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 /* --------------------------------------------------------------------------
80 Boot-time Configuration
81 -------------------------------------------------------------------------- */
84 * The default interrupt routing model is PIC (8259). This gets
85 * overridden if IOAPICs are enumerated (below).
87 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
91 * ISA irqs by default are the first 16 gsis but can be
92 * any gsi as specified by an interrupt source override.
94 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
95 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
98 #define ACPI_INVALID_GSI INT_MIN
101 * This is just a simple wrapper around early_ioremap(),
102 * with sanity checks for phys == 0 and size == 0.
104 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
110 return early_ioremap(phys, size);
113 void __init __acpi_unmap_table(char *map, unsigned long size)
118 early_iounmap(map, size);
121 #ifdef CONFIG_X86_LOCAL_APIC
122 static int __init acpi_parse_madt(struct acpi_table_header *table)
124 struct acpi_table_madt *madt = NULL;
129 madt = (struct acpi_table_madt *)table;
131 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
136 acpi_lapic_addr = (u64) madt->address;
138 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
142 default_acpi_madt_oem_check(madt->header.oem_id,
143 madt->header.oem_table_id);
149 * acpi_register_lapic - register a local apic and generates a logic cpu number
150 * @id: local apic id to register
151 * @enabled: this cpu is enabled or not
153 * Returns the logic cpu number which maps to the local apic
155 static int acpi_register_lapic(int id, u8 enabled)
157 unsigned int ver = 0;
159 if (id >= MAX_LOCAL_APIC) {
160 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
169 if (boot_cpu_physical_apicid != -1U)
170 ver = apic_version[boot_cpu_physical_apicid];
172 return generic_processor_info(id, ver);
176 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
178 struct acpi_madt_local_x2apic *processor = NULL;
182 processor = (struct acpi_madt_local_x2apic *)header;
184 if (BAD_MADT_ENTRY(processor, end))
187 acpi_table_print_madt_entry(header);
189 apic_id = processor->local_apic_id;
190 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
191 #ifdef CONFIG_X86_X2APIC
193 * We need to register disabled CPU as well to permit
194 * counting disabled CPUs. This allows us to size
195 * cpus_possible_map more accurately, to permit
196 * to not preallocating memory for all NR_CPUS
197 * when we use CPU hotplug.
199 if (!apic->apic_id_valid(apic_id) && enabled)
200 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
202 acpi_register_lapic(apic_id, enabled);
204 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
211 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
213 struct acpi_madt_local_apic *processor = NULL;
215 processor = (struct acpi_madt_local_apic *)header;
217 if (BAD_MADT_ENTRY(processor, end))
220 acpi_table_print_madt_entry(header);
223 * We need to register disabled CPU as well to permit
224 * counting disabled CPUs. This allows us to size
225 * cpus_possible_map more accurately, to permit
226 * to not preallocating memory for all NR_CPUS
227 * when we use CPU hotplug.
229 acpi_register_lapic(processor->id, /* APIC ID */
230 processor->lapic_flags & ACPI_MADT_ENABLED);
236 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
238 struct acpi_madt_local_sapic *processor = NULL;
240 processor = (struct acpi_madt_local_sapic *)header;
242 if (BAD_MADT_ENTRY(processor, end))
245 acpi_table_print_madt_entry(header);
247 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
248 processor->lapic_flags & ACPI_MADT_ENABLED);
254 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
255 const unsigned long end)
257 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
259 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
261 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
264 acpi_lapic_addr = lapic_addr_ovr->address;
270 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
271 const unsigned long end)
273 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
275 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
277 if (BAD_MADT_ENTRY(x2apic_nmi, end))
280 acpi_table_print_madt_entry(header);
282 if (x2apic_nmi->lint != 1)
283 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
289 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
291 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
293 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
295 if (BAD_MADT_ENTRY(lapic_nmi, end))
298 acpi_table_print_madt_entry(header);
300 if (lapic_nmi->lint != 1)
301 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
306 #endif /*CONFIG_X86_LOCAL_APIC */
308 #ifdef CONFIG_X86_IO_APIC
311 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
316 struct mpc_intsrc mp_irq;
319 * Convert 'gsi' to 'ioapic.pin'.
