2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
26 #include <linux/init.h>
27 #include <linux/acpi.h>
28 #include <linux/acpi_pmtmr.h>
29 #include <linux/efi.h>
30 #include <linux/cpumask.h>
31 #include <linux/export.h>
32 #include <linux/dmi.h>
33 #include <linux/irq.h>
34 #include <linux/slab.h>
35 #include <linux/bootmem.h>
36 #include <linux/ioport.h>
37 #include <linux/pci.h>
39 #include <asm/irqdomain.h>
40 #include <asm/pci_x86.h>
41 #include <asm/pgtable.h>
42 #include <asm/io_apic.h>
45 #include <asm/mpspec.h>
47 #include <asm/i8259.h>
49 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
50 static int __initdata acpi_force = 0;
52 EXPORT_SYMBOL(acpi_disabled);
55 # include <asm/proto.h>
58 #define PREFIX "ACPI: "
60 int acpi_noirq; /* skip ACPI IRQ initialization */
61 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
62 EXPORT_SYMBOL(acpi_pci_disabled);
67 int acpi_disable_cmcff;
69 u8 acpi_sci_flags __initdata;
70 int acpi_sci_override_gsi __initdata;
71 int acpi_skip_timer_override __initdata;
72 int acpi_use_timer_override __initdata;
73 int acpi_fix_pin2_polarity __initdata;
75 #ifdef CONFIG_X86_LOCAL_APIC
76 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
80 * Locks related to IOAPIC hotplug
82 * ->device_hotplug_lock
85 * Interrupt mapping side:
90 static DEFINE_MUTEX(acpi_ioapic_lock);
92 /* --------------------------------------------------------------------------
93 Boot-time Configuration
94 -------------------------------------------------------------------------- */
97 * The default interrupt routing model is PIC (8259). This gets
98 * overridden if IOAPICs are enumerated (below).
100 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
104 * ISA irqs by default are the first 16 gsis but can be
105 * any gsi as specified by an interrupt source override.
107 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
108 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
111 #define ACPI_INVALID_GSI INT_MIN
114 * This is just a simple wrapper around early_ioremap(),
115 * with sanity checks for phys == 0 and size == 0.
117 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
123 return early_ioremap(phys, size);
126 void __init __acpi_unmap_table(char *map, unsigned long size)
131 early_iounmap(map, size);
134 #ifdef CONFIG_X86_LOCAL_APIC
135 static int __init acpi_parse_madt(struct acpi_table_header *table)
137 struct acpi_table_madt *madt = NULL;
139 if (!boot_cpu_has(X86_FEATURE_APIC))
142 madt = (struct acpi_table_madt *)table;
144 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
149 acpi_lapic_addr = (u64) madt->address;
151 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
155 default_acpi_madt_oem_check(madt->header.oem_id,
156 madt->header.oem_table_id);
162 * acpi_register_lapic - register a local apic and generates a logic cpu number
163 * @id: local apic id to register
164 * @acpiid: ACPI id to register
165 * @enabled: this cpu is enabled or not
167 * Returns the logic cpu number which maps to the local apic
169 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
171 unsigned int ver = 0;
174 if (id >= MAX_LOCAL_APIC) {
175 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
179 if (boot_cpu_physical_apicid != -1U)
180 ver = boot_cpu_apic_version;
182 cpu = __generic_processor_info(id, ver, enabled);
184 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
190 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
192 struct acpi_madt_local_x2apic *processor = NULL;
196 processor = (struct acpi_madt_local_x2apic *)header;
198 if (BAD_MADT_ENTRY(processor, end))
201 acpi_table_print_madt_entry(header);
203 apic_id = processor->local_apic_id;
204 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
205 #ifdef CONFIG_X86_X2APIC
207 * We need to register disabled CPU as well to permit
208 * counting disabled CPUs. This allows us to size
209 * cpus_possible_map more accurately, to permit
210 * to not preallocating memory for all NR_CPUS
211 * when we use CPU hotplug.
