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  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  23  *
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/kernel.h>
  28 #include <linux/slab.h>
  29 #include <linux/mm.h>
  30 #include <linux/highmem.h>
  31 #include <linux/pci.h>
  32 #include <linux/interrupt.h>
  33 #include <linux/kmod.h>
  34 #include <linux/delay.h>
  35 #include <linux/workqueue.h>
  36 #include <linux/nmi.h>
  37 #include <linux/acpi.h>
  38 #include <linux/efi.h>
  39 #include <linux/ioport.h>
  40 #include <linux/list.h>
  41 #include <linux/jiffies.h>
  42 #include <linux/semaphore.h>
  43
  44 #include <asm/io.h>
  45 #include <asm/uaccess.h>
  46 #include <linux/io-64-nonatomic-lo-hi.h>
  47
  48 #include "internal.h"
  49
  50 #define _COMPONENT              ACPI_OS_SERVICES
  51 ACPI_MODULE_NAME("osl");
  52
  53 struct acpi_os_dpc {
  54         acpi_osd_exec_callback function;
  55         void *context;
  56         struct work_struct work;
  57 };
  58
  59 #ifdef CONFIG_ACPI_CUSTOM_DSDT
  60 #include CONFIG_ACPI_CUSTOM_DSDT_FILE
  61 #endif
  62
  63 #ifdef ENABLE_DEBUGGER
  64 #include <linux/kdb.h>
  65
  66 /* stuff for debugger support */
  67 int acpi_in_debugger;
  68 EXPORT_SYMBOL(acpi_in_debugger);
  69 #endif                          /*ENABLE_DEBUGGER */
  70
  71 static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl,
  72                                       u32 pm1b_ctrl);
  73 static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a,
  74                                       u32 val_b);
  75
  76 static acpi_osd_handler acpi_irq_handler;
  77 static void *acpi_irq_context;
  78 static struct workqueue_struct *kacpid_wq;
  79 static struct workqueue_struct *kacpi_notify_wq;
  80 static struct workqueue_struct *kacpi_hotplug_wq;
  81 static bool acpi_os_initialized;
  82 unsigned int acpi_sci_irq = INVALID_ACPI_IRQ;
  83
  84 /*
  85  * This list of permanent mappings is for memory that may be accessed from
  86  * interrupt context, where we can't do the ioremap().
  87  */
  88 struct acpi_ioremap {
  89         struct list_head list;
  90         void __iomem *virt;
  91         acpi_physical_address phys;
  92         acpi_size size;
  93         unsigned long refcount;
  94 };
  95
  96 static LIST_HEAD(acpi_ioremaps);
  97 static DEFINE_MUTEX(acpi_ioremap_lock);
  98
  99 static void __init acpi_osi_setup_late(void);
 100
 101 /*
 102  * The story of _OSI(Linux)
 103  *
 104  * From pre-history through Linux-2.6.22,
 105  * Linux responded TRUE upon a BIOS OSI(Linux) query.
 106  *
 107  * Unfortunately, reference BIOS writers got wind of this
 108  * and put OSI(Linux) in their example code, quickly exposing
 109  * this string as ill-conceived and opening the door to
 110  * an un-bounded number of BIOS incompatibilities.
 111  *
 112  * For example, OSI(Linux) was used on resume to re-POST a
 113  * video card on one system, because Linux at that time
 114  * could not do a speedy restore in its native driver.
 115  * But then upon gaining quick native restore capability,
 116  * Linux has no way to tell the BIOS to skip the time-consuming
 117  * POST -- putting Linux at a permanent performance disadvantage.
 118  * On another system, the BIOS writer used OSI(Linux)
 119  * to infer native OS support for IPMI!  On other systems,
 120  * OSI(Linux) simply got in the way of Linux claiming to
 121  * be compatible with other operating systems, exposing
 122  * BIOS issues such as skipped device initialization.
 123  *
 124  * So "Linux" turned out to be a really poor chose of
 125  * OSI string, and from Linux-2.6.23 onward we respond FALSE.
 126  *
 127  * BIOS writers should NOT query _OSI(Linux) on future systems.
 128  * Linux will complain on the console when it sees it, and return FALSE.
 129  * To get Linux to return TRUE for your system  will require
 130  * a kernel source update to add a DMI entry,
 131  * or boot with "acpi_osi=Linux"
 132  */
 133
 134 static struct osi_linux {
 135         unsigned int    enable:1;
 136         unsigned int    dmi:1;
 137         unsigned int    cmdline:1;
 138         unsigned int    default_disabling:1;
 139 } osi_linux = {0, 0, 0, 0};
 140
 141 static u32 acpi_osi_handler(acpi_string interface, u32 supported)
 142 {
 143         if (!strcmp("Linux", interface)) {
 144
 145                 printk_once(KERN_NOTICE FW_BUG PREFIX
 146                         "BIOS _OSI(Linux) query %s%s\n",
 147                         osi_linux.enable ? "honored" : "ignored",
 148                         osi_linux.cmdline ? " via cmdline" :
 149                         osi_linux.dmi ? " via DMI" : "");
 150         }
 151
 152         if (!strcmp("Darwin", interface)) {
 153                 /*
 154                  * Apple firmware will behave poorly if it receives positive
 155                  * answers to "Darwin" and any other OS. Respond positively
 156                  * to Darwin and then disable all other vendor strings.
 157                  */
 158                 acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS);
 159                 supported = ACPI_UINT32_MAX;
 160         }
 161
 162         return supported;
 163 }
 164
 165 static void __init acpi_request_region (struct acpi_generic_address *gas,
 166         unsigned int length, char *desc)
 167 {
 168         u64 addr;
 169
 170         /* Handle possible alignment issues */
 171         memcpy(&addr, &gas->address, sizeof(addr));
 172         if (!addr || !length)
 173                 return;
 174
 175         /* Resources are never freed */
 176         if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO)
 177                 request_region(addr, length, desc);
 178         else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
 179                 request_mem_region(addr, length, desc);
 180 }
 181
 182 static int __init acpi_reserve_resources(void)
 183 {
 184         acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length,
 185                 "ACPI PM1a_EVT_BLK");
 186
 187         acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length,
 188                 "ACPI PM1b_EVT_BLK");
 189
 190         acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length,
 191                 "ACPI PM1a_CNT_BLK");
 192
 193         acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length,
 194                 "ACPI PM1b_CNT_BLK");
 195
 196         if (acpi_gbl_FADT.pm_timer_length == 4)
 197                 acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR");
 198
 199         acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length,
 200                 "ACPI PM2_CNT_BLK");
 201
 202         /* Length of GPE blocks must be a non-negative multiple of 2 */
 203
 204         if (!(acpi_gbl_FADT.gpe0_block_length & 0x1))
 205                 acpi_request_region(&acpi_gbl_FADT.xgpe0_block,
 206                                acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK");
 207
 208         if (!(acpi_gbl_FADT.gpe1_block_length & 0x1))
 209                 acpi_request_region(&acpi_gbl_FADT.xgpe1_block,
 210                                acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK");
 211
 212         return 0;
 213 }
 214 fs_initcall_sync(acpi_reserve_resources);
 215
 216 void acpi_os_printf(const char *fmt, ...)
