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/export.h>
32 #include <linux/dmi.h>
33 #include <linux/irq.h>
34 #include <linux/slab.h>
35 #include <linux/bootmem.h>
36 #include <linux/ioport.h>
37 #include <linux/pci.h>
39 #include <asm/irqdomain.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
;
139 if (!boot_cpu_has(X86_FEATURE_APIC
))
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 * @acpiid: ACPI id to register
165 * @enabled: this cpu is enabled or not
167 * Returns the logic cpu number which maps to the local apic
169 static int acpi_register_lapic(int id
, u32 acpiid
, u8 enabled
)
171 unsigned int ver
= 0;
174 if (id
>= MAX_LOCAL_APIC
) {
175 printk(KERN_INFO PREFIX
"skipped apicid that is too big\n");
184 if (boot_cpu_physical_apicid
!= -1U)
185 ver
= apic_version
[boot_cpu_physical_apicid
];
187 cpu
= generic_processor_info(id
, ver
);
189 early_per_cpu(x86_cpu_to_acpiid
, cpu
) = acpiid
;
195 acpi_parse_x2apic(struct acpi_subtable_header
*header
, const unsigned long end
)
197 struct acpi_madt_local_x2apic
*processor
= NULL
;
201 processor
= (struct acpi_madt_local_x2apic
*)header
;
203 if (BAD_MADT_ENTRY(processor
, end
))
206 acpi_table_print_madt_entry(header
);
208 apic_id
= processor
->local_apic_id
;
209 enabled
= processor
->lapic_flags
& ACPI_MADT_ENABLED
;
210 #ifdef CONFIG_X86_X2APIC
212 * We need to register disabled CPU as well to permit
213 * counting disabled CPUs. This allows us to size
214 * cpus_possible_map more accurately, to permit
215 * to not preallocating memory for all NR_CPUS
216 * when we use CPU hotplug.
218 if (!apic
->apic_id_valid(apic_id
) && enabled
)
219 printk(KERN_WARNING PREFIX
"x2apic entry ignored\n");
221 acpi_register_lapic(apic_id
, processor
->uid
, enabled
);
223 printk(KERN_WARNING PREFIX
"x2apic entry ignored\n");
230 acpi_parse_lapic(struct acpi_subtable_header
* header
, const unsigned long end
)
232 struct acpi_madt_local_apic
*processor
= NULL
;
234 processor
= (struct acpi_madt_local_apic
*)header
;
236 if (BAD_MADT_ENTRY(processor
, end
))
239 acpi_table_print_madt_entry(header
);
242 * We need to register disabled CPU as well to permit
243 * counting disabled CPUs. This allows us to size
244 * cpus_possible_map more accurately, to permit
245 * to not preallocating memory for all NR_CPUS
246 * when we use CPU hotplug.
248 acpi_register_lapic(processor
->id
, /* APIC ID */
249 processor
->processor_id
, /* ACPI ID */
250 processor
->lapic_flags
& ACPI_MADT_ENABLED
);
256 acpi_parse_sapic(struct acpi_subtable_header
*header
, const unsigned long end
)
258 struct acpi_madt_local_sapic
*processor
= NULL
;
260 processor
= (struct acpi_madt_local_sapic
*)header
;
262 if (BAD_MADT_ENTRY(processor
, end
))
265 acpi_table_print_madt_entry(header
);
267 acpi_register_lapic((processor
->id
<< 8) | processor
->eid
,/* APIC ID */
268 processor
->processor_id
, /* ACPI ID */
269 processor
->lapic_flags
& ACPI_MADT_ENABLED
);
275 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header
* header
,
276 const unsigned long end
)
278 struct acpi_madt_local_apic_override
*lapic_addr_ovr
= NULL
;
280 lapic_addr_ovr
= (struct acpi_madt_local_apic_override
*)header
;
282 if (BAD_MADT_ENTRY(lapic_addr_ovr
, end
))
285 acpi_lapic_addr
= lapic_addr_ovr
->address
;
291 acpi_parse_x2apic_nmi(struct acpi_subtable_header
*header
,
292 const unsigned long end
)
294 struct acpi_madt_local_x2apic_nmi
*x2apic_nmi
= NULL
;
296 x2apic_nmi
= (struct acpi_madt_local_x2apic_nmi
*)header
;
298 if (BAD_MADT_ENTRY(x2apic_nmi
, end
))
301 acpi_table_print_madt_entry(header
);
303 if (x2apic_nmi
->lint
!= 1)
304 printk(KERN_WARNING PREFIX
"NMI not connected to LINT 1!\n");
310 acpi_parse_lapic_nmi(struct acpi_subtable_header
* header
, const unsigned long end
)
312 struct acpi_madt_local_apic_nmi
*lapic_nmi
= NULL
;
314 lapic_nmi
= (struct acpi_madt_local_apic_nmi
*)header
;
316 if (BAD_MADT_ENTRY(lapic_nmi
, end
))
319 acpi_table_print_madt_entry(header
);
321 if (lapic_nmi
->lint
!= 1)
322 printk(KERN_WARNING PREFIX
"NMI not connected to LINT 1!\n");
327 #endif /*CONFIG_X86_LOCAL_APIC */
329 #ifdef CONFIG_X86_IO_APIC
332 static void __init
mp_override_legacy_irq(u8 bus_irq
, u8 polarity
, u8 trigger
,
337 struct mpc_intsrc mp_irq
;
340 * Convert 'gsi' to 'ioapic.pin'.
342 ioapic
= mp_find_ioapic(gsi
);
345 pin
= mp_find_ioapic_pin(ioapic
, gsi
);
348 * TBD: This check is for faulty timer entries, where the override
349 * erroneously sets the trigger to level, resulting in a HUGE
350 * increase of timer interrupts!
