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;
223 processor = (struct acpi_madt_local_x2apic *)header;
225 if (BAD_MADT_ENTRY(processor, end))
228 acpi_table_print_madt_entry(header);
230 #ifdef CONFIG_X86_X2APIC
232 * We need to register disabled CPU as well to permit
233 * counting disabled CPUs. This allows us to size
234 * cpus_possible_map more accurately, to permit
235 * to not preallocating memory for all NR_CPUS
236 * when we use CPU hotplug.
238 acpi_register_lapic(processor->local_apic_id, /* APIC ID */
239 processor->lapic_flags & ACPI_MADT_ENABLED);
241 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
248 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
250 struct acpi_madt_local_apic *processor = NULL;
252 processor = (struct acpi_madt_local_apic *)header;
254 if (BAD_MADT_ENTRY(processor, end))
257 acpi_table_print_madt_entry(header);
260 * We need to register disabled CPU as well to permit
261 * counting disabled CPUs. This allows us to size
262 * cpus_possible_map more accurately, to permit
263 * to not preallocating memory for all NR_CPUS
264 * when we use CPU hotplug.
266 acpi_register_lapic(processor->id, /* APIC ID */
267 processor->lapic_flags & ACPI_MADT_ENABLED);
273 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
275 struct acpi_madt_local_sapic *processor = NULL;
277 processor = (struct acpi_madt_local_sapic *)header;
279 if (BAD_MADT_ENTRY(processor, end))
282 acpi_table_print_madt_entry(header);
284 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
285 processor->lapic_flags & ACPI_MADT_ENABLED);
291 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
292 const unsigned long end)
294 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
296 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
298 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
301 acpi_lapic_addr = lapic_addr_ovr->address;
307 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
308 const unsigned long end)
310 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
312 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
314 if (BAD_MADT_ENTRY(x2apic_nmi, end))
317 acpi_table_print_madt_entry(header);
319 if (x2apic_nmi->lint != 1)
320 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
326 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
328 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
330 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
332 if (BAD_MADT_ENTRY(lapic_nmi, end))
335 acpi_table_print_madt_entry(header);
337 if (lapic_nmi->lint != 1)
338 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
343 #endif /*CONFIG_X86_LOCAL_APIC */
345 #ifdef CONFIG_X86_IO_APIC
348 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
350 struct acpi_madt_io_apic *ioapic = NULL;
352 ioapic = (struct acpi_madt_io_apic *)header;
354 if (BAD_MADT_ENTRY(ioapic, end))
357 acpi_table_print_madt_entry(header);
359 mp_register_ioapic(ioapic->id,
360 ioapic->address, ioapic->global_irq_base);
366 * Parse Interrupt Source Override for the ACPI SCI
368 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
370 if (trigger == 0) /* compatible SCI trigger is level */
373 if (polarity == 0) /* compatible SCI polarity is low */
376 /* Command-line over-ride via acpi_sci= */
377 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
378 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
380 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
381 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
384 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
385 * If GSI is < 16, this will update its flags,
386 * else it will create a new mp_irqs[] entry.