 217 {
 218         va_list args;
 219         va_start(args, fmt);
 220         acpi_os_vprintf(fmt, args);
 221         va_end(args);
 222 }
 223 EXPORT_SYMBOL(acpi_os_printf);
 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         if (acpi_debugger_write_log(buffer) < 0)
 239                 printk(KERN_CONT "%s", buffer);
 240 #endif
 241 }
 242
 243 #ifdef CONFIG_KEXEC
 244 static unsigned long acpi_rsdp;
 245 static int __init setup_acpi_rsdp(char *arg)
 246 {
 247         if (kstrtoul(arg, 16, &acpi_rsdp))
 248                 return -EINVAL;
 249         return 0;
 250 }
 251 early_param("acpi_rsdp", setup_acpi_rsdp);
 252 #endif
 253
 254 acpi_physical_address __init acpi_os_get_root_pointer(void)
 255 {
 256 #ifdef CONFIG_KEXEC
 257         if (acpi_rsdp)
 258                 return acpi_rsdp;
 259 #endif
 260
 261         if (efi_enabled(EFI_CONFIG_TABLES)) {
 262                 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
 263                         return efi.acpi20;
 264                 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
 265                         return efi.acpi;
 266                 else {
 267                         printk(KERN_ERR PREFIX
 268                                "System description tables not found\n");
 269                         return 0;
 270                 }
 271         } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) {
 272                 acpi_physical_address pa = 0;
 273
 274                 acpi_find_root_pointer(&pa);
 275                 return pa;
 276         }
 277
 278         return 0;
 279 }
 280
 281 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
 282 static struct acpi_ioremap *
 283 acpi_map_lookup(acpi_physical_address phys, acpi_size size)
 284 {
 285         struct acpi_ioremap *map;
 286
 287         list_for_each_entry_rcu(map, &acpi_ioremaps, list)
 288                 if (map->phys <= phys &&
 289                     phys + size <= map->phys + map->size)
 290                         return map;
 291
 292         return NULL;
 293 }
 294
 295 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
 296 static void __iomem *
 297 acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size)
 298 {
 299         struct acpi_ioremap *map;
 300
 301         map = acpi_map_lookup(phys, size);
 302         if (map)
 303                 return map->virt + (phys - map->phys);
 304
 305         return NULL;
 306 }
 307
 308 void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size)
 309 {
 310         struct acpi_ioremap *map;
 311         void __iomem *virt = NULL;
 312
 313         mutex_lock(&acpi_ioremap_lock);
 314         map = acpi_map_lookup(phys, size);
 315         if (map) {
 316                 virt = map->virt + (phys - map->phys);
 317                 map->refcount++;
 318         }
 319         mutex_unlock(&acpi_ioremap_lock);
 320         return virt;
 321 }
 322 EXPORT_SYMBOL_GPL(acpi_os_get_iomem);
 323
 324 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
 325 static struct acpi_ioremap *
 326 acpi_map_lookup_virt(void __iomem *virt, acpi_size size)
 327 {
 328         struct acpi_ioremap *map;
 329
 330         list_for_each_entry_rcu(map, &acpi_ioremaps, list)
 331                 if (map->virt <= virt &&
 332                     virt + size <= map->virt + map->size)
 333                         return map;
 334
 335         return NULL;
 336 }
 337
 338 #if defined(CONFIG_IA64) || defined(CONFIG_ARM64)
 339 /* ioremap will take care of cache attributes */
 340 #define should_use_kmap(pfn)   0
 341 #else
 342 #define should_use_kmap(pfn)   page_is_ram(pfn)
 343 #endif
 344
 345 static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz)
 346 {
 347         unsigned long pfn;
 348
 349         pfn = pg_off >> PAGE_SHIFT;
 350         if (should_use_kmap(pfn)) {
 351                 if (pg_sz > PAGE_SIZE)
 352                         return NULL;
 353                 return (void __iomem __force *)kmap(pfn_to_page(pfn));
 354         } else
 355                 return acpi_os_ioremap(pg_off, pg_sz);
 356 }
 357
 358 static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr)
 359 {
 360         unsigned long pfn;
 361
 362         pfn = pg_off >> PAGE_SHIFT;
 363         if (should_use_kmap(pfn))
 364                 kunmap(pfn_to_page(pfn));
 365         else
 366                 iounmap(vaddr);
 367 }
 368
 369 void __iomem *__init_refok
 370 acpi_os_map_iomem(acpi_physical_address phys, acpi_size size)
 371 {
 372         struct acpi_ioremap *map;
 373         void __iomem *virt;
 374         acpi_physical_address pg_off;
 375         acpi_size pg_sz;
 376
 377         if (phys > ULONG_MAX) {
 378                 printk(KERN_ERR PREFIX "Cannot map memory that high\n");
 379                 return NULL;
 380         }
 381
 382         if (!acpi_gbl_permanent_mmap)
 383                 return __acpi_map_table((unsigned long)phys, size);
 384
 385         mutex_lock(&acpi_ioremap_lock);
 386         /* Check if there's a suitable mapping already. */
 387         map = acpi_map_lookup(phys, size);
 388         if (map) {
 389                 map->refcount++;
 390                 goto out;
 391         }
 392
 393         map = kzalloc(sizeof(*map), GFP_KERNEL);
 394         if (!map) {
 395                 mutex_unlock(&acpi_ioremap_lock);
 396                 return NULL;
 397         }
 398
 399         pg_off = round_down(phys, PAGE_SIZE);
 400         pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off;
 401         virt = acpi_map(pg_off, pg_sz);
 402         if (!virt) {
 403                 mutex_unlock(&acpi_ioremap_lock);
 404                 kfree(map);
 405                 return NULL;
 406         }
 407
 408         INIT_LIST_HEAD(&map->list);
 409         map->virt = virt;
 410         map->phys = pg_off;
 411         map->size = pg_sz;
 412         map->refcount = 1;
 413
 414         list_add_tail_rcu(&map->list, &acpi_ioremaps);
 415
 416 out:
 417         mutex_unlock(&acpi_ioremap_lock);
 418         return map->virt + (phys - map->phys);
 419 }
 420 EXPORT_SYMBOL_GPL(acpi_os_map_iomem);
 421
 422 void *__init_refok
 423 acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
 424 {
 425         return (void *)acpi_os_map_iomem(phys, size);
 426 }
 427 EXPORT_SYMBOL_GPL(acpi_os_map_memory);
 428
 429 static void acpi_os_drop_map_ref(struct acpi_ioremap *map)
 430 {
 431         if (!--map->refcount)
 432                 list_del_rcu(&map->list);
 433 }
 434
 435 static void acpi_os_map_cleanup(struct acpi_ioremap *map)
 436 {
 437         if (!map->refcount) {
 438                 synchronize_rcu_expedited();
 439                 acpi_unmap(map->phys, map->virt);
 440                 kfree(map);
 441         }
 442 }
 443
 444 void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size)
 445 {
 446         struct acpi_ioremap *map;
 447
 448         if (!acpi_gbl_permanent_mmap) {
 449                 __acpi_unmap_table(virt, size);
 450                 return;
 451         }
 452
 453         mutex_lock(&acpi_ioremap_lock);
 454         map = acpi_map_lookup_virt(virt, size);
 455         if (!map) {
 456                 mutex_unlock(&acpi_ioremap_lock);
 457                 WARN(true, PREFIX "%s: bad address %p\n", __func__, virt);
 458                 return;
 459         }
 460         acpi_os_drop_map_ref(map);
 461         mutex_unlock(&acpi_ioremap_lock);
 462
 463         acpi_os_map_cleanup(map);
 464 }
 465 EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem);
 466
 467 void __ref acpi_os_unmap_memory(void *virt, acpi_size size)
 468 {
 469         return acpi_os_unmap_iomem((void __iomem *)virt, size);
 470 }
 471 EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
 472
 473 void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
 474 {
 475         if (!acpi_gbl_permanent_mmap)
 476                 __acpi_unmap_table(virt, size);
 477 }
 478
 479 int acpi_os_map_generic_address(struct acpi_generic_address *gas)
 480 {
 481         u64 addr;
 482         void __iomem *virt;
 483
 484         if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
 485                 return 0;
 486
 487         /* Handle possible alignment issues */
 488         memcpy(&addr, &gas->address, sizeof(addr));
 489         if (!addr || !gas->bit_width)
 490                 return -EINVAL;
 491
 492         virt = acpi_os_map_iomem(addr, gas->bit_width / 8);
 493         if (!virt)
 494                 return -EIO;
 495
 496         return 0;
 497 }
 498 EXPORT_SYMBOL(acpi_os_map_generic_address);
 499
 500 void acpi_os_unmap_generic_address(struct acpi_generic_address *gas)
 501 {
 502         u64 addr;
 503         struct acpi_ioremap *map;
 504
 505         if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
 506                 return;
 507
 508         /* Handle possible alignment issues */
 509         memcpy(&addr, &gas->address, sizeof(addr));
 510         if (!addr || !gas->bit_width)
 511                 return;
 512
 513         mutex_lock(&acpi_ioremap_lock);
 514         map = acpi_map_lookup(addr, gas->bit_width / 8);
 515         if (!map) {
 516                 mutex_unlock(&acpi_ioremap_lock);
 517                 return;
 518         }
 519         acpi_os_drop_map_ref(map);
 520         mutex_unlock(&acpi_ioremap_lock);
 521
 522         acpi_os_map_cleanup(map);
 523 }
 524 EXPORT_SYMBOL(acpi_os_unmap_generic_address);
 525
 526 #ifdef ACPI_FUTURE_USAGE
 527 acpi_status
 528 acpi_os_get_physical_address(void *virt, acpi_physical_address * phys)
 529 {
 530         if (!phys || !virt)
 531                 return AE_BAD_PARAMETER;
 532
 533         *phys = virt_to_phys(virt);
 534
 535         return AE_OK;
 536 }
 537 #endif
 538
 539 #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE
 540 static bool acpi_rev_override;
 541
 542 int __init acpi_rev_override_setup(char *str)
 543 {
 544         acpi_rev_override = true;
 545         return 1;
 546 }
 547 __setup("acpi_rev_override", acpi_rev_override_setup);
 548 #else
 549 #define acpi_rev_override       false
 550 #endif
 551
 552 #define ACPI_MAX_OVERRIDE_LEN 100
 553
 554 static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN];
 555
 556 acpi_status
 557 acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
 558                             char **new_val)
 559 {
 560         if (!init_val || !new_val)
 561                 return AE_BAD_PARAMETER;
 562
 563         *new_val = NULL;
 564         if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) {
 565                 printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n",
 566                        acpi_os_name);
 567                 *new_val = acpi_os_name;
 568         }
 569
