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
156 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
157 struct acpi_mcfg_allocation
*pci_mmcfg_config
;
158 int pci_mmcfg_config_num
;
160 static int acpi_mcfg_64bit_base_addr __initdata
= FALSE
;
162 static int __init
acpi_mcfg_oem_check(struct acpi_table_mcfg
*mcfg
)
164 if (!strcmp(mcfg
->header
.oem_id
, "SGI"))
165 acpi_mcfg_64bit_base_addr
= TRUE
;
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
);
203 acpi_mcfg_oem_check(mcfg
);
205 for (i
= 0; i
< pci_mmcfg_config_num
; ++i
) {
206 if ((pci_mmcfg_config
[i
].address
> 0xFFFFFFFF) &&
207 !acpi_mcfg_64bit_base_addr
) {
208 printk(KERN_ERR PREFIX
209 "MMCONFIG not in low 4GB of memory\n");
210 kfree(pci_mmcfg_config
);
211 pci_mmcfg_config_num
= 0;
218 #endif /* CONFIG_PCI_MMCONFIG */
220 #ifdef CONFIG_X86_LOCAL_APIC
221 static int __init
acpi_parse_madt(struct acpi_table_header
*table
)
223 struct acpi_table_madt
*madt
= NULL
;
228 madt
= (struct acpi_table_madt
*)table
;
230 printk(KERN_WARNING PREFIX
"Unable to map MADT\n");
235 acpi_lapic_addr
= (u64
) madt
->address
;
237 printk(KERN_DEBUG PREFIX
"Local APIC address 0x%08x\n",
241 acpi_madt_oem_check(madt
->header
.oem_id
, madt
->header
.oem_table_id
);
246 static void __cpuinit
acpi_register_lapic(int id
, u8 enabled
)
248 unsigned int ver
= 0;
256 if (boot_cpu_physical_apicid
!= -1U)
257 ver
= apic_version
[boot_cpu_physical_apicid
];
260 generic_processor_info(id
, ver
);
264 acpi_parse_lapic(struct acpi_subtable_header
* header
, const unsigned long end
)
266 struct acpi_madt_local_apic
*processor
= NULL
;
268 processor
= (struct acpi_madt_local_apic
*)header
;
270 if (BAD_MADT_ENTRY(processor
, end
))
273 acpi_table_print_madt_entry(header
);
276 * We need to register disabled CPU as well to permit
277 * counting disabled CPUs. This allows us to size
278 * cpus_possible_map more accurately, to permit
279 * to not preallocating memory for all NR_CPUS
280 * when we use CPU hotplug.
282 acpi_register_lapic(processor
->id
, /* APIC ID */
283 processor
->lapic_flags
& ACPI_MADT_ENABLED
);
289 acpi_parse_sapic(struct acpi_subtable_header
*header
, const unsigned long end
)
291 struct acpi_madt_local_sapic
*processor
= NULL
;
293 processor
= (struct acpi_madt_local_sapic
*)header
;
295 if (BAD_MADT_ENTRY(processor
, end
))
298 acpi_table_print_madt_entry(header
);
300 acpi_register_lapic((processor
->id
<< 8) | processor
->eid
,/* APIC ID */
301 processor
->lapic_flags
& ACPI_MADT_ENABLED
);
307 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header
* header
,
308 const unsigned long end
)
310 struct acpi_madt_local_apic_override
*lapic_addr_ovr
= NULL
;
312 lapic_addr_ovr
= (struct acpi_madt_local_apic_override
*)header
;
314 if (BAD_MADT_ENTRY(lapic_addr_ovr
, end
))
317 acpi_lapic_addr
= lapic_addr_ovr
->address
;
323 acpi_parse_lapic_nmi(struct acpi_subtable_header
* header
, const unsigned long end
)
325 struct acpi_madt_local_apic_nmi
*lapic_nmi
= NULL
;
327 lapic_nmi
= (struct acpi_madt_local_apic_nmi
*)header
;
329 if (BAD_MADT_ENTRY(lapic_nmi
, end
))
332 acpi_table_print_madt_entry(header
);
334 if (lapic_nmi
->lint
!= 1)
335 printk(KERN_WARNING PREFIX
"NMI not connected to LINT 1!\n");
340 #endif /*CONFIG_X86_LOCAL_APIC */
342 #ifdef CONFIG_X86_IO_APIC
345 acpi_parse_ioapic(struct acpi_subtable_header
* header
, const unsigned long end
)
347 struct acpi_madt_io_apic
*ioapic
= NULL
;
349 ioapic
= (struct acpi_madt_io_apic
*)header
;
351 if (BAD_MADT_ENTRY(ioapic
, end
))
354 acpi_table_print_madt_entry(header
);
356 mp_register_ioapic(ioapic
->id
,
357 ioapic
->address
, ioapic
->global_irq_base
);
363 * Parse Interrupt Source Override for the ACPI SCI
365 static void __init
acpi_sci_ioapic_setup(u32 gsi
, u16 polarity
, u16 trigger
)
367 if (trigger
== 0) /* compatible SCI trigger is level */
370 if (polarity
== 0) /* compatible SCI polarity is low */
373 /* Command-line over-ride via acpi_sci= */
374 if (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
)
375 trigger
= (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2;
377 if (acpi_sci_flags
& ACPI_MADT_POLARITY_MASK
)
378 polarity
= acpi_sci_flags
& ACPI_MADT_POLARITY_MASK
;
381 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
382 * If GSI is < 16, this will update its flags,
383 * else it will create a new mp_irqs[] entry.
