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/bootmem.h>
35 #include <linux/ioport.h>
36 #include <linux/pci.h>
38 #include <asm/pgtable.h>
39 #include <asm/io_apic.h>
42 #include <asm/mpspec.h>
45 static int __initdata acpi_force = 0;
48 EXPORT_SYMBOL(acpi_disabled);
51 # include <asm/proto.h>
52 # include <asm/numa_64.h>
55 #define BAD_MADT_ENTRY(entry, end) ( \
56 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
57 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
59 #define PREFIX "ACPI: "
61 int acpi_noirq; /* skip ACPI IRQ initialization */
62 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
63 EXPORT_SYMBOL(acpi_pci_disabled);
64 int acpi_ht __initdata = 1; /* enable HT */
70 u8 acpi_sci_flags __initdata;
71 int acpi_sci_override_gsi __initdata;
72 int acpi_skip_timer_override __initdata;
73 int acpi_use_timer_override __initdata;
75 #ifdef CONFIG_X86_LOCAL_APIC
76 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
79 #ifndef __HAVE_ARCH_CMPXCHG
80 #warning ACPI uses CMPXCHG, i486 and later hardware
83 /* --------------------------------------------------------------------------
84 Boot-time Configuration
85 -------------------------------------------------------------------------- */
88 * The default interrupt routing model is PIC (8259). This gets
89 * overridden if IOAPICs are enumerated (below).
91 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
95 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
96 * to map the target physical address. The problem is that set_fixmap()
97 * provides a single page, and it is possible that the page is not
99 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
100 * i.e. until the next __va_range() call.
102 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
103 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
104 * count idx down while incrementing the phys address.
106 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
112 return early_ioremap(phys, size);
114 void __init __acpi_unmap_table(char *map, unsigned long size)
119 early_iounmap(map, size);
122 #ifdef CONFIG_X86_LOCAL_APIC
123 static int __init acpi_parse_madt(struct acpi_table_header *table)
125 struct acpi_table_madt *madt = NULL;
130 madt = (struct acpi_table_madt *)table;
132 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
137 acpi_lapic_addr = (u64) madt->address;
139 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
143 default_acpi_madt_oem_check(madt->header.oem_id,
144 madt->header.oem_table_id);
149 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
151 unsigned int ver = 0;
158 if (boot_cpu_physical_apicid != -1U)
159 ver = apic_version[boot_cpu_physical_apicid];
161 generic_processor_info(id, ver);
165 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
167 struct acpi_madt_local_x2apic *processor = NULL;
169 processor = (struct acpi_madt_local_x2apic *)header;
171 if (BAD_MADT_ENTRY(processor, end))
174 acpi_table_print_madt_entry(header);
176 #ifdef CONFIG_X86_X2APIC
178 * We need to register disabled CPU as well to permit
179 * counting disabled CPUs. This allows us to size
180 * cpus_possible_map more accurately, to permit
181 * to not preallocating memory for all NR_CPUS
182 * when we use CPU hotplug.
184 acpi_register_lapic(processor->local_apic_id, /* APIC ID */
185 processor->lapic_flags & ACPI_MADT_ENABLED);
187 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
194 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
196 struct acpi_madt_local_apic *processor = NULL;
198 processor = (struct acpi_madt_local_apic *)header;
200 if (BAD_MADT_ENTRY(processor, end))
203 acpi_table_print_madt_entry(header);
206 * We need to register disabled CPU as well to permit
207 * counting disabled CPUs. This allows us to size
208 * cpus_possible_map more accurately, to permit
209 * to not preallocating memory for all NR_CPUS
210 * when we use CPU hotplug.