 570         if (!memcmp(init_val->name, "_REV", 4) && acpi_rev_override) {
 571                 printk(KERN_INFO PREFIX "Overriding _REV return value to 5\n");
 572                 *new_val = (char *)5;
 573         }
 574
 575         return AE_OK;
 576 }
 577
 578 #ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
 579 #include <linux/earlycpio.h>
 580 #include <linux/memblock.h>
 581
 582 static u64 acpi_tables_addr;
 583 static int all_tables_size;
 584
 585 /* Copied from acpica/tbutils.c:acpi_tb_checksum() */
 586 static u8 __init acpi_table_checksum(u8 *buffer, u32 length)
 587 {
 588         u8 sum = 0;
 589         u8 *end = buffer + length;
 590
 591         while (buffer < end)
 592                 sum = (u8) (sum + *(buffer++));
 593         return sum;
 594 }
 595
 596 /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */
 597 static const char * const table_sigs[] = {
 598         ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ,
 599         ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT,
 600         ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF,
 601         ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET,
 602         ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI,
 603         ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA,
 604         ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT,
 605         ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT,
 606         ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL };
 607
 608 #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
 609
 610 #define ACPI_OVERRIDE_TABLES 64
 611 static struct cpio_data __initdata acpi_initrd_files[ACPI_OVERRIDE_TABLES];
 612
 613 #define MAP_CHUNK_SIZE   (NR_FIX_BTMAPS << PAGE_SHIFT)
 614
 615 void __init acpi_initrd_override(void *data, size_t size)
 616 {
 617         int sig, no, table_nr = 0, total_offset = 0;
 618         long offset = 0;
 619         struct acpi_table_header *table;
 620         char cpio_path[32] = "kernel/firmware/acpi/";
 621         struct cpio_data file;
 622
 623         if (data == NULL || size == 0)
 624                 return;
 625
 626         for (no = 0; no < ACPI_OVERRIDE_TABLES; no++) {
 627                 file = find_cpio_data(cpio_path, data, size, &offset);
 628                 if (!file.data)
 629                         break;
 630
 631                 data += offset;
 632                 size -= offset;
 633
 634                 if (file.size < sizeof(struct acpi_table_header)) {
 635                         pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n",
 636                                 cpio_path, file.name);
 637                         continue;
 638                 }
 639
 640                 table = file.data;
 641
 642                 for (sig = 0; table_sigs[sig]; sig++)
 643                         if (!memcmp(table->signature, table_sigs[sig], 4))
 644                                 break;
 645
 646                 if (!table_sigs[sig]) {
 647                         pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n",
 648                                 cpio_path, file.name);
 649                         continue;
 650                 }
 651                 if (file.size != table->length) {
 652                         pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n",
 653                                 cpio_path, file.name);
 654                         continue;
 655                 }
 656                 if (acpi_table_checksum(file.data, table->length)) {
 657                         pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n",
 658                                 cpio_path, file.name);
 659                         continue;
 660                 }
 661
 662                 pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n",
 663                         table->signature, cpio_path, file.name, table->length);
 664
 665                 all_tables_size += table->length;
 666                 acpi_initrd_files[table_nr].data = file.data;
 667                 acpi_initrd_files[table_nr].size = file.size;
 668                 table_nr++;
 669         }
 670         if (table_nr == 0)
 671                 return;
 672
 673         acpi_tables_addr =
 674                 memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT,
 675                                        all_tables_size, PAGE_SIZE);
 676         if (!acpi_tables_addr) {
 677                 WARN_ON(1);
 678                 return;
 679         }
 680         /*
 681          * Only calling e820_add_reserve does not work and the
 682          * tables are invalid (memory got used) later.
 683          * memblock_reserve works as expected and the tables won't get modified.
 684          * But it's not enough on X86 because ioremap will
 685          * complain later (used by acpi_os_map_memory) that the pages
 686          * that should get mapped are not marked "reserved".
 687          * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area)
 688          * works fine.
 689          */
 690         memblock_reserve(acpi_tables_addr, all_tables_size);
 691         arch_reserve_mem_area(acpi_tables_addr, all_tables_size);
 692
 693         /*
 694          * early_ioremap only can remap 256k one time. If we map all
 695          * tables one time, we will hit the limit. Need to map chunks
 696          * one by one during copying the same as that in relocate_initrd().
 697          */
 698         for (no = 0; no < table_nr; no++) {
 699                 unsigned char *src_p = acpi_initrd_files[no].data;
 700                 phys_addr_t size = acpi_initrd_files[no].size;
 701                 phys_addr_t dest_addr = acpi_tables_addr + total_offset;
 702                 phys_addr_t slop, clen;
 703                 char *dest_p;
 704
 705                 total_offset += size;
 706
 707                 while (size) {
 708                         slop = dest_addr & ~PAGE_MASK;
 709                         clen = size;
 710                         if (clen > MAP_CHUNK_SIZE - slop)
 711                                 clen = MAP_CHUNK_SIZE - slop;
 712                         dest_p = early_ioremap(dest_addr & PAGE_MASK,
 713                                                  clen + slop);
 714                         memcpy(dest_p + slop, src_p, clen);
 715                         early_iounmap(dest_p, clen + slop);
 716                         src_p += clen;
 717                         dest_addr += clen;
 718                         size -= clen;
 719                 }
 720         }
 721 }
 722 #endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */
 723
 724 static void acpi_table_taint(struct acpi_table_header *table)
 725 {
 726         pr_warn(PREFIX
 727                 "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n",
 728                 table->signature, table->oem_table_id);
 729         add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE);
 730 }
 731
 732
 733 acpi_status
 734 acpi_os_table_override(struct acpi_table_header * existing_table,
 735                        struct acpi_table_header ** new_table)
 736 {
 737         if (!existing_table || !new_table)
 738                 return AE_BAD_PARAMETER;
 739
 740         *new_table = NULL;
 741
 742 #ifdef CONFIG_ACPI_CUSTOM_DSDT
 743         if (strncmp(existing_table->signature, "DSDT", 4) == 0)
 744                 *new_table = (struct acpi_table_header *)AmlCode;
 745 #endif
 746         if (*new_table != NULL)
 747                 acpi_table_taint(existing_table);
 748         return AE_OK;
 749 }
 750
 751 acpi_status
 752 acpi_os_physical_table_override(struct acpi_table_header *existing_table,
 753                                 acpi_physical_address *address,
 754                                 u32 *table_length)
 755 {
 756 #ifndef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
 757         *table_length = 0;
 758         *address = 0;
 759         return AE_OK;
 760 #else
 761         int table_offset = 0;
 762         struct acpi_table_header *table;
 763
 764         *table_length = 0;
 765         *address = 0;
 766
 767         if (!acpi_tables_addr)
 768                 return AE_OK;
 769
 770         do {
 771                 if (table_offset + ACPI_HEADER_SIZE > all_tables_size) {
 772                         WARN_ON(1);
 773                         return AE_OK;
 774                 }
 775
 776                 table = acpi_os_map_memory(acpi_tables_addr + table_offset,
 777                                            ACPI_HEADER_SIZE);
 778
 779                 if (table_offset + table->length > all_tables_size) {
 780                         acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
 781                         WARN_ON(1);
 782                         return AE_OK;
 783                 }
 784
 785                 table_offset += table->length;
 786
 787                 if (memcmp(existing_table->signature, table->signature, 4)) {
 788                         acpi_os_unmap_memory(table,
 789                                      ACPI_HEADER_SIZE);
 790                         continue;
 791                 }
 792
 793                 /* Only override tables with matching oem id */
 794                 if (memcmp(table->oem_table_id, existing_table->oem_table_id,
 795                            ACPI_OEM_TABLE_ID_SIZE)) {
 796                         acpi_os_unmap_memory(table,
 797                                      ACPI_HEADER_SIZE);
 798                         continue;
 799                 }
 800
 801                 table_offset -= table->length;
 802                 *table_length = table->length;
 803                 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
 804                 *address = acpi_tables_addr + table_offset;
 805                 break;
 806         } while (table_offset + ACPI_HEADER_SIZE < all_tables_size);
 807
 808         if (*address != 0)
 809                 acpi_table_taint(existing_table);
 810         return AE_OK;
 811 #endif
 812 }
 813
 814 static irqreturn_t acpi_irq(int irq, void *dev_id)
 815 {
 816         u32 handled;
 817
 818         handled = (*acpi_irq_handler) (acpi_irq_context);
 819
 820         if (handled) {
 821                 acpi_irq_handled++;
 822                 return IRQ_HANDLED;
 823         } else {
 824                 acpi_irq_not_handled++;
 825                 return IRQ_NONE;
 826         }
 827 }
 828
 829 acpi_status
 830 acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
 831                                   void *context)
 832 {
 833         unsigned int irq;
 834
 835         acpi_irq_stats_init();
 836
 837         /*
 838          * ACPI interrupts different from the SCI in our copy of the FADT are
 839          * not supported.
