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>
40 #include <asm/genapic.h>
42 #include <asm/mpspec.h>
45 #ifdef CONFIG_X86_LOCAL_APIC
46 # include <mach_apic.h>
49 static int __initdata acpi_force
= 0;
52 int acpi_disabled
= 0;
54 int acpi_disabled
= 1;
56 EXPORT_SYMBOL(acpi_disabled
);
60 #include <asm/proto.h>
64 #ifdef CONFIG_X86_LOCAL_APIC
65 #include <mach_apic.h>
66 #include <mach_mpparse.h>
67 #endif /* CONFIG_X86_LOCAL_APIC */
71 #define BAD_MADT_ENTRY(entry, end) ( \
72 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
73 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
75 #define PREFIX "ACPI: "
77 int acpi_noirq
; /* skip ACPI IRQ initialization */
78 int acpi_pci_disabled
; /* skip ACPI PCI scan and IRQ initialization */
79 EXPORT_SYMBOL(acpi_pci_disabled
);
80 int acpi_ht __initdata
= 1; /* enable HT */
86 u8 acpi_sci_flags __initdata
;
87 int acpi_sci_override_gsi __initdata
;
88 int acpi_skip_timer_override __initdata
;
89 int acpi_use_timer_override __initdata
;
91 #ifdef CONFIG_X86_LOCAL_APIC
92 static u64 acpi_lapic_addr __initdata
= APIC_DEFAULT_PHYS_BASE
;
95 #ifndef __HAVE_ARCH_CMPXCHG
96 #warning ACPI uses CMPXCHG, i486 and later hardware
99 /* --------------------------------------------------------------------------
100 Boot-time Configuration
101 -------------------------------------------------------------------------- */
104 * The default interrupt routing model is PIC (8259). This gets
105 * overridden if IOAPICs are enumerated (below).
107 enum acpi_irq_model_id acpi_irq_model
= ACPI_IRQ_MODEL_PIC
;
111 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
112 * to map the target physical address. The problem is that set_fixmap()
113 * provides a single page, and it is possible that the page is not
115 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
116 * i.e. until the next __va_range() call.
118 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
119 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
120 * count idx down while incrementing the phys address.
122 char *__init
__acpi_map_table(unsigned long phys
, unsigned long size
)
124 unsigned long base
, offset
, mapped_size
;
130 if (phys
+size
<= (max_low_pfn_mapped
<< PAGE_SHIFT
))
133 offset
= phys
& (PAGE_SIZE
- 1);
134 mapped_size
= PAGE_SIZE
- offset
;
135 clear_fixmap(FIX_ACPI_END
);
136 set_fixmap(FIX_ACPI_END
, phys
);
137 base
= fix_to_virt(FIX_ACPI_END
);
140 * Most cases can be covered by the below.
143 while (mapped_size
< size
) {
144 if (--idx
< FIX_ACPI_BEGIN
)
145 return NULL
; /* cannot handle this */
148 set_fixmap(idx
, phys
);
149 mapped_size
+= PAGE_SIZE
;
152 return ((unsigned char *)base
+ offset
);
155 #ifdef CONFIG_PCI_MMCONFIG
157 static int acpi_mcfg_64bit_base_addr __initdata
= FALSE
;
159 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
160 struct acpi_mcfg_allocation
*pci_mmcfg_config
;
161 int pci_mmcfg_config_num
;
163 static int __init
acpi_mcfg_oem_check(struct acpi_table_mcfg
*mcfg
)
165 if (!strcmp(mcfg
->header
.oem_id
, "SGI"))
166 acpi_mcfg_64bit_base_addr
= TRUE
;
171 int __init
acpi_parse_mcfg(struct acpi_table_header
*header
)
173 struct acpi_table_mcfg
*mcfg
;
180 mcfg
= (struct acpi_table_mcfg
*)header
;
182 /* how many config structures do we have */
183 pci_mmcfg_config_num
= 0;
184 i
= header
->length
- sizeof(struct acpi_table_mcfg
);
185 while (i
>= sizeof(struct acpi_mcfg_allocation
)) {
186 ++pci_mmcfg_config_num
;
187 i
-= sizeof(struct acpi_mcfg_allocation
);
189 if (pci_mmcfg_config_num
== 0) {
190 printk(KERN_ERR PREFIX
"MMCONFIG has no entries\n");
194 config_size
= pci_mmcfg_config_num
* sizeof(*pci_mmcfg_config
);
195 pci_mmcfg_config
= kmalloc(config_size
, GFP_KERNEL
);
196 if (!pci_mmcfg_config
) {
197 printk(KERN_WARNING PREFIX
198 "No memory for MCFG config tables\n");
202 memcpy(pci_mmcfg_config
, &mcfg
[1], config_size
);
204 acpi_mcfg_oem_check(mcfg
);
206 for (i
= 0; i
< pci_mmcfg_config_num
; ++i
) {
207 if ((pci_mmcfg_config
[i
].address
> 0xFFFFFFFF) &&
208 !acpi_mcfg_64bit_base_addr
) {
209 printk(KERN_ERR PREFIX
210 "MMCONFIG not in low 4GB of memory\n");
211 kfree(pci_mmcfg_config
);
212 pci_mmcfg_config_num
= 0;
219 #endif /* CONFIG_PCI_MMCONFIG */
221 #ifdef CONFIG_X86_LOCAL_APIC
222 static int __init
acpi_parse_madt(struct acpi_table_header
*table
)
224 struct acpi_table_madt
*madt
= NULL
;
229 madt
= (struct acpi_table_madt
*)table
;
231 printk(KERN_WARNING PREFIX
"Unable to map MADT\n");
236 acpi_lapic_addr
= (u64
) madt
->address
;
238 printk(KERN_DEBUG PREFIX
"Local APIC address 0x%08x\n",
242 acpi_madt_oem_check(madt
->header
.oem_id
, madt
->header
.oem_table_id
);
247 static void __cpuinit
acpi_register_lapic(int id
, u8 enabled
)
249 unsigned int ver
= 0;
256 if (boot_cpu_physical_apicid
!= -1U)
257 ver
= apic_version
[boot_cpu_physical_apicid
];
259 generic_processor_info(id
, ver
);
263 acpi_parse_lapic(struct acpi_subtable_header
* header
, const unsigned long end
)
265 struct acpi_madt_local_apic
*processor
= NULL
;
267 processor
= (struct acpi_madt_local_apic
*)header
;
269 if (BAD_MADT_ENTRY(processor
, end
))
272 acpi_table_print_madt_entry(header
);
275 * We need to register disabled CPU as well to permit
276 * counting disabled CPUs. This allows us to size
277 * cpus_possible_map more accurately, to permit
278 * to not preallocating memory for all NR_CPUS
279 * when we use CPU hotplug.
281 acpi_register_lapic(processor
->id
, /* APIC ID */
282 processor
->lapic_flags
& ACPI_MADT_ENABLED
);
288 acpi_parse_sapic(struct acpi_subtable_header
*header
, const unsigned long end
)
290 struct acpi_madt_local_sapic
*processor
= NULL
;
292 processor
= (struct acpi_madt_local_sapic
*)header
;
294 if (BAD_MADT_ENTRY(processor
, end
))
297 acpi_table_print_madt_entry(header
);
299 acpi_register_lapic((processor
->id
<< 8) | processor
->eid
,/* APIC ID */
300 processor
->lapic_flags
& ACPI_MADT_ENABLED
);
306 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header
* header
,
307 const unsigned long end
)
309 struct acpi_madt_local_apic_override
*lapic_addr_ovr
= NULL
;
311 lapic_addr_ovr
= (struct acpi_madt_local_apic_override
*)header
;
313 if (BAD_MADT_ENTRY(lapic_addr_ovr
, end
))
316 acpi_lapic_addr
= lapic_addr_ovr
->address
;
322 acpi_parse_lapic_nmi(struct acpi_subtable_header
* header
, const unsigned long end
)
324 struct acpi_madt_local_apic_nmi
*lapic_nmi
= NULL
;
326 lapic_nmi
= (struct acpi_madt_local_apic_nmi
*)header
;
328 if (BAD_MADT_ENTRY(lapic_nmi
, end
))
331 acpi_table_print_madt_entry(header
);
333 if (lapic_nmi
->lint
!= 1)
334 printk(KERN_WARNING PREFIX
"NMI not connected to LINT 1!\n");
339 #endif /*CONFIG_X86_LOCAL_APIC */
341 #ifdef CONFIG_X86_IO_APIC
344 acpi_parse_ioapic(struct acpi_subtable_header
* header
, const unsigned long end
)
346 struct acpi_madt_io_apic
*ioapic
= NULL
;
348 ioapic
= (struct acpi_madt_io_apic
*)header
;
350 if (BAD_MADT_ENTRY(ioapic
, end
))
353 acpi_table_print_madt_entry(header
);
355 mp_register_ioapic(ioapic
->id
,
356 ioapic
->address
, ioapic
->global_irq_base
);
362 * Parse Interrupt Source Override for the ACPI SCI
364 static void __init
acpi_sci_ioapic_setup(u32 gsi
, u16 polarity
, u16 trigger
)
366 if (trigger
== 0) /* compatible SCI trigger is level */
369 if (polarity
== 0) /* compatible SCI polarity is low */
372 /* Command-line over-ride via acpi_sci= */
373 if (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
)
374 trigger
= (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2;
376 if (acpi_sci_flags
& ACPI_MADT_POLARITY_MASK
)
377 polarity
= acpi_sci_flags
& ACPI_MADT_POLARITY_MASK
;
380 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
381 * If GSI is < 16, this will update its flags,
382 * else it will create a new mp_irqs[] entry.
384 mp_override_legacy_irq(gsi
, polarity
, trigger
, gsi
);
387 * stash over-ride to indicate we've been here
388 * and for later update of acpi_gbl_FADT
390 acpi_sci_override_gsi
= gsi
;
395 acpi_parse_int_src_ovr(struct acpi_subtable_header
* header
,
396 const unsigned long end
)
398 struct acpi_madt_interrupt_override
*intsrc
= NULL
;
400 intsrc
= (struct acpi_madt_interrupt_override
*)header
;
402 if (BAD_MADT_ENTRY(intsrc
, end
))
405 acpi_table_print_madt_entry(header
);
407 if (intsrc
->source_irq
== acpi_gbl_FADT
.sci_interrupt
) {
408 acpi_sci_ioapic_setup(intsrc
->global_irq
,
409 intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
,
410 (intsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2);
414 if (acpi_skip_timer_override
&&
415 intsrc
->source_irq
== 0 && intsrc
->global_irq
== 2) {
416 printk(PREFIX
"BIOS IRQ0 pin2 override ignored.\n");
420 mp_override_legacy_irq(intsrc
->source_irq
,
421 intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
,
422 (intsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2,
429 acpi_parse_nmi_src(struct acpi_subtable_header
* header
, const unsigned long end
)
431 struct acpi_madt_nmi_source
*nmi_src
= NULL
;
433 nmi_src
= (struct acpi_madt_nmi_source
*)header
;
435 if (BAD_MADT_ENTRY(nmi_src
, end
))
438 acpi_table_print_madt_entry(header
);
440 /* TBD: Support nimsrc entries? */
445 #endif /* CONFIG_X86_IO_APIC */
448 * acpi_pic_sci_set_trigger()
450 * use ELCR to set PIC-mode trigger type for SCI
452 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
453 * it may require Edge Trigger -- use "acpi_sci=edge"
455 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
456 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
457 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
458 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
461 void __init
acpi_pic_sci_set_trigger(unsigned int irq
, u16 trigger
)
463 unsigned int mask
= 1 << irq
;
464 unsigned int old
, new;
466 /* Real old ELCR mask */
467 old
= inb(0x4d0) | (inb(0x4d1) << 8);
470 * If we use ACPI to set PCI IRQs, then we should clear ELCR
471 * since we will set it correctly as we enable the PCI irq
474 new = acpi_noirq
? old
: 0;
477 * Update SCI information in the ELCR, it isn't in the PCI
481 case 1: /* Edge - clear */
484 case 3: /* Level - set */
492 printk(PREFIX
"setting ELCR to %04x (from %04x)\n", new, old
);
494 outb(new >> 8, 0x4d1);
497 int acpi_gsi_to_irq(u32 gsi
, unsigned int *irq
)
504 * success: return IRQ number (>=0)
505 * failure: return < 0
507 int acpi_register_gsi(u32 gsi
, int triggering
, int polarity
)
510 unsigned int plat_gsi
= gsi
;
514 * Make sure all (legacy) PCI IRQs are set as level-triggered.
516 if (acpi_irq_model
== ACPI_IRQ_MODEL_PIC
) {
517 if (triggering
== ACPI_LEVEL_SENSITIVE
)
518 eisa_set_level_irq(gsi
);
522 #ifdef CONFIG_X86_IO_APIC
523 if (acpi_irq_model
== ACPI_IRQ_MODEL_IOAPIC
) {
524 plat_gsi
= mp_register_gsi(gsi
, triggering
, polarity
);
527 acpi_gsi_to_irq(plat_gsi
, &irq
);
532 * ACPI based hotplug support for CPU
534 #ifdef CONFIG_ACPI_HOTPLUG_CPU
536 static int __cpuinit
_acpi_map_lsapic(acpi_handle handle
, int *pcpu
)
538 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
539 union acpi_object
*obj
;
540 struct acpi_madt_local_apic
*lapic
;
541 cpumask_var_t tmp_map
, new_map
;
544 int retval
= -ENOMEM
;
546 if (ACPI_FAILURE(acpi_evaluate_object(handle
, "_MAT", NULL
, &buffer
)))
549 if (!buffer
.length
|| !buffer
.pointer
)
552 obj
= buffer
.pointer
;
553 if (obj
->type
!= ACPI_TYPE_BUFFER
||
554 obj
->buffer
.length
< sizeof(*lapic
)) {
555 kfree(buffer
.pointer
);
559 lapic
= (struct acpi_madt_local_apic
*)obj
->buffer
.pointer
;
561 if (lapic
->header
.type
!= ACPI_MADT_TYPE_LOCAL_APIC
||
562 !(lapic
->lapic_flags
& ACPI_MADT_ENABLED
)) {
563 kfree(buffer
.pointer
);
569 kfree(buffer
.pointer
);
570 buffer
.length
= ACPI_ALLOCATE_BUFFER
;
571 buffer
.pointer
= NULL
;
573 if (!alloc_cpumask_var(&tmp_map
, GFP_KERNEL
))
576 if (!alloc_cpumask_var(&new_map
, GFP_KERNEL
))
579 cpumask_copy(tmp_map
, cpu_present_mask
);
580 acpi_register_lapic(physid
, lapic
->lapic_flags
& ACPI_MADT_ENABLED
);
583 * If mp_register_lapic successfully generates a new logical cpu
584 * number, then the following will get us exactly what was mapped
586 cpumask_andnot(new_map
, cpu_present_mask
, tmp_map
);
587 if (cpumask_empty(new_map
)) {
588 printk ("Unable to map lapic to logical cpu number\n");
593 cpu
= cpumask_first(new_map
);
599 free_cpumask_var(new_map
);
601 free_cpumask_var(tmp_map
);
606 /* wrapper to silence section mismatch warning */
607 int __ref
acpi_map_lsapic(acpi_handle handle
, int *pcpu
)
609 return _acpi_map_lsapic(handle
, pcpu
);
611 EXPORT_SYMBOL(acpi_map_lsapic
);
613 int acpi_unmap_lsapic(int cpu
)
615 per_cpu(x86_cpu_to_apicid
, cpu
) = -1;
616 set_cpu_present(cpu
, false);
622 EXPORT_SYMBOL(acpi_unmap_lsapic
);
623 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
625 int acpi_register_ioapic(acpi_handle handle
, u64 phys_addr
, u32 gsi_base
)
631 EXPORT_SYMBOL(acpi_register_ioapic
);
633 int acpi_unregister_ioapic(acpi_handle handle
, u32 gsi_base
)
639 EXPORT_SYMBOL(acpi_unregister_ioapic
);
641 static int __init
acpi_parse_sbf(struct acpi_table_header
*table
)
643 struct acpi_table_boot
*sb
;
645 sb
= (struct acpi_table_boot
*)table
;
647 printk(KERN_WARNING PREFIX
"Unable to map SBF\n");
651 sbf_port
= sb
->cmos_index
; /* Save CMOS port */
656 #ifdef CONFIG_HPET_TIMER
657 #include <asm/hpet.h>
659 static struct __initdata resource
*hpet_res
;
661 static int __init
acpi_parse_hpet(struct acpi_table_header
*table
)
663 struct acpi_table_hpet
*hpet_tbl
;
665 hpet_tbl
= (struct acpi_table_hpet
*)table
;
667 printk(KERN_WARNING PREFIX
"Unable to map HPET\n");
671 if (hpet_tbl
->address
.space_id
!= ACPI_SPACE_MEM
) {
672 printk(KERN_WARNING PREFIX
"HPET timers must be located in "
677 hpet_address
= hpet_tbl
->address
.address
;
680 * Some broken BIOSes advertise HPET at 0x0. We really do not
681 * want to allocate a resource there.
684 printk(KERN_WARNING PREFIX
685 "HPET id: %#x base: %#lx is invalid\n",
686 hpet_tbl
->id
, hpet_address
);
691 * Some even more broken BIOSes advertise HPET at
692 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
695 if (hpet_address
== 0xfed0000000000000UL
) {
696 if (!hpet_force_user
) {
697 printk(KERN_WARNING PREFIX
"HPET id: %#x "
698 "base: 0xfed0000000000000 is bogus\n "
699 "try hpet=force on the kernel command line to "
700 "fix it up to 0xfed00000.\n", hpet_tbl
->id
);
704 printk(KERN_WARNING PREFIX
705 "HPET id: %#x base: 0xfed0000000000000 fixed up "
706 "to 0xfed00000.\n", hpet_tbl
->id
);
710 printk(KERN_INFO PREFIX
"HPET id: %#x base: %#lx\n",
711 hpet_tbl
->id
, hpet_address
);
714 * Allocate and initialize the HPET firmware resource for adding into
715 * the resource tree during the lateinit timeframe.
717 #define HPET_RESOURCE_NAME_SIZE 9
718 hpet_res
= alloc_bootmem(sizeof(*hpet_res
) + HPET_RESOURCE_NAME_SIZE
);
720 hpet_res
->name
= (void *)&hpet_res
[1];
721 hpet_res
->flags
= IORESOURCE_MEM
;
722 snprintf((char *)hpet_res
->name
, HPET_RESOURCE_NAME_SIZE
, "HPET %u",
725 hpet_res
->start
= hpet_address
;
726 hpet_res
->end
= hpet_address
+ (1 * 1024) - 1;
732 * hpet_insert_resource inserts the HPET resources used into the resource
735 static __init
int hpet_insert_resource(void)
740 return insert_resource(&iomem_resource
, hpet_res
);
743 late_initcall(hpet_insert_resource
);
746 #define acpi_parse_hpet NULL
749 static int __init
acpi_parse_fadt(struct acpi_table_header
*table
)
752 #ifdef CONFIG_X86_PM_TIMER
753 /* detect the location of the ACPI PM Timer */
754 if (acpi_gbl_FADT
.header
.revision
>= FADT2_REVISION_ID
) {
756 if (acpi_gbl_FADT
.xpm_timer_block
.space_id
!=
757 ACPI_ADR_SPACE_SYSTEM_IO
)
760 pmtmr_ioport
= acpi_gbl_FADT
.xpm_timer_block
.address
;
762 * "X" fields are optional extensions to the original V1.0
763 * fields, so we must selectively expand V1.0 fields if the
764 * corresponding X field is zero.
767 pmtmr_ioport
= acpi_gbl_FADT
.pm_timer_block
;
770 pmtmr_ioport
= acpi_gbl_FADT
.pm_timer_block
;
773 printk(KERN_INFO PREFIX
"PM-Timer IO Port: %#x\n",
779 #ifdef CONFIG_X86_LOCAL_APIC
781 * Parse LAPIC entries in MADT
782 * returns 0 on success, < 0 on error
785 static void __init
acpi_register_lapic_address(unsigned long address
)
787 mp_lapic_addr
= address
;
789 set_fixmap_nocache(FIX_APIC_BASE
, address
);
790 if (boot_cpu_physical_apicid
== -1U) {
791 boot_cpu_physical_apicid
= read_apic_id();
792 apic_version
[boot_cpu_physical_apicid
] =
793 GET_APIC_VERSION(apic_read(APIC_LVR
));
797 static int __init
early_acpi_parse_madt_lapic_addr_ovr(void)
805 * Note that the LAPIC address is obtained from the MADT (32-bit value)
806 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
810 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE
,
811 acpi_parse_lapic_addr_ovr
, 0);
813 printk(KERN_ERR PREFIX
814 "Error parsing LAPIC address override entry\n");
818 acpi_register_lapic_address(acpi_lapic_addr
);
823 static int __init
acpi_parse_madt_lapic_entries(void)
831 * Note that the LAPIC address is obtained from the MADT (32-bit value)
832 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
836 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE
,
837 acpi_parse_lapic_addr_ovr
, 0);
839 printk(KERN_ERR PREFIX
840 "Error parsing LAPIC address override entry\n");
844 acpi_register_lapic_address(acpi_lapic_addr
);
846 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC
,
847 acpi_parse_sapic
, MAX_APICS
);
850 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC
,
851 acpi_parse_lapic
, MAX_APICS
);
853 printk(KERN_ERR PREFIX
"No LAPIC entries present\n");
854 /* TBD: Cleanup to allow fallback to MPS */
856 } else if (count
< 0) {
857 printk(KERN_ERR PREFIX
"Error parsing LAPIC entry\n");
858 /* TBD: Cleanup to allow fallback to MPS */
863 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI
, acpi_parse_lapic_nmi
, 0);
865 printk(KERN_ERR PREFIX
"Error parsing LAPIC NMI entry\n");
866 /* TBD: Cleanup to allow fallback to MPS */
871 #endif /* CONFIG_X86_LOCAL_APIC */
873 #ifdef CONFIG_X86_IO_APIC
876 #ifdef CONFIG_X86_ES7000
877 extern int es7000_plat
;
884 DECLARE_BITMAP(pin_programmed
, MP_MAX_IOAPIC_PIN
+ 1);
885 } mp_ioapic_routing
[MAX_IO_APICS
];
887 static int mp_find_ioapic(int gsi
)
891 /* Find the IOAPIC that manages this GSI. */
892 for (i
= 0; i
< nr_ioapics
; i
++) {
893 if ((gsi
>= mp_ioapic_routing
[i
].gsi_base
)
894 && (gsi
<= mp_ioapic_routing
[i
].gsi_end
))
898 printk(KERN_ERR
"ERROR: Unable to locate IOAPIC for GSI %d\n", gsi
);
902 static u8 __init
uniq_ioapic_id(u8 id
)
905 if ((boot_cpu_data
.x86_vendor
== X86_VENDOR_INTEL
) &&
906 !APIC_XAPIC(apic_version
[boot_cpu_physical_apicid
]))
907 return io_apic_get_unique_id(nr_ioapics
, id
);
912 DECLARE_BITMAP(used
, 256);
913 bitmap_zero(used
, 256);
914 for (i
= 0; i
< nr_ioapics
; i
++) {
915 struct mp_config_ioapic
*ia
= &mp_ioapics
[i
];
916 __set_bit(ia
->mp_apicid
, used
);
918 if (!test_bit(id
, used
))
920 return find_first_zero_bit(used
, 256);
924 static int bad_ioapic(unsigned long address
)
926 if (nr_ioapics
>= MAX_IO_APICS
) {
927 printk(KERN_ERR
"ERROR: Max # of I/O APICs (%d) exceeded "
928 "(found %d)\n", MAX_IO_APICS
, nr_ioapics
);
929 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
932 printk(KERN_ERR
"WARNING: Bogus (zero) I/O APIC address"
933 " found in table, skipping!\n");
939 void __init
mp_register_ioapic(int id
, u32 address
, u32 gsi_base
)
943 if (bad_ioapic(address
))
948 mp_ioapics
[idx
].mp_type
= MP_IOAPIC
;
949 mp_ioapics
[idx
].mp_flags
= MPC_APIC_USABLE
;
950 mp_ioapics
[idx
].mp_apicaddr
= address
;
952 set_fixmap_nocache(FIX_IO_APIC_BASE_0
+ idx
, address
);
953 mp_ioapics
[idx
].mp_apicid
= uniq_ioapic_id(id
);
955 mp_ioapics
[idx
].mp_apicver
= io_apic_get_version(idx
);
957 mp_ioapics
[idx
].mp_apicver
= 0;
960 * Build basic GSI lookup table to facilitate gsi->io_apic lookups
961 * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
963 mp_ioapic_routing
[idx
].apic_id
= mp_ioapics
[idx
].mp_apicid
;
964 mp_ioapic_routing
[idx
].gsi_base
= gsi_base
;
965 mp_ioapic_routing
[idx
].gsi_end
= gsi_base
+
966 io_apic_get_redir_entries(idx
);
968 printk(KERN_INFO
"IOAPIC[%d]: apic_id %d, version %d, address 0x%lx, "
969 "GSI %d-%d\n", idx
, mp_ioapics
[idx
].mp_apicid
,
970 mp_ioapics
[idx
].mp_apicver
, mp_ioapics
[idx
].mp_apicaddr
,
971 mp_ioapic_routing
[idx
].gsi_base
, mp_ioapic_routing
[idx
].gsi_end
);
976 int __init
acpi_probe_gsi(void)
989 for (idx
= 0; idx
< nr_ioapics
; idx
++) {
990 gsi
= mp_ioapic_routing
[idx
].gsi_end
;
999 static void assign_to_mp_irq(struct mp_config_intsrc
*m
,
1000 struct mp_config_intsrc
*mp_irq
)
1002 memcpy(mp_irq
, m
, sizeof(struct mp_config_intsrc
));
1005 static int mp_irq_cmp(struct mp_config_intsrc
*mp_irq
,
1006 struct mp_config_intsrc
*m
)
1008 return memcmp(mp_irq
, m
, sizeof(struct mp_config_intsrc
));
1011 static void save_mp_irq(struct mp_config_intsrc
*m
)
1015 for (i
= 0; i
< mp_irq_entries
; i
++) {
1016 if (!mp_irq_cmp(&mp_irqs
[i
], m
))
1020 assign_to_mp_irq(m
, &mp_irqs
[mp_irq_entries
]);
1021 if (++mp_irq_entries
== MAX_IRQ_SOURCES
)
1022 panic("Max # of irq sources exceeded!!\n");
1025 void __init
mp_override_legacy_irq(u8 bus_irq
, u8 polarity
, u8 trigger
, u32 gsi
)
1029 struct mp_config_intsrc mp_irq
;
1032 * Convert 'gsi' to 'ioapic.pin'.
1034 ioapic
= mp_find_ioapic(gsi
);
1037 pin
= gsi
- mp_ioapic_routing
[ioapic
].gsi_base
;
1040 * TBD: This check is for faulty timer entries, where the override
1041 * erroneously sets the trigger to level, resulting in a HUGE
1042 * increase of timer interrupts!
1044 if ((bus_irq
== 0) && (trigger
== 3))
1047 mp_irq
.mp_type
= MP_INTSRC
;
1048 mp_irq
.mp_irqtype
= mp_INT
;
1049 mp_irq
.mp_irqflag
= (trigger
<< 2) | polarity
;
1050 mp_irq
.mp_srcbus
= MP_ISA_BUS
;
1051 mp_irq
.mp_srcbusirq
= bus_irq
; /* IRQ */
1052 mp_irq
.mp_dstapic
= mp_ioapics
[ioapic
].mp_apicid
; /* APIC ID */
1053 mp_irq
.mp_dstirq
= pin
; /* INTIN# */
1055 save_mp_irq(&mp_irq
);
1058 void __init
mp_config_acpi_legacy_irqs(void)
1062 unsigned int dstapic
;
1063 struct mp_config_intsrc mp_irq
;
1065 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
1067 * Fabricate the legacy ISA bus (bus #31).
1069 mp_bus_id_to_type
[MP_ISA_BUS
] = MP_BUS_ISA
;
1071 set_bit(MP_ISA_BUS
, mp_bus_not_pci
);
1072 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS
);
1074 #ifdef CONFIG_X86_ES7000
1076 * Older generations of ES7000 have no legacy identity mappings
1078 if (es7000_plat
== 1)
1083 * Locate the IOAPIC that manages the ISA IRQs (0-15).
1085 ioapic
= mp_find_ioapic(0);
1088 dstapic
= mp_ioapics
[ioapic
].mp_apicid
;
1091 * Use the default configuration for the IRQs 0-15. Unless
1092 * overridden by (MADT) interrupt source override entries.
1094 for (i
= 0; i
< 16; i
++) {
1097 for (idx
= 0; idx
< mp_irq_entries
; idx
++) {
1098 struct mp_config_intsrc
*irq
= mp_irqs
+ idx
;
1100 /* Do we already have a mapping for this ISA IRQ? */
1101 if (irq
->mp_srcbus
== MP_ISA_BUS
1102 && irq
->mp_srcbusirq
== i
)
1105 /* Do we already have a mapping for this IOAPIC pin */
1106 if (irq
->mp_dstapic
== dstapic
&&
1107 irq
->mp_dstirq
== i
)
1111 if (idx
!= mp_irq_entries
) {
1112 printk(KERN_DEBUG
"ACPI: IRQ%d used by override.\n", i
);
1113 continue; /* IRQ already used */
1116 mp_irq
.mp_type
= MP_INTSRC
;
1117 mp_irq
.mp_irqflag
= 0; /* Conforming */
1118 mp_irq
.mp_srcbus
= MP_ISA_BUS
;
1119 mp_irq
.mp_dstapic
= dstapic
;
1120 mp_irq
.mp_irqtype
= mp_INT
;
1121 mp_irq
.mp_srcbusirq
= i
; /* Identity mapped */
1122 mp_irq
.mp_dstirq
= i
;
1124 save_mp_irq(&mp_irq
);
1128 int mp_register_gsi(u32 gsi
, int triggering
, int polarity
)
1132 #ifdef CONFIG_X86_32
1133 #define MAX_GSI_NUM 4096
1134 #define IRQ_COMPRESSION_START 64
1136 static int pci_irq
= IRQ_COMPRESSION_START
;
1138 * Mapping between Global System Interrupts, which
1139 * represent all possible interrupts, and IRQs
1140 * assigned to actual devices.
1142 static int gsi_to_irq
[MAX_GSI_NUM
];
1145 if (acpi_irq_model
!= ACPI_IRQ_MODEL_IOAPIC
)
1149 /* Don't set up the ACPI SCI because it's already set up */
1150 if (acpi_gbl_FADT
.sci_interrupt
== gsi
)
1153 ioapic
= mp_find_ioapic(gsi
);
1155 printk(KERN_WARNING
"No IOAPIC for GSI %u\n", gsi
);
1159 ioapic_pin
= gsi
- mp_ioapic_routing
[ioapic
].gsi_base
;
1161 #ifdef CONFIG_X86_32
1162 if (ioapic_renumber_irq
)
1163 gsi
= ioapic_renumber_irq(ioapic
, gsi
);
1167 * Avoid pin reprogramming. PRTs typically include entries
1168 * with redundant pin->gsi mappings (but unique PCI devices);
1169 * we only program the IOAPIC on the first.
1171 if (ioapic_pin
> MP_MAX_IOAPIC_PIN
) {
1172 printk(KERN_ERR
"Invalid reference to IOAPIC pin "
1173 "%d-%d\n", mp_ioapic_routing
[ioapic
].apic_id
,
1177 if (test_bit(ioapic_pin
, mp_ioapic_routing
[ioapic
].pin_programmed
)) {
1178 pr_debug("Pin %d-%d already programmed\n",
1179 mp_ioapic_routing
[ioapic
].apic_id
, ioapic_pin
);
1180 #ifdef CONFIG_X86_32
1181 return (gsi
< IRQ_COMPRESSION_START
? gsi
: gsi_to_irq
[gsi
]);
1187 set_bit(ioapic_pin
, mp_ioapic_routing
[ioapic
].pin_programmed
);
1188 #ifdef CONFIG_X86_32
1190 * For GSI >= 64, use IRQ compression
1192 if ((gsi
>= IRQ_COMPRESSION_START
)
1193 && (triggering
== ACPI_LEVEL_SENSITIVE
)) {
1195 * For PCI devices assign IRQs in order, avoiding gaps
1196 * due to unused I/O APIC pins.
1199 if (gsi
< MAX_GSI_NUM
) {
1201 * Retain the VIA chipset work-around (gsi > 15), but
1202 * avoid a problem where the 8254 timer (IRQ0) is setup
1203 * via an override (so it's not on pin 0 of the ioapic),
1204 * and at the same time, the pin 0 interrupt is a PCI
1205 * type. The gsi > 15 test could cause these two pins
1206 * to be shared as IRQ0, and they are not shareable.
1207 * So test for this condition, and if necessary, avoid
1208 * the pin collision.
1212 * Don't assign IRQ used by ACPI SCI
1214 if (gsi
== acpi_gbl_FADT
.sci_interrupt
)
1216 gsi_to_irq
[irq
] = gsi
;
1218 printk(KERN_ERR
"GSI %u is too high\n", gsi
);
1223 io_apic_set_pci_routing(ioapic
, ioapic_pin
, gsi
,
1224 triggering
== ACPI_EDGE_SENSITIVE
? 0 : 1,
1225 polarity
== ACPI_ACTIVE_HIGH
? 0 : 1);
1229 int mp_config_acpi_gsi(unsigned char number
, unsigned int devfn
, u8 pin
,
1230 u32 gsi
, int triggering
, int polarity
)
1232 #ifdef CONFIG_X86_MPPARSE
1233 struct mp_config_intsrc mp_irq
;
1239 /* print the entry should happen on mptable identically */
1240 mp_irq
.mp_type
= MP_INTSRC
;
1241 mp_irq
.mp_irqtype
= mp_INT
;
1242 mp_irq
.mp_irqflag
= (triggering
== ACPI_EDGE_SENSITIVE
? 4 : 0x0c) |
1243 (polarity
== ACPI_ACTIVE_HIGH
? 1 : 3);
1244 mp_irq
.mp_srcbus
= number
;
1245 mp_irq
.mp_srcbusirq
= (((devfn
>> 3) & 0x1f) << 2) | ((pin
- 1) & 3);
1246 ioapic
= mp_find_ioapic(gsi
);
1247 mp_irq
.mp_dstapic
= mp_ioapic_routing
[ioapic
].apic_id
;
1248 mp_irq
.mp_dstirq
= gsi
- mp_ioapic_routing
[ioapic
].gsi_base
;
1250 save_mp_irq(&mp_irq
);
1256 * Parse IOAPIC related entries in MADT
1257 * returns 0 on success, < 0 on error
1259 static int __init
acpi_parse_madt_ioapic_entries(void)
1264 * ACPI interpreter is required to complete interrupt setup,
1265 * so if it is off, don't enumerate the io-apics with ACPI.
1266 * If MPS is present, it will handle them,
1267 * otherwise the system will stay in PIC mode
1269 if (acpi_disabled
|| acpi_noirq
) {
1277 * if "noapic" boot option, don't look for IO-APICs
1279 if (skip_ioapic_setup
) {
1280 printk(KERN_INFO PREFIX
"Skipping IOAPIC probe "
1281 "due to 'noapic' option.\n");
1286 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC
, acpi_parse_ioapic
,
1289 printk(KERN_ERR PREFIX
"No IOAPIC entries present\n");
1291 } else if (count
< 0) {
1292 printk(KERN_ERR PREFIX
"Error parsing IOAPIC entry\n");
1297 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE
, acpi_parse_int_src_ovr
,
1300 printk(KERN_ERR PREFIX
1301 "Error parsing interrupt source overrides entry\n");
1302 /* TBD: Cleanup to allow fallback to MPS */
1307 * If BIOS did not supply an INT_SRC_OVR for the SCI
1308 * pretend we got one so we can set the SCI flags.
1310 if (!acpi_sci_override_gsi
)
1311 acpi_sci_ioapic_setup(acpi_gbl_FADT
.sci_interrupt
, 0, 0);
1313 /* Fill in identity legacy mapings where no override */
1314 mp_config_acpi_legacy_irqs();
1317 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE
, acpi_parse_nmi_src
,
1320 printk(KERN_ERR PREFIX
"Error parsing NMI SRC entry\n");
1321 /* TBD: Cleanup to allow fallback to MPS */
1328 static inline int acpi_parse_madt_ioapic_entries(void)
1332 #endif /* !CONFIG_X86_IO_APIC */
1334 static void __init
early_acpi_process_madt(void)
1336 #ifdef CONFIG_X86_LOCAL_APIC
1339 if (!acpi_table_parse(ACPI_SIG_MADT
, acpi_parse_madt
)) {
1342 * Parse MADT LAPIC entries
1344 error
= early_acpi_parse_madt_lapic_addr_ovr();
1347 smp_found_config
= 1;
1349 if (error
== -EINVAL
) {
1351 * Dell Precision Workstation 410, 610 come here.
1353 printk(KERN_ERR PREFIX
1354 "Invalid BIOS MADT, disabling ACPI\n");
1361 static void __init
acpi_process_madt(void)
1363 #ifdef CONFIG_X86_LOCAL_APIC
1366 if (!acpi_table_parse(ACPI_SIG_MADT
, acpi_parse_madt
)) {
1369 * Parse MADT LAPIC entries
1371 error
= acpi_parse_madt_lapic_entries();
1375 #ifdef CONFIG_X86_GENERICARCH
1376 generic_bigsmp_probe();
1379 * Parse MADT IO-APIC entries
1381 error
= acpi_parse_madt_ioapic_entries();
1383 acpi_irq_model
= ACPI_IRQ_MODEL_IOAPIC
;
1386 smp_found_config
= 1;
1387 #ifdef CONFIG_X86_32
1388 setup_apic_routing();
1392 if (error
== -EINVAL
) {
1394 * Dell Precision Workstation 410, 610 come here.
1396 printk(KERN_ERR PREFIX
1397 "Invalid BIOS MADT, disabling ACPI\n");
1402 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1403 * In the event an MPS table was found, forget it.
1404 * Boot with "acpi=off" to use MPS on such a system.
1406 if (smp_found_config
) {
1407 printk(KERN_WARNING PREFIX
1408 "No APIC-table, disabling MPS\n");
1409 smp_found_config
= 0;
1414 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1415 * processors, where MPS only supports physical.