212 acpi_register_lapic(processor->id, /* APIC ID */
213 processor->lapic_flags & ACPI_MADT_ENABLED);
219 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
221 struct acpi_madt_local_sapic *processor = NULL;
223 processor = (struct acpi_madt_local_sapic *)header;
225 if (BAD_MADT_ENTRY(processor, end))
228 acpi_table_print_madt_entry(header);
230 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
231 processor->lapic_flags & ACPI_MADT_ENABLED);
237 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
238 const unsigned long end)
240 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
242 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
244 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
247 acpi_lapic_addr = lapic_addr_ovr->address;
253 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
254 const unsigned long end)
256 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
258 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
260 if (BAD_MADT_ENTRY(x2apic_nmi, end))
263 acpi_table_print_madt_entry(header);
265 if (x2apic_nmi->lint != 1)
266 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
272 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
274 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
276 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
278 if (BAD_MADT_ENTRY(lapic_nmi, end))
281 acpi_table_print_madt_entry(header);
283 if (lapic_nmi->lint != 1)
284 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
289 #endif /*CONFIG_X86_LOCAL_APIC */
291 #ifdef CONFIG_X86_IO_APIC
294 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
296 struct acpi_madt_io_apic *ioapic = NULL;
298 ioapic = (struct acpi_madt_io_apic *)header;
300 if (BAD_MADT_ENTRY(ioapic, end))
303 acpi_table_print_madt_entry(header);
305 mp_register_ioapic(ioapic->id,
306 ioapic->address, ioapic->global_irq_base);
312 * Parse Interrupt Source Override for the ACPI SCI
314 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
316 if (trigger == 0) /* compatible SCI trigger is level */
319 if (polarity == 0) /* compatible SCI polarity is low */
322 /* Command-line over-ride via acpi_sci= */
323 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
324 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
326 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
327 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
330 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
331 * If GSI is < 16, this will update its flags,
332 * else it will create a new mp_irqs[] entry.
334 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
337 * stash over-ride to indicate we've been here
338 * and for later update of acpi_gbl_FADT
340 acpi_sci_override_gsi = gsi;
345 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
346 const unsigned long end)
348 struct acpi_madt_interrupt_override *intsrc = NULL;
350 intsrc = (struct acpi_madt_interrupt_override *)header;
352 if (BAD_MADT_ENTRY(intsrc, end))
355 acpi_table_print_madt_entry(header);
357 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
358 acpi_sci_ioapic_setup(intsrc->global_irq,
359 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
360 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
364 if (acpi_skip_timer_override &&
365 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
366 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
370 mp_override_legacy_irq(intsrc->source_irq,
371 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
372 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
379 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
381 struct acpi_madt_nmi_source *nmi_src = NULL;
383 nmi_src = (struct acpi_madt_nmi_source *)header;
385 if (BAD_MADT_ENTRY(nmi_src, end))
388 acpi_table_print_madt_entry(header);
390 /* TBD: Support nimsrc entries? */
395 #endif /* CONFIG_X86_IO_APIC */
398 * acpi_pic_sci_set_trigger()
400 * use ELCR to set PIC-mode trigger type for SCI
402 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
403 * it may require Edge Trigger -- use "acpi_sci=edge"
405 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
406 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
407 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
408 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
411 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
413 unsigned int mask = 1 << irq;
414 unsigned int old, new;
416 /* Real old ELCR mask */
417 old = inb(0x4d0) | (inb(0x4d1) << 8);
420 * If we use ACPI to set PCI IRQs, then we should clear ELCR
421 * since we will set it correctly as we enable the PCI irq
424 new = acpi_noirq ? old : 0;
427 * Update SCI information in the ELCR, it isn't in the PCI
431 case 1: /* Edge - clear */
434 case 3: /* Level - set */
442 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
444 outb(new >> 8, 0x4d1);
447 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
454 * success: return IRQ number (>=0)
455 * failure: return < 0
457 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
460 unsigned int plat_gsi = gsi;
464 * Make sure all (legacy) PCI IRQs are set as level-triggered.
