drivers/pnp/resource.c

   1 /*
   2  * resource.c - Contains functions for registering and analyzing resource information
   3  *
   4  * based on isapnp.c resource management (c) Jaroslav Kysela <perex@perex.cz>
   5  * Copyright 2003 Adam Belay <ambx1@neo.rr.com>
   6  * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
   7  *      Bjorn Helgaas <bjorn.helgaas@hp.com>
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/slab.h>
  12 #include <linux/errno.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/kernel.h>
  15 #include <asm/io.h>
  16 #include <asm/dma.h>
  17 #include <asm/irq.h>
  18 #include <linux/pci.h>
  19 #include <linux/ioport.h>
  20 #include <linux/init.h>
  21
  22 #include <linux/pnp.h>
  23 #include "base.h"
  24
  25 static int pnp_reserve_irq[16] = {[0 ... 15] = -1 };    /* reserve (don't use) some IRQ */
  26 static int pnp_reserve_dma[8] = {[0 ... 7] = -1 };      /* reserve (don't use) some DMA */
  27 static int pnp_reserve_io[16] = {[0 ... 15] = -1 };     /* reserve (don't use) some I/O region */
  28 static int pnp_reserve_mem[16] = {[0 ... 15] = -1 };    /* reserve (don't use) some memory region */
  29
  30 /*
  31  * option registration
  32  */
  33
  34 static struct pnp_option *pnp_build_option(struct pnp_dev *dev, unsigned long type,
  35                                     unsigned int option_flags)
  36 {
  37         struct pnp_option *option;
  38
  39         option = kzalloc(sizeof(struct pnp_option), GFP_KERNEL);
  40         if (!option)
  41                 return NULL;
  42
  43         option->flags = option_flags;
  44         option->type = type;
  45
  46         list_add_tail(&option->list, &dev->options);
  47         return option;
  48 }
  49
  50 int pnp_register_irq_resource(struct pnp_dev *dev, unsigned int option_flags,
  51                               pnp_irq_mask_t *map, unsigned char flags)
  52 {
  53         struct pnp_option *option;
  54         struct pnp_irq *irq;
  55
  56         option = pnp_build_option(dev, IORESOURCE_IRQ, option_flags);
  57         if (!option)
  58                 return -ENOMEM;
  59
  60         irq = &option->u.irq;
  61         irq->map = *map;
  62         irq->flags = flags;
  63
  64 #ifdef CONFIG_PCI
  65         {
  66                 int i;
  67
  68                 for (i = 0; i < 16; i++)
  69                         if (test_bit(i, irq->map.bits))
  70                                 pcibios_penalize_isa_irq(i, 0);
  71         }
  72 #endif
  73
  74         dbg_pnp_show_option(dev, option);
  75         return 0;
  76 }
  77
  78 int pnp_register_dma_resource(struct pnp_dev *dev, unsigned int option_flags,
  79                               unsigned char map, unsigned char flags)
  80 {
  81         struct pnp_option *option;
  82         struct pnp_dma *dma;
  83
  84         option = pnp_build_option(dev, IORESOURCE_DMA, option_flags);
  85         if (!option)
  86                 return -ENOMEM;
  87
  88         dma = &option->u.dma;
  89         dma->map = map;
  90         dma->flags = flags;
  91
  92         dbg_pnp_show_option(dev, option);
  93         return 0;
  94 }
  95
  96 int pnp_register_port_resource(struct pnp_dev *dev, unsigned int option_flags,
  97                                resource_size_t min, resource_size_t max,
  98                                resource_size_t align, resource_size_t size,
  99                                unsigned char flags)
 100 {
 101         struct pnp_option *option;
 102         struct pnp_port *port;
 103
 104         option = pnp_build_option(dev, IORESOURCE_IO, option_flags);
 105         if (!option)
 106                 return -ENOMEM;
 107
 108         port = &option->u.port;
 109         port->min = min;
 110         port->max = max;
 111         port->align = align;
 112         port->size = size;
 113         port->flags = flags;
 114
 115         dbg_pnp_show_option(dev, option);
 116         return 0;
 117 }
 118
 119 int pnp_register_mem_resource(struct pnp_dev *dev, unsigned int option_flags,
 120                               resource_size_t min, resource_size_t max,
 121                               resource_size_t align, resource_size_t size,
 122                               unsigned char flags)
 123 {
 124         struct pnp_option *option;
 125         struct pnp_mem *mem;
 126
 127         option = pnp_build_option(dev, IORESOURCE_MEM, option_flags);
 128         if (!option)
 129                 return -ENOMEM;
 130
 131         mem = &option->u.mem;
 132         mem->min = min;
 133         mem->max = max;
 134         mem->align = align;
 135         mem->size = size;
