
, "eserver xSeries 330"),
1082 .callback
= force_acpi_ht
,
1083 .ident
= "IBM eserver xSeries 440",
1085 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1086 DMI_MATCH(DMI_PRODUCT_NAME
, "eserver xSeries 440"),
1091 * Boxes that need ACPI PCI IRQ routing disabled
1094 .callback
= disable_acpi_irq
,
1095 .ident
= "ASUS A7V",
1097 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC"),
1098 DMI_MATCH(DMI_BOARD_NAME
, "<A7V>"),
1099 /* newer BIOS, Revision 1011, does work */
1100 DMI_MATCH(DMI_BIOS_VERSION
,
1101 "ASUS A7V ACPI BIOS Revision 1007"),
1106 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1107 * for LPC bridge, which is needed for the PCI
1108 * interrupt links to work. DSDT fix is in bug 5966.
1109 * 2645, 2646 model numbers are shared with 600/600E/600X
1111 .callback
= disable_acpi_irq
,
1112 .ident
= "IBM Thinkpad 600 Series 2645",
1114 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1115 DMI_MATCH(DMI_BOARD_NAME
, "2645"),
1119 .callback
= disable_acpi_irq
,
1120 .ident
= "IBM Thinkpad 600 Series 2646",
1122 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1123 DMI_MATCH(DMI_BOARD_NAME
, "2646"),
1127 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1130 .callback
= disable_acpi_pci
,
1131 .ident
= "ASUS PR-DLS",
1133 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1134 DMI_MATCH(DMI_BOARD_NAME
, "PR-DLS"),
1135 DMI_MATCH(DMI_BIOS_VERSION
,
1136 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1137 DMI_MATCH(DMI_BIOS_DATE
, "03/21/2003")
1141 .callback
= disable_acpi_pci
,
1142 .ident
= "Acer TravelMate 36x Laptop",
1144 DMI_MATCH(DMI_SYS_VENDOR
, "Acer"),
1145 DMI_MATCH(DMI_PRODUCT_NAME
, "TravelMate 360"),
1151 #endif /* __i386__ */
1154 * acpi_boot_table_init() and acpi_boot_init()
1155 * called from setup_arch(), always.
1156 * 1. checksums all tables
1157 * 2. enumerates lapics
1158 * 3. enumerates io-apics
1160 * acpi_table_init() is separate to allow reading SRAT without
1161 * other side effects.
1163 * side effects of acpi_boot_init:
1164 * acpi_lapic = 1 if LAPIC found
1165 * acpi_ioapic = 1 if IOAPIC found
1166 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1167 * if acpi_blacklisted() acpi_disabled = 1;
1168 * acpi_irq_model=...
1171 * return value: (currently ignored)
1176 int __init
acpi_boot_table_init(void)
1181 dmi_check_system(acpi_dmi_table
);
1185 * If acpi_disabled, bail out
1186 * One exception: acpi=ht continues far enough to enumerate LAPICs
1188 if (acpi_disabled
&& !acpi_ht
)
1192 * Initialize the ACPI boot-time table parser.
1194 error
= acpi_table_init();
1200 acpi_table_parse(ACPI_SIG_BOOT
, acpi_parse_sbf
);
1203 * blacklist may disable ACPI entirely
1205 error
= acpi_blacklisted();
1208 printk(KERN_WARNING PREFIX
"acpi=force override\n");
1210 printk(KERN_WARNING PREFIX
"Disabling ACPI support\n");
1219 int __init
acpi_boot_init(void)
1222 * If acpi_disabled, bail out
1223 * One exception: acpi=ht continues far enough to enumerate LAPICs
1225 if (acpi_disabled
&& !acpi_ht
)
1228 acpi_table_parse(ACPI_SIG_BOOT
, acpi_parse_sbf
);
1231 * set sci_int and PM timer address
1233 acpi_table_parse(ACPI_SIG_FADT
, acpi_parse_fadt
);
1236 * Process the Multiple APIC Description Table (MADT), if present
1238 acpi_process_madt();
1240 acpi_table_parse(ACPI_SIG_HPET
, acpi_parse_hpet
);
1245 static int __init
parse_acpi(char *arg
)
1250 /* "acpi=off" disables both ACPI table parsing and interpreter */
1251 if (strcmp(arg
, "off") == 0) {
1254 /* acpi=force to over-ride black-list */
1255 else if (strcmp(arg
, "force") == 0) {
1260 /* acpi=strict disables out-of-spec workarounds */
1261 else if (strcmp(arg
, "strict") == 0) {
1264 /* Limit ACPI just to boot-time to enable HT */
1265 else if (strcmp(arg
, "ht") == 0) {
1270 /* "acpi=noirq" disables ACPI interrupt routing */
1271 else if (strcmp(arg
, "noirq") == 0) {
1274 /* Core will printk when we return error. */
1279 early_param("acpi", parse_acpi
);
1281 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1282 static int __init
parse_pci(char *arg
)
1284 if (arg
&& strcmp(arg
, "noacpi") == 0)
1288 early_param("pci", parse_pci
);
1290 #ifdef CONFIG_X86_IO_APIC
1291 static int __init
parse_acpi_skip_timer_override(char *arg
)
1293 acpi_skip_timer_override
= 1;
1296 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override
);
1298 static int __init
parse_acpi_use_timer_override(char *arg
)
1300 acpi_use_timer_override
= 1;
1303 early_param("acpi_use_timer_override", parse_acpi_use_timer_override
);
1304 #endif /* CONFIG_X86_IO_APIC */
1306 static int __init
setup_acpi_sci(char *s
)
1310 if (!strcmp(s
, "edge"))
1311 acpi_sci_flags
= ACPI_MADT_TRIGGER_EDGE
|
1312 (acpi_sci_flags
& ~ACPI_MADT_TRIGGER_MASK
);
1313 else if (!strcmp(s
, "level"))
1314 acpi_sci_flags
= ACPI_MADT_TRIGGER_LEVEL
|
1315 (acpi_sci_flags
& ~ACPI_MADT_TRIGGER_MASK
);
1316 else if (!strcmp(s
, "high"))
1317 acpi_sci_flags
= ACPI_MADT_POLARITY_ACTIVE_HIGH
|
1318 (acpi_sci_flags
& ~ACPI_MADT_POLARITY_MASK
);
1319 else if (!strcmp(s
, "low"))
1320 acpi_sci_flags
= ACPI_MADT_POLARITY_ACTIVE_LOW
|
1321 (acpi_sci_flags
& ~ACPI_MADT_POLARITY_MASK
);
1326 early_param("acpi_sci", setup_acpi_sci
);
1328 int __acpi_acquire_global_lock(unsigned int *lock
)
1330 unsigned int old
, new, val
;
1333 new = (((old
& ~0x3) + 2) + ((old
>> 1) & 0x1));
1334 val
= cmpxchg(lock
, old
, new);
1335 } while (unlikely (val
!= old
));
1336 return (new < 3) ? -1 : 0;
1339 int __acpi_release_global_lock(unsigned int *lock
)
1341 unsigned int old
, new, val
;
1345 val
= cmpxchg(lock
, old
, new);
1346 } while (unlikely (val
!= old
));