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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 | /******************************************************************************* * * Module Name: rsirq - IRQ resource descriptors * ******************************************************************************/ /* * Copyright (C) 2000 - 2005, R. Byron Moore * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer, * without modification. * 2. Redistributions in binary form must reproduce at minimum a disclaimer * substantially similar to the "NO WARRANTY" disclaimer below * ("Disclaimer") and any redistribution must be conditioned upon * including a substantially similar Disclaimer requirement for further * binary redistribution. * 3. Neither the names of the above-listed copyright holders nor the names * of any contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * Alternatively, this software may be distributed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * * NO WARRANTY * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGES. */ #include <acpi/acpi.h> #include <acpi/acresrc.h> #define _COMPONENT ACPI_RESOURCES ACPI_MODULE_NAME ("rsirq") /******************************************************************************* * * FUNCTION: acpi_rs_irq_resource * * PARAMETERS: byte_stream_buffer - Pointer to the resource input byte * stream * bytes_consumed - Pointer to where the number of bytes * consumed the byte_stream_buffer is * returned * output_buffer - Pointer to the return data buffer * structure_size - Pointer to where the number of bytes * in the return data struct is returned * * RETURN: Status * * DESCRIPTION: Take the resource byte stream and fill out the appropriate * structure pointed to by the output_buffer. Return the * number of bytes consumed from the byte stream. * ******************************************************************************/ acpi_status acpi_rs_irq_resource ( u8 *byte_stream_buffer, acpi_size *bytes_consumed, u8 **output_buffer, acpi_size *structure_size) { u8 *buffer = byte_stream_buffer; struct acpi_resource *output_struct = (void *) *output_buffer; u16 temp16 = 0; u8 temp8 = 0; u8 index; u8 i; acpi_size struct_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_irq); ACPI_FUNCTION_TRACE ("rs_irq_resource"); /* * The number of bytes consumed are contained in the descriptor * (Bits:0-1) */ temp8 = *buffer; *bytes_consumed = (temp8 & 0x03) + 1; output_struct->id = ACPI_RSTYPE_IRQ; /* * Point to the 16-bits of Bytes 1 and 2 */ buffer += 1; ACPI_MOVE_16_TO_16 (&temp16, buffer); output_struct->data.irq.number_of_interrupts = 0; /* Decode the IRQ bits */ for (i = 0, index = 0; index < 16; index++) { if ((temp16 >> index) & 0x01) { output_struct->data.irq.interrupts[i] = index; i++; } } /* Zero interrupts is valid */ output_struct->data.irq.number_of_interrupts = i; if (i > 0) { /* * Calculate the structure size based upon the number of interrupts */ struct_size += ((acpi_size) i - 1) * 4; } /* * Point to Byte 3 if it is used */ if (4 == *bytes_consumed) { buffer += 2; temp8 = *buffer; /* * Check for HE, LL interrupts */ switch (temp8 & 0x09) { case 0x01: /* HE */ output_struct->data.irq.edge_level = ACPI_EDGE_SENSITIVE; output_struct->data.irq.active_high_low = ACPI_ACTIVE_HIGH; break; case 0x08: /* LL */ output_struct->data.irq.edge_level = ACPI_LEVEL_SENSITIVE; output_struct->data.irq.active_high_low = ACPI_ACTIVE_LOW; break; default: /* * Only _LL and _HE polarity/trigger interrupts * are allowed (ACPI spec, section "IRQ Format") * so 0x00 and 0x09 are illegal. */ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid interrupt polarity/trigger in resource list, %X\n", temp8)); return_ACPI_STATUS (AE_BAD_DATA); } /* * Check for sharable */ output_struct->data.irq.shared_exclusive = (temp8 >> 3) & 0x01; } else { /* * Assume Edge Sensitive, Active High, Non-Sharable * per ACPI Specification */ output_struct->data.irq.edge_level = ACPI_EDGE_SENSITIVE; output_struct->data.irq.active_high_low = ACPI_ACTIVE_HIGH; output_struct->data.irq.shared_exclusive = ACPI_EXCLUSIVE; } /* * Set the Length parameter */ output_struct->length = (u32) struct_size; /* * Return the final size of the structure */ *structure_size = struct_size; return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: acpi_rs_irq_stream * * PARAMETERS: linked_list - Pointer to the resource linked list * output_buffer - Pointer to the user's return buffer * bytes_consumed - Pointer to where the number of bytes * used in the output_buffer is returned * * RETURN: Status * * DESCRIPTION: Take the linked list resource structure and fills in the * the appropriate bytes in a byte stream * ******************************************************************************/ acpi_status acpi_rs_irq_stream ( struct acpi_resource *linked_list, u8 **output_buffer, acpi_size *bytes_consumed) { u8 *buffer = *output_buffer; u16 temp16 = 0; u8 temp8 = 0; u8 index; u8 IRqinfo_byte_needed; ACPI_FUNCTION_TRACE ("rs_irq_stream"); /* * The descriptor field is set based upon whether a third byte is * needed to contain the IRQ Information. */ if (ACPI_EDGE_SENSITIVE == linked_list->data.irq.edge_level && ACPI_ACTIVE_HIGH == linked_list->data.irq.active_high_low && ACPI_EXCLUSIVE == linked_list->data.irq.shared_exclusive) { *buffer = 0x22; IRqinfo_byte_needed = FALSE; } else { *buffer = 0x23; IRqinfo_byte_needed = TRUE; } buffer += 1; temp16 = 0; /* * Loop through all of the interrupts and set the mask bits */ for(index = 0; index < linked_list->data.irq.number_of_interrupts; index++) { temp8 = (u8) linked_list->data.irq.interrupts[index]; temp16 |= 0x1 << temp8; } ACPI_MOVE_16_TO_16 (buffer, &temp16); buffer += 2; /* * Set the IRQ Info byte if needed. */ if (IRqinfo_byte_needed) { temp8 = 0; temp8 = (u8) ((linked_list->data.irq.shared_exclusive & 0x01) << 4); if (ACPI_LEVEL_SENSITIVE == linked_list->data.irq.edge_level && ACPI_ACTIVE_LOW == linked_list->data.irq.active_high_low) { temp8 |= 0x08; } else { temp8 |= 0x01; } *buffer = temp8; buffer += 1; } /* * Return the number of bytes consumed in this operation */ *bytes_consumed = ACPI_PTR_DIFF (buffer, *output_buffer); return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: acpi_rs_extended_irq_resource * * PARAMETERS: byte_stream_buffer - Pointer to the resource input byte * stream * bytes_consumed - Pointer to where the number of bytes * consumed the byte_stream_buffer is * returned * output_buffer - Pointer to the return data buffer * structure_size - Pointer to where the number of bytes * in the return data struct is returned * * RETURN: Status * * DESCRIPTION: Take the resource byte stream and fill out the appropriate * structure pointed to by the output_buffer. Return the * number of bytes consumed from the byte stream. * ******************************************************************************/ acpi_status acpi_rs_extended_irq_resource ( u8 *byte_stream_buffer, acpi_size *bytes_consumed, u8 **output_buffer, acpi_size *structure_size) { u8 *buffer = byte_stream_buffer; struct acpi_resource *output_struct = (void *) *output_buffer; u16 temp16 = 0; u8 temp8 = 0; u8 *temp_ptr; u8 index; acpi_size struct_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_ext_irq); ACPI_FUNCTION_TRACE ("rs_extended_irq_resource"); /* * Point past the Descriptor to get the number of bytes consumed */ buffer += 1; ACPI_MOVE_16_TO_16 (&temp16, buffer); /* Validate minimum descriptor length */ if (temp16 < 6) { return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH); } *bytes_consumed = temp16 + 3; output_struct->id = ACPI_RSTYPE_EXT_IRQ; /* * Point to the Byte3 */ buffer += 2; temp8 = *buffer; output_struct->data.extended_irq.producer_consumer = temp8 & 0x01; /* * Check for Interrupt Mode * * The definition of an Extended IRQ changed between ACPI spec v1.0b * and ACPI spec 2.0 (section 6.4.3.6 in both). * * - Edge/Level are defined opposite in the table vs the headers */ output_struct->data.extended_irq.edge_level = (temp8 & 0x2) ? ACPI_EDGE_SENSITIVE : ACPI_LEVEL_SENSITIVE; /* * Check Interrupt Polarity */ output_struct->data.extended_irq.active_high_low = (temp8 >> 2) & 0x1; /* * Check for sharable */ output_struct->data.extended_irq.shared_exclusive = (temp8 >> 3) & 0x01; /* * Point to Byte4 (IRQ Table length) */ buffer += 1; temp8 = *buffer; /* Must have at least one IRQ */ if (temp8 < 1) { return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH); } output_struct->data.extended_irq.number_of_interrupts = temp8; /* * Add any additional structure size to properly calculate * the next pointer at the end of this function */ struct_size += (temp8 - 1) * 4; /* * Point to Byte5 (First IRQ Number) */ buffer += 1; /* * Cycle through every IRQ in the table */ for (index = 0; index < temp8; index++) { ACPI_MOVE_32_TO_32 ( &output_struct->data.extended_irq.interrupts[index], buffer); /* Point to the next IRQ */ buffer += 4; } /* * This will leave us pointing to the Resource Source Index * If it is present, then save it off and calculate the * pointer to where the null terminated string goes: * Each Interrupt takes 32-bits + the 5 bytes of the * stream that are default. * * Note: Some resource descriptors will have an additional null, so * we add 1 to the length. */ if (*bytes_consumed > ((acpi_size) output_struct->data.extended_irq.number_of_interrupts * 4) + (5 + 1)) { /* Dereference the Index */ temp8 = *buffer; output_struct->data.extended_irq.resource_source.index = (u32) temp8; /* Point to the String */ buffer += 1; /* * Point the String pointer to the end of this structure. */ output_struct->data.extended_irq.resource_source.string_ptr = (char *)((char *) output_struct + struct_size); temp_ptr = (u8 *) output_struct->data.extended_irq.resource_source.string_ptr; /* Copy the string into the buffer */ index = 0; while (0x00 != *buffer) { *temp_ptr = *buffer; temp_ptr += 1; buffer += 1; index += 1; } /* * Add the terminating null */ *temp_ptr = 0x00; output_struct->data.extended_irq.resource_source.string_length = index + 1; /* * In order for the struct_size to fall on a 32-bit boundary, * calculate the length of the string and expand the * struct_size to the next 32-bit boundary. */ temp8 = (u8) (index + 1); struct_size += ACPI_ROUND_UP_to_32_bITS (temp8); } else { output_struct->data.extended_irq.resource_source.index = 0x00; output_struct->data.extended_irq.resource_source.string_length = 0; output_struct->data.extended_irq.resource_source.string_ptr = NULL; } /* * Set the Length parameter */ output_struct->length = (u32) struct_size; /* * Return the final size of the structure */ *structure_size = struct_size; return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: acpi_rs_extended_irq_stream * * PARAMETERS: linked_list - Pointer to the resource linked list * output_buffer - Pointer to the user's return buffer * bytes_consumed - Pointer to where the number of bytes * used in the output_buffer is returned * * RETURN: Status * * DESCRIPTION: Take the linked list resource structure and fills in the * the appropriate bytes in a byte stream * ******************************************************************************/ acpi_status acpi_rs_extended_irq_stream ( struct acpi_resource *linked_list, u8 **output_buffer, acpi_size *bytes_consumed) { u8 *buffer = *output_buffer; u16 *length_field; u8 temp8 = 0; u8 index; char *temp_pointer = NULL; ACPI_FUNCTION_TRACE ("rs_extended_irq_stream"); /* * The descriptor field is static */ *buffer = 0x89; buffer += 1; /* * Set a pointer to the Length field - to be filled in later */ length_field = ACPI_CAST_PTR (u16, buffer); buffer += 2; /* * Set the Interrupt vector flags */ temp8 = (u8)(linked_list->data.extended_irq.producer_consumer & 0x01); temp8 |= ((linked_list->data.extended_irq.shared_exclusive & 0x01) << 3); /* * Set the Interrupt Mode * * The definition of an Extended IRQ changed between ACPI spec v1.0b * and ACPI spec 2.0 (section 6.4.3.6 in both). This code does not * implement the more restrictive definition of 1.0b * * - Edge/Level are defined opposite in the table vs the headers */ if (ACPI_EDGE_SENSITIVE == linked_list->data.extended_irq.edge_level) { temp8 |= 0x2; } /* * Set the Interrupt Polarity */ temp8 |= ((linked_list->data.extended_irq.active_high_low & 0x1) << 2); *buffer = temp8; buffer += 1; /* * Set the Interrupt table length */ temp8 = (u8) linked_list->data.extended_irq.number_of_interrupts; *buffer = temp8; buffer += 1; for (index = 0; index < linked_list->data.extended_irq.number_of_interrupts; index++) { ACPI_MOVE_32_TO_32 (buffer, &linked_list->data.extended_irq.interrupts[index]); buffer += 4; } /* * Resource Source Index and Resource Source are optional */ if (0 != linked_list->data.extended_irq.resource_source.string_length) { *buffer = (u8) linked_list->data.extended_irq.resource_source.index; buffer += 1; temp_pointer = (char *) buffer; /* * Copy the string */ ACPI_STRCPY (temp_pointer, linked_list->data.extended_irq.resource_source.string_ptr); /* * Buffer needs to be set to the length of the sting + one for the * terminating null */ buffer += (acpi_size)(ACPI_STRLEN (linked_list->data.extended_irq.resource_source.string_ptr) + 1); } /* * Return the number of bytes consumed in this operation */ *bytes_consumed = ACPI_PTR_DIFF (buffer, *output_buffer); /* * Set the length field to the number of bytes consumed * minus the header size (3 bytes) */ *length_field = (u16) (*bytes_consumed - 3); return_ACPI_STATUS (AE_OK); } |