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 | |
| 26 | #include <linux/config.h> |
| 27 | #include <linux/init.h> |
| 28 | #include <linux/kernel.h> |
| 29 | #include <linux/sched.h> |
| 30 | #include <linux/smp.h> |
| 31 | #include <linux/string.h> |
| 32 | #include <linux/types.h> |
| 33 | #include <linux/irq.h> |
| 34 | #include <linux/errno.h> |
| 35 | #include <linux/acpi.h> |
| 36 | #include <linux/bootmem.h> |
| 37 | |
| 38 | #define PREFIX "ACPI: " |
| 39 | |
Len Brown | 04348e6 | 2005-12-30 02:44:59 -0500 | [diff] [blame^] | 40 | #define ACPI_MAX_TABLES 128 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
| 42 | static char *acpi_table_signatures[ACPI_TABLE_COUNT] = { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 43 | [ACPI_TABLE_UNKNOWN] = "????", |
| 44 | [ACPI_APIC] = "APIC", |
| 45 | [ACPI_BOOT] = "BOOT", |
| 46 | [ACPI_DBGP] = "DBGP", |
| 47 | [ACPI_DSDT] = "DSDT", |
| 48 | [ACPI_ECDT] = "ECDT", |
| 49 | [ACPI_ETDT] = "ETDT", |
| 50 | [ACPI_FADT] = "FACP", |
| 51 | [ACPI_FACS] = "FACS", |
| 52 | [ACPI_OEMX] = "OEM", |
| 53 | [ACPI_PSDT] = "PSDT", |
| 54 | [ACPI_SBST] = "SBST", |
| 55 | [ACPI_SLIT] = "SLIT", |
| 56 | [ACPI_SPCR] = "SPCR", |
| 57 | [ACPI_SRAT] = "SRAT", |
| 58 | [ACPI_SSDT] = "SSDT", |
| 59 | [ACPI_SPMI] = "SPMI", |
| 60 | [ACPI_HPET] = "HPET", |
| 61 | [ACPI_MCFG] = "MCFG", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | }; |
| 63 | |
| 64 | static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" }; |
| 65 | static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" }; |
| 66 | |
| 67 | /* System Description Table (RSDT/XSDT) */ |
| 68 | struct acpi_table_sdt { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 69 | unsigned long pa; |
| 70 | enum acpi_table_id id; |
| 71 | unsigned long size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | } __attribute__ ((packed)); |
| 73 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 74 | static unsigned long sdt_pa; /* Physical Address */ |
| 75 | static unsigned long sdt_count; /* Table count */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
Len Brown | 04348e6 | 2005-12-30 02:44:59 -0500 | [diff] [blame^] | 77 | static struct acpi_table_sdt sdt_entry[ACPI_MAX_TABLES] __initdata; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 79 | void acpi_table_print(struct acpi_table_header *header, unsigned long phys_addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 81 | char *name = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | |
| 83 | if (!header) |
| 84 | return; |
| 85 | |
| 86 | /* Some table signatures aren't good table names */ |
| 87 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 88 | if (!strncmp((char *)&header->signature, |
| 89 | acpi_table_signatures[ACPI_APIC], |
| 90 | sizeof(header->signature))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | name = "MADT"; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 92 | } else if (!strncmp((char *)&header->signature, |
| 93 | acpi_table_signatures[ACPI_FADT], |
| 94 | sizeof(header->signature))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | name = "FADT"; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 96 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | name = header->signature; |
| 98 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 99 | printk(KERN_DEBUG PREFIX |
| 100 | "%.4s (v%3.3d %6.6s %8.8s 0x%08x %.4s 0x%08x) @ 0x%p\n", name, |
| 101 | header->revision, header->oem_id, header->oem_table_id, |
| 102 | header->oem_revision, header->asl_compiler_id, |
| 103 | header->asl_compiler_revision, (void *)phys_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | } |
| 105 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 106 | void acpi_table_print_madt_entry(acpi_table_entry_header * header) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | { |
| 108 | if (!header) |
| 109 | return; |
| 110 | |
| 111 | switch (header->type) { |
| 112 | |
| 113 | case ACPI_MADT_LAPIC: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 114 | { |
| 115 | struct acpi_table_lapic *p = |
| 116 | (struct acpi_table_lapic *)header; |
| 117 | printk(KERN_INFO PREFIX |
| 118 | "LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n", |