321 ioapic = mp_find_ioapic(gsi);
324 pin = mp_find_ioapic_pin(ioapic, gsi);
327 * TBD: This check is for faulty timer entries, where the override
328 * erroneously sets the trigger to level, resulting in a HUGE
329 * increase of timer interrupts!
331 if ((bus_irq == 0) && (trigger == 3))
334 mp_irq.type = MP_INTSRC;
335 mp_irq.irqtype = mp_INT;
336 mp_irq.irqflag = (trigger << 2) | polarity;
337 mp_irq.srcbus = MP_ISA_BUS;
338 mp_irq.srcbusirq = bus_irq; /* IRQ */
339 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
340 mp_irq.dstirq = pin; /* INTIN# */
342 mp_save_irq(&mp_irq);
345 * Reset default identity mapping if gsi is also an legacy IRQ,
346 * otherwise there will be more than one entry with the same GSI
347 * and acpi_isa_irq_to_gsi() may give wrong result.
349 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
350 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
351 isa_irq_to_gsi[bus_irq] = gsi;
354 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
357 #ifdef CONFIG_X86_MPPARSE
358 struct mpc_intsrc mp_irq;
359 struct pci_dev *pdev;
360 unsigned char number;
367 if (!dev || !dev_is_pci(dev))
370 pdev = to_pci_dev(dev);
371 number = pdev->bus->number;
374 /* print the entry should happen on mptable identically */
375 mp_irq.type = MP_INTSRC;
376 mp_irq.irqtype = mp_INT;
377 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
378 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
379 mp_irq.srcbus = number;
380 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
381 ioapic = mp_find_ioapic(gsi);
382 mp_irq.dstapic = mpc_ioapic_id(ioapic);
383 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
385 mp_save_irq(&mp_irq);
390 static int mp_register_gsi(struct device *dev, u32 gsi, int trigger,
395 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
398 /* Don't set up the ACPI SCI because it's already set up */
399 if (acpi_gbl_FADT.sci_interrupt == gsi)
402 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
403 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
404 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
405 if (mp_set_gsi_attr(gsi, trigger, polarity, node)) {
406 pr_warn("Failed to set pin attr for GSI%d\n", gsi);
410 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC);
414 if (enable_update_mptable)
415 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
420 static void mp_unregister_gsi(u32 gsi)
424 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
427 if (acpi_gbl_FADT.sci_interrupt == gsi)
430 irq = mp_map_gsi_to_irq(gsi, 0);
435 static struct irq_domain_ops acpi_irqdomain_ops = {
436 .map = mp_irqdomain_map,
437 .unmap = mp_irqdomain_unmap,
441 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
443 struct acpi_madt_io_apic *ioapic = NULL;
444 struct ioapic_domain_cfg cfg = {
445 .type = IOAPIC_DOMAIN_DYNAMIC,
446 .ops = &acpi_irqdomain_ops,
449 ioapic = (struct acpi_madt_io_apic *)header;
451 if (BAD_MADT_ENTRY(ioapic, end))
454 acpi_table_print_madt_entry(header);
456 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
457 if (ioapic->global_irq_base < nr_legacy_irqs())
458 cfg.type = IOAPIC_DOMAIN_LEGACY;
460 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
467 * Parse Interrupt Source Override for the ACPI SCI
469 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
471 if (trigger == 0) /* compatible SCI trigger is level */
474 if (polarity == 0) /* compatible SCI polarity is low */
477 /* Command-line over-ride via acpi_sci= */
478 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
479 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
481 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
482 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
484 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
487 * stash over-ride to indicate we've been here
488 * and for later update of acpi_gbl_FADT
490 acpi_sci_override_gsi = gsi;
495 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
496 const unsigned long end)
498 struct acpi_madt_interrupt_override *intsrc = NULL;
500 intsrc = (struct acpi_madt_interrupt_override *)header;
502 if (BAD_MADT_ENTRY(intsrc, end))
505 acpi_table_print_madt_entry(header);
507 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
508 acpi_sci_ioapic_setup(intsrc->source_irq,
509 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
510 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
515 if (intsrc->source_irq == 0) {
516 if (acpi_skip_timer_override) {
517 printk(PREFIX "BIOS IRQ0 override ignored.\n");
521 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
522 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
523 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
524 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
528 mp_override_legacy_irq(intsrc->source_irq,
529 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
530 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
537 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
539 struct acpi_madt_nmi_source *nmi_src = NULL;
541 nmi_src = (struct acpi_madt_nmi_source *)header;
