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;
51 EXPORT_SYMBOL(acpi_disabled);
54 # include <asm/proto.h>
57 #define BAD_MADT_ENTRY(entry, end) ( \
58 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
59 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
61 #define PREFIX "ACPI: "
63 int acpi_noirq; /* skip ACPI IRQ initialization */
64 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
65 EXPORT_SYMBOL(acpi_pci_disabled);
70 int acpi_disable_cmcff;
72 u8 acpi_sci_flags __initdata;
73 int acpi_sci_override_gsi __initdata;
74 int acpi_skip_timer_override __initdata;
75 int acpi_use_timer_override __initdata;
76 int acpi_fix_pin2_polarity __initdata;
78 #ifdef CONFIG_X86_LOCAL_APIC
79 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
82 #ifndef __HAVE_ARCH_CMPXCHG
83 #warning ACPI uses CMPXCHG, i486 and later hardware
86 /* --------------------------------------------------------------------------
87 Boot-time Configuration
88 -------------------------------------------------------------------------- */
91 * The default interrupt routing model is PIC (8259). This gets
92 * overridden if IOAPICs are enumerated (below).
94 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
98 * ISA irqs by default are the first 16 gsis but can be
99 * any gsi as specified by an interrupt source override.
101 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
102 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
105 static unsigned int gsi_to_irq(unsigned int gsi)
107 unsigned int irq = gsi + NR_IRQS_LEGACY;
110 for (i = 0; i < NR_IRQS_LEGACY; i++) {
111 if (isa_irq_to_gsi[i] == gsi) {
116 /* Provide an identity mapping of gsi == irq
117 * except on truly weird platforms that have
118 * non isa irqs in the first 16 gsis.
120 if (gsi >= NR_IRQS_LEGACY)
128 static u32 irq_to_gsi(int irq)
132 if (irq < NR_IRQS_LEGACY)
133 gsi = isa_irq_to_gsi[irq];
134 else if (irq < gsi_top)
136 else if (irq < (gsi_top + NR_IRQS_LEGACY))
145 * This is just a simple wrapper around early_ioremap(),
146 * with sanity checks for phys == 0 and size == 0.
148 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
154 return early_ioremap(phys, size);
157 void __init __acpi_unmap_table(char *map, unsigned long size)
162 early_iounmap(map, size);
165 #ifdef CONFIG_X86_LOCAL_APIC
166 static int __init acpi_parse_madt(struct acpi_table_header *table)
168 struct acpi_table_madt *madt = NULL;
173 madt = (struct acpi_table_madt *)table;
175 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
180 acpi_lapic_addr = (u64) madt->address;
182 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
186 default_acpi_madt_oem_check(madt->header.oem_id,
187 madt->header.oem_table_id);
193 * acpi_register_lapic - register a local apic and generates a logic cpu number
194 * @id: local apic id to register
195 * @enabled: this cpu is enabled or not
197 * Returns the logic cpu number which maps to the local apic
199 static int acpi_register_lapic(int id, u8 enabled)
201 unsigned int ver = 0;
203 if (id >= MAX_LOCAL_APIC) {
204 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
213 if (boot_cpu_physical_apicid != -1U)
214 ver = apic_version[boot_cpu_physical_apicid];
216 return generic_processor_info(id, ver);
220 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
222 struct acpi_madt_local_x2apic *processor = NULL;
226 processor = (struct acpi_madt_local_x2apic *)header;
228 if (BAD_MADT_ENTRY(processor, end))
231 acpi_table_print_madt_entry(header);
233 apic_id = processor->local_apic_id;
234 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
235 #ifdef CONFIG_X86_X2APIC
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 if (!apic->apic_id_valid(apic_id) && enabled)
244 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
246 acpi_register_lapic(apic_id, enabled);
248 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
255 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
257 struct acpi_madt_local_apic *processor = NULL;
259 processor = (struct acpi_madt_local_apic *)header;
261 if (BAD_MADT_ENTRY(processor, end))
264 acpi_table_print_madt_entry(header);
267 * We need to register disabled CPU as well to permit
268 * counting disabled CPUs. This allows us to size
269 * cpus_possible_map more accurately, to permit
270 * to not preallocating memory for all NR_CPUS
271 * when we use CPU hotplug.
