exfield.c revision 1.1.1.2.8.2
1 1.1.1.2.8.2 jruoho /****************************************************************************** 2 1.1.1.2.8.2 jruoho * 3 1.1.1.2.8.2 jruoho * Module Name: exfield - ACPI AML (p-code) execution - field manipulation 4 1.1.1.2.8.2 jruoho * 5 1.1.1.2.8.2 jruoho *****************************************************************************/ 6 1.1.1.2.8.2 jruoho 7 1.1.1.2.8.2 jruoho /* 8 1.1.1.2.8.2 jruoho * Copyright (C) 2000 - 2011, Intel Corp. 9 1.1.1.2.8.2 jruoho * All rights reserved. 10 1.1.1.2.8.2 jruoho * 11 1.1.1.2.8.2 jruoho * Redistribution and use in source and binary forms, with or without 12 1.1.1.2.8.2 jruoho * modification, are permitted provided that the following conditions 13 1.1.1.2.8.2 jruoho * are met: 14 1.1.1.2.8.2 jruoho * 1. Redistributions of source code must retain the above copyright 15 1.1.1.2.8.2 jruoho * notice, this list of conditions, and the following disclaimer, 16 1.1.1.2.8.2 jruoho * without modification. 17 1.1.1.2.8.2 jruoho * 2. Redistributions in binary form must reproduce at minimum a disclaimer 18 1.1.1.2.8.2 jruoho * substantially similar to the "NO WARRANTY" disclaimer below 19 1.1.1.2.8.2 jruoho * ("Disclaimer") and any redistribution must be conditioned upon 20 1.1.1.2.8.2 jruoho * including a substantially similar Disclaimer requirement for further 21 1.1.1.2.8.2 jruoho * binary redistribution. 22 1.1.1.2.8.2 jruoho * 3. Neither the names of the above-listed copyright holders nor the names 23 1.1.1.2.8.2 jruoho * of any contributors may be used to endorse or promote products derived 24 1.1.1.2.8.2 jruoho * from this software without specific prior written permission. 25 1.1.1.2.8.2 jruoho * 26 1.1.1.2.8.2 jruoho * Alternatively, this software may be distributed under the terms of the 27 1.1.1.2.8.2 jruoho * GNU General Public License ("GPL") version 2 as published by the Free 28 1.1.1.2.8.2 jruoho * Software Foundation. 29 1.1.1.2.8.2 jruoho * 30 1.1.1.2.8.2 jruoho * NO WARRANTY 31 1.1.1.2.8.2 jruoho * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32 1.1.1.2.8.2 jruoho * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33 1.1.1.2.8.2 jruoho * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 34 1.1.1.2.8.2 jruoho * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 35 1.1.1.2.8.2 jruoho * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 1.1.1.2.8.2 jruoho * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 1.1.1.2.8.2 jruoho * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 1.1.1.2.8.2 jruoho * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 1.1.1.2.8.2 jruoho * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 40 1.1.1.2.8.2 jruoho * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 41 1.1.1.2.8.2 jruoho * POSSIBILITY OF SUCH DAMAGES. 