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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: exconvrt - Object conversion routines | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
b4e104ea | 8 | * Copyright (C) 2000 - 2011, 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 | |
63 | * Flags - Used for string conversion | |
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: | |
4be44fcd | 102 | return_ACPI_STATUS(AE_TYPE); |
1da177e4 LT |
103 | } |
104 | ||
105 | /* | |
2425a096 | 106 | * Convert the buffer/string to an integer. Note that both buffers and |
1da177e4 LT |
107 | * strings are treated as raw data - we don't convert ascii to hex for |
108 | * strings. | |
109 | * | |
110 | * There are two terminating conditions for the loop: | |
111 | * 1) The size of an integer has been reached, or | |
112 | * 2) The end of the buffer or string has been reached | |
113 | */ | |
114 | result = 0; | |
115 | ||
44f6c012 RM |
116 | /* String conversion is different than Buffer conversion */ |
117 | ||
3371c19c | 118 | switch (obj_desc->common.type) { |
1da177e4 LT |
119 | case ACPI_TYPE_STRING: |
120 | ||
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 LT |
163 | /* No other types can get here */ |
164 | break; | |
165 | } | |
166 | ||
44f6c012 RM |
167 | /* Create a new integer */ |
168 | ||
dc95a270 | 169 | return_desc = acpi_ut_create_integer_object(result); |
1da177e4 | 170 | if (!return_desc) { |
4be44fcd | 171 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
172 | } |
173 | ||
f6dd9221 BM |
174 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n", |
175 | ACPI_FORMAT_UINT64(result))); | |
176 | ||
1da177e4 LT |
177 | /* Save the Result */ |
178 | ||
4be44fcd | 179 | acpi_ex_truncate_for32bit_table(return_desc); |
1da177e4 | 180 | *result_desc = return_desc; |
4be44fcd | 181 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
182 | } |
183 | ||
1da177e4 LT |
184 | /******************************************************************************* |
185 | * | |
186 | * FUNCTION: acpi_ex_convert_to_buffer | |
187 | * | |
2425a096 | 188 | * PARAMETERS: obj_desc - Object to be converted. Must be an |
1da177e4 LT |
189 | * Integer, Buffer, or String |
190 | * result_desc - Where the new buffer object is returned | |
191 | * | |
192 | * RETURN: Status | |
193 | * | |
194 | * DESCRIPTION: Convert an ACPI Object to a Buffer | |
195 | * | |
196 | ******************************************************************************/ | |
197 | ||
198 | acpi_status | |
4be44fcd LB |
199 | acpi_ex_convert_to_buffer(union acpi_operand_object *obj_desc, |
200 | union acpi_operand_object **result_desc) | |
1da177e4 | 201 | { |
4be44fcd LB |
202 | union acpi_operand_object *return_desc; |
203 | u8 *new_buf; | |
1da177e4 | 204 | |
b229cf92 | 205 | ACPI_FUNCTION_TRACE_PTR(ex_convert_to_buffer, obj_desc); |
1da177e4 | 206 | |
3371c19c | 207 | switch (obj_desc->common.type) { |
1da177e4 LT |
208 | case ACPI_TYPE_BUFFER: |
209 | ||
210 | /* No conversion necessary */ | |
211 | ||
212 | *result_desc = obj_desc; | |
4be44fcd | 213 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
214 | |
215 | case ACPI_TYPE_INTEGER: | |
216 | ||
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; | |
4be44fcd LB |
230 | ACPI_MEMCPY(new_buf, |
231 | &obj_desc->integer.value, | |
232 | acpi_gbl_integer_byte_width); | |
1da177e4 LT |
233 | break; |
234 | ||
1da177e4 LT |
235 | case ACPI_TYPE_STRING: |
236 | ||
237 | /* | |
238 | * Create a new Buffer object | |
239 | * Size will be the string length | |
240 | * | |
241 | * NOTE: Add one to the string length to include the null terminator. | |
242 | * The ACPI spec is unclear on this subject, but there is existing | |
243 | * ASL/AML code that depends on the null being transferred to the new | |
