Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: dsfield - Dispatcher field routines |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
Bob Moore | 6c9deb7 | 2007-02-02 19:48:24 +0300 | [diff] [blame] | 8 | * Copyright (C) 2000 - 2007, R. Byron Moore |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <acpi/acpi.h> |
| 45 | #include <acpi/amlcode.h> |
| 46 | #include <acpi/acdispat.h> |
| 47 | #include <acpi/acinterp.h> |
| 48 | #include <acpi/acnamesp.h> |
| 49 | #include <acpi/acparser.h> |
| 50 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #define _COMPONENT ACPI_DISPATCHER |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 52 | ACPI_MODULE_NAME("dsfield") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 54 | /* Local prototypes */ |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 55 | static acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 56 | acpi_ds_get_field_names(struct acpi_create_field_info *info, |
| 57 | struct acpi_walk_state *walk_state, |
| 58 | union acpi_parse_object *arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
| 60 | /******************************************************************************* |
| 61 | * |
| 62 | * FUNCTION: acpi_ds_create_buffer_field |
| 63 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 64 | * PARAMETERS: Op - Current parse op (create_xXField) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | * walk_state - Current state |
| 66 | * |
| 67 | * RETURN: Status |
| 68 | * |
| 69 | * DESCRIPTION: Execute the create_field operators: |
| 70 | * create_bit_field_op, |
| 71 | * create_byte_field_op, |
| 72 | * create_word_field_op, |
| 73 | * create_dword_field_op, |
| 74 | * create_qword_field_op, |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 75 | * create_field_op (all of which define a field in a buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | * |
| 77 | ******************************************************************************/ |
| 78 | |
| 79 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 80 | acpi_ds_create_buffer_field(union acpi_parse_object *op, |
| 81 | struct acpi_walk_state *walk_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 83 | union acpi_parse_object *arg; |
| 84 | struct acpi_namespace_node *node; |
| 85 | acpi_status status; |
| 86 | union acpi_operand_object *obj_desc; |
| 87 | union acpi_operand_object *second_desc = NULL; |
| 88 | u32 flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 90 | ACPI_FUNCTION_TRACE(ds_create_buffer_field); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
| 92 | /* Get the name_string argument */ |
| 93 | |
| 94 | if (op->common.aml_opcode == AML_CREATE_FIELD_OP) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 95 | arg = acpi_ps_get_arg(op, 3); |
| 96 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | /* Create Bit/Byte/Word/Dword field */ |
| 98 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 99 | arg = acpi_ps_get_arg(op, 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | } |
| 101 | |
| 102 | if (!arg) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 103 | return_ACPI_STATUS(AE_AML_NO_OPERAND); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | } |
| 105 | |
| 106 | if (walk_state->deferred_node) { |
| 107 | node = walk_state->deferred_node; |
| 108 | status = AE_OK; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 109 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | /* |
| 111 | * During the load phase, we want to enter the name of the field into |
| 112 | * the namespace. During the execute phase (when we evaluate the size |
| 113 | * operand), we want to lookup the name |
| 114 | */ |
| 115 | if (walk_state->parse_flags & ACPI_PARSE_EXECUTE) { |
| 116 | flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 117 | } else { |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 118 | flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 119 | ACPI_NS_ERROR_IF_FOUND; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | } |
| 121 | |
| 122 | /* |
| 123 | * Enter the name_string into the namespace |
| 124 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 125 | status = |
| 126 | acpi_ns_lookup(walk_state->scope_info, |
| 127 | arg->common.value.string, ACPI_TYPE_ANY, |
| 128 | ACPI_IMODE_LOAD_PASS1, flags, walk_state, |
| 129 | &(node)); |
| 130 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 131 | ACPI_ERROR_NAMESPACE(arg->common.value.string, status); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 132 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | } |
| 134 | } |
| 135 | |
