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/slab.h>
35 #include <linux/bootmem.h>
36 #include <linux/ioport.h>
37 #include <linux/pci.h>
39 #include <asm/pci_x86.h>
40 #include <asm/pgtable.h>
41 #include <asm/io_apic.h>
44 #include <asm/mpspec.h>
46 #include <asm/i8259.h>
48 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
49 static int __initdata acpi_force = 0;
51 EXPORT_SYMBOL(acpi_disabled);
54 # include <asm/proto.h>
57 #define PREFIX "ACPI: "
59 int acpi_noirq; /* skip ACPI IRQ initialization */
60 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
61 EXPORT_SYMBOL(acpi_pci_disabled);
66 int acpi_disable_cmcff;
68 u8 acpi_sci_flags __initdata;
69 int acpi_sci_override_gsi __initdata;
70 int acpi_skip_timer_override __initdata;
71 int acpi_use_timer_override __initdata;
72 int acpi_fix_pin2_polarity __initdata;
74 #ifdef CONFIG_X86_LOCAL_APIC
75 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
78 #ifndef __HAVE_ARCH_CMPXCHG
79 #warning ACPI uses CMPXCHG, i486 and later hardware
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
101 #define ACPI_INVALID_GSI INT_MIN
103 static int map_gsi_to_irq(unsigned int gsi)
107 for (i = 0; i < nr_legacy_irqs(); i++)
108 if (isa_irq_to_gsi[i] == gsi)
111 return mp_map_gsi_to_irq(gsi);
115 * This is just a simple wrapper around early_ioremap(),
116 * with sanity checks for phys == 0 and size == 0.
118 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
124 return early_ioremap(phys, size);
127 void __init __acpi_unmap_table(char *map, unsigned long size)
132 early_iounmap(map, size);
135 #ifdef CONFIG_X86_LOCAL_APIC
136 static int __init acpi_parse_madt(struct acpi_table_header *table)
138 struct acpi_table_madt *madt = NULL;
143 madt = (struct acpi_table_madt *)table;
145 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
150 acpi_lapic_addr = (u64) madt->address;
152 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
156 default_acpi_madt_oem_check(madt->header.oem_id,
157 madt->header.oem_table_id);
163 * acpi_register_lapic - register a local apic and generates a logic cpu number
164 * @id: local apic id to register
165 * @enabled: this cpu is enabled or not
167 * Returns the logic cpu number which maps to the local apic
169 static int acpi_register_lapic(int id, u8 enabled)
171 unsigned int ver = 0;
173 if (id >= MAX_LOCAL_APIC) {
174 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
183 if (boot_cpu_physical_apicid != -1U)
184 ver = apic_version[boot_cpu_physical_apicid];
186 return generic_processor_info(id, ver);
190 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
192 struct acpi_madt_local_x2apic *processor = NULL;
196 processor = (struct acpi_madt_local_x2apic *)header;
198 if (BAD_MADT_ENTRY(processor, end))
201 acpi_table_print_madt_entry(header);
203 apic_id = processor->local_apic_id;
204 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
205 #ifdef CONFIG_X86_X2APIC
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) && enabled)
214 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
216 acpi_register_lapic(apic_id, enabled);
218 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
225 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
227 struct acpi_madt_local_apic *processor = NULL;
229 processor = (struct acpi_madt_local_apic *)header;
231 if (BAD_MADT_ENTRY(processor, end))
234 acpi_table_print_madt_entry(header);
237 * We need to register disabled CPU as well to permit
238 * counting disabled CPUs. This allows us to size
239 * cpus_possible_map more accurately, to permit
240 * to not preallocating memory for all NR_CPUS
241 * when we use CPU hotplug.
