Bob Moore | 76a6225 | 2013-03-08 09:23:16 +0000 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: nsconvert - Object conversions for objects returned by |
| 4 | * predefined methods |
| 5 | * |
| 6 | *****************************************************************************/ |
| 7 | |
| 8 | /* |
| 9 | * Copyright (C) 2000 - 2013, Intel Corp. |
| 10 | * All rights reserved. |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or without |
| 13 | * modification, are permitted provided that the following conditions |
| 14 | * are met: |
| 15 | * 1. Redistributions of source code must retain the above copyright |
| 16 | * notice, this list of conditions, and the following disclaimer, |
| 17 | * without modification. |
| 18 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 19 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 20 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 21 | * including a substantially similar Disclaimer requirement for further |
| 22 | * binary redistribution. |
| 23 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 24 | * of any contributors may be used to endorse or promote products derived |
| 25 | * from this software without specific prior written permission. |
| 26 | * |
| 27 | * Alternatively, this software may be distributed under the terms of the |
| 28 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 29 | * Software Foundation. |
| 30 | * |
| 31 | * NO WARRANTY |
| 32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 35 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 36 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 37 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 38 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 39 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 40 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 41 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 42 | * POSSIBILITY OF SUCH DAMAGES. |
| 43 | */ |
| 44 | |
| 45 | #include <acpi/acpi.h> |
| 46 | #include "accommon.h" |
| 47 | #include "acnamesp.h" |
| 48 | #include "acinterp.h" |
| 49 | #include "acpredef.h" |
| 50 | #include "amlresrc.h" |
| 51 | |
| 52 | #define _COMPONENT ACPI_NAMESPACE |
| 53 | ACPI_MODULE_NAME("nsconvert") |
| 54 | |
| 55 | /******************************************************************************* |
| 56 | * |
| 57 | * FUNCTION: acpi_ns_convert_to_integer |
| 58 | * |
| 59 | * PARAMETERS: original_object - Object to be converted |
| 60 | * return_object - Where the new converted object is returned |
| 61 | * |
| 62 | * RETURN: Status. AE_OK if conversion was successful. |
| 63 | * |
| 64 | * DESCRIPTION: Attempt to convert a String/Buffer object to an Integer. |
| 65 | * |
| 66 | ******************************************************************************/ |
| 67 | acpi_status |
| 68 | acpi_ns_convert_to_integer(union acpi_operand_object *original_object, |
| 69 | union acpi_operand_object **return_object) |
| 70 | { |
| 71 | union acpi_operand_object *new_object; |
| 72 | acpi_status status; |
| 73 | u64 value = 0; |
| 74 | u32 i; |
| 75 | |
| 76 | switch (original_object->common.type) { |
| 77 | case ACPI_TYPE_STRING: |
| 78 | |
| 79 | /* String-to-Integer conversion */ |
| 80 | |
| 81 | status = acpi_ut_strtoul64(original_object->string.pointer, |
| 82 | ACPI_ANY_BASE, &value); |
| 83 | if (ACPI_FAILURE(status)) { |
| 84 | return (status); |
| 85 | } |
| 86 | break; |
| 87 | |
| 88 | case ACPI_TYPE_BUFFER: |
| 89 | |
| 90 | /* Buffer-to-Integer conversion. Max buffer size is 64 bits. */ |
| 91 | |
| 92 | if (original_object->buffer.length > 8) { |
| 93 | return (AE_AML_OPERAND_TYPE); |
| 94 | } |
| 95 | |
| 96 | /* Extract each buffer byte to create the integer */ |
| 97 | |
| 98 | for (i = 0; i < original_object->buffer.length; i++) { |
| 99 | value |= |
| 100 | ((u64)original_object->buffer. |
| 101 | pointer[i] << (i * 8)); |
| 102 | } |
| 103 | break; |
| 104 | |
| 105 | default: |
| 106 | return (AE_AML_OPERAND_TYPE); |
| 107 | } |
| 108 | |
| 109 | new_object = acpi_ut_create_integer_object(value); |
| 110 | if (!new_object) { |
| 111 | return (AE_NO_MEMORY); |
| 112 | } |
| 113 | |
| 114 | *return_object = new_object; |
| 115 | return (AE_OK); |
| 116 | } |
| 117 | |
| 118 | /******************************************************************************* |