 840          */
 841         if (gsi != acpi_gbl_FADT.sci_interrupt)
 842                 return AE_BAD_PARAMETER;
 843
 844         if (acpi_irq_handler)
 845                 return AE_ALREADY_ACQUIRED;
 846
 847         if (acpi_gsi_to_irq(gsi, &irq) < 0) {
 848                 printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n",
 849                        gsi);
 850                 return AE_OK;
 851         }
 852
 853         acpi_irq_handler = handler;
 854         acpi_irq_context = context;
 855         if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) {
 856                 printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq);
 857                 acpi_irq_handler = NULL;
 858                 return AE_NOT_ACQUIRED;
 859         }
 860         acpi_sci_irq = irq;
 861
 862         return AE_OK;
 863 }
 864
 865 acpi_status acpi_os_remove_interrupt_handler(u32 gsi, acpi_osd_handler handler)
 866 {
 867         if (gsi != acpi_gbl_FADT.sci_interrupt || !acpi_sci_irq_valid())
 868                 return AE_BAD_PARAMETER;
 869
 870         free_irq(acpi_sci_irq, acpi_irq);
 871         acpi_irq_handler = NULL;
 872         acpi_sci_irq = INVALID_ACPI_IRQ;
 873
 874         return AE_OK;
 875 }
 876
 877 /*
 878  * Running in interpreter thread context, safe to sleep
 879  */
 880
 881 void acpi_os_sleep(u64 ms)
 882 {
 883         msleep(ms);
 884 }
 885
 886 void acpi_os_stall(u32 us)
 887 {
 888         while (us) {
 889                 u32 delay = 1000;
 890
 891                 if (delay > us)
 892                         delay = us;
 893                 udelay(delay);
 894                 touch_nmi_watchdog();
 895                 us -= delay;
 896         }
 897 }
 898
 899 /*
 900  * Support ACPI 3.0 AML Timer operand
 901  * Returns 64-bit free-running, monotonically increasing timer
 902  * with 100ns granularity
 903  */
 904 u64 acpi_os_get_timer(void)
 905 {
 906         u64 time_ns = ktime_to_ns(ktime_get());
 907         do_div(time_ns, 100);
 908         return time_ns;
 909 }
 910
 911 acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
 912 {
 913         u32 dummy;
 914
 915         if (!value)
 916                 value = &dummy;
 917
 918         *value = 0;
 919         if (width <= 8) {
 920                 *(u8 *) value = inb(port);
 921         } else if (width <= 16) {
 922                 *(u16 *) value = inw(port);
 923         } else if (width <= 32) {
 924                 *(u32 *) value = inl(port);
 925         } else {
 926                 BUG();
 927         }
 928
 929         return AE_OK;
 930 }
 931
 932 EXPORT_SYMBOL(acpi_os_read_port);
 933
 934 acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
 935 {
 936         if (width <= 8) {
 937                 outb(value, port);
 938         } else if (width <= 16) {
 939                 outw(value, port);
 940         } else if (width <= 32) {
 941                 outl(value, port);
 942         } else {
 943                 BUG();
 944         }
 945
 946         return AE_OK;
 947 }
 948
 949 EXPORT_SYMBOL(acpi_os_write_port);
 950
 951 acpi_status
 952 acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width)
 953 {
 954         void __iomem *virt_addr;
 955         unsigned int size = width / 8;
 956         bool unmap = false;
 957         u64 dummy;
 958
 959         rcu_read_lock();
 960         virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
 961         if (!virt_addr) {
 962                 rcu_read_unlock();
 963                 virt_addr = acpi_os_ioremap(phys_addr, size);
 964                 if (!virt_addr)
 965                         return AE_BAD_ADDRESS;
 966                 unmap = true;
 967         }
 968
 969         if (!value)
 970                 value = &dummy;
 971
 972         switch (width) {
 973         case 8:
 974                 *(u8 *) value = readb(virt_addr);
 975                 break;
 976         case 16:
 977                 *(u16 *) value = readw(virt_addr);
 978                 break;
 979         case 32:
 980                 *(u32 *) value = readl(virt_addr);
 981                 break;
 982         case 64:
 983                 *(u64 *) value = readq(virt_addr);
 984                 break;
 985         default:
 986                 BUG();
 987         }
 988
 989         if (unmap)
 990                 iounmap(virt_addr);
 991         else
 992                 rcu_read_unlock();
 993
 994         return AE_OK;
 995 }
 996
 997 acpi_status
 998 acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width)
 999 {
1000         void __iomem *virt_addr;
1001         unsigned int size = width / 8;
1002         bool unmap = false;
1003
1004         rcu_read_lock();
1005         virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
1006         if (!virt_addr) {
1007                 rcu_read_unlock();
1008                 virt_addr = acpi_os_ioremap(phys_addr, size);
1009                 if (!virt_addr)
1010                         return AE_BAD_ADDRESS;
1011                 unmap = true;
1012         }
1013
1014         switch (width) {
1015         case 8:
1016                 writeb(value, virt_addr);
1017                 break;
1018         case 16:
1019                 writew(value, virt_addr);
1020                 break;
1021         case 32:
1022                 writel(value, virt_addr);
1023                 break;
1024         case 64:
1025                 writeq(value, virt_addr);
1026                 break;
1027         default:
1028                 BUG();
1029         }
1030
1031         if (unmap)
1032                 iounmap(virt_addr);
1033         else
1034                 rcu_read_unlock();
1035
1036         return AE_OK;
1037 }
1038
1039 acpi_status
1040 acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
1041                                u64 *value, u32 width)
1042 {
1043         int result, size;
1044         u32 value32;
1045
1046         if (!value)
1047                 return AE_BAD_PARAMETER;
1048
1049         switch (width) {
1050         case 8:
1051                 size = 1;
1052                 break;
1053         case 16:
1054                 size = 2;
1055                 break;
1056         case 32:
1057                 size = 4;
1058                 break;
1059         default:
1060                 return AE_ERROR;
1061         }
1062
1063         result = raw_pci_read(pci_id->segment, pci_id->bus,
1064                                 PCI_DEVFN(pci_id->device, pci_id->function),
1065                                 reg, size, &value32);
1066         *value = value32;
1067
1068         return (result ? AE_ERROR : AE_OK);
1069 }
1070
1071 acpi_status
1072 acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
1073                                 u64 value, u32 width)
1074 {
1075         int result, size;
1076
1077         switch (width) {
1078         case 8:
1079                 size = 1;
1080                 break;
1081         case 16:
1082                 size = 2;
1083                 break;
1084         case 32:
1085                 size = 4;
1086                 break;
1087         default:
1088                 return AE_ERROR;
1089         }
1090
1091         result = raw_pci_write(pci_id->segment, pci_id->bus,
1092                                 PCI_DEVFN(pci_id->device, pci_id->function),
1093                                 reg, size, value);
1094
1095         return (result ? AE_ERROR : AE_OK);
1096 }
1097
1098 static void acpi_os_execute_deferred(struct work_struct *work)
1099 {
1100         struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
1101
1102         dpc->function(dpc->context);
1103         kfree(dpc);
1104 }
1105
1106 #ifdef CONFIG_ACPI_DEBUGGER
1107 static struct acpi_debugger acpi_debugger;