244 | * buffer. | |
245 | */ | |
4be44fcd LB |
246 | return_desc = acpi_ut_create_buffer_object((acpi_size) |
247 | obj_desc->string. | |
248 | length + 1); | |
1da177e4 | 249 | if (!return_desc) { |
4be44fcd | 250 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
251 | } |
252 | ||
253 | /* Copy the string to the buffer */ | |
254 | ||
255 | new_buf = return_desc->buffer.pointer; | |
4be44fcd LB |
256 | ACPI_STRNCPY((char *)new_buf, (char *)obj_desc->string.pointer, |
257 | obj_desc->string.length); | |
1da177e4 LT |
258 | break; |
259 | ||
1da177e4 | 260 | default: |
4be44fcd | 261 | return_ACPI_STATUS(AE_TYPE); |
1da177e4 LT |
262 | } |
263 | ||
264 | /* Mark buffer initialized */ | |
265 | ||
266 | return_desc->common.flags |= AOPOBJ_DATA_VALID; | |
267 | *result_desc = return_desc; | |
4be44fcd | 268 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
269 | } |
270 | ||
1da177e4 LT |
271 | /******************************************************************************* |
272 | * | |
273 | * FUNCTION: acpi_ex_convert_to_ascii | |
274 | * | |
275 | * PARAMETERS: Integer - Value to be converted | |
276 | * Base - ACPI_STRING_DECIMAL or ACPI_STRING_HEX | |
277 | * String - Where the string is returned | |
278 | * data_width - Size of data item to be converted, in bytes | |
279 | * | |
280 | * RETURN: Actual string length | |
281 | * | |
282 | * DESCRIPTION: Convert an ACPI Integer to a hex or decimal string | |
283 | * | |
284 | ******************************************************************************/ | |
285 | ||
44f6c012 | 286 | static u32 |
5df7e6cb | 287 | acpi_ex_convert_to_ascii(u64 integer, u16 base, u8 *string, u8 data_width) |
1da177e4 | 288 | { |
5df7e6cb | 289 | u64 digit; |
67a119f9 BM |
290 | u32 i; |
291 | u32 j; | |
292 | u32 k = 0; | |
293 | u32 hex_length; | |
294 | u32 decimal_length; | |
4be44fcd LB |
295 | u32 remainder; |
296 | u8 supress_zeros; | |
1da177e4 | 297 | |
4be44fcd | 298 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
299 | |
300 | switch (base) { | |
301 | case 10: | |
302 | ||
303 | /* Setup max length for the decimal number */ | |
304 | ||
305 | switch (data_width) { | |
306 | case 1: | |
307 | decimal_length = ACPI_MAX8_DECIMAL_DIGITS; | |
308 | break; | |
309 | ||
310 | case 4: | |
311 | decimal_length = ACPI_MAX32_DECIMAL_DIGITS; | |
312 | break; | |
313 | ||
314 | case 8: | |
315 | default: | |
316 | decimal_length = ACPI_MAX64_DECIMAL_DIGITS; | |
317 | break; | |
318 | } | |
319 | ||
4be44fcd | 320 | supress_zeros = TRUE; /* No leading zeros */ |
1da177e4 LT |
321 | remainder = 0; |
322 | ||
323 | for (i = decimal_length; i > 0; i--) { | |
52fc0b02 | 324 | |
1da177e4 LT |
325 | /* Divide by nth factor of 10 */ |
326 | ||
327 | digit = integer; | |
328 | for (j = 0; j < i; j++) { | |
4be44fcd LB |
329 | (void)acpi_ut_short_divide(digit, 10, &digit, |
330 | &remainder); | |
1da177e4 LT |
331 | } |
332 | ||
333 | /* Handle leading zeros */ | |
334 | ||
335 | if (remainder != 0) { | |
336 | supress_zeros = FALSE; | |
337 | } | |
338 | ||
339 | if (!supress_zeros) { | |
340 | string[k] = (u8) (ACPI_ASCII_ZERO + remainder); | |
341 | k++; | |
342 | } | |
343 | } | |
344 | break; | |
345 | ||
346 | case 16: | |
347 | ||
44f6c012 | 348 | /* hex_length: 2 ascii hex chars per data byte */ |
1da177e4 | 349 | |
67a119f9 | 350 | hex_length = ACPI_MUL_2(data_width); |
4be44fcd | 351 | for (i = 0, j = (hex_length - 1); i < hex_length; i++, j--) { |
52fc0b02 | 352 | |
1da177e4 LT |
353 | /* Get one hex digit, most significant digits first */ |
354 | ||
4be44fcd LB |
355 | string[k] = |
356 | (u8) acpi_ut_hex_to_ascii_char(integer, | |
357 | ACPI_MUL_4(j)); | |
1da177e4 LT |
358 | k++; |
359 | } | |
360 | break; | |
361 | ||
362 | default: | |
363 | return (0); | |
364 | } | |
365 | ||
366 | /* | |
2425a096 | 367 | * Since leading zeros are suppressed, we must check for the case where |
1da177e4 LT |
368 | * the integer equals 0 |
369 | * | |
370 | * Finally, null terminate the string and return the length | |
371 | */ | |
372 | if (!k) { | |
4be44fcd | 373 | string[0] = ACPI_ASCII_ZERO; |
1da177e4 LT |
374 | k = 1; |
375 | } | |
376 | ||
4be44fcd | 377 | string[k] = 0; |
1da177e4 LT |
378 | return ((u32) k); |
379 | } | |
380 | ||
1da177e4 LT |
381 | /******************************************************************************* |
382 | * | |
383 | * FUNCTION: acpi_ex_convert_to_string | |
384 | * | |
2425a096 | 385 | * PARAMETERS: obj_desc - Object to be converted. Must be an |
1da177e4 LT |
386 | * Integer, Buffer, or String |
387 | * result_desc - Where the string object is returned | |
388 | * Type - String flags (base and conversion type) | |
389 | * | |
390 | * RETURN: Status | |
391 | * | |
392 | * DESCRIPTION: Convert an ACPI Object to a string | |
393 | * | |
394 | ******************************************************************************/ | |
395 | ||
396 | acpi_status | |
4be44fcd LB |
397 | acpi_ex_convert_to_string(union acpi_operand_object * obj_desc, |
398 | union acpi_operand_object ** result_desc, u32 type) | |
1da177e4 | 399 | { |
4be44fcd LB |
400 | union acpi_operand_object *return_desc; |
401 | u8 *new_buf; | |
402 | u32 i; | |
403 | u32 string_length = 0; | |
404 | u16 base = 16; | |
405 | u8 separator = ','; | |
1da177e4 | 406 | |
b229cf92 | 407 | ACPI_FUNCTION_TRACE_PTR(ex_convert_to_string, obj_desc); |
1da177e4 | 408 | |
3371c19c | 409 | switch (obj_desc->common.type) { |
1da177e4 LT |
410 | case ACPI_TYPE_STRING: |
411 | ||
412 | /* No conversion necessary */ | |
413 | ||
414 | *result_desc = obj_desc; | |
4be44fcd | 415 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
416 | |
417 | case ACPI_TYPE_INTEGER: | |
418 | ||
419 | switch (type) { | |
420 | case ACPI_EXPLICIT_CONVERT_DECIMAL: | |
421 | ||
422 | /* Make room for maximum decimal number */ | |
423 | ||
424 | string_length = ACPI_MAX_DECIMAL_DIGITS; | |
425 | base = 10; | |
426 | break; | |
427 | ||
428 | default: | |
429 | ||
430 | /* Two hex string characters for each integer byte */ | |
431 | ||
4be44fcd | 432 | string_length = ACPI_MUL_2(acpi_gbl_integer_byte_width); |
1da177e4 LT |
433 | break; |
434 | } | |
435 | ||
436 | /* | |
437 | * Create a new String | |
438 | * Need enough space for one ASCII integer (plus null terminator) | |
439 | */ | |
4be44fcd LB |
440 | return_desc = |
441 | acpi_ut_create_string_object((acpi_size) string_length); | |
1da177e4 | 442 | if (!return_desc) { |
4be44fcd | 443 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
444 | } |
445 | ||
446 | new_buf = return_desc->buffer.pointer; | |
447 | ||
448 | /* Convert integer to string */ | |
449 | ||
4be44fcd LB |
450 | string_length = |
451 | acpi_ex_convert_to_ascii(obj_desc->integer.value, base, | |
452 | new_buf, | |
453 | acpi_gbl_integer_byte_width); | |
1da177e4 LT |
454 | |
455 | /* Null terminate at the correct place */ | |
456 | ||
457 | return_desc->string.length = string_length; | |
4be44fcd | 458 | new_buf[string_length] = 0; |
1da177e4 LT |
459 | break; |
460 | ||
1da177e4 LT |
461 | case ACPI_TYPE_BUFFER: |
462 | ||
463 | /* Setup string length, base, and separator */ | |
464 | ||
465 | switch (type) { | |
4be44fcd | 466 | case ACPI_EXPLICIT_CONVERT_DECIMAL: /* Used by to_decimal_string */ |
1da177e4 LT |
467 | /* |
468 | * From ACPI: "If Data is a buffer, it is converted to a string of | |
469 | * decimal values separated by commas." | |
470 | */ | |
471 | base = 10; | |
472 | ||
473 | /* | |
2425a096 | 474 | * Calculate the final string length. Individual string values |
1da177e4 LT |
475 | * are variable length (include separator for each) |
