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/irqdomain.h>
41 #include <asm/pci_x86.h>
42 #include <asm/pgtable.h>
43 #include <asm/io_apic.h>
46 #include <asm/mpspec.h>
48 #include <asm/i8259.h>
50 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
51 static int __initdata acpi_force
= 0;
53 EXPORT_SYMBOL(acpi_disabled
);
56 # include <asm/proto.h>
59 #define PREFIX "ACPI: "
61 int acpi_noirq
; /* skip ACPI IRQ initialization */
62 int acpi_pci_disabled
; /* skip ACPI PCI scan and IRQ initialization */
63 EXPORT_SYMBOL(acpi_pci_disabled
);
68 int acpi_disable_cmcff
;
70 u8 acpi_sci_flags __initdata
;
71 int acpi_sci_override_gsi __initdata
;
72 int acpi_skip_timer_override __initdata
;
73 int acpi_use_timer_override __initdata
;
74 int acpi_fix_pin2_polarity __initdata
;
76 #ifdef CONFIG_X86_LOCAL_APIC
77 static u64 acpi_lapic_addr __initdata
= APIC_DEFAULT_PHYS_BASE
;
80 #ifdef CONFIG_X86_IO_APIC
82 * Locks related to IOAPIC hotplug
84 * ->device_hotplug_lock
87 * Interrupt mapping side:
92 static DEFINE_MUTEX(acpi_ioapic_lock
);
95 /* --------------------------------------------------------------------------
96 Boot-time Configuration
97 -------------------------------------------------------------------------- */
100 * The default interrupt routing model is PIC (8259). This gets
101 * overridden if IOAPICs are enumerated (below).
103 enum acpi_irq_model_id acpi_irq_model
= ACPI_IRQ_MODEL_PIC
;
107 * ISA irqs by default are the first 16 gsis but can be
108 * any gsi as specified by an interrupt source override.
110 static u32 isa_irq_to_gsi
[NR_IRQS_LEGACY
] __read_mostly
= {
111 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
114 #define ACPI_INVALID_GSI INT_MIN
117 * This is just a simple wrapper around early_ioremap(),
118 * with sanity checks for phys == 0 and size == 0.
120 char *__init
__acpi_map_table(unsigned long phys
, unsigned long size
)
126 return early_ioremap(phys
, size
);
129 void __init
__acpi_unmap_table(char *map
, unsigned long size
)
134 early_iounmap(map
, size
);
137 #ifdef CONFIG_X86_LOCAL_APIC
138 static int __init
acpi_parse_madt(struct acpi_table_header
*table
)
140 struct acpi_table_madt
*madt
= NULL
;
142 if (!boot_cpu_has(X86_FEATURE_APIC
))
145 madt
= (struct acpi_table_madt
*)table
;
147 printk(KERN_WARNING PREFIX
"Unable to map MADT\n");
152 acpi_lapic_addr
= (u64
) madt
->address
;
154 printk(KERN_DEBUG PREFIX
"Local APIC address 0x%08x\n",
158 default_acpi_madt_oem_check(madt
->header
.oem_id
,
159 madt
->header
.oem_table_id
);
165 * acpi_register_lapic - register a local apic and generates a logic cpu number
166 * @id: local apic id to register
167 * @acpiid: ACPI id to register
168 * @enabled: this cpu is enabled or not
170 * Returns the logic cpu number which maps to the local apic
172 static int acpi_register_lapic(int id
, u32 acpiid
, u8 enabled
)
174 unsigned int ver
= 0;
177 if (id
>= MAX_LOCAL_APIC
) {
178 printk(KERN_INFO PREFIX
"skipped apicid that is too big\n");
182 if (boot_cpu_physical_apicid
!= -1U)
183 ver
= boot_cpu_apic_version
;
185 cpu
= __generic_processor_info(id
, ver
, enabled
);
187 early_per_cpu(x86_cpu_to_acpiid
, cpu
) = acpiid
;
193 acpi_parse_x2apic(struct acpi_subtable_header
*header
, const unsigned long end
)
195 struct acpi_madt_local_x2apic
*processor
= NULL
;
199 processor
= (struct acpi_madt_local_x2apic
*)header
;
201 if (BAD_MADT_ENTRY(processor
, end
))
204 acpi_table_print_madt_entry(header
);
206 apic_id
= processor
->local_apic_id
;
207 enabled
= processor
->lapic_flags
& ACPI_MADT_ENABLED
;
208 #ifdef CONFIG_X86_X2APIC
210 * We need to register disabled CPU as well to permit
211 * counting disabled CPUs. This allows us to size
212 * cpus_possible_map more accurately, to permit
213 * to not preallocating memory for all NR_CPUS
214 * when we use CPU hotplug.
216 if (!apic
->apic_id_valid(apic_id
) && enabled
)
217 printk(KERN_WARNING PREFIX
"x2apic entry ignored\n");
219 acpi_register_lapic(apic_id
, processor
->uid
, enabled
);
221 printk(KERN_WARNING PREFIX
"x2apic entry ignored\n");
228 acpi_parse_lapic(struct acpi_subtable_header
* header
, const unsigned long end
)
230 struct acpi_madt_local_apic
*processor
= NULL
;
232 processor
= (struct acpi_madt_local_apic
*)header
;
234 if (BAD_MADT_ENTRY(processor
, end
))
237 acpi_table_print_madt_entry(header
);
239 /* Ignore invalid ID */
240 if (processor
->id
== 0xff)
244 * We need to register disabled CPU as well to permit
245 * counting disabled CPUs. This allows us to size
246 * cpus_possible_map more accurately, to permit
247 * to not preallocating memory for all NR_CPUS
248 * when we use CPU hotplug.
250 acpi_register_lapic(processor
->id
, /* APIC ID */
251 processor
->processor_id
, /* ACPI ID */
252 processor
->lapic_flags
& ACPI_MADT_ENABLED
);
258 acpi_parse_sapic(struct acpi_subtable_header
*header
, const unsigned long end
)
260 struct acpi_madt_local_sapic
*processor
= NULL
;
262 processor
= (struct acpi_madt_local_sapic
*)header
;
264 if (BAD_MADT_ENTRY(processor
, end
))
267 acpi_table_print_madt_entry(header
);
269 acpi_register_lapic((processor
->id
<< 8) | processor
->eid
,/* APIC ID */
270 processor
->processor_id
, /* ACPI ID */
271 processor
->lapic_flags
& ACPI_MADT_ENABLED
);
277 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header
* header
,
278 const unsigned long end
)
280 struct acpi_madt_local_apic_override
*lapic_addr_ovr
= NULL
;
282 lapic_addr_ovr
= (struct acpi_madt_local_apic_override
*)header
;
284 if (BAD_MADT_ENTRY(lapic_addr_ovr
, end
))
287 acpi_table_print_madt_entry(header
);
289 acpi_lapic_addr
= lapic_addr_ovr
->address
;
295 acpi_parse_x2apic_nmi(struct acpi_subtable_header
*header
,
296 const unsigned long end
)
298 struct acpi_madt_local_x2apic_nmi
*x2apic_nmi
= NULL
;
300 x2apic_nmi
= (struct acpi_madt_local_x2apic_nmi
*)header
;
302 if (BAD_MADT_ENTRY(x2apic_nmi
, end
))
305 acpi_table_print_madt_entry(header
);
307 if (x2apic_nmi
->lint
!= 1)
308 printk(KERN_WARNING PREFIX
"NMI not connected to LINT 1!\n");
314 acpi_parse_lapic_nmi(struct acpi_subtable_header
* header
, const unsigned long end
)
316 struct acpi_madt_local_apic_nmi
*lapic_nmi
= NULL
;
318 lapic_nmi
= (struct acpi_madt_local_apic_nmi
*)header
;
320 if (BAD_MADT_ENTRY(lapic_nmi
, end
))
323 acpi_table_print_madt_entry(header
);
325 if (lapic_nmi
->lint
!= 1)
326 printk(KERN_WARNING PREFIX
"NMI not connected to LINT 1!\n");
331 #endif /*CONFIG_X86_LOCAL_APIC */
333 #ifdef CONFIG_X86_IO_APIC
336 static void __init
mp_override_legacy_irq(u8 bus_irq
, u8 polarity
, u8 trigger
,
341 struct mpc_intsrc mp_irq
;
344 * Convert 'gsi' to 'ioapic.pin'.
346 ioapic
= mp_find_ioapic(gsi
);
349 pin
= mp_find_ioapic_pin(ioapic
, gsi
);
352 * TBD: This check is for faulty timer entries, where the override
353 * erroneously sets the trigger to level, resulting in a HUGE
354 * increase of timer interrupts!
356 if ((bus_irq
== 0) && (trigger
== 3))
359 mp_irq
.type
= MP_INTSRC
;
360 mp_irq
.irqtype
= mp_INT
;
361 mp_irq
.irqflag
= (trigger
<< 2) | polarity
;
362 mp_irq
.srcbus
= MP_ISA_BUS
;
363 mp_irq
.srcbusirq
= bus_irq
; /* IRQ */
364 mp_irq
.dstapic
= mpc_ioapic_id(ioapic
); /* APIC ID */
365 mp_irq
.dstirq
= pin
; /* INTIN# */
367 mp_save_irq(&mp_irq
);
370 * Reset default identity mapping if gsi is also an legacy IRQ,
371 * otherwise there will be more than one entry with the same GSI
372 * and acpi_isa_irq_to_gsi() may give wrong result.
374 if (gsi
< nr_legacy_irqs() && isa_irq_to_gsi
[gsi
] == gsi
)
375 isa_irq_to_gsi
[gsi
] = ACPI_INVALID_GSI
;
376 isa_irq_to_gsi
[bus_irq
] = gsi
;
379 static int mp_config_acpi_gsi(struct device
*dev
, u32 gsi
, int trigger
,
382 #ifdef CONFIG_X86_MPPARSE
383 struct mpc_intsrc mp_irq
;
384 struct pci_dev
*pdev
;
385 unsigned char number
;
392 if (!dev
|| !dev_is_pci(dev
))
395 pdev
= to_pci_dev(dev
);
396 number
= pdev
->bus
->number
;
399 /* print the entry should happen on mptable identically */
400 mp_irq
.type
= MP_INTSRC
;
401 mp_irq
.irqtype
= mp_INT
;
402 mp_irq
.irqflag
= (trigger
== ACPI_EDGE_SENSITIVE
? 4 : 0x0c) |
403 (polarity
== ACPI_ACTIVE_HIGH
? 1 : 3);
404 mp_irq
.srcbus
= number
;
405 mp_irq
.srcbusirq
= (((devfn
>> 3) & 0x1f) << 2) | ((pin
- 1) & 3);
406 ioapic
= mp_find_ioapic(gsi
);
407 mp_irq
.dstapic
= mpc_ioapic_id(ioapic
);
408 mp_irq
.dstirq
= mp_find_ioapic_pin(ioapic
, gsi
);
410 mp_save_irq(&mp_irq
);
416 acpi_parse_ioapic(struct acpi_subtable_header
* header
, const unsigned long end
)
418 struct acpi_madt_io_apic
*ioapic
= NULL
;
419 struct ioapic_domain_cfg cfg
= {
420 .type
= IOAPIC_DOMAIN_DYNAMIC
,
421 .ops
= &mp_ioapic_irqdomain_ops
,
424 ioapic
= (struct acpi_madt_io_apic
*)header
;
426 if (BAD_MADT_ENTRY(ioapic
, end
))
429 acpi_table_print_madt_entry(header
);
431 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
432 if (ioapic
->global_irq_base
< nr_legacy_irqs())
