Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | |
| 2 | /****************************************************************************** |
| 3 | * |
| 4 | * Module Name: exoparg3 - AML execution - opcodes with 3 arguments |
| 5 | * |
| 6 | *****************************************************************************/ |
| 7 | |
| 8 | /* |
Bob Moore | 4a90c7e | 2006-01-13 16:22:00 -0500 | [diff] [blame] | 9 | * Copyright (C) 2000 - 2006, R. Byron Moore |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include <acpi/acpi.h> |
| 46 | #include <acpi/acinterp.h> |
| 47 | #include <acpi/acparser.h> |
| 48 | #include <acpi/amlcode.h> |
| 49 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #define _COMPONENT ACPI_EXECUTER |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 51 | ACPI_MODULE_NAME("exoparg3") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
| 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | /******************************************************************************* |
| 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 Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 85 | acpi_status acpi_ex_opcode_3A_0T_0R(struct acpi_walk_state *walk_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 87 | union acpi_operand_object **operand = &walk_state->operands[0]; |
| 88 | struct acpi_signal_fatal_info *fatal; |
| 89 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 91 | ACPI_FUNCTION_TRACE_STR("ex_opcode_3A_0T_0R", |
| 92 | acpi_ps_get_opcode_name(walk_state->opcode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
| 94 | switch (walk_state->opcode) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 95 | case AML_FATAL_OP: /* Fatal (fatal_type fatal_code fatal_arg) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 97 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 98 | "fatal_op: Type %X Code %X Arg %X <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n", |
| 99 | (u32) operand[0]->integer.value, |
| 100 | (u32) operand[1]->integer.value, |
| 101 | (u32) operand[2]->integer.value)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 103 | fatal = |
| 104 | ACPI_MEM_ALLOCATE(sizeof(struct acpi_signal_fatal_info)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | if (fatal) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 106 | fatal->type = (u32) operand[0]->integer.value; |
| 107 | fatal->code = (u32) operand[1]->integer.value; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | fatal->argument = (u32) operand[2]->integer.value; |
| 109 | } |
| 110 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 111 | /* Always signal the OS! */ |
| 112 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 113 | status = acpi_os_signal(ACPI_SIGNAL_FATAL, fatal); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | |
| 115 | /* Might return while OS is shutting down, just continue */ |
| 116 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 117 | ACPI_MEM_FREE(fatal); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | break; |
| 119 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | default: |
| 121 | |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 122 | ACPI_ERROR((AE_INFO, "Unknown AML opcode %X", |
| 123 | walk_state->opcode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | status = AE_AML_BAD_OPCODE; |
| 125 | goto cleanup; |
| 126 | } |
| 127 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 128 | cleanup: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 130 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | } |
| 132 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | /******************************************************************************* |
| 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 Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 145 | acpi_status acpi_ex_opcode_3A_1T_1R(struct acpi_walk_state *walk_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 147 | 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; |
| 151 | acpi_integer index; |
| 152 | acpi_size length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 154 | ACPI_FUNCTION_TRACE_STR("ex_opcode_3A_1T_1R", |
| 155 | acpi_ps_get_opcode_name(walk_state->opcode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | |
| 157 | switch (walk_state->opcode) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 158 | case AML_MID_OP: /* Mid (Source[0], Index[1], Length[2], Result[3]) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | |
| 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 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 164 | return_desc = |
| 165 | acpi_ut_create_internal_object(ACPI_GET_OBJECT_TYPE |
| 166 | (operand[0])); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | if (!return_desc) { |
| 168 | status = AE_NO_MEMORY; |
| 169 | goto cleanup; |
| 170 | } |
| 171 | |
| 172 | /* Get the Integer values from the objects */ |
| 173 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 174 | index = operand[1]->integer.value; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | length = (acpi_size) operand[2]->integer.value; |
| 176 | |
| 177 | /* |
| 178 | * If the index is beyond the length of the String/Buffer, or if the |
| 179 | * requested length is zero, return a zero-length String/Buffer |
| 180 | */ |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 181 | if (index >= operand[0]->string.length) { |
| 182 | length = 0; |
| 183 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 185 | /* Truncate request if larger than the actual String/Buffer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 187 | else if ((index + length) > operand[0]->string.length) { |
| 188 | length = (acpi_size) operand[0]->string.length - |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 189 | (acpi_size) index; |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | /* Strings always have a sub-pointer, not so for buffers */ |
| 193 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 194 | switch (ACPI_GET_OBJECT_TYPE(operand[0])) { |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 195 | case ACPI_TYPE_STRING: |
| 196 | |
| 197 | /* Always allocate a new buffer for the String */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 199 | buffer = ACPI_MEM_CALLOCATE((acpi_size) length + 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | if (!buffer) { |
| 201 | status = AE_NO_MEMORY; |
| 202 | goto cleanup; |
| 203 | } |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 204 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 206 | case ACPI_TYPE_BUFFER: |
| 207 | |
| 208 | /* If the requested length is zero, don't allocate a buffer */ |
| 209 | |
| 210 | if (length > 0) { |
| 211 | /* Allocate a new buffer for the Buffer */ |
| 212 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 213 | buffer = ACPI_MEM_CALLOCATE(length); |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 214 | if (!buffer) { |
| 215 | status = AE_NO_MEMORY; |
| 216 | goto cleanup; |
| 217 | } |
| 218 | } |
| 219 | break; |
| 220 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 221 | default: /* Should not happen */ |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 222 | |
| 223 | status = AE_AML_OPERAND_TYPE; |
| 224 | goto cleanup; |
| 225 | } |
| 226 | |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 227 | if (buffer) { |
| 228 | /* We have a buffer, copy the portion requested */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 230 | ACPI_MEMCPY(buffer, operand[0]->string.pointer + index, |
| 231 | length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | } |
| 233 | |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 234 | /* Set the length of the new String/Buffer */ |
| 235 | |
| 236 | return_desc->string.pointer = buffer; |
| 237 | return_desc->string.length = (u32) length; |
| 238 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | /* Mark buffer initialized */ |
| 240 | |
| 241 | return_desc->buffer.flags |= AOPOBJ_DATA_VALID; |
| 242 | break; |
| 243 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | default: |
| 245 | |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 246 | ACPI_ERROR((AE_INFO, "Unknown AML opcode %X", |
| 247 | walk_state->opcode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | status = AE_AML_BAD_OPCODE; |
| 249 | goto cleanup; |
| 250 | } |
| 251 | |
| 252 | /* Store the result in the target */ |
| 253 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 254 | status = acpi_ex_store(return_desc, operand[3], walk_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 256 | cleanup: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | |
| 258 | /* Delete return object on error */ |
| 259 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 260 | if (ACPI_FAILURE(status) || walk_state->result_obj) { |
| 261 | acpi_ut_remove_reference(return_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | } |
| 263 | |
| 264 | /* Set the return object and exit */ |
| 265 | |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 266 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | walk_state->result_obj = return_desc; |
| 268 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 269 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | } |