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);
71 u8 acpi_sci_flags __initdata;
72 int acpi_sci_override_gsi __initdata;
73 int acpi_skip_timer_override __initdata;
74 int acpi_use_timer_override __initdata;
75 int acpi_fix_pin2_polarity __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)
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_top)
135 else if (irq < (gsi_top + 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 acpi_register_lapic(int id, u8 enabled)
200 unsigned int ver = 0;
202 if (id >= (MAX_LOCAL_APIC-1)) {
203 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
212 if (boot_cpu_physical_apicid != -1U)
213 ver = apic_version[boot_cpu_physical_apicid];
215 generic_processor_info(id, ver);
219 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
221 struct acpi_madt_local_x2apic *processor = NULL;
225 processor = (struct acpi_madt_local_x2apic *)header;
227 if (BAD_MADT_ENTRY(processor, end))
230 acpi_table_print_madt_entry(header);
232 apic_id = processor->local_apic_id;
233 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
234 #ifdef CONFIG_X86_X2APIC
236 * We need to register disabled CPU as well to permit
237 * counting disabled CPUs. This allows us to size
238 * cpus_possible_map more accurately, to permit
239 * to not preallocating memory for all NR_CPUS
240 * when we use CPU hotplug.
242 if (!apic->apic_id_valid(apic_id) && enabled)
243 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
245 acpi_register_lapic(apic_id, enabled);
247 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
254 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
256 struct acpi_madt_local_apic *processor = NULL;
258 processor = (struct acpi_madt_local_apic *)header;
260 if (BAD_MADT_ENTRY(processor, end))
263 acpi_table_print_madt_entry(header);
266 * We need to register disabled CPU as well to permit
267 * counting disabled CPUs. This allows us to size
268 * cpus_possible_map more accurately, to permit
269 * to not preallocating memory for all NR_CPUS
270 * when we use CPU hotplug.
272 acpi_register_lapic(processor->id, /* APIC ID */
273 processor->lapic_flags & ACPI_MADT_ENABLED);
279 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
281 struct acpi_madt_local_sapic *processor = NULL;
283 processor = (struct acpi_madt_local_sapic *)header;
285 if (BAD_MADT_ENTRY(processor, end))
288 acpi_table_print_madt_entry(header);
290 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
291 processor->lapic_flags & ACPI_MADT_ENABLED);
297 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
298 const unsigned long end)
300 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
302 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
304 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
307 acpi_lapic_addr = lapic_addr_ovr->address;
313 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
314 const unsigned long end)
316 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
318 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
320 if (BAD_MADT_ENTRY(x2apic_nmi, end))
323 acpi_table_print_madt_entry(header);
325 if (x2apic_nmi->lint != 1)
326 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
332 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
334 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
336 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
338 if (BAD_MADT_ENTRY(lapic_nmi, end))
341 acpi_table_print_madt_entry(header);
343 if (lapic_nmi->lint != 1)
344 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
349 #endif /*CONFIG_X86_LOCAL_APIC */
351 #ifdef CONFIG_X86_IO_APIC
354 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
356 struct acpi_madt_io_apic *ioapic = NULL;
358 ioapic = (struct acpi_madt_io_apic *)header;
360 if (BAD_MADT_ENTRY(ioapic, end))
363 acpi_table_print_madt_entry(header);
365 mp_register_ioapic(ioapic->id,
366 ioapic->address, ioapic->global_irq_base);
372 * Parse Interrupt Source Override for the ACPI SCI
374 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
376 if (trigger == 0) /* compatible SCI trigger is level */
379 if (polarity == 0) /* compatible SCI polarity is low */
382 /* Command-line over-ride via acpi_sci= */
383 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
384 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
386 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
387 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
390 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
391 * If GSI is < 16, this will update its flags,
392 * else it will create a new mp_irqs[] entry.
394 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
397 * stash over-ride to indicate we've been here
398 * and for later update of acpi_gbl_FADT
400 acpi_sci_override_gsi = gsi;
405 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
406 const unsigned long end)
408 struct acpi_madt_interrupt_override *intsrc = NULL;
410 intsrc = (struct acpi_madt_interrupt_override *)header;
412 if (BAD_MADT_ENTRY(intsrc, end))
415 acpi_table_print_madt_entry(header);
417 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
418 acpi_sci_ioapic_setup(intsrc->source_irq,
419 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
420 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
425 if (intsrc->source_irq == 0) {
426 if (acpi_skip_timer_override) {
427 printk(PREFIX "BIOS IRQ0 override ignored.\n");
431 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
432 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
433 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
434 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
438 mp_override_legacy_irq(intsrc->source_irq,
439 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
440 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
447 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
449 struct acpi_madt_nmi_source *nmi_src = NULL;
451 nmi_src = (struct acpi_madt_nmi_source *)header;
453 if (BAD_MADT_ENTRY(nmi_src, end))
456 acpi_table_print_madt_entry(header);
458 /* TBD: Support nimsrc entries? */
463 #endif /* CONFIG_X86_IO_APIC */
466 * acpi_pic_sci_set_trigger()
468 * use ELCR to set PIC-mode trigger type for SCI
470 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
471 * it may require Edge Trigger -- use "acpi_sci=edge"
473 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
474 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
475 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
476 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
479 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
481 unsigned int mask = 1 << irq;
482 unsigned int old, new;
484 /* Real old ELCR mask */
485 old = inb(0x4d0) | (inb(0x4d1) << 8);
488 * If we use ACPI to set PCI IRQs, then we should clear ELCR
489 * since we will set it correctly as we enable the PCI irq
492 new = acpi_noirq ? old : 0;
495 * Update SCI information in the ELCR, it isn't in the PCI
499 case 1: /* Edge - clear */
502 case 3: /* Level - set */
510 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
512 outb(new >> 8, 0x4d1);
515 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
517 *irq = gsi_to_irq(gsi);
519 #ifdef CONFIG_X86_IO_APIC
520 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
521 setup_IO_APIC_irq_extra(gsi);
526 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
528 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
532 *gsi = irq_to_gsi(isa_irq);
536 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
537 int trigger, int polarity)
541 * Make sure all (legacy) PCI IRQs are set as level-triggered.
543 if (trigger == ACPI_LEVEL_SENSITIVE)
544 eisa_set_level_irq(gsi);
550 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
551 int trigger, int polarity)
553 #ifdef CONFIG_X86_IO_APIC
554 gsi = mp_register_gsi(dev, gsi, trigger, polarity);
560 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
561 int trigger, int polarity) = acpi_register_gsi_pic;
563 #ifdef CONFIG_ACPI_SLEEP
564 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
566 int (*acpi_suspend_lowlevel)(void);
570 * success: return IRQ number (>=0)
571 * failure: return < 0
573 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
576 unsigned int plat_gsi = gsi;
578 plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity);
579 irq = gsi_to_irq(plat_gsi);
583 EXPORT_SYMBOL_GPL(acpi_register_gsi);
585 void acpi_unregister_gsi(u32 gsi)
588 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
590 void __init acpi_set_irq_model_pic(void)
592 acpi_irq_model = ACPI_IRQ_MODEL_PIC;
593 __acpi_register_gsi = acpi_register_gsi_pic;
597 void __init acpi_set_irq_model_ioapic(void)
599 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
600 __acpi_register_gsi = acpi_register_gsi_ioapic;
605 * ACPI based hotplug support for CPU
607 #ifdef CONFIG_ACPI_HOTPLUG_CPU
608 #include <acpi/processor.h>
610 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
612 #ifdef CONFIG_ACPI_NUMA
615 nid = acpi_get_node(handle);
616 if (nid == -1 || !node_online(nid))
618 set_apicid_to_node(physid, nid);
619 numa_set_node(cpu, nid);
623 static int _acpi_map_lsapic(acpi_handle handle, int *pcpu)
625 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
626 union acpi_object *obj;
627 struct acpi_madt_local_apic *lapic;
628 cpumask_var_t tmp_map, new_map;