466 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
467 if (trigger == ACPI_LEVEL_SENSITIVE)
468 eisa_set_level_irq(gsi);
472 #ifdef CONFIG_X86_IO_APIC
473 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
474 plat_gsi = mp_register_gsi(dev, gsi, trigger, polarity);
477 acpi_gsi_to_irq(plat_gsi, &irq);
482 * ACPI based hotplug support for CPU
484 #ifdef CONFIG_ACPI_HOTPLUG_CPU
486 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
488 #ifdef CONFIG_ACPI_NUMA
491 nid = acpi_get_node(handle);
492 if (nid == -1 || !node_online(nid))
495 apicid_to_node[physid] = nid;
496 numa_set_node(cpu, nid);
497 #else /* CONFIG_X86_32 */
498 apicid_2_node[physid] = nid;
499 cpu_to_node_map[cpu] = nid;
505 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
507 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
508 union acpi_object *obj;
509 struct acpi_madt_local_apic *lapic;
510 cpumask_var_t tmp_map, new_map;
513 int retval = -ENOMEM;
515 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
518 if (!buffer.length || !buffer.pointer)
521 obj = buffer.pointer;
522 if (obj->type != ACPI_TYPE_BUFFER ||
523 obj->buffer.length < sizeof(*lapic)) {
524 kfree(buffer.pointer);
528 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
530 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
531 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
532 kfree(buffer.pointer);
538 kfree(buffer.pointer);
539 buffer.length = ACPI_ALLOCATE_BUFFER;
540 buffer.pointer = NULL;
542 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
545 if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
548 cpumask_copy(tmp_map, cpu_present_mask);
549 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
552 * If mp_register_lapic successfully generates a new logical cpu
553 * number, then the following will get us exactly what was mapped
555 cpumask_andnot(new_map, cpu_present_mask, tmp_map);
556 if (cpumask_empty(new_map)) {
557 printk ("Unable to map lapic to logical cpu number\n");
562 cpu = cpumask_first(new_map);
563 acpi_map_cpu2node(handle, cpu, physid);
569 free_cpumask_var(new_map);
571 free_cpumask_var(tmp_map);
576 /* wrapper to silence section mismatch warning */
577 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
579 return _acpi_map_lsapic(handle, pcpu);
581 EXPORT_SYMBOL(acpi_map_lsapic);
583 int acpi_unmap_lsapic(int cpu)
585 per_cpu(x86_cpu_to_apicid, cpu) = -1;
586 set_cpu_present(cpu, false);
592 EXPORT_SYMBOL(acpi_unmap_lsapic);
593 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
595 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
601 EXPORT_SYMBOL(acpi_register_ioapic);
603 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
609 EXPORT_SYMBOL(acpi_unregister_ioapic);
611 static int __init acpi_parse_sbf(struct acpi_table_header *table)
613 struct acpi_table_boot *sb;
615 sb = (struct acpi_table_boot *)table;
617 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
621 sbf_port = sb->cmos_index; /* Save CMOS port */
626 #ifdef CONFIG_HPET_TIMER
627 #include <asm/hpet.h>
629 static struct __initdata resource *hpet_res;
631 static int __init acpi_parse_hpet(struct acpi_table_header *table)
633 struct acpi_table_hpet *hpet_tbl;
635 hpet_tbl = (struct acpi_table_hpet *)table;
637 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
641 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
642 printk(KERN_WARNING PREFIX "HPET timers must be located in "
647 hpet_address = hpet_tbl->address.address;
648 hpet_blockid = hpet_tbl->sequence;
651 * Some broken BIOSes advertise HPET at 0x0. We really do not
652 * want to allocate a resource there.
655 printk(KERN_WARNING PREFIX
656 "HPET id: %#x base: %#lx is invalid\n",
657 hpet_tbl->id, hpet_address);
662 * Some even more broken BIOSes advertise HPET at
663 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
666 if (hpet_address == 0xfed0000000000000UL) {
667 if (!hpet_force_user) {
668 printk(KERN_WARNING PREFIX "HPET id: %#x "
669 "base: 0xfed0000000000000 is bogus\n "
670 "try hpet=force on the kernel command line to "
671 "fix it up to 0xfed00000.\n", hpet_tbl->id);
675 printk(KERN_WARNING PREFIX
676 "HPET id: %#x base: 0xfed0000000000000 fixed up "
677 "to 0xfed00000.\n", hpet_tbl->id);
681 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
682 hpet_tbl->id, hpet_address);
685 * Allocate and initialize the HPET firmware resource for adding into
686 * the resource tree during the lateinit timeframe.