 136         mem->flags = flags;
 137
 138         dbg_pnp_show_option(dev, option);
 139         return 0;
 140 }
 141
 142 void pnp_free_options(struct pnp_dev *dev)
 143 {
 144         struct pnp_option *option, *tmp;
 145
 146         list_for_each_entry_safe(option, tmp, &dev->options, list) {
 147                 list_del(&option->list);
 148                 kfree(option);
 149         }
 150 }
 151
 152 /*
 153  * resource validity checking
 154  */
 155
 156 #define length(start, end) (*(end) - *(start) + 1)
 157
 158 /* Two ranges conflict if one doesn't end before the other starts */
 159 #define ranged_conflict(starta, enda, startb, endb) \
 160         !((*(enda) < *(startb)) || (*(endb) < *(starta)))
 161
 162 #define cannot_compare(flags) \
 163 ((flags) & IORESOURCE_DISABLED)
 164
 165 int pnp_check_port(struct pnp_dev *dev, struct resource *res)
 166 {
 167         int i;
 168         struct pnp_dev *tdev;
 169         struct resource *tres;
 170         resource_size_t *port, *end, *tport, *tend;
 171
 172         port = &res->start;
 173         end = &res->end;
 174
 175         /* if the resource doesn't exist, don't complain about it */
 176         if (cannot_compare(res->flags))
 177                 return 1;
 178
 179         /* check if the resource is already in use, skip if the
 180          * device is active because it itself may be in use */
 181         if (!dev->active) {
 182                 if (!request_region(*port, length(port, end), "pnp"))
 183                         return 0;
 184                 release_region(*port, length(port, end));
 185         }
 186
 187         /* check if the resource is reserved */
 188         for (i = 0; i < 8; i++) {
 189                 int rport = pnp_reserve_io[i << 1];
 190                 int rend = pnp_reserve_io[(i << 1) + 1] + rport - 1;
 191                 if (ranged_conflict(port, end, &rport, &rend))
 192                         return 0;
 193         }
 194
 195         /* check for internal conflicts */
 196         for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_IO, i)); i++) {
 197                 if (tres != res && tres->flags & IORESOURCE_IO) {
 198                         tport = &tres->start;
 199                         tend = &tres->end;
 200                         if (ranged_conflict(port, end, tport, tend))
 201                                 return 0;
 202                 }
 203         }
 204
 205         /* check for conflicts with other pnp devices */
 206         pnp_for_each_dev(tdev) {
 207                 if (tdev == dev)
 208                         continue;
 209                 for (i = 0;
 210                      (tres = pnp_get_resource(tdev, IORESOURCE_IO, i));
 211                      i++) {
 212                         if (tres->flags & IORESOURCE_IO) {
 213                                 if (cannot_compare(tres->flags))
 214                                         continue;
 215                                 if (tres->flags & IORESOURCE_WINDOW)
 216                                         continue;
 217                                 tport = &tres->start;
 218                                 tend = &tres->end;
 219                                 if (ranged_conflict(port, end, tport, tend))
 220                                         return 0;
 221                         }
 222                 }
 223         }
 224
 225         return 1;
 226 }
 227
 228 int pnp_check_mem(struct pnp_dev *dev, struct resource *res)
 229 {
 230         int i;
 231         struct pnp_dev *tdev;
 232         struct resource *tres;
 233         resource_size_t *addr, *end, *taddr, *tend;
 234
 235         addr = &res->start;
 236         end = &res->end;
 237
 238         /* if the resource doesn't exist, don't complain about it */
 239         if (cannot_compare(res->flags))
 240                 return 1;
 241
 242         /* check if the resource is already in use, skip if the
 243          * device is active because it itself may be in use */
 244         if (!dev->active) {
 245                 if (!request_mem_region(*addr, length(addr, end), "pnp"))
 246                         return 0;
 247                 release_mem_region(*addr, length(addr, end));
 248         }
 249
 250         /* check if the resource is reserved */
 251         for (i = 0; i < 8; i++) {
 252                 int raddr = pnp_reserve_mem[i << 1];
 253                 int rend = pnp_reserve_mem[(i << 1) + 1] + raddr - 1;
 254                 if (ranged_conflict(addr, end, &raddr, &rend))
 255                         return 0;
 256         }
 257
 258         /* check for internal conflicts */
 259         for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_MEM, i)); i++) {
 260                 if (tres != res && tres->flags & IORESOURCE_MEM) {
 261                         taddr = &tres->start;
 262                         tend = &tres->end;
 263                         if (ranged_conflict(addr, end, taddr, tend))
 264                                 return 0;
 265                 }
 266         }
 267
 268         /* check for conflicts with other pnp devices */
 269         pnp_for_each_dev(tdev) {
 270                 if (tdev == dev)
 271                         continue;
 272                 for (i = 0;
 273                      (tres = pnp_get_resource(tdev, IORESOURCE_MEM, i));
 274                      i++) {
 275                         if (tres->flags & IORESOURCE_MEM) {
 276                                 if (cannot_compare(tres->flags))
 277                                         continue;
 278                                 if (tres->flags & IORESOURCE_WINDOW)
 279                                         continue;
 280                                 taddr = &tres->start;
 281                                 tend = &tres->end;
 282                                 if (ranged_conflict(addr, end, taddr, tend))
 283                                         return 0;
 284                         }
 285                 }
 286         }
 287
 288         return 1;
 289 }
 290
 291 static irqreturn_t pnp_test_handler(int irq, void *dev_id)
 292 {
 293         return IRQ_HANDLED;
 294 }
 295
 296 #ifdef CONFIG_PCI
 297 static int pci_dev_uses_irq(struct pnp_dev *pnp, struct pci_dev *pci,
 298                             unsigned int irq)
 299 {
 300         u32 class;
 301         u8 progif;
 302
 303         if (pci->irq == irq) {
 304                 pnp_dbg(&pnp->dev, "  device %s using irq %d\n",
 305                         pci_name(pci), irq);
 306                 return 1;
 307         }
 308
 309         /*
 310          * See pci_setup_device() and ata_pci_sff_activate_host() for
 311          * similar IDE legacy detection.
 312          */
 313         pci_read_config_dword(pci, PCI_CLASS_REVISION, &class);
 314         class >>= 8;            /* discard revision ID */
 315         progif = class & 0xff;
 316         class >>= 8;
 317
 318         if (class == PCI_CLASS_STORAGE_IDE) {
 319                 /*
 320                  * Unless both channels are native-PCI mode only,
 321                  * treat the compatibility IRQs as busy.
 322                  */
 323                 if ((progif & 0x5) != 0x5)
 324                         if (pci_get_legacy_ide_irq(pci, 0) == irq ||
 325                             pci_get_legacy_ide_irq(pci, 1) == irq) {
 326                                 pnp_dbg(&pnp->dev, "  legacy IDE device %s "
 327                                         "using irq %d\n", pci_name(pci), irq);
 328                                 return 1;
 329                         }
 330         }
 331
 332         return 0;
 333 }
 334 #endif
 335
 336 static int pci_uses_irq(struct pnp_dev *pnp, unsigned int irq)
 337 {
 338 #ifdef CONFIG_PCI
 339         struct pci_dev *pci = NULL;
 340
 341         for_each_pci_dev(pci) {
 342                 if (pci_dev_uses_irq(pnp, pci, irq)) {
 343                         pci_dev_put(pci);
 344                         return 1;
 345                 }
 346         }
 347 #endif
 348         return 0;
 349 }
 350
 351 int pnp_check_irq(struct pnp_dev *dev, struct resource *res)
 352 {
 353         int i;
 354         struct pnp_dev *tdev;
 355         struct resource *tres;
 356         resource_size_t *irq;
 357
 358         irq = &res->start;
 359
 360         /* if the resource doesn't exist, don't complain about it */
 361         if (cannot_compare(res->flags))
 362                 return 1;
 363
 364         /* check if the resource is valid */
 365         if (*irq > 15)
 366                 return 0;
 367
 368         /* check if the resource is reserved */
 369         for (i = 0; i < 16; i++) {
 370                 if (pnp_reserve_irq[i] == *irq)
 371                         return 0;
 372         }
 373
 374         /* check for internal conflicts */
 375         for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_IRQ, i)); i++) {
 376                 if (tres != res && tres->flags & IORESOURCE_IRQ) {
 377                         if (tres->start == *irq)
 378                                 return 0;
 379                 }
 380         }
 381
 382         /* check if the resource is being used by a pci device */
