2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
26 #include <linux/init.h>
27 #include <linux/acpi.h>
28 #include <linux/acpi_pmtmr.h>
29 #include <linux/efi.h>
30 #include <linux/cpumask.h>
31 #include <linux/export.h>
32 #include <linux/dmi.h>
33 #include <linux/irq.h>
34 #include <linux/slab.h>
35 #include <linux/bootmem.h>
36 #include <linux/ioport.h>
37 #include <linux/pci.h>
38 #include <linux/efi-bgrt.h>
40 #include <asm/e820/api.h>
41 #include <asm/irqdomain.h>
42 #include <asm/pci_x86.h>
43 #include <asm/pgtable.h>
44 #include <asm/io_apic.h>
47 #include <asm/mpspec.h>
49 #include <asm/i8259.h>
51 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
52 static int __initdata acpi_force = 0;
54 EXPORT_SYMBOL(acpi_disabled);
57 # include <asm/proto.h>
60 #define PREFIX "ACPI: "
62 int acpi_noirq; /* skip ACPI IRQ initialization */
63 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
64 EXPORT_SYMBOL(acpi_pci_disabled);
69 int acpi_disable_cmcff;
71 u8 acpi_sci_flags __initdata;
72 int acpi_sci_override_gsi __initdata;
73 int acpi_skip_timer_override __initdata;
74 int acpi_use_timer_override __initdata;
75 int acpi_fix_pin2_polarity __initdata;
77 #ifdef CONFIG_X86_LOCAL_APIC
78 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
81 #ifdef CONFIG_X86_IO_APIC
83 * Locks related to IOAPIC hotplug
85 * ->device_hotplug_lock
88 * Interrupt mapping side:
93 static DEFINE_MUTEX(acpi_ioapic_lock);
96 /* --------------------------------------------------------------------------
97 Boot-time Configuration
98 -------------------------------------------------------------------------- */
101 * The default interrupt routing model is PIC (8259). This gets
102 * overridden if IOAPICs are enumerated (below).
104 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
108 * ISA irqs by default are the first 16 gsis but can be
109 * any gsi as specified by an interrupt source override.
111 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
112 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
115 #define ACPI_INVALID_GSI INT_MIN
118 * This is just a simple wrapper around early_memremap(),
119 * with sanity checks for phys == 0 and size == 0.
121 void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)
127 return early_memremap(phys, size);
130 void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
135 early_memunmap(map, size);
138 #ifdef CONFIG_X86_LOCAL_APIC
139 static int __init acpi_parse_madt(struct acpi_table_header *table)
141 struct acpi_table_madt *madt = NULL;
143 if (!boot_cpu_has(X86_FEATURE_APIC))
146 madt = (struct acpi_table_madt *)table;
148 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
153 acpi_lapic_addr = (u64) madt->address;
155 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
159 default_acpi_madt_oem_check(madt->header.oem_id,
160 madt->header.oem_table_id);
166 * acpi_register_lapic - register a local apic and generates a logic cpu number
167 * @id: local apic id to register
168 * @acpiid: ACPI id to register
169 * @enabled: this cpu is enabled or not
171 * Returns the logic cpu number which maps to the local apic
173 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
175 unsigned int ver = 0;
178 if (id >= MAX_LOCAL_APIC) {
179 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
188 if (boot_cpu_physical_apicid != -1U)
189 ver = boot_cpu_apic_version;
191 cpu = generic_processor_info(id, ver);
193 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
199 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
201 struct acpi_madt_local_x2apic *processor = NULL;
202 #ifdef CONFIG_X86_X2APIC
207 processor = (struct acpi_madt_local_x2apic *)header;
209 if (BAD_MADT_ENTRY(processor, end))
212 acpi_table_print_madt_entry(header);
214 #ifdef CONFIG_X86_X2APIC
215 apic_id = processor->local_apic_id;
216 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
219 * We need to register disabled CPU as well to permit
220 * counting disabled CPUs. This allows us to size
221 * cpus_possible_map more accurately, to permit
222 * to not preallocating memory for all NR_CPUS
223 * when we use CPU hotplug.