273 acpi_register_lapic(processor->id, /* APIC ID */
274 processor->lapic_flags & ACPI_MADT_ENABLED);
280 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
282 struct acpi_madt_local_sapic *processor = NULL;
284 processor = (struct acpi_madt_local_sapic *)header;
286 if (BAD_MADT_ENTRY(processor, end))
289 acpi_table_print_madt_entry(header);
291 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
292 processor->lapic_flags & ACPI_MADT_ENABLED);
298 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
299 const unsigned long end)
301 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
303 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
305 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
308 acpi_lapic_addr = lapic_addr_ovr->address;
314 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
315 const unsigned long end)
317 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
319 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
321 if (BAD_MADT_ENTRY(x2apic_nmi, end))
324 acpi_table_print_madt_entry(header);
326 if (x2apic_nmi->lint != 1)
327 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
333 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
335 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
337 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
339 if (BAD_MADT_ENTRY(lapic_nmi, end))
342 acpi_table_print_madt_entry(header);
344 if (lapic_nmi->lint != 1)
345 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
350 #endif /*CONFIG_X86_LOCAL_APIC */
352 #ifdef CONFIG_X86_IO_APIC
355 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
357 struct acpi_madt_io_apic *ioapic = NULL;
359 ioapic = (struct acpi_madt_io_apic *)header;
361 if (BAD_MADT_ENTRY(ioapic, end))
364 acpi_table_print_madt_entry(header);
366 mp_register_ioapic(ioapic->id,
367 ioapic->address, ioapic->global_irq_base);
373 * Parse Interrupt Source Override for the ACPI SCI
375 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
377 if (trigger == 0) /* compatible SCI trigger is level */
380 if (polarity == 0) /* compatible SCI polarity is low */
383 /* Command-line over-ride via acpi_sci= */
384 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
385 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
387 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
388 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
391 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
392 * If GSI is < 16, this will update its flags,
393 * else it will create a new mp_irqs[] entry.
395 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
398 * stash over-ride to indicate we've been here
399 * and for later update of acpi_gbl_FADT
401 acpi_sci_override_gsi = gsi;
406 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
407 const unsigned long end)
409 struct acpi_madt_interrupt_override *intsrc = NULL;
411 intsrc = (struct acpi_madt_interrupt_override *)header;
413 if (BAD_MADT_ENTRY(intsrc, end))
416 acpi_table_print_madt_entry(header);
418 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
419 acpi_sci_ioapic_setup(intsrc->source_irq,
420 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
421 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
426 if (intsrc->source_irq == 0) {
427 if (acpi_skip_timer_override) {
428 printk(PREFIX "BIOS IRQ0 override ignored.\n");
432 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
433 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
434 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
435 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
439 mp_override_legacy_irq(intsrc->source_irq,
440 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
441 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
448 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
450 struct acpi_madt_nmi_source *nmi_src = NULL;
452 nmi_src = (struct acpi_madt_nmi_source *)header;
454 if (BAD_MADT_ENTRY(nmi_src, end))
457 acpi_table_print_madt_entry(header);
459 /* TBD: Support nimsrc entries? */
464 #endif /* CONFIG_X86_IO_APIC */
467 * acpi_pic_sci_set_trigger()
469 * use ELCR to set PIC-mode trigger type for SCI
471 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
472 * it may require Edge Trigger -- use "acpi_sci=edge"
474 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
475 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
476 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
477 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
480 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
482 unsigned int mask = 1 << irq;
483 unsigned int old, new;
485 /* Real old ELCR mask */
486 old = inb(0x4d0) | (inb(0x4d1) << 8);
489 * If we use ACPI to set PCI IRQs, then we should clear ELCR
490 * since we will set it correctly as we enable the PCI irq
493 new = acpi_noirq ? old : 0;
496 * Update SCI information in the ELCR, it isn't in the PCI
500 case 1: /* Edge - clear */
503 case 3: /* Level - set */
511 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
513 outb(new >> 8, 0x4d1);
516 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
518 *irq = gsi_to_irq(gsi);
520 #ifdef CONFIG_X86_IO_APIC
521 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
522 setup_IO_APIC_irq_extra(gsi);
527 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
529 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
533 *gsi = irq_to_gsi(isa_irq);
537 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
538 int trigger, int polarity)
542 * Make sure all (legacy) PCI IRQs are set as level-triggered.
544 if (trigger == ACPI_LEVEL_SENSITIVE)
545 eisa_set_level_irq(gsi);
551 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
552 int trigger, int polarity)
554 #ifdef CONFIG_X86_IO_APIC
555 gsi = mp_register_gsi(dev, gsi, trigger, polarity);
561 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
562 int trigger, int polarity) = acpi_register_gsi_pic;
564 #ifdef CONFIG_ACPI_SLEEP
565 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
567 int (*acpi_suspend_lowlevel)(void);
571 * success: return IRQ number (>=0)
572 * failure: return < 0
574 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
577 unsigned int plat_gsi = gsi;
579 plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity);
580 irq = gsi_to_irq(plat_gsi);
584 EXPORT_SYMBOL_GPL(acpi_register_gsi);
586 void acpi_unregister_gsi(u32 gsi)
589 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
591 void __init acpi_set_irq_model_pic(void)
593 acpi_irq_model = ACPI_IRQ_MODEL_PIC;
594 __acpi_register_gsi = acpi_register_gsi_pic;
598 void __init acpi_set_irq_model_ioapic(void)
600 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
601 __acpi_register_gsi = acpi_register_gsi_ioapic;
606 * ACPI based hotplug support for CPU
608 #ifdef CONFIG_ACPI_HOTPLUG_CPU
609 #include <acpi/processor.h>
611 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
613 #ifdef CONFIG_ACPI_NUMA
616 nid = acpi_get_node(handle);
617 if (nid == -1 || !node_online(nid))
619 set_apicid_to_node(physid, nid);
620 numa_set_node(cpu, nid);
624 static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
628 cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED);
630 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
634 acpi_processor_set_pdc(handle);
635 acpi_map_cpu2node(handle, cpu, physid);
641 /* wrapper to silence section mismatch warning */
642 int __ref acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
644 return _acpi_map_lsapic(handle, physid, pcpu);
646 EXPORT_SYMBOL(acpi_map_lsapic);
648 int acpi_unmap_lsapic(int cpu)
650 #ifdef CONFIG_ACPI_NUMA
651 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
654 per_cpu(x86_cpu_to_apicid, cpu) = -1;
655 set_cpu_present(cpu, false);
661 EXPORT_SYMBOL(acpi_unmap_lsapic);
662 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
664 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
670 EXPORT_SYMBOL(acpi_register_ioapic);
672 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
678 EXPORT_SYMBOL(acpi_unregister_ioapic);
680 static int __init acpi_parse_sbf(struct acpi_table_header *table)
682 struct acpi_table_boot *sb;
684 sb = (struct acpi_table_boot *)table;
686 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
690 sbf_port = sb->cmos_index; /* Save CMOS port */
695 #ifdef CONFIG_HPET_TIMER
696 #include <asm/hpet.h>
698 static struct __initdata resource *hpet_res;
700 static int __init acpi_parse_hpet(struct acpi_table_header *table)
702 struct acpi_table_hpet *hpet_tbl;
704 hpet_tbl = (struct acpi_table_hpet *)table;
706 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
710 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
711 printk(KERN_WARNING PREFIX "HPET timers must be located in "
716 hpet_address = hpet_tbl->address.address;
717 hpet_blockid = hpet_tbl->sequence;
720 * Some broken BIOSes advertise HPET at 0x0. We really do not
721 * want to allocate a resource there.
724 printk(KERN_WARNING PREFIX
725 "HPET id: %#x base: %#lx is invalid\n",
726 hpet_tbl->id, hpet_address);
731 * Some even more broken BIOSes advertise HPET at
732 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
735 if (hpet_address == 0xfed0000000000000UL) {
736 if (!hpet_force_user) {
737 printk(KERN_WARNING PREFIX "HPET id: %#x "
738 "base: 0xfed0000000000000 is bogus\n "
739 "try hpet=force on the kernel command line to "
740 "fix it up to 0xfed00000.\n", hpet_tbl->id);
744 printk(KERN_WARNING PREFIX
745 "HPET id: %#x base: 0xfed0000000000000 fixed up "
746 "to 0xfed00000.\n", hpet_tbl->id);
750 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
751 hpet_tbl->id, hpet_address);
754 * Allocate and initialize the HPET firmware resource for adding into
755 * the resource tree during the lateinit timeframe.
