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 static int __initdata acpi_force = 0;
50 EXPORT_SYMBOL(acpi_disabled);
53 # include <asm/proto.h>
54 # include <asm/numa_64.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);
66 int acpi_ht __initdata = 1; /* enable HT */
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;
77 #ifdef CONFIG_X86_LOCAL_APIC
78 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
81 #ifndef __HAVE_ARCH_CMPXCHG
82 #warning ACPI uses CMPXCHG, i486 and later hardware
85 /* --------------------------------------------------------------------------
86 Boot-time Configuration
87 -------------------------------------------------------------------------- */
90 * The default interrupt routing model is PIC (8259). This gets
91 * overridden if IOAPICs are enumerated (below).
93 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
97 * ISA irqs by default are the first 16 gsis but can be
98 * any gsi as specified by an interrupt source override.
100 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
101 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
104 static unsigned int gsi_to_irq(unsigned int gsi)
106 unsigned int irq = gsi + NR_IRQS_LEGACY;
109 for (i = 0; i < NR_IRQS_LEGACY; i++) {
110 if (isa_irq_to_gsi[i] == gsi) {
115 /* Provide an identity mapping of gsi == irq
116 * except on truly weird platforms that have
117 * non isa irqs in the first 16 gsis.
119 if (gsi >= NR_IRQS_LEGACY)
122 irq = gsi_end + 1 + gsi;
127 static u32 irq_to_gsi(int irq)
131 if (irq < NR_IRQS_LEGACY)
132 gsi = isa_irq_to_gsi[irq];
133 else if (irq <= gsi_end)
135 else if (irq <= (gsi_end + NR_IRQS_LEGACY))
144 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
145 * to map the target physical address. The problem is that set_fixmap()
146 * provides a single page, and it is possible that the page is not
148 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
149 * i.e. until the next __va_range() call.
151 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
152 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
153 * count idx down while incrementing the phys address.
155 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
161 return early_ioremap(phys, size);
163 void __init __acpi_unmap_table(char *map, unsigned long size)
168 early_iounmap(map, size);
171 #ifdef CONFIG_X86_LOCAL_APIC
172 static int __init acpi_parse_madt(struct acpi_table_header *table)
174 struct acpi_table_madt *madt = NULL;
179 madt = (struct acpi_table_madt *)table;
181 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
186 acpi_lapic_addr = (u64) madt->address;
188 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
192 default_acpi_madt_oem_check(madt->header.oem_id,
193 madt->header.oem_table_id);
198 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
200 unsigned int ver = 0;
207 if (boot_cpu_physical_apicid != -1U)
208 ver = apic_version[boot_cpu_physical_apicid];
210 generic_processor_info(id, ver);
214 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
216 struct acpi_madt_local_x2apic *processor = NULL;
218 processor = (struct acpi_madt_local_x2apic *)header;
220 if (BAD_MADT_ENTRY(processor, end))
223 acpi_table_print_madt_entry(header);
225 #ifdef CONFIG_X86_X2APIC
227 * We need to register disabled CPU as well to permit
228 * counting disabled CPUs. This allows us to size
229 * cpus_possible_map more accurately, to permit
230 * to not preallocating memory for all NR_CPUS
231 * when we use CPU hotplug.
233 acpi_register_lapic(processor->local_apic_id, /* APIC ID */
234 processor->lapic_flags & ACPI_MADT_ENABLED);
236 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
243 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
245 struct acpi_madt_local_apic *processor = NULL;
247 processor = (struct acpi_madt_local_apic *)header;
249 if (BAD_MADT_ENTRY(processor, end))
252 acpi_table_print_madt_entry(header);
255 * We need to register disabled CPU as well to permit
256 * counting disabled CPUs. This allows us to size
257 * cpus_possible_map more accurately, to permit
258 * to not preallocating memory for all NR_CPUS
259 * when we use CPU hotplug.
