2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
26 #include <linux/init.h>
27 #include <linux/acpi.h>
28 #include <linux/acpi_pmtmr.h>
29 #include <linux/efi.h>
30 #include <linux/cpumask.h>
31 #include <linux/module.h>
32 #include <linux/dmi.h>
33 #include <linux/irq.h>
34 #include <linux/slab.h>
35 #include <linux/bootmem.h>
36 #include <linux/ioport.h>
37 #include <linux/pci.h>
39 #include <asm/pci_x86.h>
40 #include <asm/pgtable.h>
41 #include <asm/io_apic.h>
44 #include <asm/mpspec.h>
47 static int __initdata acpi_force = 0;
50 EXPORT_SYMBOL(acpi_disabled);
53 # include <asm/proto.h>
54 # include <asm/numa_64.h>
57 #define BAD_MADT_ENTRY(entry, end) ( \
58 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
59 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
61 #define PREFIX "ACPI: "
63 int acpi_noirq; /* skip ACPI IRQ initialization */
64 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
65 EXPORT_SYMBOL(acpi_pci_disabled);
71 u8 acpi_sci_flags __initdata;
72 int acpi_sci_override_gsi __initdata;
73 int acpi_skip_timer_override __initdata;
74 int acpi_use_timer_override __initdata;
75 int acpi_fix_pin2_polarity __initdata;
77 #ifdef CONFIG_X86_LOCAL_APIC
78 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
81 #ifndef __HAVE_ARCH_CMPXCHG
82 #warning ACPI uses CMPXCHG, i486 and later hardware
85 /* --------------------------------------------------------------------------
86 Boot-time Configuration
87 -------------------------------------------------------------------------- */
90 * The default interrupt routing model is PIC (8259). This gets
91 * overridden if IOAPICs are enumerated (below).
93 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
97 * ISA irqs by default are the first 16 gsis but can be
98 * any gsi as specified by an interrupt source override.
100 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
101 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
104 static unsigned int gsi_to_irq(unsigned int gsi)
106 unsigned int irq = gsi + NR_IRQS_LEGACY;
109 for (i = 0; i < NR_IRQS_LEGACY; i++) {
110 if (isa_irq_to_gsi[i] == gsi) {
115 /* Provide an identity mapping of gsi == irq
116 * except on truly weird platforms that have
117 * non isa irqs in the first 16 gsis.
119 if (gsi >= NR_IRQS_LEGACY)
127 static u32 irq_to_gsi(int irq)
131 if (irq < NR_IRQS_LEGACY)
132 gsi = isa_irq_to_gsi[irq];
133 else if (irq < gsi_top)
135 else if (irq < (gsi_top + NR_IRQS_LEGACY))
144 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
145 * to map the target physical address. The problem is that set_fixmap()
146 * provides a single page, and it is possible that the page is not
148 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
149 * i.e. until the next __va_range() call.
151 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
152 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
153 * count idx down while incrementing the phys address.
155 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
161 return early_ioremap(phys, size);
163 void __init __acpi_unmap_table(char *map, unsigned long size)
168 early_iounmap(map, size);
171 #ifdef CONFIG_X86_LOCAL_APIC
172 static int __init acpi_parse_madt(struct acpi_table_header *table)
174 struct acpi_table_madt *madt = NULL;
179 madt = (struct acpi_table_madt *)table;
181 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
186 acpi_lapic_addr = (u64) madt->address;
188 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
192 default_acpi_madt_oem_check(madt->header.oem_id,
193 madt->header.oem_table_id);
198 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
200 unsigned int ver = 0;
202 if (id >= (MAX_LOCAL_APIC-1)) {
203 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
212 if (boot_cpu_physical_apicid != -1U)
213 ver = apic_version[boot_cpu_physical_apicid];
215 generic_processor_info(id, ver);
219 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
221 struct acpi_madt_local_x2apic *processor = NULL;
225 processor = (struct acpi_madt_local_x2apic *)header;
227 if (BAD_MADT_ENTRY(processor, end))
230 acpi_table_print_madt_entry(header);
232 apic_id = processor->local_apic_id;
233 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
234 #ifdef CONFIG_X86_X2APIC
236 * We need to register disabled CPU as well to permit
237 * counting disabled CPUs. This allows us to size
238 * cpus_possible_map more accurately, to permit
239 * to not preallocating memory for all NR_CPUS
240 * when we use CPU hotplug.
242 if (!apic->apic_id_valid(apic_id) && enabled)
243 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
245 acpi_register_lapic(apic_id, enabled);
247 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
254 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
256 struct acpi_madt_local_apic *processor = NULL;
258 processor = (struct acpi_madt_local_apic *)header;
260 if (BAD_MADT_ENTRY(processor, end))
263 acpi_table_print_madt_entry(header);
266 * We need to register disabled CPU as well to permit
267 * counting disabled CPUs. This allows us to size
268 * cpus_possible_map more accurately, to permit
269 * to not preallocating memory for all NR_CPUS
270 * when we use CPU hotplug.
272 acpi_register_lapic(processor->id, /* APIC ID */
273 processor->lapic_flags & ACPI_MADT_ENABLED);
279 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
281 struct acpi_madt_local_sapic *processor = NULL;
283 processor = (struct acpi_madt_local_sapic *)header;
285 if (BAD_MADT_ENTRY(processor, end))
288 acpi_table_print_madt_entry(header);
290 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
291 processor->lapic_flags & ACPI_MADT_ENABLED);
297 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
298 const unsigned long end)
300 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
302 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
304 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
307 acpi_lapic_addr = lapic_addr_ovr->address;
313 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
314 const unsigned long end)
316 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
318 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
320 if (BAD_MADT_ENTRY(x2apic_nmi, end))
323 acpi_table_print_madt_entry(header);
325 if (x2apic_nmi->lint != 1)
326 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
332 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
334 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
336 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
338 if (BAD_MADT_ENTRY(lapic_nmi, end))
341 acpi_table_print_madt_entry(header);
343 if (lapic_nmi->lint != 1)
344 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
349 #endif /*CONFIG_X86_LOCAL_APIC */
351 #ifdef CONFIG_X86_IO_APIC
354 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
356 struct acpi_madt_io_apic *ioapic = NULL;
358 ioapic = (struct acpi_madt_io_apic *)header;
360 if (BAD_MADT_ENTRY(ioapic, end))
363 acpi_table_print_madt_entry(header);
365 mp_register_ioapic(ioapic->id,
366 ioapic->address, ioapic->global_irq_base);
372 * Parse Interrupt Source Override for the ACPI SCI
374 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
376 if (trigger == 0) /* compatible SCI trigger is level */
379 if (polarity == 0) /* compatible SCI polarity is low */
382 /* Command-line over-ride via acpi_sci= */
383 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
384 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
386 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
387 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
390 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
391 * If GSI is < 16, this will update its flags,
392 * else it will create a new mp_irqs[] entry.
394 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
397 * stash over-ride to indicate we've been here
398 * and for later update of acpi_gbl_FADT
400 acpi_sci_override_gsi = gsi;
405 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
406 const unsigned long end)
408 struct acpi_madt_interrupt_override *intsrc = NULL;
410 intsrc = (struct acpi_madt_interrupt_override *)header;
412 if (BAD_MADT_ENTRY(intsrc, end))
415 acpi_table_print_madt_entry(header);
417 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
418 acpi_sci_ioapic_setup(intsrc->source_irq,
419 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
420 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
425 if (intsrc->source_irq == 0) {
426 if (acpi_skip_timer_override) {
427 printk(PREFIX "BIOS IRQ0 override ignored.\n");
431 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
432 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
433 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
434 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
438 mp_override_legacy_irq(intsrc->source_irq,
439 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
440 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
447 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
449 struct acpi_madt_nmi_source *nmi_src = NULL;
451 nmi_src = (struct acpi_madt_nmi_source *)header;
453 if (BAD_MADT_ENTRY(nmi_src, end))
456 acpi_table_print_madt_entry(header);
458 /* TBD: Support nimsrc entries? */
463 #endif /* CONFIG_X86_IO_APIC */
466 * acpi_pic_sci_set_trigger()
468 * use ELCR to set PIC-mode trigger type for SCI
470 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
471 * it may require Edge Trigger -- use "acpi_sci=edge"
473 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
474 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
475 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
476 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
479 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
481 unsigned int mask = 1 << irq;
482 unsigned int old, new;
484 /* Real old ELCR mask */
485 old = inb(0x4d0) | (inb(0x4d1) << 8);
488 * If we use ACPI to set PCI IRQs, then we should clear ELCR
489 * since we will set it correctly as we enable the PCI irq
492 new = acpi_noirq ? old : 0;
495 * Update SCI information in the ELCR, it isn't in the PCI
499 case 1: /* Edge - clear */
502 case 3: /* Level - set */
510 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
512 outb(new >> 8, 0x4d1);
515 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
517 *irq = gsi_to_irq(gsi);
519 #ifdef CONFIG_X86_IO_APIC
520 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
521 setup_IO_APIC_irq_extra(gsi);
526 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
528 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
532 *gsi = irq_to_gsi(isa_irq);
536 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
537 int trigger, int polarity)
541 * Make sure all (legacy) PCI IRQs are set as level-triggered.
543 if (trigger == ACPI_LEVEL_SENSITIVE)
544 eisa_set_level_irq(gsi);
550 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
551 int trigger, int polarity)
553 #ifdef CONFIG_X86_IO_APIC
554 gsi = mp_register_gsi(dev, gsi, trigger, polarity);
560 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
561 int trigger, int polarity) = acpi_register_gsi_pic;
564 * success: return IRQ number (>=0)
565 * failure: return < 0
567 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
570 unsigned int plat_gsi = gsi;
572 plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity);
573 irq = gsi_to_irq(plat_gsi);
577 EXPORT_SYMBOL_GPL(acpi_register_gsi);
579 void acpi_unregister_gsi(u32 gsi)
582 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
584 void __init acpi_set_irq_model_pic(void)
586 acpi_irq_model = ACPI_IRQ_MODEL_PIC;
587 __acpi_register_gsi = acpi_register_gsi_pic;
591 void __init acpi_set_irq_model_ioapic(void)
593 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
594 __acpi_register_gsi = acpi_register_gsi_ioapic;
599 * ACPI based hotplug support for CPU
601 #ifdef CONFIG_ACPI_HOTPLUG_CPU
602 #include <acpi/processor.h>
604 static void __cpuinit acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
606 #ifdef CONFIG_ACPI_NUMA
609 nid = acpi_get_node(handle);
610 if (nid == -1 || !node_online(nid))
612 set_apicid_to_node(physid, nid);
613 numa_set_node(cpu, nid);
617 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
619 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
620 union acpi_object *obj;
621 struct acpi_madt_local_apic *lapic;
622 cpumask_var_t tmp_map, new_map;
625 int retval = -ENOMEM;
627 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
630 if (!buffer.length || !buffer.pointer)
633 obj = buffer.pointer;
634 if (obj->type != ACPI_TYPE_BUFFER ||
635 obj->buffer.length < sizeof(*lapic)) {
636 kfree(buffer.pointer);
640 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
642 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
643 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
644 kfree(buffer.pointer);
650 kfree(buffer.pointer);
651 buffer.length = ACPI_ALLOCATE_BUFFER;
652 buffer.pointer = NULL;
655 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
658 if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
661 cpumask_copy(tmp_map, cpu_present_mask);
662 acpi_register_lapic(physid, ACPI_MADT_ENABLED);
665 * If acpi_register_lapic successfully generates a new logical cpu
666 * number, then the following will get us exactly what was mapped
668 cpumask_andnot(new_map, cpu_present_mask, tmp_map);
669 if (cpumask_empty(new_map)) {
670 printk ("Unable to map lapic to logical cpu number\n");
675 acpi_processor_set_pdc(handle);
677 cpu = cpumask_first(new_map);
678 acpi_map_cpu2node(handle, cpu, physid);
684 free_cpumask_var(new_map);
686 free_cpumask_var(tmp_map);
691 /* wrapper to silence section mismatch warning */
692 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
694 return _acpi_map_lsapic(handle, pcpu);
696 EXPORT_SYMBOL(acpi_map_lsapic);
698 int acpi_unmap_lsapic(int cpu)
700 #ifdef CONFIG_ACPI_NUMA
701 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
702 numa_clear_node(cpu);
705 per_cpu(x86_cpu_to_apicid, cpu) = -1;
706 set_cpu_present(cpu, false);
712 EXPORT_SYMBOL(acpi_unmap_lsapic);
713 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
715 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
721 EXPORT_SYMBOL(acpi_register_ioapic);
723 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
729 EXPORT_SYMBOL(acpi_unregister_ioapic);
731 static int __init acpi_parse_sbf(struct acpi_table_header *table)
733 struct acpi_table_boot *sb;
735 sb = (struct acpi_table_boot *)table;
737 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
741 sbf_port = sb->cmos_index; /* Save CMOS port */
746 #ifdef CONFIG_HPET_TIMER
747 #include <asm/hpet.h>
749 static struct __initdata resource *hpet_res;
751 static int __init acpi_parse_hpet(struct acpi_table_header *table)
753 struct acpi_table_hpet *hpet_tbl;
755 hpet_tbl = (struct acpi_table_hpet *)table;
757 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
761 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
762 printk(KERN_WARNING PREFIX "HPET timers must be located in "
767 hpet_address = hpet_tbl->address.address;
768 hpet_blockid = hpet_tbl->sequence;
771 * Some broken BIOSes advertise HPET at 0x0. We really do not
772 * want to allocate a resource there.
775 printk(KERN_WARNING PREFIX
776 "HPET id: %#x base: %#lx is invalid\n",
777 hpet_tbl->id, hpet_address);
782 * Some even more broken BIOSes advertise HPET at
783 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
786 if (hpet_address == 0xfed0000000000000UL) {
787 if (!hpet_force_user) {
788 printk(KERN_WARNING PREFIX "HPET id: %#x "
789 "base: 0xfed0000000000000 is bogus\n "
790 "try hpet=force on the kernel command line to "
791 "fix it up to 0xfed00000.\n", hpet_tbl->id);
795 printk(KERN_WARNING PREFIX
796 "HPET id: %#x base: 0xfed0000000000000 fixed up "
797 "to 0xfed00000.\n", hpet_tbl->id);
801 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
802 hpet_tbl->id, hpet_address);
805 * Allocate and initialize the HPET firmware resource for adding into
806 * the resource tree during the lateinit timeframe.
808 #define HPET_RESOURCE_NAME_SIZE 9
809 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
811 hpet_res->name = (void *)&hpet_res[1];
812 hpet_res->flags = IORESOURCE_MEM;
813 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
816 hpet_res->start = hpet_address;
817 hpet_res->end = hpet_address + (1 * 1024) - 1;
823 * hpet_insert_resource inserts the HPET resources used into the resource
826 static __init int hpet_insert_resource(void)
831 return insert_resource(&iomem_resource, hpet_res);
834 late_initcall(hpet_insert_resource);
837 #define acpi_parse_hpet NULL
840 static int __init acpi_parse_fadt(struct acpi_table_header *table)
843 #ifdef CONFIG_X86_PM_TIMER
844 /* detect the location of the ACPI PM Timer */
845 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
847 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
848 ACPI_ADR_SPACE_SYSTEM_IO)
851 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
853 * "X" fields are optional extensions to the original V1.0
854 * fields, so we must selectively expand V1.0 fields if the
855 * corresponding X field is zero.
858 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
861 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
864 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
870 #ifdef CONFIG_X86_LOCAL_APIC
872 * Parse LAPIC entries in MADT
873 * returns 0 on success, < 0 on error
876 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
884 * Note that the LAPIC address is obtained from the MADT (32-bit value)
885 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
889 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
890 acpi_parse_lapic_addr_ovr, 0);
892 printk(KERN_ERR PREFIX
893 "Error parsing LAPIC address override entry\n");
897 register_lapic_address(acpi_lapic_addr);
902 static int __init acpi_parse_madt_lapic_entries(void)
911 * Note that the LAPIC address is obtained from the MADT (32-bit value)
912 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
916 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
917 acpi_parse_lapic_addr_ovr, 0);
919 printk(KERN_ERR PREFIX
920 "Error parsing LAPIC address override entry\n");
924 register_lapic_address(acpi_lapic_addr);
926 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
927 acpi_parse_sapic, MAX_LOCAL_APIC);
930 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
931 acpi_parse_x2apic, MAX_LOCAL_APIC);
932 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
933 acpi_parse_lapic, MAX_LOCAL_APIC);
935 if (!count && !x2count) {
936 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
937 /* TBD: Cleanup to allow fallback to MPS */
939 } else if (count < 0 || x2count < 0) {
940 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
941 /* TBD: Cleanup to allow fallback to MPS */
946 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
947 acpi_parse_x2apic_nmi, 0);
949 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
950 if (count < 0 || x2count < 0) {
951 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
952 /* TBD: Cleanup to allow fallback to MPS */
957 #endif /* CONFIG_X86_LOCAL_APIC */
959 #ifdef CONFIG_X86_IO_APIC
962 #ifdef CONFIG_X86_ES7000
963 extern int es7000_plat;
966 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
970 struct mpc_intsrc mp_irq;
973 * Convert 'gsi' to 'ioapic.pin'.
975 ioapic = mp_find_ioapic(gsi);
978 pin = mp_find_ioapic_pin(ioapic, gsi);
981 * TBD: This check is for faulty timer entries, where the override
982 * erroneously sets the trigger to level, resulting in a HUGE
983 * increase of timer interrupts!
985 if ((bus_irq == 0) && (trigger == 3))
988 mp_irq.type = MP_INTSRC;
989 mp_irq.irqtype = mp_INT;
990 mp_irq.irqflag = (trigger << 2) | polarity;
991 mp_irq.srcbus = MP_ISA_BUS;
992 mp_irq.srcbusirq = bus_irq; /* IRQ */
993 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
994 mp_irq.dstirq = pin; /* INTIN# */
996 mp_save_irq(&mp_irq);
998 isa_irq_to_gsi[bus_irq] = gsi;
1001 void __init mp_config_acpi_legacy_irqs(void)
1004 struct mpc_intsrc mp_irq;
1008 * Fabricate the legacy ISA bus (bus #31).
1010 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1012 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1013 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1015 #ifdef CONFIG_X86_ES7000
1017 * Older generations of ES7000 have no legacy identity mappings
1019 if (es7000_plat == 1)
1024 * Use the default configuration for the IRQs 0-15. Unless
1025 * overridden by (MADT) interrupt source override entries.
1027 for (i = 0; i < 16; i++) {
1029 unsigned int dstapic;
1033 /* Locate the gsi that irq i maps to. */
1034 if (acpi_isa_irq_to_gsi(i, &gsi))
1038 * Locate the IOAPIC that manages the ISA IRQ.
1040 ioapic = mp_find_ioapic(gsi);
1043 pin = mp_find_ioapic_pin(ioapic, gsi);
1044 dstapic = mpc_ioapic_id(ioapic);
1046 for (idx = 0; idx < mp_irq_entries; idx++) {
1047 struct mpc_intsrc *irq = mp_irqs + idx;
1049 /* Do we already have a mapping for this ISA IRQ? */
1050 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1053 /* Do we already have a mapping for this IOAPIC pin */
1054 if (irq->dstapic == dstapic && irq->dstirq == pin)
1058 if (idx != mp_irq_entries) {
1059 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1060 continue; /* IRQ already used */
1063 mp_irq.type = MP_INTSRC;
1064 mp_irq.irqflag = 0; /* Conforming */
1065 mp_irq.srcbus = MP_ISA_BUS;
1066 mp_irq.dstapic = dstapic;
1067 mp_irq.irqtype = mp_INT;
1068 mp_irq.srcbusirq = i; /* Identity mapped */
1069 mp_irq.dstirq = pin;
1071 mp_save_irq(&mp_irq);
1075 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1078 #ifdef CONFIG_X86_MPPARSE
1079 struct mpc_intsrc mp_irq;
1080 struct pci_dev *pdev;
1081 unsigned char number;
1090 if (dev->bus != &pci_bus_type)
1093 pdev = to_pci_dev(dev);
1094 number = pdev->bus->number;
1095 devfn = pdev->devfn;
1097 /* print the entry should happen on mptable identically */
1098 mp_irq.type = MP_INTSRC;
1099 mp_irq.irqtype = mp_INT;
1100 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1101 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1102 mp_irq.srcbus = number;
1103 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1104 ioapic = mp_find_ioapic(gsi);
1105 mp_irq.dstapic = mpc_ioapic_id(ioapic);
1106 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1108 mp_save_irq(&mp_irq);
1113 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1117 struct io_apic_irq_attr irq_attr;
1119 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1122 /* Don't set up the ACPI SCI because it's already set up */
1123 if (acpi_gbl_FADT.sci_interrupt == gsi)
1126 ioapic = mp_find_ioapic(gsi);
1128 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1132 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1134 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1135 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1136 "%d-%d\n", mpc_ioapic_id(ioapic),
1141 if (enable_update_mptable)
1142 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1144 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1145 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1146 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1147 io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
1153 * Parse IOAPIC related entries in MADT
1154 * returns 0 on success, < 0 on error
1156 static int __init acpi_parse_madt_ioapic_entries(void)
1161 * ACPI interpreter is required to complete interrupt setup,
1162 * so if it is off, don't enumerate the io-apics with ACPI.
1163 * If MPS is present, it will handle them,
1164 * otherwise the system will stay in PIC mode
1166 if (acpi_disabled || acpi_noirq)
1173 * if "noapic" boot option, don't look for IO-APICs
1175 if (skip_ioapic_setup) {
1176 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1177 "due to 'noapic' option.\n");
1182 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1185 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1187 } else if (count < 0) {
1188 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1193 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1196 printk(KERN_ERR PREFIX
1197 "Error parsing interrupt source overrides entry\n");
1198 /* TBD: Cleanup to allow fallback to MPS */
1203 * If BIOS did not supply an INT_SRC_OVR for the SCI
1204 * pretend we got one so we can set the SCI flags.
1206 if (!acpi_sci_override_gsi)
1207 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1208 acpi_gbl_FADT.sci_interrupt);
1210 /* Fill in identity legacy mappings where no override */
1211 mp_config_acpi_legacy_irqs();
1214 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1217 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1218 /* TBD: Cleanup to allow fallback to MPS */
1225 static inline int acpi_parse_madt_ioapic_entries(void)
1229 #endif /* !CONFIG_X86_IO_APIC */
1231 static void __init early_acpi_process_madt(void)
1233 #ifdef CONFIG_X86_LOCAL_APIC
1236 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1239 * Parse MADT LAPIC entries
1241 error = early_acpi_parse_madt_lapic_addr_ovr();
1244 smp_found_config = 1;
1246 if (error == -EINVAL) {
1248 * Dell Precision Workstation 410, 610 come here.
1250 printk(KERN_ERR PREFIX
1251 "Invalid BIOS MADT, disabling ACPI\n");
1258 static void __init acpi_process_madt(void)
1260 #ifdef CONFIG_X86_LOCAL_APIC
1263 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1266 * Parse MADT LAPIC entries
1268 error = acpi_parse_madt_lapic_entries();
1273 * Parse MADT IO-APIC entries
1275 error = acpi_parse_madt_ioapic_entries();
1277 acpi_set_irq_model_ioapic();
1279 smp_found_config = 1;
1282 if (error == -EINVAL) {
1284 * Dell Precision Workstation 410, 610 come here.
1286 printk(KERN_ERR PREFIX
1287 "Invalid BIOS MADT, disabling ACPI\n");
1292 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1293 * In the event an MPS table was found, forget it.
1294 * Boot with "acpi=off" to use MPS on such a system.
1296 if (smp_found_config) {
1297 printk(KERN_WARNING PREFIX
1298 "No APIC-table, disabling MPS\n");
1299 smp_found_config = 0;
1304 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1305 * processors, where MPS only supports physical.
1307 if (acpi_lapic && acpi_ioapic)
1308 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1310 else if (acpi_lapic)
1311 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1312 "configuration information\n");
1317 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1320 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1327 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1330 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1337 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1340 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1344 "Warning: DMI blacklist says broken, but acpi forced\n");
1350 * Force ignoring BIOS IRQ0 override
1352 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1354 if (!acpi_skip_timer_override) {
1355 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1357 acpi_skip_timer_override = 1;
1363 * If your system is blacklisted here, but you find that acpi=force
1364 * works for you, please contact linux-acpi@vger.kernel.org
1366 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1368 * Boxes that need ACPI disabled
1371 .callback = dmi_disable_acpi,
1372 .ident = "IBM Thinkpad",
1374 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1375 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1380 * Boxes that need ACPI PCI IRQ routing disabled
1383 .callback = disable_acpi_irq,
1384 .ident = "ASUS A7V",
1386 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1387 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1388 /* newer BIOS, Revision 1011, does work */
1389 DMI_MATCH(DMI_BIOS_VERSION,
1390 "ASUS A7V ACPI BIOS Revision 1007"),
1395 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1396 * for LPC bridge, which is needed for the PCI
1397 * interrupt links to work. DSDT fix is in bug 5966.
1398 * 2645, 2646 model numbers are shared with 600/600E/600X
1400 .callback = disable_acpi_irq,
1401 .ident = "IBM Thinkpad 600 Series 2645",
1403 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1404 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1408 .callback = disable_acpi_irq,
1409 .ident = "IBM Thinkpad 600 Series 2646",
1411 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1412 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1416 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1419 .callback = disable_acpi_pci,
1420 .ident = "ASUS PR-DLS",
1422 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1423 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1424 DMI_MATCH(DMI_BIOS_VERSION,
1425 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1426 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1430 .callback = disable_acpi_pci,
1431 .ident = "Acer TravelMate 36x Laptop",
1433 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1434 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1440 /* second table for DMI checks that should run after early-quirks */
1441 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1443 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1444 * which includes some code which overrides all temperature
1445 * trip points to 16C if the INTIN2 input of the I/O APIC
1446 * is enabled. This input is incorrectly designated the
1447 * ISA IRQ 0 via an interrupt source override even though
1448 * it is wired to the output of the master 8259A and INTIN0
1449 * is not connected at all. Force ignoring BIOS IRQ0
1450 * override in that cases.
1453 .callback = dmi_ignore_irq0_timer_override,
1454 .ident = "HP nx6115 laptop",
1456 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1457 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1461 .callback = dmi_ignore_irq0_timer_override,
1462 .ident = "HP NX6125 laptop",
1464 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1465 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1469 .callback = dmi_ignore_irq0_timer_override,
1470 .ident = "HP NX6325 laptop",
1472 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1473 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1477 .callback = dmi_ignore_irq0_timer_override,
1478 .ident = "HP 6715b laptop",
1480 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1481 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1485 .callback = dmi_ignore_irq0_timer_override,
1486 .ident = "FUJITSU SIEMENS",
1488 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1489 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1496 * acpi_boot_table_init() and acpi_boot_init()
1497 * called from setup_arch(), always.
1498 * 1. checksums all tables
1499 * 2. enumerates lapics
1500 * 3. enumerates io-apics
1502 * acpi_table_init() is separate to allow reading SRAT without
1503 * other side effects.
1505 * side effects of acpi_boot_init:
1506 * acpi_lapic = 1 if LAPIC found
1507 * acpi_ioapic = 1 if IOAPIC found
1508 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1509 * if acpi_blacklisted() acpi_disabled = 1;
1510 * acpi_irq_model=...
1514 void __init acpi_boot_table_init(void)
1516 dmi_check_system(acpi_dmi_table);
1519 * If acpi_disabled, bail out
1525 * Initialize the ACPI boot-time table parser.
1527 if (acpi_table_init()) {
1532 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1535 * blacklist may disable ACPI entirely
1537 if (acpi_blacklisted()) {
1539 printk(KERN_WARNING PREFIX "acpi=force override\n");
1541 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1548 int __init early_acpi_boot_init(void)
1551 * If acpi_disabled, bail out
1557 * Process the Multiple APIC Description Table (MADT), if present
1559 early_acpi_process_madt();
1564 int __init acpi_boot_init(void)
1566 /* those are executed after early-quirks are executed */
1567 dmi_check_system(acpi_dmi_table_late);
1570 * If acpi_disabled, bail out
1575 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1578 * set sci_int and PM timer address
1580 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1583 * Process the Multiple APIC Description Table (MADT), if present
1585 acpi_process_madt();
1587 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1590 x86_init.pci.init = pci_acpi_init;
1595 static int __init parse_acpi(char *arg)
1600 /* "acpi=off" disables both ACPI table parsing and interpreter */
1601 if (strcmp(arg, "off") == 0) {
1604 /* acpi=force to over-ride black-list */
1605 else if (strcmp(arg, "force") == 0) {
1609 /* acpi=strict disables out-of-spec workarounds */
1610 else if (strcmp(arg, "strict") == 0) {
1613 /* acpi=rsdt use RSDT instead of XSDT */
1614 else if (strcmp(arg, "rsdt") == 0) {
1615 acpi_rsdt_forced = 1;
1617 /* "acpi=noirq" disables ACPI interrupt routing */
1618 else if (strcmp(arg, "noirq") == 0) {
1621 /* "acpi=copy_dsdt" copys DSDT */
1622 else if (strcmp(arg, "copy_dsdt") == 0) {
1623 acpi_gbl_copy_dsdt_locally = 1;
1625 /* Core will printk when we return error. */
1630 early_param("acpi", parse_acpi);
1632 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1633 static int __init parse_pci(char *arg)
1635 if (arg && strcmp(arg, "noacpi") == 0)
1639 early_param("pci", parse_pci);
1641 int __init acpi_mps_check(void)
1643 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1644 /* mptable code is not built-in*/
1645 if (acpi_disabled || acpi_noirq) {
1646 printk(KERN_WARNING "MPS support code is not built-in.\n"
1647 "Using acpi=off or acpi=noirq or pci=noacpi "
1648 "may have problem\n");
1655 #ifdef CONFIG_X86_IO_APIC
1656 static int __init parse_acpi_skip_timer_override(char *arg)
1658 acpi_skip_timer_override = 1;
1661 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1663 static int __init parse_acpi_use_timer_override(char *arg)
1665 acpi_use_timer_override = 1;
1668 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1669 #endif /* CONFIG_X86_IO_APIC */
1671 static int __init setup_acpi_sci(char *s)
1675 if (!strcmp(s, "edge"))
1676 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1677 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1678 else if (!strcmp(s, "level"))
1679 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1680 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1681 else if (!strcmp(s, "high"))
1682 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1683 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1684 else if (!strcmp(s, "low"))
1685 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1686 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1691 early_param("acpi_sci", setup_acpi_sci);
1693 int __acpi_acquire_global_lock(unsigned int *lock)
1695 unsigned int old, new, val;
1698 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1699 val = cmpxchg(lock, old, new);
1700 } while (unlikely (val != old));
1701 return (new < 3) ? -1 : 0;
1704 int __acpi_release_global_lock(unsigned int *lock)
1706 unsigned int old, new, val;
1710 val = cmpxchg(lock, old, new);
1711 } while (unlikely (val != old));
1715 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1717 e820_add_region(addr, size, E820_ACPI);