225 if (!apic->apic_id_valid(apic_id) && enabled)
226 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
228 acpi_register_lapic(apic_id, processor->uid, enabled);
230 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
237 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
239 struct acpi_madt_local_apic *processor = NULL;
241 processor = (struct acpi_madt_local_apic *)header;
243 if (BAD_MADT_ENTRY(processor, end))
246 acpi_table_print_madt_entry(header);
248 /* Ignore invalid ID */
249 if (processor->id == 0xff)
253 * We need to register disabled CPU as well to permit
254 * counting disabled CPUs. This allows us to size
255 * cpus_possible_map more accurately, to permit
256 * to not preallocating memory for all NR_CPUS
257 * when we use CPU hotplug.
259 acpi_register_lapic(processor->id, /* APIC ID */
260 processor->processor_id, /* ACPI ID */
261 processor->lapic_flags & ACPI_MADT_ENABLED);
267 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
269 struct acpi_madt_local_sapic *processor = NULL;
271 processor = (struct acpi_madt_local_sapic *)header;
273 if (BAD_MADT_ENTRY(processor, end))
276 acpi_table_print_madt_entry(header);
278 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
279 processor->processor_id, /* ACPI ID */
280 processor->lapic_flags & ACPI_MADT_ENABLED);
286 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
287 const unsigned long end)
289 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
291 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
293 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
296 acpi_table_print_madt_entry(header);
298 acpi_lapic_addr = lapic_addr_ovr->address;
304 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
305 const unsigned long end)
307 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
309 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
311 if (BAD_MADT_ENTRY(x2apic_nmi, end))
314 acpi_table_print_madt_entry(header);
316 if (x2apic_nmi->lint != 1)
317 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
323 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
325 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
327 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
329 if (BAD_MADT_ENTRY(lapic_nmi, end))
332 acpi_table_print_madt_entry(header);
334 if (lapic_nmi->lint != 1)
335 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
340 #endif /*CONFIG_X86_LOCAL_APIC */
342 #ifdef CONFIG_X86_IO_APIC
345 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
350 struct mpc_intsrc mp_irq;
353 * Check bus_irq boundary.
355 if (bus_irq >= NR_IRQS_LEGACY) {
356 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq);
361 * Convert 'gsi' to 'ioapic.pin'.
363 ioapic = mp_find_ioapic(gsi);
366 pin = mp_find_ioapic_pin(ioapic, gsi);
369 * TBD: This check is for faulty timer entries, where the override
370 * erroneously sets the trigger to level, resulting in a HUGE
371 * increase of timer interrupts!
373 if ((bus_irq == 0) && (trigger == 3))
376 mp_irq.type = MP_INTSRC;
377 mp_irq.irqtype = mp_INT;
378 mp_irq.irqflag = (trigger << 2) | polarity;
379 mp_irq.srcbus = MP_ISA_BUS;
380 mp_irq.srcbusirq = bus_irq; /* IRQ */
381 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
382 mp_irq.dstirq = pin; /* INTIN# */
384 mp_save_irq(&mp_irq);
387 * Reset default identity mapping if gsi is also an legacy IRQ,
388 * otherwise there will be more than one entry with the same GSI
389 * and acpi_isa_irq_to_gsi() may give wrong result.
