drivers/bus/acpi/dispatcher/dsfield.c

   1 /******************************************************************************
   2  *
   3  * Module Name: dsfield - Dispatcher field routines
   4  *              $Revision$
   5  *
   6  *****************************************************************************/
   7
   8 /*
   9  *  Copyright (C) 2000, 2001 R. Byron Moore
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License as published by
  13  *  the Free Software Foundation; either version 2 of the License, or
  14  *  (at your option) any later version.
  15  *
  16  *  This program is distributed in the hope that it will be useful,
  17  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *  GNU General Public License for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License
  22  *  along with this program; if not, write to the Free Software
  23  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  24  */
  25
  26
  27 #include "acpi.h"
  28 #include "amlcode.h"
  29 #include "acdispat.h"
  30 #include "acinterp.h"
  31 #include "acnamesp.h"
  32
  33
  34 #define _COMPONENT          ACPI_DISPATCHER
  35          MODULE_NAME         ("dsfield")
  36
  37
  38 /*
  39  * Field flags: Bits 00 - 03 : Access_type (Any_acc, Byte_acc, etc.)
  40  *                   04      : Lock_rule (1 == Lock)
  41  *                   05 - 06 : Update_rule
  42  */
  43
  44 #define FIELD_ACCESS_TYPE_MASK      0x0F
  45 #define FIELD_LOCK_RULE_MASK        0x10
  46 #define FIELD_UPDATE_RULE_MASK      0x60
  47
  48
  49 /*******************************************************************************
  50  *
  51  * FUNCTION:    Acpi_ds_create_field
  52  *
  53  * PARAMETERS:  Op              - Op containing the Field definition and args
  54  *              Region_node - Object for the containing Operation Region
  55  *
  56  * RETURN:      Status
  57  *
  58  * DESCRIPTION: Create a new field in the specified operation region
  59  *
  60  ******************************************************************************/
  61
  62 ACPI_STATUS
  63 acpi_ds_create_field (
  64         ACPI_PARSE_OBJECT       *op,
  65         ACPI_NAMESPACE_NODE     *region_node,
  66         ACPI_WALK_STATE         *walk_state)
  67 {
  68         ACPI_STATUS             status = AE_AML_ERROR;
  69         ACPI_PARSE_OBJECT       *arg;
  70         ACPI_NAMESPACE_NODE     *node;
  71         u8                      field_flags;
  72         u8                      access_attribute = 0;
  73         u32                     field_bit_position = 0;
  74
  75
  76         /* First arg is the name of the parent Op_region */
  77
  78         arg = op->value.arg;
  79         if (!region_node) {
  80                 status = acpi_ns_lookup (walk_state->scope_info, arg->value.name,
  81                                  ACPI_TYPE_REGION, IMODE_EXECUTE,
  82                                  NS_SEARCH_PARENT, walk_state,
  83                                  &region_node);
  84
  85                 if (ACPI_FAILURE (status)) {
  86                         return (status);
  87                 }
  88         }
  89
  90         /* Second arg is the field flags */
  91
  92         arg = arg->next;
  93         field_flags = (u8) arg->value.integer;
  94
  95         /* Each remaining arg is a Named Field */
  96
  97         arg = arg->next;
  98         while (arg) {
  99                 switch (arg->opcode) {
 100                 case AML_RESERVEDFIELD_OP:
 101
 102                         field_bit_position += arg->value.size;
 103                         break;
 104
 105
 106                 case AML_ACCESSFIELD_OP:
 107
 108                         /*
 109                          * Get a new Access_type and Access_attribute for all
 110                          * entries (until end or another Access_as keyword)
 111                          */
 112
 113                         access_attribute = (u8) arg->value.integer;
 114                         field_flags     = (u8)
 115                                           ((field_flags & FIELD_ACCESS_TYPE_MASK) ||
 116                                           ((u8) (arg->value.integer >> 8)));
 117                         break;
 118
 119
 120                 case AML_NAMEDFIELD_OP:
 121
 122                         status = acpi_ns_lookup (walk_state->scope_info,
 123                                           (NATIVE_CHAR *) &((ACPI_PARSE2_OBJECT *)arg)->name,
 124                                           INTERNAL_TYPE_DEF_FIELD,
 125                                           IMODE_LOAD_PASS1,
 126                                           NS_NO_UPSEARCH | NS_DONT_OPEN_SCOPE,
 127                                           NULL, &node);
 128
 129                         if (ACPI_FAILURE (status)) {
 130                                 return (status);
 131                         }
 132
 133                         /*
 134                          * Initialize an object for the new Node that is on
 135                          * the object stack
 136                          */
 137
 138                         status = acpi_aml_prep_def_field_value (node, region_node, field_flags,
 139                                           access_attribute, field_bit_position, arg->value.size);
 140
 141                         if (ACPI_FAILURE (status)) {
 142                                 return (status);
 143                         }
 144
 145                         /* Keep track of bit position for *next* field */
 146
 147                         field_bit_position += arg->value.size;
 148                         break;
 149                 }
 150
 151                 arg = arg->next;
 152         }
 153
 154         return (status);
 155 }
 156
 157
 158 /*******************************************************************************
 159  *
 160  * FUNCTION:    Acpi_ds_create_bank_field
 161  *
 162  * PARAMETERS:  Op              - Op containing the Field definition and args
 163  *              Region_node - Object for the containing Operation Region
 164  *
 165  * RETURN:      Status
 166  *
 167  * DESCRIPTION: Create a new bank field in the specified operation region
 168  *
 169  ******************************************************************************/
 170
 171 ACPI_STATUS
 172 acpi_ds_create_bank_field (
 173         ACPI_PARSE_OBJECT       *op,
 174         ACPI_NAMESPACE_NODE     *region_node,
 175         ACPI_WALK_STATE         *walk_state)
 176 {
 177         ACPI_STATUS             status = AE_AML_ERROR;
 178         ACPI_PARSE_OBJECT       *arg;
 179         ACPI_NAMESPACE_NODE     *register_node;
 180         ACPI_NAMESPACE_NODE     *node;
 181         u32                     bank_value;
 182         u8                      field_flags;
 183         u8                      access_attribute = 0;
 184         u32                     field_bit_position = 0;
 185
 186
 187         /* First arg is the name of the parent Op_region */
 188
 189         arg = op->value.arg;
 190         if (!region_node) {
 191                 status = acpi_ns_lookup (walk_state->scope_info, arg->value.name,
 192                                  ACPI_TYPE_REGION, IMODE_EXECUTE,
 193                                  NS_SEARCH_PARENT, walk_state,
 194                                  &region_node);
 195
 196                 if (ACPI_FAILURE (status)) {
 197                         return (status);
 198                 }
 199         }
 200
 201         /* Second arg is the Bank Register */
 202
 203         arg = arg->next;
 204
 205         status = acpi_ns_lookup (walk_state->scope_info, arg->value.string,
 206                          INTERNAL_TYPE_BANK_FIELD_DEFN,
 207                          IMODE_LOAD_PASS1,
 208                          NS_NO_UPSEARCH | NS_DONT_OPEN_SCOPE,
 209                          NULL, &register_node);
 210
 211         if (ACPI_FAILURE (status)) {
 212                 return (status);
 213         }
 214
 215         /* Third arg is the Bank_value */
 216
 217         arg = arg->next;
 218         bank_value = arg->value.integer;
 219
 220
 221         /* Next arg is the field flags */
 222
 223         arg = arg->next;
 224         field_flags = (u8) arg->value.integer;
 225
 226         /* Each remaining arg is a Named Field */
 227
 228         arg = arg->next;
 229         while (arg) {
 230                 switch (arg->opcode) {
 231                 case AML_RESERVEDFIELD_OP:
 232
 233                         field_bit_position += arg->value.size;
 234                         break;
 235
 236
 237                 case AML_ACCESSFIELD_OP:
 238
 239                         /*
 240                          * Get a new Access_type and Access_attribute for
 241                          * all entries (until end or another Access_as keyword)
 242                          */
 243
 244                         access_attribute = (u8) arg->value.integer;
 245                         field_flags     = (u8)
 246                                           ((field_flags & FIELD_ACCESS_TYPE_MASK) ||
 247                                           ((u8) (arg->value.integer >> 8)));
 248                         break;
 249
 250
 251                 case AML_NAMEDFIELD_OP:
 252
 253                         status = acpi_ns_lookup (walk_state->scope_info,
 254                                           (NATIVE_CHAR *) &((ACPI_PARSE2_OBJECT *)arg)->name,
 255                                           INTERNAL_TYPE_DEF_FIELD,
 256                                           IMODE_LOAD_PASS1,
 257                                           NS_NO_UPSEARCH | NS_DONT_OPEN_SCOPE,
 258                                           NULL, &node);
 259
 260                         if (ACPI_FAILURE (status)) {
 261                                 return (status);
 262                         }
 263
 264                         /*
 265                          * Initialize an object for the new Node that is on
 266                          * the object stack
 267                          */
 268
 269                         status = acpi_aml_prep_bank_field_value (node, region_node, register_node,
 270                                           bank_value, field_flags, access_attribute,
 271                                           field_bit_position, arg->value.size);
 272
 273                         if (ACPI_FAILURE (status)) {
 274                                 return (status);
 275                         }
 276
 277                         /* Keep track of bit position for the *next* field */
 278
 279                         field_bit_position += arg->value.size;
 280                         break;
 281
 282                 }
 283
 284                 arg = arg->next;
 285         }
 286
 287         return (status);
 288 }
 289
 290
 291 /*******************************************************************************
 292  *
 293  * FUNCTION:    Acpi_ds_create_index_field
 294  *
 295  * PARAMETERS:  Op              - Op containing the Field definition and args
 296  *              Region_node - Object for the containing Operation Region
 297  *
 298  * RETURN:      Status
 299  *
 300  * DESCRIPTION: Create a new index field in the specified operation region
 301  *
 302  ******************************************************************************/
 303
 304 ACPI_STATUS
 305 acpi_ds_create_index_field (
 306         ACPI_PARSE_OBJECT       *op,
 307         ACPI_HANDLE             region_node,
 308         ACPI_WALK_STATE         *walk_state)
 309 {
 310         ACPI_STATUS             status;
 311         ACPI_PARSE_OBJECT       *arg;
 312         ACPI_NAMESPACE_NODE     *node;
 313         ACPI_NAMESPACE_NODE     *index_register_node;
 314         ACPI_NAMESPACE_NODE     *data_register_node;
 315         u8                      field_flags;
 316         u8                      access_attribute = 0;
 317         u32                     field_bit_position = 0;
 318
 319
 320         arg = op->value.arg;
 321
 322         /* First arg is the name of the Index register */
 323
 324         status = acpi_ns_lookup (walk_state->scope_info, arg->value.string,
 325                          ACPI_TYPE_ANY, IMODE_LOAD_PASS1,
 326                          NS_NO_UPSEARCH | NS_DONT_OPEN_SCOPE,
 327                          NULL, &index_register_node);
 328
 329         if (ACPI_FAILURE (status)) {
 330                 return (status);
 331         }
 332
 333         /* Second arg is the data register */
 334
 335         arg = arg->next;
 336
 337         status = acpi_ns_lookup (walk_state->scope_info, arg->value.string,
 338                          INTERNAL_TYPE_INDEX_FIELD_DEFN,
 339                          IMODE_LOAD_PASS1,
 340                          NS_NO_UPSEARCH | NS_DONT_OPEN_SCOPE,
 341                          NULL, &data_register_node);
 342
 343         if (ACPI_FAILURE (status)) {
 344                 return (status);
 345         }
 346
 347
 348         /* Next arg is the field flags */
 349
 350         arg = arg->next;
 351         field_flags = (u8) arg->value.integer;
 352
 353
 354         /* Each remaining arg is a Named Field */
 355
 356         arg = arg->next;
 357         while (arg) {
 358                 switch (arg->opcode) {
 359                 case AML_RESERVEDFIELD_OP:
 360
 361                         field_bit_position += arg->value.size;
 362                         break;
 363
 364
 365                 case AML_ACCESSFIELD_OP:
 366
 367                         /*
 368                          * Get a new Access_type and Access_attribute for all
 369                          * entries (until end or another Access_as keyword)
 370                          */
 371
 372                         access_attribute = (u8) arg->value.integer;
 373                         field_flags     = (u8)
 374                                            ((field_flags & FIELD_ACCESS_TYPE_MASK) ||
 375                                            ((u8) (arg->value.integer >> 8)));
 376                         break;
 377
 378
 379                 case AML_NAMEDFIELD_OP:
 380
 381                         status = acpi_ns_lookup (walk_state->scope_info,
 382                                          (NATIVE_CHAR *) &((ACPI_PARSE2_OBJECT *)arg)->name,
 383                                          INTERNAL_TYPE_INDEX_FIELD,
 384                                          IMODE_LOAD_PASS1,
 385                                          NS_NO_UPSEARCH | NS_DONT_OPEN_SCOPE,
 386                                          NULL, &node);
 387
 388                         if (ACPI_FAILURE (status)) {
 389                                 return (status);
 390                         }
 391
 392                         /*
 393                          * Initialize an object for the new Node that is on
 394                          * the object stack
 395                          */
 396
 397                         status = acpi_aml_prep_index_field_value (node, index_register_node, data_register_node,
 398                                           field_flags, access_attribute,
 399                                           field_bit_position, arg->value.size);
 400
 401                         if (ACPI_FAILURE (status)) {
 402                                 return (status);
 403                         }
 404
 405                         /* Keep track of bit position for the *next* field */
 406
 407                         field_bit_position += arg->value.size;
 408                         break;
 409
 410
 411                 default:
 412
 413                         status = AE_AML_ERROR;
 414                         break;
 415                 }
 416
 417                 arg = arg->next;
 418         }
 419
 420         return (status);
 421 }
 422
 423