dm thin metadata: fix __udivdi3 undefined on 32-bit
[linux/fpc-iii.git] / drivers / acpi / osl.c
bloba000ecb995e666ff6ee9b779ee198077ee31a823
1 /*
2 * acpi_osl.c - OS-dependent functions ($Revision: 83 $)
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>
10 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
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.
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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>
44 #include <asm/io.h>
45 #include <asm/uaccess.h>
46 #include <linux/io-64-nonatomic-lo-hi.h>
48 #include "internal.h"
50 #define _COMPONENT ACPI_OS_SERVICES
51 ACPI_MODULE_NAME("osl");
53 struct acpi_os_dpc {
54 acpi_osd_exec_callback function;
55 void *context;
56 struct work_struct work;
59 #ifdef CONFIG_ACPI_CUSTOM_DSDT
60 #include CONFIG_ACPI_CUSTOM_DSDT_FILE
61 #endif
63 #ifdef ENABLE_DEBUGGER
64 #include <linux/kdb.h>
66 /* stuff for debugger support */
67 int acpi_in_debugger;
68 EXPORT_SYMBOL(acpi_in_debugger);
69 #endif /*ENABLE_DEBUGGER */
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);
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;
85 * This list of permanent mappings is for memory that may be accessed from
86 * interrupt context, where we can't do the ioremap().
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;
96 static LIST_HEAD(acpi_ioremaps);
97 static DEFINE_MUTEX(acpi_ioremap_lock);
99 static void __init acpi_osi_setup_late(void);
102 * The story of _OSI(Linux)
104 * From pre-history through Linux-2.6.22,
105 * Linux responded TRUE upon a BIOS OSI(Linux) query.
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.
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.
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.
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"
134 static struct osi_linux {
135 unsigned int enable:1;
136 unsigned int dmi:1;
137 unsigned int cmdline:1;
138 u8 default_disabling;
139 } osi_linux = {0, 0, 0, 0};
141 static u32 acpi_osi_handler(acpi_string interface, u32 supported)
143 if (!strcmp("Linux", interface)) {
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" : "");
152 if (!strcmp("Darwin", interface)) {
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.
158 acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS);
159 supported = ACPI_UINT32_MAX;
162 return supported;
165 static void __init acpi_request_region (struct acpi_generic_address *gas,
166 unsigned int length, char *desc)
168 u64 addr;
170 /* Handle possible alignment issues */
171 memcpy(&addr, &gas->address, sizeof(addr));
172 if (!addr || !length)
173 return;
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);
182 static int __init acpi_reserve_resources(void)
184 acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length,
185 "ACPI PM1a_EVT_BLK");
187 acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length,
188 "ACPI PM1b_EVT_BLK");
190 acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length,
191 "ACPI PM1a_CNT_BLK");
193 acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length,
194 "ACPI PM1b_CNT_BLK");
196 if (acpi_gbl_FADT.pm_timer_length == 4)
197 acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR");
199 acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length,
200 "ACPI PM2_CNT_BLK");
202 /* Length of GPE blocks must be a non-negative multiple of 2 */
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");
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");
212 return 0;
214 fs_initcall_sync(acpi_reserve_resources);
216 void acpi_os_printf(const char *fmt, ...)
218 va_list args;
219 va_start(args, fmt);
220 acpi_os_vprintf(fmt, args);
221 va_end(args);
224 void acpi_os_vprintf(const char *fmt, va_list args)
226 static char buffer[512];
228 vsprintf(buffer, fmt, args);
230 #ifdef ENABLE_DEBUGGER
231 if (acpi_in_debugger) {
232 kdb_printf("%s", buffer);
233 } else {
234 printk(KERN_CONT "%s", buffer);
236 #else
237 printk(KERN_CONT "%s", buffer);
238 #endif
241 #ifdef CONFIG_KEXEC
242 static unsigned long acpi_rsdp;
243 static int __init setup_acpi_rsdp(char *arg)
245 if (kstrtoul(arg, 16, &acpi_rsdp))
246 return -EINVAL;
247 return 0;
249 early_param("acpi_rsdp", setup_acpi_rsdp);
250 #endif
252 acpi_physical_address __init acpi_os_get_root_pointer(void)
254 #ifdef CONFIG_KEXEC
255 if (acpi_rsdp)
256 return acpi_rsdp;
257 #endif
259 if (efi_enabled(EFI_CONFIG_TABLES)) {
260 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
261 return efi.acpi20;
262 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
263 return efi.acpi;
264 else {
265 printk(KERN_ERR PREFIX
266 "System description tables not found\n");
267 return 0;
269 } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) {
270 acpi_physical_address pa = 0;
272 acpi_find_root_pointer(&pa);
273 return pa;
276 return 0;
279 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
280 static struct acpi_ioremap *
281 acpi_map_lookup(acpi_physical_address phys, acpi_size size)
283 struct acpi_ioremap *map;
285 list_for_each_entry_rcu(map, &acpi_ioremaps, list)
286 if (map->phys <= phys &&
287 phys + size <= map->phys + map->size)
288 return map;
290 return NULL;
293 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
294 static void __iomem *
295 acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size)
297 struct acpi_ioremap *map;
299 map = acpi_map_lookup(phys, size);
300 if (map)
301 return map->virt + (phys - map->phys);
303 return NULL;
306 void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size)
308 struct acpi_ioremap *map;
309 void __iomem *virt = NULL;
311 mutex_lock(&acpi_ioremap_lock);
312 map = acpi_map_lookup(phys, size);
313 if (map) {
314 virt = map->virt + (phys - map->phys);
315 map->refcount++;
317 mutex_unlock(&acpi_ioremap_lock);
318 return virt;
320 EXPORT_SYMBOL_GPL(acpi_os_get_iomem);
322 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
323 static struct acpi_ioremap *
324 acpi_map_lookup_virt(void __iomem *virt, acpi_size size)
326 struct acpi_ioremap *map;
328 list_for_each_entry_rcu(map, &acpi_ioremaps, list)
329 if (map->virt <= virt &&
330 virt + size <= map->virt + map->size)
331 return map;
333 return NULL;
336 #if defined(CONFIG_IA64) || defined(CONFIG_ARM64)
337 /* ioremap will take care of cache attributes */
338 #define should_use_kmap(pfn) 0
339 #else
340 #define should_use_kmap(pfn) page_is_ram(pfn)
341 #endif
343 static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz)
345 unsigned long pfn;
347 pfn = pg_off >> PAGE_SHIFT;
348 if (should_use_kmap(pfn)) {
349 if (pg_sz > PAGE_SIZE)
350 return NULL;
351 return (void __iomem __force *)kmap(pfn_to_page(pfn));
352 } else
353 return acpi_os_ioremap(pg_off, pg_sz);
356 static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr)
358 unsigned long pfn;
360 pfn = pg_off >> PAGE_SHIFT;
361 if (should_use_kmap(pfn))
362 kunmap(pfn_to_page(pfn));
363 else
364 iounmap(vaddr);
367 void __iomem *__init_refok
368 acpi_os_map_iomem(acpi_physical_address phys, acpi_size size)
370 struct acpi_ioremap *map;
371 void __iomem *virt;
372 acpi_physical_address pg_off;
373 acpi_size pg_sz;
375 if (phys > ULONG_MAX) {
376 printk(KERN_ERR PREFIX "Cannot map memory that high\n");
377 return NULL;
380 if (!acpi_gbl_permanent_mmap)
381 return __acpi_map_table((unsigned long)phys, size);
383 mutex_lock(&acpi_ioremap_lock);
384 /* Check if there's a suitable mapping already. */
385 map = acpi_map_lookup(phys, size);
386 if (map) {
387 map->refcount++;
388 goto out;
391 map = kzalloc(sizeof(*map), GFP_KERNEL);
392 if (!map) {
393 mutex_unlock(&acpi_ioremap_lock);
394 return NULL;
397 pg_off = round_down(phys, PAGE_SIZE);
398 pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off;
399 virt = acpi_map(pg_off, pg_sz);
400 if (!virt) {
401 mutex_unlock(&acpi_ioremap_lock);
402 kfree(map);
403 return NULL;
406 INIT_LIST_HEAD(&map->list);
407 map->virt = virt;
408 map->phys = pg_off;
409 map->size = pg_sz;
410 map->refcount = 1;
412 list_add_tail_rcu(&map->list, &acpi_ioremaps);
414 out:
415 mutex_unlock(&acpi_ioremap_lock);
416 return map->virt + (phys - map->phys);
418 EXPORT_SYMBOL_GPL(acpi_os_map_iomem);
420 void *__init_refok
421 acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
423 return (void *)acpi_os_map_iomem(phys, size);
425 EXPORT_SYMBOL_GPL(acpi_os_map_memory);
427 static void acpi_os_drop_map_ref(struct acpi_ioremap *map)
429 if (!--map->refcount)
430 list_del_rcu(&map->list);
433 static void acpi_os_map_cleanup(struct acpi_ioremap *map)
435 if (!map->refcount) {
436 synchronize_rcu_expedited();
437 acpi_unmap(map->phys, map->virt);
438 kfree(map);
442 void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size)
444 struct acpi_ioremap *map;
446 if (!acpi_gbl_permanent_mmap) {
447 __acpi_unmap_table(virt, size);
448 return;
451 mutex_lock(&acpi_ioremap_lock);
452 map = acpi_map_lookup_virt(virt, size);
453 if (!map) {
454 mutex_unlock(&acpi_ioremap_lock);
455 WARN(true, PREFIX "%s: bad address %p\n", __func__, virt);
456 return;
458 acpi_os_drop_map_ref(map);
459 mutex_unlock(&acpi_ioremap_lock);
461 acpi_os_map_cleanup(map);
463 EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem);
465 void __ref acpi_os_unmap_memory(void *virt, acpi_size size)
467 return acpi_os_unmap_iomem((void __iomem *)virt, size);
469 EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
471 void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
473 if (!acpi_gbl_permanent_mmap)
474 __acpi_unmap_table(virt, size);
477 int acpi_os_map_generic_address(struct acpi_generic_address *gas)
479 u64 addr;
480 void __iomem *virt;
482 if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
483 return 0;
485 /* Handle possible alignment issues */
486 memcpy(&addr, &gas->address, sizeof(addr));
487 if (!addr || !gas->bit_width)
488 return -EINVAL;
490 virt = acpi_os_map_iomem(addr, gas->bit_width / 8);
491 if (!virt)
492 return -EIO;
494 return 0;
496 EXPORT_SYMBOL(acpi_os_map_generic_address);
498 void acpi_os_unmap_generic_address(struct acpi_generic_address *gas)
500 u64 addr;
501 struct acpi_ioremap *map;
503 if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
504 return;
506 /* Handle possible alignment issues */
507 memcpy(&addr, &gas->address, sizeof(addr));
508 if (!addr || !gas->bit_width)
509 return;
511 mutex_lock(&acpi_ioremap_lock);
512 map = acpi_map_lookup(addr, gas->bit_width / 8);
513 if (!map) {
514 mutex_unlock(&acpi_ioremap_lock);
515 return;
517 acpi_os_drop_map_ref(map);
518 mutex_unlock(&acpi_ioremap_lock);
520 acpi_os_map_cleanup(map);
522 EXPORT_SYMBOL(acpi_os_unmap_generic_address);
524 #ifdef ACPI_FUTURE_USAGE
525 acpi_status
526 acpi_os_get_physical_address(void *virt, acpi_physical_address * phys)
528 if (!phys || !virt)
529 return AE_BAD_PARAMETER;
531 *phys = virt_to_phys(virt);
533 return AE_OK;
535 #endif
537 #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE
538 static bool acpi_rev_override;
540 int __init acpi_rev_override_setup(char *str)
542 acpi_rev_override = true;
543 return 1;
545 __setup("acpi_rev_override", acpi_rev_override_setup);
546 #else
547 #define acpi_rev_override false
548 #endif
550 #define ACPI_MAX_OVERRIDE_LEN 100
552 static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN];
554 acpi_status
555 acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
556 char **new_val)
558 if (!init_val || !new_val)
559 return AE_BAD_PARAMETER;
561 *new_val = NULL;
562 if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) {
563 printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n",
564 acpi_os_name);
565 *new_val = acpi_os_name;
568 if (!memcmp(init_val->name, "_REV", 4) && acpi_rev_override) {
569 printk(KERN_INFO PREFIX "Overriding _REV return value to 5\n");
570 *new_val = (char *)5;
573 return AE_OK;
576 #ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
577 #include <linux/earlycpio.h>
578 #include <linux/memblock.h>
580 static u64 acpi_tables_addr;
581 static int all_tables_size;
583 /* Copied from acpica/tbutils.c:acpi_tb_checksum() */
584 static u8 __init acpi_table_checksum(u8 *buffer, u32 length)
586 u8 sum = 0;
587 u8 *end = buffer + length;
589 while (buffer < end)
590 sum = (u8) (sum + *(buffer++));
591 return sum;
594 /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */
595 static const char * const table_sigs[] = {
596 ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ,
597 ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT,
598 ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF,
599 ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET,
600 ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI,
601 ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA,
602 ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT,
603 ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT,
604 ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL };
606 #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
608 #define ACPI_OVERRIDE_TABLES 64
609 static struct cpio_data __initdata acpi_initrd_files[ACPI_OVERRIDE_TABLES];
611 #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT)
613 void __init acpi_initrd_override(void *data, size_t size)
615 int sig, no, table_nr = 0, total_offset = 0;
616 long offset = 0;
617 struct acpi_table_header *table;
618 char cpio_path[32] = "kernel/firmware/acpi/";
619 struct cpio_data file;
621 if (data == NULL || size == 0)
622 return;
624 for (no = 0; no < ACPI_OVERRIDE_TABLES; no++) {
625 file = find_cpio_data(cpio_path, data, size, &offset);
626 if (!file.data)
627 break;
629 data += offset;
630 size -= offset;
632 if (file.size < sizeof(struct acpi_table_header)) {
633 pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n",
634 cpio_path, file.name);
635 continue;
638 table = file.data;
640 for (sig = 0; table_sigs[sig]; sig++)
641 if (!memcmp(table->signature, table_sigs[sig], 4))
642 break;
644 if (!table_sigs[sig]) {
645 pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n",
646 cpio_path, file.name);
647 continue;
649 if (file.size != table->length) {
650 pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n",
651 cpio_path, file.name);
652 continue;
654 if (acpi_table_checksum(file.data, table->length)) {
655 pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n",
656 cpio_path, file.name);
657 continue;
660 pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n",
661 table->signature, cpio_path, file.name, table->length);
663 all_tables_size += table->length;
664 acpi_initrd_files[table_nr].data = file.data;
665 acpi_initrd_files[table_nr].size = file.size;
666 table_nr++;
668 if (table_nr == 0)
669 return;
671 acpi_tables_addr =
672 memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT,
673 all_tables_size, PAGE_SIZE);
674 if (!acpi_tables_addr) {
675 WARN_ON(1);
676 return;
679 * Only calling e820_add_reserve does not work and the
680 * tables are invalid (memory got used) later.
681 * memblock_reserve works as expected and the tables won't get modified.
682 * But it's not enough on X86 because ioremap will
683 * complain later (used by acpi_os_map_memory) that the pages
684 * that should get mapped are not marked "reserved".
685 * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area)
686 * works fine.
688 memblock_reserve(acpi_tables_addr, all_tables_size);
689 arch_reserve_mem_area(acpi_tables_addr, all_tables_size);
692 * early_ioremap only can remap 256k one time. If we map all
693 * tables one time, we will hit the limit. Need to map chunks
694 * one by one during copying the same as that in relocate_initrd().
696 for (no = 0; no < table_nr; no++) {
697 unsigned char *src_p = acpi_initrd_files[no].data;
698 phys_addr_t size = acpi_initrd_files[no].size;
699 phys_addr_t dest_addr = acpi_tables_addr + total_offset;
700 phys_addr_t slop, clen;
701 char *dest_p;
703 total_offset += size;
705 while (size) {
706 slop = dest_addr & ~PAGE_MASK;
707 clen = size;
708 if (clen > MAP_CHUNK_SIZE - slop)
709 clen = MAP_CHUNK_SIZE - slop;
710 dest_p = early_ioremap(dest_addr & PAGE_MASK,
711 clen + slop);
712 memcpy(dest_p + slop, src_p, clen);
713 early_iounmap(dest_p, clen + slop);
714 src_p += clen;
715 dest_addr += clen;
716 size -= clen;
720 #endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */
722 static void acpi_table_taint(struct acpi_table_header *table)
724 pr_warn(PREFIX
725 "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n",
726 table->signature, table->oem_table_id);
727 add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE);
731 acpi_status
732 acpi_os_table_override(struct acpi_table_header * existing_table,
733 struct acpi_table_header ** new_table)
735 if (!existing_table || !new_table)
736 return AE_BAD_PARAMETER;
738 *new_table = NULL;
740 #ifdef CONFIG_ACPI_CUSTOM_DSDT
741 if (strncmp(existing_table->signature, "DSDT", 4) == 0)
742 *new_table = (struct acpi_table_header *)AmlCode;
743 #endif
744 if (*new_table != NULL)
745 acpi_table_taint(existing_table);
746 return AE_OK;
749 acpi_status
750 acpi_os_physical_table_override(struct acpi_table_header *existing_table,
751 acpi_physical_address *address,
752 u32 *table_length)
754 #ifndef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
755 *table_length = 0;
756 *address = 0;
757 return AE_OK;
758 #else
759 int table_offset = 0;
760 struct acpi_table_header *table;
762 *table_length = 0;
763 *address = 0;
765 if (!acpi_tables_addr)
766 return AE_OK;
768 do {
769 if (table_offset + ACPI_HEADER_SIZE > all_tables_size) {
770 WARN_ON(1);
771 return AE_OK;
774 table = acpi_os_map_memory(acpi_tables_addr + table_offset,
775 ACPI_HEADER_SIZE);
777 if (table_offset + table->length > all_tables_size) {
778 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
779 WARN_ON(1);
780 return AE_OK;
783 table_offset += table->length;
785 if (memcmp(existing_table->signature, table->signature, 4)) {
786 acpi_os_unmap_memory(table,
787 ACPI_HEADER_SIZE);
788 continue;
791 /* Only override tables with matching oem id */
792 if (memcmp(table->oem_table_id, existing_table->oem_table_id,
793 ACPI_OEM_TABLE_ID_SIZE)) {
794 acpi_os_unmap_memory(table,
795 ACPI_HEADER_SIZE);
796 continue;
799 table_offset -= table->length;
800 *table_length = table->length;
801 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
802 *address = acpi_tables_addr + table_offset;
803 break;
804 } while (table_offset + ACPI_HEADER_SIZE < all_tables_size);
806 if (*address != 0)
807 acpi_table_taint(existing_table);
808 return AE_OK;
809 #endif
812 static irqreturn_t acpi_irq(int irq, void *dev_id)
814 u32 handled;
816 handled = (*acpi_irq_handler) (acpi_irq_context);
818 if (handled) {
819 acpi_irq_handled++;
820 return IRQ_HANDLED;
821 } else {
822 acpi_irq_not_handled++;
823 return IRQ_NONE;
827 acpi_status
828 acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
829 void *context)
831 unsigned int irq;
833 acpi_irq_stats_init();
836 * ACPI interrupts different from the SCI in our copy of the FADT are
837 * not supported.
839 if (gsi != acpi_gbl_FADT.sci_interrupt)
840 return AE_BAD_PARAMETER;
842 if (acpi_irq_handler)
843 return AE_ALREADY_ACQUIRED;
845 if (acpi_gsi_to_irq(gsi, &irq) < 0) {
846 printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n",
847 gsi);
848 return AE_OK;
851 acpi_irq_handler = handler;
852 acpi_irq_context = context;
853 if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) {
854 printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq);
855 acpi_irq_handler = NULL;
856 return AE_NOT_ACQUIRED;
858 acpi_sci_irq = irq;
860 return AE_OK;
863 acpi_status acpi_os_remove_interrupt_handler(u32 gsi, acpi_osd_handler handler)
865 if (gsi != acpi_gbl_FADT.sci_interrupt || !acpi_sci_irq_valid())
866 return AE_BAD_PARAMETER;
868 free_irq(acpi_sci_irq, acpi_irq);
869 acpi_irq_handler = NULL;
870 acpi_sci_irq = INVALID_ACPI_IRQ;
872 return AE_OK;
876 * Running in interpreter thread context, safe to sleep
879 void acpi_os_sleep(u64 ms)
881 msleep(ms);
884 void acpi_os_stall(u32 us)
886 while (us) {
887 u32 delay = 1000;
889 if (delay > us)
890 delay = us;
891 udelay(delay);
892 touch_nmi_watchdog();
893 us -= delay;
898 * Support ACPI 3.0 AML Timer operand
899 * Returns 64-bit free-running, monotonically increasing timer
900 * with 100ns granularity
902 u64 acpi_os_get_timer(void)
904 u64 time_ns = ktime_to_ns(ktime_get());
905 do_div(time_ns, 100);
906 return time_ns;
909 acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
911 u32 dummy;
913 if (!value)
914 value = &dummy;
916 *value = 0;
917 if (width <= 8) {
918 *(u8 *) value = inb(port);
919 } else if (width <= 16) {
920 *(u16 *) value = inw(port);
921 } else if (width <= 32) {
922 *(u32 *) value = inl(port);
923 } else {
924 BUG();
927 return AE_OK;
930 EXPORT_SYMBOL(acpi_os_read_port);
932 acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
934 if (width <= 8) {
935 outb(value, port);
936 } else if (width <= 16) {
937 outw(value, port);
938 } else if (width <= 32) {
939 outl(value, port);
940 } else {
941 BUG();
944 return AE_OK;
947 EXPORT_SYMBOL(acpi_os_write_port);
949 acpi_status
950 acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width)
952 void __iomem *virt_addr;
953 unsigned int size = width / 8;
954 bool unmap = false;
955 u64 dummy;
957 rcu_read_lock();
958 virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
959 if (!virt_addr) {
960 rcu_read_unlock();
961 virt_addr = acpi_os_ioremap(phys_addr, size);
962 if (!virt_addr)
963 return AE_BAD_ADDRESS;
964 unmap = true;
967 if (!value)
968 value = &dummy;
970 switch (width) {
971 case 8:
972 *(u8 *) value = readb(virt_addr);
973 break;
974 case 16:
975 *(u16 *) value = readw(virt_addr);
976 break;
977 case 32:
978 *(u32 *) value = readl(virt_addr);
979 break;
980 case 64:
981 *(u64 *) value = readq(virt_addr);
982 break;
983 default:
984 BUG();
987 if (unmap)
988 iounmap(virt_addr);
989 else
990 rcu_read_unlock();
992 return AE_OK;
995 acpi_status
996 acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width)
998 void __iomem *virt_addr;
999 unsigned int size = width / 8;
1000 bool unmap = false;
1002 rcu_read_lock();
1003 virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
1004 if (!virt_addr) {
1005 rcu_read_unlock();
1006 virt_addr = acpi_os_ioremap(phys_addr, size);
1007 if (!virt_addr)
1008 return AE_BAD_ADDRESS;
1009 unmap = true;
1012 switch (width) {
1013 case 8:
1014 writeb(value, virt_addr);
1015 break;
1016 case 16:
1017 writew(value, virt_addr);
1018 break;
1019 case 32:
1020 writel(value, virt_addr);
1021 break;
1022 case 64:
1023 writeq(value, virt_addr);
1024 break;
1025 default:
1026 BUG();
1029 if (unmap)
1030 iounmap(virt_addr);
1031 else
1032 rcu_read_unlock();
1034 return AE_OK;
1037 acpi_status
1038 acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
1039 u64 *value, u32 width)
1041 int result, size;
1042 u32 value32;
1044 if (!value)
1045 return AE_BAD_PARAMETER;
1047 switch (width) {
1048 case 8:
1049 size = 1;
1050 break;
1051 case 16:
1052 size = 2;
1053 break;
1054 case 32:
1055 size = 4;
1056 break;
1057 default:
1058 return AE_ERROR;
1061 result = raw_pci_read(pci_id->segment, pci_id->bus,
1062 PCI_DEVFN(pci_id->device, pci_id->function),
1063 reg, size, &value32);
1064 *value = value32;
1066 return (result ? AE_ERROR : AE_OK);
1069 acpi_status
1070 acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
1071 u64 value, u32 width)
1073 int result, size;
1075 switch (width) {
1076 case 8:
1077 size = 1;
1078 break;
1079 case 16:
1080 size = 2;
1081 break;
1082 case 32:
1083 size = 4;
1084 break;
1085 default:
1086 return AE_ERROR;
1089 result = raw_pci_write(pci_id->segment, pci_id->bus,
1090 PCI_DEVFN(pci_id->device, pci_id->function),
1091 reg, size, value);
1093 return (result ? AE_ERROR : AE_OK);
1096 static void acpi_os_execute_deferred(struct work_struct *work)
1098 struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
1100 dpc->function(dpc->context);
1101 kfree(dpc);
1104 /*******************************************************************************
1106 * FUNCTION: acpi_os_execute
1108 * PARAMETERS: Type - Type of the callback
1109 * Function - Function to be executed
1110 * Context - Function parameters
1112 * RETURN: Status
1114 * DESCRIPTION: Depending on type, either queues function for deferred execution or
1115 * immediately executes function on a separate thread.
1117 ******************************************************************************/
1119 acpi_status acpi_os_execute(acpi_execute_type type,
1120 acpi_osd_exec_callback function, void *context)
1122 acpi_status status = AE_OK;
1123 struct acpi_os_dpc *dpc;
1124 struct workqueue_struct *queue;
1125 int ret;
1126 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
1127 "Scheduling function [%p(%p)] for deferred execution.\n",
1128 function, context));
1131 * Allocate/initialize DPC structure. Note that this memory will be
1132 * freed by the callee. The kernel handles the work_struct list in a
1133 * way that allows us to also free its memory inside the callee.
1134 * Because we may want to schedule several tasks with different
1135 * parameters we can't use the approach some kernel code uses of
1136 * having a static work_struct.
1139 dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC);
1140 if (!dpc)
1141 return AE_NO_MEMORY;
1143 dpc->function = function;
1144 dpc->context = context;
1147 * To prevent lockdep from complaining unnecessarily, make sure that
1148 * there is a different static lockdep key for each workqueue by using
1149 * INIT_WORK() for each of them separately.
1151 if (type == OSL_NOTIFY_HANDLER) {
1152 queue = kacpi_notify_wq;
1153 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
1154 } else {
1155 queue = kacpid_wq;
1156 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
1160 * On some machines, a software-initiated SMI causes corruption unless
1161 * the SMI runs on CPU 0. An SMI can be initiated by any AML, but
1162 * typically it's done in GPE-related methods that are run via
1163 * workqueues, so we can avoid the known corruption cases by always
1164 * queueing on CPU 0.
1166 ret = queue_work_on(0, queue, &dpc->work);
1168 if (!ret) {
1169 printk(KERN_ERR PREFIX
1170 "Call to queue_work() failed.\n");
1171 status = AE_ERROR;
1172 kfree(dpc);
1174 return status;
1176 EXPORT_SYMBOL(acpi_os_execute);
1178 void acpi_os_wait_events_complete(void)
1181 * Make sure the GPE handler or the fixed event handler is not used
1182 * on another CPU after removal.
1184 if (acpi_sci_irq_valid())
1185 synchronize_hardirq(acpi_sci_irq);
1186 flush_workqueue(kacpid_wq);
1187 flush_workqueue(kacpi_notify_wq);
1190 struct acpi_hp_work {
1191 struct work_struct work;
1192 struct acpi_device *adev;
1193 u32 src;
1196 static void acpi_hotplug_work_fn(struct work_struct *work)
1198 struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work);
1200 acpi_os_wait_events_complete();
1201 acpi_device_hotplug(hpw->adev, hpw->src);
1202 kfree(hpw);
1205 acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src)
1207 struct acpi_hp_work *hpw;
1209 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
1210 "Scheduling hotplug event (%p, %u) for deferred execution.\n",
1211 adev, src));
1213 hpw = kmalloc(sizeof(*hpw), GFP_KERNEL);
1214 if (!hpw)
1215 return AE_NO_MEMORY;
1217 INIT_WORK(&hpw->work, acpi_hotplug_work_fn);
1218 hpw->adev = adev;
1219 hpw->src = src;
1221 * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because
1222 * the hotplug code may call driver .remove() functions, which may
1223 * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush
1224 * these workqueues.