543 if (BAD_MADT_ENTRY(nmi_src, end))
546 acpi_table_print_madt_entry(header);
548 /* TBD: Support nimsrc entries? */
553 #endif /* CONFIG_X86_IO_APIC */
556 * acpi_pic_sci_set_trigger()
558 * use ELCR to set PIC-mode trigger type for SCI
560 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
561 * it may require Edge Trigger -- use "acpi_sci=edge"
563 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
564 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
565 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
566 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
569 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
571 unsigned int mask = 1 << irq;
572 unsigned int old, new;
574 /* Real old ELCR mask */
575 old = inb(0x4d0) | (inb(0x4d1) << 8);
578 * If we use ACPI to set PCI IRQs, then we should clear ELCR
579 * since we will set it correctly as we enable the PCI irq
582 new = acpi_noirq ? old : 0;
585 * Update SCI information in the ELCR, it isn't in the PCI
589 case 1: /* Edge - clear */
592 case 3: /* Level - set */
600 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
602 outb(new >> 8, 0x4d1);
605 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
607 int irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC | IOAPIC_MAP_CHECK);
616 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
618 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
620 if (isa_irq < nr_legacy_irqs() &&
621 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
622 *gsi = isa_irq_to_gsi[isa_irq];
629 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
630 int trigger, int polarity)
634 * Make sure all (legacy) PCI IRQs are set as level-triggered.
636 if (trigger == ACPI_LEVEL_SENSITIVE)
637 eisa_set_level_irq(gsi);
643 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
644 int trigger, int polarity)
648 #ifdef CONFIG_X86_IO_APIC
649 irq = mp_register_gsi(dev, gsi, trigger, polarity);
655 static void acpi_unregister_gsi_ioapic(u32 gsi)
657 #ifdef CONFIG_X86_IO_APIC
658 mp_unregister_gsi(gsi);
662 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
663 int trigger, int polarity) = acpi_register_gsi_pic;
664 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
666 #ifdef CONFIG_ACPI_SLEEP
667 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
669 int (*acpi_suspend_lowlevel)(void);
673 * success: return IRQ number (>=0)
674 * failure: return < 0
676 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
678 return __acpi_register_gsi(dev, gsi, trigger, polarity);
680 EXPORT_SYMBOL_GPL(acpi_register_gsi);
682 void acpi_unregister_gsi(u32 gsi)
684 if (__acpi_unregister_gsi)
685 __acpi_unregister_gsi(gsi);
687 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
689 static void __init acpi_set_irq_model_ioapic(void)
691 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
692 __acpi_register_gsi = acpi_register_gsi_ioapic;
693 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
698 * ACPI based hotplug support for CPU
700 #ifdef CONFIG_ACPI_HOTPLUG_CPU
701 #include <acpi/processor.h>
703 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
705 #ifdef CONFIG_ACPI_NUMA
708 nid = acpi_get_node(handle);
710 set_apicid_to_node(physid, nid);
711 numa_set_node(cpu, nid);
716 static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
720 cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED);
722 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
726 acpi_processor_set_pdc(handle);
727 acpi_map_cpu2node(handle, cpu, physid);
733 /* wrapper to silence section mismatch warning */
734 int __ref acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
736 return _acpi_map_lsapic(handle, physid, pcpu);
738 EXPORT_SYMBOL(acpi_map_lsapic);
740 int acpi_unmap_lsapic(int cpu)
742 #ifdef CONFIG_ACPI_NUMA
743 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
746 per_cpu(x86_cpu_to_apicid, cpu) = -1;
747 set_cpu_present(cpu, false);
753 EXPORT_SYMBOL(acpi_unmap_lsapic);
754 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
756 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
762 EXPORT_SYMBOL(acpi_register_ioapic);
764 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
770 EXPORT_SYMBOL(acpi_unregister_ioapic);
772 static int __init acpi_parse_sbf(struct acpi_table_header *table)
774 struct acpi_table_boot *sb;
776 sb = (struct acpi_table_boot *)table;
778 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
782 sbf_port = sb->cmos_index; /* Save CMOS port */
787 #ifdef CONFIG_HPET_TIMER
788 #include <asm/hpet.h>
790 static struct resource *hpet_res __initdata;
792 static int __init acpi_parse_hpet(struct acpi_table_header *table)
794 struct acpi_table_hpet *hpet_tbl;
796 hpet_tbl = (struct acpi_table_hpet *)table;
798 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
802 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
803 printk(KERN_WARNING PREFIX "HPET timers must be located in "
808 hpet_address = hpet_tbl->address.address;
809 hpet_blockid = hpet_tbl->sequence;
812 * Some broken BIOSes advertise HPET at 0x0. We really do not
813 * want to allocate a resource there.
