Go to most recent revision | Details | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
6595 | serge | 1 | /****************************************************************************** |
2 | * |
||
3 | * Module Name: exmisc - ACPI AML (p-code) execution - specific opcodes |
||
4 | * |
||
5 | *****************************************************************************/ |
||
6 | |||
7 | /* |
||
8 | * Copyright (C) 2000 - 2015, Intel Corp. |
||
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 |
||
45 | #include "accommon.h" |
||
46 | #include "acinterp.h" |
||
47 | #include "amlcode.h" |
||
48 | #include "amlresrc.h" |
||
49 | |||
50 | #define _COMPONENT ACPI_EXECUTER |
||
51 | ACPI_MODULE_NAME("exmisc") |
||
52 | |||
53 | /******************************************************************************* |
||
54 | * |
||
55 | * FUNCTION: acpi_ex_get_object_reference |
||
56 | * |
||
57 | * PARAMETERS: obj_desc - Create a reference to this object |
||
58 | * return_desc - Where to store the reference |
||
59 | * walk_state - Current state |
||
60 | * |
||
61 | * RETURN: Status |
||
62 | * |
||
63 | * DESCRIPTION: Obtain and return a "reference" to the target object |
||
64 | * Common code for the ref_of_op and the cond_ref_of_op. |
||
65 | * |
||
66 | ******************************************************************************/ |
||
67 | acpi_status |
||
68 | acpi_ex_get_object_reference(union acpi_operand_object *obj_desc, |
||
69 | union acpi_operand_object **return_desc, |
||
70 | struct acpi_walk_state *walk_state) |
||
71 | { |
||
72 | union acpi_operand_object *reference_obj; |
||
73 | union acpi_operand_object *referenced_obj; |
||
74 | |||
75 | ACPI_FUNCTION_TRACE_PTR(ex_get_object_reference, obj_desc); |
||
76 | |||
77 | *return_desc = NULL; |
||
78 | |||
79 | switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) { |
||
80 | case ACPI_DESC_TYPE_OPERAND: |
||
81 | |||
82 | if (obj_desc->common.type != ACPI_TYPE_LOCAL_REFERENCE) { |
||
83 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
||
84 | } |
||
85 | |||
86 | /* |
||
87 | * Must be a reference to a Local or Arg |
||
88 | */ |
||
89 | switch (obj_desc->reference.class) { |
||
90 | case ACPI_REFCLASS_LOCAL: |
||
91 | case ACPI_REFCLASS_ARG: |
||
92 | case ACPI_REFCLASS_DEBUG: |
||
93 | |||
94 | /* The referenced object is the pseudo-node for the local/arg */ |
||
95 | |||
96 | referenced_obj = obj_desc->reference.object; |
||
97 | break; |
||
98 | |||
99 | default: |
||
100 | |||
101 | ACPI_ERROR((AE_INFO, "Unknown Reference Class 0x%2.2X", |
||
102 | obj_desc->reference.class)); |
||
103 | return_ACPI_STATUS(AE_AML_INTERNAL); |
||
104 | } |
||
105 | break; |
||
106 | |||
107 | case ACPI_DESC_TYPE_NAMED: |
||
108 | /* |
||
109 | * A named reference that has already been resolved to a Node |
||
110 | */ |
||
111 | referenced_obj = obj_desc; |
||
112 | break; |
||
113 | |||
114 | default: |
||
115 | |||
116 | ACPI_ERROR((AE_INFO, "Invalid descriptor type 0x%X", |
||
117 | ACPI_GET_DESCRIPTOR_TYPE(obj_desc))); |
||
118 | return_ACPI_STATUS(AE_TYPE); |
||
119 | } |
||
120 | |||
121 | /* Create a new reference object */ |
||
122 | |||
123 | reference_obj = |
||
124 | acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE); |
||
125 | if (!reference_obj) { |
||
126 | return_ACPI_STATUS(AE_NO_MEMORY); |
||
127 | } |
||
128 | |||
129 | reference_obj->reference.class = ACPI_REFCLASS_REFOF; |