385 mp_override_legacy_irq(gsi
, polarity
, trigger
, gsi
);
388 * stash over-ride to indicate we've been here
389 * and for later update of acpi_gbl_FADT
391 acpi_sci_override_gsi
= gsi
;
396 acpi_parse_int_src_ovr(struct acpi_subtable_header
* header
,
397 const unsigned long end
)
399 struct acpi_madt_interrupt_override
*intsrc
= NULL
;
401 intsrc
= (struct acpi_madt_interrupt_override
*)header
;
403 if (BAD_MADT_ENTRY(intsrc
, end
))
406 acpi_table_print_madt_entry(header
);
408 if (intsrc
->source_irq
== acpi_gbl_FADT
.sci_interrupt
) {
409 acpi_sci_ioapic_setup(intsrc
->global_irq
,
410 intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
,
411 (intsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2);
415 if (acpi_skip_timer_override
&&
416 intsrc
->source_irq
== 0 && intsrc
->global_irq
== 2) {
417 printk(PREFIX
"BIOS IRQ0 pin2 override ignored.\n");
421 mp_override_legacy_irq(intsrc
->source_irq
,
422 intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
,
423 (intsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2,
430 acpi_parse_nmi_src(struct acpi_subtable_header
* header
, const unsigned long end
)
432 struct acpi_madt_nmi_source
*nmi_src
= NULL
;
434 nmi_src
= (struct acpi_madt_nmi_source
*)header
;
436 if (BAD_MADT_ENTRY(nmi_src
, end
))
439 acpi_table_print_madt_entry(header
);
441 /* TBD: Support nimsrc entries? */
446 #endif /* CONFIG_X86_IO_APIC */
449 * acpi_pic_sci_set_trigger()
451 * use ELCR to set PIC-mode trigger type for SCI
453 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
454 * it may require Edge Trigger -- use "acpi_sci=edge"
456 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
457 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
458 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
459 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
462 void __init
acpi_pic_sci_set_trigger(unsigned int irq
, u16 trigger
)
464 unsigned int mask
= 1 << irq
;
465 unsigned int old
, new;
467 /* Real old ELCR mask */
468 old
= inb(0x4d0) | (inb(0x4d1) << 8);
471 * If we use ACPI to set PCI IRQs, then we should clear ELCR
472 * since we will set it correctly as we enable the PCI irq
475 new = acpi_noirq
? old
: 0;
478 * Update SCI information in the ELCR, it isn't in the PCI
482 case 1: /* Edge - clear */
485 case 3: /* Level - set */
493 printk(PREFIX
"setting ELCR to %04x (from %04x)\n", new, old
);
495 outb(new >> 8, 0x4d1);
498 int acpi_gsi_to_irq(u32 gsi
, unsigned int *irq
)
505 * success: return IRQ number (>=0)
506 * failure: return < 0
508 int acpi_register_gsi(u32 gsi
, int triggering
, int polarity
)
511 unsigned int plat_gsi
= gsi
;
515 * Make sure all (legacy) PCI IRQs are set as level-triggered.
517 if (acpi_irq_model
== ACPI_IRQ_MODEL_PIC
) {
518 if (triggering
== ACPI_LEVEL_SENSITIVE
)
519 eisa_set_level_irq(gsi
);
523 #ifdef CONFIG_X86_IO_APIC
524 if (acpi_irq_model
== ACPI_IRQ_MODEL_IOAPIC
) {
525 plat_gsi
= mp_register_gsi(gsi
, triggering
, polarity
);
528 acpi_gsi_to_irq(plat_gsi
, &irq
);
533 * ACPI based hotplug support for CPU
535 #ifdef CONFIG_ACPI_HOTPLUG_CPU
537 static int __cpuinit
_acpi_map_lsapic(acpi_handle handle
, int *pcpu
)
539 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
540 union acpi_object
*obj
;
541 struct acpi_madt_local_apic
*lapic
;
542 cpumask_t tmp_map
, new_map
;
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 tmp_map
= cpu_present_map
;
574 acpi_register_lapic(physid
, lapic
->lapic_flags
& ACPI_MADT_ENABLED
);
577 * If mp_register_lapic successfully generates a new logical cpu
578 * number, then the following will get us exactly what was mapped
580 cpus_andnot(new_map
, cpu_present_map
, tmp_map
);
581 if (cpus_empty(new_map
)) {
582 printk ("Unable to map lapic to logical cpu number\n");
586 cpu
= first_cpu(new_map
);
592 /* wrapper to silence section mismatch warning */
593 int __ref
acpi_map_lsapic(acpi_handle handle
, int *pcpu
)
595 return _acpi_map_lsapic(handle
, pcpu
);
597 EXPORT_SYMBOL(acpi_map_lsapic
);
599 int acpi_unmap_lsapic(int cpu
)
601 per_cpu(x86_cpu_to_apicid
, cpu
) = -1;
602 cpu_clear(cpu
, cpu_present_map
);
608 EXPORT_SYMBOL(acpi_unmap_lsapic
);
609 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
611 int acpi_register_ioapic(acpi_handle handle
, u64 phys_addr
, u32 gsi_base
)
617 EXPORT_SYMBOL(acpi_register_ioapic
);
619 int acpi_unregister_ioapic(acpi_handle handle
, u32 gsi_base
)
625 EXPORT_SYMBOL(acpi_unregister_ioapic
);
627 static int __init
acpi_parse_sbf(struct acpi_table_header
*table
)
629 struct acpi_table_boot
*sb
;
631 sb
= (struct acpi_table_boot
*)table
;
633 printk(KERN_WARNING PREFIX
"Unable to map SBF\n");
637 sbf_port
= sb
->cmos_index
; /* Save CMOS port */
642 #ifdef CONFIG_HPET_TIMER
643 #include <asm/hpet.h>
645 static struct __initdata resource
*hpet_res
;
647 static int __init
acpi_parse_hpet(struct acpi_table_header
*table
)
649 struct acpi_table_hpet
*hpet_tbl
;
651 hpet_tbl
= (struct acpi_table_hpet
*)table
;
653 printk(KERN_WARNING PREFIX
"Unable to map HPET\n");
657 if (hpet_tbl
->address
.space_id
!= ACPI_SPACE_MEM
) {
658 printk(KERN_WARNING PREFIX
"HPET timers must be located in "
663 hpet_address
= hpet_tbl
->address
.address
;
666 * Some broken BIOSes advertise HPET at 0x0. We really do not
667 * want to allocate a resource there.