352 if ((bus_irq
== 0) && (trigger
== 3))
355 mp_irq
.type
= MP_INTSRC
;
356 mp_irq
.irqtype
= mp_INT
;
357 mp_irq
.irqflag
= (trigger
<< 2) | polarity
;
358 mp_irq
.srcbus
= MP_ISA_BUS
;
359 mp_irq
.srcbusirq
= bus_irq
; /* IRQ */
360 mp_irq
.dstapic
= mpc_ioapic_id(ioapic
); /* APIC ID */
361 mp_irq
.dstirq
= pin
; /* INTIN# */
363 mp_save_irq(&mp_irq
);
366 * Reset default identity mapping if gsi is also an legacy IRQ,
367 * otherwise there will be more than one entry with the same GSI
368 * and acpi_isa_irq_to_gsi() may give wrong result.
370 if (gsi
< nr_legacy_irqs() && isa_irq_to_gsi
[gsi
] == gsi
)
371 isa_irq_to_gsi
[gsi
] = ACPI_INVALID_GSI
;
372 isa_irq_to_gsi
[bus_irq
] = gsi
;
375 static int mp_config_acpi_gsi(struct device
*dev
, u32 gsi
, int trigger
,
378 #ifdef CONFIG_X86_MPPARSE
379 struct mpc_intsrc mp_irq
;
380 struct pci_dev
*pdev
;
381 unsigned char number
;
388 if (!dev
|| !dev_is_pci(dev
))
391 pdev
= to_pci_dev(dev
);
392 number
= pdev
->bus
->number
;
395 /* print the entry should happen on mptable identically */
396 mp_irq
.type
= MP_INTSRC
;
397 mp_irq
.irqtype
= mp_INT
;
398 mp_irq
.irqflag
= (trigger
== ACPI_EDGE_SENSITIVE
? 4 : 0x0c) |
399 (polarity
== ACPI_ACTIVE_HIGH
? 1 : 3);
400 mp_irq
.srcbus
= number
;
401 mp_irq
.srcbusirq
= (((devfn
>> 3) & 0x1f) << 2) | ((pin
- 1) & 3);
402 ioapic
= mp_find_ioapic(gsi
);
403 mp_irq
.dstapic
= mpc_ioapic_id(ioapic
);
404 mp_irq
.dstirq
= mp_find_ioapic_pin(ioapic
, gsi
);
406 mp_save_irq(&mp_irq
);
412 acpi_parse_ioapic(struct acpi_subtable_header
* header
, const unsigned long end
)
414 struct acpi_madt_io_apic
*ioapic
= NULL
;
415 struct ioapic_domain_cfg cfg
= {
416 .type
= IOAPIC_DOMAIN_DYNAMIC
,
417 .ops
= &mp_ioapic_irqdomain_ops
,
420 ioapic
= (struct acpi_madt_io_apic
*)header
;
422 if (BAD_MADT_ENTRY(ioapic
, end
))
425 acpi_table_print_madt_entry(header
);
427 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
428 if (ioapic
->global_irq_base
< nr_legacy_irqs())
429 cfg
.type
= IOAPIC_DOMAIN_LEGACY
;
431 mp_register_ioapic(ioapic
->id
, ioapic
->address
, ioapic
->global_irq_base
,
438 * Parse Interrupt Source Override for the ACPI SCI
440 static void __init
acpi_sci_ioapic_setup(u8 bus_irq
, u16 polarity
, u16 trigger
, u32 gsi
)
442 if (trigger
== 0) /* compatible SCI trigger is level */
445 if (polarity
== 0) /* compatible SCI polarity is low */
448 /* Command-line over-ride via acpi_sci= */
449 if (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
)
450 trigger
= (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2;
452 if (acpi_sci_flags
& ACPI_MADT_POLARITY_MASK
)
453 polarity
= acpi_sci_flags
& ACPI_MADT_POLARITY_MASK
;
455 mp_override_legacy_irq(bus_irq
, polarity
, trigger
, gsi
);
458 * stash over-ride to indicate we've been here
459 * and for later update of acpi_gbl_FADT
461 acpi_sci_override_gsi
= gsi
;
466 acpi_parse_int_src_ovr(struct acpi_subtable_header
* header
,
467 const unsigned long end
)
469 struct acpi_madt_interrupt_override
*intsrc
= NULL
;
471 intsrc
= (struct acpi_madt_interrupt_override
*)header
;
473 if (BAD_MADT_ENTRY(intsrc
, end
))
476 acpi_table_print_madt_entry(header
);
478 if (intsrc
->source_irq
== acpi_gbl_FADT
.sci_interrupt
) {
479 acpi_sci_ioapic_setup(intsrc
->source_irq
,
480 intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
,
481 (intsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2,
486 if (intsrc
->source_irq
== 0) {
487 if (acpi_skip_timer_override
) {
488 printk(PREFIX
"BIOS IRQ0 override ignored.\n");
492 if ((intsrc
->global_irq
== 2) && acpi_fix_pin2_polarity
493 && (intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
)) {
494 intsrc
->inti_flags
&= ~ACPI_MADT_POLARITY_MASK
;
495 printk(PREFIX
"BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
499 mp_override_legacy_irq(intsrc
->source_irq
,
500 intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
,
501 (intsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2,
508 acpi_parse_nmi_src(struct acpi_subtable_header
* header
, const unsigned long end
)
510 struct acpi_madt_nmi_source
*nmi_src
