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);
192 static void acpi_register_lapic(int id, u8 enabled)
194 unsigned int ver = 0;
196 if (id >= MAX_LOCAL_APIC) {
197 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
206 if (boot_cpu_physical_apicid != -1U)
207 ver = apic_version[boot_cpu_physical_apicid];
209 generic_processor_info(id, ver);
213 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
215 struct acpi_madt_local_x2apic *processor = NULL;
219 processor = (struct acpi_madt_local_x2apic *)header;
221 if (BAD_MADT_ENTRY(processor, end))
224 acpi_table_print_madt_entry(header);
226 apic_id = processor->local_apic_id;
227 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
228 #ifdef CONFIG_X86_X2APIC
230 * We need to register disabled CPU as well to permit
231 * counting disabled CPUs. This allows us to size
232 * cpus_possible_map more accurately, to permit
233 * to not preallocating memory for all NR_CPUS
234 * when we use CPU hotplug.
236 if (!apic->apic_id_valid(apic_id) && enabled)
237 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
239 acpi_register_lapic(apic_id, enabled);
241 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
248 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
250 struct acpi_madt_local_apic *processor = NULL;
252 processor = (struct acpi_madt_local_apic *)header;
254 if (BAD_MADT_ENTRY(processor, end))
257 acpi_table_print_madt_entry(header);
260 * We need to register disabled CPU as well to permit
261 * counting disabled CPUs. This allows us to size
262 * cpus_possible_map more accurately, to permit
263 * to not preallocating memory for all NR_CPUS
264 * when we use CPU hotplug.
266 acpi_register_lapic(processor->id, /* APIC ID */
267 processor->lapic_flags & ACPI_MADT_ENABLED);
273 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
275 struct acpi_madt_local_sapic *processor = NULL;
277 processor = (struct acpi_madt_local_sapic *)header;
279 if (BAD_MADT_ENTRY(processor, end))
282 acpi_table_print_madt_entry(header);
284 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
285 processor->lapic_flags & ACPI_MADT_ENABLED);
291 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
292 const unsigned long end)
294 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
296 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
298 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
301 acpi_lapic_addr = lapic_addr_ovr->address;
307 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
308 const unsigned long end)
310 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
312 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
314 if (BAD_MADT_ENTRY(x2apic_nmi, end))
317 acpi_table_print_madt_entry(header);
319 if (x2apic_nmi->lint != 1)
320 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
326 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
328 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
330 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
332 if (BAD_MADT_ENTRY(lapic_nmi, end))
335 acpi_table_print_madt_entry(header);
337 if (lapic_nmi->lint != 1)
338 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
343 #endif /*CONFIG_X86_LOCAL_APIC */
345 #ifdef CONFIG_X86_IO_APIC
348 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
350 struct acpi_madt_io_apic *ioapic = NULL;
352 ioapic = (struct acpi_madt_io_apic *)header;
354 if (BAD_MADT_ENTRY(ioapic, end))
357 acpi_table_print_madt_entry(header);
359 mp_register_ioapic(ioapic->id,
360 ioapic->address, ioapic->global_irq_base);
366 * Parse Interrupt Source Override for the ACPI SCI
368 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
370 if (trigger == 0) /* compatible SCI trigger is level */
373 if (polarity == 0) /* compatible SCI polarity is low */
376 /* Command-line over-ride via acpi_sci= */
377 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
378 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
380 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
381 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
384 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
385 * If GSI is < 16, this will update its flags,
386 * else it will create a new mp_irqs[] entry.
388 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
391 * stash over-ride to indicate we've been here
392 * and for later update of acpi_gbl_FADT
394 acpi_sci_override_gsi = gsi;
399 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
400 const unsigned long end)
402 struct acpi_madt_interrupt_override *intsrc = NULL;
404 intsrc = (struct acpi_madt_interrupt_override *)header;
406 if (BAD_MADT_ENTRY(intsrc, end))
409 acpi_table_print_madt_entry(header);
411 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
412 acpi_sci_ioapic_setup(intsrc->source_irq,
413 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
414 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
419 if (intsrc->source_irq == 0) {
420 if (acpi_skip_timer_override) {
421 printk(PREFIX "BIOS IRQ0 override ignored.\n");
425 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
426 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
427 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
428 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
432 mp_override_legacy_irq(intsrc->source_irq,
433 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
434 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
441 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
443 struct acpi_madt_nmi_source *nmi_src = NULL;
445 nmi_src = (struct acpi_madt_nmi_source *)header;
447 if (BAD_MADT_ENTRY(nmi_src, end))
450 acpi_table_print_madt_entry(header);
452 /* TBD: Support nimsrc entries? */
457 #endif /* CONFIG_X86_IO_APIC */
460 * acpi_pic_sci_set_trigger()
462 * use ELCR to set PIC-mode trigger type for SCI
464 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
465 * it may require Edge Trigger -- use "acpi_sci=edge"
467 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
468 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
469 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
470 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
473 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
475 unsigned int mask = 1 << irq;
476 unsigned int old, new;
478 /* Real old ELCR mask */
479 old = inb(0x4d0) | (inb(0x4d1) << 8);
482 * If we use ACPI to set PCI IRQs, then we should clear ELCR
483 * since we will set it correctly as we enable the PCI irq
486 new = acpi_noirq ? old : 0;
489 * Update SCI information in the ELCR, it isn't in the PCI
493 case 1: /* Edge - clear */
496 case 3: /* Level - set */
504 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
506 outb(new >> 8, 0x4d1);
509 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
511 *irq = gsi_to_irq(gsi);
513 #ifdef CONFIG_X86_IO_APIC
514 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
515 setup_IO_APIC_irq_extra(gsi);
520 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
522 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
526 *gsi = irq_to_gsi(isa_irq);
530 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
531 int trigger, int polarity)
535 * Make sure all (legacy) PCI IRQs are set as level-triggered.
537 if (trigger == ACPI_LEVEL_SENSITIVE)
538 eisa_set_level_irq(gsi);
544 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
545 int trigger, int polarity)
547 #ifdef CONFIG_X86_IO_APIC
548 gsi = mp_register_gsi(dev, gsi, trigger, polarity);
554 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
555 int trigger, int polarity) = acpi_register_gsi_pic;
557 #ifdef CONFIG_ACPI_SLEEP
558 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
560 int (*acpi_suspend_lowlevel)(void);
564 * success: return IRQ number (>=0)
565 * failure: return < 0
567 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
570 unsigned int plat_gsi = gsi;
572 plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity);
573 irq = gsi_to_irq(plat_gsi);
577 EXPORT_SYMBOL_GPL(acpi_register_gsi);
579 void acpi_unregister_gsi(u32 gsi)
582 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
584 void __init acpi_set_irq_model_pic(void)
586 acpi_irq_model = ACPI_IRQ_MODEL_PIC;
587 __acpi_register_gsi = acpi_register_gsi_pic;
591 void __init acpi_set_irq_model_ioapic(void)
593 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
594 __acpi_register_gsi = acpi_register_gsi_ioapic;
599 * ACPI based hotplug support for CPU
601 #ifdef CONFIG_ACPI_HOTPLUG_CPU
602 #include <acpi/processor.h>
604 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
606 #ifdef CONFIG_ACPI_NUMA
609 nid = acpi_get_node(handle);
610 if (nid == -1 || !node_online(nid))
612 set_apicid_to_node(physid, nid);
613 numa_set_node(cpu, nid);
617 static int _acpi_map_lsapic(acpi_handle handle, int *pcpu)
619 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
620 union acpi_object *obj;
621 struct acpi_madt_local_apic *lapic;
622 cpumask_var_t tmp_map, new_map;