631 int retval = -ENOMEM;
633 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
636 if (!buffer.length || !buffer.pointer)
639 obj = buffer.pointer;
640 if (obj->type != ACPI_TYPE_BUFFER ||
641 obj->buffer.length < sizeof(*lapic)) {
642 kfree(buffer.pointer);
646 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
648 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
649 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
650 kfree(buffer.pointer);
656 kfree(buffer.pointer);
657 buffer.length = ACPI_ALLOCATE_BUFFER;
658 buffer.pointer = NULL;
661 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
664 if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
667 cpumask_copy(tmp_map, cpu_present_mask);
668 acpi_register_lapic(physid, ACPI_MADT_ENABLED);
671 * If acpi_register_lapic successfully generates a new logical cpu
672 * number, then the following will get us exactly what was mapped
674 cpumask_andnot(new_map, cpu_present_mask, tmp_map);
675 if (cpumask_empty(new_map)) {
676 printk ("Unable to map lapic to logical cpu number\n");
681 acpi_processor_set_pdc(handle);
683 cpu = cpumask_first(new_map);
684 acpi_map_cpu2node(handle, cpu, physid);
690 free_cpumask_var(new_map);
692 free_cpumask_var(tmp_map);
697 /* wrapper to silence section mismatch warning */
698 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
700 return _acpi_map_lsapic(handle, pcpu);
702 EXPORT_SYMBOL(acpi_map_lsapic);
704 int acpi_unmap_lsapic(int cpu)
706 #ifdef CONFIG_ACPI_NUMA
707 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
710 per_cpu(x86_cpu_to_apicid, cpu) = -1;
711 set_cpu_present(cpu, false);
717 EXPORT_SYMBOL(acpi_unmap_lsapic);
718 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
720 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
726 EXPORT_SYMBOL(acpi_register_ioapic);
728 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
734 EXPORT_SYMBOL(acpi_unregister_ioapic);
736 static int __init acpi_parse_sbf(struct acpi_table_header *table)
738 struct acpi_table_boot *sb;
740 sb = (struct acpi_table_boot *)table;
742 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
746 sbf_port = sb->cmos_index; /* Save CMOS port */
751 #ifdef CONFIG_HPET_TIMER
752 #include <asm/hpet.h>
754 static struct __initdata resource *hpet_res;
756 static int __init acpi_parse_hpet(struct acpi_table_header *table)
758 struct acpi_table_hpet *hpet_tbl;
760 hpet_tbl = (struct acpi_table_hpet *)table;
762 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
766 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
767 printk(KERN_WARNING PREFIX "HPET timers must be located in "
772 hpet_address = hpet_tbl->address.address;
773 hpet_blockid = hpet_tbl->sequence;
776 * Some broken BIOSes advertise HPET at 0x0. We really do not
777 * want to allocate a resource there.
780 printk(KERN_WARNING PREFIX
781 "HPET id: %#x base: %#lx is invalid\n",
782 hpet_tbl->id, hpet_address);
787 * Some even more broken BIOSes advertise HPET at
788 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
791 if (hpet_address == 0xfed0000000000000UL) {
792 if (!hpet_force_user) {
793 printk(KERN_WARNING PREFIX "HPET id: %#x "
794 "base: 0xfed0000000000000 is bogus\n "
795 "try hpet=force on the kernel command line to "
796 "fix it up to 0xfed00000.\n", hpet_tbl->id);
800 printk(KERN_WARNING PREFIX
801 "HPET id: %#x base: 0xfed0000000000000 fixed up "
802 "to 0xfed00000.\n", hpet_tbl->id);
806 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
807 hpet_tbl->id, hpet_address);
810 * Allocate and initialize the HPET firmware resource for adding into
811 * the resource tree during the lateinit timeframe.
813 #define HPET_RESOURCE_NAME_SIZE 9
814 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
816 hpet_res->name = (void *)&hpet_res[1];
817 hpet_res->flags = IORESOURCE_MEM;
818 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
821 hpet_res->start = hpet_address;
822 hpet_res->end = hpet_address + (1 * 1024) - 1;
828 * hpet_insert_resource inserts the HPET resources used into the resource
831 static __init int hpet_insert_resource(void)
836 return insert_resource(&iomem_resource, hpet_res);
839 late_initcall(hpet_insert_resource);
842 #define acpi_parse_hpet NULL
845 static int __init acpi_parse_fadt(struct acpi_table_header *table)
848 #ifdef CONFIG_X86_PM_TIMER
849 /* detect the location of the ACPI PM Timer */
850 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
852 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
853 ACPI_ADR_SPACE_SYSTEM_IO)
856 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
858 * "X" fields are optional extensions to the original V1.0
859 * fields, so we must selectively expand V1.0 fields if the
860 * corresponding X field is zero.