= NULL
;
512 nmi_src
= (struct acpi_madt_nmi_source
*)header
;
514 if (BAD_MADT_ENTRY(nmi_src
, end
))
517 acpi_table_print_madt_entry(header
);
519 /* TBD: Support nimsrc entries? */
524 #endif /* CONFIG_X86_IO_APIC */
527 * acpi_pic_sci_set_trigger()
529 * use ELCR to set PIC-mode trigger type for SCI
531 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
532 * it may require Edge Trigger -- use "acpi_sci=edge"
534 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
535 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
536 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
537 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
540 void __init
acpi_pic_sci_set_trigger(unsigned int irq
, u16 trigger
)
542 unsigned int mask
= 1 << irq
;
543 unsigned int old
, new;
545 /* Real old ELCR mask */
546 old
= inb(0x4d0) | (inb(0x4d1) << 8);
549 * If we use ACPI to set PCI IRQs, then we should clear ELCR
550 * since we will set it correctly as we enable the PCI irq
553 new = acpi_noirq
? old
: 0;
556 * Update SCI information in the ELCR, it isn't in the PCI
560 case 1: /* Edge - clear */
563 case 3: /* Level - set */
571 printk(PREFIX
"setting ELCR to %04x (from %04x)\n", new, old
);
573 outb(new >> 8, 0x4d1);
576 int acpi_gsi_to_irq(u32 gsi
, unsigned int *irqp
)
578 int rc
, irq
, trigger
, polarity
;
580 if (acpi_irq_model
== ACPI_IRQ_MODEL_PIC
) {
585 rc
= acpi_get_override_irq(gsi
, &trigger
, &polarity
);
587 trigger
= trigger
? ACPI_LEVEL_SENSITIVE
: ACPI_EDGE_SENSITIVE
;
588 polarity
= polarity
? ACPI_ACTIVE_LOW
: ACPI_ACTIVE_HIGH
;
589 irq
= acpi_register_gsi(NULL
, gsi
, trigger
, polarity
);
598 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq
);
600 int acpi_isa_irq_to_gsi(unsigned isa_irq
, u32
*gsi
)
602 if (isa_irq
< nr_legacy_irqs() &&
603 isa_irq_to_gsi
[isa_irq
] != ACPI_INVALID_GSI
) {
604 *gsi
= isa_irq_to_gsi
[isa_irq
];
611 static int acpi_register_gsi_pic(struct device
*dev
, u32 gsi
,
612 int trigger
, int polarity
)
616 * Make sure all (legacy) PCI IRQs are set as level-triggered.
618 if (trigger
== ACPI_LEVEL_SENSITIVE
)
619 elcr_set_level_irq(gsi
);
625 #ifdef CONFIG_X86_LOCAL_APIC
626 static int acpi_register_gsi_ioapic(struct device
*dev
, u32 gsi
,
627 int trigger
, int polarity
)
630 #ifdef CONFIG_X86_IO_APIC
632 struct irq_alloc_info info
;
634 node
= dev
? dev_to_node(dev
) : NUMA_NO_NODE
;
635 trigger
= trigger
== ACPI_EDGE_SENSITIVE
? 0 : 1;
636 polarity
= polarity
== ACPI_ACTIVE_HIGH
? 0 : 1;
637 ioapic_set_alloc_attr(&info
, node
, trigger
, polarity
);
639 mutex_lock(&acpi_ioapic_lock
);
640 irq
= mp_map_gsi_to_irq(gsi
, IOAPIC_MAP_ALLOC
, &info
);
641 /* Don't set up the ACPI SCI because it's already set up */
642 if (irq
>= 0 && enable_update_mptable
&&
643 acpi_gbl_FADT
.sci_interrupt
!= gsi
)
644 mp_config_acpi_gsi(dev
, gsi
, trigger
, polarity
);
645 mutex_unlock(&acpi_ioapic_lock
);
651 static void acpi_unregister_gsi_ioapic(u32 gsi
)
653 #ifdef CONFIG_X86_IO_APIC
656 mutex_lock(&acpi_ioapic_lock
);
657 irq
= mp_map_gsi_to_irq(gsi
, 0, NULL
);
660 mutex_unlock(&acpi_ioapic_lock
);
665 int (*__acpi_register_gsi
)(struct device
*dev
, u32 gsi
,
666 int trigger
, int polarity
) = acpi_register_gsi_pic
;
667 void (*__acpi_unregister_gsi
)(u32 gsi
) = NULL
;
669 #ifdef CONFIG_ACPI_SLEEP
670 int (*acpi_suspend_lowlevel
)(void) = x86_acpi_suspend_lowlevel
;
672 int (*acpi_suspend_lowlevel
)(void);
676 * success: return IRQ number (>=0)
677 * failure: return < 0
679 int acpi_register_gsi(struct device
*dev
, u32 gsi
, int trigger
, int polarity
)
681 return __acpi_register_gsi(dev
, gsi
, trigger
, polarity
);
683 EXPORT_SYMBOL_GPL(acpi_register_gsi
);
685 void acpi_unregister_gsi(u32 gsi
)
687 if (__acpi_unregister_gsi
)
688 __acpi_unregister_gsi(gsi
);
690 EXPORT_SYMBOL_GPL(acpi_unregister_gsi
);
692 #ifdef CONFIG_X86_LOCAL_APIC
693 static void __init
acpi_set_irq_model_ioapic(void)
695 acpi_irq_model
= ACPI_IRQ_MODEL_IOAPIC
;
696 __acpi_register_gsi
= acpi_register_gsi_ioapic
;
697 __acpi_unregister_gsi
= acpi_unregister_gsi_ioapic
;
703 * ACPI based hotplug support for CPU
705 #ifdef CONFIG_ACPI_HOTPLUG_CPU
706 #include <acpi/processor.h>
708 static void acpi_map_cpu2node(acpi_handle handle
, int cpu
, int physid
)
710 #ifdef CONFIG_ACPI_NUMA
713 nid
= acpi_get_node(handle
);
715 set_apicid_to_node(physid
, nid
);
716 numa_set_node(cpu
, nid
);
721 int acpi_map_cpu(acpi_handle handle
, phys_cpuid_t physid
, int *pcpu
)
725 cpu
= acpi_register_lapic(physid
, U32_MAX
, ACPI_MADT_ENABLED
);
727 pr_info(PREFIX
"Unable to map lapic to logical cpu number\n");
731 acpi_processor_set_pdc(handle
);
732 acpi_map_cpu2node(handle
, cpu
, physid
);
737 EXPORT_SYMBOL(acpi_map_cpu
);
739 int acpi_unmap_cpu(int cpu
)
741 #ifdef CONFIG_ACPI_NUMA
742 set_apicid_to_node(per_cpu(x86_cpu_to_apicid
, cpu
), NUMA_NO_NODE
);
745 per_cpu(x86_cpu_to_apicid
, cpu
) = -1;
746 set_cpu_present(cpu
, false);
751 EXPORT_SYMBOL(acpi_unmap_cpu
);
752 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
754 int acpi_register_ioapic(acpi_handle handle
, u64 phys_addr
, u32 gsi_base
)
757 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
760 struct ioapic_domain_cfg cfg
= {
761 .type
= IOAPIC_DOMAIN_DYNAMIC
,
762 .ops
= &mp_ioapic_irqdomain_ops
,
765 ioapic_id
= acpi_get_ioapic_id(handle
, gsi_base
, &addr
);
767 unsigned long long uid
;
770 status
= acpi_evaluate_integer(handle
, METHOD_NAME__UID
,
772 if (ACPI_FAILURE(status
)) {
773 acpi_handle_warn(handle
, "failed to get IOAPIC ID.\n");
776 ioapic_id
= (int)uid
;
779 mutex_lock(&acpi_ioapic_lock
);
780 ret
= mp_register_ioapic(ioapic_id
, phys_addr
, gsi_base
, &cfg
);
781 mutex_unlock(&acpi_ioapic_lock
);
786 EXPORT_SYMBOL(acpi_register_ioapic
);
788 int acpi_unregister_ioapic(acpi_handle handle
, u32 gsi_base
)
792 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
793 mutex_lock(&acpi_ioapic_lock
);
794 ret
= mp_unregister_ioapic(gsi_base
);
795 mutex_unlock(&acpi_ioapic_lock
);
800 EXPORT_SYMBOL(acpi_unregister_ioapic
);
803 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
804 * has been registered
805 * @handle: ACPI handle of the IOAPIC deivce
806 * @gsi_base: GSI base associated with the IOAPIC
808 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
809 * with acpi_register_ioapic()/acpi_unregister_ioapic().
811 int acpi_ioapic_registered(acpi_handle handle
, u32 gsi_base
)
815 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
816 mutex_lock(&acpi_ioapic_lock
);
817 ret
= mp_ioapic_registered(gsi_base
);
818 mutex_unlock(&acpi_ioapic_lock
);
824 static int __init
acpi_parse_sbf(struct acpi_table_header
*table
)
826 struct acpi_table_boot
*sb
= (struct acpi_table_boot
*)table
;
828 sbf_port
= sb
->cmos_index
; /* Save CMOS port */
833 #ifdef CONFIG_HPET_TIMER
834 #include <asm/hpet.h>
836 static struct resource
*hpet_res __initdata
;
838 static int __init
acpi_parse_hpet(struct acpi_table_header
*table
)
840 struct acpi_table_hpet
*hpet_tbl
= (struct acpi_table_hpet
*)table
;
842 if (hpet_tbl
->address
.space_id
!= ACPI_SPACE_MEM
) {
843 printk(KERN_WARNING PREFIX
"HPET timers must be located in "
848 hpet_address
= hpet_tbl
->address
.address
;
849 hpet_blockid
= hpet_tbl
->sequence
;
852 * Some broken BIOSes advertise HPET at 0x0. We really do not
853 * want to allocate a resource there.
856 printk(KERN_WARNING PREFIX
857 "HPET id: %#x base: %#lx is invalid\n",
858 hpet_tbl
->id
, hpet_address
);
863 * Some even more broken BIOSes advertise HPET at
864 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
867 if (hpet_address
== 0xfed0000000000000UL
) {
868 if (!hpet_force_user
) {
869 printk(KERN_WARNING PREFIX
"HPET id: %#x "
870 "base: 0xfed0000000000000 is bogus\n "
871 "try hpet=force on the kernel command line to "
872 "fix it up to 0xfed00000.\n", hpet_tbl
->id
);
876 printk(KERN_WARNING PREFIX
877 "HPET id: %#x base: 0xfed0000000000000 fixed up "
878 "to 0xfed00000.\n", hpet_tbl
->id
);
882 printk(KERN_INFO PREFIX
"HPET id: %#x base: %#lx\n",
883 hpet_tbl
->id
, hpet_address
);
886 * Allocate and initialize the HPET firmware resource for adding into
887 * the resource tree during the lateinit timeframe.
