2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
26 #include <linux/init.h>
27 #include <linux/acpi.h>
28 #include <linux/acpi_pmtmr.h>
29 #include <linux/efi.h>
30 #include <linux/cpumask.h>
31 #include <linux/module.h>
32 #include <linux/dmi.h>
33 #include <linux/irq.h>
34 #include <linux/slab.h>
35 #include <linux/bootmem.h>
36 #include <linux/ioport.h>
37 #include <linux/pci.h>
39 #include <asm/pci_x86.h>
40 #include <asm/pgtable.h>
41 #include <asm/io_apic.h>
44 #include <asm/mpspec.h>
47 static int __initdata acpi_force
= 0;
50 EXPORT_SYMBOL(acpi_disabled
);
53 # include <asm/proto.h>
56 #define BAD_MADT_ENTRY(entry, end) ( \
57 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
58 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
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
);
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 #ifndef __HAVE_ARCH_CMPXCHG
81 #warning ACPI uses CMPXCHG, i486 and later hardware
84 /* --------------------------------------------------------------------------
85 Boot-time Configuration
86 -------------------------------------------------------------------------- */
89 * The default interrupt routing model is PIC (8259). This gets
90 * overridden if IOAPICs are enumerated (below).
92 enum acpi_irq_model_id acpi_irq_model
= ACPI_IRQ_MODEL_PIC
;
96 * ISA irqs by default are the first 16 gsis but can be
97 * any gsi as specified by an interrupt source override.
99 static u32 isa_irq_to_gsi
[NR_IRQS_LEGACY
] __read_mostly
= {
100 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
103 static unsigned int gsi_to_irq(unsigned int gsi
)
105 unsigned int irq
= gsi
+ NR_IRQS_LEGACY
;
108 for (i
= 0; i
< NR_IRQS_LEGACY
; i
++) {
109 if (isa_irq_to_gsi
[i
] == gsi
) {
114 /* Provide an identity mapping of gsi == irq
115 * except on truly weird platforms that have
116 * non isa irqs in the first 16 gsis.
118 if (gsi
>= NR_IRQS_LEGACY
)
126 static u32
irq_to_gsi(int irq
)
130 if (irq
< NR_IRQS_LEGACY
)
131 gsi
= isa_irq_to_gsi
[irq
];
132 else if (irq
< gsi_top
)
134 else if (irq
< (gsi_top
+ NR_IRQS_LEGACY
))
143 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
144 * to map the target physical address. The problem is that set_fixmap()
145 * provides a single page, and it is possible that the page is not
147 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
148 * i.e. until the next __va_range() call.
150 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
151 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
152 * count idx down while incrementing the phys address.
154 char *__init
__acpi_map_table(unsigned long phys
, unsigned long size
)
160 return early_ioremap(phys
, size
);
162 void __init
__acpi_unmap_table(char *map
, unsigned long size
)
167 early_iounmap(map
, size
);
170 #ifdef CONFIG_X86_LOCAL_APIC
171 static int __init
acpi_parse_madt(struct acpi_table_header
*table
)
173 struct acpi_table_madt
*madt
= NULL
;
178 madt
= (struct acpi_table_madt
*)table
;
180 printk(KERN_WARNING PREFIX
"Unable to map MADT\n");
185 acpi_lapic_addr
= (u64
) madt
->address
;
187 printk(KERN_DEBUG PREFIX
"Local APIC address 0x%08x\n",
191 default_acpi_madt_oem_check(madt
->header
.oem_id
,
192 madt
->header
.oem_table_id
);
197 static void __cpuinit
acpi_register_lapic(int id
, u8 enabled
)
199 unsigned int ver
= 0;
201 if (id
>= (MAX_LOCAL_APIC
-1)) {
202 printk(KERN_INFO PREFIX
"skipped apicid that is too big\n");
211 if (boot_cpu_physical_apicid
!= -1U)
212 ver
= apic_version
[boot_cpu_physical_apicid
];
214 generic_processor_info(id
, ver
);
218 acpi_parse_x2apic(struct acpi_subtable_header
*header
, const unsigned long end
)
220 struct acpi_madt_local_x2apic
*processor
= NULL
;
224 processor
= (struct acpi_madt_local_x2apic
*)header
;
226 if (BAD_MADT_ENTRY(processor
, end
))
229 acpi_table_print_madt_entry(header
);
231 apic_id
= processor
->local_apic_id
;
232 enabled
= processor
->lapic_flags
& ACPI_MADT_ENABLED
;
233 #ifdef CONFIG_X86_X2APIC
235 * We need to register disabled CPU as well to permit
236 * counting disabled CPUs. This allows us to size
237 * cpus_possible_map more accurately, to permit
238 * to not preallocating memory for all NR_CPUS
239 * when we use CPU hotplug.
241 if (!apic
->apic_id_valid(apic_id
) && enabled
)
242 printk(KERN_WARNING PREFIX
"x2apic entry ignored\n");
244 acpi_register_lapic(apic_id
, enabled
);
246 printk(KERN_WARNING PREFIX
"x2apic entry ignored\n");
253 acpi_parse_lapic(struct acpi_subtable_header
* header
, const unsigned long end
)
255 struct acpi_madt_local_apic
*processor
= NULL
;
257 processor
= (struct acpi_madt_local_apic
*)header
;
259 if (BAD_MADT_ENTRY(processor
, end
))
262 acpi_table_print_madt_entry(header
);
265 * We need to register disabled CPU as well to permit
266 * counting disabled CPUs. This allows us to size
267 * cpus_possible_map more accurately, to permit
268 * to not preallocating memory for all NR_CPUS
269 * when we use CPU hotplug.
