Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * |
| 3 | * Module Name: rsirq - IRQ resource descriptors |
| 4 | * |
| 5 | ******************************************************************************/ |
| 6 | |
| 7 | /* |
| 8 | * Copyright (C) 2000 - 2005, R. Byron Moore |
| 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 | |
| 44 | |
| 45 | #include <acpi/acpi.h> |
| 46 | #include <acpi/acresrc.h> |
| 47 | |
| 48 | #define _COMPONENT ACPI_RESOURCES |
| 49 | ACPI_MODULE_NAME ("rsirq") |
| 50 | |
| 51 | |
| 52 | /******************************************************************************* |
| 53 | * |
| 54 | * FUNCTION: acpi_rs_irq_resource |
| 55 | * |
| 56 | * PARAMETERS: byte_stream_buffer - Pointer to the resource input byte |
| 57 | * stream |
| 58 | * bytes_consumed - Pointer to where the number of bytes |
| 59 | * consumed the byte_stream_buffer is |
| 60 | * returned |
| 61 | * output_buffer - Pointer to the return data buffer |
| 62 | * structure_size - Pointer to where the number of bytes |
| 63 | * in the return data struct is returned |
| 64 | * |
| 65 | * RETURN: Status |
| 66 | * |
| 67 | * DESCRIPTION: Take the resource byte stream and fill out the appropriate |
| 68 | * structure pointed to by the output_buffer. Return the |
| 69 | * number of bytes consumed from the byte stream. |
| 70 | * |
| 71 | ******************************************************************************/ |
| 72 | |
| 73 | acpi_status |
| 74 | acpi_rs_irq_resource ( |
| 75 | u8 *byte_stream_buffer, |
| 76 | acpi_size *bytes_consumed, |
| 77 | u8 **output_buffer, |
| 78 | acpi_size *structure_size) |
| 79 | { |
| 80 | u8 *buffer = byte_stream_buffer; |
| 81 | struct acpi_resource *output_struct = (void *) *output_buffer; |
| 82 | u16 temp16 = 0; |
| 83 | u8 temp8 = 0; |
| 84 | u8 index; |
| 85 | u8 i; |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 86 | acpi_size struct_size = ACPI_SIZEOF_RESOURCE ( |
| 87 | struct acpi_resource_irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | |
| 89 | |
| 90 | ACPI_FUNCTION_TRACE ("rs_irq_resource"); |
| 91 | |
| 92 | |
| 93 | /* |
| 94 | * The number of bytes consumed are contained in the descriptor |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 95 | * (Bits:0-1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | */ |
| 97 | temp8 = *buffer; |
| 98 | *bytes_consumed = (temp8 & 0x03) + 1; |
| 99 | output_struct->id = ACPI_RSTYPE_IRQ; |
| 100 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 101 | /* Point to the 16-bits of Bytes 1 and 2 */ |
| 102 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | buffer += 1; |
| 104 | ACPI_MOVE_16_TO_16 (&temp16, buffer); |
| 105 | |
| 106 | output_struct->data.irq.number_of_interrupts = 0; |
| 107 | |
| 108 | /* Decode the IRQ bits */ |
| 109 | |
| 110 | for (i = 0, index = 0; index < 16; index++) { |
| 111 | if ((temp16 >> index) & 0x01) { |
| 112 | output_struct->data.irq.interrupts[i] = index; |
| 113 | i++; |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | /* Zero interrupts is valid */ |
| 118 | |
| 119 | output_struct->data.irq.number_of_interrupts = i; |
| 120 | if (i > 0) { |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 121 | /* Calculate the structure size based upon the number of interrupts */ |
| 122 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | struct_size += ((acpi_size) i - 1) * 4; |
| 124 | } |
| 125 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 126 | /* Point to Byte 3 if it is used */ |
| 127 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | if (4 == *bytes_consumed) { |
| 129 | buffer += 2; |
| 130 | temp8 = *buffer; |
| 131 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 132 | /* Check for HE, LL interrupts */ |
| 133 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | switch (temp8 & 0x09) { |
| 135 | case 0x01: /* HE */ |
| 136 | output_struct->data.irq.edge_level = ACPI_EDGE_SENSITIVE; |
| 137 | output_struct->data.irq.active_high_low = ACPI_ACTIVE_HIGH; |
| 138 | break; |
| 139 | |
| 140 | case 0x08: /* LL */ |
| 141 | output_struct->data.irq.edge_level = ACPI_LEVEL_SENSITIVE; |
| 142 | output_struct->data.irq.active_high_low = ACPI_ACTIVE_LOW; |
| 143 | break; |
| 144 | |
| 145 | default: |
| 146 | /* |
