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;
76 #ifdef CONFIG_X86_LOCAL_APIC
77 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
80 #ifndef __HAVE_ARCH_CMPXCHG
81 #warning ACPI uses CMPXCHG, i486 and later hardware
84 /* --------------------------------------------------------------------------
85 Boot-time Configuration
86 -------------------------------------------------------------------------- */
89 * The default interrupt routing model is PIC (8259). This gets
90 * overridden if IOAPICs are enumerated (below).
92 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
96 * ISA irqs by default are the first 16 gsis but can be
97 * any gsi as specified by an interrupt source override.
99 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
100 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
103 static unsigned int gsi_to_irq(unsigned int gsi)
105 unsigned int irq = gsi + NR_IRQS_LEGACY;
108 for (i = 0; i < NR_IRQS_LEGACY; i++) {
109 if (isa_irq_to_gsi[i] == gsi) {
114 /* Provide an identity mapping of gsi == irq
115 * except on truly weird platforms that have
116 * non isa irqs in the first 16 gsis.
118 if (gsi >= NR_IRQS_LEGACY)
126 static u32 irq_to_gsi(int irq)
130 if (irq < NR_IRQS_LEGACY)
131 gsi = isa_irq_to_gsi[irq];
132 else if (irq < gsi_top)
134 else if (irq < (gsi_top + NR_IRQS_LEGACY))
143 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
144 * to map the target physical address. The problem is that set_fixmap()
145 * provides a single page, and it is possible that the page is not
147 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
148 * i.e. until the next __va_range() call.
150 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
151 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
152 * count idx down while incrementing the phys address.
154 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
160 return early_ioremap(phys, size);
162 void __init __acpi_unmap_table(char *map, unsigned long size)
167 early_iounmap(map, size);
170 #ifdef CONFIG_X86_LOCAL_APIC
171 static int __init acpi_parse_madt(struct acpi_table_header *table)
173 struct acpi_table_madt *madt = NULL;
178 madt = (struct acpi_table_madt *)table;
180 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
185 acpi_lapic_addr = (u64) madt->address;
187 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
191 default_acpi_madt_oem_check(madt->header.oem_id,
192 madt->header.oem_table_id);
197 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
199 unsigned int ver = 0;
206 if (boot_cpu_physical_apicid != -1U)
207 ver = apic_version[boot_cpu_physical_apicid];
209 generic_processor_info(id, ver);
213 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
215 struct acpi_madt_local_x2apic *processor = NULL;
217 processor = (struct acpi_madt_local_x2apic *)header;
219 if (BAD_MADT_ENTRY(processor, end))
222 acpi_table_print_madt_entry(header);
224 #ifdef CONFIG_X86_X2APIC
226 * We need to register disabled CPU as well to permit
227 * counting disabled CPUs. This allows us to size
228 * cpus_possible_map more accurately, to permit
229 * to not preallocating memory for all NR_CPUS
230 * when we use CPU hotplug.
232 acpi_register_lapic(processor->local_apic_id, /* APIC ID */
233 processor->lapic_flags & ACPI_MADT_ENABLED);
235 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
242 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
244 struct acpi_madt_local_apic *processor = NULL;
246 processor = (struct acpi_madt_local_apic *)header;
248 if (BAD_MADT_ENTRY(processor, end))
251 acpi_table_print_madt_entry(header);
254 * We need to register disabled CPU as well to permit
255 * counting disabled CPUs. This allows us to size
256 * cpus_possible_map more accurately, to permit
257 * to not preallocating memory for all NR_CPUS
258 * when we use CPU hotplug.