433 cfg
.type
= IOAPIC_DOMAIN_LEGACY
;
435 mp_register_ioapic(ioapic
->id
, ioapic
->address
, ioapic
->global_irq_base
,
442 * Parse Interrupt Source Override for the ACPI SCI
444 static void __init
acpi_sci_ioapic_setup(u8 bus_irq
, u16 polarity
, u16 trigger
, u32 gsi
)
446 if (trigger
== 0) /* compatible SCI trigger is level */
449 if (polarity
== 0) /* compatible SCI polarity is low */
452 /* Command-line over-ride via acpi_sci= */
453 if (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
)
454 trigger
= (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2;
456 if (acpi_sci_flags
& ACPI_MADT_POLARITY_MASK
)
457 polarity
= acpi_sci_flags
& ACPI_MADT_POLARITY_MASK
;
459 mp_override_legacy_irq(bus_irq
, polarity
, trigger
, gsi
);
460 acpi_penalize_sci_irq(bus_irq
, trigger
, polarity
);
463 * stash over-ride to indicate we've been here
464 * and for later update of acpi_gbl_FADT
466 acpi_sci_override_gsi
= gsi
;
471 acpi_parse_int_src_ovr(struct acpi_subtable_header
* header
,
472 const unsigned long end
)
474 struct acpi_madt_interrupt_override
*intsrc
= NULL
;
476 intsrc
= (struct acpi_madt_interrupt_override
*)header
;
478 if (BAD_MADT_ENTRY(intsrc
, end
))
481 acpi_table_print_madt_entry(header
);
483 if (intsrc
->source_irq
== acpi_gbl_FADT
.sci_interrupt
) {
484 acpi_sci_ioapic_setup(intsrc
->source_irq
,
485 intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
,
486 (intsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2,
491 if (intsrc
->source_irq
== 0) {
492 if (acpi_skip_timer_override
) {
493 printk(PREFIX
"BIOS IRQ0 override ignored.\n");
497 if ((intsrc
->global_irq
== 2) && acpi_fix_pin2_polarity
498 && (intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
)) {
499 intsrc
->inti_flags
&= ~ACPI_MADT_POLARITY_MASK
;
500 printk(PREFIX
"BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
504 mp_override_legacy_irq(intsrc
->source_irq
,
505 intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
,
506 (intsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2,
513 acpi_parse_nmi_src(struct acpi_subtable_header
* header
, const unsigned long end
)
515 struct acpi_madt_nmi_source
*nmi_src
= NULL
;
517 nmi_src
= (struct acpi_madt_nmi_source
*)header
;
519 if (BAD_MADT_ENTRY(nmi_src
, end
))
522 acpi_table_print_madt_entry(header
);
524 /* TBD: Support nimsrc entries? */
529 #endif /* CONFIG_X86_IO_APIC */
532 * acpi_pic_sci_set_trigger()
534 * use ELCR to set PIC-mode trigger type for SCI
536 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
537 * it may require Edge Trigger -- use "acpi_sci=edge"
539 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
540 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
541 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
542 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
545 void __init
acpi_pic_sci_set_trigger(unsigned int irq
, u16 trigger
)
547 unsigned int mask
= 1 << irq
;
548 unsigned int old
, new;
550 /* Real old ELCR mask */
551 old
= inb(0x4d0) | (inb(0x4d1) << 8);
554 * If we use ACPI to set PCI IRQs, then we should clear ELCR
555 * since we will set it correctly as we enable the PCI irq
558 new = acpi_noirq
? old
: 0;
561 * Update SCI information in the ELCR, it isn't in the PCI
565 case 1: /* Edge - clear */
568 case 3: /* Level - set */
576 printk(PREFIX
"setting ELCR to %04x (from %04x)\n", new, old
);
578 outb(new >> 8, 0x4d1);
581 int acpi_gsi_to_irq(u32 gsi
, unsigned int *irqp
)
583 int rc
, irq
, trigger
, polarity
;
585 if (acpi_irq_model
== ACPI_IRQ_MODEL_PIC
) {
590 rc
= acpi_get_override_irq(gsi
, &trigger
, &polarity
);
592 trigger
= trigger
? ACPI_LEVEL_SENSITIVE
: ACPI_EDGE_SENSITIVE
;
593 polarity
= polarity
? ACPI_ACTIVE_LOW
: ACPI_ACTIVE_HIGH
;
594 irq
= acpi_register_gsi(NULL
, gsi
, trigger
, polarity
);
603 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq
);
605 int acpi_isa_irq_to_gsi(unsigned isa_irq
, u32
*gsi
)
607 if (isa_irq
< nr_legacy_irqs() &&
608 isa_irq_to_gsi
[isa_irq
] != ACPI_INVALID_GSI
) {
609 *gsi
= isa_irq_to_gsi
[isa_irq
];
616 static int acpi_register_gsi_pic(struct device
*dev
, u32 gsi
,
617 int trigger
, int polarity
)
621 * Make sure all (legacy) PCI IRQs are set as level-triggered.
623 if (trigger
== ACPI_LEVEL_SENSITIVE
)
624 elcr_set_level_irq(gsi
);
630 #ifdef CONFIG_X86_LOCAL_APIC
631 static int acpi_register_gsi_ioapic(struct device
*dev
, u32 gsi
,
632 int trigger
, int polarity
)
635 #ifdef CONFIG_X86_IO_APIC
637 struct irq_alloc_info info
;
639 node
= dev
? dev_to_node(dev
) : NUMA_NO_NODE
;
640 trigger
= trigger
== ACPI_EDGE_SENSITIVE
? 0 : 1;
641 polarity
= polarity
== ACPI_ACTIVE_HIGH
? 0 : 1;
642 ioapic_set_alloc_attr(&info
, node
, trigger
, polarity
);
644 mutex_lock(&acpi_ioapic_lock
);
645 irq
= mp_map_gsi_to_irq(gsi
, IOAPIC_MAP_ALLOC
, &info
);
646 /* Don't set up the ACPI SCI because it's already set up */
647 if (irq
>= 0 && enable_update_mptable
&&
648 acpi_gbl_FADT
.sci_interrupt
!= gsi
)
649 mp_config_acpi_gsi(dev
, gsi
, trigger
, polarity
);
650 mutex_unlock(&acpi_ioapic_lock
);
656 static void acpi_unregister_gsi_ioapic(u32 gsi
)
658 #ifdef CONFIG_X86_IO_APIC
661 mutex_lock(&acpi_ioapic_lock
);
662 irq
= mp_map_gsi_to_irq(gsi
, 0, NULL
);
665 mutex_unlock(&acpi_ioapic_lock
);
670 int (*__acpi_register_gsi
)(struct device
*dev
, u32 gsi
,
671 int trigger
, int polarity
) = acpi_register_gsi_pic
;
672 void (*__acpi_unregister_gsi
)(u32 gsi
) = NULL
;
674 #ifdef CONFIG_ACPI_SLEEP
675 int (*acpi_suspend_lowlevel
)(void) = x86_acpi_suspend_lowlevel
;
677 int (*acpi_suspend_lowlevel
)(void);
681 * success: return IRQ number (>=0)
682 * failure: return < 0
684 int acpi_register_gsi(struct device
*dev
, u32 gsi
, int trigger
, int polarity
)
686 return __acpi_register_gsi(dev
, gsi
, trigger
, polarity
);
688 EXPORT_SYMBOL_GPL(acpi_register_gsi
);
690 void acpi_unregister_gsi(u32 gsi
)
692 if (__acpi_unregister_gsi
)
693 __acpi_unregister_gsi(gsi
);
695 EXPORT_SYMBOL_GPL(acpi_unregister_gsi
);
697 #ifdef CONFIG_X86_LOCAL_APIC
698 static void __init
acpi_set_irq_model_ioapic(void)
700 acpi_irq_model
= ACPI_IRQ_MODEL_IOAPIC
;
701 __acpi_register_gsi
= acpi_register_gsi_ioapic
;
702 __acpi_unregister_gsi
= acpi_unregister_gsi_ioapic
;
708 * ACPI based hotplug support for CPU
710 #ifdef CONFIG_ACPI_HOTPLUG_CPU
711 #include <acpi/processor.h>
713 int acpi_map_cpu2node(acpi_handle handle
, int cpu
, int physid
)
715 #ifdef CONFIG_ACPI_NUMA
718 nid
= acpi_get_node(handle
);
719 if (nid
!= NUMA_NO_NODE
) {
720 set_apicid_to_node(physid
, nid
);
721 numa_set_node(cpu
, nid
);
727 int acpi_map_cpu(acpi_handle handle
, phys_cpuid_t physid
, u32 acpi_id
,
732 cpu
= acpi_register_lapic(physid
, acpi_id
, ACPI_MADT_ENABLED
);
734 pr_info(PREFIX
"Unable to map lapic to logical cpu number\n");
738 acpi_processor_set_pdc(handle
);
739 acpi_map_cpu2node(handle
, cpu
, physid
);
744 EXPORT_SYMBOL(acpi_map_cpu
);
746 int acpi_unmap_cpu(int cpu
)
748 #ifdef CONFIG_ACPI_NUMA
749 set_apicid_to_node(per_cpu(x86_cpu_to_apicid
, cpu
), NUMA_NO_NODE
);
752 per_cpu(x86_cpu_to_apicid
, cpu
) = -1;
753 set_cpu_present(cpu
, false);
758 EXPORT_SYMBOL(acpi_unmap_cpu
);
759 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
761 int acpi_register_ioapic(acpi_handle handle
, u64 phys_addr
, u32 gsi_base
)
764 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
767 struct ioapic_domain_cfg cfg
= {
768 .type
= IOAPIC_DOMAIN_DYNAMIC
,
769 .ops
= &mp_ioapic_irqdomain_ops
,
772 ioapic_id
= acpi_get_ioapic_id(handle
, gsi_base
, &addr
);
774 unsigned long long uid
;
777 status
= acpi_evaluate_integer(handle
, METHOD_NAME__UID
,
779 if (ACPI_FAILURE(status
)) {
780 acpi_handle_warn(handle
, "failed to get IOAPIC ID.\n");
783 ioapic_id
= (int)uid
;
786 mutex_lock(&acpi_ioapic_lock
);
787 ret
= mp_register_ioapic(ioapic_id
, phys_addr
, gsi_base
, &cfg
);
788 mutex_unlock(&acpi_ioapic_lock
);
793 EXPORT_SYMBOL(acpi_register_ioapic
);
795 int acpi_unregister_ioapic(acpi_handle handle
, u32 gsi_base
)
799 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
800 mutex_lock(&acpi_ioapic_lock
);
801 ret
= mp_unregister_ioapic(gsi_base
);
802 mutex_unlock(&acpi_ioapic_lock
);
807 EXPORT_SYMBOL(acpi_unregister_ioapic
);
810 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
811 * has been registered
812 * @handle: ACPI handle of the IOAPIC deivce
813 * @gsi_base: GSI base associated with the IOAPIC
815 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
816 * with acpi_register_ioapic()/acpi_unregister_ioapic().
818 int acpi_ioapic_registered(acpi_handle handle
, u32 gsi_base
)
822 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
823 mutex_lock(&acpi_ioapic_lock
);
824 ret
= mp_ioapic_registered(gsi_base
);
825 mutex_unlock(&acpi_ioapic_lock
);
831 static int __init
acpi_parse_sbf(struct acpi_table_header
*table
)
833 struct acpi_table_boot
*sb
= (struct acpi_table_boot
*)table
;
835 sbf_port
= sb
->cmos_index
; /* Save CMOS port */
840 #ifdef CONFIG_HPET_TIMER
841 #include <asm/hpet.h>
843 static struct resource
*hpet_res __initdata
;
845 static int __init
acpi_parse_hpet(struct acpi_table_header
*table
)
847 struct acpi_table_hpet
*hpet_tbl
= (struct acpi_table_hpet
*)table
;
849 if (hpet_tbl
->address
.space_id
!= ACPI_SPACE_MEM
) {
850 printk(KERN_WARNING PREFIX
"HPET timers must be located in "
855 hpet_address
= hpet_tbl
->address
.address
;
856 hpet_blockid
= hpet_tbl
->sequence
;
859 * Some broken BIOSes advertise HPET at 0x0. We really do not
860 * want to allocate a resource there.