213 if (!apic->apic_id_valid(apic_id) && enabled)
214 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
216 acpi_register_lapic(apic_id, processor->uid, enabled);
218 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
225 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
227 struct acpi_madt_local_apic *processor = NULL;
229 processor = (struct acpi_madt_local_apic *)header;
231 if (BAD_MADT_ENTRY(processor, end))
234 acpi_table_print_madt_entry(header);
237 * We need to register disabled CPU as well to permit
238 * counting disabled CPUs. This allows us to size
239 * cpus_possible_map more accurately, to permit
240 * to not preallocating memory for all NR_CPUS
241 * when we use CPU hotplug.
243 acpi_register_lapic(processor->id, /* APIC ID */
244 processor->processor_id, /* ACPI ID */
245 processor->lapic_flags & ACPI_MADT_ENABLED);
251 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
253 struct acpi_madt_local_sapic *processor = NULL;
255 processor = (struct acpi_madt_local_sapic *)header;
257 if (BAD_MADT_ENTRY(processor, end))
260 acpi_table_print_madt_entry(header);
262 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
263 processor->processor_id, /* ACPI ID */
264 processor->lapic_flags & ACPI_MADT_ENABLED);
270 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
271 const unsigned long end)
273 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
275 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
277 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
280 acpi_table_print_madt_entry(header);
282 acpi_lapic_addr = lapic_addr_ovr->address;
288 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
289 const unsigned long end)
291 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
293 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
295 if (BAD_MADT_ENTRY(x2apic_nmi, end))
298 acpi_table_print_madt_entry(header);
300 if (x2apic_nmi->lint != 1)
301 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
307 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
309 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
311 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
313 if (BAD_MADT_ENTRY(lapic_nmi, end))
316 acpi_table_print_madt_entry(header);
318 if (lapic_nmi->lint != 1)
319 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
324 #endif /*CONFIG_X86_LOCAL_APIC */
326 #ifdef CONFIG_X86_IO_APIC
329 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
334 struct mpc_intsrc mp_irq;
337 * Convert 'gsi' to 'ioapic.pin'.
339 ioapic = mp_find_ioapic(gsi);
342 pin = mp_find_ioapic_pin(ioapic, gsi);
345 * TBD: This check is for faulty timer entries, where the override
346 * erroneously sets the trigger to level, resulting in a HUGE
347 * increase of timer interrupts!
349 if ((bus_irq == 0) && (trigger == 3))
352 mp_irq.type = MP_INTSRC;
353 mp_irq.irqtype = mp_INT;
354 mp_irq.irqflag = (trigger << 2) | polarity;
355 mp_irq.srcbus = MP_ISA_BUS;
356 mp_irq.srcbusirq = bus_irq; /* IRQ */
357 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
358 mp_irq.dstirq = pin; /* INTIN# */
360 mp_save_irq(&mp_irq);
363 * Reset default identity mapping if gsi is also an legacy IRQ,
364 * otherwise there will be more than one entry with the same GSI
365 * and acpi_isa_irq_to_gsi() may give wrong result.
367 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
368 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
369 isa_irq_to_gsi[bus_irq] = gsi;
372 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
375 #ifdef CONFIG_X86_MPPARSE
376 struct mpc_intsrc mp_irq;
377 struct pci_dev *pdev;
378 unsigned char number;
385 if (!dev || !dev_is_pci(dev))
388 pdev = to_pci_dev(dev);
389 number = pdev->bus->number;
392 /* print the entry should happen on mptable identically */
393 mp_irq.type = MP_INTSRC;
394 mp_irq.irqtype = mp_INT;
395 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
396 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
397 mp_irq.srcbus = number;
398 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
399 ioapic = mp_find_ioapic(gsi);
400 mp_irq.dstapic = mpc_ioapic_id(ioapic);
401 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
403 mp_save_irq(&mp_irq);
409 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
411 struct acpi_madt_io_apic *ioapic = NULL;
412 struct ioapic_domain_cfg cfg = {
413 .type = IOAPIC_DOMAIN_DYNAMIC,
414 .ops = &mp_ioapic_irqdomain_ops,
417 ioapic = (struct acpi_madt_io_apic *)header;
419 if (BAD_MADT_ENTRY(ioapic, end))
422 acpi_table_print_madt_entry(header);
424 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
425 if (ioapic->global_irq_base < nr_legacy_irqs())
426 cfg.type = IOAPIC_DOMAIN_LEGACY;
428 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
435 * Parse Interrupt Source Override for the ACPI SCI