 383         if (pci_uses_irq(dev, *irq))
 384                 return 0;
 385
 386         /* check if the resource is already in use, skip if the
 387          * device is active because it itself may be in use */
 388         if (!dev->active) {
 389                 if (request_irq(*irq, pnp_test_handler,
 390                                 IRQF_PROBE_SHARED, "pnp", NULL))
 391                         return 0;
 392                 free_irq(*irq, NULL);
 393         }
 394
 395         /* check for conflicts with other pnp devices */
 396         pnp_for_each_dev(tdev) {
 397                 if (tdev == dev)
 398                         continue;
 399                 for (i = 0;
 400                      (tres = pnp_get_resource(tdev, IORESOURCE_IRQ, i));
 401                      i++) {
 402                         if (tres->flags & IORESOURCE_IRQ) {
 403                                 if (cannot_compare(tres->flags))
 404                                         continue;
 405                                 if (tres->start == *irq)
 406                                         return 0;
 407                         }
 408                 }
 409         }
 410
 411         return 1;
 412 }
 413
 414 #ifdef CONFIG_ISA_DMA_API
 415 int pnp_check_dma(struct pnp_dev *dev, struct resource *res)
 416 {
 417         int i;
 418         struct pnp_dev *tdev;
 419         struct resource *tres;
 420         resource_size_t *dma;
 421
 422         dma = &res->start;
 423
 424         /* if the resource doesn't exist, don't complain about it */
 425         if (cannot_compare(res->flags))
 426                 return 1;
 427
 428         /* check if the resource is valid */
 429         if (*dma == 4 || *dma > 7)
 430                 return 0;
 431
 432         /* check if the resource is reserved */
 433         for (i = 0; i < 8; i++) {
 434                 if (pnp_reserve_dma[i] == *dma)
 435                         return 0;
 436         }
 437
 438         /* check for internal conflicts */
 439         for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_DMA, i)); i++) {
 440                 if (tres != res && tres->flags & IORESOURCE_DMA) {
 441                         if (tres->start == *dma)
 442                                 return 0;
 443                 }
 444         }
 445
 446         /* check if the resource is already in use, skip if the
 447          * device is active because it itself may be in use */
 448         if (!dev->active) {
 449                 if (request_dma(*dma, "pnp"))
 450                         return 0;
 451                 free_dma(*dma);
 452         }
 453
 454         /* check for conflicts with other pnp devices */
 455         pnp_for_each_dev(tdev) {
 456                 if (tdev == dev)
 457                         continue;
 458                 for (i = 0;
 459                      (tres = pnp_get_resource(tdev, IORESOURCE_DMA, i));
 460                      i++) {
 461                         if (tres->flags & IORESOURCE_DMA) {
 462                                 if (cannot_compare(tres->flags))
 463                                         continue;
 464                                 if (tres->start == *dma)
 465                                         return 0;
 466                         }
 467                 }
 468         }
 469
 470         return 1;
 471 }
 472 #endif /* CONFIG_ISA_DMA_API */
 473
 474 unsigned long pnp_resource_type(struct resource *res)
 475 {
 476         return res->flags & (IORESOURCE_IO  | IORESOURCE_MEM |
 477                              IORESOURCE_IRQ | IORESOURCE_DMA |
 478                              IORESOURCE_BUS);
 479 }
 480
 481 struct resource *pnp_get_resource(struct pnp_dev *dev,
 482                                   unsigned long type, unsigned int num)
 483 {
 484         struct pnp_resource *pnp_res;
 485         struct resource *res;
 486
 487         list_for_each_entry(pnp_res, &dev->resources, list) {
 488                 res = &pnp_res->res;
 489                 if (pnp_resource_type(res) == type && num-- == 0)
 490                         return res;
 491         }
 492         return NULL;
 493 }
 494 EXPORT_SYMBOL(pnp_get_resource);
 495
 496 static struct pnp_resource *pnp_new_resource(struct pnp_dev *dev)
 497 {
 498         struct pnp_resource *pnp_res;
 499
 500         pnp_res = kzalloc(sizeof(struct pnp_resource), GFP_KERNEL);
 501         if (!pnp_res)
 502                 return NULL;
 503
 504         list_add_tail(&pnp_res->list, &dev->resources);
 505         return pnp_res;
 506 }
 507
 508 struct pnp_resource *pnp_add_resource(struct pnp_dev *dev,
 509                                       struct resource *res)
 510 {
 511         struct pnp_resource *pnp_res;
 512
 513         pnp_res = pnp_new_resource(dev);
 514         if (!pnp_res) {
 515                 dev_err(&dev->dev, "can't add resource %pR\n", res);
 516                 return NULL;
 517         }
 518
 519         pnp_res->res = *res;
 520         pnp_res->res.name = dev->name;
 521         dev_dbg(&dev->dev, "%pR\n", res);
 522         return pnp_res;
 523 }
 524
 525 struct pnp_resource *pnp_add_irq_resource(struct pnp_dev *dev, int irq,
 526                                           int flags)
 527 {
 528         struct pnp_resource *pnp_res;
 529         struct resource *res;
 530
 531         pnp_res = pnp_new_resource(dev);
 532         if (!pnp_res) {
 533                 dev_err(&dev->dev, "can't add resource for IRQ %d\n", irq);
 534                 return NULL;
 535         }
 536
 537         res = &pnp_res->res;
 538         res->flags = IORESOURCE_IRQ | flags;
 539         res->start = irq;
 540         res->end = irq;
 541
 542         dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
 543         return pnp_res;
 544 }
 545
 546 struct pnp_resource *pnp_add_dma_resource(struct pnp_dev *dev, int dma,
 547                                           int flags)
 548 {
 549         struct pnp_resource *pnp_res;
 550         struct resource *res;
 551
 552         pnp_res = pnp_new_resource(dev);
 553         if (!pnp_res) {
 554                 dev_err(&dev->dev, "can't add resource for DMA %d\n", dma);
 555                 return NULL;
 556         }
 557
 558         res = &pnp_res->res;
 559         res->flags = IORESOURCE_DMA | flags;
 560         res->start = dma;
 561         res->end = dma;
 562
 563         dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
 564         return pnp_res;
 565 }
 566
 567 struct pnp_resource *pnp_add_io_resource(struct pnp_dev *dev,
 568                                          resource_size_t start,
 569                                          resource_size_t end, int flags)
 570 {
 571         struct pnp_resource *pnp_res;
 572         struct resource *res;
 573
 574         pnp_res = pnp_new_resource(dev);
 575         if (!pnp_res) {
 576                 dev_err(&dev->dev, "can't add resource for IO %#llx-%#llx\n",
 577                         (unsigned long long) start,
 578                         (unsigned long long) end);
 579                 return NULL;
 580         }
 581
 582         res = &pnp_res->res;
 583         res->flags = IORESOURCE_IO | flags;
 584         res->start = start;
 585         res->end = end;
 586
 587         dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
 588         return pnp_res;
 589 }
 590
 591 struct pnp_resource *pnp_add_mem_resource(struct pnp_dev *dev,
 592                                           resource_size_t start,
 593                                           resource_size_t end, int flags)
 594 {
 595         struct pnp_resource *pnp_res;
 596         struct resource *res;
 597
 598         pnp_res = pnp_new_resource(dev);
 599         if (!pnp_res) {
 600                 dev_err(&dev->dev, "can't add resource for MEM %#llx-%#llx\n",
 601                         (unsigned long long) start,
 602                         (unsigned long long) end);
 603                 return NULL;
 604         }
 605
 606         res = &pnp_res->res;
 607         res->flags = IORESOURCE_MEM | flags;
 608         res->start = start;
 609         res->end = end;
 610
 611         dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
 612         return pnp_res;
 613 }
 614
 615 struct pnp_resource *pnp_add_bus_resource(struct pnp_dev *dev,
 616                                           resource_size_t start,
 617                                           resource_size_t end)
 618 {
 619         struct pnp_resource *pnp_res;
 620         struct resource *res;
 621
 622         pnp_res = pnp_new_resource(dev);
 623         if (!pnp_res) {
 624                 dev_err(&dev->dev, "can't add resource for BUS %#llx-%#llx\n",
 625                         (unsigned long long) start,
 626                         (unsigned long long) end);
 627                 return NULL;
 628         }
 629
 630         res = &pnp_res->res;
 631         res->flags = IORESOURCE_BUS;
 632         res->start = start;
 633         res->end = end;
 634
 635         dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
 636         return pnp_res;
 637 }
 638
 639 /*
 640  * Determine whether the specified resource is a possible configuration
 641  * for this device.
