1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * boot.c - Architecture-Specific Low-Level ACPI Boot Support
9 #include <linux/init.h>
10 #include <linux/acpi.h>
11 #include <linux/acpi_pmtmr.h>
12 #include <linux/efi.h>
13 #include <linux/cpumask.h>
14 #include <linux/export.h>
15 #include <linux/dmi.h>
16 #include <linux/irq.h>
17 #include <linux/slab.h>
18 #include <linux/memblock.h>
19 #include <linux/ioport.h>
20 #include <linux/pci.h>
21 #include <linux/efi-bgrt.h>
22 #include <linux/serial_core.h>
24 #include <asm/e820/api.h>
25 #include <asm/irqdomain.h>
26 #include <asm/pci_x86.h>
27 #include <asm/pgtable.h>
28 #include <asm/io_apic.h>
31 #include <asm/mpspec.h>
33 #include <asm/i8259.h>
34 #include <asm/setup.h>
36 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
37 static int __initdata acpi_force = 0;
39 EXPORT_SYMBOL(acpi_disabled);
42 # include <asm/proto.h>
45 #define PREFIX "ACPI: "
47 int acpi_noirq; /* skip ACPI IRQ initialization */
48 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
49 EXPORT_SYMBOL(acpi_pci_disabled);
54 int acpi_disable_cmcff;
56 /* ACPI SCI override configuration */
57 u8 acpi_sci_flags __initdata;
58 u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ;
59 int acpi_skip_timer_override __initdata;
60 int acpi_use_timer_override __initdata;
61 int acpi_fix_pin2_polarity __initdata;
63 #ifdef CONFIG_X86_LOCAL_APIC
64 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
67 #ifdef CONFIG_X86_IO_APIC
69 * Locks related to IOAPIC hotplug
71 * ->device_hotplug_lock
74 * Interrupt mapping side:
79 static DEFINE_MUTEX(acpi_ioapic_lock);
82 /* --------------------------------------------------------------------------
83 Boot-time Configuration
84 -------------------------------------------------------------------------- */
87 * The default interrupt routing model is PIC (8259). This gets
88 * overridden if IOAPICs are enumerated (below).
90 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
94 * ISA irqs by default are the first 16 gsis but can be
95 * any gsi as specified by an interrupt source override.
97 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
98 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
102 * This is just a simple wrapper around early_memremap(),
103 * with sanity checks for phys == 0 and size == 0.
105 void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)
111 return early_memremap(phys, size);
114 void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
119 early_memunmap(map, size);
122 #ifdef CONFIG_X86_LOCAL_APIC
123 static int __init acpi_parse_madt(struct acpi_table_header *table)
125 struct acpi_table_madt *madt = NULL;
127 if (!boot_cpu_has(X86_FEATURE_APIC))
130 madt = (struct acpi_table_madt *)table;
132 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
137 acpi_lapic_addr = (u64) madt->address;
139 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
143 default_acpi_madt_oem_check(madt->header.oem_id,
144 madt->header.oem_table_id);
150 * acpi_register_lapic - register a local apic and generates a logic cpu number
151 * @id: local apic id to register
152 * @acpiid: ACPI id to register
153 * @enabled: this cpu is enabled or not
155 * Returns the logic cpu number which maps to the local apic
157 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
159 unsigned int ver = 0;
162 if (id >= MAX_LOCAL_APIC) {
163 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
172 if (boot_cpu_physical_apicid != -1U)
173 ver = boot_cpu_apic_version;
175 cpu = generic_processor_info(id, ver);
177 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
183 acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end)
185 struct acpi_madt_local_x2apic *processor = NULL;
186 #ifdef CONFIG_X86_X2APIC
191 processor = (struct acpi_madt_local_x2apic *)header;
193 if (BAD_MADT_ENTRY(processor, end))
196 acpi_table_print_madt_entry(&header->common);
198 #ifdef CONFIG_X86_X2APIC
199 apic_id = processor->local_apic_id;
200 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
202 /* Ignore invalid ID */
203 if (apic_id == 0xffffffff)
207 * We need to register disabled CPU as well to permit
208 * counting disabled CPUs. This allows us to size
209 * cpus_possible_map more accurately, to permit
210 * to not preallocating memory for all NR_CPUS
211 * when we use CPU hotplug.