670 printk(KERN_WARNING PREFIX
671 "HPET id: %#x base: %#lx is invalid\n",
672 hpet_tbl
->id
, hpet_address
);
677 * Some even more broken BIOSes advertise HPET at
678 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
681 if (hpet_address
== 0xfed0000000000000UL
) {
682 if (!hpet_force_user
) {
683 printk(KERN_WARNING PREFIX
"HPET id: %#x "
684 "base: 0xfed0000000000000 is bogus\n "
685 "try hpet=force on the kernel command line to "
686 "fix it up to 0xfed00000.\n", hpet_tbl
->id
);
690 printk(KERN_WARNING PREFIX
691 "HPET id: %#x base: 0xfed0000000000000 fixed up "
692 "to 0xfed00000.\n", hpet_tbl
->id
);
696 printk(KERN_INFO PREFIX
"HPET id: %#x base: %#lx\n",
697 hpet_tbl
->id
, hpet_address
);
700 * Allocate and initialize the HPET firmware resource for adding into
701 * the resource tree during the lateinit timeframe.
703 #define HPET_RESOURCE_NAME_SIZE 9
704 hpet_res
= alloc_bootmem(sizeof(*hpet_res
) + HPET_RESOURCE_NAME_SIZE
);
706 hpet_res
->name
= (void *)&hpet_res
[1];
707 hpet_res
->flags
= IORESOURCE_MEM
;
708 snprintf((char *)hpet_res
->name
, HPET_RESOURCE_NAME_SIZE
, "HPET %u",
711 hpet_res
->start
= hpet_address
;
712 hpet_res
->end
= hpet_address
+ (1 * 1024) - 1;
718 * hpet_insert_resource inserts the HPET resources used into the resource
721 static __init
int hpet_insert_resource(void)
726 return insert_resource(&iomem_resource
, hpet_res
);
729 late_initcall(hpet_insert_resource
);
732 #define acpi_parse_hpet NULL
735 static int __init
acpi_parse_fadt(struct acpi_table_header
*table
)
738 #ifdef CONFIG_X86_PM_TIMER
739 /* detect the location of the ACPI PM Timer */
740 if (acpi_gbl_FADT
.header
.revision
>= FADT2_REVISION_ID
) {
742 if (acpi_gbl_FADT
.xpm_timer_block
.space_id
!=
743 ACPI_ADR_SPACE_SYSTEM_IO
)
746 pmtmr_ioport
= acpi_gbl_FADT
.xpm_timer_block
.address
;
748 * "X" fields are optional extensions to the original V1.0
749 * fields, so we must selectively expand V1.0 fields if the
750 * corresponding X field is zero.
753 pmtmr_ioport
= acpi_gbl_FADT
.pm_timer_block
;
756 pmtmr_ioport
= acpi_gbl_FADT
.pm_timer_block
;
759 printk(KERN_INFO PREFIX
"PM-Timer IO Port: %#x\n",
765 #ifdef CONFIG_X86_LOCAL_APIC
767 * Parse LAPIC entries in MADT
768 * returns 0 on success, < 0 on error
771 static void __init
acpi_register_lapic_address(unsigned long address
)
773 mp_lapic_addr
= address
;
775 set_fixmap_nocache(FIX_APIC_BASE
, address
);
776 if (boot_cpu_physical_apicid
== -1U) {
777 boot_cpu_physical_apicid
= GET_APIC_ID(read_apic_id());
779 apic_version
[boot_cpu_physical_apicid
] =
780 GET_APIC_VERSION(apic_read(APIC_LVR
));
785 static int __init
early_acpi_parse_madt_lapic_addr_ovr(void)
793 * Note that the LAPIC address is obtained from the MADT (32-bit value)
794 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
798 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE
,
799 acpi_parse_lapic_addr_ovr
, 0);
801 printk(KERN_ERR PREFIX
802 "Error parsing LAPIC address override entry\n");
806 acpi_register_lapic_address(acpi_lapic_addr
);
811 static int __init
acpi_parse_madt_lapic_entries(void)
819 * Note that the LAPIC address is obtained from the MADT (32-bit value)
820 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
824 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE
,
825 acpi_parse_lapic_addr_ovr
, 0);
827 printk(KERN_ERR PREFIX
828 "Error parsing LAPIC address override entry\n");
832 acpi_register_lapic_address(acpi_lapic_addr
);
834 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC
,
835 acpi_parse_sapic
, MAX_APICS
);
838 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC
,
839 acpi_parse_lapic
, MAX_APICS
);
841 printk(KERN_ERR PREFIX
"No LAPIC entries present\n");
842 /* TBD: Cleanup to allow fallback to MPS */
844 } else if (count
< 0) {
845 printk(KERN_ERR PREFIX
"Error parsing LAPIC entry\n");
846 /* TBD: Cleanup to allow fallback to MPS */
851 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI
, acpi_parse_lapic_nmi
, 0);
853 printk(KERN_ERR PREFIX
"Error parsing LAPIC NMI entry\n");
854 /* TBD: Cleanup to allow fallback to MPS */
859 #endif /* CONFIG_X86_LOCAL_APIC */
861 #ifdef CONFIG_X86_IO_APIC
864 #ifdef CONFIG_X86_ES7000
865 extern int es7000_plat
;
872 DECLARE_BITMAP(pin_programmed
, MP_MAX_IOAPIC_PIN
+ 1);
873 } mp_ioapic_routing
[MAX_IO_APICS
];
875 static int mp_find_ioapic(int gsi
)
879 /* Find the IOAPIC that manages this GSI. */
880 for (i
= 0; i
< nr_ioapics
; i
++) {
881 if ((gsi
>= mp_ioapic_routing
[i
].gsi_base
)
882 && (gsi
<= mp_ioapic_routing
[i
].gsi_end
))
886 printk(KERN_ERR
"ERROR: Unable to locate IOAPIC for GSI %d\n", gsi
);
890 static u8 __init
uniq_ioapic_id(u8 id
)
893 if ((boot_cpu_data
.x86_vendor
== X86_VENDOR_INTEL
) &&
894 !APIC_XAPIC(apic_version
[boot_cpu_physical_apicid
]))
895 return io_apic_get_unique_id(nr_ioapics
, id
);
900 DECLARE_BITMAP(used
, 256);
901 bitmap_zero(used
, 256);
902 for (i
= 0; i
< nr_ioapics
; i
++) {
903 struct mp_config_ioapic
*ia
= &mp_ioapics
[i
];
904 __set_bit(ia
->mp_apicid
, used
);
906 if (!test_bit(id
, used
))
908 return find_first_zero_bit(used
, 256);
912 static int bad_ioapic(unsigned long address
)
914 if (nr_ioapics
>= MAX_IO_APICS
) {
915 printk(KERN_ERR
"ERROR: Max # of I/O APICs (%d) exceeded "
916 "(found %d)\n", MAX_IO_APICS
, nr_ioapics
);
917 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
920 printk(KERN_ERR
"WARNING: Bogus (zero) I/O APIC address"
921 " found in table, skipping!\n");
927 void __init
mp_register_ioapic(int id
, u32 address
, u32 gsi_base
)
931 if (bad_ioapic(address
))
936 mp_ioapics
[idx
].mp_type
= MP_IOAPIC
;
937 mp_ioapics
[idx
].mp_flags
= MPC_APIC_USABLE
;
938 mp_ioapics
[idx
].mp_apicaddr
= address
;
940 set_fixmap_nocache(FIX_IO_APIC_BASE_0
+ idx
, address
);
941 mp_ioapics
[idx
].mp_apicid
= uniq_ioapic_id(id
);
943 mp_ioapics
[idx
].mp_apicver
= io_apic_get_version(idx
);
945 mp_ioapics
[idx
].mp_apicver
= 0;
948 * Build basic GSI lookup table to facilitate gsi->io_apic lookups
949 * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
951 mp_ioapic_routing
[idx
].apic_id
= mp_ioapics
[idx
].mp_apicid
;
952 mp_ioapic_routing
[idx
].gsi_base
= gsi_base
;
953 mp_ioapic_routing
[idx
].gsi_end
= gsi_base
+
954 io_apic_get_redir_entries(idx
);
956 printk(KERN_INFO
"IOAPIC[%d]: apic_id %d, version %d, address 0x%lx, "
957 "GSI %d-%d\n", idx
, mp_ioapics
[idx
].mp_apicid
,
958 mp_ioapics
[idx
].mp_apicver
, mp_ioapics
[idx
].mp_apicaddr
,
959 mp_ioapic_routing
[idx
].gsi_base
, mp_ioapic_routing
[idx
].gsi_end
);
964 static void assign_to_mp_irq(struct mp_config_intsrc
*m
,
965 struct mp_config_intsrc
*mp_irq
)
967 memcpy(mp_irq
, m
, sizeof(struct mp_config_intsrc
));
970 static int mp_irq_cmp(struct mp_config_intsrc
*mp_irq
,
971 struct mp_config_intsrc
*m
)
973 return memcmp(mp_irq
, m
, sizeof(struct mp_config_intsrc
));
976 static void save_mp_irq(struct mp_config_intsrc
*m
)
980 for (i
= 0; i
< mp_irq_entries
; i
++) {
981 if (!mp_irq_cmp(&mp_irqs
[i
], m
))
985 assign_to_mp_irq(m
, &mp_irqs
[mp_irq_entries
]);
986 if (++mp_irq_entries
== MAX_IRQ_SOURCES
)
987 panic("Max # of irq sources exceeded!!\n");
990 void __init
mp_override_legacy_irq(u8 bus_irq
, u8 polarity
, u8 trigger
, u32 gsi
)
994 struct mp_config_intsrc mp_irq
;
997 * Convert 'gsi' to 'ioapic.pin'.
999 ioapic
= mp_find_ioapic(gsi
);
1002 pin
= gsi
- mp_ioapic_routing
[ioapic
].gsi_base
;
1005 * TBD: This check is for faulty timer entries, where the override
1006 * erroneously sets the trigger to level, resulting in a HUGE
1007 * increase of timer interrupts!
1009 if ((bus_irq
== 0) && (trigger
== 3))
1012 mp_irq
.mp_type
= MP_INTSRC
;
1013 mp_irq
.mp_irqtype
= mp_INT
;
1014 mp_irq
.mp_irqflag
= (trigger
<< 2) | polarity
;
1015 mp_irq
.mp_srcbus
= MP_ISA_BUS
;
1016 mp_irq
.mp_srcbusirq
= bus_irq
; /* IRQ */
1017 mp_irq
.mp_dstapic
= mp_ioapics
[ioapic
].mp_apicid
; /* APIC ID */
1018 mp_irq
.mp_dstirq
= pin
; /* INTIN# */
1020 save_mp_irq(&mp_irq
);
1023 void __init
mp_config_acpi_legacy_irqs(void)
1027 unsigned int dstapic
;
1028 struct mp_config_intsrc mp_irq
;
1030 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
1032 * Fabricate the legacy ISA bus (bus #31).
1034 mp_bus_id_to_type
[MP_ISA_BUS
] = MP_BUS_ISA
;
1036 set_bit(MP_ISA_BUS
, mp_bus_not_pci
);
1037 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS
);
1039 #ifdef CONFIG_X86_ES7000
1041 * Older generations of ES7000 have no legacy identity mappings
1043 if (es7000_plat
== 1)
1048 * Locate the IOAPIC that manages the ISA IRQs (0-15).
1050 ioapic
= mp_find_ioapic(0);
1053 dstapic
= mp_ioapics
[ioapic
].mp_apicid
;
1056 * Use the default configuration for the IRQs 0-15. Unless
1057 * overridden by (MADT) interrupt source override entries.
1059 for (i
= 0; i
< 16; i
++) {
1062 for (idx
= 0; idx
< mp_irq_entries
; idx
++) {
1063 struct mp_config_intsrc
*irq
= mp_irqs
+ idx
;
1065 /* Do we already have a mapping for this ISA IRQ? */
1066 if (irq
->mp_srcbus
== MP_ISA_BUS
1067 && irq
->mp_srcbusirq
== i
)
1070 /* Do we already have a mapping for this IOAPIC pin */
1071 if (irq
->mp_dstapic
== dstapic
&&
1072 irq
->mp_dstirq
== i
)
1076 if (idx
!= mp_irq_entries
) {
1077 printk(KERN_DEBUG
"ACPI: IRQ%d used by override.\n", i
);
1078 continue; /* IRQ already used */
1081 mp_irq
.mp_type
= MP_INTSRC
;
1082 mp_irq
.mp_irqflag
= 0; /* Conforming */
1083 mp_irq
.mp_srcbus
= MP_ISA_BUS
;
1084 mp_irq
.mp_dstapic
= dstapic
;
1085 mp_irq
.mp_irqtype
= mp_INT
;
1086 mp_irq
.mp_srcbusirq
= i
; /* Identity mapped */
1087 mp_irq
.mp_dstirq
= i
;
1089 save_mp_irq(&mp_irq
);
1093 int mp_register_gsi(u32 gsi
, int triggering
, int polarity
)
1097 #ifdef CONFIG_X86_32
1098 #define MAX_GSI_NUM 4096
1099 #define IRQ_COMPRESSION_START 64
1101 static int pci_irq
= IRQ_COMPRESSION_START
;
1103 * Mapping between Global System Interrupts, which
1104 * represent all possible interrupts, and IRQs
1105 * assigned to actual devices.
1107 static int gsi_to_irq
[MAX_GSI_NUM
];
1110 if (acpi_irq_model
!= ACPI_IRQ_MODEL_IOAPIC
)
1114 /* Don't set up the ACPI SCI because it's already set up */
1115 if (acpi_gbl_FADT
.sci_interrupt
== gsi
)
1118 ioapic
= mp_find_ioapic(gsi
);
1120 printk(KERN_WARNING
"No IOAPIC for GSI %u\n", gsi
);
1124 ioapic_pin
= gsi
- mp_ioapic_routing
[ioapic
].gsi_base
;
1126 #ifdef CONFIG_X86_32
1127 if (ioapic_renumber_irq
)
1128 gsi
= ioapic_renumber_irq(ioapic
, gsi
);
1132 * Avoid pin reprogramming. PRTs typically include entries
1133 * with redundant pin->gsi mappings (but unique PCI devices);
1134 * we only program the IOAPIC on the first.
1136 if (ioapic_pin
> MP_MAX_IOAPIC_PIN
) {
1137 printk(KERN_ERR
"Invalid reference to IOAPIC pin "
1138 "%d-%d\n", mp_ioapic_routing
[ioapic
].apic_id
,
1142 if (test_bit(ioapic_pin
, mp_ioapic_routing
[ioapic
].pin_programmed
)) {
1143 pr_debug(KERN_DEBUG
"Pin %d-%d already programmed\n",
1144 mp_ioapic_routing
[ioapic
].apic_id
, ioapic_pin
);
1145 #ifdef CONFIG_X86_32
1146 return (gsi
< IRQ_COMPRESSION_START
? gsi
: gsi_to_irq
[gsi
]);
1152 set_bit(ioapic_pin
, mp_ioapic_routing
[ioapic
].pin_programmed
);
1153 #ifdef CONFIG_X86_32
1155 * For GSI >= 64, use IRQ compression
1157 if ((gsi
>= IRQ_COMPRESSION_START
)
1158 && (triggering
== ACPI_LEVEL_SENSITIVE
)) {
1160 * For PCI devices assign IRQs in order, avoiding gaps
1161 * due to unused I/O APIC pins.
1164 if (gsi
< MAX_GSI_NUM
) {
1166 * Retain the VIA chipset work-around (gsi > 15), but
1167 * avoid a problem where the 8254 timer (IRQ0) is setup
1168 * via an override (so it's not on pin 0 of the ioapic),
1169 * and at the same time, the pin 0 interrupt is a PCI
1170 * type. The gsi > 15 test could cause these two pins
1171 * to be shared as IRQ0, and they are not shareable.
1172 * So test for this condition, and if necessary, avoid
1173 * the pin collision.
1177 * Don't assign IRQ used by ACPI SCI
1179 if (gsi
== acpi_gbl_FADT
.sci_interrupt
)
1181 gsi_to_irq
[irq
] = gsi
;
1183 printk(KERN_ERR
"GSI %u is too high\n", gsi
);
1188 io_apic_set_pci_routing(ioapic
, ioapic_pin
, gsi
,
1189 triggering
== ACPI_EDGE_SENSITIVE
? 0 : 1,
1190 polarity
== ACPI_ACTIVE_HIGH
? 0 : 1);
1194 int mp_config_acpi_gsi(unsigned char number
, unsigned int devfn
, u8 pin
,
1195 u32 gsi
, int triggering
, int polarity
)
1197 #ifdef CONFIG_X86_MPPARSE
1198 struct mp_config_intsrc mp_irq
;
1204 /* print the entry should happen on mptable identically */
1205 mp_irq
.mp_type
= MP_INTSRC
;
1206 mp_irq
.mp_irqtype
= mp_INT
;
1207 mp_irq
.mp_irqflag
= (triggering
== ACPI_EDGE_SENSITIVE
? 4 : 0x0c) |
1208 (polarity
== ACPI_ACTIVE_HIGH
? 1 : 3);
1209 mp_irq
.mp_srcbus
= number
;
1210 mp_irq
.mp_srcbusirq
= (((devfn
>> 3) & 0x1f) << 2) | ((pin
- 1) & 3);
1211 ioapic
= mp_find_ioapic(gsi
);
1212 mp_irq
.mp_dstapic
= mp_ioapic_routing
[ioapic
].apic_id
;
1213 mp_irq
.mp_dstirq
= gsi
- mp_ioapic_routing
[ioapic
].gsi_base
;
1215 save_mp_irq(&mp_irq
);
1221 * Parse IOAPIC related entries in MADT
1222 * returns 0 on success, < 0 on error
1224 static int __init
acpi_parse_madt_ioapic_entries(void)
1229 * ACPI interpreter is required to complete interrupt setup,
1230 * so if it is off, don't enumerate the io-apics with ACPI.
1231 * If MPS is present, it will handle them,
1232 * otherwise the system will stay in PIC mode
1234 if (acpi_disabled
|| acpi_noirq
) {
1242 * if "noapic" boot option, don't look for IO-APICs
1244 if (skip_ioapic_setup
) {
1245 printk(KERN_INFO PREFIX
"Skipping IOAPIC probe "
1246 "due to 'noapic' option.\n");
1251 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC
, acpi_parse_ioapic
,
1254 printk(KERN_ERR PREFIX
"No IOAPIC entries present\n");
1256 } else if (count
< 0) {
1257 printk(KERN_ERR PREFIX
"Error parsing IOAPIC entry\n");
1262 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE
, acpi_parse_int_src_ovr
,
1265 printk(KERN_ERR PREFIX
1266 "Error parsing interrupt source overrides entry\n");
1267 /* TBD: Cleanup to allow fallback to MPS */
1272 * If BIOS did not supply an INT_SRC_OVR for the SCI
1273 * pretend we got one so we can set the SCI flags.
1275 if (!acpi_sci_override_gsi
)
1276 acpi_sci_ioapic_setup(acpi_gbl_FADT
.sci_interrupt
, 0, 0);
1278 /* Fill in identity legacy mapings where no override */
1279 mp_config_acpi_legacy_irqs();
1282 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE
, acpi_parse_nmi_src
,
1285 printk(KERN_ERR PREFIX
"Error parsing NMI SRC entry\n");
1286 /* TBD: Cleanup to allow fallback to MPS */
1293 static inline int acpi_parse_madt_ioapic_entries(void)
1297 #endif /* !CONFIG_X86_IO_APIC */
1299 static void __init
early_acpi_process_madt(void)
1301 #ifdef CONFIG_X86_LOCAL_APIC
1304 if (!acpi_table_parse(ACPI_SIG_MADT
, acpi_parse_madt
)) {
1307 * Parse MADT LAPIC entries
1309 error
= early_acpi_parse_madt_lapic_addr_ovr();
1312 smp_found_config
= 1;
1314 if (error
== -EINVAL
) {
1316 * Dell Precision Workstation 410, 610 come here.
1318 printk(KERN_ERR PREFIX
1319 "Invalid BIOS MADT, disabling ACPI\n");
1326 static void __init
acpi_process_madt(void)
1328 #ifdef CONFIG_X86_LOCAL_APIC
1331 if (!acpi_table_parse(ACPI_SIG_MADT
, acpi_parse_madt
)) {
1334 * Parse MADT LAPIC entries
1336 error
= acpi_parse_madt_lapic_entries();
1340 #ifdef CONFIG_X86_GENERICARCH
1341 generic_bigsmp_probe();
1344 * Parse MADT IO-APIC entries
1346 error
= acpi_parse_madt_ioapic_entries();
1348 acpi_irq_model
= ACPI_IRQ_MODEL_IOAPIC
;
1349 acpi_irq_balance_set(NULL
);
1352 smp_found_config
= 1;
1353 setup_apic_routing();
1356 if (error
== -EINVAL
) {
1358 * Dell Precision Workstation 410, 610 come here.
