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/irqdomain.h>
35 #include <linux/slab.h>
36 #include <linux/bootmem.h>
37 #include <linux/ioport.h>
38 #include <linux/pci.h>
40 #include <asm/pci_x86.h>
41 #include <asm/pgtable.h>
42 #include <asm/io_apic.h>
45 #include <asm/mpspec.h>
47 #include <asm/i8259.h>
49 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
50 static int __initdata acpi_force = 0;
52 EXPORT_SYMBOL(acpi_disabled);
55 # include <asm/proto.h>
58 #define PREFIX "ACPI: "
60 int acpi_noirq; /* skip ACPI IRQ initialization */
61 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
62 EXPORT_SYMBOL(acpi_pci_disabled);
67 int acpi_disable_cmcff;
69 u8 acpi_sci_flags __initdata;
70 int acpi_sci_override_gsi __initdata;
71 int acpi_skip_timer_override __initdata;
72 int acpi_use_timer_override __initdata;
73 int acpi_fix_pin2_polarity __initdata;
75 #ifdef CONFIG_X86_LOCAL_APIC
76 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
79 #ifndef __HAVE_ARCH_CMPXCHG
80 #warning ACPI uses CMPXCHG, i486 and later hardware
83 /* --------------------------------------------------------------------------
84 Boot-time Configuration
85 -------------------------------------------------------------------------- */
88 * The default interrupt routing model is PIC (8259). This gets
89 * overridden if IOAPICs are enumerated (below).
91 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
95 * ISA irqs by default are the first 16 gsis but can be
96 * any gsi as specified by an interrupt source override.
98 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
99 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
102 #define ACPI_INVALID_GSI INT_MIN
104 static int map_gsi_to_irq(unsigned int gsi, unsigned int flags)
108 for (i = 0; i < nr_legacy_irqs(); i++)
109 if (isa_irq_to_gsi[i] == gsi)
112 return mp_map_gsi_to_irq(gsi, flags);
116 * This is just a simple wrapper around early_ioremap(),
117 * with sanity checks for phys == 0 and size == 0.
119 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
125 return early_ioremap(phys, size);
128 void __init __acpi_unmap_table(char *map, unsigned long size)
133 early_iounmap(map, size);
136 #ifdef CONFIG_X86_LOCAL_APIC
137 static int __init acpi_parse_madt(struct acpi_table_header *table)
139 struct acpi_table_madt *madt = NULL;
144 madt = (struct acpi_table_madt *)table;
146 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
151 acpi_lapic_addr = (u64) madt->address;
153 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
157 default_acpi_madt_oem_check(madt->header.oem_id,
158 madt->header.oem_table_id);
164 * acpi_register_lapic - register a local apic and generates a logic cpu number
165 * @id: local apic id to register
166 * @enabled: this cpu is enabled or not
168 * Returns the logic cpu number which maps to the local apic
170 static int acpi_register_lapic(int id, u8 enabled)
172 unsigned int ver = 0;
174 if (id >= MAX_LOCAL_APIC) {
175 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
184 if (boot_cpu_physical_apicid != -1U)
185 ver = apic_version[boot_cpu_physical_apicid];
187 return generic_processor_info(id, ver);
191 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
193 struct acpi_madt_local_x2apic *processor = NULL;
197 processor = (struct acpi_madt_local_x2apic *)header;
199 if (BAD_MADT_ENTRY(processor, end))
202 acpi_table_print_madt_entry(header);
204 apic_id = processor->local_apic_id;
205 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
206 #ifdef CONFIG_X86_X2APIC
208 * We need to register disabled CPU as well to permit
209 * counting disabled CPUs. This allows us to size
210 * cpus_possible_map more accurately, to permit
211 * to not preallocating memory for all NR_CPUS
212 * when we use CPU hotplug.
214 if (!apic->apic_id_valid(apic_id) && enabled)
215 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
217 acpi_register_lapic(apic_id, enabled);
219 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
226 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
228 struct acpi_madt_local_apic *processor = NULL;
230 processor = (struct acpi_madt_local_apic *)header;
232 if (BAD_MADT_ENTRY(processor, end))
235 acpi_table_print_madt_entry(header);
238 * We need to register disabled CPU as well to permit
239 * counting disabled CPUs. This allows us to size
240 * cpus_possible_map more accurately, to permit
241 * to not preallocating memory for all NR_CPUS
242 * when we use CPU hotplug.