437 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
439 if (trigger == 0) /* compatible SCI trigger is level */
442 if (polarity == 0) /* compatible SCI polarity is low */
445 /* Command-line over-ride via acpi_sci= */
446 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
447 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
449 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
450 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
452 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
455 * stash over-ride to indicate we've been here
456 * and for later update of acpi_gbl_FADT
458 acpi_sci_override_gsi = gsi;
463 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
464 const unsigned long end)
466 struct acpi_madt_interrupt_override *intsrc = NULL;
468 intsrc = (struct acpi_madt_interrupt_override *)header;
470 if (BAD_MADT_ENTRY(intsrc, end))
473 acpi_table_print_madt_entry(header);
475 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
476 acpi_sci_ioapic_setup(intsrc->source_irq,
477 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
478 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
483 if (intsrc->source_irq == 0) {
484 if (acpi_skip_timer_override) {
485 printk(PREFIX "BIOS IRQ0 override ignored.\n");
489 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
490 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
491 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
492 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
496 mp_override_legacy_irq(intsrc->source_irq,
497 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
498 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
505 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
507 struct acpi_madt_nmi_source *nmi_src = NULL;
509 nmi_src = (struct acpi_madt_nmi_source *)header;
511 if (BAD_MADT_ENTRY(nmi_src, end))
514 acpi_table_print_madt_entry(header);
516 /* TBD: Support nimsrc entries? */
521 #endif /* CONFIG_X86_IO_APIC */
524 * acpi_pic_sci_set_trigger()
526 * use ELCR to set PIC-mode trigger type for SCI
528 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
529 * it may require Edge Trigger -- use "acpi_sci=edge"
531 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
532 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
533 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
534 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
537 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
539 unsigned int mask = 1 << irq;
540 unsigned int old, new;
542 /* Real old ELCR mask */
543 old = inb(0x4d0) | (inb(0x4d1) << 8);
546 * If we use ACPI to set PCI IRQs, then we should clear ELCR
547 * since we will set it correctly as we enable the PCI irq
550 new = acpi_noirq ? old : 0;
553 * Update SCI information in the ELCR, it isn't in the PCI
557 case 1: /* Edge - clear */
560 case 3: /* Level - set */
568 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
570 outb(new >> 8, 0x4d1);
573 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
575 int rc, irq, trigger, polarity;
577 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
582 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
584 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
585 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
586 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
595 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
597 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
599 if (isa_irq < nr_legacy_irqs() &&
600 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
601 *gsi = isa_irq_to_gsi[isa_irq];
608 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
609 int trigger, int polarity)
613 * Make sure all (legacy) PCI IRQs are set as level-triggered.
615 if (trigger == ACPI_LEVEL_SENSITIVE)
616 elcr_set_level_irq(gsi);
622 #ifdef CONFIG_X86_LOCAL_APIC
623 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
624 int trigger, int polarity)
627 #ifdef CONFIG_X86_IO_APIC
629 struct irq_alloc_info info;
631 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
632 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
633 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
634 ioapic_set_alloc_attr(&info, node, trigger, polarity);
636 mutex_lock(&acpi_ioapic_lock);
637 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
638 /* Don't set up the ACPI SCI because it's already set up */
639 if (irq >= 0 && enable_update_mptable &&
640 acpi_gbl_FADT.sci_interrupt != gsi)
641 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
642 mutex_unlock(&acpi_ioapic_lock);
648 static void acpi_unregister_gsi_ioapic(u32 gsi)
650 #ifdef CONFIG_X86_IO_APIC
653 mutex_lock(&acpi_ioapic_lock);
654 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
657 mutex_unlock(&acpi_ioapic_lock);
662 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
