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 static struct workqueue_struct *kacpi_hotplug_wq;
  83
  84 struct acpi_res_list {
  85         resource_size_t start;
  86         resource_size_t end;
  87         acpi_adr_space_type resource_type; /* IO port, System memory, ...*/
  88         char name[5];   /* only can have a length of 4 chars, make use of this
  89                            one instead of res->name, no need to kalloc then */
  90         struct list_head resource_list;
  91 };
  92
  93 static LIST_HEAD(resource_list_head);
  94 static DEFINE_SPINLOCK(acpi_res_lock);
  95
  96 #define OSI_STRING_LENGTH_MAX 64        /* arbitrary */
  97 static char osi_additional_string[OSI_STRING_LENGTH_MAX];
  98
  99 /*
 100  * The story of _OSI(Linux)
 101  *
 102  * From pre-history through Linux-2.6.22,
 103  * Linux responded TRUE upon a BIOS OSI(Linux) query.
 104  *
 105  * Unfortunately, reference BIOS writers got wind of this
 106  * and put OSI(Linux) in their example code, quickly exposing
 107  * this string as ill-conceived and opening the door to
 108  * an un-bounded number of BIOS incompatibilities.
 109  *
 110  * For example, OSI(Linux) was used on resume to re-POST a
 111  * video card on one system, because Linux at that time
 112  * could not do a speedy restore in its native driver.
 113  * But then upon gaining quick native restore capability,
 114  * Linux has no way to tell the BIOS to skip the time-consuming
 115  * POST -- putting Linux at a permanent performance disadvantage.
 116  * On another system, the BIOS writer used OSI(Linux)
 117  * to infer native OS support for IPMI!  On other systems,
 118  * OSI(Linux) simply got in the way of Linux claiming to
 119  * be compatible with other operating systems, exposing
 120  * BIOS issues such as skipped device initialization.
 121  *
 122  * So "Linux" turned out to be a really poor chose of
 123  * OSI string, and from Linux-2.6.23 onward we respond FALSE.
 124  *
 125  * BIOS writers should NOT query _OSI(Linux) on future systems.
 126  * Linux will complain on the console when it sees it, and return FALSE.
 127  * To get Linux to return TRUE for your system  will require
 128  * a kernel source update to add a DMI entry,
 129  * or boot with "acpi_osi=Linux"
 130  */
 131
 132 static struct osi_linux {
 133         unsigned int    enable:1;
 134         unsigned int    dmi:1;
 135         unsigned int    cmdline:1;
 136         unsigned int    known:1;
 137 } osi_linux = { 0, 0, 0, 0};
 138
 139 static void __init acpi_request_region (struct acpi_generic_address *addr,
 140         unsigned int length, char *desc)
 141 {
 142         struct resource *res;
 143
 144         if (!addr->address || !length)
 145                 return;
 146
 147         if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_IO)
 148                 res = request_region(addr->address, length, desc);
 149         else if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
 150                 res = request_mem_region(addr->address, length, desc);
 151 }
 152
 153 static int __init acpi_reserve_resources(void)
 154 {
 155         acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length,
 156                 "ACPI PM1a_EVT_BLK");
 157
 158         acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length,
 159                 "ACPI PM1b_EVT_BLK");
 160
 161         acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length,
 162                 "ACPI PM1a_CNT_BLK");
 163
 164         acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length,
 165                 "ACPI PM1b_CNT_BLK");
 166
 167         if (acpi_gbl_FADT.pm_timer_length == 4)
 168                 acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR");
 169
 170         acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length,
 171                 "ACPI PM2_CNT_BLK");
 172
 173         /* Length of GPE blocks must be a non-negative multiple of 2 */
 174
 175         if (!(acpi_gbl_FADT.gpe0_block_length & 0x1))
 176                 acpi_request_region(&acpi_gbl_FADT.xgpe0_block,
 177                                acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK");
 178
 179         if (!(acpi_gbl_FADT.gpe1_block_length & 0x1))
 180                 acpi_request_region(&acpi_gbl_FADT.xgpe1_block,
 181                                acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK");
 182
 183         return 0;
 184 }
 185 device_initcall(acpi_reserve_resources);
 186
 187 acpi_status __init acpi_os_initialize(void)
 188 {
 189         return AE_OK;
 190 }
 191
 192 acpi_status acpi_os_initialize1(void)
 193 {
 194         kacpid_wq = create_singlethread_workqueue("kacpid");
 195         kacpi_notify_wq = create_singlethread_workqueue("kacpi_notify");
 196         kacpi_hotplug_wq = create_singlethread_workqueue("kacpi_hotplug");
 197         BUG_ON(!kacpid_wq);
 198         BUG_ON(!kacpi_notify_wq);
 199         BUG_ON(!kacpi_hotplug_wq);
 200         return AE_OK;
 201 }
 202
 203 acpi_status acpi_os_terminate(void)
 204 {
 205         if (acpi_irq_handler) {
 206                 acpi_os_remove_interrupt_handler(acpi_irq_irq,
 207                                                  acpi_irq_handler);
 208         }
 209
 210         destroy_workqueue(kacpid_wq);
 211         destroy_workqueue(kacpi_notify_wq);
 212         destroy_workqueue(kacpi_hotplug_wq);
 213
 214         return AE_OK;
 215 }
 216
 217 void acpi_os_printf(const char *fmt, ...)
