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);
66 int acpi_ht __initdata = 1; /* enable HT */
72 u8 acpi_sci_flags __initdata;
73 int acpi_sci_override_gsi __initdata;
74 int acpi_skip_timer_override __initdata;
75 int acpi_use_timer_override __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 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
98 * to map the target physical address. The problem is that set_fixmap()
99 * provides a single page, and it is possible that the page is not
101 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
102 * i.e. until the next __va_range() call.
104 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
105 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
106 * count idx down while incrementing the phys address.
108 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
114 return early_ioremap(phys, size);
116 void __init __acpi_unmap_table(char *map, unsigned long size)
121 early_iounmap(map, size);
124 #ifdef CONFIG_X86_LOCAL_APIC
125 static int __init acpi_parse_madt(struct acpi_table_header *table)
127 struct acpi_table_madt *madt = NULL;
132 madt = (struct acpi_table_madt *)table;
134 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
139 acpi_lapic_addr = (u64) madt->address;
141 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
145 default_acpi_madt_oem_check(madt->header.oem_id,
146 madt->header.oem_table_id);
151 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
153 unsigned int ver = 0;
160 if (boot_cpu_physical_apicid != -1U)
161 ver = apic_version[boot_cpu_physical_apicid];
163 generic_processor_info(id, ver);
167 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
169 struct acpi_madt_local_x2apic *processor = NULL;
171 processor = (struct acpi_madt_local_x2apic *)header;
173 if (BAD_MADT_ENTRY(processor, end))
176 acpi_table_print_madt_entry(header);
178 #ifdef CONFIG_X86_X2APIC
180 * We need to register disabled CPU as well to permit
181 * counting disabled CPUs. This allows us to size
182 * cpus_possible_map more accurately, to permit
183 * to not preallocating memory for all NR_CPUS
184 * when we use CPU hotplug.
186 acpi_register_lapic(processor->local_apic_id, /* APIC ID */
187 processor->lapic_flags & ACPI_MADT_ENABLED);
189 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
196 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
198 struct acpi_madt_local_apic *processor = NULL;
200 processor = (struct acpi_madt_local_apic *)header;
202 if (BAD_MADT_ENTRY(processor, end))
205 acpi_table_print_madt_entry(header);
208 * We need to register disabled CPU as well to permit
209 * counting disabled CPUs. This allows us to size
210 * cpus_possible_map more accurately, to permit
211 * to not preallocating memory for all NR_CPUS
212 * when we use CPU hotplug.
214 acpi_register_lapic(processor->id, /* APIC ID */
215 processor->lapic_flags & ACPI_MADT_ENABLED);
221 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
223 struct acpi_madt_local_sapic *processor = NULL;
225 processor = (struct acpi_madt_local_sapic *)header;
227 if (BAD_MADT_ENTRY(processor, end))
230 acpi_table_print_madt_entry(header);
232 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
233 processor->lapic_flags & ACPI_MADT_ENABLED);
239 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
240 const unsigned long end)
242 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
244 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
246 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
249 acpi_lapic_addr = lapic_addr_ovr->address;
255 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
256 const unsigned long end)
258 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
260 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
262 if (BAD_MADT_ENTRY(x2apic_nmi, end))
265 acpi_table_print_madt_entry(header);
267 if (x2apic_nmi->lint != 1)
268 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
274 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
276 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
278 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
280 if (BAD_MADT_ENTRY(lapic_nmi, end))
283 acpi_table_print_madt_entry(header);
285 if (lapic_nmi->lint != 1)
286 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
291 #endif /*CONFIG_X86_LOCAL_APIC */
293 #ifdef CONFIG_X86_IO_APIC
296 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
298 struct acpi_madt_io_apic *ioapic = NULL;
300 ioapic = (struct acpi_madt_io_apic *)header;
302 if (BAD_MADT_ENTRY(ioapic, end))
305 acpi_table_print_madt_entry(header);
307 mp_register_ioapic(ioapic->id,
308 ioapic->address, ioapic->global_irq_base);
314 * Parse Interrupt Source Override for the ACPI SCI
316 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
318 if (trigger == 0) /* compatible SCI trigger is level */
321 if (polarity == 0) /* compatible SCI polarity is low */
324 /* Command-line over-ride via acpi_sci= */
325 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
326 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
328 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
329 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
332 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
333 * If GSI is < 16, this will update its flags,
334 * else it will create a new mp_irqs[] entry.
