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>
36 #include <linux/pci.h>
38 #include <asm/pgtable.h>
39 #include <asm/io_apic.h>
42 #include <asm/mpspec.h>
45 static int __initdata acpi_force
= 0;
48 EXPORT_SYMBOL(acpi_disabled
);
51 # include <asm/proto.h>
54 #define BAD_MADT_ENTRY(entry, end) ( \
55 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
56 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
58 #define PREFIX "ACPI: "
60 int acpi_noirq
; /* skip ACPI IRQ initialization */
61 int acpi_pci_disabled
; /* skip ACPI PCI scan and IRQ initialization */
62 EXPORT_SYMBOL(acpi_pci_disabled
);
63 int acpi_ht __initdata
= 1; /* enable HT */
69 u8 acpi_sci_flags __initdata
;
70 int acpi_sci_override_gsi __initdata
;
71 int acpi_skip_timer_override __initdata
;
72 int acpi_use_timer_override __initdata
;
74 #ifdef CONFIG_X86_LOCAL_APIC
75 static u64 acpi_lapic_addr __initdata
= APIC_DEFAULT_PHYS_BASE
;
78 #ifndef __HAVE_ARCH_CMPXCHG
79 #warning ACPI uses CMPXCHG, i486 and later hardware
82 /* --------------------------------------------------------------------------
83 Boot-time Configuration
84 -------------------------------------------------------------------------- */
87 * The default interrupt routing model is PIC (8259). This gets
88 * overridden if IOAPICs are enumerated (below).
90 enum acpi_irq_model_id acpi_irq_model
= ACPI_IRQ_MODEL_PIC
;
94 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
95 * to map the target physical address. The problem is that set_fixmap()
96 * provides a single page, and it is possible that the page is not
98 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
99 * i.e. until the next __va_range() call.
101 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
102 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
103 * count idx down while incrementing the phys address.
105 char *__init
__acpi_map_table(unsigned long phys
, unsigned long size
)
111 return early_ioremap(phys
, size
);
113 void __init
__acpi_unmap_table(char *map
, unsigned long size
)
118 early_iounmap(map
, size
);
121 #ifdef CONFIG_X86_LOCAL_APIC
122 static int __init
acpi_parse_madt(struct acpi_table_header
*table
)
124 struct acpi_table_madt
*madt
= NULL
;
129 madt
= (struct acpi_table_madt
*)table
;
131 printk(KERN_WARNING PREFIX
"Unable to map MADT\n");
136 acpi_lapic_addr
= (u64
) madt
->address
;
138 printk(KERN_DEBUG PREFIX
"Local APIC address 0x%08x\n",
142 default_acpi_madt_oem_check(madt
->header
.oem_id
,
143 madt
->header
.oem_table_id
);
148 static void __cpuinit
acpi_register_lapic(int id
, u8 enabled
)
150 unsigned int ver
= 0;
157 if (boot_cpu_physical_apicid
!= -1U)
158 ver
= apic_version
[boot_cpu_physical_apicid
];
160 generic_processor_info(id
, ver
);
164 acpi_parse_x2apic(struct acpi_subtable_header
*header
, const unsigned long end
)
166 struct acpi_madt_local_x2apic
*processor
= NULL
;
168 processor
= (struct acpi_madt_local_x2apic
*)header
;
170 if (BAD_MADT_ENTRY(processor
, end
))
173 acpi_table_print_madt_entry(header
);
175 #ifdef CONFIG_X86_X2APIC
177 * We need to register disabled CPU as well to permit
178 * counting disabled CPUs. This allows us to size
179 * cpus_possible_map more accurately, to permit
180 * to not preallocating memory for all NR_CPUS
181 * when we use CPU hotplug.
183 acpi_register_lapic(processor
->local_apic_id
, /* APIC ID */
184 processor
->lapic_flags
& ACPI_MADT_ENABLED
);
186 printk(KERN_WARNING PREFIX
"x2apic entry ignored\n");
193 acpi_parse_lapic(struct acpi_subtable_header
* header
, const unsigned long end
)
195 struct acpi_madt_local_apic
*processor
= NULL
;
197 processor
= (struct acpi_madt_local_apic
*)header
;
199 if (BAD_MADT_ENTRY(processor
, end
))
202 acpi_table_print_madt_entry(header
);
205 * We need to register disabled CPU as well to permit
206 * counting disabled CPUs. This allows us to size
207 * cpus_possible_map more accurately, to permit
208 * to not preallocating memory for all NR_CPUS
209 * when we use CPU hotplug.
211 acpi_register_lapic(processor
->id
, /* APIC ID */
212 processor
->lapic_flags
& ACPI_MADT_ENABLED
);
218 acpi_parse_sapic(struct acpi_subtable_header
*header
, const unsigned long end
)
220 struct acpi_madt_local_sapic
*processor
= NULL
;
222 processor
= (struct acpi_madt_local_sapic
*)header
;
224 if (BAD_MADT_ENTRY(processor
, end
))
227 acpi_table_print_madt_entry(header
);
229 acpi_register_lapic((processor
->id
<< 8) | processor
->eid
,/* APIC ID */
230 processor
->lapic_flags
& ACPI_MADT_ENABLED
);
236 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header
* header
,
237 const unsigned long end
)
239 struct acpi_madt_local_apic_override
*lapic_addr_ovr
= NULL
;
241 lapic_addr_ovr
= (struct acpi_madt_local_apic_override
*)header
;
243 if (BAD_MADT_ENTRY(lapic_addr_ovr
, end
))
246 acpi_lapic_addr
= lapic_addr_ovr
->address
;
252 acpi_parse_x2apic_nmi(struct acpi_subtable_header
*header
,
253 const unsigned long end
)
255 struct acpi_madt_local_x2apic_nmi
*x2apic_nmi
= NULL
;
257 x2apic_nmi
= (struct acpi_madt_local_x2apic_nmi
*)header
;
259 if (BAD_MADT_ENTRY(x2apic_nmi
, end
))
262 acpi_table_print_madt_entry(header
);
264 if (x2apic_nmi
->lint
!= 1)
265 printk(KERN_WARNING PREFIX
"NMI not connected to LINT 1!\n");
271 acpi_parse_lapic_nmi(struct acpi_subtable_header
* header
, const unsigned long end
)
273 struct acpi_madt_local_apic_nmi
*lapic_nmi
= NULL
;
275 lapic_nmi
= (struct acpi_madt_local_apic_nmi
*)header
;
277 if (BAD_MADT_ENTRY(lapic_nmi
, end
))
280 acpi_table_print_madt_entry(header
);
282 if (lapic_nmi
->lint
!= 1)
283 printk(KERN_WARNING PREFIX
"NMI not connected to LINT 1!\n");
288 #endif /*CONFIG_X86_LOCAL_APIC */
290 #ifdef CONFIG_X86_IO_APIC
293 acpi_parse_ioapic(struct acpi_subtable_header
* header
, const unsigned long end
)
295 struct acpi_madt_io_apic
*ioapic
= NULL
;
297 ioapic
= (struct acpi_madt_io_apic
*)header
;
299 if (BAD_MADT_ENTRY(ioapic
, end
))
302 acpi_table_print_madt_entry(header
);
304 mp_register_ioapic(ioapic
->id
,
305 ioapic
->address
, ioapic
->global_irq_base
);
311 * Parse Interrupt Source Override for the ACPI SCI
313 static void __init
acpi_sci_ioapic_setup(u32 gsi
, u16 polarity
, u16 trigger
)
315 if (trigger
== 0) /* compatible SCI trigger is level */
318 if (polarity
== 0) /* compatible SCI polarity is low */
321 /* Command-line over-ride via acpi_sci= */
322 if (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
)
323 trigger
= (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2;
325 if (acpi_sci_flags
& ACPI_MADT_POLARITY_MASK
)
326 polarity
= acpi_sci_flags
& ACPI_MADT_POLARITY_MASK
;
329 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
330 * If GSI is < 16, this will update its flags,
331 * else it will create a new mp_irqs[] entry.
333 mp_override_legacy_irq(gsi
, polarity
, trigger
, gsi
);
336 * stash over-ride to indicate we've been here
337 * and for later update of acpi_gbl_FADT
339 acpi_sci_override_gsi
= gsi
;
344 acpi_parse_int_src_ovr(struct acpi_subtable_header
* header
,
345 const unsigned long end
)
347 struct acpi_madt_interrupt_override
*intsrc
= NULL
;
349 intsrc
= (struct acpi_madt_interrupt_override
*)header
;
351 if (BAD_MADT_ENTRY(intsrc
, end
))
354 acpi_table_print_madt_entry(header
);
356 if (intsrc
->source_irq
== acpi_gbl_FADT
.sci_interrupt
) {
357 acpi_sci_ioapic_setup(intsrc
->global_irq
,
358 intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
,
359 (intsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2);
363 if (acpi_skip_timer_override
&&
364 intsrc
->source_irq
== 0 && intsrc
->global_irq
== 2) {
365 printk(PREFIX
"BIOS IRQ0 pin2 override ignored.\n");
369 mp_override_legacy_irq(intsrc
->source_irq
,
370 intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
,
371 (intsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2,
378 acpi_parse_nmi_src(struct acpi_subtable_header
* header
, const unsigned long end
)
380 struct acpi_madt_nmi_source
*nmi_src
= NULL
;
382 nmi_src
= (struct acpi_madt_nmi_source
*)header
;
384 if (BAD_MADT_ENTRY(nmi_src
, end
))
387 acpi_table_print_madt_entry(header
);
389 /* TBD: Support nimsrc entries? */
394 #endif /* CONFIG_X86_IO_APIC */
397 * acpi_pic_sci_set_trigger()
399 * use ELCR to set PIC-mode trigger type for SCI
401 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
402 * it may require Edge Trigger -- use "acpi_sci=edge"
404 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
405 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
406 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
407 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
410 void __init
acpi_pic_sci_set_trigger(unsigned int irq
, u16 trigger
)
412 unsigned int mask
= 1 << irq
;
413 unsigned int old
, new;
415 /* Real old ELCR mask */
416 old
= inb(0x4d0) | (inb(0x4d1) << 8);
419 * If we use ACPI to set PCI IRQs, then we should clear ELCR
420 * since we will set it correctly as we enable the PCI irq
423 new = acpi_noirq
? old
: 0;
426 * Update SCI information in the ELCR, it isn't in the PCI
430 case 1: /* Edge - clear */
433 case 3: /* Level - set */
441 printk(PREFIX
"setting ELCR to %04x (from %04x)\n", new, old
);
443 outb(new >> 8, 0x4d1);
446 int acpi_gsi_to_irq(u32 gsi
, unsigned int *irq
)
453 * success: return IRQ number (>=0)
454 * failure: return < 0
456 int acpi_register_gsi(struct device
*dev
, u32 gsi
, int trigger
, int polarity
)
459 unsigned int plat_gsi
= gsi
;
463 * Make sure all (legacy) PCI IRQs are set as level-triggered.
