Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * |
| 3 | * Module Name: utresrc - Resource managment utilities |
| 4 | * |
| 5 | ******************************************************************************/ |
| 6 | |
| 7 | /* |
Bob Moore | 4a90c7e | 2006-01-13 16:22:00 -0500 | [diff] [blame] | 8 | * Copyright (C) 2000 - 2006, R. Byron Moore |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 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/amlresrc.h> |
| 46 | |
| 47 | #define _COMPONENT ACPI_UTILITIES |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 48 | ACPI_MODULE_NAME("utresrc") |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 49 | |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 50 | #if defined(ACPI_DISASSEMBLER) || defined (ACPI_DEBUGGER) |
| 51 | /* |
| 52 | * Strings used to decode resource descriptors. |
| 53 | * Used by both the disasssembler and the debugger resource dump routines |
| 54 | */ |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 55 | const char *acpi_gbl_bm_decode[] = { |
| 56 | "NotBusMaster", |
| 57 | "BusMaster" |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 58 | }; |
| 59 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 60 | const char *acpi_gbl_config_decode[] = { |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 61 | "0 - Good Configuration", |
| 62 | "1 - Acceptable Configuration", |
| 63 | "2 - Suboptimal Configuration", |
| 64 | "3 - ***Invalid Configuration***", |
| 65 | }; |
| 66 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 67 | const char *acpi_gbl_consume_decode[] = { |
| 68 | "ResourceProducer", |
| 69 | "ResourceConsumer" |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 70 | }; |
| 71 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 72 | const char *acpi_gbl_dec_decode[] = { |
| 73 | "PosDecode", |
| 74 | "SubDecode" |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 75 | }; |
| 76 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 77 | const char *acpi_gbl_he_decode[] = { |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 78 | "Level", |
| 79 | "Edge" |
| 80 | }; |
| 81 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 82 | const char *acpi_gbl_io_decode[] = { |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 83 | "Decode10", |
| 84 | "Decode16" |
| 85 | }; |
| 86 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 87 | const char *acpi_gbl_ll_decode[] = { |
| 88 | "ActiveHigh", |
| 89 | "ActiveLow" |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 90 | }; |
| 91 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 92 | const char *acpi_gbl_max_decode[] = { |
| 93 | "MaxNotFixed", |
| 94 | "MaxFixed" |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 95 | }; |
| 96 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 97 | const char *acpi_gbl_mem_decode[] = { |
| 98 | "NonCacheable", |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 99 | "Cacheable", |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 100 | "WriteCombining", |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 101 | "Prefetchable" |
| 102 | }; |
| 103 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 104 | const char *acpi_gbl_min_decode[] = { |
| 105 | "MinNotFixed", |
| 106 | "MinFixed" |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 107 | }; |
| 108 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 109 | const char *acpi_gbl_mtp_decode[] = { |
| 110 | "AddressRangeMemory", |
| 111 | "AddressRangeReserved", |
| 112 | "AddressRangeACPI", |
| 113 | "AddressRangeNVS" |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 114 | }; |
| 115 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 116 | const char *acpi_gbl_rng_decode[] = { |
| 117 | "InvalidRanges", |
| 118 | "NonISAOnlyRanges", |
| 119 | "ISAOnlyRanges", |
| 120 | "EntireRange" |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 121 | }; |
| 122 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 123 | const char *acpi_gbl_rw_decode[] = { |
| 124 | "ReadOnly", |