889 #define HPET_RESOURCE_NAME_SIZE 9
890 hpet_res
= alloc_bootmem(sizeof(*hpet_res
) + HPET_RESOURCE_NAME_SIZE
);
892 hpet_res
->name
= (void *)&hpet_res
[1];
893 hpet_res
->flags
= IORESOURCE_MEM
;
894 snprintf((char *)hpet_res
->name
, HPET_RESOURCE_NAME_SIZE
, "HPET %u",
897 hpet_res
->start
= hpet_address
;
898 hpet_res
->end
= hpet_address
+ (1 * 1024) - 1;
904 * hpet_insert_resource inserts the HPET resources used into the resource
907 static __init
int hpet_insert_resource(void)
912 return insert_resource(&iomem_resource
, hpet_res
);
915 late_initcall(hpet_insert_resource
);
918 #define acpi_parse_hpet NULL
921 static int __init
acpi_parse_fadt(struct acpi_table_header
*table
)
923 if (!(acpi_gbl_FADT
.boot_flags
& ACPI_FADT_LEGACY_DEVICES
)) {
924 pr_debug("ACPI: no legacy devices present\n");
925 x86_platform
.legacy
.devices
.pnpbios
= 0;
928 if (acpi_gbl_FADT
.boot_flags
& ACPI_FADT_NO_CMOS_RTC
) {
929 pr_debug("ACPI: not registering RTC platform device\n");
930 x86_platform
.legacy
.rtc
= 0;
933 #ifdef CONFIG_X86_PM_TIMER
934 /* detect the location of the ACPI PM Timer */
935 if (acpi_gbl_FADT
.header
.revision
>= FADT2_REVISION_ID
) {
937 if (acpi_gbl_FADT
.xpm_timer_block
.space_id
!=
938 ACPI_ADR_SPACE_SYSTEM_IO
)
941 pmtmr_ioport
= acpi_gbl_FADT
.xpm_timer_block
.address
;
943 * "X" fields are optional extensions to the original V1.0
944 * fields, so we must selectively expand V1.0 fields if the
945 * corresponding X field is zero.
948 pmtmr_ioport
= acpi_gbl_FADT
.pm_timer_block
;
951 pmtmr_ioport
= acpi_gbl_FADT
.pm_timer_block
;
954 printk(KERN_INFO PREFIX
"PM-Timer IO Port: %#x\n",
960 #ifdef CONFIG_X86_LOCAL_APIC
962 * Parse LAPIC entries in MADT
963 * returns 0 on success, < 0 on error
966 static int __init
early_acpi_parse_madt_lapic_addr_ovr(void)
970 if (!boot_cpu_has(X86_FEATURE_APIC
))
974 * Note that the LAPIC address is obtained from the MADT (32-bit value)
975 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
978 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE
,
979 acpi_parse_lapic_addr_ovr
, 0);
981 printk(KERN_ERR PREFIX
982 "Error parsing LAPIC address override entry\n");
986 register_lapic_address(acpi_lapic_addr
);
991 static int __init
acpi_parse_madt_lapic_entries(void)
996 struct acpi_subtable_proc madt_proc
[2];
998 if (!boot_cpu_has(X86_FEATURE_APIC
))
1002 * Note that the LAPIC address is obtained from the MADT (32-bit value)
1003 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
1006 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE
,
1007 acpi_parse_lapic_addr_ovr
, 0);
1009 printk(KERN_ERR PREFIX
1010 "Error parsing LAPIC address override entry\n");
1014 register_lapic_address(acpi_lapic_addr
);
1016 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC
,
1017 acpi_parse_sapic
, MAX_LOCAL_APIC
);
1020 memset(madt_proc
, 0, sizeof(madt_proc
));
1021 madt_proc
[0].id
= ACPI_MADT_TYPE_LOCAL_APIC
;
1022 madt_proc
[0].handler
= acpi_parse_lapic
;
1023 madt_proc
[1].id
= ACPI_MADT_TYPE_LOCAL_X2APIC
;
1024 madt_proc
[1].handler
= acpi_parse_x2apic
;
1025 ret
= acpi_table_parse_entries_array(ACPI_SIG_MADT
,
1026 sizeof(struct acpi_table_madt
),
1027 madt_proc
, ARRAY_SIZE(madt_proc
), MAX_LOCAL_APIC
);
1029 printk(KERN_ERR PREFIX
1030 "Error parsing LAPIC/X2APIC entries\n");
1034 x2count
= madt_proc
[0].count
;
1035 count
= madt_proc
[1].count
;
1037 if (!count
&& !x2count
) {
1038 printk(KERN_ERR PREFIX
"No LAPIC entries present\n");
1039 /* TBD: Cleanup to allow fallback to MPS */
1041 } else if (count
< 0 || x2count
< 0) {
1042 printk(KERN_ERR PREFIX
"Error parsing LAPIC entry\n");
1043 /* TBD: Cleanup to allow fallback to MPS */
1047 x2count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI
,
1048 acpi_parse_x2apic_nmi
, 0);
1049 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI
,
1050 acpi_parse_lapic_nmi
, 0);
1051 if (count
< 0 || x2count
< 0) {
1052 printk(KERN_ERR PREFIX
"Error parsing LAPIC NMI entry\n");
1053 /* TBD: Cleanup to allow fallback to MPS */
1058 #endif /* CONFIG_X86_LOCAL_APIC */
1060 #ifdef CONFIG_X86_IO_APIC
1061 static void __init
mp_config_acpi_legacy_irqs(void)
1064 struct mpc_intsrc mp_irq
;
1068 * Fabricate the legacy ISA bus (bus #31).
1070 mp_bus_id_to_type
[MP_ISA_BUS
] = MP_BUS_ISA
;
1072 set_bit(MP_ISA_BUS
, mp_bus_not_pci
);
1073 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS
);
1076 * Use the default configuration for the IRQs 0-15. Unless
1077 * overridden by (MADT) interrupt source override entries.
1079 for (i
= 0; i
< nr_legacy_irqs(); i
++) {
1081 unsigned int dstapic
;
1085 /* Locate the gsi that irq i maps to. */
1086 if (acpi_isa_irq_to_gsi(i
, &gsi
))
1090 * Locate the IOAPIC that manages the ISA IRQ.
1092 ioapic
= mp_find_ioapic(gsi
);
1095 pin
= mp_find_ioapic_pin(ioapic
, gsi
);
1096 dstapic
= mpc_ioapic_id(ioapic
);
1098 for (idx
= 0; idx
< mp_irq_entries
; idx
++) {
1099 struct mpc_intsrc
*irq
= mp_irqs
+ idx
;
1101 /* Do we already have a mapping for this ISA IRQ? */
1102 if (irq
->srcbus
== MP_ISA_BUS
&& irq
->srcbusirq
== i
)
1105 /* Do we already have a mapping for this IOAPIC pin */
1106 if (irq
->dstapic
== dstapic
&& irq
->dstirq
== pin
)
1110 if (idx
!= mp_irq_entries
) {
1111 printk(KERN_DEBUG
"ACPI: IRQ%d used by override.\n", i
);
1112 continue; /* IRQ already used */
1115 mp_irq
.type
= MP_INTSRC
;
1116 mp_irq
.irqflag
= 0; /* Conforming */
1117 mp_irq
.srcbus
= MP_ISA_BUS
;
1118 mp_irq
.dstapic
= dstapic
;
1119 mp_irq
.irqtype
= mp_INT
;
1120 mp_irq
.srcbusirq
= i
; /* Identity mapped */
1121 mp_irq
.dstirq
= pin
;
1123 mp_save_irq(&mp_irq
);
1128 * Parse IOAPIC related entries in MADT
1129 * returns 0 on success, < 0 on error
1131 static int __init
acpi_parse_madt_ioapic_entries(void)
1136 * ACPI interpreter is required to complete interrupt setup,
1137 * so if it is off, don't enumerate the io-apics with ACPI.
1138 * If MPS is present, it will handle them,
1139 * otherwise the system will stay in PIC mode
1141 if (acpi_disabled
|| acpi_noirq
)
1144 if (!boot_cpu_has(X86_FEATURE_APIC
))
1148 * if "noapic" boot option, don't look for IO-APICs
1150 if (skip_ioapic_setup
) {
1151 printk(KERN_INFO PREFIX
"Skipping IOAPIC probe "
1152 "due to 'noapic' option.\n");
1156 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC
, acpi_parse_ioapic
,
1159 printk(KERN_ERR PREFIX
"No IOAPIC entries present\n");
1161 } else if (count
< 0) {
1162 printk(KERN_ERR PREFIX
"Error parsing IOAPIC entry\n");
1166 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE
,
1167 acpi_parse_int_src_ovr
, nr_irqs
);
1169 printk(KERN_ERR PREFIX
1170 "Error parsing interrupt source overrides entry\n");
1171 /* TBD: Cleanup to allow fallback to MPS */
1176 * If BIOS did not supply an INT_SRC_OVR for the SCI
1177 * pretend we got one so we can set the SCI flags.
1179 if (!acpi_sci_override_gsi
)
1180 acpi_sci_ioapic_setup(acpi_gbl_FADT
.sci_interrupt
, 0, 0,
1181 acpi_gbl_FADT
.sci_interrupt
);
1183 /* Fill in identity legacy mappings where no override */
1184 mp_config_acpi_legacy_irqs();
1186 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE
,
1187 acpi_parse_nmi_src
, nr_irqs
);
1189 printk(KERN_ERR PREFIX
"Error parsing NMI SRC entry\n");
1190 /* TBD: Cleanup to allow fallback to MPS */
1197 static inline int acpi_parse_madt_ioapic_entries(void)
1201 #endif /* !CONFIG_X86_IO_APIC */
1203 static void __init
early_acpi_process_madt(void)
1205 #ifdef CONFIG_X86_LOCAL_APIC
1208 if (!acpi_table_parse(ACPI_SIG_MADT
, acpi_parse_madt
)) {
1211 * Parse MADT LAPIC entries
1213 error
= early_acpi_parse_madt_lapic_addr_ovr();
1216 smp_found_config
= 1;
1218 if (error
== -EINVAL
) {
1220 * Dell Precision Workstation 410, 610 come here.
1222 printk(KERN_ERR PREFIX
1223 "Invalid BIOS MADT, disabling ACPI\n");
1230 static void __init
acpi_process_madt(void)
1232 #ifdef CONFIG_X86_LOCAL_APIC
1235 if (!acpi_table_parse(ACPI_SIG_MADT
, acpi_parse_madt
)) {
1238 * Parse MADT LAPIC entries
1240 error
= acpi_parse_madt_lapic_entries();
1245 * Parse MADT IO-APIC entries
1247 mutex_lock(&acpi_ioapic_lock
);
1248 error
= acpi_parse_madt_ioapic_entries();
1249 mutex_unlock(&acpi_ioapic_lock
);
1251 acpi_set_irq_model_ioapic();
1253 smp_found_config
= 1;
1256 if (error
== -EINVAL
) {
1258 * Dell Precision Workstation 410, 610 come here.
1260 printk(KERN_ERR PREFIX
1261 "Invalid BIOS MADT, disabling ACPI\n");
1266 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1267 * In the event an MPS table was found, forget it.
1268 * Boot with "acpi=off" to use MPS on such a system.
1270 if (smp_found_config
) {
1271 printk(KERN_WARNING PREFIX
1272 "No APIC-table, disabling MPS\n");
1273 smp_found_config
= 0;
1278 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1279 * processors, where MPS only supports physical.
1281 if (acpi_lapic
&& acpi_ioapic
)
1282 printk(KERN_INFO
"Using ACPI (MADT) for SMP configuration "
1284 else if (acpi_lapic
)
1285 printk(KERN_INFO
"Using ACPI for processor (LAPIC) "
1286 "configuration information\n");
1291 static int __init
disable_acpi_irq(const struct dmi_system_id
*d
)
1294 printk(KERN_NOTICE
"%s detected: force use of acpi=noirq\n",
1301 static int __init
disable_acpi_pci(const struct dmi_system_id
*d
)
1304 printk(KERN_NOTICE
"%s detected: force use of pci=noacpi\n",
1311 static int __init
dmi_disable_acpi(const struct dmi_system_id
*d
)
1314 printk(KERN_NOTICE
"%s detected: acpi off\n", d
->ident
);
1318 "Warning: DMI blacklist says broken, but acpi forced\n");
1324 * Force ignoring BIOS IRQ0 override
1326 static int __init
dmi_ignore_irq0_timer_override(const struct dmi_system_id
*d
)
1328 if (!acpi_skip_timer_override
) {
1329 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1331 acpi_skip_timer_override
= 1;
1337 * ACPI offers an alternative platform interface model that removes
1338 * ACPI hardware requirements for platforms that do not implement
1339 * the PC Architecture.
1341 * We initialize the Hardware-reduced ACPI model here:
1343 static void __init
acpi_reduced_hw_init(void)
1345 if (acpi_gbl_reduced_hardware
) {
1347 * Override x86_init functions and bypass legacy pic
1348 * in Hardware-reduced ACPI mode
1350 x86_init
.timers
.timer_init
= x86_init_noop
;
1351 x86_init
.irqs
.pre_vector_init
= x86_init_noop
;
1352 legacy_pic
= &null_legacy_pic
;
1357 * If your system is blacklisted here, but you find that acpi=force
1358 * works for you, please contact linux-acpi@vger.kernel.org
1360 static struct dmi_system_id __initdata acpi_dmi_table
[] = {
1362 * Boxes that need ACPI disabled
1365 .callback
= dmi_disable_acpi
,
1366 .ident
= "IBM Thinkpad",
1368 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1369 DMI_MATCH(DMI_BOARD_NAME
, "2629H1G"),
1374 * Boxes that need ACPI PCI IRQ routing disabled
1377 .callback
= disable_acpi_irq
,
1378 .ident
= "ASUS A7V",
1380 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC"),
1381 DMI_MATCH(DMI_BOARD_NAME
, "<A7V>"),
1382 /* newer BIOS, Revision 1011, does work */
1383 DMI_MATCH(DMI_BIOS_VERSION
,
1384 "ASUS A7V ACPI BIOS Revision 1007"),
1389 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1390 * for LPC bridge, which is needed for the PCI
1391 * interrupt links to work. DSDT fix is in bug 5966.
1392 * 2645, 2646 model numbers are shared with 600/600E/600X
1394 .callback
= disable_acpi_irq
,
1395 .ident
= "IBM Thinkpad 600 Series 2645",
1397 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1398 DMI_MATCH(DMI_BOARD_NAME
, "2645"),
1402 .callback
= disable_acpi_irq
,
1403 .ident
= "IBM Thinkpad 600 Series 2646",
1405 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1406 DMI_MATCH(DMI_BOARD_NAME
, "2646"),
1410 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1413 .callback
= disable_acpi_pci
,
1414 .ident
= "ASUS PR-DLS",
1416 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1417 DMI_MATCH(DMI_BOARD_NAME
, "PR-DLS"),
1418 DMI_MATCH(DMI_BIOS_VERSION
,
1419 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1420 DMI_MATCH(DMI_BIOS_DATE
, "03/21/2003")
1424 .callback
= disable_acpi_pci
,
1425 .ident
= "Acer TravelMate 36x Laptop",
1427 DMI_MATCH(DMI_SYS_VENDOR
, "Acer"),
1428 DMI_MATCH(DMI_PRODUCT_NAME
, "TravelMate 360"),
1434 /* second table for DMI checks that should run after early-quirks */
1435 static struct dmi_system_id __initdata acpi_dmi_table_late
[] = {
1437 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1438 * which includes some code which overrides all temperature
1439 * trip points to 16C if the INTIN2 input of the I/O APIC
1440 * is enabled. This input is incorrectly designated the
1441 * ISA IRQ 0 via an interrupt source override even though
1442 * it is wired to the output of the master 8259A and INTIN0
1443 * is not connected at all. Force ignoring BIOS IRQ0
1444 * override in that cases.
1447 .callback
= dmi_ignore_irq0_timer_override
,
1448 .ident
= "HP nx6115 laptop",
1450 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1451 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq nx6115"),
1455 .callback
= dmi_ignore_irq0_timer_override
,
1456 .ident
= "HP NX6125 laptop",
1458 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1459 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq nx6125"),
1463 .callback
= dmi_ignore_irq0_timer_override
,
1464 .ident
= "HP NX6325 laptop",
1466 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1467 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq nx6325"),
1471 .callback
= dmi_ignore_irq0_timer_override
,
1472 .ident
= "HP 6715b laptop",
1474 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1475 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq 6715b"),
1479 .callback
= dmi_ignore_irq0_timer_override
,
1480 .ident
= "FUJITSU SIEMENS",
1482 DMI_MATCH(DMI_SYS_VENDOR
, "FUJITSU SIEMENS"),
1483 DMI_MATCH(DMI_PRODUCT_NAME
, "AMILO PRO V2030"),
1490 * acpi_boot_table_init() and acpi_boot_init()
1491 * called from setup_arch(), always.
1492 * 1. checksums all tables
1493 * 2. enumerates lapics
1494 * 3. enumerates io-apics
1496 * acpi_table_init() is separate to allow reading SRAT without
1497 * other side effects.
1499 * side effects of acpi_boot_init:
1500 * acpi_lapic = 1 if LAPIC found
1501 * acpi_ioapic = 1 if IOAPIC found
1502 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1503 * if acpi_blacklisted() acpi_disabled = 1;
1504 * acpi_irq_model=...
1508 void __init
acpi_boot_table_init(void)
1510 dmi_check_system(acpi_dmi_table
);
1513 * If acpi_disabled, bail out
1519 * Initialize the ACPI boot-time table parser.
1521 if (acpi_table_init()) {
1526 acpi_table_parse(ACPI_SIG_BOOT
, acpi_parse_sbf
);
1529 * blacklist may disable ACPI entirely
1531 if (acpi_blacklisted()) {
1533 printk(KERN_WARNING PREFIX
"acpi=force override\n");
1535 printk(KERN_WARNING PREFIX
"Disabling ACPI support\n");
1542 int __init
early_acpi_boot_init(void)
1545 * If acpi_disabled, bail out
1551 * Process the Multiple APIC Description Table (MADT), if present
1553 early_acpi_process_madt();
1556 * Hardware-reduced ACPI mode initialization:
1558 acpi_reduced_hw_init();
1563 int __init
acpi_boot_init(void)
1565 /* those are executed after early-quirks are executed */
1566 dmi_check_system(acpi_dmi_table_late
);
1569 * If acpi_disabled, bail out
1574 acpi_table_parse(ACPI_SIG_BOOT
, acpi_parse_sbf
);
1577 * set sci_int and PM timer address
1579 acpi_table_parse(ACPI_SIG_FADT
, acpi_parse_fadt
);
1582 * Process the Multiple APIC Description Table (MADT), if present
1584 acpi_process_madt();
1586 acpi_table_parse(ACPI_SIG_HPET
, acpi_parse_hpet
);
1589 x86_init
.pci
.init
= pci_acpi_init
;
1594 static int __init
parse_acpi(char *arg
)
1599 /* "acpi=off" disables both ACPI table parsing and interpreter */
1600 if (strcmp(arg
, "off") == 0) {
1603 /* acpi=force to over-ride black-list */
1604 else if (strcmp(arg
, "force") == 0) {
1608 /* acpi=strict disables out-of-spec workarounds */
1609 else if (strcmp(arg
, "strict") == 0) {
1612 /* acpi=rsdt use RSDT instead of XSDT */
1613 else if (strcmp(arg
, "rsdt") == 0) {
1614 acpi_gbl_do_not_use_xsdt
= TRUE
;
1616 /* "acpi=noirq" disables ACPI interrupt routing */
1617 else if (strcmp(arg
, "noirq") == 0) {
1620 /* "acpi=copy_dsdt" copys DSDT */
1621 else if (strcmp(arg
, "copy_dsdt") == 0) {
1622 acpi_gbl_copy_dsdt_locally
= 1;
1624 /* "acpi=nocmcff" disables FF mode for corrected errors */
1625 else if (strcmp(arg
, "nocmcff") == 0) {
1626 acpi_disable_cmcff
= 1;
1628 /* Core will printk when we return error. */
1633 early_param("acpi", parse_acpi
);
1635 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1636 static int __init
parse_pci(char *arg
)
1638 if (arg
&& strcmp(arg
, "noacpi") == 0)
1642 early_param("pci", parse_pci
);
1644 int __init
acpi_mps_check(void)
1646 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1647 /* mptable code is not built-in*/
1648 if (acpi_disabled
|| acpi_noirq
) {
1649 printk(KERN_WARNING
"MPS support code is not built-in.\n"
1650 "Using acpi=off or acpi=noirq or pci=noacpi "
1651 "may have problem\n");
1658 #ifdef CONFIG_X86_IO_APIC
1659 static int __init
parse_acpi_skip_timer_override(char *arg
)
1661 acpi_skip_timer_override
= 1;
1664 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override
);
1666 static int __init
parse_acpi_use_timer_override(char *arg
)
1668 acpi_use_timer_override
= 1;
1671 early_param("acpi_use_timer_override", parse_acpi_use_timer_override
);
1672 #endif /* CONFIG_X86_IO_APIC */
1674 static int __init
setup_acpi_sci(char *s
)
1678 if (!strcmp(s
, "edge"))
1679 acpi_sci_flags
= ACPI_MADT_TRIGGER_EDGE
|
1680 (acpi_sci_flags
& ~ACPI_MADT_TRIGGER_MASK
);
1681 else if (!strcmp(s
, "level"))
1682 acpi_sci_flags
= ACPI_MADT_TRIGGER_LEVEL
|
1683 (acpi_sci_flags
& ~ACPI_MADT_TRIGGER_MASK
);
1684 else if (!strcmp(s
, "high"))
1685 acpi_sci_flags
= ACPI_MADT_POLARITY_ACTIVE_HIGH
|
1686 (acpi_sci_flags
& ~ACPI_MADT_POLARITY_MASK
);
1687 else if (!strcmp(s
, "low"))
1688 acpi_sci_flags
= ACPI_MADT_POLARITY_ACTIVE_LOW
|
1689 (acpi_sci_flags
& ~ACPI_MADT_POLARITY_MASK
);
1694 early_param("acpi_sci", setup_acpi_sci
);
1696 int __acpi_acquire_global_lock(unsigned int *lock
)
1698 unsigned int old
, new, val
;
1701 new = (((old
& ~0x3) + 2) + ((old
>> 1) & 0x1));
1702 val
= cmpxchg(lock
, old
, new);
1703 } while (unlikely (val
!= old
));
1704 return (new < 3) ? -1 : 0;
1707 int __acpi_release_global_lock(unsigned int *lock
)
1709 unsigned int old
, new, val
;
1713 val
= cmpxchg(lock
, old
, new);
1714 } while (unlikely (val
!= old
));
1718 void __init
arch_reserve_mem_area(acpi_physical_address addr
, size_t size
)
1720 e820_add_region(addr
, size
, E820_ACPI
);