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/irqdomain.h>
35 #include <linux/slab.h>
36 #include <linux/bootmem.h>
37 #include <linux/ioport.h>
38 #include <linux/pci.h>
40 #include <asm/pci_x86.h>
41 #include <asm/pgtable.h>
42 #include <asm/io_apic.h>
45 #include <asm/mpspec.h>
47 #include <asm/i8259.h>
49 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
50 static int __initdata acpi_force
= 0;
52 EXPORT_SYMBOL(acpi_disabled
);
55 # include <asm/proto.h>
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
);
67 int acpi_disable_cmcff
;
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
;
73 int acpi_fix_pin2_polarity __initdata
;
75 #ifdef CONFIG_X86_LOCAL_APIC
76 static u64 acpi_lapic_addr __initdata
= APIC_DEFAULT_PHYS_BASE
;
80 * Locks related to IOAPIC hotplug
82 * ->device_hotplug_lock
85 * Interrupt mapping side:
90 static DEFINE_MUTEX(acpi_ioapic_lock
);
92 /* --------------------------------------------------------------------------
93 Boot-time Configuration
94 -------------------------------------------------------------------------- */
97 * The default interrupt routing model is PIC (8259). This gets
98 * overridden if IOAPICs are enumerated (below).
100 enum acpi_irq_model_id acpi_irq_model
= ACPI_IRQ_MODEL_PIC
;
104 * ISA irqs by default are the first 16 gsis but can be
105 * any gsi as specified by an interrupt source override.
107 static u32 isa_irq_to_gsi
[NR_IRQS_LEGACY
] __read_mostly
= {
108 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
111 #define ACPI_INVALID_GSI INT_MIN
114 * This is just a simple wrapper around early_ioremap(),
115 * with sanity checks for phys == 0 and size == 0.
117 char *__init
__acpi_map_table(unsigned long phys
, unsigned long size
)
123 return early_ioremap(phys
, size
);
126 void __init
__acpi_unmap_table(char *map
, unsigned long size
)
131 early_iounmap(map
, size
);
134 #ifdef CONFIG_X86_LOCAL_APIC
135 static int __init
acpi_parse_madt(struct acpi_table_header
*table
)
137 struct acpi_table_madt
*madt
= NULL
;
142 madt
= (struct acpi_table_madt
*)table
;
144 printk(KERN_WARNING PREFIX
"Unable to map MADT\n");
149 acpi_lapic_addr
= (u64
) madt
->address
;
151 printk(KERN_DEBUG PREFIX
"Local APIC address 0x%08x\n",
155 default_acpi_madt_oem_check(madt
->header
.oem_id
,
156 madt
->header
.oem_table_id
);
162 * acpi_register_lapic - register a local apic and generates a logic cpu number
163 * @id: local apic id to register
164 * @enabled: this cpu is enabled or not
166 * Returns the logic cpu number which maps to the local apic
168 static int acpi_register_lapic(int id
, u8 enabled
)
170 unsigned int ver
= 0;
172 if (id
>= MAX_LOCAL_APIC
) {
173 printk(KERN_INFO PREFIX
"skipped apicid that is too big\n");
182 if (boot_cpu_physical_apicid
!= -1U)
183 ver
= apic_version
[boot_cpu_physical_apicid
];
185 return generic_processor_info(id
, ver
);
189 acpi_parse_x2apic(struct acpi_subtable_header
*header
, const unsigned long end
)
191 struct acpi_madt_local_x2apic
*processor
= NULL
;
195 processor
= (struct acpi_madt_local_x2apic
*)header
;
197 if (BAD_MADT_ENTRY(processor
, end
))
200 acpi_table_print_madt_entry(header
);
202 apic_id
= processor
->local_apic_id
;
203 enabled
= processor
->lapic_flags
& ACPI_MADT_ENABLED
;
204 #ifdef CONFIG_X86_X2APIC
206 * We need to register disabled CPU as well to permit
207 * counting disabled CPUs. This allows us to size
208 * cpus_possible_map more accurately, to permit
209 * to not preallocating memory for all NR_CPUS
210 * when we use CPU hotplug.
212 if (!apic
->apic_id_valid(apic_id
) && enabled
)
213 printk(KERN_WARNING PREFIX
"x2apic entry ignored\n");
215 acpi_register_lapic(apic_id
, enabled
);
217 printk(KERN_WARNING PREFIX
"x2apic entry ignored\n");
224 acpi_parse_lapic(struct acpi_subtable_header
* header
, const unsigned long end
)
226 struct acpi_madt_local_apic
*processor
= NULL
;
228 processor
= (struct acpi_madt_local_apic
*)header
;
230 if (BAD_MADT_ENTRY(processor
, end
))
233 acpi_table_print_madt_entry(header
);
236 * We need to register disabled CPU as well to permit
237 * counting disabled CPUs. This allows us to size
238 * cpus_possible_map more accurately, to permit
239 * to not preallocating memory for all NR_CPUS
240 * when we use CPU hotplug.