1108 static bool acpi_debugger_initialized;
1109
1110 int acpi_register_debugger(struct module *owner,
1111                            const struct acpi_debugger_ops *ops)
1112 {
1113         int ret = 0;
1114
1115         mutex_lock(&acpi_debugger.lock);
1116         if (acpi_debugger.ops) {
1117                 ret = -EBUSY;
1118                 goto err_lock;
1119         }
1120
1121         acpi_debugger.owner = owner;
1122         acpi_debugger.ops = ops;
1123
1124 err_lock:
1125         mutex_unlock(&acpi_debugger.lock);
1126         return ret;
1127 }
1128 EXPORT_SYMBOL(acpi_register_debugger);
1129
1130 void acpi_unregister_debugger(const struct acpi_debugger_ops *ops)
1131 {
1132         mutex_lock(&acpi_debugger.lock);
1133         if (ops == acpi_debugger.ops) {
1134                 acpi_debugger.ops = NULL;
1135                 acpi_debugger.owner = NULL;
1136         }
1137         mutex_unlock(&acpi_debugger.lock);
1138 }
1139 EXPORT_SYMBOL(acpi_unregister_debugger);
1140
1141 int acpi_debugger_create_thread(acpi_osd_exec_callback function, void *context)
1142 {
1143         int ret;
1144         int (*func)(acpi_osd_exec_callback, void *);
1145         struct module *owner;
1146
1147         if (!acpi_debugger_initialized)
1148                 return -ENODEV;
1149         mutex_lock(&acpi_debugger.lock);
1150         if (!acpi_debugger.ops) {
1151                 ret = -ENODEV;
1152                 goto err_lock;
1153         }
1154         if (!try_module_get(acpi_debugger.owner)) {
1155                 ret = -ENODEV;
1156                 goto err_lock;
1157         }
1158         func = acpi_debugger.ops->create_thread;
1159         owner = acpi_debugger.owner;
1160         mutex_unlock(&acpi_debugger.lock);
1161
1162         ret = func(function, context);
1163
1164         mutex_lock(&acpi_debugger.lock);
1165         module_put(owner);
1166 err_lock:
1167         mutex_unlock(&acpi_debugger.lock);
1168         return ret;
1169 }
1170
1171 ssize_t acpi_debugger_write_log(const char *msg)
1172 {
1173         ssize_t ret;
1174         ssize_t (*func)(const char *);
1175         struct module *owner;
1176
1177         if (!acpi_debugger_initialized)
1178                 return -ENODEV;
1179         mutex_lock(&acpi_debugger.lock);
1180         if (!acpi_debugger.ops) {
1181                 ret = -ENODEV;
1182                 goto err_lock;
1183         }
1184         if (!try_module_get(acpi_debugger.owner)) {
1185                 ret = -ENODEV;
1186                 goto err_lock;
1187         }
1188         func = acpi_debugger.ops->write_log;
1189         owner = acpi_debugger.owner;
1190         mutex_unlock(&acpi_debugger.lock);
1191
1192         ret = func(msg);
1193
1194         mutex_lock(&acpi_debugger.lock);
1195         module_put(owner);
1196 err_lock:
1197         mutex_unlock(&acpi_debugger.lock);
1198         return ret;
1199 }
1200
1201 ssize_t acpi_debugger_read_cmd(char *buffer, size_t buffer_length)
1202 {
1203         ssize_t ret;
1204         ssize_t (*func)(char *, size_t);
1205         struct module *owner;
1206
1207         if (!acpi_debugger_initialized)
1208                 return -ENODEV;
1209         mutex_lock(&acpi_debugger.lock);
1210         if (!acpi_debugger.ops) {
1211                 ret = -ENODEV;
1212                 goto err_lock;
1213         }
1214         if (!try_module_get(acpi_debugger.owner)) {
1215                 ret = -ENODEV;
1216                 goto err_lock;
1217         }
1218         func = acpi_debugger.ops->read_cmd;
1219         owner = acpi_debugger.owner;
1220         mutex_unlock(&acpi_debugger.lock);
1221
1222         ret = func(buffer, buffer_length);
1223
1224         mutex_lock(&acpi_debugger.lock);
1225         module_put(owner);
1226 err_lock:
1227         mutex_unlock(&acpi_debugger.lock);
1228         return ret;
1229 }
1230
1231 int acpi_debugger_wait_command_ready(void)
1232 {
1233         int ret;
1234         int (*func)(bool, char *, size_t);
1235         struct module *owner;
1236
1237         if (!acpi_debugger_initialized)
1238                 return -ENODEV;
1239         mutex_lock(&acpi_debugger.lock);
1240         if (!acpi_debugger.ops) {
1241                 ret = -ENODEV;
1242                 goto err_lock;
1243         }
1244         if (!try_module_get(acpi_debugger.owner)) {
1245                 ret = -ENODEV;
1246                 goto err_lock;
1247         }
1248         func = acpi_debugger.ops->wait_command_ready;
1249         owner = acpi_debugger.owner;
1250         mutex_unlock(&acpi_debugger.lock);
1251
1252         ret = func(acpi_gbl_method_executing,
1253                    acpi_gbl_db_line_buf, ACPI_DB_LINE_BUFFER_SIZE);
1254
1255         mutex_lock(&acpi_debugger.lock);
1256         module_put(owner);
1257 err_lock:
1258         mutex_unlock(&acpi_debugger.lock);
1259         return ret;
1260 }
1261
1262 int acpi_debugger_notify_command_complete(void)
1263 {
1264         int ret;
1265         int (*func)(void);
1266         struct module *owner;
1267
1268         if (!acpi_debugger_initialized)
1269                 return -ENODEV;
1270         mutex_lock(&acpi_debugger.lock);
1271         if (!acpi_debugger.ops) {
1272                 ret = -ENODEV;
1273                 goto err_lock;
1274         }
1275         if (!try_module_get(acpi_debugger.owner)) {
1276                 ret = -ENODEV;
1277                 goto err_lock;
1278         }
1279         func = acpi_debugger.ops->notify_command_complete;
1280         owner = acpi_debugger.owner;
1281         mutex_unlock(&acpi_debugger.lock);
1282
1283         ret = func();
1284
1285         mutex_lock(&acpi_debugger.lock);
1286         module_put(owner);
1287 err_lock:
1288         mutex_unlock(&acpi_debugger.lock);
1289         return ret;
1290 }
1291
1292 int __init acpi_debugger_init(void)
1293 {
1294         mutex_init(&acpi_debugger.lock);
1295         acpi_debugger_initialized = true;
1296         return 0;
1297 }
1298 #endif
1299
1300 /*******************************************************************************
1301  *
1302  * FUNCTION:    acpi_os_execute
1303  *
1304  * PARAMETERS:  Type               - Type of the callback
1305  *              Function           - Function to be executed
1306  *              Context            - Function parameters
1307  *
1308  * RETURN:      Status
1309  *
1310  * DESCRIPTION: Depending on type, either queues function for deferred execution or
1311  *              immediately executes function on a separate thread.
1312  *
1313  ******************************************************************************/
1314
1315 acpi_status acpi_os_execute(acpi_execute_type type,
1316                             acpi_osd_exec_callback function, void *context)
1317 {
1318         acpi_status status = AE_OK;
1319         struct acpi_os_dpc *dpc;
1320         struct workqueue_struct *queue;
1321         int ret;
1322         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
1323                           "Scheduling function [%p(%p)] for deferred execution.\n",
1324                           function, context));
1325
1326         if (type == OSL_DEBUGGER_MAIN_THREAD) {
1327                 ret = acpi_debugger_create_thread(function, context);
1328                 if (ret) {
1329                         pr_err("Call to kthread_create() failed.\n");
1330                         status = AE_ERROR;
1331                 }
1332                 goto out_thread;
1333         }
1334
1335         /*
1336          * Allocate/initialize DPC structure.  Note that this memory will be
1337          * freed by the callee.  The kernel handles the work_struct list  in a
1338          * way that allows us to also free its memory inside the callee.