244 acpi_register_lapic(processor->id, /* APIC ID */
245 processor->lapic_flags & ACPI_MADT_ENABLED);
251 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
253 struct acpi_madt_local_sapic *processor = NULL;
255 processor = (struct acpi_madt_local_sapic *)header;
257 if (BAD_MADT_ENTRY(processor, end))
260 acpi_table_print_madt_entry(header);
262 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
263 processor->lapic_flags & ACPI_MADT_ENABLED);
269 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
270 const unsigned long end)
272 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
274 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
276 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
279 acpi_lapic_addr = lapic_addr_ovr->address;
285 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
286 const unsigned long end)
288 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
290 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
292 if (BAD_MADT_ENTRY(x2apic_nmi, end))
295 acpi_table_print_madt_entry(header);
297 if (x2apic_nmi->lint != 1)
298 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
304 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
306 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
308 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
310 if (BAD_MADT_ENTRY(lapic_nmi, end))
313 acpi_table_print_madt_entry(header);
315 if (lapic_nmi->lint != 1)
316 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
321 #endif /*CONFIG_X86_LOCAL_APIC */
323 #ifdef CONFIG_X86_IO_APIC
326 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
331 struct mpc_intsrc mp_irq;
334 * Convert 'gsi' to 'ioapic.pin'.
336 ioapic = mp_find_ioapic(gsi);
339 pin = mp_find_ioapic_pin(ioapic, gsi);
342 * TBD: This check is for faulty timer entries, where the override
343 * erroneously sets the trigger to level, resulting in a HUGE
344 * increase of timer interrupts!
346 if ((bus_irq == 0) && (trigger == 3))
349 mp_irq.type = MP_INTSRC;
350 mp_irq.irqtype = mp_INT;
351 mp_irq.irqflag = (trigger << 2) | polarity;
352 mp_irq.srcbus = MP_ISA_BUS;
353 mp_irq.srcbusirq = bus_irq; /* IRQ */
354 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
355 mp_irq.dstirq = pin; /* INTIN# */
357 mp_save_irq(&mp_irq);
360 * Reset default identity mapping if gsi is also an legacy IRQ,
361 * otherwise there will be more than one entry with the same GSI
362 * and acpi_isa_irq_to_gsi() may give wrong result.
364 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
365 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
366 isa_irq_to_gsi[bus_irq] = gsi;
369 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
372 #ifdef CONFIG_X86_MPPARSE
373 struct mpc_intsrc mp_irq;
374 struct pci_dev *pdev;
375 unsigned char number;
382 if (!dev || !dev_is_pci(dev))
385 pdev = to_pci_dev(dev);
386 number = pdev->bus->number;
389 /* print the entry should happen on mptable identically */
390 mp_irq.type = MP_INTSRC;
391 mp_irq.irqtype = mp_INT;
392 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
393 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
394 mp_irq.srcbus = number;
395 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
396 ioapic = mp_find_ioapic(gsi);
397 mp_irq.dstapic = mpc_ioapic_id(ioapic);
398 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
400 mp_save_irq(&mp_irq);
405 static int mp_register_gsi(struct device *dev, u32 gsi, int trigger,
411 struct io_apic_irq_attr irq_attr;
414 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
417 /* Don't set up the ACPI SCI because it's already set up */
418 if (acpi_gbl_FADT.sci_interrupt == gsi)
421 irq = map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC);
425 ioapic = mp_find_ioapic(gsi);
427 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
431 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
433 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
434 printk(KERN_ERR "Invalid reference to IOAPIC pin "
435 "%d-%d\n", mpc_ioapic_id(ioapic),
440 if (enable_update_mptable)
441 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
443 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
444 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
445 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
446 ret = io_apic_set_pci_routing(dev, irq, &irq_attr);
453 static struct irq_domain_ops acpi_irqdomain_ops;
456 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
458 struct acpi_madt_io_apic *ioapic = NULL;
459 struct ioapic_domain_cfg cfg = {
460 .type = IOAPIC_DOMAIN_DYNAMIC,