| 125 | "ReadWrite" |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 126 | }; |
| 127 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 128 | const char *acpi_gbl_shr_decode[] = { |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 129 | "Exclusive", |
| 130 | "Shared" |
| 131 | }; |
| 132 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 133 | const char *acpi_gbl_siz_decode[] = { |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 134 | "Transfer8", |
| 135 | "Transfer8_16", |
| 136 | "Transfer16", |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 137 | "InvalidSize" |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 138 | }; |
| 139 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 140 | const char *acpi_gbl_trs_decode[] = { |
| 141 | "DenseTranslation", |
| 142 | "SparseTranslation" |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 143 | }; |
| 144 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 145 | const char *acpi_gbl_ttp_decode[] = { |
| 146 | "TypeStatic", |
| 147 | "TypeTranslation" |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 148 | }; |
| 149 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 150 | const char *acpi_gbl_typ_decode[] = { |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 151 | "Compatibility", |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 152 | "TypeA", |
| 153 | "TypeB", |
| 154 | "TypeF" |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 155 | }; |
| 156 | |
| 157 | #endif |
| 158 | |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 159 | /* |
| 160 | * Base sizes of the raw AML resource descriptors, indexed by resource type. |
| 161 | * Zero indicates a reserved (and therefore invalid) resource type. |
| 162 | */ |
| 163 | const u8 acpi_gbl_resource_aml_sizes[] = { |
| 164 | /* Small descriptors */ |
| 165 | |
| 166 | 0, |
| 167 | 0, |
| 168 | 0, |
| 169 | 0, |
| 170 | ACPI_AML_SIZE_SMALL(struct aml_resource_irq), |
| 171 | ACPI_AML_SIZE_SMALL(struct aml_resource_dma), |
| 172 | ACPI_AML_SIZE_SMALL(struct aml_resource_start_dependent), |
| 173 | ACPI_AML_SIZE_SMALL(struct aml_resource_end_dependent), |
| 174 | ACPI_AML_SIZE_SMALL(struct aml_resource_io), |
| 175 | ACPI_AML_SIZE_SMALL(struct aml_resource_fixed_io), |
| 176 | 0, |
| 177 | 0, |
| 178 | 0, |
| 179 | 0, |
| 180 | ACPI_AML_SIZE_SMALL(struct aml_resource_vendor_small), |
| 181 | ACPI_AML_SIZE_SMALL(struct aml_resource_end_tag), |
| 182 | |
| 183 | /* Large descriptors */ |
| 184 | |
| 185 | 0, |
| 186 | ACPI_AML_SIZE_LARGE(struct aml_resource_memory24), |
| 187 | ACPI_AML_SIZE_LARGE(struct aml_resource_generic_register), |
| 188 | 0, |
| 189 | ACPI_AML_SIZE_LARGE(struct aml_resource_vendor_large), |
| 190 | ACPI_AML_SIZE_LARGE(struct aml_resource_memory32), |
| 191 | ACPI_AML_SIZE_LARGE(struct aml_resource_fixed_memory32), |
| 192 | ACPI_AML_SIZE_LARGE(struct aml_resource_address32), |
| 193 | ACPI_AML_SIZE_LARGE(struct aml_resource_address16), |
| 194 | ACPI_AML_SIZE_LARGE(struct aml_resource_extended_irq), |
| 195 | ACPI_AML_SIZE_LARGE(struct aml_resource_address64), |
| 196 | ACPI_AML_SIZE_LARGE(struct aml_resource_extended_address64) |
| 197 | }; |
| 198 | |
| 199 | /* |
| 200 | * Resource types, used to validate the resource length field. |
| 201 | * The length of fixed-length types must match exactly, variable |
| 202 | * lengths must meet the minimum required length, etc. |
| 203 | * Zero indicates a reserved (and therefore invalid) resource type. |
| 204 | */ |
| 205 | static const u8 acpi_gbl_resource_types[] = { |
| 206 | /* Small descriptors */ |
| 207 | |
| 208 | 0, |
| 209 | 0, |
| 210 | 0, |
| 211 | 0, |
| 212 | ACPI_SMALL_VARIABLE_LENGTH, |
| 213 | ACPI_FIXED_LENGTH, |
| 214 | ACPI_SMALL_VARIABLE_LENGTH, |
| 215 | ACPI_FIXED_LENGTH, |
| 216 | ACPI_FIXED_LENGTH, |
| 217 | ACPI_FIXED_LENGTH, |
| 218 | 0, |
| 219 | 0, |
| 220 | 0, |
| 221 | 0, |
| 222 | ACPI_VARIABLE_LENGTH, |
| 223 | ACPI_FIXED_LENGTH, |
| 224 | |
| 225 | /* Large descriptors */ |
| 226 | |
| 227 | 0, |
| 228 | ACPI_FIXED_LENGTH, |
| 229 | ACPI_FIXED_LENGTH, |