863 printk(KERN_WARNING PREFIX
864 "HPET id: %#x base: %#lx is invalid\n",
865 hpet_tbl
->id
, hpet_address
);
870 * Some even more broken BIOSes advertise HPET at
871 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
874 if (hpet_address
== 0xfed0000000000000UL
) {
875 if (!hpet_force_user
) {
876 printk(KERN_WARNING PREFIX
"HPET id: %#x "
877 "base: 0xfed0000000000000 is bogus\n "
878 "try hpet=force on the kernel command line to "
879 "fix it up to 0xfed00000.\n", hpet_tbl
->id
);
883 printk(KERN_WARNING PREFIX
884 "HPET id: %#x base: 0xfed0000000000000 fixed up "
885 "to 0xfed00000.\n", hpet_tbl
->id
);
889 printk(KERN_INFO PREFIX
"HPET id: %#x base: %#lx\n",
890 hpet_tbl
->id
, hpet_address
);
893 * Allocate and initialize the HPET firmware resource for adding into
894 * the resource tree during the lateinit timeframe.
896 #define HPET_RESOURCE_NAME_SIZE 9
897 hpet_res
= alloc_bootmem(sizeof(*hpet_res
) + HPET_RESOURCE_NAME_SIZE
);
899 hpet_res
->name
= (void *)&hpet_res
[1];
900 hpet_res
->flags
= IORESOURCE_MEM
;
901 snprintf((char *)hpet_res
->name
, HPET_RESOURCE_NAME_SIZE
, "HPET %u",
904 hpet_res
->start
= hpet_address
;
905 hpet_res
->end
= hpet_address
+ (1 * 1024) - 1;
911 * hpet_insert_resource inserts the HPET resources used into the resource
914 static __init
int hpet_insert_resource(void)
919 return insert_resource(&iomem_resource
, hpet_res
);
922 late_initcall(hpet_insert_resource
);
925 #define acpi_parse_hpet NULL
928 static int __init
acpi_parse_fadt(struct acpi_table_header
*table
)
930 if (!(acpi_gbl_FADT
.boot_flags
& ACPI_FADT_LEGACY_DEVICES
)) {
931 pr_debug("ACPI: no legacy devices present\n");
932 x86_platform
.legacy
.devices
.pnpbios
= 0;
935 if (acpi_gbl_FADT
.header
.revision
>= FADT2_REVISION_ID
&&
936 !(acpi_gbl_FADT
.boot_flags
& ACPI_FADT_8042
) &&
937 x86_platform
.legacy
.i8042
!= X86_LEGACY_I8042_PLATFORM_ABSENT
) {
938 pr_debug("ACPI: i8042 controller is absent\n");
939 x86_platform
.legacy
.i8042
= X86_LEGACY_I8042_FIRMWARE_ABSENT
;
942 if (acpi_gbl_FADT
.boot_flags
& ACPI_FADT_NO_CMOS_RTC
) {
943 pr_debug("ACPI: not registering RTC platform device\n");
944 x86_platform
.legacy
.rtc
= 0;
947 #ifdef CONFIG_X86_PM_TIMER
948 /* detect the location of the ACPI PM Timer */
949 if (acpi_gbl_FADT
.header
.revision
>= FADT2_REVISION_ID
) {
951 if (acpi_gbl_FADT
.xpm_timer_block
.space_id
!=
952 ACPI_ADR_SPACE_SYSTEM_IO
)
955 pmtmr_ioport
= acpi_gbl_FADT
.xpm_timer_block
.address
;
957 * "X" fields are optional extensions to the original V1.0
958 * fields, so we must selectively expand V1.0 fields if the
959 * corresponding X field is zero.
962 pmtmr_ioport
= acpi_gbl_FADT
.pm_timer_block
;
965 pmtmr_ioport
= acpi_gbl_FADT
.pm_timer_block
;
968 printk(KERN_INFO PREFIX
"PM-Timer IO Port: %#x\n",
974 #ifdef CONFIG_X86_LOCAL_APIC
976 * Parse LAPIC entries in MADT
977 * returns 0 on success, < 0 on error
980 static int __init
early_acpi_parse_madt_lapic_addr_ovr(void)
984 if (!boot_cpu_has(X86_FEATURE_APIC
))
988 * Note that the LAPIC address is obtained from the MADT (32-bit value)
989 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
992 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE
,
993 acpi_parse_lapic_addr_ovr
, 0);
995 printk(KERN_ERR PREFIX
996 "Error parsing LAPIC address override entry\n");
1000 register_lapic_address(acpi_lapic_addr
);
1005 static int __init
acpi_parse_madt_lapic_entries(void)
1010 struct acpi_subtable_proc madt_proc
[2];
1012 if (!boot_cpu_has(X86_FEATURE_APIC
))
1015 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC
,
1016 acpi_parse_sapic
, MAX_LOCAL_APIC
);
1019 memset(madt_proc
, 0, sizeof(madt_proc
));
1020 madt_proc
[0].id
= ACPI_MADT_TYPE_LOCAL_APIC
;
1021 madt_proc
[0].handler
= acpi_parse_lapic
;
1022 madt_proc
[1].id
= ACPI_MADT_TYPE_LOCAL_X2APIC
;
1023 madt_proc
[1].handler
= acpi_parse_x2apic
;
1024 ret
= acpi_table_parse_entries_array(ACPI_SIG_MADT
,
1025 sizeof(struct acpi_table_madt
),
1026 madt_proc
, ARRAY_SIZE(madt_proc
), MAX_LOCAL_APIC
);
1028 printk(KERN_ERR PREFIX
1029 "Error parsing LAPIC/X2APIC entries\n");
1033 count
= madt_proc
[0].count
;
1034 x2count
= madt_proc
[1].count
;
1036 if (!count
&& !x2count
) {
1037 printk(KERN_ERR PREFIX
"No LAPIC entries present\n");
1038 /* TBD: Cleanup to allow fallback to MPS */
1040 } else if (count
< 0 || x2count
< 0) {
1041 printk(KERN_ERR PREFIX
"Error parsing LAPIC entry\n");
1042 /* TBD: Cleanup to allow fallback to MPS */
1046 x2count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI
,
1047 acpi_parse_x2apic_nmi
, 0);
1048 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI
,
1049 acpi_parse_lapic_nmi
, 0);
1050 if (count
< 0 || x2count
< 0) {
1051 printk(KERN_ERR PREFIX
"Error parsing LAPIC NMI entry\n");
1052 /* TBD: Cleanup to allow fallback to MPS */
1057 #endif /* CONFIG_X86_LOCAL_APIC */
1059 #ifdef CONFIG_X86_IO_APIC
1060 static void __init
mp_config_acpi_legacy_irqs(void)
1063 struct mpc_intsrc mp_irq
;
1067 * Fabricate the legacy ISA bus (bus #31).
