git.oblomov.eu Git - linux-2.6/blob - drivers/acpi/osl.c

   1 /*
   2  *  acpi_osl.c - OS-dependent functions ($Revision: 83 $)
   3  *
   4  *  Copyright (C) 2000       Andrew Henroid
   5  *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
   6  *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
   7  *  Copyright (c) 2008 Intel Corporation
   8  *   Author: Matthew Wilcox <willy@linux.intel.com>
   9  *
  10  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  11  *
  12  *  This program is free software; you can redistribute it and/or modify
  13  *  it under the terms of the GNU General Public License as published by
  14  *  the Free Software Foundation; either version 2 of the License, or
  15  *  (at your option) any later version.
  16  *
  17  *  This program is distributed in the hope that it will be useful,
  18  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *  GNU General Public License for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License
  23  *  along with this program; if not, write to the Free Software
  24  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  25  *
  26  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  27  *
  28  */
  29
  30 #include <linux/module.h>
  31 #include <linux/kernel.h>
  32 #include <linux/slab.h>
  33 #include <linux/mm.h>
  34 #include <linux/pci.h>
  35 #include <linux/interrupt.h>
  36 #include <linux/kmod.h>
  37 #include <linux/delay.h>
  38 #include <linux/workqueue.h>
  39 #include <linux/nmi.h>
  40 #include <linux/acpi.h>
  41 #include <linux/efi.h>
  42 #include <linux/ioport.h>
  43 #include <linux/list.h>
  44 #include <linux/jiffies.h>
  45 #include <linux/semaphore.h>
  46
  47 #include <asm/io.h>
  48 #include <asm/uaccess.h>
  49
  50 #include <acpi/acpi.h>
  51 #include <acpi/acpi_bus.h>
  52 #include <acpi/processor.h>
  53
  54 #define _COMPONENT              ACPI_OS_SERVICES
  55 ACPI_MODULE_NAME("osl");
  56 #define PREFIX          "ACPI: "
  57 struct acpi_os_dpc {
  58         acpi_osd_exec_callback function;
  59         void *context;
  60         struct work_struct work;
  61 };
  62
  63 #ifdef CONFIG_ACPI_CUSTOM_DSDT
  64 #include CONFIG_ACPI_CUSTOM_DSDT_FILE
  65 #endif
  66
  67 #ifdef ENABLE_DEBUGGER
  68 #include <linux/kdb.h>
  69
  70 /* stuff for debugger support */
  71 int acpi_in_debugger;
  72 EXPORT_SYMBOL(acpi_in_debugger);
  73
  74 extern char line_buf[80];
  75 #endif                          /*ENABLE_DEBUGGER */
  76
  77 static unsigned int acpi_irq_irq;
  78 static acpi_osd_handler acpi_irq_handler;
  79 static void *acpi_irq_context;
  80 static struct workqueue_struct *kacpid_wq;
  81 static struct workqueue_struct *kacpi_notify_wq;
  82
  83 struct acpi_res_list {
  84         resource_size_t start;
  85         resource_size_t end;
  86         acpi_adr_space_type resource_type; /* IO port, System memory, ...*/
  87         char name[5];   /* only can have a length of 4 chars, make use of this
  88                            one instead of res->name, no need to kalloc then */
  89         struct list_head resource_list;
  90 };
  91
  92 static LIST_HEAD(resource_list_head);
  93 static DEFINE_SPINLOCK(acpi_res_lock);
  94
  95 #define OSI_STRING_LENGTH_MAX 64        /* arbitrary */
  96 static char osi_additional_string[OSI_STRING_LENGTH_MAX];
  97
  98 /*
  99  * The story of _OSI(Linux)
 100  *
 101  * From pre-history through Linux-2.6.22,
 102  * Linux responded TRUE upon a BIOS OSI(Linux) query.
 103  *
 104  * Unfortunately, reference BIOS writers got wind of this
 105  * and put OSI(Linux) in their example code, quickly exposing
 106  * this string as ill-conceived and opening the door to
 107  * an un-bounded number of BIOS incompatibilities.
 108  *
 109  * For example, OSI(Linux) was used on resume to re-POST a
 110  * video card on one system, because Linux at that time
 111  * could not do a speedy restore in its native driver.
 112  * But then upon gaining quick native restore capability,
 113  * Linux has no way to tell the BIOS to skip the time-consuming
 114  * POST -- putting Linux at a permanent performance disadvantage.
 115  * On another system, the BIOS writer used OSI(Linux)
 116  * to infer native OS support for IPMI!  On other systems,
 117  * OSI(Linux) simply got in the way of Linux claiming to
 118  * be compatible with other operating systems, exposing
 119  * BIOS issues such as skipped device initialization.
 120  *
 121  * So "Linux" turned out to be a really poor chose of
 122  * OSI string, and from Linux-2.6.23 onward we respond FALSE.
 123  *
 124  * BIOS writers should NOT query _OSI(Linux) on future systems.
 125  * Linux will complain on the console when it sees it, and return FALSE.
