1 2 /****************************************************************************** 3 * 4 * Module Name: exoparg3 - AML execution - opcodes with 3 arguments 5 * 6 *****************************************************************************/ 7 8 /* 9 * Copyright (C) 2000 - 2012, Intel Corp. 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 #include <acpi/acpi.h> 46 #include "accommon.h" 47 #include "acinterp.h" 48 #include "acparser.h" 49 #include "amlcode.h" 50 51 #define _COMPONENT ACPI_EXECUTER 52 ACPI_MODULE_NAME("exoparg3") 53 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 !*/ 75 /******************************************************************************* 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 ******************************************************************************/ 86 acpi_status acpi_ex_opcode_3A_0T_0R(struct acpi_walk_state *walk_state) 87 { 88 union acpi_operand_object **operand = &walk_state->operands[0]; 89 struct acpi_signal_fatal_info *fatal; 90 acpi_status status = AE_OK; 91 92 ACPI_FUNCTION_TRACE_STR(ex_opcode_3A_0T_0R, 93 acpi_ps_get_opcode_name(walk_state->opcode)); 94 95 switch (walk_state->opcode) { 96 case AML_FATAL_OP: /* Fatal (fatal_type fatal_code fatal_arg) */ 97 98 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 99 "FatalOp: Type %X Code %X Arg %X <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n", 100 (u32) operand[0]->integer.value, 101 (u32) operand[1]->integer.value, 102 (u32) operand[2]->integer.value)); 103 104 fatal = ACPI_ALLOCATE(sizeof(struct acpi_signal_fatal_info)); 105 if (fatal) { 106 fatal->type = (u32) operand[0]->integer.value; 107 fatal->code = (u32) operand[1]->integer.value; 108 fatal->argument = (u32) operand[2]->integer.value; 109 } 110 111 /* Always signal the OS! */ 112 113 status = acpi_os_signal(ACPI_SIGNAL_FATAL, fatal); 114 115 /* Might return while OS is shutting down, just continue */ 116 117 ACPI_FREE(fatal); 118 break; 119 120 default: 121 122 ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X", 123 walk_state->opcode)); 124 status = AE_AML_BAD_OPCODE; 125 goto cleanup; 126 } 127 128 cleanup: 129 130 return_ACPI_STATUS(status); 131 } 132 133 /******************************************************************************* 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 ******************************************************************************/ 144 145 acpi_status acpi_ex_opcode_3A_1T_1R(struct acpi_walk_state *walk_state) 146 { 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 u64 index; 152 acpi_size length; 153 154 ACPI_FUNCTION_TRACE_STR(ex_opcode_3A_1T_1R, 155 acpi_ps_get_opcode_name(walk_state->opcode)); 156 157 switch (walk_state->opcode) { 158 case AML_MID_OP: /* Mid (Source[0], Index[1], Length[2], Result[3]) */ 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 */ 164 return_desc = acpi_ut_create_internal_object((operand[0])-> 165 common.type); 166 if (!return_desc) { 167 status = AE_NO_MEMORY; 168 goto cleanup; 169 } 170 171 /* Get the Integer values from the objects */ 172 173 index = operand[1]->integer.value; 174 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 */ 180 if (index >= operand[0]->string.length) { 181 length = 0; 182 } 183 184 /* Truncate request if larger than the actual String/Buffer */ 185 186 else if ((index + length) > operand[0]->string.length) { 187 length = (acpi_size) operand[0]->string.length - 188 (acpi_size) index; 189 } 190 191 /* Strings always have a sub-pointer, not so for buffers */ 192 193 switch ((operand[0])->common.type) { 194 case ACPI_TYPE_STRING: 195 196 /* Always allocate a new buffer for the String */ 197 198 buffer = ACPI_ALLOCATE_ZEROED((acpi_size) length + 1); 199 if (!buffer) { 200 status = AE_NO_MEMORY; 201 goto cleanup; 202 } 203 break; 204 205 case ACPI_TYPE_BUFFER: 206 207 /* If the requested length is zero, don't allocate a buffer */ 208 209 if (length > 0) { 210 211 /* Allocate a new buffer for the Buffer */ 212 213 buffer = ACPI_ALLOCATE_ZEROED(length); 214 if (!buffer) { 215 status = AE_NO_MEMORY; 216 goto cleanup; 217 } 218 } 219 break; 220 221 default: /* Should not happen */ 222 223 status = AE_AML_OPERAND_TYPE; 224 goto cleanup; 225 } 226 227 if (buffer) { 228 229 /* We have a buffer, copy the portion requested */ 230 231 ACPI_MEMCPY(buffer, operand[0]->string.pointer + index, 232 length); 233 } 234 235 /* Set the length of the new String/Buffer */ 236 237 return_desc->string.pointer = buffer; 238 return_desc->string.length = (u32) length; 239 240 /* Mark buffer initialized */ 241 242 return_desc->buffer.flags |= AOPOBJ_DATA_VALID; 243 break; 244 245 default: 246 247 ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X", 248 walk_state->opcode)); 249 status = AE_AML_BAD_OPCODE; 250 goto cleanup; 251 } 252 253 /* Store the result in the target */ 254 255 status = acpi_ex_store(return_desc, operand[3], walk_state); 256 257 cleanup: 258 259 /* Delete return object on error */ 260 261 if (ACPI_FAILURE(status) || walk_state->result_obj) { 262 acpi_ut_remove_reference(return_desc); 263 walk_state->result_obj = NULL; 264 } 265 266 /* Set the return object and exit */ 267 268 else { 269 walk_state->result_obj = return_desc; 270 } 271 return_ACPI_STATUS(status); 272 } 273