Bob Moore | 9c52657 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 136 | /* |
| 137 | * We could put the returned object (Node) on the object stack for later, |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 138 | * but for now, we will put it in the "op" object that the parser uses, |
| 139 | * so we can get it again at the end of this scope |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | */ |
| 141 | op->common.node = node; |
| 142 | |
| 143 | /* |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 144 | * If there is no object attached to the node, this node was just created |
| 145 | * and we need to create the field object. Otherwise, this was a lookup |
| 146 | * of an existing node and we don't want to create the field object again. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 148 | obj_desc = acpi_ns_get_attached_object(node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | if (obj_desc) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 150 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | } |
| 152 | |
| 153 | /* |
| 154 | * The Field definition is not fully parsed at this time. |
| 155 | * (We must save the address of the AML for the buffer and index operands) |
| 156 | */ |
| 157 | |
| 158 | /* Create the buffer field object */ |
| 159 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 160 | obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER_FIELD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | if (!obj_desc) { |
| 162 | status = AE_NO_MEMORY; |
| 163 | goto cleanup; |
| 164 | } |
| 165 | |
| 166 | /* |
| 167 | * Remember location in AML stream of the field unit |
| 168 | * opcode and operands -- since the buffer and index |
| 169 | * operands must be evaluated. |
| 170 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 171 | second_desc = obj_desc->common.next_object; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | second_desc->extra.aml_start = op->named.data; |
| 173 | second_desc->extra.aml_length = op->named.length; |
| 174 | obj_desc->buffer_field.node = node; |
| 175 | |
| 176 | /* Attach constructed field descriptors to parent node */ |
| 177 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 178 | status = acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_BUFFER_FIELD); |
| 179 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | goto cleanup; |
| 181 | } |
| 182 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 183 | cleanup: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | |
| 185 | /* Remove local reference to the object */ |
| 186 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 187 | acpi_ut_remove_reference(obj_desc); |
| 188 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | } |
| 190 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | /******************************************************************************* |
| 192 | * |
| 193 | * FUNCTION: acpi_ds_get_field_names |
| 194 | * |
| 195 | * PARAMETERS: Info - create_field info structure |
| 196 | * ` walk_state - Current method state |
| 197 | * Arg - First parser arg for the field name list |
| 198 | * |
| 199 | * RETURN: Status |
| 200 | * |
| 201 | * DESCRIPTION: Process all named fields in a field declaration. Names are |
| 202 | * entered into the namespace. |
| 203 | * |
| 204 | ******************************************************************************/ |
| 205 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 206 | static acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 207 | acpi_ds_get_field_names(struct acpi_create_field_info *info, |
| 208 | struct acpi_walk_state *walk_state, |
| 209 | union acpi_parse_object *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 211 | acpi_status status; |
| 212 | acpi_integer position; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 214 | ACPI_FUNCTION_TRACE_PTR(ds_get_field_names, info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | |
| 216 | /* First field starts at bit zero */ |
| 217 | |
| 218 | info->field_bit_position = 0; |
| 219 | |
| 220 | /* Process all elements in the field list (of parse nodes) */ |
| 221 | |
| 222 | while (arg) { |
| 223 | /* |
| 224 | * Three types of field elements are handled: |
| 225 | * 1) Offset - specifies a bit offset |
| 226 | * 2) access_as - changes the access mode |
| 227 | * 3) Name - Enters a new named field into the namespace |
| 228 | */ |
| 229 | switch (arg->common.aml_opcode) { |
| 230 | case AML_INT_RESERVEDFIELD_OP: |
| 231 | |