391 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
392 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
393 isa_irq_to_gsi[bus_irq] = gsi;
396 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
399 #ifdef CONFIG_X86_MPPARSE
400 struct mpc_intsrc mp_irq;
401 struct pci_dev *pdev;
402 unsigned char number;
409 if (!dev || !dev_is_pci(dev))
412 pdev = to_pci_dev(dev);
413 number = pdev->bus->number;
416 /* print the entry should happen on mptable identically */
417 mp_irq.type = MP_INTSRC;
418 mp_irq.irqtype = mp_INT;
419 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
420 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
421 mp_irq.srcbus = number;
422 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
423 ioapic = mp_find_ioapic(gsi);
424 mp_irq.dstapic = mpc_ioapic_id(ioapic);
425 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
427 mp_save_irq(&mp_irq);
433 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
435 struct acpi_madt_io_apic *ioapic = NULL;
436 struct ioapic_domain_cfg cfg = {
437 .type = IOAPIC_DOMAIN_DYNAMIC,
438 .ops = &mp_ioapic_irqdomain_ops,
441 ioapic = (struct acpi_madt_io_apic *)header;
443 if (BAD_MADT_ENTRY(ioapic, end))
446 acpi_table_print_madt_entry(header);
448 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
449 if (ioapic->global_irq_base < nr_legacy_irqs())
450 cfg.type = IOAPIC_DOMAIN_LEGACY;
452 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
459 * Parse Interrupt Source Override for the ACPI SCI
461 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
463 if (trigger == 0) /* compatible SCI trigger is level */
466 if (polarity == 0) /* compatible SCI polarity is low */
469 /* Command-line over-ride via acpi_sci= */
470 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
471 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
473 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
474 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
476 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
477 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
480 * stash over-ride to indicate we've been here
481 * and for later update of acpi_gbl_FADT
483 acpi_sci_override_gsi = gsi;
488 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
489 const unsigned long end)
491 struct acpi_madt_interrupt_override *intsrc = NULL;
493 intsrc = (struct acpi_madt_interrupt_override *)header;
495 if (BAD_MADT_ENTRY(intsrc, end))
498 acpi_table_print_madt_entry(header);
500 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
501 acpi_sci_ioapic_setup(intsrc->source_irq,
502 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
503 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
508 if (intsrc->source_irq == 0) {
509 if (acpi_skip_timer_override) {
510 printk(PREFIX "BIOS IRQ0 override ignored.\n");
514 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
515 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
516 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
517 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
521 mp_override_legacy_irq(intsrc->source_irq,
522 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
523 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
530 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
532 struct acpi_madt_nmi_source *nmi_src = NULL;
534 nmi_src = (struct acpi_madt_nmi_source *)header;
536 if (BAD_MADT_ENTRY(nmi_src, end))
539 acpi_table_print_madt_entry(header);
541 /* TBD: Support nimsrc entries? */
546 #endif /* CONFIG_X86_IO_APIC */
549 * acpi_pic_sci_set_trigger()
551 * use ELCR to set PIC-mode trigger type for SCI
553 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
554 * it may require Edge Trigger -- use "acpi_sci=edge"
556 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
557 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
558 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
559 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
562 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
564 unsigned int mask = 1 << irq;
565 unsigned int old, new;
567 /* Real old ELCR mask */
568 old = inb(0x4d0) | (inb(0x4d1) << 8);
571 * If we use ACPI to set PCI IRQs, then we should clear ELCR
572 * since we will set it correctly as we enable the PCI irq
575 new = acpi_noirq ? old : 0;
578 * Update SCI information in the ELCR, it isn't in the PCI
582 case 1: /* Edge - clear */
585 case 3: /* Level - set */
593 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
595 outb(new >> 8, 0x4d1);
598 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
600 int rc, irq, trigger, polarity;
602 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
607 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
609 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
610 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
611 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
620 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
622 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
624 if (isa_irq < nr_legacy_irqs() &&
625 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
626 *gsi = isa_irq_to_gsi[isa_irq];
633 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
634 int trigger, int polarity)
638 * Make sure all (legacy) PCI IRQs are set as level-triggered.
640 if (trigger == ACPI_LEVEL_SENSITIVE)
641 elcr_set_level_irq(gsi);
647 #ifdef CONFIG_X86_LOCAL_APIC
648 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
649 int trigger, int polarity)
652 #ifdef CONFIG_X86_IO_APIC
654 struct irq_alloc_info info;
656 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