| 119 | p->acpi_id, p->id, |
| 120 | p->flags.enabled ? "enabled" : "disabled"); |
| 121 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | break; |
| 123 | |
| 124 | case ACPI_MADT_IOAPIC: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 125 | { |
| 126 | struct acpi_table_ioapic *p = |
| 127 | (struct acpi_table_ioapic *)header; |
| 128 | printk(KERN_INFO PREFIX |
| 129 | "IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n", |
| 130 | p->id, p->address, p->global_irq_base); |
| 131 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | break; |
| 133 | |
| 134 | case ACPI_MADT_INT_SRC_OVR: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 135 | { |
| 136 | struct acpi_table_int_src_ovr *p = |
| 137 | (struct acpi_table_int_src_ovr *)header; |
| 138 | printk(KERN_INFO PREFIX |
| 139 | "INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n", |
| 140 | p->bus, p->bus_irq, p->global_irq, |
| 141 | mps_inti_flags_polarity[p->flags.polarity], |
| 142 | mps_inti_flags_trigger[p->flags.trigger]); |
| 143 | if (p->flags.reserved) |
| 144 | printk(KERN_INFO PREFIX |
| 145 | "INT_SRC_OVR unexpected reserved flags: 0x%x\n", |
| 146 | p->flags.reserved); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
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 | |
| 151 | case ACPI_MADT_NMI_SRC: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 152 | { |
| 153 | struct acpi_table_nmi_src *p = |
| 154 | (struct acpi_table_nmi_src *)header; |
| 155 | printk(KERN_INFO PREFIX |
| 156 | "NMI_SRC (%s %s global_irq %d)\n", |
| 157 | mps_inti_flags_polarity[p->flags.polarity], |
| 158 | mps_inti_flags_trigger[p->flags.trigger], |
| 159 | p->global_irq); |
| 160 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | break; |
| 162 | |
| 163 | case ACPI_MADT_LAPIC_NMI: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 164 | { |
| 165 | struct acpi_table_lapic_nmi *p = |
| 166 | (struct acpi_table_lapic_nmi *)header; |
| 167 | printk(KERN_INFO PREFIX |
| 168 | "LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n", |
| 169 | p->acpi_id, |
| 170 | mps_inti_flags_polarity[p->flags.polarity], |
| 171 | mps_inti_flags_trigger[p->flags.trigger], |
| 172 | p->lint); |
| 173 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | break; |
| 175 | |
| 176 | case ACPI_MADT_LAPIC_ADDR_OVR: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 177 | { |
| 178 | struct acpi_table_lapic_addr_ovr *p = |
| 179 | (struct acpi_table_lapic_addr_ovr *)header; |
| 180 | printk(KERN_INFO PREFIX |
| 181 | "LAPIC_ADDR_OVR (address[%p])\n", |
| 182 | (void *)(unsigned long)p->address); |
| 183 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | break; |
| 185 | |
| 186 | case ACPI_MADT_IOSAPIC: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 187 | { |
| 188 | struct acpi_table_iosapic *p = |
| 189 | (struct acpi_table_iosapic *)header; |
| 190 | printk(KERN_INFO PREFIX |
| 191 | "IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n", |
| 192 | p->id, (void *)(unsigned long)p->address, |
| 193 | p->global_irq_base); |
| 194 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | break; |
| 196 | |
| 197 | case ACPI_MADT_LSAPIC: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 198 | { |
| 199 | struct acpi_table_lsapic *p = |
| 200 | (struct acpi_table_lsapic *)header; |
| 201 | printk(KERN_INFO PREFIX |
| 202 | "LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n", |
| 203 | p->acpi_id, p->id, p->eid, |
| 204 | p->flags.enabled ? "enabled" : "disabled"); |
| 205 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | break; |
| 207 | |
| 208 | case ACPI_MADT_PLAT_INT_SRC: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 209 | { |
| 210 | struct acpi_table_plat_int_src *p = |
| 211 | (struct acpi_table_plat_int_src *)header; |
| 212 | printk(KERN_INFO PREFIX |
| 213 | "PLAT_INT_SRC (%s %s type[0x%x] id[0x%04x] eid[0x%x] iosapic_vector[0x%x] global_irq[0x%x]\n", |
| 214 | mps_inti_flags_polarity[p->flags.polarity], |
| 215 | mps_inti_flags_trigger[p->flags.trigger], |
| 216 | p->type, p->id, p->eid, p->iosapic_vector, |
| 217 | p->global_irq); |
| 218 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | break; |
| 220 | |