476 | */ | |
477 | for (i = 0; i < obj_desc->buffer.length; i++) { | |
478 | if (obj_desc->buffer.pointer[i] >= 100) { | |
479 | string_length += 4; | |
4be44fcd | 480 | } else if (obj_desc->buffer.pointer[i] >= 10) { |
1da177e4 | 481 | string_length += 3; |
4be44fcd | 482 | } else { |
1da177e4 LT |
483 | string_length += 2; |
484 | } | |
485 | } | |
486 | break; | |
487 | ||
488 | case ACPI_IMPLICIT_CONVERT_HEX: | |
489 | /* | |
490 | * From the ACPI spec: | |
491 | *"The entire contents of the buffer are converted to a string of | |
492 | * two-character hexadecimal numbers, each separated by a space." | |
493 | */ | |
494 | separator = ' '; | |
495 | string_length = (obj_desc->buffer.length * 3); | |
496 | break; | |
497 | ||
4be44fcd | 498 | case ACPI_EXPLICIT_CONVERT_HEX: /* Used by to_hex_string */ |
1da177e4 LT |
499 | /* |
500 | * From ACPI: "If Data is a buffer, it is converted to a string of | |
501 | * hexadecimal values separated by commas." | |
502 | */ | |
503 | string_length = (obj_desc->buffer.length * 3); | |
504 | break; | |
505 | ||
506 | default: | |
4be44fcd | 507 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
508 | } |
509 | ||
510 | /* | |
c51a4de8 | 511 | * Create a new string object and string buffer |
1da177e4 | 512 | * (-1 because of extra separator included in string_length from above) |
4ca846e9 | 513 | * Allow creation of zero-length strings from zero-length buffers. |
1da177e4 | 514 | */ |
4ca846e9 BM |
515 | if (string_length) { |
516 | string_length--; | |
517 | } | |
518 | ||
fd350943 | 519 | return_desc = acpi_ut_create_string_object((acpi_size) |
4ca846e9 | 520 | string_length); |
1da177e4 | 521 | if (!return_desc) { |
4be44fcd | 522 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
523 | } |
524 | ||
525 | new_buf = return_desc->buffer.pointer; | |
526 | ||
527 | /* | |
528 | * Convert buffer bytes to hex or decimal values | |
529 | * (separated by commas or spaces) | |
530 | */ | |
531 | for (i = 0; i < obj_desc->buffer.length; i++) { | |
5df7e6cb BM |
532 | new_buf += acpi_ex_convert_to_ascii((u64) obj_desc-> |
533 | buffer.pointer[i], | |
534 | base, new_buf, 1); | |
4be44fcd | 535 | *new_buf++ = separator; /* each separated by a comma or space */ |
1da177e4 LT |
536 | } |
537 | ||
44f6c012 RM |
538 | /* |
539 | * Null terminate the string | |
540 | * (overwrites final comma/space from above) | |
541 | */ | |
4ca846e9 BM |
542 | if (obj_desc->buffer.length) { |
543 | new_buf--; | |
544 | } | |
1da177e4 LT |
545 | *new_buf = 0; |
546 | break; | |
547 | ||
548 | default: | |
4be44fcd | 549 | return_ACPI_STATUS(AE_TYPE); |
1da177e4 LT |
550 | } |
551 | ||
552 | *result_desc = return_desc; | |
4be44fcd | 553 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
554 | } |
555 | ||
1da177e4 LT |
556 | /******************************************************************************* |
557 | * | |
558 | * FUNCTION: acpi_ex_convert_to_target_type | |
559 | * | |
560 | * PARAMETERS: destination_type - Current type of the destination | |
561 | * source_desc - Source object to be converted. | |
562 | * result_desc - Where the converted object is returned | |
563 | * walk_state - Current method state | |
564 | * | |
565 | * RETURN: Status | |
566 | * | |
567 | * DESCRIPTION: Implements "implicit conversion" rules for storing an object. | |
568 | * | |
569 | ******************************************************************************/ | |
570 | ||
571 | acpi_status | |
4be44fcd LB |
572 | acpi_ex_convert_to_target_type(acpi_object_type destination_type, |
573 | union acpi_operand_object *source_desc, | |
574 | union acpi_operand_object **result_desc, | |
575 | struct acpi_walk_state *walk_state) | |
1da177e4 | 576 | { |
4be44fcd | 577 | acpi_status status = AE_OK; |
1da177e4 | 578 | |