461 .ops = &acpi_irqdomain_ops,
464 ioapic = (struct acpi_madt_io_apic *)header;
466 if (BAD_MADT_ENTRY(ioapic, end))
469 acpi_table_print_madt_entry(header);
471 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
472 if (ioapic->global_irq_base < nr_legacy_irqs())
473 cfg.type = IOAPIC_DOMAIN_LEGACY;
475 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
482 * Parse Interrupt Source Override for the ACPI SCI
484 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
486 if (trigger == 0) /* compatible SCI trigger is level */
489 if (polarity == 0) /* compatible SCI polarity is low */
492 /* Command-line over-ride via acpi_sci= */
493 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
494 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
496 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
497 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
499 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
502 * stash over-ride to indicate we've been here
503 * and for later update of acpi_gbl_FADT
505 acpi_sci_override_gsi = gsi;
510 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
511 const unsigned long end)
513 struct acpi_madt_interrupt_override *intsrc = NULL;
515 intsrc = (struct acpi_madt_interrupt_override *)header;
517 if (BAD_MADT_ENTRY(intsrc, end))
520 acpi_table_print_madt_entry(header);
522 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
523 acpi_sci_ioapic_setup(intsrc->source_irq,
524 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
525 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
530 if (intsrc->source_irq == 0) {
531 if (acpi_skip_timer_override) {
532 printk(PREFIX "BIOS IRQ0 override ignored.\n");
536 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
537 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
538 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
539 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
543 mp_override_legacy_irq(intsrc->source_irq,
544 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
545 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
552 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
554 struct acpi_madt_nmi_source *nmi_src = NULL;
556 nmi_src = (struct acpi_madt_nmi_source *)header;
558 if (BAD_MADT_ENTRY(nmi_src, end))
561 acpi_table_print_madt_entry(header);
563 /* TBD: Support nimsrc entries? */
568 #endif /* CONFIG_X86_IO_APIC */
571 * acpi_pic_sci_set_trigger()
573 * use ELCR to set PIC-mode trigger type for SCI
575 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
576 * it may require Edge Trigger -- use "acpi_sci=edge"
578 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
579 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
580 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
581 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
584 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
586 unsigned int mask = 1 << irq;
587 unsigned int old, new;
589 /* Real old ELCR mask */
590 old = inb(0x4d0) | (inb(0x4d1) << 8);
593 * If we use ACPI to set PCI IRQs, then we should clear ELCR
594 * since we will set it correctly as we enable the PCI irq
597 new = acpi_noirq ? old : 0;
600 * Update SCI information in the ELCR, it isn't in the PCI
604 case 1: /* Edge - clear */
607 case 3: /* Level - set */
615 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
617 outb(new >> 8, 0x4d1);
620 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
622 int irq = map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC | IOAPIC_MAP_CHECK);
625 #ifdef CONFIG_X86_IO_APIC
626 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
627 setup_IO_APIC_irq_extra(gsi);
635 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
637 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
639 if (isa_irq < nr_legacy_irqs() &&
640 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
641 *gsi = isa_irq_to_gsi[isa_irq];
648 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
649 int trigger, int polarity)
653 * Make sure all (legacy) PCI IRQs are set as level-triggered.
655 if (trigger == ACPI_LEVEL_SENSITIVE)
656 eisa_set_level_irq(gsi);
662 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
663 int trigger, int polarity)
667 #ifdef CONFIG_X86_IO_APIC
668 irq = mp_register_gsi(dev, gsi, trigger, polarity);
674 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
675 int trigger, int polarity) = acpi_register_gsi_pic;
677 #ifdef CONFIG_ACPI_SLEEP
678 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
680 int (*acpi_suspend_lowlevel)(void);