465 if (acpi_irq_model
== ACPI_IRQ_MODEL_PIC
) {
466 if (trigger
== ACPI_LEVEL_SENSITIVE
)
467 eisa_set_level_irq(gsi
);
471 #ifdef CONFIG_X86_IO_APIC
472 if (acpi_irq_model
== ACPI_IRQ_MODEL_IOAPIC
) {
473 plat_gsi
= mp_register_gsi(dev
, gsi
, trigger
, polarity
);
476 acpi_gsi_to_irq(plat_gsi
, &irq
);
481 * ACPI based hotplug support for CPU
483 #ifdef CONFIG_ACPI_HOTPLUG_CPU
485 static int __cpuinit
_acpi_map_lsapic(acpi_handle handle
, int *pcpu
)
487 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
488 union acpi_object
*obj
;
489 struct acpi_madt_local_apic
*lapic
;
490 cpumask_var_t tmp_map
, new_map
;
493 int retval
= -ENOMEM
;
495 if (ACPI_FAILURE(acpi_evaluate_object(handle
, "_MAT", NULL
, &buffer
)))
498 if (!buffer
.length
|| !buffer
.pointer
)
501 obj
= buffer
.pointer
;
502 if (obj
->type
!= ACPI_TYPE_BUFFER
||
503 obj
->buffer
.length
< sizeof(*lapic
)) {
504 kfree(buffer
.pointer
);
508 lapic
= (struct acpi_madt_local_apic
*)obj
->buffer
.pointer
;
510 if (lapic
->header
.type
!= ACPI_MADT_TYPE_LOCAL_APIC
||
511 !(lapic
->lapic_flags
& ACPI_MADT_ENABLED
)) {
512 kfree(buffer
.pointer
);
518 kfree(buffer
.pointer
);
519 buffer
.length
= ACPI_ALLOCATE_BUFFER
;
520 buffer
.pointer
= NULL
;
522 if (!alloc_cpumask_var(&tmp_map
, GFP_KERNEL
))
525 if (!alloc_cpumask_var(&new_map
, GFP_KERNEL
))
528 cpumask_copy(tmp_map
, cpu_present_mask
);
529 acpi_register_lapic(physid
, lapic
->lapic_flags
& ACPI_MADT_ENABLED
);
532 * If mp_register_lapic successfully generates a new logical cpu
533 * number, then the following will get us exactly what was mapped
535 cpumask_andnot(new_map
, cpu_present_mask
, tmp_map
);
536 if (cpumask_empty(new_map
)) {
537 printk ("Unable to map lapic to logical cpu number\n");
542 cpu
= cpumask_first(new_map
);
548 free_cpumask_var(new_map
);
550 free_cpumask_var(tmp_map
);
555 /* wrapper to silence section mismatch warning */
556 int __ref
acpi_map_lsapic(acpi_handle handle
, int *pcpu
)
558 return _acpi_map_lsapic(handle
, pcpu
);
560 EXPORT_SYMBOL(acpi_map_lsapic
);
562 int acpi_unmap_lsapic(int cpu
)
564 per_cpu(x86_cpu_to_apicid
, cpu
) = -1;
565 set_cpu_present(cpu
, false);
571 EXPORT_SYMBOL(acpi_unmap_lsapic
);
572 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
574 int acpi_register_ioapic(acpi_handle handle
, u64 phys_addr
, u32 gsi_base
)
580 EXPORT_SYMBOL(acpi_register_ioapic
);
582 int acpi_unregister_ioapic(acpi_handle handle
, u32 gsi_base
)
588 EXPORT_SYMBOL(acpi_unregister_ioapic
);
590 static int __init
acpi_parse_sbf(struct acpi_table_header
*table
)
592 struct acpi_table_boot
*sb
;
594 sb
= (struct acpi_table_boot
*)table
;
596 printk(KERN_WARNING PREFIX
"Unable to map SBF\n");
600 sbf_port
= sb
->cmos_index
; /* Save CMOS port */
605 #ifdef CONFIG_HPET_TIMER
606 #include <asm/hpet.h>
608 static struct __initdata resource
*hpet_res
;
610 static int __init
acpi_parse_hpet(struct acpi_table_header
*table
)
612 struct acpi_table_hpet
*hpet_tbl
;
614 hpet_tbl
= (struct acpi_table_hpet
*)table
;
616 printk(KERN_WARNING PREFIX
"Unable to map HPET\n");
620 if (hpet_tbl
->address
.space_id
!= ACPI_SPACE_MEM
) {
621 printk(KERN_WARNING PREFIX
"HPET timers must be located in "
626 hpet_address
= hpet_tbl
->address
.address
;
627 hpet_blockid
= hpet_tbl
->sequence
;
630 * Some broken BIOSes advertise HPET at 0x0. We really do not
631 * want to allocate a resource there.
634 printk(KERN_WARNING PREFIX
635 "HPET id: %#x base: %#lx is invalid\n",
636 hpet_tbl
->id
, hpet_address
);
641 * Some even more broken BIOSes advertise HPET at
642 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
645 if (hpet_address
== 0xfed0000000000000UL
) {
646 if (!hpet_force_user
) {
647 printk(KERN_WARNING PREFIX
"HPET id: %#x "
648 "base: 0xfed0000000000000 is bogus\n "
649 "try hpet=force on the kernel command line to "
650 "fix it up to 0xfed00000.\n", hpet_tbl
->id
);
654 printk(KERN_WARNING PREFIX
655 "HPET id: %#x base: 0xfed0000000000000 fixed up "
656 "to 0xfed00000.\n", hpet_tbl
->id
);
660 printk(KERN_INFO PREFIX
"HPET id: %#x base: %#lx\n",
661 hpet_tbl
->id
, hpet_address
);
664 * Allocate and initialize the HPET firmware resource for adding into
665 * the resource tree during the lateinit timeframe.
667 #define HPET_RESOURCE_NAME_SIZE 9
668 hpet_res
= alloc_bootmem(sizeof(*hpet_res
) + HPET_RESOURCE_NAME_SIZE
);
670 hpet_res
->name
= (void *)&hpet_res
[1];
671 hpet_res
->flags
= IORESOURCE_MEM
;
672 snprintf((char *)hpet_res
->name
, HPET_RESOURCE_NAME_SIZE
, "HPET %u",
675 hpet_res
->start
= hpet_address
;
676 hpet_res
->end
= hpet_address
+ (1 * 1024) - 1;
682 * hpet_insert_resource inserts the HPET resources used into the resource
685 static __init
int hpet_insert_resource(void)
690 return insert_resource(&iomem_resource
, hpet_res
);
693 late_initcall(hpet_insert_resource
);
696 #define acpi_parse_hpet NULL
699 static int __init
acpi_parse_fadt(struct acpi_table_header
*table
)
702 #ifdef CONFIG_X86_PM_TIMER
703 /* detect the location of the ACPI PM Timer */
704 if (acpi_gbl_FADT
.header
.revision
>= FADT2_REVISION_ID
) {
706 if (acpi_gbl_FADT
.xpm_timer_block
.space_id
!=
707 ACPI_ADR_SPACE_SYSTEM_IO
)
710 pmtmr_ioport
= acpi_gbl_FADT
.xpm_timer_block
.address
;
712 * "X" fields are optional extensions to the original V1.0
713 * fields, so we must selectively expand V1.0 fields if the
714 * corresponding X field is zero.