816 printk(KERN_WARNING PREFIX
817 "HPET id: %#x base: %#lx is invalid\n",
818 hpet_tbl->id, hpet_address);
823 * Some even more broken BIOSes advertise HPET at
824 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
827 if (hpet_address == 0xfed0000000000000UL) {
828 if (!hpet_force_user) {
829 printk(KERN_WARNING PREFIX "HPET id: %#x "
830 "base: 0xfed0000000000000 is bogus\n "
831 "try hpet=force on the kernel command line to "
832 "fix it up to 0xfed00000.\n", hpet_tbl->id);
836 printk(KERN_WARNING PREFIX
837 "HPET id: %#x base: 0xfed0000000000000 fixed up "
838 "to 0xfed00000.\n", hpet_tbl->id);
842 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
843 hpet_tbl->id, hpet_address);
846 * Allocate and initialize the HPET firmware resource for adding into
847 * the resource tree during the lateinit timeframe.
849 #define HPET_RESOURCE_NAME_SIZE 9
850 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
852 hpet_res->name = (void *)&hpet_res[1];
853 hpet_res->flags = IORESOURCE_MEM;
854 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
857 hpet_res->start = hpet_address;
858 hpet_res->end = hpet_address + (1 * 1024) - 1;
864 * hpet_insert_resource inserts the HPET resources used into the resource
867 static __init int hpet_insert_resource(void)
872 return insert_resource(&iomem_resource, hpet_res);
875 late_initcall(hpet_insert_resource);
878 #define acpi_parse_hpet NULL
881 static int __init acpi_parse_fadt(struct acpi_table_header *table)
884 #ifdef CONFIG_X86_PM_TIMER
885 /* detect the location of the ACPI PM Timer */
886 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
888 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
889 ACPI_ADR_SPACE_SYSTEM_IO)
892 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
894 * "X" fields are optional extensions to the original V1.0
895 * fields, so we must selectively expand V1.0 fields if the
896 * corresponding X field is zero.
899 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
902 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
905 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
911 #ifdef CONFIG_X86_LOCAL_APIC
913 * Parse LAPIC entries in MADT
914 * returns 0 on success, < 0 on error
917 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
925 * Note that the LAPIC address is obtained from the MADT (32-bit value)
926 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
929 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
930 acpi_parse_lapic_addr_ovr, 0);
932 printk(KERN_ERR PREFIX
933 "Error parsing LAPIC address override entry\n");
937 register_lapic_address(acpi_lapic_addr);
942 static int __init acpi_parse_madt_lapic_entries(void)
951 * Note that the LAPIC address is obtained from the MADT (32-bit value)
952 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
955 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
956 acpi_parse_lapic_addr_ovr, 0);
958 printk(KERN_ERR PREFIX
959 "Error parsing LAPIC address override entry\n");
963 register_lapic_address(acpi_lapic_addr);
965 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
966 acpi_parse_sapic, MAX_LOCAL_APIC);
969 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
970 acpi_parse_x2apic, MAX_LOCAL_APIC);
971 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
972 acpi_parse_lapic, MAX_LOCAL_APIC);
974 if (!count && !x2count) {
975 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
976 /* TBD: Cleanup to allow fallback to MPS */
978 } else if (count < 0 || x2count < 0) {
979 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
980 /* TBD: Cleanup to allow fallback to MPS */
984 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
985 acpi_parse_x2apic_nmi, 0);
986 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
987 acpi_parse_lapic_nmi, 0);
988 if (count < 0 || x2count < 0) {
989 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
990 /* TBD: Cleanup to allow fallback to MPS */
995 #endif /* CONFIG_X86_LOCAL_APIC */
997 #ifdef CONFIG_X86_IO_APIC
998 static void __init mp_config_acpi_legacy_irqs(void)
1001 struct mpc_intsrc mp_irq;
1005 * Fabricate the legacy ISA bus (bus #31).
1007 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1009 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1010 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1013 * Use the default configuration for the IRQs 0-15. Unless
1014 * overridden by (MADT) interrupt source override entries.
1016 for (i = 0; i < nr_legacy_irqs(); i++) {
1018 unsigned int dstapic;
1022 /* Locate the gsi that irq i maps to. */
1023 if (acpi_isa_irq_to_gsi(i, &gsi))
1027 * Locate the IOAPIC that manages the ISA IRQ.
1029 ioapic = mp_find_ioapic(gsi);
1032 pin = mp_find_ioapic_pin(ioapic, gsi);
1033 dstapic = mpc_ioapic_id(ioapic);
1035 for (idx = 0; idx < mp_irq_entries; idx++) {
1036 struct mpc_intsrc *irq = mp_irqs + idx;
1038 /* Do we already have a mapping for this ISA IRQ? */
1039 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1042 /* Do we already have a mapping for this IOAPIC pin */
1043 if (irq->dstapic == dstapic && irq->dstirq == pin)
1047 if (idx != mp_irq_entries) {
1048 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1049 continue; /* IRQ already used */
1052 mp_irq.type = MP_INTSRC;
1053 mp_irq.irqflag = 0; /* Conforming */
1054 mp_irq.srcbus = MP_ISA_BUS;
1055 mp_irq.dstapic = dstapic;
1056 mp_irq.irqtype = mp_INT;
1057 mp_irq.srcbusirq = i; /* Identity mapped */
1058 mp_irq.dstirq = pin;
1060 mp_save_irq(&mp_irq);
1065 * Parse IOAPIC related entries in MADT
1066 * returns 0 on success, < 0 on error
1068 static int __init acpi_parse_madt_ioapic_entries(void)
1073 * ACPI interpreter is required to complete interrupt setup,
1074 * so if it is off, don't enumerate the io-apics with ACPI.
1075 * If MPS is present, it will handle them,
1076 * otherwise the system will stay in PIC mode
1078 if (acpi_disabled || acpi_noirq)
1085 * if "noapic" boot option, don't look for IO-APICs
1087 if (skip_ioapic_setup) {
1088 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1089 "due to 'noapic' option.\n");
1093 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1096 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1098 } else if (count < 0) {
1099 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1103 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1104 acpi_parse_int_src_ovr, nr_irqs);
1106 printk(KERN_ERR PREFIX
1107 "Error parsing interrupt source overrides entry\n");
1108 /* TBD: Cleanup to allow fallback to MPS */
1113 * If BIOS did not supply an INT_SRC_OVR for the SCI
1114 * pretend we got one so we can set the SCI flags.
1116 if (!acpi_sci_override_gsi)
1117 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1118 acpi_gbl_FADT.sci_interrupt);
1120 /* Fill in identity legacy mappings where no override */
1121 mp_config_acpi_legacy_irqs();
1123 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1124 acpi_parse_nmi_src, nr_irqs);
1126 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1127 /* TBD: Cleanup to allow fallback to MPS */
1134 static inline int acpi_parse_madt_ioapic_entries(void)
1138 #endif /* !CONFIG_X86_IO_APIC */
1140 static void __init early_acpi_process_madt(void)
1142 #ifdef CONFIG_X86_LOCAL_APIC
1145 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1148 * Parse MADT LAPIC entries
1150 error = early_acpi_parse_madt_lapic_addr_ovr();
1153 smp_found_config = 1;
1155 if (error == -EINVAL) {
1157 * Dell Precision Workstation 410, 610 come here.
1159 printk(KERN_ERR PREFIX
1160 "Invalid BIOS MADT, disabling ACPI\n");
1167 static void __init acpi_process_madt(void)
1169 #ifdef CONFIG_X86_LOCAL_APIC
1172 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1175 * Parse MADT LAPIC entries
1177 error = acpi_parse_madt_lapic_entries();
1182 * Parse MADT IO-APIC entries
1184 error = acpi_parse_madt_ioapic_entries();
1186 acpi_set_irq_model_ioapic();
1188 smp_found_config = 1;
1191 if (error == -EINVAL) {
1193 * Dell Precision Workstation 410, 610 come here.
1195 printk(KERN_ERR PREFIX
1196 "Invalid BIOS MADT, disabling ACPI\n");
1201 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1202 * In the event an MPS table was found, forget it.
1203 * Boot with "acpi=off" to use MPS on such a system.
1205 if (smp_found_config) {
1206 printk(KERN_WARNING PREFIX
1207 "No APIC-table, disabling MPS\n");
1208 smp_found_config = 0;
1213 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1214 * processors, where MPS only supports physical.
1216 if (acpi_lapic && acpi_ioapic)
1217 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1219 else if (acpi_lapic)
1220 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1221 "configuration information\n");
1226 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1229 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1236 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1239 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1246 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1249 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1253 "Warning: DMI blacklist says broken, but acpi forced\n");
1259 * Force ignoring BIOS IRQ0 override
1261 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1263 if (!acpi_skip_timer_override) {
1264 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1266 acpi_skip_timer_override = 1;
1272 * If your system is blacklisted here, but you find that acpi=force
1273 * works for you, please contact linux-acpi@vger.kernel.org
1275 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1277 * Boxes that need ACPI disabled
1280 .callback = dmi_disable_acpi,
1281 .ident = "IBM Thinkpad",
1283 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1284 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1289 * Boxes that need ACPI PCI IRQ routing disabled
1292 .callback = disable_acpi_irq,
1293 .ident = "ASUS A7V",
1295 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1296 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1297 /* newer BIOS, Revision 1011, does work */
1298 DMI_MATCH(DMI_BIOS_VERSION,
1299 "ASUS A7V ACPI BIOS Revision 1007"),
1304 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1305 * for LPC bridge, which is needed for the PCI
1306 * interrupt links to work. DSDT fix is in bug 5966.
1307 * 2645, 2646 model numbers are shared with 600/600E/600X
1309 .callback = disable_acpi_irq,
1310 .ident = "IBM Thinkpad 600 Series 2645",
1312 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1313 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1317 .callback = disable_acpi_irq,
1318 .ident = "IBM Thinkpad 600 Series 2646",
1320 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1321 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1325 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1328 .callback = disable_acpi_pci,
1329 .ident = "ASUS PR-DLS",
1331 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1332 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1333 DMI_MATCH(DMI_BIOS_VERSION,
1334 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1335 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1339 .callback = disable_acpi_pci,
1340 .ident = "Acer TravelMate 36x Laptop",
1342 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1343 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1349 /* second table for DMI checks that should run after early-quirks */
1350 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1352 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1353 * which includes some code which overrides all temperature
1354 * trip points to 16C if the INTIN2 input of the I/O APIC
1355 * is enabled. This input is incorrectly designated the
1356 * ISA IRQ 0 via an interrupt source override even though
1357 * it is wired to the output of the master 8259A and INTIN0
1358 * is not connected at all. Force ignoring BIOS IRQ0
1359 * override in that cases.
1362 .callback = dmi_ignore_irq0_timer_override,
1363 .ident = "HP nx6115 laptop",
1365 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1366 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1370 .callback = dmi_ignore_irq0_timer_override,
1371 .ident = "HP NX6125 laptop",
1373 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1374 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1378 .callback = dmi_ignore_irq0_timer_override,
1379 .ident = "HP NX6325 laptop",
1381 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1382 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1386 .callback = dmi_ignore_irq0_timer_override,
1387 .ident = "HP 6715b laptop",
1389 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1390 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1394 .callback = dmi_ignore_irq0_timer_override,
1395 .ident = "FUJITSU SIEMENS",
1397 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1398 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1405 * acpi_boot_table_init() and acpi_boot_init()
1406 * called from setup_arch(), always.
1407 * 1. checksums all tables
1408 * 2. enumerates lapics
1409 * 3. enumerates io-apics
1411 * acpi_table_init() is separate to allow reading SRAT without
1412 * other side effects.
1414 * side effects of acpi_boot_init:
1415 * acpi_lapic = 1 if LAPIC found
1416 * acpi_ioapic = 1 if IOAPIC found
1417 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1418 * if acpi_blacklisted() acpi_disabled = 1;
1419 * acpi_irq_model=...
1423 void __init acpi_boot_table_init(void)
1425 dmi_check_system(acpi_dmi_table);
1428 * If acpi_disabled, bail out
1434 * Initialize the ACPI boot-time table parser.
1436 if (acpi_table_init()) {
1441 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1444 * blacklist may disable ACPI entirely
1446 if (acpi_blacklisted()) {
1448 printk(KERN_WARNING PREFIX "acpi=force override\n");
1450 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1457 int __init early_acpi_boot_init(void)
1460 * If acpi_disabled, bail out
1466 * Process the Multiple APIC Description Table (MADT), if present
1468 early_acpi_process_madt();
1473 int __init acpi_boot_init(void)
1475 /* those are executed after early-quirks are executed */
1476 dmi_check_system(acpi_dmi_table_late);
1479 * If acpi_disabled, bail out
1484 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1487 * set sci_int and PM timer address
1489 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1492 * Process the Multiple APIC Description Table (MADT), if present
1494 acpi_process_madt();
1496 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1499 x86_init.pci.init = pci_acpi_init;
1504 static int __init parse_acpi(char *arg)
1509 /* "acpi=off" disables both ACPI table parsing and interpreter */
1510 if (strcmp(arg, "off") == 0) {
1513 /* acpi=force to over-ride black-list */
1514 else if (strcmp(arg, "force") == 0) {
1518 /* acpi=strict disables out-of-spec workarounds */
1519 else if (strcmp(arg, "strict") == 0) {
1522 /* acpi=rsdt use RSDT instead of XSDT */
1523 else if (strcmp(arg, "rsdt") == 0) {
1524 acpi_gbl_do_not_use_xsdt = TRUE;
1526 /* "acpi=noirq" disables ACPI interrupt routing */
1527 else if (strcmp(arg, "noirq") == 0) {
1530 /* "acpi=copy_dsdt" copys DSDT */
1531 else if (strcmp(arg, "copy_dsdt") == 0) {
1532 acpi_gbl_copy_dsdt_locally = 1;
1534 /* "acpi=nocmcff" disables FF mode for corrected errors */
1535 else if (strcmp(arg, "nocmcff") == 0) {
1536 acpi_disable_cmcff = 1;
1538 /* Core will printk when we return error. */
1543 early_param("acpi", parse_acpi);
1545 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1546 static int __init parse_pci(char *arg)
1548 if (arg && strcmp(arg, "noacpi") == 0)
1552 early_param("pci", parse_pci);
1554 int __init acpi_mps_check(void)
1556 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1557 /* mptable code is not built-in*/
1558 if (acpi_disabled || acpi_noirq) {
1559 printk(KERN_WARNING "MPS support code is not built-in.\n"
1560 "Using acpi=off or acpi=noirq or pci=noacpi "
1561 "may have problem\n");
1568 #ifdef CONFIG_X86_IO_APIC
1569 static int __init parse_acpi_skip_timer_override(char *arg)
1571 acpi_skip_timer_override = 1;
1574 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1576 static int __init parse_acpi_use_timer_override(char *arg)
1578 acpi_use_timer_override = 1;
1581 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1582 #endif /* CONFIG_X86_IO_APIC */
1584 static int __init setup_acpi_sci(char *s)
1588 if (!strcmp(s, "edge"))
1589 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1590 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1591 else if (!strcmp(s, "level"))
1592 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1593 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1594 else if (!strcmp(s, "high"))
1595 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1596 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1597 else if (!strcmp(s, "low"))
1598 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1599 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1604 early_param("acpi_sci", setup_acpi_sci);
1606 int __acpi_acquire_global_lock(unsigned int *lock)
1608 unsigned int old, new, val;
1611 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1612 val = cmpxchg(lock, old, new);
1613 } while (unlikely (val != old));
1614 return (new < 3) ? -1 : 0;
1617 int __acpi_release_global_lock(unsigned int *lock)
1619 unsigned int old, new, val;
1623 val = cmpxchg(lock, old, new);
1624 } while (unlikely (val != old));
1628 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1630 e820_add_region(addr, size, E820_ACPI);