 126  * To get Linux to return TRUE for your system  will require
 127  * a kernel source update to add a DMI entry,
 128  * or boot with "acpi_osi=Linux"
 129  */
 130
 131 static struct osi_linux {
 132         unsigned int    enable:1;
 133         unsigned int    dmi:1;
 134         unsigned int    cmdline:1;
 135         unsigned int    known:1;
 136 } osi_linux = { 0, 0, 0, 0};
 137
 138 static void __init acpi_request_region (struct acpi_generic_address *addr,
 139         unsigned int length, char *desc)
 140 {
 141         struct resource *res;
 142
 143         if (!addr->address || !length)
 144                 return;
 145
 146         if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_IO)
 147                 res = request_region(addr->address, length, desc);
 148         else if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
 149                 res = request_mem_region(addr->address, length, desc);
 150 }
 151
 152 static int __init acpi_reserve_resources(void)
 153 {
 154         acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length,
 155                 "ACPI PM1a_EVT_BLK");
 156
 157         acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length,
 158                 "ACPI PM1b_EVT_BLK");
 159
 160         acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length,
 161                 "ACPI PM1a_CNT_BLK");
 162
 163         acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length,
 164                 "ACPI PM1b_CNT_BLK");
 165
 166         if (acpi_gbl_FADT.pm_timer_length == 4)
 167                 acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR");
 168
 169         acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length,
 170                 "ACPI PM2_CNT_BLK");
 171
 172         /* Length of GPE blocks must be a non-negative multiple of 2 */
 173
 174         if (!(acpi_gbl_FADT.gpe0_block_length & 0x1))
 175                 acpi_request_region(&acpi_gbl_FADT.xgpe0_block,
 176                                acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK");
 177
 178         if (!(acpi_gbl_FADT.gpe1_block_length & 0x1))
 179                 acpi_request_region(&acpi_gbl_FADT.xgpe1_block,
 180                                acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK");
 181
 182         return 0;
 183 }
 184 device_initcall(acpi_reserve_resources);
 185
 186 acpi_status __init acpi_os_initialize(void)
 187 {
 188         return AE_OK;
 189 }
 190
 191 acpi_status acpi_os_initialize1(void)
 192 {
 193         kacpid_wq = create_singlethread_workqueue("kacpid");
 194         kacpi_notify_wq = create_singlethread_workqueue("kacpi_notify");
 195         BUG_ON(!kacpid_wq);
 196         BUG_ON(!kacpi_notify_wq);
 197         return AE_OK;
 198 }
 199
 200 acpi_status acpi_os_terminate(void)
 201 {
 202         if (acpi_irq_handler) {
 203                 acpi_os_remove_interrupt_handler(acpi_irq_irq,
 204                                                  acpi_irq_handler);
 205         }
 206
 207         destroy_workqueue(kacpid_wq);
 208         destroy_workqueue(kacpi_notify_wq);
 209
 210         return AE_OK;
 211 }
 212
 213 void acpi_os_printf(const char *fmt, ...)
 214 {
 215         va_list args;
 216         va_start(args, fmt);
 217         acpi_os_vprintf(fmt, args);
 218         va_end(args);
 219 }
 220
 221 void acpi_os_vprintf(const char *fmt, va_list args)
 222 {
 223         static char buffer[512];
 224
 225         vsprintf(buffer, fmt, args);
 226
 227 #ifdef ENABLE_DEBUGGER
 228         if (acpi_in_debugger) {
 229                 kdb_printf("%s", buffer);
 230         } else {
 231                 printk(KERN_CONT "%s", buffer);
 232         }
 233 #else
 234         printk(KERN_CONT "%s", buffer);
 235 #endif
 236 }
 237
 238 acpi_physical_address __init acpi_os_get_root_pointer(void)
 239 {
 240         if (efi_enabled) {
 241                 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
 242                         return efi.acpi20;
 243                 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
 244                         return efi.acpi;
 245                 else {
 246                         printk(KERN_ERR PREFIX
 247                                "System description tables not found\n");
 248                         return 0;
 249                 }
 250         } else {
 251                 acpi_physical_address pa = 0;
 252
 253                 acpi_find_root_pointer(&pa);
 254                 return pa;
 255         }
 256 }
 257
 258 void __iomem *__init_refok
 259 acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
 260 {
 261         if (phys > ULONG_MAX) {
 262                 printk(KERN_ERR PREFIX "Cannot map memory that high\n");
 263                 return NULL;
 264         }
 265         if (acpi_gbl_permanent_mmap)
 266                 /*
 267                 * ioremap checks to ensure this is in reserved space
 268                 */
 269                 return ioremap((unsigned long)phys, size);
 270         else
 271                 return __acpi_map_table((unsigned long)phys, size);
 272 }
 273 EXPORT_SYMBOL_GPL(acpi_os_map_memory);
 274
 275 void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
 276 {
 277         if (acpi_gbl_permanent_mmap)
 278                 iounmap(virt);
 279         else
 280                 __acpi_unmap_table(virt, size);
 281 }
 282 EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
 283
 284 void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
 285 {
 286         if (!acpi_gbl_permanent_mmap)
 287                 __acpi_unmap_table(virt, size);
 288 }
 289
 290 #ifdef ACPI_FUTURE_USAGE
 291 acpi_status
 292 acpi_os_get_physical_address(void *virt, acpi_physical_address * phys)
 293 {
 294         if (!phys || !virt)
 295                 return AE_BAD_PARAMETER;
 296
 297         *phys = virt_to_phys(virt);
 298
 299         return AE_OK;
 300 }
 301 #endif
 302
 303 #define ACPI_MAX_OVERRIDE_LEN 100
 304
 305 static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN];
 306
 307 acpi_status
 308 acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
 309                             acpi_string * new_val)
 310 {
 311         if (!init_val || !new_val)
 312                 return AE_BAD_PARAMETER;
 313
 314         *new_val = NULL;
 315         if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) {
 316                 printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n",
 317                        acpi_os_name);
 318                 *new_val = acpi_os_name;
 319         }
 320
 321         return AE_OK;
 322 }
 323
 324 acpi_status
 325 acpi_os_table_override(struct acpi_table_header * existing_table,
 326                        struct acpi_table_header ** new_table)
 327 {
 328         if (!existing_table || !new_table)
 329                 return AE_BAD_PARAMETER;
 330
 331         *new_table = NULL;
 332
 333 #ifdef CONFIG_ACPI_CUSTOM_DSDT
 334         if (strncmp(existing_table->signature, "DSDT", 4) == 0)
 335                 *new_table = (struct acpi_table_header *)AmlCode;
 336 #endif
 337         if (*new_table != NULL) {
 338                 printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], "
 339                            "this is unsafe: tainting kernel\n",
 340                        existing_table->signature,
 341                        existing_table->oem_table_id);
 342                 add_taint(TAINT_OVERRIDDEN_ACPI_TABLE);
 343         }
 344         return AE_OK;
 345 }
 346
 347 static irqreturn_t acpi_irq(int irq, void *dev_id)
 348 {
 349         u32 handled;
 350
 351         handled = (*acpi_irq_handler) (acpi_irq_context);
 352
 353         if (handled) {
 354                 acpi_irq_handled++;
 355                 return IRQ_HANDLED;
 356         } else {
 357                 acpi_irq_not_handled++;
 358                 return IRQ_NONE;
 359         }
 360 }
 361
 362 acpi_status
 363 acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
 364                                   void *context)
 365 {
 366         unsigned int irq;
 367
 368         acpi_irq_stats_init();
 369
 370         /*
 371          * Ignore the GSI from the core, and use the value in our copy of the
 372          * FADT. It may not be the same if an interrupt source override exists
 373          * for the SCI.
 374          */
 375         gsi = acpi_gbl_FADT.sci_interrupt;
 376         if (acpi_gsi_to_irq(gsi, &irq) < 0) {
 377                 printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n",
 378                        gsi);
 379                 return AE_OK;
 380         }
 381
 382         acpi_irq_handler = handler;
 383         acpi_irq_context = context;
 384         if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) {
 385                 printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq);
 386                 return AE_NOT_ACQUIRED;
 387         }
 388         acpi_irq_irq = irq;
 389
 390         return AE_OK;
 391 }
 392
 393 acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler)
 394 {
 395         if (irq) {
 396                 free_irq(irq, acpi_irq);
 397                 acpi_irq_handler = NULL;
 398                 acpi_irq_irq = 0;
 399         }
 400
 401         return AE_OK;
 402 }
 403
 404 /*
 405  * Running in interpreter thread context, safe to sleep
 406  */
 407
 408 void acpi_os_sleep(acpi_integer ms)
 409 {
 410         schedule_timeout_interruptible(msecs_to_jiffies(ms));
 411 }
 412
 413 void acpi_os_stall(u32 us)
 414 {
 415         while (us) {
 416                 u32 delay = 1000;
 417
 418                 if (delay > us)
 419                         delay = us;
 420                 udelay(delay);
 421                 touch_nmi_watchdog();
 422                 us -= delay;
 423         }
 424 }
 425
 426 /*
 427  * Support ACPI 3.0 AML Timer operand
 428  * Returns 64-bit free-running, monotonically increasing timer
 429  * with 100ns granularity
 430  */
 431 u64 acpi_os_get_timer(void)
 432 {
 433         static u64 t;
 434
 435 #ifdef  CONFIG_HPET
 436         /* TBD: use HPET if available */
 437 #endif
 438
 439 #ifdef  CONFIG_X86_PM_TIMER
 440         /* TBD: default to PM timer if HPET was not available */
 441 #endif
 442         if (!t)
 443                 printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n");
 444
 445         return ++t;
 446 }
 447
 448 acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
 449 {
 450         u32 dummy;
 451
 452         if (!value)
 453                 value = &dummy;
 454
 455         *value = 0;
 456         if (width <= 8) {
 457                 *(u8 *) value = inb(port);
 458         } else if (width <= 16) {
 459                 *(u16 *) value = inw(port);
 460         } else if (width <= 32) {
 461                 *(u32 *) value = inl(port);
 462         } else {
 463                 BUG();
 464         }
 465
 466         return AE_OK;
 467 }
 468
 469 EXPORT_SYMBOL(acpi_os_read_port);
 470
 471 acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
 472 {
 473         if (width <= 8) {
 474                 outb(value, port);
 475         } else if (width <= 16) {
 476                 outw(value, port);
 477         } else if (width <= 32) {
 478                 outl(value, port);
 479         } else {
 480                 BUG();
 481         }
 482
 483         return AE_OK;
 484 }
 485
 486 EXPORT_SYMBOL(acpi_os_write_port);
 487
 488 acpi_status
 489 acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width)
 490 {
 491         u32 dummy;
 492         void __iomem *virt_addr;
 493
 494         virt_addr = ioremap(phys_addr, width);
 495         if (!value)
 496                 value = &dummy;
 497
 498         switch (width) {
 499         case 8:
 500                 *(u8 *) value = readb(virt_addr);
 501                 break;
 502         case 16:
 503                 *(u16 *) value = readw(virt_addr);
 504                 break;
 505         case 32:
 506                 *(u32 *) value = readl(virt_addr);
 507                 break;
 508         default:
 509                 BUG();
 510         }
 511
 512         iounmap(virt_addr);
 513
 514         return AE_OK;
 515 }
 516
 517 acpi_status
 518 acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width)
 519 {
 520         void __iomem *virt_addr;
 521
 522         virt_addr = ioremap(phys_addr, width);
 523
 524         switch (width) {
 525         case 8:
 526                 writeb(value, virt_addr);
 527                 break;
 528         case 16:
 529                 writew(value, virt_addr);
 530                 break;
 531         case 32:
 532                 writel(value, virt_addr);
 533                 break;
 534         default:
 535                 BUG();
 536         }
 537
 538         iounmap(virt_addr);
 539
 540         return AE_OK;
 541 }
 542
 543 acpi_status
 544 acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
 545                                u32 *value, u32 width)
 546 {
 547         int result, size;
 548
 549         if (!value)
 550                 return AE_BAD_PARAMETER;
 551
 552         switch (width) {
 553         case 8:
 554                 size = 1;
 555                 break;
 556         case 16:
 557                 size = 2;
 558                 break;
 559         case 32:
 560                 size = 4;
 561                 break;
 562         default:
 563                 return AE_ERROR;
 564         }
 565
 566         result = raw_pci_read(pci_id->segment, pci_id->bus,
 567                                 PCI_DEVFN(pci_id->device, pci_id->function),
 568                                 reg, size, value);
 569
 570         return (result ? AE_ERROR : AE_OK);
 571 }
 572
 573 acpi_status
 574 acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