1069 mp_bus_id_to_type
[MP_ISA_BUS
] = MP_BUS_ISA
;
1071 set_bit(MP_ISA_BUS
, mp_bus_not_pci
);
1072 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS
);
1075 * Use the default configuration for the IRQs 0-15. Unless
1076 * overridden by (MADT) interrupt source override entries.
1078 for (i
= 0; i
< nr_legacy_irqs(); i
++) {
1080 unsigned int dstapic
;
1084 /* Locate the gsi that irq i maps to. */
1085 if (acpi_isa_irq_to_gsi(i
, &gsi
))
1089 * Locate the IOAPIC that manages the ISA IRQ.
1091 ioapic
= mp_find_ioapic(gsi
);
1094 pin
= mp_find_ioapic_pin(ioapic
, gsi
);
1095 dstapic
= mpc_ioapic_id(ioapic
);
1097 for (idx
= 0; idx
< mp_irq_entries
; idx
++) {
1098 struct mpc_intsrc
*irq
= mp_irqs
+ idx
;
1100 /* Do we already have a mapping for this ISA IRQ? */
1101 if (irq
->srcbus
== MP_ISA_BUS
&& irq
->srcbusirq
== i
)
1104 /* Do we already have a mapping for this IOAPIC pin */
1105 if (irq
->dstapic
== dstapic
&& irq
->dstirq
== pin
)
1109 if (idx
!= mp_irq_entries
) {
1110 printk(KERN_DEBUG
"ACPI: IRQ%d used by override.\n", i
);
1111 continue; /* IRQ already used */
1114 mp_irq
.type
= MP_INTSRC
;
1115 mp_irq
.irqflag
= 0; /* Conforming */
1116 mp_irq
.srcbus
= MP_ISA_BUS
;
1117 mp_irq
.dstapic
= dstapic
;
1118 mp_irq
.irqtype
= mp_INT
;
1119 mp_irq
.srcbusirq
= i
; /* Identity mapped */
1120 mp_irq
.dstirq
= pin
;
1122 mp_save_irq(&mp_irq
);
1127 * Parse IOAPIC related entries in MADT
1128 * returns 0 on success, < 0 on error
1130 static int __init
acpi_parse_madt_ioapic_entries(void)
1135 * ACPI interpreter is required to complete interrupt setup,
1136 * so if it is off, don't enumerate the io-apics with ACPI.
1137 * If MPS is present, it will handle them,
1138 * otherwise the system will stay in PIC mode
1140 if (acpi_disabled
|| acpi_noirq
)
1143 if (!boot_cpu_has(X86_FEATURE_APIC
))
1147 * if "noapic" boot option, don't look for IO-APICs
1149 if (skip_ioapic_setup
) {
1150 printk(KERN_INFO PREFIX
"Skipping IOAPIC probe "
1151 "due to 'noapic' option.\n");
1155 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC
, acpi_parse_ioapic
,
1158 printk(KERN_ERR PREFIX
"No IOAPIC entries present\n");
1160 } else if (count
< 0) {
1161 printk(KERN_ERR PREFIX
"Error parsing IOAPIC entry\n");
1165 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE
,
1166 acpi_parse_int_src_ovr
, nr_irqs
);
1168 printk(KERN_ERR PREFIX
1169 "Error parsing interrupt source overrides entry\n");
1170 /* TBD: Cleanup to allow fallback to MPS */
1175 * If BIOS did not supply an INT_SRC_OVR for the SCI
1176 * pretend we got one so we can set the SCI flags.
1178 if (!acpi_sci_override_gsi
)
1179 acpi_sci_ioapic_setup(acpi_gbl_FADT
.sci_interrupt
, 0, 0,
1180 acpi_gbl_FADT
.sci_interrupt
);
1182 /* Fill in identity legacy mappings where no override */
1183 mp_config_acpi_legacy_irqs();
1185 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE
,
1186 acpi_parse_nmi_src
, nr_irqs
);
1188 printk(KERN_ERR PREFIX
"Error parsing NMI SRC entry\n");
1189 /* TBD: Cleanup to allow fallback to MPS */
1196 static inline int acpi_parse_madt_ioapic_entries(void)
1200 #endif /* !CONFIG_X86_IO_APIC */
1202 static void __init
early_acpi_process_madt(void)
1204 #ifdef CONFIG_X86_LOCAL_APIC
1207 if (!acpi_table_parse(ACPI_SIG_MADT
, acpi_parse_madt
)) {
1210 * Parse MADT LAPIC entries
1212 error
= early_acpi_parse_madt_lapic_addr_ovr();
1215 smp_found_config
= 1;
1217 if (error
== -EINVAL
) {
1219 * Dell Precision Workstation 410, 610 come here.
1221 printk(KERN_ERR PREFIX
1222 "Invalid BIOS MADT, disabling ACPI\n");
1229 static void __init
acpi_process_madt(void)
1231 #ifdef CONFIG_X86_LOCAL_APIC
1234 if (!acpi_table_parse(ACPI_SIG_MADT
, acpi_parse_madt
)) {
1237 * Parse MADT LAPIC entries
1239 error
= acpi_parse_madt_lapic_entries();
1244 * Parse MADT IO-APIC entries
1246 mutex_lock(&acpi_ioapic_lock
);
1247 error
= acpi_parse_madt_ioapic_entries();
1248 mutex_unlock(&acpi_ioapic_lock
);
1250 acpi_set_irq_model_ioapic();
1252 smp_found_config
= 1;
1255 if (error
== -EINVAL
) {
1257 * Dell Precision Workstation 410, 610 come here.
1259 printk(KERN_ERR PREFIX
1260 "Invalid BIOS MADT, disabling ACPI\n");
1265 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1266 * In the event an MPS table was found, forget it.
1267 * Boot with "acpi=off" to use MPS on such a system.