261 acpi_register_lapic(processor->id, /* APIC ID */
262 processor->lapic_flags & ACPI_MADT_ENABLED);
268 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
270 struct acpi_madt_local_sapic *processor = NULL;
272 processor = (struct acpi_madt_local_sapic *)header;
274 if (BAD_MADT_ENTRY(processor, end))
277 acpi_table_print_madt_entry(header);
279 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
280 processor->lapic_flags & ACPI_MADT_ENABLED);
286 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
287 const unsigned long end)
289 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
291 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
293 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
296 acpi_lapic_addr = lapic_addr_ovr->address;
302 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
303 const unsigned long end)
305 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
307 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
309 if (BAD_MADT_ENTRY(x2apic_nmi, end))
312 acpi_table_print_madt_entry(header);
314 if (x2apic_nmi->lint != 1)
315 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
321 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
323 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
325 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
327 if (BAD_MADT_ENTRY(lapic_nmi, end))
330 acpi_table_print_madt_entry(header);
332 if (lapic_nmi->lint != 1)
333 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
338 #endif /*CONFIG_X86_LOCAL_APIC */
340 #ifdef CONFIG_X86_IO_APIC
343 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
345 struct acpi_madt_io_apic *ioapic = NULL;
347 ioapic = (struct acpi_madt_io_apic *)header;
349 if (BAD_MADT_ENTRY(ioapic, end))
352 acpi_table_print_madt_entry(header);
354 mp_register_ioapic(ioapic->id,
355 ioapic->address, ioapic->global_irq_base);
361 * Parse Interrupt Source Override for the ACPI SCI
363 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
365 if (trigger == 0) /* compatible SCI trigger is level */
368 if (polarity == 0) /* compatible SCI polarity is low */
371 /* Command-line over-ride via acpi_sci= */
372 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
373 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
375 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
376 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
379 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
380 * If GSI is < 16, this will update its flags,
381 * else it will create a new mp_irqs[] entry.
383 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
386 * stash over-ride to indicate we've been here
387 * and for later update of acpi_gbl_FADT
389 acpi_sci_override_gsi = gsi;
394 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
395 const unsigned long end)
397 struct acpi_madt_interrupt_override *intsrc = NULL;
399 intsrc = (struct acpi_madt_interrupt_override *)header;
401 if (BAD_MADT_ENTRY(intsrc, end))
404 acpi_table_print_madt_entry(header);
406 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
407 acpi_sci_ioapic_setup(intsrc->source_irq,
408 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
409 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
414 if (acpi_skip_timer_override &&
415 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
416 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
420 mp_override_legacy_irq(intsrc->source_irq,
421 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
422 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
429 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
431 struct acpi_madt_nmi_source *nmi_src = NULL;
433 nmi_src = (struct acpi_madt_nmi_source *)header;
435 if (BAD_MADT_ENTRY(nmi_src, end))
438 acpi_table_print_madt_entry(header);
440 /* TBD: Support nimsrc entries? */
445 #endif /* CONFIG_X86_IO_APIC */
448 * acpi_pic_sci_set_trigger()
450 * use ELCR to set PIC-mode trigger type for SCI
452 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
453 * it may require Edge Trigger -- use "acpi_sci=edge"
455 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
456 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
457 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
458 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
461 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
463 unsigned int mask = 1 << irq;
464 unsigned int old, new;
466 /* Real old ELCR mask */
467 old = inb(0x4d0) | (inb(0x4d1) << 8);
470 * If we use ACPI to set PCI IRQs, then we should clear ELCR
471 * since we will set it correctly as we enable the PCI irq
474 new = acpi_noirq ? old : 0;
477 * Update SCI information in the ELCR, it isn't in the PCI
481 case 1: /* Edge - clear */
484 case 3: /* Level - set */
492 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
494 outb(new >> 8, 0x4d1);
497 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
499 *irq = gsi_to_irq(gsi);
501 #ifdef CONFIG_X86_IO_APIC
502 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
503 setup_IO_APIC_irq_extra(gsi);
509 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
513 *gsi = irq_to_gsi(isa_irq);
518 * success: return IRQ number (>=0)
519 * failure: return < 0
521 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
524 unsigned int plat_gsi = gsi;
528 * Make sure all (legacy) PCI IRQs are set as level-triggered.
530 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
531 if (trigger == ACPI_LEVEL_SENSITIVE)
532 eisa_set_level_irq(gsi);
536 #ifdef CONFIG_X86_IO_APIC
537 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
538 plat_gsi = mp_register_gsi(dev, gsi, trigger, polarity);
541 irq = gsi_to_irq(plat_gsi);
547 * ACPI based hotplug support for CPU
549 #ifdef CONFIG_ACPI_HOTPLUG_CPU
550 #include <acpi/processor.h>
552 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
554 #ifdef CONFIG_ACPI_NUMA
557 nid = acpi_get_node(handle);
558 if (nid == -1 || !node_online(nid))
561 apicid_to_node[physid] = nid;
562 numa_set_node(cpu, nid);
563 #else /* CONFIG_X86_32 */
564 apicid_2_node[physid] = nid;
565 cpu_to_node_map[cpu] = nid;
571 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
573 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
574 union acpi_object *obj;
575 struct acpi_madt_local_apic *lapic;
576 cpumask_var_t tmp_map, new_map;
579 int retval = -ENOMEM;
581 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
584 if (!buffer.length || !buffer.pointer)
587 obj = buffer.pointer;
588 if (obj->type != ACPI_TYPE_BUFFER ||
589 obj->buffer.length < sizeof(*lapic)) {
590 kfree(buffer.pointer);
594 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
596 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
597 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
598 kfree(buffer.pointer);
604 kfree(buffer.pointer);
605 buffer.length = ACPI_ALLOCATE_BUFFER;
606 buffer.pointer = NULL;
608 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
611 if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
614 cpumask_copy(tmp_map, cpu_present_mask);
615 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
618 * If mp_register_lapic successfully generates a new logical cpu
619 * number, then the following will get us exactly what was mapped
621 cpumask_andnot(new_map, cpu_present_mask, tmp_map);
622 if (cpumask_empty(new_map)) {
623 printk ("Unable to map lapic to logical cpu number\n");
628 acpi_processor_set_pdc(handle);
630 cpu = cpumask_first(new_map);
631 acpi_map_cpu2node(handle, cpu, physid);
637 free_cpumask_var(new_map);
639 free_cpumask_var(tmp_map);
644 /* wrapper to silence section mismatch warning */
645 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
647 return _acpi_map_lsapic(handle, pcpu);
649 EXPORT_SYMBOL(acpi_map_lsapic);
651 int acpi_unmap_lsapic(int cpu)
653 per_cpu(x86_cpu_to_apicid, cpu) = -1;
654 set_cpu_present(cpu, false);
660 EXPORT_SYMBOL(acpi_unmap_lsapic);
661 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
663 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
669 EXPORT_SYMBOL(acpi_register_ioapic);
671 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
677 EXPORT_SYMBOL(acpi_unregister_ioapic);
679 static int __init acpi_parse_sbf(struct acpi_table_header *table)
681 struct acpi_table_boot *sb;
683 sb = (struct acpi_table_boot *)table;
685 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
689 sbf_port = sb->cmos_index; /* Save CMOS port */
694 #ifdef CONFIG_HPET_TIMER
695 #include <asm/hpet.h>
697 static struct __initdata resource *hpet_res;
699 static int __init acpi_parse_hpet(struct acpi_table_header *table)
701 struct acpi_table_hpet *hpet_tbl;
703 hpet_tbl = (struct acpi_table_hpet *)table;
705 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
709 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
710 printk(KERN_WARNING PREFIX "HPET timers must be located in "
715 hpet_address = hpet_tbl->address.address;
716 hpet_blockid = hpet_tbl->sequence;
719 * Some broken BIOSes advertise HPET at 0x0. We really do not
720 * want to allocate a resource there.