684 * success: return IRQ number (>=0)
685 * failure: return < 0
687 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
689 return __acpi_register_gsi(dev, gsi, trigger, polarity);
691 EXPORT_SYMBOL_GPL(acpi_register_gsi);
693 void acpi_unregister_gsi(u32 gsi)
696 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
698 static void __init acpi_set_irq_model_ioapic(void)
700 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
701 __acpi_register_gsi = acpi_register_gsi_ioapic;
706 * ACPI based hotplug support for CPU
708 #ifdef CONFIG_ACPI_HOTPLUG_CPU
709 #include <acpi/processor.h>
711 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
713 #ifdef CONFIG_ACPI_NUMA
716 nid = acpi_get_node(handle);
718 set_apicid_to_node(physid, nid);
719 numa_set_node(cpu, nid);
724 static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
728 cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED);
730 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
734 acpi_processor_set_pdc(handle);
735 acpi_map_cpu2node(handle, cpu, physid);
741 /* wrapper to silence section mismatch warning */
742 int __ref acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
744 return _acpi_map_lsapic(handle, physid, pcpu);
746 EXPORT_SYMBOL(acpi_map_lsapic);
748 int acpi_unmap_lsapic(int cpu)
750 #ifdef CONFIG_ACPI_NUMA
751 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
754 per_cpu(x86_cpu_to_apicid, cpu) = -1;
755 set_cpu_present(cpu, false);
761 EXPORT_SYMBOL(acpi_unmap_lsapic);
762 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
764 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
770 EXPORT_SYMBOL(acpi_register_ioapic);
772 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
778 EXPORT_SYMBOL(acpi_unregister_ioapic);
780 static int __init acpi_parse_sbf(struct acpi_table_header *table)
782 struct acpi_table_boot *sb;
784 sb = (struct acpi_table_boot *)table;
786 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
790 sbf_port = sb->cmos_index; /* Save CMOS port */
795 #ifdef CONFIG_HPET_TIMER
796 #include <asm/hpet.h>
798 static struct resource *hpet_res __initdata;
800 static int __init acpi_parse_hpet(struct acpi_table_header *table)
802 struct acpi_table_hpet *hpet_tbl;
804 hpet_tbl = (struct acpi_table_hpet *)table;
806 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
810 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
811 printk(KERN_WARNING PREFIX "HPET timers must be located in "
816 hpet_address = hpet_tbl->address.address;
817 hpet_blockid = hpet_tbl->sequence;
820 * Some broken BIOSes advertise HPET at 0x0. We really do not
821 * want to allocate a resource there.
824 printk(KERN_WARNING PREFIX
825 "HPET id: %#x base: %#lx is invalid\n",
826 hpet_tbl->id, hpet_address);
831 * Some even more broken BIOSes advertise HPET at
832 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
835 if (hpet_address == 0xfed0000000000000UL) {
836 if (!hpet_force_user) {
837 printk(KERN_WARNING PREFIX "HPET id: %#x "
838 "base: 0xfed0000000000000 is bogus\n "
839 "try hpet=force on the kernel command line to "
840 "fix it up to 0xfed00000.\n", hpet_tbl->id);
844 printk(KERN_WARNING PREFIX
845 "HPET id: %#x base: 0xfed0000000000000 fixed up "
846 "to 0xfed00000.\n", hpet_tbl->id);
850 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
851 hpet_tbl->id, hpet_address);
854 * Allocate and initialize the HPET firmware resource for adding into
855 * the resource tree during the lateinit timeframe.
857 #define HPET_RESOURCE_NAME_SIZE 9
858 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
860 hpet_res->name = (void *)&hpet_res[1];
861 hpet_res->flags = IORESOURCE_MEM;
862 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
865 hpet_res->start = hpet_address;
866 hpet_res->end = hpet_address + (1 * 1024) - 1;
872 * hpet_insert_resource inserts the HPET resources used into the resource
875 static __init int hpet_insert_resource(void)
880 return insert_resource(&iomem_resource, hpet_res);
883 late_initcall(hpet_insert_resource);
886 #define acpi_parse_hpet NULL
889 static int __init acpi_parse_fadt(struct acpi_table_header *table)
892 #ifdef CONFIG_X86_PM_TIMER
893 /* detect the location of the ACPI PM Timer */
894 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
896 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
897 ACPI_ADR_SPACE_SYSTEM_IO)
900 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
902 * "X" fields are optional extensions to the original V1.0
903 * fields, so we must selectively expand V1.0 fields if the
904 * corresponding X field is zero.
