2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
26 #include <linux/init.h>
27 #include <linux/acpi.h>
28 #include <linux/efi.h>
29 #include <linux/cpumask.h>
30 #include <linux/module.h>
31 #include <linux/dmi.h>
32 #include <linux/irq.h>
33 #include <linux/bootmem.h>
34 #include <linux/ioport.h>
36 #include <asm/pgtable.h>
37 #include <asm/io_apic.h>
40 #include <asm/mpspec.h>
42 static int __initdata acpi_force
= 0;
45 int acpi_disabled
= 0;
47 int acpi_disabled
= 1;
49 EXPORT_SYMBOL(acpi_disabled
);
53 #include <asm/proto.h>
55 static inline int acpi_madt_oem_check(char *oem_id
, char *oem_table_id
) { return 0; }
60 #ifdef CONFIG_X86_LOCAL_APIC
61 #include <mach_apic.h>
62 #include <mach_mpparse.h>
63 #endif /* CONFIG_X86_LOCAL_APIC */
67 #define BAD_MADT_ENTRY(entry, end) ( \
68 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
69 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
71 #define PREFIX "ACPI: "
73 int acpi_noirq
; /* skip ACPI IRQ initialization */
74 int acpi_pci_disabled __initdata
; /* skip ACPI PCI scan and IRQ initialization */
75 int acpi_ht __initdata
= 1; /* enable HT */
80 EXPORT_SYMBOL(acpi_strict
);
82 u8 acpi_sci_flags __initdata
;
83 int acpi_sci_override_gsi __initdata
;
84 int acpi_skip_timer_override __initdata
;
85 int acpi_use_timer_override __initdata
;
87 #ifdef CONFIG_X86_LOCAL_APIC
88 static u64 acpi_lapic_addr __initdata
= APIC_DEFAULT_PHYS_BASE
;
91 #ifndef __HAVE_ARCH_CMPXCHG
92 #warning ACPI uses CMPXCHG, i486 and later hardware
95 /* --------------------------------------------------------------------------
96 Boot-time Configuration
97 -------------------------------------------------------------------------- */
100 * The default interrupt routing model is PIC (8259). This gets
101 * overriden if IOAPICs are enumerated (below).
103 enum acpi_irq_model_id acpi_irq_model
= ACPI_IRQ_MODEL_PIC
;
107 /* rely on all ACPI tables being in the direct mapping */
108 char *__acpi_map_table(unsigned long phys_addr
, unsigned long size
)
110 if (!phys_addr
|| !size
)
113 if (phys_addr
+size
<= (end_pfn_map
<< PAGE_SHIFT
) + PAGE_SIZE
)
114 return __va(phys_addr
);
122 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
123 * to map the target physical address. The problem is that set_fixmap()
124 * provides a single page, and it is possible that the page is not
126 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
127 * i.e. until the next __va_range() call.
129 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
130 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
131 * count idx down while incrementing the phys address.
133 char *__acpi_map_table(unsigned long phys
, unsigned long size
)
135 unsigned long base
, offset
, mapped_size
;
138 if (phys
+ size
< 8 * 1024 * 1024)
141 offset
= phys
& (PAGE_SIZE
- 1);
142 mapped_size
= PAGE_SIZE
- offset
;
143 set_fixmap(FIX_ACPI_END
, phys
);
144 base
= fix_to_virt(FIX_ACPI_END
);
147 * Most cases can be covered by the below.