||
130 | reference_obj->reference.object = referenced_obj; |
||
131 | *return_desc = reference_obj; |
||
132 | |||
133 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
||
134 | "Object %p Type [%s], returning Reference %p\n", |
||
135 | obj_desc, acpi_ut_get_object_type_name(obj_desc), |
||
136 | *return_desc)); |
||
137 | |||
138 | return_ACPI_STATUS(AE_OK); |
||
139 | } |
||
140 | |||
141 | /******************************************************************************* |
||
142 | * |
||
143 | * FUNCTION: acpi_ex_concat_template |
||
144 | * |
||
145 | * PARAMETERS: operand0 - First source object |
||
146 | * operand1 - Second source object |
||
147 | * actual_return_desc - Where to place the return object |
||
148 | * walk_state - Current walk state |
||
149 | * |
||
150 | * RETURN: Status |
||
151 | * |
||
152 | * DESCRIPTION: Concatenate two resource templates |
||
153 | * |
||
154 | ******************************************************************************/ |
||
155 | |||
156 | acpi_status |
||
157 | acpi_ex_concat_template(union acpi_operand_object *operand0, |
||
158 | union acpi_operand_object *operand1, |
||
159 | union acpi_operand_object **actual_return_desc, |
||
160 | struct acpi_walk_state *walk_state) |
||
161 | { |
||
162 | acpi_status status; |
||
163 | union acpi_operand_object *return_desc; |
||
164 | u8 *new_buf; |
||
165 | u8 *end_tag; |
||
166 | acpi_size length0; |
||
167 | acpi_size length1; |
||
168 | acpi_size new_length; |
||
169 | |||
170 | ACPI_FUNCTION_TRACE(ex_concat_template); |
||
171 | |||
172 | /* |
||
173 | * Find the end_tag descriptor in each resource template. |
||
174 | * Note1: returned pointers point TO the end_tag, not past it. |
||
175 | * Note2: zero-length buffers are allowed; treated like one end_tag |
||
176 | */ |
||
177 | |||
178 | /* Get the length of the first resource template */ |
||
179 | |||
180 | status = acpi_ut_get_resource_end_tag(operand0, &end_tag); |
||
181 | if (ACPI_FAILURE(status)) { |
||
182 | return_ACPI_STATUS(status); |
||
183 | } |
||
184 | |||
185 | length0 = ACPI_PTR_DIFF(end_tag, operand0->buffer.pointer); |
||
186 | |||
187 | /* Get the length of the second resource template */ |
||
188 | |||
189 | status = acpi_ut_get_resource_end_tag(operand1, &end_tag); |
||
190 | if (ACPI_FAILURE(status)) { |
||
191 | return_ACPI_STATUS(status); |
||
192 | } |
||
193 | |||
194 | length1 = ACPI_PTR_DIFF(end_tag, operand1->buffer.pointer); |
||
195 | |||
196 | /* Combine both lengths, minimum size will be 2 for end_tag */ |
||
197 | |||
198 | new_length = length0 + length1 + sizeof(struct aml_resource_end_tag); |
||
199 | |||
200 | /* Create a new buffer object for the result (with one end_tag) */ |
||
201 | |||
202 | return_desc = acpi_ut_create_buffer_object(new_length); |
||
203 | if (!return_desc) { |
||
204 | return_ACPI_STATUS(AE_NO_MEMORY); |
||
205 | } |
||
206 | |||
207 | /* |
||
208 | * Copy the templates to the new buffer, 0 first, then 1 follows. One |
||
209 | * end_tag descriptor is copied from Operand1. |
||
210 | */ |
||
211 | new_buf = return_desc->buffer.pointer; |
||
212 | memcpy(new_buf, operand0->buffer.pointer, length0); |
||
213 | memcpy(new_buf + length0, operand1->buffer.pointer, length1); |
||
214 | |||
215 | /* Insert end_tag and set the checksum to zero, means "ignore checksum" */ |
||
216 | |||
217 | new_buf[new_length - 1] = 0; |
||