657 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
658 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
659 ioapic_set_alloc_attr(&info, node, trigger, polarity);
661 mutex_lock(&acpi_ioapic_lock);
662 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
663 /* Don't set up the ACPI SCI because it's already set up */
664 if (irq >= 0 && enable_update_mptable &&
665 acpi_gbl_FADT.sci_interrupt != gsi)
666 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
667 mutex_unlock(&acpi_ioapic_lock);
673 static void acpi_unregister_gsi_ioapic(u32 gsi)
675 #ifdef CONFIG_X86_IO_APIC
678 mutex_lock(&acpi_ioapic_lock);
679 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
682 mutex_unlock(&acpi_ioapic_lock);
687 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
688 int trigger, int polarity) = acpi_register_gsi_pic;
689 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
691 #ifdef CONFIG_ACPI_SLEEP
692 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
694 int (*acpi_suspend_lowlevel)(void);
698 * success: return IRQ number (>=0)
699 * failure: return < 0
701 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
703 return __acpi_register_gsi(dev, gsi, trigger, polarity);
705 EXPORT_SYMBOL_GPL(acpi_register_gsi);
707 void acpi_unregister_gsi(u32 gsi)
709 if (__acpi_unregister_gsi)
710 __acpi_unregister_gsi(gsi);
712 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
714 #ifdef CONFIG_X86_LOCAL_APIC
715 static void __init acpi_set_irq_model_ioapic(void)
717 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
718 __acpi_register_gsi = acpi_register_gsi_ioapic;
719 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
725 * ACPI based hotplug support for CPU
727 #ifdef CONFIG_ACPI_HOTPLUG_CPU
728 #include <acpi/processor.h>
730 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
732 #ifdef CONFIG_ACPI_NUMA
735 nid = acpi_get_node(handle);
736 if (nid != NUMA_NO_NODE) {
737 set_apicid_to_node(physid, nid);
738 numa_set_node(cpu, nid);
744 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
749 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED);
751 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
755 acpi_processor_set_pdc(handle);
756 acpi_map_cpu2node(handle, cpu, physid);
761 EXPORT_SYMBOL(acpi_map_cpu);
763 int acpi_unmap_cpu(int cpu)
765 #ifdef CONFIG_ACPI_NUMA
766 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
769 per_cpu(x86_cpu_to_apicid, cpu) = -1;
770 set_cpu_present(cpu, false);
775 EXPORT_SYMBOL(acpi_unmap_cpu);
776 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
778 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
781 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
784 struct ioapic_domain_cfg cfg = {
785 .type = IOAPIC_DOMAIN_DYNAMIC,
786 .ops = &mp_ioapic_irqdomain_ops,
789 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
791 unsigned long long uid;
794 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
796 if (ACPI_FAILURE(status)) {
797 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
800 ioapic_id = (int)uid;
803 mutex_lock(&acpi_ioapic_lock);
804 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
805 mutex_unlock(&acpi_ioapic_lock);
810 EXPORT_SYMBOL(acpi_register_ioapic);
812 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
816 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
817 mutex_lock(&acpi_ioapic_lock);
818 ret = mp_unregister_ioapic(gsi_base);
819 mutex_unlock(&acpi_ioapic_lock);
824 EXPORT_SYMBOL(acpi_unregister_ioapic);
827 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
828 * has been registered
829 * @handle: ACPI handle of the IOAPIC deivce
830 * @gsi_base: GSI base associated with the IOAPIC
832 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
833 * with acpi_register_ioapic()/acpi_unregister_ioapic().
835 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
839 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
840 mutex_lock(&acpi_ioapic_lock);
841 ret = mp_ioapic_registered(gsi_base);
842 mutex_unlock(&acpi_ioapic_lock);
848 static int __init acpi_parse_sbf(struct acpi_table_header *table)
850 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
852 sbf_port = sb->cmos_index; /* Save CMOS port */
857 #ifdef CONFIG_HPET_TIMER
858 #include <asm/hpet.h>
860 static struct resource *hpet_res __initdata;
862 static int __init acpi_parse_hpet(struct acpi_table_header *table)
864 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
866 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
867 printk(KERN_WARNING PREFIX "HPET timers must be located in "
872 hpet_address = hpet_tbl->address.address;
873 hpet_blockid = hpet_tbl->sequence;
876 * Some broken BIOSes advertise HPET at 0x0. We really do not
877 * want to allocate a resource there.
880 printk(KERN_WARNING PREFIX
881 "HPET id: %#x base: %#lx is invalid\n",
882 hpet_tbl->id, hpet_address);
887 * Some even more broken BIOSes advertise HPET at
888 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
891 if (hpet_address == 0xfed0000000000000UL) {
892 if (!hpet_force_user) {
893 printk(KERN_WARNING PREFIX "HPET id: %#x "
894 "base: 0xfed0000000000000 is bogus\n "
895 "try hpet=force on the kernel command line to "
896 "fix it up to 0xfed00000.\n", hpet_tbl->id);
900 printk(KERN_WARNING PREFIX
901 "HPET id: %#x base: 0xfed0000000000000 fixed up "
902 "to 0xfed00000.\n", hpet_tbl->id);
906 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
907 hpet_tbl->id, hpet_address);
910 * Allocate and initialize the HPET firmware resource for adding into
911 * the resource tree during the lateinit timeframe.