260 acpi_register_lapic(processor->id, /* APIC ID */
261 processor->lapic_flags & ACPI_MADT_ENABLED);
267 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
269 struct acpi_madt_local_sapic *processor = NULL;
271 processor = (struct acpi_madt_local_sapic *)header;
273 if (BAD_MADT_ENTRY(processor, end))
276 acpi_table_print_madt_entry(header);
278 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
279 processor->lapic_flags & ACPI_MADT_ENABLED);
285 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
286 const unsigned long end)
288 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
290 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
292 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
295 acpi_lapic_addr = lapic_addr_ovr->address;
301 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
302 const unsigned long end)
304 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
306 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
308 if (BAD_MADT_ENTRY(x2apic_nmi, end))
311 acpi_table_print_madt_entry(header);
313 if (x2apic_nmi->lint != 1)
314 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
320 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
322 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
324 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
326 if (BAD_MADT_ENTRY(lapic_nmi, end))
329 acpi_table_print_madt_entry(header);
331 if (lapic_nmi->lint != 1)
332 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
337 #endif /*CONFIG_X86_LOCAL_APIC */
339 #ifdef CONFIG_X86_IO_APIC
342 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
344 struct acpi_madt_io_apic *ioapic = NULL;
346 ioapic = (struct acpi_madt_io_apic *)header;
348 if (BAD_MADT_ENTRY(ioapic, end))
351 acpi_table_print_madt_entry(header);
353 mp_register_ioapic(ioapic->id,
354 ioapic->address, ioapic->global_irq_base);
360 * Parse Interrupt Source Override for the ACPI SCI
362 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
364 if (trigger == 0) /* compatible SCI trigger is level */
367 if (polarity == 0) /* compatible SCI polarity is low */
370 /* Command-line over-ride via acpi_sci= */
371 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
372 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
374 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
375 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
378 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
379 * If GSI is < 16, this will update its flags,
380 * else it will create a new mp_irqs[] entry.
382 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
385 * stash over-ride to indicate we've been here
386 * and for later update of acpi_gbl_FADT
388 acpi_sci_override_gsi = gsi;
393 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
394 const unsigned long end)
396 struct acpi_madt_interrupt_override *intsrc = NULL;
398 intsrc = (struct acpi_madt_interrupt_override *)header;
400 if (BAD_MADT_ENTRY(intsrc, end))
403 acpi_table_print_madt_entry(header);
405 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
406 acpi_sci_ioapic_setup(intsrc->source_irq,
407 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
408 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
413 if (acpi_skip_timer_override &&
414 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
415 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
419 mp_override_legacy_irq(intsrc->source_irq,
420 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
421 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
428 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
430 struct acpi_madt_nmi_source *nmi_src = NULL;
432 nmi_src = (struct acpi_madt_nmi_source *)header;
434 if (BAD_MADT_ENTRY(nmi_src, end))
437 acpi_table_print_madt_entry(header);
439 /* TBD: Support nimsrc entries? */
444 #endif /* CONFIG_X86_IO_APIC */
447 * acpi_pic_sci_set_trigger()
449 * use ELCR to set PIC-mode trigger type for SCI
451 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
452 * it may require Edge Trigger -- use "acpi_sci=edge"
454 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
455 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
456 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
457 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
460 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
462 unsigned int mask = 1 << irq;
463 unsigned int old, new;
465 /* Real old ELCR mask */
466 old = inb(0x4d0) | (inb(0x4d1) << 8);
469 * If we use ACPI to set PCI IRQs, then we should clear ELCR
470 * since we will set it correctly as we enable the PCI irq
473 new = acpi_noirq ? old : 0;
476 * Update SCI information in the ELCR, it isn't in the PCI
480 case 1: /* Edge - clear */
483 case 3: /* Level - set */
491 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
493 outb(new >> 8, 0x4d1);
496 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
498 *irq = gsi_to_irq(gsi);
500 #ifdef CONFIG_X86_IO_APIC
501 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
502 setup_IO_APIC_irq_extra(gsi);
507 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
509 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
513 *gsi = irq_to_gsi(isa_irq);
517 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
518 int trigger, int polarity)
522 * Make sure all (legacy) PCI IRQs are set as level-triggered.
