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>
38 #include <linux/efi-bgrt.h>
40 #include <asm/e820/api.h>
41 #include <asm/irqdomain.h>
42 #include <asm/pci_x86.h>
43 #include <asm/pgtable.h>
44 #include <asm/io_apic.h>
47 #include <asm/mpspec.h>
49 #include <asm/i8259.h>
51 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
52 static int __initdata acpi_force
= 0;
54 EXPORT_SYMBOL(acpi_disabled
);
57 # include <asm/proto.h>
60 #define PREFIX "ACPI: "
62 int acpi_noirq
; /* skip ACPI IRQ initialization */
63 int acpi_pci_disabled
; /* skip ACPI PCI scan and IRQ initialization */
64 EXPORT_SYMBOL(acpi_pci_disabled
);
69 int acpi_disable_cmcff
;
71 u8 acpi_sci_flags __initdata
;
72 int acpi_sci_override_gsi __initdata
;
73 int acpi_skip_timer_override __initdata
;
74 int acpi_use_timer_override __initdata
;
75 int acpi_fix_pin2_polarity __initdata
;
77 #ifdef CONFIG_X86_LOCAL_APIC
78 static u64 acpi_lapic_addr __initdata
= APIC_DEFAULT_PHYS_BASE
;
81 #ifdef CONFIG_X86_IO_APIC
83 * Locks related to IOAPIC hotplug
85 * ->device_hotplug_lock
88 * Interrupt mapping side:
93 static DEFINE_MUTEX(acpi_ioapic_lock
);
96 /* --------------------------------------------------------------------------
97 Boot-time Configuration
98 -------------------------------------------------------------------------- */
101 * The default interrupt routing model is PIC (8259). This gets
102 * overridden if IOAPICs are enumerated (below).
104 enum acpi_irq_model_id acpi_irq_model
= ACPI_IRQ_MODEL_PIC
;
108 * ISA irqs by default are the first 16 gsis but can be
109 * any gsi as specified by an interrupt source override.
111 static u32 isa_irq_to_gsi
[NR_IRQS_LEGACY
] __read_mostly
= {
112 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
115 #define ACPI_INVALID_GSI INT_MIN
118 * This is just a simple wrapper around early_ioremap(),
119 * with sanity checks for phys == 0 and size == 0.
121 char *__init
__acpi_map_table(unsigned long phys
, unsigned long size
)
127 return early_ioremap(phys
, size
);
130 void __init
__acpi_unmap_table(char *map
, unsigned long size
)
135 early_iounmap(map
, size
);
138 #ifdef CONFIG_X86_LOCAL_APIC
139 static int __init
acpi_parse_madt(struct acpi_table_header
*table
)
141 struct acpi_table_madt
*madt
= NULL
;
143 if (!boot_cpu_has(X86_FEATURE_APIC
))
146 madt
= (struct acpi_table_madt
*)table
;
148 printk(KERN_WARNING PREFIX
"Unable to map MADT\n");
153 acpi_lapic_addr
= (u64
) madt
->address
;
155 printk(KERN_DEBUG PREFIX
"Local APIC address 0x%08x\n",
159 default_acpi_madt_oem_check(madt
->header
.oem_id
,
160 madt
->header
.oem_table_id
);
166 * acpi_register_lapic - register a local apic and generates a logic cpu number
167 * @id: local apic id to register
168 * @acpiid: ACPI id to register
169 * @enabled: this cpu is enabled or not
171 * Returns the logic cpu number which maps to the local apic
173 static int acpi_register_lapic(int id
, u32 acpiid
, u8 enabled
)
175 unsigned int ver
= 0;
178 if (id
>= MAX_LOCAL_APIC
) {
179 printk(KERN_INFO PREFIX
"skipped apicid that is too big\n");
188 if (boot_cpu_physical_apicid
!= -1U)
189 ver
= boot_cpu_apic_version
;
191 cpu
= generic_processor_info(id
, ver
);
193 early_per_cpu(x86_cpu_to_acpiid
, cpu
) = acpiid
;
199 acpi_parse_x2apic(struct acpi_subtable_header
*header
, const unsigned long end
)
201 struct acpi_madt_local_x2apic
*processor
= NULL
;
205 processor
= (struct acpi_madt_local_x2apic
*)header
;
207 if (BAD_MADT_ENTRY(processor
, end
))
210 acpi_table_print_madt_entry(header
);
212 apic_id
= processor
->local_apic_id
;
213 enabled
= processor
->lapic_flags
& ACPI_MADT_ENABLED
;
214 #ifdef CONFIG_X86_X2APIC
216 * We need to register disabled CPU as well to permit
217 * counting disabled CPUs. This allows us to size
218 * cpus_possible_map more accurately, to permit
219 * to not preallocating memory for all NR_CPUS
220 * when we use CPU hotplug.
222 if (!apic
->apic_id_valid(apic_id
) && enabled
)
223 printk(KERN_WARNING PREFIX
"x2apic entry ignored\n");
225 acpi_register_lapic(apic_id
, processor
->uid
, enabled
);
227 printk(KERN_WARNING PREFIX
"x2apic entry ignored\n");
234 acpi_parse_lapic(struct acpi_subtable_header
* header
, const unsigned long end
)
236 struct acpi_madt_local_apic
*processor
= NULL
;
238 processor
= (struct acpi_madt_local_apic
*)header
;
240 if (BAD_MADT_ENTRY(processor
, end
))
243 acpi_table_print_madt_entry(header
);
245 /* Ignore invalid ID */
246 if (processor
->id
== 0xff)
250 * We need to register disabled CPU as well to permit
251 * counting disabled CPUs. This allows us to size
252 * cpus_possible_map more accurately, to permit
253 * to not preallocating memory for all NR_CPUS
254 * when we use CPU hotplug.