 575                                 acpi_integer value, u32 width)
 576 {
 577         int result, size;
 578
 579         switch (width) {
 580         case 8:
 581                 size = 1;
 582                 break;
 583         case 16:
 584                 size = 2;
 585                 break;
 586         case 32:
 587                 size = 4;
 588                 break;
 589         default:
 590                 return AE_ERROR;
 591         }
 592
 593         result = raw_pci_write(pci_id->segment, pci_id->bus,
 594                                 PCI_DEVFN(pci_id->device, pci_id->function),
 595                                 reg, size, value);
 596
 597         return (result ? AE_ERROR : AE_OK);
 598 }
 599
 600 /* TODO: Change code to take advantage of driver model more */
 601 static void acpi_os_derive_pci_id_2(acpi_handle rhandle,        /* upper bound  */
 602                                     acpi_handle chandle,        /* current node */
 603                                     struct acpi_pci_id **id,
 604                                     int *is_bridge, u8 * bus_number)
 605 {
 606         acpi_handle handle;
 607         struct acpi_pci_id *pci_id = *id;
 608         acpi_status status;
 609         unsigned long long temp;
 610         acpi_object_type type;
 611
 612         acpi_get_parent(chandle, &handle);
 613         if (handle != rhandle) {
 614                 acpi_os_derive_pci_id_2(rhandle, handle, &pci_id, is_bridge,
 615                                         bus_number);
 616
 617                 status = acpi_get_type(handle, &type);
 618                 if ((ACPI_FAILURE(status)) || (type != ACPI_TYPE_DEVICE))
 619                         return;
 620
 621                 status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL,
 622                                           &temp);
 623                 if (ACPI_SUCCESS(status)) {
 624                         u32 val;
 625                         pci_id->device = ACPI_HIWORD(ACPI_LODWORD(temp));
 626                         pci_id->function = ACPI_LOWORD(ACPI_LODWORD(temp));
 627
 628                         if (*is_bridge)
 629                                 pci_id->bus = *bus_number;
 630
 631                         /* any nicer way to get bus number of bridge ? */
 632                         status =
 633                             acpi_os_read_pci_configuration(pci_id, 0x0e, &val,
 634                                                            8);
 635                         if (ACPI_SUCCESS(status)
 636                             && ((val & 0x7f) == 1 || (val & 0x7f) == 2)) {
 637                                 status =
 638                                     acpi_os_read_pci_configuration(pci_id, 0x18,
 639                                                                    &val, 8);
 640                                 if (!ACPI_SUCCESS(status)) {
 641                                         /* Certainly broken...  FIX ME */
 642                                         return;
 643                                 }
 644                                 *is_bridge = 1;
 645                                 pci_id->bus = val;
 646                                 status =
 647                                     acpi_os_read_pci_configuration(pci_id, 0x19,
 648                                                                    &val, 8);
 649                                 if (ACPI_SUCCESS(status)) {
 650                                         *bus_number = val;
 651                                 }
 652                         } else
 653                                 *is_bridge = 0;
 654                 }
 655         }
 656 }
 657
 658 void acpi_os_derive_pci_id(acpi_handle rhandle, /* upper bound  */
 659                            acpi_handle chandle, /* current node */
 660                            struct acpi_pci_id **id)
 661 {
 662         int is_bridge = 1;
 663         u8 bus_number = (*id)->bus;
 664
 665         acpi_os_derive_pci_id_2(rhandle, chandle, id, &is_bridge, &bus_number);
 666 }
 667
 668 static void acpi_os_execute_deferred(struct work_struct *work)
 669 {
 670         struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
 671         if (!dpc) {
 672                 printk(KERN_ERR PREFIX "Invalid (NULL) context\n");
 673                 return;
 674         }
 675
 676         dpc->function(dpc->context);
 677         kfree(dpc);
 678
 679         return;
 680 }
 681
 682 static void acpi_os_execute_hp_deferred(struct work_struct *work)
 683 {
 684         struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
 685         if (!dpc) {
 686                 printk(KERN_ERR PREFIX "Invalid (NULL) context\n");
 687                 return;
 688         }
 689
 690         acpi_os_wait_events_complete(NULL);
 691
 692         dpc->function(dpc->context);
 693         kfree(dpc);
 694
 695         return;
 696 }
 697
 698 /*******************************************************************************
 699  *
 700  * FUNCTION:    acpi_os_execute
 701  *
 702  * PARAMETERS:  Type               - Type of the callback
 703  *              Function           - Function to be executed
 704  *              Context            - Function parameters
 705  *
 706  * RETURN:      Status
 707  *
 708  * DESCRIPTION: Depending on type, either queues function for deferred execution or
 709  *              immediately executes function on a separate thread.
