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1da177e4 LT |
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> | |
f1241c87 MW |
7 | * Copyright (c) 2008 Intel Corporation |
8 | * Author: Matthew Wilcox <willy@linux.intel.com> | |
1da177e4 LT |
9 | * |
10 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
25 | * | |
26 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
27 | * | |
28 | */ | |
29 | ||
1da177e4 LT |
30 | #include <linux/module.h> |
31 | #include <linux/kernel.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/mm.h> | |
34 | #include <linux/pci.h> | |
1da177e4 LT |
35 | #include <linux/interrupt.h> |
36 | #include <linux/kmod.h> | |
37 | #include <linux/delay.h> | |
38 | #include <linux/workqueue.h> | |
39 | #include <linux/nmi.h> | |
ad71860a | 40 | #include <linux/acpi.h> |
1da177e4 | 41 | #include <linux/efi.h> |
df92e695 TR |
42 | #include <linux/ioport.h> |
43 | #include <linux/list.h> | |
f1241c87 MW |
44 | #include <linux/jiffies.h> |
45 | #include <linux/semaphore.h> | |
46 | ||
47 | #include <asm/io.h> | |
48 | #include <asm/uaccess.h> | |
49 | ||
50 | #include <acpi/acpi.h> | |
51 | #include <acpi/acpi_bus.h> | |
52 | #include <acpi/processor.h> | |
1da177e4 | 53 | |
1da177e4 | 54 | #define _COMPONENT ACPI_OS_SERVICES |
f52fd66d | 55 | ACPI_MODULE_NAME("osl"); |
1da177e4 | 56 | #define PREFIX "ACPI: " |
4be44fcd LB |
57 | struct acpi_os_dpc { |
58 | acpi_osd_exec_callback function; | |
59 | void *context; | |
65f27f38 | 60 | struct work_struct work; |
9ac61856 | 61 | int wait; |
1da177e4 LT |
62 | }; |
63 | ||
64 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
65 | #include CONFIG_ACPI_CUSTOM_DSDT_FILE | |
66 | #endif | |
67 | ||
68 | #ifdef ENABLE_DEBUGGER | |
69 | #include <linux/kdb.h> | |
70 | ||
71 | /* stuff for debugger support */ | |
72 | int acpi_in_debugger; | |
73 | EXPORT_SYMBOL(acpi_in_debugger); | |
74 | ||
75 | extern char line_buf[80]; | |
4be44fcd | 76 | #endif /*ENABLE_DEBUGGER */ |
1da177e4 LT |
77 | |
78 | static unsigned int acpi_irq_irq; | |
79 | static acpi_osd_handler acpi_irq_handler; | |
80 | static void *acpi_irq_context; | |
81 | static struct workqueue_struct *kacpid_wq; | |
88db5e14 | 82 | static struct workqueue_struct *kacpi_notify_wq; |
c02256be | 83 | static struct workqueue_struct *kacpi_hotplug_wq; |
1da177e4 | 84 | |
df92e695 TR |
85 | struct acpi_res_list { |
86 | resource_size_t start; | |
87 | resource_size_t end; | |
88 | acpi_adr_space_type resource_type; /* IO port, System memory, ...*/ | |
89 | char name[5]; /* only can have a length of 4 chars, make use of this | |
90 | one instead of res->name, no need to kalloc then */ | |
91 | struct list_head resource_list; | |
a5fe1a03 | 92 | int count; |
df92e695 TR |
93 | }; |
94 | ||
95 | static LIST_HEAD(resource_list_head); | |
96 | static DEFINE_SPINLOCK(acpi_res_lock); | |
97 | ||
620242ae MS |
98 | /* |
99 | * This list of permanent mappings is for memory that may be accessed from | |
100 | * interrupt context, where we can't do the ioremap(). | |
101 | */ | |
102 | struct acpi_ioremap { | |
103 | struct list_head list; | |
104 | void __iomem *virt; | |
105 | acpi_physical_address phys; | |
106 | acpi_size size; | |
4a3cba5e | 107 | struct kref ref; |
620242ae MS |
108 | }; |
109 | ||
110 | static LIST_HEAD(acpi_ioremaps); | |
111 | static DEFINE_SPINLOCK(acpi_ioremap_lock); | |
112 | ||
ae00d812 | 113 | #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ |
b0ed7a91 LM |
114 | static char osi_setup_string[OSI_STRING_LENGTH_MAX]; |
115 | ||
116 | static void __init acpi_osi_setup_late(void); | |