757 #define HPET_RESOURCE_NAME_SIZE 9
758 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
760 hpet_res->name = (void *)&hpet_res[1];
761 hpet_res->flags = IORESOURCE_MEM;
762 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
765 hpet_res->start = hpet_address;
766 hpet_res->end = hpet_address + (1 * 1024) - 1;
772 * hpet_insert_resource inserts the HPET resources used into the resource
775 static __init int hpet_insert_resource(void)
780 return insert_resource(&iomem_resource, hpet_res);
783 late_initcall(hpet_insert_resource);
786 #define acpi_parse_hpet NULL
789 static int __init acpi_parse_fadt(struct acpi_table_header *table)
792 #ifdef CONFIG_X86_PM_TIMER
793 /* detect the location of the ACPI PM Timer */
794 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
796 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
797 ACPI_ADR_SPACE_SYSTEM_IO)
800 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
802 * "X" fields are optional extensions to the original V1.0
803 * fields, so we must selectively expand V1.0 fields if the
804 * corresponding X field is zero.
807 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
810 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
813 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
819 #ifdef CONFIG_X86_LOCAL_APIC
821 * Parse LAPIC entries in MADT
822 * returns 0 on success, < 0 on error
825 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
833 * Note that the LAPIC address is obtained from the MADT (32-bit value)
834 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
838 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
839 acpi_parse_lapic_addr_ovr, 0);
841 printk(KERN_ERR PREFIX
842 "Error parsing LAPIC address override entry\n");
846 register_lapic_address(acpi_lapic_addr);
851 static int __init acpi_parse_madt_lapic_entries(void)
860 * Note that the LAPIC address is obtained from the MADT (32-bit value)
861 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
865 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
866 acpi_parse_lapic_addr_ovr, 0);
868 printk(KERN_ERR PREFIX
869 "Error parsing LAPIC address override entry\n");
873 register_lapic_address(acpi_lapic_addr);
875 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
876 acpi_parse_sapic, MAX_LOCAL_APIC);
879 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
880 acpi_parse_x2apic, MAX_LOCAL_APIC);
881 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
882 acpi_parse_lapic, MAX_LOCAL_APIC);
884 if (!count && !x2count) {
885 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
886 /* TBD: Cleanup to allow fallback to MPS */
888 } else if (count < 0 || x2count < 0) {
889 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
890 /* TBD: Cleanup to allow fallback to MPS */
895 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
896 acpi_parse_x2apic_nmi, 0);
898 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
899 if (count < 0 || x2count < 0) {
900 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
901 /* TBD: Cleanup to allow fallback to MPS */
906 #endif /* CONFIG_X86_LOCAL_APIC */
908 #ifdef CONFIG_X86_IO_APIC
911 #ifdef CONFIG_X86_ES7000
912 extern int es7000_plat;
915 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
919 struct mpc_intsrc mp_irq;
922 * Convert 'gsi' to 'ioapic.pin'.
924 ioapic = mp_find_ioapic(gsi);
927 pin = mp_find_ioapic_pin(ioapic, gsi);
930 * TBD: This check is for faulty timer entries, where the override
931 * erroneously sets the trigger to level, resulting in a HUGE
932 * increase of timer interrupts!
934 if ((bus_irq == 0) && (trigger == 3))
937 mp_irq.type = MP_INTSRC;
938 mp_irq.irqtype = mp_INT;
939 mp_irq.irqflag = (trigger << 2) | polarity;
940 mp_irq.srcbus = MP_ISA_BUS;
941 mp_irq.srcbusirq = bus_irq; /* IRQ */
942 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
943 mp_irq.dstirq = pin; /* INTIN# */
945 mp_save_irq(&mp_irq);
947 isa_irq_to_gsi[bus_irq] = gsi;
950 void __init mp_config_acpi_legacy_irqs(void)
953 struct mpc_intsrc mp_irq;
957 * Fabricate the legacy ISA bus (bus #31).
959 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
961 set_bit(MP_ISA_BUS, mp_bus_not_pci);
962 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
964 #ifdef CONFIG_X86_ES7000
966 * Older generations of ES7000 have no legacy identity mappings
968 if (es7000_plat == 1)
973 * Use the default configuration for the IRQs 0-15. Unless
974 * overridden by (MADT) interrupt source override entries.
976 for (i = 0; i < 16; i++) {
978 unsigned int dstapic;
982 /* Locate the gsi that irq i maps to. */
983 if (acpi_isa_irq_to_gsi(i, &gsi))
987 * Locate the IOAPIC that manages the ISA IRQ.