625 int retval = -ENOMEM;
627 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
630 if (!buffer.length || !buffer.pointer)
633 obj = buffer.pointer;
634 if (obj->type != ACPI_TYPE_BUFFER ||
635 obj->buffer.length < sizeof(*lapic)) {
636 kfree(buffer.pointer);
640 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
642 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
643 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
644 kfree(buffer.pointer);
650 kfree(buffer.pointer);
651 buffer.length = ACPI_ALLOCATE_BUFFER;
652 buffer.pointer = NULL;
655 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
658 if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
661 cpumask_copy(tmp_map, cpu_present_mask);
662 acpi_register_lapic(physid, ACPI_MADT_ENABLED);
665 * If acpi_register_lapic successfully generates a new logical cpu
666 * number, then the following will get us exactly what was mapped
668 cpumask_andnot(new_map, cpu_present_mask, tmp_map);
669 if (cpumask_empty(new_map)) {
670 printk ("Unable to map lapic to logical cpu number\n");
675 acpi_processor_set_pdc(handle);
677 cpu = cpumask_first(new_map);
678 acpi_map_cpu2node(handle, cpu, physid);
684 free_cpumask_var(new_map);
686 free_cpumask_var(tmp_map);
691 /* wrapper to silence section mismatch warning */
692 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
694 return _acpi_map_lsapic(handle, pcpu);
696 EXPORT_SYMBOL(acpi_map_lsapic);
698 int acpi_unmap_lsapic(int cpu)
700 #ifdef CONFIG_ACPI_NUMA
701 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
704 per_cpu(x86_cpu_to_apicid, cpu) = -1;
705 set_cpu_present(cpu, false);
711 EXPORT_SYMBOL(acpi_unmap_lsapic);
712 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
714 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
720 EXPORT_SYMBOL(acpi_register_ioapic);
722 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
728 EXPORT_SYMBOL(acpi_unregister_ioapic);
730 static int __init acpi_parse_sbf(struct acpi_table_header *table)
732 struct acpi_table_boot *sb;
734 sb = (struct acpi_table_boot *)table;
736 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
740 sbf_port = sb->cmos_index; /* Save CMOS port */
745 #ifdef CONFIG_HPET_TIMER
746 #include <asm/hpet.h>
748 static struct __initdata resource *hpet_res;
750 static int __init acpi_parse_hpet(struct acpi_table_header *table)
752 struct acpi_table_hpet *hpet_tbl;
754 hpet_tbl = (struct acpi_table_hpet *)table;
756 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
760 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
761 printk(KERN_WARNING PREFIX "HPET timers must be located in "
766 hpet_address = hpet_tbl->address.address;
767 hpet_blockid = hpet_tbl->sequence;
770 * Some broken BIOSes advertise HPET at 0x0. We really do not
771 * want to allocate a resource there.
774 printk(KERN_WARNING PREFIX
775 "HPET id: %#x base: %#lx is invalid\n",
776 hpet_tbl->id, hpet_address);
781 * Some even more broken BIOSes advertise HPET at
782 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
785 if (hpet_address == 0xfed0000000000000UL) {
786 if (!hpet_force_user) {
787 printk(KERN_WARNING PREFIX "HPET id: %#x "
788 "base: 0xfed0000000000000 is bogus\n "
789 "try hpet=force on the kernel command line to "
790 "fix it up to 0xfed00000.\n", hpet_tbl->id);
794 printk(KERN_WARNING PREFIX
795 "HPET id: %#x base: 0xfed0000000000000 fixed up "
796 "to 0xfed00000.\n", hpet_tbl->id);
800 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
801 hpet_tbl->id, hpet_address);
804 * Allocate and initialize the HPET firmware resource for adding into
805 * the resource tree during the lateinit timeframe.
807 #define HPET_RESOURCE_NAME_SIZE 9
808 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
810 hpet_res->name = (void *)&hpet_res[1];
811 hpet_res->flags = IORESOURCE_MEM;
812 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
815 hpet_res->start = hpet_address;
816 hpet_res->end = hpet_address + (1 * 1024) - 1;
822 * hpet_insert_resource inserts the HPET resources used into the resource
825 static __init int hpet_insert_resource(void)
830 return insert_resource(&iomem_resource, hpet_res);
833 late_initcall(hpet_insert_resource);
836 #define acpi_parse_hpet NULL
839 static int __init acpi_parse_fadt(struct acpi_table_header *table)
842 #ifdef CONFIG_X86_PM_TIMER
843 /* detect the location of the ACPI PM Timer */
844 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
846 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
847 ACPI_ADR_SPACE_SYSTEM_IO)
850 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
852 * "X" fields are optional extensions to the original V1.0
853 * fields, so we must selectively expand V1.0 fields if the
854 * corresponding X field is zero.
857 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
860 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
863 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
869 #ifdef CONFIG_X86_LOCAL_APIC
871 * Parse LAPIC entries in MADT
872 * returns 0 on success, < 0 on error
875 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
883 * Note that the LAPIC address is obtained from the MADT (32-bit value)
884 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
888 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
889 acpi_parse_lapic_addr_ovr, 0);
891 printk(KERN_ERR PREFIX
892 "Error parsing LAPIC address override entry\n");
896 register_lapic_address(acpi_lapic_addr);
901 static int __init acpi_parse_madt_lapic_entries(void)
910 * Note that the LAPIC address is obtained from the MADT (32-bit value)
911 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
915 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
916 acpi_parse_lapic_addr_ovr, 0);
918 printk(KERN_ERR PREFIX
919 "Error parsing LAPIC address override entry\n");
923 register_lapic_address(acpi_lapic_addr);
925 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
926 acpi_parse_sapic, MAX_LOCAL_APIC);
929 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
930 acpi_parse_x2apic, MAX_LOCAL_APIC);
931 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
932 acpi_parse_lapic, MAX_LOCAL_APIC);
934 if (!count && !x2count) {
935 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
936 /* TBD: Cleanup to allow fallback to MPS */
938 } else if (count < 0 || x2count < 0) {
939 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
940 /* TBD: Cleanup to allow fallback to MPS */
945 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
946 acpi_parse_x2apic_nmi, 0);
948 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
949 if (count < 0 || x2count < 0) {
950 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
951 /* TBD: Cleanup to allow fallback to MPS */
956 #endif /* CONFIG_X86_LOCAL_APIC */
958 #ifdef CONFIG_X86_IO_APIC
961 #ifdef CONFIG_X86_ES7000
962 extern int es7000_plat;
965 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
969 struct mpc_intsrc mp_irq;
972 * Convert 'gsi' to 'ioapic.pin'.
974 ioapic = mp_find_ioapic(gsi);
977 pin = mp_find_ioapic_pin(ioapic, gsi);
980 * TBD: This check is for faulty timer entries, where the override
981 * erroneously sets the trigger to level, resulting in a HUGE
982 * increase of timer interrupts!
984 if ((bus_irq == 0) && (trigger == 3))
987 mp_irq.type = MP_INTSRC;
988 mp_irq.irqtype = mp_INT;
989 mp_irq.irqflag = (trigger << 2) | polarity;
990 mp_irq.srcbus = MP_ISA_BUS;
991 mp_irq.srcbusirq = bus_irq; /* IRQ */
992 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
993 mp_irq.dstirq = pin; /* INTIN# */
995 mp_save_irq(&mp_irq);
997 isa_irq_to_gsi[bus_irq] = gsi;
1000 void __init mp_config_acpi_legacy_irqs(void)
1003 struct mpc_intsrc mp_irq;
1007 * Fabricate the legacy ISA bus (bus #31).
1009 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1011 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1012 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1014 #ifdef CONFIG_X86_ES7000
1016 * Older generations of ES7000 have no legacy identity mappings
1018 if (es7000_plat == 1)
1023 * Use the default configuration for the IRQs 0-15. Unless
1024 * overridden by (MADT) interrupt source override entries.
1026 for (i = 0; i < 16; i++) {
1028 unsigned int dstapic;
1032 /* Locate the gsi that irq i maps to. */
1033 if (acpi_isa_irq_to_gsi(i, &gsi))
1037 * Locate the IOAPIC that manages the ISA IRQ.
1039 ioapic = mp_find_ioapic(gsi);
1042 pin = mp_find_ioapic_pin(ioapic, gsi);
1043 dstapic = mpc_ioapic_id(ioapic);
1045 for (idx = 0; idx < mp_irq_entries; idx++) {
1046 struct mpc_intsrc *irq = mp_irqs + idx;
1048 /* Do we already have a mapping for this ISA IRQ? */
1049 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1052 /* Do we already have a mapping for this IOAPIC pin */
1053 if (irq->dstapic == dstapic && irq->dstirq == pin)
1057 if (idx != mp_irq_entries) {
1058 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1059 continue; /* IRQ already used */
1062 mp_irq.type = MP_INTSRC;
1063 mp_irq.irqflag = 0; /* Conforming */
1064 mp_irq.srcbus = MP_ISA_BUS;
1065 mp_irq.dstapic = dstapic;
1066 mp_irq.irqtype = mp_INT;
1067 mp_irq.srcbusirq = i; /* Identity mapped */
1068 mp_irq.dstirq = pin;
1070 mp_save_irq(&mp_irq);
1074 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1077 #ifdef CONFIG_X86_MPPARSE
1078 struct mpc_intsrc mp_irq;
1079 struct pci_dev *pdev;
1080 unsigned char number;
1089 if (dev->bus != &pci_bus_type)
1092 pdev = to_pci_dev(dev);
1093 number = pdev->bus->number;
1094 devfn = pdev->devfn;
1096 /* print the entry should happen on mptable identically */
1097 mp_irq.type = MP_INTSRC;
1098 mp_irq.irqtype = mp_INT;
1099 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1100 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1101 mp_irq.srcbus = number;
1102 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1103 ioapic = mp_find_ioapic(gsi);
1104 mp_irq.dstapic = mpc_ioapic_id(ioapic);
1105 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1107 mp_save_irq(&mp_irq);
1112 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1116 struct io_apic_irq_attr irq_attr;
1119 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1122 /* Don't set up the ACPI SCI because it's already set up */
1123 if (acpi_gbl_FADT.sci_interrupt == gsi)
1126 ioapic = mp_find_ioapic(gsi);
1128 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1132 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1134 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1135 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1136 "%d-%d\n", mpc_ioapic_id(ioapic),
1141 if (enable_update_mptable)
1142 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1144 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1145 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1146 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1147 ret = io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
1155 * Parse IOAPIC related entries in MADT
1156 * returns 0 on success, < 0 on error
1158 static int __init acpi_parse_madt_ioapic_entries(void)
1163 * ACPI interpreter is required to complete interrupt setup,
1164 * so if it is off, don't enumerate the io-apics with ACPI.
1165 * If MPS is present, it will handle them,
1166 * otherwise the system will stay in PIC mode
1168 if (acpi_disabled || acpi_noirq)
1175 * if "noapic" boot option, don't look for IO-APICs
1177 if (skip_ioapic_setup) {
1178 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1179 "due to 'noapic' option.\n");
1184 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1187 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1189 } else if (count < 0) {
1190 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1195 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1198 printk(KERN_ERR PREFIX
1199 "Error parsing interrupt source overrides entry\n");
1200 /* TBD: Cleanup to allow fallback to MPS */
1205 * If BIOS did not supply an INT_SRC_OVR for the SCI
1206 * pretend we got one so we can set the SCI flags.
1208 if (!acpi_sci_override_gsi)
1209 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1210 acpi_gbl_FADT.sci_interrupt);
1212 /* Fill in identity legacy mappings where no override */
1213 mp_config_acpi_legacy_irqs();
1216 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1219 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1220 /* TBD: Cleanup to allow fallback to MPS */
1227 static inline int acpi_parse_madt_ioapic_entries(void)
1231 #endif /* !CONFIG_X86_IO_APIC */
1233 static void __init early_acpi_process_madt(void)
1235 #ifdef CONFIG_X86_LOCAL_APIC
1238 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1241 * Parse MADT LAPIC entries
1243 error = early_acpi_parse_madt_lapic_addr_ovr();
1246 smp_found_config = 1;
1248 if (error == -EINVAL) {
1250 * Dell Precision Workstation 410, 610 come here.
1252 printk(KERN_ERR PREFIX
1253 "Invalid BIOS MADT, disabling ACPI\n");
1260 static void __init acpi_process_madt(void)
1262 #ifdef CONFIG_X86_LOCAL_APIC
1265 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1268 * Parse MADT LAPIC entries
1270 error = acpi_parse_madt_lapic_entries();
1275 * Parse MADT IO-APIC entries
1277 error = acpi_parse_madt_ioapic_entries();
1279 acpi_set_irq_model_ioapic();
1281 smp_found_config = 1;
1284 if (error == -EINVAL) {
1286 * Dell Precision Workstation 410, 610 come here.