ae00d812 | 117 | |
d4b7dc49 | 118 | /* |
a6e0887f | 119 | * The story of _OSI(Linux) |
d4b7dc49 | 120 | * |
a6e0887f LB |
121 | * From pre-history through Linux-2.6.22, |
122 | * Linux responded TRUE upon a BIOS OSI(Linux) query. | |
d4b7dc49 | 123 | * |
a6e0887f LB |
124 | * Unfortunately, reference BIOS writers got wind of this |
125 | * and put OSI(Linux) in their example code, quickly exposing | |
126 | * this string as ill-conceived and opening the door to | |
127 | * an un-bounded number of BIOS incompatibilities. | |
d4b7dc49 | 128 | * |
a6e0887f LB |
129 | * For example, OSI(Linux) was used on resume to re-POST a |
130 | * video card on one system, because Linux at that time | |
131 | * could not do a speedy restore in its native driver. | |
132 | * But then upon gaining quick native restore capability, | |
133 | * Linux has no way to tell the BIOS to skip the time-consuming | |
134 | * POST -- putting Linux at a permanent performance disadvantage. | |
135 | * On another system, the BIOS writer used OSI(Linux) | |
136 | * to infer native OS support for IPMI! On other systems, | |
137 | * OSI(Linux) simply got in the way of Linux claiming to | |
138 | * be compatible with other operating systems, exposing | |
139 | * BIOS issues such as skipped device initialization. | |
d4b7dc49 | 140 | * |
a6e0887f LB |
141 | * So "Linux" turned out to be a really poor chose of |
142 | * OSI string, and from Linux-2.6.23 onward we respond FALSE. | |
d4b7dc49 LB |
143 | * |
144 | * BIOS writers should NOT query _OSI(Linux) on future systems. | |
a6e0887f LB |
145 | * Linux will complain on the console when it sees it, and return FALSE. |
146 | * To get Linux to return TRUE for your system will require | |
147 | * a kernel source update to add a DMI entry, | |
148 | * or boot with "acpi_osi=Linux" | |
d4b7dc49 | 149 | */ |
d4b7dc49 | 150 | |
1d15d84e | 151 | static struct osi_linux { |
d4b7dc49 LB |
152 | unsigned int enable:1; |
153 | unsigned int dmi:1; | |
154 | unsigned int cmdline:1; | |
d90aa92c | 155 | } osi_linux = {0, 0, 0}; |
f507654d | 156 | |
b0ed7a91 LM |
157 | static u32 acpi_osi_handler(acpi_string interface, u32 supported) |
158 | { | |
159 | if (!strcmp("Linux", interface)) { | |
160 | ||
3af283e1 | 161 | printk(KERN_NOTICE FW_BUG PREFIX |
b0ed7a91 LM |
162 | "BIOS _OSI(Linux) query %s%s\n", |
163 | osi_linux.enable ? "honored" : "ignored", | |
164 | osi_linux.cmdline ? " via cmdline" : | |
165 | osi_linux.dmi ? " via DMI" : ""); | |
166 | } | |
167 | ||
168 | return supported; | |
169 | } | |
170 | ||
9a47cdb1 BH |
171 | static void __init acpi_request_region (struct acpi_generic_address *addr, |
172 | unsigned int length, char *desc) | |
173 | { | |
9a47cdb1 BH |
174 | if (!addr->address || !length) |
175 | return; | |
176 | ||
cfa806f0 | 177 | /* Resources are never freed */ |
eee3c859 | 178 | if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_IO) |
cfa806f0 | 179 | request_region(addr->address, length, desc); |
eee3c859 | 180 | else if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) |
cfa806f0 | 181 | request_mem_region(addr->address, length, desc); |
9a47cdb1 BH |
182 | } |
183 | ||
184 | static int __init acpi_reserve_resources(void) | |
185 | { | |
eee3c859 | 186 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
187 | "ACPI PM1a_EVT_BLK"); |
188 | ||
eee3c859 | 189 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
190 | "ACPI PM1b_EVT_BLK"); |
191 | ||
eee3c859 | 192 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
193 | "ACPI PM1a_CNT_BLK"); |
194 | ||
eee3c859 | 195 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
