aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/acpi/executer/exoparg3.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/acpi/executer/exoparg3.c')
-rw-r--r--drivers/acpi/executer/exoparg3.c256
1 files changed, 256 insertions, 0 deletions
diff --git a/drivers/acpi/executer/exoparg3.c b/drivers/acpi/executer/exoparg3.c
new file mode 100644
index 000000000000..29d0b167745d
--- /dev/null
+++ b/drivers/acpi/executer/exoparg3.c
@@ -0,0 +1,256 @@
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
91acpi_status
92acpi_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
139cleanup:
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
157acpi_status
158acpi_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
240cleanup:
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