1339          * Because we may want to schedule several tasks with different
1340          * parameters we can't use the approach some kernel code uses of
1341          * having a static work_struct.
1342          */
1343
1344         dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC);
1345         if (!dpc)
1346                 return AE_NO_MEMORY;
1347
1348         dpc->function = function;
1349         dpc->context = context;
1350
1351         /*
1352          * To prevent lockdep from complaining unnecessarily, make sure that
1353          * there is a different static lockdep key for each workqueue by using
1354          * INIT_WORK() for each of them separately.
1355          */
1356         if (type == OSL_NOTIFY_HANDLER) {
1357                 queue = kacpi_notify_wq;
1358                 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
1359         } else if (type == OSL_GPE_HANDLER) {
1360                 queue = kacpid_wq;
1361                 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
1362         } else {
1363                 pr_err("Unsupported os_execute type %d.\n", type);
1364                 status = AE_ERROR;
1365         }
1366
1367         if (ACPI_FAILURE(status))
1368                 goto err_workqueue;
1369
1370         /*
1371          * On some machines, a software-initiated SMI causes corruption unless
1372          * the SMI runs on CPU 0.  An SMI can be initiated by any AML, but
1373          * typically it's done in GPE-related methods that are run via
1374          * workqueues, so we can avoid the known corruption cases by always
1375          * queueing on CPU 0.
1376          */
1377         ret = queue_work_on(0, queue, &dpc->work);
1378         if (!ret) {
1379                 printk(KERN_ERR PREFIX
1380                           "Call to queue_work() failed.\n");
1381                 status = AE_ERROR;
1382         }
1383 err_workqueue:
1384         if (ACPI_FAILURE(status))
1385                 kfree(dpc);
1386 out_thread:
1387         return status;
1388 }
1389 EXPORT_SYMBOL(acpi_os_execute);
1390
1391 void acpi_os_wait_events_complete(void)
1392 {
1393         /*
1394          * Make sure the GPE handler or the fixed event handler is not used
1395          * on another CPU after removal.
1396          */
1397         if (acpi_sci_irq_valid())
1398                 synchronize_hardirq(acpi_sci_irq);
1399         flush_workqueue(kacpid_wq);
1400         flush_workqueue(kacpi_notify_wq);
1401 }
1402
1403 struct acpi_hp_work {
1404         struct work_struct work;
1405         struct acpi_device *adev;
1406         u32 src;
1407 };
1408
1409 static void acpi_hotplug_work_fn(struct work_struct *work)
1410 {
1411         struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work);
1412
1413         acpi_os_wait_events_complete();
1414         acpi_device_hotplug(hpw->adev, hpw->src);
1415         kfree(hpw);
1416 }
1417
1418 acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src)
1419 {
1420         struct acpi_hp_work *hpw;
1421
1422         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
1423                   "Scheduling hotplug event (%p, %u) for deferred execution.\n",
1424                   adev, src));
1425
1426         hpw = kmalloc(sizeof(*hpw), GFP_KERNEL);
1427         if (!hpw)
1428                 return AE_NO_MEMORY;
1429
1430         INIT_WORK(&hpw->work, acpi_hotplug_work_fn);
1431         hpw->adev = adev;
1432         hpw->src = src;
1433         /*
1434          * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because
1435          * the hotplug code may call driver .remove() functions, which may
1436          * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush
1437          * these workqueues.
1438          */
1439         if (!queue_work(kacpi_hotplug_wq, &hpw->work)) {
1440                 kfree(hpw);
1441                 return AE_ERROR;
1442         }
1443         return AE_OK;
1444 }
1445
1446 bool acpi_queue_hotplug_work(struct work_struct *work)
1447 {
1448         return queue_work(kacpi_hotplug_wq, work);
1449 }
1450
1451 acpi_status
1452 acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
1453 {
1454         struct semaphore *sem = NULL;
1455
1456         sem = acpi_os_allocate_zeroed(sizeof(struct semaphore));
1457         if (!sem)
1458                 return AE_NO_MEMORY;
1459
1460         sema_init(sem, initial_units);
1461
1462         *handle = (acpi_handle *) sem;
1463
1464         ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n",
1465                           *handle, initial_units));
1466
1467         return AE_OK;
1468 }
1469
1470 /*
1471  * TODO: A better way to delete semaphores?  Linux doesn't have a
1472  * 'delete_semaphore()' function -- may result in an invalid
1473  * pointer dereference for non-synchronized consumers.  Should
1474  * we at least check for blocked threads and signal/cancel them?
1475  */
1476
1477 acpi_status acpi_os_delete_semaphore(acpi_handle handle)
1478 {
1479         struct semaphore *sem = (struct semaphore *)handle;
1480
1481         if (!sem)
1482                 return AE_BAD_PARAMETER;
1483
1484         ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle));
1485
1486         BUG_ON(!list_empty(&sem->wait_list));
1487         kfree(sem);
1488         sem = NULL;
1489
1490         return AE_OK;
1491 }
1492
1493 /*
1494  * TODO: Support for units > 1?
1495  */
1496 acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
1497 {
1498         acpi_status status = AE_OK;
1499         struct semaphore *sem = (struct semaphore *)handle;
1500         long jiffies;
1501         int ret = 0;
1502
1503         if (!acpi_os_initialized)
1504                 return AE_OK;
1505
1506         if (!sem || (units < 1))
1507                 return AE_BAD_PARAMETER;
1508
1509         if (units > 1)
1510                 return AE_SUPPORT;
1511
1512         ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n",
1513                           handle, units, timeout));
1514
1515         if (timeout == ACPI_WAIT_FOREVER)
1516                 jiffies = MAX_SCHEDULE_TIMEOUT;
1517         else
1518                 jiffies = msecs_to_jiffies(timeout);
1519
1520         ret = down_timeout(sem, jiffies);
1521         if (ret)
1522                 status = AE_TIME;
1523
1524         if (ACPI_FAILURE(status)) {
1525                 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
1526                                   "Failed to acquire semaphore[%p|%d|%d], %s",
1527                                   handle, units, timeout,
1528                                   acpi_format_exception(status)));
1529         } else {
1530                 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
1531                                   "Acquired semaphore[%p|%d|%d]", handle,
1532                                   units, timeout));
1533         }
1534
1535         return status;
1536 }
1537
1538 /*
1539  * TODO: Support for units > 1?
1540  */
1541 acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
1542 {
1543         struct semaphore *sem = (struct semaphore *)handle;
1544
1545         if (!acpi_os_initialized)
1546                 return AE_OK;
1547
1548         if (!sem || (units < 1))
1549                 return AE_BAD_PARAMETER;
1550
1551         if (units > 1)
1552                 return AE_SUPPORT;
1553
1554         ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle,
1555                           units));
1556
1557         up(sem);
1558
1559         return AE_OK;
1560 }
1561
1562 acpi_status acpi_os_get_line(char *buffer, u32 buffer_length, u32 *bytes_read)
1563 {
1564 #ifdef ENABLE_DEBUGGER
1565         if (acpi_in_debugger) {
1566                 u32 chars;
1567
1568                 kdb_read(buffer, buffer_length);
1569
1570                 /* remove the CR kdb includes */
1571                 chars = strlen(buffer) - 1;
1572                 buffer[chars] = '\0';
1573         }
1574 #else
1575         int ret;
1576
1577         ret = acpi_debugger_read_cmd(buffer, buffer_length);
1578         if (ret < 0)
1579                 return AE_ERROR;
1580         if (bytes_read)
1581                 *bytes_read = ret;
1582 #endif
1583
1584         return AE_OK;
1585 }
1586 EXPORT_SYMBOL(acpi_os_get_line);
1587
1588 acpi_status acpi_os_wait_command_ready(void)
1589 {
1590         int ret;
1591
1592         ret = acpi_debugger_wait_command_ready();
1593         if (ret < 0)
1594                 return AE_ERROR;
1595         return AE_OK;
1596 }
1597
1598 acpi_status acpi_os_notify_command_complete(void)
1599 {
1600         int ret;
1601
1602         ret = acpi_debugger_notify_command_complete();
1603         if (ret < 0)
1604                 return AE_ERROR;
1605         return AE_OK;
1606 }
1607
1608 acpi_status acpi_os_signal(u32 function, void *info)
1609 {
1610         switch (function) {
1611         case ACPI_SIGNAL_FATAL:
1612                 printk(KERN_ERR PREFIX "Fatal opcode executed\n");
1613                 break;
1614         case ACPI_SIGNAL_BREAKPOINT:
1615                 /*
1616                  * AML Breakpoint
1617                  * ACPI spec. says to treat it as a NOP unless
1618                  * you are debugging.  So if/when we integrate
1619                  * AML debugger into the kernel debugger its
1620                  * hook will go here.  But until then it is
1621                  * not useful to print anything on breakpoints.
