Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: tbfadt - FADT table utilities |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
| 8 | * Copyright (C) 2000 - 2006, R. Byron Moore |
| 9 | * All rights reserved. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions, and the following disclaimer, |
| 16 | * without modification. |
| 17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 18 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 19 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 20 | * including a substantially similar Disclaimer requirement for further |
| 21 | * binary redistribution. |
| 22 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 23 | * of any contributors may be used to endorse or promote products derived |
| 24 | * from this software without specific prior written permission. |
| 25 | * |
| 26 | * Alternatively, this software may be distributed under the terms of the |
| 27 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 28 | * Software Foundation. |
| 29 | * |
| 30 | * NO WARRANTY |
| 31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 41 | * POSSIBILITY OF SUCH DAMAGES. |
| 42 | */ |
| 43 | |
| 44 | #include <acpi/acpi.h> |
| 45 | #include <acpi/actables.h> |
| 46 | |
| 47 | #define _COMPONENT ACPI_TABLES |
| 48 | ACPI_MODULE_NAME("tbfadt") |
| 49 | |
| 50 | /* Local prototypes */ |
| 51 | static void inline |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 52 | acpi_tb_init_generic_address(struct acpi_generic_address *generic_address, |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 53 | u8 bit_width, u64 address); |
| 54 | |
Bob Moore | 7139284 | 2007-02-02 19:48:20 +0300 | [diff] [blame^] | 55 | static void acpi_tb_convert_fadt(void); |
| 56 | |
| 57 | static void acpi_tb_validate_fadt(void); |
| 58 | |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 59 | /* Table for conversion of FADT to common internal format and FADT validation */ |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 60 | |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 61 | typedef struct acpi_fadt_info { |
| 62 | char *name; |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 63 | u8 target; |
| 64 | u8 source; |
| 65 | u8 length; |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 66 | u8 type; |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 67 | |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 68 | } acpi_fadt_info; |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 69 | |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 70 | #define ACPI_FADT_REQUIRED 1 |
| 71 | #define ACPI_FADT_SEPARATE_LENGTH 2 |
| 72 | |
| 73 | static struct acpi_fadt_info fadt_info_table[] = { |
| 74 | {"Pm1aEventBlock", ACPI_FADT_OFFSET(xpm1a_event_block), |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 75 | ACPI_FADT_OFFSET(pm1a_event_block), |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 76 | ACPI_FADT_OFFSET(pm1_event_length), ACPI_FADT_REQUIRED}, |
| 77 | |
| 78 | {"Pm1bEventBlock", ACPI_FADT_OFFSET(xpm1b_event_block), |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 79 | ACPI_FADT_OFFSET(pm1b_event_block), |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 80 | ACPI_FADT_OFFSET(pm1_event_length), 0}, |
| 81 | |
| 82 | {"Pm1aControlBlock", ACPI_FADT_OFFSET(xpm1a_control_block), |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 83 | ACPI_FADT_OFFSET(pm1a_control_block), |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 84 | ACPI_FADT_OFFSET(pm1_control_length), ACPI_FADT_REQUIRED}, |
| 85 | |
| 86 | {"Pm1bControlBlock", ACPI_FADT_OFFSET(xpm1b_control_block), |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 87 | ACPI_FADT_OFFSET(pm1b_control_block), |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 88 | ACPI_FADT_OFFSET(pm1_control_length), 0}, |
| 89 | |
| 90 | {"Pm2ControlBlock", ACPI_FADT_OFFSET(xpm2_control_block), |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 91 | ACPI_FADT_OFFSET(pm2_control_block), |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 92 | ACPI_FADT_OFFSET(pm2_control_length), ACPI_FADT_SEPARATE_LENGTH}, |