336 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
339 * stash over-ride to indicate we've been here
340 * and for later update of acpi_gbl_FADT
342 acpi_sci_override_gsi = gsi;
347 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
348 const unsigned long end)
350 struct acpi_madt_interrupt_override *intsrc = NULL;
352 intsrc = (struct acpi_madt_interrupt_override *)header;
354 if (BAD_MADT_ENTRY(intsrc, end))
357 acpi_table_print_madt_entry(header);
359 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
360 acpi_sci_ioapic_setup(intsrc->global_irq,
361 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
362 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
366 if (acpi_skip_timer_override &&
367 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
368 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
372 mp_override_legacy_irq(intsrc->source_irq,
373 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
374 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
381 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
383 struct acpi_madt_nmi_source *nmi_src = NULL;
385 nmi_src = (struct acpi_madt_nmi_source *)header;
387 if (BAD_MADT_ENTRY(nmi_src, end))
390 acpi_table_print_madt_entry(header);
392 /* TBD: Support nimsrc entries? */
397 #endif /* CONFIG_X86_IO_APIC */
400 * acpi_pic_sci_set_trigger()
402 * use ELCR to set PIC-mode trigger type for SCI
404 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
405 * it may require Edge Trigger -- use "acpi_sci=edge"
407 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
408 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
409 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
410 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
413 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
415 unsigned int mask = 1 << irq;
416 unsigned int old, new;
418 /* Real old ELCR mask */
419 old = inb(0x4d0) | (inb(0x4d1) << 8);
422 * If we use ACPI to set PCI IRQs, then we should clear ELCR
423 * since we will set it correctly as we enable the PCI irq
426 new = acpi_noirq ? old : 0;
429 * Update SCI information in the ELCR, it isn't in the PCI
433 case 1: /* Edge - clear */
436 case 3: /* Level - set */
444 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
446 outb(new >> 8, 0x4d1);
449 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
453 #ifdef CONFIG_X86_IO_APIC
454 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
455 setup_IO_APIC_irq_extra(gsi);
462 * success: return IRQ number (>=0)
463 * failure: return < 0
465 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
468 unsigned int plat_gsi = gsi;
472 * Make sure all (legacy) PCI IRQs are set as level-triggered.
474 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
475 if (trigger == ACPI_LEVEL_SENSITIVE)
476 eisa_set_level_irq(gsi);
480 #ifdef CONFIG_X86_IO_APIC
481 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
482 plat_gsi = mp_register_gsi(dev, gsi, trigger, polarity);
491 * ACPI based hotplug support for CPU
493 #ifdef CONFIG_ACPI_HOTPLUG_CPU
494 #include <acpi/processor.h>
496 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
498 #ifdef CONFIG_ACPI_NUMA
501 nid = acpi_get_node(handle);
502 if (nid == -1 || !node_online(nid))
505 apicid_to_node[physid] = nid;
506 numa_set_node(cpu, nid);
507 #else /* CONFIG_X86_32 */
508 apicid_2_node[physid] = nid;
509 cpu_to_node_map[cpu] = nid;
515 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
517 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
518 union acpi_object *obj;
519 struct acpi_madt_local_apic *lapic;
520 cpumask_var_t tmp_map, new_map;
523 int retval = -ENOMEM;
525 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
528 if (!buffer.length || !buffer.pointer)
531 obj = buffer.pointer;
532 if (obj->type != ACPI_TYPE_BUFFER ||
533 obj->buffer.length < sizeof(*lapic)) {
534 kfree(buffer.pointer);
538 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
540 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
541 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
542 kfree(buffer.pointer);
548 kfree(buffer.pointer);
549 buffer.length = ACPI_ALLOCATE_BUFFER;
550 buffer.pointer = NULL;
552 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
555 if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
558 cpumask_copy(tmp_map, cpu_present_mask);
559 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
562 * If mp_register_lapic successfully generates a new logical cpu
563 * number, then the following will get us exactly what was mapped
565 cpumask_andnot(new_map, cpu_present_mask, tmp_map);
566 if (cpumask_empty(new_map)) {
567 printk ("Unable to map lapic to logical cpu number\n");
572 acpi_processor_set_pdc(handle);
574 cpu = cpumask_first(new_map);
575 acpi_map_cpu2node(handle, cpu, physid);
581 free_cpumask_var(new_map);
583 free_cpumask_var(tmp_map);
588 /* wrapper to silence section mismatch warning */
589 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
591 return _acpi_map_lsapic(handle, pcpu);
593 EXPORT_SYMBOL(acpi_map_lsapic);
595 int acpi_unmap_lsapic(int cpu)
597 per_cpu(x86_cpu_to_apicid, cpu) = -1;
598 set_cpu_present(cpu, false);
604 EXPORT_SYMBOL(acpi_unmap_lsapic);
605 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
607 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
613 EXPORT_SYMBOL(acpi_register_ioapic);
615 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
621 EXPORT_SYMBOL(acpi_unregister_ioapic);
623 static int __init acpi_parse_sbf(struct acpi_table_header *table)
625 struct acpi_table_boot *sb;
627 sb = (struct acpi_table_boot *)table;
629 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
633 sbf_port = sb->cmos_index; /* Save CMOS port */
638 #ifdef CONFIG_HPET_TIMER
639 #include <asm/hpet.h>
641 static struct __initdata resource *hpet_res;
643 static int __init acpi_parse_hpet(struct acpi_table_header *table)
645 struct acpi_table_hpet *hpet_tbl;
647 hpet_tbl = (struct acpi_table_hpet *)table;
649 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
653 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
654 printk(KERN_WARNING PREFIX "HPET timers must be located in "
659 hpet_address = hpet_tbl->address.address;
660 hpet_blockid = hpet_tbl->sequence;
663 * Some broken BIOSes advertise HPET at 0x0. We really do not
664 * want to allocate a resource there.
667 printk(KERN_WARNING PREFIX
668 "HPET id: %#x base: %#lx is invalid\n",
669 hpet_tbl->id, hpet_address);
674 * Some even more broken BIOSes advertise HPET at
675 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
678 if (hpet_address == 0xfed0000000000000UL) {
679 if (!hpet_force_user) {
680 printk(KERN_WARNING PREFIX "HPET id: %#x "
681 "base: 0xfed0000000000000 is bogus\n "
682 "try hpet=force on the kernel command line to "
683 "fix it up to 0xfed00000.\n", hpet_tbl->id);
687 printk(KERN_WARNING PREFIX
688 "HPET id: %#x base: 0xfed0000000000000 fixed up "
689 "to 0xfed00000.\n", hpet_tbl->id);
693 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
694 hpet_tbl->id, hpet_address);
697 * Allocate and initialize the HPET firmware resource for adding into
698 * the resource tree during the lateinit timeframe.
700 #define HPET_RESOURCE_NAME_SIZE 9
701 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
703 hpet_res->name = (void *)&hpet_res[1];
704 hpet_res->flags = IORESOURCE_MEM;
705 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
708 hpet_res->start = hpet_address;
709 hpet_res->end = hpet_address + (1 * 1024) - 1;
715 * hpet_insert_resource inserts the HPET resources used into the resource
718 static __init int hpet_insert_resource(void)
723 return insert_resource(&iomem_resource, hpet_res);
726 late_initcall(hpet_insert_resource);
729 #define acpi_parse_hpet NULL
732 static int __init acpi_parse_fadt(struct acpi_table_header *table)
735 #ifdef CONFIG_X86_PM_TIMER
736 /* detect the location of the ACPI PM Timer */
737 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
739 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
740 ACPI_ADR_SPACE_SYSTEM_IO)
743 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
745 * "X" fields are optional extensions to the original V1.0
746 * fields, so we must selectively expand V1.0 fields if the
747 * corresponding X field is zero.
750 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
753 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
756 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
762 #ifdef CONFIG_X86_LOCAL_APIC
764 * Parse LAPIC entries in MADT
765 * returns 0 on success, < 0 on error
768 static void __init acpi_register_lapic_address(unsigned long address)
770 mp_lapic_addr = address;
772 set_fixmap_nocache(FIX_APIC_BASE, address);
773 if (boot_cpu_physical_apicid == -1U) {
774 boot_cpu_physical_apicid = read_apic_id();
775 apic_version[boot_cpu_physical_apicid] =
776 GET_APIC_VERSION(apic_read(APIC_LVR));
780 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
788 * Note that the LAPIC address is obtained from the MADT (32-bit value)
789 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
793 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
794 acpi_parse_lapic_addr_ovr, 0);
796 printk(KERN_ERR PREFIX
797 "Error parsing LAPIC address override entry\n");
801 acpi_register_lapic_address(acpi_lapic_addr);
806 static int __init acpi_parse_madt_lapic_entries(void)
815 * Note that the LAPIC address is obtained from the MADT (32-bit value)
816 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
820 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
821 acpi_parse_lapic_addr_ovr, 0);
823 printk(KERN_ERR PREFIX
824 "Error parsing LAPIC address override entry\n");
828 acpi_register_lapic_address(acpi_lapic_addr);
830 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
831 acpi_parse_sapic, MAX_APICS);
834 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
835 acpi_parse_x2apic, MAX_APICS);
836 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
837 acpi_parse_lapic, MAX_APICS);
839 if (!count && !x2count) {
840 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
841 /* TBD: Cleanup to allow fallback to MPS */
843 } else if (count < 0 || x2count < 0) {
844 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
845 /* TBD: Cleanup to allow fallback to MPS */
850 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
851 acpi_parse_x2apic_nmi, 0);
853 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
854 if (count < 0 || x2count < 0) {
855 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
856 /* TBD: Cleanup to allow fallback to MPS */
861 #endif /* CONFIG_X86_LOCAL_APIC */
863 #ifdef CONFIG_X86_IO_APIC
866 #ifdef CONFIG_X86_ES7000
867 extern int es7000_plat;
870 int __init acpi_probe_gsi(void)
883 for (idx = 0; idx < nr_ioapics; idx++) {
884 gsi = mp_gsi_routing[idx].gsi_end;
893 static void assign_to_mp_irq(struct mpc_intsrc *m,
894 struct mpc_intsrc *mp_irq)
896 memcpy(mp_irq, m, sizeof(struct mpc_intsrc));
899 static int mp_irq_cmp(struct mpc_intsrc *mp_irq,
900 struct mpc_intsrc *m)
902 return memcmp(mp_irq, m, sizeof(struct mpc_intsrc));
905 static void save_mp_irq(struct mpc_intsrc *m)
909 for (i = 0; i < mp_irq_entries; i++) {
910 if (!mp_irq_cmp(&mp_irqs[i], m))
914 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
915 if (++mp_irq_entries == MAX_IRQ_SOURCES)
916 panic("Max # of irq sources exceeded!!\n");
919 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
923 struct mpc_intsrc mp_irq;
926 * Convert 'gsi' to 'ioapic.pin'.
928 ioapic = mp_find_ioapic(gsi);
931 pin = mp_find_ioapic_pin(ioapic, gsi);
934 * TBD: This check is for faulty timer entries, where the override
935 * erroneously sets the trigger to level, resulting in a HUGE
936 * increase of timer interrupts!
938 if ((bus_irq == 0) && (trigger == 3))
941 mp_irq.type = MP_INTSRC;
942 mp_irq.irqtype = mp_INT;
943 mp_irq.irqflag = (trigger << 2) | polarity;
944 mp_irq.srcbus = MP_ISA_BUS;
945 mp_irq.srcbusirq = bus_irq; /* IRQ */
946 mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */
947 mp_irq.dstirq = pin; /* INTIN# */
949 save_mp_irq(&mp_irq);
952 void __init mp_config_acpi_legacy_irqs(void)
956 unsigned int dstapic;
957 struct mpc_intsrc mp_irq;
959 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
961 * Fabricate the legacy ISA bus (bus #31).
963 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
965 set_bit(MP_ISA_BUS, mp_bus_not_pci);
966 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
968 #ifdef CONFIG_X86_ES7000
970 * Older generations of ES7000 have no legacy identity mappings
972 if (es7000_plat == 1)
977 * Locate the IOAPIC that manages the ISA IRQs (0-15).
979 ioapic = mp_find_ioapic(0);
982 dstapic = mp_ioapics[ioapic].apicid;
985 * Use the default configuration for the IRQs 0-15. Unless
986 * overridden by (MADT) interrupt source override entries.