218 | new_buf[new_length - 2] = ACPI_RESOURCE_NAME_END_TAG | 1; |
||
219 | |||
220 | /* Return the completed resource template */ |
||
221 | |||
222 | *actual_return_desc = return_desc; |
||
223 | return_ACPI_STATUS(AE_OK); |
||
224 | } |
||
225 | |||
226 | /******************************************************************************* |
||
227 | * |
||
228 | * FUNCTION: acpi_ex_do_concatenate |
||
229 | * |
||
230 | * PARAMETERS: operand0 - First source object |
||
231 | * operand1 - Second source object |
||
232 | * actual_return_desc - Where to place the return object |
||
233 | * walk_state - Current walk state |
||
234 | * |
||
235 | * RETURN: Status |
||
236 | * |
||
237 | * DESCRIPTION: Concatenate two objects OF THE SAME TYPE. |
||
238 | * |
||
239 | ******************************************************************************/ |
||
240 | |||
241 | acpi_status |
||
242 | acpi_ex_do_concatenate(union acpi_operand_object *operand0, |
||
243 | union acpi_operand_object *operand1, |
||
244 | union acpi_operand_object **actual_return_desc, |
||
245 | struct acpi_walk_state *walk_state) |
||
246 | { |
||
247 | union acpi_operand_object *local_operand1 = operand1; |
||
248 | union acpi_operand_object *return_desc; |
||
249 | char *new_buf; |
||
250 | acpi_status status; |
||
251 | |||
252 | ACPI_FUNCTION_TRACE(ex_do_concatenate); |
||
253 | |||
254 | /* |
||
255 | * Convert the second operand if necessary. The first operand |
||
256 | * determines the type of the second operand, (See the Data Types |
||
257 | * section of the ACPI specification.) Both object types are |
||
258 | * guaranteed to be either Integer/String/Buffer by the operand |
||
259 | * resolution mechanism. |
||
260 | */ |
||
261 | switch (operand0->common.type) { |
||
262 | case ACPI_TYPE_INTEGER: |
||
263 | |||
264 | status = |
||
265 | acpi_ex_convert_to_integer(operand1, &local_operand1, 16); |
||
266 | break; |
||
267 | |||
268 | case ACPI_TYPE_STRING: |
||
269 | |||
270 | status = acpi_ex_convert_to_string(operand1, &local_operand1, |
||
271 | ACPI_IMPLICIT_CONVERT_HEX); |
||
272 | break; |
||
273 | |||
274 | case ACPI_TYPE_BUFFER: |
||
275 | |||
276 | status = acpi_ex_convert_to_buffer(operand1, &local_operand1); |
||
277 | break; |
||
278 | |||
279 | default: |
||
280 | |||
281 | ACPI_ERROR((AE_INFO, "Invalid object type: 0x%X", |
||
282 | operand0->common.type)); |
||
283 | status = AE_AML_INTERNAL; |
||
284 | } |
||
285 | |||
286 | if (ACPI_FAILURE(status)) { |
||
287 | goto cleanup; |
||
288 | } |
||
289 | |||
290 | /* |
||
291 | * Both operands are now known to be the same object type |
||
292 | * (Both are Integer, String, or Buffer), and we can now perform the |
||
293 | * concatenation. |
||
294 | */ |
||
295 | |||
296 | /* |
||
297 | * There are three cases to handle: |
||
298 | * |
||
299 | * 1) Two Integers concatenated to produce a new Buffer |
||
300 | * 2) Two Strings concatenated to produce a new String |
||
301 | * 3) Two Buffers concatenated to produce a new Buffer |
||
302 | */ |
||
303 | switch (operand0->common.type) { |
||
304 | case ACPI_TYPE_INTEGER: |
||
305 | |||
306 | /* Result of two Integers is a Buffer */ |
||
307 | /* Need enough buffer space for two integers */ |
||
308 | |||
309 | return_desc = acpi_ut_create_buffer_object((acpi_size) |
||
310 | ACPI_MUL_2 |
||
311 | (acpi_gbl_integer_byte_width)); |
||
312 | if (!return_desc) { |
||
313 | status = AE_NO_MEMORY; |
||