150 while (mapped_size
< size
) {
151 if (--idx
< FIX_ACPI_BEGIN
)
152 return NULL
; /* cannot handle this */
154 set_fixmap(idx
, phys
);
155 mapped_size
+= PAGE_SIZE
;
158 return ((unsigned char *)base
+ offset
);
162 #ifdef CONFIG_PCI_MMCONFIG
163 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
164 struct acpi_mcfg_allocation
*pci_mmcfg_config
;
165 int pci_mmcfg_config_num
;
167 int __init
acpi_parse_mcfg(struct acpi_table_header
*header
)
169 struct acpi_table_mcfg
*mcfg
;
176 mcfg
= (struct acpi_table_mcfg
*)header
;
178 /* how many config structures do we have */
179 pci_mmcfg_config_num
= 0;
180 i
= header
->length
- sizeof(struct acpi_table_mcfg
);
181 while (i
>= sizeof(struct acpi_mcfg_allocation
)) {
182 ++pci_mmcfg_config_num
;
183 i
-= sizeof(struct acpi_mcfg_allocation
);
185 if (pci_mmcfg_config_num
== 0) {
186 printk(KERN_ERR PREFIX
"MMCONFIG has no entries\n");
190 config_size
= pci_mmcfg_config_num
* sizeof(*pci_mmcfg_config
);
191 pci_mmcfg_config
= kmalloc(config_size
, GFP_KERNEL
);
192 if (!pci_mmcfg_config
) {
193 printk(KERN_WARNING PREFIX
194 "No memory for MCFG config tables\n");
198 memcpy(pci_mmcfg_config
, &mcfg
[1], config_size
);
199 for (i
= 0; i
< pci_mmcfg_config_num
; ++i
) {
200 if (pci_mmcfg_config
[i
].address
> 0xFFFFFFFF) {
201 printk(KERN_ERR PREFIX
202 "MMCONFIG not in low 4GB of memory\n");
203 kfree(pci_mmcfg_config
);
204 pci_mmcfg_config_num
= 0;
211 #endif /* CONFIG_PCI_MMCONFIG */
213 #ifdef CONFIG_X86_LOCAL_APIC
214 static int __init
acpi_parse_madt(struct acpi_table_header
*table
)
216 struct acpi_table_madt
*madt
= NULL
;
221 madt
= (struct acpi_table_madt
*)table
;
223 printk(KERN_WARNING PREFIX
"Unable to map MADT\n");
228 acpi_lapic_addr
= (u64
) madt
->address
;
230 printk(KERN_DEBUG PREFIX
"Local APIC address 0x%08x\n",
234 acpi_madt_oem_check(madt
->header
.oem_id
, madt
->header
.oem_table_id
);
240 acpi_parse_lapic(struct acpi_subtable_header
* header
, const unsigned long end
)
242 struct acpi_madt_local_apic
*processor
= NULL
;
244 processor
= (struct acpi_madt_local_apic
*)header
;
246 if (BAD_MADT_ENTRY(processor
, end
))
249 acpi_table_print_madt_entry(header
);
252 * We need to register disabled CPU as well to permit
253 * counting disabled CPUs. This allows us to size
254 * cpus_possible_map more accurately, to permit
255 * to not preallocating memory for all NR_CPUS
256 * when we use CPU hotplug.
258 mp_register_lapic(processor
->id
, /* APIC ID */
259 processor
->lapic_flags
& ACPI_MADT_ENABLED
); /* Enabled? */
265 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header
* header
,
266 const unsigned long end
)
268 struct acpi_madt_local_apic_override
*lapic_addr_ovr
= NULL
;
270 lapic_addr_ovr
= (struct acpi_madt_local_apic_override
*)header
;
272 if (BAD_MADT_ENTRY(lapic_addr_ovr
, end
))
275 acpi_lapic_addr
= lapic_addr_ovr
->address
;
281 acpi_parse_lapic_nmi(struct acpi_subtable_header
* header
, const unsigned long end
)
283 struct acpi_madt_local_apic_nmi
*lapic_nmi
= NULL
;
285 lapic_nmi
= (struct acpi_madt_local_apic_nmi
*)header
;
287 if (BAD_MADT_ENTRY(lapic_nmi
, end
))
290 acpi_table_print_madt_entry(header
);
292 if (lapic_nmi
->lint
!= 1)
293 printk(KERN_WARNING PREFIX
"NMI not connected to LINT 1!\n");
298 #endif /*CONFIG_X86_LOCAL_APIC */
300 #ifdef CONFIG_X86_IO_APIC
303 acpi_parse_ioapic(struct acpi_subtable_header
* header
, const unsigned long end
)
305 struct acpi_madt_io_apic
*ioapic
= NULL
;
307 ioapic
= (struct acpi_madt_io_apic
*)header
;
309 if (BAD_MADT_ENTRY(ioapic
, end
))
312 acpi_table_print_madt_entry(header
);
314 mp_register_ioapic(ioapic
->id
,
315 ioapic
->address
, ioapic
->global_irq_base
);
321 * Parse Interrupt Source Override for the ACPI SCI
323 static void __init
acpi_sci_ioapic_setup(u32 gsi
, u16 polarity
, u16 trigger
)
325 if (trigger
== 0) /* compatible SCI trigger is level */
328 if (polarity
== 0) /* compatible SCI polarity is low */
331 /* Command-line over-ride via acpi_sci= */
332 if (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
)
333 trigger
= (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2;
335 if (acpi_sci_flags
& ACPI_MADT_POLARITY_MASK
)
336 polarity
= acpi_sci_flags
& ACPI_MADT_POLARITY_MASK
;
339 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
340 * If GSI is < 16, this will update its flags,
341 * else it will create a new mp_irqs[] entry.