717 pmtmr_ioport
= acpi_gbl_FADT
.pm_timer_block
;
720 pmtmr_ioport
= acpi_gbl_FADT
.pm_timer_block
;
723 printk(KERN_INFO PREFIX
"PM-Timer IO Port: %#x\n",
729 #ifdef CONFIG_X86_LOCAL_APIC
731 * Parse LAPIC entries in MADT
732 * returns 0 on success, < 0 on error
735 static void __init
acpi_register_lapic_address(unsigned long address
)
737 mp_lapic_addr
= address
;
739 set_fixmap_nocache(FIX_APIC_BASE
, address
);
740 if (boot_cpu_physical_apicid
== -1U) {
741 boot_cpu_physical_apicid
= read_apic_id();
742 apic_version
[boot_cpu_physical_apicid
] =
743 GET_APIC_VERSION(apic_read(APIC_LVR
));
747 static int __init
early_acpi_parse_madt_lapic_addr_ovr(void)
755 * Note that the LAPIC address is obtained from the MADT (32-bit value)
756 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
760 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE
,
761 acpi_parse_lapic_addr_ovr
, 0);
763 printk(KERN_ERR PREFIX
764 "Error parsing LAPIC address override entry\n");
768 acpi_register_lapic_address(acpi_lapic_addr
);
773 static int __init
acpi_parse_madt_lapic_entries(void)
782 * Note that the LAPIC address is obtained from the MADT (32-bit value)
783 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
787 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE
,
788 acpi_parse_lapic_addr_ovr
, 0);
790 printk(KERN_ERR PREFIX
791 "Error parsing LAPIC address override entry\n");
795 acpi_register_lapic_address(acpi_lapic_addr
);
797 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC
,
798 acpi_parse_sapic
, MAX_APICS
);
801 x2count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC
,
802 acpi_parse_x2apic
, MAX_APICS
);
803 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC
,
804 acpi_parse_lapic
, MAX_APICS
);
806 if (!count
&& !x2count
) {
807 printk(KERN_ERR PREFIX
"No LAPIC entries present\n");
808 /* TBD: Cleanup to allow fallback to MPS */
810 } else if (count
< 0 || x2count
< 0) {
811 printk(KERN_ERR PREFIX
"Error parsing LAPIC entry\n");
812 /* TBD: Cleanup to allow fallback to MPS */
817 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI
,
818 acpi_parse_x2apic_nmi
, 0);
820 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI
, acpi_parse_lapic_nmi
, 0);
821 if (count
< 0 || x2count
< 0) {
822 printk(KERN_ERR PREFIX
"Error parsing LAPIC NMI entry\n");
823 /* TBD: Cleanup to allow fallback to MPS */
828 #endif /* CONFIG_X86_LOCAL_APIC */
830 #ifdef CONFIG_X86_IO_APIC
833 #ifdef CONFIG_X86_ES7000
834 extern int es7000_plat
;
840 } mp_ioapic_routing
[MAX_IO_APICS
];
842 int mp_find_ioapic(int gsi
)
846 /* Find the IOAPIC that manages this GSI. */
847 for (i
= 0; i
< nr_ioapics
; i
++) {
848 if ((gsi
>= mp_ioapic_routing
[i
].gsi_base
)
849 && (gsi
<= mp_ioapic_routing
[i
].gsi_end
))
853 printk(KERN_ERR
"ERROR: Unable to locate IOAPIC for GSI %d\n", gsi
);
857 int mp_find_ioapic_pin(int ioapic
, int gsi
)
859 if (WARN_ON(ioapic
== -1))
861 if (WARN_ON(gsi
> mp_ioapic_routing
[ioapic
].gsi_end
))
864 return gsi
- mp_ioapic_routing
[ioapic
].gsi_base
;
867 static u8 __init
uniq_ioapic_id(u8 id
)
870 if ((boot_cpu_data
.x86_vendor
== X86_VENDOR_INTEL
) &&
871 !APIC_XAPIC(apic_version
[boot_cpu_physical_apicid
]))
872 return io_apic_get_unique_id(nr_ioapics
, id
);
877 DECLARE_BITMAP(used
, 256);
878 bitmap_zero(used
, 256);
879 for (i
= 0; i
< nr_ioapics
; i
++) {
880 struct mpc_ioapic
*ia
= &mp_ioapics
[i
];
881 __set_bit(ia
->apicid
, used
);
883 if (!test_bit(id
, used
))
885 return find_first_zero_bit(used
, 256);
889 static int bad_ioapic(unsigned long address
)
891 if (nr_ioapics
>= MAX_IO_APICS
) {
892 printk(KERN_ERR
"ERROR: Max # of I/O APICs (%d) exceeded "
893 "(found %d)\n", MAX_IO_APICS
, nr_ioapics
);
894 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
897 printk(KERN_ERR
"WARNING: Bogus (zero) I/O APIC address"
898 " found in table, skipping!\n");
904 void __init
mp_register_ioapic(int id
, u32 address
, u32 gsi_base
)
908 if (bad_ioapic(address
))
913 mp_ioapics
[idx
].type
= MP_IOAPIC
;
914 mp_ioapics
[idx
].flags
= MPC_APIC_USABLE
;
915 mp_ioapics
[idx
].apicaddr
= address
;
917 set_fixmap_nocache(FIX_IO_APIC_BASE_0
+ idx
, address
);
918 mp_ioapics
[idx
].apicid
= uniq_ioapic_id(id
);
919 mp_ioapics
[idx
].apicver
= io_apic_get_version(idx
);
922 * Build basic GSI lookup table to facilitate gsi->io_apic lookups
923 * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
925 mp_ioapic_routing
[idx
].gsi_base
= gsi_base
;
926 mp_ioapic_routing
[idx
].gsi_end
= gsi_base
+
927 io_apic_get_redir_entries(idx
);
929 printk(KERN_INFO
"IOAPIC[%d]: apic_id %d, version %d, address 0x%x, "
930 "GSI %d-%d\n", idx
, mp_ioapics
[idx
].apicid
,
931 mp_ioapics
[idx
].apicver
, mp_ioapics
[idx
].apicaddr
,
932 mp_ioapic_routing
[idx
].gsi_base
, mp_ioapic_routing
[idx
].gsi_end
);
937 int __init
acpi_probe_gsi(void)
950 for (idx
= 0; idx
< nr_ioapics
; idx
++) {
951 gsi
= mp_ioapic_routing
[idx
].gsi_end
;
960 static void assign_to_mp_irq(struct mpc_intsrc
*m
,
961 struct mpc_intsrc
*mp_irq
)
963 memcpy(mp_irq
, m
, sizeof(struct mpc_intsrc
));
966 static int mp_irq_cmp(struct mpc_intsrc
*mp_irq
,
967 struct mpc_intsrc
*m
)
969 return memcmp(mp_irq
, m
, sizeof(struct mpc_intsrc
));
972 static void save_mp_irq(struct mpc_intsrc
*m
)
976 for (i
= 0; i
< mp_irq_entries
; i
++) {
977 if (!mp_irq_cmp(&mp_irqs
[i
], m
))
981 assign_to_mp_irq(m
, &mp_irqs
[mp_irq_entries
]);
982 if (++mp_irq_entries
== MAX_IRQ_SOURCES
)
983 panic("Max # of irq sources exceeded!!\n");
986 void __init
mp_override_legacy_irq(u8 bus_irq
, u8 polarity
, u8 trigger
, u32 gsi
)
990 struct mpc_intsrc mp_irq
;
993 * Convert 'gsi' to 'ioapic.pin'.