| 119 | * |
| 120 | * FUNCTION: acpi_ns_convert_to_string |
| 121 | * |
| 122 | * PARAMETERS: original_object - Object to be converted |
| 123 | * return_object - Where the new converted object is returned |
| 124 | * |
| 125 | * RETURN: Status. AE_OK if conversion was successful. |
| 126 | * |
| 127 | * DESCRIPTION: Attempt to convert a Integer/Buffer object to a String. |
| 128 | * |
| 129 | ******************************************************************************/ |
| 130 | |
| 131 | acpi_status |
| 132 | acpi_ns_convert_to_string(union acpi_operand_object *original_object, |
| 133 | union acpi_operand_object **return_object) |
| 134 | { |
| 135 | union acpi_operand_object *new_object; |
| 136 | acpi_size length; |
| 137 | acpi_status status; |
| 138 | |
| 139 | switch (original_object->common.type) { |
| 140 | case ACPI_TYPE_INTEGER: |
| 141 | /* |
| 142 | * Integer-to-String conversion. Commonly, convert |
| 143 | * an integer of value 0 to a NULL string. The last element of |
| 144 | * _BIF and _BIX packages occasionally need this fix. |
| 145 | */ |
| 146 | if (original_object->integer.value == 0) { |
| 147 | |
| 148 | /* Allocate a new NULL string object */ |
| 149 | |
| 150 | new_object = acpi_ut_create_string_object(0); |
| 151 | if (!new_object) { |
| 152 | return (AE_NO_MEMORY); |
| 153 | } |
| 154 | } else { |
| 155 | status = |
| 156 | acpi_ex_convert_to_string(original_object, |
| 157 | &new_object, |
| 158 | ACPI_IMPLICIT_CONVERT_HEX); |
| 159 | if (ACPI_FAILURE(status)) { |
| 160 | return (status); |
| 161 | } |
| 162 | } |
| 163 | break; |
| 164 | |
| 165 | case ACPI_TYPE_BUFFER: |
| 166 | /* |
| 167 | * Buffer-to-String conversion. Use a to_string |
| 168 | * conversion, no transform performed on the buffer data. The best |
| 169 | * example of this is the _BIF method, where the string data from |
| 170 | * the battery is often (incorrectly) returned as buffer object(s). |
| 171 | */ |
| 172 | length = 0; |
| 173 | while ((length < original_object->buffer.length) && |
| 174 | (original_object->buffer.pointer[length])) { |
| 175 | length++; |
| 176 | } |
| 177 | |
| 178 | /* Allocate a new string object */ |
| 179 | |
| 180 | new_object = acpi_ut_create_string_object(length); |
| 181 | if (!new_object) { |
| 182 | return (AE_NO_MEMORY); |
| 183 | } |
| 184 | |
| 185 | /* |
| 186 | * Copy the raw buffer data with no transform. String is already NULL |
| 187 | * terminated at Length+1. |
| 188 | */ |
| 189 | ACPI_MEMCPY(new_object->string.pointer, |
| 190 | original_object->buffer.pointer, length); |
| 191 | break; |
| 192 | |
| 193 | default: |
| 194 | return (AE_AML_OPERAND_TYPE); |
| 195 | } |
| 196 | |
| 197 | *return_object = new_object; |
| 198 | return (AE_OK); |
| 199 | } |
| 200 | |
| 201 | /******************************************************************************* |
| 202 | * |
| 203 | * FUNCTION: acpi_ns_convert_to_buffer |
| 204 | * |
| 205 | * PARAMETERS: original_object - Object to be converted |
| 206 | * return_object - Where the new converted object is returned |
| 207 | * |
| 208 | * RETURN: Status. AE_OK if conversion was successful. |
| 209 | * |
| 210 | * DESCRIPTION: Attempt to convert a Integer/String/Package object to a Buffer. |
| 211 | * |
| 212 | ******************************************************************************/ |
| 213 | |
| 214 | acpi_status |
| 215 | acpi_ns_convert_to_buffer(union acpi_operand_object *original_object, |
| 216 | union acpi_operand_object **return_object) |
| 217 | { |
| 218 | union acpi_operand_object *new_object; |
| 219 | acpi_status status; |
| 220 | union acpi_operand_object **elements; |
| 221 | u32 *dword_buffer; |
| 222 | u32 count; |
| 223 | u32 i; |
| 224 | |
| 225 | switch (original_object->common.type) { |
| 226 | case ACPI_TYPE_INTEGER: |
| 227 | /* |
| 228 | * Integer-to-Buffer conversion. |
| 229 | * Convert the Integer to a packed-byte buffer. _MAT and other |
| 230 | * objects need this sometimes, if a read has been performed on a |
| 231 | * Field object that is less than or equal to the global integer |
| 232 | * size (32 or 64 bits). |
| 233 | */ |
| 234 | status = |
| 235 | acpi_ex_convert_to_buffer(original_object, &new_object); |
| 236 | if (ACPI_FAILURE(status)) { |
| 237 | return (status); |
| 238 | } |
| 239 | break; |
| 240 | |
| 241 | case ACPI_TYPE_STRING: |
| 242 | |
| 243 | /* String-to-Buffer conversion. Simple data copy */ |
| 244 | |
| 245 | new_object = |
| 246 | acpi_ut_create_buffer_object(original_object->string. |
| 247 | length); |
| 248 | if (!new_object) { |
| 249 | return (AE_NO_MEMORY); |
| 250 | } |
| 251 | |
| 252 | ACPI_MEMCPY(new_object->buffer.pointer, |
| 253 | original_object->string.pointer, |
| 254 | original_object->string.length); |
| 255 | break; |
| 256 | |
| 257 | case ACPI_TYPE_PACKAGE: |
| 258 | /* |
| 259 | * This case is often seen for predefined names that must return a |
| 260 | * Buffer object with multiple DWORD integers within. For example, |
| 261 | * _FDE and _GTM. The Package can be converted to a Buffer. |
| 262 | */ |
| 263 | |
| 264 | /* All elements of the Package must be integers */ |
| 265 | |
| 266 | elements = original_object->package.elements; |
| 267 | count = original_object->package.count; |
| 268 | |
| 269 | for (i = 0; i < count; i++) { |
| 270 | if ((!*elements) || |
| 271 | ((*elements)->common.type != ACPI_TYPE_INTEGER)) { |
| 272 | return (AE_AML_OPERAND_TYPE); |
| 273 | } |
| 274 | elements++; |
| 275 | } |
| 276 | |
| 277 | /* Create the new buffer object to replace the Package */ |
| 278 | |
| 279 | new_object = acpi_ut_create_buffer_object(ACPI_MUL_4(count)); |
| 280 | if (!new_object) { |
| 281 | return (AE_NO_MEMORY); |
| 282 | } |
| 283 | |
| 284 | /* Copy the package elements (integers) to the buffer as DWORDs */ |
| 285 | |
| 286 | elements = original_object->package.elements; |
| 287 | dword_buffer = ACPI_CAST_PTR(u32, new_object->buffer.pointer); |
| 288 | |
| 289 | for (i = 0; i < count; i++) { |
| 290 | *dword_buffer = (u32)(*elements)->integer.value; |
| 291 | dword_buffer++; |
| 292 | elements++; |
| 293 | } |
| 294 | break; |
| 295 | |
| 296 | default: |
| 297 | return (AE_AML_OPERAND_TYPE); |
| 298 | } |
| 299 | |
| 300 | *return_object = new_object; |
| 301 | return (AE_OK); |
| 302 | } |
Lv Zheng | 96b44cc | 2013-03-08 09:23:24 +0000 | [diff] [blame^] | 303 | |
| 304 | /******************************************************************************* |
| 305 | * |
| 306 | * FUNCTION: acpi_ns_convert_to_unicode |
| 307 | * |
| 308 | * PARAMETERS: original_object - ASCII String Object to be converted |
| 309 | * return_object - Where the new converted object is returned |
| 310 | * |
| 311 | * RETURN: Status. AE_OK if conversion was successful. |
| 312 | * |
| 313 | * DESCRIPTION: Attempt to convert a String object to a Unicode string Buffer. |
| 314 | * |
| 315 | ******************************************************************************/ |
| 316 | |
| 317 | acpi_status |
| 318 | acpi_ns_convert_to_unicode(union acpi_operand_object *original_object, |
| 319 | union acpi_operand_object **return_object) |
| 320 | { |
| 321 | union acpi_operand_object *new_object; |
| 322 | char *ascii_string; |
| 323 | u16 *unicode_buffer; |
| 324 | u32 unicode_length; |
| 325 | u32 i; |
| 326 | |
| 327 | if (!original_object) { |
| 328 | return (AE_OK); |
| 329 | } |
| 330 | |
| 331 | /* If a Buffer was returned, it must be at least two bytes long */ |
| 332 | |
| 333 | if (original_object->common.type == ACPI_TYPE_BUFFER) { |
| 334 | if (original_object->buffer.length < 2) { |
| 335 | return (AE_AML_OPERAND_VALUE); |
| 336 | } |
| 337 | |
| 338 | *return_object = NULL; |
| 339 | return (AE_OK); |
| 340 | } |
| 341 | |
| 342 | /* |
| 343 | * The original object is an ASCII string. Convert this string to |
| 344 | * a unicode buffer. |
| 345 | */ |
| 346 | ascii_string = original_object->string.pointer; |
| 347 | unicode_length = (original_object->string.length * 2) + 2; |
| 348 | |
| 349 | /* Create a new buffer object for the Unicode data */ |
| 350 | |
| 351 | new_object = acpi_ut_create_buffer_object(unicode_length); |
| 352 | if (!new_object) { |
| 353 | return (AE_NO_MEMORY); |
| 354 | } |
| 355 | |
| 356 | unicode_buffer = ACPI_CAST_PTR(u16, new_object->buffer.pointer); |
| 357 | |
| 358 | /* Convert ASCII to Unicode */ |
| 359 | |
| 360 | for (i = 0; i < original_object->string.length; i++) { |
| 361 | unicode_buffer[i] = (u16)ascii_string[i]; |
| 362 | } |
| 363 | |
| 364 | *return_object = new_object; |
| 365 | return (AE_OK); |
| 366 | } |