271 acpi_register_lapic(processor
->id
, /* APIC ID */
272 processor
->lapic_flags
& ACPI_MADT_ENABLED
);
278 acpi_parse_sapic(struct acpi_subtable_header
*header
, const unsigned long end
)
280 struct acpi_madt_local_sapic
*processor
= NULL
;
282 processor
= (struct acpi_madt_local_sapic
*)header
;
284 if (BAD_MADT_ENTRY(processor
, end
))
287 acpi_table_print_madt_entry(header
);
289 acpi_register_lapic((processor
->id
<< 8) | processor
->eid
,/* APIC ID */
290 processor
->lapic_flags
& ACPI_MADT_ENABLED
);
296 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header
* header
,
297 const unsigned long end
)
299 struct acpi_madt_local_apic_override
*lapic_addr_ovr
= NULL
;
301 lapic_addr_ovr
= (struct acpi_madt_local_apic_override
*)header
;
303 if (BAD_MADT_ENTRY(lapic_addr_ovr
, end
))
306 acpi_lapic_addr
= lapic_addr_ovr
->address
;
312 acpi_parse_x2apic_nmi(struct acpi_subtable_header
*header
,
313 const unsigned long end
)
315 struct acpi_madt_local_x2apic_nmi
*x2apic_nmi
= NULL
;
317 x2apic_nmi
= (struct acpi_madt_local_x2apic_nmi
*)header
;
319 if (BAD_MADT_ENTRY(x2apic_nmi
, end
))
322 acpi_table_print_madt_entry(header
);
324 if (x2apic_nmi
->lint
!= 1)
325 printk(KERN_WARNING PREFIX
"NMI not connected to LINT 1!\n");
331 acpi_parse_lapic_nmi(struct acpi_subtable_header
* header
, const unsigned long end
)
333 struct acpi_madt_local_apic_nmi
*lapic_nmi
= NULL
;
335 lapic_nmi
= (struct acpi_madt_local_apic_nmi
*)header
;
337 if (BAD_MADT_ENTRY(lapic_nmi
, end
))
340 acpi_table_print_madt_entry(header
);
342 if (lapic_nmi
->lint
!= 1)
343 printk(KERN_WARNING PREFIX
"NMI not connected to LINT 1!\n");
348 #endif /*CONFIG_X86_LOCAL_APIC */
350 #ifdef CONFIG_X86_IO_APIC
353 acpi_parse_ioapic(struct acpi_subtable_header
* header
, const unsigned long end
)
355 struct acpi_madt_io_apic
*ioapic
= NULL
;
357 ioapic
= (struct acpi_madt_io_apic
*)header
;
359 if (BAD_MADT_ENTRY(ioapic
, end
))
362 acpi_table_print_madt_entry(header
);
364 mp_register_ioapic(ioapic
->id
,
365 ioapic
->address
, ioapic
->global_irq_base
);
371 * Parse Interrupt Source Override for the ACPI SCI
373 static void __init
acpi_sci_ioapic_setup(u8 bus_irq
, u16 polarity
, u16 trigger
, u32 gsi
)
375 if (trigger
== 0) /* compatible SCI trigger is level */
378 if (polarity
== 0) /* compatible SCI polarity is low */
381 /* Command-line over-ride via acpi_sci= */
382 if (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
)
383 trigger
= (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2;
385 if (acpi_sci_flags
& ACPI_MADT_POLARITY_MASK
)
386 polarity
= acpi_sci_flags
& ACPI_MADT_POLARITY_MASK
;
389 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
390 * If GSI is < 16, this will update its flags,
391 * else it will create a new mp_irqs[] entry.
393 mp_override_legacy_irq(bus_irq
, polarity
, trigger
, gsi
);
396 * stash over-ride to indicate we've been here
397 * and for later update of acpi_gbl_FADT
399 acpi_sci_override_gsi
= gsi
;
404 acpi_parse_int_src_ovr(struct acpi_subtable_header
* header
,
405 const unsigned long end
)
407 struct acpi_madt_interrupt_override
*intsrc
= NULL
;
409 intsrc
= (struct acpi_madt_interrupt_override
*)header
;
411 if (BAD_MADT_ENTRY(intsrc
, end
))
414 acpi_table_print_madt_entry(header
);
416 if (intsrc
->source_irq
== acpi_gbl_FADT
.sci_interrupt
) {
417 acpi_sci_ioapic_setup(intsrc
->source_irq
,
418 intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
,
419 (intsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2,
424 if (intsrc
->source_irq
== 0) {
425 if (acpi_skip_timer_override
) {
426 printk(PREFIX
"BIOS IRQ0 override ignored.\n");
430 if ((intsrc
->global_irq
== 2) && acpi_fix_pin2_polarity
431 && (intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
)) {
432 intsrc
->inti_flags
&= ~ACPI_MADT_POLARITY_MASK
;
433 printk(PREFIX
"BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
437 mp_override_legacy_irq(intsrc
->source_irq
,
438 intsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
,
439 (intsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2,
446 acpi_parse_nmi_src(struct acpi_subtable_header
* header
, const unsigned long end
)
448 struct acpi_madt_nmi_source
*nmi_src
= NULL
;
450 nmi_src
= (struct acpi_madt_nmi_source
*)header
;
452 if (BAD_MADT_ENTRY(nmi_src
, end
))
455 acpi_table_print_madt_entry(header
);
457 /* TBD: Support nimsrc entries? */
462 #endif /* CONFIG_X86_IO_APIC */
465 * acpi_pic_sci_set_trigger()
467 * use ELCR to set PIC-mode trigger type for SCI
469 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
470 * it may require Edge Trigger -- use "acpi_sci=edge"
472 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
473 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
474 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
475 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
478 void __init
acpi_pic_sci_set_trigger(unsigned int irq
, u16 trigger
)
480 unsigned int mask
= 1 << irq
;
481 unsigned int old
, new;
483 /* Real old ELCR mask */
484 old
= inb(0x4d0) | (inb(0x4d1) << 8);
487 * If we use ACPI to set PCI IRQs, then we should clear ELCR
488 * since we will set it correctly as we enable the PCI irq
491 new = acpi_noirq
? old
: 0;
494 * Update SCI information in the ELCR, it isn't in the PCI
498 case 1: /* Edge - clear */
501 case 3: /* Level - set */
509 printk(PREFIX
"setting ELCR to %04x (from %04x)\n", new, old
);
511 outb(new >> 8, 0x4d1);
514 int acpi_gsi_to_irq(u32 gsi
, unsigned int *irq
)
516 *irq
= gsi_to_irq(gsi
);
518 #ifdef CONFIG_X86_IO_APIC
519 if (acpi_irq_model
== ACPI_IRQ_MODEL_IOAPIC
)
520 setup_IO_APIC_irq_extra(gsi
);
525 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq
);
527 int acpi_isa_irq_to_gsi(unsigned isa_irq
, u32
*gsi
)
531 *gsi
= irq_to_gsi(isa_irq
);
535 static int acpi_register_gsi_pic(struct device
*dev
, u32 gsi
,
536 int trigger
, int polarity
)
540 * Make sure all (legacy) PCI IRQs are set as level-triggered.