1622                  */
1623                 break;
1624         default:
1625                 break;
1626         }
1627
1628         return AE_OK;
1629 }
1630
1631 static int __init acpi_os_name_setup(char *str)
1632 {
1633         char *p = acpi_os_name;
1634         int count = ACPI_MAX_OVERRIDE_LEN - 1;
1635
1636         if (!str || !*str)
1637                 return 0;
1638
1639         for (; count-- && *str; str++) {
1640                 if (isalnum(*str) || *str == ' ' || *str == ':')
1641                         *p++ = *str;
1642                 else if (*str == '\'' || *str == '"')
1643                         continue;
1644                 else
1645                         break;
1646         }
1647         *p = 0;
1648
1649         return 1;
1650
1651 }
1652
1653 __setup("acpi_os_name=", acpi_os_name_setup);
1654
1655 #define OSI_STRING_LENGTH_MAX 64        /* arbitrary */
1656 #define OSI_STRING_ENTRIES_MAX 16       /* arbitrary */
1657
1658 struct osi_setup_entry {
1659         char string[OSI_STRING_LENGTH_MAX];
1660         bool enable;
1661 };
1662
1663 static struct osi_setup_entry
1664                 osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = {
1665         {"Module Device", true},
1666         {"Processor Device", true},
1667         {"3.0 _SCP Extensions", true},
1668         {"Processor Aggregator Device", true},
1669 };
1670
1671 void __init acpi_osi_setup(char *str)
1672 {
1673         struct osi_setup_entry *osi;
1674         bool enable = true;
1675         int i;
1676
1677         if (!acpi_gbl_create_osi_method)
1678                 return;
1679
1680         if (str == NULL || *str == '\0') {
1681                 printk(KERN_INFO PREFIX "_OSI method disabled\n");
1682                 acpi_gbl_create_osi_method = FALSE;
1683                 return;
1684         }
1685
1686         if (*str == '!') {
1687                 str++;
1688                 if (*str == '\0') {
1689                         osi_linux.default_disabling = 1;
1690                         return;
1691                 } else if (*str == '*') {
1692                         acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS);
1693                         for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1694                                 osi = &osi_setup_entries[i];
1695                                 osi->enable = false;
1696                         }
1697                         return;
1698                 }
1699                 enable = false;
1700         }
1701
1702         for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1703                 osi = &osi_setup_entries[i];
1704                 if (!strcmp(osi->string, str)) {
1705                         osi->enable = enable;
1706                         break;
1707                 } else if (osi->string[0] == '\0') {
1708                         osi->enable = enable;
1709                         strncpy(osi->string, str, OSI_STRING_LENGTH_MAX);
1710                         break;
1711                 }
1712         }
1713 }
1714
1715 static void __init set_osi_linux(unsigned int enable)
1716 {
1717         if (osi_linux.enable != enable)
1718                 osi_linux.enable = enable;
1719
1720         if (osi_linux.enable)
1721                 acpi_osi_setup("Linux");
1722         else
1723                 acpi_osi_setup("!Linux");
1724
1725         return;
1726 }
1727
1728 static void __init acpi_cmdline_osi_linux(unsigned int enable)
1729 {
1730         osi_linux.cmdline = 1;  /* cmdline set the default and override DMI */
1731         osi_linux.dmi = 0;
1732         set_osi_linux(enable);
1733
1734         return;
1735 }
1736
1737 void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d)
1738 {
1739         printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident);
1740
1741         if (enable == -1)
1742                 return;
1743
1744         osi_linux.dmi = 1;      /* DMI knows that this box asks OSI(Linux) */
1745         set_osi_linux(enable);
1746
1747         return;
1748 }
1749
1750 /*
1751  * Modify the list of "OS Interfaces" reported to BIOS via _OSI
1752  *
1753  * empty string disables _OSI
1754  * string starting with '!' disables that string
1755  * otherwise string is added to list, augmenting built-in strings
1756  */
1757 static void __init acpi_osi_setup_late(void)
1758 {
1759         struct osi_setup_entry *osi;
1760         char *str;
1761         int i;
1762         acpi_status status;
1763
1764         if (osi_linux.default_disabling) {
1765                 status = acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS);
1766
1767                 if (ACPI_SUCCESS(status))
1768                         printk(KERN_INFO PREFIX "Disabled all _OSI OS vendors\n");
1769         }
1770
1771         for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1772                 osi = &osi_setup_entries[i];
1773                 str = osi->string;
1774
1775                 if (*str == '\0')
1776                         break;
1777                 if (osi->enable) {
1778                         status = acpi_install_interface(str);
1779
1780                         if (ACPI_SUCCESS(status))
1781                                 printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
1782                 } else {
1783                         status = acpi_remove_interface(str);
1784
1785                         if (ACPI_SUCCESS(status))
1786                                 printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
1787                 }
1788         }
1789 }
1790
1791 static int __init osi_setup(char *str)
1792 {
1793         if (str && !strcmp("Linux", str))
1794                 acpi_cmdline_osi_linux(1);
1795         else if (str && !strcmp("!Linux", str))
1796                 acpi_cmdline_osi_linux(0);
1797         else
1798                 acpi_osi_setup(str);
1799
1800         return 1;
1801 }
1802
1803 __setup("acpi_osi=", osi_setup);
1804
1805 /*
1806  * Disable the auto-serialization of named objects creation methods.
1807  *
1808  * This feature is enabled by default.  It marks the AML control methods
1809  * that contain the opcodes to create named objects as "Serialized".
1810  */
1811 static int __init acpi_no_auto_serialize_setup(char *str)
1812 {
1813         acpi_gbl_auto_serialize_methods = FALSE;
1814         pr_info("ACPI: auto-serialization disabled\n");
1815
1816         return 1;
1817 }
1818
1819 __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup);
1820
1821 /* Check of resource interference between native drivers and ACPI
1822  * OperationRegions (SystemIO and System Memory only).
1823  * IO ports and memory declared in ACPI might be used by the ACPI subsystem
1824  * in arbitrary AML code and can interfere with legacy drivers.
1825  * acpi_enforce_resources= can be set to:
1826  *
1827  *   - strict (default) (2)
1828  *     -> further driver trying to access the resources will not load
1829  *   - lax              (1)
1830  *     -> further driver trying to access the resources will load, but you
1831  *     get a system message that something might go wrong...