343 mp_override_legacy_irq(gsi
, polarity
, trigger
, gsi
);
346 * stash over-ride to indicate we've been here
347 * and for later update of acpi_gbl_FADT
349 acpi_sci_override_gsi
= gsi
;
354 acpi_parse_int_src_ovr(struct acpi_subtable_header
* header
,
355 const unsigned long end
)
357 struct acpi_madt_interrupt_override
*intsrc
= NULL
;
359 intsrc
= (struct acpi_madt_interrupt_override
*)header
;
361 if (BAD_MADT_ENTRY(intsrc
, end
))
364 acpi_table_print_madt_entry(header
);
366 if (intsrc
->source_irq
== acpi_gbl_FADT
.sci_interrupt
) {
367 acpi_sci_ioapic_setup(intsrc
->global_irq
,
368 intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
,
369 (intsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2);
373 if (acpi_skip_timer_override
&&
374 intsrc
->source_irq
== 0 && intsrc
->global_irq
== 2) {
375 printk(PREFIX
"BIOS IRQ0 pin2 override ignored.\n");
379 mp_override_legacy_irq(intsrc
->source_irq
,
380 intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
,
381 (intsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2,
388 acpi_parse_nmi_src(struct acpi_subtable_header
* header
, const unsigned long end
)
390 struct acpi_madt_nmi_source
*nmi_src
= NULL
;
392 nmi_src
= (struct acpi_madt_nmi_source
*)header
;
394 if (BAD_MADT_ENTRY(nmi_src
, end
))
397 acpi_table_print_madt_entry(header
);
399 /* TBD: Support nimsrc entries? */
404 #endif /* CONFIG_X86_IO_APIC */
407 * acpi_pic_sci_set_trigger()
409 * use ELCR to set PIC-mode trigger type for SCI
411 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
412 * it may require Edge Trigger -- use "acpi_sci=edge"
414 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
415 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
416 * ECLR1 is IRQ's 0-7 (IRQ 0, 1, 2 must be 0)
417 * ECLR2 is IRQ's 8-15 (IRQ 8, 13 must be 0)
420 void __init
acpi_pic_sci_set_trigger(unsigned int irq
, u16 trigger
)
422 unsigned int mask
= 1 << irq
;
423 unsigned int old
, new;
425 /* Real old ELCR mask */
426 old
= inb(0x4d0) | (inb(0x4d1) << 8);
429 * If we use ACPI to set PCI irq's, then we should clear ELCR
430 * since we will set it correctly as we enable the PCI irq
433 new = acpi_noirq
? old
: 0;
436 * Update SCI information in the ELCR, it isn't in the PCI
440 case 1: /* Edge - clear */
443 case 3: /* Level - set */
451 printk(PREFIX
"setting ELCR to %04x (from %04x)\n", new, old
);
453 outb(new >> 8, 0x4d1);
456 int acpi_gsi_to_irq(u32 gsi
, unsigned int *irq
)
463 * success: return IRQ number (>=0)
464 * failure: return < 0
466 int acpi_register_gsi(u32 gsi
, int triggering
, int polarity
)
469 unsigned int plat_gsi
= gsi
;
473 * Make sure all (legacy) PCI IRQs are set as level-triggered.