314 | goto cleanup; |
||
315 | } |
||
316 | |||
317 | new_buf = (char *)return_desc->buffer.pointer; |
||
318 | |||
319 | /* Copy the first integer, LSB first */ |
||
320 | |||
321 | memcpy(new_buf, &operand0->integer.value, |
||
322 | acpi_gbl_integer_byte_width); |
||
323 | |||
324 | /* Copy the second integer (LSB first) after the first */ |
||
325 | |||
326 | memcpy(new_buf + acpi_gbl_integer_byte_width, |
||
327 | &local_operand1->integer.value, |
||
328 | acpi_gbl_integer_byte_width); |
||
329 | break; |
||
330 | |||
331 | case ACPI_TYPE_STRING: |
||
332 | |||
333 | /* Result of two Strings is a String */ |
||
334 | |||
335 | return_desc = acpi_ut_create_string_object(((acpi_size) |
||
336 | operand0->string. |
||
337 | length + |
||
338 | local_operand1-> |
||
339 | string.length)); |
||
340 | if (!return_desc) { |
||
341 | status = AE_NO_MEMORY; |
||
342 | goto cleanup; |
||
343 | } |
||
344 | |||
345 | new_buf = return_desc->string.pointer; |
||
346 | |||
347 | /* Concatenate the strings */ |
||
348 | |||
349 | strcpy(new_buf, operand0->string.pointer); |
||
350 | strcpy(new_buf + operand0->string.length, |
||
351 | local_operand1->string.pointer); |
||
352 | break; |
||
353 | |||
354 | case ACPI_TYPE_BUFFER: |
||
355 | |||
356 | /* Result of two Buffers is a Buffer */ |
||
357 | |||
358 | return_desc = acpi_ut_create_buffer_object(((acpi_size) |
||
359 | operand0->buffer. |
||
360 | length + |
||
361 | local_operand1-> |
||
362 | buffer.length)); |
||
363 | if (!return_desc) { |
||
364 | status = AE_NO_MEMORY; |
||
365 | goto cleanup; |
||
366 | } |
||
367 | |||
368 | new_buf = (char *)return_desc->buffer.pointer; |
||
369 | |||
370 | /* Concatenate the buffers */ |
||
371 | |||
372 | memcpy(new_buf, operand0->buffer.pointer, |
||
373 | operand0->buffer.length); |
||
374 | memcpy(new_buf + operand0->buffer.length, |
||
375 | local_operand1->buffer.pointer, |
||
376 | local_operand1->buffer.length); |
||
377 | break; |
||
378 | |||
379 | default: |
||
380 | |||
381 | /* Invalid object type, should not happen here */ |
||
382 | |||
383 | ACPI_ERROR((AE_INFO, "Invalid object type: 0x%X", |
||
384 | operand0->common.type)); |
||
385 | status = AE_AML_INTERNAL; |
||
386 | goto cleanup; |
||
387 | } |
||
388 | |||
389 | *actual_return_desc = return_desc; |
||
390 | |||
391 | cleanup: |
||
392 | if (local_operand1 != operand1) { |
||
393 | acpi_ut_remove_reference(local_operand1); |
||
394 | } |
||
395 | return_ACPI_STATUS(status); |
||
396 | } |
||
397 | |||
398 | /******************************************************************************* |
||
399 | * |
||
400 | * FUNCTION: acpi_ex_do_math_op |
||
401 | * |
||
402 | * PARAMETERS: opcode - AML opcode |
||
403 | * integer0 - Integer operand #0 |
||
404 | * integer1 - Integer operand #1 |
||
405 | * |
||
406 | * RETURN: Integer result of the operation |
||
407 | * |
||
408 | * DESCRIPTION: Execute a math AML opcode. The purpose of having all of the |
||
409 | * math functions here is to prevent a lot of pointer dereferencing |
||
410 | * to obtain the operands. |
||
411 | * |
||
412 | ******************************************************************************/ |
||
413 | |||
414 | u64 acpi_ex_do_math_op(u16 opcode, u64 integer0, u64 integer1) |
||
415 | { |
||
416 | |||
417 | ACPI_FUNCTION_ENTRY(); |
||
418 | |||
419 | switch (opcode) { |
||
420 | case AML_ADD_OP: /* Add (Integer0, Integer1, Result) */ |
||
421 | |||
422 | return (integer0 + integer1); |
||
423 | |||
424 | case AML_BIT_AND_OP: /* And (Integer0, Integer1, Result) */ |
||
425 | |||
426 | return (integer0 & integer1); |
||
427 | |||
428 | case AML_BIT_NAND_OP: /* NAnd (Integer0, Integer1, Result) */ |
||
429 | |||
430 | return (~(integer0 & integer1)); |
||
431 | |||
432 | case AML_BIT_OR_OP: /* Or (Integer0, Integer1, Result) */ |
||
433 | |||
434 | return (integer0 | integer1); |
||
435 | |||
436 | case AML_BIT_NOR_OP: /* NOr (Integer0, Integer1, Result) */ |
||
437 | |||
438 | return (~(integer0 | integer1)); |
||
439 | |||
440 | case AML_BIT_XOR_OP: /* XOr (Integer0, Integer1, Result) */ |
||
441 | |||
442 | return (integer0 ^ integer1); |
||
443 | |||
444 | case AML_MULTIPLY_OP: /* Multiply (Integer0, Integer1, Result) */ |
||
445 | |||
446 | return (integer0 * integer1); |
||
447 | |||
448 | case AML_SHIFT_LEFT_OP: /* shift_left (Operand, shift_count, Result) */ |
||
449 | |||
450 | /* |
||
451 | * We need to check if the shiftcount is larger than the integer bit |
||
452 | * width since the behavior of this is not well-defined in the C language. |
||
453 | */ |
||
454 | if (integer1 >= acpi_gbl_integer_bit_width) { |
||
455 | return (0); |
||
456 | } |
||
457 | return (integer0 << integer1); |
||
458 | |||
459 | case AML_SHIFT_RIGHT_OP: /* shift_right (Operand, shift_count, Result) */ |
||
460 | |||
461 | /* |
||
462 | * We need to check if the shiftcount is larger than the integer bit |
||
463 | * width since the behavior of this is not well-defined in the C language. |
||
464 | */ |
||
465 | if (integer1 >= acpi_gbl_integer_bit_width) { |
||
466 | return (0); |
||
467 | } |
||
468 | return (integer0 >> integer1); |
||
469 | |||
470 | case AML_SUBTRACT_OP: /* Subtract (Integer0, Integer1, Result) */ |
||
471 | |||
472 | return (integer0 - integer1); |
||
473 | |||
474 | default: |
||
475 | |||
476 | return (0); |
||
477 | } |
||
478 | } |
||
479 | |||
480 | /******************************************************************************* |
||
481 | * |
||
482 | * FUNCTION: acpi_ex_do_logical_numeric_op |
||
483 | * |
||
484 | * PARAMETERS: opcode - AML opcode |
||
485 | * integer0 - Integer operand #0 |
||
486 | * integer1 - Integer operand #1 |
||
487 | * logical_result - TRUE/FALSE result of the operation |
||
488 | * |
||
489 | * RETURN: Status |
||
490 | * |
||
491 | * DESCRIPTION: Execute a logical "Numeric" AML opcode. For these Numeric |
||
492 | * operators (LAnd and LOr), both operands must be integers. |
||
493 | * |
||
494 | * Note: cleanest machine code seems to be produced by the code |
||
495 | * below, rather than using statements of the form: |
||
496 | * Result = (Integer0 && Integer1); |
||
497 | * |
||
498 | ******************************************************************************/ |
||
499 | |||
500 | acpi_status |
||
501 | acpi_ex_do_logical_numeric_op(u16 opcode, |
||
502 | u64 integer0, u64 integer1, u8 *logical_result) |
||
503 | { |
||
504 | acpi_status status = AE_OK; |
||
505 | u8 local_result = FALSE; |
||
506 | |||
507 | ACPI_FUNCTION_TRACE(ex_do_logical_numeric_op); |
||
508 | |||
509 | switch (opcode) { |
||
510 | case AML_LAND_OP: /* LAnd (Integer0, Integer1) */ |
||
511 | |||
512 | if (integer0 && integer1) { |
||
513 | local_result = TRUE; |
||
514 | } |
||
515 | break; |
||
516 | |||
517 | case AML_LOR_OP: /* LOr (Integer0, Integer1) */ |
||
518 | |||
519 | if (integer0 || integer1) { |
||
520 | local_result = TRUE; |
||
521 | } |
||
522 | break; |
||
523 | |||
524 | default: |
||
525 | |||
526 | status = AE_AML_INTERNAL; |
||
527 | break; |
||
528 | } |
||
529 | |||
530 | /* Return the logical result and status */ |
||
531 | |||
532 | *logical_result = local_result; |
||
533 | return_ACPI_STATUS(status); |
||
534 | } |
||
535 | |||
536 | /******************************************************************************* |
||
537 | * |
||
538 | * FUNCTION: acpi_ex_do_logical_op |
||
539 | * |
||
540 | * PARAMETERS: opcode - AML opcode |
||
541 | * operand0 - operand #0 |
||
542 | * operand1 - operand #1 |
||
543 | * logical_result - TRUE/FALSE result of the operation |
||
544 | * |
||
545 | * RETURN: Status |
||
546 | * |
||
547 | * DESCRIPTION: Execute a logical AML opcode. The purpose of having all of the |
||
548 | * functions here is to prevent a lot of pointer dereferencing |
||
549 | * to obtain the operands and to simplify the generation of the |
||
550 | * logical value. For the Numeric operators (LAnd and LOr), both |
||
551 | * operands must be integers. For the other logical operators, |
||
552 | * operands can be any combination of Integer/String/Buffer. The |
||
553 | * first operand determines the type to which the second operand |
||
554 | * will be converted. |
||
555 | * |
||
556 | * Note: cleanest machine code seems to be produced by the code |
||
557 | * below, rather than using statements of the form: |
||
558 | * Result = (Operand0 == Operand1); |
||
559 | * |
||
560 | ******************************************************************************/ |
||
561 | |||
562 | acpi_status |
||
563 | acpi_ex_do_logical_op(u16 opcode, |
||
564 | union acpi_operand_object *operand0, |
||
565 | union acpi_operand_object *operand1, u8 * logical_result) |
||
566 | { |
||
567 | union acpi_operand_object *local_operand1 = operand1; |
||
568 | u64 integer0; |
||
569 | u64 integer1; |
||
570 | u32 length0; |
||
571 | u32 length1; |
||
572 | acpi_status status = AE_OK; |
||
573 | u8 local_result = FALSE; |
||
574 | int compare; |
||
575 | |||
576 | ACPI_FUNCTION_TRACE(ex_do_logical_op); |
||
577 | |||
578 | /* |
||
579 | * Convert the second operand if necessary. The first operand |
||
580 | * determines the type of the second operand, (See the Data Types |
||
581 | * section of the ACPI 3.0+ specification.) Both object types are |
||
582 | * guaranteed to be either Integer/String/Buffer by the operand |
||
583 | * resolution mechanism. |
||
584 | */ |
||
585 | switch (operand0->common.type) { |
||
586 | case ACPI_TYPE_INTEGER: |
||
587 | |||
588 | status = |
||
589 | acpi_ex_convert_to_integer(operand1, &local_operand1, 16); |
||
590 | break; |
||
591 | |||
592 | case ACPI_TYPE_STRING: |
||
593 | |||
594 | status = acpi_ex_convert_to_string(operand1, &local_operand1, |
||
595 | ACPI_IMPLICIT_CONVERT_HEX); |
||
596 | break; |
||
597 | |||
598 | case ACPI_TYPE_BUFFER: |
||
599 | |||
600 | status = acpi_ex_convert_to_buffer(operand1, &local_operand1); |
||
601 | break; |
||
602 | |||
603 | default: |
||
604 | |||
605 | status = AE_AML_INTERNAL; |
||
606 | break; |
||
607 | } |
||
608 | |||
609 | if (ACPI_FAILURE(status)) { |
||
610 | goto cleanup; |
||
611 | } |
||
612 | |||
613 | /* |
||
614 | * Two cases: 1) Both Integers, 2) Both Strings or Buffers |
||
615 | */ |
||
616 | if (operand0->common.type == ACPI_TYPE_INTEGER) { |