1832  *
1833  *   - no               (0)
1834  *     -> ACPI Operation Region resources will not be registered
1835  *
1836  */
1837 #define ENFORCE_RESOURCES_STRICT 2
1838 #define ENFORCE_RESOURCES_LAX    1
1839 #define ENFORCE_RESOURCES_NO     0
1840
1841 static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1842
1843 static int __init acpi_enforce_resources_setup(char *str)
1844 {
1845         if (str == NULL || *str == '\0')
1846                 return 0;
1847
1848         if (!strcmp("strict", str))
1849                 acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1850         else if (!strcmp("lax", str))
1851                 acpi_enforce_resources = ENFORCE_RESOURCES_LAX;
1852         else if (!strcmp("no", str))
1853                 acpi_enforce_resources = ENFORCE_RESOURCES_NO;
1854
1855         return 1;
1856 }
1857
1858 __setup("acpi_enforce_resources=", acpi_enforce_resources_setup);
1859
1860 /* Check for resource conflicts between ACPI OperationRegions and native
1861  * drivers */
1862 int acpi_check_resource_conflict(const struct resource *res)
1863 {
1864         acpi_adr_space_type space_id;
1865         acpi_size length;
1866         u8 warn = 0;
1867         int clash = 0;
1868
1869         if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
1870                 return 0;
1871         if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM))
1872                 return 0;
1873
1874         if (res->flags & IORESOURCE_IO)
1875                 space_id = ACPI_ADR_SPACE_SYSTEM_IO;
1876         else
1877                 space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY;
1878
1879         length = resource_size(res);
1880         if (acpi_enforce_resources != ENFORCE_RESOURCES_NO)
1881                 warn = 1;
1882         clash = acpi_check_address_range(space_id, res->start, length, warn);
1883
1884         if (clash) {
1885                 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) {
1886                         if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX)
1887                                 printk(KERN_NOTICE "ACPI: This conflict may"
1888                                        " cause random problems and system"
1889                                        " instability\n");
1890                         printk(KERN_INFO "ACPI: If an ACPI driver is available"
1891                                " for this device, you should use it instead of"
1892                                " the native driver\n");
1893                 }
1894                 if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT)
1895                         return -EBUSY;
1896         }
1897         return 0;
1898 }
1899 EXPORT_SYMBOL(acpi_check_resource_conflict);
1900
1901 int acpi_check_region(resource_size_t start, resource_size_t n,
1902                       const char *name)
1903 {
1904         struct resource res = {
1905                 .start = start,
1906                 .end   = start + n - 1,
1907                 .name  = name,
1908                 .flags = IORESOURCE_IO,
1909         };
1910
1911         return acpi_check_resource_conflict(&res);
1912 }
1913 EXPORT_SYMBOL(acpi_check_region);
1914
1915 /*
1916  * Let drivers know whether the resource checks are effective
1917  */
1918 int acpi_resources_are_enforced(void)
1919 {
1920         return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT;
1921 }
1922 EXPORT_SYMBOL(acpi_resources_are_enforced);
1923
1924 bool acpi_osi_is_win8(void)
1925 {
1926         return acpi_gbl_osi_data >= ACPI_OSI_WIN_8;
1927 }
1928 EXPORT_SYMBOL(acpi_osi_is_win8);
1929
1930 /*
1931  * Deallocate the memory for a spinlock.
1932  */
1933 void acpi_os_delete_lock(acpi_spinlock handle)
1934 {
1935         ACPI_FREE(handle);
1936 }
1937
1938 /*
1939  * Acquire a spinlock.
1940  *
1941  * handle is a pointer to the spinlock_t.
1942  */
1943
1944 acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp)
1945 {
1946         acpi_cpu_flags flags;
1947         spin_lock_irqsave(lockp, flags);
1948         return flags;
1949 }
1950
1951 /*
1952  * Release a spinlock. See above.
1953  */
1954
1955 void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags)
1956 {
1957         spin_unlock_irqrestore(lockp, flags);
1958 }
1959
1960 #ifndef ACPI_USE_LOCAL_CACHE
1961
1962 /*******************************************************************************
1963  *
1964  * FUNCTION:    acpi_os_create_cache
1965  *
1966  * PARAMETERS:  name      - Ascii name for the cache
1967  *              size      - Size of each cached object
1968  *              depth     - Maximum depth of the cache (in objects) <ignored>
1969  *              cache     - Where the new cache object is returned
1970  *
1971  * RETURN:      status
1972  *
1973  * DESCRIPTION: Create a cache object
1974  *
1975  ******************************************************************************/
1976
1977 acpi_status
1978 acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache)
1979 {
1980         *cache = kmem_cache_create(name, size, 0, 0, NULL);
1981         if (*cache == NULL)
1982                 return AE_ERROR;
1983         else
1984                 return AE_OK;
1985 }
1986
1987 /*******************************************************************************
1988  *
1989  * FUNCTION:    acpi_os_purge_cache
1990  *
1991  * PARAMETERS:  Cache           - Handle to cache object
1992  *
1993  * RETURN:      Status
1994  *
1995  * DESCRIPTION: Free all objects within the requested cache.
1996  *
1997  ******************************************************************************/
1998
1999 acpi_status acpi_os_purge_cache(acpi_cache_t * cache)
2000 {
2001         kmem_cache_shrink(cache);
2002         return (AE_OK);
2003 }
2004
2005 /*******************************************************************************
2006  *
2007  * FUNCTION:    acpi_os_delete_cache
2008  *
2009  * PARAMETERS:  Cache           - Handle to cache object
2010  *
2011  * RETURN:      Status
2012  *
2013  * DESCRIPTION: Free all objects within the requested cache and delete the
2014  *              cache object.
2015  *
2016  ******************************************************************************/
2017
2018 acpi_status acpi_os_delete_cache(acpi_cache_t * cache)
2019 {
2020         kmem_cache_destroy(cache);
2021         return (AE_OK);
2022 }
2023
2024 /*******************************************************************************
2025  *
2026  * FUNCTION:    acpi_os_release_object
2027  *
2028  * PARAMETERS:  Cache       - Handle to cache object
2029  *              Object      - The object to be released
2030  *
2031  * RETURN:      None
2032  *
2033  * DESCRIPTION: Release an object to the specified cache.  If cache is full,
2034  *              the object is deleted.
2035  *
2036  ******************************************************************************/
2037
2038 acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)
2039 {
2040         kmem_cache_free(cache, object);
2041         return (AE_OK);
2042 }
2043 #endif
2044
2045 static int __init acpi_no_static_ssdt_setup(char *s)
2046 {
2047         acpi_gbl_disable_ssdt_table_install = TRUE;
2048         pr_info("ACPI: static SSDT installation disabled\n");
2049
2050         return 0;
2051 }
2052
2053 early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup);
2054
2055 static int __init acpi_disable_return_repair(char *s)
2056 {
2057         printk(KERN_NOTICE PREFIX
2058                "ACPI: Predefined validation mechanism disabled\n");
2059         acpi_gbl_disable_auto_repair = TRUE;
2060
2061         return 1;
2062 }
2063
2064 __setup("acpica_no_return_repair", acpi_disable_return_repair);
2065
2066 acpi_status __init acpi_os_initialize(void)
2067 {
2068         acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
2069         acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
2070         acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block);
2071         acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block);
2072         if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) {
2073                 /*
2074                  * Use acpi_os_map_generic_address to pre-map the reset
2075                  * register if it's in system memory.
2076                  */
2077                 int rv;
2078
2079                 rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register);
2080                 pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv);
2081         }
2082         acpi_os_initialized = true;
2083
2084         return AE_OK;
2085 }
2086
2087 acpi_status __init acpi_os_initialize1(void)
2088 {
2089         kacpid_wq = alloc_workqueue("kacpid", 0, 1);
2090         kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1);
2091         kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0);
2092         BUG_ON(!kacpid_wq);
2093         BUG_ON(!kacpi_notify_wq);
2094         BUG_ON(!kacpi_hotplug_wq);
2095         acpi_install_interface_handler(acpi_osi_handler);
2096         acpi_osi_setup_late();
2097         return AE_OK;
2098 }
2099
2100 acpi_status acpi_os_terminate(void)
2101 {
2102         if (acpi_irq_handler) {
2103                 acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt,
2104                                                  acpi_irq_handler);
2105         }
2106
2107         acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block);
2108         acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block);
2109         acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
2110         acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
2111         if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER)
2112                 acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register);
2113
2114         destroy_workqueue(kacpid_wq);
2115         destroy_workqueue(kacpi_notify_wq);
2116         destroy_workqueue(kacpi_hotplug_wq);
2117
2118         return AE_OK;
2119 }
2120
2121 acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control,
2122                                   u32 pm1b_control)
2123 {
2124         int rc = 0;
2125         if (__acpi_os_prepare_sleep)
2126                 rc = __acpi_os_prepare_sleep(sleep_state,
2127                                              pm1a_control, pm1b_control);
2128         if (rc < 0)
2129                 return AE_ERROR;
2130         else if (rc > 0)
2131                 return AE_CTRL_SKIP;
2132
2133         return AE_OK;
2134 }
2135
2136 void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state,
2137                                u32 pm1a_ctrl, u32 pm1b_ctrl))
2138 {
2139         __acpi_os_prepare_sleep = func;
2140 }
2141
2142 acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a,
2143                                   u32 val_b)
2144 {
2145         int rc = 0;
2146         if (__acpi_os_prepare_extended_sleep)
2147                 rc = __acpi_os_prepare_extended_sleep(sleep_state,
2148                                              val_a, val_b);
2149         if (rc < 0)
2150                 return AE_ERROR;
2151         else if (rc > 0)
2152                 return AE_CTRL_SKIP;
2153
2154         return AE_OK;
2155 }
2156
2157 void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state,
2158                                u32 val_a, u32 val_b))
2159 {
2160         __acpi_os_prepare_extended_sleep = func;
2161 }