663 int trigger, int polarity) = acpi_register_gsi_pic;
664 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
666 #ifdef CONFIG_ACPI_SLEEP
667 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
669 int (*acpi_suspend_lowlevel)(void);
673 * success: return IRQ number (>=0)
674 * failure: return < 0
676 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
678 return __acpi_register_gsi(dev, gsi, trigger, polarity);
680 EXPORT_SYMBOL_GPL(acpi_register_gsi);
682 void acpi_unregister_gsi(u32 gsi)
684 if (__acpi_unregister_gsi)
685 __acpi_unregister_gsi(gsi);
687 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
689 #ifdef CONFIG_X86_LOCAL_APIC
690 static void __init acpi_set_irq_model_ioapic(void)
692 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
693 __acpi_register_gsi = acpi_register_gsi_ioapic;
694 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
700 * ACPI based hotplug support for CPU
702 #ifdef CONFIG_ACPI_HOTPLUG_CPU
703 #include <acpi/processor.h>
705 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
707 #ifdef CONFIG_ACPI_NUMA
710 nid = acpi_get_node(handle);
712 set_apicid_to_node(physid, nid);
713 numa_set_node(cpu, nid);
719 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu)
723 cpu = acpi_register_lapic(physid, U32_MAX, ACPI_MADT_ENABLED);
725 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
729 acpi_processor_set_pdc(handle);
730 acpi_map_cpu2node(handle, cpu, physid);
735 EXPORT_SYMBOL(acpi_map_cpu);
737 int acpi_unmap_cpu(int cpu)
739 #ifdef CONFIG_ACPI_NUMA
740 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
743 per_cpu(x86_cpu_to_apicid, cpu) = -1;
744 set_cpu_present(cpu, false);
749 EXPORT_SYMBOL(acpi_unmap_cpu);
750 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
752 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
755 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
758 struct ioapic_domain_cfg cfg = {
759 .type = IOAPIC_DOMAIN_DYNAMIC,
760 .ops = &mp_ioapic_irqdomain_ops,
763 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
765 unsigned long long uid;
768 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
770 if (ACPI_FAILURE(status)) {
771 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
774 ioapic_id = (int)uid;
777 mutex_lock(&acpi_ioapic_lock);
778 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
779 mutex_unlock(&acpi_ioapic_lock);
784 EXPORT_SYMBOL(acpi_register_ioapic);
786 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
790 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
791 mutex_lock(&acpi_ioapic_lock);
792 ret = mp_unregister_ioapic(gsi_base);
793 mutex_unlock(&acpi_ioapic_lock);
798 EXPORT_SYMBOL(acpi_unregister_ioapic);
801 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
802 * has been registered
803 * @handle: ACPI handle of the IOAPIC deivce
804 * @gsi_base: GSI base associated with the IOAPIC
806 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
807 * with acpi_register_ioapic()/acpi_unregister_ioapic().
809 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
813 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
814 mutex_lock(&acpi_ioapic_lock);
815 ret = mp_ioapic_registered(gsi_base);
816 mutex_unlock(&acpi_ioapic_lock);
822 static int __init acpi_parse_sbf(struct acpi_table_header *table)
824 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
826 sbf_port = sb->cmos_index; /* Save CMOS port */
831 #ifdef CONFIG_HPET_TIMER
832 #include <asm/hpet.h>
834 static struct resource *hpet_res __initdata;
836 static int __init acpi_parse_hpet(struct acpi_table_header *table)
838 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
840 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
841 printk(KERN_WARNING PREFIX "HPET timers must be located in "
846 hpet_address = hpet_tbl->address.address;
847 hpet_blockid = hpet_tbl->sequence;
850 * Some broken BIOSes advertise HPET at 0x0. We really do not
851 * want to allocate a resource there.
854 printk(KERN_WARNING PREFIX
855 "HPET id: %#x base: %#lx is invalid\n",
856 hpet_tbl->id, hpet_address);
861 * Some even more broken BIOSes advertise HPET at
862 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
865 if (hpet_address == 0xfed0000000000000UL) {
866 if (!hpet_force_user) {
867 printk(KERN_WARNING PREFIX "HPET id: %#x "
868 "base: 0xfed0000000000000 is bogus\n "
869 "try hpet=force on the kernel command line to "
870 "fix it up to 0xfed00000.\n", hpet_tbl->id);
874 printk(KERN_WARNING PREFIX
875 "HPET id: %#x base: 0xfed0000000000000 fixed up "
876 "to 0xfed00000.\n", hpet_tbl->id);
880 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
881 hpet_tbl->id, hpet_address);
884 * Allocate and initialize the HPET firmware resource for adding into
885 * the resource tree during the lateinit timeframe.
887 #define HPET_RESOURCE_NAME_SIZE 9
888 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
890 hpet_res->name = (void *)&hpet_res[1];
891 hpet_res->flags = IORESOURCE_MEM;
892 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
895 hpet_res->start = hpet_address;
896 hpet_res->end = hpet_address + (1 * 1024) - 1;
902 * hpet_insert_resource inserts the HPET resources used into the resource
905 static __init int hpet_insert_resource(void)
910 return insert_resource(&iomem_resource, hpet_res);
913 late_initcall(hpet_insert_resource);
916 #define acpi_parse_hpet NULL
919 static int __init acpi_parse_fadt(struct acpi_table_header *table)
921 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
922 pr_debug("ACPI: no legacy devices present\n");
923 x86_platform.legacy.devices.pnpbios = 0;
926 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
927 pr_debug("ACPI: not registering RTC platform device\n");
928 x86_platform.legacy.rtc = 0;
931 #ifdef CONFIG_X86_PM_TIMER
932 /* detect the location of the ACPI PM Timer */
933 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
935 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
936 ACPI_ADR_SPACE_SYSTEM_IO)
939 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
941 * "X" fields are optional extensions to the original V1.0
942 * fields, so we must selectively expand V1.0 fields if the
943 * corresponding X field is zero.
946 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
949 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
952 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
958 #ifdef CONFIG_X86_LOCAL_APIC
960 * Parse LAPIC entries in MADT
961 * returns 0 on success, < 0 on error
964 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
968 if (!boot_cpu_has(X86_FEATURE_APIC))
972 * Note that the LAPIC address is obtained from the MADT (32-bit value)
973 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
976 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
977 acpi_parse_lapic_addr_ovr, 0);
979 printk(KERN_ERR PREFIX
980 "Error parsing LAPIC address override entry\n");
984 register_lapic_address(acpi_lapic_addr);
989 static int __init acpi_parse_madt_lapic_entries(void)
994 struct acpi_subtable_proc madt_proc[2];
996 if (!boot_cpu_has(X86_FEATURE_APIC))
999 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1000 acpi_parse_sapic, MAX_LOCAL_APIC);
1003 memset(madt_proc, 0, sizeof(madt_proc));
1004 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1005 madt_proc[0].handler = acpi_parse_lapic;
1006 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1007 madt_proc[1].handler = acpi_parse_x2apic;
1008 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1009 sizeof(struct acpi_table_madt),
1010 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1012 printk(KERN_ERR PREFIX
1013 "Error parsing LAPIC/X2APIC entries\n");
1017 count = madt_proc[0].count;
1018 x2count = madt_proc[1].count;
1020 if (!count && !x2count) {
1021 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1022 /* TBD: Cleanup to allow fallback to MPS */
1024 } else if (count < 0 || x2count < 0) {
1025 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1026 /* TBD: Cleanup to allow fallback to MPS */
1030 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1031 acpi_parse_x2apic_nmi, 0);
1032 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1033 acpi_parse_lapic_nmi, 0);
1034 if (count < 0 || x2count < 0) {
1035 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1036 /* TBD: Cleanup to allow fallback to MPS */
1041 #endif /* CONFIG_X86_LOCAL_APIC */
1043 #ifdef CONFIG_X86_IO_APIC
1044 static void __init mp_config_acpi_legacy_irqs(void)
1047 struct mpc_intsrc mp_irq;
1051 * Fabricate the legacy ISA bus (bus #31).
1053 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1055 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1056 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1059 * Use the default configuration for the IRQs 0-15. Unless
1060 * overridden by (MADT) interrupt source override entries.
1062 for (i = 0; i < nr_legacy_irqs(); i++) {
1064 unsigned int dstapic;
1068 /* Locate the gsi that irq i maps to. */
1069 if (acpi_isa_irq_to_gsi(i, &gsi))
1073 * Locate the IOAPIC that manages the ISA IRQ.
