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 if (madt->flags & ACPI_MADT_PCAT_COMPAT)
160 legacy_pic_pcat_compat();
162 default_acpi_madt_oem_check(madt->header.oem_id,
163 madt->header.oem_table_id);
169 * acpi_register_lapic - register a local apic and generates a logic cpu number
170 * @id: local apic id to register
171 * @acpiid: ACPI id to register
172 * @enabled: this cpu is enabled or not
174 * Returns the logic cpu number which maps to the local apic
176 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
178 unsigned int ver = 0;
181 if (id >= MAX_LOCAL_APIC) {
182 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
191 if (boot_cpu_physical_apicid != -1U)
192 ver = boot_cpu_apic_version;
194 cpu = generic_processor_info(id, ver);
196 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
202 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
204 struct acpi_madt_local_x2apic *processor = NULL;
205 #ifdef CONFIG_X86_X2APIC
210 processor = (struct acpi_madt_local_x2apic *)header;
212 if (BAD_MADT_ENTRY(processor, end))
215 acpi_table_print_madt_entry(header);
217 #ifdef CONFIG_X86_X2APIC
218 apic_id = processor->local_apic_id;
219 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
221 /* Ignore invalid ID */
222 if (apic_id == 0xffffffff)
226 * We need to register disabled CPU as well to permit
227 * counting disabled CPUs. This allows us to size
228 * cpus_possible_map more accurately, to permit
229 * to not preallocating memory for all NR_CPUS
230 * when we use CPU hotplug.
232 if (!apic->apic_id_valid(apic_id) && enabled)
233 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
235 acpi_register_lapic(apic_id, processor->uid, enabled);
237 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
244 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
246 struct acpi_madt_local_apic *processor = NULL;
248 processor = (struct acpi_madt_local_apic *)header;
250 if (BAD_MADT_ENTRY(processor, end))
253 acpi_table_print_madt_entry(header);
255 /* Ignore invalid ID */
256 if (processor->id == 0xff)
260 * We need to register disabled CPU as well to permit
261 * counting disabled CPUs. This allows us to size
262 * cpus_possible_map more accurately, to permit
263 * to not preallocating memory for all NR_CPUS
264 * when we use CPU hotplug.
266 acpi_register_lapic(processor->id, /* APIC ID */
267 processor->processor_id, /* ACPI ID */
268 processor->lapic_flags & ACPI_MADT_ENABLED);
274 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
276 struct acpi_madt_local_sapic *processor = NULL;
278 processor = (struct acpi_madt_local_sapic *)header;
280 if (BAD_MADT_ENTRY(processor, end))
283 acpi_table_print_madt_entry(header);
285 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
286 processor->processor_id, /* ACPI ID */
287 processor->lapic_flags & ACPI_MADT_ENABLED);
293 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
294 const unsigned long end)
296 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
298 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
300 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
303 acpi_table_print_madt_entry(header);
305 acpi_lapic_addr = lapic_addr_ovr->address;
311 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
312 const unsigned long end)
314 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
316 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
318 if (BAD_MADT_ENTRY(x2apic_nmi, end))
321 acpi_table_print_madt_entry(header);
323 if (x2apic_nmi->lint != 1)
324 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
330 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
332 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
334 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
336 if (BAD_MADT_ENTRY(lapic_nmi, end))
339 acpi_table_print_madt_entry(header);
341 if (lapic_nmi->lint != 1)
342 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
347 #endif /*CONFIG_X86_LOCAL_APIC */
349 #ifdef CONFIG_X86_IO_APIC
352 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
353 u8 trigger, u32 gsi);
355 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
359 * Check bus_irq boundary.
361 if (bus_irq >= NR_IRQS_LEGACY) {
362 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq);
367 * TBD: This check is for faulty timer entries, where the override
368 * erroneously sets the trigger to level, resulting in a HUGE
369 * increase of timer interrupts!
371 if ((bus_irq == 0) && (trigger == 3))
374 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0)
377 * Reset default identity mapping if gsi is also an legacy IRQ,
378 * otherwise there will be more than one entry with the same GSI
379 * and acpi_isa_irq_to_gsi() may give wrong result.
381 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
382 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
383 isa_irq_to_gsi[bus_irq] = gsi;
386 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
389 #ifdef CONFIG_X86_MPPARSE
390 struct mpc_intsrc mp_irq;
391 struct pci_dev *pdev;
392 unsigned char number;
399 if (!dev || !dev_is_pci(dev))
402 pdev = to_pci_dev(dev);
403 number = pdev->bus->number;
406 /* print the entry should happen on mptable identically */
407 mp_irq.type = MP_INTSRC;
408 mp_irq.irqtype = mp_INT;
409 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
410 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
411 mp_irq.srcbus = number;
412 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
413 ioapic = mp_find_ioapic(gsi);
414 mp_irq.dstapic = mpc_ioapic_id(ioapic);
415 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
417 mp_save_irq(&mp_irq);
422 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
425 struct mpc_intsrc mp_irq;
428 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */
429 ioapic = mp_find_ioapic(gsi);
431 pr_warn("Failed to find ioapic for gsi : %u\n", gsi);
435 pin = mp_find_ioapic_pin(ioapic, gsi);
437 mp_irq.type = MP_INTSRC;
438 mp_irq.irqtype = mp_INT;
439 mp_irq.irqflag = (trigger << 2) | polarity;
440 mp_irq.srcbus = MP_ISA_BUS;
441 mp_irq.srcbusirq = bus_irq;
442 mp_irq.dstapic = mpc_ioapic_id(ioapic);
445 mp_save_irq(&mp_irq);
451 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
453 struct acpi_madt_io_apic *ioapic = NULL;
454 struct ioapic_domain_cfg cfg = {
455 .type = IOAPIC_DOMAIN_DYNAMIC,
456 .ops = &mp_ioapic_irqdomain_ops,
459 ioapic = (struct acpi_madt_io_apic *)header;
461 if (BAD_MADT_ENTRY(ioapic, end))
464 acpi_table_print_madt_entry(header);
466 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
467 if (ioapic->global_irq_base < nr_legacy_irqs())
468 cfg.type = IOAPIC_DOMAIN_LEGACY;
470 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
477 * Parse Interrupt Source Override for the ACPI SCI
479 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
481 if (trigger == 0) /* compatible SCI trigger is level */
484 if (polarity == 0) /* compatible SCI polarity is low */
487 /* Command-line over-ride via acpi_sci= */
488 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
489 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
491 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
492 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
494 if (bus_irq < NR_IRQS_LEGACY)
495 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
497 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi);
499 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
502 * stash over-ride to indicate we've been here
503 * and for later update of acpi_gbl_FADT
505 acpi_sci_override_gsi = gsi;
510 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
511 const unsigned long end)
513 struct acpi_madt_interrupt_override *intsrc = NULL;
515 intsrc = (struct acpi_madt_interrupt_override *)header;
517 if (BAD_MADT_ENTRY(intsrc, end))
520 acpi_table_print_madt_entry(header);
522 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
523 acpi_sci_ioapic_setup(intsrc->source_irq,
524 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
525 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
530 if (intsrc->source_irq == 0) {
531 if (acpi_skip_timer_override) {
532 printk(PREFIX "BIOS IRQ0 override ignored.\n");
536 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
537 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
538 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
539 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
543 mp_override_legacy_irq(intsrc->source_irq,
544 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
545 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
552 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
554 struct acpi_madt_nmi_source *nmi_src = NULL;
556 nmi_src = (struct acpi_madt_nmi_source *)header;
558 if (BAD_MADT_ENTRY(nmi_src, end))
561 acpi_table_print_madt_entry(header);
563 /* TBD: Support nimsrc entries? */
568 #endif /* CONFIG_X86_IO_APIC */
571 * acpi_pic_sci_set_trigger()
573 * use ELCR to set PIC-mode trigger type for SCI
575 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
576 * it may require Edge Trigger -- use "acpi_sci=edge"
578 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
579 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
580 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
581 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
584 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
586 unsigned int mask = 1 << irq;
587 unsigned int old, new;
589 /* Real old ELCR mask */
590 old = inb(0x4d0) | (inb(0x4d1) << 8);
593 * If we use ACPI to set PCI IRQs, then we should clear ELCR
594 * since we will set it correctly as we enable the PCI irq
597 new = acpi_noirq ? old : 0;
600 * Update SCI information in the ELCR, it isn't in the PCI
604 case 1: /* Edge - clear */
607 case 3: /* Level - set */
615 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
617 outb(new >> 8, 0x4d1);
620 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
622 int rc, irq, trigger, polarity;
624 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
629 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
631 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
632 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
633 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
642 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
644 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
646 if (isa_irq < nr_legacy_irqs() &&
647 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
648 *gsi = isa_irq_to_gsi[isa_irq];
655 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
656 int trigger, int polarity)
660 * Make sure all (legacy) PCI IRQs are set as level-triggered.
662 if (trigger == ACPI_LEVEL_SENSITIVE)
663 elcr_set_level_irq(gsi);
669 #ifdef CONFIG_X86_LOCAL_APIC
670 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
671 int trigger, int polarity)
674 #ifdef CONFIG_X86_IO_APIC
676 struct irq_alloc_info info;
678 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
679 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
680 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
681 ioapic_set_alloc_attr(&info, node, trigger, polarity);
683 mutex_lock(&acpi_ioapic_lock);
684 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
685 /* Don't set up the ACPI SCI because it's already set up */
686 if (irq >= 0 && enable_update_mptable &&
687 acpi_gbl_FADT.sci_interrupt != gsi)
688 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
689 mutex_unlock(&acpi_ioapic_lock);
695 static void acpi_unregister_gsi_ioapic(u32 gsi)
697 #ifdef CONFIG_X86_IO_APIC
700 mutex_lock(&acpi_ioapic_lock);
701 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
704 mutex_unlock(&acpi_ioapic_lock);
709 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
710 int trigger, int polarity) = acpi_register_gsi_pic;
711 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
713 #ifdef CONFIG_ACPI_SLEEP
714 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
716 int (*acpi_suspend_lowlevel)(void);
720 * success: return IRQ number (>=0)
721 * failure: return < 0
723 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
725 return __acpi_register_gsi(dev, gsi, trigger, polarity);
727 EXPORT_SYMBOL_GPL(acpi_register_gsi);
729 void acpi_unregister_gsi(u32 gsi)
731 if (__acpi_unregister_gsi)
732 __acpi_unregister_gsi(gsi);
734 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
736 #ifdef CONFIG_X86_LOCAL_APIC
737 static void __init acpi_set_irq_model_ioapic(void)
739 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
740 __acpi_register_gsi = acpi_register_gsi_ioapic;
741 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
747 * ACPI based hotplug support for CPU
749 #ifdef CONFIG_ACPI_HOTPLUG_CPU
750 #include <acpi/processor.h>
752 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
754 #ifdef CONFIG_ACPI_NUMA
757 nid = acpi_get_node(handle);
758 if (nid != NUMA_NO_NODE) {
759 set_apicid_to_node(physid, nid);
760 numa_set_node(cpu, nid);
766 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
771 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED);
773 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
777 acpi_processor_set_pdc(handle);
778 acpi_map_cpu2node(handle, cpu, physid);
783 EXPORT_SYMBOL(acpi_map_cpu);
785 int acpi_unmap_cpu(int cpu)
787 #ifdef CONFIG_ACPI_NUMA
788 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
791 per_cpu(x86_cpu_to_apicid, cpu) = -1;
792 set_cpu_present(cpu, false);
797 EXPORT_SYMBOL(acpi_unmap_cpu);
798 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
800 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
803 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
806 struct ioapic_domain_cfg cfg = {
807 .type = IOAPIC_DOMAIN_DYNAMIC,
808 .ops = &mp_ioapic_irqdomain_ops,
811 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
813 unsigned long long uid;
816 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
818 if (ACPI_FAILURE(status)) {
819 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
822 ioapic_id = (int)uid;
825 mutex_lock(&acpi_ioapic_lock);
826 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
827 mutex_unlock(&acpi_ioapic_lock);
832 EXPORT_SYMBOL(acpi_register_ioapic);
834 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
838 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
839 mutex_lock(&acpi_ioapic_lock);
840 ret = mp_unregister_ioapic(gsi_base);
841 mutex_unlock(&acpi_ioapic_lock);
846 EXPORT_SYMBOL(acpi_unregister_ioapic);
849 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
850 * has been registered
851 * @handle: ACPI handle of the IOAPIC deivce
852 * @gsi_base: GSI base associated with the IOAPIC
854 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
855 * with acpi_register_ioapic()/acpi_unregister_ioapic().
857 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
861 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
862 mutex_lock(&acpi_ioapic_lock);
863 ret = mp_ioapic_registered(gsi_base);
864 mutex_unlock(&acpi_ioapic_lock);
870 static int __init acpi_parse_sbf(struct acpi_table_header *table)
872 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
874 sbf_port = sb->cmos_index; /* Save CMOS port */
879 #ifdef CONFIG_HPET_TIMER
880 #include <asm/hpet.h>
882 static struct resource *hpet_res __initdata;
884 static int __init acpi_parse_hpet(struct acpi_table_header *table)
886 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
888 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
889 printk(KERN_WARNING PREFIX "HPET timers must be located in "
894 hpet_address = hpet_tbl->address.address;
895 hpet_blockid = hpet_tbl->sequence;
898 * Some broken BIOSes advertise HPET at 0x0. We really do not
899 * want to allocate a resource there.
902 printk(KERN_WARNING PREFIX
903 "HPET id: %#x base: %#lx is invalid\n",
904 hpet_tbl->id, hpet_address);
909 * Some even more broken BIOSes advertise HPET at
910 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
913 if (hpet_address == 0xfed0000000000000UL) {
914 if (!hpet_force_user) {
915 printk(KERN_WARNING PREFIX "HPET id: %#x "
916 "base: 0xfed0000000000000 is bogus\n "
917 "try hpet=force on the kernel command line to "
918 "fix it up to 0xfed00000.\n", hpet_tbl->id);
922 printk(KERN_WARNING PREFIX
923 "HPET id: %#x base: 0xfed0000000000000 fixed up "
924 "to 0xfed00000.\n", hpet_tbl->id);
928 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
929 hpet_tbl->id, hpet_address);
932 * Allocate and initialize the HPET firmware resource for adding into
933 * the resource tree during the lateinit timeframe.
935 #define HPET_RESOURCE_NAME_SIZE 9
936 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
938 hpet_res->name = (void *)&hpet_res[1];
939 hpet_res->flags = IORESOURCE_MEM;
940 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
943 hpet_res->start = hpet_address;
944 hpet_res->end = hpet_address + (1 * 1024) - 1;
950 * hpet_insert_resource inserts the HPET resources used into the resource
953 static __init int hpet_insert_resource(void)
958 return insert_resource(&iomem_resource, hpet_res);
961 late_initcall(hpet_insert_resource);
964 #define acpi_parse_hpet NULL
967 static int __init acpi_parse_fadt(struct acpi_table_header *table)
969 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
970 pr_debug("ACPI: no legacy devices present\n");
971 x86_platform.legacy.devices.pnpbios = 0;
974 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
975 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
976 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
977 pr_debug("ACPI: i8042 controller is absent\n");
978 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
981 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
982 pr_debug("ACPI: not registering RTC platform device\n");
983 x86_platform.legacy.rtc = 0;
986 #ifdef CONFIG_X86_PM_TIMER
987 /* detect the location of the ACPI PM Timer */
988 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
990 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
991 ACPI_ADR_SPACE_SYSTEM_IO)
994 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
996 * "X" fields are optional extensions to the original V1.0
997 * fields, so we must selectively expand V1.0 fields if the
998 * corresponding X field is zero.
1001 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
1004 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
1007 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
1013 #ifdef CONFIG_X86_LOCAL_APIC
1015 * Parse LAPIC entries in MADT
1016 * returns 0 on success, < 0 on error
1019 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
1023 if (!boot_cpu_has(X86_FEATURE_APIC))
1027 * Note that the LAPIC address is obtained from the MADT (32-bit value)
1028 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
1031 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1032 acpi_parse_lapic_addr_ovr, 0);
1034 printk(KERN_ERR PREFIX
1035 "Error parsing LAPIC address override entry\n");
1039 register_lapic_address(acpi_lapic_addr);
1044 static int __init acpi_parse_madt_lapic_entries(void)
1049 struct acpi_subtable_proc madt_proc[2];
1051 if (!boot_cpu_has(X86_FEATURE_APIC))
1054 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1055 acpi_parse_sapic, MAX_LOCAL_APIC);
1058 memset(madt_proc, 0, sizeof(madt_proc));
1059 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1060 madt_proc[0].handler = acpi_parse_lapic;
1061 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1062 madt_proc[1].handler = acpi_parse_x2apic;
1063 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1064 sizeof(struct acpi_table_madt),
1065 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1067 printk(KERN_ERR PREFIX
1068 "Error parsing LAPIC/X2APIC entries\n");
1072 count = madt_proc[0].count;
1073 x2count = madt_proc[1].count;
1075 if (!count && !x2count) {
1076 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1077 /* TBD: Cleanup to allow fallback to MPS */
1079 } else if (count < 0 || x2count < 0) {
1080 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1081 /* TBD: Cleanup to allow fallback to MPS */
1085 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1086 acpi_parse_x2apic_nmi, 0);
1087 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1088 acpi_parse_lapic_nmi, 0);
1089 if (count < 0 || x2count < 0) {
1090 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1091 /* TBD: Cleanup to allow fallback to MPS */
1096 #endif /* CONFIG_X86_LOCAL_APIC */
1098 #ifdef CONFIG_X86_IO_APIC
1099 static void __init mp_config_acpi_legacy_irqs(void)
1102 struct mpc_intsrc mp_irq;
1106 * Fabricate the legacy ISA bus (bus #31).
1108 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1110 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1111 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs());
1114 * Use the default configuration for the IRQs 0-15. Unless
1115 * overridden by (MADT) interrupt source override entries.
1117 for (i = 0; i < nr_legacy_irqs(); i++) {
1119 unsigned int dstapic;
1123 /* Locate the gsi that irq i maps to. */
1124 if (acpi_isa_irq_to_gsi(i, &gsi))
1128 * Locate the IOAPIC that manages the ISA IRQ.
1130 ioapic = mp_find_ioapic(gsi);
1133 pin = mp_find_ioapic_pin(ioapic, gsi);
1134 dstapic = mpc_ioapic_id(ioapic);
1136 for (idx = 0; idx < mp_irq_entries; idx++) {
1137 struct mpc_intsrc *irq = mp_irqs + idx;
1139 /* Do we already have a mapping for this ISA IRQ? */
1140 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1143 /* Do we already have a mapping for this IOAPIC pin */
1144 if (irq->dstapic == dstapic && irq->dstirq == pin)
1148 if (idx != mp_irq_entries) {
1149 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1150 continue; /* IRQ already used */
1153 mp_irq.type = MP_INTSRC;
1154 mp_irq.irqflag = 0; /* Conforming */
1155 mp_irq.srcbus = MP_ISA_BUS;
1156 mp_irq.dstapic = dstapic;
1157 mp_irq.irqtype = mp_INT;
1158 mp_irq.srcbusirq = i; /* Identity mapped */
1159 mp_irq.dstirq = pin;
1161 mp_save_irq(&mp_irq);
1166 * Parse IOAPIC related entries in MADT
1167 * returns 0 on success, < 0 on error
1169 static int __init acpi_parse_madt_ioapic_entries(void)
1174 * ACPI interpreter is required to complete interrupt setup,
1175 * so if it is off, don't enumerate the io-apics with ACPI.
1176 * If MPS is present, it will handle them,
1177 * otherwise the system will stay in PIC mode
1179 if (acpi_disabled || acpi_noirq)
1182 if (!boot_cpu_has(X86_FEATURE_APIC))
1186 * if "noapic" boot option, don't look for IO-APICs
1188 if (skip_ioapic_setup) {
1189 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1190 "due to 'noapic' option.\n");
1194 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1197 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1199 } else if (count < 0) {
1200 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1204 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1205 acpi_parse_int_src_ovr, nr_irqs);
1207 printk(KERN_ERR PREFIX
1208 "Error parsing interrupt source overrides entry\n");
1209 /* TBD: Cleanup to allow fallback to MPS */
1214 * If BIOS did not supply an INT_SRC_OVR for the SCI
1215 * pretend we got one so we can set the SCI flags.
1217 if (!acpi_sci_override_gsi)
1218 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1219 acpi_gbl_FADT.sci_interrupt);
1221 /* Fill in identity legacy mappings where no override */
1222 mp_config_acpi_legacy_irqs();
1224 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1225 acpi_parse_nmi_src, nr_irqs);
1227 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1228 /* TBD: Cleanup to allow fallback to MPS */
1235 static inline int acpi_parse_madt_ioapic_entries(void)
1239 #endif /* !CONFIG_X86_IO_APIC */
1241 static void __init early_acpi_process_madt(void)
1243 #ifdef CONFIG_X86_LOCAL_APIC
1246 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1249 * Parse MADT LAPIC entries
1251 error = early_acpi_parse_madt_lapic_addr_ovr();
1254 smp_found_config = 1;
1256 if (error == -EINVAL) {
1258 * Dell Precision Workstation 410, 610 come here.
1260 printk(KERN_ERR PREFIX
1261 "Invalid BIOS MADT, disabling ACPI\n");
1268 static void __init acpi_process_madt(void)
1270 #ifdef CONFIG_X86_LOCAL_APIC
1273 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1276 * Parse MADT LAPIC entries
1278 error = acpi_parse_madt_lapic_entries();
1283 * Parse MADT IO-APIC entries
1285 mutex_lock(&acpi_ioapic_lock);
1286 error = acpi_parse_madt_ioapic_entries();
1287 mutex_unlock(&acpi_ioapic_lock);
1289 acpi_set_irq_model_ioapic();
1291 smp_found_config = 1;
1294 if (error == -EINVAL) {
1296 * Dell Precision Workstation 410, 610 come here.
1298 printk(KERN_ERR PREFIX
1299 "Invalid BIOS MADT, disabling ACPI\n");
1304 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1305 * In the event an MPS table was found, forget it.
1306 * Boot with "acpi=off" to use MPS on such a system.
1308 if (smp_found_config) {
1309 printk(KERN_WARNING PREFIX
1310 "No APIC-table, disabling MPS\n");
1311 smp_found_config = 0;
1316 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1317 * processors, where MPS only supports physical.
1319 if (acpi_lapic && acpi_ioapic)
1320 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1322 else if (acpi_lapic)
1323 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1324 "configuration information\n");
1329 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1332 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1339 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1342 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1349 static int __init disable_acpi_xsdt(const struct dmi_system_id *d)
1352 pr_notice("%s detected: force use of acpi=rsdt\n", d->ident);
1353 acpi_gbl_do_not_use_xsdt = TRUE;
1355 pr_notice("Warning: DMI blacklist says broken, but acpi XSDT forced\n");
1360 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1363 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1367 "Warning: DMI blacklist says broken, but acpi forced\n");
1373 * Force ignoring BIOS IRQ0 override
1375 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1377 if (!acpi_skip_timer_override) {
1378 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1380 acpi_skip_timer_override = 1;
1386 * ACPI offers an alternative platform interface model that removes
1387 * ACPI hardware requirements for platforms that do not implement
1388 * the PC Architecture.
1390 * We initialize the Hardware-reduced ACPI model here:
1392 static void __init acpi_reduced_hw_init(void)
1394 if (acpi_gbl_reduced_hardware) {
1396 * Override x86_init functions and bypass legacy pic
1397 * in Hardware-reduced ACPI mode
1399 x86_init.timers.timer_init = x86_init_noop;
1400 x86_init.irqs.pre_vector_init = x86_init_noop;
1401 legacy_pic = &null_legacy_pic;
1406 * If your system is blacklisted here, but you find that acpi=force
1407 * works for you, please contact linux-acpi@vger.kernel.org
1409 static const struct dmi_system_id acpi_dmi_table[] __initconst = {
1411 * Boxes that need ACPI disabled
1414 .callback = dmi_disable_acpi,
1415 .ident = "IBM Thinkpad",
1417 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1418 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1423 * Boxes that need ACPI PCI IRQ routing disabled
1426 .callback = disable_acpi_irq,
1427 .ident = "ASUS A7V",
1429 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1430 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1431 /* newer BIOS, Revision 1011, does work */
1432 DMI_MATCH(DMI_BIOS_VERSION,
1433 "ASUS A7V ACPI BIOS Revision 1007"),
1438 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1439 * for LPC bridge, which is needed for the PCI
1440 * interrupt links to work. DSDT fix is in bug 5966.
1441 * 2645, 2646 model numbers are shared with 600/600E/600X
1443 .callback = disable_acpi_irq,
1444 .ident = "IBM Thinkpad 600 Series 2645",
1446 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1447 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1451 .callback = disable_acpi_irq,
1452 .ident = "IBM Thinkpad 600 Series 2646",
1454 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1455 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1459 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1462 .callback = disable_acpi_pci,
1463 .ident = "ASUS PR-DLS",
1465 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1466 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1467 DMI_MATCH(DMI_BIOS_VERSION,
1468 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1469 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1473 .callback = disable_acpi_pci,
1474 .ident = "Acer TravelMate 36x Laptop",
1476 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1477 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1481 * Boxes that need ACPI XSDT use disabled due to corrupted tables
1484 .callback = disable_acpi_xsdt,
1485 .ident = "Advantech DAC-BJ01",
1487 DMI_MATCH(DMI_SYS_VENDOR, "NEC"),
1488 DMI_MATCH(DMI_PRODUCT_NAME, "Bearlake CRB Board"),
1489 DMI_MATCH(DMI_BIOS_VERSION, "V1.12"),
1490 DMI_MATCH(DMI_BIOS_DATE, "02/01/2011"),
1496 /* second table for DMI checks that should run after early-quirks */
1497 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = {
1499 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1500 * which includes some code which overrides all temperature
1501 * trip points to 16C if the INTIN2 input of the I/O APIC
1502 * is enabled. This input is incorrectly designated the
1503 * ISA IRQ 0 via an interrupt source override even though
1504 * it is wired to the output of the master 8259A and INTIN0
1505 * is not connected at all. Force ignoring BIOS IRQ0
1506 * override in that cases.
1509 .callback = dmi_ignore_irq0_timer_override,
1510 .ident = "HP nx6115 laptop",
1512 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1513 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1517 .callback = dmi_ignore_irq0_timer_override,
1518 .ident = "HP NX6125 laptop",
1520 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1521 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1525 .callback = dmi_ignore_irq0_timer_override,
1526 .ident = "HP NX6325 laptop",
1528 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1529 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1533 .callback = dmi_ignore_irq0_timer_override,
1534 .ident = "HP 6715b laptop",
1536 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1537 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1541 .callback = dmi_ignore_irq0_timer_override,
1542 .ident = "FUJITSU SIEMENS",
1544 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1545 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1552 * acpi_boot_table_init() and acpi_boot_init()
1553 * called from setup_arch(), always.
1554 * 1. checksums all tables
1555 * 2. enumerates lapics
1556 * 3. enumerates io-apics
1558 * acpi_table_init() is separate to allow reading SRAT without
1559 * other side effects.
1561 * side effects of acpi_boot_init:
1562 * acpi_lapic = 1 if LAPIC found
1563 * acpi_ioapic = 1 if IOAPIC found
1564 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1565 * if acpi_blacklisted() acpi_disabled = 1;
1566 * acpi_irq_model=...
1570 void __init acpi_boot_table_init(void)
1572 dmi_check_system(acpi_dmi_table);
1575 * If acpi_disabled, bail out
1581 * Initialize the ACPI boot-time table parser.
1583 if (acpi_locate_initial_tables())
1586 acpi_reserve_initial_tables();
1589 int __init early_acpi_boot_init(void)
1594 acpi_table_init_complete();
1596 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1599 * blacklist may disable ACPI entirely
1601 if (acpi_blacklisted()) {
1603 printk(KERN_WARNING PREFIX "acpi=force override\n");
1605 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1612 * Process the Multiple APIC Description Table (MADT), if present
1614 early_acpi_process_madt();
1617 * Hardware-reduced ACPI mode initialization:
1619 acpi_reduced_hw_init();
1624 int __init acpi_boot_init(void)
1626 /* those are executed after early-quirks are executed */
1627 dmi_check_system(acpi_dmi_table_late);
1630 * If acpi_disabled, bail out
1635 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1638 * set sci_int and PM timer address
1640 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1643 * Process the Multiple APIC Description Table (MADT), if present
1645 acpi_process_madt();
1647 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1648 if (IS_ENABLED(CONFIG_ACPI_BGRT))
1649 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
1652 x86_init.pci.init = pci_acpi_init;
1657 static int __init parse_acpi(char *arg)
1662 /* "acpi=off" disables both ACPI table parsing and interpreter */
1663 if (strcmp(arg, "off") == 0) {
1666 /* acpi=force to over-ride black-list */
1667 else if (strcmp(arg, "force") == 0) {
1671 /* acpi=strict disables out-of-spec workarounds */
1672 else if (strcmp(arg, "strict") == 0) {
1675 /* acpi=rsdt use RSDT instead of XSDT */
1676 else if (strcmp(arg, "rsdt") == 0) {
1677 acpi_gbl_do_not_use_xsdt = TRUE;
1679 /* "acpi=noirq" disables ACPI interrupt routing */
1680 else if (strcmp(arg, "noirq") == 0) {
1683 /* "acpi=copy_dsdt" copys DSDT */
1684 else if (strcmp(arg, "copy_dsdt") == 0) {
1685 acpi_gbl_copy_dsdt_locally = 1;
1687 /* "acpi=nocmcff" disables FF mode for corrected errors */
1688 else if (strcmp(arg, "nocmcff") == 0) {
1689 acpi_disable_cmcff = 1;
1691 /* Core will printk when we return error. */
1696 early_param("acpi", parse_acpi);
1698 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1699 static int __init parse_pci(char *arg)
1701 if (arg && strcmp(arg, "noacpi") == 0)
1705 early_param("pci", parse_pci);
1707 int __init acpi_mps_check(void)
1709 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1710 /* mptable code is not built-in*/
1711 if (acpi_disabled || acpi_noirq) {
1712 printk(KERN_WARNING "MPS support code is not built-in.\n"
1713 "Using acpi=off or acpi=noirq or pci=noacpi "
1714 "may have problem\n");
1721 #ifdef CONFIG_X86_IO_APIC
1722 static int __init parse_acpi_skip_timer_override(char *arg)
1724 acpi_skip_timer_override = 1;
1727 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1729 static int __init parse_acpi_use_timer_override(char *arg)
1731 acpi_use_timer_override = 1;
1734 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1735 #endif /* CONFIG_X86_IO_APIC */
1737 static int __init setup_acpi_sci(char *s)
1741 if (!strcmp(s, "edge"))
1742 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1743 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1744 else if (!strcmp(s, "level"))
1745 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1746 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1747 else if (!strcmp(s, "high"))
1748 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1749 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1750 else if (!strcmp(s, "low"))
1751 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1752 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1757 early_param("acpi_sci", setup_acpi_sci);
1759 int __acpi_acquire_global_lock(unsigned int *lock)
1761 unsigned int old, new, val;
1764 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1765 val = cmpxchg(lock, old, new);
1766 } while (unlikely (val != old));
1767 return ((new & 0x3) < 3) ? -1 : 0;
1770 int __acpi_release_global_lock(unsigned int *lock)
1772 unsigned int old, new, val;
1776 val = cmpxchg(lock, old, new);
1777 } while (unlikely (val != old));
1781 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1783 e820__range_add(addr, size, E820_TYPE_ACPI);
1784 e820__update_table_print();