688 #define HPET_RESOURCE_NAME_SIZE 9
689 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
691 hpet_res->name = (void *)&hpet_res[1];
692 hpet_res->flags = IORESOURCE_MEM;
693 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
696 hpet_res->start = hpet_address;
697 hpet_res->end = hpet_address + (1 * 1024) - 1;
703 * hpet_insert_resource inserts the HPET resources used into the resource
706 static __init int hpet_insert_resource(void)
711 return insert_resource(&iomem_resource, hpet_res);
714 late_initcall(hpet_insert_resource);
717 #define acpi_parse_hpet NULL
720 static int __init acpi_parse_fadt(struct acpi_table_header *table)
723 #ifdef CONFIG_X86_PM_TIMER
724 /* detect the location of the ACPI PM Timer */
725 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
727 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
728 ACPI_ADR_SPACE_SYSTEM_IO)
731 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
733 * "X" fields are optional extensions to the original V1.0
734 * fields, so we must selectively expand V1.0 fields if the
735 * corresponding X field is zero.
738 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
741 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
744 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
750 #ifdef CONFIG_X86_LOCAL_APIC
752 * Parse LAPIC entries in MADT
753 * returns 0 on success, < 0 on error
756 static void __init acpi_register_lapic_address(unsigned long address)
758 mp_lapic_addr = address;
760 set_fixmap_nocache(FIX_APIC_BASE, address);
761 if (boot_cpu_physical_apicid == -1U) {
762 boot_cpu_physical_apicid = read_apic_id();
763 apic_version[boot_cpu_physical_apicid] =
764 GET_APIC_VERSION(apic_read(APIC_LVR));
768 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
776 * Note that the LAPIC address is obtained from the MADT (32-bit value)
777 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
781 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
782 acpi_parse_lapic_addr_ovr, 0);
784 printk(KERN_ERR PREFIX
785 "Error parsing LAPIC address override entry\n");
789 acpi_register_lapic_address(acpi_lapic_addr);
794 static int __init acpi_parse_madt_lapic_entries(void)
803 * Note that the LAPIC address is obtained from the MADT (32-bit value)
804 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
808 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
809 acpi_parse_lapic_addr_ovr, 0);
811 printk(KERN_ERR PREFIX
812 "Error parsing LAPIC address override entry\n");
816 acpi_register_lapic_address(acpi_lapic_addr);
818 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
819 acpi_parse_sapic, MAX_APICS);
822 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
823 acpi_parse_x2apic, MAX_APICS);
824 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
825 acpi_parse_lapic, MAX_APICS);
827 if (!count && !x2count) {
828 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
829 /* TBD: Cleanup to allow fallback to MPS */
831 } else if (count < 0 || x2count < 0) {
832 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
833 /* TBD: Cleanup to allow fallback to MPS */
838 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
839 acpi_parse_x2apic_nmi, 0);
841 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
842 if (count < 0 || x2count < 0) {
843 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
844 /* TBD: Cleanup to allow fallback to MPS */
849 #endif /* CONFIG_X86_LOCAL_APIC */
851 #ifdef CONFIG_X86_IO_APIC
854 #ifdef CONFIG_X86_ES7000
855 extern int es7000_plat;
858 int __init acpi_probe_gsi(void)
871 for (idx = 0; idx < nr_ioapics; idx++) {
872 gsi = mp_gsi_routing[idx].gsi_end;
881 static void assign_to_mp_irq(struct mpc_intsrc *m,
882 struct mpc_intsrc *mp_irq)
884 memcpy(mp_irq, m, sizeof(struct mpc_intsrc));
887 static int mp_irq_cmp(struct mpc_intsrc *mp_irq,
888 struct mpc_intsrc *m)
890 return memcmp(mp_irq, m, sizeof(struct mpc_intsrc));
893 static void save_mp_irq(struct mpc_intsrc *m)
897 for (i = 0; i < mp_irq_entries; i++) {
898 if (!mp_irq_cmp(&mp_irqs[i], m))
902 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
903 if (++mp_irq_entries == MAX_IRQ_SOURCES)
904 panic("Max # of irq sources exceeded!!\n");
907 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
911 struct mpc_intsrc mp_irq;
914 * Convert 'gsi' to 'ioapic.pin'.