988 for (i = 0; i < 16; i++) {
991 for (idx = 0; idx < mp_irq_entries; idx++) {
992 struct mpc_intsrc *irq = mp_irqs + idx;
994 /* Do we already have a mapping for this ISA IRQ? */
995 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
998 /* Do we already have a mapping for this IOAPIC pin */
999 if (irq->dstapic == dstapic && irq->dstirq == i)
1003 if (idx != mp_irq_entries) {
1004 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1005 continue; /* IRQ already used */
1008 mp_irq.type = MP_INTSRC;
1009 mp_irq.irqflag = 0; /* Conforming */
1010 mp_irq.srcbus = MP_ISA_BUS;
1011 mp_irq.dstapic = dstapic;
1012 mp_irq.irqtype = mp_INT;
1013 mp_irq.srcbusirq = i; /* Identity mapped */
1016 save_mp_irq(&mp_irq);
1020 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1023 #ifdef CONFIG_X86_MPPARSE
1024 struct mpc_intsrc mp_irq;
1025 struct pci_dev *pdev;
1026 unsigned char number;
1035 if (dev->bus != &pci_bus_type)
1038 pdev = to_pci_dev(dev);
1039 number = pdev->bus->number;
1040 devfn = pdev->devfn;
1042 /* print the entry should happen on mptable identically */
1043 mp_irq.type = MP_INTSRC;
1044 mp_irq.irqtype = mp_INT;
1045 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1046 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1047 mp_irq.srcbus = number;
1048 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1049 ioapic = mp_find_ioapic(gsi);
1050 mp_irq.dstapic = mp_ioapics[ioapic].apicid;
1051 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1053 save_mp_irq(&mp_irq);
1058 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1062 struct io_apic_irq_attr irq_attr;
1064 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1067 /* Don't set up the ACPI SCI because it's already set up */
1068 if (acpi_gbl_FADT.sci_interrupt == gsi)
1071 ioapic = mp_find_ioapic(gsi);
1073 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1077 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1079 #ifdef CONFIG_X86_32
1080 if (ioapic_renumber_irq)
1081 gsi = ioapic_renumber_irq(ioapic, gsi);
1084 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1085 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1086 "%d-%d\n", mp_ioapics[ioapic].apicid,
1091 if (enable_update_mptable)
1092 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1094 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1095 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1096 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1097 io_apic_set_pci_routing(dev, gsi, &irq_attr);
1103 * Parse IOAPIC related entries in MADT
1104 * returns 0 on success, < 0 on error
1106 static int __init acpi_parse_madt_ioapic_entries(void)
1111 * ACPI interpreter is required to complete interrupt setup,
1112 * so if it is off, don't enumerate the io-apics with ACPI.
1113 * If MPS is present, it will handle them,
1114 * otherwise the system will stay in PIC mode
1116 if (acpi_disabled || acpi_noirq)
1123 * if "noapic" boot option, don't look for IO-APICs
1125 if (skip_ioapic_setup) {
1126 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1127 "due to 'noapic' option.\n");
1132 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1135 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1137 } else if (count < 0) {
1138 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1143 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1146 printk(KERN_ERR PREFIX
1147 "Error parsing interrupt source overrides entry\n");
1148 /* TBD: Cleanup to allow fallback to MPS */
1153 * If BIOS did not supply an INT_SRC_OVR for the SCI
1154 * pretend we got one so we can set the SCI flags.
1156 if (!acpi_sci_override_gsi)
1157 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1159 /* Fill in identity legacy mappings where no override */
1160 mp_config_acpi_legacy_irqs();
1163 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1166 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1167 /* TBD: Cleanup to allow fallback to MPS */
1174 static inline int acpi_parse_madt_ioapic_entries(void)
1178 #endif /* !CONFIG_X86_IO_APIC */
1180 static void __init early_acpi_process_madt(void)
1182 #ifdef CONFIG_X86_LOCAL_APIC
1185 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1188 * Parse MADT LAPIC entries
1190 error = early_acpi_parse_madt_lapic_addr_ovr();
1193 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");
1207 static void __init acpi_process_madt(void)
1209 #ifdef CONFIG_X86_LOCAL_APIC
1212 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1215 * Parse MADT LAPIC entries
1217 error = acpi_parse_madt_lapic_entries();
1222 * Parse MADT IO-APIC entries
1224 error = acpi_parse_madt_ioapic_entries();
1226 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1229 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");
1242 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1243 * In the event an MPS table was found, forget it.