 218 {
 219         va_list args;
 220         va_start(args, fmt);
 221         acpi_os_vprintf(fmt, args);
 222         va_end(args);
 223 }
 224
 225 void acpi_os_vprintf(const char *fmt, va_list args)
 226 {
 227         static char buffer[512];
 228
 229         vsprintf(buffer, fmt, args);
 230
 231 #ifdef ENABLE_DEBUGGER
 232         if (acpi_in_debugger) {
 233                 kdb_printf("%s", buffer);
 234         } else {
 235                 printk(KERN_CONT "%s", buffer);
 236         }
 237 #else
 238         printk(KERN_CONT "%s", buffer);
 239 #endif
 240 }
 241
 242 acpi_physical_address __init acpi_os_get_root_pointer(void)
 243 {
 244         if (efi_enabled) {
 245                 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
 246                         return efi.acpi20;
 247                 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
 248                         return efi.acpi;
 249                 else {
 250                         printk(KERN_ERR PREFIX
 251                                "System description tables not found\n");
 252                         return 0;
 253                 }
 254         } else {
 255                 acpi_physical_address pa = 0;
 256
 257                 acpi_find_root_pointer(&pa);
 258                 return pa;
 259         }
 260 }
 261
 262 void __iomem *__init_refok
 263 acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
 264 {
 265         if (phys > ULONG_MAX) {
 266                 printk(KERN_ERR PREFIX "Cannot map memory that high\n");
 267                 return NULL;
 268         }
 269         if (acpi_gbl_permanent_mmap)
 270                 /*
 271                 * ioremap checks to ensure this is in reserved space
 272                 */
 273                 return ioremap((unsigned long)phys, size);
 274         else
 275                 return __acpi_map_table((unsigned long)phys, size);
 276 }
 277 EXPORT_SYMBOL_GPL(acpi_os_map_memory);
 278
 279 void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
 280 {
 281         if (acpi_gbl_permanent_mmap)
 282                 iounmap(virt);
 283         else
 284                 __acpi_unmap_table(virt, size);
 285 }
 286 EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
 287
 288 void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
 289 {
 290         if (!acpi_gbl_permanent_mmap)
 291                 __acpi_unmap_table(virt, size);
 292 }
 293
 294 #ifdef ACPI_FUTURE_USAGE
 295 acpi_status
 296 acpi_os_get_physical_address(void *virt, acpi_physical_address * phys)
 297 {
 298         if (!phys || !virt)
 299                 return AE_BAD_PARAMETER;
 300
 301         *phys = virt_to_phys(virt);
 302
 303         return AE_OK;
 304 }
 305 #endif
 306
 307 #define ACPI_MAX_OVERRIDE_LEN 100
 308
 309 static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN];
 310
 311 acpi_status
 312 acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
 313                             acpi_string * new_val)
 314 {
 315         if (!init_val || !new_val)
 316                 return AE_BAD_PARAMETER;
 317
 318         *new_val = NULL;
 319         if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) {
 320                 printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n",
 321                        acpi_os_name);
 322                 *new_val = acpi_os_name;
 323         }
 324
 325         return AE_OK;
 326 }
 327
 328 acpi_status
 329 acpi_os_table_override(struct acpi_table_header * existing_table,
 330                        struct acpi_table_header ** new_table)
 331 {
 332         if (!existing_table || !new_table)
 333                 return AE_BAD_PARAMETER;
 334
 335         *new_table = NULL;
 336
 337 #ifdef CONFIG_ACPI_CUSTOM_DSDT
 338         if (strncmp(existing_table->signature, "DSDT", 4) == 0)
 339                 *new_table = (struct acpi_table_header *)AmlCode;
 340 #endif
 341         if (*new_table != NULL) {
 342                 printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], "
 343                            "this is unsafe: tainting kernel\n",
 344                        existing_table->signature,
 345                        existing_table->oem_table_id);
 346                 add_taint(TAINT_OVERRIDDEN_ACPI_TABLE);
 347         }
 348         return AE_OK;
 349 }
 350
 351 static irqreturn_t acpi_irq(int irq, void *dev_id)
 352 {
 353         u32 handled;
 354
 355         handled = (*acpi_irq_handler) (acpi_irq_context);
 356
 357         if (handled) {
 358                 acpi_irq_handled++;
 359                 return IRQ_HANDLED;
 360         } else {
 361                 acpi_irq_not_handled++;
 362                 return IRQ_NONE;
 363         }
 364 }
 365
 366 acpi_status
 367 acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
 368                                   void *context)
 369 {
 370         unsigned int irq;
 371
 372         acpi_irq_stats_init();
 373
 374         /*
 375          * Ignore the GSI from the core, and use the value in our copy of the
 376          * FADT. It may not be the same if an interrupt source override exists
 377          * for the SCI.
