sys/dev/acpica5/acpi_resource.c

   1 /*-
   2  * Copyright (c) 2000 Michael Smith
   3  * Copyright (c) 2000 BSDi
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  *
  27  * $FreeBSD: src/sys/dev/acpica/acpi_resource.c,v 1.24 2004/05/30 20:08:23 phk Exp $
  28  * $DragonFly: src/sys/dev/acpica5/acpi_resource.c,v 1.3 2004/07/05 00:07:35 dillon Exp $
  29  */
  30
  31 #include "opt_acpi.h"
  32 #include <sys/param.h>
  33 #include <sys/kernel.h>
  34 #include <sys/bus.h>
  35 #include <sys/module.h>
  36
  37 #include <machine/bus.h>
  38 #include <machine/resource.h>
  39 #include <sys/rman.h>
  40
  41 #include "acpi.h"
  42 #include <dev/acpica5/acpivar.h>
  43
  44 /* Hooks for the ACPI CA debugging infrastructure */
  45 #define _COMPONENT      ACPI_BUS
  46 ACPI_MODULE_NAME("RESOURCE")
  47
  48 /*
  49  * Fetch a device's resources and associate them with the device.
  50  *
  51  * Note that it might be nice to also locate ACPI-specific resource items, such
  52  * as GPE bits.
  53  *
  54  * We really need to split the resource-fetching code out from the
  55  * resource-parsing code, since we may want to use the parsing
  56  * code for _PRS someday.
  57  */
  58 ACPI_STATUS
  59 acpi_parse_resources(device_t dev, ACPI_HANDLE handle,
  60                      struct acpi_parse_resource_set *set, void *arg)
  61 {
  62     ACPI_BUFFER         buf;
  63     ACPI_RESOURCE       *res;
  64     char                *curr, *last;
  65     ACPI_STATUS         status;
  66     void                *context;
  67
  68     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  69
  70     /*
  71      * Special-case some devices that abuse _PRS/_CRS to mean
  72      * something other than "I consume this resource".
  73      *
  74      * XXX do we really need this?  It's only relevant once
  75      *     we start always-allocating these resources, and even
  76      *     then, the only special-cased device is likely to be
  77      *     the PCI interrupt link.
  78      */
  79
  80     /* Fetch the device's current resources. */
  81     buf.Length = ACPI_ALLOCATE_BUFFER;
  82     if (ACPI_FAILURE((status = AcpiGetCurrentResources(handle, &buf)))) {
  83         if (status != AE_NOT_FOUND)
  84             printf("can't fetch resources for %s - %s\n",
  85                    acpi_name(handle), AcpiFormatException(status));
  86         return_ACPI_STATUS (status);
  87     }
  88     ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "%s - got %ld bytes of resources\n",
  89                      acpi_name(handle), (long)buf.Length));
  90     set->set_init(dev, arg, &context);
  91
  92     /* Iterate through the resources */
  93     curr = buf.Pointer;
  94     last = (char *)buf.Pointer + buf.Length;
  95     while (curr < last) {
  96         res = (ACPI_RESOURCE *)curr;
  97         curr += res->Length;
  98
  99         /* Handle the individual resource types */
 100         switch(res->Id) {
 101         case ACPI_RSTYPE_END_TAG:
 102             ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "EndTag\n"));
 103             curr = last;
 104             break;
 105         case ACPI_RSTYPE_FIXED_IO:
 106             if (res->Data.FixedIo.RangeLength <= 0)
 107                 break;
 108             ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "FixedIo 0x%x/%d\n",
 109                              res->Data.FixedIo.BaseAddress,
 110                              res->Data.FixedIo.RangeLength));
 111             set->set_ioport(dev, context,
 112                             res->Data.FixedIo.BaseAddress,
 113                             res->Data.FixedIo.RangeLength);
 114             break;
 115         case ACPI_RSTYPE_IO:
 116             if (res->Data.Io.RangeLength <= 0)
 117                 break;
 118             if (res->Data.Io.MinBaseAddress == res->Data.Io.MaxBaseAddress) {
 119                 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "Io 0x%x/%d\n",
 120                                  res->Data.Io.MinBaseAddress,
 121                                  res->Data.Io.RangeLength));
 122                 set->set_ioport(dev, context,
 123                                 res->Data.Io.MinBaseAddress,
 124                                 res->Data.Io.RangeLength);
 125             } else {
 126                 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "Io 0x%x-0x%x/%d\n",
 127                                  res->Data.Io.MinBaseAddress,
 128                                  res->Data.Io.MaxBaseAddress,
 129                                  res->Data.Io.RangeLength));
 130                 set->set_iorange(dev, context,
 131                                  res->Data.Io.MinBaseAddress,
 132                                  res->Data.Io.MaxBaseAddress,
 133                                  res->Data.Io.RangeLength,
 134                                  res->Data.Io.Alignment);
 135             }
 136             break;
 137         case ACPI_RSTYPE_FIXED_MEM32:
 138             if (res->Data.FixedMemory32.RangeLength <= 0)