196 | "ACPI PM1b_CNT_BLK"); |
197 | ||
eee3c859 LB |
198 | if (acpi_gbl_FADT.pm_timer_length == 4) |
199 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); | |
9a47cdb1 | 200 | |
eee3c859 | 201 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
9a47cdb1 BH |
202 | "ACPI PM2_CNT_BLK"); |
203 | ||
204 | /* Length of GPE blocks must be a non-negative multiple of 2 */ | |
205 | ||
eee3c859 LB |
206 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
207 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, | |
208 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); | |
9a47cdb1 | 209 | |
eee3c859 LB |
210 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
211 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, | |
212 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); | |
9a47cdb1 BH |
213 | |
214 | return 0; | |
215 | } | |
216 | device_initcall(acpi_reserve_resources); | |
217 | ||
4be44fcd | 218 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
219 | { |
220 | va_list args; | |
221 | va_start(args, fmt); | |
222 | acpi_os_vprintf(fmt, args); | |
223 | va_end(args); | |
224 | } | |
4be44fcd | 225 | |
4be44fcd | 226 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
227 | { |
228 | static char buffer[512]; | |
4be44fcd | 229 | |
1da177e4 LT |
230 | vsprintf(buffer, fmt, args); |
231 | ||
232 | #ifdef ENABLE_DEBUGGER | |
233 | if (acpi_in_debugger) { | |
234 | kdb_printf("%s", buffer); | |
235 | } else { | |
4d939155 | 236 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
237 | } |
238 | #else | |
4d939155 | 239 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
240 | #endif |
241 | } | |
242 | ||
ad71860a | 243 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
1da177e4 LT |
244 | { |
245 | if (efi_enabled) { | |
b2c99e3c | 246 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
ad71860a | 247 | return efi.acpi20; |
b2c99e3c | 248 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
ad71860a | 249 | return efi.acpi; |
1da177e4 | 250 | else { |
4be44fcd LB |
251 | printk(KERN_ERR PREFIX |
252 | "System description tables not found\n"); | |
ad71860a | 253 | return 0; |
1da177e4 | 254 | } |
239665a3 LB |
255 | } else { |
256 | acpi_physical_address pa = 0; | |
257 | ||
258 | acpi_find_root_pointer(&pa); | |
259 | return pa; | |
260 | } | |
1da177e4 LT |
261 | } |
262 | ||
78cdb3ed | 263 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
4a3cba5e MS |
264 | static struct acpi_ioremap * |
265 | acpi_map_lookup(acpi_physical_address phys, acpi_size size) | |
620242ae MS |
266 | { |
267 | struct acpi_ioremap *map; | |
268 | ||
78cdb3ed | 269 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
620242ae MS |
270 | if (map->phys <= phys && |
271 | phys + size <= map->phys + map->size) | |
4a3cba5e MS |
272 | return map; |
273 | ||
274 | return NULL; | |
275 | } | |
276 | ||
277 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ | |
278 | static void __iomem * | |
279 | acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size) | |
280 | { | |
281 | struct acpi_ioremap *map; | |
282 | ||
283 | map = acpi_map_lookup(phys, size); | |
284 | if (map) | |
285 | return map->virt + (phys - map->phys); | |
620242ae MS |
286 | |
287 | return NULL; | |
288 | } | |
289 | ||
78cdb3ed | 290 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
620242ae MS |
291 | static struct acpi_ioremap * |
292 | acpi_map_lookup_virt(void __iomem *virt, acpi_size size) | |
293 | { | |
294 | struct acpi_ioremap *map; | |
295 | ||
78cdb3ed | 296 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
4a3cba5e MS |