1075 ioapic = mp_find_ioapic(gsi);
1078 pin = mp_find_ioapic_pin(ioapic, gsi);
1079 dstapic = mpc_ioapic_id(ioapic);
1081 for (idx = 0; idx < mp_irq_entries; idx++) {
1082 struct mpc_intsrc *irq = mp_irqs + idx;
1084 /* Do we already have a mapping for this ISA IRQ? */
1085 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1088 /* Do we already have a mapping for this IOAPIC pin */
1089 if (irq->dstapic == dstapic && irq->dstirq == pin)
1093 if (idx != mp_irq_entries) {
1094 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1095 continue; /* IRQ already used */
1098 mp_irq.type = MP_INTSRC;
1099 mp_irq.irqflag = 0; /* Conforming */
1100 mp_irq.srcbus = MP_ISA_BUS;
1101 mp_irq.dstapic = dstapic;
1102 mp_irq.irqtype = mp_INT;
1103 mp_irq.srcbusirq = i; /* Identity mapped */
1104 mp_irq.dstirq = pin;
1106 mp_save_irq(&mp_irq);
1111 * Parse IOAPIC related entries in MADT
1112 * returns 0 on success, < 0 on error
1114 static int __init acpi_parse_madt_ioapic_entries(void)
1119 * ACPI interpreter is required to complete interrupt setup,
1120 * so if it is off, don't enumerate the io-apics with ACPI.
1121 * If MPS is present, it will handle them,
1122 * otherwise the system will stay in PIC mode
1124 if (acpi_disabled || acpi_noirq)
1127 if (!boot_cpu_has(X86_FEATURE_APIC))
1131 * if "noapic" boot option, don't look for IO-APICs
1133 if (skip_ioapic_setup) {
1134 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1135 "due to 'noapic' option.\n");
1139 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1142 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1144 } else if (count < 0) {
1145 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1149 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1150 acpi_parse_int_src_ovr, nr_irqs);
1152 printk(KERN_ERR PREFIX
1153 "Error parsing interrupt source overrides entry\n");
1154 /* TBD: Cleanup to allow fallback to MPS */
1159 * If BIOS did not supply an INT_SRC_OVR for the SCI
1160 * pretend we got one so we can set the SCI flags.
1162 if (!acpi_sci_override_gsi)
1163 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1164 acpi_gbl_FADT.sci_interrupt);
1166 /* Fill in identity legacy mappings where no override */
1167 mp_config_acpi_legacy_irqs();
1169 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1170 acpi_parse_nmi_src, nr_irqs);
1172 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1173 /* TBD: Cleanup to allow fallback to MPS */
1180 static inline int acpi_parse_madt_ioapic_entries(void)
1184 #endif /* !CONFIG_X86_IO_APIC */
1186 static void __init early_acpi_process_madt(void)
1188 #ifdef CONFIG_X86_LOCAL_APIC
1191 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1194 * Parse MADT LAPIC entries
1196 error = early_acpi_parse_madt_lapic_addr_ovr();
1199 smp_found_config = 1;
1201 if (error == -EINVAL) {
1203 * Dell Precision Workstation 410, 610 come here.
1205 printk(KERN_ERR PREFIX
1206 "Invalid BIOS MADT, disabling ACPI\n");
1213 static void __init acpi_process_madt(void)
1215 #ifdef CONFIG_X86_LOCAL_APIC
1218 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1221 * Parse MADT LAPIC entries
1223 error = acpi_parse_madt_lapic_entries();
1228 * Parse MADT IO-APIC entries
1230 mutex_lock(&acpi_ioapic_lock);
1231 error = acpi_parse_madt_ioapic_entries();
1232 mutex_unlock(&acpi_ioapic_lock);
1234 acpi_set_irq_model_ioapic();
1236 smp_found_config = 1;
1239 if (error == -EINVAL) {
1241 * Dell Precision Workstation 410, 610 come here.
1243 printk(KERN_ERR PREFIX
1244 "Invalid BIOS MADT, disabling ACPI\n");
1249 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1250 * In the event an MPS table was found, forget it.
1251 * Boot with "acpi=off" to use MPS on such a system.
1253 if (smp_found_config) {
1254 printk(KERN_WARNING PREFIX
1255 "No APIC-table, disabling MPS\n");
1256 smp_found_config = 0;
1261 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1262 * processors, where MPS only supports physical.