913 #define HPET_RESOURCE_NAME_SIZE 9
914 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
916 hpet_res->name = (void *)&hpet_res[1];
917 hpet_res->flags = IORESOURCE_MEM;
918 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
921 hpet_res->start = hpet_address;
922 hpet_res->end = hpet_address + (1 * 1024) - 1;
928 * hpet_insert_resource inserts the HPET resources used into the resource
931 static __init int hpet_insert_resource(void)
936 return insert_resource(&iomem_resource, hpet_res);
939 late_initcall(hpet_insert_resource);
942 #define acpi_parse_hpet NULL
945 static int __init acpi_parse_fadt(struct acpi_table_header *table)
947 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
948 pr_debug("ACPI: no legacy devices present\n");
949 x86_platform.legacy.devices.pnpbios = 0;
952 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
953 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
954 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
955 pr_debug("ACPI: i8042 controller is absent\n");
956 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
959 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
960 pr_debug("ACPI: not registering RTC platform device\n");
961 x86_platform.legacy.rtc = 0;
964 #ifdef CONFIG_X86_PM_TIMER
965 /* detect the location of the ACPI PM Timer */
966 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
968 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
969 ACPI_ADR_SPACE_SYSTEM_IO)
972 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
974 * "X" fields are optional extensions to the original V1.0
975 * fields, so we must selectively expand V1.0 fields if the
976 * corresponding X field is zero.
979 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
982 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
985 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
991 #ifdef CONFIG_X86_LOCAL_APIC
993 * Parse LAPIC entries in MADT
994 * returns 0 on success, < 0 on error
997 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
1001 if (!boot_cpu_has(X86_FEATURE_APIC))
1005 * Note that the LAPIC address is obtained from the MADT (32-bit value)
1006 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
1009 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1010 acpi_parse_lapic_addr_ovr, 0);
1012 printk(KERN_ERR PREFIX
1013 "Error parsing LAPIC address override entry\n");
1017 register_lapic_address(acpi_lapic_addr);
1022 static int __init acpi_parse_madt_lapic_entries(void)
1027 struct acpi_subtable_proc madt_proc[2];
1029 if (!boot_cpu_has(X86_FEATURE_APIC))
1032 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1033 acpi_parse_sapic, MAX_LOCAL_APIC);
1036 memset(madt_proc, 0, sizeof(madt_proc));
1037 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1038 madt_proc[0].handler = acpi_parse_lapic;
1039 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1040 madt_proc[1].handler = acpi_parse_x2apic;
1041 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1042 sizeof(struct acpi_table_madt),
1043 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1045 printk(KERN_ERR PREFIX
1046 "Error parsing LAPIC/X2APIC entries\n");
1050 count = madt_proc[0].count;
1051 x2count = madt_proc[1].count;
1053 if (!count && !x2count) {
1054 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1055 /* TBD: Cleanup to allow fallback to MPS */
1057 } else if (count < 0 || x2count < 0) {
1058 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1059 /* TBD: Cleanup to allow fallback to MPS */
1063 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1064 acpi_parse_x2apic_nmi, 0);
1065 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1066 acpi_parse_lapic_nmi, 0);
1067 if (count < 0 || x2count < 0) {
1068 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1069 /* TBD: Cleanup to allow fallback to MPS */
1074 #endif /* CONFIG_X86_LOCAL_APIC */
1076 #ifdef CONFIG_X86_IO_APIC
1077 static void __init mp_config_acpi_legacy_irqs(void)
1080 struct mpc_intsrc mp_irq;
1084 * Fabricate the legacy ISA bus (bus #31).
1086 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1088 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1089 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs());
1092 * Use the default configuration for the IRQs 0-15. Unless
1093 * overridden by (MADT) interrupt source override entries.
1095 for (i = 0; i < nr_legacy_irqs(); i++) {
1097 unsigned int dstapic;
1101 /* Locate the gsi that irq i maps to. */
1102 if (acpi_isa_irq_to_gsi(i, &gsi))
1106 * Locate the IOAPIC that manages the ISA IRQ.