||
617 | /* |
||
618 | * 1) Both operands are of type integer |
||
619 | * Note: local_operand1 may have changed above |
||
620 | */ |
||
621 | integer0 = operand0->integer.value; |
||
622 | integer1 = local_operand1->integer.value; |
||
623 | |||
624 | switch (opcode) { |
||
625 | case AML_LEQUAL_OP: /* LEqual (Operand0, Operand1) */ |
||
626 | |||
627 | if (integer0 == integer1) { |
||
628 | local_result = TRUE; |
||
629 | } |
||
630 | break; |
||
631 | |||
632 | case AML_LGREATER_OP: /* LGreater (Operand0, Operand1) */ |
||
633 | |||
634 | if (integer0 > integer1) { |
||
635 | local_result = TRUE; |
||
636 | } |
||
637 | break; |
||
638 | |||
639 | case AML_LLESS_OP: /* LLess (Operand0, Operand1) */ |
||
640 | |||
641 | if (integer0 < integer1) { |
||
642 | local_result = TRUE; |
||
643 | } |
||
644 | break; |
||
645 | |||
646 | default: |
||
647 | |||
648 | status = AE_AML_INTERNAL; |
||
649 | break; |
||
650 | } |
||
651 | } else { |
||
652 | /* |
||
653 | * 2) Both operands are Strings or both are Buffers |
||
654 | * Note: Code below takes advantage of common Buffer/String |
||
655 | * object fields. local_operand1 may have changed above. Use |
||
656 | * memcmp to handle nulls in buffers. |
||
657 | */ |
||
658 | length0 = operand0->buffer.length; |
||
659 | length1 = local_operand1->buffer.length; |
||
660 | |||
661 | /* Lexicographic compare: compare the data bytes */ |
||
662 | |||
663 | compare = memcmp(operand0->buffer.pointer, |
||
664 | local_operand1->buffer.pointer, |
||
665 | (length0 > length1) ? length1 : length0); |
||
666 | |||
667 | switch (opcode) { |
||
668 | case AML_LEQUAL_OP: /* LEqual (Operand0, Operand1) */ |
||
669 | |||
670 | /* Length and all bytes must be equal */ |
||
671 | |||
672 | if ((length0 == length1) && (compare == 0)) { |
||
673 | |||
674 | /* Length and all bytes match ==> TRUE */ |
||
675 | |||
676 | local_result = TRUE; |
||
677 | } |
||
678 | break; |
||
679 | |||
680 | case AML_LGREATER_OP: /* LGreater (Operand0, Operand1) */ |
||
681 | |||
682 | if (compare > 0) { |
||
683 | local_result = TRUE; |
||
684 | goto cleanup; /* TRUE */ |
||
685 | } |
||
686 | if (compare < 0) { |
||
687 | goto cleanup; /* FALSE */ |
||
688 | } |
||
689 | |||
690 | /* Bytes match (to shortest length), compare lengths */ |
||
691 | |||
692 | if (length0 > length1) { |
||
693 | local_result = TRUE; |
||
694 | } |
||
695 | break; |
||
696 | |||
697 | case AML_LLESS_OP: /* LLess (Operand0, Operand1) */ |
||
698 | |||
699 | if (compare > 0) { |
||
700 | goto cleanup; /* FALSE */ |
||
701 | } |
||
702 | if (compare < 0) { |
||
703 | local_result = TRUE; |
||
704 | goto cleanup; /* TRUE */ |
||
705 | } |
||
706 | |||
707 | /* Bytes match (to shortest length), compare lengths */ |
||
708 | |||
709 | if (length0 < length1) { |
||
710 | local_result = TRUE; |
||
711 | } |
||
712 | break; |
||
713 | |||
714 | default: |
||
715 | |||
716 | status = AE_AML_INTERNAL; |
||
717 | break; |
||
718 | } |
||
719 | } |
||
720 | |||
721 | cleanup: |
||
722 | |||
723 | /* New object was created if implicit conversion performed - delete */ |
||
724 | |||
725 | if (local_operand1 != operand1) { |
||
726 | acpi_ut_remove_reference(local_operand1); |
||
727 | } |
||
728 | |||
729 | /* Return the logical result and status */ |
||
730 | |||
731 | *logical_result = local_result; |
||
732 | return_ACPI_STATUS(status); |
||
733 | }>>>>><> |