256 acpi_register_lapic(processor
->id
, /* APIC ID */
257 processor
->processor_id
, /* ACPI ID */
258 processor
->lapic_flags
& ACPI_MADT_ENABLED
);
264 acpi_parse_sapic(struct acpi_subtable_header
*header
, const unsigned long end
)
266 struct acpi_madt_local_sapic
*processor
= NULL
;
268 processor
= (struct acpi_madt_local_sapic
*)header
;
270 if (BAD_MADT_ENTRY(processor
, end
))
273 acpi_table_print_madt_entry(header
);
275 acpi_register_lapic((processor
->id
<< 8) | processor
->eid
,/* APIC ID */
276 processor
->processor_id
, /* ACPI ID */
277 processor
->lapic_flags
& ACPI_MADT_ENABLED
);
283 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header
* header
,
284 const unsigned long end
)
286 struct acpi_madt_local_apic_override
*lapic_addr_ovr
= NULL
;
288 lapic_addr_ovr
= (struct acpi_madt_local_apic_override
*)header
;
290 if (BAD_MADT_ENTRY(lapic_addr_ovr
, end
))
293 acpi_table_print_madt_entry(header
);
295 acpi_lapic_addr
= lapic_addr_ovr
->address
;
301 acpi_parse_x2apic_nmi(struct acpi_subtable_header
*header
,
302 const unsigned long end
)
304 struct acpi_madt_local_x2apic_nmi
*x2apic_nmi
= NULL
;
306 x2apic_nmi
= (struct acpi_madt_local_x2apic_nmi
*)header
;
308 if (BAD_MADT_ENTRY(x2apic_nmi
, end
))
311 acpi_table_print_madt_entry(header
);
313 if (x2apic_nmi
->lint
!= 1)
314 printk(KERN_WARNING PREFIX
"NMI not connected to LINT 1!\n");
320 acpi_parse_lapic_nmi(struct acpi_subtable_header
* header
, const unsigned long end
)
322 struct acpi_madt_local_apic_nmi
*lapic_nmi
= NULL
;
324 lapic_nmi
= (struct acpi_madt_local_apic_nmi
*)header
;
326 if (BAD_MADT_ENTRY(lapic_nmi
, end
))
329 acpi_table_print_madt_entry(header
);
331 if (lapic_nmi
->lint
!= 1)
332 printk(KERN_WARNING PREFIX
"NMI not connected to LINT 1!\n");
337 #endif /*CONFIG_X86_LOCAL_APIC */
339 #ifdef CONFIG_X86_IO_APIC
342 static void __init
mp_override_legacy_irq(u8 bus_irq
, u8 polarity
, u8 trigger
,
347 struct mpc_intsrc mp_irq
;
350 * Check bus_irq boundary.
352 if (bus_irq
>= NR_IRQS_LEGACY
) {
353 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq
);
358 * Convert 'gsi' to 'ioapic.pin'.
360 ioapic
= mp_find_ioapic(gsi
);
363 pin
= mp_find_ioapic_pin(ioapic
, gsi
);
366 * TBD: This check is for faulty timer entries, where the override
367 * erroneously sets the trigger to level, resulting in a HUGE
368 * increase of timer interrupts!
370 if ((bus_irq
== 0) && (trigger
== 3))
373 mp_irq
.type
= MP_INTSRC
;
374 mp_irq
.irqtype
= mp_INT
;
375 mp_irq
.irqflag
= (trigger
<< 2) | polarity
;
376 mp_irq
.srcbus
= MP_ISA_BUS
;
377 mp_irq
.srcbusirq
= bus_irq
; /* IRQ */
378 mp_irq
.dstapic
= mpc_ioapic_id(ioapic
); /* APIC ID */
379 mp_irq
.dstirq
= pin
; /* INTIN# */
381 mp_save_irq(&mp_irq
);
384 * Reset default identity mapping if gsi is also an legacy IRQ,
385 * otherwise there will be more than one entry with the same GSI
386 * and acpi_isa_irq_to_gsi() may give wrong result.
388 if (gsi
< nr_legacy_irqs() && isa_irq_to_gsi
[gsi
] == gsi
)
389 isa_irq_to_gsi
[gsi
] = ACPI_INVALID_GSI
;
390 isa_irq_to_gsi
[bus_irq
] = gsi
;
393 static int mp_config_acpi_gsi(struct device
*dev
, u32 gsi
, int trigger
,
396 #ifdef CONFIG_X86_MPPARSE
397 struct mpc_intsrc mp_irq
;
398 struct pci_dev
*pdev
;
399 unsigned char number
;
406 if (!dev
|| !dev_is_pci(dev
))
409 pdev
= to_pci_dev(dev
);
410 number
= pdev
->bus
->number
;
413 /* print the entry should happen on mptable identically */
414 mp_irq
.type
= MP_INTSRC
;
415 mp_irq
.irqtype
= mp_INT
;
416 mp_irq
.irqflag
= (trigger
== ACPI_EDGE_SENSITIVE
? 4 : 0x0c) |
417 (polarity
== ACPI_ACTIVE_HIGH
? 1 : 3);
418 mp_irq
.srcbus
= number
;
419 mp_irq
.srcbusirq
= (((devfn
>> 3) & 0x1f) << 2) | ((pin
- 1) & 3);
420 ioapic
= mp_find_ioapic(gsi
);
421 mp_irq
.dstapic
= mpc_ioapic_id(ioapic
);
422 mp_irq
.dstirq
= mp_find_ioapic_pin(ioapic
, gsi
);
424 mp_save_irq(&mp_irq
);
430 acpi_parse_ioapic(struct acpi_subtable_header
* header
, const unsigned long end
)
432 struct acpi_madt_io_apic
*ioapic
= NULL
;
433 struct ioapic_domain_cfg cfg
= {
434 .type
= IOAPIC_DOMAIN_DYNAMIC
,
435 .ops
= &mp_ioapic_irqdomain_ops
,
438 ioapic
= (struct acpi_madt_io_apic
*)header
;
440 if (BAD_MADT_ENTRY(ioapic
, end
))
443 acpi_table_print_madt_entry(header
);
445 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