297 | if (map->virt <= virt && |
298 | virt + size <= map->virt + map->size) | |
620242ae MS |
299 | return map; |
300 | ||
301 | return NULL; | |
302 | } | |
303 | ||
2fdf0741 JB |
304 | void __iomem *__init_refok |
305 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size) | |
1da177e4 | 306 | { |
4a3cba5e MS |
307 | struct acpi_ioremap *map, *tmp_map; |
308 | unsigned long flags, pg_sz; | |
620242ae | 309 | void __iomem *virt; |
4a3cba5e | 310 | phys_addr_t pg_off; |
620242ae | 311 | |
9f4fd61f BH |
312 | if (phys > ULONG_MAX) { |
313 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
70c0846e | 314 | return NULL; |
1da177e4 | 315 | } |
620242ae MS |
316 | |
317 | if (!acpi_gbl_permanent_mmap) | |
ad71860a | 318 | return __acpi_map_table((unsigned long)phys, size); |
620242ae MS |
319 | |
320 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
321 | if (!map) | |
322 | return NULL; | |
323 | ||
4a3cba5e MS |
324 | pg_off = round_down(phys, PAGE_SIZE); |
325 | pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; | |
326 | virt = ioremap(pg_off, pg_sz); | |
620242ae MS |
327 | if (!virt) { |
328 | kfree(map); | |
329 | return NULL; | |
330 | } | |
331 | ||
332 | INIT_LIST_HEAD(&map->list); | |
333 | map->virt = virt; | |
4a3cba5e MS |
334 | map->phys = pg_off; |
335 | map->size = pg_sz; | |
336 | kref_init(&map->ref); | |
620242ae MS |
337 | |
338 | spin_lock_irqsave(&acpi_ioremap_lock, flags); | |
4a3cba5e MS |
339 | /* Check if page has already been mapped. */ |
340 | tmp_map = acpi_map_lookup(phys, size); | |
341 | if (tmp_map) { | |
342 | kref_get(&tmp_map->ref); | |
343 | spin_unlock_irqrestore(&acpi_ioremap_lock, flags); | |
344 | iounmap(map->virt); | |
345 | kfree(map); | |
346 | return tmp_map->virt + (phys - tmp_map->phys); | |
347 | } | |
78cdb3ed | 348 | list_add_tail_rcu(&map->list, &acpi_ioremaps); |
620242ae MS |
349 | spin_unlock_irqrestore(&acpi_ioremap_lock, flags); |
350 | ||
4a3cba5e | 351 | return map->virt + (phys - map->phys); |
1da177e4 | 352 | } |
55a82ab3 | 353 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 354 | |
4a3cba5e MS |
355 | static void acpi_kref_del_iomap(struct kref *ref) |
356 | { | |
357 | struct acpi_ioremap *map; | |
358 | ||
359 | map = container_of(ref, struct acpi_ioremap, ref); | |
360 | list_del_rcu(&map->list); | |
361 | } | |
362 | ||
0d3a9cf5 | 363 | void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
1da177e4 | 364 | { |
620242ae MS |
365 | struct acpi_ioremap *map; |
366 | unsigned long flags; | |
4a3cba5e | 367 | int del; |
620242ae MS |
368 | |
369 | if (!acpi_gbl_permanent_mmap) { | |
7d97277b | 370 | __acpi_unmap_table(virt, size); |
620242ae MS |
371 | return; |
372 | } | |
373 | ||
374 | spin_lock_irqsave(&acpi_ioremap_lock, flags); | |
375 | map = acpi_map_lookup_virt(virt, size); | |
376 | if (!map) { | |
377 | spin_unlock_irqrestore(&acpi_ioremap_lock, flags); | |
378 | printk(KERN_ERR PREFIX "%s: bad address %p\n", __func__, virt); | |
379 | dump_stack(); | |
380 | return; | |
381 | } | |
382 | ||
4a3cba5e | 383 | del = kref_put(&map->ref, acpi_kref_del_iomap); |
620242ae MS |
384 | spin_unlock_irqrestore(&acpi_ioremap_lock, flags); |
385 | ||
4a3cba5e MS |
386 | if (!del) |
387 | return; | |
388 | ||
78cdb3ed | 389 | synchronize_rcu(); |
620242ae MS |
390 | iounmap(map->virt); |
391 | kfree(map); | |
1da177e4 | 392 | } |
55a82ab3 | 393 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 | 394 | |
0d3a9cf5 | 395 | void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
7d97277b YL |
396 | { |
397 | if (!acpi_gbl_permanent_mmap) | |
398 | __acpi_unmap_table(virt, size); | |
399 | } | |
400 | ||
29718521 MS |
401 | int acpi_os_map_generic_address(struct acpi_generic_address *addr) |
402 | { | |
403 | void __iomem *virt; | |
404 | ||
405 | if (addr->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) | |
406 | return 0; | |
407 | ||
408 | if (!addr->address || !addr->bit_width) | |
409 | return -EINVAL; | |
410 | ||
411 | virt = acpi_os_map_memory(addr->address, addr->bit_width / 8); | |
412 | if (!virt) | |
413 | return -EIO; | |
414 | ||
415 | return 0; | |
416 | } | |
417 | EXPORT_SYMBOL_GPL(acpi_os_map_generic_address); | |
418 | ||
419 | void acpi_os_unmap_generic_address(struct acpi_generic_address *addr) | |
420 | { | |
421 | void __iomem *virt; | |
422 | unsigned long flags; | |
423 | acpi_size size = addr->bit_width / 8; | |
424 | ||
425 | if (addr->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) | |
426 | return; | |
427 | ||
428 | if (!addr->address || !addr->bit_width) | |
429 | return; | |
430 | ||
431 | spin_lock_irqsave(&acpi_ioremap_lock, flags); | |
432 | virt = acpi_map_vaddr_lookup(addr->address, size); | |
433 | spin_unlock_irqrestore(&acpi_ioremap_lock, flags); | |
434 | ||
435 | acpi_os_unmap_memory(virt, size); | |
436 | } | |
437 | EXPORT_SYMBOL_GPL(acpi_os_unmap_generic_address); | |
438 | ||
1da177e4 LT |
439 | #ifdef ACPI_FUTURE_USAGE |
440 | acpi_status | |
4be44fcd | 441 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 442 | { |
4be44fcd | 443 | if (!phys || !virt) |
1da177e4 LT |
444 | return AE_BAD_PARAMETER; |
445 | ||
446 | *phys = virt_to_phys(virt); | |
447 | ||
448 | return AE_OK; | |
449 | } | |
450 | #endif | |
451 | ||
452 | #define ACPI_MAX_OVERRIDE_LEN 100 | |
453 | ||
454 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
455 | ||
456 | acpi_status | |
4be44fcd LB |
457 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
458 | acpi_string * new_val) | |
1da177e4 LT |
459 | { |
460 | if (!init_val || !new_val) | |
461 | return AE_BAD_PARAMETER; | |
462 | ||
463 | *new_val = NULL; | |
4be44fcd | 464 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 465 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 466 | acpi_os_name); |
1da177e4 LT |
467 | *new_val = acpi_os_name; |
468 | } | |
469 | ||
470 | return AE_OK; | |
471 | } | |
472 | ||
473 | acpi_status | |
4be44fcd LB |
474 | acpi_os_table_override(struct acpi_table_header * existing_table, |
475 | struct acpi_table_header ** new_table) | |
1da177e4 LT |
476 | { |
477 | if (!existing_table || !new_table) | |
478 | return AE_BAD_PARAMETER; | |
479 | ||
71fc47a9 MG |
480 | *new_table = NULL; |
481 | ||
1da177e4 LT |
482 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
483 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
4be44fcd | 484 | *new_table = (struct acpi_table_header *)AmlCode; |
1da177e4 | 485 | #endif |
6ed31e92 ÉP |
486 | if (*new_table != NULL) { |
487 | printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], " | |
488 | "this is unsafe: tainting kernel\n", | |
489 | existing_table->signature, | |
490 | existing_table->oem_table_id); | |
491 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE); | |
492 | } | |
1da177e4 LT |
493 | return AE_OK; |
494 | } | |
495 | ||
7d12e780 | 496 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 497 | { |
5229e87d LB |
498 | u32 handled; |
499 | ||
500 | handled = (*acpi_irq_handler) (acpi_irq_context); | |
501 | ||
502 | if (handled) { | |
503 | acpi_irq_handled++; | |
504 | return IRQ_HANDLED; | |
88bea188 LB |
505 | } else { |
506 | acpi_irq_not_handled++; | |
5229e87d | 507 | return IRQ_NONE; |
