Revert "ARM: tegra: tegratab: dummy change"
[linux-2.6.git] / drivers / acpi / acpica / dsargs.c
1 /******************************************************************************
2  *
3  * Module Name: dsargs - Support for execution of dynamic arguments for static
4  *                       objects (regions, fields, buffer fields, etc.)
5  *
6  *****************************************************************************/
7
8 /*
9  * Copyright (C) 2000 - 2012, Intel Corp.
10  * All rights reserved.
11  *
12  * Redistribution and use in source and binary forms, with or without
13  * modification, are permitted provided that the following conditions
14  * are met:
15  * 1. Redistributions of source code must retain the above copyright
16  *    notice, this list of conditions, and the following disclaimer,
17  *    without modification.
18  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
19  *    substantially similar to the "NO WARRANTY" disclaimer below
20  *    ("Disclaimer") and any redistribution must be conditioned upon
21  *    including a substantially similar Disclaimer requirement for further
22  *    binary redistribution.
23  * 3. Neither the names of the above-listed copyright holders nor the names
24  *    of any contributors may be used to endorse or promote products derived
25  *    from this software without specific prior written permission.
26  *
27  * Alternatively, this software may be distributed under the terms of the
28  * GNU General Public License ("GPL") version 2 as published by the Free
29  * Software Foundation.
30  *
31  * NO WARRANTY
32  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
35  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
36  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
41  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42  * POSSIBILITY OF SUCH DAMAGES.
43  */
44
45 #include <acpi/acpi.h>
46 #include "accommon.h"
47 #include "acparser.h"
48 #include "amlcode.h"
49 #include "acdispat.h"
50 #include "acnamesp.h"
51
52 #define _COMPONENT          ACPI_DISPATCHER
53 ACPI_MODULE_NAME("dsargs")
54
55 /* Local prototypes */
56 static acpi_status
57 acpi_ds_execute_arguments(struct acpi_namespace_node *node,
58                           struct acpi_namespace_node *scope_node,
59                           u32 aml_length, u8 *aml_start);
60
61 /*******************************************************************************
62  *
63  * FUNCTION:    acpi_ds_execute_arguments
64  *
65  * PARAMETERS:  Node                - Object NS node
66  *              scope_node          - Parent NS node
67  *              aml_length          - Length of executable AML
68  *              aml_start           - Pointer to the AML
69  *
70  * RETURN:      Status.
71  *
72  * DESCRIPTION: Late (deferred) execution of region or field arguments
73  *
74  ******************************************************************************/
75
76 static acpi_status
77 acpi_ds_execute_arguments(struct acpi_namespace_node *node,
78                           struct acpi_namespace_node *scope_node,
79                           u32 aml_length, u8 *aml_start)
80 {
81         acpi_status status;
82         union acpi_parse_object *op;
83         struct acpi_walk_state *walk_state;
84
85         ACPI_FUNCTION_TRACE(ds_execute_arguments);
86
87         /* Allocate a new parser op to be the root of the parsed tree */
88
89         op = acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP);
90         if (!op) {
91                 return_ACPI_STATUS(AE_NO_MEMORY);
92         }
93
94         /* Save the Node for use in acpi_ps_parse_aml */
95
96         op->common.node = scope_node;
97
98         /* Create and initialize a new parser state */
99
100         walk_state = acpi_ds_create_walk_state(0, NULL, NULL, NULL);
101         if (!walk_state) {
102                 status = AE_NO_MEMORY;
103                 goto cleanup;
104         }
105
106         status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start,
107                                        aml_length, NULL, ACPI_IMODE_LOAD_PASS1);
108         if (ACPI_FAILURE(status)) {
109                 acpi_ds_delete_walk_state(walk_state);
110                 goto cleanup;
111         }
112
113         /* Mark this parse as a deferred opcode */
114
115         walk_state->parse_flags = ACPI_PARSE_DEFERRED_OP;
116         walk_state->deferred_node = node;
117
118         /* Pass1: Parse the entire declaration */
119
120         status = acpi_ps_parse_aml(walk_state);
121         if (ACPI_FAILURE(status)) {
122                 goto cleanup;
123         }
124
125         /* Get and init the Op created above */
126
127         op->common.node = node;
128         acpi_ps_delete_parse_tree(op);
129
130         /* Evaluate the deferred arguments */
131
132         op = acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP);
133         if (!op) {
134                 return_ACPI_STATUS(AE_NO_MEMORY);
135         }
136
137         op->common.node = scope_node;
138
139         /* Create and initialize a new parser state */
140
141         walk_state = acpi_ds_create_walk_state(0, NULL, NULL, NULL);
142         if (!walk_state) {
143                 status = AE_NO_MEMORY;
144                 goto cleanup;
145         }
146
147         /* Execute the opcode and arguments */
148
149         status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start,
150                                        aml_length, NULL, ACPI_IMODE_EXECUTE);
151         if (ACPI_FAILURE(status)) {
152                 acpi_ds_delete_walk_state(walk_state);
153                 goto cleanup;
154         }
155
156         /* Mark this execution as a deferred opcode */
157
158         walk_state->deferred_node = node;
159         status = acpi_ps_parse_aml(walk_state);
160
161       cleanup:
162         acpi_ps_delete_parse_tree(op);
163         return_ACPI_STATUS(status);
164 }
165
166 /*******************************************************************************
167  *
168  * FUNCTION:    acpi_ds_get_buffer_field_arguments
169  *
170  * PARAMETERS:  obj_desc        - A valid buffer_field object
171  *
172  * RETURN:      Status.
