blob: 7a08d23befcd477fbff77dfc47cde724ac4f606a [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001
2/******************************************************************************
3 *
4 * Module Name: exoparg3 - AML execution - opcodes with 3 arguments
5 *
6 *****************************************************************************/
7
8/*
Bob Moorea8357b02010-01-22 19:07:36 +08009 * Copyright (C) 2000 - 2010, Intel Corp.
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <acpi/acpi.h>
Len Browne2f7a772009-01-09 00:30:03 -050046#include "accommon.h"
47#include "acinterp.h"
48#include "acparser.h"
49#include "amlcode.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#define _COMPONENT ACPI_EXECUTER
Len Brown4be44fc2005-08-05 00:44:28 -040052ACPI_MODULE_NAME("exoparg3")
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
54/*!
55 * Naming convention for AML interpreter execution routines.
56 *
57 * The routines that begin execution of AML opcodes are named with a common
58 * convention based upon the number of arguments, the number of target operands,
59 * and whether or not a value is returned:
60 *
61 * AcpiExOpcode_xA_yT_zR
62 *
63 * Where:
64 *
65 * xA - ARGUMENTS: The number of arguments (input operands) that are
66 * required for this opcode type (1 through 6 args).
67 * yT - TARGETS: The number of targets (output operands) that are required
68 * for this opcode type (0, 1, or 2 targets).
69 * zR - RETURN VALUE: Indicates whether this opcode type returns a value
70 * as the function return (0 or 1).
71 *
72 * The AcpiExOpcode* functions are called via the Dispatcher component with
73 * fully resolved operands.
74!*/
Linus Torvalds1da177e2005-04-16 15:20:36 -070075/*******************************************************************************
76 *
77 * FUNCTION: acpi_ex_opcode_3A_0T_0R
78 *
79 * PARAMETERS: walk_state - Current walk state
80 *
81 * RETURN: Status
82 *
83 * DESCRIPTION: Execute Triadic operator (3 operands)
84 *
85 ******************************************************************************/
Len Brown4be44fc2005-08-05 00:44:28 -040086acpi_status acpi_ex_opcode_3A_0T_0R(struct acpi_walk_state *walk_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -070087{
Len Brown4be44fc2005-08-05 00:44:28 -040088 union acpi_operand_object **operand = &walk_state->operands[0];
89 struct acpi_signal_fatal_info *fatal;
90 acpi_status status = AE_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
Bob Mooreb229cf92006-04-21 17:15:00 -040092 ACPI_FUNCTION_TRACE_STR(ex_opcode_3A_0T_0R,
Len Brown4be44fc2005-08-05 00:44:28 -040093 acpi_ps_get_opcode_name(walk_state->opcode));
Linus Torvalds1da177e2005-04-16 15:20:36 -070094
95 switch (walk_state->opcode) {
Len Brown4be44fc2005-08-05 00:44:28 -040096 case AML_FATAL_OP: /* Fatal (fatal_type fatal_code fatal_arg) */
Linus Torvalds1da177e2005-04-16 15:20:36 -070097
Len Brown4be44fc2005-08-05 00:44:28 -040098 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Bob Mooreb229cf92006-04-21 17:15:00 -040099 "FatalOp: Type %X Code %X Arg %X <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400100 (u32) operand[0]->integer.value,
101 (u32) operand[1]->integer.value,
102 (u32) operand[2]->integer.value));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
Bob Moore83135242006-10-03 00:00:00 -0400104 fatal = ACPI_ALLOCATE(sizeof(struct acpi_signal_fatal_info));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 if (fatal) {
Len Brown4be44fc2005-08-05 00:44:28 -0400106 fatal->type = (u32) operand[0]->integer.value;
107 fatal->code = (u32) operand[1]->integer.value;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 fatal->argument = (u32) operand[2]->integer.value;
109 }
110
Robert Moore44f6c012005-04-18 22:49:35 -0400111 /* Always signal the OS! */
112
Len Brown4be44fc2005-08-05 00:44:28 -0400113 status = acpi_os_signal(ACPI_SIGNAL_FATAL, fatal);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114
115 /* Might return while OS is shutting down, just continue */
116
Bob Moore83135242006-10-03 00:00:00 -0400117 ACPI_FREE(fatal);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 break;
119
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 default:
121
Bob Mooref6a22b02010-03-05 17:56:40 +0800122 ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
Bob Mooreb8e4d892006-01-27 16:43:00 -0500123 walk_state->opcode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 status = AE_AML_BAD_OPCODE;
125 goto cleanup;
126 }
127
Len Brown4be44fc2005-08-05 00:44:28 -0400128 cleanup:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129
Len Brown4be44fc2005-08-05 00:44:28 -0400130 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131}
132
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133/*******************************************************************************
134 *
135 * FUNCTION: acpi_ex_opcode_3A_1T_1R
136 *
137 * PARAMETERS: walk_state - Current walk state
138 *
139 * RETURN: Status
140 *
141 * DESCRIPTION: Execute Triadic operator (3 operands)
142 *
143 ******************************************************************************/
144
Len Brown4be44fc2005-08-05 00:44:28 -0400145acpi_status acpi_ex_opcode_3A_1T_1R(struct acpi_walk_state *walk_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146{
Len Brown4be44fc2005-08-05 00:44:28 -0400147 union acpi_operand_object **operand = &walk_state->operands[0];
148 union acpi_operand_object *return_desc = NULL;
149 char *buffer = NULL;
150 acpi_status status = AE_OK;
Bob Moore5df7e6c2010-01-21 10:06:32 +0800151 u64 index;
Len Brown4be44fc2005-08-05 00:44:28 -0400152 acpi_size length;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153
Bob Mooreb229cf92006-04-21 17:15:00 -0400154 ACPI_FUNCTION_TRACE_STR(ex_opcode_3A_1T_1R,
Len Brown4be44fc2005-08-05 00:44:28 -0400155 acpi_ps_get_opcode_name(walk_state->opcode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
157 switch (walk_state->opcode) {
Len Brown4be44fc2005-08-05 00:44:28 -0400158 case AML_MID_OP: /* Mid (Source[0], Index[1], Length[2], Result[3]) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159
160 /*
161 * Create the return object. The Source operand is guaranteed to be
162 * either a String or a Buffer, so just use its type.