995 ioapic
= mp_find_ioapic(gsi
);
998 pin
= mp_find_ioapic_pin(ioapic
, gsi
);
1001 * TBD: This check is for faulty timer entries, where the override
1002 * erroneously sets the trigger to level, resulting in a HUGE
1003 * increase of timer interrupts!
1005 if ((bus_irq
== 0) && (trigger
== 3))
1008 mp_irq
.type
= MP_INTSRC
;
1009 mp_irq
.irqtype
= mp_INT
;
1010 mp_irq
.irqflag
= (trigger
<< 2) | polarity
;
1011 mp_irq
.srcbus
= MP_ISA_BUS
;
1012 mp_irq
.srcbusirq
= bus_irq
; /* IRQ */
1013 mp_irq
.dstapic
= mp_ioapics
[ioapic
].apicid
; /* APIC ID */
1014 mp_irq
.dstirq
= pin
; /* INTIN# */
1016 save_mp_irq(&mp_irq
);
1019 void __init
mp_config_acpi_legacy_irqs(void)
1023 unsigned int dstapic
;
1024 struct mpc_intsrc mp_irq
;
1026 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
1028 * Fabricate the legacy ISA bus (bus #31).
1030 mp_bus_id_to_type
[MP_ISA_BUS
] = MP_BUS_ISA
;
1032 set_bit(MP_ISA_BUS
, mp_bus_not_pci
);
1033 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS
);
1035 #ifdef CONFIG_X86_ES7000
1037 * Older generations of ES7000 have no legacy identity mappings
1039 if (es7000_plat
== 1)
1044 * Locate the IOAPIC that manages the ISA IRQs (0-15).
1046 ioapic
= mp_find_ioapic(0);
1049 dstapic
= mp_ioapics
[ioapic
].apicid
;
1052 * Use the default configuration for the IRQs 0-15. Unless
1053 * overridden by (MADT) interrupt source override entries.
1055 for (i
= 0; i
< 16; i
++) {
1058 for (idx
= 0; idx
< mp_irq_entries
; idx
++) {
1059 struct mpc_intsrc
*irq
= mp_irqs
+ idx
;
1061 /* Do we already have a mapping for this ISA IRQ? */
1062 if (irq
->srcbus
== MP_ISA_BUS
&& irq
->srcbusirq
== i
)
1065 /* Do we already have a mapping for this IOAPIC pin */
1066 if (irq
->dstapic
== dstapic
&& irq
->dstirq
== i
)
1070 if (idx
!= mp_irq_entries
) {
1071 printk(KERN_DEBUG
"ACPI: IRQ%d used by override.\n", i
);
1072 continue; /* IRQ already used */
1075 mp_irq
.type
= MP_INTSRC
;
1076 mp_irq
.irqflag
= 0; /* Conforming */
1077 mp_irq
.srcbus
= MP_ISA_BUS
;
1078 mp_irq
.dstapic
= dstapic
;
1079 mp_irq
.irqtype
= mp_INT
;
1080 mp_irq
.srcbusirq
= i
; /* Identity mapped */
1083 save_mp_irq(&mp_irq
);
1087 static int mp_config_acpi_gsi(struct device
*dev
, u32 gsi
, int trigger
,
1090 #ifdef CONFIG_X86_MPPARSE
1091 struct mpc_intsrc mp_irq
;
1092 struct pci_dev
*pdev
;
1093 unsigned char number
;
1102 if (dev
->bus
!= &pci_bus_type
)
1105 pdev
= to_pci_dev(dev
);
1106 number
= pdev
->bus
->number
;
1107 devfn
= pdev
->devfn
;
1109 /* print the entry should happen on mptable identically */
1110 mp_irq
.type
= MP_INTSRC
;
1111 mp_irq
.irqtype
= mp_INT
;
1112 mp_irq
.irqflag
= (trigger
== ACPI_EDGE_SENSITIVE
? 4 : 0x0c) |
1113 (polarity
== ACPI_ACTIVE_HIGH
? 1 : 3);
1114 mp_irq
.srcbus
= number
;
1115 mp_irq
.srcbusirq
= (((devfn
>> 3) & 0x1f) << 2) | ((pin
- 1) & 3);
1116 ioapic
= mp_find_ioapic(gsi
);
1117 mp_irq
.dstapic
= mp_ioapics
[ioapic
].apicid
;
1118 mp_irq
.dstirq
= mp_find_ioapic_pin(ioapic
, gsi
);
1120 save_mp_irq(&mp_irq
);
1125 int mp_register_gsi(struct device
*dev
, u32 gsi
, int trigger
, int polarity
)
1129 struct io_apic_irq_attr irq_attr
;
1131 if (acpi_irq_model
!= ACPI_IRQ_MODEL_IOAPIC
)
1134 /* Don't set up the ACPI SCI because it's already set up */
1135 if (acpi_gbl_FADT
.sci_interrupt
== gsi
)
1138 ioapic
= mp_find_ioapic(gsi
);
1140 printk(KERN_WARNING
"No IOAPIC for GSI %u\n", gsi
);
1144 ioapic_pin
= mp_find_ioapic_pin(ioapic
, gsi
);
1146 #ifdef CONFIG_X86_32
1147 if (ioapic_renumber_irq
)
1148 gsi
= ioapic_renumber_irq(ioapic
, gsi
);
1151 if (ioapic_pin
> MP_MAX_IOAPIC_PIN
) {
1152 printk(KERN_ERR
"Invalid reference to IOAPIC pin "
1153 "%d-%d\n", mp_ioapics
[ioapic
].apicid
,
1158 if (enable_update_mptable
)
1159 mp_config_acpi_gsi(dev
, gsi
, trigger
, polarity
);
1161 set_io_apic_irq_attr(&irq_attr
, ioapic
, ioapic_pin
,
1162 trigger
== ACPI_EDGE_SENSITIVE
? 0 : 1,
1163 polarity
== ACPI_ACTIVE_HIGH
? 0 : 1);
1164 io_apic_set_pci_routing(dev
, gsi
, &irq_attr
);
1170 * Parse IOAPIC related entries in MADT
1171 * returns 0 on success, < 0 on error
1173 static int __init
acpi_parse_madt_ioapic_entries(void)
1178 * ACPI interpreter is required to complete interrupt setup,
1179 * so if it is off, don't enumerate the io-apics with ACPI.