542 if (trigger
== ACPI_LEVEL_SENSITIVE
)
543 eisa_set_level_irq(gsi
);
549 static int acpi_register_gsi_ioapic(struct device
*dev
, u32 gsi
,
550 int trigger
, int polarity
)
552 #ifdef CONFIG_X86_IO_APIC
553 gsi
= mp_register_gsi(dev
, gsi
, trigger
, polarity
);
559 int (*__acpi_register_gsi
)(struct device
*dev
, u32 gsi
,
560 int trigger
, int polarity
) = acpi_register_gsi_pic
;
563 * success: return IRQ number (>=0)
564 * failure: return < 0
566 int acpi_register_gsi(struct device
*dev
, u32 gsi
, int trigger
, int polarity
)
569 unsigned int plat_gsi
= gsi
;
571 plat_gsi
= (*__acpi_register_gsi
)(dev
, gsi
, trigger
, polarity
);
572 irq
= gsi_to_irq(plat_gsi
);
576 EXPORT_SYMBOL_GPL(acpi_register_gsi
);
578 void acpi_unregister_gsi(u32 gsi
)
581 EXPORT_SYMBOL_GPL(acpi_unregister_gsi
);
583 void __init
acpi_set_irq_model_pic(void)
585 acpi_irq_model
= ACPI_IRQ_MODEL_PIC
;
586 __acpi_register_gsi
= acpi_register_gsi_pic
;
590 void __init
acpi_set_irq_model_ioapic(void)
592 acpi_irq_model
= ACPI_IRQ_MODEL_IOAPIC
;
593 __acpi_register_gsi
= acpi_register_gsi_ioapic
;
598 * ACPI based hotplug support for CPU
600 #ifdef CONFIG_ACPI_HOTPLUG_CPU
601 #include <acpi/processor.h>
603 static void __cpuinit
acpi_map_cpu2node(acpi_handle handle
, int cpu
, int physid
)
605 #ifdef CONFIG_ACPI_NUMA
608 nid
= acpi_get_node(handle
);
609 if (nid
== -1 || !node_online(nid
))
611 set_apicid_to_node(physid
, nid
);
612 numa_set_node(cpu
, nid
);
616 static int __cpuinit
_acpi_map_lsapic(acpi_handle handle
, int *pcpu
)
618 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
619 union acpi_object
*obj
;
620 struct acpi_madt_local_apic
*lapic
;
621 cpumask_var_t tmp_map
, new_map
;
624 int retval
= -ENOMEM
;
626 if (ACPI_FAILURE(acpi_evaluate_object(handle
, "_MAT", NULL
, &buffer
)))
629 if (!buffer
.length
|| !buffer
.pointer
)
632 obj
= buffer
.pointer
;
633 if (obj
->type
!= ACPI_TYPE_BUFFER
||
634 obj
->buffer
.length
< sizeof(*lapic
)) {
635 kfree(buffer
.pointer
);
639 lapic
= (struct acpi_madt_local_apic
*)obj
->buffer
.pointer
;
641 if (lapic
->header
.type
!= ACPI_MADT_TYPE_LOCAL_APIC
||
642 !(lapic
->lapic_flags
& ACPI_MADT_ENABLED
)) {
643 kfree(buffer
.pointer
);
649 kfree(buffer
.pointer
);
650 buffer
.length
= ACPI_ALLOCATE_BUFFER
;
651 buffer
.pointer
= NULL
;
654 if (!alloc_cpumask_var(&tmp_map
, GFP_KERNEL
))
657 if (!alloc_cpumask_var(&new_map
, GFP_KERNEL
))
660 cpumask_copy(tmp_map
, cpu_present_mask
);
661 acpi_register_lapic(physid
, ACPI_MADT_ENABLED
);
664 * If acpi_register_lapic successfully generates a new logical cpu
665 * number, then the following will get us exactly what was mapped
667 cpumask_andnot(new_map
, cpu_present_mask
, tmp_map
);
668 if (cpumask_empty(new_map
)) {
669 printk ("Unable to map lapic to logical cpu number\n");
674 acpi_processor_set_pdc(handle
);
676 cpu
= cpumask_first(new_map
);
677 acpi_map_cpu2node(handle
, cpu
, physid
);
683 free_cpumask_var(new_map
);
685 free_cpumask_var(tmp_map
);
690 /* wrapper to silence section mismatch warning */
691 int __ref
acpi_map_lsapic(acpi_handle handle
, int *pcpu
)
693 return _acpi_map_lsapic(handle
, pcpu
);
695 EXPORT_SYMBOL(acpi_map_lsapic
);
697 int acpi_unmap_lsapic(int cpu
)
699 #ifdef CONFIG_ACPI_NUMA
700 set_apicid_to_node(per_cpu(x86_cpu_to_apicid
, cpu