| 93 | |
| 94 | {"PmTimerBlock", ACPI_FADT_OFFSET(xpm_timer_block), |
| 95 | ACPI_FADT_OFFSET(pm_timer_block), |
| 96 | ACPI_FADT_OFFSET(pm_timer_length), ACPI_FADT_REQUIRED}, |
| 97 | |
| 98 | {"Gpe0Block", ACPI_FADT_OFFSET(xgpe0_block), |
| 99 | ACPI_FADT_OFFSET(gpe0_block), |
| 100 | ACPI_FADT_OFFSET(gpe0_block_length), ACPI_FADT_SEPARATE_LENGTH}, |
| 101 | |
| 102 | {"Gpe1Block", ACPI_FADT_OFFSET(xgpe1_block), |
| 103 | ACPI_FADT_OFFSET(gpe1_block), |
| 104 | ACPI_FADT_OFFSET(gpe1_block_length), ACPI_FADT_SEPARATE_LENGTH} |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 105 | }; |
| 106 | |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 107 | #define ACPI_FADT_INFO_ENTRIES (sizeof (fadt_info_table) / sizeof (struct acpi_fadt_info)) |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 108 | |
| 109 | /******************************************************************************* |
| 110 | * |
| 111 | * FUNCTION: acpi_tb_init_generic_address |
| 112 | * |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 113 | * PARAMETERS: generic_address - GAS struct to be initialized |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 114 | * bit_width - Width of this register |
| 115 | * Address - Address of the register |
| 116 | * |
| 117 | * RETURN: None |
| 118 | * |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 119 | * DESCRIPTION: Initialize a Generic Address Structure (GAS) |
| 120 | * See the ACPI specification for a full description and |
| 121 | * definition of this structure. |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 122 | * |
| 123 | ******************************************************************************/ |
| 124 | |
| 125 | static void inline |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 126 | acpi_tb_init_generic_address(struct acpi_generic_address *generic_address, |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 127 | u8 bit_width, u64 address) |
| 128 | { |
| 129 | |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 130 | /* |
| 131 | * The 64-bit Address field is non-aligned in the byte packed |
| 132 | * GAS struct. |
| 133 | */ |
| 134 | ACPI_MOVE_64_TO_64(&generic_address->address, &address); |
| 135 | |
| 136 | /* All other fields are byte-wide */ |
| 137 | |
| 138 | generic_address->space_id = ACPI_ADR_SPACE_SYSTEM_IO; |
| 139 | generic_address->bit_width = bit_width; |
| 140 | generic_address->bit_offset = 0; |
| 141 | generic_address->access_width = 0; |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 142 | } |
| 143 | |
| 144 | /******************************************************************************* |
| 145 | * |
| 146 | * FUNCTION: acpi_tb_parse_fadt |
| 147 | * |
| 148 | * PARAMETERS: table_index - Index for the FADT |
| 149 | * Flags - Flags |
| 150 | * |
| 151 | * RETURN: None |
| 152 | * |
| 153 | * DESCRIPTION: Initialize the FADT, DSDT and FACS tables |
| 154 | * (FADT contains the addresses of the DSDT and FACS) |
| 155 | * |
| 156 | ******************************************************************************/ |
| 157 | |
| 158 | void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags) |
| 159 | { |
| 160 | u32 length; |
| 161 | struct acpi_table_header *table; |
| 162 | |
| 163 | /* |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 164 | * The FADT has multiple versions with different lengths, |
| 165 | * and it contains pointers to both the DSDT and FACS tables. |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 166 | * |
| 167 | * Get a local copy of the FADT and convert it to a common format |
| 168 | * Map entire FADT, assumed to be smaller than one page. |
| 169 | */ |
| 170 | length = acpi_gbl_root_table_list.tables[table_index].length; |
| 171 | |
| 172 | table = |
| 173 | acpi_os_map_memory(acpi_gbl_root_table_list.tables[table_index]. |
| 174 | address, length); |
| 175 | if (!table) { |
| 176 | return; |
| 177 | } |
| 178 | |
| 179 | /* |
| 180 | * Validate the FADT checksum before we copy the table. Ignore |
| 181 | * checksum error as we want to try to get the DSDT and FACS. |