 378          */
 379         gsi = acpi_gbl_FADT.sci_interrupt;
 380         if (acpi_gsi_to_irq(gsi, &irq) < 0) {
 381                 printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n",
 382                        gsi);
 383                 return AE_OK;
 384         }
 385
 386         acpi_irq_handler = handler;
 387         acpi_irq_context = context;
 388         if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) {
 389                 printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq);
 390                 return AE_NOT_ACQUIRED;
 391         }
 392         acpi_irq_irq = irq;
 393
 394         return AE_OK;
 395 }
 396
 397 acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler)
 398 {
 399         if (irq) {
 400                 free_irq(irq, acpi_irq);
 401                 acpi_irq_handler = NULL;
 402                 acpi_irq_irq = 0;
 403         }
 404
 405         return AE_OK;
 406 }
 407
 408 /*
 409  * Running in interpreter thread context, safe to sleep
 410  */
 411
 412 void acpi_os_sleep(acpi_integer ms)
 413 {
 414         schedule_timeout_interruptible(msecs_to_jiffies(ms));
 415 }
 416
 417 void acpi_os_stall(u32 us)
 418 {
 419         while (us) {
 420                 u32 delay = 1000;
 421
 422                 if (delay > us)
 423                         delay = us;
 424                 udelay(delay);
 425                 touch_nmi_watchdog();
 426                 us -= delay;
 427         }
 428 }
 429
 430 /*
 431  * Support ACPI 3.0 AML Timer operand
 432  * Returns 64-bit free-running, monotonically increasing timer
 433  * with 100ns granularity
 434  */
 435 u64 acpi_os_get_timer(void)
 436 {
 437         static u64 t;
 438
 439 #ifdef  CONFIG_HPET
 440         /* TBD: use HPET if available */
 441 #endif
 442
 443 #ifdef  CONFIG_X86_PM_TIMER
 444         /* TBD: default to PM timer if HPET was not available */
 445 #endif
 446         if (!t)
 447                 printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n");
 448
 449         return ++t;
 450 }
 451
 452 acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
 453 {
 454         u32 dummy;
 455
 456         if (!value)
 457                 value = &dummy;
 458
 459         *value = 0;
 460         if (width <= 8) {
 461                 *(u8 *) value = inb(port);
 462         } else if (width <= 16) {
 463                 *(u16 *) value = inw(port);
 464         } else if (width <= 32) {
 465                 *(u32 *) value = inl(port);
 466         } else {
 467                 BUG();
 468         }
 469
 470         return AE_OK;
 471 }
 472
 473 EXPORT_SYMBOL(acpi_os_read_port);
 474
 475 acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
 476 {
 477         if (width <= 8) {
 478                 outb(value, port);
 479         } else if (width <= 16) {
 480                 outw(value, port);
 481         } else if (width <= 32) {
 482                 outl(value, port);
 483         } else {
 484                 BUG();
 485         }
 486
 487         return AE_OK;
 488 }
 489
 490 EXPORT_SYMBOL(acpi_os_write_port);
 491
 492 acpi_status
 493 acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width)
 494 {
 495         u32 dummy;
 496         void __iomem *virt_addr;
 497
 498         virt_addr = ioremap(phys_addr, width);
 499         if (!value)
 500                 value = &dummy;
 501
 502         switch (width) {
 503         case 8:
 504                 *(u8 *) value = readb(virt_addr);
 505                 break;
 506         case 16:
 507                 *(u16 *) value = readw(virt_addr);
 508                 break;
 509         case 32:
 510                 *(u32 *) value = readl(virt_addr);
 511                 break;
 512         default:
 513                 BUG();
 514         }
 515
 516         iounmap(virt_addr);
 517
 518         return AE_OK;
 519 }
 520
 521 acpi_status
 522 acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width)
 523 {
 524         void __iomem *virt_addr;
 525
 526         virt_addr = ioremap(phys_addr, width);
 527
 528         switch (width) {
 529         case 8:
 530                 writeb(value, virt_addr);
 531                 break;
 532         case 16:
 533                 writew(value, virt_addr);
 534                 break;
 535         case 32:
 536                 writel(value, virt_addr);
 537                 break;
 538         default:
 539                 BUG();
 540         }
 541
 542         iounmap(virt_addr);
 543
 544         return AE_OK;
 545 }
 546
 547 acpi_status
 548 acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
 549                                u32 *value, u32 width)
 550 {
 551         int result, size;
 552
 553         if (!value)
 554                 return AE_BAD_PARAMETER;
 555
 556         switch (width) {
 557         case 8:
 558                 size = 1;
 559                 break;
 560         case 16:
 561                 size = 2;
 562                 break;
 563         case 32:
 564                 size = 4;
 565                 break;
 566         default:
 567                 return AE_ERROR;
 568         }
 569
 570         result = raw_pci_read(pci_id->segment, pci_id->bus,
 571                                 PCI_DEVFN(pci_id->device, pci_id->function),
 572                                 reg, size, value);
 573
 574         return (result ? AE_ERROR : AE_OK);
 575 }
 576
 577 acpi_status
 578 acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
 579                                 acpi_integer value, u32 width)
 580 {
 581         int result, size;
 582
 583         switch (width) {
 584         case 8:
 585                 size = 1;
 586                 break;
 587         case 16:
 588                 size = 2;
 589                 break;
 590         case 32:
 591                 size = 4;
 592                 break;
 593         default:
 594                 return AE_ERROR;
 595         }
 596
 597         result = raw_pci_write(pci_id->segment, pci_id->bus,
 598                                 PCI_DEVFN(pci_id->device, pci_id->function),
 599                                 reg, size, value);
 600
 601         return (result ? AE_ERROR : AE_OK);
 602 }
 603
 604 /* TODO: Change code to take advantage of driver model more */
 605 static void acpi_os_derive_pci_id_2(acpi_handle rhandle,        /* upper bound  */
 606                                     acpi_handle chandle,        /* current node */
 607                                     struct acpi_pci_id **id,
 608                                     int *is_bridge, u8 * bus_number)
 609 {
 610         acpi_handle handle;
 611         struct acpi_pci_id *pci_id = *id;
 612         acpi_status status;
 613         unsigned long long temp;
 614         acpi_object_type type;
 615
 616         acpi_get_parent(chandle, &handle);
 617         if (handle != rhandle) {
 618                 acpi_os_derive_pci_id_2(rhandle, handle, &pci_id, is_bridge,
 619                                         bus_number);
 620
 621                 status = acpi_get_type(handle, &type);
 622                 if ((ACPI_FAILURE(status)) || (type != ACPI_TYPE_DEVICE))
 623                         return;
 624
 625                 status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL,
 626                                           &temp);
 627                 if (ACPI_SUCCESS(status)) {
 628                         u32 val;
 629                         pci_id->device = ACPI_HIWORD(ACPI_LODWORD(temp));
 630                         pci_id->function = ACPI_LOWORD(ACPI_LODWORD(temp));
 631
 632                         if (*is_bridge)
 633                                 pci_id->bus = *bus_number;
 634
 635                         /* any nicer way to get bus number of bridge ? */
 636                         status =
 637                             acpi_os_read_pci_configuration(pci_id, 0x0e, &val,
 638                                                            8);
 639                         if (ACPI_SUCCESS(status)
 640                             && ((val & 0x7f) == 1 || (val & 0x7f) == 2)) {
 641                                 status =
 642                                     acpi_os_read_pci_configuration(pci_id, 0x18,
 643                                                                    &val, 8);
 644                                 if (!ACPI_SUCCESS(status)) {
 645                                         /* Certainly broken...  FIX ME */
 646                                         return;
 647                                 }
 648                                 *is_bridge = 1;
 649                                 pci_id->bus = val;
 650                                 status =
 651                                     acpi_os_read_pci_configuration(pci_id, 0x19,
 652                                                                    &val, 8);
 653                                 if (ACPI_SUCCESS(status)) {
 654                                         *bus_number = val;
 655                                 }
 656                         } else
 657                                 *is_bridge = 0;
 658                 }
 659         }
 660 }
 661
 662 void acpi_os_derive_pci_id(acpi_handle rhandle, /* upper bound  */
 663                            acpi_handle chandle, /* current node */
 664                            struct acpi_pci_id **id)
 665 {
 666         int is_bridge = 1;
 667         u8 bus_number = (*id)->bus;
 668
 669         acpi_os_derive_pci_id_2(rhandle, chandle, id, &is_bridge, &bus_number);
 670 }
 671
 672 static void acpi_os_execute_deferred(struct work_struct *work)
 673 {
 674         struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
 675         if (!dpc) {
 676                 printk(KERN_ERR PREFIX "Invalid (NULL) context\n");
 677                 return;
 678         }
 679
 680         dpc->function(dpc->context);
 681         kfree(dpc);
 682
 683         return;
 684 }
 685
 686 static void acpi_os_execute_hp_deferred(struct work_struct *work)
 687 {
 688         struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
 689         if (!dpc) {
 690                 printk(KERN_ERR PREFIX "Invalid (NULL) context\n");
 691                 return;
 692         }
 693
 694         acpi_os_wait_events_complete(NULL);
 695
 696         dpc->function(dpc->context);
 697         kfree(dpc);
 698
 699         return;
 700 }
 701
 702 /*******************************************************************************
 703  *
 704  * FUNCTION:    acpi_os_execute
 705  *
 706  * PARAMETERS:  Type               - Type of the callback
 707  *              Function           - Function to be executed
 708  *              Context            - Function parameters
 709  *
 710  * RETURN:      Status
 711  *
 712  * DESCRIPTION: Depending on type, either queues function for deferred execution or
 713  *              immediately executes function on a separate thread.
 714  *
 715  ******************************************************************************/
 716
 717 static acpi_status __acpi_os_execute(acpi_execute_type type,
 718         acpi_osd_exec_callback function, void *context, int hp)
 719 {
 720         acpi_status status = AE_OK;
 721         struct acpi_os_dpc *dpc;
 722         struct workqueue_struct *queue;
 723         work_func_t func;
 724         int ret;
 725         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 726                           "Scheduling function [%p(%p)] for deferred execution.\n",
 727                           function, context));
 728
 729         if (!function)
 730                 return AE_BAD_PARAMETER;
 731
 732         /*
 733          * Allocate/initialize DPC structure.  Note that this memory will be
 734          * freed by the callee.  The kernel handles the work_struct list  in a
 735          * way that allows us to also free its memory inside the callee.
 736          * Because we may want to schedule several tasks with different
 737          * parameters we can't use the approach some kernel code uses of
 738          * having a static work_struct.
 739          */
 740
 741         dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC);
 742         if (!dpc)
 743                 return AE_NO_MEMORY;
 744
 745         dpc->function = function;
 746         dpc->context = context;
 747
 748         /*
 749          * We can't run hotplug code in keventd_wq/kacpid_wq/kacpid_notify_wq
 750          * because the hotplug code may call driver .remove() functions,
 751          * which invoke flush_scheduled_work/acpi_os_wait_events_complete
 752          * to flush these workqueues.
 753          */
 754         queue = hp ? kacpi_hotplug_wq :
 755                 (type == OSL_NOTIFY_HANDLER ? kacpi_notify_wq : kacpid_wq);
 756         func = hp ? acpi_os_execute_hp_deferred : acpi_os_execute_deferred;
 757         INIT_WORK(&dpc->work, func);
 758         ret = queue_work(queue, &dpc->work);
 759
 760         if (!ret) {
 761                 printk(KERN_ERR PREFIX
 762                           "Call to queue_work() failed.\n");
 763                 status = AE_ERROR;
 764                 kfree(dpc);
 765         }
 766         return status;
 767 }
 768
 769 acpi_status acpi_os_execute(acpi_execute_type type,
 770                             acpi_osd_exec_callback function, void *context)
 771 {
 772         return __acpi_os_execute(type, function, context, 0);
 773 }
 774 EXPORT_SYMBOL(acpi_os_execute);
 775
 776 acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function,
 777         void *context)
 778 {
 779         return __acpi_os_execute(0, function, context, 1);
 780 }
 781
 782 void acpi_os_wait_events_complete(void *context)
 783 {
 784         flush_workqueue(kacpid_wq);
 785         flush_workqueue(kacpi_notify_wq);
 786 }
 787
 788 EXPORT_SYMBOL(acpi_os_wait_events_complete);
 789
 790 /*
 791  * Allocate the memory for a spinlock and initialize it.
 792  */
 793 acpi_status acpi_os_create_lock(acpi_spinlock * handle)
 794 {
 795         spin_lock_init(*handle);
 796
 797         return AE_OK;
 798 }
 799
 800 /*
 801  * Deallocate the memory for a spinlock.
 802  */
 803 void acpi_os_delete_lock(acpi_spinlock handle)
 804 {
 805         return;
 806 }
 807
 808 acpi_status
 809 acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
 810 {
 811         struct semaphore *sem = NULL;
 812
 813         sem = acpi_os_allocate(sizeof(struct semaphore));
 814         if (!sem)
 815                 return AE_NO_MEMORY;
 816         memset(sem, 0, sizeof(struct semaphore));
 817
 818         sema_init(sem, initial_units);
 819
 820         *handle = (acpi_handle *) sem;
 821
 822         ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n",
 823                           *handle, initial_units));
 824
 825         return AE_OK;
 826 }
 827
 828 /*
 829  * TODO: A better way to delete semaphores?  Linux doesn't have a
 830  * 'delete_semaphore()' function -- may result in an invalid
 831  * pointer dereference for non-synchronized consumers.  Should
 832  * we at least check for blocked threads and signal/cancel them?
 833  */
 834
 835 acpi_status acpi_os_delete_semaphore(acpi_handle handle)
 836 {
 837         struct semaphore *sem = (struct semaphore *)handle;
 838
 839         if (!sem)
 840                 return AE_BAD_PARAMETER;
 841
 842         ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle));
 843
 844         BUG_ON(!list_empty(&sem->wait_list));
 845         kfree(sem);
 846         sem = NULL;
 847
 848         return AE_OK;
 849 }
 850
 851 /*
 852  * TODO: Support for units > 1?
 853  */
 854 acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
 855 {
 856         acpi_status status = AE_OK;
 857         struct semaphore *sem = (struct semaphore *)handle;
 858         long jiffies;
 859         int ret = 0;
 860
 861         if (!sem || (units < 1))
 862                 return AE_BAD_PARAMETER;
 863
 864         if (units > 1)
 865                 return AE_SUPPORT;
 866
 867         ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n",
 868                           handle, units, timeout));
 869
 870         if (timeout == ACPI_WAIT_FOREVER)
 871                 jiffies = MAX_SCHEDULE_TIMEOUT;
 872         else
 873                 jiffies = msecs_to_jiffies(timeout);
 874
 875         ret = down_timeout(sem, jiffies);
 876         if (ret)
 877                 status = AE_TIME;
 878
 879         if (ACPI_FAILURE(status)) {
 880                 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
 881                                   "Failed to acquire semaphore[%p|%d|%d], %s",
 882                                   handle, units, timeout,
 883                                   acpi_format_exception(status)));
 884         } else {
 885                 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
 886                                   "Acquired semaphore[%p|%d|%d]", handle,
 887                                   units, timeout));
 888         }
 889
 890         return status;
 891 }
 892
 893 /*
 894  * TODO: Support for units > 1?
 895  */
 896 acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
 897 {
 898         struct semaphore *sem = (struct semaphore *)handle;
 899
 900         if (!sem || (units < 1))
 901                 return AE_BAD_PARAMETER;
 902
 903         if (units > 1)
 904                 return AE_SUPPORT;
 905
 906         ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle,
 907                           units));
 908
 909         up(sem);
 910
 911         return AE_OK;
 912 }
 913
 914 #ifdef ACPI_FUTURE_USAGE
 915 u32 acpi_os_get_line(char *buffer)
 916 {
 917
 918 #ifdef ENABLE_DEBUGGER
 919         if (acpi_in_debugger) {
 920                 u32 chars;
 921
 922                 kdb_read(buffer, sizeof(line_buf));
 923
 924                 /* remove the CR kdb includes */
 925                 chars = strlen(buffer) - 1;
 926                 buffer[chars] = '\0';
 927         }
 928 #endif
 929
 930         return 0;
 931 }
 932 #endif                          /*  ACPI_FUTURE_USAGE  */
 933
 934 acpi_status acpi_os_signal(u32 function, void *info)
 935 {
 936         switch (function) {
 937         case ACPI_SIGNAL_FATAL:
 938                 printk(KERN_ERR PREFIX "Fatal opcode executed\n");
 939                 break;
 940         case ACPI_SIGNAL_BREAKPOINT:
 941                 /*
 942                  * AML Breakpoint
 943                  * ACPI spec. says to treat it as a NOP unless
 944                  * you are debugging.  So if/when we integrate
 945                  * AML debugger into the kernel debugger its
 946                  * hook will go here.  But until then it is
 947                  * not useful to print anything on breakpoints.