475 if (acpi_irq_model
== ACPI_IRQ_MODEL_PIC
) {
476 extern void eisa_set_level_irq(unsigned int irq
);
478 if (triggering
== ACPI_LEVEL_SENSITIVE
)
479 eisa_set_level_irq(gsi
);
483 #ifdef CONFIG_X86_IO_APIC
484 if (acpi_irq_model
== ACPI_IRQ_MODEL_IOAPIC
) {
485 plat_gsi
= mp_register_gsi(gsi
, triggering
, polarity
);
488 acpi_gsi_to_irq(plat_gsi
, &irq
);
492 EXPORT_SYMBOL(acpi_register_gsi
);
495 * ACPI based hotplug support for CPU
497 #ifdef CONFIG_ACPI_HOTPLUG_CPU
498 int acpi_map_lsapic(acpi_handle handle
, int *pcpu
)
500 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
501 union acpi_object
*obj
;
502 struct acpi_madt_local_apic
*lapic
;
503 cpumask_t tmp_map
, new_map
;
507 if (ACPI_FAILURE(acpi_evaluate_object(handle
, "_MAT", NULL
, &buffer
)))
510 if (!buffer
.length
|| !buffer
.pointer
)
513 obj
= buffer
.pointer
;
514 if (obj
->type
!= ACPI_TYPE_BUFFER
||
515 obj
->buffer
.length
< sizeof(*lapic
)) {
516 kfree(buffer
.pointer
);
520 lapic
= (struct acpi_madt_local_apic
*)obj
->buffer
.pointer
;
522 if (lapic
->header
.type
!= ACPI_MADT_TYPE_LOCAL_APIC
||
523 !(lapic
->lapic_flags
& ACPI_MADT_ENABLED
)) {
524 kfree(buffer
.pointer
);
530 kfree(buffer
.pointer
);
531 buffer
.length
= ACPI_ALLOCATE_BUFFER
;
532 buffer
.pointer
= NULL
;
534 tmp_map
= cpu_present_map
;
535 mp_register_lapic(physid
, lapic
->lapic_flags
& ACPI_MADT_ENABLED
);
538 * If mp_register_lapic successfully generates a new logical cpu
539 * number, then the following will get us exactly what was mapped
541 cpus_andnot(new_map
, cpu_present_map
, tmp_map
);
542 if (cpus_empty(new_map
)) {
543 printk ("Unable to map lapic to logical cpu number\n");
547 cpu
= first_cpu(new_map
);
553 EXPORT_SYMBOL(acpi_map_lsapic
);
555 int acpi_unmap_lsapic(int cpu
)
557 x86_cpu_to_apicid
[cpu
] = -1;
558 cpu_clear(cpu
, cpu_present_map
);
564 EXPORT_SYMBOL(acpi_unmap_lsapic
);
565 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
567 int acpi_register_ioapic(acpi_handle handle
, u64 phys_addr
, u32 gsi_base
)
573 EXPORT_SYMBOL(acpi_register_ioapic
);
575 int acpi_unregister_ioapic(acpi_handle handle
, u32 gsi_base
)
581 EXPORT_SYMBOL(acpi_unregister_ioapic
);
583 static unsigned long __init
584 acpi_scan_rsdp(unsigned long start
, unsigned long length
)
586 unsigned long offset
= 0;
587 unsigned long sig_len
= sizeof("RSD PTR ") - 1;
590 * Scan all 16-byte boundaries of the physical memory region for the
593 for (offset
= 0; offset
< length
; offset
+= 16) {
594 if (strncmp((char *)(phys_to_virt(start
) + offset
), "RSD PTR ", sig_len
))
596 return (start
+ offset
);
602 static int __init
acpi_parse_sbf(struct acpi_table_header
*table
)
604 struct acpi_table_boot
*sb
;
606 sb
= (struct acpi_table_boot
*)table
;
608 printk(KERN_WARNING PREFIX
"Unable to map SBF\n");
612 sbf_port
= sb
->cmos_index
; /* Save CMOS port */
617 #ifdef CONFIG_HPET_TIMER
619 static int __init
acpi_parse_hpet(struct acpi_table_header
*table
)
621 struct acpi_table_hpet
*hpet_tbl
;
622 struct resource
*hpet_res
;
623 resource_size_t res_start
;
625 hpet_tbl
= (struct acpi_table_hpet
*)table
;
627 printk(KERN_WARNING PREFIX
"Unable to map HPET\n");
631 if (hpet_tbl
->address
.space_id
!= ACPI_SPACE_MEM
) {
632 printk(KERN_WARNING PREFIX
"HPET timers must be located in "
637 #define HPET_RESOURCE_NAME_SIZE 9
638 hpet_res
= alloc_bootmem(sizeof(*hpet_res
) + HPET_RESOURCE_NAME_SIZE