| 230 | 0, |
| 231 | ACPI_VARIABLE_LENGTH, |
| 232 | ACPI_FIXED_LENGTH, |
| 233 | ACPI_FIXED_LENGTH, |
| 234 | ACPI_VARIABLE_LENGTH, |
| 235 | ACPI_VARIABLE_LENGTH, |
| 236 | ACPI_VARIABLE_LENGTH, |
| 237 | ACPI_VARIABLE_LENGTH, |
| 238 | ACPI_FIXED_LENGTH |
| 239 | }; |
| 240 | |
| 241 | /******************************************************************************* |
| 242 | * |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 243 | * FUNCTION: acpi_ut_walk_aml_resources |
| 244 | * |
| 245 | * PARAMETERS: Aml - Pointer to the raw AML resource template |
| 246 | * aml_length - Length of the entire template |
| 247 | * user_function - Called once for each descriptor found. If |
| 248 | * NULL, a pointer to the end_tag is returned |
| 249 | * Context - Passed to user_function |
| 250 | * |
| 251 | * RETURN: Status |
| 252 | * |
| 253 | * DESCRIPTION: Walk a raw AML resource list(buffer). User function called |
| 254 | * once for each resource found. |
| 255 | * |
| 256 | ******************************************************************************/ |
| 257 | |
| 258 | acpi_status |
| 259 | acpi_ut_walk_aml_resources(u8 * aml, |
| 260 | acpi_size aml_length, |
Bob Moore | 793c238 | 2006-03-31 00:00:00 -0500 | [diff] [blame] | 261 | acpi_walk_aml_callback user_function, void **context) |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 262 | { |
| 263 | acpi_status status; |
| 264 | u8 *end_aml; |
| 265 | u8 resource_index; |
| 266 | u32 length; |
| 267 | u32 offset = 0; |
| 268 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 269 | ACPI_FUNCTION_TRACE(ut_walk_aml_resources); |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 270 | |
| 271 | /* The absolute minimum resource template is one end_tag descriptor */ |
| 272 | |
| 273 | if (aml_length < sizeof(struct aml_resource_end_tag)) { |
| 274 | return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG); |
| 275 | } |
| 276 | |
| 277 | /* Point to the end of the resource template buffer */ |
| 278 | |
| 279 | end_aml = aml + aml_length; |
| 280 | |
| 281 | /* Walk the byte list, abort on any invalid descriptor type or length */ |
| 282 | |
| 283 | while (aml < end_aml) { |
| 284 | |
| 285 | /* Validate the Resource Type and Resource Length */ |
| 286 | |
| 287 | status = acpi_ut_validate_resource(aml, &resource_index); |
| 288 | if (ACPI_FAILURE(status)) { |
| 289 | return_ACPI_STATUS(status); |
| 290 | } |
| 291 | |
| 292 | /* Get the length of this descriptor */ |
| 293 | |
| 294 | length = acpi_ut_get_descriptor_length(aml); |
| 295 | |
| 296 | /* Invoke the user function */ |
| 297 | |
| 298 | if (user_function) { |
| 299 | status = |
| 300 | user_function(aml, length, offset, resource_index, |
| 301 | context); |
| 302 | if (ACPI_FAILURE(status)) { |
| 303 | return (status); |
| 304 | } |
| 305 | } |
| 306 | |
| 307 | /* An end_tag descriptor terminates this resource template */ |
| 308 | |
| 309 | if (acpi_ut_get_resource_type(aml) == |
| 310 | ACPI_RESOURCE_NAME_END_TAG) { |
| 311 | /* |
| 312 | * There must be at least one more byte in the buffer for |
| 313 | * the 2nd byte of the end_tag |
| 314 | */ |
| 315 | if ((aml + 1) >= end_aml) { |
| 316 | return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG); |
| 317 | } |
| 318 | |
| 319 | /* Return the pointer to the end_tag if requested */ |
| 320 | |
| 321 | if (!user_function) { |
Bob Moore | 793c238 | 2006-03-31 00:00:00 -0500 | [diff] [blame] | 322 | *context = aml; |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 323 | } |
| 324 | |
| 325 | /* Normal exit */ |
| 326 | |
| 327 | return_ACPI_STATUS(AE_OK); |
| 328 | } |
| 329 | |
| 330 | aml += length; |
| 331 | offset += length; |
| 332 | } |
| 333 | |
| 334 | /* Did not find an end_tag descriptor */ |
| 335 | |
| 336 | return (AE_AML_NO_RESOURCE_END_TAG); |
| 337 | } |
| 338 | |
| 339 | /******************************************************************************* |
| 340 | * |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 341 | * FUNCTION: acpi_ut_validate_resource |
| 342 | * |
