drivers/bus/acpi/resource/rslist.c

   1 /*******************************************************************************
   2  *
   3  * Module Name: rslist - Acpi_rs_byte_stream_to_list
   4  *                       Acpi_list_to_byte_stream
   5  *              $Revision$
   6  *
   7  ******************************************************************************/
   8
   9 /*
  10  *  Copyright (C) 2000, 2001 R. Byron Moore
  11  *
  12  *  This program is free software; you can redistribute it and/or modify
  13  *  it under the terms of the GNU General Public License as published by
  14  *  the Free Software Foundation; either version 2 of the License, or
  15  *  (at your option) any later version.
  16  *
  17  *  This program is distributed in the hope that it will be useful,
  18  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *  GNU General Public License for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License
  23  *  along with this program; if not, write to the Free Software
  24  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  25  */
  26
  27
  28 #include "acpi.h"
  29 #include "acresrc.h"
  30
  31 #define _COMPONENT          ACPI_RESOURCES
  32          MODULE_NAME         ("rslist")
  33
  34
  35 /*******************************************************************************
  36  *
  37  * FUNCTION:    Acpi_rs_byte_stream_to_list
  38  *
  39  * PARAMETERS:  Byte_stream_buffer      - Pointer to the resource byte stream
  40  *              Byte_stream_buffer_length - Length of Byte_stream_buffer
  41  *              Output_buffer           - Pointer to the buffer that will
  42  *                                          contain the output structures
  43  *
  44  * RETURN:      Status  AE_OK if okay, else a valid ACPI_STATUS code
  45  *
  46  * DESCRIPTION: Takes the resource byte stream and parses it, creating a
  47  *              linked list of resources in the caller's output buffer
  48  *
  49  ******************************************************************************/
  50
  51 ACPI_STATUS
  52 acpi_rs_byte_stream_to_list (
  53         u8                      *byte_stream_buffer,
  54         u32                     byte_stream_buffer_length,
  55         u8                      **output_buffer)
  56 {
  57         ACPI_STATUS             status;
  58         u32                     bytes_parsed = 0;
  59         u8                      resource_type = 0;
  60         u32                     bytes_consumed = 0;
  61         u8                      **buffer = output_buffer;
  62         u32                     structure_size = 0;
  63         u8                      end_tag_processed = FALSE;
  64
  65
  66         while (bytes_parsed < byte_stream_buffer_length &&
  67                         FALSE == end_tag_processed) {
  68                 /*
  69                  * Look at the next byte in the stream
  70                  */
  71                 resource_type = *byte_stream_buffer;
  72
  73                 /*
  74                  * See if this is a small or large resource
  75                  */
  76                 if(resource_type & 0x80) {
  77                         /*
  78                          * Large Resource Type
  79                          */
  80                         switch (resource_type) {
  81                         case MEMORY_RANGE_24:
  82                                 /*
  83                                  * 24-Bit Memory Resource
  84                                  */
  85                                 status = acpi_rs_memory24_resource(byte_stream_buffer,
  86                                                    &bytes_consumed,
  87                                                    buffer,
  88                                                    &structure_size);
  89
  90                                 break;
  91
  92                         case LARGE_VENDOR_DEFINED:
  93                                 /*
  94                                  * Vendor Defined Resource
  95                                  */
  96                                 status = acpi_rs_vendor_resource(byte_stream_buffer,
  97                                                  &bytes_consumed,
  98                                                  buffer,
  99                                                  &structure_size);
 100
 101                                 break;
 102
 103                         case MEMORY_RANGE_32:
 104                                 /*
 105                                  * 32-Bit Memory Range Resource
 106                                  */
 107                                 status = acpi_rs_memory32_range_resource(byte_stream_buffer,
 108                                                   &bytes_consumed,
 109                                                   buffer,
 110                                                   &structure_size);
 111
 112                                 break;
 113
 114                         case FIXED_MEMORY_RANGE_32:
 115                                 /*
 116                                  * 32-Bit Fixed Memory Resource
 117                                  */
 118                                 status = acpi_rs_fixed_memory32_resource(byte_stream_buffer,
 119                                                   &bytes_consumed,
 120                                                   buffer,
 121                                                   &structure_size);
 122
 123                                 break;
 124
 125                         case DWORD_ADDRESS_SPACE:
 126                                 /*
 127                                  * 32-Bit Address Resource
 128                                  */
 129                                 status = acpi_rs_address32_resource(byte_stream_buffer,
 130                                                  &bytes_consumed,
 131                                                  buffer,
 132                                                  &structure_size);
 133
 134                                 break;
 135
 136                         case WORD_ADDRESS_SPACE:
 137                                 /*
 138                                  * 16-Bit Address Resource
 139                                  */
 140                                 status = acpi_rs_address16_resource(byte_stream_buffer,
 141                                                  &bytes_consumed,
 142                                                  buffer,
 143                                                  &structure_size);
 144
 145                                 break;
 146
 147                         case EXTENDED_IRQ:
 148                                 /*
 149                                  * Extended IRQ
 150                                  */
 151                                 status = acpi_rs_extended_irq_resource(byte_stream_buffer,
 152                                                    &bytes_consumed,
 153                                                    buffer,
 154                                                    &structure_size);
 155
 156                                 break;
 157
 158 /* TBD: [Future] 64-bit not currently supported */
 159 /*
 160                         case 0x8A:
 161                                 break;
 162 */
 163
 164                         default:
 165                                 /*
 166                                  * If we get here, everything is out of sync,
 167                                  *  so exit with an error
 168                                  */
 169                                 return (AE_AML_ERROR);
 170                                 break;
 171                         }
 172                 }
 173
 174                 else {
 175                         /*
 176                          * Small Resource Type
 177                          *  Only bits 7:3 are valid
 178                          */
 179                         resource_type >>= 3;
 180
 181                         switch(resource_type) {
 182                         case IRQ_FORMAT:
 183                                 /*
 184                                  * IRQ Resource
 185                                  */
 186                                 status = acpi_rs_irq_resource(byte_stream_buffer,
 187                                                  &bytes_consumed,
 188                                                  buffer,
 189                                                  &structure_size);
 190
 191                                 break;
 192
 193                         case DMA_FORMAT:
 194                                 /*
 195                                  * DMA Resource
 196                                  */
 197                                 status = acpi_rs_dma_resource(byte_stream_buffer,
 198                                                  &bytes_consumed,
 199                                                  buffer,
 200                                                  &structure_size);
 201
 202                                 break;
 203
 204                         case START_DEPENDENT_TAG:
 205                                 /*
 206                                  * Start Dependent Functions Resource
 207                                  */
 208                                 status = acpi_rs_start_dependent_functions_resource(byte_stream_buffer,
 209                                                    &bytes_consumed,
 210                                                    buffer,
 211                                                    &structure_size);
 212
 213                                 break;
 214
 215                         case END_DEPENDENT_TAG:
 216                                 /*
 217                                  * End Dependent Functions Resource
 218                                  */
 219                                 status = acpi_rs_end_dependent_functions_resource(byte_stream_buffer,
 220                                                  &bytes_consumed,
 221                                                  buffer,
 222                                                  &structure_size);
 223
 224                                 break;
 225
 226                         case IO_PORT_DESCRIPTOR:
 227                                 /*
 228                                  * IO Port Resource
 229                                  */
 230                                 status = acpi_rs_io_resource(byte_stream_buffer,
 231                                                    &bytes_consumed,
 232                                                    buffer,
 233                                                    &structure_size);
 234
 235                                 break;
 236
 237                         case FIXED_LOCATION_IO_DESCRIPTOR:
 238                                 /*
 239                                  * Fixed IO Port Resource
 240                                  */