42 1.1.1.2.8.2 jruoho */ 43 1.1.1.2.8.2 jruoho 44 1.1.1.2.8.2 jruoho 45 1.1.1.2.8.2 jruoho #define __EXFIELD_C__ 46 1.1.1.2.8.2 jruoho 47 1.1.1.2.8.2 jruoho #include "acpi.h" 48 1.1.1.2.8.2 jruoho #include "accommon.h" 49 1.1.1.2.8.2 jruoho #include "acdispat.h" 50 1.1.1.2.8.2 jruoho #include "acinterp.h" 51 1.1.1.2.8.2 jruoho 52 1.1.1.2.8.2 jruoho 53 1.1.1.2.8.2 jruoho #define _COMPONENT ACPI_EXECUTER 54 1.1.1.2.8.2 jruoho ACPI_MODULE_NAME ("exfield") 55 1.1.1.2.8.2 jruoho 56 1.1.1.2.8.2 jruoho 57 1.1.1.2.8.2 jruoho /******************************************************************************* 58 1.1.1.2.8.2 jruoho * 59 1.1.1.2.8.2 jruoho * FUNCTION: AcpiExReadDataFromField 60 1.1.1.2.8.2 jruoho * 61 1.1.1.2.8.2 jruoho * PARAMETERS: WalkState - Current execution state 62 1.1.1.2.8.2 jruoho * ObjDesc - The named field 63 1.1.1.2.8.2 jruoho * RetBufferDesc - Where the return data object is stored 64 1.1.1.2.8.2 jruoho * 65 1.1.1.2.8.2 jruoho * RETURN: Status 66 1.1.1.2.8.2 jruoho * 67 1.1.1.2.8.2 jruoho * DESCRIPTION: Read from a named field. Returns either an Integer or a 68 1.1.1.2.8.2 jruoho * Buffer, depending on the size of the field. 69 1.1.1.2.8.2 jruoho * 70 1.1.1.2.8.2 jruoho ******************************************************************************/ 71 1.1.1.2.8.2 jruoho 72 1.1.1.2.8.2 jruoho ACPI_STATUS 73 1.1.1.2.8.2 jruoho AcpiExReadDataFromField ( 74 1.1.1.2.8.2 jruoho ACPI_WALK_STATE *WalkState, 75 1.1.1.2.8.2 jruoho ACPI_OPERAND_OBJECT *ObjDesc, 76 1.1.1.2.8.2 jruoho ACPI_OPERAND_OBJECT **RetBufferDesc) 77 1.1.1.2.8.2 jruoho { 78 1.1.1.2.8.2 jruoho ACPI_STATUS Status; 79 1.1.1.2.8.2 jruoho ACPI_OPERAND_OBJECT *BufferDesc; 80 1.1.1.2.8.2 jruoho ACPI_SIZE Length; 81 1.1.1.2.8.2 jruoho void *Buffer; 82 1.1.1.2.8.2 jruoho UINT32 Function; 83 1.1.1.2.8.2 jruoho 84 1.1.1.2.8.2 jruoho 85 1.1.1.2.8.2 jruoho ACPI_FUNCTION_TRACE_PTR (ExReadDataFromField, ObjDesc); 86 1.1.1.2.8.2 jruoho 87 1.1.1.2.8.2 jruoho 88 1.1.1.2.8.2 jruoho /* Parameter validation */ 89 1.1.1.2.8.2 jruoho 90 1.1.1.2.8.2 jruoho if (!ObjDesc) 91 1.1.1.2.8.2 jruoho { 92 1.1.1.2.8.2 jruoho return_ACPI_STATUS (AE_AML_NO_OPERAND); 93 1.1.1.2.8.2 jruoho } 94 1.1.1.2.8.2 jruoho if (!RetBufferDesc) 95 1.1.1.2.8.2 jruoho { 96 1.1.1.2.8.2 jruoho return_ACPI_STATUS (AE_BAD_PARAMETER); 97 1.1.1.2.8.2 jruoho } 98 1.1.1.2.8.2 jruoho 99 1.1.1.2.8.2 jruoho if (ObjDesc->Common.Type == ACPI_TYPE_BUFFER_FIELD) 100 1.1.1.2.8.2 jruoho { 101 1.1.1.2.8.2 jruoho /* 102 1.1.1.2.8.2 jruoho * If the BufferField arguments have not been previously evaluated, 103 1.1.1.2.8.2 jruoho * evaluate them now and save the results. 104 1.1.1.2.8.2 jruoho */ 105 1.1.1.2.8.2 jruoho if (!