 948                  */
 949                 break;
 950         default:
 951                 break;
 952         }
 953
 954         return AE_OK;
 955 }
 956
 957 static int __init acpi_os_name_setup(char *str)
 958 {
 959         char *p = acpi_os_name;
 960         int count = ACPI_MAX_OVERRIDE_LEN - 1;
 961
 962         if (!str || !*str)
 963                 return 0;
 964
 965         for (; count-- && str && *str; str++) {
 966                 if (isalnum(*str) || *str == ' ' || *str == ':')
 967                         *p++ = *str;
 968                 else if (*str == '\'' || *str == '"')
 969                         continue;
 970                 else
 971                         break;
 972         }
 973         *p = 0;
 974
 975         return 1;
 976
 977 }
 978
 979 __setup("acpi_os_name=", acpi_os_name_setup);
 980
 981 static void __init set_osi_linux(unsigned int enable)
 982 {
 983         if (osi_linux.enable != enable) {
 984                 osi_linux.enable = enable;
 985                 printk(KERN_NOTICE PREFIX "%sed _OSI(Linux)\n",
 986                         enable ? "Add": "Delet");
 987         }
 988         return;
 989 }
 990
 991 static void __init acpi_cmdline_osi_linux(unsigned int enable)
 992 {
 993         osi_linux.cmdline = 1;  /* cmdline set the default */
 994         set_osi_linux(enable);
 995
 996         return;
 997 }
 998
 999 void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d)
1000 {
1001         osi_linux.dmi = 1;      /* DMI knows that this box asks OSI(Linux) */
1002
1003         printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident);
1004
1005         if (enable == -1)
1006                 return;
1007
1008         osi_linux.known = 1;    /* DMI knows which OSI(Linux) default needed */
1009
1010         set_osi_linux(enable);
1011
1012         return;
1013 }
1014
1015 /*
1016  * Modify the list of "OS Interfaces" reported to BIOS via _OSI
1017  *
1018  * empty string disables _OSI
1019  * string starting with '!' disables that string
1020  * otherwise string is added to list, augmenting built-in strings
1021  */
1022 int __init acpi_osi_setup(char *str)
1023 {
1024         if (str == NULL || *str == '\0') {
1025                 printk(KERN_INFO PREFIX "_OSI method disabled\n");
1026                 acpi_gbl_create_osi_method = FALSE;
1027         } else if (!strcmp("!Linux", str)) {
1028                 acpi_cmdline_osi_linux(0);      /* !enable */
1029         } else if (*str == '!') {
1030                 if (acpi_osi_invalidate(++str) == AE_OK)
1031                         printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
1032         } else if (!strcmp("Linux", str)) {
1033                 acpi_cmdline_osi_linux(1);      /* enable */
1034         } else if (*osi_additional_string == '\0') {
1035                 strncpy(osi_additional_string, str, OSI_STRING_LENGTH_MAX);
1036                 printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
1037         }
1038
1039         return 1;
1040 }
1041
1042 __setup("acpi_osi=", acpi_osi_setup);
1043
1044 /* enable serialization to combat AE_ALREADY_EXISTS errors */
1045 static int __init acpi_serialize_setup(char *str)
1046 {
1047         printk(KERN_INFO PREFIX "serialize enabled\n");
1048
1049         acpi_gbl_all_methods_serialized = TRUE;
1050
1051         return 1;
1052 }
1053
1054 __setup("acpi_serialize", acpi_serialize_setup);
1055
1056 /*
1057  * Wake and Run-Time GPES are expected to be separate.
1058  * We disable wake-GPEs at run-time to prevent spurious
1059  * interrupts.
1060  *
1061  * However, if a system exists that shares Wake and
1062  * Run-time events on the same GPE this flag is available
1063  * to tell Linux to keep the wake-time GPEs enabled at run-time.
1064  */
1065 static int __init acpi_wake_gpes_always_on_setup(char *str)
1066 {
1067         printk(KERN_INFO PREFIX "wake GPEs not disabled\n");
1068
1069         acpi_gbl_leave_wake_gpes_disabled = FALSE;
1070
1071         return 1;
1072 }
1073
1074 __setup("acpi_wake_gpes_always_on", acpi_wake_gpes_always_on_setup);
1075
1076 /* Check of resource interference between native drivers and ACPI
1077  * OperationRegions (SystemIO and System Memory only).
1078  * IO ports and memory declared in ACPI might be used by the ACPI subsystem
1079  * in arbitrary AML code and can interfere with legacy drivers.
1080  * acpi_enforce_resources= can be set to:
1081  *
1082  *   - strict (default) (2)
1083  *     -> further driver trying to access the resources will not load
1084  *   - lax              (1)
1085  *     -> further driver trying to access the resources will load, but you
1086  *     get a system message that something might go wrong...