| 232 | position = (acpi_integer) info->field_bit_position |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 233 | + (acpi_integer) arg->common.value.size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | |
| 235 | if (position > ACPI_UINT32_MAX) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 236 | ACPI_ERROR((AE_INFO, |
| 237 | "Bit offset within field too large (> 0xFFFFFFFF)")); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 238 | return_ACPI_STATUS(AE_SUPPORT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | } |
| 240 | |
| 241 | info->field_bit_position = (u32) position; |
| 242 | break; |
| 243 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | case AML_INT_ACCESSFIELD_OP: |
| 245 | |
| 246 | /* |
| 247 | * Get a new access_type and access_attribute -- to be used for all |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 248 | * field units that follow, until field end or another access_as |
| 249 | * keyword. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 251 | * In field_flags, preserve the flag bits other than the |
| 252 | * ACCESS_TYPE bits |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | */ |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 254 | info->field_flags = (u8) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 255 | ((info-> |
| 256 | field_flags & ~(AML_FIELD_ACCESS_TYPE_MASK)) | |
| 257 | ((u8) ((u32) arg->common.value.integer >> 8))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | |
| 259 | info->attribute = (u8) (arg->common.value.integer); |
| 260 | break; |
| 261 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | case AML_INT_NAMEDFIELD_OP: |
| 263 | |
| 264 | /* Lookup the name */ |
| 265 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 266 | status = acpi_ns_lookup(walk_state->scope_info, |
| 267 | (char *)&arg->named.name, |
| 268 | info->field_type, |
| 269 | ACPI_IMODE_EXECUTE, |
| 270 | ACPI_NS_DONT_OPEN_SCOPE, |
| 271 | walk_state, &info->field_node); |
| 272 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 273 | ACPI_ERROR_NAMESPACE((char *)&arg->named.name, |
| 274 | status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | if (status != AE_ALREADY_EXISTS) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 276 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | } |
| 278 | |
| 279 | /* Already exists, ignore error */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 280 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | arg->common.node = info->field_node; |
| 282 | info->field_bit_length = arg->common.value.size; |
| 283 | |
Lin Ming | ef805d9 | 2008-04-10 19:06:41 +0400 | [diff] [blame^] | 284 | /* |
| 285 | * If there is no object attached to the node, this node was just created |
| 286 | * and we need to create the field object. Otherwise, this was a lookup |
| 287 | * of an existing node and we don't want to create the field object again. |
| 288 | */ |
| 289 | if (!acpi_ns_get_attached_object |
| 290 | (info->field_node)) { |
| 291 | status = acpi_ex_prep_field_value(info); |
| 292 | if (ACPI_FAILURE(status)) { |
| 293 | return_ACPI_STATUS(status); |
| 294 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | } |
| 296 | } |
| 297 | |
| 298 | /* Keep track of bit position for the next field */ |
| 299 | |
| 300 | position = (acpi_integer) info->field_bit_position |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 301 | + (acpi_integer) arg->common.value.size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | |
| 303 | if (position > ACPI_UINT32_MAX) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 304 | ACPI_ERROR((AE_INFO, |
| 305 | "Field [%4.4s] bit offset too large (> 0xFFFFFFFF)", |
| 306 | ACPI_CAST_PTR(char, |
| 307 | &info->field_node-> |
| 308 | name))); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 309 | return_ACPI_STATUS(AE_SUPPORT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | } |
| 311 | |
| 312 | info->field_bit_position += info->field_bit_length; |
| 313 | break; |
| 314 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | default: |
| 316 | |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 317 | ACPI_ERROR((AE_INFO, |
| 318 | "Invalid opcode in field list: %X", |
| 319 | arg->common.aml_opcode)); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 320 | return_ACPI_STATUS(AE_AML_BAD_OPCODE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | } |
| 322 | |
| 323 | arg = arg->common.next; |
| 324 | } |
| 325 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 326 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | } |
| 328 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | /******************************************************************************* |