388 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
391 * stash over-ride to indicate we've been here
392 * and for later update of acpi_gbl_FADT
394 acpi_sci_override_gsi = gsi;
399 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
400 const unsigned long end)
402 struct acpi_madt_interrupt_override *intsrc = NULL;
404 intsrc = (struct acpi_madt_interrupt_override *)header;
406 if (BAD_MADT_ENTRY(intsrc, end))
409 acpi_table_print_madt_entry(header);
411 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
412 acpi_sci_ioapic_setup(intsrc->source_irq,
413 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
414 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
419 if (intsrc->source_irq == 0 && intsrc->global_irq == 2) {
420 if (acpi_skip_timer_override) {
421 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
424 if (acpi_fix_pin2_polarity && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
425 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
426 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
430 mp_override_legacy_irq(intsrc->source_irq,
431 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
432 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
439 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
441 struct acpi_madt_nmi_source *nmi_src = NULL;
443 nmi_src = (struct acpi_madt_nmi_source *)header;
445 if (BAD_MADT_ENTRY(nmi_src, end))
448 acpi_table_print_madt_entry(header);
450 /* TBD: Support nimsrc entries? */
455 #endif /* CONFIG_X86_IO_APIC */
458 * acpi_pic_sci_set_trigger()
460 * use ELCR to set PIC-mode trigger type for SCI
462 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
463 * it may require Edge Trigger -- use "acpi_sci=edge"
465 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
466 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
467 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
468 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
471 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
473 unsigned int mask = 1 << irq;
474 unsigned int old, new;
476 /* Real old ELCR mask */
477 old = inb(0x4d0) | (inb(0x4d1) << 8);
480 * If we use ACPI to set PCI IRQs, then we should clear ELCR
481 * since we will set it correctly as we enable the PCI irq
484 new = acpi_noirq ? old : 0;
487 * Update SCI information in the ELCR, it isn't in the PCI
491 case 1: /* Edge - clear */
494 case 3: /* Level - set */
502 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
504 outb(new >> 8, 0x4d1);
507 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
509 *irq = gsi_to_irq(gsi);
511 #ifdef CONFIG_X86_IO_APIC
512 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
513 setup_IO_APIC_irq_extra(gsi);
518 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
520 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
524 *gsi = irq_to_gsi(isa_irq);
528 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
529 int trigger, int polarity)
533 * Make sure all (legacy) PCI IRQs are set as level-triggered.
535 if (trigger == ACPI_LEVEL_SENSITIVE)
536 eisa_set_level_irq(gsi);
542 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
543 int trigger, int polarity)
545 #ifdef CONFIG_X86_IO_APIC
546 gsi = mp_register_gsi(dev, gsi, trigger, polarity);
552 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
553 int trigger, int polarity) = acpi_register_gsi_pic;
556 * success: return IRQ number (>=0)
557 * failure: return < 0
559 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
562 unsigned int plat_gsi = gsi;
564 plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity);
565 irq = gsi_to_irq(plat_gsi);
570 void __init acpi_set_irq_model_pic(void)
572 acpi_irq_model = ACPI_IRQ_MODEL_PIC;
573 __acpi_register_gsi = acpi_register_gsi_pic;
577 void __init acpi_set_irq_model_ioapic(void)
579 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
580 __acpi_register_gsi = acpi_register_gsi_ioapic;
585 * ACPI based hotplug support for CPU
587 #ifdef CONFIG_ACPI_HOTPLUG_CPU
588 #include <acpi/processor.h>
590 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
592 #ifdef CONFIG_ACPI_NUMA
595 nid = acpi_get_node(handle);
596 if (nid == -1 || !node_online(nid))
599 apicid_to_node[physid] = nid;
600 numa_set_node(cpu, nid);
601 #else /* CONFIG_X86_32 */
602 apicid_2_node[physid] = nid;
603 cpu_to_node_map[cpu] = nid;
609 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
611 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
612 union acpi_object *obj;
613 struct acpi_madt_local_apic *lapic;
614 cpumask_var_t tmp_map, new_map;
617 int retval = -ENOMEM;