);
640 memset(hpet_res
, 0, sizeof(*hpet_res
));
641 hpet_res
->name
= (void *)&hpet_res
[1];
642 hpet_res
->flags
= IORESOURCE_MEM
| IORESOURCE_BUSY
;
643 snprintf((char *)hpet_res
->name
, HPET_RESOURCE_NAME_SIZE
,
644 "HPET %u", hpet_tbl
->sequence
);
645 hpet_res
->end
= (1 * 1024) - 1;
649 vxtime
.hpet_address
= hpet_tbl
->address
.address
;
651 printk(KERN_INFO PREFIX
"HPET id: %#x base: %#lx\n",
652 hpet_tbl
->id
, vxtime
.hpet_address
);
654 res_start
= vxtime
.hpet_address
;
657 extern unsigned long hpet_address
;
659 hpet_address
= hpet_tbl
->address
.address
;
660 printk(KERN_INFO PREFIX
"HPET id: %#x base: %#lx\n",
661 hpet_tbl
->id
, hpet_address
);
663 res_start
= hpet_address
;
668 hpet_res
->start
= res_start
;
669 hpet_res
->end
+= res_start
;
670 insert_resource(&iomem_resource
, hpet_res
);
676 #define acpi_parse_hpet NULL
679 #ifdef CONFIG_X86_PM_TIMER
680 extern u32 pmtmr_ioport
;
683 static int __init
acpi_parse_fadt(struct acpi_table_header
*table
)
686 #ifdef CONFIG_X86_PM_TIMER
687 /* detect the location of the ACPI PM Timer */
688 if (acpi_gbl_FADT
.header
.revision
>= FADT2_REVISION_ID
) {
690 if (acpi_gbl_FADT
.xpm_timer_block
.space_id
!=
691 ACPI_ADR_SPACE_SYSTEM_IO
)
694 pmtmr_ioport
= acpi_gbl_FADT
.xpm_timer_block
.address
;
696 * "X" fields are optional extensions to the original V1.0
697 * fields, so we must selectively expand V1.0 fields if the
698 * corresponding X field is zero.
701 pmtmr_ioport
= acpi_gbl_FADT
.pm_timer_block
;
704 pmtmr_ioport
= acpi_gbl_FADT
.pm_timer_block
;
707 printk(KERN_INFO PREFIX
"PM-Timer IO Port: %#x\n",
713 unsigned long __init
acpi_find_rsdp(void)
715 unsigned long rsdp_phys
= 0;
718 if (efi
.acpi20
!= EFI_INVALID_TABLE_ADDR
)
720 else if (efi
.acpi
!= EFI_INVALID_TABLE_ADDR
)
724 * Scan memory looking for the RSDP signature. First search EBDA (low
725 * memory) paragraphs and then search upper memory (E0000-FFFFF).
727 rsdp_phys
= acpi_scan_rsdp(0, 0x400);
729 rsdp_phys
= acpi_scan_rsdp(0xE0000, 0x20000);
734 #ifdef CONFIG_X86_LOCAL_APIC
736 * Parse LAPIC entries in MADT
737 * returns 0 on success, < 0 on error
739 static int __init
acpi_parse_madt_lapic_entries(void)
747 * Note that the LAPIC address is obtained from the MADT (32-bit value)
748 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
752 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE
,
753 acpi_parse_lapic_addr_ovr
, 0);
755 printk(KERN_ERR PREFIX
756 "Error parsing LAPIC address override entry\n");
760 mp_register_lapic_address(acpi_lapic_addr
);
762 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC
, acpi_parse_lapic
,
765 printk(KERN_ERR PREFIX
"No LAPIC entries present\n");
766 /* TBD: Cleanup to allow fallback to MPS */
768 } else if (count
< 0) {
769 printk(KERN_ERR PREFIX
"Error parsing LAPIC entry\n");
770 /* TBD: Cleanup to allow fallback to MPS */
775 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI
, acpi_parse_lapic_nmi
, 0);
777 printk(KERN_ERR PREFIX
"Error parsing LAPIC NMI entry\n");
778 /* TBD: Cleanup to allow fallback to MPS */
783 #endif /* CONFIG_X86_LOCAL_APIC */
785 #ifdef CONFIG_X86_IO_APIC
787 * Parse IOAPIC related entries in MADT
788 * returns 0 on success, < 0 on error
790 static int __init
acpi_parse_madt_ioapic_entries(void)
795 * ACPI interpreter is required to complete interrupt setup,
796 * so if it is off, don't enumerate the io-apics with ACPI.