 139                 break;
 140             ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "FixedMemory32 0x%x/%d\n",
 141                               res->Data.FixedMemory32.RangeBaseAddress,
 142                               res->Data.FixedMemory32.RangeLength));
 143             set->set_memory(dev, context,
 144                             res->Data.FixedMemory32.RangeBaseAddress,
 145                             res->Data.FixedMemory32.RangeLength);
 146             break;
 147         case ACPI_RSTYPE_MEM32:
 148             if (res->Data.Memory32.RangeLength <= 0)
 149                 break;
 150             if (res->Data.Memory32.MinBaseAddress ==
 151                 res->Data.Memory32.MaxBaseAddress) {
 152
 153                 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "Memory32 0x%x/%d\n",
 154                                   res->Data.Memory32.MinBaseAddress,
 155                                   res->Data.Memory32.RangeLength));
 156                 set->set_memory(dev, context,
 157                                 res->Data.Memory32.MinBaseAddress,
 158                                 res->Data.Memory32.RangeLength);
 159             } else {
 160                 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "Memory32 0x%x-0x%x/%d\n",
 161                                  res->Data.Memory32.MinBaseAddress,
 162                                  res->Data.Memory32.MaxBaseAddress,
 163                                  res->Data.Memory32.RangeLength));
 164                 set->set_memoryrange(dev, context,
 165                                      res->Data.Memory32.MinBaseAddress,
 166                                      res->Data.Memory32.MaxBaseAddress,
 167                                      res->Data.Memory32.RangeLength,
 168                                      res->Data.Memory32.Alignment);
 169             }
 170             break;
 171         case ACPI_RSTYPE_MEM24:
 172             if (res->Data.Memory24.RangeLength <= 0)
 173                 break;
 174             if (res->Data.Memory24.MinBaseAddress ==
 175                 res->Data.Memory24.MaxBaseAddress) {
 176
 177                 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "Memory24 0x%x/%d\n",
 178                                  res->Data.Memory24.MinBaseAddress,
 179                                  res->Data.Memory24.RangeLength));
 180                 set->set_memory(dev, context, res->Data.Memory24.MinBaseAddress,
 181                                 res->Data.Memory24.RangeLength);
 182             } else {
 183                 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "Memory24 0x%x-0x%x/%d\n",
 184                                  res->Data.Memory24.MinBaseAddress,
 185                                  res->Data.Memory24.MaxBaseAddress,
 186                                  res->Data.Memory24.RangeLength));
 187                 set->set_memoryrange(dev, context,
 188                                      res->Data.Memory24.MinBaseAddress,
 189                                      res->Data.Memory24.MaxBaseAddress,
 190                                      res->Data.Memory24.RangeLength,
 191                                      res->Data.Memory24.Alignment);
 192             }
 193             break;
 194         case ACPI_RSTYPE_IRQ:
 195             /*
 196              * from 1.0b 6.4.2
 197              * "This structure is repeated for each separate interrupt
 198              * required"
 199              */
 200             set->set_irq(dev, context, res->Data.Irq.Interrupts,
 201                 res->Data.Irq.NumberOfInterrupts, res->Data.Irq.EdgeLevel,
 202                 res->Data.Irq.ActiveHighLow);
 203             break;
 204         case ACPI_RSTYPE_DMA:
 205             /*
 206              * from 1.0b 6.4.3
 207              * "This structure is repeated for each separate dma channel
 208              * required"
 209              */
 210             set->set_drq(dev, context, res->Data.Dma.Channels,
 211                          res->Data.Dma.NumberOfChannels);
 212             break;
 213         case ACPI_RSTYPE_START_DPF:
 214             ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "start dependant functions\n"));
 215             set->set_start_dependant(dev, context,
 216                                      res->Data.StartDpf.CompatibilityPriority);
 217             break;
 218         case ACPI_RSTYPE_END_DPF:
 219             ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "end dependant functions\n"));
 220             set->set_end_dependant(dev, context);
 221             break;
 222         case ACPI_RSTYPE_ADDRESS32:
 223             if (res->Data.Address32.AddressLength <= 0)
 224                 break;
 225             if (res->Data.Address32.ProducerConsumer != ACPI_CONSUMER) {
 226                 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
 227                     "ignored Address32 %s producer\n",
 228                     res->Data.Address32.ResourceType == ACPI_IO_RANGE ?
 229                     "IO" : "Memory"));
 230                 break;
 231             }
 232             if (res->Data.Address32.ResourceType != ACPI_MEMORY_RANGE &&
 233                 res->Data.Address32.ResourceType != ACPI_IO_RANGE) {
 234                 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
 235                     "ignored Address32 for non-memory, non-I/O\n"));
 236                 break;
 237             }
 238
 239             if (res->Data.Address32.MinAddressFixed == ACPI_ADDRESS_FIXED &&
 240                 res->Data.Address32.MaxAddressFixed == ACPI_ADDRESS_FIXED) {
 241
 242                 if (res->Data.Address32.ResourceType == ACPI_MEMORY_RANGE) {
 243                     ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
 244                                      "Address32/Memory 0x%x/%d\n",
 245                                      res->Data.Address32.MinAddressRange,
 246                                      res->Data.Address32.AddressLength));
 247                     set->set_memory(dev, context,
 248                                     res->Data.Address32.MinAddressRange,
 249                                     res->Data.Address32.AddressLength);
 250                 } else {
 251                     ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
 252                                      "Address32/IO 0x%x/%d\n",
 253                                      res->Data.Address32.MinAddressRange,
 254                                      res->Data.Address32.AddressLength));
 255                     set->set_ioport(dev, context,
 256                                     res->Data.Address32.MinAddressRange,
 257                                     res->Data.Address32.AddressLength);
 258                 }
 259             } else {
 260                 if (res->Data.Address32.ResourceType == ACPI_MEMORY_RANGE) {
 261                     ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
 262                                      "Address32/Memory 0x%x-0x%x/%d\n",
 263                                      res->Data.Address32.MinAddressRange,
 264                                      res->Data.Address32.MaxAddressRange,
 265                                      res->Data.Address32.AddressLength));
 266                     set->set_memoryrange(dev, context,
 267                                           res->Data.Address32.MinAddressRange,
 268                                           res->Data.Address32.MaxAddressRange,
 269                                           res->Data.Address32.AddressLength,
 270                                           res->Data.Address32.Granularity);
 271                 } else {
 272                     ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
 273                                      "Address32/IO 0x%x-0x%x/%d\n",
 274                                      res->Data.Address32.MinAddressRange,
 275                                      res->Data.Address32.MaxAddressRange,
 276                                      res->Data.Address32.AddressLength));
 277                     set->set_iorange(dev, context,
 278                                      res->Data.Address32.MinAddressRange,
 279                                      res->Data.Address32.MaxAddressRange,
 280                                      res->Data.Address32.AddressLength,
 281                                      res->Data.Address32.Granularity);
 282                 }
 283             }
 284             break;
 285         case ACPI_RSTYPE_ADDRESS16:
 286             if (res->Data.Address16.AddressLength <= 0)
 287                 break;
 288             if (res->Data.Address16.ProducerConsumer != ACPI_CONSUMER) {
 289                 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
 290                     "ignored Address16 %s producer\n",
 291                     res->Data.Address16.ResourceType == ACPI_IO_RANGE ?
