Commit | Line | Data |
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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: exconvrt - Object conversion routines | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
82a80941 | 8 | * Copyright (C) 2000 - 2015, Intel Corp. |
1da177e4 LT |
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 | ||
1da177e4 | 44 | #include <acpi/acpi.h> |
e2f7a777 LB |
45 | #include "accommon.h" |
46 | #include "acinterp.h" | |
47 | #include "amlcode.h" | |
1da177e4 | 48 | |
1da177e4 | 49 | #define _COMPONENT ACPI_EXECUTER |
4be44fcd | 50 | ACPI_MODULE_NAME("exconvrt") |
1da177e4 | 51 | |
44f6c012 | 52 | /* Local prototypes */ |
44f6c012 | 53 | static u32 |
5df7e6cb | 54 | acpi_ex_convert_to_ascii(u64 integer, u16 base, u8 *string, u8 max_length); |
1da177e4 LT |
55 | |
56 | /******************************************************************************* | |
57 | * | |
58 | * FUNCTION: acpi_ex_convert_to_integer | |
59 | * | |
2425a096 | 60 | * PARAMETERS: obj_desc - Object to be converted. Must be an |
1da177e4 LT |
61 | * Integer, Buffer, or String |
62 | * result_desc - Where the new Integer object is returned | |
ba494bee | 63 | * flags - Used for string conversion |
1da177e4 LT |
64 | * |
65 | * RETURN: Status | |
66 | * | |
67 | * DESCRIPTION: Convert an ACPI Object to an integer. | |
68 | * | |
69 | ******************************************************************************/ | |
70 | ||
71 | acpi_status | |
4be44fcd LB |
72 | acpi_ex_convert_to_integer(union acpi_operand_object *obj_desc, |
73 | union acpi_operand_object **result_desc, u32 flags) | |
1da177e4 | 74 | { |
4be44fcd LB |
75 | union acpi_operand_object *return_desc; |
76 | u8 *pointer; | |
5df7e6cb | 77 | u64 result; |
4be44fcd LB |
78 | u32 i; |
79 | u32 count; | |
80 | acpi_status status; | |
1da177e4 | 81 | |
b229cf92 | 82 | ACPI_FUNCTION_TRACE_PTR(ex_convert_to_integer, obj_desc); |
1da177e4 | 83 | |
3371c19c | 84 | switch (obj_desc->common.type) { |
1da177e4 LT |
85 | case ACPI_TYPE_INTEGER: |
86 | ||
87 | /* No conversion necessary */ | |
88 | ||
89 | *result_desc = obj_desc; | |
4be44fcd | 90 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
91 | |
92 | case ACPI_TYPE_BUFFER: | |
93 | case ACPI_TYPE_STRING: | |
94 | ||
95 | /* Note: Takes advantage of common buffer/string fields */ | |
96 | ||
97 | pointer = obj_desc->buffer.pointer; | |
4be44fcd | 98 | count = obj_desc->buffer.length; |
1da177e4 LT |
99 | break; |
100 | ||
101 | default: | |
1d1ea1b7 | 102 | |
4be44fcd | 103 | return_ACPI_STATUS(AE_TYPE); |
1da177e4 LT |
104 | } |
105 | ||
106 | /* | |
2425a096 | 107 | * Convert the buffer/string to an integer. Note that both buffers and |
1da177e4 LT |
108 | * strings are treated as raw data - we don't convert ascii to hex for |
109 | * strings. | |
110 | * | |
111 | * There are two terminating conditions for the loop: | |
112 | * 1) The size of an integer has been reached, or | |
113 | * 2) The end of the buffer or string has been reached | |
114 | */ | |
115 | result = 0; | |
116 | ||
44f6c012 RM |
117 | /* String conversion is different than Buffer conversion */ |
118 | ||
3371c19c | 119 | switch (obj_desc->common.type) { |
1da177e4 | 120 | case ACPI_TYPE_STRING: |
1da177e4 LT |
121 | /* |
122 | * Convert string to an integer - for most cases, the string must be | |
