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");
184 if (!apic_id_disabled(id))
189 if (boot_cpu_physical_apicid != -1U)
190 ver = boot_cpu_apic_version;
192 cpu = generic_processor_info(id, ver);
194 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
200 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
202 struct acpi_madt_local_x2apic *processor = NULL;
203 #ifdef CONFIG_X86_X2APIC
208 processor = (struct acpi_madt_local_x2apic *)header;
210 if (BAD_MADT_ENTRY(processor, end))
213 acpi_table_print_madt_entry(header);
215 #ifdef CONFIG_X86_X2APIC
216 apic_id = processor->local_apic_id;
217 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
219 /* Ignore invalid ID */
220 if (apic_id == 0xffffffff)
224 * We need to register disabled CPU as well to permit
225 * counting disabled CPUs. This allows us to size
226 * cpus_possible_map more accurately, to permit
227 * to not preallocating memory for all NR_CPUS
228 * when we use CPU hotplug.
230 if (!apic->apic_id_valid(apic_id) && enabled)
231 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
233 acpi_register_lapic(apic_id, processor->uid, enabled);
235 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
242 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
244 struct acpi_madt_local_apic *processor = NULL;
246 processor = (struct acpi_madt_local_apic *)header;
248 if (BAD_MADT_ENTRY(processor, end))
251 acpi_table_print_madt_entry(header);
253 /* Ignore invalid ID */
254 if (processor->id == 0xff)
258 * We need to register disabled CPU as well to permit
259 * counting disabled CPUs. This allows us to size
260 * cpus_possible_map more accurately, to permit
261 * to not preallocating memory for all NR_CPUS
262 * when we use CPU hotplug.
264 acpi_register_lapic(processor->id, /* APIC ID */
265 processor->processor_id, /* ACPI ID */
266 processor->lapic_flags & ACPI_MADT_ENABLED);
272 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
274 struct acpi_madt_local_sapic *processor = NULL;
276 processor = (struct acpi_madt_local_sapic *)header;
278 if (BAD_MADT_ENTRY(processor, end))
281 acpi_table_print_madt_entry(header);
283 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
284 processor->processor_id, /* ACPI ID */
285 processor->lapic_flags & ACPI_MADT_ENABLED);
291 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
292 const unsigned long end)
294 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
296 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
298 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
301 acpi_table_print_madt_entry(header);
303 acpi_lapic_addr = lapic_addr_ovr->address;
309 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
310 const unsigned long end)
312 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
314 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
316 if (BAD_MADT_ENTRY(x2apic_nmi, end))
319 acpi_table_print_madt_entry(header);
321 if (x2apic_nmi->lint != 1)
322 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
328 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
330 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
332 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
334 if (BAD_MADT_ENTRY(lapic_nmi, end))
337 acpi_table_print_madt_entry(header);
339 if (lapic_nmi->lint != 1)
340 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
345 #endif /*CONFIG_X86_LOCAL_APIC */
347 #ifdef CONFIG_X86_IO_APIC
350 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
351 u8 trigger, u32 gsi);
353 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
357 * Check bus_irq boundary.
359 if (bus_irq >= NR_IRQS_LEGACY) {
360 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq);
365 * TBD: This check is for faulty timer entries, where the override
366 * erroneously sets the trigger to level, resulting in a HUGE
367 * increase of timer interrupts!
369 if ((bus_irq == 0) && (trigger == 3))
372 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0)
375 * Reset default identity mapping if gsi is also an legacy IRQ,
376 * otherwise there will be more than one entry with the same GSI
377 * and acpi_isa_irq_to_gsi() may give wrong result.
379 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
380 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
381 isa_irq_to_gsi[bus_irq] = gsi;
384 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
387 #ifdef CONFIG_X86_MPPARSE
388 struct mpc_intsrc mp_irq;
389 struct pci_dev *pdev;
390 unsigned char number;
397 if (!dev || !dev_is_pci(dev))
400 pdev = to_pci_dev(dev);
401 number = pdev->bus->number;
404 /* print the entry should happen on mptable identically */
405 mp_irq.type = MP_INTSRC;
406 mp_irq.irqtype = mp_INT;
407 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
408 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
409 mp_irq.srcbus = number;
410 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
411 ioapic = mp_find_ioapic(gsi);
412 mp_irq.dstapic = mpc_ioapic_id(ioapic);
413 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
415 mp_save_irq(&mp_irq);
420 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
423 struct mpc_intsrc mp_irq;
426 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */
427 ioapic = mp_find_ioapic(gsi);
429 pr_warn("Failed to find ioapic for gsi : %u\n", gsi);
433 pin = mp_find_ioapic_pin(ioapic, gsi);
435 mp_irq.type = MP_INTSRC;
436 mp_irq.irqtype = mp_INT;
437 mp_irq.irqflag = (trigger << 2) | polarity;
438 mp_irq.srcbus = MP_ISA_BUS;
439 mp_irq.srcbusirq = bus_irq;
440 mp_irq.dstapic = mpc_ioapic_id(ioapic);
443 mp_save_irq(&mp_irq);
449 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
451 struct acpi_madt_io_apic *ioapic = NULL;
452 struct ioapic_domain_cfg cfg = {
453 .type = IOAPIC_DOMAIN_DYNAMIC,
454 .ops = &mp_ioapic_irqdomain_ops,
457 ioapic = (struct acpi_madt_io_apic *)header;
459 if (BAD_MADT_ENTRY(ioapic, end))
462 acpi_table_print_madt_entry(header);
464 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
465 if (ioapic->global_irq_base < nr_legacy_irqs())
466 cfg.type = IOAPIC_DOMAIN_LEGACY;
468 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
475 * Parse Interrupt Source Override for the ACPI SCI
477 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
479 if (trigger == 0) /* compatible SCI trigger is level */
482 if (polarity == 0) /* compatible SCI polarity is low */
485 /* Command-line over-ride via acpi_sci= */
486 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
487 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
489 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
490 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
492 if (bus_irq < NR_IRQS_LEGACY)
493 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
495 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi);
497 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
500 * stash over-ride to indicate we've been here
501 * and for later update of acpi_gbl_FADT
503 acpi_sci_override_gsi = gsi;
508 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
509 const unsigned long end)
511 struct acpi_madt_interrupt_override *intsrc = NULL;
513 intsrc = (struct acpi_madt_interrupt_override *)header;
515 if (BAD_MADT_ENTRY(intsrc, end))
518 acpi_table_print_madt_entry(header);
520 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
521 acpi_sci_ioapic_setup(intsrc->source_irq,
522 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
523 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
528 if (intsrc->source_irq == 0) {
529 if (acpi_skip_timer_override) {
530 printk(PREFIX "BIOS IRQ0 override ignored.\n");
534 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
535 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
536 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
537 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
541 mp_override_legacy_irq(intsrc->source_irq,
542 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
543 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
550 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
552 struct acpi_madt_nmi_source *nmi_src = NULL;
554 nmi_src = (struct acpi_madt_nmi_source *)header;
556 if (BAD_MADT_ENTRY(nmi_src, end))
559 acpi_table_print_madt_entry(header);
561 /* TBD: Support nimsrc entries? */
566 #endif /* CONFIG_X86_IO_APIC */
569 * acpi_pic_sci_set_trigger()
571 * use ELCR to set PIC-mode trigger type for SCI
573 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
574 * it may require Edge Trigger -- use "acpi_sci=edge"
576 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
577 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
578 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
579 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
582 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
584 unsigned int mask = 1 << irq;
585 unsigned int old, new;
587 /* Real old ELCR mask */
588 old = inb(0x4d0) | (inb(0x4d1) << 8);
591 * If we use ACPI to set PCI IRQs, then we should clear ELCR
592 * since we will set it correctly as we enable the PCI irq
595 new = acpi_noirq ? old : 0;
598 * Update SCI information in the ELCR, it isn't in the PCI
602 case 1: /* Edge - clear */
605 case 3: /* Level - set */
613 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
615 outb(new >> 8, 0x4d1);
618 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
620 int rc, irq, trigger, polarity;
622 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
627 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
629 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
630 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
631 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
640 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
642 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
644 if (isa_irq < nr_legacy_irqs() &&
645 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
646 *gsi = isa_irq_to_gsi[isa_irq];
653 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
654 int trigger, int polarity)
658 * Make sure all (legacy) PCI IRQs are set as level-triggered.
660 if (trigger == ACPI_LEVEL_SENSITIVE)
661 elcr_set_level_irq(gsi);
667 #ifdef CONFIG_X86_LOCAL_APIC
668 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
669 int trigger, int polarity)
672 #ifdef CONFIG_X86_IO_APIC
674 struct irq_alloc_info info;
676 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
677 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
678 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
679 ioapic_set_alloc_attr(&info, node, trigger, polarity);
681 mutex_lock(&acpi_ioapic_lock);
682 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
683 /* Don't set up the ACPI SCI because it's already set up */
684 if (irq >= 0 && enable_update_mptable &&
685 acpi_gbl_FADT.sci_interrupt != gsi)
686 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
687 mutex_unlock(&acpi_ioapic_lock);
693 static void acpi_unregister_gsi_ioapic(u32 gsi)
695 #ifdef CONFIG_X86_IO_APIC
698 mutex_lock(&acpi_ioapic_lock);
699 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
702 mutex_unlock(&acpi_ioapic_lock);
707 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
708 int trigger, int polarity) = acpi_register_gsi_pic;
709 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
711 #ifdef CONFIG_ACPI_SLEEP
712 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
714 int (*acpi_suspend_lowlevel)(void);
718 * success: return IRQ number (>=0)
719 * failure: return < 0
721 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
723 return __acpi_register_gsi(dev, gsi, trigger, polarity);
725 EXPORT_SYMBOL_GPL(acpi_register_gsi);
727 void acpi_unregister_gsi(u32 gsi)
729 if (__acpi_unregister_gsi)
730 __acpi_unregister_gsi(gsi);
732 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
734 #ifdef CONFIG_X86_LOCAL_APIC
735 static void __init acpi_set_irq_model_ioapic(void)
737 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
738 __acpi_register_gsi = acpi_register_gsi_ioapic;
739 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
745 * ACPI based hotplug support for CPU
747 #ifdef CONFIG_ACPI_HOTPLUG_CPU
748 #include <acpi/processor.h>
750 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
752 #ifdef CONFIG_ACPI_NUMA
755 nid = acpi_get_node(handle);
756 if (nid != NUMA_NO_NODE) {
757 set_apicid_to_node(physid, nid);
758 numa_set_node(cpu, nid);
764 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
769 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED);
771 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
775 acpi_processor_set_pdc(handle);
776 acpi_map_cpu2node(handle, cpu, physid);
781 EXPORT_SYMBOL(acpi_map_cpu);
783 int acpi_unmap_cpu(int cpu)
785 #ifdef CONFIG_ACPI_NUMA
786 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
789 per_cpu(x86_cpu_to_apicid, cpu) = -1;
790 set_cpu_present(cpu, false);
795 EXPORT_SYMBOL(acpi_unmap_cpu);
796 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
798 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
801 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
804 struct ioapic_domain_cfg cfg = {
805 .type = IOAPIC_DOMAIN_DYNAMIC,
806 .ops = &mp_ioapic_irqdomain_ops,
809 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
811 unsigned long long uid;
814 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
816 if (ACPI_FAILURE(status)) {
817 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
820 ioapic_id = (int)uid;
823 mutex_lock(&acpi_ioapic_lock);
824 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
825 mutex_unlock(&acpi_ioapic_lock);
830 EXPORT_SYMBOL(acpi_register_ioapic);
832 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
836 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
837 mutex_lock(&acpi_ioapic_lock);
838 ret = mp_unregister_ioapic(gsi_base);
839 mutex_unlock(&acpi_ioapic_lock);
844 EXPORT_SYMBOL(acpi_unregister_ioapic);
847 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
848 * has been registered
849 * @handle: ACPI handle of the IOAPIC deivce
850 * @gsi_base: GSI base associated with the IOAPIC
852 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
853 * with acpi_register_ioapic()/acpi_unregister_ioapic().
855 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
859 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
860 mutex_lock(&acpi_ioapic_lock);
861 ret = mp_ioapic_registered(gsi_base);
862 mutex_unlock(&acpi_ioapic_lock);
868 static int __init acpi_parse_sbf(struct acpi_table_header *table)
870 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
872 sbf_port = sb->cmos_index; /* Save CMOS port */
877 #ifdef CONFIG_HPET_TIMER
878 #include <asm/hpet.h>
880 static struct resource *hpet_res __initdata;
882 static int __init acpi_parse_hpet(struct acpi_table_header *table)
884 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
886 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
887 printk(KERN_WARNING PREFIX "HPET timers must be located in "
892 hpet_address = hpet_tbl->address.address;
893 hpet_blockid = hpet_tbl->sequence;
896 * Some broken BIOSes advertise HPET at 0x0. We really do not
897 * want to allocate a resource there.
900 printk(KERN_WARNING PREFIX
901 "HPET id: %#x base: %#lx is invalid\n",
902 hpet_tbl->id, hpet_address);
907 * Some even more broken BIOSes advertise HPET at
908 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
911 if (hpet_address == 0xfed0000000000000UL) {
912 if (!hpet_force_user) {
913 printk(KERN_WARNING PREFIX "HPET id: %#x "
914 "base: 0xfed0000000000000 is bogus\n "
915 "try hpet=force on the kernel command line to "
916 "fix it up to 0xfed00000.\n", hpet_tbl->id);
920 printk(KERN_WARNING PREFIX
921 "HPET id: %#x base: 0xfed0000000000000 fixed up "
922 "to 0xfed00000.\n", hpet_tbl->id);
926 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
927 hpet_tbl->id, hpet_address);
930 * Allocate and initialize the HPET firmware resource for adding into
931 * the resource tree during the lateinit timeframe.
933 #define HPET_RESOURCE_NAME_SIZE 9
934 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
936 hpet_res->name = (void *)&hpet_res[1];
937 hpet_res->flags = IORESOURCE_MEM;
938 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
941 hpet_res->start = hpet_address;
942 hpet_res->end = hpet_address + (1 * 1024) - 1;
948 * hpet_insert_resource inserts the HPET resources used into the resource
951 static __init int hpet_insert_resource(void)
956 return insert_resource(&iomem_resource, hpet_res);
959 late_initcall(hpet_insert_resource);
962 #define acpi_parse_hpet NULL
965 static int __init acpi_parse_fadt(struct acpi_table_header *table)
967 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
968 pr_debug("ACPI: no legacy devices present\n");
969 x86_platform.legacy.devices.pnpbios = 0;
972 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
973 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
974 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
975 pr_debug("ACPI: i8042 controller is absent\n");
976 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
979 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
980 pr_debug("ACPI: not registering RTC platform device\n");
981 x86_platform.legacy.rtc = 0;
984 #ifdef CONFIG_X86_PM_TIMER
985 /* detect the location of the ACPI PM Timer */
986 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
988 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
989 ACPI_ADR_SPACE_SYSTEM_IO)
992 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
994 * "X" fields are optional extensions to the original V1.0
995 * fields, so we must selectively expand V1.0 fields if the
996 * corresponding X field is zero.
999 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
1002 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
1005 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
1011 #ifdef CONFIG_X86_LOCAL_APIC
1013 * Parse LAPIC entries in MADT
1014 * returns 0 on success, < 0 on error
1017 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
1021 if (!boot_cpu_has(X86_FEATURE_APIC))
1025 * Note that the LAPIC address is obtained from the MADT (32-bit value)
1026 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
1029 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1030 acpi_parse_lapic_addr_ovr, 0);
1032 printk(KERN_ERR PREFIX
1033 "Error parsing LAPIC address override entry\n");
1037 register_lapic_address(acpi_lapic_addr);
1042 static int __init acpi_parse_madt_lapic_entries(void)
1047 struct acpi_subtable_proc madt_proc[2];
1049 if (!boot_cpu_has(X86_FEATURE_APIC))
1052 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1053 acpi_parse_sapic, MAX_LOCAL_APIC);
1056 memset(madt_proc, 0, sizeof(madt_proc));
1057 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1058 madt_proc[0].handler = acpi_parse_lapic;
1059 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1060 madt_proc[1].handler = acpi_parse_x2apic;
1061 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1062 sizeof(struct acpi_table_madt),
1063 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1065 printk(KERN_ERR PREFIX
1066 "Error parsing LAPIC/X2APIC entries\n");
1070 count = madt_proc[0].count;
1071 x2count = madt_proc[1].count;
1073 if (!count && !x2count) {
1074 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1075 /* TBD: Cleanup to allow fallback to MPS */
1077 } else if (count < 0 || x2count < 0) {
1078 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1079 /* TBD: Cleanup to allow fallback to MPS */
1083 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1084 acpi_parse_x2apic_nmi, 0);
1085 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1086 acpi_parse_lapic_nmi, 0);
1087 if (count < 0 || x2count < 0) {
1088 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1089 /* TBD: Cleanup to allow fallback to MPS */
1094 #endif /* CONFIG_X86_LOCAL_APIC */
1096 #ifdef CONFIG_X86_IO_APIC
1097 static void __init mp_config_acpi_legacy_irqs(void)
1100 struct mpc_intsrc mp_irq;
1104 * Fabricate the legacy ISA bus (bus #31).
1106 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1108 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1109 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs());
1112 * Use the default configuration for the IRQs 0-15. Unless
1113 * overridden by (MADT) interrupt source override entries.
1115 for (i = 0; i < nr_legacy_irqs(); i++) {
1117 unsigned int dstapic;
1121 /* Locate the gsi that irq i maps to. */
1122 if (acpi_isa_irq_to_gsi(i, &gsi))
1126 * Locate the IOAPIC that manages the ISA IRQ.
1128 ioapic = mp_find_ioapic(gsi);
1131 pin = mp_find_ioapic_pin(ioapic, gsi);
1132 dstapic = mpc_ioapic_id(ioapic);
1134 for (idx = 0; idx < mp_irq_entries; idx++) {
1135 struct mpc_intsrc *irq = mp_irqs + idx;
1137 /* Do we already have a mapping for this ISA IRQ? */
1138 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1141 /* Do we already have a mapping for this IOAPIC pin */
1142 if (irq->dstapic == dstapic && irq->dstirq == pin)
1146 if (idx != mp_irq_entries) {
1147 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1148 continue; /* IRQ already used */
1151 mp_irq.type = MP_INTSRC;
1152 mp_irq.irqflag = 0; /* Conforming */
1153 mp_irq.srcbus = MP_ISA_BUS;
1154 mp_irq.dstapic = dstapic;
1155 mp_irq.irqtype = mp_INT;
1156 mp_irq.srcbusirq = i; /* Identity mapped */
1157 mp_irq.dstirq = pin;
1159 mp_save_irq(&mp_irq);
1164 * Parse IOAPIC related entries in MADT
1165 * returns 0 on success, < 0 on error
1167 static int __init acpi_parse_madt_ioapic_entries(void)
1172 * ACPI interpreter is required to complete interrupt setup,
1173 * so if it is off, don't enumerate the io-apics with ACPI.
1174 * If MPS is present, it will handle them,
1175 * otherwise the system will stay in PIC mode
1177 if (acpi_disabled || acpi_noirq)
1180 if (!boot_cpu_has(X86_FEATURE_APIC))
1184 * if "noapic" boot option, don't look for IO-APICs
1186 if (skip_ioapic_setup) {
1187 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1188 "due to 'noapic' option.\n");
1192 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1195 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1197 } else if (count < 0) {
1198 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1202 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1203 acpi_parse_int_src_ovr, nr_irqs);
1205 printk(KERN_ERR PREFIX
1206 "Error parsing interrupt source overrides entry\n");
1207 /* TBD: Cleanup to allow fallback to MPS */
1212 * If BIOS did not supply an INT_SRC_OVR for the SCI
1213 * pretend we got one so we can set the SCI flags.
1215 if (!acpi_sci_override_gsi)
1216 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1217 acpi_gbl_FADT.sci_interrupt);
1219 /* Fill in identity legacy mappings where no override */
1220 mp_config_acpi_legacy_irqs();
1222 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1223 acpi_parse_nmi_src, nr_irqs);
1225 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1226 /* TBD: Cleanup to allow fallback to MPS */
1233 static inline int acpi_parse_madt_ioapic_entries(void)
1237 #endif /* !CONFIG_X86_IO_APIC */
1239 static void __init early_acpi_process_madt(void)
1241 #ifdef CONFIG_X86_LOCAL_APIC
1244 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1247 * Parse MADT LAPIC entries
1249 error = early_acpi_parse_madt_lapic_addr_ovr();
1252 smp_found_config = 1;
1254 if (error == -EINVAL) {
1256 * Dell Precision Workstation 410, 610 come here.
1258 printk(KERN_ERR PREFIX
1259 "Invalid BIOS MADT, disabling ACPI\n");
1266 static void __init acpi_process_madt(void)
1268 #ifdef CONFIG_X86_LOCAL_APIC
1271 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1274 * Parse MADT LAPIC entries
1276 error = acpi_parse_madt_lapic_entries();
1281 * Parse MADT IO-APIC entries
1283 mutex_lock(&acpi_ioapic_lock);
1284 error = acpi_parse_madt_ioapic_entries();
1285 mutex_unlock(&acpi_ioapic_lock);
1287 acpi_set_irq_model_ioapic();
1289 smp_found_config = 1;
1292 if (error == -EINVAL) {
1294 * Dell Precision Workstation 410, 610 come here.
1296 printk(KERN_ERR PREFIX
1297 "Invalid BIOS MADT, disabling ACPI\n");
1302 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1303 * In the event an MPS table was found, forget it.
1304 * Boot with "acpi=off" to use MPS on such a system.
1306 if (smp_found_config) {
1307 printk(KERN_WARNING PREFIX
1308 "No APIC-table, disabling MPS\n");
1309 smp_found_config = 0;
1314 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1315 * processors, where MPS only supports physical.
1317 if (acpi_lapic && acpi_ioapic)
1318 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1320 else if (acpi_lapic)
1321 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1322 "configuration information\n");
1327 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1330 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1337 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1340 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1347 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1350 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1354 "Warning: DMI blacklist says broken, but acpi forced\n");
1360 * Force ignoring BIOS IRQ0 override
1362 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1364 if (!acpi_skip_timer_override) {
1365 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1367 acpi_skip_timer_override = 1;
1373 * ACPI offers an alternative platform interface model that removes
1374 * ACPI hardware requirements for platforms that do not implement
1375 * the PC Architecture.
1377 * We initialize the Hardware-reduced ACPI model here:
1379 static void __init acpi_reduced_hw_init(void)
1381 if (acpi_gbl_reduced_hardware) {
1383 * Override x86_init functions and bypass legacy pic
1384 * in Hardware-reduced ACPI mode
1386 x86_init.timers.timer_init = x86_init_noop;
1387 x86_init.irqs.pre_vector_init = x86_init_noop;
1388 legacy_pic = &null_legacy_pic;
1393 * If your system is blacklisted here, but you find that acpi=force
1394 * works for you, please contact linux-acpi@vger.kernel.org
1396 static const struct dmi_system_id acpi_dmi_table[] __initconst = {
1398 * Boxes that need ACPI disabled
1401 .callback = dmi_disable_acpi,
1402 .ident = "IBM Thinkpad",
1404 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1405 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1410 * Boxes that need ACPI PCI IRQ routing disabled
1413 .callback = disable_acpi_irq,
1414 .ident = "ASUS A7V",
1416 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1417 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1418 /* newer BIOS, Revision 1011, does work */
1419 DMI_MATCH(DMI_BIOS_VERSION,
1420 "ASUS A7V ACPI BIOS Revision 1007"),
1425 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1426 * for LPC bridge, which is needed for the PCI
1427 * interrupt links to work. DSDT fix is in bug 5966.
1428 * 2645, 2646 model numbers are shared with 600/600E/600X
1430 .callback = disable_acpi_irq,
1431 .ident = "IBM Thinkpad 600 Series 2645",
1433 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1434 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1438 .callback = disable_acpi_irq,
1439 .ident = "IBM Thinkpad 600 Series 2646",
1441 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1442 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1446 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1449 .callback = disable_acpi_pci,
1450 .ident = "ASUS PR-DLS",
1452 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1453 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1454 DMI_MATCH(DMI_BIOS_VERSION,
1455 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1456 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1460 .callback = disable_acpi_pci,
1461 .ident = "Acer TravelMate 36x Laptop",
1463 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1464 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1470 /* second table for DMI checks that should run after early-quirks */
1471 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = {
1473 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1474 * which includes some code which overrides all temperature
1475 * trip points to 16C if the INTIN2 input of the I/O APIC
1476 * is enabled. This input is incorrectly designated the
1477 * ISA IRQ 0 via an interrupt source override even though
1478 * it is wired to the output of the master 8259A and INTIN0
1479 * is not connected at all. Force ignoring BIOS IRQ0
1480 * override in that cases.
1483 .callback = dmi_ignore_irq0_timer_override,
1484 .ident = "HP nx6115 laptop",
1486 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1487 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1491 .callback = dmi_ignore_irq0_timer_override,
1492 .ident = "HP NX6125 laptop",
1494 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1495 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1499 .callback = dmi_ignore_irq0_timer_override,
1500 .ident = "HP NX6325 laptop",
1502 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1503 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1507 .callback = dmi_ignore_irq0_timer_override,
1508 .ident = "HP 6715b laptop",
1510 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1511 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1515 .callback = dmi_ignore_irq0_timer_override,
1516 .ident = "FUJITSU SIEMENS",
1518 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1519 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1526 * acpi_boot_table_init() and acpi_boot_init()
1527 * called from setup_arch(), always.
1528 * 1. checksums all tables
1529 * 2. enumerates lapics
1530 * 3. enumerates io-apics
1532 * acpi_table_init() is separate to allow reading SRAT without
1533 * other side effects.
1535 * side effects of acpi_boot_init:
1536 * acpi_lapic = 1 if LAPIC found
1537 * acpi_ioapic = 1 if IOAPIC found
1538 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1539 * if acpi_blacklisted() acpi_disabled = 1;
1540 * acpi_irq_model=...
1544 void __init acpi_boot_table_init(void)
1546 dmi_check_system(acpi_dmi_table);
1549 * If acpi_disabled, bail out
1555 * Initialize the ACPI boot-time table parser.
1557 if (acpi_table_init()) {
1562 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1565 * blacklist may disable ACPI entirely
1567 if (acpi_blacklisted()) {
1569 printk(KERN_WARNING PREFIX "acpi=force override\n");
1571 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1578 int __init early_acpi_boot_init(void)
1581 * If acpi_disabled, bail out
1587 * Process the Multiple APIC Description Table (MADT), if present
1589 early_acpi_process_madt();
1592 * Hardware-reduced ACPI mode initialization:
1594 acpi_reduced_hw_init();
1599 int __init acpi_boot_init(void)
1601 /* those are executed after early-quirks are executed */
1602 dmi_check_system(acpi_dmi_table_late);
1605 * If acpi_disabled, bail out
1610 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1613 * set sci_int and PM timer address
1615 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1618 * Process the Multiple APIC Description Table (MADT), if present
1620 acpi_process_madt();
1622 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1623 if (IS_ENABLED(CONFIG_ACPI_BGRT))
1624 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
1627 x86_init.pci.init = pci_acpi_init;
1632 static int __init parse_acpi(char *arg)
1637 /* "acpi=off" disables both ACPI table parsing and interpreter */
1638 if (strcmp(arg, "off") == 0) {
1641 /* acpi=force to over-ride black-list */
1642 else if (strcmp(arg, "force") == 0) {
1646 /* acpi=strict disables out-of-spec workarounds */
1647 else if (strcmp(arg, "strict") == 0) {
1650 /* acpi=rsdt use RSDT instead of XSDT */
1651 else if (strcmp(arg, "rsdt") == 0) {
1652 acpi_gbl_do_not_use_xsdt = TRUE;
1654 /* "acpi=noirq" disables ACPI interrupt routing */
1655 else if (strcmp(arg, "noirq") == 0) {
1658 /* "acpi=copy_dsdt" copys DSDT */
1659 else if (strcmp(arg, "copy_dsdt") == 0) {
1660 acpi_gbl_copy_dsdt_locally = 1;
1662 /* "acpi=nocmcff" disables FF mode for corrected errors */
1663 else if (strcmp(arg, "nocmcff") == 0) {
1664 acpi_disable_cmcff = 1;
1666 /* Core will printk when we return error. */
1671 early_param("acpi", parse_acpi);
1673 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1674 static int __init parse_pci(char *arg)
1676 if (arg && strcmp(arg, "noacpi") == 0)
1680 early_param("pci", parse_pci);
1682 int __init acpi_mps_check(void)
1684 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1685 /* mptable code is not built-in*/
1686 if (acpi_disabled || acpi_noirq) {
1687 printk(KERN_WARNING "MPS support code is not built-in.\n"
1688 "Using acpi=off or acpi=noirq or pci=noacpi "
1689 "may have problem\n");
1696 #ifdef CONFIG_X86_IO_APIC
1697 static int __init parse_acpi_skip_timer_override(char *arg)
1699 acpi_skip_timer_override = 1;
1702 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1704 static int __init parse_acpi_use_timer_override(char *arg)
1706 acpi_use_timer_override = 1;
1709 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1710 #endif /* CONFIG_X86_IO_APIC */
1712 static int __init setup_acpi_sci(char *s)
1716 if (!strcmp(s, "edge"))
1717 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1718 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1719 else if (!strcmp(s, "level"))
1720 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1721 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1722 else if (!strcmp(s, "high"))
1723 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1724 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1725 else if (!strcmp(s, "low"))
1726 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1727 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1732 early_param("acpi_sci", setup_acpi_sci);
1734 int __acpi_acquire_global_lock(unsigned int *lock)
1736 unsigned int old, new, val;
1739 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1740 val = cmpxchg(lock, old, new);
1741 } while (unlikely (val != old));
1742 return (new < 3) ? -1 : 0;
1745 int __acpi_release_global_lock(unsigned int *lock)
1747 unsigned int old, new, val;
1751 val = cmpxchg(lock, old, new);
1752 } while (unlikely (val != old));
1756 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1758 e820__range_add(addr, size, E820_TYPE_ACPI);
1759 e820__update_table_print();