173  *
174  * DESCRIPTION: Get buffer_field Buffer and Index. This implements the late
175  *              evaluation of these field attributes.
176  *
177  ******************************************************************************/
178
179 acpi_status
180 acpi_ds_get_buffer_field_arguments(union acpi_operand_object *obj_desc)
181 {
182         union acpi_operand_object *extra_desc;
183         struct acpi_namespace_node *node;
184         acpi_status status;
185
186         ACPI_FUNCTION_TRACE_PTR(ds_get_buffer_field_arguments, obj_desc);
187
188         if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
189                 return_ACPI_STATUS(AE_OK);
190         }
191
192         /* Get the AML pointer (method object) and buffer_field node */
193
194         extra_desc = acpi_ns_get_secondary_object(obj_desc);
195         node = obj_desc->buffer_field.node;
196
197         ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname(ACPI_TYPE_BUFFER_FIELD,
198                                                       node, NULL));
199
200         ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] BufferField Arg Init\n",
201                           acpi_ut_get_node_name(node)));
202
203         /* Execute the AML code for the term_arg arguments */
204
205         status = acpi_ds_execute_arguments(node, node->parent,
206                                            extra_desc->extra.aml_length,
207                                            extra_desc->extra.aml_start);
208         return_ACPI_STATUS(status);
209 }
210
211 /*******************************************************************************
212  *
213  * FUNCTION:    acpi_ds_get_bank_field_arguments
214  *
215  * PARAMETERS:  obj_desc        - A valid bank_field object
216  *
217  * RETURN:      Status.
218  *
219  * DESCRIPTION: Get bank_field bank_value. This implements the late
220  *              evaluation of these field attributes.
221  *
222  ******************************************************************************/
223
224 acpi_status
225 acpi_ds_get_bank_field_arguments(union acpi_operand_object *obj_desc)
226 {
227         union acpi_operand_object *extra_desc;
228         struct acpi_namespace_node *node;
229         acpi_status status;
230
231         ACPI_FUNCTION_TRACE_PTR(ds_get_bank_field_arguments, obj_desc);
232
233         if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
234                 return_ACPI_STATUS(AE_OK);
235         }
236
237         /* Get the AML pointer (method object) and bank_field node */
238
239         extra_desc = acpi_ns_get_secondary_object(obj_desc);
240         node = obj_desc->bank_field.node;
241
242         ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
243                         (ACPI_TYPE_LOCAL_BANK_FIELD, node, NULL));
244
245         ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] BankField Arg Init\n",
246                           acpi_ut_get_node_name(node)));
247
248         /* Execute the AML code for the term_arg arguments */
249
250         status = acpi_ds_execute_arguments(node, node->parent,
251                                            extra_desc->extra.aml_length,
252                                            extra_desc->extra.aml_start);
253         if (ACPI_FAILURE(status)) {
254                 return_ACPI_STATUS(status);
255         }
256
257         status = acpi_ut_add_address_range(obj_desc->region.space_id,
258                                            obj_desc->region.address,
259                                            obj_desc->region.length, node);
260         return_ACPI_STATUS(status);
261 }
262
263 /*******************************************************************************
264  *
265  * FUNCTION:    acpi_ds_get_buffer_arguments
266  *
267  * PARAMETERS:  obj_desc        - A valid Buffer object
268  *
269  * RETURN:      Status.
270  *
271  * DESCRIPTION: Get Buffer length and initializer byte list. This implements
272  *              the late evaluation of these attributes.
273  *
274  ******************************************************************************/
275
276 acpi_status acpi_ds_get_buffer_arguments(union acpi_operand_object *obj_desc)
277 {
278         struct acpi_namespace_node *node;
279         acpi_status status;
280
281         ACPI_FUNCTION_TRACE_PTR(ds_get_buffer_arguments, obj_desc);
282
283         if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
284                 return_ACPI_STATUS(AE_OK);
285         }
286
287         /* Get the Buffer node */
288
289         node = obj_desc->buffer.node;
290         if (!node) {
291                 ACPI_ERROR((AE_INFO,
292                             "No pointer back to namespace node in buffer object %p",
293                             obj_desc));
294                 return_ACPI_STATUS(AE_AML_INTERNAL);
295         }
296
297         ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Buffer Arg Init\n"));
298
299         /* Execute the AML code for the term_arg arguments */
300
301         status = acpi_ds_execute_arguments(node, node,
302                                            obj_desc->buffer.aml_length,
303                                            obj_desc->buffer.aml_start);
304         return_ACPI_STATUS(status);
305 }
306
307 /*******************************************************************************
308  *
309  * FUNCTION:    acpi_ds_get_package_arguments
310  *
311  * PARAMETERS:  obj_desc        - A valid Package object
312  *
313  * RETURN:      Status.
314  *
315  * DESCRIPTION: Get Package length and initializer byte list. This implements
316  *              the late evaluation of these attributes.
317  *
318  ******************************************************************************/
319
320 acpi_status acpi_ds_get_package_arguments(union acpi_operand_object *obj_desc)
321 {
322         struct acpi_namespace_node *node;
323         acpi_status status;
324
325         ACPI_FUNCTION_TRACE_PTR(ds_get_package_arguments, obj_desc);
326
327         if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
328                 return_ACPI_STATUS(AE_OK);
329         }
330
331         /* Get the Package node */
332
333         node = obj_desc->package.node;
334         if (!node) {
335                 ACPI_ERROR((AE_INFO,
336                             "No pointer back to namespace node in package %p",
337                             obj_desc));
338                 return_ACPI_STATUS(AE_AML_INTERNAL);
339         }
340
341         ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Package Arg Init\n"));
342
343         /* Execute the AML code for the term_arg arguments */
344
345         status = acpi_ds_execute_arguments(node, node,
346                                            obj_desc->package.aml_length,
347                                            obj_desc->package.aml_start);
348         return_ACPI_STATUS(status);
349 }
350
351 /*******************************************************************************
352  *
353  * FUNCTION:    acpi_ds_get_region_arguments
354  *
355  * PARAMETERS:  obj_desc        - A valid region object
356  *
357  * RETURN:      Status.
358  *
359  * DESCRIPTION: Get region address and length. This implements the late
360  *              evaluation of these region attributes.
361  *
362  ******************************************************************************/
363
364 acpi_status acpi_ds_get_region_arguments(union acpi_operand_object *obj_desc)
365 {
366         struct acpi_namespace_node *node;
367         acpi_status status;
368         union acpi_operand_object *extra_desc;
369
370         ACPI_FUNCTION_TRACE_PTR(ds_get_region_arguments, obj_desc);
371
372         if (obj_desc->region.flags & AOPOBJ_DATA_VALID) {
373                 return_ACPI_STATUS(AE_OK);
374         }
375
376         extra_desc = acpi_ns_get_secondary_object(obj_desc);
377         if (!extra_desc) {
378                 return_ACPI_STATUS(AE_NOT_EXIST);
379         }
380
381         /* Get the Region node */
382
383         node = obj_desc->region.node;
384
385         ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
386                         (ACPI_TYPE_REGION, node, NULL));
387
388         ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] OpRegion Arg Init at AML %p\n",
389                           acpi_ut_get_node_name(node),
390                           extra_desc->extra.aml_start));
391
392         /* Execute the argument AML */
393
394         status = acpi_ds_execute_arguments(node, extra_desc->extra.scope_node,
395                                            extra_desc->extra.aml_length,
396                                            extra_desc->extra.aml_start);
397         if (ACPI_FAILURE(status)) {
398                 return_ACPI_STATUS(status);
399         }
400
401         status = acpi_ut_add_address_range(obj_desc->region.space_id,
402                                            obj_desc->region.address,
403                                            obj_desc->region.length, node);
404         return_ACPI_STATUS(status);
405 }