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)
400 return mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC);
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)
609 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
612 irq = mp_map_gsi_to_irq(gsi,
613 IOAPIC_MAP_ALLOC | IOAPIC_MAP_CHECK);
620 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
622 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
624 if (isa_irq < nr_legacy_irqs() &&
625 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
626 *gsi = isa_irq_to_gsi[isa_irq];
633 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
634 int trigger, int polarity)
638 * Make sure all (legacy) PCI IRQs are set as level-triggered.
640 if (trigger == ACPI_LEVEL_SENSITIVE)
641 eisa_set_level_irq(gsi);
647 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
648 int trigger, int polarity)
652 #ifdef CONFIG_X86_IO_APIC
653 irq = mp_register_gsi(dev, gsi, trigger, polarity);
659 static void acpi_unregister_gsi_ioapic(u32 gsi)
661 #ifdef CONFIG_X86_IO_APIC
662 mp_unregister_gsi(gsi);
666 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
667 int trigger, int polarity) = acpi_register_gsi_pic;
668 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
670 #ifdef CONFIG_ACPI_SLEEP
671 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
673 int (*acpi_suspend_lowlevel)(void);
677 * success: return IRQ number (>=0)
678 * failure: return < 0
680 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
682 return __acpi_register_gsi(dev, gsi, trigger, polarity);
684 EXPORT_SYMBOL_GPL(acpi_register_gsi);
686 void acpi_unregister_gsi(u32 gsi)
688 if (__acpi_unregister_gsi)
689 __acpi_unregister_gsi(gsi);
691 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
693 static void __init acpi_set_irq_model_ioapic(void)
695 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
696 __acpi_register_gsi = acpi_register_gsi_ioapic;
697 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
702 * ACPI based hotplug support for CPU
704 #ifdef CONFIG_ACPI_HOTPLUG_CPU
705 #include <acpi/processor.h>
707 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
709 #ifdef CONFIG_ACPI_NUMA
712 nid = acpi_get_node(handle);
714 set_apicid_to_node(physid, nid);
715 numa_set_node(cpu, nid);
720 static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
724 cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED);
726 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
730 acpi_processor_set_pdc(handle);
731 acpi_map_cpu2node(handle, cpu, physid);
737 /* wrapper to silence section mismatch warning */
738 int __ref acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
740 return _acpi_map_lsapic(handle, physid, pcpu);
742 EXPORT_SYMBOL(acpi_map_lsapic);
744 int acpi_unmap_lsapic(int cpu)
746 #ifdef CONFIG_ACPI_NUMA
747 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
750 per_cpu(x86_cpu_to_apicid, cpu) = -1;
751 set_cpu_present(cpu, false);
757 EXPORT_SYMBOL(acpi_unmap_lsapic);
758 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
760 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
766 EXPORT_SYMBOL(acpi_register_ioapic);
768 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
774 EXPORT_SYMBOL(acpi_unregister_ioapic);
776 static int __init acpi_parse_sbf(struct acpi_table_header *table)
778 struct acpi_table_boot *sb;
780 sb = (struct acpi_table_boot *)table;
782 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
786 sbf_port = sb->cmos_index; /* Save CMOS port */
791 #ifdef CONFIG_HPET_TIMER
792 #include <asm/hpet.h>
794 static struct resource *hpet_res __initdata;
796 static int __init acpi_parse_hpet(struct acpi_table_header *table)
798 struct acpi_table_hpet *hpet_tbl;
800 hpet_tbl = (struct acpi_table_hpet *)table;
802 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
806 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
807 printk(KERN_WARNING PREFIX "HPET timers must be located in "
812 hpet_address = hpet_tbl->address.address;
813 hpet_blockid = hpet_tbl->sequence;
816 * Some broken BIOSes advertise HPET at 0x0. We really do not
817 * want to allocate a resource there.