1288 printk(KERN_ERR PREFIX
1289 "Invalid BIOS MADT, disabling ACPI\n");
1294 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1295 * In the event an MPS table was found, forget it.
1296 * Boot with "acpi=off" to use MPS on such a system.
1298 if (smp_found_config) {
1299 printk(KERN_WARNING PREFIX
1300 "No APIC-table, disabling MPS\n");
1301 smp_found_config = 0;
1306 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1307 * processors, where MPS only supports physical.
1309 if (acpi_lapic && acpi_ioapic)
1310 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1312 else if (acpi_lapic)
1313 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1314 "configuration information\n");
1319 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1322 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1329 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1332 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1339 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1342 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1346 "Warning: DMI blacklist says broken, but acpi forced\n");
1352 * Force ignoring BIOS IRQ0 override
1354 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1356 if (!acpi_skip_timer_override) {
1357 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1359 acpi_skip_timer_override = 1;
1365 * If your system is blacklisted here, but you find that acpi=force
1366 * works for you, please contact linux-acpi@vger.kernel.org
1368 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1370 * Boxes that need ACPI disabled
1373 .callback = dmi_disable_acpi,
1374 .ident = "IBM Thinkpad",
1376 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1377 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1382 * Boxes that need ACPI PCI IRQ routing disabled
1385 .callback = disable_acpi_irq,
1386 .ident = "ASUS A7V",
1388 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1389 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1390 /* newer BIOS, Revision 1011, does work */
1391 DMI_MATCH(DMI_BIOS_VERSION,
1392 "ASUS A7V ACPI BIOS Revision 1007"),
1397 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1398 * for LPC bridge, which is needed for the PCI
1399 * interrupt links to work. DSDT fix is in bug 5966.
1400 * 2645, 2646 model numbers are shared with 600/600E/600X
1402 .callback = disable_acpi_irq,
1403 .ident = "IBM Thinkpad 600 Series 2645",
1405 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1406 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1410 .callback = disable_acpi_irq,
1411 .ident = "IBM Thinkpad 600 Series 2646",
1413 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1414 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1418 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1421 .callback = disable_acpi_pci,
1422 .ident = "ASUS PR-DLS",
1424 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1425 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1426 DMI_MATCH(DMI_BIOS_VERSION,
1427 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1428 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1432 .callback = disable_acpi_pci,
1433 .ident = "Acer TravelMate 36x Laptop",
1435 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1436 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1442 /* second table for DMI checks that should run after early-quirks */
1443 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1445 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1446 * which includes some code which overrides all temperature
1447 * trip points to 16C if the INTIN2 input of the I/O APIC
1448 * is enabled. This input is incorrectly designated the
1449 * ISA IRQ 0 via an interrupt source override even though
1450 * it is wired to the output of the master 8259A and INTIN0
1451 * is not connected at all. Force ignoring BIOS IRQ0
1452 * override in that cases.
1455 .callback = dmi_ignore_irq0_timer_override,
1456 .ident = "HP nx6115 laptop",
1458 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1459 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1463 .callback = dmi_ignore_irq0_timer_override,
1464 .ident = "HP NX6125 laptop",
1466 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1467 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1471 .callback = dmi_ignore_irq0_timer_override,
1472 .ident = "HP NX6325 laptop",
1474 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1475 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1479 .callback = dmi_ignore_irq0_timer_override,
1480 .ident = "HP 6715b laptop",
1482 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1483 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1487 .callback = dmi_ignore_irq0_timer_override,
1488 .ident = "FUJITSU SIEMENS",
1490 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1491 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1498 * acpi_boot_table_init() and acpi_boot_init()
1499 * called from setup_arch(), always.
1500 * 1. checksums all tables
1501 * 2. enumerates lapics
1502 * 3. enumerates io-apics
1504 * acpi_table_init() is separate to allow reading SRAT without
1505 * other side effects.
1507 * side effects of acpi_boot_init:
1508 * acpi_lapic = 1 if LAPIC found
1509 * acpi_ioapic = 1 if IOAPIC found
1510 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1511 * if acpi_blacklisted() acpi_disabled = 1;
1512 * acpi_irq_model=...
1516 void __init acpi_boot_table_init(void)
1518 dmi_check_system(acpi_dmi_table);
1521 * If acpi_disabled, bail out
1527 * Initialize the ACPI boot-time table parser.
1529 if (acpi_table_init()) {
1534 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1537 * blacklist may disable ACPI entirely
1539 if (acpi_blacklisted()) {
1541 printk(KERN_WARNING PREFIX "acpi=force override\n");
1543 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1550 int __init early_acpi_boot_init(void)
1553 * If acpi_disabled, bail out
1559 * Process the Multiple APIC Description Table (MADT), if present
1561 early_acpi_process_madt();
1566 int __init acpi_boot_init(void)
1568 /* those are executed after early-quirks are executed */
1569 dmi_check_system(acpi_dmi_table_late);
1572 * If acpi_disabled, bail out
1577 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1580 * set sci_int and PM timer address
1582 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1585 * Process the Multiple APIC Description Table (MADT), if present
1587 acpi_process_madt();
1589 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1592 x86_init.pci.init = pci_acpi_init;
1597 static int __init parse_acpi(char *arg)
1602 /* "acpi=off" disables both ACPI table parsing and interpreter */
1603 if (strcmp(arg, "off") == 0) {
1606 /* acpi=force to over-ride black-list */
1607 else if (strcmp(arg, "force") == 0) {
1611 /* acpi=strict disables out-of-spec workarounds */
1612 else if (strcmp(arg, "strict") == 0) {
1615 /* acpi=rsdt use RSDT instead of XSDT */
1616 else if (strcmp(arg, "rsdt") == 0) {
1617 acpi_rsdt_forced = 1;
1619 /* "acpi=noirq" disables ACPI interrupt routing */
1620 else if (strcmp(arg, "noirq") == 0) {
1623 /* "acpi=copy_dsdt" copys DSDT */
1624 else if (strcmp(arg, "copy_dsdt") == 0) {
1625 acpi_gbl_copy_dsdt_locally = 1;
1627 /* "acpi=nocmcff" disables FF mode for corrected errors */
1628 else if (strcmp(arg, "nocmcff") == 0) {
1629 acpi_disable_cmcff = 1;
1631 /* Core will printk when we return error. */
1636 early_param("acpi", parse_acpi);
1638 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1639 static int __init parse_pci(char *arg)
1641 if (arg && strcmp(arg, "noacpi") == 0)
1645 early_param("pci", parse_pci);
1647 int __init acpi_mps_check(void)
1649 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1650 /* mptable code is not built-in*/
1651 if (acpi_disabled || acpi_noirq) {
1652 printk(KERN_WARNING "MPS support code is not built-in.\n"
1653 "Using acpi=off or acpi=noirq or pci=noacpi "
1654 "may have problem\n");
1661 #ifdef CONFIG_X86_IO_APIC
1662 static int __init parse_acpi_skip_timer_override(char *arg)
1664 acpi_skip_timer_override = 1;
1667 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1669 static int __init parse_acpi_use_timer_override(char *arg)
1671 acpi_use_timer_override = 1;
1674 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1675 #endif /* CONFIG_X86_IO_APIC */
1677 static int __init setup_acpi_sci(char *s)
1681 if (!strcmp(s, "edge"))
1682 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1683 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1684 else if (!strcmp(s, "level"))
1685 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1686 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1687 else if (!strcmp(s, "high"))
1688 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1689 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1690 else if (!strcmp(s, "low"))
1691 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1692 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1697 early_param("acpi_sci", setup_acpi_sci);
1699 int __acpi_acquire_global_lock(unsigned int *lock)
1701 unsigned int old, new, val;
1704 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1705 val = cmpxchg(lock, old, new);
1706 } while (unlikely (val != old));
1707 return (new < 3) ? -1 : 0;
1710 int __acpi_release_global_lock(unsigned int *lock)
1712 unsigned int old, new, val;
1716 val = cmpxchg(lock, old, new);
1717 } while (unlikely (val != old));
1721 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1723 e820_add_region(addr, size, E820_ACPI);