213 if (!apic->apic_id_valid(apic_id)) {
215 pr_warn(PREFIX "x2apic entry ignored\n");
219 acpi_register_lapic(apic_id, processor->uid, enabled);
221 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
228 acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end)
230 struct acpi_madt_local_apic *processor = NULL;
232 processor = (struct acpi_madt_local_apic *)header;
234 if (BAD_MADT_ENTRY(processor, end))
237 acpi_table_print_madt_entry(&header->common);
239 /* Ignore invalid ID */
240 if (processor->id == 0xff)
244 * We need to register disabled CPU as well to permit
245 * counting disabled CPUs. This allows us to size
246 * cpus_possible_map more accurately, to permit
247 * to not preallocating memory for all NR_CPUS
248 * when we use CPU hotplug.
250 acpi_register_lapic(processor->id, /* APIC ID */
251 processor->processor_id, /* ACPI ID */
252 processor->lapic_flags & ACPI_MADT_ENABLED);
258 acpi_parse_sapic(union acpi_subtable_headers *header, const unsigned long end)
260 struct acpi_madt_local_sapic *processor = NULL;
262 processor = (struct acpi_madt_local_sapic *)header;
264 if (BAD_MADT_ENTRY(processor, end))
267 acpi_table_print_madt_entry(&header->common);
269 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
270 processor->processor_id, /* ACPI ID */
271 processor->lapic_flags & ACPI_MADT_ENABLED);
277 acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header,
278 const unsigned long end)
280 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
282 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
284 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
287 acpi_table_print_madt_entry(&header->common);
289 acpi_lapic_addr = lapic_addr_ovr->address;
295 acpi_parse_x2apic_nmi(union acpi_subtable_headers *header,
296 const unsigned long end)
298 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
300 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
302 if (BAD_MADT_ENTRY(x2apic_nmi, end))
305 acpi_table_print_madt_entry(&header->common);
307 if (x2apic_nmi->lint != 1)
308 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
314 acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end)
316 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
318 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
320 if (BAD_MADT_ENTRY(lapic_nmi, end))
323 acpi_table_print_madt_entry(&header->common);
325 if (lapic_nmi->lint != 1)
326 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
331 #endif /*CONFIG_X86_LOCAL_APIC */
333 #ifdef CONFIG_X86_IO_APIC
336 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
337 u8 trigger, u32 gsi);
339 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
343 * Check bus_irq boundary.
345 if (bus_irq >= NR_IRQS_LEGACY) {
346 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq);
351 * TBD: This check is for faulty timer entries, where the override
352 * erroneously sets the trigger to level, resulting in a HUGE
353 * increase of timer interrupts!
355 if ((bus_irq == 0) && (trigger == 3))
358 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0)
361 * Reset default identity mapping if gsi is also an legacy IRQ,
362 * otherwise there will be more than one entry with the same GSI
363 * and acpi_isa_irq_to_gsi() may give wrong result.
365 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
366 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ;
367 isa_irq_to_gsi[bus_irq] = gsi;
370 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
373 #ifdef CONFIG_X86_MPPARSE
374 struct mpc_intsrc mp_irq;
375 struct pci_dev *pdev;
376 unsigned char number;
383 if (!dev || !dev_is_pci(dev))
386 pdev = to_pci_dev(dev);
387 number = pdev->bus->number;
390 /* print the entry should happen on mptable identically */
391 mp_irq.type = MP_INTSRC;
392 mp_irq.irqtype = mp_INT;
393 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
394 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
395 mp_irq.srcbus = number;
396 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
397 ioapic = mp_find_ioapic(gsi);
398 mp_irq.dstapic = mpc_ioapic_id(ioapic);
399 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
401 mp_save_irq(&mp_irq);
406 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
409 struct mpc_intsrc mp_irq;
412 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */
413 ioapic = mp_find_ioapic(gsi);
415 pr_warn("Failed to find ioapic for gsi : %u\n", gsi);
419 pin = mp_find_ioapic_pin(ioapic, gsi);
421 mp_irq.type = MP_INTSRC;
422 mp_irq.irqtype = mp_INT;
423 mp_irq.irqflag = (trigger << 2) | polarity;
424 mp_irq.srcbus = MP_ISA_BUS;
425 mp_irq.srcbusirq = bus_irq;
426 mp_irq.dstapic = mpc_ioapic_id(ioapic);
429 mp_save_irq(&mp_irq);
435 acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end)
437 struct acpi_madt_io_apic *ioapic = NULL;
438 struct ioapic_domain_cfg cfg = {
439 .type = IOAPIC_DOMAIN_DYNAMIC,
440 .ops = &mp_ioapic_irqdomain_ops,
443 ioapic = (struct acpi_madt_io_apic *)header;
445 if (BAD_MADT_ENTRY(ioapic, end))
448 acpi_table_print_madt_entry(&header->common);
450 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
451 if (ioapic->global_irq_base < nr_legacy_irqs())
452 cfg.type = IOAPIC_DOMAIN_LEGACY;
454 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
461 * Parse Interrupt Source Override for the ACPI SCI
463 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
465 if (trigger == 0) /* compatible SCI trigger is level */
468 if (polarity == 0) /* compatible SCI polarity is low */
471 /* Command-line over-ride via acpi_sci= */
472 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
473 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
475 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
476 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
478 if (bus_irq < NR_IRQS_LEGACY)
479 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
481 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi);
483 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
486 * stash over-ride to indicate we've been here
487 * and for later update of acpi_gbl_FADT
489 acpi_sci_override_gsi = gsi;
494 acpi_parse_int_src_ovr(union acpi_subtable_headers * header,
495 const unsigned long end)
497 struct acpi_madt_interrupt_override *intsrc = NULL;
499 intsrc = (struct acpi_madt_interrupt_override *)header;
501 if (BAD_MADT_ENTRY(intsrc, end))
504 acpi_table_print_madt_entry(&header->common);
506 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
507 acpi_sci_ioapic_setup(intsrc->source_irq,
508 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
509 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
514 if (intsrc->source_irq == 0) {
515 if (acpi_skip_timer_override) {
516 printk(PREFIX "BIOS IRQ0 override ignored.\n");
520 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
521 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
522 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
523 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
527 mp_override_legacy_irq(intsrc->source_irq,
528 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
529 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
536 acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end)
538 struct acpi_madt_nmi_source *nmi_src = NULL;
540 nmi_src = (struct acpi_madt_nmi_source *)header;
542 if (BAD_MADT_ENTRY(nmi_src, end))
545 acpi_table_print_madt_entry(&header->common);
547 /* TBD: Support nimsrc entries? */
552 #endif /* CONFIG_X86_IO_APIC */
555 * acpi_pic_sci_set_trigger()
557 * use ELCR to set PIC-mode trigger type for SCI
559 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
560 * it may require Edge Trigger -- use "acpi_sci=edge"
562 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
563 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
564 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
565 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
568 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
570 unsigned int mask = 1 << irq;
571 unsigned int old, new;
573 /* Real old ELCR mask */
574 old = inb(0x4d0) | (inb(0x4d1) << 8);
577 * If we use ACPI to set PCI IRQs, then we should clear ELCR
578 * since we will set it correctly as we enable the PCI irq
581 new = acpi_noirq ? old : 0;
584 * Update SCI information in the ELCR, it isn't in the PCI
588 case 1: /* Edge - clear */
591 case 3: /* Level - set */
599 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
601 outb(new >> 8, 0x4d1);
604 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
606 int rc, irq, trigger, polarity;
608 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
613 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
617 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
618 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
619 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
626 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
628 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
630 if (isa_irq < nr_legacy_irqs() &&
631 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) {
632 *gsi = isa_irq_to_gsi[isa_irq];
639 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
640 int trigger, int polarity)
644 * Make sure all (legacy) PCI IRQs are set as level-triggered.
646 if (trigger == ACPI_LEVEL_SENSITIVE)
647 elcr_set_level_irq(gsi);
653 #ifdef CONFIG_X86_LOCAL_APIC
654 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
655 int trigger, int polarity)
658 #ifdef CONFIG_X86_IO_APIC
660 struct irq_alloc_info info;
662 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
663 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
664 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
665 ioapic_set_alloc_attr(&info, node, trigger, polarity);
667 mutex_lock(&acpi_ioapic_lock);
668 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
669 /* Don't set up the ACPI SCI because it's already set up */
670 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt)
671 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
672 mutex_unlock(&acpi_ioapic_lock);
678 static void acpi_unregister_gsi_ioapic(u32 gsi)
680 #ifdef CONFIG_X86_IO_APIC
683 mutex_lock(&acpi_ioapic_lock);
684 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
687 mutex_unlock(&acpi_ioapic_lock);
692 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
693 int trigger, int polarity) = acpi_register_gsi_pic;
694 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
696 #ifdef CONFIG_ACPI_SLEEP
697 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
699 int (*acpi_suspend_lowlevel)(void);
703 * success: return IRQ number (>=0)
704 * failure: return < 0
706 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
708 return __acpi_register_gsi(dev, gsi, trigger, polarity);
710 EXPORT_SYMBOL_GPL(acpi_register_gsi);
712 void acpi_unregister_gsi(u32 gsi)
714 if (__acpi_unregister_gsi)
715 __acpi_unregister_gsi(gsi);
717 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
719 #ifdef CONFIG_X86_LOCAL_APIC
720 static void __init acpi_set_irq_model_ioapic(void)
722 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
723 __acpi_register_gsi = acpi_register_gsi_ioapic;
724 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
730 * ACPI based hotplug support for CPU
732 #ifdef CONFIG_ACPI_HOTPLUG_CPU
733 #include <acpi/processor.h>
735 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
737 #ifdef CONFIG_ACPI_NUMA
740 nid = acpi_get_node(handle);
741 if (nid != NUMA_NO_NODE) {
742 set_apicid_to_node(physid, nid);
743 numa_set_node(cpu, nid);
749 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
754 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED);
756 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
760 acpi_processor_set_pdc(handle);
761 acpi_map_cpu2node(handle, cpu, physid);
766 EXPORT_SYMBOL(acpi_map_cpu);
768 int acpi_unmap_cpu(int cpu)
770 #ifdef CONFIG_ACPI_NUMA
771 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
774 per_cpu(x86_cpu_to_apicid, cpu) = -1;
775 set_cpu_present(cpu, false);
780 EXPORT_SYMBOL(acpi_unmap_cpu);
781 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
783 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
786 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
789 struct ioapic_domain_cfg cfg = {
790 .type = IOAPIC_DOMAIN_DYNAMIC,
791 .ops = &mp_ioapic_irqdomain_ops,
794 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
796 unsigned long long uid;
799 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
801 if (ACPI_FAILURE(status)) {
802 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
805 ioapic_id = (int)uid;
808 mutex_lock(&acpi_ioapic_lock);
809 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
810 mutex_unlock(&acpi_ioapic_lock);
815 EXPORT_SYMBOL(acpi_register_ioapic);
817 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
821 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
822 mutex_lock(&acpi_ioapic_lock);
823 ret = mp_unregister_ioapic(gsi_base);
824 mutex_unlock(&acpi_ioapic_lock);
829 EXPORT_SYMBOL(acpi_unregister_ioapic);
832 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
833 * has been registered
834 * @handle: ACPI handle of the IOAPIC device
835 * @gsi_base: GSI base associated with the IOAPIC
837 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
838 * with acpi_register_ioapic()/acpi_unregister_ioapic().
840 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
844 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
845 mutex_lock(&acpi_ioapic_lock);
846 ret = mp_ioapic_registered(gsi_base);
847 mutex_unlock(&acpi_ioapic_lock);
853 static int __init acpi_parse_sbf(struct acpi_table_header *table)
855 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
857 sbf_port = sb->cmos_index; /* Save CMOS port */
862 #ifdef CONFIG_HPET_TIMER
863 #include <asm/hpet.h>
865 static struct resource *hpet_res __initdata;
867 static int __init acpi_parse_hpet(struct acpi_table_header *table)
869 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
871 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
872 printk(KERN_WARNING PREFIX "HPET timers must be located in "
877 hpet_address = hpet_tbl->address.address;
878 hpet_blockid = hpet_tbl->sequence;
881 * Some broken BIOSes advertise HPET at 0x0. We really do not
882 * want to allocate a resource there.
885 printk(KERN_WARNING PREFIX
886 "HPET id: %#x base: %#lx is invalid\n",
887 hpet_tbl->id, hpet_address);
892 * Some even more broken BIOSes advertise HPET at
893 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
896 if (hpet_address == 0xfed0000000000000UL) {
897 if (!hpet_force_user) {
898 printk(KERN_WARNING PREFIX "HPET id: %#x "
899 "base: 0xfed0000000000000 is bogus\n "
900 "try hpet=force on the kernel command line to "
901 "fix it up to 0xfed00000.\n", hpet_tbl->id);
905 printk(KERN_WARNING PREFIX
906 "HPET id: %#x base: 0xfed0000000000000 fixed up "
907 "to 0xfed00000.\n", hpet_tbl->id);
911 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
912 hpet_tbl->id, hpet_address);
915 * Allocate and initialize the HPET firmware resource for adding into
916 * the resource tree during the lateinit timeframe.
918 #define HPET_RESOURCE_NAME_SIZE 9
919 hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE,
922 panic("%s: Failed to allocate %zu bytes\n", __func__,
923 sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
925 hpet_res->name = (void *)&hpet_res[1];
926 hpet_res->flags = IORESOURCE_MEM;
927 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
930 hpet_res->start = hpet_address;
931 hpet_res->end = hpet_address + (1 * 1024) - 1;
937 * hpet_insert_resource inserts the HPET resources used into the resource
940 static __init int hpet_insert_resource(void)
945 return insert_resource(&iomem_resource, hpet_res);
948 late_initcall(hpet_insert_resource);
951 #define acpi_parse_hpet NULL
954 static int __init acpi_parse_fadt(struct acpi_table_header *table)
956 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
957 pr_debug("ACPI: no legacy devices present\n");
958 x86_platform.legacy.devices.pnpbios = 0;
961 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
962 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
963 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
964 pr_debug("ACPI: i8042 controller is absent\n");
965 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
968 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
969 pr_debug("ACPI: not registering RTC platform device\n");
970 x86_platform.legacy.rtc = 0;
973 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) {
974 pr_debug("ACPI: probing for VGA not safe\n");
975 x86_platform.legacy.no_vga = 1;
978 #ifdef CONFIG_X86_PM_TIMER
979 /* detect the location of the ACPI PM Timer */
980 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
982 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
983 ACPI_ADR_SPACE_SYSTEM_IO)
986 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
988 * "X" fields are optional extensions to the original V1.0
989 * fields, so we must selectively expand V1.0 fields if the
990 * corresponding X field is zero.
993 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
996 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
999 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
1005 #ifdef CONFIG_X86_LOCAL_APIC
1007 * Parse LAPIC entries in MADT
1008 * returns 0 on success, < 0 on error
1011 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
1015 if (!boot_cpu_has(X86_FEATURE_APIC))
1019 * Note that the LAPIC address is obtained from the MADT (32-bit value)
1020 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
1023 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1024 acpi_parse_lapic_addr_ovr, 0);
1026 printk(KERN_ERR PREFIX
1027 "Error parsing LAPIC address override entry\n");
1031 register_lapic_address(acpi_lapic_addr);
1036 static int __init acpi_parse_madt_lapic_entries(void)
1041 struct acpi_subtable_proc madt_proc[2];
1043 if (!boot_cpu_has(X86_FEATURE_APIC))
1046 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1047 acpi_parse_sapic, MAX_LOCAL_APIC);
1050 memset(madt_proc, 0, sizeof(madt_proc));
1051 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1052 madt_proc[0].handler = acpi_parse_lapic;
1053 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1054 madt_proc[1].handler = acpi_parse_x2apic;
1055 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1056 sizeof(struct acpi_table_madt),
1057 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1059 printk(KERN_ERR PREFIX
1060 "Error parsing LAPIC/X2APIC entries\n");
1064 count = madt_proc[0].count;
1065 x2count = madt_proc[1].count;
1067 if (!count && !x2count) {
1068 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1069 /* TBD: Cleanup to allow fallback to MPS */
1071 } else if (count < 0 || x2count < 0) {
1072 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1073 /* TBD: Cleanup to allow fallback to MPS */
1077 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1078 acpi_parse_x2apic_nmi, 0);
1079 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1080 acpi_parse_lapic_nmi, 0);
1081 if (count < 0 || x2count < 0) {
1082 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1083 /* TBD: Cleanup to allow fallback to MPS */
1088 #endif /* CONFIG_X86_LOCAL_APIC */
1090 #ifdef CONFIG_X86_IO_APIC
1091 static void __init mp_config_acpi_legacy_irqs(void)
1094 struct mpc_intsrc mp_irq;
1098 * Fabricate the legacy ISA bus (bus #31).
1100 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1102 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1103 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs());
1106 * Use the default configuration for the IRQs 0-15. Unless
1107 * overridden by (MADT) interrupt source override entries.
1109 for (i = 0; i < nr_legacy_irqs(); i++) {
1111 unsigned int dstapic;
1115 /* Locate the gsi that irq i maps to. */
1116 if (acpi_isa_irq_to_gsi(i, &gsi))
1120 * Locate the IOAPIC that manages the ISA IRQ.
1122 ioapic = mp_find_ioapic(gsi);
1125 pin = mp_find_ioapic_pin(ioapic, gsi);
1126 dstapic = mpc_ioapic_id(ioapic);
1128 for (idx = 0; idx < mp_irq_entries; idx++) {
1129 struct mpc_intsrc *irq = mp_irqs + idx;
1131 /* Do we already have a mapping for this ISA IRQ? */
1132 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1135 /* Do we already have a mapping for this IOAPIC pin */
1136 if (irq->dstapic == dstapic && irq->dstirq == pin)
1140 if (idx != mp_irq_entries) {
1141 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1142 continue; /* IRQ already used */
1145 mp_irq.type = MP_INTSRC;
1146 mp_irq.irqflag = 0; /* Conforming */
1147 mp_irq.srcbus = MP_ISA_BUS;
1148 mp_irq.dstapic = dstapic;
1149 mp_irq.irqtype = mp_INT;
1150 mp_irq.srcbusirq = i; /* Identity mapped */
1151 mp_irq.dstirq = pin;
1153 mp_save_irq(&mp_irq);
1158 * Parse IOAPIC related entries in MADT
1159 * returns 0 on success, < 0 on error
1161 static int __init acpi_parse_madt_ioapic_entries(void)
1166 * ACPI interpreter is required to complete interrupt setup,
1167 * so if it is off, don't enumerate the io-apics with ACPI.
1168 * If MPS is present, it will handle them,
1169 * otherwise the system will stay in PIC mode
1171 if (acpi_disabled || acpi_noirq)
1174 if (!boot_cpu_has(X86_FEATURE_APIC))
1178 * if "noapic" boot option, don't look for IO-APICs
1180 if (skip_ioapic_setup) {
1181 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1182 "due to 'noapic' option.\n");
1186 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1189 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1191 } else if (count < 0) {
1192 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1196 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1197 acpi_parse_int_src_ovr, nr_irqs);
1199 printk(KERN_ERR PREFIX
1200 "Error parsing interrupt source overrides entry\n");
1201 /* TBD: Cleanup to allow fallback to MPS */
1206 * If BIOS did not supply an INT_SRC_OVR for the SCI
1207 * pretend we got one so we can set the SCI flags.
1208 * But ignore setting up SCI on hardware reduced platforms.
1210 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware)
1211 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1212 acpi_gbl_FADT.sci_interrupt);
1214 /* Fill in identity legacy mappings where no override */
1215 mp_config_acpi_legacy_irqs();
1217 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1218 acpi_parse_nmi_src, nr_irqs);
1220 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1221 /* TBD: Cleanup to allow fallback to MPS */
1228 static inline int acpi_parse_madt_ioapic_entries(void)
1232 #endif /* !CONFIG_X86_IO_APIC */
1234 static void __init early_acpi_process_madt(void)
1236 #ifdef CONFIG_X86_LOCAL_APIC
1239 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1242 * Parse MADT LAPIC entries
1244 error = early_acpi_parse_madt_lapic_addr_ovr();
1247 smp_found_config = 1;
1249 if (error == -EINVAL) {
1251 * Dell Precision Workstation 410, 610 come here.
1253 printk(KERN_ERR PREFIX
1254 "Invalid BIOS MADT, disabling ACPI\n");
1261 static void __init acpi_process_madt(void)
1263 #ifdef CONFIG_X86_LOCAL_APIC
1266 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1269 * Parse MADT LAPIC entries
1271 error = acpi_parse_madt_lapic_entries();
1276 * Parse MADT IO-APIC entries
1278 mutex_lock(&acpi_ioapic_lock);
1279 error = acpi_parse_madt_ioapic_entries();
1280 mutex_unlock(&acpi_ioapic_lock);
1282 acpi_set_irq_model_ioapic();
1284 smp_found_config = 1;
1287 if (error == -EINVAL) {
1289 * Dell Precision Workstation 410, 610 come here.
1291 printk(KERN_ERR PREFIX
1292 "Invalid BIOS MADT, disabling ACPI\n");
1297 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1298 * In the event an MPS table was found, forget it.
1299 * Boot with "acpi=off" to use MPS on such a system.
1301 if (smp_found_config) {
1302 printk(KERN_WARNING PREFIX
1303 "No APIC-table, disabling MPS\n");
1304 smp_found_config = 0;
1309 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1310 * processors, where MPS only supports physical.
1312 if (acpi_lapic && acpi_ioapic)
1313 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1315 else if (acpi_lapic)
1316 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1317 "configuration information\n");
1322 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1325 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1332 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1335 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1342 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1345 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1349 "Warning: DMI blacklist says broken, but acpi forced\n");
1355 * Force ignoring BIOS IRQ0 override
1357 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1359 if (!acpi_skip_timer_override) {
1360 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1362 acpi_skip_timer_override = 1;
1368 * ACPI offers an alternative platform interface model that removes
1369 * ACPI hardware requirements for platforms that do not implement
1370 * the PC Architecture.
1372 * We initialize the Hardware-reduced ACPI model here:
1374 void __init acpi_generic_reduced_hw_init(void)
1377 * Override x86_init functions and bypass legacy PIC in
1378 * hardware reduced ACPI mode.
1380 x86_init.timers.timer_init = x86_init_noop;
1381 x86_init.irqs.pre_vector_init = x86_init_noop;
1382 legacy_pic = &null_legacy_pic;
1385 static void __init acpi_reduced_hw_init(void)
1387 if (acpi_gbl_reduced_hardware)
1388 x86_init.acpi.reduced_hw_early_init();
1392 * If your system is blacklisted here, but you find that acpi=force
1395 static const struct dmi_system_id acpi_dmi_table[] __initconst = {
1397 * Boxes that need ACPI disabled
1400 .callback = dmi_disable_acpi,
1401 .ident = "IBM Thinkpad",
1403 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1404 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1409 * Boxes that need ACPI PCI IRQ routing disabled
1412 .callback = disable_acpi_irq,
1413 .ident = "ASUS A7V",
1415 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1416 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1417 /* newer BIOS, Revision 1011, does work */
1418 DMI_MATCH(DMI_BIOS_VERSION,
1419 "ASUS A7V ACPI BIOS Revision 1007"),
1424 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1425 * for LPC bridge, which is needed for the PCI
1426 * interrupt links to work. DSDT fix is in bug 5966.
1427 * 2645, 2646 model numbers are shared with 600/600E/600X
1429 .callback = disable_acpi_irq,
1430 .ident = "IBM Thinkpad 600 Series 2645",
1432 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1433 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1437 .callback = disable_acpi_irq,
1438 .ident = "IBM Thinkpad 600 Series 2646",
1440 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1441 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1445 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1448 .callback = disable_acpi_pci,
1449 .ident = "ASUS PR-DLS",
1451 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1452 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1453 DMI_MATCH(DMI_BIOS_VERSION,
1454 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1455 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1459 .callback = disable_acpi_pci,
1460 .ident = "Acer TravelMate 36x Laptop",
1462 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1463 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1469 /* second table for DMI checks that should run after early-quirks */
1470 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = {
1472 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1473 * which includes some code which overrides all temperature
1474 * trip points to 16C if the INTIN2 input of the I/O APIC
1475 * is enabled. This input is incorrectly designated the
1476 * ISA IRQ 0 via an interrupt source override even though
1477 * it is wired to the output of the master 8259A and INTIN0
1478 * is not connected at all. Force ignoring BIOS IRQ0
1479 * override in that cases.
1482 .callback = dmi_ignore_irq0_timer_override,
1483 .ident = "HP nx6115 laptop",
1485 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1486 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1490 .callback = dmi_ignore_irq0_timer_override,
1491 .ident = "HP NX6125 laptop",
1493 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1494 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1498 .callback = dmi_ignore_irq0_timer_override,
1499 .ident = "HP NX6325 laptop",
1501 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1502 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1506 .callback = dmi_ignore_irq0_timer_override,
1507 .ident = "HP 6715b laptop",
1509 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1510 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1514 .callback = dmi_ignore_irq0_timer_override,
1515 .ident = "FUJITSU SIEMENS",
1517 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1518 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1525 * acpi_boot_table_init() and acpi_boot_init()
1526 * called from setup_arch(), always.
1527 * 1. checksums all tables
1528 * 2. enumerates lapics
1529 * 3. enumerates io-apics
1531 * acpi_table_init() is separate to allow reading SRAT without
1532 * other side effects.
1534 * side effects of acpi_boot_init:
1535 * acpi_lapic = 1 if LAPIC found
1536 * acpi_ioapic = 1 if IOAPIC found
1537 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1538 * if acpi_blacklisted() acpi_disabled = 1;
1539 * acpi_irq_model=...
1543 void __init acpi_boot_table_init(void)
1545 dmi_check_system(acpi_dmi_table);
1548 * If acpi_disabled, bail out
1554 * Initialize the ACPI boot-time table parser.
1556 if (acpi_table_init()) {
1561 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1564 * blacklist may disable ACPI entirely
1566 if (acpi_blacklisted()) {
1568 printk(KERN_WARNING PREFIX "acpi=force override\n");
1570 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1577 int __init early_acpi_boot_init(void)
1580 * If acpi_disabled, bail out
1586 * Process the Multiple APIC Description Table (MADT), if present
1588 early_acpi_process_madt();
1591 * Hardware-reduced ACPI mode initialization:
1593 acpi_reduced_hw_init();
1598 int __init acpi_boot_init(void)
1600 /* those are executed after early-quirks are executed */
1601 dmi_check_system(acpi_dmi_table_late);
1604 * If acpi_disabled, bail out
1609 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1612 * set sci_int and PM timer address
1614 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1617 * Process the Multiple APIC Description Table (MADT), if present
1619 acpi_process_madt();
1621 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1622 if (IS_ENABLED(CONFIG_ACPI_BGRT))
1623 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
1626 x86_init.pci.init = pci_acpi_init;
1628 /* Do not enable ACPI SPCR console by default */
1629 acpi_parse_spcr(earlycon_acpi_spcr_enable, false);
1633 static int __init parse_acpi(char *arg)
1638 /* "acpi=off" disables both ACPI table parsing and interpreter */
1639 if (strcmp(arg, "off") == 0) {
1642 /* acpi=force to over-ride black-list */
1643 else if (strcmp(arg, "force") == 0) {
1647 /* acpi=strict disables out-of-spec workarounds */
1648 else if (strcmp(arg, "strict") == 0) {
1651 /* acpi=rsdt use RSDT instead of XSDT */
1652 else if (strcmp(arg, "rsdt") == 0) {
1653 acpi_gbl_do_not_use_xsdt = TRUE;
1655 /* "acpi=noirq" disables ACPI interrupt routing */
1656 else if (strcmp(arg, "noirq") == 0) {
1659 /* "acpi=copy_dsdt" copys DSDT */
1660 else if (strcmp(arg, "copy_dsdt") == 0) {
1661 acpi_gbl_copy_dsdt_locally = 1;
1663 /* "acpi=nocmcff" disables FF mode for corrected errors */
1664 else if (strcmp(arg, "nocmcff") == 0) {
1665 acpi_disable_cmcff = 1;
1667 /* Core will printk when we return error. */
1672 early_param("acpi", parse_acpi);
1674 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1675 static int __init parse_pci(char *arg)
1677 if (arg && strcmp(arg, "noacpi") == 0)
1681 early_param("pci", parse_pci);
1683 int __init acpi_mps_check(void)
1685 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1686 /* mptable code is not built-in*/
1687 if (acpi_disabled || acpi_noirq) {
1688 printk(KERN_WARNING "MPS support code is not built-in.\n"
1689 "Using acpi=off or acpi=noirq or pci=noacpi "
1690 "may have problem\n");
1697 #ifdef CONFIG_X86_IO_APIC
1698 static int __init parse_acpi_skip_timer_override(char *arg)
1700 acpi_skip_timer_override = 1;
1703 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1705 static int __init parse_acpi_use_timer_override(char *arg)
1707 acpi_use_timer_override = 1;
1710 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1711 #endif /* CONFIG_X86_IO_APIC */
1713 static int __init setup_acpi_sci(char *s)
1717 if (!strcmp(s, "edge"))
1718 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1719 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1720 else if (!strcmp(s, "level"))
1721 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1722 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1723 else if (!strcmp(s, "high"))
1724 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1725 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1726 else if (!strcmp(s, "low"))
1727 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1728 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1733 early_param("acpi_sci", setup_acpi_sci);
1735 int __acpi_acquire_global_lock(unsigned int *lock)
1737 unsigned int old, new, val;
1740 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1741 val = cmpxchg(lock, old, new);
1742 } while (unlikely (val != old));
1743 return (new < 3) ? -1 : 0;
1746 int __acpi_release_global_lock(unsigned int *lock)
1748 unsigned int old, new, val;
1752 val = cmpxchg(lock, old, new);
1753 } while (unlikely (val != old));
1757 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1759 e820__range_add(addr, size, E820_TYPE_ACPI);
1760 e820__update_table_print();
1763 void x86_default_set_root_pointer(u64 addr)
1765 boot_params.acpi_rsdp_addr = addr;
1768 u64 x86_default_get_root_pointer(void)
1770 return boot_params.acpi_rsdp_addr;