 710  *
 711  ******************************************************************************/
 712
 713 static acpi_status __acpi_os_execute(acpi_execute_type type,
 714         acpi_osd_exec_callback function, void *context, int hp)
 715 {
 716         acpi_status status = AE_OK;
 717         struct acpi_os_dpc *dpc;
 718         struct workqueue_struct *queue;
 719         int ret;
 720         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 721                           "Scheduling function [%p(%p)] for deferred execution.\n",
 722                           function, context));
 723
 724         if (!function)
 725                 return AE_BAD_PARAMETER;
 726
 727         /*
 728          * Allocate/initialize DPC structure.  Note that this memory will be
 729          * freed by the callee.  The kernel handles the work_struct list  in a
 730          * way that allows us to also free its memory inside the callee.
 731          * Because we may want to schedule several tasks with different
 732          * parameters we can't use the approach some kernel code uses of
 733          * having a static work_struct.
 734          */
 735
 736         dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC);
 737         if (!dpc)
 738                 return AE_NO_MEMORY;
 739
 740         dpc->function = function;
 741         dpc->context = context;
 742
 743         if (!hp) {
 744                 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
 745                 queue = (type == OSL_NOTIFY_HANDLER) ?
 746                         kacpi_notify_wq : kacpid_wq;
 747                 ret = queue_work(queue, &dpc->work);
 748         } else {
 749                 INIT_WORK(&dpc->work, acpi_os_execute_hp_deferred);
 750                 ret = schedule_work(&dpc->work);
 751         }
 752
 753         if (!ret) {
 754                 printk(KERN_ERR PREFIX
 755                           "Call to queue_work() failed.\n");
 756                 status = AE_ERROR;
 757                 kfree(dpc);
 758         }
 759         return status;
 760 }
 761
 762 acpi_status acpi_os_execute(acpi_execute_type type,
 763                             acpi_osd_exec_callback function, void *context)
 764 {
 765         return __acpi_os_execute(type, function, context, 0);
 766 }
 767 EXPORT_SYMBOL(acpi_os_execute);
 768
 769 acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function,
 770         void *context)
 771 {
 772         return __acpi_os_execute(0, function, context, 1);
 773 }
 774
 775 void acpi_os_wait_events_complete(void *context)
 776 {
 777         flush_workqueue(kacpid_wq);
 778         flush_workqueue(kacpi_notify_wq);
 779 }
 780
 781 EXPORT_SYMBOL(acpi_os_wait_events_complete);
 782
 783 /*
 784  * Allocate the memory for a spinlock and initialize it.
 785  */
 786 acpi_status acpi_os_create_lock(acpi_spinlock * handle)
 787 {
 788         spin_lock_init(*handle);
 789
 790         return AE_OK;
 791 }
 792
 793 /*
 794  * Deallocate the memory for a spinlock.
 795  */
 796 void acpi_os_delete_lock(acpi_spinlock handle)
 797 {
 798         return;
 799 }
 800
 801 acpi_status
 802 acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
 803 {
 804         struct semaphore *sem = NULL;
 805
 806         sem = acpi_os_allocate(sizeof(struct semaphore));
 807         if (!sem)
 808                 return AE_NO_MEMORY;
 809         memset(sem, 0, sizeof(struct semaphore));
 810
 811         sema_init(sem, initial_units);
 812
 813         *handle = (acpi_handle *) sem;
 814
 815         ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n",
 816                           *handle, initial_units));
 817
 818         return AE_OK;
 819 }
 820
 821 /*
 822  * TODO: A better way to delete semaphores?  Linux doesn't have a
 823  * 'delete_semaphore()' function -- may result in an invalid
 824  * pointer dereference for non-synchronized consumers.  Should
 825  * we at least check for blocked threads and signal/cancel them?
 826  */
 827
 828 acpi_status acpi_os_delete_semaphore(acpi_handle handle)
 829 {
 830         struct semaphore *sem = (struct semaphore *)handle;
 831
 832         if (!sem)
 833                 return AE_BAD_PARAMETER;
 834
 835         ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle));
 836
 837         BUG_ON(!list_empty(&sem->wait_list));
 838         kfree(sem);
 839         sem = NULL;
 840
 841         return AE_OK;
 842 }
 843
 844 /*
 845  * TODO: Support for units > 1?
 846  */
 847 acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
 848 {
 849         acpi_status status = AE_OK;
 850         struct semaphore *sem = (struct semaphore *)handle;
 851         long jiffies;
 852         int ret = 0;
 853
 854         if (!sem || (units < 1))
 855                 return AE_BAD_PARAMETER;
 856
 857         if (units > 1)
 858                 return AE_SUPPORT;
 859
 860         ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n",
 861                           handle, units, timeout));
 862
 863         if (timeout == ACPI_WAIT_FOREVER)
 864                 jiffies = MAX_SCHEDULE_TIMEOUT;
 865         else
 866                 jiffies = msecs_to_jiffies(timeout);
 867
 868         ret = down_timeout(sem, jiffies);
 869         if (ret)
 870                 status = AE_TIME;
 871
 872         if (ACPI_FAILURE(status)) {
 873                 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
 874                                   "Failed to acquire semaphore[%p|%d|%d], %s",
 875                                   handle, units, timeout,
 876                                   acpi_format_exception(status)));
 877         } else {
 878                 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
 879                                   "Acquired semaphore[%p|%d|%d]", handle,
 880                                   units, timeout));
 881         }
 882
 883         return status;
 884 }
 885
 886 /*
 887  * TODO: Support for units > 1?
 888  */
 889 acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
 890 {
 891         struct semaphore *sem = (struct semaphore *)handle;
 892
 893         if (!sem || (units < 1))
 894                 return AE_BAD_PARAMETER;
 895
 896         if (units > 1)
 897                 return AE_SUPPORT;
 898
 899         ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle,
 900                           units));
 901
 902         up(sem);
 903
 904         return AE_OK;
 905 }
 906
 907 #ifdef ACPI_FUTURE_USAGE
 908 u32 acpi_os_get_line(char *buffer)
 909 {
 910
 911 #ifdef ENABLE_DEBUGGER
 912         if (acpi_in_debugger) {
 913                 u32 chars;
 914
 915                 kdb_read(buffer, sizeof(line_buf));
 916
 917                 /* remove the CR kdb includes */
 918                 chars = strlen(buffer) - 1;
 919                 buffer[chars] = '\0';
 920         }
 921 #endif
 922
 923         return 0;
 924 }
 925 #endif                          /*  ACPI_FUTURE_USAGE  */
 926
 927 acpi_status acpi_os_signal(u32 function, void *info)
 928 {
 929         switch (function) {
 930         case ACPI_SIGNAL_FATAL:
 931                 printk(KERN_ERR PREFIX "Fatal opcode executed\n");
 932                 break;
 933         case ACPI_SIGNAL_BREAKPOINT:
 934                 /*
 935                  * AML Breakpoint
 936                  * ACPI spec. says to treat it as a NOP unless
 937                  * you are debugging.  So if/when we integrate
 938                  * AML debugger into the kernel debugger its
 939                  * hook will go here.  But until then it is
 940                  * not useful to print anything on breakpoints.
 941                  */
 942                 break;
 943         default:
 944                 break;
 945         }
 946
 947         return AE_OK;
 948 }
 949
 950 static int __init acpi_os_name_setup(char *str)
 951 {
 952         char *p = acpi_os_name;
 953         int count = ACPI_MAX_OVERRIDE_LEN - 1;
 954
 955         if (!str || !*str)
 956                 return 0;
 957
 958         for (; count-- && str && *str; str++) {
 959                 if (isalnum(*str) || *str == ' ' || *str == ':')
 960                         *p++ = *str;
 961                 else if (*str == '\'' || *str == '"')
 962                         continue;
 963                 else
 964                         break;
 965         }
 966         *p = 0;
 967
 968         return 1;
 969
 970 }
 971
 972 __setup("acpi_os_name=", acpi_os_name_setup);
 973
 974 static void __init set_osi_linux(unsigned int enable)
 975 {
 976         if (osi_linux.enable != enable) {
 977                 osi_linux.enable = enable;
 978                 printk(KERN_NOTICE PREFIX "%sed _OSI(Linux)\n",
 979                         enable ? "Add": "Delet");
 980         }
 981         return;
 982 }
 983
 984 static void __init acpi_cmdline_osi_linux(unsigned int enable)
 985 {
 986         osi_linux.cmdline = 1;  /* cmdline set the default */
 987         set_osi_linux(enable);
 988
 989         return;
 990 }
 991
 992 void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d)
 993 {
 994         osi_linux.dmi = 1;      /* DMI knows that this box asks OSI(Linux) */
 995
 996         printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident);
 997
 998         if (enable == -1)
 999                 return;
1000
1001         osi_linux.known = 1;    /* DMI knows which OSI(Linux) default needed */
1002
1003         set_osi_linux(enable);
1004
1005         return;
1006 }
1007
1008 /*
1009  * Modify the list of "OS Interfaces" reported to BIOS via _OSI
1010  *
1011  * empty string disables _OSI
1012  * string starting with '!' disables that string
1013  * otherwise string is added to list, augmenting built-in strings
1014  */
1015 int __init acpi_osi_setup(char *str)
1016 {
1017         if (str == NULL || *str == '\0') {
1018                 printk(KERN_INFO PREFIX "_OSI method disabled\n");
1019                 acpi_gbl_create_osi_method = FALSE;
1020         } else if (!strcmp("!Linux", str)) {
1021                 acpi_cmdline_osi_linux(0);      /* !enable */
1022         } else if (*str == '!') {
1023                 if (acpi_osi_invalidate(++str) == AE_OK)
1024                         printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
1025         } else if (!strcmp("Linux", str)) {
1026                 acpi_cmdline_osi_linux(1);      /* enable */
1027         } else if (*osi_additional_string == '\0') {
1028                 strncpy(osi_additional_string, str, OSI_STRING_LENGTH_MAX);
1029                 printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
1030         }
1031
1032         return 1;
1033 }
1034
1035 __setup("acpi_osi=", acpi_osi_setup);
1036
1037 /* enable serialization to combat AE_ALREADY_EXISTS errors */
1038 static int __init acpi_serialize_setup(char *str)
1039 {
1040         printk(KERN_INFO PREFIX "serialize enabled\n");
1041
1042         acpi_gbl_all_methods_serialized = TRUE;
1043
1044         return 1;
1045 }
1046
1047 __setup("acpi_serialize", acpi_serialize_setup);
1048
1049 /*
1050  * Wake and Run-Time GPES are expected to be separate.
1051  * We disable wake-GPEs at run-time to prevent spurious
1052  * interrupts.
1053  *
1054  * However, if a system exists that shares Wake and
1055  * Run-time events on the same GPE this flag is available
1056  * to tell Linux to keep the wake-time GPEs enabled at run-time.
1057  */
1058 static int __init acpi_wake_gpes_always_on_setup(char *str)
1059 {
1060         printk(KERN_INFO PREFIX "wake GPEs not disabled\n");
1061
1062         acpi_gbl_leave_wake_gpes_disabled = FALSE;
1063
1064         return 1;
1065 }
1066
1067 __setup("acpi_wake_gpes_always_on", acpi_wake_gpes_always_on_setup);
1068
1069 /* Check of resource interference between native drivers and ACPI
1070  * OperationRegions (SystemIO and System Memory only).
