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[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [acpi/] [parser/] [psxface.c] - Blame information for rev 62

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1 62 marcus.erl
/******************************************************************************
2
 *
3
 * Module Name: psxface - Parser external interfaces
4
 *
5
 *****************************************************************************/
6
 
7
/*
8
 * Copyright (C) 2000 - 2007, R. Byron Moore
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
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 *    ("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 <acpi/acpi.h>
45
#include <acpi/acparser.h>
46
#include <acpi/acdispat.h>
47
#include <acpi/acinterp.h>
48
 
49
#define _COMPONENT          ACPI_PARSER
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ACPI_MODULE_NAME("psxface")
51
 
52
/* Local Prototypes */
53
static void acpi_ps_start_trace(struct acpi_evaluate_info *info);
54
 
55
static void acpi_ps_stop_trace(struct acpi_evaluate_info *info);
56
 
57
static void
58
acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action);
59
 
60
/*******************************************************************************
61
 *
62
 * FUNCTION:    acpi_debug_trace
63
 *
64
 * PARAMETERS:  method_name     - Valid ACPI name string
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 *              debug_level     - Optional level mask. 0 to use default
66
 *              debug_layer     - Optional layer mask. 0 to use default
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 *              Flags           - bit 1: one shot(1) or persistent(0)
68
 *
69
 * RETURN:      Status
70
 *
71
 * DESCRIPTION: External interface to enable debug tracing during control
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 *              method execution
73
 *
74
 ******************************************************************************/
75
 
76
acpi_status
77
acpi_debug_trace(char *name, u32 debug_level, u32 debug_layer, u32 flags)
78
{
79
        acpi_status status;
80
 
81
        status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
82
        if (ACPI_FAILURE(status)) {
83
                return (status);
84
        }
85
 
86
        /* TBDs: Validate name, allow full path or just nameseg */
87
 
88
        acpi_gbl_trace_method_name = *ACPI_CAST_PTR(u32, name);
89
        acpi_gbl_trace_flags = flags;
90
 
91
        if (debug_level) {
92
                acpi_gbl_trace_dbg_level = debug_level;
93
        }
94
        if (debug_layer) {
95
                acpi_gbl_trace_dbg_layer = debug_layer;
96
        }
97
 
98
        (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
99
        return (AE_OK);
100
}
101
 
102
/*******************************************************************************
103
 *
104
 * FUNCTION:    acpi_ps_start_trace
105
 *
106
 * PARAMETERS:  Info        - Method info struct
107
 *
108
 * RETURN:      None
109
 *
110
 * DESCRIPTION: Start control method execution trace
111
 *
112
 ******************************************************************************/
113
 
114
static void acpi_ps_start_trace(struct acpi_evaluate_info *info)
115
{
116
        acpi_status status;
117
 
118
        ACPI_FUNCTION_ENTRY();
119
 
120
        status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
121
        if (ACPI_FAILURE(status)) {
122
                return;
123
        }
124
 
125
        if ((!acpi_gbl_trace_method_name) ||
126
            (acpi_gbl_trace_method_name != info->resolved_node->name.integer)) {
127
                goto exit;
128
        }
129
 
130
        acpi_gbl_original_dbg_level = acpi_dbg_level;
131
        acpi_gbl_original_dbg_layer = acpi_dbg_layer;
132
 
133
        acpi_dbg_level = 0x00FFFFFF;
134
        acpi_dbg_layer = ACPI_UINT32_MAX;
135
 
136
        if (acpi_gbl_trace_dbg_level) {
137
                acpi_dbg_level = acpi_gbl_trace_dbg_level;
138
        }
139
        if (acpi_gbl_trace_dbg_layer) {
140
                acpi_dbg_layer = acpi_gbl_trace_dbg_layer;
141
        }
142
 
143
      exit:
144
        (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
145
}
146
 
147
/*******************************************************************************
148
 *
149
 * FUNCTION:    acpi_ps_stop_trace
150
 *
151
 * PARAMETERS:  Info        - Method info struct
152
 *
153
 * RETURN:      None
154
 *
155
 * DESCRIPTION: Stop control method execution trace
156
 *
157
 ******************************************************************************/
158
 
159
static void acpi_ps_stop_trace(struct acpi_evaluate_info *info)
160
{
161
        acpi_status status;
162
 
163
        ACPI_FUNCTION_ENTRY();
164
 
165
        status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
166
        if (ACPI_FAILURE(status)) {
167
                return;
168
        }
169
 
170
        if ((!acpi_gbl_trace_method_name) ||
171
            (acpi_gbl_trace_method_name != info->resolved_node->name.integer)) {
172
                goto exit;
173
        }
174
 
175
        /* Disable further tracing if type is one-shot */
176
 
177
        if (acpi_gbl_trace_flags & 1) {
178
                acpi_gbl_trace_method_name = 0;
179
                acpi_gbl_trace_dbg_level = 0;
180
                acpi_gbl_trace_dbg_layer = 0;
181
        }
182
 
183
        acpi_dbg_level = acpi_gbl_original_dbg_level;
184
        acpi_dbg_layer = acpi_gbl_original_dbg_layer;
185
 
186
      exit:
187
        (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
188
}
189
 
190
/*******************************************************************************
191
 *
192
 * FUNCTION:    acpi_ps_execute_method
193
 *
194
 * PARAMETERS:  Info            - Method info block, contains:
195
 *                  Node            - Method Node to execute
196
 *                  obj_desc        - Method object
197
 *                  Parameters      - List of parameters to pass to the method,
198
 *                                    terminated by NULL. Params itself may be
199
 *                                    NULL if no parameters are being passed.
200
 *                  return_object   - Where to put method's return value (if
201
 *                                    any). If NULL, no value is returned.
202
 *                  parameter_type  - Type of Parameter list
203
 *                  return_object   - Where to put method's return value (if
204
 *                                    any). If NULL, no value is returned.
205
 *                  pass_number     - Parse or execute pass
206
 *
207
 * RETURN:      Status
208
 *
209
 * DESCRIPTION: Execute a control method
210
 *
211
 ******************************************************************************/
212
 
213
acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info)
214
{
215
        acpi_status status;
216
        union acpi_parse_object *op;
217
        struct acpi_walk_state *walk_state;
218
 
219
        ACPI_FUNCTION_TRACE(ps_execute_method);
220
 
221
        /* Validate the Info and method Node */
222
 
223
        if (!info || !info->resolved_node) {
224
                return_ACPI_STATUS(AE_NULL_ENTRY);
225
        }
226
 
227
        /* Init for new method, wait on concurrency semaphore */
228
 
229
        status =
230
            acpi_ds_begin_method_execution(info->resolved_node, info->obj_desc,
231
                                           NULL);
232
        if (ACPI_FAILURE(status)) {
233
                return_ACPI_STATUS(status);
234
        }
235
 
236
        /*
237
         * The caller "owns" the parameters, so give each one an extra reference
238
         */
239
        acpi_ps_update_parameter_list(info, REF_INCREMENT);
240
 
241
        /* Begin tracing if requested */
242
 
243
        acpi_ps_start_trace(info);
244
 
245
        /*
246
         * Execute the method. Performs parse simultaneously
247
         */
248
        ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
249
                          "**** Begin Method Parse/Execute [%4.4s] **** Node=%p Obj=%p\n",
250
                          info->resolved_node->name.ascii, info->resolved_node,
251
                          info->obj_desc));
252
 
253
        /* Create and init a Root Node */
254
 
255
        op = acpi_ps_create_scope_op();
256
        if (!op) {
257
                status = AE_NO_MEMORY;
258
                goto cleanup;
259
        }
260
 
261
        /* Create and initialize a new walk state */
262
 
263
        info->pass_number = ACPI_IMODE_EXECUTE;
264
        walk_state =
265
            acpi_ds_create_walk_state(info->obj_desc->method.owner_id, NULL,
266
                                      NULL, NULL);
267
        if (!walk_state) {
268
                status = AE_NO_MEMORY;
269
                goto cleanup;
270
        }
271
 
272
        status = acpi_ds_init_aml_walk(walk_state, op, info->resolved_node,
273
                                       info->obj_desc->method.aml_start,
274
                                       info->obj_desc->method.aml_length, info,
275
                                       info->pass_number);
276
        if (ACPI_FAILURE(status)) {
277
                acpi_ds_delete_walk_state(walk_state);
278
                goto cleanup;
279
        }
280
 
281
        /* Parse the AML */
282
 
283
        status = acpi_ps_parse_aml(walk_state);
284
 
285
        /* walk_state was deleted by parse_aml */
286
 
287
      cleanup:
288
        acpi_ps_delete_parse_tree(op);
289
 
290
        /* End optional tracing */
291
 
292
        acpi_ps_stop_trace(info);
293
 
294
        /* Take away the extra reference that we gave the parameters above */
295
 
296
        acpi_ps_update_parameter_list(info, REF_DECREMENT);
297
 
298
        /* Exit now if error above */
299
 
300
        if (ACPI_FAILURE(status)) {
301
                return_ACPI_STATUS(status);
302
        }
303
 
304
        /*
305
         * If the method has returned an object, signal this to the caller with
306
         * a control exception code
307
         */
308
        if (info->return_object) {
309
                ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "Method returned ObjDesc=%p\n",
310
                                  info->return_object));
311
                ACPI_DUMP_STACK_ENTRY(info->return_object);
312
 
313
                status = AE_CTRL_RETURN_VALUE;
314
        }
315
 
316
        return_ACPI_STATUS(status);
317
}
318
 
319
/*******************************************************************************
320
 *
321
 * FUNCTION:    acpi_ps_update_parameter_list
322
 *
323
 * PARAMETERS:  Info            - See struct acpi_evaluate_info
324
 *                                (Used: parameter_type and Parameters)
325
 *              Action          - Add or Remove reference
326
 *
327
 * RETURN:      Status
328
 *
329
 * DESCRIPTION: Update reference count on all method parameter objects
330
 *
331
 ******************************************************************************/
332
 
333
static void
334
acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action)
335
{
336
        acpi_native_uint i;
337
 
338
        if ((info->parameter_type == ACPI_PARAM_ARGS) && (info->parameters)) {
339
 
340
                /* Update reference count for each parameter */
341
 
342
                for (i = 0; info->parameters[i]; i++) {
343
 
344
                        /* Ignore errors, just do them all */
345
 
346
                        (void)acpi_ut_update_object_reference(info->
347
                                                              parameters[i],
348
                                                              action);
349
                }
350
        }
351
}

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