1417 if (acpi_lapic
&& acpi_ioapic
)
1418 printk(KERN_INFO
"Using ACPI (MADT) for SMP configuration "
1420 else if (acpi_lapic
)
1421 printk(KERN_INFO
"Using ACPI for processor (LAPIC) "
1422 "configuration information\n");
1427 static int __init
disable_acpi_irq(const struct dmi_system_id
*d
)
1430 printk(KERN_NOTICE
"%s detected: force use of acpi=noirq\n",
1437 static int __init
disable_acpi_pci(const struct dmi_system_id
*d
)
1440 printk(KERN_NOTICE
"%s detected: force use of pci=noacpi\n",
1447 static int __init
dmi_disable_acpi(const struct dmi_system_id
*d
)
1450 printk(KERN_NOTICE
"%s detected: acpi off\n", d
->ident
);
1454 "Warning: DMI blacklist says broken, but acpi forced\n");
1460 * Limit ACPI to CPU enumeration for HT
1462 static int __init
force_acpi_ht(const struct dmi_system_id
*d
)
1465 printk(KERN_NOTICE
"%s detected: force use of acpi=ht\n",
1471 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1477 * Force ignoring BIOS IRQ0 pin2 override
1479 static int __init
dmi_ignore_irq0_timer_override(const struct dmi_system_id
*d
)
1482 * The ati_ixp4x0_rev() early PCI quirk should have set
1483 * the acpi_skip_timer_override flag already:
1485 if (!acpi_skip_timer_override
) {
1486 WARN(1, KERN_ERR
"ati_ixp4x0 quirk not complete.\n");
1487 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1489 acpi_skip_timer_override
= 1;
1495 * If your system is blacklisted here, but you find that acpi=force
1496 * works for you, please contact acpi-devel@sourceforge.net
1498 static struct dmi_system_id __initdata acpi_dmi_table
[] = {
1500 * Boxes that need ACPI disabled
1503 .callback
= dmi_disable_acpi
,
1504 .ident
= "IBM Thinkpad",
1506 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1507 DMI_MATCH(DMI_BOARD_NAME
, "2629H1G"),
1512 * Boxes that need acpi=ht
1515 .callback
= force_acpi_ht
,
1516 .ident
= "FSC Primergy T850",
1518 DMI_MATCH(DMI_SYS_VENDOR
, "FUJITSU SIEMENS"),
1519 DMI_MATCH(DMI_PRODUCT_NAME
, "PRIMERGY T850"),
1523 .callback
= force_acpi_ht
,
1524 .ident
= "HP VISUALIZE NT Workstation",
1526 DMI_MATCH(DMI_BOARD_VENDOR
, "Hewlett-Packard"),
1527 DMI_MATCH(DMI_PRODUCT_NAME
, "HP VISUALIZE NT Workstation"),
1531 .callback
= force_acpi_ht
,
1532 .ident
= "Compaq Workstation W8000",
1534 DMI_MATCH(DMI_SYS_VENDOR
, "Compaq"),
1535 DMI_MATCH(DMI_PRODUCT_NAME
, "Workstation W8000"),
1539 .callback
= force_acpi_ht
,
1540 .ident
= "ASUS P4B266",
1542 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1543 DMI_MATCH(DMI_BOARD_NAME
, "P4B266"),
1547 .callback
= force_acpi_ht
,
1548 .ident
= "ASUS P2B-DS",
1550 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1551 DMI_MATCH(DMI_BOARD_NAME
, "P2B-DS"),
1555 .callback
= force_acpi_ht
,
1556 .ident
= "ASUS CUR-DLS",
1558 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1559 DMI_MATCH(DMI_BOARD_NAME
, "CUR-DLS"),
1563 .callback
= force_acpi_ht
,
1564 .ident
= "ABIT i440BX-W83977",
1566 DMI_MATCH(DMI_BOARD_VENDOR
, "ABIT <http://www.abit.com>"),
1567 DMI_MATCH(DMI_BOARD_NAME
, "i440BX-W83977 (BP6)"),
1571 .callback
= force_acpi_ht
,
1572 .ident
= "IBM Bladecenter",
1574 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1575 DMI_MATCH(DMI_BOARD_NAME
, "IBM eServer BladeCenter HS20"),
1579 .callback
= force_acpi_ht
,
1580 .ident
= "IBM eServer xSeries 360",
1582 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1583 DMI_MATCH(DMI_BOARD_NAME
, "eServer xSeries 360"),
1587 .callback
= force_acpi_ht
,
1588 .ident
= "IBM eserver xSeries 330",
1590 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1591 DMI_MATCH(DMI_BOARD_NAME
, "eserver xSeries 330"),
1595 .callback
= force_acpi_ht
,
1596 .ident
= "IBM eserver xSeries 440",
1598 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1599 DMI_MATCH(DMI_PRODUCT_NAME
, "eserver xSeries 440"),
1604 * Boxes that need ACPI PCI IRQ routing disabled
1607 .callback
= disable_acpi_irq
,
1608 .ident
= "ASUS A7V",
1610 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC"),
1611 DMI_MATCH(DMI_BOARD_NAME
, "<A7V>"),
1612 /* newer BIOS, Revision 1011, does work */
1613 DMI_MATCH(DMI_BIOS_VERSION
,
1614 "ASUS A7V ACPI BIOS Revision 1007"),
1619 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1620 * for LPC bridge, which is needed for the PCI
1621 * interrupt links to work. DSDT fix is in bug 5966.
1622 * 2645, 2646 model numbers are shared with 600/600E/600X
1624 .callback
= disable_acpi_irq
,
1625 .ident
= "IBM Thinkpad 600 Series 2645",
1627 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1628 DMI_MATCH(DMI_BOARD_NAME
, "2645"),
1632 .callback
= disable_acpi_irq
,
1633 .ident
= "IBM Thinkpad 600 Series 2646",
1635 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1636 DMI_MATCH(DMI_BOARD_NAME
, "2646"),
1640 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1643 .callback
= disable_acpi_pci
,
1644 .ident
= "ASUS PR-DLS",
1646 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1647 DMI_MATCH(DMI_BOARD_NAME
, "PR-DLS"),
1648 DMI_MATCH(DMI_BIOS_VERSION
,
1649 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1650 DMI_MATCH(DMI_BIOS_DATE
, "03/21/2003")
1654 .callback
= disable_acpi_pci
,
1655 .ident
= "Acer TravelMate 36x Laptop",
1657 DMI_MATCH(DMI_SYS_VENDOR
, "Acer"),
1658 DMI_MATCH(DMI_PRODUCT_NAME
, "TravelMate 360"),
1664 /* second table for DMI checks that should run after early-quirks */
1665 static struct dmi_system_id __initdata acpi_dmi_table_late
[] = {
1667 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1668 * which includes some code which overrides all temperature
1669 * trip points to 16C if the INTIN2 input of the I/O APIC
1670 * is enabled. This input is incorrectly designated the
1671 * ISA IRQ 0 via an interrupt source override even though
1672 * it is wired to the output of the master 8259A and INTIN0
1673 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1674 * override in that cases.