1269 if (smp_found_config
) {
1270 printk(KERN_WARNING PREFIX
1271 "No APIC-table, disabling MPS\n");
1272 smp_found_config
= 0;
1277 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1278 * processors, where MPS only supports physical.
1280 if (acpi_lapic
&& acpi_ioapic
)
1281 printk(KERN_INFO
"Using ACPI (MADT) for SMP configuration "
1283 else if (acpi_lapic
)
1284 printk(KERN_INFO
"Using ACPI for processor (LAPIC) "
1285 "configuration information\n");
1290 static int __init
disable_acpi_irq(const struct dmi_system_id
*d
)
1293 printk(KERN_NOTICE
"%s detected: force use of acpi=noirq\n",
1300 static int __init
disable_acpi_pci(const struct dmi_system_id
*d
)
1303 printk(KERN_NOTICE
"%s detected: force use of pci=noacpi\n",
1310 static int __init
dmi_disable_acpi(const struct dmi_system_id
*d
)
1313 printk(KERN_NOTICE
"%s detected: acpi off\n", d
->ident
);
1317 "Warning: DMI blacklist says broken, but acpi forced\n");
1323 * Force ignoring BIOS IRQ0 override
1325 static int __init
dmi_ignore_irq0_timer_override(const struct dmi_system_id
*d
)
1327 if (!acpi_skip_timer_override
) {
1328 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1330 acpi_skip_timer_override
= 1;
1336 * ACPI offers an alternative platform interface model that removes
1337 * ACPI hardware requirements for platforms that do not implement
1338 * the PC Architecture.
1340 * We initialize the Hardware-reduced ACPI model here:
1342 static void __init
acpi_reduced_hw_init(void)
1344 if (acpi_gbl_reduced_hardware
) {
1346 * Override x86_init functions and bypass legacy pic
1347 * in Hardware-reduced ACPI mode
1349 x86_init
.timers
.timer_init
= x86_init_noop
;
1350 x86_init
.irqs
.pre_vector_init
= x86_init_noop
;
1351 legacy_pic
= &null_legacy_pic
;
1356 * If your system is blacklisted here, but you find that acpi=force
1357 * works for you, please contact linux-acpi@vger.kernel.org
1359 static struct dmi_system_id __initdata acpi_dmi_table
[] = {
1361 * Boxes that need ACPI disabled
1364 .callback
= dmi_disable_acpi
,
1365 .ident
= "IBM Thinkpad",
1367 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1368 DMI_MATCH(DMI_BOARD_NAME
, "2629H1G"),
1373 * Boxes that need ACPI PCI IRQ routing disabled
1376 .callback
= disable_acpi_irq
,
1377 .ident
= "ASUS A7V",
1379 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC"),
1380 DMI_MATCH(DMI_BOARD_NAME
, "<A7V>"),
1381 /* newer BIOS, Revision 1011, does work */
1382 DMI_MATCH(DMI_BIOS_VERSION
,
1383 "ASUS A7V ACPI BIOS Revision 1007"),
1388 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1389 * for LPC bridge, which is needed for the PCI
1390 * interrupt links to work. DSDT fix is in bug 5966.
1391 * 2645, 2646 model numbers are shared with 600/600E/600X
1393 .callback
= disable_acpi_irq
,
1394 .ident
= "IBM Thinkpad 600 Series 2645",
1396 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1397 DMI_MATCH(DMI_BOARD_NAME
, "2645"),
1401 .callback
= disable_acpi_irq
,
1402 .ident
= "IBM Thinkpad 600 Series 2646",
1404 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1405 DMI_MATCH(DMI_BOARD_NAME
, "2646"),
1409 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1412 .callback
= disable_acpi_pci
,
1413 .ident
= "ASUS PR-DLS",
1415 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1416 DMI_MATCH(DMI_BOARD_NAME
, "PR-DLS"),
1417 DMI_MATCH(DMI_BIOS_VERSION
,
1418 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1419 DMI_MATCH(DMI_BIOS_DATE
, "03/21/2003")
1423 .callback
= disable_acpi_pci
,
1424 .ident
= "Acer TravelMate 36x Laptop",
1426 DMI_MATCH(DMI_SYS_VENDOR
, "Acer"),
1427 DMI_MATCH(DMI_PRODUCT_NAME
, "TravelMate 360"),
1433 /* second table for DMI checks that should run after early-quirks */
1434 static struct dmi_system_id __initdata acpi_dmi_table_late
[] = {
1436 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1437 * which includes some code which overrides all temperature
1438 * trip points to 16C if the INTIN2 input of the I/O APIC
1439 * is enabled. This input is incorrectly designated the
1440 * ISA IRQ 0 via an interrupt source override even though
1441 * it is wired to the output of the master 8259A and INTIN0
1442 * is not connected at all. Force ignoring BIOS IRQ0
1443 * override in that cases.
1446 .callback
= dmi_ignore_irq0_timer_override
,
1447 .ident
= "HP nx6115 laptop",
1449 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1450 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq nx6115"),
1454 .callback
= dmi_ignore_irq0_timer_override
,
1455 .ident
= "HP NX6125 laptop",
1457 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1458 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq nx6125"),
1462 .callback
= dmi_ignore_irq0_timer_override
,
1463 .ident
= "HP NX6325 laptop",
1465 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1466 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq nx6325"),
1470 .callback
= dmi_ignore_irq0_timer_override
,
1471 .ident
= "HP 6715b laptop",
1473 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1474 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq 6715b"),
1478 .callback
= dmi_ignore_irq0_timer_override
,
1479 .ident
= "FUJITSU SIEMENS",
1481 DMI_MATCH(DMI_SYS_VENDOR
, "FUJITSU SIEMENS"),
1482 DMI_MATCH(DMI_PRODUCT_NAME
, "AMILO PRO V2030"),
1489 * acpi_boot_table_init() and acpi_boot_init()
1490 * called from setup_arch(), always.
1491 * 1. checksums all tables
1492 * 2. enumerates lapics
1493 * 3. enumerates io-apics
1495 * acpi_table_init() is separate to allow reading SRAT without
1496 * other side effects.
1498 * side effects of acpi_boot_init:
1499 * acpi_lapic = 1 if LAPIC found
1500 * acpi_ioapic = 1 if IOAPIC found
1501 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1502 * if acpi_blacklisted() acpi_disabled = 1;
1503 * acpi_irq_model=...