b229cf92 | 579 | ACPI_FUNCTION_TRACE(ex_convert_to_target_type); |
1da177e4 LT |
580 | |
581 | /* Default behavior */ | |
582 | ||
583 | *result_desc = source_desc; | |
584 | ||
585 | /* | |
586 | * If required by the target, | |
587 | * perform implicit conversion on the source before we store it. | |
588 | */ | |
4be44fcd | 589 | switch (GET_CURRENT_ARG_TYPE(walk_state->op_info->runtime_args)) { |
1da177e4 LT |
590 | case ARGI_SIMPLE_TARGET: |
591 | case ARGI_FIXED_TARGET: | |
4be44fcd | 592 | case ARGI_INTEGER_REF: /* Handles Increment, Decrement cases */ |
1da177e4 LT |
593 | |
594 | switch (destination_type) { | |
595 | case ACPI_TYPE_LOCAL_REGION_FIELD: | |
596 | /* | |
597 | * Named field can always handle conversions | |
598 | */ | |
599 | break; | |
600 | ||
601 | default: | |
602 | /* No conversion allowed for these types */ | |
603 | ||
3371c19c | 604 | if (destination_type != source_desc->common.type) { |
4be44fcd LB |
605 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
606 | "Explicit operator, will store (%s) over existing type (%s)\n", | |
607 | acpi_ut_get_object_type_name | |
608 | (source_desc), | |
609 | acpi_ut_get_type_name | |
610 | (destination_type))); | |
1da177e4 LT |
611 | status = AE_TYPE; |
612 | } | |
613 | } | |
614 | break; | |
615 | ||
1da177e4 LT |
616 | case ARGI_TARGETREF: |
617 | ||
618 | switch (destination_type) { | |
619 | case ACPI_TYPE_INTEGER: | |
620 | case ACPI_TYPE_BUFFER_FIELD: | |
621 | case ACPI_TYPE_LOCAL_BANK_FIELD: | |
622 | case ACPI_TYPE_LOCAL_INDEX_FIELD: | |
623 | /* | |
2425a096 | 624 | * These types require an Integer operand. We can convert |
1da177e4 LT |
625 | * a Buffer or a String to an Integer if necessary. |
626 | */ | |
4be44fcd LB |
627 | status = |
628 | acpi_ex_convert_to_integer(source_desc, result_desc, | |
629 | 16); | |
1da177e4 LT |
630 | break; |
631 | ||
1da177e4 | 632 | case ACPI_TYPE_STRING: |
1da177e4 | 633 | /* |
2425a096 | 634 | * The operand must be a String. We can convert an |
1da177e4 LT |
635 | * Integer or Buffer if necessary |
636 | */ | |
4be44fcd LB |
637 | status = |
638 | acpi_ex_convert_to_string(source_desc, result_desc, | |
639 | ACPI_IMPLICIT_CONVERT_HEX); | |
1da177e4 LT |
640 | break; |
641 | ||
1da177e4 | 642 | case ACPI_TYPE_BUFFER: |
1da177e4 | 643 | /* |
2425a096 | 644 | * The operand must be a Buffer. We can convert an |
1da177e4 LT |
645 | * Integer or String if necessary |
646 | */ | |
4be44fcd LB |
647 | status = |
648 | acpi_ex_convert_to_buffer(source_desc, result_desc); | |
1da177e4 LT |
649 | break; |
650 | ||
1da177e4 | 651 | default: |
b8e4d893 | 652 | ACPI_ERROR((AE_INFO, |
f6a22b0b | 653 | "Bad destination type during conversion: 0x%X", |
b8e4d893 | 654 | destination_type)); |
1da177e4 LT |
655 | status = AE_AML_INTERNAL; |
656 | break; | |
657 | } | |
658 | break; | |
659 | ||
1da177e4 LT |
660 | case ARGI_REFERENCE: |
661 | /* | |
662 | * create_xxxx_field cases - we are storing the field object into the name | |
663 | */ | |
664 | break; | |
665 | ||
1da177e4 | 666 | default: |
b8e4d893 | 667 | ACPI_ERROR((AE_INFO, |
f6a22b0b | 668 | "Unknown Target type ID 0x%X AmlOpcode 0x%X DestType %s", |
b8e4d893 BM |
669 | GET_CURRENT_ARG_TYPE(walk_state->op_info-> |
670 | runtime_args), | |
671 | walk_state->opcode, | |
672 | acpi_ut_get_type_name(destination_type))); | |
4a90c7e8 | 673 | status = AE_AML_INTERNAL; |
1da177e4 LT |
674 | } |
675 | ||
676 | /* | |
677 | * Source-to-Target conversion semantics: | |
678 | * | |
679 | * If conversion to the target type cannot be performed, then simply | |
680 | * overwrite the target with the new object and type. | |
681 | */ | |
682 | if (status == AE_TYPE) { | |
683 | status = AE_OK; | |
684 | } | |
685 | ||
4be44fcd | 686 | return_ACPI_STATUS(status); |
1da177e4 | 687 | } |