2425a096 | 123 | * hexadecimal as per the ACPI specification. The only exception (as |
1da177e4 LT |
124 | * of ACPI 3.0) is that the to_integer() operator allows both decimal |
125 | * and hexadecimal strings (hex prefixed with "0x"). | |
126 | */ | |
4be44fcd LB |
127 | status = acpi_ut_strtoul64((char *)pointer, flags, &result); |
128 | if (ACPI_FAILURE(status)) { | |
129 | return_ACPI_STATUS(status); | |
1da177e4 LT |
130 | } |
131 | break; | |
132 | ||
1da177e4 LT |
133 | case ACPI_TYPE_BUFFER: |
134 | ||
135 | /* Check for zero-length buffer */ | |
136 | ||
137 | if (!count) { | |
4be44fcd | 138 | return_ACPI_STATUS(AE_AML_BUFFER_LIMIT); |
1da177e4 LT |
139 | } |
140 | ||
141 | /* Transfer no more than an integer's worth of data */ | |
142 | ||
143 | if (count > acpi_gbl_integer_byte_width) { | |
144 | count = acpi_gbl_integer_byte_width; | |
145 | } | |
146 | ||
147 | /* | |
148 | * Convert buffer to an integer - we simply grab enough raw data | |
149 | * from the buffer to fill an integer | |
150 | */ | |
151 | for (i = 0; i < count; i++) { | |
152 | /* | |
153 | * Get next byte and shift it into the Result. | |
154 | * Little endian is used, meaning that the first byte of the buffer | |
155 | * is the LSB of the integer | |
156 | */ | |
5df7e6cb | 157 | result |= (((u64) pointer[i]) << (i * 8)); |
1da177e4 LT |
158 | } |
159 | break; | |
160 | ||
1da177e4 | 161 | default: |
2425a096 | 162 | |
1da177e4 | 163 | /* No other types can get here */ |
1d1ea1b7 | 164 | |
1da177e4 LT |
165 | break; |
166 | } | |
167 | ||
44f6c012 RM |
168 | /* Create a new integer */ |
169 | ||
dc95a270 | 170 | return_desc = acpi_ut_create_integer_object(result); |
1da177e4 | 171 | if (!return_desc) { |
4be44fcd | 172 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
173 | } |
174 | ||
f6dd9221 BM |
175 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n", |
176 | ACPI_FORMAT_UINT64(result))); | |
177 | ||
1da177e4 LT |
178 | /* Save the Result */ |
179 | ||
ef42e53f | 180 | (void)acpi_ex_truncate_for32bit_table(return_desc); |
1da177e4 | 181 | *result_desc = return_desc; |
4be44fcd | 182 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
183 | } |
184 | ||
1da177e4 LT |
185 | /******************************************************************************* |
186 | * | |
187 | * FUNCTION: acpi_ex_convert_to_buffer | |
188 | * | |
2425a096 | 189 | * PARAMETERS: obj_desc - Object to be converted. Must be an |
1da177e4 LT |
190 | * Integer, Buffer, or String |
191 | * result_desc - Where the new buffer object is returned | |
192 | * | |
193 | * RETURN: Status | |
194 | * | |
195 | * DESCRIPTION: Convert an ACPI Object to a Buffer | |
196 | * | |
197 | ******************************************************************************/ | |
198 | ||
199 | acpi_status | |
4be44fcd LB |
200 | acpi_ex_convert_to_buffer(union acpi_operand_object *obj_desc, |
201 | union acpi_operand_object **result_desc) | |
1da177e4 | 202 | { |
4be44fcd LB |
203 | union acpi_operand_object *return_desc; |
204 | u8 *new_buf; | |
1da177e4 | 205 | |
b229cf92 | 206 | ACPI_FUNCTION_TRACE_PTR(ex_convert_to_buffer, obj_desc); |
1da177e4 | 207 | |
3371c19c | 208 | switch (obj_desc->common.type) { |
1da177e4 LT |
209 | case ACPI_TYPE_BUFFER: |
210 | ||
211 | /* No conversion necessary */ | |