242 acpi_register_lapic(processor
->id
, /* APIC ID */
243 processor
->lapic_flags
& ACPI_MADT_ENABLED
);
249 acpi_parse_sapic(struct acpi_subtable_header
*header
, const unsigned long end
)
251 struct acpi_madt_local_sapic
*processor
= NULL
;
253 processor
= (struct acpi_madt_local_sapic
*)header
;
255 if (BAD_MADT_ENTRY(processor
, end
))
258 acpi_table_print_madt_entry(header
);
260 acpi_register_lapic((processor
->id
<< 8) | processor
->eid
,/* APIC ID */
261 processor
->lapic_flags
& ACPI_MADT_ENABLED
);
267 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header
* header
,
268 const unsigned long end
)
270 struct acpi_madt_local_apic_override
*lapic_addr_ovr
= NULL
;
272 lapic_addr_ovr
= (struct acpi_madt_local_apic_override
*)header
;
274 if (BAD_MADT_ENTRY(lapic_addr_ovr
, end
))
277 acpi_lapic_addr
= lapic_addr_ovr
->address
;
283 acpi_parse_x2apic_nmi(struct acpi_subtable_header
*header
,
284 const unsigned long end
)
286 struct acpi_madt_local_x2apic_nmi
*x2apic_nmi
= NULL
;
288 x2apic_nmi
= (struct acpi_madt_local_x2apic_nmi
*)header
;
290 if (BAD_MADT_ENTRY(x2apic_nmi
, end
))
293 acpi_table_print_madt_entry(header
);
295 if (x2apic_nmi
->lint
!= 1)
296 printk(KERN_WARNING PREFIX
"NMI not connected to LINT 1!\n");
302 acpi_parse_lapic_nmi(struct acpi_subtable_header
* header
, const unsigned long end
)
304 struct acpi_madt_local_apic_nmi
*lapic_nmi
= NULL
;
306 lapic_nmi
= (struct acpi_madt_local_apic_nmi
*)header
;
308 if (BAD_MADT_ENTRY(lapic_nmi
, end
))
311 acpi_table_print_madt_entry(header
);
313 if (lapic_nmi
->lint
!= 1)
314 printk(KERN_WARNING PREFIX
"NMI not connected to LINT 1!\n");
319 #endif /*CONFIG_X86_LOCAL_APIC */
321 #ifdef CONFIG_X86_IO_APIC
324 static void __init
mp_override_legacy_irq(u8 bus_irq
, u8 polarity
, u8 trigger
,
329 struct mpc_intsrc mp_irq
;
332 * Convert 'gsi' to 'ioapic.pin'.
334 ioapic
= mp_find_ioapic(gsi
);
337 pin
= mp_find_ioapic_pin(ioapic
, gsi
);
340 * TBD: This check is for faulty timer entries, where the override
341 * erroneously sets the trigger to level, resulting in a HUGE
342 * increase of timer interrupts!
344 if ((bus_irq
== 0) && (trigger
== 3))
347 mp_irq
.type
= MP_INTSRC
;
348 mp_irq
.irqtype
= mp_INT
;
349 mp_irq
.irqflag
= (trigger
<< 2) | polarity
;
350 mp_irq
.srcbus
= MP_ISA_BUS
;
351 mp_irq
.srcbusirq
= bus_irq
; /* IRQ */
352 mp_irq
.dstapic
= mpc_ioapic_id(ioapic
); /* APIC ID */
353 mp_irq
.dstirq
= pin
; /* INTIN# */
355 mp_save_irq(&mp_irq
);
358 * Reset default identity mapping if gsi is also an legacy IRQ,
359 * otherwise there will be more than one entry with the same GSI
360 * and acpi_isa_irq_to_gsi() may give wrong result.
362 if (gsi
< nr_legacy_irqs() && isa_irq_to_gsi
[gsi
] == gsi
)
363 isa_irq_to_gsi
[gsi
] = ACPI_INVALID_GSI
;
364 isa_irq_to_gsi
[bus_irq
] = gsi
;
367 static int mp_config_acpi_gsi(struct device
*dev
, u32 gsi
, int trigger
,
370 #ifdef CONFIG_X86_MPPARSE
371 struct mpc_intsrc mp_irq
;
372 struct pci_dev
*pdev
;
373 unsigned char number
;
380 if (!dev
|| !dev_is_pci(dev
))
383 pdev
= to_pci_dev(dev
);
384 number
= pdev
->bus
->number
;
387 /* print the entry should happen on mptable identically */
388 mp_irq
.type
= MP_INTSRC
;
389 mp_irq
.irqtype
= mp_INT
;
390 mp_irq
.irqflag
= (trigger
== ACPI_EDGE_SENSITIVE
? 4 : 0x0c) |
391 (polarity
== ACPI_ACTIVE_HIGH
? 1 : 3);
392 mp_irq
.srcbus
= number
;
393 mp_irq
.srcbusirq
= (((devfn
>> 3) & 0x1f) << 2) | ((pin
- 1) & 3);
394 ioapic
= mp_find_ioapic(gsi
);
395 mp_irq
.dstapic
= mpc_ioapic_id(ioapic
);
396 mp_irq
.dstirq
= mp_find_ioapic_pin(ioapic
, gsi
);
398 mp_save_irq(&mp_irq
);
403 static int mp_register_gsi(struct device
*dev
, u32 gsi
, int trigger
,
408 if (acpi_irq_model
!= ACPI_IRQ_MODEL_IOAPIC
)
411 trigger
= trigger
== ACPI_EDGE_SENSITIVE
? 0 : 1;
412 polarity
= polarity
== ACPI_ACTIVE_HIGH
? 0 : 1;
413 node
= dev
? dev_to_node(dev
) : NUMA_NO_NODE
;
414 if (mp_set_gsi_attr(gsi
, trigger
, polarity
, node
)) {
415 pr_warn("Failed to set pin attr for GSI%d\n", gsi
);
419 irq
= mp_map_gsi_to_irq(gsi
, IOAPIC_MAP_ALLOC
);
423 /* Don't set up the ACPI SCI because it's already set up */
424 if (enable_update_mptable
&& acpi_gbl_FADT
.sci_interrupt
!= gsi
)
425 mp_config_acpi_gsi(dev
, gsi
, trigger
, polarity
);
430 static void mp_unregister_gsi(u32 gsi
)
434 if (acpi_irq_model
!= ACPI_IRQ_MODEL_IOAPIC
)
437 irq
= mp_map_gsi_to_irq(gsi
, 0);
442 static struct irq_domain_ops acpi_irqdomain_ops
= {
443 .map
= mp_irqdomain_map
,
444 .unmap
= mp_irqdomain_unmap
,
448 acpi_parse_ioapic(struct acpi_subtable_header
* header
, const unsigned long end
)
450 struct acpi_madt_io_apic
*ioapic
= NULL
;
451 struct ioapic_domain_cfg cfg
= {
452 .type
= IOAPIC_DOMAIN_DYNAMIC
,
453 .ops
= &acpi_irqdomain_ops
,
456 ioapic
= (struct acpi_madt_io_apic
*)header
;
458 if (BAD_MADT_ENTRY(ioapic
, end
))
461 acpi_table_print_madt_entry(header
);
463 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
464 if (ioapic
->global_irq_base
< nr_legacy_irqs())
465 cfg
.type
= IOAPIC_DOMAIN_LEGACY
;
467 mp_register_ioapic(ioapic
->id
, ioapic
->address
, ioapic
->global_irq_base
,
474 * Parse Interrupt Source Override for the ACPI SCI
476 static void __init
acpi_sci_ioapic_setup(u8 bus_irq
, u16 polarity
, u16 trigger
, u32 gsi
)
478 if (trigger
== 0) /* compatible SCI trigger is level */
481 if (polarity
== 0) /* compatible SCI polarity is low */
484 /* Command-line over-ride via acpi_sci= */
485 if (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
)
486 trigger
= (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2;
488 if (acpi_sci_flags
& ACPI_MADT_POLARITY_MASK
)
489 polarity
= acpi_sci_flags
& ACPI_MADT_POLARITY_MASK
;
491 mp_override_legacy_irq(bus_irq
, polarity
, trigger
, gsi
);
494 * stash over-ride to indicate we've been here
495 * and for later update of acpi_gbl_FADT
497 acpi_sci_override_gsi
= gsi
;
502 acpi_parse_int_src_ovr(struct acpi_subtable_header
* header
,
503 const unsigned long end
)
505 struct acpi_madt_interrupt_override
*intsrc
= NULL
;
507 intsrc
= (struct acpi_madt_interrupt_override
*)header
;
509 if (BAD_MADT_ENTRY(intsrc
, end
))
512 acpi_table_print_madt_entry(header
);
514 if (intsrc
->source_irq
== acpi_gbl_FADT
.sci_interrupt
) {
515 acpi_sci_ioapic_setup(intsrc
->source_irq
,
516 intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
,
517 (intsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2,
522 if (intsrc
->source_irq
== 0) {
523 if (acpi_skip_timer_override
) {
524 printk(PREFIX
"BIOS IRQ0 override ignored.\n");
528 if ((intsrc
->global_irq
== 2) && acpi_fix_pin2_polarity
529 && (intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
)) {
530 intsrc
->inti_flags
&= ~ACPI_MADT_POLARITY_MASK
;
531 printk(PREFIX
"BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
535 mp_override_legacy_irq(intsrc
->source_irq
,
536 intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
,
537 (intsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2,
544 acpi_parse_nmi_src(struct acpi_subtable_header
* header
, const unsigned long end
)
546 struct acpi_madt_nmi_source
*nmi_src
= NULL
;
548 nmi_src
= (struct acpi_madt_nmi_source
*)header
;
550 if (BAD_MADT_ENTRY(nmi_src
, end
))
553 acpi_table_print_madt_entry(header
);
555 /* TBD: Support nimsrc entries? */
560 #endif /* CONFIG_X86_IO_APIC */
563 * acpi_pic_sci_set_trigger()
565 * use ELCR to set PIC-mode trigger type for SCI
567 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
568 * it may require Edge Trigger -- use "acpi_sci=edge"
570 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
571 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
572 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
573 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
576 void __init
acpi_pic_sci_set_trigger(unsigned int irq
, u16 trigger
)
578 unsigned int mask
= 1 << irq
;
579 unsigned int old
, new;
581 /* Real old ELCR mask */
582 old
= inb(0x4d0) | (inb(0x4d1) << 8);
585 * If we use ACPI to set PCI IRQs, then we should clear ELCR
586 * since we will set it correctly as we enable the PCI irq
589 new = acpi_noirq
? old
: 0;
592 * Update SCI information in the ELCR, it isn't in the PCI
596 case 1: /* Edge - clear */
599 case 3: /* Level - set */
607 printk(PREFIX
"setting ELCR to %04x (from %04x)\n", new, old
);
609 outb(new >> 8, 0x4d1);
612 int acpi_gsi_to_irq(u32 gsi
, unsigned int *irqp
)
614 int rc
, irq
, trigger
, polarity
;
616 if (acpi_irq_model
== ACPI_IRQ_MODEL_PIC
) {
621 rc
= acpi_get_override_irq(gsi
, &trigger
, &polarity
);
623 trigger
= trigger
? ACPI_LEVEL_SENSITIVE
: ACPI_EDGE_SENSITIVE
;
624 polarity
= polarity
? ACPI_ACTIVE_LOW
: ACPI_ACTIVE_HIGH
;
625 irq
= acpi_register_gsi(NULL
, gsi
, trigger
, polarity
);
634 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq
);
636 int acpi_isa_irq_to_gsi(unsigned isa_irq
, u32
*gsi
)
638 if (isa_irq
< nr_legacy_irqs() &&
639 isa_irq_to_gsi
[isa_irq
] != ACPI_INVALID_GSI
) {
640 *gsi
= isa_irq_to_gsi
[isa_irq
];
647 static int acpi_register_gsi_pic(struct device
*dev
, u32 gsi
,
648 int trigger
, int polarity
)
652 * Make sure all (legacy) PCI IRQs are set as level-triggered.
654 if (trigger
== ACPI_LEVEL_SENSITIVE
)
655 eisa_set_level_irq(gsi
);
661 #ifdef CONFIG_X86_LOCAL_APIC
662 static int acpi_register_gsi_ioapic(struct device
*dev
, u32 gsi
,
663 int trigger
, int polarity
)
667 #ifdef CONFIG_X86_IO_APIC
668 mutex_lock(&acpi_ioapic_lock
);
669 irq
= mp_register_gsi(dev
, gsi
, trigger
, polarity
);
670 mutex_unlock(&acpi_ioapic_lock
);
676 static void acpi_unregister_gsi_ioapic(u32 gsi
)
678 #ifdef CONFIG_X86_IO_APIC
679 mutex_lock(&acpi_ioapic_lock
);
680 mp_unregister_gsi(gsi
);
681 mutex_unlock(&acpi_ioapic_lock
);
686 int (*__acpi_register_gsi
)(struct device
*dev
, u32 gsi
,
687 int trigger
, int polarity
) = acpi_register_gsi_pic
;
688 void (*__acpi_unregister_gsi
)(u32 gsi
) = NULL
;
690 #ifdef CONFIG_ACPI_SLEEP
691 int (*acpi_suspend_lowlevel
)(void) = x86_acpi_suspend_lowlevel
;
693 int (*acpi_suspend_lowlevel
)(void);
697 * success: return IRQ number (>=0)
698 * failure: return < 0
700 int acpi_register_gsi(struct device
*dev
, u32 gsi
, int trigger
, int polarity
)
702 return __acpi_register_gsi(dev
, gsi
, trigger
, polarity
);
704 EXPORT_SYMBOL_GPL(acpi_register_gsi
);
706 void acpi_unregister_gsi(u32 gsi
)
708 if (__acpi_unregister_gsi
)
709 __acpi_unregister_gsi(gsi
);
711 EXPORT_SYMBOL_GPL(acpi_unregister_gsi
);
713 #ifdef CONFIG_X86_LOCAL_APIC
714 static void __init
acpi_set_irq_model_ioapic(void)
716 acpi_irq_model
= ACPI_IRQ_MODEL_IOAPIC
;
717 __acpi_register_gsi
= acpi_register_gsi_ioapic
;
718 __acpi_unregister_gsi
= acpi_unregister_gsi_ioapic
;
724 * ACPI based hotplug support for CPU
726 #ifdef CONFIG_ACPI_HOTPLUG_CPU
727 #include <acpi/processor.h>
729 static void acpi_map_cpu2node(acpi_handle handle
, int cpu
, int physid
)
731 #ifdef CONFIG_ACPI_NUMA
734 nid
= acpi_get_node(handle
);
736 set_apicid_to_node(physid
, nid
);
737 numa_set_node(cpu
, nid
);
742 static int _acpi_map_lsapic(acpi_handle handle
, int physid
, int *pcpu
)
746 cpu
= acpi_register_lapic(physid
, ACPI_MADT_ENABLED
);
748 pr_info(PREFIX
"Unable to map lapic to logical cpu number\n");
752 acpi_processor_set_pdc(handle
);
753 acpi_map_cpu2node(handle
, cpu
, physid
);
759 /* wrapper to silence section mismatch warning */
760 int __ref
acpi_map_cpu(acpi_handle handle
, int physid
, int *pcpu
)
762 return _acpi_map_lsapic(handle
, physid
, pcpu
);
764 EXPORT_SYMBOL(acpi_map_cpu
);
766 int acpi_unmap_cpu(int cpu
)
768 #ifdef CONFIG_ACPI_NUMA
769 set_apicid_to_node(per_cpu(x86_cpu_to_apicid
, cpu
), NUMA_NO_NODE
);
772 per_cpu(x86_cpu_to_apicid
, cpu
) = -1;
773 set_cpu_present(cpu
, false);
778 EXPORT_SYMBOL(acpi_unmap_cpu
);
779 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
781 int acpi_register_ioapic(acpi_handle handle
, u64 phys_addr
, u32 gsi_base
)
784 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
787 struct ioapic_domain_cfg cfg
= {
788 .type
= IOAPIC_DOMAIN_DYNAMIC
,
789 .ops
= &acpi_irqdomain_ops
,
792 ioapic_id
= acpi_get_ioapic_id(handle
, gsi_base
, &addr
);
794 unsigned long long uid
;
797 status
= acpi_evaluate_integer(handle
, METHOD_NAME__UID
,
799 if (ACPI_FAILURE(status
)) {
800 acpi_handle_warn(handle
, "failed to get IOAPIC ID.\n");
803 ioapic_id
= (int)uid
;
806 mutex_lock(&acpi_ioapic_lock
);
807 ret
= mp_register_ioapic(ioapic_id
, phys_addr
, gsi_base
, &cfg
);
808 mutex_unlock(&acpi_ioapic_lock
);
813 EXPORT_SYMBOL(acpi_register_ioapic
);
815 int acpi_unregister_ioapic(acpi_handle handle
, u32 gsi_base
)
819 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
820 mutex_lock(&acpi_ioapic_lock
);
821 ret
= mp_unregister_ioapic(gsi_base
);
822 mutex_unlock(&acpi_ioapic_lock
);
827 EXPORT_SYMBOL(acpi_unregister_ioapic
);
830 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
831 * has been registered
832 * @handle: ACPI handle of the IOAPIC deivce
833 * @gsi_base: GSI base associated with the IOAPIC
835 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
836 * with acpi_register_ioapic()/acpi_unregister_ioapic().
838 int acpi_ioapic_registered(acpi_handle handle
, u32 gsi_base
)
842 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
843 mutex_lock(&acpi_ioapic_lock
);
844 ret
= mp_ioapic_registered(gsi_base
);
845 mutex_unlock(&acpi_ioapic_lock
);
851 static int __init
acpi_parse_sbf(struct acpi_table_header
*table
)
853 struct acpi_table_boot
*sb
= (struct acpi_table_boot
*)table
;
855 sbf_port
= sb
->cmos_index
; /* Save CMOS port */
860 #ifdef CONFIG_HPET_TIMER
861 #include <asm/hpet.h>
863 static struct resource
*hpet_res __initdata
;
865 static int __init
acpi_parse_hpet(struct acpi_table_header
*table
)
867 struct acpi_table_hpet
*hpet_tbl
= (struct acpi_table_hpet
*)table
;
869 if (hpet_tbl
->address
.space_id
!= ACPI_SPACE_MEM
) {
870 printk(KERN_WARNING PREFIX
"HPET timers must be located in "
875 hpet_address
= hpet_tbl
->address
.address
;
876 hpet_blockid
= hpet_tbl
->sequence
;
879 * Some broken BIOSes advertise HPET at 0x0. We really do not
880 * want to allocate a resource there.
883 printk(KERN_WARNING PREFIX
884 "HPET id: %#x base: %#lx is invalid\n",
885 hpet_tbl
->id
, hpet_address
);
890 * Some even more broken BIOSes advertise HPET at
891 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
894 if (hpet_address
== 0xfed0000000000000UL
) {
895 if (!hpet_force_user
) {
896 printk(KERN_WARNING PREFIX
"HPET id: %#x "
897 "base: 0xfed0000000000000 is bogus\n "
898 "try hpet=force on the kernel command line to "
899 "fix it up to 0xfed00000.\n", hpet_tbl
->id
);
903 printk(KERN_WARNING PREFIX
904 "HPET id: %#x base: 0xfed0000000000000 fixed up "
905 "to 0xfed00000.\n", hpet_tbl
->id
);
909 printk(KERN_INFO PREFIX
"HPET id: %#x base: %#lx\n",
910 hpet_tbl
->id
, hpet_address
);
913 * Allocate and initialize the HPET firmware resource for adding into
914 * the resource tree during the lateinit timeframe.
916 #define HPET_RESOURCE_NAME_SIZE 9
917 hpet_res
= alloc_bootmem(sizeof(*hpet_res
) + HPET_RESOURCE_NAME_SIZE
);
919 hpet_res
->name
= (void *)&hpet_res
[1];
920 hpet_res
->flags
= IORESOURCE_MEM
;
921 snprintf((char *)hpet_res
->name
, HPET_RESOURCE_NAME_SIZE
, "HPET %u",
924 hpet_res
->start
= hpet_address
;
925 hpet_res
->end
= hpet_address
+ (1 * 1024) - 1;
931 * hpet_insert_resource inserts the HPET resources used into the resource
934 static __init
int hpet_insert_resource(void)
939 return insert_resource(&iomem_resource
, hpet_res
);
942 late_initcall(hpet_insert_resource
);
945 #define acpi_parse_hpet NULL
948 static int __init
acpi_parse_fadt(struct acpi_table_header
*table
)
951 #ifdef CONFIG_X86_PM_TIMER
952 /* detect the location of the ACPI PM Timer */
953 if (acpi_gbl_FADT
.header
.revision
>= FADT2_REVISION_ID
) {
955 if (acpi_gbl_FADT
.xpm_timer_block
.space_id
!=
956 ACPI_ADR_SPACE_SYSTEM_IO
)
959 pmtmr_ioport
= acpi_gbl_FADT
.xpm_timer_block
.address
;
961 * "X" fields are optional extensions to the original V1.0
962 * fields, so we must selectively expand V1.0 fields if the
963 * corresponding X field is zero.
966 pmtmr_ioport
= acpi_gbl_FADT
.pm_timer_block
;
969 pmtmr_ioport
= acpi_gbl_FADT
.pm_timer_block
;
972 printk(KERN_INFO PREFIX
"PM-Timer IO Port: %#x\n",
978 #ifdef CONFIG_X86_LOCAL_APIC
980 * Parse LAPIC entries in MADT
981 * returns 0 on success, < 0 on error
984 static int __init
early_acpi_parse_madt_lapic_addr_ovr(void)
992 * Note that the LAPIC address is obtained from the MADT (32-bit value)
993 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
996 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE
,
997 acpi_parse_lapic_addr_ovr
, 0);
999 printk(KERN_ERR PREFIX
1000 "Error parsing LAPIC address override entry\n");
1004 register_lapic_address(acpi_lapic_addr
);
1009 static int __init
acpi_parse_madt_lapic_entries(void)
1018 * Note that the LAPIC address is obtained from the MADT (32-bit value)
1019 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
1022 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE
,
1023 acpi_parse_lapic_addr_ovr
, 0);
1025 printk(KERN_ERR PREFIX
1026 "Error parsing LAPIC address override entry\n");
1030 register_lapic_address(acpi_lapic_addr
);
1032 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC
,
1033 acpi_parse_sapic
, MAX_LOCAL_APIC
);
1036 x2count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC
,
1037 acpi_parse_x2apic
, MAX_LOCAL_APIC
);
1038 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC
,
1039 acpi_parse_lapic
, MAX_LOCAL_APIC
);
1041 if (!count
&& !x2count
) {
1042 printk(KERN_ERR PREFIX
"No LAPIC entries present\n");
1043 /* TBD: Cleanup to allow fallback to MPS */
1045 } else if (count
< 0 || x2count
< 0) {
1046 printk(KERN_ERR PREFIX
"Error parsing LAPIC entry\n");
1047 /* TBD: Cleanup to allow fallback to MPS */
1051 x2count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI
,
1052 acpi_parse_x2apic_nmi
, 0);
1053 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI
,
1054 acpi_parse_lapic_nmi
, 0);
1055 if (count
< 0 || x2count
< 0) {
1056 printk(KERN_ERR PREFIX
"Error parsing LAPIC NMI entry\n");
1057 /* TBD: Cleanup to allow fallback to MPS */
1062 #endif /* CONFIG_X86_LOCAL_APIC */
1064 #ifdef CONFIG_X86_IO_APIC
1065 static void __init
mp_config_acpi_legacy_irqs(void)
1068 struct mpc_intsrc mp_irq
;
1072 * Fabricate the legacy ISA bus (bus #31).
1074 mp_bus_id_to_type
[MP_ISA_BUS
] = MP_BUS_ISA
;
1076 set_bit(MP_ISA_BUS
, mp_bus_not_pci
);
1077 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS
);
1080 * Use the default configuration for the IRQs 0-15. Unless
1081 * overridden by (MADT) interrupt source override entries.
1083 for (i
= 0; i
< nr_legacy_irqs(); i
++) {
1085 unsigned int dstapic
;
1089 /* Locate the gsi that irq i maps to. */
1090 if (acpi_isa_irq_to_gsi(i
, &gsi
))
1094 * Locate the IOAPIC that manages the ISA IRQ.
1096 ioapic
= mp_find_ioapic(gsi
);
1099 pin
= mp_find_ioapic_pin(ioapic
, gsi
);
1100 dstapic
= mpc_ioapic_id(ioapic
);
1102 for (idx
= 0; idx
< mp_irq_entries
; idx
++) {
1103 struct mpc_intsrc
*irq
= mp_irqs
+ idx
;
1105 /* Do we already have a mapping for this ISA IRQ? */
1106 if (irq
->srcbus
== MP_ISA_BUS
&& irq
->srcbusirq
== i
)
1109 /* Do we already have a mapping for this IOAPIC pin */
1110 if (irq
->dstapic
== dstapic
&& irq
->dstirq
== pin
)
1114 if (idx
!= mp_irq_entries
) {
1115 printk(KERN_DEBUG
"ACPI: IRQ%d used by override.\n", i
);
1116 continue; /* IRQ already used */
1119 mp_irq
.type
= MP_INTSRC
;
1120 mp_irq
.irqflag
= 0; /* Conforming */
1121 mp_irq
.srcbus
= MP_ISA_BUS
;
1122 mp_irq
.dstapic
= dstapic
;
1123 mp_irq
.irqtype
= mp_INT
;
1124 mp_irq
.srcbusirq
= i
; /* Identity mapped */
1125 mp_irq
.dstirq
= pin
;
1127 mp_save_irq(&mp_irq
);
1132 * Parse IOAPIC related entries in MADT
1133 * returns 0 on success, < 0 on error
1135 static int __init
acpi_parse_madt_ioapic_entries(void)
1140 * ACPI interpreter is required to complete interrupt setup,
1141 * so if it is off, don't enumerate the io-apics with ACPI.
1142 * If MPS is present, it will handle them,
1143 * otherwise the system will stay in PIC mode
1145 if (acpi_disabled
|| acpi_noirq
)
1152 * if "noapic" boot option, don't look for IO-APICs
1154 if (skip_ioapic_setup
) {
1155 printk(KERN_INFO PREFIX
"Skipping IOAPIC probe "
1156 "due to 'noapic' option.\n");
1160 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC
, acpi_parse_ioapic
,
1163 printk(KERN_ERR PREFIX
"No IOAPIC entries present\n");
1165 } else if (count
< 0) {
1166 printk(KERN_ERR PREFIX
"Error parsing IOAPIC entry\n");
1170 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE
,
1171 acpi_parse_int_src_ovr
, nr_irqs
);
1173 printk(KERN_ERR PREFIX
1174 "Error parsing interrupt source overrides entry\n");
1175 /* TBD: Cleanup to allow fallback to MPS */
1180 * If BIOS did not supply an INT_SRC_OVR for the SCI
1181 * pretend we got one so we can set the SCI flags.
1183 if (!acpi_sci_override_gsi
)
1184 acpi_sci_ioapic_setup(acpi_gbl_FADT
.sci_interrupt
, 0, 0,
1185 acpi_gbl_FADT
.sci_interrupt
);
1187 /* Fill in identity legacy mappings where no override */
1188 mp_config_acpi_legacy_irqs();
1190 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE
,
1191 acpi_parse_nmi_src
, nr_irqs
);
1193 printk(KERN_ERR PREFIX
"Error parsing NMI SRC entry\n");
1194 /* TBD: Cleanup to allow fallback to MPS */
1201 static inline int acpi_parse_madt_ioapic_entries(void)
1205 #endif /* !CONFIG_X86_IO_APIC */
1207 static void __init
early_acpi_process_madt(void)
1209 #ifdef CONFIG_X86_LOCAL_APIC
1212 if (!acpi_table_parse(ACPI_SIG_MADT
, acpi_parse_madt
)) {
1215 * Parse MADT LAPIC entries
1217 error
= early_acpi_parse_madt_lapic_addr_ovr();
1220 smp_found_config
= 1;
1222 if (error
== -EINVAL
) {
1224 * Dell Precision Workstation 410, 610 come here.
1226 printk(KERN_ERR PREFIX
1227 "Invalid BIOS MADT, disabling ACPI\n");
1234 static void __init
acpi_process_madt(void)
1236 #ifdef CONFIG_X86_LOCAL_APIC
1239 if (!acpi_table_parse(ACPI_SIG_MADT
, acpi_parse_madt
)) {
1242 * Parse MADT LAPIC entries
1244 error
= acpi_parse_madt_lapic_entries();
1249 * Parse MADT IO-APIC entries
1251 mutex_lock(&acpi_ioapic_lock
);
1252 error
= acpi_parse_madt_ioapic_entries();
1253 mutex_unlock(&acpi_ioapic_lock
);
1255 acpi_set_irq_model_ioapic();
1257 smp_found_config
= 1;
1260 if (error
== -EINVAL
) {
1262 * Dell Precision Workstation 410, 610 come here.
1264 printk(KERN_ERR PREFIX
1265 "Invalid BIOS MADT, disabling ACPI\n");
1270 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1271 * In the event an MPS table was found, forget it.
1272 * Boot with "acpi=off" to use MPS on such a system.
1274 if (smp_found_config
) {
1275 printk(KERN_WARNING PREFIX
1276 "No APIC-table, disabling MPS\n");
1277 smp_found_config
= 0;
1282 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1283 * processors, where MPS only supports physical.
1285 if (acpi_lapic
&& acpi_ioapic
)
1286 printk(KERN_INFO
"Using ACPI (MADT) for SMP configuration "
1288 else if (acpi_lapic
)
1289 printk(KERN_INFO
"Using ACPI for processor (LAPIC) "
1290 "configuration information\n");
1295 static int __init
disable_acpi_irq(const struct dmi_system_id
*d
)
1298 printk(KERN_NOTICE
"%s detected: force use of acpi=noirq\n",
1305 static int __init
disable_acpi_pci(const struct dmi_system_id
*d
)
1308 printk(KERN_NOTICE
"%s detected: force use of pci=noacpi\n",
1315 static int __init
dmi_disable_acpi(const struct dmi_system_id
*d
)
1318 printk(KERN_NOTICE
"%s detected: acpi off\n", d
->ident
);
1322 "Warning: DMI blacklist says broken, but acpi forced\n");
1328 * Force ignoring BIOS IRQ0 override
1330 static int __init
dmi_ignore_irq0_timer_override(const struct dmi_system_id
*d
)
1332 if (!acpi_skip_timer_override
) {
1333 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1335 acpi_skip_timer_override
= 1;
1341 * ACPI offers an alternative platform interface model that removes
1342 * ACPI hardware requirements for platforms that do not implement
1343 * the PC Architecture.
1345 * We initialize the Hardware-reduced ACPI model here:
1347 static void __init
acpi_reduced_hw_init(void)
1349 if (acpi_gbl_reduced_hardware
) {
1351 * Override x86_init functions and bypass legacy pic
1352 * in Hardware-reduced ACPI mode
1354 x86_init
.timers
.timer_init
= x86_init_noop
;
1355 x86_init
.irqs
.pre_vector_init
= x86_init_noop
;
1356 legacy_pic
= &null_legacy_pic
;
1361 * If your system is blacklisted here, but you find that acpi=force
1362 * works for you, please contact linux-acpi@vger.kernel.org
1364 static struct dmi_system_id __initdata acpi_dmi_table
[] = {
1366 * Boxes that need ACPI disabled
1369 .callback
= dmi_disable_acpi
,
1370 .ident
= "IBM Thinkpad",
1372 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1373 DMI_MATCH(DMI_BOARD_NAME
, "2629H1G"),
1378 * Boxes that need ACPI PCI IRQ routing disabled
1381 .callback
= disable_acpi_irq
,
1382 .ident
= "ASUS A7V",
1384 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC"),
1385 DMI_MATCH(DMI_BOARD_NAME
, "<A7V>"),
1386 /* newer BIOS, Revision 1011, does work */
1387 DMI_MATCH(DMI_BIOS_VERSION
,
1388 "ASUS A7V ACPI BIOS Revision 1007"),
1393 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1394 * for LPC bridge, which is needed for the PCI
1395 * interrupt links to work. DSDT fix is in bug 5966.
1396 * 2645, 2646 model numbers are shared with 600/600E/600X
1398 .callback
= disable_acpi_irq
,
1399 .ident
= "IBM Thinkpad 600 Series 2645",
1401 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1402 DMI_MATCH(DMI_BOARD_NAME
, "2645"),
1406 .callback
= disable_acpi_irq
,
1407 .ident
= "IBM Thinkpad 600 Series 2646",
1409 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1410 DMI_MATCH(DMI_BOARD_NAME
, "2646"),
1414 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1417 .callback
= disable_acpi_pci
,
1418 .ident
= "ASUS PR-DLS",
1420 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1421 DMI_MATCH(DMI_BOARD_NAME
, "PR-DLS"),
1422 DMI_MATCH(DMI_BIOS_VERSION
,
1423 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1424 DMI_MATCH(DMI_BIOS_DATE
, "03/21/2003")
1428 .callback
= disable_acpi_pci
,
1429 .ident
= "Acer TravelMate 36x Laptop",
1431 DMI_MATCH(DMI_SYS_VENDOR
, "Acer"),
1432 DMI_MATCH(DMI_PRODUCT_NAME
, "TravelMate 360"),
1438 /* second table for DMI checks that should run after early-quirks */
1439 static struct dmi_system_id __initdata acpi_dmi_table_late
[] = {
1441 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1442 * which includes some code which overrides all temperature
1443 * trip points to 16C if the INTIN2 input of the I/O APIC
1444 * is enabled. This input is incorrectly designated the
1445 * ISA IRQ 0 via an interrupt source override even though
1446 * it is wired to the output of the master 8259A and INTIN0
1447 * is not connected at all. Force ignoring BIOS IRQ0
1448 * override in that cases.
1451 .callback
= dmi_ignore_irq0_timer_override
,
1452 .ident
= "HP nx6115 laptop",
1454 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1455 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq nx6115"),
1459 .callback
= dmi_ignore_irq0_timer_override
,
1460 .ident
= "HP NX6125 laptop",
1462 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1463 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq nx6125"),
1467 .callback
= dmi_ignore_irq0_timer_override
,
1468 .ident
= "HP NX6325 laptop",
1470 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1471 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq nx6325"),
1475 .callback
= dmi_ignore_irq0_timer_override
,
1476 .ident
= "HP 6715b laptop",
1478 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1479 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq 6715b"),
1483 .callback
= dmi_ignore_irq0_timer_override
,
1484 .ident
= "FUJITSU SIEMENS",
1486 DMI_MATCH(DMI_SYS_VENDOR
, "FUJITSU SIEMENS"),
1487 DMI_MATCH(DMI_PRODUCT_NAME
, "AMILO PRO V2030"),
1494 * acpi_boot_table_init() and acpi_boot_init()
1495 * called from setup_arch(), always.
1496 * 1. checksums all tables
1497 * 2. enumerates lapics
1498 * 3. enumerates io-apics
1500 * acpi_table_init() is separate to allow reading SRAT without
1501 * other side effects.
1503 * side effects of acpi_boot_init:
1504 * acpi_lapic = 1 if LAPIC found
1505 * acpi_ioapic = 1 if IOAPIC found
1506 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1507 * if acpi_blacklisted() acpi_disabled = 1;
1508 * acpi_irq_model=...
1512 void __init
acpi_boot_table_init(void)
1514 dmi_check_system(acpi_dmi_table
);
1517 * If acpi_disabled, bail out
1523 * Initialize the ACPI boot-time table parser.
1525 if (acpi_table_init()) {
1530 acpi_table_parse(ACPI_SIG_BOOT
, acpi_parse_sbf
);
1533 * blacklist may disable ACPI entirely
1535 if (acpi_blacklisted()) {
1537 printk(KERN_WARNING PREFIX
"acpi=force override\n");
1539 printk(KERN_WARNING PREFIX
"Disabling ACPI support\n");
1546 int __init
early_acpi_boot_init(void)
1549 * If acpi_disabled, bail out
1555 * Process the Multiple APIC Description Table (MADT), if present
1557 early_acpi_process_madt();
1560 * Hardware-reduced ACPI mode initialization:
1562 acpi_reduced_hw_init();
1567 int __init
acpi_boot_init(void)
1569 /* those are executed after early-quirks are executed */
1570 dmi_check_system(acpi_dmi_table_late
);
1573 * If acpi_disabled, bail out
1578 acpi_table_parse(ACPI_SIG_BOOT
, acpi_parse_sbf
);
1581 * set sci_int and PM timer address
1583 acpi_table_parse(ACPI_SIG_FADT
, acpi_parse_fadt
);
1586 * Process the Multiple APIC Description Table (MADT), if present
1588 acpi_process_madt();
1590 acpi_table_parse(ACPI_SIG_HPET
, acpi_parse_hpet
);
1593 x86_init
.pci
.init
= pci_acpi_init
;
1598 static int __init
parse_acpi(char *arg
)
1603 /* "acpi=off" disables both ACPI table parsing and interpreter */
1604 if (strcmp(arg
, "off") == 0) {
1607 /* acpi=force to over-ride black-list */
1608 else if (strcmp(arg
, "force") == 0) {
1612 /* acpi=strict disables out-of-spec workarounds */
1613 else if (strcmp(arg
, "strict") == 0) {
1616 /* acpi=rsdt use RSDT instead of XSDT */
1617 else if (strcmp(arg
, "rsdt") == 0) {
1618 acpi_gbl_do_not_use_xsdt
= TRUE
;
1620 /* "acpi=noirq" disables ACPI interrupt routing */
1621 else if (strcmp(arg
, "noirq") == 0) {
1624 /* "acpi=copy_dsdt" copys DSDT */
1625 else if (strcmp(arg
, "copy_dsdt") == 0) {
1626 acpi_gbl_copy_dsdt_locally
= 1;
1628 /* "acpi=nocmcff" disables FF mode for corrected errors */
1629 else if (strcmp(arg
, "nocmcff") == 0) {
1630 acpi_disable_cmcff
= 1;
1632 /* Core will printk when we return error. */
1637 early_param("acpi", parse_acpi
);
1639 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1640 static int __init
parse_pci(char *arg
)
1642 if (arg
&& strcmp(arg
, "noacpi") == 0)
1646 early_param("pci", parse_pci
);
1648 int __init
acpi_mps_check(void)
1650 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1651 /* mptable code is not built-in*/
1652 if (acpi_disabled
|| acpi_noirq
) {
1653 printk(KERN_WARNING
"MPS support code is not built-in.\n"
1654 "Using acpi=off or acpi=noirq or pci=noacpi "
1655 "may have problem\n");
1662 #ifdef CONFIG_X86_IO_APIC
1663 static int __init
parse_acpi_skip_timer_override(char *arg
)
1665 acpi_skip_timer_override
= 1;
1668 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override
);
1670 static int __init
parse_acpi_use_timer_override(char *arg
)
1672 acpi_use_timer_override
= 1;
1675 early_param("acpi_use_timer_override", parse_acpi_use_timer_override
);
1676 #endif /* CONFIG_X86_IO_APIC */
1678 static int __init
setup_acpi_sci(char *s
)
1682 if (!strcmp(s
, "edge"))
1683 acpi_sci_flags
= ACPI_MADT_TRIGGER_EDGE
|
1684 (acpi_sci_flags
& ~ACPI_MADT_TRIGGER_MASK
);
1685 else if (!strcmp(s
, "level"))
1686 acpi_sci_flags
= ACPI_MADT_TRIGGER_LEVEL
|
1687 (acpi_sci_flags
& ~ACPI_MADT_TRIGGER_MASK
);
1688 else if (!strcmp(s
, "high"))
1689 acpi_sci_flags
= ACPI_MADT_POLARITY_ACTIVE_HIGH
|
1690 (acpi_sci_flags
& ~ACPI_MADT_POLARITY_MASK
);
1691 else if (!strcmp(s
, "low"))
1692 acpi_sci_flags
= ACPI_MADT_POLARITY_ACTIVE_LOW
|
1693 (acpi_sci_flags
& ~ACPI_MADT_POLARITY_MASK
);
1698 early_param("acpi_sci", setup_acpi_sci
);
1700 int __acpi_acquire_global_lock(unsigned int *lock
)
1702 unsigned int old
, new, val
;
1705 new = (((old
& ~0x3) + 2) + ((old
>> 1) & 0x1));
1706 val
= cmpxchg(lock
, old
, new);
1707 } while (unlikely (val
!= old
));
1708 return (new < 3) ? -1 : 0;
1711 int __acpi_release_global_lock(unsigned int *lock
)
1713 unsigned int old
, new, val
;
1717 val
= cmpxchg(lock
, old
, new);
1718 } while (unlikely (val
!= old
));
1722 void __init
arch_reserve_mem_area(acpi_physical_address addr
, size_t size
)
1724 e820_add_region(addr
, size
, E820_ACPI
);