243 acpi_register_lapic(processor->id, /* APIC ID */
244 processor->lapic_flags & ACPI_MADT_ENABLED);
250 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
252 struct acpi_madt_local_sapic *processor = NULL;
254 processor = (struct acpi_madt_local_sapic *)header;
256 if (BAD_MADT_ENTRY(processor, end))
259 acpi_table_print_madt_entry(header);
261 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
262 processor->lapic_flags & ACPI_MADT_ENABLED);
268 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
269 const unsigned long end)
271 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
273 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
275 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
278 acpi_lapic_addr = lapic_addr_ovr->address;
284 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
285 const unsigned long end)
287 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
289 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
291 if (BAD_MADT_ENTRY(x2apic_nmi, end))
294 acpi_table_print_madt_entry(header);
296 if (x2apic_nmi->lint != 1)
297 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
303 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
305 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
307 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
309 if (BAD_MADT_ENTRY(lapic_nmi, end))
312 acpi_table_print_madt_entry(header);
314 if (lapic_nmi->lint != 1)
315 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
320 #endif /*CONFIG_X86_LOCAL_APIC */
322 #ifdef CONFIG_X86_IO_APIC
325 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
330 struct mpc_intsrc mp_irq;
333 * Convert 'gsi' to 'ioapic.pin'.
335 ioapic = mp_find_ioapic(gsi);
338 pin = mp_find_ioapic_pin(ioapic, gsi);
341 * TBD: This check is for faulty timer entries, where the override
342 * erroneously sets the trigger to level, resulting in a HUGE
343 * increase of timer interrupts!
345 if ((bus_irq == 0) && (trigger == 3))
348 mp_irq.type = MP_INTSRC;
349 mp_irq.irqtype = mp_INT;
350 mp_irq.irqflag = (trigger << 2) | polarity;
351 mp_irq.srcbus = MP_ISA_BUS;
352 mp_irq.srcbusirq = bus_irq; /* IRQ */
353 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
354 mp_irq.dstirq = pin; /* INTIN# */
356 mp_save_irq(&mp_irq);
359 * Reset default identity mapping if gsi is also an legacy IRQ,
360 * otherwise there will be more than one entry with the same GSI
361 * and acpi_isa_irq_to_gsi() may give wrong result.
363 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
364 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
365 isa_irq_to_gsi[bus_irq] = gsi;
368 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
371 #ifdef CONFIG_X86_MPPARSE
372 struct mpc_intsrc mp_irq;
373 struct pci_dev *pdev;
374 unsigned char number;
381 if (!dev || !dev_is_pci(dev))
384 pdev = to_pci_dev(dev);
385 number = pdev->bus->number;
388 /* print the entry should happen on mptable identically */
389 mp_irq.type = MP_INTSRC;
390 mp_irq.irqtype = mp_INT;
391 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
392 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
393 mp_irq.srcbus = number;
394 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
395 ioapic = mp_find_ioapic(gsi);
396 mp_irq.dstapic = mpc_ioapic_id(ioapic);
397 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
399 mp_save_irq(&mp_irq);
404 static int mp_register_gsi(struct device *dev, u32 gsi, int trigger,
410 struct io_apic_irq_attr irq_attr;
413 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
416 /* Don't set up the ACPI SCI because it's already set up */
417 if (acpi_gbl_FADT.sci_interrupt == gsi)
420 irq = map_gsi_to_irq(gsi);
424 ioapic = mp_find_ioapic(gsi);
426 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
430 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
432 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
433 printk(KERN_ERR "Invalid reference to IOAPIC pin "
434 "%d-%d\n", mpc_ioapic_id(ioapic),
439 if (enable_update_mptable)
440 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
442 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
443 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
444 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
445 ret = io_apic_set_pci_routing(dev, irq, &irq_attr);
453 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
455 struct acpi_madt_io_apic *ioapic = NULL;
457 ioapic = (struct acpi_madt_io_apic *)header;
459 if (BAD_MADT_ENTRY(ioapic, end))
462 acpi_table_print_madt_entry(header);
464 mp_register_ioapic(ioapic->id,
465 ioapic->address, ioapic->global_irq_base);
471 * Parse Interrupt Source Override for the ACPI SCI
473 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
475 if (trigger == 0) /* compatible SCI trigger is level */
478 if (polarity == 0) /* compatible SCI polarity is low */
481 /* Command-line over-ride via acpi_sci= */
482 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
483 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
485 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
486 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
488 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
491 * stash over-ride to indicate we've been here
492 * and for later update of acpi_gbl_FADT
494 acpi_sci_override_gsi = gsi;
499 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
500 const unsigned long end)
502 struct acpi_madt_interrupt_override *intsrc = NULL;
504 intsrc = (struct acpi_madt_interrupt_override *)header;
506 if (BAD_MADT_ENTRY(intsrc, end))
509 acpi_table_print_madt_entry(header);
511 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
512 acpi_sci_ioapic_setup(intsrc->source_irq,
513 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
514 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
519 if (intsrc->source_irq == 0) {
520 if (acpi_skip_timer_override) {
521 printk(PREFIX "BIOS IRQ0 override ignored.\n");
525 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
526 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
527 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
528 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
532 mp_override_legacy_irq(intsrc->source_irq,
533 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
534 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
541 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
543 struct acpi_madt_nmi_source *nmi_src = NULL;
545 nmi_src = (struct acpi_madt_nmi_source *)header;
547 if (BAD_MADT_ENTRY(nmi_src, end))
550 acpi_table_print_madt_entry(header);
552 /* TBD: Support nimsrc entries? */
557 #endif /* CONFIG_X86_IO_APIC */
560 * acpi_pic_sci_set_trigger()
562 * use ELCR to set PIC-mode trigger type for SCI
564 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
565 * it may require Edge Trigger -- use "acpi_sci=edge"
567 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
568 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
569 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
570 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
573 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
575 unsigned int mask = 1 << irq;
576 unsigned int old, new;
578 /* Real old ELCR mask */
579 old = inb(0x4d0) | (inb(0x4d1) << 8);
582 * If we use ACPI to set PCI IRQs, then we should clear ELCR
583 * since we will set it correctly as we enable the PCI irq
586 new = acpi_noirq ? old : 0;
589 * Update SCI information in the ELCR, it isn't in the PCI
593 case 1: /* Edge - clear */
596 case 3: /* Level - set */
604 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
606 outb(new >> 8, 0x4d1);
609 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
611 int irq = map_gsi_to_irq(gsi);
614 #ifdef CONFIG_X86_IO_APIC
615 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
616 setup_IO_APIC_irq_extra(gsi);
624 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
626 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
628 if (isa_irq < nr_legacy_irqs() &&
629 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
630 *gsi = isa_irq_to_gsi[isa_irq];
637 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
638 int trigger, int polarity)
642 * Make sure all (legacy) PCI IRQs are set as level-triggered.
644 if (trigger == ACPI_LEVEL_SENSITIVE)
645 eisa_set_level_irq(gsi);
651 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
652 int trigger, int polarity)
656 #ifdef CONFIG_X86_IO_APIC
657 irq = mp_register_gsi(dev, gsi, trigger, polarity);
663 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
664 int trigger, int polarity) = acpi_register_gsi_pic;
666 #ifdef CONFIG_ACPI_SLEEP
667 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
669 int (*acpi_suspend_lowlevel)(void);
673 * success: return IRQ number (>=0)
674 * failure: return < 0
676 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
678 return __acpi_register_gsi(dev, gsi, trigger, polarity);
680 EXPORT_SYMBOL_GPL(acpi_register_gsi);
682 void acpi_unregister_gsi(u32 gsi)
685 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
687 static void __init acpi_set_irq_model_ioapic(void)
689 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
690 __acpi_register_gsi = acpi_register_gsi_ioapic;
695 * ACPI based hotplug support for CPU
697 #ifdef CONFIG_ACPI_HOTPLUG_CPU
698 #include <acpi/processor.h>
700 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
702 #ifdef CONFIG_ACPI_NUMA
705 nid = acpi_get_node(handle);
707 set_apicid_to_node(physid, nid);
708 numa_set_node(cpu, nid);
713 static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
717 cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED);
719 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
723 acpi_processor_set_pdc(handle);
724 acpi_map_cpu2node(handle, cpu, physid);
730 /* wrapper to silence section mismatch warning */
731 int __ref acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
733 return _acpi_map_lsapic(handle, physid, pcpu);
735 EXPORT_SYMBOL(acpi_map_lsapic);
737 int acpi_unmap_lsapic(int cpu)
739 #ifdef CONFIG_ACPI_NUMA
740 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
743 per_cpu(x86_cpu_to_apicid, cpu) = -1;
744 set_cpu_present(cpu, false);
750 EXPORT_SYMBOL(acpi_unmap_lsapic);
751 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
753 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
759 EXPORT_SYMBOL(acpi_register_ioapic);
761 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
767 EXPORT_SYMBOL(acpi_unregister_ioapic);
769 static int __init acpi_parse_sbf(struct acpi_table_header *table)
771 struct acpi_table_boot *sb;
773 sb = (struct acpi_table_boot *)table;
775 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
779 sbf_port = sb->cmos_index; /* Save CMOS port */
784 #ifdef CONFIG_HPET_TIMER
785 #include <asm/hpet.h>
787 static struct resource *hpet_res __initdata;
789 static int __init acpi_parse_hpet(struct acpi_table_header *table)
791 struct acpi_table_hpet *hpet_tbl;
793 hpet_tbl = (struct acpi_table_hpet *)table;
795 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
799 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
800 printk(KERN_WARNING PREFIX "HPET timers must be located in "
805 hpet_address = hpet_tbl->address.address;
806 hpet_blockid = hpet_tbl->sequence;
809 * Some broken BIOSes advertise HPET at 0x0. We really do not
810 * want to allocate a resource there.