| 330 | * |
| 331 | * FUNCTION: acpi_ds_create_field |
| 332 | * |
| 333 | * PARAMETERS: Op - Op containing the Field definition and args |
| 334 | * region_node - Object for the containing Operation Region |
| 335 | * ` walk_state - Current method state |
| 336 | * |
| 337 | * RETURN: Status |
| 338 | * |
| 339 | * DESCRIPTION: Create a new field in the specified operation region |
| 340 | * |
| 341 | ******************************************************************************/ |
| 342 | |
| 343 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 344 | acpi_ds_create_field(union acpi_parse_object *op, |
| 345 | struct acpi_namespace_node *region_node, |
| 346 | struct acpi_walk_state *walk_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 348 | acpi_status status; |
| 349 | union acpi_parse_object *arg; |
| 350 | struct acpi_create_field_info info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 352 | ACPI_FUNCTION_TRACE_PTR(ds_create_field, op); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | |
| 354 | /* First arg is the name of the parent op_region (must already exist) */ |
| 355 | |
| 356 | arg = op->common.value.arg; |
| 357 | if (!region_node) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 358 | status = |
| 359 | acpi_ns_lookup(walk_state->scope_info, |
| 360 | arg->common.value.name, ACPI_TYPE_REGION, |
| 361 | ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, |
| 362 | walk_state, ®ion_node); |
| 363 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 364 | ACPI_ERROR_NAMESPACE(arg->common.value.name, status); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 365 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | } |
| 367 | } |
| 368 | |
| 369 | /* Second arg is the field flags */ |
| 370 | |
| 371 | arg = arg->common.next; |
| 372 | info.field_flags = (u8) arg->common.value.integer; |
| 373 | info.attribute = 0; |
| 374 | |
| 375 | /* Each remaining arg is a Named Field */ |
| 376 | |
| 377 | info.field_type = ACPI_TYPE_LOCAL_REGION_FIELD; |
| 378 | info.region_node = region_node; |
| 379 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 380 | status = acpi_ds_get_field_names(&info, walk_state, arg->common.next); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 382 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | } |
| 384 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | /******************************************************************************* |
| 386 | * |
| 387 | * FUNCTION: acpi_ds_init_field_objects |
| 388 | * |
| 389 | * PARAMETERS: Op - Op containing the Field definition and args |
| 390 | * ` walk_state - Current method state |
| 391 | * |
| 392 | * RETURN: Status |
| 393 | * |
| 394 | * DESCRIPTION: For each "Field Unit" name in the argument list that is |
| 395 | * part of the field declaration, enter the name into the |
| 396 | * namespace. |
| 397 | * |
| 398 | ******************************************************************************/ |
| 399 | |
| 400 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 401 | acpi_ds_init_field_objects(union acpi_parse_object *op, |
| 402 | struct acpi_walk_state *walk_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 404 | acpi_status status; |
| 405 | union acpi_parse_object *arg = NULL; |
| 406 | struct acpi_namespace_node *node; |
| 407 | u8 type = 0; |
Lin Ming | ef805d9 | 2008-04-10 19:06:41 +0400 | [diff] [blame^] | 408 | u32 flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 410 | ACPI_FUNCTION_TRACE_PTR(ds_init_field_objects, op); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | |
Lin Ming | ef805d9 | 2008-04-10 19:06:41 +0400 | [diff] [blame^] | 412 | /* |
| 413 | * During the load phase, we want to enter the name of the field into |
| 414 | * the namespace. During the execute phase (when we evaluate the bank_value |
| 415 | * operand), we want to lookup the name. |
| 416 | */ |
| 417 | if (walk_state->deferred_node) { |
| 418 | flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE; |
| 419 | } else { |
| 420 | flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | |
| 421 | ACPI_NS_ERROR_IF_FOUND; |
| 422 | } |
| 423 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | switch (walk_state->opcode) { |
| 425 | case AML_FIELD_OP: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 426 | arg = acpi_ps_get_arg(op, 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | type = ACPI_TYPE_LOCAL_REGION_FIELD; |
| 428 | break; |
| 429 | |
| 430 | case AML_BANK_FIELD_OP: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 431 | arg = acpi_ps_get_arg(op, 4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | type = ACPI_TYPE_LOCAL_BANK_FIELD; |