446 if (ioapic
->global_irq_base
< nr_legacy_irqs())
447 cfg
.type
= IOAPIC_DOMAIN_LEGACY
;
449 mp_register_ioapic(ioapic
->id
, ioapic
->address
, ioapic
->global_irq_base
,
456 * Parse Interrupt Source Override for the ACPI SCI
458 static void __init
acpi_sci_ioapic_setup(u8 bus_irq
, u16 polarity
, u16 trigger
, u32 gsi
)
460 if (trigger
== 0) /* compatible SCI trigger is level */
463 if (polarity
== 0) /* compatible SCI polarity is low */
466 /* Command-line over-ride via acpi_sci= */
467 if (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
)
468 trigger
= (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2;
470 if (acpi_sci_flags
& ACPI_MADT_POLARITY_MASK
)
471 polarity
= acpi_sci_flags
& ACPI_MADT_POLARITY_MASK
;
473 mp_override_legacy_irq(bus_irq
, polarity
, trigger
, gsi
);
474 acpi_penalize_sci_irq(bus_irq
, trigger
, polarity
);
477 * stash over-ride to indicate we've been here
478 * and for later update of acpi_gbl_FADT
480 acpi_sci_override_gsi
= gsi
;
485 acpi_parse_int_src_ovr(struct acpi_subtable_header
* header
,
486 const unsigned long end
)
488 struct acpi_madt_interrupt_override
*intsrc
= NULL
;
490 intsrc
= (struct acpi_madt_interrupt_override
*)header
;
492 if (BAD_MADT_ENTRY(intsrc
, end
))
495 acpi_table_print_madt_entry(header
);
497 if (intsrc
->source_irq
== acpi_gbl_FADT
.sci_interrupt
) {
498 acpi_sci_ioapic_setup(intsrc
->source_irq
,
499 intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
,
500 (intsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2,
505 if (intsrc
->source_irq
== 0) {
506 if (acpi_skip_timer_override
) {
507 printk(PREFIX
"BIOS IRQ0 override ignored.\n");
511 if ((intsrc
->global_irq
== 2) && acpi_fix_pin2_polarity
512 && (intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
)) {
513 intsrc
->inti_flags
&= ~ACPI_MADT_POLARITY_MASK
;
514 printk(PREFIX
"BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
518 mp_override_legacy_irq(intsrc
->source_irq
,
519 intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
,
520 (intsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2,
527 acpi_parse_nmi_src(struct acpi_subtable_header
* header
, const unsigned long end
)
529 struct acpi_madt_nmi_source
*nmi_src
= NULL
;
531 nmi_src
= (struct acpi_madt_nmi_source
*)header
;
533 if (BAD_MADT_ENTRY(nmi_src
, end
))
536 acpi_table_print_madt_entry(header
);
538 /* TBD: Support nimsrc entries? */
543 #endif /* CONFIG_X86_IO_APIC */
546 * acpi_pic_sci_set_trigger()
548 * use ELCR to set PIC-mode trigger type for SCI
550 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
551 * it may require Edge Trigger -- use "acpi_sci=edge"
553 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
554 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
555 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
556 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
559 void __init
acpi_pic_sci_set_trigger(unsigned int irq
, u16 trigger
)
561 unsigned int mask
= 1 << irq
;
562 unsigned int old
, new;
564 /* Real old ELCR mask */
565 old
= inb(0x4d0) | (inb(0x4d1) << 8);
568 * If we use ACPI to set PCI IRQs, then we should clear ELCR
569 * since we will set it correctly as we enable the PCI irq
572 new = acpi_noirq
? old
: 0;
575 * Update SCI information in the ELCR, it isn't in the PCI
579 case 1: /* Edge - clear */
582 case 3: /* Level - set */
590 printk(PREFIX
"setting ELCR to %04x (from %04x)\n", new, old
);
592 outb(new >> 8, 0x4d1);
595 int acpi_gsi_to_irq(u32 gsi
, unsigned int *irqp
)
597 int rc
, irq
, trigger
, polarity
;
599 if (acpi_irq_model
== ACPI_IRQ_MODEL_PIC
) {
604 rc
= acpi_get_override_irq(gsi
, &trigger
, &polarity
);
606 trigger
= trigger
? ACPI_LEVEL_SENSITIVE
: ACPI_EDGE_SENSITIVE
;
607 polarity
= polarity
? ACPI_ACTIVE_LOW
: ACPI_ACTIVE_HIGH
;
608 irq
= acpi_register_gsi(NULL
, gsi
, trigger
, polarity
);
617 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq
);
619 int acpi_isa_irq_to_gsi(unsigned isa_irq
, u32
*gsi
)
621 if (isa_irq
< nr_legacy_irqs() &&
622 isa_irq_to_gsi
[isa_irq
] != ACPI_INVALID_GSI
) {
623 *gsi
= isa_irq_to_gsi
[isa_irq
];
630 static int acpi_register_gsi_pic(struct device
*dev
, u32 gsi
,
631 int trigger
, int polarity
)
635 * Make sure all (legacy) PCI IRQs are set as level-triggered.
637 if (trigger
== ACPI_LEVEL_SENSITIVE
)
638 elcr_set_level_irq(gsi
);
644 #ifdef CONFIG_X86_LOCAL_APIC
645 static int acpi_register_gsi_ioapic(struct device
*dev
, u32 gsi
,
646 int trigger
, int polarity
)
649 #ifdef CONFIG_X86_IO_APIC
651 struct irq_alloc_info info
;
653 node
= dev
? dev_to_node(dev
) : NUMA_NO_NODE
;
654 trigger
= trigger
== ACPI_EDGE_SENSITIVE
? 0 : 1;
655 polarity
= polarity
== ACPI_ACTIVE_HIGH
? 0 : 1;
656 ioapic_set_alloc_attr(&info
, node
, trigger
, polarity
);
658 mutex_lock(&acpi_ioapic_lock
);
659 irq
= mp_map_gsi_to_irq(gsi
, IOAPIC_MAP_ALLOC
, &info
);
660 /* Don't set up the ACPI SCI because it's already set up */
661 if (irq
>= 0 && enable_update_mptable
&&
662 acpi_gbl_FADT
.sci_interrupt
!= gsi
)
663 mp_config_acpi_gsi(dev
, gsi
, trigger
, polarity
);
664 mutex_unlock(&acpi_ioapic_lock
);
670 static void acpi_unregister_gsi_ioapic(u32 gsi
)
672 #ifdef CONFIG_X86_IO_APIC
675 mutex_lock(&acpi_ioapic_lock
);
676 irq
= mp_map_gsi_to_irq(gsi
, 0, NULL
);
679 mutex_unlock(&acpi_ioapic_lock
);
684 int (*__acpi_register_gsi
)(struct device
*dev
, u32 gsi
,
685 int trigger
, int polarity
) = acpi_register_gsi_pic
;
686 void (*__acpi_unregister_gsi
)(u32 gsi
) = NULL
;
688 #ifdef CONFIG_ACPI_SLEEP
689 int (*acpi_suspend_lowlevel
)(void) = x86_acpi_suspend_lowlevel
;
691 int (*acpi_suspend_lowlevel
)(void);
695 * success: return IRQ number (>=0)
696 * failure: return < 0
698 int acpi_register_gsi(struct device
*dev
, u32 gsi
, int trigger
, int polarity
)
700 return __acpi_register_gsi(dev
, gsi
, trigger
, polarity
);
702 EXPORT_SYMBOL_GPL(acpi_register_gsi
);
704 void acpi_unregister_gsi(u32 gsi
)
706 if (__acpi_unregister_gsi
)
707 __acpi_unregister_gsi(gsi
);
709 EXPORT_SYMBOL_GPL(acpi_unregister_gsi
);
711 #ifdef CONFIG_X86_LOCAL_APIC
712 static void __init
acpi_set_irq_model_ioapic(void)
714 acpi_irq_model
= ACPI_IRQ_MODEL_IOAPIC
;
715 __acpi_register_gsi
= acpi_register_gsi_ioapic
;
716 __acpi_unregister_gsi
= acpi_unregister_gsi_ioapic
;
722 * ACPI based hotplug support for CPU
724 #ifdef CONFIG_ACPI_HOTPLUG_CPU
725 #include <acpi/processor.h>
727 static int acpi_map_cpu2node(acpi_handle handle
, int cpu
, int physid
)
729 #ifdef CONFIG_ACPI_NUMA
732 nid
= acpi_get_node(handle
);
733 if (nid
!= NUMA_NO_NODE
) {
734 set_apicid_to_node(physid
, nid
);
735 numa_set_node(cpu
, nid
);
741 int acpi_map_cpu(acpi_handle handle
, phys_cpuid_t physid
, u32 acpi_id
,
746 cpu
= acpi_register_lapic(physid
, acpi_id
, 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
);
758 EXPORT_SYMBOL(acpi_map_cpu
);
760 int acpi_unmap_cpu(int cpu
)
762 #ifdef CONFIG_ACPI_NUMA
763 set_apicid_to_node(per_cpu(x86_cpu_to_apicid
, cpu
), NUMA_NO_NODE
);
766 per_cpu(x86_cpu_to_apicid
, cpu
) = -1;
767 set_cpu_present(cpu
, false);
772 EXPORT_SYMBOL(acpi_unmap_cpu
);
773 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
775 int acpi_register_ioapic(acpi_handle handle
, u64 phys_addr
, u32 gsi_base
)
778 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
781 struct ioapic_domain_cfg cfg
= {
782 .type
= IOAPIC_DOMAIN_DYNAMIC
,
783 .ops
= &mp_ioapic_irqdomain_ops
,
786 ioapic_id
= acpi_get_ioapic_id(handle
, gsi_base
, &addr
);
788 unsigned long long uid
;
791 status
= acpi_evaluate_integer(handle
, METHOD_NAME__UID
,
793 if (ACPI_FAILURE(status
)) {
794 acpi_handle_warn(handle
, "failed to get IOAPIC ID.\n");
797 ioapic_id
= (int)uid
;
800 mutex_lock(&acpi_ioapic_lock
);
801 ret
= mp_register_ioapic(ioapic_id
, phys_addr
, gsi_base
, &cfg
);
802 mutex_unlock(&acpi_ioapic_lock
);
807 EXPORT_SYMBOL(acpi_register_ioapic
);
809 int acpi_unregister_ioapic(acpi_handle handle
, u32 gsi_base
)
813 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
814 mutex_lock(&acpi_ioapic_lock
);
815 ret
= mp_unregister_ioapic(gsi_base
);
816 mutex_unlock(&acpi_ioapic_lock
);
821 EXPORT_SYMBOL(acpi_unregister_ioapic
);
824 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
825 * has been registered
826 * @handle: ACPI handle of the IOAPIC deivce
827 * @gsi_base: GSI base associated with the IOAPIC
829 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
830 * with acpi_register_ioapic()/acpi_unregister_ioapic().
832 int acpi_ioapic_registered(acpi_handle handle
, u32 gsi_base
)
836 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
837 mutex_lock(&acpi_ioapic_lock
);
838 ret
= mp_ioapic_registered(gsi_base
);
839 mutex_unlock(&acpi_ioapic_lock
);
845 static int __init
acpi_parse_sbf(struct acpi_table_header
*table
)
847 struct acpi_table_boot
*sb
= (struct acpi_table_boot
*)table
;
849 sbf_port
= sb
->cmos_index
; /* Save CMOS port */
854 #ifdef CONFIG_HPET_TIMER
855 #include <asm/hpet.h>
857 static struct resource
*hpet_res __initdata
;
859 static int __init
acpi_parse_hpet(struct acpi_table_header
*table
)
861 struct acpi_table_hpet
*hpet_tbl
= (struct acpi_table_hpet
*)table
;
863 if (hpet_tbl
->address
.space_id
!= ACPI_SPACE_MEM
) {
864 printk(KERN_WARNING PREFIX
"HPET timers must be located in "
869 hpet_address
= hpet_tbl
->address
.address
;
870 hpet_blockid
= hpet_tbl
->sequence
;
873 * Some broken BIOSes advertise HPET at 0x0. We really do not
874 * want to allocate a resource there.
877 printk(KERN_WARNING PREFIX
878 "HPET id: %#x base: %#lx is invalid\n",
879 hpet_tbl
->id
, hpet_address
);
884 * Some even more broken BIOSes advertise HPET at
885 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
888 if (hpet_address
== 0xfed0000000000000UL
) {
889 if (!hpet_force_user
) {
890 printk(KERN_WARNING PREFIX
"HPET id: %#x "
891 "base: 0xfed0000000000000 is bogus\n "
892 "try hpet=force on the kernel command line to "
893 "fix it up to 0xfed00000.\n", hpet_tbl
->id
);
897 printk(KERN_WARNING PREFIX
898 "HPET id: %#x base: 0xfed0000000000000 fixed up "
899 "to 0xfed00000.\n", hpet_tbl
->id
);
903 printk(KERN_INFO PREFIX
"HPET id: %#x base: %#lx\n",
904 hpet_tbl
->id
, hpet_address
);
907 * Allocate and initialize the HPET firmware resource for adding into
908 * the resource tree during the lateinit timeframe.
910 #define HPET_RESOURCE_NAME_SIZE 9
911 hpet_res
= alloc_bootmem(sizeof(*hpet_res
) + HPET_RESOURCE_NAME_SIZE
);
913 hpet_res
->name
= (void *)&hpet_res
[1];
914 hpet_res
->flags
= IORESOURCE_MEM
;
915 snprintf((char *)hpet_res
->name
, HPET_RESOURCE_NAME_SIZE
, "HPET %u",
918 hpet_res
->start
= hpet_address
;
919 hpet_res
->end
= hpet_address
+ (1 * 1024) - 1;
925 * hpet_insert_resource inserts the HPET resources used into the resource
928 static __init
int hpet_insert_resource(void)
933 return insert_resource(&iomem_resource
, hpet_res
);
936 late_initcall(hpet_insert_resource
);
939 #define acpi_parse_hpet NULL
942 static int __init
acpi_parse_fadt(struct acpi_table_header
*table
)
944 if (!(acpi_gbl_FADT
.boot_flags
& ACPI_FADT_LEGACY_DEVICES
)) {
945 pr_debug("ACPI: no legacy devices present\n");
946 x86_platform
.legacy
.devices
.pnpbios
= 0;
949 if (acpi_gbl_FADT
.header
.revision
>= FADT2_REVISION_ID
&&
950 !(acpi_gbl_FADT
.boot_flags
& ACPI_FADT_8042
) &&
951 x86_platform
.legacy
.i8042
!= X86_LEGACY_I8042_PLATFORM_ABSENT
) {
952 pr_debug("ACPI: i8042 controller is absent\n");
953 x86_platform
.legacy
.i8042
= X86_LEGACY_I8042_FIRMWARE_ABSENT
;
956 if (acpi_gbl_FADT
.boot_flags
& ACPI_FADT_NO_CMOS_RTC
) {
957 pr_debug("ACPI: not registering RTC platform device\n");
958 x86_platform
.legacy
.rtc
= 0;
961 #ifdef CONFIG_X86_PM_TIMER
962 /* detect the location of the ACPI PM Timer */
963 if (acpi_gbl_FADT
.header
.revision
>= FADT2_REVISION_ID
) {
965 if (acpi_gbl_FADT
.xpm_timer_block
.space_id
!=
966 ACPI_ADR_SPACE_SYSTEM_IO
)
969 pmtmr_ioport
= acpi_gbl_FADT
.xpm_timer_block
.address
;
971 * "X" fields are optional extensions to the original V1.0
972 * fields, so we must selectively expand V1.0 fields if the
973 * corresponding X field is zero.
976 pmtmr_ioport
= acpi_gbl_FADT
.pm_timer_block
;
979 pmtmr_ioport
= acpi_gbl_FADT
.pm_timer_block
;
982 printk(KERN_INFO PREFIX
"PM-Timer IO Port: %#x\n",
988 #ifdef CONFIG_X86_LOCAL_APIC
990 * Parse LAPIC entries in MADT
991 * returns 0 on success, < 0 on error
994 static int __init
early_acpi_parse_madt_lapic_addr_ovr(void)
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
);
1019 static int __init
acpi_parse_madt_lapic_entries(void)
1024 struct acpi_subtable_proc madt_proc
[2];
1026 if (!boot_cpu_has(X86_FEATURE_APIC
))
1029 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC
,
1030 acpi_parse_sapic
, MAX_LOCAL_APIC
);
1033 memset(madt_proc
, 0, sizeof(madt_proc
));
1034 madt_proc
[0].id
= ACPI_MADT_TYPE_LOCAL_APIC
;
1035 madt_proc
[0].handler
= acpi_parse_lapic
;
1036 madt_proc
[1].id
= ACPI_MADT_TYPE_LOCAL_X2APIC
;
1037 madt_proc
[1].handler
= acpi_parse_x2apic
;
1038 ret
= acpi_table_parse_entries_array(ACPI_SIG_MADT
,
1039 sizeof(struct acpi_table_madt
),
1040 madt_proc
, ARRAY_SIZE(madt_proc
), MAX_LOCAL_APIC
);
1042 printk(KERN_ERR PREFIX
1043 "Error parsing LAPIC/X2APIC entries\n");
1047 count
= madt_proc
[0].count
;
1048 x2count
= madt_proc
[1].count
;
1050 if (!count
&& !x2count
) {
1051 printk(KERN_ERR PREFIX
"No LAPIC entries present\n");
1052 /* TBD: Cleanup to allow fallback to MPS */
1054 } else if (count
< 0 || x2count
< 0) {
1055 printk(KERN_ERR PREFIX
"Error parsing LAPIC entry\n");
1056 /* TBD: Cleanup to allow fallback to MPS */
1060 x2count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI
,
1061 acpi_parse_x2apic_nmi
, 0);
1062 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI
,
1063 acpi_parse_lapic_nmi
, 0);
1064 if (count
< 0 || x2count
< 0) {
1065 printk(KERN_ERR PREFIX
"Error parsing LAPIC NMI entry\n");
1066 /* TBD: Cleanup to allow fallback to MPS */
1071 #endif /* CONFIG_X86_LOCAL_APIC */
1073 #ifdef CONFIG_X86_IO_APIC
1074 static void __init
mp_config_acpi_legacy_irqs(void)
1077 struct mpc_intsrc mp_irq
;
1081 * Fabricate the legacy ISA bus (bus #31).
1083 mp_bus_id_to_type
[MP_ISA_BUS
] = MP_BUS_ISA
;
1085 set_bit(MP_ISA_BUS
, mp_bus_not_pci
);
1086 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS
);
1089 * Use the default configuration for the IRQs 0-15. Unless
1090 * overridden by (MADT) interrupt source override entries.
1092 for (i
= 0; i
< nr_legacy_irqs(); i
++) {
1094 unsigned int dstapic
;
1098 /* Locate the gsi that irq i maps to. */
1099 if (acpi_isa_irq_to_gsi(i
, &gsi
))
1103 * Locate the IOAPIC that manages the ISA IRQ.
1105 ioapic
= mp_find_ioapic(gsi
);
1108 pin
= mp_find_ioapic_pin(ioapic
, gsi
);
1109 dstapic
= mpc_ioapic_id(ioapic
);
1111 for (idx
= 0; idx
< mp_irq_entries
; idx
++) {
1112 struct mpc_intsrc
*irq
= mp_irqs
+ idx
;
1114 /* Do we already have a mapping for this ISA IRQ? */
1115 if (irq
->srcbus
== MP_ISA_BUS
&& irq
->srcbusirq
== i
)
1118 /* Do we already have a mapping for this IOAPIC pin */
1119 if (irq
->dstapic
== dstapic
&& irq
->dstirq
== pin
)
1123 if (idx
!= mp_irq_entries
) {
1124 printk(KERN_DEBUG
"ACPI: IRQ%d used by override.\n", i
);
1125 continue; /* IRQ already used */
1128 mp_irq
.type
= MP_INTSRC
;
1129 mp_irq
.irqflag
= 0; /* Conforming */
1130 mp_irq
.srcbus
= MP_ISA_BUS
;
1131 mp_irq
.dstapic
= dstapic
;
1132 mp_irq
.irqtype
= mp_INT
;
1133 mp_irq
.srcbusirq
= i
; /* Identity mapped */
1134 mp_irq
.dstirq
= pin
;
1136 mp_save_irq(&mp_irq
);
1141 * Parse IOAPIC related entries in MADT
1142 * returns 0 on success, < 0 on error
1144 static int __init
acpi_parse_madt_ioapic_entries(void)
1149 * ACPI interpreter is required to complete interrupt setup,
1150 * so if it is off, don't enumerate the io-apics with ACPI.
1151 * If MPS is present, it will handle them,
1152 * otherwise the system will stay in PIC mode
1154 if (acpi_disabled
|| acpi_noirq
)
1157 if (!boot_cpu_has(X86_FEATURE_APIC
))
1161 * if "noapic" boot option, don't look for IO-APICs
1163 if (skip_ioapic_setup
) {
1164 printk(KERN_INFO PREFIX
"Skipping IOAPIC probe "
1165 "due to 'noapic' option.\n");
1169 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC
, acpi_parse_ioapic
,
1172 printk(KERN_ERR PREFIX
"No IOAPIC entries present\n");
1174 } else if (count
< 0) {
1175 printk(KERN_ERR PREFIX
"Error parsing IOAPIC entry\n");
1179 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE
,
1180 acpi_parse_int_src_ovr
, nr_irqs
);
1182 printk(KERN_ERR PREFIX
1183 "Error parsing interrupt source overrides entry\n");
1184 /* TBD: Cleanup to allow fallback to MPS */
1189 * If BIOS did not supply an INT_SRC_OVR for the SCI
1190 * pretend we got one so we can set the SCI flags.
1192 if (!acpi_sci_override_gsi
)
1193 acpi_sci_ioapic_setup(acpi_gbl_FADT
.sci_interrupt
, 0, 0,
1194 acpi_gbl_FADT
.sci_interrupt
);
1196 /* Fill in identity legacy mappings where no override */
1197 mp_config_acpi_legacy_irqs();
1199 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE
,
1200 acpi_parse_nmi_src
, nr_irqs
);
1202 printk(KERN_ERR PREFIX
"Error parsing NMI SRC entry\n");
1203 /* TBD: Cleanup to allow fallback to MPS */
1210 static inline int acpi_parse_madt_ioapic_entries(void)
1214 #endif /* !CONFIG_X86_IO_APIC */
1216 static void __init
early_acpi_process_madt(void)
1218 #ifdef CONFIG_X86_LOCAL_APIC
1221 if (!acpi_table_parse(ACPI_SIG_MADT
, acpi_parse_madt
)) {
1224 * Parse MADT LAPIC entries
1226 error
= early_acpi_parse_madt_lapic_addr_ovr();
1229 smp_found_config
= 1;
1231 if (error
== -EINVAL
) {
1233 * Dell Precision Workstation 410, 610 come here.
1235 printk(KERN_ERR PREFIX
1236 "Invalid BIOS MADT, disabling ACPI\n");
1243 static void __init
acpi_process_madt(void)
1245 #ifdef CONFIG_X86_LOCAL_APIC
1248 if (!acpi_table_parse(ACPI_SIG_MADT
, acpi_parse_madt
)) {
1251 * Parse MADT LAPIC entries
1253 error
= acpi_parse_madt_lapic_entries();
1258 * Parse MADT IO-APIC entries
1260 mutex_lock(&acpi_ioapic_lock
);
1261 error
= acpi_parse_madt_ioapic_entries();
1262 mutex_unlock(&acpi_ioapic_lock
);
1264 acpi_set_irq_model_ioapic();
1266 smp_found_config
= 1;
1269 if (error
== -EINVAL
) {
1271 * Dell Precision Workstation 410, 610 come here.
1273 printk(KERN_ERR PREFIX
1274 "Invalid BIOS MADT, disabling ACPI\n");
1279 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1280 * In the event an MPS table was found, forget it.
1281 * Boot with "acpi=off" to use MPS on such a system.
1283 if (smp_found_config
) {
1284 printk(KERN_WARNING PREFIX
1285 "No APIC-table, disabling MPS\n");
1286 smp_found_config
= 0;
1291 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1292 * processors, where MPS only supports physical.