163 */
Bob Moore3371c192009-02-18 14:44:03 +0800164 return_desc = acpi_ut_create_internal_object((operand[0])->
165 common.type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 if (!return_desc) {
167 status = AE_NO_MEMORY;
168 goto cleanup;
169 }
170
171 /* Get the Integer values from the objects */
172
Robert Moore44f6c012005-04-18 22:49:35 -0400173 index = operand[1]->integer.value;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 length = (acpi_size) operand[2]->integer.value;
175
176 /*
177 * If the index is beyond the length of the String/Buffer, or if the
178 * requested length is zero, return a zero-length String/Buffer
179 */
Robert Moore73459f72005-06-24 00:00:00 -0400180 if (index >= operand[0]->string.length) {
181 length = 0;
182 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183
Robert Moore73459f72005-06-24 00:00:00 -0400184 /* Truncate request if larger than the actual String/Buffer */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185
Robert Moore73459f72005-06-24 00:00:00 -0400186 else if ((index + length) > operand[0]->string.length) {
187 length = (acpi_size) operand[0]->string.length -
Len Brown4be44fc2005-08-05 00:44:28 -0400188 (acpi_size) index;
Robert Moore73459f72005-06-24 00:00:00 -0400189 }
190
191 /* Strings always have a sub-pointer, not so for buffers */
192
Bob Moore3371c192009-02-18 14:44:03 +0800193 switch ((operand[0])->common.type) {
Robert Moore73459f72005-06-24 00:00:00 -0400194 case ACPI_TYPE_STRING:
195
196 /* Always allocate a new buffer for the String */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
Bob Moore83135242006-10-03 00:00:00 -0400198 buffer = ACPI_ALLOCATE_ZEROED((acpi_size) length + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 if (!buffer) {
200 status = AE_NO_MEMORY;
201 goto cleanup;
202 }
Robert Moore73459f72005-06-24 00:00:00 -0400203 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204
Robert Moore73459f72005-06-24 00:00:00 -0400205 case ACPI_TYPE_BUFFER:
206
207 /* If the requested length is zero, don't allocate a buffer */
208
209 if (length > 0) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400210
Robert Moore73459f72005-06-24 00:00:00 -0400211 /* Allocate a new buffer for the Buffer */
212
Bob Moore83135242006-10-03 00:00:00 -0400213 buffer = ACPI_ALLOCATE_ZEROED(length);
Robert Moore73459f72005-06-24 00:00:00 -0400214 if (!buffer) {
215 status = AE_NO_MEMORY;
216 goto cleanup;
217 }
218 }
219 break;
220
Len Brown4be44fc2005-08-05 00:44:28 -0400221 default: /* Should not happen */
Robert Moore73459f72005-06-24 00:00:00 -0400222
223 status = AE_AML_OPERAND_TYPE;
224 goto cleanup;
225 }
226
Bob Mooredefba1d2005-12-16 17:05:00 -0500227 if (buffer) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400228
Bob Mooredefba1d2005-12-16 17:05:00 -0500229 /* We have a buffer, copy the portion requested */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
Len Brown4be44fc2005-08-05 00:44:28 -0400231 ACPI_MEMCPY(buffer, operand[0]->string.pointer + index,
232 length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 }
234
Robert Moore73459f72005-06-24 00:00:00 -0400235 /* Set the length of the new String/Buffer */
236
237 return_desc->string.pointer = buffer;
238 return_desc->string.length = (u32) length;
239
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 /* Mark buffer initialized */
241
242 return_desc->buffer.flags |= AOPOBJ_DATA_VALID;
243 break;
244
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 default:
246
Bob Mooref6a22b02010-03-05 17:56:40 +0800247 ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
Bob Mooreb8e4d892006-01-27 16:43:00 -0500248 walk_state->opcode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 status = AE_AML_BAD_OPCODE;
250 goto cleanup;
251 }
252
253 /* Store the result in the target */
254
Len Brown4be44fc2005-08-05 00:44:28 -0400255 status = acpi_ex_store(return_desc, operand[3], walk_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256
Len Brown4be44fc2005-08-05 00:44:28 -0400257 cleanup:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258
259 /* Delete return object on error */
260
Len Brown4be44fc2005-08-05 00:44:28 -0400261 if (ACPI_FAILURE(status) || walk_state->result_obj) {
262 acpi_ut_remove_reference(return_desc);
Bob Moore4b6e16c2008-04-10 19:06:37 +0400263 walk_state->result_obj = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 }
265
266 /* Set the return object and exit */
267
Robert Moore73459f72005-06-24 00:00:00 -0400268 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 walk_state->result_obj = return_desc;
270 }
Len Brown4be44fc2005-08-05 00:44:28 -0400271 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272}