1360 printk(KERN_ERR PREFIX
1361 "Invalid BIOS MADT, disabling ACPI\n");
1369 static int __init
disable_acpi_irq(const struct dmi_system_id
*d
)
1372 printk(KERN_NOTICE
"%s detected: force use of acpi=noirq\n",
1379 static int __init
disable_acpi_pci(const struct dmi_system_id
*d
)
1382 printk(KERN_NOTICE
"%s detected: force use of pci=noacpi\n",
1389 static int __init
dmi_disable_acpi(const struct dmi_system_id
*d
)
1392 printk(KERN_NOTICE
"%s detected: acpi off\n", d
->ident
);
1396 "Warning: DMI blacklist says broken, but acpi forced\n");
1402 * Limit ACPI to CPU enumeration for HT
1404 static int __init
force_acpi_ht(const struct dmi_system_id
*d
)
1407 printk(KERN_NOTICE
"%s detected: force use of acpi=ht\n",
1413 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1419 * Force ignoring BIOS IRQ0 pin2 override
1421 static int __init
dmi_ignore_irq0_timer_override(const struct dmi_system_id
*d
)
1423 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", d
->ident
);
1424 acpi_skip_timer_override
= 1;
1429 * If your system is blacklisted here, but you find that acpi=force
1430 * works for you, please contact acpi-devel@sourceforge.net
1432 static struct dmi_system_id __initdata acpi_dmi_table
[] = {
1434 * Boxes that need ACPI disabled
1437 .callback
= dmi_disable_acpi
,
1438 .ident
= "IBM Thinkpad",
1440 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1441 DMI_MATCH(DMI_BOARD_NAME
, "2629H1G"),
1446 * Boxes that need acpi=ht
1449 .callback
= force_acpi_ht
,
1450 .ident
= "FSC Primergy T850",
1452 DMI_MATCH(DMI_SYS_VENDOR
, "FUJITSU SIEMENS"),
1453 DMI_MATCH(DMI_PRODUCT_NAME
, "PRIMERGY T850"),
1457 .callback
= force_acpi_ht
,
1458 .ident
= "HP VISUALIZE NT Workstation",
1460 DMI_MATCH(DMI_BOARD_VENDOR
, "Hewlett-Packard"),
1461 DMI_MATCH(DMI_PRODUCT_NAME
, "HP VISUALIZE NT Workstation"),
1465 .callback
= force_acpi_ht
,
1466 .ident
= "Compaq Workstation W8000",
1468 DMI_MATCH(DMI_SYS_VENDOR
, "Compaq"),
1469 DMI_MATCH(DMI_PRODUCT_NAME
, "Workstation W8000"),
1473 .callback
= force_acpi_ht
,
1474 .ident
= "ASUS P4B266",
1476 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1477 DMI_MATCH(DMI_BOARD_NAME
, "P4B266"),
1481 .callback
= force_acpi_ht
,
1482 .ident
= "ASUS P2B-DS",
1484 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1485 DMI_MATCH(DMI_BOARD_NAME
, "P2B-DS"),
1489 .callback
= force_acpi_ht
,
1490 .ident
= "ASUS CUR-DLS",
1492 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1493 DMI_MATCH(DMI_BOARD_NAME
, "CUR-DLS"),
1497 .callback
= force_acpi_ht
,
1498 .ident
= "ABIT i440BX-W83977",
1500 DMI_MATCH(DMI_BOARD_VENDOR
, "ABIT <http://www.abit.com>"),
1501 DMI_MATCH(DMI_BOARD_NAME
, "i440BX-W83977 (BP6)"),
1505 .callback
= force_acpi_ht
,
1506 .ident
= "IBM Bladecenter",
1508 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1509 DMI_MATCH(DMI_BOARD_NAME
, "IBM eServer BladeCenter HS20"),
1513 .callback
= force_acpi_ht
,
1514 .ident
= "IBM eServer xSeries 360",
1516 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1517 DMI_MATCH(DMI_BOARD_NAME
, "eServer xSeries 360"),
1521 .callback
= force_acpi_ht
,
1522 .ident
= "IBM eserver xSeries 330",
1524 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1525 DMI_MATCH(DMI_BOARD_NAME
, "eserver xSeries 330"),
1529 .callback
= force_acpi_ht
,
1530 .ident
= "IBM eserver xSeries 440",
1532 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1533 DMI_MATCH(DMI_PRODUCT_NAME
, "eserver xSeries 440"),
1538 * Boxes that need ACPI PCI IRQ routing disabled
1541 .callback
= disable_acpi_irq
,
1542 .ident
= "ASUS A7V",
1544 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC"),
1545 DMI_MATCH(DMI_BOARD_NAME
, "<A7V>"),
1546 /* newer BIOS, Revision 1011, does work */
1547 DMI_MATCH(DMI_BIOS_VERSION
,
1548 "ASUS A7V ACPI BIOS Revision 1007"),
1553 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1554 * for LPC bridge, which is needed for the PCI
1555 * interrupt links to work. DSDT fix is in bug 5966.
1556 * 2645, 2646 model numbers are shared with 600/600E/600X
1558 .callback
= disable_acpi_irq
,
1559 .ident
= "IBM Thinkpad 600 Series 2645",
1561 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1562 DMI_MATCH(DMI_BOARD_NAME
, "2645"),
1566 .callback
= disable_acpi_irq
,
1567 .ident
= "IBM Thinkpad 600 Series 2646",
1569 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1570 DMI_MATCH(DMI_BOARD_NAME
, "2646"),
1574 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1577 .callback
= disable_acpi_pci
,
1578 .ident
= "ASUS PR-DLS",
1580 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1581 DMI_MATCH(DMI_BOARD_NAME
, "PR-DLS"),
1582 DMI_MATCH(DMI_BIOS_VERSION
,
1583 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1584 DMI_MATCH(DMI_BIOS_DATE
, "03/21/2003")
1588 .callback
= disable_acpi_pci
,
1589 .ident
= "Acer TravelMate 36x Laptop",
1591 DMI_MATCH(DMI_SYS_VENDOR
, "Acer"),
1592 DMI_MATCH(DMI_PRODUCT_NAME
, "TravelMate 360"),
1596 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1597 * which includes some code which overrides all temperature
1598 * trip points to 16C if the INTIN2 input of the I/O APIC
1599 * is enabled. This input is incorrectly designated the
1600 * ISA IRQ 0 via an interrupt source override even though
1601 * it is wired to the output of the master 8259A and INTIN0
1602 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1603 * override in that cases.
1606 .callback
= dmi_ignore_irq0_timer_override
,
1607 .ident
= "HP NX6125 laptop",
1609 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1610 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq nx6125"),
1614 .callback
= dmi_ignore_irq0_timer_override
,
1615 .ident
= "HP NX6325 laptop",
1617 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1618 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq nx6325"),
1625 * acpi_boot_table_init() and acpi_boot_init()
1626 * called from setup_arch(), always.
1627 * 1. checksums all tables
1628 * 2. enumerates lapics
1629 * 3. enumerates io-apics
1631 * acpi_table_init() is separate to allow reading SRAT without
1632 * other side effects.
1634 * side effects of acpi_boot_init:
1635 * acpi_lapic = 1 if LAPIC found
1636 * acpi_ioapic = 1 if IOAPIC found
1637 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1638 * if acpi_blacklisted() acpi_disabled = 1;
1639 * acpi_irq_model=...
1642 * return value: (currently ignored)
1647 int __init
acpi_boot_table_init(void)
1651 dmi_check_system(acpi_dmi_table
);
1654 * If acpi_disabled, bail out
1655 * One exception: acpi=ht continues far enough to enumerate LAPICs
1657 if (acpi_disabled
&& !acpi_ht
)
1661 * Initialize the ACPI boot-time table parser.
1663 error
= acpi_table_init();
1669 acpi_table_parse(ACPI_SIG_BOOT
, acpi_parse_sbf
);
1672 * blacklist may disable ACPI entirely
1674 error
= acpi_blacklisted();
1677 printk(KERN_WARNING PREFIX
"acpi=force override\n");
1679 printk(KERN_WARNING PREFIX
"Disabling ACPI support\n");
1688 int __init
early_acpi_boot_init(void)
1691 * If acpi_disabled, bail out
1692 * One exception: acpi=ht continues far enough to enumerate LAPICs
1694 if (acpi_disabled
&& !acpi_ht
)
1698 * Process the Multiple APIC Description Table (MADT), if present
1700 early_acpi_process_madt();
1705 int __init
acpi_boot_init(void)
1708 * If acpi_disabled, bail out
1709 * One exception: acpi=ht continues far enough to enumerate LAPICs
1711 if (acpi_disabled
&& !acpi_ht
)
1714 acpi_table_parse(ACPI_SIG_BOOT
, acpi_parse_sbf
);
1717 * set sci_int and PM timer address
1719 acpi_table_parse(ACPI_SIG_FADT
, acpi_parse_fadt
);
1722 * Process the Multiple APIC Description Table (MADT), if present
1724 acpi_process_madt();
1726 acpi_table_parse(ACPI_SIG_HPET
, acpi_parse_hpet
);
1731 static int __init
parse_acpi(char *arg
)
1736 /* "acpi=off" disables both ACPI table parsing and interpreter */
1737 if (strcmp(arg
, "off") == 0) {
1740 /* acpi=force to over-ride black-list */
1741 else if (strcmp(arg
, "force") == 0) {
1746 /* acpi=strict disables out-of-spec workarounds */
1747 else if (strcmp(arg
, "strict") == 0) {
1750 /* Limit ACPI just to boot-time to enable HT */
1751 else if (strcmp(arg
, "ht") == 0) {
1756 /* "acpi=noirq" disables ACPI interrupt routing */
1757 else if (strcmp(arg
, "noirq") == 0) {
1760 /* Core will printk when we return error. */
1765 early_param("acpi", parse_acpi
);
1767 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1768 static int __init
parse_pci(char *arg
)
1770 if (arg
&& strcmp(arg
, "noacpi") == 0)
1774 early_param("pci", parse_pci
);
1776 int __init
acpi_mps_check(void)
1778 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1779 /* mptable code is not built-in*/
1780 if (acpi_disabled
|| acpi_noirq
) {
1781 printk(KERN_WARNING
"MPS support code is not built-in.\n"
1782 "Using acpi=off or acpi=noirq or pci=noacpi "
1783 "may have problem\n");
1790 #ifdef CONFIG_X86_IO_APIC
1791 static int __init
parse_acpi_skip_timer_override(char *arg
)
1793 acpi_skip_timer_override
= 1;
1796 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override
);
1798 static int __init
parse_acpi_use_timer_override(char *arg
)
1800 acpi_use_timer_override
= 1;
1803 early_param("acpi_use_timer_override", parse_acpi_use_timer_override
);
1804 #endif /* CONFIG_X86_IO_APIC */
1806 static int __init
setup_acpi_sci(char *s
)
1810 if (!strcmp(s
, "edge"))
1811 acpi_sci_flags
= ACPI_MADT_TRIGGER_EDGE
|
1812 (acpi_sci_flags
& ~ACPI_MADT_TRIGGER_MASK
);
1813 else if (!strcmp(s
, "level"))
1814 acpi_sci_flags
= ACPI_MADT_TRIGGER_LEVEL
|
1815 (acpi_sci_flags
& ~ACPI_MADT_TRIGGER_MASK
);
1816 else if (!strcmp(s
, "high"))
1817 acpi_sci_flags
= ACPI_MADT_POLARITY_ACTIVE_HIGH
|
1818 (acpi_sci_flags
& ~ACPI_MADT_POLARITY_MASK
);
1819 else if (!strcmp(s
, "low"))
1820 acpi_sci_flags
= ACPI_MADT_POLARITY_ACTIVE_LOW
|
1821 (acpi_sci_flags
& ~ACPI_MADT_POLARITY_MASK
);
1826 early_param("acpi_sci", setup_acpi_sci
);
1828 int __acpi_acquire_global_lock(unsigned int *lock
)
1830 unsigned int old
, new, val
;
1833 new = (((old
& ~0x3) + 2) + ((old
>> 1) & 0x1));
1834 val
= cmpxchg(lock
, old
, new);
1835 } while (unlikely (val
!= old
));
1836 return (new < 3) ? -1 : 0;
1839 int __acpi_release_global_lock(unsigned int *lock
)
1841 unsigned int old
, new, val
;
1845 val
= cmpxchg(lock
, old
, new);
1846 } while (unlikely (val
!= old
));