916 ioapic = mp_find_ioapic(gsi);
919 pin = mp_find_ioapic_pin(ioapic, gsi);
922 * TBD: This check is for faulty timer entries, where the override
923 * erroneously sets the trigger to level, resulting in a HUGE
924 * increase of timer interrupts!
926 if ((bus_irq == 0) && (trigger == 3))
929 mp_irq.type = MP_INTSRC;
930 mp_irq.irqtype = mp_INT;
931 mp_irq.irqflag = (trigger << 2) | polarity;
932 mp_irq.srcbus = MP_ISA_BUS;
933 mp_irq.srcbusirq = bus_irq; /* IRQ */
934 mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */
935 mp_irq.dstirq = pin; /* INTIN# */
937 save_mp_irq(&mp_irq);
940 void __init mp_config_acpi_legacy_irqs(void)
944 unsigned int dstapic;
945 struct mpc_intsrc mp_irq;
947 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
949 * Fabricate the legacy ISA bus (bus #31).
951 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
953 set_bit(MP_ISA_BUS, mp_bus_not_pci);
954 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
956 #ifdef CONFIG_X86_ES7000
958 * Older generations of ES7000 have no legacy identity mappings
960 if (es7000_plat == 1)
965 * Locate the IOAPIC that manages the ISA IRQs (0-15).
967 ioapic = mp_find_ioapic(0);
970 dstapic = mp_ioapics[ioapic].apicid;
973 * Use the default configuration for the IRQs 0-15. Unless
974 * overridden by (MADT) interrupt source override entries.
976 for (i = 0; i < 16; i++) {
979 for (idx = 0; idx < mp_irq_entries; idx++) {
980 struct mpc_intsrc *irq = mp_irqs + idx;
982 /* Do we already have a mapping for this ISA IRQ? */
983 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
986 /* Do we already have a mapping for this IOAPIC pin */
987 if (irq->dstapic == dstapic && irq->dstirq == i)
991 if (idx != mp_irq_entries) {
992 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
993 continue; /* IRQ already used */
996 mp_irq.type = MP_INTSRC;
997 mp_irq.irqflag = 0; /* Conforming */
998 mp_irq.srcbus = MP_ISA_BUS;
999 mp_irq.dstapic = dstapic;
1000 mp_irq.irqtype = mp_INT;
1001 mp_irq.srcbusirq = i; /* Identity mapped */
1004 save_mp_irq(&mp_irq);
1008 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1011 #ifdef CONFIG_X86_MPPARSE
1012 struct mpc_intsrc mp_irq;
1013 struct pci_dev *pdev;
1014 unsigned char number;
1023 if (dev->bus != &pci_bus_type)
1026 pdev = to_pci_dev(dev);
1027 number = pdev->bus->number;
1028 devfn = pdev->devfn;
1030 /* print the entry should happen on mptable identically */
1031 mp_irq.type = MP_INTSRC;
1032 mp_irq.irqtype = mp_INT;
1033 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1034 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1035 mp_irq.srcbus = number;
1036 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1037 ioapic = mp_find_ioapic(gsi);
1038 mp_irq.dstapic = mp_ioapics[ioapic].apicid;
1039 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1041 save_mp_irq(&mp_irq);
1046 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1050 struct io_apic_irq_attr irq_attr;
1052 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1055 /* Don't set up the ACPI SCI because it's already set up */
1056 if (acpi_gbl_FADT.sci_interrupt == gsi)
1059 ioapic = mp_find_ioapic(gsi);
1061 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1065 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1067 #ifdef CONFIG_X86_32
1068 if (ioapic_renumber_irq)
1069 gsi = ioapic_renumber_irq(ioapic, gsi);
1072 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1073 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1074 "%d-%d\n", mp_ioapics[ioapic].apicid,
1079 if (enable_update_mptable)
1080 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1082 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1083 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1084 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1085 io_apic_set_pci_routing(dev, gsi, &irq_attr);
1091 * Parse IOAPIC related entries in MADT
1092 * returns 0 on success, < 0 on error
1094 static int __init acpi_parse_madt_ioapic_entries(void)
1099 * ACPI interpreter is required to complete interrupt setup,
1100 * so if it is off, don't enumerate the io-apics with ACPI.