797 * If MPS is present, it will handle them,
798 * otherwise the system will stay in PIC mode
800 if (acpi_disabled
|| acpi_noirq
) {
808 * if "noapic" boot option, don't look for IO-APICs
810 if (skip_ioapic_setup
) {
811 printk(KERN_INFO PREFIX
"Skipping IOAPIC probe "
812 "due to 'noapic' option.\n");
817 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC
, acpi_parse_ioapic
,
820 printk(KERN_ERR PREFIX
"No IOAPIC entries present\n");
822 } else if (count
< 0) {
823 printk(KERN_ERR PREFIX
"Error parsing IOAPIC entry\n");
828 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE
, acpi_parse_int_src_ovr
,
831 printk(KERN_ERR PREFIX
832 "Error parsing interrupt source overrides entry\n");
833 /* TBD: Cleanup to allow fallback to MPS */
838 * If BIOS did not supply an INT_SRC_OVR for the SCI
839 * pretend we got one so we can set the SCI flags.
841 if (!acpi_sci_override_gsi
)
842 acpi_sci_ioapic_setup(acpi_gbl_FADT
.sci_interrupt
, 0, 0);
844 /* Fill in identity legacy mapings where no override */
845 mp_config_acpi_legacy_irqs();
848 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE
, acpi_parse_nmi_src
,
851 printk(KERN_ERR PREFIX
"Error parsing NMI SRC entry\n");
852 /* TBD: Cleanup to allow fallback to MPS */
859 static inline int acpi_parse_madt_ioapic_entries(void)
863 #endif /* !CONFIG_X86_IO_APIC */
865 static void __init
acpi_process_madt(void)
867 #ifdef CONFIG_X86_LOCAL_APIC
870 count
= acpi_table_parse(ACPI_SIG_MADT
, acpi_parse_madt
);
874 * Parse MADT LAPIC entries
876 error
= acpi_parse_madt_lapic_entries();
880 #ifdef CONFIG_X86_GENERICARCH
881 generic_bigsmp_probe();
884 * Parse MADT IO-APIC entries
886 error
= acpi_parse_madt_ioapic_entries();
888 acpi_irq_model
= ACPI_IRQ_MODEL_IOAPIC
;
889 acpi_irq_balance_set(NULL
);
892 smp_found_config
= 1;
893 clustered_apic_check();
896 if (error
== -EINVAL
) {
898 * Dell Precision Workstation 410, 610 come here.
900 printk(KERN_ERR PREFIX
901 "Invalid BIOS MADT, disabling ACPI\n");
911 static int __init
disable_acpi_irq(struct dmi_system_id
*d
)
914 printk(KERN_NOTICE
"%s detected: force use of acpi=noirq\n",
921 static int __init
disable_acpi_pci(struct dmi_system_id
*d
)
924 printk(KERN_NOTICE
"%s detected: force use of pci=noacpi\n",
931 static int __init
dmi_disable_acpi(struct dmi_system_id
*d
)
934 printk(KERN_NOTICE
"%s detected: acpi off\n", d
->ident
);
938 "Warning: DMI blacklist says broken, but acpi forced\n");
944 * Limit ACPI to CPU enumeration for HT
946 static int __init
force_acpi_ht(struct dmi_system_id
*d
)
949 printk(KERN_NOTICE
"%s detected: force use of acpi=ht\n",
955 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
961 * If your system is blacklisted here, but you find that acpi=force
962 * works for you, please contact acpi-devel@sourceforge.net
964 static struct dmi_system_id __initdata acpi_dmi_table
[] = {
966 * Boxes that need ACPI disabled
969 .callback
= dmi_disable_acpi
,
970 .ident
= "IBM Thinkpad",
972 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
973 DMI_MATCH(DMI_BOARD_NAME
, "2629H1G"),
978 * Boxes that need acpi=ht
981 .callback
= force_acpi_ht
,
982 .ident
= "FSC Primergy T850",
984 DMI_MATCH(DMI_SYS_VENDOR
, "FUJITSU SIEMENS"),
985 DMI_MATCH(DMI_PRODUCT_NAME
, "PRIMERGY T850"),
989 .callback
= force_acpi_ht
,
990 .ident
= "DELL GX240",
992 DMI_MATCH(DMI_BOARD_VENDOR
, "Dell Computer Corporation"),
993 DMI_MATCH(DMI_BOARD_NAME
, "OptiPlex GX240"),
997 .callback
= force_acpi_ht
,
998 .ident