1507 void __init
acpi_boot_table_init(void)
1509 dmi_check_system(acpi_dmi_table
);
1512 * If acpi_disabled, bail out
1518 * Initialize the ACPI boot-time table parser.
1520 if (acpi_table_init()) {
1525 acpi_table_parse(ACPI_SIG_BOOT
, acpi_parse_sbf
);
1528 * blacklist may disable ACPI entirely
1530 if (acpi_blacklisted()) {
1532 printk(KERN_WARNING PREFIX
"acpi=force override\n");
1534 printk(KERN_WARNING PREFIX
"Disabling ACPI support\n");
1541 int __init
early_acpi_boot_init(void)
1544 * If acpi_disabled, bail out
1550 * Process the Multiple APIC Description Table (MADT), if present
1552 early_acpi_process_madt();
1555 * Hardware-reduced ACPI mode initialization:
1557 acpi_reduced_hw_init();
1562 static int __init
acpi_parse_bgrt(struct acpi_table_header
*table
)
1564 efi_bgrt_init(table
);
1568 int __init
acpi_boot_init(void)
1570 /* those are executed after early-quirks are executed */
1571 dmi_check_system(acpi_dmi_table_late
);
1574 * If acpi_disabled, bail out
1579 acpi_table_parse(ACPI_SIG_BOOT
, acpi_parse_sbf
);
1582 * set sci_int and PM timer address
1584 acpi_table_parse(ACPI_SIG_FADT
, acpi_parse_fadt
);
1587 * Process the Multiple APIC Description Table (MADT), if present
1589 acpi_process_madt();
1591 acpi_table_parse(ACPI_SIG_HPET
, acpi_parse_hpet
);
1592 if (IS_ENABLED(CONFIG_ACPI_BGRT
))
1593 acpi_table_parse(ACPI_SIG_BGRT
, acpi_parse_bgrt
);
1596 x86_init
.pci
.init
= pci_acpi_init
;
1601 static int __init
parse_acpi(char *arg
)
1606 /* "acpi=off" disables both ACPI table parsing and interpreter */
1607 if (strcmp(arg
, "off") == 0) {
1610 /* acpi=force to over-ride black-list */
1611 else if (strcmp(arg
, "force") == 0) {
1615 /* acpi=strict disables out-of-spec workarounds */
1616 else if (strcmp(arg
, "strict") == 0) {
1619 /* acpi=rsdt use RSDT instead of XSDT */
1620 else if (strcmp(arg
, "rsdt") == 0) {
1621 acpi_gbl_do_not_use_xsdt
= TRUE
;
1623 /* "acpi=noirq" disables ACPI interrupt routing */
1624 else if (strcmp(arg
, "noirq") == 0) {
1627 /* "acpi=copy_dsdt" copys DSDT */
1628 else if (strcmp(arg
, "copy_dsdt") == 0) {
1629 acpi_gbl_copy_dsdt_locally
= 1;
1631 /* "acpi=nocmcff" disables FF mode for corrected errors */
1632 else if (strcmp(arg
, "nocmcff") == 0) {
1633 acpi_disable_cmcff
= 1;
1635 /* Core will printk when we return error. */
1640 early_param("acpi", parse_acpi
);
1642 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1643 static int __init
parse_pci(char *arg
)
1645 if (arg
&& strcmp(arg
, "noacpi") == 0)
1649 early_param("pci", parse_pci
);
1651 int __init
acpi_mps_check(void)
1653 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1654 /* mptable code is not built-in*/
1655 if (acpi_disabled
|| acpi_noirq
) {
1656 printk(KERN_WARNING
"MPS support code is not built-in.\n"
1657 "Using acpi=off or acpi=noirq or pci=noacpi "
1658 "may have problem\n");
1665 #ifdef CONFIG_X86_IO_APIC
1666 static int __init
parse_acpi_skip_timer_override(char *arg
)
1668 acpi_skip_timer_override
= 1;
1671 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override
);
1673 static int __init
parse_acpi_use_timer_override(char *arg
)
1675 acpi_use_timer_override
= 1;
1678 early_param("acpi_use_timer_override", parse_acpi_use_timer_override
);
1679 #endif /* CONFIG_X86_IO_APIC */
1681 static int __init
setup_acpi_sci(char *s
)
1685 if (!strcmp(s
, "edge"))
1686 acpi_sci_flags
= ACPI_MADT_TRIGGER_EDGE
|
1687 (acpi_sci_flags
& ~ACPI_MADT_TRIGGER_MASK
);
1688 else if (!strcmp(s
, "level"))
1689 acpi_sci_flags
= ACPI_MADT_TRIGGER_LEVEL
|
1690 (acpi_sci_flags
& ~ACPI_MADT_TRIGGER_MASK
);
1691 else if (!strcmp(s
, "high"))
1692 acpi_sci_flags
= ACPI_MADT_POLARITY_ACTIVE_HIGH
|
1693 (acpi_sci_flags
& ~ACPI_MADT_POLARITY_MASK
);
1694 else if (!strcmp(s
, "low"))
1695 acpi_sci_flags
= ACPI_MADT_POLARITY_ACTIVE_LOW
|
1696 (acpi_sci_flags
& ~ACPI_MADT_POLARITY_MASK
);
1701 early_param("acpi_sci", setup_acpi_sci
);
1703 int __acpi_acquire_global_lock(unsigned int *lock
)
1705 unsigned int old
, new, val
;
1708 new = (((old
& ~0x3) + 2) + ((old
>> 1) & 0x1));
1709 val
= cmpxchg(lock
, old
, new);
1710 } while (unlikely (val
!= old
));
1711 return (new < 3) ? -1 : 0;
1714 int __acpi_release_global_lock(unsigned int *lock
)
1716 unsigned int old
, new, val
;
1720 val
= cmpxchg(lock
, old
, new);
1721 } while (unlikely (val
!= old
));
1725 void __init
arch_reserve_mem_area(acpi_physical_address addr
, size_t size
)
1727 e820_add_region(addr
, size
, E820_ACPI
);