| 433 | break; |
| 434 | |
| 435 | case AML_INDEX_FIELD_OP: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 436 | arg = acpi_ps_get_arg(op, 3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | type = ACPI_TYPE_LOCAL_INDEX_FIELD; |
| 438 | break; |
| 439 | |
| 440 | default: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 441 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | } |
| 443 | |
| 444 | /* |
| 445 | * Walk the list of entries in the field_list |
| 446 | */ |
| 447 | while (arg) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 448 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | /* Ignore OFFSET and ACCESSAS terms here */ |
| 450 | |
| 451 | if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 452 | status = acpi_ns_lookup(walk_state->scope_info, |
| 453 | (char *)&arg->named.name, |
| 454 | type, ACPI_IMODE_LOAD_PASS1, |
Lin Ming | ef805d9 | 2008-04-10 19:06:41 +0400 | [diff] [blame^] | 455 | flags, walk_state, &node); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 456 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 457 | ACPI_ERROR_NAMESPACE((char *)&arg->named.name, |
| 458 | status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | if (status != AE_ALREADY_EXISTS) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 460 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | } |
| 462 | |
| 463 | /* Name already exists, just ignore this error */ |
| 464 | |
| 465 | status = AE_OK; |
| 466 | } |
| 467 | |
| 468 | arg->common.node = node; |
| 469 | } |
| 470 | |
| 471 | /* Move to next field in the list */ |
| 472 | |
| 473 | arg = arg->common.next; |
| 474 | } |
| 475 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 476 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | } |
| 478 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | /******************************************************************************* |
| 480 | * |
| 481 | * FUNCTION: acpi_ds_create_bank_field |
| 482 | * |
| 483 | * PARAMETERS: Op - Op containing the Field definition and args |
| 484 | * region_node - Object for the containing Operation Region |
Lin Ming | ef805d9 | 2008-04-10 19:06:41 +0400 | [diff] [blame^] | 485 | * walk_state - Current method state |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | * |
| 487 | * RETURN: Status |
| 488 | * |
| 489 | * DESCRIPTION: Create a new bank field in the specified operation region |
| 490 | * |
| 491 | ******************************************************************************/ |
| 492 | |
| 493 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 494 | acpi_ds_create_bank_field(union acpi_parse_object *op, |
| 495 | struct acpi_namespace_node *region_node, |
| 496 | struct acpi_walk_state *walk_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 498 | acpi_status status; |
| 499 | union acpi_parse_object *arg; |
| 500 | struct acpi_create_field_info info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 502 | ACPI_FUNCTION_TRACE_PTR(ds_create_bank_field, op); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | |
| 504 | /* First arg is the name of the parent op_region (must already exist) */ |
| 505 | |
| 506 | arg = op->common.value.arg; |
| 507 | if (!region_node) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 508 | status = |
| 509 | acpi_ns_lookup(walk_state->scope_info, |
| 510 | arg->common.value.name, ACPI_TYPE_REGION, |
| 511 | ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, |
| 512 | walk_state, ®ion_node); |
| 513 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 514 | ACPI_ERROR_NAMESPACE(arg->common.value.name, status); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 515 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | } |
| 517 | } |
| 518 | |
| 519 | /* Second arg is the Bank Register (Field) (must already exist) */ |
| 520 | |
| 521 | arg = arg->common.next; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 522 | status = |
| 523 | acpi_ns_lookup(walk_state->scope_info, arg->common.value.string, |
| 524 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, |
| 525 | ACPI_NS_SEARCH_PARENT, walk_state, |
| 526 | &info.register_node); |
| 527 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 528 | ACPI_ERROR_NAMESPACE(arg->common.value.string, status); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 529 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | } |
| 531 | |
Lin Ming | ef805d9 | 2008-04-10 19:06:41 +0400 | [diff] [blame^] | 532 | /* |
| 533 | * Third arg is the bank_value |
| 534 | * This arg is a term_arg, not a constant |
| 535 | * It will be evaluated later, by acpi_ds_eval_bank_field_operands |
| 536 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | arg = arg->common.next; |
Bob Moore | 9c52657 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 538 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | /* Fourth arg is the field flags */ |
| 540 | |
| 541 | arg = arg->common.next; |
| 542 | info.field_flags = (u8) arg->common.value.integer; |
| 543 | |
| 544 | /* Each remaining arg is a Named Field */ |
| 545 | |
| 546 | info.field_type = ACPI_TYPE_LOCAL_BANK_FIELD; |
| 547 | info.region_node = region_node; |
| 548 | |
Lin Ming | ef805d9 | 2008-04-10 19:06:41 +0400 | [diff] [blame^] | 549 | /* |
| 550 | * Use Info.data_register_node to store bank_field Op |
| 551 | * It's safe because data_register_node will never be used when create bank field |
| 552 | * We store aml_start and aml_length in the bank_field Op for late evaluation |
| 553 | * Used in acpi_ex_prep_field_value(Info) |
| 554 | * |
| 555 | * TBD: Or, should we add a field in struct acpi_create_field_info, like "void *ParentOp"? |
| 556 | */ |
| 557 | info.data_register_node = (struct acpi_namespace_node *)op; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | |
Lin Ming | ef805d9 | 2008-04-10 19:06:41 +0400 | [diff] [blame^] | 559 | status = acpi_ds_get_field_names(&info, walk_state, arg->common.next); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 560 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | } |
| 562 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | /******************************************************************************* |
| 564 | * |
| 565 | * FUNCTION: acpi_ds_create_index_field |
| 566 | * |
| 567 | * PARAMETERS: Op - Op containing the Field definition and args |
| 568 | * region_node - Object for the containing Operation Region |
| 569 | * ` walk_state - Current method state |
| 570 | * |
| 571 | * RETURN: Status |
| 572 | * |
| 573 | * DESCRIPTION: Create a new index field in the specified operation region |
| 574 | * |
| 575 | ******************************************************************************/ |
| 576 | |
| 577 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 578 | acpi_ds_create_index_field(union acpi_parse_object *op, |
| 579 | struct acpi_namespace_node *region_node, |
| 580 | struct acpi_walk_state *walk_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 582 | acpi_status status; |
| 583 | union acpi_parse_object *arg; |
| 584 | struct acpi_create_field_info info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 586 | ACPI_FUNCTION_TRACE_PTR(ds_create_index_field, op); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | |
| 588 | /* First arg is the name of the Index register (must already exist) */ |
| 589 | |
| 590 | arg = op->common.value.arg; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 591 | status = |
| 592 | acpi_ns_lookup(walk_state->scope_info, arg->common.value.string, |
| 593 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, |
| 594 | ACPI_NS_SEARCH_PARENT, walk_state, |
| 595 | &info.register_node); |
| 596 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 597 | ACPI_ERROR_NAMESPACE(arg->common.value.string, status); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 598 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | } |
| 600 | |
| 601 | /* Second arg is the data register (must already exist) */ |
| 602 | |
| 603 | arg = arg->common.next; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 604 | status = |
| 605 | acpi_ns_lookup(walk_state->scope_info, arg->common.value.string, |
| 606 | ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, |
| 607 | ACPI_NS_SEARCH_PARENT, walk_state, |
| 608 | &info.data_register_node); |
| 609 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 610 | ACPI_ERROR_NAMESPACE(arg->common.value.string, status); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 611 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | } |
| 613 | |
| 614 | /* Next arg is the field flags */ |
| 615 | |
| 616 | arg = arg->common.next; |
| 617 | info.field_flags = (u8) arg->common.value.integer; |
| 618 | |
| 619 | /* Each remaining arg is a Named Field */ |
| 620 | |
| 621 | info.field_type = ACPI_TYPE_LOCAL_INDEX_FIELD; |
| 622 | info.region_node = region_node; |
| 623 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 624 | status = acpi_ds_get_field_names(&info, walk_state, arg->common.next); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 626 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | } |