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/module.h>
32 #include <linux/dmi.h>
33 #include <linux/irq.h>
34 #include <linux/irqdomain.h>
35 #include <linux/slab.h>
36 #include <linux/bootmem.h>
37 #include <linux/ioport.h>
38 #include <linux/pci.h>
40 #include <asm/pci_x86.h>
41 #include <asm/pgtable.h>
42 #include <asm/io_apic.h>
45 #include <asm/mpspec.h>
47 #include <asm/i8259.h>
49 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
50 static int __initdata acpi_force = 0;
52 EXPORT_SYMBOL(acpi_disabled);
55 # include <asm/proto.h>
58 #define PREFIX "ACPI: "
60 int acpi_noirq; /* skip ACPI IRQ initialization */
61 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
62 EXPORT_SYMBOL(acpi_pci_disabled);
67 int acpi_disable_cmcff;
69 u8 acpi_sci_flags __initdata;
70 int acpi_sci_override_gsi __initdata;
71 int acpi_skip_timer_override __initdata;
72 int acpi_use_timer_override __initdata;
73 int acpi_fix_pin2_polarity __initdata;
75 #ifdef CONFIG_X86_LOCAL_APIC
76 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
79 #ifndef __HAVE_ARCH_CMPXCHG
80 #warning ACPI uses CMPXCHG, i486 and later hardware
83 /* --------------------------------------------------------------------------
84 Boot-time Configuration
85 -------------------------------------------------------------------------- */
88 * The default interrupt routing model is PIC (8259). This gets
89 * overridden if IOAPICs are enumerated (below).
91 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
95 * ISA irqs by default are the first 16 gsis but can be
96 * any gsi as specified by an interrupt source override.
98 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
99 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
102 #define ACPI_INVALID_GSI INT_MIN
105 * This is just a simple wrapper around early_ioremap(),
106 * with sanity checks for phys == 0 and size == 0.
108 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
114 return early_ioremap(phys, size);
117 void __init __acpi_unmap_table(char *map, unsigned long size)
122 early_iounmap(map, size);
125 #ifdef CONFIG_X86_LOCAL_APIC
126 static int __init acpi_parse_madt(struct acpi_table_header *table)
128 struct acpi_table_madt *madt = NULL;
133 madt = (struct acpi_table_madt *)table;
135 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
140 acpi_lapic_addr = (u64) madt->address;
142 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
146 default_acpi_madt_oem_check(madt->header.oem_id,
147 madt->header.oem_table_id);
153 * acpi_register_lapic - register a local apic and generates a logic cpu number
154 * @id: local apic id to register
155 * @enabled: this cpu is enabled or not
157 * Returns the logic cpu number which maps to the local apic
159 static int acpi_register_lapic(int id, u8 enabled)
161 unsigned int ver = 0;
163 if (id >= MAX_LOCAL_APIC) {
164 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
173 if (boot_cpu_physical_apicid != -1U)
174 ver = apic_version[boot_cpu_physical_apicid];
176 return generic_processor_info(id, ver);
180 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
182 struct acpi_madt_local_x2apic *processor = NULL;
186 processor = (struct acpi_madt_local_x2apic *)header;
188 if (BAD_MADT_ENTRY(processor, end))
191 acpi_table_print_madt_entry(header);
193 apic_id = processor->local_apic_id;
194 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
195 #ifdef CONFIG_X86_X2APIC
197 * We need to register disabled CPU as well to permit
198 * counting disabled CPUs. This allows us to size
199 * cpus_possible_map more accurately, to permit
200 * to not preallocating memory for all NR_CPUS
201 * when we use CPU hotplug.
203 if (!apic->apic_id_valid(apic_id) && enabled)
204 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
206 acpi_register_lapic(apic_id, enabled);
208 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
215 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
217 struct acpi_madt_local_apic *processor = NULL;
219 processor = (struct acpi_madt_local_apic *)header;
221 if (BAD_MADT_ENTRY(processor, end))
224 acpi_table_print_madt_entry(header);
227 * We need to register disabled CPU as well to permit
228 * counting disabled CPUs. This allows us to size
229 * cpus_possible_map more accurately, to permit
230 * to not preallocating memory for all NR_CPUS
231 * when we use CPU hotplug.
233 acpi_register_lapic(processor->id, /* APIC ID */
234 processor->lapic_flags & ACPI_MADT_ENABLED);
240 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
242 struct acpi_madt_local_sapic *processor = NULL;
244 processor = (struct acpi_madt_local_sapic *)header;
246 if (BAD_MADT_ENTRY(processor, end))
249 acpi_table_print_madt_entry(header);
251 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
252 processor->lapic_flags & ACPI_MADT_ENABLED);
258 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
259 const unsigned long end)
261 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
263 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
265 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
268 acpi_lapic_addr = lapic_addr_ovr->address;
274 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
275 const unsigned long end)
277 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
279 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
281 if (BAD_MADT_ENTRY(x2apic_nmi, end))
284 acpi_table_print_madt_entry(header);
286 if (x2apic_nmi->lint != 1)
287 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
293 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
295 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
297 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
299 if (BAD_MADT_ENTRY(lapic_nmi, end))
302 acpi_table_print_madt_entry(header);
304 if (lapic_nmi->lint != 1)
305 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
310 #endif /*CONFIG_X86_LOCAL_APIC */
312 #ifdef CONFIG_X86_IO_APIC
315 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
320 struct mpc_intsrc mp_irq;
323 * Convert 'gsi' to 'ioapic.pin'.
325 ioapic = mp_find_ioapic(gsi);
328 pin = mp_find_ioapic_pin(ioapic, gsi);
331 * TBD: This check is for faulty timer entries, where the override
332 * erroneously sets the trigger to level, resulting in a HUGE
333 * increase of timer interrupts!
335 if ((bus_irq == 0) && (trigger == 3))
338 mp_irq.type = MP_INTSRC;
339 mp_irq.irqtype = mp_INT;
340 mp_irq.irqflag = (trigger << 2) | polarity;
341 mp_irq.srcbus = MP_ISA_BUS;
342 mp_irq.srcbusirq = bus_irq; /* IRQ */
343 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
344 mp_irq.dstirq = pin; /* INTIN# */
346 mp_save_irq(&mp_irq);
349 * Reset default identity mapping if gsi is also an legacy IRQ,
350 * otherwise there will be more than one entry with the same GSI
351 * and acpi_isa_irq_to_gsi() may give wrong result.
353 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
354 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
355 isa_irq_to_gsi[bus_irq] = gsi;
358 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
361 #ifdef CONFIG_X86_MPPARSE
362 struct mpc_intsrc mp_irq;
363 struct pci_dev *pdev;
364 unsigned char number;
371 if (!dev || !dev_is_pci(dev))
374 pdev = to_pci_dev(dev);
375 number = pdev->bus->number;
378 /* print the entry should happen on mptable identically */
379 mp_irq.type = MP_INTSRC;
380 mp_irq.irqtype = mp_INT;
381 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
382 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
383 mp_irq.srcbus = number;
384 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
385 ioapic = mp_find_ioapic(gsi);
386 mp_irq.dstapic = mpc_ioapic_id(ioapic);
387 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
389 mp_save_irq(&mp_irq);
394 static int mp_register_gsi(struct device *dev, u32 gsi, int trigger,
399 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
402 /* Don't set up the ACPI SCI because it's already set up */
403 if (acpi_gbl_FADT.sci_interrupt == gsi)
406 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
407 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
408 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
409 if (mp_set_gsi_attr(gsi, trigger, polarity, node)) {
410 pr_warn("Failed to set pin attr for GSI%d\n", gsi);
414 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC);
418 if (enable_update_mptable)
419 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
424 static struct irq_domain_ops acpi_irqdomain_ops = {
425 .map = mp_irqdomain_map,
429 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
431 struct acpi_madt_io_apic *ioapic = NULL;
432 struct ioapic_domain_cfg cfg = {
433 .type = IOAPIC_DOMAIN_DYNAMIC,
434 .ops = &acpi_irqdomain_ops,
437 ioapic = (struct acpi_madt_io_apic *)header;
439 if (BAD_MADT_ENTRY(ioapic, end))
442 acpi_table_print_madt_entry(header);
444 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
445 if (ioapic->global_irq_base < nr_legacy_irqs())
446 cfg.type = IOAPIC_DOMAIN_LEGACY;
448 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
455 * Parse Interrupt Source Override for the ACPI SCI
457 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
459 if (trigger == 0) /* compatible SCI trigger is level */
462 if (polarity == 0) /* compatible SCI polarity is low */
465 /* Command-line over-ride via acpi_sci= */
466 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
467 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
469 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
470 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
472 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
475 * stash over-ride to indicate we've been here
476 * and for later update of acpi_gbl_FADT
478 acpi_sci_override_gsi = gsi;
483 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
484 const unsigned long end)
486 struct acpi_madt_interrupt_override *intsrc = NULL;
488 intsrc = (struct acpi_madt_interrupt_override *)header;
490 if (BAD_MADT_ENTRY(intsrc, end))
493 acpi_table_print_madt_entry(header);
495 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
496 acpi_sci_ioapic_setup(intsrc->source_irq,
497 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
498 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
503 if (intsrc->source_irq == 0) {
504 if (acpi_skip_timer_override) {
505 printk(PREFIX "BIOS IRQ0 override ignored.\n");
509 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
510 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
511 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
512 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
516 mp_override_legacy_irq(intsrc->source_irq,
517 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
518 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
525 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
527 struct acpi_madt_nmi_source *nmi_src = NULL;
529 nmi_src = (struct acpi_madt_nmi_source *)header;
531 if (BAD_MADT_ENTRY(nmi_src, end))
534 acpi_table_print_madt_entry(header);
536 /* TBD: Support nimsrc entries? */
541 #endif /* CONFIG_X86_IO_APIC */
544 * acpi_pic_sci_set_trigger()
546 * use ELCR to set PIC-mode trigger type for SCI
548 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
549 * it may require Edge Trigger -- use "acpi_sci=edge"
551 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
552 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
553 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
554 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
557 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
559 unsigned int mask = 1 << irq;
560 unsigned int old, new;
562 /* Real old ELCR mask */
563 old = inb(0x4d0) | (inb(0x4d1) << 8);
566 * If we use ACPI to set PCI IRQs, then we should clear ELCR
567 * since we will set it correctly as we enable the PCI irq
570 new = acpi_noirq ? old : 0;
573 * Update SCI information in the ELCR, it isn't in the PCI
577 case 1: /* Edge - clear */
580 case 3: /* Level - set */
588 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
590 outb(new >> 8, 0x4d1);
593 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
595 int irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC | IOAPIC_MAP_CHECK);
604 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
606 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
608 if (isa_irq < nr_legacy_irqs() &&
609 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
610 *gsi = isa_irq_to_gsi[isa_irq];
617 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
618 int trigger, int polarity)
622 * Make sure all (legacy) PCI IRQs are set as level-triggered.
624 if (trigger == ACPI_LEVEL_SENSITIVE)
625 eisa_set_level_irq(gsi);
631 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
632 int trigger, int polarity)
636 #ifdef CONFIG_X86_IO_APIC
637 irq = mp_register_gsi(dev, gsi, trigger, polarity);
643 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
644 int trigger, int polarity) = acpi_register_gsi_pic;
646 #ifdef CONFIG_ACPI_SLEEP
647 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
649 int (*acpi_suspend_lowlevel)(void);
653 * success: return IRQ number (>=0)
654 * failure: return < 0
656 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
658 return __acpi_register_gsi(dev, gsi, trigger, polarity);
660 EXPORT_SYMBOL_GPL(acpi_register_gsi);
662 void acpi_unregister_gsi(u32 gsi)
665 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
667 static void __init acpi_set_irq_model_ioapic(void)
669 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
670 __acpi_register_gsi = acpi_register_gsi_ioapic;
675 * ACPI based hotplug support for CPU
677 #ifdef CONFIG_ACPI_HOTPLUG_CPU
678 #include <acpi/processor.h>
680 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
682 #ifdef CONFIG_ACPI_NUMA
685 nid = acpi_get_node(handle);
687 set_apicid_to_node(physid, nid);
688 numa_set_node(cpu, nid);
693 static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
697 cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED);
699 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
703 acpi_processor_set_pdc(handle);
704 acpi_map_cpu2node(handle, cpu, physid);
710 /* wrapper to silence section mismatch warning */
711 int __ref acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
713 return _acpi_map_lsapic(handle, physid, pcpu);
715 EXPORT_SYMBOL(acpi_map_lsapic);
717 int acpi_unmap_lsapic(int cpu)
719 #ifdef CONFIG_ACPI_NUMA
720 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
723 per_cpu(x86_cpu_to_apicid, cpu) = -1;
724 set_cpu_present(cpu, false);
730 EXPORT_SYMBOL(acpi_unmap_lsapic);
731 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
733 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
739 EXPORT_SYMBOL(acpi_register_ioapic);
741 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
747 EXPORT_SYMBOL(acpi_unregister_ioapic);
749 static int __init acpi_parse_sbf(struct acpi_table_header *table)
751 struct acpi_table_boot *sb;
753 sb = (struct acpi_table_boot *)table;
755 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
759 sbf_port = sb->cmos_index; /* Save CMOS port */
764 #ifdef CONFIG_HPET_TIMER
765 #include <asm/hpet.h>
767 static struct resource *hpet_res __initdata;
769 static int __init acpi_parse_hpet(struct acpi_table_header *table)
771 struct acpi_table_hpet *hpet_tbl;
773 hpet_tbl = (struct acpi_table_hpet *)table;
775 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
779 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
780 printk(KERN_WARNING PREFIX "HPET timers must be located in "
785 hpet_address = hpet_tbl->address.address;
786 hpet_blockid = hpet_tbl->sequence;
789 * Some broken BIOSes advertise HPET at 0x0. We really do not
790 * want to allocate a resource there.
793 printk(KERN_WARNING PREFIX
794 "HPET id: %#x base: %#lx is invalid\n",
795 hpet_tbl->id, hpet_address);
800 * Some even more broken BIOSes advertise HPET at
801 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
804 if (hpet_address == 0xfed0000000000000UL) {
805 if (!hpet_force_user) {
806 printk(KERN_WARNING PREFIX "HPET id: %#x "
807 "base: 0xfed0000000000000 is bogus\n "
808 "try hpet=force on the kernel command line to "
809 "fix it up to 0xfed00000.\n", hpet_tbl->id);
813 printk(KERN_WARNING PREFIX
814 "HPET id: %#x base: 0xfed0000000000000 fixed up "
815 "to 0xfed00000.\n", hpet_tbl->id);
819 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
820 hpet_tbl->id, hpet_address);
823 * Allocate and initialize the HPET firmware resource for adding into
824 * the resource tree during the lateinit timeframe.
826 #define HPET_RESOURCE_NAME_SIZE 9
827 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
829 hpet_res->name = (void *)&hpet_res[1];
830 hpet_res->flags = IORESOURCE_MEM;
831 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
834 hpet_res->start = hpet_address;
835 hpet_res->end = hpet_address + (1 * 1024) - 1;
841 * hpet_insert_resource inserts the HPET resources used into the resource
844 static __init int hpet_insert_resource(void)
849 return insert_resource(&iomem_resource, hpet_res);
852 late_initcall(hpet_insert_resource);
855 #define acpi_parse_hpet NULL
858 static int __init acpi_parse_fadt(struct acpi_table_header *table)
861 #ifdef CONFIG_X86_PM_TIMER
862 /* detect the location of the ACPI PM Timer */
863 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
865 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
866 ACPI_ADR_SPACE_SYSTEM_IO)
869 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
871 * "X" fields are optional extensions to the original V1.0
872 * fields, so we must selectively expand V1.0 fields if the
873 * corresponding X field is zero.
876 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
879 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
882 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
888 #ifdef CONFIG_X86_LOCAL_APIC
890 * Parse LAPIC entries in MADT
891 * returns 0 on success, < 0 on error
894 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
902 * Note that the LAPIC address is obtained from the MADT (32-bit value)
903 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
906 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
907 acpi_parse_lapic_addr_ovr, 0);
909 printk(KERN_ERR PREFIX
910 "Error parsing LAPIC address override entry\n");
914 register_lapic_address(acpi_lapic_addr);
919 static int __init acpi_parse_madt_lapic_entries(void)
928 * Note that the LAPIC address is obtained from the MADT (32-bit value)
929 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
932 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
933 acpi_parse_lapic_addr_ovr, 0);
935 printk(KERN_ERR PREFIX
936 "Error parsing LAPIC address override entry\n");
940 register_lapic_address(acpi_lapic_addr);
942 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
943 acpi_parse_sapic, MAX_LOCAL_APIC);
946 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
947 acpi_parse_x2apic, MAX_LOCAL_APIC);
948 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
949 acpi_parse_lapic, MAX_LOCAL_APIC);
951 if (!count && !x2count) {
952 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
953 /* TBD: Cleanup to allow fallback to MPS */
955 } else if (count < 0 || x2count < 0) {
956 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
957 /* TBD: Cleanup to allow fallback to MPS */
961 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
962 acpi_parse_x2apic_nmi, 0);
963 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
964 acpi_parse_lapic_nmi, 0);
965 if (count < 0 || x2count < 0) {
966 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
967 /* TBD: Cleanup to allow fallback to MPS */
972 #endif /* CONFIG_X86_LOCAL_APIC */
974 #ifdef CONFIG_X86_IO_APIC
975 static void __init mp_config_acpi_legacy_irqs(void)
978 struct mpc_intsrc mp_irq;
982 * Fabricate the legacy ISA bus (bus #31).
984 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
986 set_bit(MP_ISA_BUS, mp_bus_not_pci);
987 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
990 * Use the default configuration for the IRQs 0-15. Unless
991 * overridden by (MADT) interrupt source override entries.
993 for (i = 0; i < nr_legacy_irqs(); i++) {
995 unsigned int dstapic;
999 /* Locate the gsi that irq i maps to. */
1000 if (acpi_isa_irq_to_gsi(i, &gsi))
1004 * Locate the IOAPIC that manages the ISA IRQ.
1006 ioapic = mp_find_ioapic(gsi);
1009 pin = mp_find_ioapic_pin(ioapic, gsi);
1010 dstapic = mpc_ioapic_id(ioapic);
1012 for (idx = 0; idx < mp_irq_entries; idx++) {
1013 struct mpc_intsrc *irq = mp_irqs + idx;
1015 /* Do we already have a mapping for this ISA IRQ? */
1016 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1019 /* Do we already have a mapping for this IOAPIC pin */
1020 if (irq->dstapic == dstapic && irq->dstirq == pin)
1024 if (idx != mp_irq_entries) {
1025 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1026 continue; /* IRQ already used */
1029 mp_irq.type = MP_INTSRC;
1030 mp_irq.irqflag = 0; /* Conforming */
1031 mp_irq.srcbus = MP_ISA_BUS;
1032 mp_irq.dstapic = dstapic;
1033 mp_irq.irqtype = mp_INT;
1034 mp_irq.srcbusirq = i; /* Identity mapped */
1035 mp_irq.dstirq = pin;
1037 mp_save_irq(&mp_irq);
1042 * Parse IOAPIC related entries in MADT
1043 * returns 0 on success, < 0 on error
1045 static int __init acpi_parse_madt_ioapic_entries(void)
1050 * ACPI interpreter is required to complete interrupt setup,
1051 * so if it is off, don't enumerate the io-apics with ACPI.
1052 * If MPS is present, it will handle them,
1053 * otherwise the system will stay in PIC mode
1055 if (acpi_disabled || acpi_noirq)
1062 * if "noapic" boot option, don't look for IO-APICs
1064 if (skip_ioapic_setup) {
1065 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1066 "due to 'noapic' option.\n");
1070 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1073 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1075 } else if (count < 0) {
1076 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1080 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1081 acpi_parse_int_src_ovr, nr_irqs);
1083 printk(KERN_ERR PREFIX
1084 "Error parsing interrupt source overrides entry\n");
1085 /* TBD: Cleanup to allow fallback to MPS */
1090 * If BIOS did not supply an INT_SRC_OVR for the SCI
1091 * pretend we got one so we can set the SCI flags.
1093 if (!acpi_sci_override_gsi)
1094 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1095 acpi_gbl_FADT.sci_interrupt);
1097 /* Fill in identity legacy mappings where no override */
1098 mp_config_acpi_legacy_irqs();
1100 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1101 acpi_parse_nmi_src, nr_irqs);
1103 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1104 /* TBD: Cleanup to allow fallback to MPS */
1111 static inline int acpi_parse_madt_ioapic_entries(void)
1115 #endif /* !CONFIG_X86_IO_APIC */
1117 static void __init early_acpi_process_madt(void)
1119 #ifdef CONFIG_X86_LOCAL_APIC
1122 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1125 * Parse MADT LAPIC entries
1127 error = early_acpi_parse_madt_lapic_addr_ovr();
1130 smp_found_config = 1;
1132 if (error == -EINVAL) {
1134 * Dell Precision Workstation 410, 610 come here.
1136 printk(KERN_ERR PREFIX
1137 "Invalid BIOS MADT, disabling ACPI\n");
1144 static void __init acpi_process_madt(void)
1146 #ifdef CONFIG_X86_LOCAL_APIC
1149 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1152 * Parse MADT LAPIC entries
1154 error = acpi_parse_madt_lapic_entries();
1159 * Parse MADT IO-APIC entries
1161 error = acpi_parse_madt_ioapic_entries();
1163 acpi_set_irq_model_ioapic();
1165 smp_found_config = 1;
1168 if (error == -EINVAL) {
1170 * Dell Precision Workstation 410, 610 come here.
1172 printk(KERN_ERR PREFIX
1173 "Invalid BIOS MADT, disabling ACPI\n");
1178 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1179 * In the event an MPS table was found, forget it.
1180 * Boot with "acpi=off" to use MPS on such a system.
1182 if (smp_found_config) {
1183 printk(KERN_WARNING PREFIX
1184 "No APIC-table, disabling MPS\n");
1185 smp_found_config = 0;
1190 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1191 * processors, where MPS only supports physical.
1193 if (acpi_lapic && acpi_ioapic)
1194 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1196 else if (acpi_lapic)
1197 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1198 "configuration information\n");
1203 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1206 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1213 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1216 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1223 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1226 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1230 "Warning: DMI blacklist says broken, but acpi forced\n");
1236 * Force ignoring BIOS IRQ0 override
1238 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1240 if (!acpi_skip_timer_override) {
1241 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1243 acpi_skip_timer_override = 1;
1249 * If your system is blacklisted here, but you find that acpi=force
1250 * works for you, please contact linux-acpi@vger.kernel.org
1252 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1254 * Boxes that need ACPI disabled
1257 .callback = dmi_disable_acpi,
1258 .ident = "IBM Thinkpad",
1260 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1261 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1266 * Boxes that need ACPI PCI IRQ routing disabled
1269 .callback = disable_acpi_irq,
1270 .ident = "ASUS A7V",
1272 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1273 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1274 /* newer BIOS, Revision 1011, does work */
1275 DMI_MATCH(DMI_BIOS_VERSION,
1276 "ASUS A7V ACPI BIOS Revision 1007"),
1281 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1282 * for LPC bridge, which is needed for the PCI
1283 * interrupt links to work. DSDT fix is in bug 5966.
1284 * 2645, 2646 model numbers are shared with 600/600E/600X
1286 .callback = disable_acpi_irq,
1287 .ident = "IBM Thinkpad 600 Series 2645",
1289 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1290 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1294 .callback = disable_acpi_irq,
1295 .ident = "IBM Thinkpad 600 Series 2646",
1297 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1298 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1302 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1305 .callback = disable_acpi_pci,
1306 .ident = "ASUS PR-DLS",
1308 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1309 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1310 DMI_MATCH(DMI_BIOS_VERSION,
1311 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1312 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1316 .callback = disable_acpi_pci,
1317 .ident = "Acer TravelMate 36x Laptop",
1319 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1320 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1326 /* second table for DMI checks that should run after early-quirks */
1327 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1329 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1330 * which includes some code which overrides all temperature
1331 * trip points to 16C if the INTIN2 input of the I/O APIC
1332 * is enabled. This input is incorrectly designated the
1333 * ISA IRQ 0 via an interrupt source override even though
1334 * it is wired to the output of the master 8259A and INTIN0
1335 * is not connected at all. Force ignoring BIOS IRQ0
1336 * override in that cases.
1339 .callback = dmi_ignore_irq0_timer_override,
1340 .ident = "HP nx6115 laptop",
1342 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1343 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1347 .callback = dmi_ignore_irq0_timer_override,
1348 .ident = "HP NX6125 laptop",
1350 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1351 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1355 .callback = dmi_ignore_irq0_timer_override,
1356 .ident = "HP NX6325 laptop",
1358 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1359 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1363 .callback = dmi_ignore_irq0_timer_override,
1364 .ident = "HP 6715b laptop",
1366 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1367 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1371 .callback = dmi_ignore_irq0_timer_override,
1372 .ident = "FUJITSU SIEMENS",
1374 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1375 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1382 * acpi_boot_table_init() and acpi_boot_init()
1383 * called from setup_arch(), always.
1384 * 1. checksums all tables
1385 * 2. enumerates lapics
1386 * 3. enumerates io-apics
1388 * acpi_table_init() is separate to allow reading SRAT without
1389 * other side effects.
1391 * side effects of acpi_boot_init:
1392 * acpi_lapic = 1 if LAPIC found
1393 * acpi_ioapic = 1 if IOAPIC found
1394 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1395 * if acpi_blacklisted() acpi_disabled = 1;
1396 * acpi_irq_model=...
1400 void __init acpi_boot_table_init(void)
1402 dmi_check_system(acpi_dmi_table);
1405 * If acpi_disabled, bail out
1411 * Initialize the ACPI boot-time table parser.
1413 if (acpi_table_init()) {
1418 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1421 * blacklist may disable ACPI entirely
1423 if (acpi_blacklisted()) {
1425 printk(KERN_WARNING PREFIX "acpi=force override\n");
1427 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1434 int __init early_acpi_boot_init(void)
1437 * If acpi_disabled, bail out
1443 * Process the Multiple APIC Description Table (MADT), if present
1445 early_acpi_process_madt();
1450 int __init acpi_boot_init(void)
1452 /* those are executed after early-quirks are executed */
1453 dmi_check_system(acpi_dmi_table_late);
1456 * If acpi_disabled, bail out
1461 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1464 * set sci_int and PM timer address
1466 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1469 * Process the Multiple APIC Description Table (MADT), if present
1471 acpi_process_madt();
1473 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1476 x86_init.pci.init = pci_acpi_init;
1481 static int __init parse_acpi(char *arg)
1486 /* "acpi=off" disables both ACPI table parsing and interpreter */
1487 if (strcmp(arg, "off") == 0) {
1490 /* acpi=force to over-ride black-list */
1491 else if (strcmp(arg, "force") == 0) {
1495 /* acpi=strict disables out-of-spec workarounds */
1496 else if (strcmp(arg, "strict") == 0) {
1499 /* acpi=rsdt use RSDT instead of XSDT */
1500 else if (strcmp(arg, "rsdt") == 0) {
1501 acpi_gbl_do_not_use_xsdt = TRUE;
1503 /* "acpi=noirq" disables ACPI interrupt routing */
1504 else if (strcmp(arg, "noirq") == 0) {
1507 /* "acpi=copy_dsdt" copys DSDT */
1508 else if (strcmp(arg, "copy_dsdt") == 0) {
1509 acpi_gbl_copy_dsdt_locally = 1;
1511 /* "acpi=nocmcff" disables FF mode for corrected errors */
1512 else if (strcmp(arg, "nocmcff") == 0) {
1513 acpi_disable_cmcff = 1;
1515 /* Core will printk when we return error. */
1520 early_param("acpi", parse_acpi);
1522 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1523 static int __init parse_pci(char *arg)
1525 if (arg && strcmp(arg, "noacpi") == 0)
1529 early_param("pci", parse_pci);
1531 int __init acpi_mps_check(void)
1533 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1534 /* mptable code is not built-in*/
1535 if (acpi_disabled || acpi_noirq) {
1536 printk(KERN_WARNING "MPS support code is not built-in.\n"
1537 "Using acpi=off or acpi=noirq or pci=noacpi "
1538 "may have problem\n");
1545 #ifdef CONFIG_X86_IO_APIC
1546 static int __init parse_acpi_skip_timer_override(char *arg)
1548 acpi_skip_timer_override = 1;
1551 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1553 static int __init parse_acpi_use_timer_override(char *arg)
1555 acpi_use_timer_override = 1;
1558 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1559 #endif /* CONFIG_X86_IO_APIC */
1561 static int __init setup_acpi_sci(char *s)
1565 if (!strcmp(s, "edge"))
1566 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1567 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1568 else if (!strcmp(s, "level"))
1569 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1570 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1571 else if (!strcmp(s, "high"))
1572 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1573 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1574 else if (!strcmp(s, "low"))
1575 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1576 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1581 early_param("acpi_sci", setup_acpi_sci);
1583 int __acpi_acquire_global_lock(unsigned int *lock)
1585 unsigned int old, new, val;
1588 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1589 val = cmpxchg(lock, old, new);
1590 } while (unlikely (val != old));
1591 return (new < 3) ? -1 : 0;
1594 int __acpi_release_global_lock(unsigned int *lock)
1596 unsigned int old, new, val;
1600 val = cmpxchg(lock, old, new);
1601 } while (unlikely (val != old));
1605 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1607 e820_add_region(addr, size, E820_ACPI);