1108 ioapic = mp_find_ioapic(gsi);
1111 pin = mp_find_ioapic_pin(ioapic, gsi);
1112 dstapic = mpc_ioapic_id(ioapic);
1114 for (idx = 0; idx < mp_irq_entries; idx++) {
1115 struct mpc_intsrc *irq = mp_irqs + idx;
1117 /* Do we already have a mapping for this ISA IRQ? */
1118 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1121 /* Do we already have a mapping for this IOAPIC pin */
1122 if (irq->dstapic == dstapic && irq->dstirq == pin)
1126 if (idx != mp_irq_entries) {
1127 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1128 continue; /* IRQ already used */
1131 mp_irq.type = MP_INTSRC;
1132 mp_irq.irqflag = 0; /* Conforming */
1133 mp_irq.srcbus = MP_ISA_BUS;
1134 mp_irq.dstapic = dstapic;
1135 mp_irq.irqtype = mp_INT;
1136 mp_irq.srcbusirq = i; /* Identity mapped */
1137 mp_irq.dstirq = pin;
1139 mp_save_irq(&mp_irq);
1144 * Parse IOAPIC related entries in MADT
1145 * returns 0 on success, < 0 on error
1147 static int __init acpi_parse_madt_ioapic_entries(void)
1152 * ACPI interpreter is required to complete interrupt setup,
1153 * so if it is off, don't enumerate the io-apics with ACPI.
1154 * If MPS is present, it will handle them,
1155 * otherwise the system will stay in PIC mode
1157 if (acpi_disabled || acpi_noirq)
1160 if (!boot_cpu_has(X86_FEATURE_APIC))
1164 * if "noapic" boot option, don't look for IO-APICs
1166 if (skip_ioapic_setup) {
1167 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1168 "due to 'noapic' option.\n");
1172 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1175 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1177 } else if (count < 0) {
1178 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1182 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1183 acpi_parse_int_src_ovr, nr_irqs);
1185 printk(KERN_ERR PREFIX
1186 "Error parsing interrupt source overrides entry\n");
1187 /* TBD: Cleanup to allow fallback to MPS */
1192 * If BIOS did not supply an INT_SRC_OVR for the SCI
1193 * pretend we got one so we can set the SCI flags.
1195 if (!acpi_sci_override_gsi)
1196 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1197 acpi_gbl_FADT.sci_interrupt);
1199 /* Fill in identity legacy mappings where no override */
1200 mp_config_acpi_legacy_irqs();
1202 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1203 acpi_parse_nmi_src, nr_irqs);
1205 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1206 /* TBD: Cleanup to allow fallback to MPS */
1213 static inline int acpi_parse_madt_ioapic_entries(void)
1217 #endif /* !CONFIG_X86_IO_APIC */
1219 static void __init early_acpi_process_madt(void)
1221 #ifdef CONFIG_X86_LOCAL_APIC
1224 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1227 * Parse MADT LAPIC entries
1229 error = early_acpi_parse_madt_lapic_addr_ovr();
1232 smp_found_config = 1;
1234 if (error == -EINVAL) {
1236 * Dell Precision Workstation 410, 610 come here.
1238 printk(KERN_ERR PREFIX
1239 "Invalid BIOS MADT, disabling ACPI\n");
1246 static void __init acpi_process_madt(void)
1248 #ifdef CONFIG_X86_LOCAL_APIC
1251 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1254 * Parse MADT LAPIC entries
1256 error = acpi_parse_madt_lapic_entries();
1261 * Parse MADT IO-APIC entries
1263 mutex_lock(&acpi_ioapic_lock);
1264 error = acpi_parse_madt_ioapic_entries();
1265 mutex_unlock(&acpi_ioapic_lock);
1267 acpi_set_irq_model_ioapic();
1269 smp_found_config = 1;
1272 if (error == -EINVAL) {
1274 * Dell Precision Workstation 410, 610 come here.
1276 printk(KERN_ERR PREFIX
1277 "Invalid BIOS MADT, disabling ACPI\n");
1282 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1283 * In the event an MPS table was found, forget it.
1284 * Boot with "acpi=off" to use MPS on such a system.
1286 if (smp_found_config) {
1287 printk(KERN_WARNING PREFIX
1288 "No APIC-table, disabling MPS\n");
1289 smp_found_config = 0;
1294 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1295 * processors, where MPS only supports physical.
1297 if (acpi_lapic && acpi_ioapic)
1298 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1300 else if (acpi_lapic)
1301 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1302 "configuration information\n");
1307 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1310 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1317 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1320 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1327 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1330 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1334 "Warning: DMI blacklist says broken, but acpi forced\n");
1340 * Force ignoring BIOS IRQ0 override
1342 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1344 if (!acpi_skip_timer_override) {
1345 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1347 acpi_skip_timer_override = 1;
1353 * ACPI offers an alternative platform interface model that removes
1354 * ACPI hardware requirements for platforms that do not implement
1355 * the PC Architecture.
1357 * We initialize the Hardware-reduced ACPI model here:
1359 static void __init acpi_reduced_hw_init(void)
1361 if (acpi_gbl_reduced_hardware) {
1363 * Override x86_init functions and bypass legacy pic
1364 * in Hardware-reduced ACPI mode
1366 x86_init.timers.timer_init = x86_init_noop;
1367 x86_init.irqs.pre_vector_init = x86_init_noop;
1368 legacy_pic = &null_legacy_pic;
1373 * If your system is blacklisted here, but you find that acpi=force
1374 * works for you, please contact linux-acpi@vger.kernel.org
1376 static const struct dmi_system_id acpi_dmi_table[] __initconst = {
1378 * Boxes that need ACPI disabled
1381 .callback = dmi_disable_acpi,
1382 .ident = "IBM Thinkpad",
1384 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1385 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1390 * Boxes that need ACPI PCI IRQ routing disabled
1393 .callback = disable_acpi_irq,
1394 .ident = "ASUS A7V",
1396 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1397 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1398 /* newer BIOS, Revision 1011, does work */
1399 DMI_MATCH(DMI_BIOS_VERSION,
1400 "ASUS A7V ACPI BIOS Revision 1007"),
1405 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1406 * for LPC bridge, which is needed for the PCI
1407 * interrupt links to work. DSDT fix is in bug 5966.
1408 * 2645, 2646 model numbers are shared with 600/600E/600X
1410 .callback = disable_acpi_irq,
1411 .ident = "IBM Thinkpad 600 Series 2645",
1413 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1414 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1418 .callback = disable_acpi_irq,
1419 .ident = "IBM Thinkpad 600 Series 2646",
1421 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1422 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1426 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1429 .callback = disable_acpi_pci,
1430 .ident = "ASUS PR-DLS",
1432 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1433 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1434 DMI_MATCH(DMI_BIOS_VERSION,
1435 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1436 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1440 .callback = disable_acpi_pci,
1441 .ident = "Acer TravelMate 36x Laptop",
1443 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1444 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1450 /* second table for DMI checks that should run after early-quirks */
1451 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = {
1453 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1454 * which includes some code which overrides all temperature
1455 * trip points to 16C if the INTIN2 input of the I/O APIC
1456 * is enabled. This input is incorrectly designated the
1457 * ISA IRQ 0 via an interrupt source override even though
1458 * it is wired to the output of the master 8259A and INTIN0
1459 * is not connected at all. Force ignoring BIOS IRQ0
1460 * override in that cases.
1463 .callback = dmi_ignore_irq0_timer_override,
1464 .ident = "HP nx6115 laptop",
1466 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1467 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1471 .callback = dmi_ignore_irq0_timer_override,
1472 .ident = "HP NX6125 laptop",
1474 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1475 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1479 .callback = dmi_ignore_irq0_timer_override,
1480 .ident = "HP NX6325 laptop",
1482 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1483 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1487 .callback = dmi_ignore_irq0_timer_override,
1488 .ident = "HP 6715b laptop",
1490 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1491 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1495 .callback = dmi_ignore_irq0_timer_override,
1496 .ident = "FUJITSU SIEMENS",
1498 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1499 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1506 * acpi_boot_table_init() and acpi_boot_init()
1507 * called from setup_arch(), always.
1508 * 1. checksums all tables
1509 * 2. enumerates lapics
1510 * 3. enumerates io-apics
1512 * acpi_table_init() is separate to allow reading SRAT without
1513 * other side effects.
1515 * side effects of acpi_boot_init:
1516 * acpi_lapic = 1 if LAPIC found
1517 * acpi_ioapic = 1 if IOAPIC found
1518 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1519 * if acpi_blacklisted() acpi_disabled = 1;
1520 * acpi_irq_model=...
1524 void __init acpi_boot_table_init(void)
1526 dmi_check_system(acpi_dmi_table);
1529 * If acpi_disabled, bail out
1535 * Initialize the ACPI boot-time table parser.
1537 if (acpi_table_init()) {
1542 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1545 * blacklist may disable ACPI entirely
1547 if (acpi_blacklisted()) {
1549 printk(KERN_WARNING PREFIX "acpi=force override\n");
1551 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1558 int __init early_acpi_boot_init(void)
1561 * If acpi_disabled, bail out
1567 * Process the Multiple APIC Description Table (MADT), if present
1569 early_acpi_process_madt();
1572 * Hardware-reduced ACPI mode initialization:
1574 acpi_reduced_hw_init();
1579 int __init acpi_boot_init(void)
1581 /* those are executed after early-quirks are executed */
1582 dmi_check_system(acpi_dmi_table_late);
1585 * If acpi_disabled, bail out
1590 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1593 * set sci_int and PM timer address
1595 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1598 * Process the Multiple APIC Description Table (MADT), if present
1600 acpi_process_madt();
1602 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1603 if (IS_ENABLED(CONFIG_ACPI_BGRT))
1604 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
1607 x86_init.pci.init = pci_acpi_init;
1612 static int __init parse_acpi(char *arg)
1617 /* "acpi=off" disables both ACPI table parsing and interpreter */
1618 if (strcmp(arg, "off") == 0) {
1621 /* acpi=force to over-ride black-list */
1622 else if (strcmp(arg, "force") == 0) {
1626 /* acpi=strict disables out-of-spec workarounds */
1627 else if (strcmp(arg, "strict") == 0) {
1630 /* acpi=rsdt use RSDT instead of XSDT */
1631 else if (strcmp(arg, "rsdt") == 0) {
1632 acpi_gbl_do_not_use_xsdt = TRUE;
1634 /* "acpi=noirq" disables ACPI interrupt routing */
1635 else if (strcmp(arg, "noirq") == 0) {
1638 /* "acpi=copy_dsdt" copys DSDT */
1639 else if (strcmp(arg, "copy_dsdt") == 0) {
1640 acpi_gbl_copy_dsdt_locally = 1;
1642 /* "acpi=nocmcff" disables FF mode for corrected errors */
1643 else if (strcmp(arg, "nocmcff") == 0) {
1644 acpi_disable_cmcff = 1;
1646 /* Core will printk when we return error. */
1651 early_param("acpi", parse_acpi);
1653 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1654 static int __init parse_pci(char *arg)
1656 if (arg && strcmp(arg, "noacpi") == 0)
1660 early_param("pci", parse_pci);
1662 int __init acpi_mps_check(void)
1664 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1665 /* mptable code is not built-in*/
1666 if (acpi_disabled || acpi_noirq) {
1667 printk(KERN_WARNING "MPS support code is not built-in.\n"
1668 "Using acpi=off or acpi=noirq or pci=noacpi "
1669 "may have problem\n");
1676 #ifdef CONFIG_X86_IO_APIC
1677 static int __init parse_acpi_skip_timer_override(char *arg)
1679 acpi_skip_timer_override = 1;
1682 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1684 static int __init parse_acpi_use_timer_override(char *arg)
1686 acpi_use_timer_override = 1;
1689 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1690 #endif /* CONFIG_X86_IO_APIC */
1692 static int __init setup_acpi_sci(char *s)
1696 if (!strcmp(s, "edge"))
1697 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1698 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1699 else if (!strcmp(s, "level"))
1700 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1701 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1702 else if (!strcmp(s, "high"))
1703 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1704 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1705 else if (!strcmp(s, "low"))
1706 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1707 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1712 early_param("acpi_sci", setup_acpi_sci);
1714 int __acpi_acquire_global_lock(unsigned int *lock)
1716 unsigned int old, new, val;
1719 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1720 val = cmpxchg(lock, old, new);
1721 } while (unlikely (val != old));
1722 return (new < 3) ? -1 : 0;
1725 int __acpi_release_global_lock(unsigned int *lock)
1727 unsigned int old, new, val;
1731 val = cmpxchg(lock, old, new);
1732 } while (unlikely (val != old));
1736 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1738 e820__range_add(addr, size, E820_TYPE_ACPI);
1739 e820__update_table_print();