1264 if (acpi_lapic && acpi_ioapic)
1265 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1267 else if (acpi_lapic)
1268 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1269 "configuration information\n");
1274 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1277 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1284 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1287 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1294 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1297 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1301 "Warning: DMI blacklist says broken, but acpi forced\n");
1307 * Force ignoring BIOS IRQ0 override
1309 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1311 if (!acpi_skip_timer_override) {
1312 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1314 acpi_skip_timer_override = 1;
1320 * ACPI offers an alternative platform interface model that removes
1321 * ACPI hardware requirements for platforms that do not implement
1322 * the PC Architecture.
1324 * We initialize the Hardware-reduced ACPI model here:
1326 static void __init acpi_reduced_hw_init(void)
1328 if (acpi_gbl_reduced_hardware) {
1330 * Override x86_init functions and bypass legacy pic
1331 * in Hardware-reduced ACPI mode
1333 x86_init.timers.timer_init = x86_init_noop;
1334 x86_init.irqs.pre_vector_init = x86_init_noop;
1335 legacy_pic = &null_legacy_pic;
1340 * If your system is blacklisted here, but you find that acpi=force
1341 * works for you, please contact linux-acpi@vger.kernel.org
1343 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1345 * Boxes that need ACPI disabled
1348 .callback = dmi_disable_acpi,
1349 .ident = "IBM Thinkpad",
1351 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1352 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1357 * Boxes that need ACPI PCI IRQ routing disabled
1360 .callback = disable_acpi_irq,
1361 .ident = "ASUS A7V",
1363 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1364 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1365 /* newer BIOS, Revision 1011, does work */
1366 DMI_MATCH(DMI_BIOS_VERSION,
1367 "ASUS A7V ACPI BIOS Revision 1007"),
1372 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1373 * for LPC bridge, which is needed for the PCI
1374 * interrupt links to work. DSDT fix is in bug 5966.
1375 * 2645, 2646 model numbers are shared with 600/600E/600X
1377 .callback = disable_acpi_irq,
1378 .ident = "IBM Thinkpad 600 Series 2645",
1380 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1381 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1385 .callback = disable_acpi_irq,
1386 .ident = "IBM Thinkpad 600 Series 2646",
1388 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1389 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1393 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1396 .callback = disable_acpi_pci,
1397 .ident = "ASUS PR-DLS",
1399 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1400 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1401 DMI_MATCH(DMI_BIOS_VERSION,
1402 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1403 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1407 .callback = disable_acpi_pci,
1408 .ident = "Acer TravelMate 36x Laptop",
1410 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1411 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1417 /* second table for DMI checks that should run after early-quirks */
1418 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1420 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1421 * which includes some code which overrides all temperature
1422 * trip points to 16C if the INTIN2 input of the I/O APIC
1423 * is enabled. This input is incorrectly designated the
1424 * ISA IRQ 0 via an interrupt source override even though
1425 * it is wired to the output of the master 8259A and INTIN0
1426 * is not connected at all. Force ignoring BIOS IRQ0
1427 * override in that cases.
1430 .callback = dmi_ignore_irq0_timer_override,
1431 .ident = "HP nx6115 laptop",
1433 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1434 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1438 .callback = dmi_ignore_irq0_timer_override,
1439 .ident = "HP NX6125 laptop",
1441 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1442 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1446 .callback = dmi_ignore_irq0_timer_override,
1447 .ident = "HP NX6325 laptop",
1449 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1450 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1454 .callback = dmi_ignore_irq0_timer_override,
1455 .ident = "HP 6715b laptop",
1457 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1458 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1462 .callback = dmi_ignore_irq0_timer_override,
1463 .ident = "FUJITSU SIEMENS",
1465 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1466 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1473 * acpi_boot_table_init() and acpi_boot_init()
1474 * called from setup_arch(), always.
1475 * 1. checksums all tables
1476 * 2. enumerates lapics
1477 * 3. enumerates io-apics
1479 * acpi_table_init() is separate to allow reading SRAT without
1480 * other side effects.
1482 * side effects of acpi_boot_init:
1483 * acpi_lapic = 1 if LAPIC found
1484 * acpi_ioapic = 1 if IOAPIC found
1485 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1486 * if acpi_blacklisted() acpi_disabled = 1;
1487 * acpi_irq_model=...