989 ioapic = mp_find_ioapic(gsi);
992 pin = mp_find_ioapic_pin(ioapic, gsi);
993 dstapic = mpc_ioapic_id(ioapic);
995 for (idx = 0; idx < mp_irq_entries; idx++) {
996 struct mpc_intsrc *irq = mp_irqs + idx;
998 /* Do we already have a mapping for this ISA IRQ? */
999 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1002 /* Do we already have a mapping for this IOAPIC pin */
1003 if (irq->dstapic == dstapic && irq->dstirq == pin)
1007 if (idx != mp_irq_entries) {
1008 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1009 continue; /* IRQ already used */
1012 mp_irq.type = MP_INTSRC;
1013 mp_irq.irqflag = 0; /* Conforming */
1014 mp_irq.srcbus = MP_ISA_BUS;
1015 mp_irq.dstapic = dstapic;
1016 mp_irq.irqtype = mp_INT;
1017 mp_irq.srcbusirq = i; /* Identity mapped */
1018 mp_irq.dstirq = pin;
1020 mp_save_irq(&mp_irq);
1024 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1027 #ifdef CONFIG_X86_MPPARSE
1028 struct mpc_intsrc mp_irq;
1029 struct pci_dev *pdev;
1030 unsigned char number;
1039 if (dev->bus != &pci_bus_type)
1042 pdev = to_pci_dev(dev);
1043 number = pdev->bus->number;
1044 devfn = pdev->devfn;
1046 /* print the entry should happen on mptable identically */
1047 mp_irq.type = MP_INTSRC;
1048 mp_irq.irqtype = mp_INT;
1049 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1050 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1051 mp_irq.srcbus = number;
1052 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1053 ioapic = mp_find_ioapic(gsi);
1054 mp_irq.dstapic = mpc_ioapic_id(ioapic);
1055 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1057 mp_save_irq(&mp_irq);
1062 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1066 struct io_apic_irq_attr irq_attr;
1069 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1072 /* Don't set up the ACPI SCI because it's already set up */
1073 if (acpi_gbl_FADT.sci_interrupt == gsi)
1076 ioapic = mp_find_ioapic(gsi);
1078 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1082 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1084 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1085 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1086 "%d-%d\n", mpc_ioapic_id(ioapic),
1091 if (enable_update_mptable)
1092 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1094 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1095 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1096 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1097 ret = io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
1105 * Parse IOAPIC related entries in MADT
1106 * returns 0 on success, < 0 on error
1108 static int __init acpi_parse_madt_ioapic_entries(void)
1113 * ACPI interpreter is required to complete interrupt setup,
1114 * so if it is off, don't enumerate the io-apics with ACPI.
1115 * If MPS is present, it will handle them,
1116 * otherwise the system will stay in PIC mode
1118 if (acpi_disabled || acpi_noirq)
1125 * if "noapic" boot option, don't look for IO-APICs
1127 if (skip_ioapic_setup) {
1128 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1129 "due to 'noapic' option.\n");
1134 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1137 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1139 } else if (count < 0) {
1140 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1145 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1148 printk(KERN_ERR PREFIX
1149 "Error parsing interrupt source overrides entry\n");
1150 /* TBD: Cleanup to allow fallback to MPS */
1155 * If BIOS did not supply an INT_SRC_OVR for the SCI
1156 * pretend we got one so we can set the SCI flags.
1158 if (!acpi_sci_override_gsi)
1159 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1160 acpi_gbl_FADT.sci_interrupt);
1162 /* Fill in identity legacy mappings where no override */
1163 mp_config_acpi_legacy_irqs();
1166 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1169 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1170 /* TBD: Cleanup to allow fallback to MPS */
1177 static inline int acpi_parse_madt_ioapic_entries(void)
1181 #endif /* !CONFIG_X86_IO_APIC */
1183 static void __init early_acpi_process_madt(void)
1185 #ifdef CONFIG_X86_LOCAL_APIC
1188 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1191 * Parse MADT LAPIC entries
1193 error = early_acpi_parse_madt_lapic_addr_ovr();
1196 smp_found_config = 1;
1198 if (error == -EINVAL) {
1200 * Dell Precision Workstation 410, 610 come here.