| 147 | * Only _LL and _HE polarity/trigger interrupts |
| 148 | * are allowed (ACPI spec, section "IRQ Format") |
| 149 | * so 0x00 and 0x09 are illegal. |
| 150 | */ |
| 151 | ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 152 | "Invalid interrupt polarity/trigger in resource list, %X\n", |
| 153 | temp8)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | return_ACPI_STATUS (AE_BAD_DATA); |
| 155 | } |
| 156 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 157 | /* Check for sharable */ |
| 158 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | output_struct->data.irq.shared_exclusive = (temp8 >> 3) & 0x01; |
| 160 | } |
| 161 | else { |
| 162 | /* |
| 163 | * Assume Edge Sensitive, Active High, Non-Sharable |
| 164 | * per ACPI Specification |
| 165 | */ |
| 166 | output_struct->data.irq.edge_level = ACPI_EDGE_SENSITIVE; |
| 167 | output_struct->data.irq.active_high_low = ACPI_ACTIVE_HIGH; |
| 168 | output_struct->data.irq.shared_exclusive = ACPI_EXCLUSIVE; |
| 169 | } |
| 170 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 171 | /* Set the Length parameter */ |
| 172 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | output_struct->length = (u32) struct_size; |
| 174 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 175 | /* Return the final size of the structure */ |
| 176 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | *structure_size = struct_size; |
| 178 | return_ACPI_STATUS (AE_OK); |
| 179 | } |
| 180 | |
| 181 | |
| 182 | /******************************************************************************* |
| 183 | * |
| 184 | * FUNCTION: acpi_rs_irq_stream |
| 185 | * |
| 186 | * PARAMETERS: linked_list - Pointer to the resource linked list |
| 187 | * output_buffer - Pointer to the user's return buffer |
| 188 | * bytes_consumed - Pointer to where the number of bytes |
| 189 | * used in the output_buffer is returned |
| 190 | * |
| 191 | * RETURN: Status |
| 192 | * |
| 193 | * DESCRIPTION: Take the linked list resource structure and fills in the |
| 194 | * the appropriate bytes in a byte stream |
| 195 | * |
| 196 | ******************************************************************************/ |
| 197 | |
| 198 | acpi_status |
| 199 | acpi_rs_irq_stream ( |
| 200 | struct acpi_resource *linked_list, |
| 201 | u8 **output_buffer, |
| 202 | acpi_size *bytes_consumed) |
| 203 | { |
| 204 | u8 *buffer = *output_buffer; |
| 205 | u16 temp16 = 0; |
| 206 | u8 temp8 = 0; |
| 207 | u8 index; |
| 208 | u8 IRqinfo_byte_needed; |
| 209 | |
| 210 | |
| 211 | ACPI_FUNCTION_TRACE ("rs_irq_stream"); |
| 212 | |
| 213 | |
| 214 | /* |
| 215 | * The descriptor field is set based upon whether a third byte is |
| 216 | * needed to contain the IRQ Information. |
| 217 | */ |
| 218 | if (ACPI_EDGE_SENSITIVE == linked_list->data.irq.edge_level && |
| 219 | ACPI_ACTIVE_HIGH == linked_list->data.irq.active_high_low && |
| 220 | ACPI_EXCLUSIVE == linked_list->data.irq.shared_exclusive) { |
| 221 | *buffer = 0x22; |
| 222 | IRqinfo_byte_needed = FALSE; |
| 223 | } |
| 224 | else { |
| 225 | *buffer = 0x23; |
| 226 | IRqinfo_byte_needed = TRUE; |
| 227 | } |
| 228 | |
| 229 | buffer += 1; |
| 230 | temp16 = 0; |
| 231 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 232 | /* Loop through all of the interrupts and set the mask bits */ |
| 233 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | for(index = 0; |
| 235 | index < linked_list->data.irq.number_of_interrupts; |
| 236 | index++) { |
| 237 | temp8 = (u8) linked_list->data.irq.interrupts[index]; |
| 238 | temp16 |= 0x1 << temp8; |
| 239 | } |
| 240 | |
| 241 | ACPI_MOVE_16_TO_16 (buffer, &temp16); |
| 242 | buffer += 2; |
| 243 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 244 | /* Set the IRQ Info byte if needed. */ |
| 245 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | if (IRqinfo_byte_needed) { |
| 247 | temp8 = 0; |
| 248 | temp8 = (u8) ((linked_list->data.irq.shared_exclusive & |
| 249 | 0x01) << 4); |
| 250 | |
| 251 | if (ACPI_LEVEL_SENSITIVE == linked_list->data.irq.edge_level && |
| 252 | ACPI_ACTIVE_LOW == linked_list->data.irq.active_high_low) { |
| 253 | temp8 |= 0x08; |
| 254 | } |
| 255 | else { |
| 256 | temp8 |= 0x01; |
| 257 | } |
| 258 | |
| 259 | *buffer = temp8; |
| 260 | buffer += 1; |
| 261 | } |
| 262 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 263 | /* Return the number of bytes consumed in this operation */ |
| 264 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | *bytes_consumed = ACPI_PTR_DIFF (buffer, *output_buffer); |
| 266 | return_ACPI_STATUS (AE_OK); |
| 267 | } |
| 268 | |
| 269 | |
| 270 | /******************************************************************************* |
| 271 | * |
| 272 | * FUNCTION: acpi_rs_extended_irq_resource |
| 273 | * |
| 274 | * PARAMETERS: byte_stream_buffer - Pointer to the resource input byte |
| 275 | * stream |
| 276 | * bytes_consumed - Pointer to where the number of bytes |
| 277 | * consumed the byte_stream_buffer is |
| 278 | * returned |
| 279 | * output_buffer - Pointer to the return data buffer |
| 280 | * structure_size - Pointer to where the number of bytes |
| 281 | * in the return data struct is returned |
| 282 | * |
| 283 | * RETURN: Status |
| 284 | * |
| 285 | * DESCRIPTION: Take the resource byte stream and fill out the appropriate |
| 286 | * structure pointed to by the output_buffer. Return the |
| 287 | * number of bytes consumed from the byte stream. |
| 288 | * |
| 289 | ******************************************************************************/ |
| 290 | |
| 291 | acpi_status |
| 292 | acpi_rs_extended_irq_resource ( |
| 293 | u8 *byte_stream_buffer, |
| 294 | acpi_size *bytes_consumed, |
| 295 | u8 **output_buffer, |
| 296 | acpi_size *structure_size) |
| 297 | { |
| 298 | u8 *buffer = byte_stream_buffer; |
| 299 | struct acpi_resource *output_struct = (void *) *output_buffer; |
| 300 | u16 temp16 = 0; |
| 301 | u8 temp8 = 0; |
| 302 | u8 *temp_ptr; |
| 303 | u8 index; |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 304 | acpi_size struct_size = ACPI_SIZEOF_RESOURCE ( |
| 305 | struct acpi_resource_ext_irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | |
| 307 | |
| 308 | ACPI_FUNCTION_TRACE ("rs_extended_irq_resource"); |
| 309 | |
| 310 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 311 | /* Point past the Descriptor to get the number of bytes consumed */ |
| 312 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | buffer += 1; |
| 314 | ACPI_MOVE_16_TO_16 (&temp16, buffer); |
| 315 | |
| 316 | /* Validate minimum descriptor length */ |
| 317 | |
| 318 | if (temp16 < 6) { |
| 319 | return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH); |
| 320 | } |
| 321 | |
| 322 | *bytes_consumed = temp16 + 3; |
| 323 | output_struct->id = ACPI_RSTYPE_EXT_IRQ; |
| 324 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 325 | /* Point to the Byte3 */ |
| 326 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | buffer += 2; |
| 328 | temp8 = *buffer; |
| 329 | |
| 330 | output_struct->data.extended_irq.producer_consumer = temp8 & 0x01; |
| 331 | |
| 332 | /* |
| 333 | * Check for Interrupt Mode |
| 334 | * |
| 335 | * The definition of an Extended IRQ changed between ACPI spec v1.0b |
| 336 | * and ACPI spec 2.0 (section 6.4.3.6 in both). |
| 337 | * |
| 338 | * - Edge/Level are defined opposite in the table vs the headers |
| 339 | */ |
| 340 | output_struct->data.extended_irq.edge_level = |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 341 | (temp8 & 0x2) ? ACPI_EDGE_SENSITIVE : ACPI_LEVEL_SENSITIVE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 343 | /* Check Interrupt Polarity */ |
| 344 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | output_struct->data.extended_irq.active_high_low = (temp8 >> 2) & 0x1; |
| 346 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 347 | /* Check for sharable */ |
| 348 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | output_struct->data.extended_irq.shared_exclusive = (temp8 >> 3) & 0x01; |
| 350 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 351 | /* Point to Byte4 (IRQ Table length) */ |
| 352 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | buffer += 1; |
| 354 | temp8 = *buffer; |
| 355 | |
| 356 | /* Must have at least one IRQ */ |
| 357 | |
| 358 | if (temp8 < 1) { |
| 359 | return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH); |
| 360 | } |
| 361 | |
| 362 | output_struct->data.extended_irq.number_of_interrupts = temp8; |
| 363 | |
| 364 | /* |
| 365 | * Add any additional structure size to properly calculate |
| 366 | * the next pointer at the end of this function |
| 367 | */ |
| 368 | struct_size += (temp8 - 1) * 4; |
| 369 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 370 | /* Point to Byte5 (First IRQ Number) */ |
| 371 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | buffer += 1; |
| 373 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 374 | /* Cycle through every IRQ in the table */ |
| 375 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | for (index = 0; index < temp8; index++) { |
| 377 | ACPI_MOVE_32_TO_32 ( |
| 378 | &output_struct->data.extended_irq.interrupts[index], buffer); |
| 379 | |
| 380 | /* Point to the next IRQ */ |
| 381 | |
| 382 | buffer += 4; |
| 383 | } |
| 384 | |
| 385 | /* |
| 386 | * This will leave us pointing to the Resource Source Index |
| 387 | * If it is present, then save it off and calculate the |
| 388 | * pointer to where the null terminated string goes: |
| 389 | * Each Interrupt takes 32-bits + the 5 bytes of the |
| 390 | * stream that are default. |
| 391 | * |
| 392 | * Note: Some resource descriptors will have an additional null, so |
| 393 | * we add 1 to the length. |
| 394 | */ |
| 395 | if (*bytes_consumed > |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 396 | ((acpi_size) output_struct->data.extended_irq.number_of_interrupts * 4) + |
| 397 | (5 + 1)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | /* Dereference the Index */ |
| 399 | |
| 400 | temp8 = *buffer; |
| 401 | output_struct->data.extended_irq.resource_source.index = (u32) temp8; |
| 402 | |
| 403 | /* Point to the String */ |
| 404 | |
| 405 | buffer += 1; |
| 406 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 407 | /* Point the String pointer to the end of this structure. */ |
| 408 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | output_struct->data.extended_irq.resource_source.string_ptr = |
| 410 | (char *)((char *) output_struct + struct_size); |
| 411 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 412 | temp_ptr = (u8 *) |
| 413 | output_struct->data.extended_irq.resource_source.string_ptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | |
| 415 | /* Copy the string into the buffer */ |
| 416 | |
| 417 | index = 0; |
| 418 | while (0x00 != *buffer) { |
| 419 | *temp_ptr = *buffer; |
| 420 | |
| 421 | temp_ptr += 1; |
| 422 | buffer += 1; |
| 423 | index += 1; |
| 424 | } |
| 425 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 426 | /* Add the terminating null */ |
| 427 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | *temp_ptr = 0x00; |
| 429 | output_struct->data.extended_irq.resource_source.string_length = index + 1; |
| 430 | |
| 431 | /* |
| 432 | * In order for the struct_size to fall on a 32-bit boundary, |
| 433 | * calculate the length of the string and expand the |
| 434 | * struct_size to the next 32-bit boundary. |
| 435 | */ |
| 436 | temp8 = (u8) (index + 1); |
| 437 | struct_size += ACPI_ROUND_UP_to_32_bITS (temp8); |
| 438 | } |
| 439 | else { |
| 440 | output_struct->data.extended_irq.resource_source.index = 0x00; |
| 441 | output_struct->data.extended_irq.resource_source.string_length = 0; |
| 442 | output_struct->data.extended_irq.resource_source.string_ptr = NULL; |
| 443 | } |
| 444 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 445 | /* Set the Length parameter */ |
| 446 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | output_struct->length = (u32) struct_size; |
| 448 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 449 | /* Return the final size of the structure */ |
| 450 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | *structure_size = struct_size; |
| 452 | return_ACPI_STATUS (AE_OK); |
| 453 | } |
| 454 | |
| 455 | |
| 456 | /******************************************************************************* |
| 457 | * |
| 458 | * FUNCTION: acpi_rs_extended_irq_stream |
| 459 | * |
| 460 | * PARAMETERS: linked_list - Pointer to the resource linked list |
| 461 | * output_buffer - Pointer to the user's return buffer |
| 462 | * bytes_consumed - Pointer to where the number of bytes |
| 463 | * used in the output_buffer is returned |
| 464 | * |
| 465 | * RETURN: Status |
| 466 | * |
| 467 | * DESCRIPTION: Take the linked list resource structure and fills in the |
| 468 | * the appropriate bytes in a byte stream |
| 469 | * |
| 470 | ******************************************************************************/ |
| 471 | |
| 472 | acpi_status |
| 473 | acpi_rs_extended_irq_stream ( |
| 474 | struct acpi_resource *linked_list, |
| 475 | u8 **output_buffer, |
| 476 | acpi_size *bytes_consumed) |
| 477 | { |
| 478 | u8 *buffer = *output_buffer; |
| 479 | u16 *length_field; |
| 480 | u8 temp8 = 0; |
| 481 | u8 index; |
| 482 | char *temp_pointer = NULL; |
| 483 | |
| 484 | |
| 485 | ACPI_FUNCTION_TRACE ("rs_extended_irq_stream"); |
| 486 | |
| 487 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 488 | /* The descriptor field is static */ |
| 489 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | *buffer = 0x89; |
| 491 | buffer += 1; |
| 492 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 493 | /* Set a pointer to the Length field - to be filled in later */ |
| 494 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | length_field = ACPI_CAST_PTR (u16, buffer); |
| 496 | buffer += 2; |
| 497 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 498 | /* Set the Interrupt vector flags */ |
| 499 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | temp8 = (u8)(linked_list->data.extended_irq.producer_consumer & 0x01); |
| 501 | temp8 |= ((linked_list->data.extended_irq.shared_exclusive & 0x01) << 3); |
| 502 | |
| 503 | /* |
| 504 | * Set the Interrupt Mode |
| 505 | * |
| 506 | * The definition of an Extended IRQ changed between ACPI spec v1.0b |
| 507 | * and ACPI spec 2.0 (section 6.4.3.6 in both). This code does not |
| 508 | * implement the more restrictive definition of 1.0b |
| 509 | * |
| 510 | * - Edge/Level are defined opposite in the table vs the headers |
| 511 | */ |
| 512 | if (ACPI_EDGE_SENSITIVE == linked_list->data.extended_irq.edge_level) { |
| 513 | temp8 |= 0x2; |
| 514 | } |
| 515 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 516 | /* Set the Interrupt Polarity */ |
| 517 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | temp8 |= ((linked_list->data.extended_irq.active_high_low & 0x1) << 2); |
| 519 | |
| 520 | *buffer = temp8; |
| 521 | buffer += 1; |
| 522 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 523 | /* Set the Interrupt table length */ |
| 524 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | temp8 = (u8) linked_list->data.extended_irq.number_of_interrupts; |
| 526 | |
| 527 | *buffer = temp8; |
| 528 | buffer += 1; |
| 529 | |
| 530 | for (index = 0; index < linked_list->data.extended_irq.number_of_interrupts; |
| 531 | index++) { |
| 532 | ACPI_MOVE_32_TO_32 (buffer, |
| 533 | &linked_list->data.extended_irq.interrupts[index]); |
| 534 | buffer += 4; |
| 535 | } |
| 536 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 537 | /* Resource Source Index and Resource Source are optional */ |
| 538 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | if (0 != linked_list->data.extended_irq.resource_source.string_length) { |
| 540 | *buffer = (u8) linked_list->data.extended_irq.resource_source.index; |
| 541 | buffer += 1; |
| 542 | |
| 543 | temp_pointer = (char *) buffer; |
| 544 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 545 | /* Copy the string */ |
| 546 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | ACPI_STRCPY (temp_pointer, |
| 548 | linked_list->data.extended_irq.resource_source.string_ptr); |
| 549 | |
| 550 | /* |
| 551 | * Buffer needs to be set to the length of the sting + one for the |
| 552 | * terminating null |
| 553 | */ |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 554 | buffer += (acpi_size) (ACPI_STRLEN ( |
| 555 | linked_list->data.extended_irq.resource_source.string_ptr) + 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | } |
| 557 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 558 | /* Return the number of bytes consumed in this operation */ |
| 559 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | *bytes_consumed = ACPI_PTR_DIFF (buffer, *output_buffer); |
| 561 | |
| 562 | /* |
| 563 | * Set the length field to the number of bytes consumed |
| 564 | * minus the header size (3 bytes) |
| 565 | */ |
| 566 | *length_field = (u16) (*bytes_consumed - 3); |
| 567 | return_ACPI_STATUS (AE_OK); |
| 568 | } |
| 569 | |