1180 * If MPS is present, it will handle them,
1181 * otherwise the system will stay in PIC mode
1183 if (acpi_disabled
|| acpi_noirq
) {
1191 * if "noapic" boot option, don't look for IO-APICs
1193 if (skip_ioapic_setup
) {
1194 printk(KERN_INFO PREFIX
"Skipping IOAPIC probe "
1195 "due to 'noapic' option.\n");
1200 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC
, acpi_parse_ioapic
,
1203 printk(KERN_ERR PREFIX
"No IOAPIC entries present\n");
1205 } else if (count
< 0) {
1206 printk(KERN_ERR PREFIX
"Error parsing IOAPIC entry\n");
1211 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE
, acpi_parse_int_src_ovr
,
1214 printk(KERN_ERR PREFIX
1215 "Error parsing interrupt source overrides entry\n");
1216 /* TBD: Cleanup to allow fallback to MPS */
1221 * If BIOS did not supply an INT_SRC_OVR for the SCI
1222 * pretend we got one so we can set the SCI flags.
1224 if (!acpi_sci_override_gsi
)
1225 acpi_sci_ioapic_setup(acpi_gbl_FADT
.sci_interrupt
, 0, 0);
1227 /* Fill in identity legacy mapings where no override */
1228 mp_config_acpi_legacy_irqs();
1231 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE
, acpi_parse_nmi_src
,
1234 printk(KERN_ERR PREFIX
"Error parsing NMI SRC entry\n");
1235 /* TBD: Cleanup to allow fallback to MPS */
1242 static inline int acpi_parse_madt_ioapic_entries(void)
1246 #endif /* !CONFIG_X86_IO_APIC */
1248 static void __init
early_acpi_process_madt(void)
1250 #ifdef CONFIG_X86_LOCAL_APIC
1253 if (!acpi_table_parse(ACPI_SIG_MADT
, acpi_parse_madt
)) {
1256 * Parse MADT LAPIC entries
1258 error
= early_acpi_parse_madt_lapic_addr_ovr();
1261 smp_found_config
= 1;
1263 if (error
== -EINVAL
) {
1265 * Dell Precision Workstation 410, 610 come here.
1267 printk(KERN_ERR PREFIX
1268 "Invalid BIOS MADT, disabling ACPI\n");
1275 static void __init
acpi_process_madt(void)
1277 #ifdef CONFIG_X86_LOCAL_APIC
1280 if (!acpi_table_parse(ACPI_SIG_MADT
, acpi_parse_madt
)) {
1283 * Parse MADT LAPIC entries
1285 error
= acpi_parse_madt_lapic_entries();
1289 #ifdef CONFIG_X86_BIGSMP
1290 generic_bigsmp_probe();
1293 * Parse MADT IO-APIC entries
1295 error
= acpi_parse_madt_ioapic_entries();
1297 acpi_irq_model
= ACPI_IRQ_MODEL_IOAPIC
;
1300 smp_found_config
= 1;
1301 if (apic
->setup_apic_routing
)
1302 apic
->setup_apic_routing();
1305 if (error
== -EINVAL
) {
1307 * Dell Precision Workstation 410, 610 come here.
1309 printk(KERN_ERR PREFIX
1310 "Invalid BIOS MADT, disabling ACPI\n");
1315 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1316 * In the event an MPS table was found, forget it.
1317 * Boot with "acpi=off" to use MPS on such a system.
1319 if (smp_found_config
) {
1320 printk(KERN_WARNING PREFIX
1321 "No APIC-table, disabling MPS\n");
1322 smp_found_config
= 0;
1327 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1328 * processors, where MPS only supports physical.