1087  *
1088  *   - no               (0)
1089  *     -> ACPI Operation Region resources will not be registered
1090  *
1091  */
1092 #define ENFORCE_RESOURCES_STRICT 2
1093 #define ENFORCE_RESOURCES_LAX    1
1094 #define ENFORCE_RESOURCES_NO     0
1095
1096 static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1097
1098 static int __init acpi_enforce_resources_setup(char *str)
1099 {
1100         if (str == NULL || *str == '\0')
1101                 return 0;
1102
1103         if (!strcmp("strict", str))
1104                 acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1105         else if (!strcmp("lax", str))
1106                 acpi_enforce_resources = ENFORCE_RESOURCES_LAX;
1107         else if (!strcmp("no", str))
1108                 acpi_enforce_resources = ENFORCE_RESOURCES_NO;
1109
1110         return 1;
1111 }
1112
1113 __setup("acpi_enforce_resources=", acpi_enforce_resources_setup);
1114
1115 /* Check for resource conflicts between ACPI OperationRegions and native
1116  * drivers */
1117 int acpi_check_resource_conflict(struct resource *res)
1118 {
1119         struct acpi_res_list *res_list_elem;
1120         int ioport;
1121         int clash = 0;
1122
1123         if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
1124                 return 0;
1125         if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM))
1126                 return 0;
1127
1128         ioport = res->flags & IORESOURCE_IO;
1129
1130         spin_lock(&acpi_res_lock);
1131         list_for_each_entry(res_list_elem, &resource_list_head,
1132                             resource_list) {
1133                 if (ioport && (res_list_elem->resource_type
1134                                != ACPI_ADR_SPACE_SYSTEM_IO))
1135                         continue;
1136                 if (!ioport && (res_list_elem->resource_type
1137                                 != ACPI_ADR_SPACE_SYSTEM_MEMORY))
1138                         continue;
1139
1140                 if (res->end < res_list_elem->start
1141                     || res_list_elem->end < res->start)
1142                         continue;
1143                 clash = 1;
1144                 break;
1145         }
1146         spin_unlock(&acpi_res_lock);
1147
1148         if (clash) {
1149                 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) {
1150                         printk("%sACPI: %s resource %s [0x%llx-0x%llx]"
1151                                " conflicts with ACPI region %s"
1152                                " [0x%llx-0x%llx]\n",
1153                                acpi_enforce_resources == ENFORCE_RESOURCES_LAX
1154                                ? KERN_WARNING : KERN_ERR,
1155                                ioport ? "I/O" : "Memory", res->name,
1156                                (long long) res->start, (long long) res->end,
1157                                res_list_elem->name,
1158                                (long long) res_list_elem->start,
1159                                (long long) res_list_elem->end);
1160                         printk(KERN_INFO "ACPI: Device needs an ACPI driver\n");
1161                 }
1162                 if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT)
1163                         return -EBUSY;
1164         }
1165         return 0;
1166 }
1167 EXPORT_SYMBOL(acpi_check_resource_conflict);
1168
1169 int acpi_check_region(resource_size_t start, resource_size_t n,
1170                       const char *name)
1171 {
1172         struct resource res = {
1173                 .start = start,
1174                 .end   = start + n - 1,
1175                 .name  = name,
1176                 .flags = IORESOURCE_IO,
1177         };
1178
1179         return acpi_check_resource_conflict(&res);
1180 }
1181 EXPORT_SYMBOL(acpi_check_region);
1182
1183 int acpi_check_mem_region(resource_size_t start, resource_size_t n,
1184                       const char *name)
1185 {
1186         struct resource res = {
1187                 .start = start,
1188                 .end   = start + n - 1,
1189                 .name  = name,
1190                 .flags = IORESOURCE_MEM,
1191         };
1192
1193         return acpi_check_resource_conflict(&res);
1194
1195 }
1196 EXPORT_SYMBOL(acpi_check_mem_region);
1197
1198 /*
1199  * Acquire a spinlock.
1200  *
1201  * handle is a pointer to the spinlock_t.
1202  */
1203
1204 acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp)
1205 {
1206         acpi_cpu_flags flags;
1207         spin_lock_irqsave(lockp, flags);
1208         return flags;
1209 }
1210
1211 /*
1212  * Release a spinlock. See above.
1213  */
1214
1215 void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags)
1216 {
1217         spin_unlock_irqrestore(lockp, flags);
1218 }
1219
1220 #ifndef ACPI_USE_LOCAL_CACHE
1221
1222 /*******************************************************************************
1223  *
1224  * FUNCTION:    acpi_os_create_cache
1225  *
1226  * PARAMETERS:  name      - Ascii name for the cache
1227  *              size      - Size of each cached object
1228  *              depth     - Maximum depth of the cache (in objects) <ignored>
1229  *              cache     - Where the new cache object is returned
1230  *
1231  * RETURN:      status
1232  *
1233  * DESCRIPTION: Create a cache object
1234  *
1235  ******************************************************************************/
1236
1237 acpi_status
1238 acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache)
1239 {
1240         *cache = kmem_cache_create(name, size, 0, 0, NULL);
1241         if (*cache == NULL)
1242                 return AE_ERROR;
1243         else
1244                 return AE_OK;
1245 }
1246
1247 /*******************************************************************************
1248  *
1249  * FUNCTION:    acpi_os_purge_cache
1250  *
1251  * PARAMETERS:  Cache           - Handle to cache object
1252  *
1253  * RETURN:      Status
1254  *
1255  * DESCRIPTION: Free all objects within the requested cache.