1202 printk(KERN_ERR PREFIX
1203 "Invalid BIOS MADT, disabling ACPI\n");
1210 static void __init acpi_process_madt(void)
1212 #ifdef CONFIG_X86_LOCAL_APIC
1215 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1218 * Parse MADT LAPIC entries
1220 error = acpi_parse_madt_lapic_entries();
1225 * Parse MADT IO-APIC entries
1227 error = acpi_parse_madt_ioapic_entries();
1229 acpi_set_irq_model_ioapic();
1231 smp_found_config = 1;
1234 if (error == -EINVAL) {
1236 * Dell Precision Workstation 410, 610 come here.
1238 printk(KERN_ERR PREFIX
1239 "Invalid BIOS MADT, disabling ACPI\n");
1244 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1245 * In the event an MPS table was found, forget it.
1246 * Boot with "acpi=off" to use MPS on such a system.
1248 if (smp_found_config) {
1249 printk(KERN_WARNING PREFIX
1250 "No APIC-table, disabling MPS\n");
1251 smp_found_config = 0;
1256 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1257 * processors, where MPS only supports physical.
1259 if (acpi_lapic && acpi_ioapic)
1260 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1262 else if (acpi_lapic)
1263 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1264 "configuration information\n");
1269 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1272 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1279 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1282 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1289 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1292 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1296 "Warning: DMI blacklist says broken, but acpi forced\n");
1302 * Force ignoring BIOS IRQ0 override
1304 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1306 if (!acpi_skip_timer_override) {
1307 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1309 acpi_skip_timer_override = 1;
1315 * If your system is blacklisted here, but you find that acpi=force
1316 * works for you, please contact linux-acpi@vger.kernel.org
1318 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1320 * Boxes that need ACPI disabled
1323 .callback = dmi_disable_acpi,
1324 .ident = "IBM Thinkpad",
1326 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1327 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1332 * Boxes that need ACPI PCI IRQ routing disabled
1335 .callback = disable_acpi_irq,
1336 .ident = "ASUS A7V",
1338 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1339 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1340 /* newer BIOS, Revision 1011, does work */
1341 DMI_MATCH(DMI_BIOS_VERSION,
1342 "ASUS A7V ACPI BIOS Revision 1007"),
1347 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1348 * for LPC bridge, which is needed for the PCI
1349 * interrupt links to work. DSDT fix is in bug 5966.
1350 * 2645, 2646 model numbers are shared with 600/600E/600X
1352 .callback = disable_acpi_irq,
1353 .ident = "IBM Thinkpad 600 Series 2645",
1355 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1356 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1360 .callback = disable_acpi_irq,
1361 .ident = "IBM Thinkpad 600 Series 2646",
1363 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1364 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1368 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1371 .callback = disable_acpi_pci,
1372 .ident = "ASUS PR-DLS",
1374 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1375 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1376 DMI_MATCH(DMI_BIOS_VERSION,
1377 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1378 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1382 .callback = disable_acpi_pci,
1383 .ident = "Acer TravelMate 36x Laptop",
1385 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1386 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1392 /* second table for DMI checks that should run after early-quirks */
1393 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1395 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1396 * which includes some code which overrides all temperature
1397 * trip points to 16C if the INTIN2 input of the I/O APIC
1398 * is enabled. This input is incorrectly designated the
1399 * ISA IRQ 0 via an interrupt source override even though
1400 * it is wired to the output of the master 8259A and INTIN0
1401 * is not connected at all. Force ignoring BIOS IRQ0
1402 * override in that cases.
1405 .callback = dmi_ignore_irq0_timer_override,
1406 .ident = "HP nx6115 laptop",
1408 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1409 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1413 .callback = dmi_ignore_irq0_timer_override,
1414 .ident = "HP NX6125 laptop",
1416 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1417 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1421 .callback = dmi_ignore_irq0_timer_override,
1422 .ident = "HP NX6325 laptop",
1424 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1425 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1429 .callback = dmi_ignore_irq0_timer_override,
1430 .ident = "HP 6715b laptop",
1432 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1433 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1437 .callback = dmi_ignore_irq0_timer_override,
1438 .ident = "FUJITSU SIEMENS",
1440 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1441 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1448 * acpi_boot_table_init() and acpi_boot_init()
1449 * called from setup_arch(), always.
1450 * 1. checksums all tables
1451 * 2. enumerates lapics
1452 * 3. enumerates io-apics
1454 * acpi_table_init() is separate to allow reading SRAT without
1455 * other side effects.