723 printk(KERN_WARNING PREFIX
724 "HPET id: %#x base: %#lx is invalid\n",
725 hpet_tbl->id, hpet_address);
730 * Some even more broken BIOSes advertise HPET at
731 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
734 if (hpet_address == 0xfed0000000000000UL) {
735 if (!hpet_force_user) {
736 printk(KERN_WARNING PREFIX "HPET id: %#x "
737 "base: 0xfed0000000000000 is bogus\n "
738 "try hpet=force on the kernel command line to "
739 "fix it up to 0xfed00000.\n", hpet_tbl->id);
743 printk(KERN_WARNING PREFIX
744 "HPET id: %#x base: 0xfed0000000000000 fixed up "
745 "to 0xfed00000.\n", hpet_tbl->id);
749 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
750 hpet_tbl->id, hpet_address);
753 * Allocate and initialize the HPET firmware resource for adding into
754 * the resource tree during the lateinit timeframe.
756 #define HPET_RESOURCE_NAME_SIZE 9
757 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
759 hpet_res->name = (void *)&hpet_res[1];
760 hpet_res->flags = IORESOURCE_MEM;
761 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
764 hpet_res->start = hpet_address;
765 hpet_res->end = hpet_address + (1 * 1024) - 1;
771 * hpet_insert_resource inserts the HPET resources used into the resource
774 static __init int hpet_insert_resource(void)
779 return insert_resource(&iomem_resource, hpet_res);
782 late_initcall(hpet_insert_resource);
785 #define acpi_parse_hpet NULL
788 static int __init acpi_parse_fadt(struct acpi_table_header *table)
791 #ifdef CONFIG_X86_PM_TIMER
792 /* detect the location of the ACPI PM Timer */
793 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
795 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
796 ACPI_ADR_SPACE_SYSTEM_IO)
799 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
801 * "X" fields are optional extensions to the original V1.0
802 * fields, so we must selectively expand V1.0 fields if the
803 * corresponding X field is zero.
806 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
809 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
812 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
818 #ifdef CONFIG_X86_LOCAL_APIC
820 * Parse LAPIC entries in MADT
821 * returns 0 on success, < 0 on error
824 static void __init acpi_register_lapic_address(unsigned long address)
826 mp_lapic_addr = address;
828 set_fixmap_nocache(FIX_APIC_BASE, address);
829 if (boot_cpu_physical_apicid == -1U) {
830 boot_cpu_physical_apicid = read_apic_id();
831 apic_version[boot_cpu_physical_apicid] =
832 GET_APIC_VERSION(apic_read(APIC_LVR));
836 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
844 * Note that the LAPIC address is obtained from the MADT (32-bit value)
845 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
849 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
850 acpi_parse_lapic_addr_ovr, 0);
852 printk(KERN_ERR PREFIX
853 "Error parsing LAPIC address override entry\n");
857 acpi_register_lapic_address(acpi_lapic_addr);
862 static int __init acpi_parse_madt_lapic_entries(void)
871 * Note that the LAPIC address is obtained from the MADT (32-bit value)
872 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
876 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
877 acpi_parse_lapic_addr_ovr, 0);
879 printk(KERN_ERR PREFIX
880 "Error parsing LAPIC address override entry\n");
884 acpi_register_lapic_address(acpi_lapic_addr);
886 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
887 acpi_parse_sapic, MAX_APICS);
890 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
891 acpi_parse_x2apic, MAX_APICS);
892 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
893 acpi_parse_lapic, MAX_APICS);
895 if (!count && !x2count) {
896 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
897 /* TBD: Cleanup to allow fallback to MPS */
899 } else if (count < 0 || x2count < 0) {
900 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
901 /* TBD: Cleanup to allow fallback to MPS */
906 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
907 acpi_parse_x2apic_nmi, 0);
909 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
910 if (count < 0 || x2count < 0) {
911 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
912 /* TBD: Cleanup to allow fallback to MPS */
917 #endif /* CONFIG_X86_LOCAL_APIC */
919 #ifdef CONFIG_X86_IO_APIC
922 #ifdef CONFIG_X86_ES7000
923 extern int es7000_plat;
926 static void assign_to_mp_irq(struct mpc_intsrc *m,
927 struct mpc_intsrc *mp_irq)
929 memcpy(mp_irq, m, sizeof(struct mpc_intsrc));
932 static int mp_irq_cmp(struct mpc_intsrc *mp_irq,
933 struct mpc_intsrc *m)
935 return memcmp(mp_irq, m, sizeof(struct mpc_intsrc));
938 static void save_mp_irq(struct mpc_intsrc *m)
942 for (i = 0; i < mp_irq_entries; i++) {
943 if (!mp_irq_cmp(&mp_irqs[i], m))
947 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
948 if (++mp_irq_entries == MAX_IRQ_SOURCES)
949 panic("Max # of irq sources exceeded!!\n");
952 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
956 struct mpc_intsrc mp_irq;
959 * Convert 'gsi' to 'ioapic.pin'.
961 ioapic = mp_find_ioapic(gsi);
964 pin = mp_find_ioapic_pin(ioapic, gsi);
967 * TBD: This check is for faulty timer entries, where the override
968 * erroneously sets the trigger to level, resulting in a HUGE
969 * increase of timer interrupts!
971 if ((bus_irq == 0) && (trigger == 3))
974 mp_irq.type = MP_INTSRC;
975 mp_irq.irqtype = mp_INT;
976 mp_irq.irqflag = (trigger << 2) | polarity;
977 mp_irq.srcbus = MP_ISA_BUS;
978 mp_irq.srcbusirq = bus_irq; /* IRQ */
979 mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */
980 mp_irq.dstirq = pin; /* INTIN# */
982 save_mp_irq(&mp_irq);
984 isa_irq_to_gsi[bus_irq] = gsi;
987 void __init mp_config_acpi_legacy_irqs(void)
990 struct mpc_intsrc mp_irq;
992 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
994 * Fabricate the legacy ISA bus (bus #31).
996 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
998 set_bit(MP_ISA_BUS, mp_bus_not_pci);
999 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1001 #ifdef CONFIG_X86_ES7000
1003 * Older generations of ES7000 have no legacy identity mappings
1005 if (es7000_plat == 1)
1010 * Use the default configuration for the IRQs 0-15. Unless
1011 * overridden by (MADT) interrupt source override entries.
1013 for (i = 0; i < 16; i++) {
1015 unsigned int dstapic;
1019 /* Locate the gsi that irq i maps to. */
1020 if (acpi_isa_irq_to_gsi(i, &gsi))
1024 * Locate the IOAPIC that manages the ISA IRQ.
1026 ioapic = mp_find_ioapic(gsi);
1029 pin = mp_find_ioapic_pin(ioapic, gsi);
1030 dstapic = mp_ioapics[ioapic].apicid;
1032 for (idx = 0; idx < mp_irq_entries; idx++) {
1033 struct mpc_intsrc *irq = mp_irqs + idx;
1035 /* Do we already have a mapping for this ISA IRQ? */
1036 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1039 /* Do we already have a mapping for this IOAPIC pin */
1040 if (irq->dstapic == dstapic && irq->dstirq == pin)
1044 if (idx != mp_irq_entries) {
1045 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1046 continue; /* IRQ already used */
1049 mp_irq.type = MP_INTSRC;
1050 mp_irq.irqflag = 0; /* Conforming */
1051 mp_irq.srcbus = MP_ISA_BUS;
1052 mp_irq.dstapic = dstapic;
1053 mp_irq.irqtype = mp_INT;
1054 mp_irq.srcbusirq = i; /* Identity mapped */
1055 mp_irq.dstirq = pin;
1057 save_mp_irq(&mp_irq);
1061 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1064 #ifdef CONFIG_X86_MPPARSE
1065 struct mpc_intsrc mp_irq;
1066 struct pci_dev *pdev;
1067 unsigned char number;
1076 if (dev->bus != &pci_bus_type)
1079 pdev = to_pci_dev(dev);
1080 number = pdev->bus->number;
1081 devfn = pdev->devfn;
1083 /* print the entry should happen on mptable identically */
1084 mp_irq.type = MP_INTSRC;
1085 mp_irq.irqtype = mp_INT;
1086 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1087 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1088 mp_irq.srcbus = number;
1089 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1090 ioapic = mp_find_ioapic(gsi);
1091 mp_irq.dstapic = mp_ioapics[ioapic].apicid;
1092 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1094 save_mp_irq(&mp_irq);
1099 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1103 struct io_apic_irq_attr irq_attr;
1105 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1108 /* Don't set up the ACPI SCI because it's already set up */
1109 if (acpi_gbl_FADT.sci_interrupt == gsi)
1112 ioapic = mp_find_ioapic(gsi);