 292                     "IO" : "Memory"));
 293                 break;
 294             }
 295             if (res->Data.Address16.ResourceType != ACPI_MEMORY_RANGE &&
 296                 res->Data.Address16.ResourceType != ACPI_IO_RANGE) {
 297                 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
 298                         "ignored Address16 for non-memory, non-I/O\n"));
 299                 break;
 300             }
 301
 302             if (res->Data.Address16.MinAddressFixed == ACPI_ADDRESS_FIXED &&
 303                 res->Data.Address16.MaxAddressFixed == ACPI_ADDRESS_FIXED) {
 304
 305                 if (res->Data.Address16.ResourceType == ACPI_MEMORY_RANGE) {
 306                     ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
 307                                      "Address16/Memory 0x%x/%d\n",
 308                                      res->Data.Address16.MinAddressRange,
 309                                      res->Data.Address16.AddressLength));
 310                     set->set_memory(dev, context,
 311                                     res->Data.Address16.MinAddressRange,
 312                                     res->Data.Address16.AddressLength);
 313                 } else {
 314                     ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
 315                                      "Address16/IO 0x%x/%d\n",
 316                                      res->Data.Address16.MinAddressRange,
 317                                      res->Data.Address16.AddressLength));
 318                     set->set_ioport(dev, context,
 319                                     res->Data.Address16.MinAddressRange,
 320                                     res->Data.Address16.AddressLength);
 321                 }
 322             } else {
 323                 if (res->Data.Address16.ResourceType == ACPI_MEMORY_RANGE) {
 324                     ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
 325                                      "Address16/Memory 0x%x-0x%x/%d\n",
 326                                      res->Data.Address16.MinAddressRange,
 327                                      res->Data.Address16.MaxAddressRange,
 328                                      res->Data.Address16.AddressLength));
 329                     set->set_memoryrange(dev, context,
 330                                           res->Data.Address16.MinAddressRange,
 331                                           res->Data.Address16.MaxAddressRange,
 332                                           res->Data.Address16.AddressLength,
 333                                           res->Data.Address16.Granularity);
 334                 } else {
 335                     ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
 336                                      "Address16/IO 0x%x-0x%x/%d\n",
 337                                      res->Data.Address16.MinAddressRange,
 338                                      res->Data.Address16.MaxAddressRange,
 339                                      res->Data.Address16.AddressLength));
 340                     set->set_iorange(dev, context,
 341                                      res->Data.Address16.MinAddressRange,
 342                                      res->Data.Address16.MaxAddressRange,
 343                                      res->Data.Address16.AddressLength,
 344                                      res->Data.Address16.Granularity);
 345                 }
 346             }
 347             break;
 348         case ACPI_RSTYPE_ADDRESS64:
 349             ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
 350                              "unimplemented Address64 resource\n"));
 351             break;
 352         case ACPI_RSTYPE_EXT_IRQ:
 353             /* XXX special handling? */
 354             set->set_irq(dev, context,res->Data.ExtendedIrq.Interrupts,
 355                 res->Data.ExtendedIrq.NumberOfInterrupts,
 356                 res->Data.ExtendedIrq.EdgeLevel,
 357                 res->Data.ExtendedIrq.ActiveHighLow);
 358             break;
 359         case ACPI_RSTYPE_VENDOR:
 360             ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
 361                              "unimplemented VendorSpecific resource\n"));
 362             break;
 363         default:
 364             break;
 365         }
 366     }
 367
 368     AcpiOsFree(buf.Pointer);
 369     set->set_done(dev, context);
 370     return_ACPI_STATUS (AE_OK);
 371 }
 372
 373 /*
 374  * Resource-set vectors used to attach _CRS-derived resources
 375  * to an ACPI device.