| 221 | default: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 222 | printk(KERN_WARNING PREFIX |
| 223 | "Found unsupported MADT entry (type = 0x%x)\n", |
| 224 | header->type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | break; |
| 226 | } |
| 227 | } |
| 228 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | static int |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 230 | acpi_table_compute_checksum(void *table_pointer, unsigned long length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 232 | u8 *p = (u8 *) table_pointer; |
| 233 | unsigned long remains = length; |
| 234 | unsigned long sum = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | |
| 236 | if (!p || !length) |
| 237 | return -EINVAL; |
| 238 | |
| 239 | while (remains--) |
| 240 | sum += *p++; |
| 241 | |
| 242 | return (sum & 0xFF); |
| 243 | } |
| 244 | |
| 245 | /* |
| 246 | * acpi_get_table_header_early() |
| 247 | * for acpi_blacklisted(), acpi_table_get_sdt() |
| 248 | */ |
| 249 | int __init |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 250 | acpi_get_table_header_early(enum acpi_table_id id, |
| 251 | struct acpi_table_header **header) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | { |
| 253 | unsigned int i; |
| 254 | enum acpi_table_id temp_id; |
| 255 | |
| 256 | /* DSDT is different from the rest */ |
| 257 | if (id == ACPI_DSDT) |
| 258 | temp_id = ACPI_FADT; |
| 259 | else |
| 260 | temp_id = id; |
| 261 | |
| 262 | /* Locate the table. */ |
| 263 | |
| 264 | for (i = 0; i < sdt_count; i++) { |
| 265 | if (sdt_entry[i].id != temp_id) |
| 266 | continue; |
| 267 | *header = (void *) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 268 | __acpi_map_table(sdt_entry[i].pa, sdt_entry[i].size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | if (!*header) { |
| 270 | printk(KERN_WARNING PREFIX "Unable to map %s\n", |
| 271 | acpi_table_signatures[temp_id]); |
| 272 | return -ENODEV; |
| 273 | } |
| 274 | break; |
| 275 | } |
| 276 | |
| 277 | if (!*header) { |
| 278 | printk(KERN_WARNING PREFIX "%s not present\n", |
| 279 | acpi_table_signatures[id]); |
| 280 | return -ENODEV; |
| 281 | } |
| 282 | |
| 283 | /* Map the DSDT header via the pointer in the FADT */ |
| 284 | if (id == ACPI_DSDT) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 285 | struct fadt_descriptor_rev2 *fadt = |
| 286 | (struct fadt_descriptor_rev2 *)*header; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | |
| 288 | if (fadt->revision == 3 && fadt->Xdsdt) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 289 | *header = (void *)__acpi_map_table(fadt->Xdsdt, |
| 290 | sizeof(struct |
| 291 | acpi_table_header)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | } else if (fadt->V1_dsdt) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 293 | *header = (void *)__acpi_map_table(fadt->V1_dsdt, |
| 294 | sizeof(struct |
| 295 | acpi_table_header)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | } else |
| 297 | *header = NULL; |
| 298 | |
| 299 | if (!*header) { |
| 300 | printk(KERN_WARNING PREFIX "Unable to map DSDT\n"); |
| 301 | return -ENODEV; |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | return 0; |
| 306 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | |
| 308 | int __init |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 309 | acpi_table_parse_madt_family(enum acpi_table_id id, |
| 310 | unsigned long madt_size, |
| 311 | int entry_id, |
| 312 | acpi_madt_entry_handler handler, |
| 313 | unsigned int max_entries) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 315 | void *madt = NULL; |
| 316 | acpi_table_entry_header *entry; |
| 317 | unsigned int count = 0; |
| 318 | unsigned long madt_end; |
| 319 | unsigned int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | |
| 321 | if (!handler) |
| 322 | return -EINVAL; |
| 323 | |
| 324 | /* Locate the MADT (if exists). There should only be one. */ |
| 325 | |
| 326 | for (i = 0; i < sdt_count; i++) { |
| 327 | if (sdt_entry[i].id != id) |
| 328 | continue; |
| 329 | madt = (void *) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 330 | __acpi_map_table(sdt_entry[i].pa, sdt_entry[i].size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | if (!madt) { |
| 332 | printk(KERN_WARNING PREFIX "Unable to map %s\n", |
| 333 | acpi_table_signatures[id]); |
| 334 | return -ENODEV; |
| 335 | } |
| 336 | break; |
| 337 | } |
| 338 | |
| 339 | if (!madt) { |
| 340 | printk(KERN_WARNING PREFIX "%s not present\n", |
| 341 | acpi_table_signatures[id]); |
| 342 | return -ENODEV; |
| 343 | } |
| 344 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 345 | madt_end = (unsigned long)madt + sdt_entry[i].size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | |
| 347 | /* Parse all entries looking for a match. */ |
| 348 | |
| 349 | entry = (acpi_table_entry_header *) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 350 | ((unsigned long)madt + madt_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 352 | while (((unsigned long)entry) + sizeof(acpi_table_entry_header) < |
| 353 | madt_end) { |
| 354 | if (entry->type == entry_id |
| 355 | && (!max_entries || count++ < max_entries)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | if (handler(entry, madt_end)) |
| 357 | return -EINVAL; |
| 358 | |
| 359 | entry = (acpi_table_entry_header *) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 360 | ((unsigned long)entry + entry->length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | } |
| 362 | if (max_entries && count > max_entries) { |
| 363 | printk(KERN_WARNING PREFIX "[%s:0x%02x] ignored %i entries of " |
| 364 | "%i found\n", acpi_table_signatures[id], entry_id, |
| 365 | count - max_entries, count); |
| 366 | } |
| 367 | |
| 368 | return count; |
| 369 | } |
| 370 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | int __init |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 372 | acpi_table_parse_madt(enum acpi_madt_entry_id id, |
| 373 | acpi_madt_entry_handler handler, unsigned int max_entries) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 375 | return acpi_table_parse_madt_family(ACPI_APIC, |
| 376 | sizeof(struct acpi_table_madt), id, |
| 377 | handler, max_entries); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | } |
| 379 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 380 | int __init acpi_table_parse(enum acpi_table_id id, acpi_table_handler handler) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 382 | int count = 0; |
| 383 | unsigned int i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | |
| 385 | if (!handler) |
| 386 | return -EINVAL; |
| 387 | |
| 388 | for (i = 0; i < sdt_count; i++) { |
| 389 | if (sdt_entry[i].id != id) |
| 390 | continue; |
| 391 | count++; |
| 392 | if (count == 1) |
| 393 | handler(sdt_entry[i].pa, sdt_entry[i].size); |
| 394 | |
| 395 | else |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 396 | printk(KERN_WARNING PREFIX |
| 397 | "%d duplicate %s table ignored.\n", count, |
| 398 | acpi_table_signatures[id]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | } |
| 400 | |
| 401 | return count; |
| 402 | } |
| 403 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 404 | static int __init acpi_table_get_sdt(struct acpi_table_rsdp *rsdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | { |
| 406 | struct acpi_table_header *header = NULL; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 407 | unsigned int i, id = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | |
| 409 | if (!rsdp) |
| 410 | return -EINVAL; |
| 411 | |
| 412 | /* First check XSDT (but only on ACPI 2.0-compatible systems) */ |
| 413 | |
| 414 | if ((rsdp->revision >= 2) && |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 415 | (((struct acpi20_table_rsdp *)rsdp)->xsdt_address)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 417 | struct acpi_table_xsdt *mapped_xsdt = NULL; |
| 418 | |
| 419 | sdt_pa = ((struct acpi20_table_rsdp *)rsdp)->xsdt_address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | |
| 421 | /* map in just the header */ |
| 422 | header = (struct acpi_table_header *) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 423 | __acpi_map_table(sdt_pa, sizeof(struct acpi_table_header)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | |
| 425 | if (!header) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 426 | printk(KERN_WARNING PREFIX |
| 427 | "Unable to map XSDT header\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | return -ENODEV; |