1256  *
1257  ******************************************************************************/
1258
1259 acpi_status acpi_os_purge_cache(acpi_cache_t * cache)
1260 {
1261         kmem_cache_shrink(cache);
1262         return (AE_OK);
1263 }
1264
1265 /*******************************************************************************
1266  *
1267  * FUNCTION:    acpi_os_delete_cache
1268  *
1269  * PARAMETERS:  Cache           - Handle to cache object
1270  *
1271  * RETURN:      Status
1272  *
1273  * DESCRIPTION: Free all objects within the requested cache and delete the
1274  *              cache object.
1275  *
1276  ******************************************************************************/
1277
1278 acpi_status acpi_os_delete_cache(acpi_cache_t * cache)
1279 {
1280         kmem_cache_destroy(cache);
1281         return (AE_OK);
1282 }
1283
1284 /*******************************************************************************
1285  *
1286  * FUNCTION:    acpi_os_release_object
1287  *
1288  * PARAMETERS:  Cache       - Handle to cache object
1289  *              Object      - The object to be released
1290  *
1291  * RETURN:      None
1292  *
1293  * DESCRIPTION: Release an object to the specified cache.  If cache is full,
1294  *              the object is deleted.
1295  *
1296  ******************************************************************************/
1297
1298 acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)
1299 {
1300         kmem_cache_free(cache, object);
1301         return (AE_OK);
1302 }
1303
1304 /******************************************************************************
1305  *
1306  * FUNCTION:    acpi_os_validate_interface
1307  *
1308  * PARAMETERS:  interface           - Requested interface to be validated
1309  *
1310  * RETURN:      AE_OK if interface is supported, AE_SUPPORT otherwise
1311  *
1312  * DESCRIPTION: Match an interface string to the interfaces supported by the
1313  *              host. Strings originate from an AML call to the _OSI method.
1314  *
1315  *****************************************************************************/
1316
1317 acpi_status
1318 acpi_os_validate_interface (char *interface)
1319 {
1320         if (!strncmp(osi_additional_string, interface, OSI_STRING_LENGTH_MAX))
1321                 return AE_OK;
1322         if (!strcmp("Linux", interface)) {
1323
1324                 printk(KERN_NOTICE PREFIX
1325                         "BIOS _OSI(Linux) query %s%s\n",
1326                         osi_linux.enable ? "honored" : "ignored",
1327                         osi_linux.cmdline ? " via cmdline" :
1328                         osi_linux.dmi ? " via DMI" : "");
1329
1330                 if (osi_linux.enable)
1331                         return AE_OK;
1332         }
1333         return AE_SUPPORT;
1334 }
1335
1336 /******************************************************************************
1337  *
1338  * FUNCTION:    acpi_os_validate_address
1339  *
1340  * PARAMETERS:  space_id             - ACPI space ID
1341  *              address             - Physical address
1342  *              length              - Address length
1343  *
1344  * RETURN:      AE_OK if address/length is valid for the space_id. Otherwise,
1345  *              should return AE_AML_ILLEGAL_ADDRESS.
1346  *
1347  * DESCRIPTION: Validate a system address via the host OS. Used to validate
1348  *              the addresses accessed by AML operation regions.
1349  *
1350  *****************************************************************************/
1351
1352 acpi_status
1353 acpi_os_validate_address (
1354     u8                   space_id,
1355     acpi_physical_address   address,
1356     acpi_size               length,
1357     char *name)
1358 {
1359         struct acpi_res_list *res;
1360         if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
1361                 return AE_OK;
1362
1363         switch (space_id) {
1364         case ACPI_ADR_SPACE_SYSTEM_IO:
1365         case ACPI_ADR_SPACE_SYSTEM_MEMORY:
1366                 /* Only interference checks against SystemIO and SytemMemory
1367                    are needed */
1368                 res = kzalloc(sizeof(struct acpi_res_list), GFP_KERNEL);
1369                 if (!res)
1370                         return AE_OK;
1371                 /* ACPI names are fixed to 4 bytes, still better use strlcpy */
1372                 strlcpy(res->name, name, 5);
1373                 res->start = address;
1374                 res->end = address + length - 1;
1375                 res->resource_type = space_id;
1376                 spin_lock(&acpi_res_lock);
1377                 list_add(&res->resource_list, &resource_list_head);
1378                 spin_unlock(&acpi_res_lock);
1379                 pr_debug("Added %s resource: start: 0x%llx, end: 0x%llx, "
1380                          "name: %s\n", (space_id == ACPI_ADR_SPACE_SYSTEM_IO)
1381                          ? "SystemIO" : "System Memory",
1382                          (unsigned long long)res->start,
1383                          (unsigned long long)res->end,
1384                          res->name);
1385                 break;
1386         case ACPI_ADR_SPACE_PCI_CONFIG:
1387         case ACPI_ADR_SPACE_EC:
1388         case ACPI_ADR_SPACE_SMBUS:
1389         case ACPI_ADR_SPACE_CMOS:
1390         case ACPI_ADR_SPACE_PCI_BAR_TARGET:
1391         case ACPI_ADR_SPACE_DATA_TABLE:
1392         case ACPI_ADR_SPACE_FIXED_HARDWARE:
1393                 break;
1394         }
1395         return AE_OK;
1396 }
1397
1398 #endif