Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * acpi_tables.c - ACPI Boot-Time Table Parsing |
| 3 | * |
| 4 | * Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
| 5 | * |
| 6 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | * |
| 22 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 23 | * |
| 24 | */ |
| 25 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/init.h> |
| 27 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/smp.h> |
| 29 | #include <linux/string.h> |
| 30 | #include <linux/types.h> |
| 31 | #include <linux/irq.h> |
| 32 | #include <linux/errno.h> |
| 33 | #include <linux/acpi.h> |
| 34 | #include <linux/bootmem.h> |
| 35 | |
| 36 | #define PREFIX "ACPI: " |
| 37 | |
Len Brown | 04348e6 | 2005-12-30 02:44:59 -0500 | [diff] [blame] | 38 | #define ACPI_MAX_TABLES 128 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" }; |
| 41 | static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" }; |
| 42 | |
Alexey Starikovskiy | ad71860 | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 43 | static struct acpi_table_desc initial_tables[ACPI_MAX_TABLES] __initdata; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
Len Brown | 4e381a4 | 2007-03-30 14:16:10 -0400 | [diff] [blame] | 45 | static int acpi_apic_instance __initdata; |
Len Brown | a1fdcc0 | 2007-03-11 03:26:14 -0400 | [diff] [blame] | 46 | |
| 47 | void acpi_table_print_madt_entry(struct acpi_subtable_header *header) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | { |
| 49 | if (!header) |
| 50 | return; |
| 51 | |
| 52 | switch (header->type) { |
| 53 | |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 54 | case ACPI_MADT_TYPE_LOCAL_APIC: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 55 | { |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 56 | struct acpi_madt_local_apic *p = |
| 57 | (struct acpi_madt_local_apic *)header; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 58 | printk(KERN_INFO PREFIX |
| 59 | "LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n", |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 60 | p->processor_id, p->id, |
| 61 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 62 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | break; |
| 64 | |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 65 | case ACPI_MADT_TYPE_IO_APIC: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 66 | { |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 67 | struct acpi_madt_io_apic *p = |
| 68 | (struct acpi_madt_io_apic *)header; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 69 | printk(KERN_INFO PREFIX |
| 70 | "IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n", |
| 71 | p->id, p->address, p->global_irq_base); |
| 72 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | break; |
| 74 | |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 75 | case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 76 | { |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 77 | struct acpi_madt_interrupt_override *p = |
| 78 | (struct acpi_madt_interrupt_override *)header; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 79 | printk(KERN_INFO PREFIX |
| 80 | "INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n", |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 81 | p->bus, p->source_irq, p->global_irq, |
| 82 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], |
| 83 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2]); |
| 84 | if (p->inti_flags & |
| 85 | ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK)) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 86 | printk(KERN_INFO PREFIX |
| 87 | "INT_SRC_OVR unexpected reserved flags: 0x%x\n", |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 88 | p->inti_flags & |
| 89 | ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 91 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | break; |
| 93 | |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 94 | case ACPI_MADT_TYPE_NMI_SOURCE: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 95 | { |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 96 | struct acpi_madt_nmi_source *p = |
| 97 | (struct acpi_madt_nmi_source *)header; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 98 | printk(KERN_INFO PREFIX |
| 99 | "NMI_SRC (%s %s global_irq %d)\n", |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 100 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], |
| 101 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 102 | p->global_irq); |
| 103 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | break; |
| 105 | |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 106 | case ACPI_MADT_TYPE_LOCAL_APIC_NMI: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 107 | { |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 108 | struct acpi_madt_local_apic_nmi *p = |
| 109 | (struct acpi_madt_local_apic_nmi *)header; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 110 | printk(KERN_INFO PREFIX |
| 111 | "LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n", |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 112 | p->processor_id, |
| 113 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK ], |
| 114 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 115 | p->lint); |
| 116 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | break; |