= "HP VISUALIZE NT Workstation",
1000 DMI_MATCH(DMI_BOARD_VENDOR
, "Hewlett-Packard"),
1001 DMI_MATCH(DMI_PRODUCT_NAME
, "HP VISUALIZE NT Workstation"),
1005 .callback
= force_acpi_ht
,
1006 .ident
= "Compaq Workstation W8000",
1008 DMI_MATCH(DMI_SYS_VENDOR
, "Compaq"),
1009 DMI_MATCH(DMI_PRODUCT_NAME
, "Workstation W8000"),
1013 .callback
= force_acpi_ht
,
1014 .ident
= "ASUS P4B266",
1016 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1017 DMI_MATCH(DMI_BOARD_NAME
, "P4B266"),
1021 .callback
= force_acpi_ht
,
1022 .ident
= "ASUS P2B-DS",
1024 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1025 DMI_MATCH(DMI_BOARD_NAME
, "P2B-DS"),
1029 .callback
= force_acpi_ht
,
1030 .ident
= "ASUS CUR-DLS",
1032 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1033 DMI_MATCH(DMI_BOARD_NAME
, "CUR-DLS"),
1037 .callback
= force_acpi_ht
,
1038 .ident
= "ABIT i440BX-W83977",
1040 DMI_MATCH(DMI_BOARD_VENDOR
, "ABIT <http://www.abit.com>"),
1041 DMI_MATCH(DMI_BOARD_NAME
, "i440BX-W83977 (BP6)"),
1045 .callback
= force_acpi_ht
,
1046 .ident
= "IBM Bladecenter",
1048 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1049 DMI_MATCH(DMI_BOARD_NAME
, "IBM eServer BladeCenter HS20"),
1053 .callback
= force_acpi_ht
,
1054 .ident
= "IBM eServer xSeries 360",
1056 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1057 DMI_MATCH(DMI_BOARD_NAME
, "eServer xSeries 360"),
1061 .callback
= force_acpi_ht
,
1062 .ident
= "IBM eserver xSeries 330",
1064 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1065 DMI_MATCH(DMI_BOARD_NAME
, "eserver xSeries 330"),
1069 .callback
= force_acpi_ht
,
1070 .ident
= "IBM eserver xSeries 440",
1072 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1073 DMI_MATCH(DMI_PRODUCT_NAME
, "eserver xSeries 440"),
1078 * Boxes that need ACPI PCI IRQ routing disabled
1081 .callback
= disable_acpi_irq
,
1082 .ident
= "ASUS A7V",
1084 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC"),
1085 DMI_MATCH(DMI_BOARD_NAME
, "<A7V>"),
1086 /* newer BIOS, Revision 1011, does work */
1087 DMI_MATCH(DMI_BIOS_VERSION
,
1088 "ASUS A7V ACPI BIOS Revision 1007"),
1093 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1096 .callback
= disable_acpi_pci
,
1097 .ident
= "ASUS PR-DLS",
1099 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1100 DMI_MATCH(DMI_BOARD_NAME
, "PR-DLS"),
1101 DMI_MATCH(DMI_BIOS_VERSION
,
1102 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1103 DMI_MATCH(DMI_BIOS_DATE
, "03/21/2003")
1107 .callback
= disable_acpi_pci
,
1108 .ident
= "Acer TravelMate 36x Laptop",
1110 DMI_MATCH(DMI_SYS_VENDOR
, "Acer"),
1111 DMI_MATCH(DMI_PRODUCT_NAME
, "TravelMate 360"),
1117 #endif /* __i386__ */
1120 * acpi_boot_table_init() and acpi_boot_init()
1121 * called from setup_arch(), always.
1122 * 1. checksums all tables
1123 * 2. enumerates lapics
1124 * 3. enumerates io-apics
1126 * acpi_table_init() is separate to allow reading SRAT without
1127 * other side effects.
1129 * side effects of acpi_boot_init:
1130 * acpi_lapic = 1 if LAPIC found
1131 * acpi_ioapic = 1 if IOAPIC found
1132 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1133 * if acpi_blacklisted() acpi_disabled = 1;
1134 * acpi_irq_model=...
1137 * return value: (currently ignored)
1142 int __init
acpi_boot_table_init(void)
1147 dmi_check_system(acpi_dmi_table
);
1151 * If acpi_disabled, bail out
1152 * One exception: acpi=ht continues far enough to enumerate LAPICs
1154 if (acpi_disabled
&& !acpi_ht
)
1158 * Initialize the ACPI boot-time table parser.