212 | ||
213 | *result_desc = obj_desc; | |
4be44fcd | 214 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
215 | |
216 | case ACPI_TYPE_INTEGER: | |
1da177e4 LT |
217 | /* |
218 | * Create a new Buffer object. | |
219 | * Need enough space for one integer | |
220 | */ | |
4be44fcd LB |
221 | return_desc = |
222 | acpi_ut_create_buffer_object(acpi_gbl_integer_byte_width); | |
1da177e4 | 223 | if (!return_desc) { |
4be44fcd | 224 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
225 | } |
226 | ||
227 | /* Copy the integer to the buffer, LSB first */ | |
228 | ||
229 | new_buf = return_desc->buffer.pointer; | |
4fa4616e BM |
230 | memcpy(new_buf, |
231 | &obj_desc->integer.value, acpi_gbl_integer_byte_width); | |
1da177e4 LT |
232 | break; |
233 | ||
1da177e4 | 234 | case ACPI_TYPE_STRING: |
1da177e4 LT |
235 | /* |
236 | * Create a new Buffer object | |
237 | * Size will be the string length | |
238 | * | |
239 | * NOTE: Add one to the string length to include the null terminator. | |
240 | * The ACPI spec is unclear on this subject, but there is existing | |
241 | * ASL/AML code that depends on the null being transferred to the new | |
242 | * buffer. | |
243 | */ | |
4be44fcd LB |
244 | return_desc = acpi_ut_create_buffer_object((acpi_size) |
245 | obj_desc->string. | |
246 | length + 1); | |
1da177e4 | 247 | if (!return_desc) { |
4be44fcd | 248 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
249 | } |
250 | ||
251 | /* Copy the string to the buffer */ | |
252 | ||
253 | new_buf = return_desc->buffer.pointer; | |
4fa4616e BM |
254 | strncpy((char *)new_buf, (char *)obj_desc->string.pointer, |
255 | obj_desc->string.length); | |
1da177e4 LT |
256 | break; |
257 | ||
1da177e4 | 258 | default: |
1d1ea1b7 | 259 | |
4be44fcd | 260 | return_ACPI_STATUS(AE_TYPE); |
1da177e4 LT |
261 | } |
262 | ||
263 | /* Mark buffer initialized */ | |
264 | ||
265 | return_desc->common.flags |= AOPOBJ_DATA_VALID; | |
266 | *result_desc = return_desc; | |
4be44fcd | 267 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
268 | } |
269 | ||
1da177e4 LT |
270 | /******************************************************************************* |
271 | * | |
272 | * FUNCTION: acpi_ex_convert_to_ascii | |
273 | * | |
ba494bee BM |
274 | * PARAMETERS: integer - Value to be converted |
275 | * base - ACPI_STRING_DECIMAL or ACPI_STRING_HEX | |
276 | * string - Where the string is returned | |
1da177e4 LT |
277 | * data_width - Size of data item to be converted, in bytes |
278 | * | |
279 | * RETURN: Actual string length | |
280 | * | |
281 | * DESCRIPTION: Convert an ACPI Integer to a hex or decimal string | |
282 | * | |
283 | ******************************************************************************/ | |
284 | ||
44f6c012 | 285 | static u32 |
5df7e6cb | 286 | acpi_ex_convert_to_ascii(u64 integer, u16 base, u8 *string, u8 data_width) |
1da177e4 | 287 | { |
5df7e6cb | 288 | u64 digit; |
67a119f9 BM |
289 | u32 i; |
290 | u32 j; | |
291 | u32 k = 0; | |
292 | u32 hex_length; | |
293 | u32 decimal_length; | |
4be44fcd LB |
294 | u32 remainder; |
295 | u8 supress_zeros; | |
1da177e4 | 296 | |
4be44fcd | 297 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
298 | |
299 | switch (base) { | |
300 | case 10: | |
301 | ||
302 | /* Setup max length for the decimal number */ | |