| 182 | */ |
| 183 | (void)acpi_tb_verify_checksum(table, length); |
| 184 | |
Bob Moore | 7139284 | 2007-02-02 19:48:20 +0300 | [diff] [blame^] | 185 | /* Obtain a local copy of the FADT in common ACPI 2.0+ format */ |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 186 | |
Bob Moore | 7139284 | 2007-02-02 19:48:20 +0300 | [diff] [blame^] | 187 | acpi_tb_create_local_fadt(table, length); |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 188 | |
| 189 | /* All done with the real FADT, unmap it */ |
| 190 | |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 191 | acpi_os_unmap_memory(table, length); |
| 192 | |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 193 | /* Obtain the DSDT and FACS tables via their addresses within the FADT */ |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 194 | |
| 195 | acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xdsdt, |
| 196 | flags, ACPI_SIG_DSDT, ACPI_TABLE_INDEX_DSDT); |
| 197 | |
| 198 | acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xfacs, |
| 199 | flags, ACPI_SIG_FACS, ACPI_TABLE_INDEX_FACS); |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 200 | } |
| 201 | |
| 202 | /******************************************************************************* |
| 203 | * |
Bob Moore | 7139284 | 2007-02-02 19:48:20 +0300 | [diff] [blame^] | 204 | * FUNCTION: acpi_tb_create_local_fadt |
| 205 | * |
| 206 | * PARAMETERS: Table - Pointer to BIOS FADT |
| 207 | * Length - Length of the table |
| 208 | * |
| 209 | * RETURN: None |
| 210 | * |
| 211 | * DESCRIPTION: Get a local copy of the FADT and convert it to a common format. |
| 212 | * Performs validation on some important FADT fields. |
| 213 | * |
| 214 | ******************************************************************************/ |
| 215 | |
| 216 | void acpi_tb_create_local_fadt(struct acpi_table_header *table, u32 length) |
| 217 | { |
| 218 | |
| 219 | /* |
| 220 | * Check if the FADT is larger than what we know about (ACPI 2.0 version). |
| 221 | * Truncate the table, but make some noise. |
| 222 | */ |
| 223 | if (length > sizeof(struct acpi_table_fadt)) { |
| 224 | ACPI_WARNING((AE_INFO, |
| 225 | "FADT (revision %u) is longer than ACPI 2.0 version, truncating length 0x%X to 0x%X", |
| 226 | table->revision, length, |
| 227 | sizeof(struct acpi_table_fadt))); |
| 228 | } |
| 229 | |
| 230 | /* Copy the entire FADT locally. Zero first for tb_convert_fadt */ |
| 231 | |
| 232 | ACPI_MEMSET(&acpi_gbl_FADT, 0, sizeof(struct acpi_table_fadt)); |
| 233 | |
| 234 | ACPI_MEMCPY(&acpi_gbl_FADT, table, |
| 235 | ACPI_MIN(length, sizeof(struct acpi_table_fadt))); |
| 236 | |
| 237 | /* |
| 238 | * 1) Convert the local copy of the FADT to the common internal format |
| 239 | * 2) Validate some of the important values within the FADT |
| 240 | */ |
| 241 | acpi_tb_convert_fadt(); |
| 242 | acpi_tb_validate_fadt(); |
| 243 | } |
| 244 | |
| 245 | /******************************************************************************* |
| 246 | * |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 247 | * FUNCTION: acpi_tb_convert_fadt |
| 248 | * |
| 249 | * PARAMETERS: None, uses acpi_gbl_FADT |
| 250 | * |
| 251 | * RETURN: None |
| 252 | * |
| 253 | * DESCRIPTION: Converts all versions of the FADT to a common internal format. |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 254 | * -> Expand all 32-bit addresses to 64-bit. |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 255 | * |
Bob Moore | e56b638 | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 256 | * NOTE: acpi_gbl_FADT must be of size (struct acpi_table_fadt), |
| 257 | * and must contain a copy of the actual FADT. |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 258 | * |
| 259 | * ACPICA will use the "X" fields of the FADT for all addresses. |
| 260 | * |
| 261 | * "X" fields are optional extensions to the original V1.0 fields. Even if |
| 262 | * they are present in the structure, they can be optionally not used by |
| 263 | * setting them to zero. Therefore, we must selectively expand V1.0 fields |
