[CPUFREQ] Add support to cpufreq_ondemand to ignore 'nice' cpu time
[linux-2.6] / drivers / acpi / executer / exoparg3.c
1
2 /******************************************************************************
3  *
4  * Module Name: exoparg3 - AML execution - opcodes with 3 arguments
5  *
6  *****************************************************************************/
7
8 /*
9  * Copyright (C) 2000 - 2005, R. Byron Moore
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
46 #include <acpi/acpi.h>
47 #include <acpi/acinterp.h>
48 #include <acpi/acparser.h>
49 #include <acpi/amlcode.h>
50
51
52 #define _COMPONENT          ACPI_EXECUTER
53          ACPI_MODULE_NAME    ("exoparg3")
54
55
56 /*!
57  * Naming convention for AML interpreter execution routines.
58  *
59  * The routines that begin execution of AML opcodes are named with a common
60  * convention based upon the number of arguments, the number of target operands,
61  * and whether or not a value is returned:
62  *
63  *      AcpiExOpcode_xA_yT_zR
64  *
65  * Where:
66  *
67  * xA - ARGUMENTS:    The number of arguments (input operands) that are
68  *                    required for this opcode type (1 through 6 args).
69  * yT - TARGETS:      The number of targets (output operands) that are required
70  *                    for this opcode type (0, 1, or 2 targets).
71  * zR - RETURN VALUE: Indicates whether this opcode type returns a value
72  *                    as the function return (0 or 1).
73  *
74  * The AcpiExOpcode* functions are called via the Dispatcher component with
75  * fully resolved operands.
76 !*/
77
78
79 /*******************************************************************************
80  *
81  * FUNCTION:    acpi_ex_opcode_3A_0T_0R
82  *
83  * PARAMETERS:  walk_state          - Current walk state
84  *
85  * RETURN:      Status
86  *
87  * DESCRIPTION: Execute Triadic operator (3 operands)
88  *
89  ******************************************************************************/
90
91 acpi_status
92 acpi_ex_opcode_3A_0T_0R (
93         struct acpi_walk_state          *walk_state)
94 {
95         union acpi_operand_object       **operand = &walk_state->operands[0];
96         struct acpi_signal_fatal_info   *fatal;
97         acpi_status                     status = AE_OK;
98
99
100         ACPI_FUNCTION_TRACE_STR ("ex_opcode_3A_0T_0R", acpi_ps_get_opcode_name (walk_state->opcode));
101
102
103         switch (walk_state->opcode) {
104         case AML_FATAL_OP:          /* Fatal (fatal_type fatal_code fatal_arg)   */
105
106                 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
107                         "fatal_op: Type %X Code %X Arg %X <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n",
108                         (u32) operand[0]->integer.value,
109                         (u32) operand[1]->integer.value,
110                         (u32) operand[2]->integer.value));
111
112                 fatal = ACPI_MEM_ALLOCATE (sizeof (struct acpi_signal_fatal_info));
113                 if (fatal) {
114                         fatal->type     = (u32) operand[0]->integer.value;
115                         fatal->code     = (u32) operand[1]->integer.value;
116                         fatal->argument = (u32) operand[2]->integer.value;
117                 }
118
119                 /*
120                  * Always signal the OS!
121                  */
122                 status = acpi_os_signal (ACPI_SIGNAL_FATAL, fatal);
123
124                 /* Might return while OS is shutting down, just continue */
125
126                 ACPI_MEM_FREE (fatal);
127                 break;
128
129
130         default:
131
132                 ACPI_REPORT_ERROR (("acpi_ex_opcode_3A_0T_0R: Unknown opcode %X\n",
133                                 walk_state->opcode));
134                 status = AE_AML_BAD_OPCODE;
135                 goto cleanup;
136         }
137
138
139 cleanup:
140
141         return_ACPI_STATUS (status);
142 }
143
144
145 /*******************************************************************************
146  *
147  * FUNCTION:    acpi_ex_opcode_3A_1T_1R
148  *
149  * PARAMETERS:  walk_state          - Current walk state
150  *
151  * RETURN:      Status
152  *
153  * DESCRIPTION: Execute Triadic operator (3 operands)
154  *
155  ******************************************************************************/
156
157 acpi_status
158 acpi_ex_opcode_3A_1T_1R (
159         struct acpi_walk_state          *walk_state)
160 {
161         union acpi_operand_object       **operand = &walk_state->operands[0];
162         union acpi_operand_object       *return_desc = NULL;
163         char                            *buffer;
164         acpi_status                     status = AE_OK;
165         acpi_native_uint                index;
166         acpi_size                       length;
167
168
169         ACPI_FUNCTION_TRACE_STR ("ex_opcode_3A_1T_1R", acpi_ps_get_opcode_name (walk_state->opcode));
170
171
172         switch (walk_state->opcode) {
173         case AML_MID_OP:        /* Mid  (Source[0], Index[1], Length[2], Result[3]) */
174
175                 /*
176                  * Create the return object.  The Source operand is guaranteed to be
177                  * either a String or a Buffer, so just use its type.
178                  */
179                 return_desc = acpi_ut_create_internal_object (ACPI_GET_OBJECT_TYPE (operand[0]));
180                 if (!return_desc) {
181                         status = AE_NO_MEMORY;
182                         goto cleanup;
183                 }
184
185                 /* Get the Integer values from the objects */
186
187                 index = (acpi_native_uint) operand[1]->integer.value;
188                 length = (acpi_size) operand[2]->integer.value;
189
190                 /*
191                  * If the index is beyond the length of the String/Buffer, or if the
192                  * requested length is zero, return a zero-length String/Buffer
193                  */
194                 if ((index < operand[0]->string.length) &&
195                         (length > 0)) {
196                         /* Truncate request if larger than the actual String/Buffer */
197
198                         if ((index + length) >
199                                 operand[0]->string.length) {
200                                 length = (acpi_size) operand[0]->string.length - index;
201                         }
202
203                         /* Allocate a new buffer for the String/Buffer */
204
205                         buffer = ACPI_MEM_CALLOCATE ((acpi_size) length + 1);
206                         if (!buffer) {
207                                 status = AE_NO_MEMORY;
208                                 goto cleanup;
209                         }
210
211                         /* Copy the portion requested */
212
213                         ACPI_MEMCPY (buffer, operand[0]->string.pointer + index,
214                                           length);
215
216                         /* Set the length of the new String/Buffer */
217
218                         return_desc->string.pointer = buffer;
219                         return_desc->string.length = (u32) length;
220                 }
221
222                 /* Mark buffer initialized */
223
224                 return_desc->buffer.flags |= AOPOBJ_DATA_VALID;
225                 break;
226
227
228         default:
229
230                 ACPI_REPORT_ERROR (("acpi_ex_opcode_3A_0T_0R: Unknown opcode %X\n",
231                                 walk_state->opcode));
232                 status = AE_AML_BAD_OPCODE;
233                 goto cleanup;
234         }
235
236         /* Store the result in the target */
237
238         status = acpi_ex_store (return_desc, operand[3], walk_state);
239
240 cleanup:
241
242         /* Delete return object on error */
243
244         if (ACPI_FAILURE (status)) {
245                 acpi_ut_remove_reference (return_desc);
246         }
247
248         /* Set the return object and exit */
249
250         if (!walk_state->result_obj) {
251                 walk_state->result_obj = return_desc;
252         }
253         return_ACPI_STATUS (status);
254 }
255
256