524 if (trigger == ACPI_LEVEL_SENSITIVE)
525 eisa_set_level_irq(gsi);
531 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
532 int trigger, int polarity)
534 #ifdef CONFIG_X86_IO_APIC
535 gsi = mp_register_gsi(dev, gsi, trigger, polarity);
541 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
542 int trigger, int polarity) = acpi_register_gsi_pic;
545 * success: return IRQ number (>=0)
546 * failure: return < 0
548 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
551 unsigned int plat_gsi = gsi;
553 plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity);
554 irq = gsi_to_irq(plat_gsi);
559 void __init acpi_set_irq_model_pic(void)
561 acpi_irq_model = ACPI_IRQ_MODEL_PIC;
562 __acpi_register_gsi = acpi_register_gsi_pic;
566 void __init acpi_set_irq_model_ioapic(void)
568 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
569 __acpi_register_gsi = acpi_register_gsi_ioapic;
574 * ACPI based hotplug support for CPU
576 #ifdef CONFIG_ACPI_HOTPLUG_CPU
577 #include <acpi/processor.h>
579 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
581 #ifdef CONFIG_ACPI_NUMA
584 nid = acpi_get_node(handle);
585 if (nid == -1 || !node_online(nid))
588 apicid_to_node[physid] = nid;
589 numa_set_node(cpu, nid);
590 #else /* CONFIG_X86_32 */
591 apicid_2_node[physid] = nid;
592 cpu_to_node_map[cpu] = nid;
598 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
600 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
601 union acpi_object *obj;
602 struct acpi_madt_local_apic *lapic;
603 cpumask_var_t tmp_map, new_map;
606 int retval = -ENOMEM;
608 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
611 if (!buffer.length || !buffer.pointer)
614 obj = buffer.pointer;
615 if (obj->type != ACPI_TYPE_BUFFER ||
616 obj->buffer.length < sizeof(*lapic)) {
617 kfree(buffer.pointer);
621 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
623 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
624 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
625 kfree(buffer.pointer);
631 kfree(buffer.pointer);
632 buffer.length = ACPI_ALLOCATE_BUFFER;
633 buffer.pointer = NULL;
635 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
638 if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
641 cpumask_copy(tmp_map, cpu_present_mask);
642 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
645 * If mp_register_lapic successfully generates a new logical cpu
646 * number, then the following will get us exactly what was mapped
648 cpumask_andnot(new_map, cpu_present_mask, tmp_map);
649 if (cpumask_empty(new_map)) {
650 printk ("Unable to map lapic to logical cpu number\n");
655 acpi_processor_set_pdc(handle);
657 cpu = cpumask_first(new_map);
658 acpi_map_cpu2node(handle, cpu, physid);
664 free_cpumask_var(new_map);
666 free_cpumask_var(tmp_map);
671 /* wrapper to silence section mismatch warning */
672 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
674 return _acpi_map_lsapic(handle, pcpu);
676 EXPORT_SYMBOL(acpi_map_lsapic);
678 int acpi_unmap_lsapic(int cpu)
680 per_cpu(x86_cpu_to_apicid, cpu) = -1;
681 set_cpu_present(cpu, false);
687 EXPORT_SYMBOL(acpi_unmap_lsapic);
688 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
690 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
696 EXPORT_SYMBOL(acpi_register_ioapic);
698 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
704 EXPORT_SYMBOL(acpi_unregister_ioapic);
706 static int __init acpi_parse_sbf(struct acpi_table_header *table)
708 struct acpi_table_boot *sb;
710 sb = (struct acpi_table_boot *)table;
712 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
716 sbf_port = sb->cmos_index; /* Save CMOS port */
721 #ifdef CONFIG_HPET_TIMER
722 #include <asm/hpet.h>
724 static struct __initdata resource *hpet_res;
726 static int __init acpi_parse_hpet(struct acpi_table_header *table)
728 struct acpi_table_hpet *hpet_tbl;
730 hpet_tbl = (struct acpi_table_hpet *)table;
732 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
736 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
737 printk(KERN_WARNING PREFIX "HPET timers must be located in "
742 hpet_address = hpet_tbl->address.address;
743 hpet_blockid = hpet_tbl->sequence;
746 * Some broken BIOSes advertise HPET at 0x0. We really do not
747 * want to allocate a resource there.
750 printk(KERN_WARNING PREFIX
751 "HPET id: %#x base: %#lx is invalid\n",
752 hpet_tbl->id, hpet_address);
757 * Some even more broken BIOSes advertise HPET at
758 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
761 if (hpet_address == 0xfed0000000000000UL) {
762 if (!hpet_force_user) {
763 printk(KERN_WARNING PREFIX "HPET id: %#x "
764 "base: 0xfed0000000000000 is bogus\n "
765 "try hpet=force on the kernel command line to "
766 "fix it up to 0xfed00000.\n", hpet_tbl->id);
770 printk(KERN_WARNING PREFIX
771 "HPET id: %#x base: 0xfed0000000000000 fixed up "
772 "to 0xfed00000.\n", hpet_tbl->id);
776 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
777 hpet_tbl->id, hpet_address);
780 * Allocate and initialize the HPET firmware resource for adding into
781 * the resource tree during the lateinit timeframe.
783 #define HPET_RESOURCE_NAME_SIZE 9
784 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
786 hpet_res->name = (void *)&hpet_res[1];
787 hpet_res->flags = IORESOURCE_MEM;
788 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
791 hpet_res->start = hpet_address;
792 hpet_res->end = hpet_address + (1 * 1024) - 1;
798 * hpet_insert_resource inserts the HPET resources used into the resource
801 static __init int hpet_insert_resource(void)
806 return insert_resource(&iomem_resource, hpet_res);
809 late_initcall(hpet_insert_resource);
812 #define acpi_parse_hpet NULL
815 static int __init acpi_parse_fadt(struct acpi_table_header *table)
818 #ifdef CONFIG_X86_PM_TIMER
819 /* detect the location of the ACPI PM Timer */
820 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
822 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
823 ACPI_ADR_SPACE_SYSTEM_IO)
826 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
828 * "X" fields are optional extensions to the original V1.0
829 * fields, so we must selectively expand V1.0 fields if the
830 * corresponding X field is zero.
833 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
836 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
839 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
845 #ifdef CONFIG_X86_LOCAL_APIC
847 * Parse LAPIC entries in MADT
848 * returns 0 on success, < 0 on error
851 static void __init acpi_register_lapic_address(unsigned long address)
853 mp_lapic_addr = address;
855 set_fixmap_nocache(FIX_APIC_BASE, address);
856 if (boot_cpu_physical_apicid == -1U) {
857 boot_cpu_physical_apicid = read_apic_id();
858 apic_version[boot_cpu_physical_apicid] =
859 GET_APIC_VERSION(apic_read(APIC_LVR));
863 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
871 * Note that the LAPIC address is obtained from the MADT (32-bit value)
872 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
876 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
877 acpi_parse_lapic_addr_ovr, 0);
879 printk(KERN_ERR PREFIX
880 "Error parsing LAPIC address override entry\n");
884 acpi_register_lapic_address(acpi_lapic_addr);
889 static int __init acpi_parse_madt_lapic_entries(void)
898 * Note that the LAPIC address is obtained from the MADT (32-bit value)
899 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
903 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
904 acpi_parse_lapic_addr_ovr, 0);