1101 * If MPS is present, it will handle them,
1102 * otherwise the system will stay in PIC mode
1104 if (acpi_disabled || acpi_noirq)
1111 * if "noapic" boot option, don't look for IO-APICs
1113 if (skip_ioapic_setup) {
1114 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1115 "due to 'noapic' option.\n");
1120 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1123 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1125 } else if (count < 0) {
1126 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1131 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1134 printk(KERN_ERR PREFIX
1135 "Error parsing interrupt source overrides entry\n");
1136 /* TBD: Cleanup to allow fallback to MPS */
1141 * If BIOS did not supply an INT_SRC_OVR for the SCI
1142 * pretend we got one so we can set the SCI flags.
1144 if (!acpi_sci_override_gsi)
1145 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1147 /* Fill in identity legacy mappings where no override */
1148 mp_config_acpi_legacy_irqs();
1151 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1154 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1155 /* TBD: Cleanup to allow fallback to MPS */
1162 static inline int acpi_parse_madt_ioapic_entries(void)
1166 #endif /* !CONFIG_X86_IO_APIC */
1168 static void __init early_acpi_process_madt(void)
1170 #ifdef CONFIG_X86_LOCAL_APIC
1173 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1176 * Parse MADT LAPIC entries
1178 error = early_acpi_parse_madt_lapic_addr_ovr();
1181 smp_found_config = 1;
1183 if (error == -EINVAL) {
1185 * Dell Precision Workstation 410, 610 come here.
1187 printk(KERN_ERR PREFIX
1188 "Invalid BIOS MADT, disabling ACPI\n");
1195 static void __init acpi_process_madt(void)
1197 #ifdef CONFIG_X86_LOCAL_APIC
1200 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1203 * Parse MADT LAPIC entries
1205 error = acpi_parse_madt_lapic_entries();
1210 * Parse MADT IO-APIC entries
1212 error = acpi_parse_madt_ioapic_entries();
1214 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1217 smp_found_config = 1;
1220 if (error == -EINVAL) {
1222 * Dell Precision Workstation 410, 610 come here.
1224 printk(KERN_ERR PREFIX
1225 "Invalid BIOS MADT, disabling ACPI\n");
1230 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1231 * In the event an MPS table was found, forget it.
1232 * Boot with "acpi=off" to use MPS on such a system.
1234 if (smp_found_config) {
1235 printk(KERN_WARNING PREFIX
1236 "No APIC-table, disabling MPS\n");
1237 smp_found_config = 0;
1242 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1243 * processors, where MPS only supports physical.