1226 if (!queue_work(kacpi_hotplug_wq, &hpw->work)) {
1227 kfree(hpw);
1228 return AE_ERROR;
1230 return AE_OK;
1233 bool acpi_queue_hotplug_work(struct work_struct *work)
1235 return queue_work(kacpi_hotplug_wq, work);
1238 acpi_status
1239 acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
1241 struct semaphore *sem = NULL;
1243 sem = acpi_os_allocate_zeroed(sizeof(struct semaphore));
1244 if (!sem)
1245 return AE_NO_MEMORY;
1247 sema_init(sem, initial_units);
1249 *handle = (acpi_handle *) sem;
1251 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n",
1252 *handle, initial_units));
1254 return AE_OK;
1258 * TODO: A better way to delete semaphores? Linux doesn't have a
1259 * 'delete_semaphore()' function -- may result in an invalid
1260 * pointer dereference for non-synchronized consumers. Should
1261 * we at least check for blocked threads and signal/cancel them?
1264 acpi_status acpi_os_delete_semaphore(acpi_handle handle)
1266 struct semaphore *sem = (struct semaphore *)handle;
1268 if (!sem)
1269 return AE_BAD_PARAMETER;
1271 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle));
1273 BUG_ON(!list_empty(&sem->wait_list));
1274 kfree(sem);
1275 sem = NULL;
1277 return AE_OK;
1281 * TODO: Support for units > 1?
1283 acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
1285 acpi_status status = AE_OK;
1286 struct semaphore *sem = (struct semaphore *)handle;
1287 long jiffies;
1288 int ret = 0;
1290 if (!acpi_os_initialized)
1291 return AE_OK;
1293 if (!sem || (units < 1))
1294 return AE_BAD_PARAMETER;
1296 if (units > 1)
1297 return AE_SUPPORT;
1299 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n",
1300 handle, units, timeout));
1302 if (timeout == ACPI_WAIT_FOREVER)
1303 jiffies = MAX_SCHEDULE_TIMEOUT;
1304 else
1305 jiffies = msecs_to_jiffies(timeout);
1307 ret = down_timeout(sem, jiffies);
1308 if (ret)
1309 status = AE_TIME;
1311 if (ACPI_FAILURE(status)) {
1312 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
1313 "Failed to acquire semaphore[%p|%d|%d], %s",
1314 handle, units, timeout,
1315 acpi_format_exception(status)));
1316 } else {
1317 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
1318 "Acquired semaphore[%p|%d|%d]", handle,
1319 units, timeout));
1322 return status;
1326 * TODO: Support for units > 1?
1328 acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
1330 struct semaphore *sem = (struct semaphore *)handle;
1332 if (!acpi_os_initialized)
1333 return AE_OK;
1335 if (!sem || (units < 1))
1336 return AE_BAD_PARAMETER;
1338 if (units > 1)
1339 return AE_SUPPORT;
1341 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle,
1342 units));
1344 up(sem);
1346 return AE_OK;
1349 acpi_status acpi_os_get_line(char *buffer, u32 buffer_length, u32 *bytes_read)
1351 #ifdef ENABLE_DEBUGGER
1352 if (acpi_in_debugger) {
1353 u32 chars;
1355 kdb_read(buffer, buffer_length);
1357 /* remove the CR kdb includes */
1358 chars = strlen(buffer) - 1;
1359 buffer[chars] = '\0';
1361 #endif
1363 return AE_OK;
1366 acpi_status acpi_os_signal(u32 function, void *info)
1368 switch (function) {
1369 case ACPI_SIGNAL_FATAL:
1370 printk(KERN_ERR PREFIX "Fatal opcode executed\n");
1371 break;
1372 case ACPI_SIGNAL_BREAKPOINT:
1374 * AML Breakpoint
1375 * ACPI spec. says to treat it as a NOP unless
1376 * you are debugging. So if/when we integrate
1377 * AML debugger into the kernel debugger its
1378 * hook will go here. But until then it is
1379 * not useful to print anything on breakpoints.
1381 break;
1382 default:
1383 break;
1386 return AE_OK;
1389 static int __init acpi_os_name_setup(char *str)
1391 char *p = acpi_os_name;
1392 int count = ACPI_MAX_OVERRIDE_LEN - 1;
1394 if (!str || !*str)
1395 return 0;
1397 for (; count-- && *str; str++) {
1398 if (isalnum(*str) || *str == ' ' || *str == ':')
1399 *p++ = *str;
1400 else if (*str == '\'' || *str == '"')
1401 continue;
1402 else
1403 break;
1405 *p = 0;
1407 return 1;
1411 __setup("acpi_os_name=", acpi_os_name_setup);
1413 #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */
1414 #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */
1416 struct osi_setup_entry {
1417 char string[OSI_STRING_LENGTH_MAX];
1418 bool enable;
1421 static struct osi_setup_entry
1422 osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = {
1423 {"Module Device", true},
1424 {"Processor Device", true},
1425 {"3.0 _SCP Extensions", true},
1426 {"Processor Aggregator Device", true},
1429 void __init acpi_osi_setup(char *str)
1431 struct osi_setup_entry *osi;
1432 bool enable = true;
1433 int i;
1435 if (!acpi_gbl_create_osi_method)
1436 return;
1438 if (str == NULL || *str == '\0') {
1439 printk(KERN_INFO PREFIX "_OSI method disabled\n");
1440 acpi_gbl_create_osi_method = FALSE;
1441 return;
1444 if (*str == '!') {
1445 str++;
1446 if (*str == '\0') {
1447 /* Do not override acpi_osi=!* */
1448 if (!osi_linux.default_disabling)
1449 osi_linux.default_disabling =
1450 ACPI_DISABLE_ALL_VENDOR_STRINGS;
1451 return;
1452 } else if (*str == '*') {
1453 osi_linux.default_disabling = ACPI_DISABLE_ALL_STRINGS;
1454 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1455 osi = &osi_setup_entries[i];
1456 osi->enable = false;
1458 return;
1460 enable = false;
1463 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1464 osi = &osi_setup_entries[i];
1465 if (!strcmp(osi->string, str)) {
1466 osi->enable = enable;
1467 break;
1468 } else if (osi->string[0] == '\0') {
1469 osi->enable = enable;
1470 strncpy(osi->string, str, OSI_STRING_LENGTH_MAX);
1471 break;
1476 static void __init set_osi_linux(unsigned int enable)
1478 if (osi_linux.enable != enable)
1479 osi_linux.enable = enable;
1481 if (osi_linux.enable)
1482 acpi_osi_setup("Linux");
1483 else
1484 acpi_osi_setup("!Linux");
1486 return;
1489 static void __init acpi_cmdline_osi_linux(unsigned int enable)
1491 osi_linux.cmdline = 1; /* cmdline set the default and override DMI */
1492 osi_linux.dmi = 0;
1493 set_osi_linux(enable);
1495 return;
1498 void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d)
1500 printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident);
1502 if (enable == -1)
1503 return;
1505 osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */
1506 set_osi_linux(enable);
1508 return;
1512 * Modify the list of "OS Interfaces" reported to BIOS via _OSI
1514 * empty string disables _OSI
1515 * string starting with '!' disables that string
1516 * otherwise string is added to list, augmenting built-in strings
1518 static void __init acpi_osi_setup_late(void)
1520 struct osi_setup_entry *osi;
1521 char *str;
1522 int i;
1523 acpi_status status;
1525 if (osi_linux.default_disabling) {
1526 status = acpi_update_interfaces(osi_linux.default_disabling);
1528 if (ACPI_SUCCESS(status))
1529 printk(KERN_INFO PREFIX "Disabled all _OSI OS vendors%s\n",
1530 osi_linux.default_disabling ==
1531 ACPI_DISABLE_ALL_STRINGS ?
1532 " and feature groups" : "");
1535 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1536 osi = &osi_setup_entries[i];
1537 str = osi->string;
1539 if (*str == '\0')
1540 break;
1541 if (osi->enable) {
1542 status = acpi_install_interface(str);
1544 if (ACPI_SUCCESS(status))
1545 printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
1546 } else {
1547 status = acpi_remove_interface(str);
1549 if (ACPI_SUCCESS(status))
1550 printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
1555 static int __init osi_setup(char *str)
1557 if (str && !strcmp("Linux", str))
1558 acpi_cmdline_osi_linux(1);
1559 else if (str && !strcmp("!Linux", str))
1560 acpi_cmdline_osi_linux(0);
1561 else
1562 acpi_osi_setup(str);
1564 return 1;
1567 __setup("acpi_osi=", osi_setup);
1570 * Disable the auto-serialization of named objects creation methods.
1572 * This feature is enabled by default. It marks the AML control methods
1573 * that contain the opcodes to create named objects as "Serialized".
1575 static int __init acpi_no_auto_serialize_setup(char *str)
1577 acpi_gbl_auto_serialize_methods = FALSE;
1578 pr_info("ACPI: auto-serialization disabled\n");
1580 return 1;
1583 __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup);
1585 /* Check of resource interference between native drivers and ACPI
1586 * OperationRegions (SystemIO and System Memory only).
1587 * IO ports and memory declared in ACPI might be used by the ACPI subsystem
1588 * in arbitrary AML code and can interfere with legacy drivers.
1589 * acpi_enforce_resources= can be set to:
1591 * - strict (default) (2)
1592 * -> further driver trying to access the resources will not load
1593 * - lax (1)
1594 * -> further driver trying to access the resources will load, but you
1595 * get a system message that something might go wrong...
1597 * - no (0)
1598 * -> ACPI Operation Region resources will not be registered
1601 #define ENFORCE_RESOURCES_STRICT 2
1602 #define ENFORCE_RESOURCES_LAX 1
1603 #define ENFORCE_RESOURCES_NO 0
1605 static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1607 static int __init acpi_enforce_resources_setup(char *str)
1609 if (str == NULL || *str == '\0')
1610 return 0;
1612 if (!strcmp("strict", str))
1613 acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1614 else if (!strcmp("lax", str))
1615 acpi_enforce_resources = ENFORCE_RESOURCES_LAX;
1616 else if (!strcmp("no", str))
1617 acpi_enforce_resources = ENFORCE_RESOURCES_NO;
1619 return 1;
1622 __setup("acpi_enforce_resources=", acpi_enforce_resources_setup);
1624 /* Check for resource conflicts between ACPI OperationRegions and native
1625 * drivers */
1626 int acpi_check_resource_conflict(const struct resource *res)
1628 acpi_adr_space_type space_id;
1629 acpi_size length;
1630 u8 warn = 0;
1631 int clash = 0;
1633 if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
1634 return 0;
1635 if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM))
1636 return 0;
1638 if (res->flags & IORESOURCE_IO)
1639 space_id = ACPI_ADR_SPACE_SYSTEM_IO;
1640 else
1641 space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY;
1643 length = resource_size(res);
1644 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO)
1645 warn = 1;
1646 clash = acpi_check_address_range(space_id, res->start, length, warn);
1648 if (clash) {
1649 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) {
1650 if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX)
1651 printk(KERN_NOTICE "ACPI: This conflict may"
1652 " cause random problems and system"
1653 " instability\n");
1654 printk(KERN_INFO "ACPI: If an ACPI driver is available"
1655 " for this device, you should use it instead of"
1656 " the native driver\n");
1658 if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT)
1659 return -EBUSY;
1661 return 0;
1663 EXPORT_SYMBOL(acpi_check_resource_conflict);
1665 int acpi_check_region(resource_size_t start, resource_size_t n,
1666 const char *name)
1668 struct resource res = {
1669 .start = start,
1670 .end = start + n - 1,
1671 .name = name,
1672 .flags = IORESOURCE_IO,
1675 return acpi_check_resource_conflict(&res);
1677 EXPORT_SYMBOL(acpi_check_region);
1680 * Let drivers know whether the resource checks are effective
1682 int acpi_resources_are_enforced(void)
1684 return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT;
1686 EXPORT_SYMBOL(acpi_resources_are_enforced);
1688 bool acpi_osi_is_win8(void)
1690 return acpi_gbl_osi_data >= ACPI_OSI_WIN_8;
1692 EXPORT_SYMBOL(acpi_osi_is_win8);
1695 * Deallocate the memory for a spinlock.
1697 void acpi_os_delete_lock(acpi_spinlock handle)
1699 ACPI_FREE(handle);
1703 * Acquire a spinlock.
1705 * handle is a pointer to the spinlock_t.
1708 acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp)
1710 acpi_cpu_flags flags;
1711 spin_lock_irqsave(lockp, flags);
1712 return flags;
1716 * Release a spinlock. See above.
1719 void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags)
1721 spin_unlock_irqrestore(lockp, flags);
1724 #ifndef ACPI_USE_LOCAL_CACHE
1726 /*******************************************************************************
1728 * FUNCTION: acpi_os_create_cache
1730 * PARAMETERS: name - Ascii name for the cache
1731 * size - Size of each cached object
1732 * depth - Maximum depth of the cache (in objects) <ignored>
1733 * cache - Where the new cache object is returned
1735 * RETURN: status
1737 * DESCRIPTION: Create a cache object
1739 ******************************************************************************/
1741 acpi_status
1742 acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache)
1744 *cache = kmem_cache_create(name, size, 0, 0, NULL);
1745 if (*cache == NULL)
1746 return AE_ERROR;
1747 else
1748 return AE_OK;
1751 /*******************************************************************************
1753 * FUNCTION: acpi_os_purge_cache
1755 * PARAMETERS: Cache - Handle to cache object
1757 * RETURN: Status
1759 * DESCRIPTION: Free all objects within the requested cache.
1761 ******************************************************************************/
1763 acpi_status acpi_os_purge_cache(acpi_cache_t * cache)
1765 kmem_cache_shrink(cache);
1766 return (AE_OK);
1769 /*******************************************************************************
1771 * FUNCTION: acpi_os_delete_cache
1773 * PARAMETERS: Cache - Handle to cache object
1775 * RETURN: Status
1777 * DESCRIPTION: Free all objects within the requested cache and delete the
1778 * cache object.
1780 ******************************************************************************/
1782 acpi_status acpi_os_delete_cache(acpi_cache_t * cache)
1784 kmem_cache_destroy(cache);
1785 return (AE_OK);
1788 /*******************************************************************************
1790 * FUNCTION: acpi_os_release_object
1792 * PARAMETERS: Cache - Handle to cache object
1793 * Object - The object to be released
1795 * RETURN: None
1797 * DESCRIPTION: Release an object to the specified cache. If cache is full,
1798 * the object is deleted.
1800 ******************************************************************************/
1802 acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)
1804 kmem_cache_free(cache, object);
1805 return (AE_OK);
1807 #endif
1809 static int __init acpi_no_static_ssdt_setup(char *s)
1811 acpi_gbl_disable_ssdt_table_install = TRUE;
1812 pr_info("ACPI: static SSDT installation disabled\n");
1814 return 0;
1817 early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup);
1819 static int __init acpi_disable_return_repair(char *s)
1821 printk(KERN_NOTICE PREFIX
1822 "ACPI: Predefined validation mechanism disabled\n");
1823 acpi_gbl_disable_auto_repair = TRUE;
1825 return 1;
1828 __setup("acpica_no_return_repair", acpi_disable_return_repair);
1830 acpi_status __init acpi_os_initialize(void)
1832 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
1833 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
1834 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block);
1835 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block);
1836 if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) {
1838 * Use acpi_os_map_generic_address to pre-map the reset
1839 * register if it's in system memory.
1841 int rv;
1843 rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register);
1844 pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv);
1846 acpi_os_initialized = true;
1848 return AE_OK;
1851 acpi_status __init acpi_os_initialize1(void)
1853 kacpid_wq = alloc_workqueue("kacpid", 0, 1);
1854 kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1);
1855 kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0);
1856 BUG_ON(!kacpid_wq);
1857 BUG_ON(!kacpi_notify_wq);
1858 BUG_ON(!kacpi_hotplug_wq);
1859 acpi_install_interface_handler(acpi_osi_handler);
1860 acpi_osi_setup_late();
1861 return AE_OK;
1864 acpi_status acpi_os_terminate(void)
1866 if (acpi_irq_handler) {
1867 acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt,
1868 acpi_irq_handler);
1871 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block);
1872 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block);
1873 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
1874 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
1875 if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER)
1876 acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register);
1878 destroy_workqueue(kacpid_wq);
1879 destroy_workqueue(kacpi_notify_wq);
1880 destroy_workqueue(kacpi_hotplug_wq);
1882 return AE_OK;
1885 acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control,
1886 u32 pm1b_control)
1888 int rc = 0;
1889 if (__acpi_os_prepare_sleep)
1890 rc = __acpi_os_prepare_sleep(sleep_state,
1891 pm1a_control, pm1b_control);
1892 if (rc < 0)
1893 return AE_ERROR;
1894 else if (rc > 0)
1895 return AE_CTRL_SKIP;
1897 return AE_OK;
1900 void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state,
1901 u32 pm1a_ctrl, u32 pm1b_ctrl))
1903 __acpi_os_prepare_sleep = func;
1906 acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a,
1907 u32 val_b)
1909 int rc = 0;
1910 if (__acpi_os_prepare_extended_sleep)
1911 rc = __acpi_os_prepare_extended_sleep(sleep_state,
1912 val_a, val_b);
1913 if (rc < 0)
1914 return AE_ERROR;
1915 else if (rc > 0)
1916 return AE_CTRL_SKIP;
1918 return AE_OK;
1921 void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state,
1922 u32 val_a, u32 val_b))
1924 __acpi_os_prepare_extended_sleep = func;