820 printk(KERN_WARNING PREFIX
821 "HPET id: %#x base: %#lx is invalid\n",
822 hpet_tbl->id, hpet_address);
827 * Some even more broken BIOSes advertise HPET at
828 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
831 if (hpet_address == 0xfed0000000000000UL) {
832 if (!hpet_force_user) {
833 printk(KERN_WARNING PREFIX "HPET id: %#x "
834 "base: 0xfed0000000000000 is bogus\n "
835 "try hpet=force on the kernel command line to "
836 "fix it up to 0xfed00000.\n", hpet_tbl->id);
840 printk(KERN_WARNING PREFIX
841 "HPET id: %#x base: 0xfed0000000000000 fixed up "
842 "to 0xfed00000.\n", hpet_tbl->id);
846 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
847 hpet_tbl->id, hpet_address);
850 * Allocate and initialize the HPET firmware resource for adding into
851 * the resource tree during the lateinit timeframe.
853 #define HPET_RESOURCE_NAME_SIZE 9
854 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
856 hpet_res->name = (void *)&hpet_res[1];
857 hpet_res->flags = IORESOURCE_MEM;
858 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
861 hpet_res->start = hpet_address;
862 hpet_res->end = hpet_address + (1 * 1024) - 1;
868 * hpet_insert_resource inserts the HPET resources used into the resource
871 static __init int hpet_insert_resource(void)
876 return insert_resource(&iomem_resource, hpet_res);
879 late_initcall(hpet_insert_resource);
882 #define acpi_parse_hpet NULL
885 static int __init acpi_parse_fadt(struct acpi_table_header *table)
888 #ifdef CONFIG_X86_PM_TIMER
889 /* detect the location of the ACPI PM Timer */
890 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
892 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
893 ACPI_ADR_SPACE_SYSTEM_IO)
896 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
898 * "X" fields are optional extensions to the original V1.0
899 * fields, so we must selectively expand V1.0 fields if the
900 * corresponding X field is zero.
903 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
906 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
909 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
915 #ifdef CONFIG_X86_LOCAL_APIC
917 * Parse LAPIC entries in MADT
918 * returns 0 on success, < 0 on error
921 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
929 * Note that the LAPIC address is obtained from the MADT (32-bit value)
930 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
933 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
934 acpi_parse_lapic_addr_ovr, 0);
936 printk(KERN_ERR PREFIX
937 "Error parsing LAPIC address override entry\n");
941 register_lapic_address(acpi_lapic_addr);
946 static int __init acpi_parse_madt_lapic_entries(void)
955 * Note that the LAPIC address is obtained from the MADT (32-bit value)
956 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
959 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
960 acpi_parse_lapic_addr_ovr, 0);
962 printk(KERN_ERR PREFIX
963 "Error parsing LAPIC address override entry\n");
967 register_lapic_address(acpi_lapic_addr);
969 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
970 acpi_parse_sapic, MAX_LOCAL_APIC);
973 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
974 acpi_parse_x2apic, MAX_LOCAL_APIC);
975 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
976 acpi_parse_lapic, MAX_LOCAL_APIC);
978 if (!count && !x2count) {
979 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
980 /* TBD: Cleanup to allow fallback to MPS */
982 } else if (count < 0 || x2count < 0) {
983 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
984 /* TBD: Cleanup to allow fallback to MPS */
988 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
989 acpi_parse_x2apic_nmi, 0);
990 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
991 acpi_parse_lapic_nmi, 0);
992 if (count < 0 || x2count < 0) {
993 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
994 /* TBD: Cleanup to allow fallback to MPS */
999 #endif /* CONFIG_X86_LOCAL_APIC */
1001 #ifdef CONFIG_X86_IO_APIC
1002 static void __init mp_config_acpi_legacy_irqs(void)
1005 struct mpc_intsrc mp_irq;
1009 * Fabricate the legacy ISA bus (bus #31).
1011 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1013 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1014 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1017 * Use the default configuration for the IRQs 0-15. Unless
1018 * overridden by (MADT) interrupt source override entries.
1020 for (i = 0; i < nr_legacy_irqs(); i++) {
1022 unsigned int dstapic;
1026 /* Locate the gsi that irq i maps to. */
1027 if (acpi_isa_irq_to_gsi(i, &gsi))
1031 * Locate the IOAPIC that manages the ISA IRQ.