1245 if (acpi_lapic && acpi_ioapic)
1246 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1248 else if (acpi_lapic)
1249 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1250 "configuration information\n");
1255 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1258 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1265 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1268 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1275 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1278 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1282 "Warning: DMI blacklist says broken, but acpi forced\n");
1288 * Limit ACPI to CPU enumeration for HT
1290 static int __init force_acpi_ht(const struct dmi_system_id *d)
1293 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1299 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1305 * Force ignoring BIOS IRQ0 pin2 override
1307 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1310 * The ati_ixp4x0_rev() early PCI quirk should have set
1311 * the acpi_skip_timer_override flag already:
1313 if (!acpi_skip_timer_override) {
1314 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1315 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1317 acpi_skip_timer_override = 1;
1323 * If your system is blacklisted here, but you find that acpi=force
1324 * works for you, please contact linux-acpi@vger.kernel.org
1326 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1328 * Boxes that need ACPI disabled
1331 .callback = dmi_disable_acpi,
1332 .ident = "IBM Thinkpad",
1334 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1335 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1340 * Boxes that need acpi=ht
1343 .callback = force_acpi_ht,
1344 .ident = "FSC Primergy T850",
1346 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1347 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1351 .callback = force_acpi_ht,
1352 .ident = "HP VISUALIZE NT Workstation",
1354 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1355 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1359 .callback = force_acpi_ht,
1360 .ident = "Compaq Workstation W8000",
1362 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1363 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1367 .callback = force_acpi_ht,
1368 .ident = "ASUS CUR-DLS",
1370 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1371 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1375 .callback = force_acpi_ht,
1376 .ident = "ABIT i440BX-W83977",
1378 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1379 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1383 .callback = force_acpi_ht,
1384 .ident = "IBM Bladecenter",
1386 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1387 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1391 .callback = force_acpi_ht,
1392 .ident = "IBM eServer xSeries 360",
1394 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1395 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1399 .callback = force_acpi_ht,
1400 .ident = "IBM eserver xSeries 330",
1402 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1403 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1407 .callback = force_acpi_ht,
1408 .ident = "IBM eserver xSeries 440",
1410 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1411 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1416 * Boxes that need ACPI PCI IRQ routing disabled
1419 .callback = disable_acpi_irq,
1420 .ident = "ASUS A7V",
1422 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1423 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1424 /* newer BIOS, Revision 1011, does work */
1425 DMI_MATCH(DMI_BIOS_VERSION,
1426 "ASUS A7V ACPI BIOS Revision 1007"),
1431 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1432 * for LPC bridge, which is needed for the PCI
1433 * interrupt links to work. DSDT fix is in bug 5966.
1434 * 2645, 2646 model numbers are shared with 600/600E/600X
1436 .callback = disable_acpi_irq,
1437 .ident = "IBM Thinkpad 600 Series 2645",
1439 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1440 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1444 .callback = disable_acpi_irq,
1445 .ident = "IBM Thinkpad 600 Series 2646",
1447 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1448 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1452 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1455 .callback = disable_acpi_pci,
1456 .ident = "ASUS PR-DLS",
1458 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1459 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1460 DMI_MATCH(DMI_BIOS_VERSION,
1461 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1462 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1466 .callback = disable_acpi_pci,
1467 .ident = "Acer TravelMate 36x Laptop",
1469 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1470 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1476 /* second table for DMI checks that should run after early-quirks */
1477 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1479 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1480 * which includes some code which overrides all temperature
1481 * trip points to 16C if the INTIN2 input of the I/O APIC
1482 * is enabled. This input is incorrectly designated the
1483 * ISA IRQ 0 via an interrupt source override even though
1484 * it is wired to the output of the master 8259A and INTIN0
1485 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1486 * override in that cases.
1489 .callback = dmi_ignore_irq0_timer_override,
1490 .ident = "HP nx6115 laptop",
1492 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1493 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1497 .callback = dmi_ignore_irq0_timer_override,
1498 .ident = "HP NX6125 laptop",
1500 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1501 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1505 .callback = dmi_ignore_irq0_timer_override,
1506 .ident = "HP NX6325 laptop",
1508 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1509 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1513 .callback = dmi_ignore_irq0_timer_override,
1514 .ident = "HP 6715b laptop",
1516 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1517 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1524 * acpi_boot_table_init() and acpi_boot_init()
1525 * called from setup_arch(), always.
1526 * 1. checksums all tables
1527 * 2. enumerates lapics
1528 * 3. enumerates io-apics
1530 * acpi_table_init() is separate to allow reading SRAT without
1531 * other side effects.
1533 * side effects of acpi_boot_init:
1534 * acpi_lapic = 1 if LAPIC found
1535 * acpi_ioapic = 1 if IOAPIC found
1536 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1537 * if acpi_blacklisted() acpi_disabled = 1;
1538 * acpi_irq_model=...
