blob: 363767cf01e5af3c09e4401fc78166ae4aa78ece [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/******************************************************************************
2 *
3 * Module Name: exoparg3 - AML execution - opcodes with 3 arguments
4 *
5 *****************************************************************************/
6
7/*
Bob Moorefbb7a2d2014-02-08 09:42:25 +08008 * Copyright (C) 2000 - 2014, Intel Corp.
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * 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
19 * ("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
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <acpi/acpi.h>
Len Browne2f7a772009-01-09 00:30:03 -050045#include "accommon.h"
46#include "acinterp.h"
47#include "acparser.h"
48#include "amlcode.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
Linus Torvalds1da177e2005-04-16 15:20:36 -070050#define _COMPONENT ACPI_EXECUTER
Len Brown4be44fc2005-08-05 00:44:28 -040051ACPI_MODULE_NAME("exoparg3")
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
53/*!
54 * Naming convention for AML interpreter execution routines.
55 *
56 * The routines that begin execution of AML opcodes are named with a common
57 * convention based upon the number of arguments, the number of target operands,
58 * and whether or not a value is returned:
59 *
60 * AcpiExOpcode_xA_yT_zR
61 *
62 * Where:
63 *
64 * xA - ARGUMENTS: The number of arguments (input operands) that are
65 * required for this opcode type (1 through 6 args).
66 * yT - TARGETS: The number of targets (output operands) that are required
67 * for this opcode type (0, 1, or 2 targets).
68 * zR - RETURN VALUE: Indicates whether this opcode type returns a value
69 * as the function return (0 or 1).
70 *
71 * The AcpiExOpcode* functions are called via the Dispatcher component with
72 * fully resolved operands.
73!*/
Linus Torvalds1da177e2005-04-16 15:20:36 -070074/*******************************************************************************
75 *
76 * FUNCTION: acpi_ex_opcode_3A_0T_0R
77 *
78 * PARAMETERS: walk_state - Current walk state
79 *
80 * RETURN: Status
81 *
82 * DESCRIPTION: Execute Triadic operator (3 operands)
83 *
84 ******************************************************************************/
Len Brown4be44fc2005-08-05 00:44:28 -040085acpi_status acpi_ex_opcode_3A_0T_0R(struct acpi_walk_state *walk_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -070086{
Len Brown4be44fc2005-08-05 00:44:28 -040087 union acpi_operand_object **operand = &walk_state->operands[0];
88 struct acpi_signal_fatal_info *fatal;
89 acpi_status status = AE_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
Bob Mooreb229cf92006-04-21 17:15:00 -040091 ACPI_FUNCTION_TRACE_STR(ex_opcode_3A_0T_0R,
Len Brown4be44fc2005-08-05 00:44:28 -040092 acpi_ps_get_opcode_name(walk_state->opcode));
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
94 switch (walk_state->opcode) {
Len Brown4be44fc2005-08-05 00:44:28 -040095 case AML_FATAL_OP: /* Fatal (fatal_type fatal_code fatal_arg) */
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
Len Brown4be44fc2005-08-05 00:44:28 -040097 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Bob Mooreb229cf92006-04-21 17:15:00 -040098 "FatalOp: Type %X Code %X Arg %X <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n",
Len Brown4be44fc2005-08-05 00:44:28 -040099 (u32) operand[0]->integer.value,
100 (u32) operand[1]->integer.value,
101 (u32) operand[2]->integer.value));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
Bob Moore83135242006-10-03 00:00:00 -0400103 fatal = ACPI_ALLOCATE(sizeof(struct acpi_signal_fatal_info));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 if (fatal) {
Len Brown4be44fc2005-08-05 00:44:28 -0400105 fatal->type = (u32) operand[0]->integer.value;
106 fatal->code = (u32) operand[1]->integer.value;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 fatal->argument = (u32) operand[2]->integer.value;
108 }
109
Robert Moore44f6c012005-04-18 22:49:35 -0400110 /* Always signal the OS! */
111
Len Brown4be44fc2005-08-05 00:44:28 -0400112 status = acpi_os_signal(ACPI_SIGNAL_FATAL, fatal);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
114 /* Might return while OS is shutting down, just continue */
115
Bob Moore83135242006-10-03 00:00:00 -0400116 ACPI_FREE(fatal);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 break;
118
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 default:
120
Bob Mooref6a22b02010-03-05 17:56:40 +0800121 ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
Bob Mooreb8e4d892006-01-27 16:43:00 -0500122 walk_state->opcode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 status = AE_AML_BAD_OPCODE;
124 goto cleanup;
125 }
126
Lv Zheng10622bf2013-10-29 09:30:02 +0800127cleanup:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128
Len Brown4be44fc2005-08-05 00:44:28 -0400129 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130}
131
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132/*******************************************************************************
133 *
134 * FUNCTION: acpi_ex_opcode_3A_1T_1R
135 *
136 * PARAMETERS: walk_state - Current walk state
137 *
138 * RETURN: Status
139 *
140 * DESCRIPTION: Execute Triadic operator (3 operands)
141 *
142 ******************************************************************************/
143
Len Brown4be44fc2005-08-05 00:44:28 -0400144acpi_status acpi_ex_opcode_3A_1T_1R(struct acpi_walk_state *walk_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145{
Len Brown4be44fc2005-08-05 00:44:28 -0400146 union acpi_operand_object **operand = &walk_state->operands[0];
147 union acpi_operand_object *return_desc = NULL;
148 char *buffer = NULL;
149 acpi_status status = AE_OK;
Bob Moore5df7e6c2010-01-21 10:06:32 +0800150 u64 index;
Len Brown4be44fc2005-08-05 00:44:28 -0400151 acpi_size length;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152
Bob Mooreb229cf92006-04-21 17:15:00 -0400153 ACPI_FUNCTION_TRACE_STR(ex_opcode_3A_1T_1R,
Len Brown4be44fc2005-08-05 00:44:28 -0400154 acpi_ps_get_opcode_name(walk_state->opcode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
156 switch (walk_state->opcode) {
Len Brown4be44fc2005-08-05 00:44:28 -0400157 case AML_MID_OP: /* Mid (Source[0], Index[1], Length[2], Result[3]) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 /*
Bob Moore73a30902012-10-31 02:26:55 +0000159 * Create the return object. The Source operand is guaranteed to be
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 * either a String or a Buffer, so just use its type.