1033 ioapic = mp_find_ioapic(gsi);
1036 pin = mp_find_ioapic_pin(ioapic, gsi);
1037 dstapic = mpc_ioapic_id(ioapic);
1039 for (idx = 0; idx < mp_irq_entries; idx++) {
1040 struct mpc_intsrc *irq = mp_irqs + idx;
1042 /* Do we already have a mapping for this ISA IRQ? */
1043 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1046 /* Do we already have a mapping for this IOAPIC pin */
1047 if (irq->dstapic == dstapic && irq->dstirq == pin)
1051 if (idx != mp_irq_entries) {
1052 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1053 continue; /* IRQ already used */
1056 mp_irq.type = MP_INTSRC;
1057 mp_irq.irqflag = 0; /* Conforming */
1058 mp_irq.srcbus = MP_ISA_BUS;
1059 mp_irq.dstapic = dstapic;
1060 mp_irq.irqtype = mp_INT;
1061 mp_irq.srcbusirq = i; /* Identity mapped */
1062 mp_irq.dstirq = pin;
1064 mp_save_irq(&mp_irq);
1069 * Parse IOAPIC related entries in MADT
1070 * returns 0 on success, < 0 on error
1072 static int __init acpi_parse_madt_ioapic_entries(void)
1077 * ACPI interpreter is required to complete interrupt setup,
1078 * so if it is off, don't enumerate the io-apics with ACPI.
1079 * If MPS is present, it will handle them,
1080 * otherwise the system will stay in PIC mode
1082 if (acpi_disabled || acpi_noirq)
1089 * if "noapic" boot option, don't look for IO-APICs
1091 if (skip_ioapic_setup) {
1092 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1093 "due to 'noapic' option.\n");
1097 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1100 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1102 } else if (count < 0) {
1103 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1107 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1108 acpi_parse_int_src_ovr, nr_irqs);
1110 printk(KERN_ERR PREFIX
1111 "Error parsing interrupt source overrides entry\n");
1112 /* TBD: Cleanup to allow fallback to MPS */
1117 * If BIOS did not supply an INT_SRC_OVR for the SCI
1118 * pretend we got one so we can set the SCI flags.
1120 if (!acpi_sci_override_gsi)
1121 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1122 acpi_gbl_FADT.sci_interrupt);
1124 /* Fill in identity legacy mappings where no override */
1125 mp_config_acpi_legacy_irqs();
1127 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1128 acpi_parse_nmi_src, nr_irqs);
1130 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1131 /* TBD: Cleanup to allow fallback to MPS */
1138 static inline int acpi_parse_madt_ioapic_entries(void)
1142 #endif /* !CONFIG_X86_IO_APIC */
1144 static void __init early_acpi_process_madt(void)
1146 #ifdef CONFIG_X86_LOCAL_APIC
1149 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1152 * Parse MADT LAPIC entries
1154 error = early_acpi_parse_madt_lapic_addr_ovr();
1157 smp_found_config = 1;
1159 if (error == -EINVAL) {
1161 * Dell Precision Workstation 410, 610 come here.
1163 printk(KERN_ERR PREFIX
1164 "Invalid BIOS MADT, disabling ACPI\n");
1171 static void __init acpi_process_madt(void)
1173 #ifdef CONFIG_X86_LOCAL_APIC
1176 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1179 * Parse MADT LAPIC entries
1181 error = acpi_parse_madt_lapic_entries();
1186 * Parse MADT IO-APIC entries
1188 error = acpi_parse_madt_ioapic_entries();
1190 acpi_set_irq_model_ioapic();
1192 smp_found_config = 1;
1195 if (error == -EINVAL) {
1197 * Dell Precision Workstation 410, 610 come here.
1199 printk(KERN_ERR PREFIX
1200 "Invalid BIOS MADT, disabling ACPI\n");
1205 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1206 * In the event an MPS table was found, forget it.