1244 * Boot with "acpi=off" to use MPS on such a system.
1246 if (smp_found_config) {
1247 printk(KERN_WARNING PREFIX
1248 "No APIC-table, disabling MPS\n");
1249 smp_found_config = 0;
1254 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1255 * processors, where MPS only supports physical.
1257 if (acpi_lapic && acpi_ioapic)
1258 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1260 else if (acpi_lapic)
1261 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1262 "configuration information\n");
1267 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1270 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1277 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1280 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1287 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1290 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1294 "Warning: DMI blacklist says broken, but acpi forced\n");
1300 * Force ignoring BIOS IRQ0 pin2 override
1302 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1305 * The ati_ixp4x0_rev() early PCI quirk should have set
1306 * the acpi_skip_timer_override flag already:
1308 if (!acpi_skip_timer_override) {
1309 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1310 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1312 acpi_skip_timer_override = 1;
1318 * If your system is blacklisted here, but you find that acpi=force
1319 * works for you, please contact linux-acpi@vger.kernel.org
1321 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1323 * Boxes that need ACPI disabled
1326 .callback = dmi_disable_acpi,
1327 .ident = "IBM Thinkpad",
1329 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1330 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1335 * Boxes that need ACPI PCI IRQ routing disabled
1338 .callback = disable_acpi_irq,
1339 .ident = "ASUS A7V",
1341 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1342 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1343 /* newer BIOS, Revision 1011, does work */
1344 DMI_MATCH(DMI_BIOS_VERSION,
1345 "ASUS A7V ACPI BIOS Revision 1007"),
1350 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1351 * for LPC bridge, which is needed for the PCI
1352 * interrupt links to work. DSDT fix is in bug 5966.
1353 * 2645, 2646 model numbers are shared with 600/600E/600X
1355 .callback = disable_acpi_irq,
1356 .ident = "IBM Thinkpad 600 Series 2645",
1358 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1359 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1363 .callback = disable_acpi_irq,
1364 .ident = "IBM Thinkpad 600 Series 2646",
1366 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1367 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1371 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1374 .callback = disable_acpi_pci,
1375 .ident = "ASUS PR-DLS",
1377 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1378 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1379 DMI_MATCH(DMI_BIOS_VERSION,
1380 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1381 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1385 .callback = disable_acpi_pci,
1386 .ident = "Acer TravelMate 36x Laptop",
1388 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1389 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1395 /* second table for DMI checks that should run after early-quirks */
1396 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1398 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1399 * which includes some code which overrides all temperature
1400 * trip points to 16C if the INTIN2 input of the I/O APIC
1401 * is enabled. This input is incorrectly designated the
1402 * ISA IRQ 0 via an interrupt source override even though
1403 * it is wired to the output of the master 8259A and INTIN0
1404 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1405 * override in that cases.
1408 .callback = dmi_ignore_irq0_timer_override,
1409 .ident = "HP nx6115 laptop",
1411 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1412 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1416 .callback = dmi_ignore_irq0_timer_override,
1417 .ident = "HP NX6125 laptop",
1419 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1420 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1424 .callback = dmi_ignore_irq0_timer_override,
1425 .ident = "HP NX6325 laptop",
1427 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1428 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1432 .callback = dmi_ignore_irq0_timer_override,
1433 .ident = "HP 6715b laptop",
1435 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1436 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1443 * acpi_boot_table_init() and acpi_boot_init()
1444 * called from setup_arch(), always.
1445 * 1. checksums all tables
1446 * 2. enumerates lapics
1447 * 3. enumerates io-apics
1449 * acpi_table_init() is separate to allow reading SRAT without
1450 * other side effects.
1452 * side effects of acpi_boot_init:
1453 * acpi_lapic = 1 if LAPIC found
1454 * acpi_ioapic = 1 if IOAPIC found
1455 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1456 * if acpi_blacklisted() acpi_disabled = 1;
1457 * acpi_irq_model=...
1461 void __init acpi_boot_table_init(void)
1463 dmi_check_system(acpi_dmi_table);
1466 * If acpi_disabled, bail out
1467 * One exception: acpi=ht continues far enough to enumerate LAPICs
1469 if (acpi_disabled && !acpi_ht)
1473 * Initialize the ACPI boot-time table parser.
1475 if (acpi_table_init()) {
1480 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1483 * blacklist may disable ACPI entirely
1485 if (acpi_blacklisted()) {
1487 printk(KERN_WARNING PREFIX "acpi=force override\n");
1489 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1496 int __init early_acpi_boot_init(void)
1499 * If acpi_disabled, bail out
1500 * One exception: acpi=ht continues far enough to enumerate LAPICs
1502 if (acpi_disabled && !acpi_ht)
1506 * Process the Multiple APIC Description Table (MADT), if present
1508 early_acpi_process_madt();
1513 int __init acpi_boot_init(void)
1515 /* those are executed after early-quirks are executed */
1516 dmi_check_system(acpi_dmi_table_late);
1519 * If acpi_disabled, bail out
1520 * One exception: acpi=ht continues far enough to enumerate LAPICs
1522 if (acpi_disabled && !acpi_ht)
1525 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1528 * set sci_int and PM timer address
1530 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1533 * Process the Multiple APIC Description Table (MADT), if present
1535 acpi_process_madt();
1537 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1540 x86_init.pci.init = pci_acpi_init;
1545 static int __init parse_acpi(char *arg)
1550 /* "acpi=off" disables both ACPI table parsing and interpreter */
1551 if (strcmp(arg, "off") == 0) {
1554 /* acpi=force to over-ride black-list */
1555 else if (strcmp(arg, "force") == 0) {
1560 /* acpi=strict disables out-of-spec workarounds */
1561 else if (strcmp(arg, "strict") == 0) {
1564 /* Limit ACPI just to boot-time to enable HT */
1565 else if (strcmp(arg, "ht") == 0) {
1567 printk(KERN_WARNING "acpi=ht will be removed in Linux-2.6.35\n");
1572 /* acpi=rsdt use RSDT instead of XSDT */
1573 else if (strcmp(arg, "rsdt") == 0) {
1574 acpi_rsdt_forced = 1;
1576 /* "acpi=noirq" disables ACPI interrupt routing */
1577 else if (strcmp(arg, "noirq") == 0) {
1580 /* Core will printk when we return error. */
1585 early_param("acpi", parse_acpi);
1587 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1588 static int __init parse_pci(char *arg)
1590 if (arg && strcmp(arg, "noacpi") == 0)
1594 early_param("pci", parse_pci);
1596 int __init acpi_mps_check(void)
1598 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1599 /* mptable code is not built-in*/
1600 if (acpi_disabled || acpi_noirq) {
1601 printk(KERN_WARNING "MPS support code is not built-in.\n"
1602 "Using acpi=off or acpi=noirq or pci=noacpi "
1603 "may have problem\n");
1610 #ifdef CONFIG_X86_IO_APIC
1611 static int __init parse_acpi_skip_timer_override(char *arg)
1613 acpi_skip_timer_override = 1;
1616 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1618 static int __init parse_acpi_use_timer_override(char *arg)
1620 acpi_use_timer_override = 1;
1623 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1624 #endif /* CONFIG_X86_IO_APIC */
1626 static int __init setup_acpi_sci(char *s)
1630 if (!strcmp(s, "edge"))
1631 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1632 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1633 else if (!strcmp(s, "level"))
1634 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1635 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1636 else if (!strcmp(s, "high"))
1637 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1638 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1639 else if (!strcmp(s, "low"))
1640 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1641 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1646 early_param("acpi_sci", setup_acpi_sci);
1648 int __acpi_acquire_global_lock(unsigned int *lock)
1650 unsigned int old, new, val;
1653 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1654 val = cmpxchg(lock, old, new);
1655 } while (unlikely (val != old));
1656 return (new < 3) ? -1 : 0;
1659 int __acpi_release_global_lock(unsigned int *lock)
1661 unsigned int old, new, val;
1665 val = cmpxchg(lock, old, new);
1666 } while (unlikely (val != old));