619 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
622 if (!buffer.length || !buffer.pointer)
625 obj = buffer.pointer;
626 if (obj->type != ACPI_TYPE_BUFFER ||
627 obj->buffer.length < sizeof(*lapic)) {
628 kfree(buffer.pointer);
632 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
634 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
635 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
636 kfree(buffer.pointer);
642 kfree(buffer.pointer);
643 buffer.length = ACPI_ALLOCATE_BUFFER;
644 buffer.pointer = NULL;
646 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
649 if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
652 cpumask_copy(tmp_map, cpu_present_mask);
653 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
656 * If mp_register_lapic successfully generates a new logical cpu
657 * number, then the following will get us exactly what was mapped
659 cpumask_andnot(new_map, cpu_present_mask, tmp_map);
660 if (cpumask_empty(new_map)) {
661 printk ("Unable to map lapic to logical cpu number\n");
666 acpi_processor_set_pdc(handle);
668 cpu = cpumask_first(new_map);
669 acpi_map_cpu2node(handle, cpu, physid);
675 free_cpumask_var(new_map);
677 free_cpumask_var(tmp_map);
682 /* wrapper to silence section mismatch warning */
683 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
685 return _acpi_map_lsapic(handle, pcpu);
687 EXPORT_SYMBOL(acpi_map_lsapic);
689 int acpi_unmap_lsapic(int cpu)
691 per_cpu(x86_cpu_to_apicid, cpu) = -1;
692 set_cpu_present(cpu, false);
698 EXPORT_SYMBOL(acpi_unmap_lsapic);
699 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
701 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
707 EXPORT_SYMBOL(acpi_register_ioapic);
709 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
715 EXPORT_SYMBOL(acpi_unregister_ioapic);
717 static int __init acpi_parse_sbf(struct acpi_table_header *table)
719 struct acpi_table_boot *sb;
721 sb = (struct acpi_table_boot *)table;
723 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
727 sbf_port = sb->cmos_index; /* Save CMOS port */
732 #ifdef CONFIG_HPET_TIMER
733 #include <asm/hpet.h>
735 static struct __initdata resource *hpet_res;
737 static int __init acpi_parse_hpet(struct acpi_table_header *table)
739 struct acpi_table_hpet *hpet_tbl;
741 hpet_tbl = (struct acpi_table_hpet *)table;
743 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
747 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
748 printk(KERN_WARNING PREFIX "HPET timers must be located in "
753 hpet_address = hpet_tbl->address.address;
754 hpet_blockid = hpet_tbl->sequence;
757 * Some broken BIOSes advertise HPET at 0x0. We really do not
758 * want to allocate a resource there.
761 printk(KERN_WARNING PREFIX
762 "HPET id: %#x base: %#lx is invalid\n",
763 hpet_tbl->id, hpet_address);
768 * Some even more broken BIOSes advertise HPET at
769 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
772 if (hpet_address == 0xfed0000000000000UL) {
773 if (!hpet_force_user) {
774 printk(KERN_WARNING PREFIX "HPET id: %#x "
775 "base: 0xfed0000000000000 is bogus\n "
776 "try hpet=force on the kernel command line to "
777 "fix it up to 0xfed00000.\n", hpet_tbl->id);
781 printk(KERN_WARNING PREFIX
782 "HPET id: %#x base: 0xfed0000000000000 fixed up "
783 "to 0xfed00000.\n", hpet_tbl->id);
787 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
788 hpet_tbl->id, hpet_address);
791 * Allocate and initialize the HPET firmware resource for adding into
792 * the resource tree during the lateinit timeframe.
794 #define HPET_RESOURCE_NAME_SIZE 9
795 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
797 hpet_res->name = (void *)&hpet_res[1];
798 hpet_res->flags = IORESOURCE_MEM;
799 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
802 hpet_res->start = hpet_address;
803 hpet_res->end = hpet_address + (1 * 1024) - 1;
809 * hpet_insert_resource inserts the HPET resources used into the resource
812 static __init int hpet_insert_resource(void)
817 return insert_resource(&iomem_resource, hpet_res);
820 late_initcall(hpet_insert_resource);
823 #define acpi_parse_hpet NULL
826 static int __init acpi_parse_fadt(struct acpi_table_header *table)
829 #ifdef CONFIG_X86_PM_TIMER
830 /* detect the location of the ACPI PM Timer */
831 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
833 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
834 ACPI_ADR_SPACE_SYSTEM_IO)
837 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
839 * "X" fields are optional extensions to the original V1.0
840 * fields, so we must selectively expand V1.0 fields if the
841 * corresponding X field is zero.