1207 * Boot with "acpi=off" to use MPS on such a system.
1209 if (smp_found_config) {
1210 printk(KERN_WARNING PREFIX
1211 "No APIC-table, disabling MPS\n");
1212 smp_found_config = 0;
1217 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1218 * processors, where MPS only supports physical.
1220 if (acpi_lapic && acpi_ioapic)
1221 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1223 else if (acpi_lapic)
1224 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1225 "configuration information\n");
1230 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1233 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1240 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1243 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1250 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1253 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1257 "Warning: DMI blacklist says broken, but acpi forced\n");
1263 * Force ignoring BIOS IRQ0 override
1265 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1267 if (!acpi_skip_timer_override) {
1268 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1270 acpi_skip_timer_override = 1;
1276 * If your system is blacklisted here, but you find that acpi=force
1277 * works for you, please contact linux-acpi@vger.kernel.org
1279 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1281 * Boxes that need ACPI disabled
1284 .callback = dmi_disable_acpi,
1285 .ident = "IBM Thinkpad",
1287 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1288 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1293 * Boxes that need ACPI PCI IRQ routing disabled
1296 .callback = disable_acpi_irq,
1297 .ident = "ASUS A7V",
1299 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1300 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1301 /* newer BIOS, Revision 1011, does work */
1302 DMI_MATCH(DMI_BIOS_VERSION,
1303 "ASUS A7V ACPI BIOS Revision 1007"),
1308 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1309 * for LPC bridge, which is needed for the PCI
1310 * interrupt links to work. DSDT fix is in bug 5966.
1311 * 2645, 2646 model numbers are shared with 600/600E/600X
1313 .callback = disable_acpi_irq,
1314 .ident = "IBM Thinkpad 600 Series 2645",
1316 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1317 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1321 .callback = disable_acpi_irq,
1322 .ident = "IBM Thinkpad 600 Series 2646",
1324 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1325 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1329 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1332 .callback = disable_acpi_pci,
1333 .ident = "ASUS PR-DLS",
1335 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1336 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1337 DMI_MATCH(DMI_BIOS_VERSION,
1338 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1339 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1343 .callback = disable_acpi_pci,
1344 .ident = "Acer TravelMate 36x Laptop",
1346 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1347 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1353 /* second table for DMI checks that should run after early-quirks */
1354 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1356 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1357 * which includes some code which overrides all temperature
1358 * trip points to 16C if the INTIN2 input of the I/O APIC
1359 * is enabled. This input is incorrectly designated the
1360 * ISA IRQ 0 via an interrupt source override even though
1361 * it is wired to the output of the master 8259A and INTIN0
1362 * is not connected at all. Force ignoring BIOS IRQ0
1363 * override in that cases.
1366 .callback = dmi_ignore_irq0_timer_override,
1367 .ident = "HP nx6115 laptop",
1369 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1370 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1374 .callback = dmi_ignore_irq0_timer_override,
1375 .ident = "HP NX6125 laptop",
1377 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1378 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1382 .callback = dmi_ignore_irq0_timer_override,
1383 .ident = "HP NX6325 laptop",
1385 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1386 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1390 .callback = dmi_ignore_irq0_timer_override,
1391 .ident = "HP 6715b laptop",
1393 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1394 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1398 .callback = dmi_ignore_irq0_timer_override,
1399 .ident = "FUJITSU SIEMENS",
1401 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1402 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1409 * acpi_boot_table_init() and acpi_boot_init()
1410 * called from setup_arch(), always.
1411 * 1. checksums all tables
1412 * 2. enumerates lapics
1413 * 3. enumerates io-apics
1415 * acpi_table_init() is separate to allow reading SRAT without
1416 * other side effects.
1418 * side effects of acpi_boot_init:
1419 * acpi_lapic = 1 if LAPIC found
1420 * acpi_ioapic = 1 if IOAPIC found
1421 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1422 * if acpi_blacklisted() acpi_disabled = 1;
1423 * acpi_irq_model=...
1427 void __init acpi_boot_table_init(void)
1429 dmi_check_system(acpi_dmi_table);
1432 * If acpi_disabled, bail out
1438 * Initialize the ACPI boot-time table parser.
1440 if (acpi_table_init()) {
1445 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1448 * blacklist may disable ACPI entirely
1450 if (acpi_blacklisted()) {
1452 printk(KERN_WARNING PREFIX "acpi=force override\n");
1454 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1461 int __init early_acpi_boot_init(void)
1464 * If acpi_disabled, bail out
1470 * Process the Multiple APIC Description Table (MADT), if present
1472 early_acpi_process_madt();
1477 int __init acpi_boot_init(void)
1479 /* those are executed after early-quirks are executed */
1480 dmi_check_system(acpi_dmi_table_late);
1483 * If acpi_disabled, bail out
1488 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1491 * set sci_int and PM timer address
1493 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1496 * Process the Multiple APIC Description Table (MADT), if present
1498 acpi_process_madt();
1500 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1503 x86_init.pci.init = pci_acpi_init;
1508 static int __init parse_acpi(char *arg)
1513 /* "acpi=off" disables both ACPI table parsing and interpreter */
1514 if (strcmp(arg, "off") == 0) {
1517 /* acpi=force to over-ride black-list */
1518 else if (strcmp(arg, "force") == 0) {
1522 /* acpi=strict disables out-of-spec workarounds */
1523 else if (strcmp(arg, "strict") == 0) {
1526 /* acpi=rsdt use RSDT instead of XSDT */
1527 else if (strcmp(arg, "rsdt") == 0) {
1528 acpi_gbl_do_not_use_xsdt = TRUE;
1530 /* "acpi=noirq" disables ACPI interrupt routing */
1531 else if (strcmp(arg, "noirq") == 0) {
1534 /* "acpi=copy_dsdt" copys DSDT */
1535 else if (strcmp(arg, "copy_dsdt") == 0) {
1536 acpi_gbl_copy_dsdt_locally = 1;
1538 /* "acpi=nocmcff" disables FF mode for corrected errors */
1539 else if (strcmp(arg, "nocmcff") == 0) {
1540 acpi_disable_cmcff = 1;
1542 /* Core will printk when we return error. */
1547 early_param("acpi", parse_acpi);
1549 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1550 static int __init parse_pci(char *arg)
1552 if (arg && strcmp(arg, "noacpi") == 0)
1556 early_param("pci", parse_pci);
1558 int __init acpi_mps_check(void)
1560 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1561 /* mptable code is not built-in*/
1562 if (acpi_disabled || acpi_noirq) {
1563 printk(KERN_WARNING "MPS support code is not built-in.\n"
1564 "Using acpi=off or acpi=noirq or pci=noacpi "
1565 "may have problem\n");
1572 #ifdef CONFIG_X86_IO_APIC
1573 static int __init parse_acpi_skip_timer_override(char *arg)
1575 acpi_skip_timer_override = 1;
1578 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1580 static int __init parse_acpi_use_timer_override(char *arg)
1582 acpi_use_timer_override = 1;
1585 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1586 #endif /* CONFIG_X86_IO_APIC */
1588 static int __init setup_acpi_sci(char *s)
1592 if (!strcmp(s, "edge"))
1593 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1594 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1595 else if (!strcmp(s, "level"))
1596 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1597 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1598 else if (!strcmp(s, "high"))
1599 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1600 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1601 else if (!strcmp(s, "low"))
1602 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1603 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1608 early_param("acpi_sci", setup_acpi_sci);
1610 int __acpi_acquire_global_lock(unsigned int *lock)
1612 unsigned int old, new, val;
1615 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1616 val = cmpxchg(lock, old, new);
1617 } while (unlikely (val != old));
1618 return (new < 3) ? -1 : 0;
1621 int __acpi_release_global_lock(unsigned int *lock)
1623 unsigned int old, new, val;
1627 val = cmpxchg(lock, old, new);
1628 } while (unlikely (val != old));
1632 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1634 e820_add_region(addr, size, E820_ACPI);