813 printk(KERN_WARNING PREFIX
814 "HPET id: %#x base: %#lx is invalid\n",
815 hpet_tbl->id, hpet_address);
820 * Some even more broken BIOSes advertise HPET at
821 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
824 if (hpet_address == 0xfed0000000000000UL) {
825 if (!hpet_force_user) {
826 printk(KERN_WARNING PREFIX "HPET id: %#x "
827 "base: 0xfed0000000000000 is bogus\n "
828 "try hpet=force on the kernel command line to "
829 "fix it up to 0xfed00000.\n", hpet_tbl->id);
833 printk(KERN_WARNING PREFIX
834 "HPET id: %#x base: 0xfed0000000000000 fixed up "
835 "to 0xfed00000.\n", hpet_tbl->id);
839 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
840 hpet_tbl->id, hpet_address);
843 * Allocate and initialize the HPET firmware resource for adding into
844 * the resource tree during the lateinit timeframe.
846 #define HPET_RESOURCE_NAME_SIZE 9
847 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
849 hpet_res->name = (void *)&hpet_res[1];
850 hpet_res->flags = IORESOURCE_MEM;
851 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
854 hpet_res->start = hpet_address;
855 hpet_res->end = hpet_address + (1 * 1024) - 1;
861 * hpet_insert_resource inserts the HPET resources used into the resource
864 static __init int hpet_insert_resource(void)
869 return insert_resource(&iomem_resource, hpet_res);
872 late_initcall(hpet_insert_resource);
875 #define acpi_parse_hpet NULL
878 static int __init acpi_parse_fadt(struct acpi_table_header *table)
881 #ifdef CONFIG_X86_PM_TIMER
882 /* detect the location of the ACPI PM Timer */
883 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
885 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
886 ACPI_ADR_SPACE_SYSTEM_IO)
889 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
891 * "X" fields are optional extensions to the original V1.0
892 * fields, so we must selectively expand V1.0 fields if the
893 * corresponding X field is zero.
896 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
899 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
902 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
908 #ifdef CONFIG_X86_LOCAL_APIC
910 * Parse LAPIC entries in MADT
911 * returns 0 on success, < 0 on error
914 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
922 * Note that the LAPIC address is obtained from the MADT (32-bit value)
923 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
926 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
927 acpi_parse_lapic_addr_ovr, 0);
929 printk(KERN_ERR PREFIX
930 "Error parsing LAPIC address override entry\n");
934 register_lapic_address(acpi_lapic_addr);
939 static int __init acpi_parse_madt_lapic_entries(void)
948 * Note that the LAPIC address is obtained from the MADT (32-bit value)
949 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
952 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
953 acpi_parse_lapic_addr_ovr, 0);
955 printk(KERN_ERR PREFIX
956 "Error parsing LAPIC address override entry\n");
960 register_lapic_address(acpi_lapic_addr);
962 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
963 acpi_parse_sapic, MAX_LOCAL_APIC);
966 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
967 acpi_parse_x2apic, MAX_LOCAL_APIC);
968 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
969 acpi_parse_lapic, MAX_LOCAL_APIC);
971 if (!count && !x2count) {
972 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
973 /* TBD: Cleanup to allow fallback to MPS */
975 } else if (count < 0 || x2count < 0) {
976 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
977 /* TBD: Cleanup to allow fallback to MPS */
981 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
982 acpi_parse_x2apic_nmi, 0);
983 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
984 acpi_parse_lapic_nmi, 0);
985 if (count < 0 || x2count < 0) {
986 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
987 /* TBD: Cleanup to allow fallback to MPS */
992 #endif /* CONFIG_X86_LOCAL_APIC */
994 #ifdef CONFIG_X86_IO_APIC
995 static void __init mp_config_acpi_legacy_irqs(void)
998 struct mpc_intsrc mp_irq;
1002 * Fabricate the legacy ISA bus (bus #31).