863 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
866 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
869 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
875 #ifdef CONFIG_X86_LOCAL_APIC
877 * Parse LAPIC entries in MADT
878 * returns 0 on success, < 0 on error
881 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
889 * Note that the LAPIC address is obtained from the MADT (32-bit value)
890 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
894 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
895 acpi_parse_lapic_addr_ovr, 0);
897 printk(KERN_ERR PREFIX
898 "Error parsing LAPIC address override entry\n");
902 register_lapic_address(acpi_lapic_addr);
907 static int __init acpi_parse_madt_lapic_entries(void)
916 * Note that the LAPIC address is obtained from the MADT (32-bit value)
917 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
921 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
922 acpi_parse_lapic_addr_ovr, 0);
924 printk(KERN_ERR PREFIX
925 "Error parsing LAPIC address override entry\n");
929 register_lapic_address(acpi_lapic_addr);
931 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
932 acpi_parse_sapic, MAX_LOCAL_APIC);
935 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
936 acpi_parse_x2apic, MAX_LOCAL_APIC);
937 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
938 acpi_parse_lapic, MAX_LOCAL_APIC);
940 if (!count && !x2count) {
941 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
942 /* TBD: Cleanup to allow fallback to MPS */
944 } else if (count < 0 || x2count < 0) {
945 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
946 /* TBD: Cleanup to allow fallback to MPS */
951 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
952 acpi_parse_x2apic_nmi, 0);
954 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
955 if (count < 0 || x2count < 0) {
956 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
957 /* TBD: Cleanup to allow fallback to MPS */
962 #endif /* CONFIG_X86_LOCAL_APIC */
964 #ifdef CONFIG_X86_IO_APIC
967 #ifdef CONFIG_X86_ES7000
968 extern int es7000_plat;
971 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
975 struct mpc_intsrc mp_irq;
978 * Convert 'gsi' to 'ioapic.pin'.
980 ioapic = mp_find_ioapic(gsi);
983 pin = mp_find_ioapic_pin(ioapic, gsi);
986 * TBD: This check is for faulty timer entries, where the override
987 * erroneously sets the trigger to level, resulting in a HUGE
988 * increase of timer interrupts!
990 if ((bus_irq == 0) && (trigger == 3))
993 mp_irq.type = MP_INTSRC;
994 mp_irq.irqtype = mp_INT;
995 mp_irq.irqflag = (trigger << 2) | polarity;
996 mp_irq.srcbus = MP_ISA_BUS;
997 mp_irq.srcbusirq = bus_irq; /* IRQ */
998 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
999 mp_irq.dstirq = pin; /* INTIN# */
1001 mp_save_irq(&mp_irq);
1003 isa_irq_to_gsi[bus_irq] = gsi;
1006 void __init mp_config_acpi_legacy_irqs(void)
1009 struct mpc_intsrc mp_irq;
1013 * Fabricate the legacy ISA bus (bus #31).
1015 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1017 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1018 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1020 #ifdef CONFIG_X86_ES7000
1022 * Older generations of ES7000 have no legacy identity mappings
1024 if (es7000_plat == 1)
1029 * Use the default configuration for the IRQs 0-15. Unless
1030 * overridden by (MADT) interrupt source override entries.
1032 for (i = 0; i < 16; i++) {
1034 unsigned int dstapic;
1038 /* Locate the gsi that irq i maps to. */
1039 if (acpi_isa_irq_to_gsi(i, &gsi))
1043 * Locate the IOAPIC that manages the ISA IRQ.