1457 * side effects of acpi_boot_init:
1458 * acpi_lapic = 1 if LAPIC found
1459 * acpi_ioapic = 1 if IOAPIC found
1460 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1461 * if acpi_blacklisted() acpi_disabled = 1;
1462 * acpi_irq_model=...
1466 void __init acpi_boot_table_init(void)
1468 dmi_check_system(acpi_dmi_table);
1471 * If acpi_disabled, bail out
1477 * Initialize the ACPI boot-time table parser.
1479 if (acpi_table_init()) {
1484 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1487 * blacklist may disable ACPI entirely
1489 if (acpi_blacklisted()) {
1491 printk(KERN_WARNING PREFIX "acpi=force override\n");
1493 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1500 int __init early_acpi_boot_init(void)
1503 * If acpi_disabled, bail out
1509 * Process the Multiple APIC Description Table (MADT), if present
1511 early_acpi_process_madt();
1516 int __init acpi_boot_init(void)
1518 /* those are executed after early-quirks are executed */
1519 dmi_check_system(acpi_dmi_table_late);
1522 * If acpi_disabled, bail out
1527 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1530 * set sci_int and PM timer address
1532 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1535 * Process the Multiple APIC Description Table (MADT), if present
1537 acpi_process_madt();
1539 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1542 x86_init.pci.init = pci_acpi_init;
1547 static int __init parse_acpi(char *arg)
1552 /* "acpi=off" disables both ACPI table parsing and interpreter */
1553 if (strcmp(arg, "off") == 0) {
1556 /* acpi=force to over-ride black-list */
1557 else if (strcmp(arg, "force") == 0) {
1561 /* acpi=strict disables out-of-spec workarounds */
1562 else if (strcmp(arg, "strict") == 0) {
1565 /* acpi=rsdt use RSDT instead of XSDT */
1566 else if (strcmp(arg, "rsdt") == 0) {
1567 acpi_rsdt_forced = 1;
1569 /* "acpi=noirq" disables ACPI interrupt routing */
1570 else if (strcmp(arg, "noirq") == 0) {
1573 /* "acpi=copy_dsdt" copys DSDT */
1574 else if (strcmp(arg, "copy_dsdt") == 0) {
1575 acpi_gbl_copy_dsdt_locally = 1;
1577 /* "acpi=nocmcff" disables FF mode for corrected errors */
1578 else if (strcmp(arg, "nocmcff") == 0) {
1579 acpi_disable_cmcff = 1;
1581 /* Core will printk when we return error. */
1586 early_param("acpi", parse_acpi);
1588 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1589 static int __init parse_pci(char *arg)
1591 if (arg && strcmp(arg, "noacpi") == 0)
1595 early_param("pci", parse_pci);
1597 int __init acpi_mps_check(void)
1599 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1600 /* mptable code is not built-in*/
1601 if (acpi_disabled || acpi_noirq) {
1602 printk(KERN_WARNING "MPS support code is not built-in.\n"
1603 "Using acpi=off or acpi=noirq or pci=noacpi "
1604 "may have problem\n");
1611 #ifdef CONFIG_X86_IO_APIC
1612 static int __init parse_acpi_skip_timer_override(char *arg)
1614 acpi_skip_timer_override = 1;
1617 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1619 static int __init parse_acpi_use_timer_override(char *arg)
1621 acpi_use_timer_override = 1;
1624 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1625 #endif /* CONFIG_X86_IO_APIC */
1627 static int __init setup_acpi_sci(char *s)
1631 if (!strcmp(s, "edge"))
1632 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1633 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1634 else if (!strcmp(s, "level"))
1635 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1636 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1637 else if (!strcmp(s, "high"))
1638 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1639 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1640 else if (!strcmp(s, "low"))
1641 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1642 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1647 early_param("acpi_sci", setup_acpi_sci);
1649 int __acpi_acquire_global_lock(unsigned int *lock)
1651 unsigned int old, new, val;
1654 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1655 val = cmpxchg(lock, old, new);
1656 } while (unlikely (val != old));
1657 return (new < 3) ? -1 : 0;
1660 int __acpi_release_global_lock(unsigned int *lock)
1662 unsigned int old, new, val;
1666 val = cmpxchg(lock, old, new);
1667 } while (unlikely (val != old));
1671 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1673 e820_add_region(addr, size, E820_ACPI);