906 printk(KERN_ERR PREFIX
907 "Error parsing LAPIC address override entry\n");
911 acpi_register_lapic_address(acpi_lapic_addr);
913 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
914 acpi_parse_sapic, MAX_APICS);
917 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
918 acpi_parse_x2apic, MAX_APICS);
919 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
920 acpi_parse_lapic, MAX_APICS);
922 if (!count && !x2count) {
923 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
924 /* TBD: Cleanup to allow fallback to MPS */
926 } else if (count < 0 || x2count < 0) {
927 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
928 /* TBD: Cleanup to allow fallback to MPS */
933 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
934 acpi_parse_x2apic_nmi, 0);
936 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
937 if (count < 0 || x2count < 0) {
938 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
939 /* TBD: Cleanup to allow fallback to MPS */
944 #endif /* CONFIG_X86_LOCAL_APIC */
946 #ifdef CONFIG_X86_IO_APIC
949 #ifdef CONFIG_X86_ES7000
950 extern int es7000_plat;
953 static void assign_to_mp_irq(struct mpc_intsrc *m,
954 struct mpc_intsrc *mp_irq)
956 memcpy(mp_irq, m, sizeof(struct mpc_intsrc));
959 static int mp_irq_cmp(struct mpc_intsrc *mp_irq,
960 struct mpc_intsrc *m)
962 return memcmp(mp_irq, m, sizeof(struct mpc_intsrc));
965 static void save_mp_irq(struct mpc_intsrc *m)
969 for (i = 0; i < mp_irq_entries; i++) {
970 if (!mp_irq_cmp(&mp_irqs[i], m))
974 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
975 if (++mp_irq_entries == MAX_IRQ_SOURCES)
976 panic("Max # of irq sources exceeded!!\n");
979 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
983 struct mpc_intsrc mp_irq;
986 * Convert 'gsi' to 'ioapic.pin'.
988 ioapic = mp_find_ioapic(gsi);
991 pin = mp_find_ioapic_pin(ioapic, gsi);
994 * TBD: This check is for faulty timer entries, where the override
995 * erroneously sets the trigger to level, resulting in a HUGE
996 * increase of timer interrupts!
998 if ((bus_irq == 0) && (trigger == 3))
1001 mp_irq.type = MP_INTSRC;
1002 mp_irq.irqtype = mp_INT;
1003 mp_irq.irqflag = (trigger << 2) | polarity;
1004 mp_irq.srcbus = MP_ISA_BUS;
1005 mp_irq.srcbusirq = bus_irq; /* IRQ */
1006 mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */
1007 mp_irq.dstirq = pin; /* INTIN# */
1009 save_mp_irq(&mp_irq);
1011 isa_irq_to_gsi[bus_irq] = gsi;
1014 void __init mp_config_acpi_legacy_irqs(void)
1017 struct mpc_intsrc mp_irq;
1019 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
1021 * Fabricate the legacy ISA bus (bus #31).
1023 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1025 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1026 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1028 #ifdef CONFIG_X86_ES7000
1030 * Older generations of ES7000 have no legacy identity mappings
1032 if (es7000_plat == 1)
1037 * Use the default configuration for the IRQs 0-15. Unless
1038 * overridden by (MADT) interrupt source override entries.
1040 for (i = 0; i < 16; i++) {
1042 unsigned int dstapic;
1046 /* Locate the gsi that irq i maps to. */
1047 if (acpi_isa_irq_to_gsi(i, &gsi))
1051 * Locate the IOAPIC that manages the ISA IRQ.