1045 ioapic = mp_find_ioapic(gsi);
1048 pin = mp_find_ioapic_pin(ioapic, gsi);
1049 dstapic = mpc_ioapic_id(ioapic);
1051 for (idx = 0; idx < mp_irq_entries; idx++) {
1052 struct mpc_intsrc *irq = mp_irqs + idx;
1054 /* Do we already have a mapping for this ISA IRQ? */
1055 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1058 /* Do we already have a mapping for this IOAPIC pin */
1059 if (irq->dstapic == dstapic && irq->dstirq == pin)
1063 if (idx != mp_irq_entries) {
1064 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1065 continue; /* IRQ already used */
1068 mp_irq.type = MP_INTSRC;
1069 mp_irq.irqflag = 0; /* Conforming */
1070 mp_irq.srcbus = MP_ISA_BUS;
1071 mp_irq.dstapic = dstapic;
1072 mp_irq.irqtype = mp_INT;
1073 mp_irq.srcbusirq = i; /* Identity mapped */
1074 mp_irq.dstirq = pin;
1076 mp_save_irq(&mp_irq);
1080 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1083 #ifdef CONFIG_X86_MPPARSE
1084 struct mpc_intsrc mp_irq;
1085 struct pci_dev *pdev;
1086 unsigned char number;
1095 if (dev->bus != &pci_bus_type)
1098 pdev = to_pci_dev(dev);
1099 number = pdev->bus->number;
1100 devfn = pdev->devfn;
1102 /* print the entry should happen on mptable identically */
1103 mp_irq.type = MP_INTSRC;
1104 mp_irq.irqtype = mp_INT;
1105 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1106 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1107 mp_irq.srcbus = number;
1108 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1109 ioapic = mp_find_ioapic(gsi);
1110 mp_irq.dstapic = mpc_ioapic_id(ioapic);
1111 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1113 mp_save_irq(&mp_irq);
1118 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1122 struct io_apic_irq_attr irq_attr;
1124 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1127 /* Don't set up the ACPI SCI because it's already set up */
1128 if (acpi_gbl_FADT.sci_interrupt == gsi)
1131 ioapic = mp_find_ioapic(gsi);
1133 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1137 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1139 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1140 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1141 "%d-%d\n", mpc_ioapic_id(ioapic),
1146 if (enable_update_mptable)
1147 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1149 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1150 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1151 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1152 io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
1158 * Parse IOAPIC related entries in MADT
1159 * returns 0 on success, < 0 on error
1161 static int __init acpi_parse_madt_ioapic_entries(void)
1166 * ACPI interpreter is required to complete interrupt setup,
1167 * so if it is off, don't enumerate the io-apics with ACPI.
1168 * If MPS is present, it will handle them,
1169 * otherwise the system will stay in PIC mode
1171 if (acpi_disabled || acpi_noirq)
1178 * if "noapic" boot option, don't look for IO-APICs
1180 if (skip_ioapic_setup) {
1181 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1182 "due to 'noapic' option.\n");
1187 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1190 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1192 } else if (count < 0) {
1193 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1198 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1201 printk(KERN_ERR PREFIX
1202 "Error parsing interrupt source overrides entry\n");
1203 /* TBD: Cleanup to allow fallback to MPS */
1208 * If BIOS did not supply an INT_SRC_OVR for the SCI
1209 * pretend we got one so we can set the SCI flags.
1211 if (!acpi_sci_override_gsi)
1212 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1213 acpi_gbl_FADT.sci_interrupt);
1215 /* Fill in identity legacy mappings where no override */
1216 mp_config_acpi_legacy_irqs();
1219 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1222 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1223 /* TBD: Cleanup to allow fallback to MPS */
1230 static inline int acpi_parse_madt_ioapic_entries(void)
1234 #endif /* !CONFIG_X86_IO_APIC */
1236 static void __init early_acpi_process_madt(void)
1238 #ifdef CONFIG_X86_LOCAL_APIC
1241 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1244 * Parse MADT LAPIC entries
1246 error = early_acpi_parse_madt_lapic_addr_ovr();
1249 smp_found_config = 1;
1251 if (error == -EINVAL) {
1253 * Dell Precision Workstation 410, 610 come here.