(ObjDesc->Common.Flags & AOPOBJ_DATA_VALID)) 106 1.1.1.2.8.2 jruoho { 107 1.1.1.2.8.2 jruoho Status = AcpiDsGetBufferFieldArguments (ObjDesc); 108 1.1.1.2.8.2 jruoho if (ACPI_FAILURE (Status)) 109 1.1.1.2.8.2 jruoho { 110 1.1.1.2.8.2 jruoho return_ACPI_STATUS (Status); 111 1.1.1.2.8.2 jruoho } 112 1.1.1.2.8.2 jruoho } 113 1.1.1.2.8.2 jruoho } 114 1.1.1.2.8.2 jruoho else if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_REGION_FIELD) && 115 1.1.1.2.8.2 jruoho (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_SMBUS || 116 1.1.1.2.8.2 jruoho ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_IPMI)) 117 1.1.1.2.8.2 jruoho { 118 1.1.1.2.8.2 jruoho /* 119 1.1.1.2.8.2 jruoho * This is an SMBus or IPMI read. We must create a buffer to hold 120 1.1.1.2.8.2 jruoho * the data and then directly access the region handler. 121 1.1.1.2.8.2 jruoho * 122 1.1.1.2.8.2 jruoho * Note: Smbus protocol value is passed in upper 16-bits of Function 123 1.1.1.2.8.2 jruoho */ 124 1.1.1.2.8.2 jruoho if (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_SMBUS) 125 1.1.1.2.8.2 jruoho { 126 1.1.1.2.8.2 jruoho Length = ACPI_SMBUS_BUFFER_SIZE; 127 1.1.1.2.8.2 jruoho Function = ACPI_READ | (ObjDesc->Field.Attribute << 16); 128 1.1.1.2.8.2 jruoho } 129 1.1.1.2.8.2 jruoho else /* IPMI */ 130 1.1.1.2.8.2 jruoho { 131 1.1.1.2.8.2 jruoho Length = ACPI_IPMI_BUFFER_SIZE; 132 1.1.1.2.8.2 jruoho Function = ACPI_READ; 133 1.1.1.2.8.2 jruoho } 134 1.1.1.2.8.2 jruoho 135 1.1.1.2.8.2 jruoho BufferDesc = AcpiUtCreateBufferObject (Length); 136 1.1.1.2.8.2 jruoho if (!BufferDesc) 137 1.1.1.2.8.2 jruoho { 138 1.1.1.2.8.2 jruoho return_ACPI_STATUS (AE_NO_MEMORY); 139 1.1.1.2.8.2 jruoho } 140 1.1.1.2.8.2 jruoho 141 1.1.1.2.8.2 jruoho /* Lock entire transaction if requested */ 142 1.1.1.2.8.2 jruoho 143 1.1.1.2.8.2 jruoho AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags); 144 1.1.1.2.8.2 jruoho 145 1.1.1.2.8.2 jruoho /* Call the region handler for the read */ 146 1.1.1.2.8.2 jruoho 147 1.1.1.2.8.2 jruoho Status = AcpiExAccessRegion (ObjDesc, 0, 148 1.1.1.2.8.2 jruoho ACPI_CAST_PTR (UINT64, BufferDesc->Buffer.Pointer), 149 1.1.1.2.8.2 jruoho Function); 150 1.1.1.2.8.2 jruoho AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags); 151 1.1.1.2.8.2 jruoho goto Exit; 152 1.1.1.2.8.2 jruoho } 153 1.1.1.2.8.2 jruoho 154 1.1.1.2.8.2 jruoho /* 155 1.1.1.2.8.2 jruoho * Allocate a buffer for the contents of the field. 156 1.1.1.2.8.2 jruoho * 157 1.1.1.2.8.2 jruoho * If the field is larger than the current integer width, create 158 1.1.1.2.8.2 jruoho * a BUFFER to hold it. Otherwise, use an INTEGER. This allows 159 1.1.1.2.8.2 jruoho * the use of arithmetic operators on the returned value if the 160 1.1.1.2.8.2 jruoho * field size is equal or smaller than an Integer. 