1053 ioapic = mp_find_ioapic(gsi);
1056 pin = mp_find_ioapic_pin(ioapic, gsi);
1057 dstapic = mp_ioapics[ioapic].apicid;
1059 for (idx = 0; idx < mp_irq_entries; idx++) {
1060 struct mpc_intsrc *irq = mp_irqs + idx;
1062 /* Do we already have a mapping for this ISA IRQ? */
1063 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1066 /* Do we already have a mapping for this IOAPIC pin */
1067 if (irq->dstapic == dstapic && irq->dstirq == pin)
1071 if (idx != mp_irq_entries) {
1072 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1073 continue; /* IRQ already used */
1076 mp_irq.type = MP_INTSRC;
1077 mp_irq.irqflag = 0; /* Conforming */
1078 mp_irq.srcbus = MP_ISA_BUS;
1079 mp_irq.dstapic = dstapic;
1080 mp_irq.irqtype = mp_INT;
1081 mp_irq.srcbusirq = i; /* Identity mapped */
1082 mp_irq.dstirq = pin;
1084 save_mp_irq(&mp_irq);
1088 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1091 #ifdef CONFIG_X86_MPPARSE
1092 struct mpc_intsrc mp_irq;
1093 struct pci_dev *pdev;
1094 unsigned char number;
1103 if (dev->bus != &pci_bus_type)
1106 pdev = to_pci_dev(dev);
1107 number = pdev->bus->number;
1108 devfn = pdev->devfn;
1110 /* print the entry should happen on mptable identically */
1111 mp_irq.type = MP_INTSRC;
1112 mp_irq.irqtype = mp_INT;
1113 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1114 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1115 mp_irq.srcbus = number;
1116 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1117 ioapic = mp_find_ioapic(gsi);
1118 mp_irq.dstapic = mp_ioapics[ioapic].apicid;
1119 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1121 save_mp_irq(&mp_irq);
1126 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1130 struct io_apic_irq_attr irq_attr;
1132 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1135 /* Don't set up the ACPI SCI because it's already set up */
1136 if (acpi_gbl_FADT.sci_interrupt == gsi)
1139 ioapic = mp_find_ioapic(gsi);
1141 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1145 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1147 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1148 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1149 "%d-%d\n", mp_ioapics[ioapic].apicid,
1154 if (enable_update_mptable)
1155 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1157 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1158 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1159 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1160 io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
1166 * Parse IOAPIC related entries in MADT
1167 * returns 0 on success, < 0 on error
1169 static int __init acpi_parse_madt_ioapic_entries(void)
1174 * ACPI interpreter is required to complete interrupt setup,
1175 * so if it is off, don't enumerate the io-apics with ACPI.
1176 * If MPS is present, it will handle them,
1177 * otherwise the system will stay in PIC mode
1179 if (acpi_disabled || acpi_noirq)
1186 * if "noapic" boot option, don't look for IO-APICs
1188 if (skip_ioapic_setup) {
1189 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1190 "due to 'noapic' option.\n");
1195 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1198 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1200 } else if (count < 0) {
1201 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1206 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1209 printk(KERN_ERR PREFIX
1210 "Error parsing interrupt source overrides entry\n");
1211 /* TBD: Cleanup to allow fallback to MPS */
1216 * If BIOS did not supply an INT_SRC_OVR for the SCI
1217 * pretend we got one so we can set the SCI flags.
1219 if (!acpi_sci_override_gsi)
1220 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1221 acpi_gbl_FADT.sci_interrupt);
1223 /* Fill in identity legacy mappings where no override */
1224 mp_config_acpi_legacy_irqs();
1227 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1230 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1231 /* TBD: Cleanup to allow fallback to MPS */
1238 static inline int acpi_parse_madt_ioapic_entries(void)
1242 #endif /* !CONFIG_X86_IO_APIC */
1244 static void __init early_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 = early_acpi_parse_madt_lapic_addr_ovr();
1257 smp_found_config = 1;
1259 if (error == -EINVAL) {
1261 * Dell Precision Workstation 410, 610 come here.
1263 printk(KERN_ERR PREFIX
1264 "Invalid BIOS MADT, disabling ACPI\n");
1271 static void __init acpi_process_madt(void)
1273 #ifdef CONFIG_X86_LOCAL_APIC
1276 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1279 * Parse MADT LAPIC entries
1281 error = acpi_parse_madt_lapic_entries();
1286 * Parse MADT IO-APIC entries
1288 error = acpi_parse_madt_ioapic_entries();
1290 acpi_set_irq_model_ioapic();
1292 smp_found_config = 1;
1295 if (error == -EINVAL) {
1297 * Dell Precision Workstation 410, 610 come here.