), NUMA_NO_NODE
);
703 per_cpu(x86_cpu_to_apicid
, cpu
) = -1;
704 set_cpu_present(cpu
, false);
710 EXPORT_SYMBOL(acpi_unmap_lsapic
);
711 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
713 int acpi_register_ioapic(acpi_handle handle
, u64 phys_addr
, u32 gsi_base
)
719 EXPORT_SYMBOL(acpi_register_ioapic
);
721 int acpi_unregister_ioapic(acpi_handle handle
, u32 gsi_base
)
727 EXPORT_SYMBOL(acpi_unregister_ioapic
);
729 static int __init
acpi_parse_sbf(struct acpi_table_header
*table
)
731 struct acpi_table_boot
*sb
;
733 sb
= (struct acpi_table_boot
*)table
;
735 printk(KERN_WARNING PREFIX
"Unable to map SBF\n");
739 sbf_port
= sb
->cmos_index
; /* Save CMOS port */
744 #ifdef CONFIG_HPET_TIMER
745 #include <asm/hpet.h>
747 static struct __initdata resource
*hpet_res
;
749 static int __init
acpi_parse_hpet(struct acpi_table_header
*table
)
751 struct acpi_table_hpet
*hpet_tbl
;
753 hpet_tbl
= (struct acpi_table_hpet
*)table
;
755 printk(KERN_WARNING PREFIX
"Unable to map HPET\n");
759 if (hpet_tbl
->address
.space_id
!= ACPI_SPACE_MEM
) {
760 printk(KERN_WARNING PREFIX
"HPET timers must be located in "
765 hpet_address
= hpet_tbl
->address
.address
;
766 hpet_blockid
= hpet_tbl
->sequence
;
769 * Some broken BIOSes advertise HPET at 0x0. We really do not
770 * want to allocate a resource there.
773 printk(KERN_WARNING PREFIX
774 "HPET id: %#x base: %#lx is invalid\n",
775 hpet_tbl
->id
, hpet_address
);
780 * Some even more broken BIOSes advertise HPET at
781 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
784 if (hpet_address
== 0xfed0000000000000UL
) {
785 if (!hpet_force_user
) {
786 printk(KERN_WARNING PREFIX
"HPET id: %#x "
787 "base: 0xfed0000000000000 is bogus\n "
788 "try hpet=force on the kernel command line to "
789 "fix it up to 0xfed00000.\n", hpet_tbl
->id
);
793 printk(KERN_WARNING PREFIX
794 "HPET id: %#x base: 0xfed0000000000000 fixed up "
795 "to 0xfed00000.\n", hpet_tbl
->id
);
799 printk(KERN_INFO PREFIX
"HPET id: %#x base: %#lx\n",
800 hpet_tbl
->id
, hpet_address
);
803 * Allocate and initialize the HPET firmware resource for adding into
804 * the resource tree during the lateinit timeframe.
806 #define HPET_RESOURCE_NAME_SIZE 9
807 hpet_res
= alloc_bootmem(sizeof(*hpet_res
) + HPET_RESOURCE_NAME_SIZE
);
809 hpet_res
->name
= (void *)&hpet_res
[1];
810 hpet_res
->flags
= IORESOURCE_MEM
;
811 snprintf((char *)hpet_res
->name
, HPET_RESOURCE_NAME_SIZE
, "HPET %u",
814 hpet_res
->start
= hpet_address
;
815 hpet_res
->end
= hpet_address
+ (1 * 1024) - 1;
821 * hpet_insert_resource inserts the HPET resources used into the resource
824 static __init
int hpet_insert_resource(void)
829 return insert_resource(&iomem_resource
, hpet_res
);
832 late_initcall(hpet_insert_resource
);
835 #define acpi_parse_hpet NULL
838 static int __init
acpi_parse_fadt(struct acpi_table_header
*table
)
841 #ifdef CONFIG_X86_PM_TIMER
842 /* detect the location of the ACPI PM Timer */
843 if (acpi_gbl_FADT
.header
.revision
>= FADT2_REVISION_ID
) {
845 if (acpi_gbl_FADT
.xpm_timer_block
.space_id
!=
846 ACPI_ADR_SPACE_SYSTEM_IO
)
849 pmtmr_ioport
= acpi_gbl_FADT
.xpm_timer_block
.address
;
851 * "X" fields are optional extensions to the original V1.0
852 * fields, so we must selectively expand V1.0 fields if the
853 * corresponding X field is zero.
856 pmtmr_ioport
= acpi_gbl_FADT
.pm_timer_block
;
859 pmtmr_ioport
= acpi_gbl_FADT
.pm_timer_block
;
862 printk(KERN_INFO PREFIX
"PM-Timer IO Port: %#x\n",
868 #ifdef CONFIG_X86_LOCAL_APIC
870 * Parse LAPIC entries in MADT
871 * returns 0 on success, < 0 on error
874 static int __init
early_acpi_parse_madt_lapic_addr_ovr(void)
882 * Note that the LAPIC address is obtained from the MADT (32-bit value)
883 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
887 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE
,
888 acpi_parse_lapic_addr_ovr
, 0);
890 printk(KERN_ERR PREFIX
891 "Error parsing LAPIC address override entry\n");
895 register_lapic_address(acpi_lapic_addr
);
900 static int __init
acpi_parse_madt_lapic_entries(void)
909 * Note that the LAPIC address is obtained from the MADT (32-bit value)
910 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
914 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE
,
915 acpi_parse_lapic_addr_ovr
, 0);
917 printk(KERN_ERR PREFIX
918 "Error parsing LAPIC address override entry\n");
922 register_lapic_address(acpi_lapic_addr
);
924 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC
,
925 acpi_parse_sapic
, MAX_LOCAL_APIC
);
928 x2count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC
,
929 acpi_parse_x2apic
, MAX_LOCAL_APIC
);
930 count
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC
,
931 acpi_parse_lapic
, MAX_LOCAL_APIC
);
933 if (!count
&& !x2count
) {
934 printk(KERN_ERR PREFIX
"No LAPIC entries present\n");
935 /* TBD: Cleanup to allow fallback to MPS */
937 } else if (count
< 0 || x2count
< 0) {
938 printk(KERN_ERR PREFIX
"Error parsing LAPIC entry\n");
939 /* TBD: Cleanup to allow fallback to MPS */
944 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI
,
945 acpi_parse_x2apic_nmi
, 0);
947 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI
, acpi_parse_lapic_nmi
, 0);
948 if (count
< 0 || x2count
< 0) {
949 printk(KERN_ERR PREFIX
"Error parsing LAPIC NMI entry\n");
950 /* TBD: Cleanup to allow fallback to MPS */
955 #endif /* CONFIG_X86_LOCAL_APIC */
957 #ifdef CONFIG_X86_IO_APIC
960 #ifdef CONFIG_X86_ES7000
961 extern int es7000_plat
;
964 void __init
mp_override_legacy_irq(u8 bus_irq
, u8 polarity
, u8 trigger
, u32 gsi
)
968 struct mpc_intsrc mp_irq
;
971 * Convert 'gsi' to 'ioapic.pin'.
973 ioapic
= mp_find_ioapic(gsi
);
976 pin
= mp_find_ioapic_pin(ioapic
, gsi
);
979 * TBD: This check is for faulty timer entries, where the override
980 * erroneously sets the trigger to level, resulting in a HUGE
981 * increase of timer interrupts!
983 if ((bus_irq
== 0) && (trigger
== 3))
986 mp_irq
.type
= MP_INTSRC
;
987 mp_irq
.irqtype
= mp_INT
;
988 mp_irq
.irqflag
= (trigger
<< 2) | polarity
;
989 mp_irq
.srcbus
= MP_ISA_BUS
;
990 mp_irq
.srcbusirq
= bus_irq
; /* IRQ */
991 mp_irq
.dstapic
= mpc_ioapic_id(ioapic
); /* APIC ID */
992 mp_irq
.dstirq
= pin
; /* INTIN# */
994 mp_save_irq(&mp_irq
);
996 isa_irq_to_gsi
[bus_irq
] = gsi
;
999 void __init
mp_config_acpi_legacy_irqs(void)
1002 struct mpc_intsrc mp_irq
;
1006 * Fabricate the legacy ISA bus (bus #31).
1008 mp_bus_id_to_type
[MP_ISA_BUS
] = MP_BUS_ISA
;
1010 set_bit(MP_ISA_BUS
, mp_bus_not_pci
);
1011 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS
);
1013 #ifdef CONFIG_X86_ES7000
1015 * Older generations of ES7000 have no legacy identity mappings
1017 if (es7000_plat
== 1)
1022 * Use the default configuration for the IRQs 0-15. Unless
1023 * overridden by (MADT) interrupt source override entries.
1025 for (i
= 0; i
< 16; i
++) {
1027 unsigned int dstapic
;
1031 /* Locate the gsi that irq i maps to. */
1032 if (acpi_isa_irq_to_gsi(i
, &gsi
))
1036 * Locate the IOAPIC that manages the ISA IRQ.
1038 ioapic
= mp_find_ioapic(gsi
);
1041 pin
= mp_find_ioapic_pin(ioapic
, gsi
);
1042 dstapic
= mpc_ioapic_id(ioapic
);
1044 for (idx
= 0; idx
< mp_irq_entries
; idx
++) {
1045 struct mpc_intsrc
*irq
= mp_irqs
+ idx
;
1047 /* Do we already have a mapping for this ISA IRQ? */
1048 if (irq
->srcbus
== MP_ISA_BUS
&& irq
->srcbusirq
== i
)
1051 /* Do we already have a mapping for this IOAPIC pin */
1052 if (irq
->dstapic
== dstapic
&& irq
->dstirq
== pin
)
1056 if (idx
!= mp_irq_entries
) {
1057 printk(KERN_DEBUG
"ACPI: IRQ%d used by override.\n", i
);
1058 continue; /* IRQ already used */
1061 mp_irq
.type
= MP_INTSRC
;
1062 mp_irq
.irqflag
= 0; /* Conforming */
1063 mp_irq
.srcbus
= MP_ISA_BUS
;
1064 mp_irq
.dstapic
= dstapic
;
1065 mp_irq
.irqtype
= mp_INT
;
1066 mp_irq
.srcbusirq
= i
; /* Identity mapped */
1067 mp_irq
.dstirq
= pin
;
1069 mp_save_irq(&mp_irq
);
1073 static int mp_config_acpi_gsi(struct device
*dev
, u32 gsi
, int trigger
,
1076 #ifdef CONFIG_X86_MPPARSE
1077 struct mpc_intsrc mp_irq
;
1078 struct pci_dev
*pdev
;
1079 unsigned char number
;
1088 if (dev
->bus
!= &pci_bus_type
)
1091 pdev
= to_pci_dev(dev
);
1092 number
= pdev
->bus
->number
;
1093 devfn
= pdev
->devfn
;
1095 /* print the entry should happen on mptable identically */
1096 mp_irq
.type
= MP_INTSRC
;
1097 mp_irq
.irqtype
= mp_INT
;
1098 mp_irq
.irqflag
= (trigger
== ACPI_EDGE_SENSITIVE
? 4 : 0x0c) |
1099 (polarity
== ACPI_ACTIVE_HIGH
? 1 : 3);
1100 mp_irq
.srcbus
= number
;
1101 mp_irq
.srcbusirq
= (((devfn
>> 3) & 0x1f) << 2) | ((pin
- 1) & 3);
1102 ioapic
= mp_find_ioapic(gsi
);
1103 mp_irq
.dstapic
= mpc_ioapic_id(ioapic
);
1104 mp_irq
.dstirq
= mp_find_ioapic_pin(ioapic
, gsi
);
1106 mp_save_irq(&mp_irq
);
1111 int mp_register_gsi(struct device
*dev
, u32 gsi
, int trigger
, int polarity
)
1115 struct io_apic_irq_attr irq_attr
;
1117 if (acpi_irq_model
!= ACPI_IRQ_MODEL_IOAPIC
)
1120 /* Don't set up the ACPI SCI because it's already set up */
1121 if (acpi_gbl_FADT
.sci_interrupt
== gsi
)
1124 ioapic
= mp_find_ioapic(gsi
);
1126 printk(KERN_WARNING
"No IOAPIC for GSI %u\n", gsi
);
1130 ioapic_pin
= mp_find_ioapic_pin(ioapic
, gsi
);
1132 if (ioapic_pin
> MP_MAX_IOAPIC_PIN
) {
1133 printk(KERN_ERR
"Invalid reference to IOAPIC pin "
1134 "%d-%d\n", mpc_ioapic_id(ioapic
),
1139 if (enable_update_mptable
)
1140 mp_config_acpi_gsi(dev
, gsi
, trigger
, polarity
);
1142 set_io_apic_irq_attr(&irq_attr
, ioapic
, ioapic_pin
,
1143 trigger
== ACPI_EDGE_SENSITIVE
? 0 : 1,
1144 polarity
== ACPI_ACTIVE_HIGH
? 0 : 1);
1145 io_apic_set_pci_routing(dev
, gsi_to_irq(gsi
), &irq_attr
);
1151 * Parse IOAPIC related entries in MADT
1152 * returns 0 on success, < 0 on error
1154 static int __init
acpi_parse_madt_ioapic_entries(void)
1159 * ACPI interpreter is required to complete interrupt setup,
1160 * so if it is off, don't enumerate the io-apics with ACPI.
1161 * If MPS is present, it will handle them,
1162 * otherwise the system will stay in PIC mode
1164 if (acpi_disabled
|| acpi_noirq
)
1171 * if "noapic" boot option, don't look for IO-APICs
1173 if (skip_ioapic_setup
) {
1174 printk(KERN_INFO PREFIX
"Skipping IOAPIC probe "
1175 "due to 'noapic' option.\n");
1180 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC
, acpi_parse_ioapic
,
1183 printk(KERN_ERR PREFIX
"No IOAPIC entries present\n");
1185 } else if (count
< 0) {
1186 printk(KERN_ERR PREFIX
"Error parsing IOAPIC entry\n");
1191 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE
, acpi_parse_int_src_ovr
,
1194 printk(KERN_ERR PREFIX
1195 "Error parsing interrupt source overrides entry\n");
1196 /* TBD: Cleanup to allow fallback to MPS */
1201 * If BIOS did not supply an INT_SRC_OVR for the SCI
1202 * pretend we got one so we can set the SCI flags.
1204 if (!acpi_sci_override_gsi
)
1205 acpi_sci_ioapic_setup(acpi_gbl_FADT
.sci_interrupt
, 0, 0,
1206 acpi_gbl_FADT
.sci_interrupt
);
1208 /* Fill in identity legacy mappings where no override */
1209 mp_config_acpi_legacy_irqs();
1212 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE
, acpi_parse_nmi_src
,
1215 printk(KERN_ERR PREFIX
"Error parsing NMI SRC entry\n");
1216 /* TBD: Cleanup to allow fallback to MPS */
1223 static inline int acpi_parse_madt_ioapic_entries(void)
1227 #endif /* !CONFIG_X86_IO_APIC */
1229 static void __init
early_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
= early_acpi_parse_madt_lapic_addr_ovr();
1242 smp_found_config
= 1;
1244 if (error
== -EINVAL
) {
1246 * Dell Precision Workstation 410, 610 come here.
1248 printk(KERN_ERR PREFIX
1249 "Invalid BIOS MADT, disabling ACPI\n");
1256 static void __init
acpi_process_madt(void)
1258 #ifdef CONFIG_X86_LOCAL_APIC
1261 if (!acpi_table_parse(ACPI_SIG_MADT
, acpi_parse_madt
)) {
1264 * Parse MADT LAPIC entries
1266 error
= acpi_parse_madt_lapic_entries();
1271 * Parse MADT IO-APIC entries
1273 error
= acpi_parse_madt_ioapic_entries();
1275 acpi_set_irq_model_ioapic();
1277 smp_found_config
= 1;
1280 if (error
== -EINVAL
) {
1282 * Dell Precision Workstation 410, 610 come here.
1284 printk(KERN_ERR PREFIX
1285 "Invalid BIOS MADT, disabling ACPI\n");
1290 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1291 * In the event an MPS table was found, forget it.
1292 * Boot with "acpi=off" to use MPS on such a system.
1294 if (smp_found_config
) {
1295 printk(KERN_WARNING PREFIX
1296 "No APIC-table, disabling MPS\n");
1297 smp_found_config
= 0;
1302 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1303 * processors, where MPS only supports physical.
1305 if (acpi_lapic
&& acpi_ioapic
)
1306 printk(KERN_INFO
"Using ACPI (MADT) for SMP configuration "
1308 else if (acpi_lapic
)
1309 printk(KERN_INFO
"Using ACPI for processor (LAPIC) "
1310 "configuration information\n");
1315 static int __init
disable_acpi_irq(const struct dmi_system_id
*d
)
1318 printk(KERN_NOTICE
"%s detected: force use of acpi=noirq\n",
1325 static int __init
disable_acpi_pci(const struct dmi_system_id
*d
)
1328 printk(KERN_NOTICE
"%s detected: force use of pci=noacpi\n",
1335 static int __init
dmi_disable_acpi(const struct dmi_system_id
*d
)
1338 printk(KERN_NOTICE
"%s detected: acpi off\n", d
->ident
);
1342 "Warning: DMI blacklist says broken, but acpi forced\n");
1348 * Force ignoring BIOS IRQ0 override
1350 static int __init
dmi_ignore_irq0_timer_override(const struct dmi_system_id
*d
)
1352 if (!acpi_skip_timer_override
) {
1353 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1355 acpi_skip_timer_override
= 1;
1361 * If your system is blacklisted here, but you find that acpi=force
1362 * works for you, please contact linux-acpi@vger.kernel.org
1364 static struct dmi_system_id __initdata acpi_dmi_table
[] = {
1366 * Boxes that need ACPI disabled
1369 .callback
= dmi_disable_acpi
,
1370 .ident
= "IBM Thinkpad",
1372 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1373 DMI_MATCH(DMI_BOARD_NAME
, "2629H1G"),
1378 * Boxes that need ACPI PCI IRQ routing disabled
1381 .callback
= disable_acpi_irq
,
1382 .ident
= "ASUS A7V",
1384 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC"),
1385 DMI_MATCH(DMI_BOARD_NAME
, "<A7V>"),
1386 /* newer BIOS, Revision 1011, does work */
1387 DMI_MATCH(DMI_BIOS_VERSION
,
1388 "ASUS A7V ACPI BIOS Revision 1007"),
1393 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1394 * for LPC bridge, which is needed for the PCI
1395 * interrupt links to work. DSDT fix is in bug 5966.
1396 * 2645, 2646 model numbers are shared with 600/600E/600X
1398 .callback
= disable_acpi_irq
,
1399 .ident
= "IBM Thinkpad 600 Series 2645",
1401 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1402 DMI_MATCH(DMI_BOARD_NAME
, "2645"),
1406 .callback
= disable_acpi_irq
,
1407 .ident
= "IBM Thinkpad 600 Series 2646",
1409 DMI_MATCH(DMI_BOARD_VENDOR
, "IBM"),
1410 DMI_MATCH(DMI_BOARD_NAME
, "2646"),
1414 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1417 .callback
= disable_acpi_pci
,
1418 .ident
= "ASUS PR-DLS",
1420 DMI_MATCH(DMI_BOARD_VENDOR
, "ASUSTeK Computer INC."),
1421 DMI_MATCH(DMI_BOARD_NAME
, "PR-DLS"),
1422 DMI_MATCH(DMI_BIOS_VERSION
,
1423 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1424 DMI_MATCH(DMI_BIOS_DATE
, "03/21/2003")
1428 .callback
= disable_acpi_pci
,
1429 .ident
= "Acer TravelMate 36x Laptop",
1431 DMI_MATCH(DMI_SYS_VENDOR
, "Acer"),
1432 DMI_MATCH(DMI_PRODUCT_NAME
, "TravelMate 360"),
1438 /* second table for DMI checks that should run after early-quirks */
1439 static struct dmi_system_id __initdata acpi_dmi_table_late
[] = {
1441 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1442 * which includes some code which overrides all temperature
1443 * trip points to 16C if the INTIN2 input of the I/O APIC
1444 * is enabled. This input is incorrectly designated the
1445 * ISA IRQ 0 via an interrupt source override even though
1446 * it is wired to the output of the master 8259A and INTIN0
1447 * is not connected at all. Force ignoring BIOS IRQ0
1448 * override in that cases.
1451 .callback
= dmi_ignore_irq0_timer_override
,
1452 .ident
= "HP nx6115 laptop",
1454 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1455 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq nx6115"),
1459 .callback
= dmi_ignore_irq0_timer_override
,
1460 .ident
= "HP NX6125 laptop",
1462 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1463 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq nx6125"),
1467 .callback
= dmi_ignore_irq0_timer_override
,
1468 .ident
= "HP NX6325 laptop",
1470 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1471 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq nx6325"),
1475 .callback
= dmi_ignore_irq0_timer_override
,
1476 .ident
= "HP 6715b laptop",
1478 DMI_MATCH(DMI_SYS_VENDOR
, "Hewlett-Packard"),
1479 DMI_MATCH(DMI_PRODUCT_NAME
, "HP Compaq 6715b"),
1483 .callback
= dmi_ignore_irq0_timer_override
,
1484 .ident
= "FUJITSU SIEMENS",
1486 DMI_MATCH(DMI_SYS_VENDOR
, "FUJITSU SIEMENS"),
1487 DMI_MATCH(DMI_PRODUCT_NAME
, "AMILO PRO V2030"),
1494 * acpi_boot_table_init() and acpi_boot_init()
1495 * called from setup_arch(), always.
1496 * 1. checksums all tables
1497 * 2. enumerates lapics
1498 * 3. enumerates io-apics
1500 * acpi_table_init() is separate to allow reading SRAT without
1501 * other side effects.