1160 error
= acpi_table_init();
1166 acpi_table_parse(ACPI_SIG_BOOT
, acpi_parse_sbf
);
1169 * blacklist may disable ACPI entirely
1171 error
= acpi_blacklisted();
1174 printk(KERN_WARNING PREFIX
"acpi=force override\n");
1176 printk(KERN_WARNING PREFIX
"Disabling ACPI support\n");
1185 int __init
acpi_boot_init(void)
1188 * If acpi_disabled, bail out
1189 * One exception: acpi=ht continues far enough to enumerate LAPICs
1191 if (acpi_disabled
&& !acpi_ht
)
1194 acpi_table_parse(ACPI_SIG_BOOT
, acpi_parse_sbf
);
1197 * set sci_int and PM timer address
1199 acpi_table_parse(ACPI_SIG_FADT
, acpi_parse_fadt
);
1202 * Process the Multiple APIC Description Table (MADT), if present
1204 acpi_process_madt();
1206 acpi_table_parse(ACPI_SIG_HPET
, acpi_parse_hpet
);
1211 static int __init
parse_acpi(char *arg
)
1216 /* "acpi=off" disables both ACPI table parsing and interpreter */
1217 if (strcmp(arg
, "off") == 0) {
1220 /* acpi=force to over-ride black-list */
1221 else if (strcmp(arg
, "force") == 0) {
1226 /* acpi=strict disables out-of-spec workarounds */
1227 else if (strcmp(arg
, "strict") == 0) {
1230 /* Limit ACPI just to boot-time to enable HT */
1231 else if (strcmp(arg
, "ht") == 0) {
1236 /* "acpi=noirq" disables ACPI interrupt routing */
1237 else if (strcmp(arg
, "noirq") == 0) {
1240 /* Core will printk when we return error. */
1245 early_param("acpi", parse_acpi
);
1247 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1248 static int __init
parse_pci(char *arg
)
1250 if (arg
&& strcmp(arg
, "noacpi") == 0)
1254 early_param("pci", parse_pci
);
1256 #ifdef CONFIG_X86_IO_APIC
1257 static int __init
parse_acpi_skip_timer_override(char *arg
)
1259 acpi_skip_timer_override
= 1;
1262 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override
);
1264 static int __init
parse_acpi_use_timer_override(char *arg
)
1266 acpi_use_timer_override
= 1;
1269 early_param("acpi_use_timer_override", parse_acpi_use_timer_override
);
1270 #endif /* CONFIG_X86_IO_APIC */
1272 static int __init
setup_acpi_sci(char *s
)
1276 if (!strcmp(s
, "edge"))
1277 acpi_sci_flags
= ACPI_MADT_TRIGGER_EDGE
|
1278 (acpi_sci_flags
& ~ACPI_MADT_TRIGGER_MASK
);
1279 else if (!strcmp(s
, "level"))
1280 acpi_sci_flags
= ACPI_MADT_TRIGGER_LEVEL
|
1281 (acpi_sci_flags
& ~ACPI_MADT_TRIGGER_MASK
);
1282 else if (!strcmp(s
, "high"))
1283 acpi_sci_flags
= ACPI_MADT_POLARITY_ACTIVE_HIGH
|
1284 (acpi_sci_flags
& ~ACPI_MADT_POLARITY_MASK
);
1285 else if (!strcmp(s
, "low"))
1286 acpi_sci_flags
= ACPI_MADT_POLARITY_ACTIVE_LOW
|
1287 (acpi_sci_flags
& ~ACPI_MADT_POLARITY_MASK
);
1292 early_param("acpi_sci", setup_acpi_sci
);
1294 int __acpi_acquire_global_lock(unsigned int *lock
)
1296 unsigned int old
, new, val
;
1299 new = (((old
& ~0x3) + 2) + ((old
>> 1) & 0x1));
1300 val
= cmpxchg(lock
, old
, new);
1301 } while (unlikely (val
!= old
));
1302 return (new < 3) ? -1 : 0;
1305 int __acpi_release_global_lock(unsigned int *lock
)
1307 unsigned int old
, new, val
;
1311 val
= cmpxchg(lock
, old
, new);
1312 } while (unlikely (val
!= old
));