| 264 | * if the corresponding X field is zero. |
| 265 | * |
| 266 | * For ACPI 1.0 FADTs, all address fields are expanded to the corresponding |
| 267 | * "X" fields. |
| 268 | * |
| 269 | * For ACPI 2.0 FADTs, any "X" fields that are NULL are filled in by |
| 270 | * expanding the corresponding ACPI 1.0 field. |
| 271 | * |
| 272 | ******************************************************************************/ |
| 273 | |
Bob Moore | 7139284 | 2007-02-02 19:48:20 +0300 | [diff] [blame^] | 274 | static void acpi_tb_convert_fadt(void) |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 275 | { |
| 276 | u8 pm1_register_length; |
| 277 | struct acpi_generic_address *target; |
| 278 | acpi_native_uint i; |
| 279 | |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 280 | /* Update the local FADT table header length */ |
| 281 | |
| 282 | acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt); |
| 283 | |
| 284 | /* Expand the 32-bit FACS and DSDT addresses to 64-bit as necessary */ |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 285 | |
| 286 | if (!acpi_gbl_FADT.Xfacs) { |
| 287 | acpi_gbl_FADT.Xfacs = (u64) acpi_gbl_FADT.facs; |
| 288 | } |
| 289 | |
| 290 | if (!acpi_gbl_FADT.Xdsdt) { |
| 291 | acpi_gbl_FADT.Xdsdt = (u64) acpi_gbl_FADT.dsdt; |
| 292 | } |
| 293 | |
| 294 | /* |
| 295 | * Expand the 32-bit V1.0 addresses to the 64-bit "X" generic address |
| 296 | * structures as necessary. |
| 297 | */ |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 298 | for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) { |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 299 | target = |
| 300 | ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT, |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 301 | fadt_info_table[i].target); |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 302 | |
| 303 | /* Expand only if the X target is null */ |
| 304 | |
| 305 | if (!target->address) { |
| 306 | acpi_tb_init_generic_address(target, |
| 307 | *ACPI_ADD_PTR(u8, |
| 308 | &acpi_gbl_FADT, |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 309 | fadt_info_table |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 310 | [i].length), |
| 311 | (u64) * ACPI_ADD_PTR(u32, |
| 312 | &acpi_gbl_FADT, |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 313 | fadt_info_table |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 314 | [i]. |
| 315 | source)); |
| 316 | } |
| 317 | } |
| 318 | |
| 319 | /* |
| 320 | * Calculate separate GAS structs for the PM1 Enable registers. |
| 321 | * These addresses do not appear (directly) in the FADT, so it is |
| 322 | * useful to calculate them once, here. |
| 323 | * |
| 324 | * The PM event blocks are split into two register blocks, first is the |
| 325 | * PM Status Register block, followed immediately by the PM Enable Register |
| 326 | * block. Each is of length (pm1_event_length/2) |
| 327 | */ |
| 328 | pm1_register_length = (u8) ACPI_DIV_2(acpi_gbl_FADT.pm1_event_length); |
| 329 | |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 330 | /* The PM1A register block is required */ |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 331 | |
| 332 | acpi_tb_init_generic_address(&acpi_gbl_xpm1a_enable, |
| 333 | pm1_register_length, |
| 334 | (acpi_gbl_FADT.xpm1a_event_block.address + |
| 335 | pm1_register_length)); |
| 336 | |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 337 | /* The PM1B register block is optional, ignore if not present */ |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 338 | |
| 339 | if (acpi_gbl_FADT.xpm1b_event_block.address) { |
| 340 | acpi_tb_init_generic_address(&acpi_gbl_xpm1b_enable, |
| 341 | pm1_register_length, |
| 342 | (acpi_gbl_FADT.xpm1b_event_block. |
| 343 | address + pm1_register_length)); |
| 344 | } |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 345 | } |
| 346 | |
| 347 | /****************************************************************************** |
| 348 | * |
| 349 | * FUNCTION: acpi_tb_validate_fadt |
| 350 | * |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 351 | * PARAMETERS: Table - Pointer to the FADT to be validated |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 352 | * |
Bob Moore | e56b638 | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 353 | * RETURN: None |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 354 | * |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 355 | * DESCRIPTION: Validate various important fields within the FADT. If a problem |
| 356 | * is found, issue a message, but no status is returned. |
| 357 | * Used by both the table manager and the disassembler. |
| 358 | * |
| 359 | * Possible additional checks: |
| 360 | * (acpi_gbl_FADT.pm1_event_length >= 4) |
| 361 | * (acpi_gbl_FADT.pm1_control_length >= 2) |
| 362 | * (acpi_gbl_FADT.pm_timer_length >= 4) |
| 363 | * Gpe block lengths must be multiple of 2 |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 364 | * |
| 365 | ******************************************************************************/ |
| 366 | |
Bob Moore | 7139284 | 2007-02-02 19:48:20 +0300 | [diff] [blame^] | 367 | static void acpi_tb_validate_fadt(void) |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 368 | { |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 369 | u32 *address32; |
| 370 | struct acpi_generic_address *address64; |
| 371 | u8 length; |
| 372 | acpi_native_uint i; |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 373 | |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 374 | /* Examine all of the 64-bit extended address fields (X fields) */ |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 375 | |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 376 | for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) { |
| 377 | |
| 378 | /* Generate pointers to the 32-bit and 64-bit addresses and get the length */ |
| 379 | |
| 380 | address64 = |
Bob Moore | 7139284 | 2007-02-02 19:48:20 +0300 | [diff] [blame^] | 381 | ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT, |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 382 | fadt_info_table[i].target); |
Bob Moore | 7139284 | 2007-02-02 19:48:20 +0300 | [diff] [blame^] | 383 | address32 = |
| 384 | ACPI_ADD_PTR(u32, &acpi_gbl_FADT, |
| 385 | fadt_info_table[i].source); |
| 386 | length = |
| 387 | *ACPI_ADD_PTR(u8, &acpi_gbl_FADT, |
| 388 | fadt_info_table[i].length); |
Bob Moore | ea5d8eb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 389 | |
| 390 | if (fadt_info_table[i].type & ACPI_FADT_REQUIRED) { |
| 391 | /* |
| 392 | * Field is required (Pm1a_event, Pm1a_control, pm_timer). |
| 393 | * Both the address and length must be non-zero. |
| 394 | */ |
| 395 | if (!address64->address || !length) { |
| 396 | ACPI_ERROR((AE_INFO, |
| 397 | "Required field \"%s\" has zero address and/or length: %8.8X%8.8X/%X", |
| 398 | fadt_info_table[i].name, |
| 399 | ACPI_FORMAT_UINT64(address64-> |
| 400 | address), |
| 401 | length)); |
| 402 | } |
| 403 | } else if (fadt_info_table[i].type & ACPI_FADT_SEPARATE_LENGTH) { |
| 404 | /* |
| 405 | * Field is optional (PM2Control, GPE0, GPE1) AND has its own |
| 406 | * length field. If present, both the address and length must be valid. |
| 407 | */ |
| 408 | if ((address64->address && !length) |
| 409 | || (!address64->address && length)) { |
| 410 | ACPI_WARNING((AE_INFO, |
| 411 | "Optional field \"%s\" has zero address or length: %8.8X%8.8X/%X", |
| 412 | fadt_info_table[i].name, |
| 413 | ACPI_FORMAT_UINT64(address64-> |
| 414 | address), |
| 415 | length)); |
| 416 | } |
| 417 | } |
| 418 | |
| 419 | /* If both 32- and 64-bit addresses are valid (non-zero), they must match */ |
| 420 | |
| 421 | if (address64->address && *address32 && |
| 422 | (address64->address != (u64) * address32)) { |
| 423 | ACPI_ERROR((AE_INFO, |
| 424 | "32/64X address mismatch in \"%s\": [%8.8X] [%8.8X%8.8X], using 64X", |
| 425 | fadt_info_table[i].name, *address32, |
| 426 | ACPI_FORMAT_UINT64(address64->address))); |
| 427 | } |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 428 | } |
Bob Moore | 95befdb | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 429 | } |