1491 void __init acpi_boot_table_init(void)
1493 dmi_check_system(acpi_dmi_table);
1496 * If acpi_disabled, bail out
1502 * Initialize the ACPI boot-time table parser.
1504 if (acpi_table_init()) {
1509 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1512 * blacklist may disable ACPI entirely
1514 if (acpi_blacklisted()) {
1516 printk(KERN_WARNING PREFIX "acpi=force override\n");
1518 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1525 int __init early_acpi_boot_init(void)
1528 * If acpi_disabled, bail out
1534 * Process the Multiple APIC Description Table (MADT), if present
1536 early_acpi_process_madt();
1539 * Hardware-reduced ACPI mode initialization:
1541 acpi_reduced_hw_init();
1546 int __init acpi_boot_init(void)
1548 /* those are executed after early-quirks are executed */
1549 dmi_check_system(acpi_dmi_table_late);
1552 * If acpi_disabled, bail out
1557 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1560 * set sci_int and PM timer address
1562 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1565 * Process the Multiple APIC Description Table (MADT), if present
1567 acpi_process_madt();
1569 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1572 x86_init.pci.init = pci_acpi_init;
1577 static int __init parse_acpi(char *arg)
1582 /* "acpi=off" disables both ACPI table parsing and interpreter */
1583 if (strcmp(arg, "off") == 0) {
1586 /* acpi=force to over-ride black-list */
1587 else if (strcmp(arg, "force") == 0) {
1591 /* acpi=strict disables out-of-spec workarounds */
1592 else if (strcmp(arg, "strict") == 0) {
1595 /* acpi=rsdt use RSDT instead of XSDT */
1596 else if (strcmp(arg, "rsdt") == 0) {
1597 acpi_gbl_do_not_use_xsdt = TRUE;
1599 /* "acpi=noirq" disables ACPI interrupt routing */
1600 else if (strcmp(arg, "noirq") == 0) {
1603 /* "acpi=copy_dsdt" copys DSDT */
1604 else if (strcmp(arg, "copy_dsdt") == 0) {
1605 acpi_gbl_copy_dsdt_locally = 1;
1607 /* "acpi=nocmcff" disables FF mode for corrected errors */
1608 else if (strcmp(arg, "nocmcff") == 0) {
1609 acpi_disable_cmcff = 1;
1611 /* Core will printk when we return error. */
1616 early_param("acpi", parse_acpi);
1618 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1619 static int __init parse_pci(char *arg)
1621 if (arg && strcmp(arg, "noacpi") == 0)
1625 early_param("pci", parse_pci);
1627 int __init acpi_mps_check(void)
1629 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1630 /* mptable code is not built-in*/
1631 if (acpi_disabled || acpi_noirq) {
1632 printk(KERN_WARNING "MPS support code is not built-in.\n"
1633 "Using acpi=off or acpi=noirq or pci=noacpi "
1634 "may have problem\n");
1641 #ifdef CONFIG_X86_IO_APIC
1642 static int __init parse_acpi_skip_timer_override(char *arg)
1644 acpi_skip_timer_override = 1;
1647 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1649 static int __init parse_acpi_use_timer_override(char *arg)
1651 acpi_use_timer_override = 1;
1654 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1655 #endif /* CONFIG_X86_IO_APIC */
1657 static int __init setup_acpi_sci(char *s)
1661 if (!strcmp(s, "edge"))
1662 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1663 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1664 else if (!strcmp(s, "level"))
1665 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1666 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1667 else if (!strcmp(s, "high"))
1668 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1669 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1670 else if (!strcmp(s, "low"))
1671 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1672 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1677 early_param("acpi_sci", setup_acpi_sci);
1679 int __acpi_acquire_global_lock(unsigned int *lock)
1681 unsigned int old, new, val;
1684 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1685 val = cmpxchg(lock, old, new);
1686 } while (unlikely (val != old));
1687 return (new < 3) ? -1 : 0;
1690 int __acpi_release_global_lock(unsigned int *lock)
1692 unsigned int old, new, val;
1696 val = cmpxchg(lock, old, new);
1697 } while (unlikely (val != old));
1701 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1703 e820_add_region(addr, size, E820_ACPI);