161 1.1.1.2.8.2 jruoho * 162 1.1.1.2.8.2 jruoho * Note: Field.length is in bits. 163 1.1.1.2.8.2 jruoho */ 164 1.1.1.2.8.2 jruoho Length = (ACPI_SIZE) ACPI_ROUND_BITS_UP_TO_BYTES (ObjDesc->Field.BitLength); 165 1.1.1.2.8.2 jruoho if (Length > AcpiGbl_IntegerByteWidth) 166 1.1.1.2.8.2 jruoho { 167 1.1.1.2.8.2 jruoho /* Field is too large for an Integer, create a Buffer instead */ 168 1.1.1.2.8.2 jruoho 169 1.1.1.2.8.2 jruoho BufferDesc = AcpiUtCreateBufferObject (Length); 170 1.1.1.2.8.2 jruoho if (!BufferDesc) 171 1.1.1.2.8.2 jruoho { 172 1.1.1.2.8.2 jruoho return_ACPI_STATUS (AE_NO_MEMORY); 173 1.1.1.2.8.2 jruoho } 174 1.1.1.2.8.2 jruoho Buffer = BufferDesc->Buffer.Pointer; 175 1.1.1.2.8.2 jruoho } 176 1.1.1.2.8.2 jruoho else 177 1.1.1.2.8.2 jruoho { 178 1.1.1.2.8.2 jruoho /* Field will fit within an Integer (normal case) */ 179 1.1.1.2.8.2 jruoho 180 1.1.1.2.8.2 jruoho BufferDesc = AcpiUtCreateIntegerObject ((UINT64) 0); 181 1.1.1.2.8.2 jruoho if (!BufferDesc) 182 1.1.1.2.8.2 jruoho { 183 1.1.1.2.8.2 jruoho return_ACPI_STATUS (AE_NO_MEMORY); 184 1.1.1.2.8.2 jruoho } 185 1.1.1.2.8.2 jruoho 186 1.1.1.2.8.2 jruoho Length = AcpiGbl_IntegerByteWidth; 187 1.1.1.2.8.2 jruoho Buffer = &BufferDesc->Integer.Value; 188 1.1.1.2.8.2 jruoho } 189 1.1.1.2.8.2 jruoho 190 1.1.1.2.8.2 jruoho ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, 191 1.1.1.2.8.2 jruoho "FieldRead [TO]: Obj %p, Type %X, Buf %p, ByteLen %X\n", 192 1.1.1.2.8.2 jruoho ObjDesc, ObjDesc->Common.Type, Buffer, (UINT32) Length)); 193 1.1.1.2.8.2 jruoho ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, 194 1.1.1.2.8.2 jruoho "FieldRead [FROM]: BitLen %X, BitOff %X, ByteOff %X\n", 195 1.1.1.2.8.2 jruoho ObjDesc->CommonField.BitLength, 196 1.1.1.2.8.2 jruoho ObjDesc->CommonField.StartFieldBitOffset, 197 1.1.1.2.8.2 jruoho ObjDesc->CommonField.BaseByteOffset)); 198 1.1.1.2.8.2 jruoho 199 1.1.1.2.8.2 jruoho /* Lock entire transaction if requested */ 200 1.1.1.2.8.2 jruoho 201 1.1.1.2.8.2 jruoho AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags); 202 1.1.1.2.8.2 jruoho 203 1.1.1.2.8.2 jruoho /* Read from the field */ 204 1.1.1.2.8.2 jruoho 205 1.1.1.2.8.2 jruoho Status = AcpiExExtractFromField (ObjDesc, Buffer, (UINT32) Length); 206 1.1.1.2.8.2 jruoho AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags); 207 1.1.1.2.8.2 jruoho 208 1.1.1.2.8.2 jruoho 209 1.1.1.2.8.2 jruoho Exit: 210 1.1.1.2.8.2 jruoho if (ACPI_FAILURE (Status)) 211 1.1.1.2.8.2 jruoho { 212 1.1.1.2.8.2 jruoho AcpiUtRemoveReference (BufferDesc); 213 1.1.1.2.8.2 jruoho } 214 1.1.1.2.8.2 jruoho else 215 1.1.1.2.8.2 jruoho { 216 1.1.1.2.8.2 jruoho *RetBufferDesc = BufferDesc; 217 1.1.1.2.8.2 jruoho } 218 1.1.1.2.8.2 jruoho 219 1.1.1.2.8.2 jruoho return_ACPI_STATUS (Status); 220 1.1.1.2.8.2 jruoho } 221 1.1.1.2.8.2 jruoho 222 1.1.1.2.8.2 jruoho 223 1.1.1.2.8.2 jruoho /******************************************************************************* 224 1.1.1.2.8.2 jruoho * 225 1.1.1.2.8.2 jruoho * FUNCTION: AcpiExWriteDataToField 226 1.1.1.2.8.2 jruoho * 227 1.1.1.2.8.2 jruoho * PARAMETERS: SourceDesc - Contains data to write 228 1.1.1.2.8.2 jruoho * ObjDesc - The named field 229 1.1.1.2.8.2 jruoho * ResultDesc - Where the return value is returned, if any 230 1.1.1.2.8.2 jruoho * 231 1.1.1.2.8.2 jruoho * RETURN: Status 232 1.1.1.2.8.2 jruoho * 233 1.1.1.2.8.2 jruoho * DESCRIPTION: Write to a named field 234 1.1.1.2.8.2 jruoho * 235 1.1.1.2.8.2 jruoho ******************************************************************************/ 236 1.1.1.2.8.2 jruoho 237 1.1.1.2.8.2 jruoho ACPI_STATUS 238 1.1.1.2.8.2 jruoho AcpiExWriteDataToField ( 239 1.1.1.2.8.2 jruoho ACPI_OPERAND_OBJECT *SourceDesc, 240 1.1.1.2.8.2 jruoho ACPI_OPERAND_OBJECT *ObjDesc, 241 1.1.1.2.8.2 jruoho ACPI_OPERAND_OBJECT **ResultDesc) 242 1.1.1.2.8.2 jruoho { 243 1.1.1.2.8.2 jruoho ACPI_STATUS Status; 244 1.1.1.2.8.2 jruoho UINT32 Length; 245 1.1.1.2.8.2 jruoho void *Buffer; 246 1.1.1.2.8.2 jruoho ACPI_OPERAND_OBJECT *BufferDesc; 247 1.1.1.2.8.2 jruoho UINT32 Function; 248 1.1.1.2.8.2 jruoho 249 1.1.1.2.8.2 jruoho 250 1.1.1.2.8.2 jruoho ACPI_FUNCTION_TRACE_PTR (ExWriteDataToField, ObjDesc); 251 1.1.1.2.8.2 jruoho 252 1.1.1.2.8.2 jruoho 253 1.1.1.2.8.2 jruoho /* Parameter validation */ 254 1.1.1.2.8.2 jruoho 255 1.1.1.2.8.2 jruoho if (!SourceDesc || !ObjDesc) 256 1.1.1.2.8.2 jruoho { 257 1.1.1.2.8.2 jruoho return_ACPI_STATUS (AE_AML_NO_OPERAND); 258 1.1.1.2.8.2 jruoho } 259 1.1.1.2.8.2 jruoho 260 1.1.1.2.8.2 jruoho if (ObjDesc->Common.Type == ACPI_TYPE_BUFFER_FIELD) 261 1.1.1.2.8.2 jruoho { 262 1.1.1.2.8.2 jruoho /* 263 1.1.1.2.8.2 jruoho * If the BufferField arguments have not been previously evaluated, 264 1.1.1.2.8.2 jruoho * evaluate them now and save the results. 265 1.1.1.2.8.2 jruoho */ 266 1.1.1.2.8.2 jruoho if (!(ObjDesc->Common.Flags & AOPOBJ_DATA_VALID)) 267 1.1.1.2.8.2 jruoho { 268 1.1.1.2.8.2 jruoho Status = AcpiDsGetBufferFieldArguments (ObjDesc); 269 1.1.1.2.8.2 jruoho if (ACPI_FAILURE (Status)) 270 1.1.1.2.8.2 jruoho { 271 1.1.1.2.8.2 jruoho return_ACPI_STATUS (Status); 272 1.1.1.2.8.2 jruoho } 273 1.1.1.2.8.2 jruoho } 274 1.1.1.2.8.2 jruoho } 275 1.1.1.2.8.2 jruoho else if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_REGION_FIELD) && 276 1.1.1.2.8.2 jruoho (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_SMBUS || 277 1.1.1.2.8.2 jruoho ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_IPMI)) 278 1.1.1.2.8.2 jruoho { 279 1.1.1.2.8.2 jruoho /* 280 1.1.1.2.8.2 jruoho * This is an SMBus or IPMI write. We will bypass the entire field 281 1.1.1.2.8.2 jruoho * mechanism and handoff the buffer directly to the handler. For 282 1.1.1.2.8.2 jruoho * these address spaces, the buffer is bi-directional; on a write, 283 1.1.1.2.8.2 jruoho * return data is returned in the same buffer. 284 1.1.1.2.8.2 jruoho * 285 1.1.1.2.8.2 jruoho * Source must be a buffer of sufficient size: 286 1.1.1.2.8.2 jruoho * ACPI_SMBUS_BUFFER_SIZE or ACPI_IPMI_BUFFER_SIZE. 287 1.1.1.2.8.2 jruoho * 288 1.1.1.2.8.2 jruoho * Note: SMBus protocol type is passed in upper 16-bits of Function 289 1.1.1.2.8.2 jruoho */ 290 1.1.1.2.8.2 jruoho if (SourceDesc->Common.Type != ACPI_TYPE_BUFFER) 291 1.1.1.2.8.2 jruoho { 292 1.1.1.2.8.2 jruoho ACPI_ERROR ((AE_INFO, 293 1.1.1.2.8.2 jruoho "SMBus or IPMI write requires Buffer, found type %s", 294 1.1.1.2.8.2 jruoho AcpiUtGetObjectTypeName (SourceDesc))); 295 1.1.1.2.8.2 jruoho 296 1.1.1.2.8.2 jruoho return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 297 1.1.1.2.8.2 jruoho } 298 1.1.1.2.8.2 jruoho 299 1.1.1.2.8.2 jruoho if (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_SMBUS) 300 1.1.1.2.8.2 jruoho { 301 1.1.1.2.8.2 jruoho Length = ACPI_SMBUS_BUFFER_SIZE; 302 1.1.1.2.8.2 jruoho Function = ACPI_WRITE | (ObjDesc->Field.Attribute << 16); 303 1.1.1.2.8.2 jruoho } 304 1.1.1.2.8.2 jruoho else /* IPMI */ 305 1.1.1.2.8.2 jruoho { 306 1.1.1.2.8.2 jruoho Length = ACPI_IPMI_BUFFER_SIZE; 307 1.1.1.2.8.2 jruoho Function = ACPI_WRITE; 308 1.1.1.2.8.2 jruoho } 309 1.1.1.2.8.2 jruoho 310 1.1.1.2.8.2 jruoho if (SourceDesc->Buffer.Length < Length) 311 1.1.1.2.8.2 jruoho { 312 1.1.1.2.8.2 jruoho ACPI_ERROR ((AE_INFO, 313 1.1.1.2.8.2 jruoho "SMBus or IPMI write requires Buffer of length %u, found length %u", 314 1.1.1.2.8.2 jruoho Length, SourceDesc->Buffer.Length)); 315 1.1.1.2.8.2 jruoho 316 1.1.1.2.8.2 jruoho return_ACPI_STATUS (AE_AML_BUFFER_LIMIT); 317 1.1.1.2.8.2 jruoho } 318 1.1.1.2.8.2 jruoho 319 1.1.1.2.8.2 jruoho /* Create the bi-directional buffer */ 320 1.1.1.2.8.2 jruoho 321 1.1.1.2.8.2 jruoho BufferDesc = AcpiUtCreateBufferObject (Length); 322 1.1.1.2.8.2 jruoho if (!BufferDesc) 323 1.1.1.2.8.2 jruoho { 324 1.1.1.2.8.2 jruoho return_ACPI_STATUS (AE_NO_MEMORY); 325 1.1.1.2.8.2 jruoho } 326 1.1.1.2.8.2 jruoho 327 1.1.1.2.8.2 jruoho Buffer = BufferDesc->Buffer.Pointer; 328 1.1.1.2.8.2 jruoho ACPI_MEMCPY (Buffer, SourceDesc->Buffer.Pointer, Length); 329 1.1.1.2.8.2 jruoho 330 1.1.1.2.8.2 jruoho /* Lock entire transaction if requested */ 331 1.1.1.2.8.2 jruoho 332 1.1.1.2.8.2 jruoho AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags); 333 1.1.1.2.8.2 jruoho 334 1.1.1.2.8.2 jruoho /* 335 1.1.1.2.8.2 jruoho * Perform the write (returns status and perhaps data in the 336 1.1.1.2.8.2 jruoho * same buffer) 337 1.1.1.2.8.2 jruoho */ 338 1.1.1.2.8.2 jruoho Status = AcpiExAccessRegion (ObjDesc, 0, 339 1.1.1.2.8.2 jruoho (UINT64 *) Buffer, Function); 340 1.1.1.2.8.2 jruoho AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags); 341 1.1.1.2.8.2 jruoho 342 1.1.1.2.8.2 jruoho *ResultDesc = BufferDesc; 343 1.1.1.2.8.2 jruoho return_ACPI_STATUS (Status); 344 1.1.1.2.8.2 jruoho } 345 1.1.1.2.8.2 jruoho 346 1.1.1.2.8.2 jruoho /* Get a pointer to the data to be written */ 347 1.1.1.2.8.2 jruoho 348 1.1.1.2.8.2 jruoho switch (SourceDesc->Common.Type) 349 1.1.1.2.8.2 jruoho { 350 1.1.1.2.8.2 jruoho case ACPI_TYPE_INTEGER: 351 1.1.1.2.8.2 jruoho Buffer = &SourceDesc->Integer.Value; 352 1.1.1.2.8.2 jruoho Length = sizeof (SourceDesc->Integer.Value); 353 1.1.1.2.8.2 jruoho break; 354 1.1.1.2.8.2 jruoho 355 1.1.1.2.8.2 jruoho case ACPI_TYPE_BUFFER: 356 1.1.1.2.8.2 jruoho Buffer = SourceDesc->Buffer.Pointer; 357 1.1.1.2.8.2 jruoho Length = SourceDesc->Buffer.Length; 358 1.1.1.2.8.2 jruoho break; 359 1.1.1.2.8.2 jruoho 360 1.1.1.2.8.2 jruoho case ACPI_TYPE_STRING: 361 1.1.1.2.8.2 jruoho Buffer = SourceDesc->String.Pointer; 362 1.1.1.2.8.2 jruoho Length = SourceDesc->String.Length; 363 1.1.1.2.8.2 jruoho break; 364 1.1.1.2.8.2 jruoho 365 1.1.1.2.8.2 jruoho default: 366 1.1.1.2.8.2 jruoho return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 367 1.1.1.2.8.2 jruoho } 368 1.1.1.2.8.2 jruoho 369 1.1.1.2.8.2 jruoho ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, 370 1.1.1.2.8.2 jruoho "FieldWrite [FROM]: Obj %p (%s:%X), Buf %p, ByteLen %X\n", 371 1.1.1.2.8.2 jruoho SourceDesc, AcpiUtGetTypeName (SourceDesc->Common.Type), 372 1.1.1.2.8.2 jruoho SourceDesc->Common.Type, Buffer, Length)); 373 1.1.1.2.8.2 jruoho 374 1.1.1.2.8.2 jruoho ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, 375 1.1.1.2.8.2 jruoho "FieldWrite [TO]: Obj %p (%s:%X), BitLen %X, BitOff %X, ByteOff %X\n", 376 1.1.1.2.8.2 jruoho ObjDesc, AcpiUtGetTypeName (ObjDesc->Common.Type), 377 1.1.1.2.8.2 jruoho ObjDesc->Common.Type, 378 1.1.1.2.8.2 jruoho ObjDesc->CommonField.BitLength, 379 1.1.1.2.8.2 jruoho ObjDesc->CommonField.StartFieldBitOffset, 380 1.1.1.2.8.2 jruoho ObjDesc->CommonField.BaseByteOffset)); 381 1.1.1.2.8.2 jruoho 382 1.1.1.2.8.2 jruoho /* Lock entire transaction if requested */ 383 1.1.1.2.8.2 jruoho 384 1.1.1.2.8.2 jruoho AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags); 385 1.1.1.2.8.2 jruoho 386 1.1.1.2.8.2 jruoho /* Write to the field */ 387 1.1.1.2.8.2 jruoho 388 1.1.1.2.8.2 jruoho Status = AcpiExInsertIntoField (ObjDesc, Buffer, Length); 389 1.1.1.2.8.2 jruoho AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags); 390 1.1.1.2.8.2 jruoho 391 1.1.1.2.8.2 jruoho return_ACPI_STATUS (Status); 392 1.1.1.2.8.2 jruoho } 393 1.1.1.2.8.2 jruoho 394 1.1.1.2.8.2 jruoho 395
Indexes created Mon Oct 20 20:10:13 GMT 2025