1114 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1118 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1120 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1121 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1122 "%d-%d\n", mp_ioapics[ioapic].apicid,
1127 if (enable_update_mptable)
1128 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1130 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1131 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1132 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1133 io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
1139 * Parse IOAPIC related entries in MADT
1140 * returns 0 on success, < 0 on error
1142 static int __init acpi_parse_madt_ioapic_entries(void)
1147 * ACPI interpreter is required to complete interrupt setup,
1148 * so if it is off, don't enumerate the io-apics with ACPI.
1149 * If MPS is present, it will handle them,
1150 * otherwise the system will stay in PIC mode
1152 if (acpi_disabled || acpi_noirq)
1159 * if "noapic" boot option, don't look for IO-APICs
1161 if (skip_ioapic_setup) {
1162 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1163 "due to 'noapic' option.\n");
1168 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1171 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1173 } else if (count < 0) {
1174 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1179 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1182 printk(KERN_ERR PREFIX
1183 "Error parsing interrupt source overrides entry\n");
1184 /* TBD: Cleanup to allow fallback to MPS */
1189 * If BIOS did not supply an INT_SRC_OVR for the SCI
1190 * pretend we got one so we can set the SCI flags.
1192 if (!acpi_sci_override_gsi)
1193 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1194 acpi_gbl_FADT.sci_interrupt);
1196 /* Fill in identity legacy mappings where no override */
1197 mp_config_acpi_legacy_irqs();
1200 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1203 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1204 /* TBD: Cleanup to allow fallback to MPS */
1211 static inline int acpi_parse_madt_ioapic_entries(void)
1215 #endif /* !CONFIG_X86_IO_APIC */
1217 static void __init early_acpi_process_madt(void)
1219 #ifdef CONFIG_X86_LOCAL_APIC
1222 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1225 * Parse MADT LAPIC entries
1227 error = early_acpi_parse_madt_lapic_addr_ovr();
1230 smp_found_config = 1;
1232 if (error == -EINVAL) {
1234 * Dell Precision Workstation 410, 610 come here.
1236 printk(KERN_ERR PREFIX
1237 "Invalid BIOS MADT, disabling ACPI\n");
1244 static void __init acpi_process_madt(void)
1246 #ifdef CONFIG_X86_LOCAL_APIC
1249 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1252 * Parse MADT LAPIC entries
1254 error = acpi_parse_madt_lapic_entries();
1259 * Parse MADT IO-APIC entries
1261 error = acpi_parse_madt_ioapic_entries();
1263 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1266 smp_found_config = 1;
1269 if (error == -EINVAL) {
1271 * Dell Precision Workstation 410, 610 come here.
1273 printk(KERN_ERR PREFIX
1274 "Invalid BIOS MADT, disabling ACPI\n");
1279 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1280 * In the event an MPS table was found, forget it.
1281 * Boot with "acpi=off" to use MPS on such a system.
1283 if (smp_found_config) {
1284 printk(KERN_WARNING PREFIX
1285 "No APIC-table, disabling MPS\n");
1286 smp_found_config = 0;
1291 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1292 * processors, where MPS only supports physical.
1294 if (acpi_lapic && acpi_ioapic)
1295 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1297 else if (acpi_lapic)
1298 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1299 "configuration information\n");
1304 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1307 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1314 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1317 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1324 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1327 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1331 "Warning: DMI blacklist says broken, but acpi forced\n");
1337 * Force ignoring BIOS IRQ0 pin2 override
1339 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1342 * The ati_ixp4x0_rev() early PCI quirk should have set
1343 * the acpi_skip_timer_override flag already:
1345 if (!acpi_skip_timer_override) {
1346 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1347 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1349 acpi_skip_timer_override = 1;
1355 * If your system is blacklisted here, but you find that acpi=force
1356 * works for you, please contact linux-acpi@vger.kernel.org
1358 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1360 * Boxes that need ACPI disabled
1363 .callback = dmi_disable_acpi,
1364 .ident = "IBM Thinkpad",
1366 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1367 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1372 * Boxes that need ACPI PCI IRQ routing disabled
1375 .callback = disable_acpi_irq,
1376 .ident = "ASUS A7V",
1378 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1379 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1380 /* newer BIOS, Revision 1011, does work */
1381 DMI_MATCH(DMI_BIOS_VERSION,
1382 "ASUS A7V ACPI BIOS Revision 1007"),
1387 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1388 * for LPC bridge, which is needed for the PCI
1389 * interrupt links to work. DSDT fix is in bug 5966.
1390 * 2645, 2646 model numbers are shared with 600/600E/600X
1392 .callback = disable_acpi_irq,
1393 .ident = "IBM Thinkpad 600 Series 2645",
1395 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1396 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1400 .callback = disable_acpi_irq,
1401 .ident = "IBM Thinkpad 600 Series 2646",
1403 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1404 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1408 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1411 .callback = disable_acpi_pci,
1412 .ident = "ASUS PR-DLS",
1414 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1415 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1416 DMI_MATCH(DMI_BIOS_VERSION,
1417 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1418 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1422 .callback = disable_acpi_pci,
1423 .ident = "Acer TravelMate 36x Laptop",
1425 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1426 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1432 /* second table for DMI checks that should run after early-quirks */
1433 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1435 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1436 * which includes some code which overrides all temperature
1437 * trip points to 16C if the INTIN2 input of the I/O APIC
1438 * is enabled. This input is incorrectly designated the
1439 * ISA IRQ 0 via an interrupt source override even though
1440 * it is wired to the output of the master 8259A and INTIN0
1441 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1442 * override in that cases.
1445 .callback = dmi_ignore_irq0_timer_override,
1446 .ident = "HP nx6115 laptop",
1448 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1449 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1453 .callback = dmi_ignore_irq0_timer_override,
1454 .ident = "HP NX6125 laptop",
1456 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1457 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1461 .callback = dmi_ignore_irq0_timer_override,
1462 .ident = "HP NX6325 laptop",
1464 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1465 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1469 .callback = dmi_ignore_irq0_timer_override,
1470 .ident = "HP 6715b laptop",
1472 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1473 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1480 * acpi_boot_table_init() and acpi_boot_init()
1481 * called from setup_arch(), always.
1482 * 1. checksums all tables
1483 * 2. enumerates lapics
1484 * 3. enumerates io-apics
1486 * acpi_table_init() is separate to allow reading SRAT without
1487 * other side effects.
1489 * side effects of acpi_boot_init:
1490 * acpi_lapic = 1 if LAPIC found
1491 * acpi_ioapic = 1 if IOAPIC found
1492 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1493 * if acpi_blacklisted() acpi_disabled = 1;
1494 * acpi_irq_model=...
1498 void __init acpi_boot_table_init(void)
1500 dmi_check_system(acpi_dmi_table);
1503 * If acpi_disabled, bail out
1504 * One exception: acpi=ht continues far enough to enumerate LAPICs
1506 if (acpi_disabled && !acpi_ht)
1510 * Initialize the ACPI boot-time table parser.
1512 if (acpi_table_init()) {
1517 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1520 * blacklist may disable ACPI entirely
1522 if (acpi_blacklisted()) {
1524 printk(KERN_WARNING PREFIX "acpi=force override\n");
1526 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1533 int __init early_acpi_boot_init(void)
1536 * If acpi_disabled, bail out
1537 * One exception: acpi=ht continues far enough to enumerate LAPICs
1539 if (acpi_disabled && !acpi_ht)
1543 * Process the Multiple APIC Description Table (MADT), if present
1545 early_acpi_process_madt();
1550 int __init acpi_boot_init(void)
1552 /* those are executed after early-quirks are executed */
1553 dmi_check_system(acpi_dmi_table_late);
1556 * If acpi_disabled, bail out
1557 * One exception: acpi=ht continues far enough to enumerate LAPICs
1559 if (acpi_disabled && !acpi_ht)
1562 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1565 * set sci_int and PM timer address
1567 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1570 * Process the Multiple APIC Description Table (MADT), if present
1572 acpi_process_madt();
1574 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1577 x86_init.pci.init = pci_acpi_init;
1582 static int __init parse_acpi(char *arg)
1587 /* "acpi=off" disables both ACPI table parsing and interpreter */
1588 if (strcmp(arg, "off") == 0) {
1591 /* acpi=force to over-ride black-list */
1592 else if (strcmp(arg, "force") == 0) {
1597 /* acpi=strict disables out-of-spec workarounds */
1598 else if (strcmp(arg, "strict") == 0) {
1601 /* Limit ACPI just to boot-time to enable HT */
1602 else if (strcmp(arg, "ht") == 0) {
1604 printk(KERN_WARNING "acpi=ht will be removed in Linux-2.6.35\n");
1609 /* acpi=rsdt use RSDT instead of XSDT */
1610 else if (strcmp(arg, "rsdt") == 0) {
1611 acpi_rsdt_forced = 1;
1613 /* "acpi=noirq" disables ACPI interrupt routing */
1614 else if (strcmp(arg, "noirq") == 0) {
1617 /* "acpi=copy_dsdt" copys DSDT */
1618 else if (strcmp(arg, "copy_dsdt") == 0) {
1619 acpi_gbl_copy_dsdt_locally = 1;
1621 /* Core will printk when we return error. */
1626 early_param("acpi", parse_acpi);
1628 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1629 static int __init parse_pci(char *arg)
1631 if (arg && strcmp(arg, "noacpi") == 0)
1635 early_param("pci", parse_pci);
1637 int __init acpi_mps_check(void)
1639 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1640 /* mptable code is not built-in*/
1641 if (acpi_disabled || acpi_noirq) {
1642 printk(KERN_WARNING "MPS support code is not built-in.\n"
1643 "Using acpi=off or acpi=noirq or pci=noacpi "
1644 "may have problem\n");
1651 #ifdef CONFIG_X86_IO_APIC
1652 static int __init parse_acpi_skip_timer_override(char *arg)
1654 acpi_skip_timer_override = 1;
1657 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1659 static int __init parse_acpi_use_timer_override(char *arg)
1661 acpi_use_timer_override = 1;
1664 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1665 #endif /* CONFIG_X86_IO_APIC */
1667 static int __init setup_acpi_sci(char *s)
1671 if (!strcmp(s, "edge"))
1672 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1673 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1674 else if (!strcmp(s, "level"))
1675 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1676 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1677 else if (!strcmp(s, "high"))
1678 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1679 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1680 else if (!strcmp(s, "low"))
1681 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1682 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1687 early_param("acpi_sci", setup_acpi_sci);
1689 int __acpi_acquire_global_lock(unsigned int *lock)
1691 unsigned int old, new, val;
1694 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1695 val = cmpxchg(lock, old, new);
1696 } while (unlikely (val != old));
1697 return (new < 3) ? -1 : 0;
1700 int __acpi_release_global_lock(unsigned int *lock)
1702 unsigned int old, new, val;
1706 val = cmpxchg(lock, old, new);
1707 } while (unlikely (val != old));