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1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: nsconvert - Object conversions for objects returned by | |
4 | * predefined methods | |
5 | * | |
6 | *****************************************************************************/ | |
7 | ||
8 | /* | |
fbb7a2dc | 9 | * Copyright (C) 2000 - 2014, Intel Corp. |
76a6225b BM |
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: | |
1d1ea1b7 | 106 | |
76a6225b BM |
107 | return (AE_AML_OPERAND_TYPE); |
108 | } | |
109 | ||
110 | new_object = acpi_ut_create_integer_object(value); | |
111 | if (!new_object) { | |
112 | return (AE_NO_MEMORY); | |
113 | } | |
114 | ||
115 | *return_object = new_object; | |
116 | return (AE_OK); | |
117 | } | |
118 | ||
119 | /******************************************************************************* | |
120 | * | |
121 | * FUNCTION: acpi_ns_convert_to_string | |
122 | * | |
123 | * PARAMETERS: original_object - Object to be converted | |
124 | * return_object - Where the new converted object is returned | |
125 | * | |
126 | * RETURN: Status. AE_OK if conversion was successful. | |
127 | * | |
128 | * DESCRIPTION: Attempt to convert a Integer/Buffer object to a String. | |
129 | * | |
130 | ******************************************************************************/ | |
131 | ||
132 | acpi_status | |
133 | acpi_ns_convert_to_string(union acpi_operand_object *original_object, | |
134 | union acpi_operand_object **return_object) | |
135 | { | |
136 | union acpi_operand_object *new_object; | |
137 | acpi_size length; | |
138 | acpi_status status; | |
139 | ||
140 | switch (original_object->common.type) { | |
141 | case ACPI_TYPE_INTEGER: | |
142 | /* | |
143 | * Integer-to-String conversion. Commonly, convert | |
144 | * an integer of value 0 to a NULL string. The last element of | |
145 | * _BIF and _BIX packages occasionally need this fix. | |
146 | */ | |
147 | if (original_object->integer.value == 0) { | |
148 | ||
149 | /* Allocate a new NULL string object */ | |
150 | ||
151 | new_object = acpi_ut_create_string_object(0); | |
152 | if (!new_object) { | |
153 | return (AE_NO_MEMORY); | |
154 | } | |
155 | } else { | |
156 | status = | |
157 | acpi_ex_convert_to_string(original_object, | |
158 | &new_object, | |
159 | ACPI_IMPLICIT_CONVERT_HEX); | |
160 | if (ACPI_FAILURE(status)) { | |
161 | return (status); | |
162 | } | |
163 | } | |
164 | break; | |
165 | ||
166 | case ACPI_TYPE_BUFFER: | |
167 | /* | |
168 | * Buffer-to-String conversion. Use a to_string | |
169 | * conversion, no transform performed on the buffer data. The best | |
170 | * example of this is the _BIF method, where the string data from | |
171 | * the battery is often (incorrectly) returned as buffer object(s). | |
172 | */ | |
173 | length = 0; | |
174 | while ((length < original_object->buffer.length) && | |
175 | (original_object->buffer.pointer[length])) { | |
176 | length++; | |
177 | } | |
178 | ||
179 | /* Allocate a new string object */ | |
180 | ||
181 | new_object = acpi_ut_create_string_object(length); | |
182 | if (!new_object) { | |
183 | return (AE_NO_MEMORY); | |
184 | } | |
185 | ||
186 | /* | |
187 | * Copy the raw buffer data with no transform. String is already NULL | |
188 | * terminated at Length+1. | |
189 | */ | |
190 | ACPI_MEMCPY(new_object->string.pointer, | |
191 | original_object->buffer.pointer, length); | |
192 | break; | |
193 | ||
194 | default: | |
1d1ea1b7 | 195 | |
76a6225b BM |
196 | return (AE_AML_OPERAND_TYPE); |
197 | } | |
198 | ||
199 | *return_object = new_object; | |
200 | return (AE_OK); | |
201 | } | |
202 | ||
203 | /******************************************************************************* | |
204 | * | |
205 | * FUNCTION: acpi_ns_convert_to_buffer | |
206 | * | |
207 | * PARAMETERS: original_object - Object to be converted | |
208 | * return_object - Where the new converted object is returned | |
209 | * | |