303 | ||
304 | switch (data_width) { | |
305 | case 1: | |
1d1ea1b7 | 306 | |
1da177e4 LT |
307 | decimal_length = ACPI_MAX8_DECIMAL_DIGITS; |
308 | break; | |
309 | ||
310 | case 4: | |
1d1ea1b7 | 311 | |
1da177e4 LT |
312 | decimal_length = ACPI_MAX32_DECIMAL_DIGITS; |
313 | break; | |
314 | ||
315 | case 8: | |
316 | default: | |
1d1ea1b7 | 317 | |
1da177e4 LT |
318 | decimal_length = ACPI_MAX64_DECIMAL_DIGITS; |
319 | break; | |
320 | } | |
321 | ||
4be44fcd | 322 | supress_zeros = TRUE; /* No leading zeros */ |
1da177e4 LT |
323 | remainder = 0; |
324 | ||
325 | for (i = decimal_length; i > 0; i--) { | |
52fc0b02 | 326 | |
1da177e4 LT |
327 | /* Divide by nth factor of 10 */ |
328 | ||
329 | digit = integer; | |
330 | for (j = 0; j < i; j++) { | |
4be44fcd LB |
331 | (void)acpi_ut_short_divide(digit, 10, &digit, |
332 | &remainder); | |
1da177e4 LT |
333 | } |
334 | ||
335 | /* Handle leading zeros */ | |
336 | ||
337 | if (remainder != 0) { | |
338 | supress_zeros = FALSE; | |
339 | } | |
340 | ||
341 | if (!supress_zeros) { | |
342 | string[k] = (u8) (ACPI_ASCII_ZERO + remainder); | |
343 | k++; | |
344 | } | |
345 | } | |
346 | break; | |
347 | ||
348 | case 16: | |
349 | ||
44f6c012 | 350 | /* hex_length: 2 ascii hex chars per data byte */ |
1da177e4 | 351 | |
67a119f9 | 352 | hex_length = ACPI_MUL_2(data_width); |
4be44fcd | 353 | for (i = 0, j = (hex_length - 1); i < hex_length; i++, j--) { |
52fc0b02 | 354 | |
1da177e4 LT |
355 | /* Get one hex digit, most significant digits first */ |
356 | ||
4be44fcd LB |
357 | string[k] = |
358 | (u8) acpi_ut_hex_to_ascii_char(integer, | |
359 | ACPI_MUL_4(j)); | |
1da177e4 LT |
360 | k++; |
361 | } | |
362 | break; | |
363 | ||
364 | default: | |
365 | return (0); | |
366 | } | |
367 | ||
368 | /* | |
2425a096 | 369 | * Since leading zeros are suppressed, we must check for the case where |
1da177e4 LT |
370 | * the integer equals 0 |
371 | * | |
372 | * Finally, null terminate the string and return the length | |
373 | */ | |
374 | if (!k) { | |
4be44fcd | 375 | string[0] = ACPI_ASCII_ZERO; |
1da177e4 LT |
376 | k = 1; |
377 | } | |
378 | ||
4be44fcd | 379 | string[k] = 0; |
1da177e4 LT |
380 | return ((u32) k); |
381 | } | |
382 | ||
1da177e4 LT |
383 | /******************************************************************************* |
384 | * | |
385 | * FUNCTION: acpi_ex_convert_to_string | |
386 | * | |
2425a096 | 387 | * PARAMETERS: obj_desc - Object to be converted. Must be an |
1da177e4 LT |
388 | * Integer, Buffer, or String |
389 | * result_desc - Where the string object is returned | |
ba494bee | 390 | * type - String flags (base and conversion type) |
1da177e4 LT |
391 | * |
392 | * RETURN: Status | |
393 | * | |
394 | * DESCRIPTION: Convert an ACPI Object to a string | |
395 | * | |
396 | ******************************************************************************/ | |
397 | ||
398 | acpi_status | |
4be44fcd LB |
399 | acpi_ex_convert_to_string(union acpi_operand_object * obj_desc, |
400 | union acpi_operand_object ** result_desc, u32 type) | |
1da177e4 | 401 | { |
4be44fcd LB |
402 | union acpi_operand_object *return_desc; |
403 | u8 *new_buf; | |
404 | u32 i; | |
405 | u32 string_length = 0; | |
406 | u16 base = 16; | |
407 | u8 separator = ','; | |
1da177e4 | 408 | |
b229cf92 | 409 | ACPI_FUNCTION_TRACE_PTR(ex_convert_to_string, obj_desc); |
1da177e4 | 410 | |
3371c19c | 411 | switch (obj_desc->common.type) { |
1da177e4 LT |
412 | case ACPI_TYPE_STRING: |
413 | ||
414 | /* No conversion necessary */ | |
415 | ||
416 | *result_desc = obj_desc; | |
4be44fcd | 417 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
418 | |
419 | case ACPI_TYPE_INTEGER: | |
420 | ||
421 | switch (type) { | |
422 | case ACPI_EXPLICIT_CONVERT_DECIMAL: | |
423 | ||
424 | /* Make room for maximum decimal number */ | |
425 | ||
426 | string_length = ACPI_MAX_DECIMAL_DIGITS; | |
427 | base = 10; | |
428 | break; | |
429 | ||
430 | default: | |
431 | ||
432 | /* Two hex string characters for each integer byte */ | |
433 | ||
4be44fcd | 434 | string_length = ACPI_MUL_2(acpi_gbl_integer_byte_width); |
1da177e4 LT |
435 | break; |
436 | } | |
437 | ||
438 | /* | |
439 | * Create a new String | |
440 | * Need enough space for one ASCII integer (plus null terminator) | |
441 | */ | |
4be44fcd LB |
442 | return_desc = |
443 | acpi_ut_create_string_object((acpi_size) string_length); | |
1da177e4 | 444 | if (!return_desc) { |
4be44fcd | 445 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
446 | } |
447 | ||
448 | new_buf = return_desc->buffer.pointer; | |
449 | ||
450 | /* Convert integer to string */ | |
451 | ||
4be44fcd LB |
452 | string_length = |
453 | acpi_ex_convert_to_ascii(obj_desc->integer.value, base, | |
454 | new_buf, | |
455 | acpi_gbl_integer_byte_width); | |
1da177e4 LT |
456 | |
457 | /* Null terminate at the correct place */ | |
458 | ||
459 | return_desc->string.length = string_length; | |
4be44fcd | 460 | new_buf[string_length] = 0; |
1da177e4 LT |
461 | break; |
462 | ||
1da177e4 LT |
463 | case ACPI_TYPE_BUFFER: |
464 | ||
465 | /* Setup string length, base, and separator */ | |
466 | ||
467 | switch (type) { | |
4be44fcd | 468 | case ACPI_EXPLICIT_CONVERT_DECIMAL: /* Used by to_decimal_string */ |
1da177e4 LT |
469 | /* |
470 | * From ACPI: "If Data is a buffer, it is converted to a string of | |
471 | * decimal values separated by commas." | |
472 | */ | |
473 | base = 10; | |
474 | ||
475 | /* | |
2425a096 | 476 | * Calculate the final string length. Individual string values |
1da177e4 LT |
477 | * are variable length (include separator for each) |
478 | */ | |
479 | for (i = 0; i < obj_desc->buffer.length; i++) { | |
480 | if (obj_desc->buffer.pointer[i] >= 100) { | |
481 | string_length += 4; | |
4be44fcd | 482 | } else if (obj_desc->buffer.pointer[i] >= 10) { |
1da177e4 | 483 | string_length += 3; |
4be44fcd | 484 | } else { |
1da177e4 LT |
485 | string_length += 2; |
486 | } | |
487 | } | |
488 | break; | |
489 | ||
490 | case ACPI_IMPLICIT_CONVERT_HEX: | |
491 | /* | |
492 | * From the ACPI spec: | |
493 | *"The entire contents of the buffer are converted to a string of | |
494 | * two-character hexadecimal numbers, each separated by a space." | |
495 | */ | |
496 | separator = ' '; | |
497 | string_length = (obj_desc->buffer.length * 3); | |
498 | break; | |
499 | ||
4be44fcd | 500 | case ACPI_EXPLICIT_CONVERT_HEX: /* Used by to_hex_string */ |
1da177e4 LT |
501 | /* |
502 | * From ACPI: "If Data is a buffer, it is converted to a string of | |
503 | * hexadecimal values separated by commas." | |
504 | */ | |
505 | string_length = (obj_desc->buffer.length * 3); | |