1071  * IO ports and memory declared in ACPI might be used by the ACPI subsystem
1072  * in arbitrary AML code and can interfere with legacy drivers.
1073  * acpi_enforce_resources= can be set to:
1074  *
1075  *   - strict (default) (2)
1076  *     -> further driver trying to access the resources will not load
1077  *   - lax              (1)
1078  *     -> further driver trying to access the resources will load, but you
1079  *     get a system message that something might go wrong...
1080  *
1081  *   - no               (0)
1082  *     -> ACPI Operation Region resources will not be registered
1083  *
1084  */
1085 #define ENFORCE_RESOURCES_STRICT 2
1086 #define ENFORCE_RESOURCES_LAX    1
1087 #define ENFORCE_RESOURCES_NO     0
1088
1089 static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1090
1091 static int __init acpi_enforce_resources_setup(char *str)
1092 {
1093         if (str == NULL || *str == '\0')
1094                 return 0;
1095
1096         if (!strcmp("strict", str))
1097                 acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1098         else if (!strcmp("lax", str))
1099                 acpi_enforce_resources = ENFORCE_RESOURCES_LAX;
1100         else if (!strcmp("no", str))
1101                 acpi_enforce_resources = ENFORCE_RESOURCES_NO;
1102
1103         return 1;
1104 }
1105
1106 __setup("acpi_enforce_resources=", acpi_enforce_resources_setup);
1107
1108 /* Check for resource conflicts between ACPI OperationRegions and native
1109  * drivers */
1110 int acpi_check_resource_conflict(struct resource *res)
1111 {
1112         struct acpi_res_list *res_list_elem;
1113         int ioport;
1114         int clash = 0;
1115
1116         if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
1117                 return 0;
1118         if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM))
1119                 return 0;
1120
1121         ioport = res->flags & IORESOURCE_IO;
1122
1123         spin_lock(&acpi_res_lock);
1124         list_for_each_entry(res_list_elem, &resource_list_head,
1125                             resource_list) {
1126                 if (ioport && (res_list_elem->resource_type
1127                                != ACPI_ADR_SPACE_SYSTEM_IO))
1128                         continue;
1129                 if (!ioport && (res_list_elem->resource_type
1130                                 != ACPI_ADR_SPACE_SYSTEM_MEMORY))
1131                         continue;
1132
1133                 if (res->end < res_list_elem->start
1134                     || res_list_elem->end < res->start)
1135                         continue;
1136                 clash = 1;
1137                 break;
1138         }
1139         spin_unlock(&acpi_res_lock);
1140
1141         if (clash) {
1142                 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) {
1143                         printk("%sACPI: %s resource %s [0x%llx-0x%llx]"
1144                                " conflicts with ACPI region %s"
1145                                " [0x%llx-0x%llx]\n",
1146                                acpi_enforce_resources == ENFORCE_RESOURCES_LAX
1147                                ? KERN_WARNING : KERN_ERR,
1148                                ioport ? "I/O" : "Memory", res->name,
1149                                (long long) res->start, (long long) res->end,
1150                                res_list_elem->name,
1151                                (long long) res_list_elem->start,
1152                                (long long) res_list_elem->end);
1153                         printk(KERN_INFO "ACPI: Device needs an ACPI driver\n");
1154                 }
1155                 if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT)
1156                         return -EBUSY;
1157         }
1158         return 0;
1159 }
1160 EXPORT_SYMBOL(acpi_check_resource_conflict);
1161
1162 int acpi_check_region(resource_size_t start, resource_size_t n,
1163                       const char *name)
1164 {
1165         struct resource res = {
1166                 .start = start,
1167                 .end   = start + n - 1,
1168                 .name  = name,
1169                 .flags = IORESOURCE_IO,
1170         };
1171
1172         return acpi_check_resource_conflict(&res);
1173 }
1174 EXPORT_SYMBOL(acpi_check_region);
1175
1176 int acpi_check_mem_region(resource_size_t start, resource_size_t n,
1177                       const char *name)
1178 {
1179         struct resource res = {
1180                 .start = start,
1181                 .end   = start + n - 1,
1182                 .name  = name,
1183                 .flags = IORESOURCE_MEM,
1184         };
1185
1186         return acpi_check_resource_conflict(&res);
1187
1188 }
1189 EXPORT_SYMBOL(acpi_check_mem_region);
1190
1191 /*
1192  * Acquire a spinlock.
1193  *
1194  * handle is a pointer to the spinlock_t.
1195  */
1196
1197 acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp)
1198 {
1199         acpi_cpu_flags flags;
1200         spin_lock_irqsave(lockp, flags);
1201         return flags;
1202 }
1203
1204 /*
1205  * Release a spinlock. See above.
1206  */
1207
1208 void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags)
1209 {
1210         spin_unlock_irqrestore(lockp, flags);
1211 }
1212
1213 #ifndef ACPI_USE_LOCAL_CACHE
1214
1215 /*******************************************************************************
1216  *
1217  * FUNCTION:    acpi_os_create_cache
1218  *
1219  * PARAMETERS:  name      - Ascii name for the cache
1220  *              size      - Size of each cached object
1221  *              depth     - Maximum depth of the cache (in objects) <ignored>
1222  *              cache     - Where the new cache object is returned
1223  *
1224  * RETURN:      status
1225  *
1226  * DESCRIPTION: Create a cache object
1227  *
1228  ******************************************************************************/
1229
1230 acpi_status
1231 acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache)
1232 {
1233         *cache = kmem_cache_create(name, size, 0, 0, NULL);
1234         if (*cache == NULL)
1235                 return AE_ERROR;
1236         else
1237                 return AE_OK;
1238 }
1239
1240 /*******************************************************************************
1241  *
1242  * FUNCTION:    acpi_os_purge_cache
1243  *
1244  * PARAMETERS:  Cache           - Handle to cache object
1245  *
1246  * RETURN:      Status
1247  *
1248  * DESCRIPTION: Free all objects within the requested cache.
1249  *
1250  ******************************************************************************/
1251
1252 acpi_status acpi_os_purge_cache(acpi_cache_t * cache)
1253 {
1254         kmem_cache_shrink(cache);
1255         return (AE_OK);
1256 }
1257
1258 /*******************************************************************************
1259  *
1260  * FUNCTION:    acpi_os_delete_cache
1261  *
1262  * PARAMETERS:  Cache           - Handle to cache object
1263  *
1264  * RETURN:      Status
1265  *
1266  * DESCRIPTION: Free all objects within the requested cache and delete the
1267  *              cache object.
1268  *
1269  ******************************************************************************/
1270
1271 acpi_status acpi_os_delete_cache(acpi_cache_t * cache)
1272 {
1273         kmem_cache_destroy(cache);
1274         return (AE_OK);
1275 }
1276
1277 /*******************************************************************************
1278  *
1279  * FUNCTION:    acpi_os_release_object
1280  *
1281  * PARAMETERS:  Cache       - Handle to cache object
1282  *              Object      - The object to be released
1283  *
1284  * RETURN:      None
1285  *
1286  * DESCRIPTION: Release an object to the specified cache.  If cache is full,
1287  *              the object is deleted.
1288  *
1289  ******************************************************************************/
1290
1291 acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)
1292 {
1293         kmem_cache_free(cache, object);
1294         return (AE_OK);
1295 }
1296
1297 /******************************************************************************
1298  *
1299  * FUNCTION:    acpi_os_validate_interface
1300  *
1301  * PARAMETERS:  interface           - Requested interface to be validated
1302  *
1303  * RETURN:      AE_OK if interface is supported, AE_SUPPORT otherwise
1304  *
1305  * DESCRIPTION: Match an interface string to the interfaces supported by the
1306  *              host. Strings originate from an AML call to the _OSI method.
1307  *
1308  *****************************************************************************/
1309
1310 acpi_status
1311 acpi_os_validate_interface (char *interface)
1312 {
1313         if (!strncmp(osi_additional_string, interface, OSI_STRING_LENGTH_MAX))
1314                 return AE_OK;
1315         if (!strcmp("Linux", interface)) {
1316
1317                 printk(KERN_NOTICE PREFIX
1318                         "BIOS _OSI(Linux) query %s%s\n",
1319                         osi_linux.enable ? "honored" : "ignored",
1320                         osi_linux.cmdline ? " via cmdline" :
1321                         osi_linux.dmi ? " via DMI" : "");
1322
1323                 if (osi_linux.enable)
1324                         return AE_OK;
1325         }
1326         return AE_SUPPORT;
1327 }
1328
1329 /******************************************************************************
1330  *
1331  * FUNCTION:    acpi_os_validate_address
1332  *
1333  * PARAMETERS:  space_id             - ACPI space ID
1334  *              address             - Physical address
1335  *              length              - Address length
1336  *
1337  * RETURN:      AE_OK if address/length is valid for the space_id. Otherwise,
1338  *              should return AE_AML_ILLEGAL_ADDRESS.
1339  *
1340  * DESCRIPTION: Validate a system address via the host OS. Used to validate
1341  *              the addresses accessed by AML operation regions.
1342  *
1343  *****************************************************************************/
1344
1345 acpi_status
1346 acpi_os_validate_address (
1347     u8                   space_id,
1348     acpi_physical_address   address,
1349     acpi_size               length,
1350     char *name)
1351 {
1352         struct acpi_res_list *res;
1353         if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
1354                 return AE_OK;
1355
1356         switch (space_id) {
1357         case ACPI_ADR_SPACE_SYSTEM_IO:
1358         case ACPI_ADR_SPACE_SYSTEM_MEMORY:
1359                 /* Only interference checks against SystemIO and SytemMemory
1360                    are needed */
1361                 res = kzalloc(sizeof(struct acpi_res_list), GFP_KERNEL);
1362                 if (!res)
1363                         return AE_OK;
1364                 /* ACPI names are fixed to 4 bytes, still better use strlcpy */
1365                 strlcpy(res->name, name, 5);
1366                 res->start = address;
1367                 res->end = address + length - 1;
1368                 res->resource_type = space_id;
1369                 spin_lock(&acpi_res_lock);
1370                 list_add(&res->resource_list, &resource_list_head);
1371                 spin_unlock(&acpi_res_lock);
1372                 pr_debug("Added %s resource: start: 0x%llx, end: 0x%llx, "
1373                          "name: %s\n", (space_id == ACPI_ADR_SPACE_SYSTEM_IO)
1374                          ? "SystemIO" : "System Memory",
1375                          (unsigned long long)res->start,
1376                          (unsigned long long)res->end,
1377                          res->name);
1378                 break;
1379         case ACPI_ADR_SPACE_PCI_CONFIG:
1380         case ACPI_ADR_SPACE_EC:
1381         case ACPI_ADR_SPACE_SMBUS:
1382         case ACPI_ADR_SPACE_CMOS:
1383         case ACPI_ADR_SPACE_PCI_BAR_TARGET:
1384         case ACPI_ADR_SPACE_DATA_TABLE:
1385         case ACPI_ADR_SPACE_FIXED_HARDWARE:
1386                 break;
1387         }
1388         return AE_OK;
1389 }
1390
1391 #endif