| 118 | |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 119 | case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 120 | { |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 121 | struct acpi_madt_local_apic_override *p = |
| 122 | (struct acpi_madt_local_apic_override *)header; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 123 | printk(KERN_INFO PREFIX |
| 124 | "LAPIC_ADDR_OVR (address[%p])\n", |
| 125 | (void *)(unsigned long)p->address); |
| 126 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | break; |
| 128 | |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 129 | case ACPI_MADT_TYPE_IO_SAPIC: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 130 | { |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 131 | struct acpi_madt_io_sapic *p = |
| 132 | (struct acpi_madt_io_sapic *)header; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 133 | printk(KERN_INFO PREFIX |
| 134 | "IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n", |
| 135 | p->id, (void *)(unsigned long)p->address, |
| 136 | p->global_irq_base); |
| 137 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | break; |
| 139 | |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 140 | case ACPI_MADT_TYPE_LOCAL_SAPIC: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 141 | { |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 142 | struct acpi_madt_local_sapic *p = |
| 143 | (struct acpi_madt_local_sapic *)header; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 144 | printk(KERN_INFO PREFIX |
| 145 | "LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n", |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 146 | p->processor_id, p->id, p->eid, |
| 147 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 148 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | break; |
| 150 | |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 151 | case ACPI_MADT_TYPE_INTERRUPT_SOURCE: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 152 | { |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 153 | struct acpi_madt_interrupt_source *p = |
| 154 | (struct acpi_madt_interrupt_source *)header; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 155 | printk(KERN_INFO PREFIX |
| 156 | "PLAT_INT_SRC (%s %s type[0x%x] id[0x%04x] eid[0x%x] iosapic_vector[0x%x] global_irq[0x%x]\n", |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 157 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], |
| 158 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], |
| 159 | p->type, p->id, p->eid, p->io_sapic_vector, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 160 | p->global_irq); |
| 161 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | break; |
| 163 | |
| 164 | default: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 165 | printk(KERN_WARNING PREFIX |
| 166 | "Found unsupported MADT entry (type = 0x%x)\n", |
| 167 | header->type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | break; |
| 169 | } |
| 170 | } |
| 171 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | |
| 173 | int __init |
Len Brown | 6eb87fe | 2007-02-10 22:17:07 -0500 | [diff] [blame] | 174 | acpi_table_parse_entries(char *id, |
| 175 | unsigned long table_size, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 176 | int entry_id, |
Len Brown | 5a8765a | 2007-02-10 21:35:47 -0500 | [diff] [blame] | 177 | acpi_table_entry_handler handler, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 178 | unsigned int max_entries) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | { |
Len Brown | 6eb87fe | 2007-02-10 22:17:07 -0500 | [diff] [blame] | 180 | struct acpi_table_header *table_header = NULL; |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 181 | struct acpi_subtable_header *entry; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 182 | unsigned int count = 0; |
Len Brown | 6eb87fe | 2007-02-10 22:17:07 -0500 | [diff] [blame] | 183 | unsigned long table_end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | |
| 185 | if (!handler) |
| 186 | return -EINVAL; |
| 187 | |
Len Brown | a1fdcc0 | 2007-03-11 03:26:14 -0400 | [diff] [blame] | 188 | if (strncmp(id, ACPI_SIG_MADT, 4) == 0) |
| 189 | acpi_get_table(id, acpi_apic_instance, &table_header); |
| 190 | else |
| 191 | acpi_get_table(id, 0, &table_header); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | |
Len Brown | 6eb87fe | 2007-02-10 22:17:07 -0500 | [diff] [blame] | 193 | if (!table_header) { |
Alexey Starikovskiy | ceb6c46 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 194 | printk(KERN_WARNING PREFIX "%4.4s not present\n", id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | return -ENODEV; |
| 196 | } |
| 197 | |
Len Brown | 6eb87fe | 2007-02-10 22:17:07 -0500 | [diff] [blame] | 198 | table_end = (unsigned long)table_header + table_header->length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | |
| 200 | /* Parse all entries looking for a match. */ |
| 201 | |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 202 | entry = (struct acpi_subtable_header *) |
Len Brown | 6eb87fe | 2007-02-10 22:17:07 -0500 | [diff] [blame] | 203 | ((unsigned long)table_header + table_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 205 | while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) < |
Len Brown | 6eb87fe | 2007-02-10 22:17:07 -0500 | [diff] [blame] | 206 | table_end) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 207 | if (entry->type == entry_id |
| 208 | && (!max_entries || count++ < max_entries)) |