 642  */
 643 int pnp_possible_config(struct pnp_dev *dev, int type, resource_size_t start,
 644                         resource_size_t size)
 645 {
 646         struct pnp_option *option;
 647         struct pnp_port *port;
 648         struct pnp_mem *mem;
 649         struct pnp_irq *irq;
 650         struct pnp_dma *dma;
 651
 652         list_for_each_entry(option, &dev->options, list) {
 653                 if (option->type != type)
 654                         continue;
 655
 656                 switch (option->type) {
 657                 case IORESOURCE_IO:
 658                         port = &option->u.port;
 659                         if (port->min == start && port->size == size)
 660                                 return 1;
 661                         break;
 662                 case IORESOURCE_MEM:
 663                         mem = &option->u.mem;
 664                         if (mem->min == start && mem->size == size)
 665                                 return 1;
 666                         break;
 667                 case IORESOURCE_IRQ:
 668                         irq = &option->u.irq;
 669                         if (start < PNP_IRQ_NR &&
 670                             test_bit(start, irq->map.bits))
 671                                 return 1;
 672                         break;
 673                 case IORESOURCE_DMA:
 674                         dma = &option->u.dma;
 675                         if (dma->map & (1 << start))
 676                                 return 1;
 677                         break;
 678                 }
 679         }
 680
 681         return 0;
 682 }
 683 EXPORT_SYMBOL(pnp_possible_config);
 684
 685 int pnp_range_reserved(resource_size_t start, resource_size_t end)
 686 {
 687         struct pnp_dev *dev;
 688         struct pnp_resource *pnp_res;
 689         resource_size_t *dev_start, *dev_end;
 690
 691         pnp_for_each_dev(dev) {
 692                 list_for_each_entry(pnp_res, &dev->resources, list) {
 693                         dev_start = &pnp_res->res.start;
 694                         dev_end   = &pnp_res->res.end;
 695                         if (ranged_conflict(&start, &end, dev_start, dev_end))
 696                                 return 1;
 697                 }
 698         }
 699         return 0;
 700 }
 701 EXPORT_SYMBOL(pnp_range_reserved);
 702
 703 /* format is: pnp_reserve_irq=irq1[,irq2] .... */
 704 static int __init pnp_setup_reserve_irq(char *str)
 705 {
 706         int i;
 707
 708         for (i = 0; i < 16; i++)
 709                 if (get_option(&str, &pnp_reserve_irq[i]) != 2)
 710                         break;
 711         return 1;
 712 }
 713
 714 __setup("pnp_reserve_irq=", pnp_setup_reserve_irq);
 715
 716 /* format is: pnp_reserve_dma=dma1[,dma2] .... */
 717 static int __init pnp_setup_reserve_dma(char *str)
 718 {
 719         int i;
 720
 721         for (i = 0; i < 8; i++)
 722                 if (get_option(&str, &pnp_reserve_dma[i]) != 2)
 723                         break;
 724         return 1;
 725 }
 726
 727 __setup("pnp_reserve_dma=", pnp_setup_reserve_dma);
 728
 729 /* format is: pnp_reserve_io=io1,size1[,io2,size2] .... */
 730 static int __init pnp_setup_reserve_io(char *str)
 731 {
 732         int i;
 733
 734         for (i = 0; i < 16; i++)
 735                 if (get_option(&str, &pnp_reserve_io[i]) != 2)
 736                         break;
 737         return 1;
 738 }
 739
 740 __setup("pnp_reserve_io=", pnp_setup_reserve_io);
 741
 742 /* format is: pnp_reserve_mem=mem1,size1[,mem2,size2] .... */
 743 static int __init pnp_setup_reserve_mem(char *str)
 744 {
 745         int i;
 746
 747         for (i = 0; i < 16; i++)
 748                 if (get_option(&str, &pnp_reserve_mem[i]) != 2)
 749                         break;
 750         return 1;
 751 }
 752
 753 __setup("pnp_reserve_mem=", pnp_setup_reserve_mem);