1004 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1006 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1007 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1010 * Use the default configuration for the IRQs 0-15. Unless
1011 * overridden by (MADT) interrupt source override entries.
1013 for (i = 0; i < nr_legacy_irqs(); i++) {
1015 unsigned int dstapic;
1019 /* Locate the gsi that irq i maps to. */
1020 if (acpi_isa_irq_to_gsi(i, &gsi))
1024 * Locate the IOAPIC that manages the ISA IRQ.
1026 ioapic = mp_find_ioapic(gsi);
1029 pin = mp_find_ioapic_pin(ioapic, gsi);
1030 dstapic = mpc_ioapic_id(ioapic);
1032 for (idx = 0; idx < mp_irq_entries; idx++) {
1033 struct mpc_intsrc *irq = mp_irqs + idx;
1035 /* Do we already have a mapping for this ISA IRQ? */
1036 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1039 /* Do we already have a mapping for this IOAPIC pin */
1040 if (irq->dstapic == dstapic && irq->dstirq == pin)
1044 if (idx != mp_irq_entries) {
1045 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1046 continue; /* IRQ already used */
1049 mp_irq.type = MP_INTSRC;
1050 mp_irq.irqflag = 0; /* Conforming */
1051 mp_irq.srcbus = MP_ISA_BUS;
1052 mp_irq.dstapic = dstapic;
1053 mp_irq.irqtype = mp_INT;
1054 mp_irq.srcbusirq = i; /* Identity mapped */
1055 mp_irq.dstirq = pin;
1057 mp_save_irq(&mp_irq);
1062 * Parse IOAPIC related entries in MADT
1063 * returns 0 on success, < 0 on error
1065 static int __init acpi_parse_madt_ioapic_entries(void)
1070 * ACPI interpreter is required to complete interrupt setup,
1071 * so if it is off, don't enumerate the io-apics with ACPI.
1072 * If MPS is present, it will handle them,
1073 * otherwise the system will stay in PIC mode
1075 if (acpi_disabled || acpi_noirq)
1082 * if "noapic" boot option, don't look for IO-APICs
1084 if (skip_ioapic_setup) {
1085 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1086 "due to 'noapic' option.\n");
1090 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1093 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1095 } else if (count < 0) {
1096 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1100 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1101 acpi_parse_int_src_ovr, nr_irqs);
1103 printk(KERN_ERR PREFIX
1104 "Error parsing interrupt source overrides entry\n");
1105 /* TBD: Cleanup to allow fallback to MPS */
1110 * If BIOS did not supply an INT_SRC_OVR for the SCI
1111 * pretend we got one so we can set the SCI flags.
1113 if (!acpi_sci_override_gsi)
1114 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1115 acpi_gbl_FADT.sci_interrupt);
1117 /* Fill in identity legacy mappings where no override */
1118 mp_config_acpi_legacy_irqs();
1120 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1121 acpi_parse_nmi_src, nr_irqs);
1123 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1124 /* TBD: Cleanup to allow fallback to MPS */
1131 static inline int acpi_parse_madt_ioapic_entries(void)
1135 #endif /* !CONFIG_X86_IO_APIC */
1137 static void __init early_acpi_process_madt(void)
1139 #ifdef CONFIG_X86_LOCAL_APIC
1142 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1145 * Parse MADT LAPIC entries
1147 error = early_acpi_parse_madt_lapic_addr_ovr();
1150 smp_found_config = 1;
1152 if (error == -EINVAL) {
1154 * Dell Precision Workstation 410, 610 come here.
1156 printk(KERN_ERR PREFIX
1157 "Invalid BIOS MADT, disabling ACPI\n");
1164 static void __init acpi_process_madt(void)
1166 #ifdef CONFIG_X86_LOCAL_APIC
1169 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1172 * Parse MADT LAPIC entries
1174 error = acpi_parse_madt_lapic_entries();
1179 * Parse MADT IO-APIC entries
1181 error = acpi_parse_madt_ioapic_entries();
1183 acpi_set_irq_model_ioapic();
1185 smp_found_config = 1;
1188 if (error == -EINVAL) {
1190 * Dell Precision Workstation 410, 610 come here.
1192 printk(KERN_ERR PREFIX
1193 "Invalid BIOS MADT, disabling ACPI\n");
1198 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1199 * In the event an MPS table was found, forget it.
1200 * Boot with "acpi=off" to use MPS on such a system.
1202 if (smp_found_config) {
1203 printk(KERN_WARNING PREFIX
1204 "No APIC-table, disabling MPS\n");
1205 smp_found_config = 0;
1210 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1211 * processors, where MPS only supports physical.
1213 if (acpi_lapic && acpi_ioapic)
1214 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1216 else if (acpi_lapic)
1217 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1218 "configuration information\n");
1223 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1226 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1233 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1236 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1243 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1246 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1250 "Warning: DMI blacklist says broken, but acpi forced\n");
1256 * Force ignoring BIOS IRQ0 override
1258 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1260 if (!acpi_skip_timer_override) {
1261 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1263 acpi_skip_timer_override = 1;
1269 * If your system is blacklisted here, but you find that acpi=force
1270 * works for you, please contact linux-acpi@vger.kernel.org
1272 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1274 * Boxes that need ACPI disabled
1277 .callback = dmi_disable_acpi,
1278 .ident = "IBM Thinkpad",
1280 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1281 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1286 * Boxes that need ACPI PCI IRQ routing disabled
1289 .callback = disable_acpi_irq,
1290 .ident = "ASUS A7V",
1292 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1293 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1294 /* newer BIOS, Revision 1011, does work */
1295 DMI_MATCH(DMI_BIOS_VERSION,
1296 "ASUS A7V ACPI BIOS Revision 1007"),
1301 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1302 * for LPC bridge, which is needed for the PCI
1303 * interrupt links to work. DSDT fix is in bug 5966.
1304 * 2645, 2646 model numbers are shared with 600/600E/600X
1306 .callback = disable_acpi_irq,
1307 .ident = "IBM Thinkpad 600 Series 2645",
1309 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1310 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1314 .callback = disable_acpi_irq,
1315 .ident = "IBM Thinkpad 600 Series 2646",
1317 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1318 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1322 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1325 .callback = disable_acpi_pci,
1326 .ident = "ASUS PR-DLS",
1328 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1329 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1330 DMI_MATCH(DMI_BIOS_VERSION,
1331 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1332 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1336 .callback = disable_acpi_pci,
1337 .ident = "Acer TravelMate 36x Laptop",
1339 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1340 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1346 /* second table for DMI checks that should run after early-quirks */
1347 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1349 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1350 * which includes some code which overrides all temperature
1351 * trip points to 16C if the INTIN2 input of the I/O APIC
1352 * is enabled. This input is incorrectly designated the
1353 * ISA IRQ 0 via an interrupt source override even though
1354 * it is wired to the output of the master 8259A and INTIN0
1355 * is not connected at all. Force ignoring BIOS IRQ0
1356 * override in that cases.
1359 .callback = dmi_ignore_irq0_timer_override,
1360 .ident = "HP nx6115 laptop",
1362 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1363 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1367 .callback = dmi_ignore_irq0_timer_override,
1368 .ident = "HP NX6125 laptop",
1370 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1371 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1375 .callback = dmi_ignore_irq0_timer_override,
1376 .ident = "HP NX6325 laptop",
1378 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1379 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1383 .callback = dmi_ignore_irq0_timer_override,
1384 .ident = "HP 6715b laptop",
1386 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1387 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1391 .callback = dmi_ignore_irq0_timer_override,
1392 .ident = "FUJITSU SIEMENS",
1394 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1395 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1402 * acpi_boot_table_init() and acpi_boot_init()
1403 * called from setup_arch(), always.
1404 * 1. checksums all tables
1405 * 2. enumerates lapics
1406 * 3. enumerates io-apics
1408 * acpi_table_init() is separate to allow reading SRAT without
1409 * other side effects.