Len Brown | 6eb87fe | 2007-02-10 22:17:07 -0500 | [diff] [blame] | 209 | if (handler(entry, table_end)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | return -EINVAL; |
| 211 | |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 212 | entry = (struct acpi_subtable_header *) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 213 | ((unsigned long)entry + entry->length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | } |
| 215 | if (max_entries && count > max_entries) { |
Alexey Starikovskiy | ceb6c46 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 216 | printk(KERN_WARNING PREFIX "[%4.4s:0x%02x] ignored %i entries of " |
| 217 | "%i found\n", id, entry_id, count - max_entries, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | return count; |
| 221 | } |
| 222 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | int __init |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 224 | acpi_table_parse_madt(enum acpi_madt_type id, |
Len Brown | 5a8765a | 2007-02-10 21:35:47 -0500 | [diff] [blame] | 225 | acpi_table_entry_handler handler, unsigned int max_entries) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | { |
Len Brown | 6eb87fe | 2007-02-10 22:17:07 -0500 | [diff] [blame] | 227 | return acpi_table_parse_entries(ACPI_SIG_MADT, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 228 | sizeof(struct acpi_table_madt), id, |
| 229 | handler, max_entries); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | } |
| 231 | |
Len Brown | 7f8f97c | 2007-02-10 21:28:03 -0500 | [diff] [blame] | 232 | /** |
| 233 | * acpi_table_parse - find table with @id, run @handler on it |
| 234 | * |
| 235 | * @id: table id to find |
| 236 | * @handler: handler to run |
| 237 | * |
| 238 | * Scan the ACPI System Descriptor Table (STD) for a table matching @id, |
| 239 | * run @handler on it. Return 0 if table found, return on if not. |
| 240 | */ |
Alexey Starikovskiy | ceb6c46 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 241 | int __init acpi_table_parse(char *id, acpi_table_handler handler) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | { |
Alexey Starikovskiy | ceb6c46 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 243 | struct acpi_table_header *table = NULL; |
Len Brown | a1fdcc0 | 2007-03-11 03:26:14 -0400 | [diff] [blame] | 244 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | if (!handler) |
| 246 | return -EINVAL; |
| 247 | |
Len Brown | a1fdcc0 | 2007-03-11 03:26:14 -0400 | [diff] [blame] | 248 | if (strncmp(id, ACPI_SIG_MADT, 4) == 0) |
| 249 | acpi_get_table(id, acpi_apic_instance, &table); |
| 250 | else |
| 251 | acpi_get_table(id, 0, &table); |
| 252 | |
Alexey Starikovskiy | ceb6c46 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 253 | if (table) { |
| 254 | handler(table); |
Alexey Starikovskiy | ceb6c46 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 255 | return 0; |
Len Brown | 7f8f97c | 2007-02-10 21:28:03 -0500 | [diff] [blame] | 256 | } else |
| 257 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | } |
| 259 | |
Len Brown | a1fdcc0 | 2007-03-11 03:26:14 -0400 | [diff] [blame] | 260 | /* |
| 261 | * The BIOS is supposed to supply a single APIC/MADT, |
| 262 | * but some report two. Provide a knob to use either. |
| 263 | * (don't you wish instance 0 and 1 were not the same?) |
| 264 | */ |
| 265 | static void __init check_multiple_madt(void) |
| 266 | { |
| 267 | struct acpi_table_header *table = NULL; |
| 268 | |
| 269 | acpi_get_table(ACPI_SIG_MADT, 2, &table); |
| 270 | if (table) { |
| 271 | printk(KERN_WARNING PREFIX |
| 272 | "BIOS bug: multiple APIC/MADT found," |
| 273 | " using %d\n", acpi_apic_instance); |
| 274 | printk(KERN_WARNING PREFIX |
| 275 | "If \"acpi_apic_instance=%d\" works better, " |
| 276 | "notify linux-acpi@vger.kernel.org\n", |
| 277 | acpi_apic_instance ? 0 : 2); |
| 278 | |
| 279 | } else |
| 280 | acpi_apic_instance = 0; |
| 281 | |
| 282 | return; |
| 283 | } |
| 284 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | /* |
| 286 | * acpi_table_init() |
| 287 | * |
| 288 | * find RSDP, find and checksum SDT/XSDT. |
| 289 | * checksum all tables, print SDT/XSDT |
Alexey Starikovskiy | 5f3b1a8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 290 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | * result: sdt_entry[] is initialized |
| 292 | */ |
| 293 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 294 | int __init acpi_table_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | { |
Len Brown | 9e3a9d1 | 2009-02-06 14:00:56 -0500 | [diff] [blame^] | 296 | acpi_status status; |
| 297 | |
| 298 | status = acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0); |
| 299 | if (ACPI_FAILURE(status)) |
| 300 | return 1; |
| 301 | |
Len Brown | a1fdcc0 | 2007-03-11 03:26:14 -0400 | [diff] [blame] | 302 | check_multiple_madt(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | return 0; |
| 304 | } |
Len Brown | a1fdcc0 | 2007-03-11 03:26:14 -0400 | [diff] [blame] | 305 | |
| 306 | static int __init acpi_parse_apic_instance(char *str) |
| 307 | { |
Cyrill Gorcunov | f0df2d6 | 2008-08-20 16:41:45 -0700 | [diff] [blame] | 308 | if (!str) |
| 309 | return -EINVAL; |
Len Brown | a1fdcc0 | 2007-03-11 03:26:14 -0400 | [diff] [blame] | 310 | |
| 311 | acpi_apic_instance = simple_strtoul(str, NULL, 0); |
| 312 | |
| 313 | printk(KERN_NOTICE PREFIX "Shall use APIC/MADT table %d\n", |
| 314 | acpi_apic_instance); |
| 315 | |
| 316 | return 0; |
| 317 | } |
| 318 | |
| 319 | early_param("acpi_apic_instance", acpi_parse_apic_instance); |