 241                                 status = acpi_rs_fixed_io_resource(byte_stream_buffer,
 242                                                   &bytes_consumed,
 243                                                   buffer,
 244                                                   &structure_size);
 245
 246                                 break;
 247
 248                         case SMALL_VENDOR_DEFINED:
 249                                 /*
 250                                  * Vendor Specific Resource
 251                                  */
 252                                 status = acpi_rs_vendor_resource(byte_stream_buffer,
 253                                                  &bytes_consumed,
 254                                                  buffer,
 255                                                  &structure_size);
 256
 257                                 break;
 258
 259                         case END_TAG:
 260                                 /*
 261                                  * End Tag
 262                                  */
 263                                 status = acpi_rs_end_tag_resource(byte_stream_buffer,
 264                                                  &bytes_consumed,
 265                                                  buffer,
 266                                                  &structure_size);
 267                                 end_tag_processed = TRUE;
 268
 269                                 break;
 270
 271                         default:
 272                                 /*
 273                                  * If we get here, everything is out of sync,
 274                                  *  so exit with an error
 275                                  */
 276                                 return (AE_AML_ERROR);
 277                                 break;
 278
 279                         } /* switch */
 280                 }  /* end else */
 281
 282                 /*
 283                  * Update the return value and counter
 284                  */
 285                 bytes_parsed += bytes_consumed;
 286
 287                 /*
 288                  * Set the byte stream to point to the next resource
 289                  */
 290                 byte_stream_buffer += bytes_consumed;
 291
 292                 /*
 293                  * Set the Buffer to the next structure
 294                  */
 295                 *buffer += structure_size;
 296
 297         } /*  end while */
 298
 299         /*
 300          * Check the reason for exiting the while loop
 301          */
 302         if (TRUE != end_tag_processed) {
 303                 return (AE_AML_ERROR);
 304         }
 305
 306         return (AE_OK);
 307 }
 308
 309
 310 /*******************************************************************************
 311  *
 312  * FUNCTION:    Acpi_rs_list_to_byte_stream
 313  *
 314  * PARAMETERS:  Linked_list             - Pointer to the resource linked list
 315  *              Byte_steam_size_needed  - Calculated size of the byte stream
 316  *                                          needed from calling
 317  *                                          Acpi_rs_calculate_byte_stream_length()
 318  *                                          The size of the Output_buffer is
 319  *                                          guaranteed to be >=
 320  *                                          Byte_stream_size_needed
 321  *              Output_buffer           - Pointer to the buffer that will
 322  *                                          contain the byte stream
 323  *
 324  * RETURN:      Status  AE_OK if okay, else a valid ACPI_STATUS code
 325  *
 326  * DESCRIPTION: Takes the resource linked list and parses it, creating a
 327  *              byte stream of resources in the caller's output buffer
 328  *
 329  ******************************************************************************/
 330
 331 ACPI_STATUS
 332 acpi_rs_list_to_byte_stream (
 333         RESOURCE                *linked_list,
 334         u32                     byte_stream_size_needed,
 335         u8                      **output_buffer)
 336 {
 337         ACPI_STATUS             status;
 338         u8                      *buffer = *output_buffer;
 339         u32                     bytes_consumed = 0;
 340         u8                      done = FALSE;
 341
 342
 343         while (!done) {
 344                 switch (linked_list->id) {
 345                 case irq:
 346                         /*
 347                          * IRQ Resource
 348                          */
 349                         status = acpi_rs_irq_stream (linked_list,
 350                                            &buffer,
 351                                            &bytes_consumed);
 352                         break;
 353
 354                 case dma:
 355                         /*
 356                          * DMA Resource
 357                          */
 358                         status = acpi_rs_dma_stream (linked_list,
 359                                            &buffer,
 360                                            &bytes_consumed);
 361                         break;
 362
 363                 case start_dependent_functions:
 364                         /*
 365                          * Start Dependent Functions Resource
 366                          */
 367                         status = acpi_rs_start_dependent_functions_stream (linked_list,
 368                                           &buffer,
 369                                           &bytes_consumed);
 370                         break;
 371
 372                 case end_dependent_functions:
 373                         /*
 374                          * End Dependent Functions Resource
 375                          */
 376                         status = acpi_rs_end_dependent_functions_stream (linked_list,
 377                                            &buffer,
 378                                            &bytes_consumed);
 379                         break;
 380
 381                 case io:
 382                         /*
 383                          * IO Port Resource
 384                          */
 385                         status = acpi_rs_io_stream (linked_list,
 386                                           &buffer,
 387                                           &bytes_consumed);
 388                         break;
 389
 390                 case fixed_io:
 391                         /*
 392                          * Fixed IO Port Resource
 393                          */
 394                         status = acpi_rs_fixed_io_stream (linked_list,
 395                                          &buffer,
 396                                          &bytes_consumed);
 397                         break;
 398
 399                 case vendor_specific:
 400                         /*
 401                          * Vendor Defined Resource
 402                          */
 403                         status = acpi_rs_vendor_stream (linked_list,
 404                                            &buffer,
 405                                            &bytes_consumed);
 406                         break;
 407
 408                 case end_tag:
 409                         /*
 410                          * End Tag
 411                          */
 412                         status = acpi_rs_end_tag_stream (linked_list,
 413                                            &buffer,
 414                                            &bytes_consumed);
 415
 416                         /*
 417                          * An End Tag indicates the end of the Resource Template
 418                          */
 419                         done = TRUE;
 420                         break;
 421
 422                 case memory24:
 423                         /*
 424                          * 24-Bit Memory Resource
 425                          */
 426                         status = acpi_rs_memory24_stream (linked_list,
 427                                           &buffer,
 428                                           &bytes_consumed);
 429                         break;
 430
 431                 case memory32:
 432                         /*
 433                          * 32-Bit Memory Range Resource
 434                          */
 435                         status = acpi_rs_memory32_range_stream (linked_list,
 436                                          &buffer,
 437                                          &bytes_consumed);
 438                         break;
 439
 440                 case fixed_memory32:
 441                         /*
 442                          * 32-Bit Fixed Memory Resource
 443                          */
 444                         status = acpi_rs_fixed_memory32_stream (linked_list,
 445                                          &buffer,
 446                                          &bytes_consumed);
 447                         break;
 448
 449                 case address16:
 450                         /*
 451                          * 16-Bit Address Descriptor Resource
 452                          */
 453                         status = acpi_rs_address16_stream (linked_list,
 454                                            &buffer,
 455                                            &bytes_consumed);
 456                         break;
 457
 458                 case address32:
 459                         /*
 460                          * 32-Bit Address Descriptor Resource
 461                          */
 462                         status = acpi_rs_address32_stream (linked_list,
 463                                            &buffer,
 464                                            &bytes_consumed);
 465                         break;
 466
 467                 case extended_irq:
 468                         /*
 469                          * Extended IRQ Resource
 470                          */
 471                         status = acpi_rs_extended_irq_stream (linked_list,
 472                                           &buffer,
 473                                           &bytes_consumed);
 474                         break;
 475
 476                 default:
 477                         /*
 478                          * If we get here, everything is out of sync,
 479                          *  so exit with an error
 480                          */
 481                         return (AE_BAD_DATA);
 482                         break;
 483
 484                 } /* switch (Linked_list->Id) */
 485
 486                 /*
 487                  * Set the Buffer to point to the open byte
 488                  */
 489                 buffer += bytes_consumed;
 490
 491                 /*
 492                  * Point to the next object
 493                  */
 494                 linked_list = (RESOURCE *) ((NATIVE_UINT) linked_list +
 495                                   (NATIVE_UINT) linked_list->length);
 496         }
 497
 498         return  (AE_OK);
 499 }
 500