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>
47 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
48 static int __initdata acpi_force = 0;
50 EXPORT_SYMBOL(acpi_disabled);
53 # include <asm/proto.h>
56 #define PREFIX "ACPI: "
58 int acpi_noirq; /* skip ACPI IRQ initialization */
59 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
60 EXPORT_SYMBOL(acpi_pci_disabled);
65 int acpi_disable_cmcff;
67 u8 acpi_sci_flags __initdata;
68 int acpi_sci_override_gsi __initdata;
69 int acpi_skip_timer_override __initdata;
70 int acpi_use_timer_override __initdata;
71 int acpi_fix_pin2_polarity __initdata;
73 #ifdef CONFIG_X86_LOCAL_APIC
74 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
77 #ifndef __HAVE_ARCH_CMPXCHG
78 #warning ACPI uses CMPXCHG, i486 and later hardware
81 /* --------------------------------------------------------------------------
82 Boot-time Configuration
83 -------------------------------------------------------------------------- */
86 * The default interrupt routing model is PIC (8259). This gets
87 * overridden if IOAPICs are enumerated (below).
89 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
93 * ISA irqs by default are the first 16 gsis but can be
94 * any gsi as specified by an interrupt source override.
96 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
97 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
100 static unsigned int gsi_to_irq(unsigned int gsi)
102 unsigned int irq = gsi + NR_IRQS_LEGACY;
105 for (i = 0; i < NR_IRQS_LEGACY; i++) {
106 if (isa_irq_to_gsi[i] == gsi) {
111 /* Provide an identity mapping of gsi == irq
112 * except on truly weird platforms that have
113 * non isa irqs in the first 16 gsis.
115 if (gsi >= NR_IRQS_LEGACY)
123 static u32 irq_to_gsi(int irq)
127 if (irq < NR_IRQS_LEGACY)
128 gsi = isa_irq_to_gsi[irq];
129 else if (irq < gsi_top)
131 else if (irq < (gsi_top + NR_IRQS_LEGACY))
140 * This is just a simple wrapper around early_ioremap(),
141 * with sanity checks for phys == 0 and size == 0.
143 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
149 return early_ioremap(phys, size);
152 void __init __acpi_unmap_table(char *map, unsigned long size)
157 early_iounmap(map, size);
160 #ifdef CONFIG_X86_LOCAL_APIC
161 static int __init acpi_parse_madt(struct acpi_table_header *table)
163 struct acpi_table_madt *madt = NULL;
168 madt = (struct acpi_table_madt *)table;
170 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
175 acpi_lapic_addr = (u64) madt->address;
177 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
181 default_acpi_madt_oem_check(madt->header.oem_id,
182 madt->header.oem_table_id);
188 * acpi_register_lapic - register a local apic and generates a logic cpu number
189 * @id: local apic id to register
190 * @enabled: this cpu is enabled or not
192 * Returns the logic cpu number which maps to the local apic
194 static int acpi_register_lapic(int id, u8 enabled)
196 unsigned int ver = 0;
198 if (id >= MAX_LOCAL_APIC) {
199 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
208 if (boot_cpu_physical_apicid != -1U)
209 ver = apic_version[boot_cpu_physical_apicid];
211 return generic_processor_info(id, ver);
215 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
217 struct acpi_madt_local_x2apic *processor = NULL;
221 processor = (struct acpi_madt_local_x2apic *)header;
223 if (BAD_MADT_ENTRY(processor, end))
226 acpi_table_print_madt_entry(header);
228 apic_id = processor->local_apic_id;
229 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
230 #ifdef CONFIG_X86_X2APIC
232 * We need to register disabled CPU as well to permit
233 * counting disabled CPUs. This allows us to size
234 * cpus_possible_map more accurately, to permit
235 * to not preallocating memory for all NR_CPUS
236 * when we use CPU hotplug.
238 if (!apic->apic_id_valid(apic_id) && enabled)
239 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
241 acpi_register_lapic(apic_id, enabled);
243 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
250 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
252 struct acpi_madt_local_apic *processor = NULL;
254 processor = (struct acpi_madt_local_apic *)header;
256 if (BAD_MADT_ENTRY(processor, end))
259 acpi_table_print_madt_entry(header);
262 * We need to register disabled CPU as well to permit
263 * counting disabled CPUs. This allows us to size
264 * cpus_possible_map more accurately, to permit
265 * to not preallocating memory for all NR_CPUS
266 * when we use CPU hotplug.
268 acpi_register_lapic(processor->id, /* APIC ID */
269 processor->lapic_flags & ACPI_MADT_ENABLED);
275 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
277 struct acpi_madt_local_sapic *processor = NULL;
279 processor = (struct acpi_madt_local_sapic *)header;
281 if (BAD_MADT_ENTRY(processor, end))
284 acpi_table_print_madt_entry(header);
286 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
287 processor->lapic_flags & ACPI_MADT_ENABLED);
293 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
294 const unsigned long end)
296 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
298 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
300 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
303 acpi_lapic_addr = lapic_addr_ovr->address;
309 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
310 const unsigned long end)
312 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
314 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
316 if (BAD_MADT_ENTRY(x2apic_nmi, end))
319 acpi_table_print_madt_entry(header);
321 if (x2apic_nmi->lint != 1)
322 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
328 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
330 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
332 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
334 if (BAD_MADT_ENTRY(lapic_nmi, end))
337 acpi_table_print_madt_entry(header);
339 if (lapic_nmi->lint != 1)
340 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
345 #endif /*CONFIG_X86_LOCAL_APIC */
347 #ifdef CONFIG_X86_IO_APIC
350 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
352 struct acpi_madt_io_apic *ioapic = NULL;
354 ioapic = (struct acpi_madt_io_apic *)header;
356 if (BAD_MADT_ENTRY(ioapic, end))
359 acpi_table_print_madt_entry(header);
361 mp_register_ioapic(ioapic->id,
362 ioapic->address, ioapic->global_irq_base);
368 * Parse Interrupt Source Override for the ACPI SCI
370 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
372 if (trigger == 0) /* compatible SCI trigger is level */
375 if (polarity == 0) /* compatible SCI polarity is low */
378 /* Command-line over-ride via acpi_sci= */
379 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
380 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
382 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
383 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
386 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
387 * If GSI is < 16, this will update its flags,
388 * else it will create a new mp_irqs[] entry.
390 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
393 * stash over-ride to indicate we've been here
394 * and for later update of acpi_gbl_FADT
396 acpi_sci_override_gsi = gsi;
401 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
402 const unsigned long end)
404 struct acpi_madt_interrupt_override *intsrc = NULL;
406 intsrc = (struct acpi_madt_interrupt_override *)header;
408 if (BAD_MADT_ENTRY(intsrc, end))
411 acpi_table_print_madt_entry(header);
413 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
414 acpi_sci_ioapic_setup(intsrc->source_irq,
415 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
416 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
421 if (intsrc->source_irq == 0) {
422 if (acpi_skip_timer_override) {
423 printk(PREFIX "BIOS IRQ0 override ignored.\n");
427 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
428 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
429 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
430 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
434 mp_override_legacy_irq(intsrc->source_irq,
435 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
436 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
443 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
445 struct acpi_madt_nmi_source *nmi_src = NULL;
447 nmi_src = (struct acpi_madt_nmi_source *)header;
449 if (BAD_MADT_ENTRY(nmi_src, end))
452 acpi_table_print_madt_entry(header);
454 /* TBD: Support nimsrc entries? */
459 #endif /* CONFIG_X86_IO_APIC */
462 * acpi_pic_sci_set_trigger()
464 * use ELCR to set PIC-mode trigger type for SCI
466 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
467 * it may require Edge Trigger -- use "acpi_sci=edge"
469 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
470 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
471 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
472 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
475 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
477 unsigned int mask = 1 << irq;
478 unsigned int old, new;
480 /* Real old ELCR mask */
481 old = inb(0x4d0) | (inb(0x4d1) << 8);
484 * If we use ACPI to set PCI IRQs, then we should clear ELCR
485 * since we will set it correctly as we enable the PCI irq
488 new = acpi_noirq ? old : 0;
491 * Update SCI information in the ELCR, it isn't in the PCI
495 case 1: /* Edge - clear */
498 case 3: /* Level - set */
506 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
508 outb(new >> 8, 0x4d1);
511 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
513 *irq = gsi_to_irq(gsi);
515 #ifdef CONFIG_X86_IO_APIC
516 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
517 setup_IO_APIC_irq_extra(gsi);
522 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
524 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
528 *gsi = irq_to_gsi(isa_irq);
532 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
533 int trigger, int polarity)
537 * Make sure all (legacy) PCI IRQs are set as level-triggered.
539 if (trigger == ACPI_LEVEL_SENSITIVE)
540 eisa_set_level_irq(gsi);
546 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
547 int trigger, int polarity)
549 #ifdef CONFIG_X86_IO_APIC
550 gsi = mp_register_gsi(dev, gsi, trigger, polarity);
556 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
557 int trigger, int polarity) = acpi_register_gsi_pic;
559 #ifdef CONFIG_ACPI_SLEEP
560 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
562 int (*acpi_suspend_lowlevel)(void);
566 * success: return IRQ number (>=0)
567 * failure: return < 0
569 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
572 unsigned int plat_gsi = gsi;
574 plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity);
575 irq = gsi_to_irq(plat_gsi);
579 EXPORT_SYMBOL_GPL(acpi_register_gsi);
581 void acpi_unregister_gsi(u32 gsi)
584 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
586 void __init acpi_set_irq_model_pic(void)
588 acpi_irq_model = ACPI_IRQ_MODEL_PIC;
589 __acpi_register_gsi = acpi_register_gsi_pic;
593 void __init acpi_set_irq_model_ioapic(void)
595 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
596 __acpi_register_gsi = acpi_register_gsi_ioapic;
601 * ACPI based hotplug support for CPU
603 #ifdef CONFIG_ACPI_HOTPLUG_CPU
604 #include <acpi/processor.h>
606 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
608 #ifdef CONFIG_ACPI_NUMA
611 nid = acpi_get_node(handle);
613 set_apicid_to_node(physid, nid);
614 numa_set_node(cpu, nid);
619 static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
623 cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED);
625 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
629 acpi_processor_set_pdc(handle);
630 acpi_map_cpu2node(handle, cpu, physid);
636 /* wrapper to silence section mismatch warning */
637 int __ref acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
639 return _acpi_map_lsapic(handle, physid, pcpu);
641 EXPORT_SYMBOL(acpi_map_lsapic);
643 int acpi_unmap_lsapic(int cpu)
645 #ifdef CONFIG_ACPI_NUMA
646 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
649 per_cpu(x86_cpu_to_apicid, cpu) = -1;
650 set_cpu_present(cpu, false);
656 EXPORT_SYMBOL(acpi_unmap_lsapic);
657 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
659 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
665 EXPORT_SYMBOL(acpi_register_ioapic);
667 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
673 EXPORT_SYMBOL(acpi_unregister_ioapic);
675 static int __init acpi_parse_sbf(struct acpi_table_header *table)
677 struct acpi_table_boot *sb;
679 sb = (struct acpi_table_boot *)table;
681 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
685 sbf_port = sb->cmos_index; /* Save CMOS port */
690 #ifdef CONFIG_HPET_TIMER
691 #include <asm/hpet.h>
693 static struct resource *hpet_res __initdata;
695 static int __init acpi_parse_hpet(struct acpi_table_header *table)
697 struct acpi_table_hpet *hpet_tbl;
699 hpet_tbl = (struct acpi_table_hpet *)table;
701 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
705 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
706 printk(KERN_WARNING PREFIX "HPET timers must be located in "
711 hpet_address = hpet_tbl->address.address;
712 hpet_blockid = hpet_tbl->sequence;
715 * Some broken BIOSes advertise HPET at 0x0. We really do not
716 * want to allocate a resource there.
719 printk(KERN_WARNING PREFIX
720 "HPET id: %#x base: %#lx is invalid\n",
721 hpet_tbl->id, hpet_address);
726 * Some even more broken BIOSes advertise HPET at
727 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
730 if (hpet_address == 0xfed0000000000000UL) {
731 if (!hpet_force_user) {
732 printk(KERN_WARNING PREFIX "HPET id: %#x "
733 "base: 0xfed0000000000000 is bogus\n "
734 "try hpet=force on the kernel command line to "
735 "fix it up to 0xfed00000.\n", hpet_tbl->id);
739 printk(KERN_WARNING PREFIX
740 "HPET id: %#x base: 0xfed0000000000000 fixed up "
741 "to 0xfed00000.\n", hpet_tbl->id);
745 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
746 hpet_tbl->id, hpet_address);
749 * Allocate and initialize the HPET firmware resource for adding into
750 * the resource tree during the lateinit timeframe.
752 #define HPET_RESOURCE_NAME_SIZE 9
753 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
755 hpet_res->name = (void *)&hpet_res[1];
756 hpet_res->flags = IORESOURCE_MEM;
757 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
760 hpet_res->start = hpet_address;
761 hpet_res->end = hpet_address + (1 * 1024) - 1;
767 * hpet_insert_resource inserts the HPET resources used into the resource
770 static __init int hpet_insert_resource(void)
775 return insert_resource(&iomem_resource, hpet_res);
778 late_initcall(hpet_insert_resource);
781 #define acpi_parse_hpet NULL
784 static int __init acpi_parse_fadt(struct acpi_table_header *table)
787 #ifdef CONFIG_X86_PM_TIMER
788 /* detect the location of the ACPI PM Timer */
789 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
791 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
792 ACPI_ADR_SPACE_SYSTEM_IO)
795 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
797 * "X" fields are optional extensions to the original V1.0
798 * fields, so we must selectively expand V1.0 fields if the
799 * corresponding X field is zero.
802 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
805 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
808 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
814 #ifdef CONFIG_X86_LOCAL_APIC
816 * Parse LAPIC entries in MADT
817 * returns 0 on success, < 0 on error
820 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
828 * Note that the LAPIC address is obtained from the MADT (32-bit value)
829 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
833 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
834 acpi_parse_lapic_addr_ovr, 0);
836 printk(KERN_ERR PREFIX
837 "Error parsing LAPIC address override entry\n");
841 register_lapic_address(acpi_lapic_addr);
846 static int __init acpi_parse_madt_lapic_entries(void)
855 * Note that the LAPIC address is obtained from the MADT (32-bit value)
856 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
860 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
861 acpi_parse_lapic_addr_ovr, 0);
863 printk(KERN_ERR PREFIX
864 "Error parsing LAPIC address override entry\n");
868 register_lapic_address(acpi_lapic_addr);
870 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
871 acpi_parse_sapic, MAX_LOCAL_APIC);
874 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
875 acpi_parse_x2apic, MAX_LOCAL_APIC);
876 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
877 acpi_parse_lapic, MAX_LOCAL_APIC);
879 if (!count && !x2count) {
880 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
881 /* TBD: Cleanup to allow fallback to MPS */
883 } else if (count < 0 || x2count < 0) {
884 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
885 /* TBD: Cleanup to allow fallback to MPS */
890 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
891 acpi_parse_x2apic_nmi, 0);
893 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
894 if (count < 0 || x2count < 0) {
895 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
896 /* TBD: Cleanup to allow fallback to MPS */
901 #endif /* CONFIG_X86_LOCAL_APIC */
903 #ifdef CONFIG_X86_IO_APIC
906 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
910 struct mpc_intsrc mp_irq;
913 * Convert 'gsi' to 'ioapic.pin'.
915 ioapic = mp_find_ioapic(gsi);
918 pin = mp_find_ioapic_pin(ioapic, gsi);
921 * TBD: This check is for faulty timer entries, where the override
922 * erroneously sets the trigger to level, resulting in a HUGE
923 * increase of timer interrupts!
925 if ((bus_irq == 0) && (trigger == 3))
928 mp_irq.type = MP_INTSRC;
929 mp_irq.irqtype = mp_INT;
930 mp_irq.irqflag = (trigger << 2) | polarity;
931 mp_irq.srcbus = MP_ISA_BUS;
932 mp_irq.srcbusirq = bus_irq; /* IRQ */
933 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
934 mp_irq.dstirq = pin; /* INTIN# */
936 mp_save_irq(&mp_irq);
938 isa_irq_to_gsi[bus_irq] = gsi;
941 void __init mp_config_acpi_legacy_irqs(void)
944 struct mpc_intsrc mp_irq;
948 * Fabricate the legacy ISA bus (bus #31).
950 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
952 set_bit(MP_ISA_BUS, mp_bus_not_pci);
953 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
956 * Use the default configuration for the IRQs 0-15. Unless
957 * overridden by (MADT) interrupt source override entries.
959 for (i = 0; i < 16; i++) {
961 unsigned int dstapic;
965 /* Locate the gsi that irq i maps to. */
966 if (acpi_isa_irq_to_gsi(i, &gsi))
970 * Locate the IOAPIC that manages the ISA IRQ.
972 ioapic = mp_find_ioapic(gsi);
975 pin = mp_find_ioapic_pin(ioapic, gsi);
976 dstapic = mpc_ioapic_id(ioapic);
978 for (idx = 0; idx < mp_irq_entries; idx++) {
979 struct mpc_intsrc *irq = mp_irqs + idx;
981 /* Do we already have a mapping for this ISA IRQ? */
982 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
985 /* Do we already have a mapping for this IOAPIC pin */
986 if (irq->dstapic == dstapic && irq->dstirq == pin)
990 if (idx != mp_irq_entries) {
991 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
992 continue; /* IRQ already used */
995 mp_irq.type = MP_INTSRC;
996 mp_irq.irqflag = 0; /* Conforming */
997 mp_irq.srcbus = MP_ISA_BUS;
998 mp_irq.dstapic = dstapic;
999 mp_irq.irqtype = mp_INT;
1000 mp_irq.srcbusirq = i; /* Identity mapped */
1001 mp_irq.dstirq = pin;
1003 mp_save_irq(&mp_irq);
1007 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1010 #ifdef CONFIG_X86_MPPARSE
1011 struct mpc_intsrc mp_irq;
1012 struct pci_dev *pdev;
1013 unsigned char number;
1020 if (!dev || !dev_is_pci(dev))
1023 pdev = to_pci_dev(dev);
1024 number = pdev->bus->number;
1025 devfn = pdev->devfn;
1027 /* print the entry should happen on mptable identically */
1028 mp_irq.type = MP_INTSRC;
1029 mp_irq.irqtype = mp_INT;
1030 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1031 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1032 mp_irq.srcbus = number;
1033 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1034 ioapic = mp_find_ioapic(gsi);
1035 mp_irq.dstapic = mpc_ioapic_id(ioapic);
1036 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1038 mp_save_irq(&mp_irq);
1043 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1047 struct io_apic_irq_attr irq_attr;
1050 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1053 /* Don't set up the ACPI SCI because it's already set up */
1054 if (acpi_gbl_FADT.sci_interrupt == gsi)
1057 ioapic = mp_find_ioapic(gsi);
1059 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1063 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1065 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1066 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1067 "%d-%d\n", mpc_ioapic_id(ioapic),
1072 if (enable_update_mptable)
1073 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1075 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1076 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1077 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1078 ret = io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
1086 * Parse IOAPIC related entries in MADT
1087 * returns 0 on success, < 0 on error
1089 static int __init acpi_parse_madt_ioapic_entries(void)
1094 * ACPI interpreter is required to complete interrupt setup,
1095 * so if it is off, don't enumerate the io-apics with ACPI.
1096 * If MPS is present, it will handle them,
1097 * otherwise the system will stay in PIC mode
1099 if (acpi_disabled || acpi_noirq)
1106 * if "noapic" boot option, don't look for IO-APICs
1108 if (skip_ioapic_setup) {
1109 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1110 "due to 'noapic' option.\n");
1115 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1118 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1120 } else if (count < 0) {
1121 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1126 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1129 printk(KERN_ERR PREFIX
1130 "Error parsing interrupt source overrides entry\n");
1131 /* TBD: Cleanup to allow fallback to MPS */
1136 * If BIOS did not supply an INT_SRC_OVR for the SCI
1137 * pretend we got one so we can set the SCI flags.
1139 if (!acpi_sci_override_gsi)
1140 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1141 acpi_gbl_FADT.sci_interrupt);
1143 /* Fill in identity legacy mappings where no override */
1144 mp_config_acpi_legacy_irqs();
1147 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1150 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1151 /* TBD: Cleanup to allow fallback to MPS */
1158 static inline int acpi_parse_madt_ioapic_entries(void)
1162 #endif /* !CONFIG_X86_IO_APIC */
1164 static void __init early_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 = early_acpi_parse_madt_lapic_addr_ovr();
1177 smp_found_config = 1;
1179 if (error == -EINVAL) {
1181 * Dell Precision Workstation 410, 610 come here.
1183 printk(KERN_ERR PREFIX
1184 "Invalid BIOS MADT, disabling ACPI\n");
1191 static void __init acpi_process_madt(void)
1193 #ifdef CONFIG_X86_LOCAL_APIC
1196 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1199 * Parse MADT LAPIC entries
1201 error = acpi_parse_madt_lapic_entries();
1206 * Parse MADT IO-APIC entries
1208 error = acpi_parse_madt_ioapic_entries();
1210 acpi_set_irq_model_ioapic();
1212 smp_found_config = 1;
1215 if (error == -EINVAL) {
1217 * Dell Precision Workstation 410, 610 come here.
1219 printk(KERN_ERR PREFIX
1220 "Invalid BIOS MADT, disabling ACPI\n");
1225 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1226 * In the event an MPS table was found, forget it.
1227 * Boot with "acpi=off" to use MPS on such a system.
1229 if (smp_found_config) {
1230 printk(KERN_WARNING PREFIX
1231 "No APIC-table, disabling MPS\n");
1232 smp_found_config = 0;
1237 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1238 * processors, where MPS only supports physical.
1240 if (acpi_lapic && acpi_ioapic)
1241 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1243 else if (acpi_lapic)
1244 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1245 "configuration information\n");
1250 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1253 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1260 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1263 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1270 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1273 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1277 "Warning: DMI blacklist says broken, but acpi forced\n");
1283 * Force ignoring BIOS IRQ0 override
1285 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1287 if (!acpi_skip_timer_override) {
1288 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1290 acpi_skip_timer_override = 1;
1296 * If your system is blacklisted here, but you find that acpi=force
1297 * works for you, please contact linux-acpi@vger.kernel.org
1299 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1301 * Boxes that need ACPI disabled
1304 .callback = dmi_disable_acpi,
1305 .ident = "IBM Thinkpad",
1307 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1308 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1313 * Boxes that need ACPI PCI IRQ routing disabled
1316 .callback = disable_acpi_irq,
1317 .ident = "ASUS A7V",
1319 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1320 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1321 /* newer BIOS, Revision 1011, does work */
1322 DMI_MATCH(DMI_BIOS_VERSION,
1323 "ASUS A7V ACPI BIOS Revision 1007"),
1328 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1329 * for LPC bridge, which is needed for the PCI
1330 * interrupt links to work. DSDT fix is in bug 5966.
1331 * 2645, 2646 model numbers are shared with 600/600E/600X
1333 .callback = disable_acpi_irq,
1334 .ident = "IBM Thinkpad 600 Series 2645",
1336 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1337 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1341 .callback = disable_acpi_irq,
1342 .ident = "IBM Thinkpad 600 Series 2646",
1344 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1345 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1349 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1352 .callback = disable_acpi_pci,
1353 .ident = "ASUS PR-DLS",
1355 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1356 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1357 DMI_MATCH(DMI_BIOS_VERSION,
1358 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1359 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1363 .callback = disable_acpi_pci,
1364 .ident = "Acer TravelMate 36x Laptop",
1366 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1367 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1373 /* second table for DMI checks that should run after early-quirks */
1374 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1376 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1377 * which includes some code which overrides all temperature
1378 * trip points to 16C if the INTIN2 input of the I/O APIC
1379 * is enabled. This input is incorrectly designated the
1380 * ISA IRQ 0 via an interrupt source override even though
1381 * it is wired to the output of the master 8259A and INTIN0
1382 * is not connected at all. Force ignoring BIOS IRQ0
1383 * override in that cases.
1386 .callback = dmi_ignore_irq0_timer_override,
1387 .ident = "HP nx6115 laptop",
1389 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1390 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1394 .callback = dmi_ignore_irq0_timer_override,
1395 .ident = "HP NX6125 laptop",
1397 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1398 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1402 .callback = dmi_ignore_irq0_timer_override,
1403 .ident = "HP NX6325 laptop",
1405 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1406 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1410 .callback = dmi_ignore_irq0_timer_override,
1411 .ident = "HP 6715b laptop",
1413 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1414 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1418 .callback = dmi_ignore_irq0_timer_override,
1419 .ident = "FUJITSU SIEMENS",
1421 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1422 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1429 * acpi_boot_table_init() and acpi_boot_init()
1430 * called from setup_arch(), always.
1431 * 1. checksums all tables
1432 * 2. enumerates lapics
1433 * 3. enumerates io-apics
1435 * acpi_table_init() is separate to allow reading SRAT without
1436 * other side effects.
1438 * side effects of acpi_boot_init:
1439 * acpi_lapic = 1 if LAPIC found
1440 * acpi_ioapic = 1 if IOAPIC found
1441 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1442 * if acpi_blacklisted() acpi_disabled = 1;
1443 * acpi_irq_model=...
1447 void __init acpi_boot_table_init(void)
1449 dmi_check_system(acpi_dmi_table);
1452 * If acpi_disabled, bail out
1458 * Initialize the ACPI boot-time table parser.
1460 if (acpi_table_init()) {
1465 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1468 * blacklist may disable ACPI entirely
1470 if (acpi_blacklisted()) {
1472 printk(KERN_WARNING PREFIX "acpi=force override\n");
1474 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1481 int __init early_acpi_boot_init(void)
1484 * If acpi_disabled, bail out
1490 * Process the Multiple APIC Description Table (MADT), if present
1492 early_acpi_process_madt();
1497 int __init acpi_boot_init(void)
1499 /* those are executed after early-quirks are executed */
1500 dmi_check_system(acpi_dmi_table_late);
1503 * If acpi_disabled, bail out
1508 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1511 * set sci_int and PM timer address
1513 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1516 * Process the Multiple APIC Description Table (MADT), if present
1518 acpi_process_madt();
1520 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1523 x86_init.pci.init = pci_acpi_init;
1528 static int __init parse_acpi(char *arg)
1533 /* "acpi=off" disables both ACPI table parsing and interpreter */
1534 if (strcmp(arg, "off") == 0) {
1537 /* acpi=force to over-ride black-list */
1538 else if (strcmp(arg, "force") == 0) {
1542 /* acpi=strict disables out-of-spec workarounds */
1543 else if (strcmp(arg, "strict") == 0) {
1546 /* acpi=rsdt use RSDT instead of XSDT */
1547 else if (strcmp(arg, "rsdt") == 0) {
1548 acpi_gbl_do_not_use_xsdt = TRUE;
1550 /* "acpi=noirq" disables ACPI interrupt routing */
1551 else if (strcmp(arg, "noirq") == 0) {
1554 /* "acpi=copy_dsdt" copys DSDT */
1555 else if (strcmp(arg, "copy_dsdt") == 0) {
1556 acpi_gbl_copy_dsdt_locally = 1;
1558 /* "acpi=nocmcff" disables FF mode for corrected errors */
1559 else if (strcmp(arg, "nocmcff") == 0) {
1560 acpi_disable_cmcff = 1;
1562 /* Core will printk when we return error. */
1567 early_param("acpi", parse_acpi);
1569 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1570 static int __init parse_pci(char *arg)
1572 if (arg && strcmp(arg, "noacpi") == 0)
1576 early_param("pci", parse_pci);
1578 int __init acpi_mps_check(void)
1580 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1581 /* mptable code is not built-in*/
1582 if (acpi_disabled || acpi_noirq) {
1583 printk(KERN_WARNING "MPS support code is not built-in.\n"
1584 "Using acpi=off or acpi=noirq or pci=noacpi "
1585 "may have problem\n");
1592 #ifdef CONFIG_X86_IO_APIC
1593 static int __init parse_acpi_skip_timer_override(char *arg)
1595 acpi_skip_timer_override = 1;
1598 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1600 static int __init parse_acpi_use_timer_override(char *arg)
1602 acpi_use_timer_override = 1;
1605 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1606 #endif /* CONFIG_X86_IO_APIC */
1608 static int __init setup_acpi_sci(char *s)
1612 if (!strcmp(s, "edge"))
1613 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1614 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1615 else if (!strcmp(s, "level"))
1616 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1617 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1618 else if (!strcmp(s, "high"))
1619 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1620 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1621 else if (!strcmp(s, "low"))
1622 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1623 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1628 early_param("acpi_sci", setup_acpi_sci);
1630 int __acpi_acquire_global_lock(unsigned int *lock)
1632 unsigned int old, new, val;
1635 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1636 val = cmpxchg(lock, old, new);
1637 } while (unlikely (val != old));
1638 return (new < 3) ? -1 : 0;
1641 int __acpi_release_global_lock(unsigned int *lock)
1643 unsigned int old, new, val;
1647 val = cmpxchg(lock, old, new);
1648 } while (unlikely (val != old));
1652 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1654 e820_add_region(addr, size, E820_ACPI);