1330 if (acpi_lapic
&& acpi_ioapic
)
1331 printk(KERN_INFO
"Using ACPI (MADT) for SMP configuration "
1333 else if (acpi_lapic
)
1334 printk(KERN_INFO
"Using ACPI for processor (LAPIC) "
1335 "configuration information\n");
1340 static int __init
disable_acpi_irq(const struct dmi_system_id
*d
)
1343 printk(KERN_NOTICE
"%s detected: force use of acpi=noirq\n",
1350 static int __init
disable_acpi_pci(const struct dmi_system_id
*d
)
1353 printk(KERN_NOTICE
"%s detected: force use of pci=noacpi\n",
1360 static int __init
dmi_disable_acpi(const struct dmi_system_id
*d
)
1363 printk(KERN_NOTICE
"%s detected: acpi off\n", d
->ident
);
1367 "Warning: DMI blacklist says broken, but acpi forced\n");
1373 * Limit ACPI to CPU enumeration for HT
1375 static int __init
force_acpi_ht(const struct dmi_system_id
*d
)
1378 printk(KERN_NOTICE
"%s detected: force use of acpi=ht\n",
1384 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1390 * Force ignoring BIOS IRQ0 pin2 override
1392 static int __init
dmi_ignore_irq0_timer_override(const struct dmi_system_id
*d
)
1395 * The ati_ixp4x0_rev() early PCI quirk should have set
1396 * the acpi_skip_timer_override flag already:
1398 if (!acpi_skip_timer_override
) {
1399 WARN(1, KERN_ERR
"ati_ixp4x0 quirk not complete.\n");
1400 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1402 acpi_skip_timer_override
= 1;
1408 * If your system is blacklisted here, but you find that acpi=force
1409 * works for you, please contact linux-acpi@vger.kernel.org
1411 static struct dmi_system_id __initdata acpi_dmi_table
[] = {
1413 * Boxes that need ACPI disabled
1416 .callback
= dmi_disable_acpi
,
1417 .ident
= "IBM Thinkpad",
1419 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1420 DMI_MATCH(DMI_BOARD_NAME
, "2629H1G"),
1425 * Boxes that need acpi=ht
1428 .callback
= force_acpi_ht
,
1429 .ident
= "FSC Primergy T850",
1431 DMI_MATCH(DMI_SYS_VENDOR
, "FUJITSU SIEMENS"),
1432 DMI_MATCH(DMI_PRODUCT_NAME
, "PRIMERGY T850"),
1436 .callback
= force_acpi_ht
,
1437 .ident
= "HP VISUALIZE NT Workstation",
1439 DMI_MATCH(DMI_BOARD_VENDOR
, "Hewlett-Packard"),
1440 DMI_MATCH(DMI_PRODUCT_NAME
, "HP VISUALIZE NT Workstation"),
1444 .callback
= force_acpi_ht
,
1445 .ident
= "Compaq Workstation W8000",
1447 DMI_MATCH(DMI_SYS_VENDOR
, "Compaq"),
1448 DMI_MATCH(DMI_PRODUCT_NAME
, "Workstation W8000"),
1452 .callback
= force_acpi_ht
,
1453 .ident
= "ASUS P2B-DS",
1455 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1456 DMI_MATCH(DMI_BOARD_NAME
, "P2B-DS"),
1460 .callback
= force_acpi_ht
,
1461 .ident
= "ASUS CUR-DLS",
1463 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1464 DMI_MATCH(DMI_BOARD_NAME
, "CUR-DLS"),
1468 .callback
= force_acpi_ht
,
1469 .ident
= "ABIT i440BX-W83977",
1471 DMI_MATCH(DMI_BOARD_VENDOR
, "ABIT <http://www.abit.com>"),
1472 DMI_MATCH(DMI_BOARD_NAME
, "i440BX-W83977 (BP6)"),
1476 .callback
= force_acpi_ht
,
1477 .ident
= "IBM Bladecenter",
1479 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1480 DMI_MATCH(DMI_BOARD_NAME
, "IBM eServer BladeCenter HS20"),
1484 .callback
= force_acpi_ht
,
1485 .ident
= "IBM eServer xSeries 360",
1487 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1488 DMI_MATCH(DMI_BOARD_NAME
, "eServer xSeries 360"),
1492 .callback
= force_acpi_ht
,
1493 .ident
= "IBM eserver xSeries 330",
1495 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1496 DMI_MATCH(DMI_BOARD_NAME
, "eserver xSeries 330"),
1500 .callback
= force_acpi_ht
,
1501 .ident
= "IBM eserver xSeries 440",
1503 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1504 DMI_MATCH(DMI_PRODUCT_NAME
, "eserver xSeries 440"),
1509 * Boxes that need ACPI PCI IRQ routing disabled
1512 .callback
= disable_acpi_irq
,
1513 .ident
= "ASUS A7V",
1515 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC"),
1516 DMI_MATCH(DMI_BOARD_NAME
, "<A7V>"),
1517 /* newer BIOS, Revision 1011, does work */
1518 DMI_MATCH(DMI_BIOS_VERSION
,
1519 "ASUS A7V ACPI BIOS Revision 1007"),
1524 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1525 * for LPC bridge, which is needed for the PCI
1526 * interrupt links to work. DSDT fix is in bug 5966.
1527 * 2645, 2646 model numbers are shared with 600/600E/600X
1529 .callback
= disable_acpi_irq
,
1530 .ident
= "IBM Thinkpad 600 Series 2645",
1532 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1533 DMI_MATCH(DMI_BOARD_NAME
, "2645"),
1537 .callback
= disable_acpi_irq
,
1538 .ident
= "IBM Thinkpad 600 Series 2646",
1540 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1541 DMI_MATCH(DMI_BOARD_NAME
, "2646"),
1545 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1548 .callback
= disable_acpi_pci
,
1549 .ident
= "ASUS PR-DLS",
1551 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1552 DMI_MATCH(DMI_BOARD_NAME
, "PR-DLS"),
1553 DMI_MATCH(DMI_BIOS_VERSION
,
1554 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1555 DMI_MATCH(DMI_BIOS_DATE
, "03/21/2003")
1559 .callback
= disable_acpi_pci
,
1560 .ident
= "Acer TravelMate 36x Laptop",
1562 DMI_MATCH(DMI_SYS_VENDOR
, "Acer"),
1563 DMI_MATCH(DMI_PRODUCT_NAME
, "TravelMate 360"),
1569 /* second table for DMI checks that should run after early-quirks */
1570 static struct dmi_system_id __initdata acpi_dmi_table_late
[] = {
1572 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1573 * which includes some code which overrides all temperature
1574 * trip points to 16C if the INTIN2 input of the I/O APIC
1575 * is enabled. This input is incorrectly designated the
1576 * ISA IRQ 0 via an interrupt source override even though
1577 * it is wired to the output of the master 8259A and INTIN0
1578 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1579 * override in that cases.
1582 .callback
= dmi_ignore_irq0_timer_override
,
1583 .ident
= "HP nx6115 laptop",
1585 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1586 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq nx6115"),
1590 .callback
= dmi_ignore_irq0_timer_override
,
1591 .ident
= "HP NX6125 laptop",
1593 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1594 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq nx6125"),
1598 .callback
= dmi_ignore_irq0_timer_override
,
1599 .ident
= "HP NX6325 laptop",
1601 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1602 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq nx6325"),
1606 .callback
= dmi_ignore_irq0_timer_override
,
1607 .ident
= "HP 6715b laptop",
1609 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1610 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq 6715b"),
1617 * acpi_boot_table_init() and acpi_boot_init()
1618 * called from setup_arch(), always.