506 | break; | |
507 | ||
508 | default: | |
4be44fcd | 509 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
510 | } |
511 | ||
512 | /* | |
c51a4de8 | 513 | * Create a new string object and string buffer |
1da177e4 | 514 | * (-1 because of extra separator included in string_length from above) |
4ca846e9 | 515 | * Allow creation of zero-length strings from zero-length buffers. |
1da177e4 | 516 | */ |
4ca846e9 BM |
517 | if (string_length) { |
518 | string_length--; | |
519 | } | |
520 | ||
1f86e8c1 LZ |
521 | return_desc = |
522 | acpi_ut_create_string_object((acpi_size) string_length); | |
1da177e4 | 523 | if (!return_desc) { |
4be44fcd | 524 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
525 | } |
526 | ||
527 | new_buf = return_desc->buffer.pointer; | |
528 | ||
529 | /* | |
530 | * Convert buffer bytes to hex or decimal values | |
531 | * (separated by commas or spaces) | |
532 | */ | |
533 | for (i = 0; i < obj_desc->buffer.length; i++) { | |
5df7e6cb BM |
534 | new_buf += acpi_ex_convert_to_ascii((u64) obj_desc-> |
535 | buffer.pointer[i], | |
536 | base, new_buf, 1); | |
4be44fcd | 537 | *new_buf++ = separator; /* each separated by a comma or space */ |
1da177e4 LT |
538 | } |
539 | ||
44f6c012 RM |
540 | /* |
541 | * Null terminate the string | |
542 | * (overwrites final comma/space from above) | |
543 | */ | |
4ca846e9 BM |
544 | if (obj_desc->buffer.length) { |
545 | new_buf--; | |
546 | } | |
1da177e4 LT |
547 | *new_buf = 0; |
548 | break; | |
549 | ||
550 | default: | |
1d1ea1b7 | 551 | |
4be44fcd | 552 | return_ACPI_STATUS(AE_TYPE); |
1da177e4 LT |
553 | } |
554 | ||
555 | *result_desc = return_desc; | |
4be44fcd | 556 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
557 | } |
558 | ||
1da177e4 LT |
559 | /******************************************************************************* |
560 | * | |
561 | * FUNCTION: acpi_ex_convert_to_target_type | |
562 | * | |
563 | * PARAMETERS: destination_type - Current type of the destination | |
564 | * source_desc - Source object to be converted. | |
565 | * result_desc - Where the converted object is returned | |
566 | * walk_state - Current method state | |
567 | * | |
568 | * RETURN: Status | |
569 | * | |
570 | * DESCRIPTION: Implements "implicit conversion" rules for storing an object. | |
571 | * | |
572 | ******************************************************************************/ | |
573 | ||
574 | acpi_status | |
4be44fcd LB |
575 | acpi_ex_convert_to_target_type(acpi_object_type destination_type, |
576 | union acpi_operand_object *source_desc, | |
577 | union acpi_operand_object **result_desc, | |
578 | struct acpi_walk_state *walk_state) | |
1da177e4 | 579 | { |
4be44fcd | 580 | acpi_status status = AE_OK; |
1da177e4 | 581 | |
b229cf92 | 582 | ACPI_FUNCTION_TRACE(ex_convert_to_target_type); |
1da177e4 LT |
583 | |
584 | /* Default behavior */ | |
585 | ||
586 | *result_desc = source_desc; | |
587 | ||
588 | /* | |
589 | * If required by the target, | |
590 | * perform implicit conversion on the source before we store it. | |
591 | */ | |
4be44fcd | 592 | switch (GET_CURRENT_ARG_TYPE(walk_state->op_info->runtime_args)) { |
1da177e4 LT |
593 | case ARGI_SIMPLE_TARGET: |
594 | case ARGI_FIXED_TARGET: | |
4be44fcd | 595 | case ARGI_INTEGER_REF: /* Handles Increment, Decrement cases */ |