| 343 | * PARAMETERS: Aml - Pointer to the raw AML resource descriptor |
| 344 | * return_index - Where the resource index is returned. NULL |
| 345 | * if the index is not required. |
| 346 | * |
| 347 | * RETURN: Status, and optionally the Index into the global resource tables |
| 348 | * |
| 349 | * DESCRIPTION: Validate an AML resource descriptor by checking the Resource |
| 350 | * Type and Resource Length. Returns an index into the global |
| 351 | * resource information/dispatch tables for later use. |
| 352 | * |
| 353 | ******************************************************************************/ |
| 354 | |
| 355 | acpi_status acpi_ut_validate_resource(void *aml, u8 * return_index) |
| 356 | { |
| 357 | u8 resource_type; |
| 358 | u8 resource_index; |
| 359 | acpi_rs_length resource_length; |
| 360 | acpi_rs_length minimum_resource_length; |
| 361 | |
| 362 | ACPI_FUNCTION_ENTRY(); |
| 363 | |
| 364 | /* |
| 365 | * 1) Validate the resource_type field (Byte 0) |
| 366 | */ |
Bob Moore | c51a4de | 2005-11-17 13:07:00 -0500 | [diff] [blame] | 367 | resource_type = ACPI_GET8(aml); |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 368 | |
| 369 | /* |
| 370 | * Byte 0 contains the descriptor name (Resource Type) |
| 371 | * Examine the large/small bit in the resource header |
| 372 | */ |
| 373 | if (resource_type & ACPI_RESOURCE_NAME_LARGE) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 374 | |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 375 | /* Verify the large resource type (name) against the max */ |
| 376 | |
| 377 | if (resource_type > ACPI_RESOURCE_NAME_LARGE_MAX) { |
| 378 | return (AE_AML_INVALID_RESOURCE_TYPE); |
| 379 | } |
| 380 | |
| 381 | /* |
| 382 | * Large Resource Type -- bits 6:0 contain the name |
| 383 | * Translate range 0x80-0x8B to index range 0x10-0x1B |
| 384 | */ |
| 385 | resource_index = (u8) (resource_type - 0x70); |
| 386 | } else { |
| 387 | /* |
| 388 | * Small Resource Type -- bits 6:3 contain the name |
| 389 | * Shift range to index range 0x00-0x0F |
| 390 | */ |
| 391 | resource_index = (u8) |
| 392 | ((resource_type & ACPI_RESOURCE_NAME_SMALL_MASK) >> 3); |
| 393 | } |
| 394 | |
| 395 | /* Check validity of the resource type, zero indicates name is invalid */ |
| 396 | |
| 397 | if (!acpi_gbl_resource_types[resource_index]) { |
| 398 | return (AE_AML_INVALID_RESOURCE_TYPE); |
| 399 | } |
| 400 | |
| 401 | /* |
| 402 | * 2) Validate the resource_length field. This ensures that the length |
| 403 | * is at least reasonable, and guarantees that it is non-zero. |
| 404 | */ |
| 405 | resource_length = acpi_ut_get_resource_length(aml); |
| 406 | minimum_resource_length = acpi_gbl_resource_aml_sizes[resource_index]; |
| 407 | |
| 408 | /* Validate based upon the type of resource - fixed length or variable */ |
| 409 | |
| 410 | switch (acpi_gbl_resource_types[resource_index]) { |
| 411 | case ACPI_FIXED_LENGTH: |
| 412 | |
| 413 | /* Fixed length resource, length must match exactly */ |
| 414 | |
| 415 | if (resource_length != minimum_resource_length) { |
| 416 | return (AE_AML_BAD_RESOURCE_LENGTH); |
| 417 | } |
| 418 | break; |
| 419 | |
| 420 | case ACPI_VARIABLE_LENGTH: |
| 421 | |
| 422 | /* Variable length resource, length must be at least the minimum */ |
| 423 | |
| 424 | if (resource_length < minimum_resource_length) { |
| 425 | return (AE_AML_BAD_RESOURCE_LENGTH); |
| 426 | } |
| 427 | break; |
| 428 | |
| 429 | case ACPI_SMALL_VARIABLE_LENGTH: |
| 430 | |
| 431 | /* Small variable length resource, length can be (Min) or (Min-1) */ |
| 432 | |
| 433 | if ((resource_length > minimum_resource_length) || |
| 434 | (resource_length < (minimum_resource_length - 1))) { |
| 435 | return (AE_AML_BAD_RESOURCE_LENGTH); |
| 436 | } |
| 437 | break; |
| 438 | |
| 439 | default: |
| 440 | |
| 441 | /* Shouldn't happen (because of validation earlier), but be sure */ |
| 442 | |
| 443 | return (AE_AML_INVALID_RESOURCE_TYPE); |
| 444 | } |
| 445 | |
| 446 | /* Optionally return the resource table index */ |
| 447 | |
| 448 | if (return_index) { |
| 449 | *return_index = resource_index; |
| 450 | } |
| 451 | |
| 452 | return (AE_OK); |
| 453 | } |
| 454 | |
| 455 | /******************************************************************************* |
| 456 | * |
| 457 | * FUNCTION: acpi_ut_get_resource_type |
| 458 | * |
| 459 | * PARAMETERS: Aml - Pointer to the raw AML resource descriptor |
| 460 | * |
| 461 | * RETURN: The Resource Type with no extraneous bits (except the |
| 462 | * Large/Small descriptor bit -- this is left alone) |
| 463 | * |
| 464 | * DESCRIPTION: Extract the Resource Type/Name from the first byte of |
| 465 | * a resource descriptor. |
| 466 | * |
| 467 | ******************************************************************************/ |
| 468 | |
| 469 | u8 acpi_ut_get_resource_type(void *aml) |
| 470 | { |
| 471 | ACPI_FUNCTION_ENTRY(); |
| 472 | |
| 473 | /* |
| 474 | * Byte 0 contains the descriptor name (Resource Type) |
| 475 | * Examine the large/small bit in the resource header |
| 476 | */ |
Bob Moore | c51a4de | 2005-11-17 13:07:00 -0500 | [diff] [blame] | 477 | if (ACPI_GET8(aml) & ACPI_RESOURCE_NAME_LARGE) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 478 | |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 479 | /* Large Resource Type -- bits 6:0 contain the name */ |
| 480 | |
Bob Moore | c51a4de | 2005-11-17 13:07:00 -0500 | [diff] [blame] | 481 | return (ACPI_GET8(aml)); |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 482 | } else { |
| 483 | /* Small Resource Type -- bits 6:3 contain the name */ |
| 484 | |
Bob Moore | c51a4de | 2005-11-17 13:07:00 -0500 | [diff] [blame] | 485 | return ((u8) (ACPI_GET8(aml) & ACPI_RESOURCE_NAME_SMALL_MASK)); |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 486 | } |
| 487 | } |
| 488 | |
| 489 | /******************************************************************************* |
| 490 | * |
| 491 | * FUNCTION: acpi_ut_get_resource_length |
| 492 | * |
| 493 | * PARAMETERS: Aml - Pointer to the raw AML resource descriptor |
| 494 | * |
| 495 | * RETURN: Byte Length |
| 496 | * |
| 497 | * DESCRIPTION: Get the "Resource Length" of a raw AML descriptor. By |
| 498 | * definition, this does not include the size of the descriptor |
| 499 | * header or the length field itself. |
| 500 | * |
| 501 | ******************************************************************************/ |
| 502 | |
| 503 | u16 acpi_ut_get_resource_length(void *aml) |
| 504 | { |
| 505 | acpi_rs_length resource_length; |
| 506 | |
| 507 | ACPI_FUNCTION_ENTRY(); |
| 508 | |
| 509 | /* |
| 510 | * Byte 0 contains the descriptor name (Resource Type) |
| 511 | * Examine the large/small bit in the resource header |
| 512 | */ |
Bob Moore | c51a4de | 2005-11-17 13:07:00 -0500 | [diff] [blame] | 513 | if (ACPI_GET8(aml) & ACPI_RESOURCE_NAME_LARGE) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 514 | |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 515 | /* Large Resource type -- bytes 1-2 contain the 16-bit length */ |
| 516 | |
Bob Moore | c51a4de | 2005-11-17 13:07:00 -0500 | [diff] [blame] | 517 | ACPI_MOVE_16_TO_16(&resource_length, ACPI_ADD_PTR(u8, aml, 1)); |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 518 | |
| 519 | } else { |
| 520 | /* Small Resource type -- bits 2:0 of byte 0 contain the length */ |
| 521 | |
Bob Moore | c51a4de | 2005-11-17 13:07:00 -0500 | [diff] [blame] | 522 | resource_length = (u16) (ACPI_GET8(aml) & |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 523 | ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK); |
| 524 | } |
| 525 | |
| 526 | return (resource_length); |
| 527 | } |
| 528 | |
| 529 | /******************************************************************************* |
| 530 | * |
| 531 | * FUNCTION: acpi_ut_get_resource_header_length |
| 532 | * |
| 533 | * PARAMETERS: Aml - Pointer to the raw AML resource descriptor |
| 534 | * |
| 535 | * RETURN: Length of the AML header (depends on large/small descriptor) |
| 536 | * |
| 537 | * DESCRIPTION: Get the length of the header for this resource. |
| 538 | * |
| 539 | ******************************************************************************/ |
| 540 | |
| 541 | u8 acpi_ut_get_resource_header_length(void *aml) |
| 542 | { |
| 543 | ACPI_FUNCTION_ENTRY(); |
| 544 | |
| 545 | /* Examine the large/small bit in the resource header */ |
| 546 | |
Bob Moore | c51a4de | 2005-11-17 13:07:00 -0500 | [diff] [blame] | 547 | if (ACPI_GET8(aml) & ACPI_RESOURCE_NAME_LARGE) { |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 548 | return (sizeof(struct aml_resource_large_header)); |
| 549 | } else { |
| 550 | return (sizeof(struct aml_resource_small_header)); |
| 551 | } |
| 552 | } |
| 553 | |
| 554 | /******************************************************************************* |
| 555 | * |
| 556 | * FUNCTION: acpi_ut_get_descriptor_length |
| 557 | * |
| 558 | * PARAMETERS: Aml - Pointer to the raw AML resource descriptor |
| 559 | * |
| 560 | * RETURN: Byte length |
| 561 | * |
| 562 | * DESCRIPTION: Get the total byte length of a raw AML descriptor, including the |
| 563 | * length of the descriptor header and the length field itself. |
| 564 | * Used to walk descriptor lists. |
| 565 | * |
| 566 | ******************************************************************************/ |
| 567 | |
| 568 | u32 acpi_ut_get_descriptor_length(void *aml) |
| 569 | { |
| 570 | ACPI_FUNCTION_ENTRY(); |
| 571 | |
| 572 | /* |
| 573 | * Get the Resource Length (does not include header length) and add |
| 574 | * the header length (depends on if this is a small or large resource) |
| 575 | */ |
| 576 | return (acpi_ut_get_resource_length(aml) + |
| 577 | acpi_ut_get_resource_header_length(aml)); |
| 578 | } |
| 579 | |
| 580 | /******************************************************************************* |
| 581 | * |
| 582 | * FUNCTION: acpi_ut_get_resource_end_tag |
| 583 | * |
| 584 | * PARAMETERS: obj_desc - The resource template buffer object |
Bob Moore | c51a4de | 2005-11-17 13:07:00 -0500 | [diff] [blame] | 585 | * end_tag - Where the pointer to the end_tag is returned |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 586 | * |
Bob Moore | c51a4de | 2005-11-17 13:07:00 -0500 | [diff] [blame] | 587 | * RETURN: Status, pointer to the end tag |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 588 | * |
| 589 | * DESCRIPTION: Find the end_tag resource descriptor in an AML resource template |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 590 | * Note: allows a buffer length of zero. |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 591 | * |
| 592 | ******************************************************************************/ |
| 593 | |
| 594 | acpi_status |
| 595 | acpi_ut_get_resource_end_tag(union acpi_operand_object * obj_desc, |
| 596 | u8 ** end_tag) |
| 597 | { |
| 598 | acpi_status status; |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 599 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 600 | ACPI_FUNCTION_TRACE(ut_get_resource_end_tag); |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 601 | |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 602 | /* Allow a buffer length of zero */ |
| 603 | |
| 604 | if (!obj_desc->buffer.length) { |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 605 | *end_tag = obj_desc->buffer.pointer; |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 606 | return_ACPI_STATUS(AE_OK); |
| 607 | } |
| 608 | |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 609 | /* Validate the template and get a pointer to the end_tag */ |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 610 | |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 611 | status = acpi_ut_walk_aml_resources(obj_desc->buffer.pointer, |
| 612 | obj_desc->buffer.length, NULL, |
Bob Moore | 793c238 | 2006-03-31 00:00:00 -0500 | [diff] [blame] | 613 | (void **)end_tag); |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 614 | |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 615 | return_ACPI_STATUS(status); |
Bob Moore | 96db255 | 2005-11-02 00:00:00 -0500 | [diff] [blame] | 616 | } |