907 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
910 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
913 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
919 #ifdef CONFIG_X86_LOCAL_APIC
921 * Parse LAPIC entries in MADT
922 * returns 0 on success, < 0 on error
925 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
933 * Note that the LAPIC address is obtained from the MADT (32-bit value)
934 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
937 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
938 acpi_parse_lapic_addr_ovr, 0);
940 printk(KERN_ERR PREFIX
941 "Error parsing LAPIC address override entry\n");
945 register_lapic_address(acpi_lapic_addr);
950 static int __init acpi_parse_madt_lapic_entries(void)
959 * Note that the LAPIC address is obtained from the MADT (32-bit value)
960 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
963 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
964 acpi_parse_lapic_addr_ovr, 0);
966 printk(KERN_ERR PREFIX
967 "Error parsing LAPIC address override entry\n");
971 register_lapic_address(acpi_lapic_addr);
973 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
974 acpi_parse_sapic, MAX_LOCAL_APIC);
977 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
978 acpi_parse_x2apic, MAX_LOCAL_APIC);
979 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
980 acpi_parse_lapic, MAX_LOCAL_APIC);
982 if (!count && !x2count) {
983 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
984 /* TBD: Cleanup to allow fallback to MPS */
986 } else if (count < 0 || x2count < 0) {
987 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
988 /* TBD: Cleanup to allow fallback to MPS */
992 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
993 acpi_parse_x2apic_nmi, 0);
994 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
995 acpi_parse_lapic_nmi, 0);
996 if (count < 0 || x2count < 0) {
997 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
998 /* TBD: Cleanup to allow fallback to MPS */
1003 #endif /* CONFIG_X86_LOCAL_APIC */
1005 #ifdef CONFIG_X86_IO_APIC
1006 static 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);
1021 * Use the default configuration for the IRQs 0-15. Unless
1022 * overridden by (MADT) interrupt source override entries.
1024 for (i = 0; i < nr_legacy_irqs(); i++) {
1026 unsigned int dstapic;
1030 /* Locate the gsi that irq i maps to. */
1031 if (acpi_isa_irq_to_gsi(i, &gsi))
1035 * Locate the IOAPIC that manages the ISA IRQ.
1037 ioapic = mp_find_ioapic(gsi);
1040 pin = mp_find_ioapic_pin(ioapic, gsi);
1041 dstapic = mpc_ioapic_id(ioapic);
1043 for (idx = 0; idx < mp_irq_entries; idx++) {
1044 struct mpc_intsrc *irq = mp_irqs + idx;
1046 /* Do we already have a mapping for this ISA IRQ? */
1047 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1050 /* Do we already have a mapping for this IOAPIC pin */
1051 if (irq->dstapic == dstapic && irq->dstirq == pin)
1055 if (idx != mp_irq_entries) {
1056 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1057 continue; /* IRQ already used */
1060 mp_irq.type = MP_INTSRC;
1061 mp_irq.irqflag = 0; /* Conforming */
1062 mp_irq.srcbus = MP_ISA_BUS;
1063 mp_irq.dstapic = dstapic;
1064 mp_irq.irqtype = mp_INT;
1065 mp_irq.srcbusirq = i; /* Identity mapped */
1066 mp_irq.dstirq = pin;
1068 mp_save_irq(&mp_irq);
1073 * Parse IOAPIC related entries in MADT
1074 * returns 0 on success, < 0 on error
1076 static int __init acpi_parse_madt_ioapic_entries(void)
1081 * ACPI interpreter is required to complete interrupt setup,
1082 * so if it is off, don't enumerate the io-apics with ACPI.
1083 * If MPS is present, it will handle them,
1084 * otherwise the system will stay in PIC mode
1086 if (acpi_disabled || acpi_noirq)
1093 * if "noapic" boot option, don't look for IO-APICs
1095 if (skip_ioapic_setup) {
1096 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1097 "due to 'noapic' option.\n");
1101 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1104 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1106 } else if (count < 0) {
1107 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1111 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1112 acpi_parse_int_src_ovr, nr_irqs);
1114 printk(KERN_ERR PREFIX
1115 "Error parsing interrupt source overrides entry\n");
1116 /* TBD: Cleanup to allow fallback to MPS */
1121 * If BIOS did not supply an INT_SRC_OVR for the SCI
1122 * pretend we got one so we can set the SCI flags.
1124 if (!acpi_sci_override_gsi)
1125 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1126 acpi_gbl_FADT.sci_interrupt);
1128 /* Fill in identity legacy mappings where no override */
1129 mp_config_acpi_legacy_irqs();
1131 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1132 acpi_parse_nmi_src, nr_irqs);
1134 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1135 /* TBD: Cleanup to allow fallback to MPS */
1142 static inline int acpi_parse_madt_ioapic_entries(void)
1146 #endif /* !CONFIG_X86_IO_APIC */
1148 static void __init early_acpi_process_madt(void)
1150 #ifdef CONFIG_X86_LOCAL_APIC
1153 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1156 * Parse MADT LAPIC entries
1158 error = early_acpi_parse_madt_lapic_addr_ovr();
1161 smp_found_config = 1;
1163 if (error == -EINVAL) {
1165 * Dell Precision Workstation 410, 610 come here.
1167 printk(KERN_ERR PREFIX
1168 "Invalid BIOS MADT, disabling ACPI\n");
1175 static void __init acpi_process_madt(void)
1177 #ifdef CONFIG_X86_LOCAL_APIC
1180 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1183 * Parse MADT LAPIC entries
1185 error = acpi_parse_madt_lapic_entries();
1190 * Parse MADT IO-APIC entries
1192 error = acpi_parse_madt_ioapic_entries();
1194 acpi_set_irq_model_ioapic();
1196 smp_found_config = 1;
1199 if (error == -EINVAL) {
1201 * Dell Precision Workstation 410, 610 come here.
1203 printk(KERN_ERR PREFIX
1204 "Invalid BIOS MADT, disabling ACPI\n");
1209 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1210 * In the event an MPS table was found, forget it.
1211 * Boot with "acpi=off" to use MPS on such a system.
1213 if (smp_found_config) {
1214 printk(KERN_WARNING PREFIX
1215 "No APIC-table, disabling MPS\n");
1216 smp_found_config = 0;
1221 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1222 * processors, where MPS only supports physical.
1224 if (acpi_lapic && acpi_ioapic)
1225 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1227 else if (acpi_lapic)
1228 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1229 "configuration information\n");
1234 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1237 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1244 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1247 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1254 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1257 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1261 "Warning: DMI blacklist says broken, but acpi forced\n");
1267 * Force ignoring BIOS IRQ0 override
1269 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1271 if (!acpi_skip_timer_override) {
1272 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1274 acpi_skip_timer_override = 1;
1280 * If your system is blacklisted here, but you find that acpi=force
1281 * works for you, please contact linux-acpi@vger.kernel.org
1283 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1285 * Boxes that need ACPI disabled
1288 .callback = dmi_disable_acpi,
1289 .ident = "IBM Thinkpad",
1291 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1292 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1297 * Boxes that need ACPI PCI IRQ routing disabled
1300 .callback = disable_acpi_irq,
1301 .ident = "ASUS A7V",
1303 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1304 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1305 /* newer BIOS, Revision 1011, does work */
1306 DMI_MATCH(DMI_BIOS_VERSION,
1307 "ASUS A7V ACPI BIOS Revision 1007"),
1312 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1313 * for LPC bridge, which is needed for the PCI
1314 * interrupt links to work. DSDT fix is in bug 5966.
1315 * 2645, 2646 model numbers are shared with 600/600E/600X
1317 .callback = disable_acpi_irq,
1318 .ident = "IBM Thinkpad 600 Series 2645",
1320 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1321 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1325 .callback = disable_acpi_irq,
1326 .ident = "IBM Thinkpad 600 Series 2646",
1328 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1329 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1333 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1336 .callback = disable_acpi_pci,
1337 .ident = "ASUS PR-DLS",
1339 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1340 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1341 DMI_MATCH(DMI_BIOS_VERSION,
1342 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1343 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1347 .callback = disable_acpi_pci,
1348 .ident = "Acer TravelMate 36x Laptop",
1350 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1351 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1357 /* second table for DMI checks that should run after early-quirks */
1358 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1360 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1361 * which includes some code which overrides all temperature
1362 * trip points to 16C if the INTIN2 input of the I/O APIC
1363 * is enabled. This input is incorrectly designated the
1364 * ISA IRQ 0 via an interrupt source override even though
1365 * it is wired to the output of the master 8259A and INTIN0
1366 * is not connected at all. Force ignoring BIOS IRQ0
1367 * override in that cases.
1370 .callback = dmi_ignore_irq0_timer_override,
1371 .ident = "HP nx6115 laptop",
1373 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1374 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1378 .callback = dmi_ignore_irq0_timer_override,
1379 .ident = "HP NX6125 laptop",
1381 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1382 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1386 .callback = dmi_ignore_irq0_timer_override,
1387 .ident = "HP NX6325 laptop",
1389 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1390 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1394 .callback = dmi_ignore_irq0_timer_override,
1395 .ident = "HP 6715b laptop",
1397 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1398 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1402 .callback = dmi_ignore_irq0_timer_override,
1403 .ident = "FUJITSU SIEMENS",
1405 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1406 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1413 * acpi_boot_table_init() and acpi_boot_init()
1414 * called from setup_arch(), always.
1415 * 1. checksums all tables
1416 * 2. enumerates lapics
1417 * 3. enumerates io-apics
1419 * acpi_table_init() is separate to allow reading SRAT without
1420 * other side effects.
1422 * side effects of acpi_boot_init:
1423 * acpi_lapic = 1 if LAPIC found
1424 * acpi_ioapic = 1 if IOAPIC found
1425 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1426 * if acpi_blacklisted() acpi_disabled = 1;
1427 * acpi_irq_model=...
1431 void __init acpi_boot_table_init(void)
1433 dmi_check_system(acpi_dmi_table);
1436 * If acpi_disabled, bail out
1442 * Initialize the ACPI boot-time table parser.
1444 if (acpi_table_init()) {
1449 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1452 * blacklist may disable ACPI entirely
1454 if (acpi_blacklisted()) {
1456 printk(KERN_WARNING PREFIX "acpi=force override\n");
1458 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1465 int __init early_acpi_boot_init(void)
1468 * If acpi_disabled, bail out
1474 * Process the Multiple APIC Description Table (MADT), if present
1476 early_acpi_process_madt();
1481 int __init acpi_boot_init(void)
1483 /* those are executed after early-quirks are executed */
1484 dmi_check_system(acpi_dmi_table_late);
1487 * If acpi_disabled, bail out
1492 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1495 * set sci_int and PM timer address
1497 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1500 * Process the Multiple APIC Description Table (MADT), if present
1502 acpi_process_madt();
1504 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1507 x86_init.pci.init = pci_acpi_init;
1512 static int __init parse_acpi(char *arg)
1517 /* "acpi=off" disables both ACPI table parsing and interpreter */
1518 if (strcmp(arg, "off") == 0) {
1521 /* acpi=force to over-ride black-list */
1522 else if (strcmp(arg, "force") == 0) {
1526 /* acpi=strict disables out-of-spec workarounds */
1527 else if (strcmp(arg, "strict") == 0) {
1530 /* acpi=rsdt use RSDT instead of XSDT */
1531 else if (strcmp(arg, "rsdt") == 0) {
1532 acpi_gbl_do_not_use_xsdt = TRUE;
1534 /* "acpi=noirq" disables ACPI interrupt routing */
1535 else if (strcmp(arg, "noirq") == 0) {
1538 /* "acpi=copy_dsdt" copys DSDT */
1539 else if (strcmp(arg, "copy_dsdt") == 0) {
1540 acpi_gbl_copy_dsdt_locally = 1;
1542 /* "acpi=nocmcff" disables FF mode for corrected errors */
1543 else if (strcmp(arg, "nocmcff") == 0) {
1544 acpi_disable_cmcff = 1;
1546 /* Core will printk when we return error. */
1551 early_param("acpi", parse_acpi);
1553 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1554 static int __init parse_pci(char *arg)
1556 if (arg && strcmp(arg, "noacpi") == 0)
1560 early_param("pci", parse_pci);
1562 int __init acpi_mps_check(void)
1564 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1565 /* mptable code is not built-in*/
1566 if (acpi_disabled || acpi_noirq) {
1567 printk(KERN_WARNING "MPS support code is not built-in.\n"
1568 "Using acpi=off or acpi=noirq or pci=noacpi "
1569 "may have problem\n");
1576 #ifdef CONFIG_X86_IO_APIC
1577 static int __init parse_acpi_skip_timer_override(char *arg)
1579 acpi_skip_timer_override = 1;
1582 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1584 static int __init parse_acpi_use_timer_override(char *arg)
1586 acpi_use_timer_override = 1;
1589 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1590 #endif /* CONFIG_X86_IO_APIC */
1592 static int __init setup_acpi_sci(char *s)
1596 if (!strcmp(s, "edge"))
1597 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1598 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1599 else if (!strcmp(s, "level"))
1600 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1601 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1602 else if (!strcmp(s, "high"))
1603 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1604 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1605 else if (!strcmp(s, "low"))
1606 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1607 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1612 early_param("acpi_sci", setup_acpi_sci);
1614 int __acpi_acquire_global_lock(unsigned int *lock)
1616 unsigned int old, new, val;
1619 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1620 val = cmpxchg(lock, old, new);
1621 } while (unlikely (val != old));
1622 return (new < 3) ? -1 : 0;
1625 int __acpi_release_global_lock(unsigned int *lock)
1627 unsigned int old, new, val;
1631 val = cmpxchg(lock, old, new);
1632 } while (unlikely (val != old));
1636 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1638 e820_add_region(addr, size, E820_ACPI);