1503 * side effects of acpi_boot_init:
1504 * acpi_lapic = 1 if LAPIC found
1505 * acpi_ioapic = 1 if IOAPIC found
1506 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1507 * if acpi_blacklisted() acpi_disabled = 1;
1508 * acpi_irq_model=...
1512 void __init
acpi_boot_table_init(void)
1514 dmi_check_system(acpi_dmi_table
);
1517 * If acpi_disabled, bail out
1523 * Initialize the ACPI boot-time table parser.
1525 if (acpi_table_init()) {
1530 acpi_table_parse(ACPI_SIG_BOOT
, acpi_parse_sbf
);
1533 * blacklist may disable ACPI entirely
1535 if (acpi_blacklisted()) {
1537 printk(KERN_WARNING PREFIX
"acpi=force override\n");
1539 printk(KERN_WARNING PREFIX
"Disabling ACPI support\n");
1546 int __init
early_acpi_boot_init(void)
1549 * If acpi_disabled, bail out
1555 * Process the Multiple APIC Description Table (MADT), if present
1557 early_acpi_process_madt();
1562 int __init
acpi_boot_init(void)
1564 /* those are executed after early-quirks are executed */
1565 dmi_check_system(acpi_dmi_table_late
);
1568 * If acpi_disabled, bail out
1573 acpi_table_parse(ACPI_SIG_BOOT
, acpi_parse_sbf
);
1576 * set sci_int and PM timer address
1578 acpi_table_parse(ACPI_SIG_FADT
, acpi_parse_fadt
);
1581 * Process the Multiple APIC Description Table (MADT), if present
1583 acpi_process_madt();
1585 acpi_table_parse(ACPI_SIG_HPET
, acpi_parse_hpet
);
1588 x86_init
.pci
.init
= pci_acpi_init
;
1593 static int __init
parse_acpi(char *arg
)
1598 /* "acpi=off" disables both ACPI table parsing and interpreter */
1599 if (strcmp(arg
, "off") == 0) {
1602 /* acpi=force to over-ride black-list */
1603 else if (strcmp(arg
, "force") == 0) {
1607 /* acpi=strict disables out-of-spec workarounds */
1608 else if (strcmp(arg
, "strict") == 0) {
1611 /* acpi=rsdt use RSDT instead of XSDT */
1612 else if (strcmp(arg
, "rsdt") == 0) {
1613 acpi_rsdt_forced
= 1;
1615 /* "acpi=noirq" disables ACPI interrupt routing */
1616 else if (strcmp(arg
, "noirq") == 0) {
1619 /* "acpi=copy_dsdt" copys DSDT */
1620 else if (strcmp(arg
, "copy_dsdt") == 0) {
1621 acpi_gbl_copy_dsdt_locally
= 1;
1623 /* Core will printk when we return error. */
1628 early_param("acpi", parse_acpi
);
1630 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1631 static int __init
parse_pci(char *arg
)
1633 if (arg
&& strcmp(arg
, "noacpi") == 0)
1637 early_param("pci", parse_pci
);
1639 int __init
acpi_mps_check(void)
1641 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1642 /* mptable code is not built-in*/
1643 if (acpi_disabled
|| acpi_noirq
) {
1644 printk(KERN_WARNING
"MPS support code is not built-in.\n"
1645 "Using acpi=off or acpi=noirq or pci=noacpi "
1646 "may have problem\n");
1653 #ifdef CONFIG_X86_IO_APIC
1654 static int __init
parse_acpi_skip_timer_override(char *arg
)
1656 acpi_skip_timer_override
= 1;
1659 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override
);
1661 static int __init
parse_acpi_use_timer_override(char *arg
)
1663 acpi_use_timer_override
= 1;
1666 early_param("acpi_use_timer_override", parse_acpi_use_timer_override
);
1667 #endif /* CONFIG_X86_IO_APIC */
1669 static int __init
setup_acpi_sci(char *s
)
1673 if (!strcmp(s
, "edge"))
1674 acpi_sci_flags
= ACPI_MADT_TRIGGER_EDGE
|
1675 (acpi_sci_flags
& ~ACPI_MADT_TRIGGER_MASK
);
1676 else if (!strcmp(s
, "level"))
1677 acpi_sci_flags
= ACPI_MADT_TRIGGER_LEVEL
|
1678 (acpi_sci_flags
& ~ACPI_MADT_TRIGGER_MASK
);
1679 else if (!strcmp(s
, "high"))
1680 acpi_sci_flags
= ACPI_MADT_POLARITY_ACTIVE_HIGH
|
1681 (acpi_sci_flags
& ~ACPI_MADT_POLARITY_MASK
);
1682 else if (!strcmp(s
, "low"))
1683 acpi_sci_flags
= ACPI_MADT_POLARITY_ACTIVE_LOW
|
1684 (acpi_sci_flags
& ~ACPI_MADT_POLARITY_MASK
);
1689 early_param("acpi_sci", setup_acpi_sci
);
1691 int __acpi_acquire_global_lock(unsigned int *lock
)
1693 unsigned int old
, new, val
;
1696 new = (((old
& ~0x3) + 2) + ((old
>> 1) & 0x1));
1697 val
= cmpxchg(lock
, old
, new);
1698 } while (unlikely (val
!= old
));
1699 return (new < 3) ? -1 : 0;
1702 int __acpi_release_global_lock(unsigned int *lock
)
1704 unsigned int old
, new, val
;
1708 val
= cmpxchg(lock
, old
, new);
1709 } while (unlikely (val
!= old
));
1713 void __init
arch_reserve_mem_area(acpi_physical_address addr
, size_t size
)
1715 e820_add_region(addr
, size
, E820_ACPI
);