1677 .callback
= dmi_ignore_irq0_timer_override
,
1678 .ident
= "HP nx6115 laptop",
1680 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1681 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq nx6115"),
1685 .callback
= dmi_ignore_irq0_timer_override
,
1686 .ident
= "HP NX6125 laptop",
1688 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1689 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq nx6125"),
1693 .callback
= dmi_ignore_irq0_timer_override
,
1694 .ident
= "HP NX6325 laptop",
1696 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1697 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq nx6325"),
1701 .callback
= dmi_ignore_irq0_timer_override
,
1702 .ident
= "HP 6715b laptop",
1704 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1705 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq 6715b"),
1712 * acpi_boot_table_init() and acpi_boot_init()
1713 * called from setup_arch(), always.
1714 * 1. checksums all tables
1715 * 2. enumerates lapics
1716 * 3. enumerates io-apics
1718 * acpi_table_init() is separate to allow reading SRAT without
1719 * other side effects.
1721 * side effects of acpi_boot_init:
1722 * acpi_lapic = 1 if LAPIC found
1723 * acpi_ioapic = 1 if IOAPIC found
1724 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1725 * if acpi_blacklisted() acpi_disabled = 1;
1726 * acpi_irq_model=...
1729 * return value: (currently ignored)
1734 int __init
acpi_boot_table_init(void)
1738 dmi_check_system(acpi_dmi_table
);
1741 * If acpi_disabled, bail out
1742 * One exception: acpi=ht continues far enough to enumerate LAPICs
1744 if (acpi_disabled
&& !acpi_ht
)
1748 * Initialize the ACPI boot-time table parser.
1750 error
= acpi_table_init();
1756 acpi_table_parse(ACPI_SIG_BOOT
, acpi_parse_sbf
);
1759 * blacklist may disable ACPI entirely
1761 error
= acpi_blacklisted();
1764 printk(KERN_WARNING PREFIX
"acpi=force override\n");
1766 printk(KERN_WARNING PREFIX
"Disabling ACPI support\n");
1775 int __init
early_acpi_boot_init(void)
1778 * If acpi_disabled, bail out
1779 * One exception: acpi=ht continues far enough to enumerate LAPICs
1781 if (acpi_disabled
&& !acpi_ht
)
1785 * Process the Multiple APIC Description Table (MADT), if present
1787 early_acpi_process_madt();
1792 int __init
acpi_boot_init(void)
1794 /* those are executed after early-quirks are executed */
1795 dmi_check_system(acpi_dmi_table_late
);
1798 * If acpi_disabled, bail out
1799 * One exception: acpi=ht continues far enough to enumerate LAPICs
1801 if (acpi_disabled
&& !acpi_ht
)
1804 acpi_table_parse(ACPI_SIG_BOOT
, acpi_parse_sbf
);
1807 * set sci_int and PM timer address
1809 acpi_table_parse(ACPI_SIG_FADT
, acpi_parse_fadt
);
1812 * Process the Multiple APIC Description Table (MADT), if present
1814 acpi_process_madt();
1816 acpi_table_parse(ACPI_SIG_HPET
, acpi_parse_hpet
);
1821 static int __init
parse_acpi(char *arg
)
1826 /* "acpi=off" disables both ACPI table parsing and interpreter */
1827 if (strcmp(arg
, "off") == 0) {
1830 /* acpi=force to over-ride black-list */
1831 else if (strcmp(arg
, "force") == 0) {
1836 /* acpi=strict disables out-of-spec workarounds */
1837 else if (strcmp(arg
, "strict") == 0) {
1840 /* Limit ACPI just to boot-time to enable HT */
1841 else if (strcmp(arg
, "ht") == 0) {
1846 /* acpi=rsdt use RSDT instead of XSDT */
1847 else if (strcmp(arg
, "rsdt") == 0) {
1848 acpi_rsdt_forced
= 1;
1850 /* "acpi=noirq" disables ACPI interrupt routing */
1851 else if (strcmp(arg
, "noirq") == 0) {
1854 /* Core will printk when we return error. */
1859 early_param("acpi", parse_acpi
);
1861 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1862 static int __init
parse_pci(char *arg
)
1864 if (arg
&& strcmp(arg
, "noacpi") == 0)
1868 early_param("pci", parse_pci
);
1870 int __init
acpi_mps_check(void)
1872 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1873 /* mptable code is not built-in*/
1874 if (acpi_disabled
|| acpi_noirq
) {
1875 printk(KERN_WARNING
"MPS support code is not built-in.\n"
1876 "Using acpi=off or acpi=noirq or pci=noacpi "
1877 "may have problem\n");
1884 #ifdef CONFIG_X86_IO_APIC
1885 static int __init
parse_acpi_skip_timer_override(char *arg
)
1887 acpi_skip_timer_override
= 1;
1890 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override
);
1892 static int __init
parse_acpi_use_timer_override(char *arg
)
1894 acpi_use_timer_override
= 1;
1897 early_param("acpi_use_timer_override", parse_acpi_use_timer_override
);
1898 #endif /* CONFIG_X86_IO_APIC */
1900 static int __init
setup_acpi_sci(char *s
)
1904 if (!strcmp(s
, "edge"))
1905 acpi_sci_flags
= ACPI_MADT_TRIGGER_EDGE
|
1906 (acpi_sci_flags
& ~ACPI_MADT_TRIGGER_MASK
);
1907 else if (!strcmp(s
, "level"))
1908 acpi_sci_flags
= ACPI_MADT_TRIGGER_LEVEL
|
1909 (acpi_sci_flags
& ~ACPI_MADT_TRIGGER_MASK
);
1910 else if (!strcmp(s
, "high"))
1911 acpi_sci_flags
= ACPI_MADT_POLARITY_ACTIVE_HIGH
|
1912 (acpi_sci_flags
& ~ACPI_MADT_POLARITY_MASK
);
1913 else if (!strcmp(s
, "low"))
1914 acpi_sci_flags
= ACPI_MADT_POLARITY_ACTIVE_LOW
|
1915 (acpi_sci_flags
& ~ACPI_MADT_POLARITY_MASK
);
1920 early_param("acpi_sci", setup_acpi_sci
);
1922 int __acpi_acquire_global_lock(unsigned int *lock
)
1924 unsigned int old
, new, val
;
1927 new = (((old
& ~0x3) + 2) + ((old
>> 1) & 0x1));
1928 val
= cmpxchg(lock
, old
, new);
1929 } while (unlikely (val
!= old
));
1930 return (new < 3) ? -1 : 0;
1933 int __acpi_release_global_lock(unsigned int *lock
)
1935 unsigned int old
, new, val
;
1939 val
= cmpxchg(lock
, old
, new);
1940 } while (unlikely (val
!= old
));