1294 if (acpi_lapic
&& acpi_ioapic
)
1295 printk(KERN_INFO
"Using ACPI (MADT) for SMP configuration "
1297 else if (acpi_lapic
)
1298 printk(KERN_INFO
"Using ACPI for processor (LAPIC) "
1299 "configuration information\n");
1304 static int __init
disable_acpi_irq(const struct dmi_system_id
*d
)
1307 printk(KERN_NOTICE
"%s detected: force use of acpi=noirq\n",
1314 static int __init
disable_acpi_pci(const struct dmi_system_id
*d
)
1317 printk(KERN_NOTICE
"%s detected: force use of pci=noacpi\n",
1324 static int __init
dmi_disable_acpi(const struct dmi_system_id
*d
)
1327 printk(KERN_NOTICE
"%s detected: acpi off\n", d
->ident
);
1331 "Warning: DMI blacklist says broken, but acpi forced\n");
1337 * Force ignoring BIOS IRQ0 override
1339 static int __init
dmi_ignore_irq0_timer_override(const struct dmi_system_id
*d
)
1341 if (!acpi_skip_timer_override
) {
1342 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1344 acpi_skip_timer_override
= 1;
1350 * ACPI offers an alternative platform interface model that removes
1351 * ACPI hardware requirements for platforms that do not implement
1352 * the PC Architecture.
1354 * We initialize the Hardware-reduced ACPI model here:
1356 static void __init
acpi_reduced_hw_init(void)
1358 if (acpi_gbl_reduced_hardware
) {
1360 * Override x86_init functions and bypass legacy pic
1361 * in Hardware-reduced ACPI mode
1363 x86_init
.timers
.timer_init
= x86_init_noop
;
1364 x86_init
.irqs
.pre_vector_init
= x86_init_noop
;
1365 legacy_pic
= &null_legacy_pic
;
1370 * If your system is blacklisted here, but you find that acpi=force
1371 * works for you, please contact linux-acpi@vger.kernel.org
1373 static struct dmi_system_id __initdata acpi_dmi_table
[] = {
1375 * Boxes that need ACPI disabled
1378 .callback
= dmi_disable_acpi
,
1379 .ident
= "IBM Thinkpad",
1381 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1382 DMI_MATCH(DMI_BOARD_NAME
, "2629H1G"),
1387 * Boxes that need ACPI PCI IRQ routing disabled
1390 .callback
= disable_acpi_irq
,
1391 .ident
= "ASUS A7V",
1393 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC"),
1394 DMI_MATCH(DMI_BOARD_NAME
, "<A7V>"),
1395 /* newer BIOS, Revision 1011, does work */
1396 DMI_MATCH(DMI_BIOS_VERSION
,
1397 "ASUS A7V ACPI BIOS Revision 1007"),
1402 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1403 * for LPC bridge, which is needed for the PCI
1404 * interrupt links to work. DSDT fix is in bug 5966.
1405 * 2645, 2646 model numbers are shared with 600/600E/600X
1407 .callback
= disable_acpi_irq
,
1408 .ident
= "IBM Thinkpad 600 Series 2645",
1410 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1411 DMI_MATCH(DMI_BOARD_NAME
, "2645"),
1415 .callback
= disable_acpi_irq
,
1416 .ident
= "IBM Thinkpad 600 Series 2646",
1418 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1419 DMI_MATCH(DMI_BOARD_NAME
, "2646"),
1423 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1426 .callback
= disable_acpi_pci
,
1427 .ident
= "ASUS PR-DLS",
1429 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1430 DMI_MATCH(DMI_BOARD_NAME
, "PR-DLS"),
1431 DMI_MATCH(DMI_BIOS_VERSION
,
1432 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1433 DMI_MATCH(DMI_BIOS_DATE
, "03/21/2003")
1437 .callback
= disable_acpi_pci
,
1438 .ident
= "Acer TravelMate 36x Laptop",
1440 DMI_MATCH(DMI_SYS_VENDOR
, "Acer"),
1441 DMI_MATCH(DMI_PRODUCT_NAME
, "TravelMate 360"),
1447 /* second table for DMI checks that should run after early-quirks */
1448 static struct dmi_system_id __initdata acpi_dmi_table_late
[] = {
1450 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1451 * which includes some code which overrides all temperature
1452 * trip points to 16C if the INTIN2 input of the I/O APIC
1453 * is enabled. This input is incorrectly designated the
1454 * ISA IRQ 0 via an interrupt source override even though
1455 * it is wired to the output of the master 8259A and INTIN0
1456 * is not connected at all. Force ignoring BIOS IRQ0
1457 * override in that cases.
1460 .callback
= dmi_ignore_irq0_timer_override
,
1461 .ident
= "HP nx6115 laptop",
1463 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1464 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq nx6115"),
1468 .callback
= dmi_ignore_irq0_timer_override
,
1469 .ident
= "HP NX6125 laptop",
1471 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1472 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq nx6125"),
1476 .callback
= dmi_ignore_irq0_timer_override
,
1477 .ident
= "HP NX6325 laptop",
1479 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1480 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq nx6325"),
1484 .callback
= dmi_ignore_irq0_timer_override
,
1485 .ident
= "HP 6715b laptop",
1487 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1488 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq 6715b"),
1492 .callback
= dmi_ignore_irq0_timer_override
,
1493 .ident
= "FUJITSU SIEMENS",
1495 DMI_MATCH(DMI_SYS_VENDOR
, "FUJITSU SIEMENS"),
1496 DMI_MATCH(DMI_PRODUCT_NAME
, "AMILO PRO V2030"),
1503 * acpi_boot_table_init() and acpi_boot_init()
1504 * called from setup_arch(), always.
1505 * 1. checksums all tables
1506 * 2. enumerates lapics
1507 * 3. enumerates io-apics
1509 * acpi_table_init() is separate to allow reading SRAT without
1510 * other side effects.