| 429 | } |
| 430 | |
| 431 | /* remap in the entire table before processing */ |
| 432 | mapped_xsdt = (struct acpi_table_xsdt *) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 433 | __acpi_map_table(sdt_pa, header->length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | if (!mapped_xsdt) { |
| 435 | printk(KERN_WARNING PREFIX "Unable to map XSDT\n"); |
| 436 | return -ENODEV; |
| 437 | } |
| 438 | header = &mapped_xsdt->header; |
| 439 | |
| 440 | if (strncmp(header->signature, "XSDT", 4)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 441 | printk(KERN_WARNING PREFIX |
| 442 | "XSDT signature incorrect\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | return -ENODEV; |
| 444 | } |
| 445 | |
| 446 | if (acpi_table_compute_checksum(header, header->length)) { |
| 447 | printk(KERN_WARNING PREFIX "Invalid XSDT checksum\n"); |
| 448 | return -ENODEV; |
| 449 | } |
| 450 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 451 | sdt_count = |
| 452 | (header->length - sizeof(struct acpi_table_header)) >> 3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | if (sdt_count > ACPI_MAX_TABLES) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 454 | printk(KERN_WARNING PREFIX |
| 455 | "Truncated %lu XSDT entries\n", |
| 456 | (sdt_count - ACPI_MAX_TABLES)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | sdt_count = ACPI_MAX_TABLES; |
| 458 | } |
| 459 | |
| 460 | for (i = 0; i < sdt_count; i++) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 461 | sdt_entry[i].pa = (unsigned long)mapped_xsdt->entry[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | } |
| 463 | |
| 464 | /* Then check RSDT */ |
| 465 | |
| 466 | else if (rsdp->rsdt_address) { |
| 467 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 468 | struct acpi_table_rsdt *mapped_rsdt = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | |
| 470 | sdt_pa = rsdp->rsdt_address; |
| 471 | |
| 472 | /* map in just the header */ |
| 473 | header = (struct acpi_table_header *) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 474 | __acpi_map_table(sdt_pa, sizeof(struct acpi_table_header)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | if (!header) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 476 | printk(KERN_WARNING PREFIX |
| 477 | "Unable to map RSDT header\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | return -ENODEV; |
| 479 | } |
| 480 | |
| 481 | /* remap in the entire table before processing */ |
| 482 | mapped_rsdt = (struct acpi_table_rsdt *) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 483 | __acpi_map_table(sdt_pa, header->length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | if (!mapped_rsdt) { |
| 485 | printk(KERN_WARNING PREFIX "Unable to map RSDT\n"); |
| 486 | return -ENODEV; |
| 487 | } |
| 488 | header = &mapped_rsdt->header; |
| 489 | |
| 490 | if (strncmp(header->signature, "RSDT", 4)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 491 | printk(KERN_WARNING PREFIX |
| 492 | "RSDT signature incorrect\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | return -ENODEV; |
| 494 | } |
| 495 | |
| 496 | if (acpi_table_compute_checksum(header, header->length)) { |
| 497 | printk(KERN_WARNING PREFIX "Invalid RSDT checksum\n"); |
| 498 | return -ENODEV; |
| 499 | } |
| 500 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 501 | sdt_count = |
| 502 | (header->length - sizeof(struct acpi_table_header)) >> 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | if (sdt_count > ACPI_MAX_TABLES) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 504 | printk(KERN_WARNING PREFIX |
| 505 | "Truncated %lu RSDT entries\n", |
| 506 | (sdt_count - ACPI_MAX_TABLES)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | sdt_count = ACPI_MAX_TABLES; |
| 508 | } |
| 509 | |
| 510 | for (i = 0; i < sdt_count; i++) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 511 | sdt_entry[i].pa = (unsigned long)mapped_rsdt->entry[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | } |
| 513 | |
| 514 | else { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 515 | printk(KERN_WARNING PREFIX |
| 516 | "No System Description Table (RSDT/XSDT) specified in RSDP\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | return -ENODEV; |
| 518 | } |
| 519 | |
| 520 | acpi_table_print(header, sdt_pa); |
| 521 | |
| 522 | for (i = 0; i < sdt_count; i++) { |
| 523 | |
| 524 | /* map in just the header */ |
| 525 | header = (struct acpi_table_header *) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 526 | __acpi_map_table(sdt_entry[i].pa, |
| 527 | sizeof(struct acpi_table_header)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | if (!header) |
| 529 | continue; |
| 530 | |
| 531 | /* remap in the entire table before processing */ |
| 532 | header = (struct acpi_table_header *) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 533 | __acpi_map_table(sdt_entry[i].pa, header->length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | if (!header) |
| 535 | continue; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 536 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | acpi_table_print(header, sdt_entry[i].pa); |
| 538 | |
| 539 | if (acpi_table_compute_checksum(header, header->length)) { |
| 540 | printk(KERN_WARNING " >>> ERROR: Invalid checksum\n"); |
| 541 | continue; |
| 542 | } |
| 543 | |
| 544 | sdt_entry[i].size = header->length; |
| 545 | |
| 546 | for (id = 0; id < ACPI_TABLE_COUNT; id++) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 547 | if (!strncmp((char *)&header->signature, |
| 548 | acpi_table_signatures[id], |
| 549 | sizeof(header->signature))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | sdt_entry[i].id = id; |
| 551 | } |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | /* |
| 556 | * The DSDT is *not* in the RSDT (why not? no idea.) but we want |
| 557 | * to print its info, because this is what people usually blacklist |
| 558 | * against. Unfortunately, we don't know the phys_addr, so just |
| 559 | * print 0. Maybe no one will notice. |
| 560 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 561 | if (!acpi_get_table_header_early(ACPI_DSDT, &header)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | acpi_table_print(header, 0); |
| 563 | |
| 564 | return 0; |
| 565 | } |
| 566 | |
| 567 | /* |
| 568 | * acpi_table_init() |
| 569 | * |
| 570 | * find RSDP, find and checksum SDT/XSDT. |
| 571 | * checksum all tables, print SDT/XSDT |
| 572 | * |
| 573 | * result: sdt_entry[] is initialized |
| 574 | */ |
| 575 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 576 | int __init acpi_table_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 578 | struct acpi_table_rsdp *rsdp = NULL; |
| 579 | unsigned long rsdp_phys = 0; |
| 580 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | |
| 582 | /* Locate and map the Root System Description Table (RSDP) */ |
| 583 | |
| 584 | rsdp_phys = acpi_find_rsdp(); |
| 585 | if (!rsdp_phys) { |
| 586 | printk(KERN_ERR PREFIX "Unable to locate RSDP\n"); |
| 587 | return -ENODEV; |
| 588 | } |
| 589 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 590 | rsdp = (struct acpi_table_rsdp *)__va(rsdp_phys); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | if (!rsdp) { |
| 592 | printk(KERN_WARNING PREFIX "Unable to map RSDP\n"); |
| 593 | return -ENODEV; |
| 594 | } |
| 595 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 596 | printk(KERN_DEBUG PREFIX |
| 597 | "RSDP (v%3.3d %6.6s ) @ 0x%p\n", |
| 598 | rsdp->revision, rsdp->oem_id, (void *)rsdp_phys); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | |
| 600 | if (rsdp->revision < 2) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 601 | result = |
| 602 | acpi_table_compute_checksum(rsdp, |
| 603 | sizeof(struct acpi_table_rsdp)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | else |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 605 | result = |
| 606 | acpi_table_compute_checksum(rsdp, |
| 607 | ((struct acpi20_table_rsdp *) |
| 608 | rsdp)->length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | |
| 610 | if (result) { |
| 611 | printk(KERN_WARNING " >>> ERROR: Invalid checksum\n"); |
| 612 | return -ENODEV; |
| 613 | } |
| 614 | |
| 615 | /* Locate and map the System Description table (RSDT/XSDT) */ |
| 616 | |
| 617 | if (acpi_table_get_sdt(rsdp)) |
| 618 | return -ENODEV; |
| 619 | |
| 620 | return 0; |
| 621 | } |