1255 printk(KERN_ERR PREFIX
1256 "Invalid BIOS MADT, disabling ACPI\n");
1263 static void __init acpi_process_madt(void)
1265 #ifdef CONFIG_X86_LOCAL_APIC
1268 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1271 * Parse MADT LAPIC entries
1273 error = acpi_parse_madt_lapic_entries();
1278 * Parse MADT IO-APIC entries
1280 error = acpi_parse_madt_ioapic_entries();
1282 acpi_set_irq_model_ioapic();
1284 smp_found_config = 1;
1287 if (error == -EINVAL) {
1289 * Dell Precision Workstation 410, 610 come here.
1291 printk(KERN_ERR PREFIX
1292 "Invalid BIOS MADT, disabling ACPI\n");
1297 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1298 * In the event an MPS table was found, forget it.
1299 * Boot with "acpi=off" to use MPS on such a system.
1301 if (smp_found_config) {
1302 printk(KERN_WARNING PREFIX
1303 "No APIC-table, disabling MPS\n");
1304 smp_found_config = 0;
1309 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1310 * processors, where MPS only supports physical.
1312 if (acpi_lapic && acpi_ioapic)
1313 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1315 else if (acpi_lapic)
1316 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1317 "configuration information\n");
1322 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1325 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1332 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1335 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1342 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1345 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1349 "Warning: DMI blacklist says broken, but acpi forced\n");
1355 * Force ignoring BIOS IRQ0 override
1357 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1359 if (!acpi_skip_timer_override) {
1360 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1362 acpi_skip_timer_override = 1;
1368 * If your system is blacklisted here, but you find that acpi=force
1369 * works for you, please contact linux-acpi@vger.kernel.org
1371 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1373 * Boxes that need ACPI disabled
1376 .callback = dmi_disable_acpi,
1377 .ident = "IBM Thinkpad",
1379 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1380 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1385 * Boxes that need ACPI PCI IRQ routing disabled
1388 .callback = disable_acpi_irq,
1389 .ident = "ASUS A7V",
1391 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1392 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1393 /* newer BIOS, Revision 1011, does work */
1394 DMI_MATCH(DMI_BIOS_VERSION,
1395 "ASUS A7V ACPI BIOS Revision 1007"),
1400 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1401 * for LPC bridge, which is needed for the PCI
1402 * interrupt links to work. DSDT fix is in bug 5966.
1403 * 2645, 2646 model numbers are shared with 600/600E/600X
1405 .callback = disable_acpi_irq,
1406 .ident = "IBM Thinkpad 600 Series 2645",
1408 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1409 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1413 .callback = disable_acpi_irq,
1414 .ident = "IBM Thinkpad 600 Series 2646",
1416 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1417 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1421 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1424 .callback = disable_acpi_pci,
1425 .ident = "ASUS PR-DLS",
1427 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1428 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1429 DMI_MATCH(DMI_BIOS_VERSION,
1430 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1431 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1435 .callback = disable_acpi_pci,
1436 .ident = "Acer TravelMate 36x Laptop",
1438 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1439 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1445 /* second table for DMI checks that should run after early-quirks */
1446 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1448 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1449 * which includes some code which overrides all temperature
1450 * trip points to 16C if the INTIN2 input of the I/O APIC
1451 * is enabled. This input is incorrectly designated the
1452 * ISA IRQ 0 via an interrupt source override even though
1453 * it is wired to the output of the master 8259A and INTIN0
1454 * is not connected at all. Force ignoring BIOS IRQ0
1455 * override in that cases.
1458 .callback = dmi_ignore_irq0_timer_override,
1459 .ident = "HP nx6115 laptop",
1461 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1462 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1466 .callback = dmi_ignore_irq0_timer_override,
1467 .ident = "HP NX6125 laptop",
1469 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1470 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1474 .callback = dmi_ignore_irq0_timer_override,
1475 .ident = "HP NX6325 laptop",
1477 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1478 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1482 .callback = dmi_ignore_irq0_timer_override,
1483 .ident = "HP 6715b laptop",
1485 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1486 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1490 .callback = dmi_ignore_irq0_timer_override,
1491 .ident = "FUJITSU SIEMENS",
1493 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1494 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1501 * acpi_boot_table_init() and acpi_boot_init()
1502 * called from setup_arch(), always.
1503 * 1. checksums all tables
1504 * 2. enumerates lapics
1505 * 3. enumerates io-apics
1507 * acpi_table_init() is separate to allow reading SRAT without
1508 * other side effects.
1510 * side effects of acpi_boot_init:
1511 * acpi_lapic = 1 if LAPIC found
1512 * acpi_ioapic = 1 if IOAPIC found
1513 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1514 * if acpi_blacklisted() acpi_disabled = 1;
1515 * acpi_irq_model=...
1519 void __init acpi_boot_table_init(void)
1521 dmi_check_system(acpi_dmi_table);
1524 * If acpi_disabled, bail out
1530 * Initialize the ACPI boot-time table parser.
1532 if (acpi_table_init()) {
1537 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1540 * blacklist may disable ACPI entirely
1542 if (acpi_blacklisted()) {
1544 printk(KERN_WARNING PREFIX "acpi=force override\n");
1546 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1553 int __init early_acpi_boot_init(void)
1556 * If acpi_disabled, bail out
1562 * Process the Multiple APIC Description Table (MADT), if present
1564 early_acpi_process_madt();
1569 int __init acpi_boot_init(void)
1571 /* those are executed after early-quirks are executed */
1572 dmi_check_system(acpi_dmi_table_late);
1575 * If acpi_disabled, bail out
1580 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1583 * set sci_int and PM timer address
1585 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1588 * Process the Multiple APIC Description Table (MADT), if present
1590 acpi_process_madt();
1592 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1595 x86_init.pci.init = pci_acpi_init;
1600 static int __init parse_acpi(char *arg)
1605 /* "acpi=off" disables both ACPI table parsing and interpreter */
1606 if (strcmp(arg, "off") == 0) {
1609 /* acpi=force to over-ride black-list */
1610 else if (strcmp(arg, "force") == 0) {
1614 /* acpi=strict disables out-of-spec workarounds */
1615 else if (strcmp(arg, "strict") == 0) {
1618 /* acpi=rsdt use RSDT instead of XSDT */
1619 else if (strcmp(arg, "rsdt") == 0) {
1620 acpi_rsdt_forced = 1;
1622 /* "acpi=noirq" disables ACPI interrupt routing */
1623 else if (strcmp(arg, "noirq") == 0) {
1626 /* "acpi=copy_dsdt" copys DSDT */
1627 else if (strcmp(arg, "copy_dsdt") == 0) {
1628 acpi_gbl_copy_dsdt_locally = 1;
1630 /* Core will printk when we return error. */
1635 early_param("acpi", parse_acpi);
1637 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1638 static int __init parse_pci(char *arg)
1640 if (arg && strcmp(arg, "noacpi") == 0)
1644 early_param("pci", parse_pci);
1646 int __init acpi_mps_check(void)
1648 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1649 /* mptable code is not built-in*/
1650 if (acpi_disabled || acpi_noirq) {
1651 printk(KERN_WARNING "MPS support code is not built-in.\n"
1652 "Using acpi=off or acpi=noirq or pci=noacpi "
1653 "may have problem\n");
1660 #ifdef CONFIG_X86_IO_APIC
1661 static int __init parse_acpi_skip_timer_override(char *arg)
1663 acpi_skip_timer_override = 1;
1666 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1668 static int __init parse_acpi_use_timer_override(char *arg)
1670 acpi_use_timer_override = 1;
1673 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1674 #endif /* CONFIG_X86_IO_APIC */
1676 static int __init setup_acpi_sci(char *s)
1680 if (!strcmp(s, "edge"))
1681 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1682 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1683 else if (!strcmp(s, "level"))
1684 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1685 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1686 else if (!strcmp(s, "high"))
1687 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1688 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1689 else if (!strcmp(s, "low"))
1690 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1691 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1696 early_param("acpi_sci", setup_acpi_sci);
1698 int __acpi_acquire_global_lock(unsigned int *lock)
1700 unsigned int old, new, val;
1703 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1704 val = cmpxchg(lock, old, new);
1705 } while (unlikely (val != old));
1706 return (new < 3) ? -1 : 0;
1709 int __acpi_release_global_lock(unsigned int *lock)
1711 unsigned int old, new, val;
1715 val = cmpxchg(lock, old, new);
1716 } while (unlikely (val != old));
1720 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1722 e820_add_region(addr, size, E820_ACPI);