1299 printk(KERN_ERR PREFIX
1300 "Invalid BIOS MADT, disabling ACPI\n");
1305 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1306 * In the event an MPS table was found, forget it.
1307 * Boot with "acpi=off" to use MPS on such a system.
1309 if (smp_found_config) {
1310 printk(KERN_WARNING PREFIX
1311 "No APIC-table, disabling MPS\n");
1312 smp_found_config = 0;
1317 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1318 * processors, where MPS only supports physical.
1320 if (acpi_lapic && acpi_ioapic)
1321 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1323 else if (acpi_lapic)
1324 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1325 "configuration information\n");
1330 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1333 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1340 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1343 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1350 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1353 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1357 "Warning: DMI blacklist says broken, but acpi forced\n");
1363 * Force ignoring BIOS IRQ0 pin2 override
1365 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1368 * The ati_ixp4x0_rev() early PCI quirk should have set
1369 * the acpi_skip_timer_override flag already:
1371 if (!acpi_skip_timer_override) {
1372 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1373 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1375 acpi_skip_timer_override = 1;
1381 * If your system is blacklisted here, but you find that acpi=force
1382 * works for you, please contact linux-acpi@vger.kernel.org
1384 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1386 * Boxes that need ACPI disabled
1389 .callback = dmi_disable_acpi,
1390 .ident = "IBM Thinkpad",
1392 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1393 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1398 * Boxes that need ACPI PCI IRQ routing disabled
1401 .callback = disable_acpi_irq,
1402 .ident = "ASUS A7V",
1404 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1405 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1406 /* newer BIOS, Revision 1011, does work */
1407 DMI_MATCH(DMI_BIOS_VERSION,
1408 "ASUS A7V ACPI BIOS Revision 1007"),
1413 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1414 * for LPC bridge, which is needed for the PCI
1415 * interrupt links to work. DSDT fix is in bug 5966.
1416 * 2645, 2646 model numbers are shared with 600/600E/600X
1418 .callback = disable_acpi_irq,
1419 .ident = "IBM Thinkpad 600 Series 2645",
1421 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1422 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1426 .callback = disable_acpi_irq,
1427 .ident = "IBM Thinkpad 600 Series 2646",
1429 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1430 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1434 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1437 .callback = disable_acpi_pci,
1438 .ident = "ASUS PR-DLS",
1440 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1441 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1442 DMI_MATCH(DMI_BIOS_VERSION,
1443 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1444 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1448 .callback = disable_acpi_pci,
1449 .ident = "Acer TravelMate 36x Laptop",
1451 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1452 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1458 /* second table for DMI checks that should run after early-quirks */
1459 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1461 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1462 * which includes some code which overrides all temperature
1463 * trip points to 16C if the INTIN2 input of the I/O APIC
1464 * is enabled. This input is incorrectly designated the
1465 * ISA IRQ 0 via an interrupt source override even though
1466 * it is wired to the output of the master 8259A and INTIN0
1467 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1468 * override in that cases.
1471 .callback = dmi_ignore_irq0_timer_override,
1472 .ident = "HP nx6115 laptop",
1474 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1475 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1479 .callback = dmi_ignore_irq0_timer_override,
1480 .ident = "HP NX6125 laptop",
1482 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1483 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1487 .callback = dmi_ignore_irq0_timer_override,
1488 .ident = "HP NX6325 laptop",
1490 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1491 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1495 .callback = dmi_ignore_irq0_timer_override,
1496 .ident = "HP 6715b laptop",
1498 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1499 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1506 * acpi_boot_table_init() and acpi_boot_init()
1507 * called from setup_arch(), always.
1508 * 1. checksums all tables
1509 * 2. enumerates lapics
1510 * 3. enumerates io-apics
1512 * acpi_table_init() is separate to allow reading SRAT without
1513 * other side effects.
1515 * side effects of acpi_boot_init:
1516 * acpi_lapic = 1 if LAPIC found
1517 * acpi_ioapic = 1 if IOAPIC found
1518 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1519 * if acpi_blacklisted() acpi_disabled = 1;
1520 * acpi_irq_model=...