1411 * side effects of acpi_boot_init:
1412 * acpi_lapic = 1 if LAPIC found
1413 * acpi_ioapic = 1 if IOAPIC found
1414 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1415 * if acpi_blacklisted() acpi_disabled = 1;
1416 * acpi_irq_model=...
1420 void __init acpi_boot_table_init(void)
1422 dmi_check_system(acpi_dmi_table);
1425 * If acpi_disabled, bail out
1431 * Initialize the ACPI boot-time table parser.
1433 if (acpi_table_init()) {
1438 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1441 * blacklist may disable ACPI entirely
1443 if (acpi_blacklisted()) {
1445 printk(KERN_WARNING PREFIX "acpi=force override\n");
1447 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1454 int __init early_acpi_boot_init(void)
1457 * If acpi_disabled, bail out
1463 * Process the Multiple APIC Description Table (MADT), if present
1465 early_acpi_process_madt();
1470 int __init acpi_boot_init(void)
1472 /* those are executed after early-quirks are executed */
1473 dmi_check_system(acpi_dmi_table_late);
1476 * If acpi_disabled, bail out
1481 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1484 * set sci_int and PM timer address
1486 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1489 * Process the Multiple APIC Description Table (MADT), if present
1491 acpi_process_madt();
1493 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1496 x86_init.pci.init = pci_acpi_init;
1501 static int __init parse_acpi(char *arg)
1506 /* "acpi=off" disables both ACPI table parsing and interpreter */
1507 if (strcmp(arg, "off") == 0) {
1510 /* acpi=force to over-ride black-list */
1511 else if (strcmp(arg, "force") == 0) {
1515 /* acpi=strict disables out-of-spec workarounds */
1516 else if (strcmp(arg, "strict") == 0) {
1519 /* acpi=rsdt use RSDT instead of XSDT */
1520 else if (strcmp(arg, "rsdt") == 0) {
1521 acpi_gbl_do_not_use_xsdt = TRUE;
1523 /* "acpi=noirq" disables ACPI interrupt routing */
1524 else if (strcmp(arg, "noirq") == 0) {
1527 /* "acpi=copy_dsdt" copys DSDT */
1528 else if (strcmp(arg, "copy_dsdt") == 0) {
1529 acpi_gbl_copy_dsdt_locally = 1;
1531 /* "acpi=nocmcff" disables FF mode for corrected errors */
1532 else if (strcmp(arg, "nocmcff") == 0) {
1533 acpi_disable_cmcff = 1;
1535 /* Core will printk when we return error. */
1540 early_param("acpi", parse_acpi);
1542 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1543 static int __init parse_pci(char *arg)
1545 if (arg && strcmp(arg, "noacpi") == 0)
1549 early_param("pci", parse_pci);
1551 int __init acpi_mps_check(void)
1553 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1554 /* mptable code is not built-in*/
1555 if (acpi_disabled || acpi_noirq) {
1556 printk(KERN_WARNING "MPS support code is not built-in.\n"
1557 "Using acpi=off or acpi=noirq or pci=noacpi "
1558 "may have problem\n");
1565 #ifdef CONFIG_X86_IO_APIC
1566 static int __init parse_acpi_skip_timer_override(char *arg)
1568 acpi_skip_timer_override = 1;
1571 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1573 static int __init parse_acpi_use_timer_override(char *arg)
1575 acpi_use_timer_override = 1;
1578 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1579 #endif /* CONFIG_X86_IO_APIC */
1581 static int __init setup_acpi_sci(char *s)
1585 if (!strcmp(s, "edge"))
1586 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1587 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1588 else if (!strcmp(s, "level"))
1589 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1590 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1591 else if (!strcmp(s, "high"))
1592 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1593 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1594 else if (!strcmp(s, "low"))
1595 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1596 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1601 early_param("acpi_sci", setup_acpi_sci);
1603 int __acpi_acquire_global_lock(unsigned int *lock)
1605 unsigned int old, new, val;
1608 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1609 val = cmpxchg(lock, old, new);
1610 } while (unlikely (val != old));
1611 return (new < 3) ? -1 : 0;
1614 int __acpi_release_global_lock(unsigned int *lock)
1616 unsigned int old, new, val;
1620 val = cmpxchg(lock, old, new);
1621 } while (unlikely (val != old));
1625 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1627 e820_add_region(addr, size, E820_ACPI);