1da177e4 LT |
596 | |
597 | switch (destination_type) { | |
598 | case ACPI_TYPE_LOCAL_REGION_FIELD: | |
599 | /* | |
600 | * Named field can always handle conversions | |
601 | */ | |
602 | break; | |
603 | ||
604 | default: | |
1d1ea1b7 | 605 | |
1da177e4 LT |
606 | /* No conversion allowed for these types */ |
607 | ||
3371c19c | 608 | if (destination_type != source_desc->common.type) { |
4be44fcd LB |
609 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
610 | "Explicit operator, will store (%s) over existing type (%s)\n", | |
611 | acpi_ut_get_object_type_name | |
612 | (source_desc), | |
613 | acpi_ut_get_type_name | |
614 | (destination_type))); | |
1da177e4 LT |
615 | status = AE_TYPE; |
616 | } | |
617 | } | |
618 | break; | |
619 | ||
1da177e4 LT |
620 | case ARGI_TARGETREF: |
621 | ||
622 | switch (destination_type) { | |
623 | case ACPI_TYPE_INTEGER: | |
624 | case ACPI_TYPE_BUFFER_FIELD: | |
625 | case ACPI_TYPE_LOCAL_BANK_FIELD: | |
626 | case ACPI_TYPE_LOCAL_INDEX_FIELD: | |
627 | /* | |
2425a096 | 628 | * These types require an Integer operand. We can convert |
1da177e4 LT |
629 | * a Buffer or a String to an Integer if necessary. |
630 | */ | |
4be44fcd LB |
631 | status = |
632 | acpi_ex_convert_to_integer(source_desc, result_desc, | |
633 | 16); | |
1da177e4 LT |
634 | break; |
635 | ||
1da177e4 | 636 | case ACPI_TYPE_STRING: |
1da177e4 | 637 | /* |
2425a096 | 638 | * The operand must be a String. We can convert an |
1da177e4 LT |
639 | * Integer or Buffer if necessary |
640 | */ | |
4be44fcd LB |
641 | status = |
642 | acpi_ex_convert_to_string(source_desc, result_desc, | |
643 | ACPI_IMPLICIT_CONVERT_HEX); | |
1da177e4 LT |
644 | break; |
645 | ||
1da177e4 | 646 | case ACPI_TYPE_BUFFER: |
1da177e4 | 647 | /* |
2425a096 | 648 | * The operand must be a Buffer. We can convert an |
1da177e4 LT |
649 | * Integer or String if necessary |
650 | */ | |
4be44fcd LB |
651 | status = |
652 | acpi_ex_convert_to_buffer(source_desc, result_desc); | |
1da177e4 LT |
653 | break; |
654 | ||
1da177e4 | 655 | default: |
1d1ea1b7 | 656 | |
b8e4d893 | 657 | ACPI_ERROR((AE_INFO, |
f6a22b0b | 658 | "Bad destination type during conversion: 0x%X", |
b8e4d893 | 659 | destination_type)); |
1da177e4 LT |
660 | status = AE_AML_INTERNAL; |
661 | break; | |
662 | } | |
663 | break; | |
664 | ||
1da177e4 LT |
665 | case ARGI_REFERENCE: |
666 | /* | |
667 | * create_xxxx_field cases - we are storing the field object into the name | |
668 | */ | |
669 | break; | |
670 | ||
1da177e4 | 671 | default: |
1d1ea1b7 | 672 | |
b8e4d893 | 673 | ACPI_ERROR((AE_INFO, |
f6a22b0b | 674 | "Unknown Target type ID 0x%X AmlOpcode 0x%X DestType %s", |
b8e4d893 BM |
675 | GET_CURRENT_ARG_TYPE(walk_state->op_info-> |
676 | runtime_args), | |
677 | walk_state->opcode, | |
678 | acpi_ut_get_type_name(destination_type))); | |
4a90c7e8 | 679 | status = AE_AML_INTERNAL; |
1da177e4 LT |
680 | } |
681 | ||
682 | /* | |
683 | * Source-to-Target conversion semantics: | |
684 | * | |
685 | * If conversion to the target type cannot be performed, then simply | |
686 | * overwrite the target with the new object and type. | |
687 | */ | |
688 | if (status == AE_TYPE) { | |
689 | status = AE_OK; | |
690 | } | |
691 | ||
4be44fcd | 692 | return_ACPI_STATUS(status); |
1da177e4 | 693 | } |