1619 * 1. checksums all tables
1620 * 2. enumerates lapics
1621 * 3. enumerates io-apics
1623 * acpi_table_init() is separate to allow reading SRAT without
1624 * other side effects.
1626 * side effects of acpi_boot_init:
1627 * acpi_lapic = 1 if LAPIC found
1628 * acpi_ioapic = 1 if IOAPIC found
1629 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1630 * if acpi_blacklisted() acpi_disabled = 1;
1631 * acpi_irq_model=...
1634 * return value: (currently ignored)
1639 int __init
acpi_boot_table_init(void)
1643 dmi_check_system(acpi_dmi_table
);
1646 * If acpi_disabled, bail out
1647 * One exception: acpi=ht continues far enough to enumerate LAPICs
1649 if (acpi_disabled
&& !acpi_ht
)
1653 * Initialize the ACPI boot-time table parser.
1655 error
= acpi_table_init();
1661 acpi_table_parse(ACPI_SIG_BOOT
, acpi_parse_sbf
);
1664 * blacklist may disable ACPI entirely
1666 error
= acpi_blacklisted();
1669 printk(KERN_WARNING PREFIX
"acpi=force override\n");
1671 printk(KERN_WARNING PREFIX
"Disabling ACPI support\n");
1680 int __init
early_acpi_boot_init(void)
1683 * If acpi_disabled, bail out
1684 * One exception: acpi=ht continues far enough to enumerate LAPICs
1686 if (acpi_disabled
&& !acpi_ht
)
1690 * Process the Multiple APIC Description Table (MADT), if present
1692 early_acpi_process_madt();
1697 int __init
acpi_boot_init(void)
1699 /* those are executed after early-quirks are executed */
1700 dmi_check_system(acpi_dmi_table_late
);
1703 * If acpi_disabled, bail out
1704 * One exception: acpi=ht continues far enough to enumerate LAPICs
1706 if (acpi_disabled
&& !acpi_ht
)
1709 acpi_table_parse(ACPI_SIG_BOOT
, acpi_parse_sbf
);
1712 * set sci_int and PM timer address
1714 acpi_table_parse(ACPI_SIG_FADT
, acpi_parse_fadt
);
1717 * Process the Multiple APIC Description Table (MADT), if present
1719 acpi_process_madt();
1721 acpi_table_parse(ACPI_SIG_HPET
, acpi_parse_hpet
);
1726 static int __init
parse_acpi(char *arg
)
1731 /* "acpi=off" disables both ACPI table parsing and interpreter */
1732 if (strcmp(arg
, "off") == 0) {
1735 /* acpi=force to over-ride black-list */
1736 else if (strcmp(arg
, "force") == 0) {
1741 /* acpi=strict disables out-of-spec workarounds */
1742 else if (strcmp(arg
, "strict") == 0) {
1745 /* Limit ACPI just to boot-time to enable HT */
1746 else if (strcmp(arg
, "ht") == 0) {
1751 /* acpi=rsdt use RSDT instead of XSDT */
1752 else if (strcmp(arg
, "rsdt") == 0) {
1753 acpi_rsdt_forced
= 1;
1755 /* "acpi=noirq" disables ACPI interrupt routing */
1756 else if (strcmp(arg
, "noirq") == 0) {
1759 /* Core will printk when we return error. */
1764 early_param("acpi", parse_acpi
);
1766 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1767 static int __init
parse_pci(char *arg
)
1769 if (arg
&& strcmp(arg
, "noacpi") == 0)
1773 early_param("pci", parse_pci
);
1775 int __init
acpi_mps_check(void)
1777 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1778 /* mptable code is not built-in*/
1779 if (acpi_disabled
|| acpi_noirq
) {
1780 printk(KERN_WARNING
"MPS support code is not built-in.\n"
1781 "Using acpi=off or acpi=noirq or pci=noacpi "
1782 "may have problem\n");
1789 #ifdef CONFIG_X86_IO_APIC
1790 static int __init
parse_acpi_skip_timer_override(char *arg
)
1792 acpi_skip_timer_override
= 1;
1795 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override
);
1797 static int __init
parse_acpi_use_timer_override(char *arg
)
1799 acpi_use_timer_override
= 1;
1802 early_param("acpi_use_timer_override", parse_acpi_use_timer_override
);
1803 #endif /* CONFIG_X86_IO_APIC */
1805 static int __init
setup_acpi_sci(char *s
)
1809 if (!strcmp(s
, "edge"))
1810 acpi_sci_flags
= ACPI_MADT_TRIGGER_EDGE
|
1811 (acpi_sci_flags
& ~ACPI_MADT_TRIGGER_MASK
);
1812 else if (!strcmp(s
, "level"))
1813 acpi_sci_flags
= ACPI_MADT_TRIGGER_LEVEL
|
1814 (acpi_sci_flags
& ~ACPI_MADT_TRIGGER_MASK
);
1815 else if (!strcmp(s
, "high"))
1816 acpi_sci_flags
= ACPI_MADT_POLARITY_ACTIVE_HIGH
|
1817 (acpi_sci_flags
& ~ACPI_MADT_POLARITY_MASK
);
1818 else if (!strcmp(s
, "low"))
1819 acpi_sci_flags
= ACPI_MADT_POLARITY_ACTIVE_LOW
|
1820 (acpi_sci_flags
& ~ACPI_MADT_POLARITY_MASK
);
1825 early_param("acpi_sci", setup_acpi_sci
);
1827 int __acpi_acquire_global_lock(unsigned int *lock
)
1829 unsigned int old
, new, val
;
1832 new = (((old
& ~0x3) + 2) + ((old
>> 1) & 0x1));
1833 val
= cmpxchg(lock
, old
, new);
1834 } while (unlikely (val
!= old
));
1835 return (new < 3) ? -1 : 0;
1838 int __acpi_release_global_lock(unsigned int *lock
)
1840 unsigned int old
, new, val
;
1844 val
= cmpxchg(lock
, old
, new);
1845 } while (unlikely (val
!= old
));