844 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
847 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
850 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
856 #ifdef CONFIG_X86_LOCAL_APIC
858 * Parse LAPIC entries in MADT
859 * returns 0 on success, < 0 on error
862 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
870 * Note that the LAPIC address is obtained from the MADT (32-bit value)
871 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
875 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
876 acpi_parse_lapic_addr_ovr, 0);
878 printk(KERN_ERR PREFIX
879 "Error parsing LAPIC address override entry\n");
883 register_lapic_address(acpi_lapic_addr);
888 static int __init acpi_parse_madt_lapic_entries(void)
897 * Note that the LAPIC address is obtained from the MADT (32-bit value)
898 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
902 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
903 acpi_parse_lapic_addr_ovr, 0);
905 printk(KERN_ERR PREFIX
906 "Error parsing LAPIC address override entry\n");
910 register_lapic_address(acpi_lapic_addr);
912 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
913 acpi_parse_sapic, MAX_LOCAL_APIC);
916 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
917 acpi_parse_x2apic, MAX_LOCAL_APIC);
918 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
919 acpi_parse_lapic, MAX_LOCAL_APIC);
921 if (!count && !x2count) {
922 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
923 /* TBD: Cleanup to allow fallback to MPS */
925 } else if (count < 0 || x2count < 0) {
926 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
927 /* TBD: Cleanup to allow fallback to MPS */
932 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
933 acpi_parse_x2apic_nmi, 0);
935 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
936 if (count < 0 || x2count < 0) {
937 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
938 /* TBD: Cleanup to allow fallback to MPS */
943 #endif /* CONFIG_X86_LOCAL_APIC */
945 #ifdef CONFIG_X86_IO_APIC
948 #ifdef CONFIG_X86_ES7000
949 extern int es7000_plat;
952 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
956 struct mpc_intsrc mp_irq;
959 * Convert 'gsi' to 'ioapic.pin'.
961 ioapic = mp_find_ioapic(gsi);
964 pin = mp_find_ioapic_pin(ioapic, gsi);
967 * TBD: This check is for faulty timer entries, where the override
968 * erroneously sets the trigger to level, resulting in a HUGE
969 * increase of timer interrupts!
971 if ((bus_irq == 0) && (trigger == 3))
974 mp_irq.type = MP_INTSRC;
975 mp_irq.irqtype = mp_INT;
976 mp_irq.irqflag = (trigger << 2) | polarity;
977 mp_irq.srcbus = MP_ISA_BUS;
978 mp_irq.srcbusirq = bus_irq; /* IRQ */
979 mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */
980 mp_irq.dstirq = pin; /* INTIN# */
982 mp_save_irq(&mp_irq);
984 isa_irq_to_gsi[bus_irq] = gsi;
987 void __init mp_config_acpi_legacy_irqs(void)
990 struct mpc_intsrc mp_irq;
992 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
994 * Fabricate the legacy ISA bus (bus #31).
996 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
998 set_bit(MP_ISA_BUS, mp_bus_not_pci);
999 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1001 #ifdef CONFIG_X86_ES7000
1003 * Older generations of ES7000 have no legacy identity mappings
1005 if (es7000_plat == 1)
1010 * Use the default configuration for the IRQs 0-15. Unless
1011 * overridden by (MADT) interrupt source override entries.
1013 for (i = 0; i < 16; i++) {
1015 unsigned int dstapic;
1019 /* Locate the gsi that irq i maps to. */
1020 if (acpi_isa_irq_to_gsi(i, &gsi))
1024 * Locate the IOAPIC that manages the ISA IRQ.