1542 void __init acpi_boot_table_init(void)
1544 dmi_check_system(acpi_dmi_table);
1547 * If acpi_disabled, bail out
1548 * One exception: acpi=ht continues far enough to enumerate LAPICs
1550 if (acpi_disabled && !acpi_ht)
1554 * Initialize the ACPI boot-time table parser.
1556 if (acpi_table_init()) {
1561 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1564 * blacklist may disable ACPI entirely
1566 if (acpi_blacklisted()) {
1568 printk(KERN_WARNING PREFIX "acpi=force override\n");
1570 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1577 int __init early_acpi_boot_init(void)
1580 * If acpi_disabled, bail out
1581 * One exception: acpi=ht continues far enough to enumerate LAPICs
1583 if (acpi_disabled && !acpi_ht)
1587 * Process the Multiple APIC Description Table (MADT), if present
1589 early_acpi_process_madt();
1594 int __init acpi_boot_init(void)
1596 /* those are executed after early-quirks are executed */
1597 dmi_check_system(acpi_dmi_table_late);
1600 * If acpi_disabled, bail out
1601 * One exception: acpi=ht continues far enough to enumerate LAPICs
1603 if (acpi_disabled && !acpi_ht)
1606 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1609 * set sci_int and PM timer address
1611 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1614 * Process the Multiple APIC Description Table (MADT), if present
1616 acpi_process_madt();
1618 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1623 static int __init parse_acpi(char *arg)
1628 /* "acpi=off" disables both ACPI table parsing and interpreter */
1629 if (strcmp(arg, "off") == 0) {
1632 /* acpi=force to over-ride black-list */
1633 else if (strcmp(arg, "force") == 0) {
1638 /* acpi=strict disables out-of-spec workarounds */
1639 else if (strcmp(arg, "strict") == 0) {
1642 /* Limit ACPI just to boot-time to enable HT */
1643 else if (strcmp(arg, "ht") == 0) {
1648 /* acpi=rsdt use RSDT instead of XSDT */
1649 else if (strcmp(arg, "rsdt") == 0) {
1650 acpi_rsdt_forced = 1;
1652 /* "acpi=noirq" disables ACPI interrupt routing */
1653 else if (strcmp(arg, "noirq") == 0) {
1656 /* Core will printk when we return error. */
1661 early_param("acpi", parse_acpi);
1663 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1664 static int __init parse_pci(char *arg)
1666 if (arg && strcmp(arg, "noacpi") == 0)
1670 early_param("pci", parse_pci);
1672 int __init acpi_mps_check(void)
1674 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1675 /* mptable code is not built-in*/
1676 if (acpi_disabled || acpi_noirq) {
1677 printk(KERN_WARNING "MPS support code is not built-in.\n"
1678 "Using acpi=off or acpi=noirq or pci=noacpi "
1679 "may have problem\n");
1686 #ifdef CONFIG_X86_IO_APIC
1687 static int __init parse_acpi_skip_timer_override(char *arg)
1689 acpi_skip_timer_override = 1;
1692 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1694 static int __init parse_acpi_use_timer_override(char *arg)
1696 acpi_use_timer_override = 1;
1699 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1700 #endif /* CONFIG_X86_IO_APIC */
1702 static int __init setup_acpi_sci(char *s)
1706 if (!strcmp(s, "edge"))
1707 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1708 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1709 else if (!strcmp(s, "level"))
1710 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1711 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1712 else if (!strcmp(s, "high"))
1713 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1714 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1715 else if (!strcmp(s, "low"))
1716 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1717 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1722 early_param("acpi_sci", setup_acpi_sci);
1724 int __acpi_acquire_global_lock(unsigned int *lock)
1726 unsigned int old, new, val;
1729 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1730 val = cmpxchg(lock, old, new);
1731 } while (unlikely (val != old));
1732 return (new < 3) ? -1 : 0;
1735 int __acpi_release_global_lock(unsigned int *lock)
1737 unsigned int old, new, val;
1741 val = cmpxchg(lock, old, new);
1742 } while (unlikely (val != old));