210 | * RETURN: Status. AE_OK if conversion was successful. | |
211 | * | |
212 | * DESCRIPTION: Attempt to convert a Integer/String/Package object to a Buffer. | |
213 | * | |
214 | ******************************************************************************/ | |
215 | ||
216 | acpi_status | |
217 | acpi_ns_convert_to_buffer(union acpi_operand_object *original_object, | |
218 | union acpi_operand_object **return_object) | |
219 | { | |
220 | union acpi_operand_object *new_object; | |
221 | acpi_status status; | |
222 | union acpi_operand_object **elements; | |
223 | u32 *dword_buffer; | |
224 | u32 count; | |
225 | u32 i; | |
226 | ||
227 | switch (original_object->common.type) { | |
228 | case ACPI_TYPE_INTEGER: | |
229 | /* | |
230 | * Integer-to-Buffer conversion. | |
231 | * Convert the Integer to a packed-byte buffer. _MAT and other | |
232 | * objects need this sometimes, if a read has been performed on a | |
233 | * Field object that is less than or equal to the global integer | |
234 | * size (32 or 64 bits). | |
235 | */ | |
236 | status = | |
237 | acpi_ex_convert_to_buffer(original_object, &new_object); | |
238 | if (ACPI_FAILURE(status)) { | |
239 | return (status); | |
240 | } | |
241 | break; | |
242 | ||
243 | case ACPI_TYPE_STRING: | |
244 | ||
245 | /* String-to-Buffer conversion. Simple data copy */ | |
246 | ||
247 | new_object = | |
248 | acpi_ut_create_buffer_object(original_object->string. | |
249 | length); | |
250 | if (!new_object) { | |
251 | return (AE_NO_MEMORY); | |
252 | } | |
253 | ||
254 | ACPI_MEMCPY(new_object->buffer.pointer, | |
255 | original_object->string.pointer, | |
256 | original_object->string.length); | |
257 | break; | |
258 | ||
259 | case ACPI_TYPE_PACKAGE: | |
260 | /* | |
261 | * This case is often seen for predefined names that must return a | |
262 | * Buffer object with multiple DWORD integers within. For example, | |
263 | * _FDE and _GTM. The Package can be converted to a Buffer. | |
264 | */ | |
265 | ||
266 | /* All elements of the Package must be integers */ | |
267 | ||
268 | elements = original_object->package.elements; | |
269 | count = original_object->package.count; | |
270 | ||
271 | for (i = 0; i < count; i++) { | |
272 | if ((!*elements) || | |
273 | ((*elements)->common.type != ACPI_TYPE_INTEGER)) { | |
274 | return (AE_AML_OPERAND_TYPE); | |
275 | } | |
276 | elements++; | |
277 | } | |
278 | ||
279 | /* Create the new buffer object to replace the Package */ | |
280 | ||
281 | new_object = acpi_ut_create_buffer_object(ACPI_MUL_4(count)); | |
282 | if (!new_object) { | |
283 | return (AE_NO_MEMORY); | |
284 | } | |
285 | ||
286 | /* Copy the package elements (integers) to the buffer as DWORDs */ | |
287 | ||
288 | elements = original_object->package.elements; | |
289 | dword_buffer = ACPI_CAST_PTR(u32, new_object->buffer.pointer); | |
290 | ||
291 | for (i = 0; i < count; i++) { | |
292 | *dword_buffer = (u32)(*elements)->integer.value; | |
293 | dword_buffer++; | |
294 | elements++; | |
295 | } | |
296 | break; | |
297 | ||
298 | default: | |
1d1ea1b7 | 299 | |
76a6225b BM |
300 | return (AE_AML_OPERAND_TYPE); |
301 | } | |
302 | ||
303 | *return_object = new_object; | |
304 | return (AE_OK); | |
305 | } | |
96b44cc6 LZ |
306 | |
307 | /******************************************************************************* | |
308 | * | |
309 | * FUNCTION: acpi_ns_convert_to_unicode | |
310 | * | |
311 | * PARAMETERS: original_object - ASCII String Object to be converted | |
312 | * return_object - Where the new converted object is returned | |
313 | * | |
314 | * RETURN: Status. AE_OK if conversion was successful. | |
315 | * | |
316 | * DESCRIPTION: Attempt to convert a String object to a Unicode string Buffer. | |
317 | * | |
318 | ******************************************************************************/ | |
319 | ||
320 | acpi_status | |
321 | acpi_ns_convert_to_unicode(union acpi_operand_object *original_object, | |
322 | union acpi_operand_object **return_object) | |
323 | { | |
324 | union acpi_operand_object *new_object; | |
325 | char *ascii_string; | |
326 | u16 *unicode_buffer; | |
327 | u32 unicode_length; | |
328 | u32 i; | |
329 | ||
330 | if (!original_object) { | |
331 | return (AE_OK); | |
332 | } | |
333 | ||
334 | /* If a Buffer was returned, it must be at least two bytes long */ | |
335 | ||
336 | if (original_object->common.type == ACPI_TYPE_BUFFER) { | |
337 | if (original_object->buffer.length < 2) { | |
338 | return (AE_AML_OPERAND_VALUE); | |
339 | } | |
340 | ||
341 | *return_object = NULL; | |
342 | return (AE_OK); | |
343 | } | |
344 | ||
345 | /* | |
346 | * The original object is an ASCII string. Convert this string to | |
347 | * a unicode buffer. | |
348 | */ | |
349 | ascii_string = original_object->string.pointer; | |
350 | unicode_length = (original_object->string.length * 2) + 2; | |
351 | ||
352 | /* Create a new buffer object for the Unicode data */ | |
353 | ||
354 | new_object = acpi_ut_create_buffer_object(unicode_length); | |
355 | if (!new_object) { | |
356 | return (AE_NO_MEMORY); | |
357 | } | |
358 | ||
359 | unicode_buffer = ACPI_CAST_PTR(u16, new_object->buffer.pointer); | |
360 | ||
361 | /* Convert ASCII to Unicode */ | |
362 | ||
363 | for (i = 0; i < original_object->string.length; i++) { | |
364 | unicode_buffer[i] = (u16)ascii_string[i]; | |
365 | } | |
366 | ||
367 | *return_object = new_object; | |
368 | return (AE_OK); | |
369 | } | |
88fd0ac8 LZ |
370 | |
371 | /******************************************************************************* | |
372 | * | |
373 | * FUNCTION: acpi_ns_convert_to_resource | |
374 | * | |
375 | * PARAMETERS: original_object - Object to be converted | |
376 | * return_object - Where the new converted object is returned | |
377 | * | |
378 | * RETURN: Status. AE_OK if conversion was successful | |
379 | * | |
380 | * DESCRIPTION: Attempt to convert a Integer object to a resource_template | |
381 | * Buffer. | |
382 | * | |
383 | ******************************************************************************/ | |
384 | ||
385 | acpi_status | |
386 | acpi_ns_convert_to_resource(union acpi_operand_object *original_object, | |
387 | union acpi_operand_object **return_object) | |
388 | { | |
389 | union acpi_operand_object *new_object; | |
390 | u8 *buffer; | |
391 | ||
392 | /* | |
393 | * We can fix the following cases for an expected resource template: | |
394 | * 1. No return value (interpreter slack mode is disabled) | |
395 | * 2. A "Return (Zero)" statement | |
396 | * 3. A "Return empty buffer" statement | |
397 | * | |
398 | * We will return a buffer containing a single end_tag | |
399 | * resource descriptor. | |
400 | */ | |
401 | if (original_object) { | |
402 | switch (original_object->common.type) { | |
403 | case ACPI_TYPE_INTEGER: | |
404 | ||
405 | /* We can only repair an Integer==0 */ | |
406 | ||
407 | if (original_object->integer.value) { | |
408 | return (AE_AML_OPERAND_TYPE); | |
409 | } | |
410 | break; | |
411 | ||
412 | case ACPI_TYPE_BUFFER: | |
413 | ||
414 | if (original_object->buffer.length) { | |
415 | ||
416 | /* Additional checks can be added in the future */ | |
417 | ||
418 | *return_object = NULL; | |
419 | return (AE_OK); | |
420 | } | |
421 | break; | |
422 | ||
423 | case ACPI_TYPE_STRING: | |
424 | default: | |
425 | ||
426 | return (AE_AML_OPERAND_TYPE); | |
427 | } | |
428 | } | |
429 | ||
430 | /* Create the new buffer object for the resource descriptor */ | |
431 | ||
432 | new_object = acpi_ut_create_buffer_object(2); | |
433 | if (!new_object) { | |
434 | return (AE_NO_MEMORY); | |
435 | } | |
436 | ||
437 | buffer = ACPI_CAST_PTR(u8, new_object->buffer.pointer); | |
438 | ||
439 | /* Initialize the Buffer with a single end_tag descriptor */ | |
440 | ||
441 | buffer[0] = (ACPI_RESOURCE_NAME_END_TAG | ASL_RDESC_END_TAG_SIZE); | |
442 | buffer[1] = 0x00; | |
443 | ||
444 | *return_object = new_object; | |
445 | return (AE_OK); | |
446 | } |