1524 void __init acpi_boot_table_init(void)
1526 dmi_check_system(acpi_dmi_table);
1529 * If acpi_disabled, bail out
1535 * Initialize the ACPI boot-time table parser.
1537 if (acpi_table_init()) {
1542 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1545 * blacklist may disable ACPI entirely
1547 if (acpi_blacklisted()) {
1549 printk(KERN_WARNING PREFIX "acpi=force override\n");
1551 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1558 int __init early_acpi_boot_init(void)
1561 * If acpi_disabled, bail out
1567 * Process the Multiple APIC Description Table (MADT), if present
1569 early_acpi_process_madt();
1574 int __init acpi_boot_init(void)
1576 /* those are executed after early-quirks are executed */
1577 dmi_check_system(acpi_dmi_table_late);
1580 * If acpi_disabled, bail out
1585 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1588 * set sci_int and PM timer address
1590 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1593 * Process the Multiple APIC Description Table (MADT), if present
1595 acpi_process_madt();
1597 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1600 x86_init.pci.init = pci_acpi_init;
1605 static int __init parse_acpi(char *arg)
1610 /* "acpi=off" disables both ACPI table parsing and interpreter */
1611 if (strcmp(arg, "off") == 0) {
1614 /* acpi=force to over-ride black-list */
1615 else if (strcmp(arg, "force") == 0) {
1619 /* acpi=strict disables out-of-spec workarounds */
1620 else if (strcmp(arg, "strict") == 0) {
1623 /* acpi=rsdt use RSDT instead of XSDT */
1624 else if (strcmp(arg, "rsdt") == 0) {
1625 acpi_rsdt_forced = 1;
1627 /* "acpi=noirq" disables ACPI interrupt routing */
1628 else if (strcmp(arg, "noirq") == 0) {
1631 /* "acpi=copy_dsdt" copys DSDT */
1632 else if (strcmp(arg, "copy_dsdt") == 0) {
1633 acpi_gbl_copy_dsdt_locally = 1;
1635 /* Core will printk when we return error. */
1640 early_param("acpi", parse_acpi);
1642 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1643 static int __init parse_pci(char *arg)
1645 if (arg && strcmp(arg, "noacpi") == 0)
1649 early_param("pci", parse_pci);
1651 int __init acpi_mps_check(void)
1653 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1654 /* mptable code is not built-in*/
1655 if (acpi_disabled || acpi_noirq) {
1656 printk(KERN_WARNING "MPS support code is not built-in.\n"
1657 "Using acpi=off or acpi=noirq or pci=noacpi "
1658 "may have problem\n");
1665 #ifdef CONFIG_X86_IO_APIC
1666 static int __init parse_acpi_skip_timer_override(char *arg)
1668 acpi_skip_timer_override = 1;
1671 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1673 static int __init parse_acpi_use_timer_override(char *arg)
1675 acpi_use_timer_override = 1;
1678 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1679 #endif /* CONFIG_X86_IO_APIC */
1681 static int __init setup_acpi_sci(char *s)
1685 if (!strcmp(s, "edge"))
1686 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1687 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1688 else if (!strcmp(s, "level"))
1689 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1690 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1691 else if (!strcmp(s, "high"))
1692 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1693 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1694 else if (!strcmp(s, "low"))
1695 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1696 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1701 early_param("acpi_sci", setup_acpi_sci);
1703 int __acpi_acquire_global_lock(unsigned int *lock)
1705 unsigned int old, new, val;
1708 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1709 val = cmpxchg(lock, old, new);
1710 } while (unlikely (val != old));
1711 return (new < 3) ? -1 : 0;
1714 int __acpi_release_global_lock(unsigned int *lock)
1716 unsigned int old, new, val;
1720 val = cmpxchg(lock, old, new);
1721 } while (unlikely (val != old));