 376  */
 377 static void     acpi_res_set_init(device_t dev, void *arg, void **context);
 378 static void     acpi_res_set_done(device_t dev, void *context);
 379 static void     acpi_res_set_ioport(device_t dev, void *context,
 380                                     u_int32_t base, u_int32_t length);
 381 static void     acpi_res_set_iorange(device_t dev, void *context,
 382                                      u_int32_t low, u_int32_t high,
 383                                      u_int32_t length, u_int32_t align);
 384 static void     acpi_res_set_memory(device_t dev, void *context,
 385                                     u_int32_t base, u_int32_t length);
 386 static void     acpi_res_set_memoryrange(device_t dev, void *context,
 387                                          u_int32_t low, u_int32_t high,
 388                                          u_int32_t length, u_int32_t align);
 389 static void     acpi_res_set_irq(device_t dev, void *context, u_int32_t *irq,
 390                                  int count, int trig, int pol);
 391 static void     acpi_res_set_drq(device_t dev, void *context, u_int32_t *drq,
 392                                  int count);
 393 static void     acpi_res_set_start_dependant(device_t dev, void *context,
 394                                              int preference);
 395 static void     acpi_res_set_end_dependant(device_t dev, void *context);
 396
 397 struct acpi_parse_resource_set acpi_res_parse_set = {
 398     acpi_res_set_init,
 399     acpi_res_set_done,
 400     acpi_res_set_ioport,
 401     acpi_res_set_iorange,
 402     acpi_res_set_memory,
 403     acpi_res_set_memoryrange,
 404     acpi_res_set_irq,
 405     acpi_res_set_drq,
 406     acpi_res_set_start_dependant,
 407     acpi_res_set_end_dependant
 408 };
 409
 410 struct acpi_res_context {
 411     int         ar_nio;
 412     int         ar_nmem;
 413     int         ar_nirq;
 414     int         ar_ndrq;
 415     void        *ar_parent;
 416 };
 417
 418 static void
 419 acpi_res_set_init(device_t dev, void *arg, void **context)
 420 {
 421     struct acpi_res_context     *cp;
 422
 423     if ((cp = AcpiOsAllocate(sizeof(*cp))) != NULL) {
 424         bzero(cp, sizeof(*cp));
 425         cp->ar_parent = arg;
 426         *context = cp;
 427     }
 428 }
 429
 430 static void
 431 acpi_res_set_done(device_t dev, void *context)
 432 {
 433     struct acpi_res_context     *cp = (struct acpi_res_context *)context;
 434
 435     if (cp == NULL)
 436         return;
 437     AcpiOsFree(cp);
 438 }
 439
 440 static void
 441 acpi_res_set_ioport(device_t dev, void *context, u_int32_t base,
 442                     u_int32_t length)
 443 {
 444     struct acpi_res_context     *cp = (struct acpi_res_context *)context;
 445
 446     if (cp == NULL)
 447         return;
 448     bus_set_resource(dev, SYS_RES_IOPORT, cp->ar_nio++, base, length);
 449 }
 450
 451 static void
 452 acpi_res_set_iorange(device_t dev, void *context, u_int32_t low,
 453                      u_int32_t high, u_int32_t length, u_int32_t align)
 454 {
 455     struct acpi_res_context     *cp = (struct acpi_res_context *)context;
 456
 457     if (cp == NULL)
 458         return;
 459     device_printf(dev, "I/O range not supported\n");
 460 }
 461
 462 static void
 463 acpi_res_set_memory(device_t dev, void *context, u_int32_t base,
 464                     u_int32_t length)
 465 {
 466     struct acpi_res_context     *cp = (struct acpi_res_context *)context;
 467
 468     if (cp == NULL)
 469         return;
 470
 471     bus_set_resource(dev, SYS_RES_MEMORY, cp->ar_nmem++, base, length);
 472 }
 473
 474 static void
 475 acpi_res_set_memoryrange(device_t dev, void *context, u_int32_t low,
 476                          u_int32_t high, u_int32_t length, u_int32_t align)
 477 {
 478     struct acpi_res_context     *cp = (struct acpi_res_context *)context;
 479
 480     if (cp == NULL)
 481         return;
 482     device_printf(dev, "memory range not supported\n");
 483 }
 484
 485 static void
 486 acpi_res_set_irq(device_t dev, void *context, u_int32_t *irq, int count,
 487     int trig, int pol)
 488 {
 489     struct acpi_res_context     *cp = (struct acpi_res_context *)context;
 490
 491     if (cp == NULL || irq == NULL)
 492         return;
 493
 494     /* This implements no resource relocation. */
 495     if (count != 1)
 496         return;
 497
 498     bus_set_resource(dev, SYS_RES_IRQ, cp->ar_nirq++, *irq, 1);
 499 #if 0   /* From FreeBSD-5 XXX */
 500     BUS_CONFIG_INTR(dev, *irq, (trig == ACPI_EDGE_SENSITIVE) ?
 501         INTR_TRIGGER_EDGE : INTR_TRIGGER_LEVEL, (pol == ACPI_ACTIVE_HIGH) ?
 502         INTR_POLARITY_HIGH : INTR_POLARITY_LOW);
 503 #endif
 504 }
 505
 506 static void
 507 acpi_res_set_drq(device_t dev, void *context, u_int32_t *drq, int count)
 508 {
 509     struct acpi_res_context     *cp = (struct acpi_res_context *)context;
 510
 511     if (cp == NULL || drq == NULL)
 512         return;
 513
 514     /* This implements no resource relocation. */
 515     if (count != 1)
 516         return;
 517
 518     bus_set_resource(dev, SYS_RES_DRQ, cp->ar_ndrq++, *drq, 1);
 519 }
 520
 521 static void
 522 acpi_res_set_start_dependant(device_t dev, void *context, int preference)
 523 {
 524     struct acpi_res_context     *cp = (struct acpi_res_context *)context;
 525
 526     if (cp == NULL)
 527         return;
 528     device_printf(dev, "dependant functions not supported\n");
 529 }
 530
 531 static void
 532 acpi_res_set_end_dependant(device_t dev, void *context)
 533 {
 534     struct acpi_res_context     *cp = (struct acpi_res_context *)context;
 535
 536     if (cp == NULL)
 537         return;
 538     device_printf(dev, "dependant functions not supported\n");
 539 }
 540
 541 /*
 542  * Resource-owning placeholders.
 543  *
 544  * This code "owns" system resource objects that aren't
 545  * otherwise useful to devices, and which shouldn't be
 546  * considered "free".
 547  *
 548  * Note that some systems claim *all* of the physical address space
 549  * with a PNP0C01 device, so we cannot correctly "own" system memory
 550  * here (must be done in the SMAP handler on x86 systems, for
 551  * example).
 552  */
 553
 554 static int      acpi_sysresource_probe(device_t dev);
 555 static int      acpi_sysresource_attach(device_t dev);
 556
 557 static device_method_t acpi_sysresource_methods[] = {
 558     /* Device interface */
 559     DEVMETHOD(device_probe,     acpi_sysresource_probe),
 560     DEVMETHOD(device_attach,    acpi_sysresource_attach),
 561
 562     {0, 0}
 563 };
 564
 565 static driver_t acpi_sysresource_driver = {
 566     "acpi_sysresource",
 567     acpi_sysresource_methods,
 568     0,
 569 };
 570
 571 static devclass_t acpi_sysresource_devclass;
 572 DRIVER_MODULE(acpi_sysresource, acpi, acpi_sysresource_driver,
 573               acpi_sysresource_devclass, 0, 0);
 574 MODULE_DEPEND(acpi_sysresource, acpi, 1, 1, 1);
 575
 576 static int
 577 acpi_sysresource_probe(device_t dev)
 578 {
 579     if (!acpi_disabled("sysresource") && acpi_MatchHid(dev, "PNP0C02"))
 580         device_set_desc(dev, "System Resource");
 581     else
 582         return (ENXIO);
 583
 584     device_quiet(dev);
 585     return (-100);
 586 }
 587
 588 static int
 589 acpi_sysresource_attach(device_t dev)
 590 {
 591     struct resource     *res;
 592     int                 i, rid;
 593
 594     /*
 595      * Suck up all the resources that might have been assigned to us.
 596      * Note that it's impossible to tell the difference between a
 597      * resource that someone else has claimed, and one that doesn't
 598      * exist.
 599      */
 600     for (i = 0; i < 100; i++) {
 601         rid = i;
 602         res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, 0);
 603         rid = i;
 604         res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 0);
 605         rid = i;
 606         res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_SHAREABLE);
 607     }
 608
 609     return (0);
 610 }