1026 ioapic = mp_find_ioapic(gsi);
1029 pin = mp_find_ioapic_pin(ioapic, gsi);
1030 dstapic = mp_ioapics[ioapic].apicid;
1032 for (idx = 0; idx < mp_irq_entries; idx++) {
1033 struct mpc_intsrc *irq = mp_irqs + idx;
1035 /* Do we already have a mapping for this ISA IRQ? */
1036 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1039 /* Do we already have a mapping for this IOAPIC pin */
1040 if (irq->dstapic == dstapic && irq->dstirq == pin)
1044 if (idx != mp_irq_entries) {
1045 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1046 continue; /* IRQ already used */
1049 mp_irq.type = MP_INTSRC;
1050 mp_irq.irqflag = 0; /* Conforming */
1051 mp_irq.srcbus = MP_ISA_BUS;
1052 mp_irq.dstapic = dstapic;
1053 mp_irq.irqtype = mp_INT;
1054 mp_irq.srcbusirq = i; /* Identity mapped */
1055 mp_irq.dstirq = pin;
1057 mp_save_irq(&mp_irq);
1061 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1064 #ifdef CONFIG_X86_MPPARSE
1065 struct mpc_intsrc mp_irq;
1066 struct pci_dev *pdev;
1067 unsigned char number;
1076 if (dev->bus != &pci_bus_type)
1079 pdev = to_pci_dev(dev);
1080 number = pdev->bus->number;
1081 devfn = pdev->devfn;
1083 /* print the entry should happen on mptable identically */
1084 mp_irq.type = MP_INTSRC;
1085 mp_irq.irqtype = mp_INT;
1086 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1087 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1088 mp_irq.srcbus = number;
1089 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1090 ioapic = mp_find_ioapic(gsi);
1091 mp_irq.dstapic = mp_ioapics[ioapic].apicid;
1092 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1094 mp_save_irq(&mp_irq);
1099 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1103 struct io_apic_irq_attr irq_attr;
1105 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1108 /* Don't set up the ACPI SCI because it's already set up */
1109 if (acpi_gbl_FADT.sci_interrupt == gsi)
1112 ioapic = mp_find_ioapic(gsi);
1114 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1118 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1120 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1121 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1122 "%d-%d\n", mp_ioapics[ioapic].apicid,
1127 if (enable_update_mptable)
1128 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1130 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1131 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1132 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1133 io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
1139 * Parse IOAPIC related entries in MADT
1140 * returns 0 on success, < 0 on error
1142 static int __init acpi_parse_madt_ioapic_entries(void)
1147 * ACPI interpreter is required to complete interrupt setup,
1148 * so if it is off, don't enumerate the io-apics with ACPI.
1149 * If MPS is present, it will handle them,
1150 * otherwise the system will stay in PIC mode
1152 if (acpi_disabled || acpi_noirq)
1159 * if "noapic" boot option, don't look for IO-APICs
1161 if (skip_ioapic_setup) {
1162 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1163 "due to 'noapic' option.\n");
1168 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1171 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1173 } else if (count < 0) {
1174 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1179 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1182 printk(KERN_ERR PREFIX
1183 "Error parsing interrupt source overrides entry\n");
1184 /* TBD: Cleanup to allow fallback to MPS */
1189 * If BIOS did not supply an INT_SRC_OVR for the SCI
1190 * pretend we got one so we can set the SCI flags.
1192 if (!acpi_sci_override_gsi)
1193 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1194 acpi_gbl_FADT.sci_interrupt);
1196 /* Fill in identity legacy mappings where no override */
1197 mp_config_acpi_legacy_irqs();
1200 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1203 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1204 /* TBD: Cleanup to allow fallback to MPS */
1211 static inline int acpi_parse_madt_ioapic_entries(void)
1215 #endif /* !CONFIG_X86_IO_APIC */
1217 static void __init early_acpi_process_madt(void)
1219 #ifdef CONFIG_X86_LOCAL_APIC
1222 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1225 * Parse MADT LAPIC entries
1227 error = early_acpi_parse_madt_lapic_addr_ovr();
1230 smp_found_config = 1;
1232 if (error == -EINVAL) {
1234 * Dell Precision Workstation 410, 610 come here.
1236 printk(KERN_ERR PREFIX
1237 "Invalid BIOS MADT, disabling ACPI\n");
1244 static void __init acpi_process_madt(void)
1246 #ifdef CONFIG_X86_LOCAL_APIC
1249 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1252 * Parse MADT LAPIC entries
1254 error = acpi_parse_madt_lapic_entries();
1259 * Parse MADT IO-APIC entries
1261 error = acpi_parse_madt_ioapic_entries();
1263 acpi_set_irq_model_ioapic();
1265 smp_found_config = 1;
1268 if (error == -EINVAL) {
1270 * Dell Precision Workstation 410, 610 come here.
1272 printk(KERN_ERR PREFIX
1273 "Invalid BIOS MADT, disabling ACPI\n");
1278 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1279 * In the event an MPS table was found, forget it.
1280 * Boot with "acpi=off" to use MPS on such a system.
1282 if (smp_found_config) {
1283 printk(KERN_WARNING PREFIX
1284 "No APIC-table, disabling MPS\n");
1285 smp_found_config = 0;
1290 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1291 * processors, where MPS only supports physical.
1293 if (acpi_lapic && acpi_ioapic)
1294 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1296 else if (acpi_lapic)
1297 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1298 "configuration information\n");
1303 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1306 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1313 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1316 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1323 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1326 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1330 "Warning: DMI blacklist says broken, but acpi forced\n");
1336 * Force ignoring BIOS IRQ0 pin2 override
1338 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1341 * The ati_ixp4x0_rev() early PCI quirk should have set
1342 * the acpi_skip_timer_override flag already:
1344 if (!acpi_skip_timer_override) {
1345 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1346 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1348 acpi_skip_timer_override = 1;
1354 * If your system is blacklisted here, but you find that acpi=force
1355 * works for you, please contact linux-acpi@vger.kernel.org
1357 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1359 * Boxes that need ACPI disabled
1362 .callback = dmi_disable_acpi,
1363 .ident = "IBM Thinkpad",
1365 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1366 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1371 * Boxes that need ACPI PCI IRQ routing disabled
1374 .callback = disable_acpi_irq,
1375 .ident = "ASUS A7V",
1377 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1378 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1379 /* newer BIOS, Revision 1011, does work */
1380 DMI_MATCH(DMI_BIOS_VERSION,
1381 "ASUS A7V ACPI BIOS Revision 1007"),
1386 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1387 * for LPC bridge, which is needed for the PCI
1388 * interrupt links to work. DSDT fix is in bug 5966.
1389 * 2645, 2646 model numbers are shared with 600/600E/600X
1391 .callback = disable_acpi_irq,
1392 .ident = "IBM Thinkpad 600 Series 2645",
1394 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1395 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1399 .callback = disable_acpi_irq,
1400 .ident = "IBM Thinkpad 600 Series 2646",
1402 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1403 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1407 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1410 .callback = disable_acpi_pci,
1411 .ident = "ASUS PR-DLS",
1413 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1414 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1415 DMI_MATCH(DMI_BIOS_VERSION,
1416 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1417 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1421 .callback = disable_acpi_pci,
1422 .ident = "Acer TravelMate 36x Laptop",
1424 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1425 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1431 /* second table for DMI checks that should run after early-quirks */
1432 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1434 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1435 * which includes some code which overrides all temperature
1436 * trip points to 16C if the INTIN2 input of the I/O APIC
1437 * is enabled. This input is incorrectly designated the
1438 * ISA IRQ 0 via an interrupt source override even though
1439 * it is wired to the output of the master 8259A and INTIN0
1440 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1441 * override in that cases.
1444 .callback = dmi_ignore_irq0_timer_override,
1445 .ident = "HP nx6115 laptop",
1447 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1448 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1452 .callback = dmi_ignore_irq0_timer_override,
1453 .ident = "HP NX6125 laptop",
1455 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1456 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1460 .callback = dmi_ignore_irq0_timer_override,
1461 .ident = "HP NX6325 laptop",
1463 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1464 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1468 .callback = dmi_ignore_irq0_timer_override,
1469 .ident = "HP 6715b laptop",
1471 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1472 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1479 * acpi_boot_table_init() and acpi_boot_init()
1480 * called from setup_arch(), always.
1481 * 1. checksums all tables
1482 * 2. enumerates lapics
1483 * 3. enumerates io-apics
1485 * acpi_table_init() is separate to allow reading SRAT without
1486 * other side effects.
1488 * side effects of acpi_boot_init:
1489 * acpi_lapic = 1 if LAPIC found
1490 * acpi_ioapic = 1 if IOAPIC found
1491 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1492 * if acpi_blacklisted() acpi_disabled = 1;
1493 * acpi_irq_model=...
1497 void __init acpi_boot_table_init(void)
1499 dmi_check_system(acpi_dmi_table);
1502 * If acpi_disabled, bail out
1508 * Initialize the ACPI boot-time table parser.
1510 if (acpi_table_init()) {
1515 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1518 * blacklist may disable ACPI entirely
1520 if (acpi_blacklisted()) {
1522 printk(KERN_WARNING PREFIX "acpi=force override\n");
1524 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1531 int __init early_acpi_boot_init(void)
1534 * If acpi_disabled, bail out
1540 * Process the Multiple APIC Description Table (MADT), if present
1542 early_acpi_process_madt();
1547 int __init acpi_boot_init(void)
1549 /* those are executed after early-quirks are executed */
1550 dmi_check_system(acpi_dmi_table_late);
1553 * If acpi_disabled, bail out
1558 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1561 * set sci_int and PM timer address
1563 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1566 * Process the Multiple APIC Description Table (MADT), if present
1568 acpi_process_madt();
1570 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1573 x86_init.pci.init = pci_acpi_init;
1578 static int __init parse_acpi(char *arg)
1583 /* "acpi=off" disables both ACPI table parsing and interpreter */
1584 if (strcmp(arg, "off") == 0) {
1587 /* acpi=force to over-ride black-list */
1588 else if (strcmp(arg, "force") == 0) {
1592 /* acpi=strict disables out-of-spec workarounds */
1593 else if (strcmp(arg, "strict") == 0) {
1596 /* acpi=rsdt use RSDT instead of XSDT */
1597 else if (strcmp(arg, "rsdt") == 0) {
1598 acpi_rsdt_forced = 1;
1600 /* "acpi=noirq" disables ACPI interrupt routing */
1601 else if (strcmp(arg, "noirq") == 0) {
1604 /* "acpi=copy_dsdt" copys DSDT */
1605 else if (strcmp(arg, "copy_dsdt") == 0) {
1606 acpi_gbl_copy_dsdt_locally = 1;
1608 /* Core will printk when we return error. */
1613 early_param("acpi", parse_acpi);
1615 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1616 static int __init parse_pci(char *arg)
1618 if (arg && strcmp(arg, "noacpi") == 0)
1622 early_param("pci", parse_pci);
1624 int __init acpi_mps_check(void)
1626 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1627 /* mptable code is not built-in*/
1628 if (acpi_disabled || acpi_noirq) {
1629 printk(KERN_WARNING "MPS support code is not built-in.\n"
1630 "Using acpi=off or acpi=noirq or pci=noacpi "
1631 "may have problem\n");
1638 #ifdef CONFIG_X86_IO_APIC
1639 static int __init parse_acpi_skip_timer_override(char *arg)
1641 acpi_skip_timer_override = 1;
1644 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1646 static int __init parse_acpi_use_timer_override(char *arg)
1648 acpi_use_timer_override = 1;
1651 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1652 #endif /* CONFIG_X86_IO_APIC */
1654 static int __init setup_acpi_sci(char *s)
1658 if (!strcmp(s, "edge"))
1659 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1660 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1661 else if (!strcmp(s, "level"))
1662 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1663 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1664 else if (!strcmp(s, "high"))
1665 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1666 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1667 else if (!strcmp(s, "low"))
1668 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1669 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1674 early_param("acpi_sci", setup_acpi_sci);
1676 int __acpi_acquire_global_lock(unsigned int *lock)
1678 unsigned int old, new, val;
1681 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1682 val = cmpxchg(lock, old, new);
1683 } while (unlikely (val != old));
1684 return (new < 3) ? -1 : 0;
1687 int __acpi_release_global_lock(unsigned int *lock)
1689 unsigned int old, new, val;
1693 val = cmpxchg(lock, old, new);
1694 } while (unlikely (val != old));