1512 * side effects of acpi_boot_init:
1513 * acpi_lapic = 1 if LAPIC found
1514 * acpi_ioapic = 1 if IOAPIC found
1515 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1516 * if acpi_blacklisted() acpi_disabled = 1;
1517 * acpi_irq_model=...
1521 void __init
acpi_boot_table_init(void)
1523 dmi_check_system(acpi_dmi_table
);
1526 * If acpi_disabled, bail out
1532 * Initialize the ACPI boot-time table parser.
1534 if (acpi_table_init()) {
1539 acpi_table_parse(ACPI_SIG_BOOT
, acpi_parse_sbf
);
1542 * blacklist may disable ACPI entirely
1544 if (acpi_blacklisted()) {
1546 printk(KERN_WARNING PREFIX
"acpi=force override\n");
1548 printk(KERN_WARNING PREFIX
"Disabling ACPI support\n");
1555 int __init
early_acpi_boot_init(void)
1558 * If acpi_disabled, bail out
1564 * Process the Multiple APIC Description Table (MADT), if present
1566 early_acpi_process_madt();
1569 * Hardware-reduced ACPI mode initialization:
1571 acpi_reduced_hw_init();
1576 int __init
acpi_boot_init(void)
1578 /* those are executed after early-quirks are executed */
1579 dmi_check_system(acpi_dmi_table_late
);
1582 * If acpi_disabled, bail out
1587 acpi_table_parse(ACPI_SIG_BOOT
, acpi_parse_sbf
);
1590 * set sci_int and PM timer address
1592 acpi_table_parse(ACPI_SIG_FADT
, acpi_parse_fadt
);
1595 * Process the Multiple APIC Description Table (MADT), if present
1597 acpi_process_madt();
1599 acpi_table_parse(ACPI_SIG_HPET
, acpi_parse_hpet
);
1600 if (IS_ENABLED(CONFIG_ACPI_BGRT
))
1601 acpi_table_parse(ACPI_SIG_BGRT
, acpi_parse_bgrt
);
1604 x86_init
.pci
.init
= pci_acpi_init
;
1609 static int __init
parse_acpi(char *arg
)
1614 /* "acpi=off" disables both ACPI table parsing and interpreter */
1615 if (strcmp(arg
, "off") == 0) {
1618 /* acpi=force to over-ride black-list */
1619 else if (strcmp(arg
, "force") == 0) {
1623 /* acpi=strict disables out-of-spec workarounds */
1624 else if (strcmp(arg
, "strict") == 0) {
1627 /* acpi=rsdt use RSDT instead of XSDT */
1628 else if (strcmp(arg
, "rsdt") == 0) {
1629 acpi_gbl_do_not_use_xsdt
= TRUE
;
1631 /* "acpi=noirq" disables ACPI interrupt routing */
1632 else if (strcmp(arg
, "noirq") == 0) {
1635 /* "acpi=copy_dsdt" copys DSDT */
1636 else if (strcmp(arg
, "copy_dsdt") == 0) {
1637 acpi_gbl_copy_dsdt_locally
= 1;
1639 /* "acpi=nocmcff" disables FF mode for corrected errors */
1640 else if (strcmp(arg
, "nocmcff") == 0) {
1641 acpi_disable_cmcff
= 1;
1643 /* Core will printk when we return error. */
1648 early_param("acpi", parse_acpi
);
1650 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1651 static int __init
parse_pci(char *arg
)
1653 if (arg
&& strcmp(arg
, "noacpi") == 0)
1657 early_param("pci", parse_pci
);
1659 int __init
acpi_mps_check(void)
1661 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1662 /* mptable code is not built-in*/
1663 if (acpi_disabled
|| acpi_noirq
) {
1664 printk(KERN_WARNING
"MPS support code is not built-in.\n"
1665 "Using acpi=off or acpi=noirq or pci=noacpi "
1666 "may have problem\n");
1673 #ifdef CONFIG_X86_IO_APIC
1674 static int __init
parse_acpi_skip_timer_override(char *arg
)
1676 acpi_skip_timer_override
= 1;
1679 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override
);
1681 static int __init
parse_acpi_use_timer_override(char *arg
)
1683 acpi_use_timer_override
= 1;
1686 early_param("acpi_use_timer_override", parse_acpi_use_timer_override
);
1687 #endif /* CONFIG_X86_IO_APIC */
1689 static int __init
setup_acpi_sci(char *s
)
1693 if (!strcmp(s
, "edge"))
1694 acpi_sci_flags
= ACPI_MADT_TRIGGER_EDGE
|
1695 (acpi_sci_flags
& ~ACPI_MADT_TRIGGER_MASK
);
1696 else if (!strcmp(s
, "level"))
1697 acpi_sci_flags
= ACPI_MADT_TRIGGER_LEVEL
|
1698 (acpi_sci_flags
& ~ACPI_MADT_TRIGGER_MASK
);
1699 else if (!strcmp(s
, "high"))
1700 acpi_sci_flags
= ACPI_MADT_POLARITY_ACTIVE_HIGH
|
1701 (acpi_sci_flags
& ~ACPI_MADT_POLARITY_MASK
);
1702 else if (!strcmp(s
, "low"))
1703 acpi_sci_flags
= ACPI_MADT_POLARITY_ACTIVE_LOW
|
1704 (acpi_sci_flags
& ~ACPI_MADT_POLARITY_MASK
);
1709 early_param("acpi_sci", setup_acpi_sci
);
1711 int __acpi_acquire_global_lock(unsigned int *lock
)
1713 unsigned int old
, new, val
;
1716 new = (((old
& ~0x3) + 2) + ((old
>> 1) & 0x1));
1717 val
= cmpxchg(lock
, old
, new);
1718 } while (unlikely (val
!= old
));
1719 return (new < 3) ? -1 : 0;
1722 int __acpi_release_global_lock(unsigned int *lock
)
1724 unsigned int old
, new, val
;
1728 val
= cmpxchg(lock
, old
, new);
1729 } while (unlikely (val
!= old
));
1733 void __init
arch_reserve_mem_area(acpi_physical_address addr
, size_t size
)
1735 e820__range_add(addr
, size
, E820_TYPE_ACPI
);
1736 e820__update_table_print();