161 */
Bob Moore3371c192009-02-18 14:44:03 +0800162 return_desc = acpi_ut_create_internal_object((operand[0])->
163 common.type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 if (!return_desc) {
165 status = AE_NO_MEMORY;
166 goto cleanup;
167 }
168
169 /* Get the Integer values from the objects */
170
Robert Moore44f6c012005-04-18 22:49:35 -0400171 index = operand[1]->integer.value;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 length = (acpi_size) operand[2]->integer.value;
173
174 /*
175 * If the index is beyond the length of the String/Buffer, or if the
176 * requested length is zero, return a zero-length String/Buffer
177 */
Robert Moore73459f72005-06-24 00:00:00 -0400178 if (index >= operand[0]->string.length) {
179 length = 0;
180 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
Robert Moore73459f72005-06-24 00:00:00 -0400182 /* Truncate request if larger than the actual String/Buffer */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183
Robert Moore73459f72005-06-24 00:00:00 -0400184 else if ((index + length) > operand[0]->string.length) {
185 length = (acpi_size) operand[0]->string.length -
Len Brown4be44fc2005-08-05 00:44:28 -0400186 (acpi_size) index;
Robert Moore73459f72005-06-24 00:00:00 -0400187 }
188
189 /* Strings always have a sub-pointer, not so for buffers */
190
Bob Moore3371c192009-02-18 14:44:03 +0800191 switch ((operand[0])->common.type) {
Robert Moore73459f72005-06-24 00:00:00 -0400192 case ACPI_TYPE_STRING:
193
194 /* Always allocate a new buffer for the String */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195
Bob Moore83135242006-10-03 00:00:00 -0400196 buffer = ACPI_ALLOCATE_ZEROED((acpi_size) length + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 if (!buffer) {
198 status = AE_NO_MEMORY;
199 goto cleanup;
200 }
Robert Moore73459f72005-06-24 00:00:00 -0400201 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202
Robert Moore73459f72005-06-24 00:00:00 -0400203 case ACPI_TYPE_BUFFER:
204
205 /* If the requested length is zero, don't allocate a buffer */
206
207 if (length > 0) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400208
Robert Moore73459f72005-06-24 00:00:00 -0400209 /* Allocate a new buffer for the Buffer */
210
Bob Moore83135242006-10-03 00:00:00 -0400211 buffer = ACPI_ALLOCATE_ZEROED(length);
Robert Moore73459f72005-06-24 00:00:00 -0400212 if (!buffer) {
213 status = AE_NO_MEMORY;
214 goto cleanup;
215 }
216 }
217 break;
218
Len Brown4be44fc2005-08-05 00:44:28 -0400219 default: /* Should not happen */
Robert Moore73459f72005-06-24 00:00:00 -0400220
221 status = AE_AML_OPERAND_TYPE;
222 goto cleanup;
223 }
224
Bob Mooredefba1d2005-12-16 17:05:00 -0500225 if (buffer) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400226
Bob Mooredefba1d2005-12-16 17:05:00 -0500227 /* We have a buffer, copy the portion requested */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
Len Brown4be44fc2005-08-05 00:44:28 -0400229 ACPI_MEMCPY(buffer, operand[0]->string.pointer + index,
230 length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 }
232
Robert Moore73459f72005-06-24 00:00:00 -0400233 /* Set the length of the new String/Buffer */
234
235 return_desc->string.pointer = buffer;
236 return_desc->string.length = (u32) length;
237
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 /* Mark buffer initialized */
239
240 return_desc->buffer.flags |= AOPOBJ_DATA_VALID;
241 break;
242
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 default:
244
Bob Mooref6a22b02010-03-05 17:56:40 +0800245 ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
Bob Mooreb8e4d892006-01-27 16:43:00 -0500246 walk_state->opcode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 status = AE_AML_BAD_OPCODE;
248 goto cleanup;
249 }
250
251 /* Store the result in the target */
252
Len Brown4be44fc2005-08-05 00:44:28 -0400253 status = acpi_ex_store(return_desc, operand[3], walk_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254
Lv Zheng10622bf2013-10-29 09:30:02 +0800255cleanup:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256
257 /* Delete return object on error */
258
Len Brown4be44fc2005-08-05 00:44:28 -0400259 if (ACPI_FAILURE(status) || walk_state->result_obj) {
260 acpi_ut_remove_reference(return_desc);
Bob Moore4b6e16c2008-04-10 19:06:37 +0400261 walk_state->result_obj = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 }
263
264 /* Set the return object and exit */
265
Robert Moore73459f72005-06-24 00:00:00 -0400266 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 walk_state->result_obj = return_desc;
268 }
Len Brown4be44fc2005-08-05 00:44:28 -0400269 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270}