88bea188 | 508 | } |
1da177e4 LT |
509 | } |
510 | ||
511 | acpi_status | |
4be44fcd LB |
512 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
513 | void *context) | |
1da177e4 LT |
514 | { |
515 | unsigned int irq; | |
516 | ||
5229e87d LB |
517 | acpi_irq_stats_init(); |
518 | ||
1da177e4 LT |
519 | /* |
520 | * Ignore the GSI from the core, and use the value in our copy of the | |
521 | * FADT. It may not be the same if an interrupt source override exists | |
522 | * for the SCI. | |
523 | */ | |
cee324b1 | 524 | gsi = acpi_gbl_FADT.sci_interrupt; |
1da177e4 LT |
525 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
526 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
527 | gsi); | |
528 | return AE_OK; | |
529 | } | |
530 | ||
531 | acpi_irq_handler = handler; | |
532 | acpi_irq_context = context; | |
dace1453 | 533 | if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
1da177e4 LT |
534 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
535 | return AE_NOT_ACQUIRED; | |
536 | } | |
537 | acpi_irq_irq = irq; | |
538 | ||
539 | return AE_OK; | |
540 | } | |
541 | ||
4be44fcd | 542 | acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) |
1da177e4 LT |
543 | { |
544 | if (irq) { | |
545 | free_irq(irq, acpi_irq); | |
546 | acpi_irq_handler = NULL; | |
547 | acpi_irq_irq = 0; | |
548 | } | |
549 | ||
550 | return AE_OK; | |
551 | } | |
552 | ||
553 | /* | |
554 | * Running in interpreter thread context, safe to sleep | |
555 | */ | |
556 | ||
439913ff | 557 | void acpi_os_sleep(u64 ms) |
1da177e4 | 558 | { |
01a527ec | 559 | schedule_timeout_interruptible(msecs_to_jiffies(ms)); |
1da177e4 | 560 | } |
4be44fcd | 561 | |
4be44fcd | 562 | void acpi_os_stall(u32 us) |
1da177e4 LT |
563 | { |
564 | while (us) { | |
565 | u32 delay = 1000; | |
566 | ||
567 | if (delay > us) | |
568 | delay = us; | |
569 | udelay(delay); | |
570 | touch_nmi_watchdog(); | |
571 | us -= delay; | |
572 | } | |
573 | } | |
4be44fcd | 574 | |
1da177e4 LT |
575 | /* |
576 | * Support ACPI 3.0 AML Timer operand | |
577 | * Returns 64-bit free-running, monotonically increasing timer | |
578 | * with 100ns granularity | |
579 | */ | |
4be44fcd | 580 | u64 acpi_os_get_timer(void) |
1da177e4 LT |
581 | { |
582 | static u64 t; | |
583 | ||
584 | #ifdef CONFIG_HPET | |
585 | /* TBD: use HPET if available */ | |
586 | #endif | |
587 | ||
588 | #ifdef CONFIG_X86_PM_TIMER | |
589 | /* TBD: default to PM timer if HPET was not available */ | |
590 | #endif | |
591 | if (!t) | |
592 | printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n"); | |
593 | ||
594 | return ++t; | |
595 | } | |
596 | ||
4be44fcd | 597 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
598 | { |
599 | u32 dummy; | |
600 | ||
601 | if (!value) | |
602 | value = &dummy; | |
603 | ||
49fbabf5 ZY |
604 | *value = 0; |
605 | if (width <= 8) { | |
4be44fcd | 606 | *(u8 *) value = inb(port); |
49fbabf5 | 607 | } else if (width <= 16) { |
4be44fcd | 608 | *(u16 *) value = inw(port); |
49fbabf5 | 609 | } else if (width <= 32) { |
4be44fcd | 610 | *(u32 *) value = inl(port); |
49fbabf5 | 611 | } else { |
1da177e4 LT |
612 | BUG(); |
613 | } | |
614 | ||
615 | return AE_OK; | |
616 | } | |
4be44fcd | 617 | |
1da177e4 LT |
618 | EXPORT_SYMBOL(acpi_os_read_port); |
619 | ||
4be44fcd | 620 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 621 | { |
49fbabf5 | 622 | if (width <= 8) { |
1da177e4 | 623 | outb(value, port); |
49fbabf5 | 624 | } else if (width <= 16) { |
1da177e4 | 625 | outw(value, port); |
49fbabf5 | 626 | } else if (width <= 32) { |
1da177e4 | 627 | outl(value, port); |
49fbabf5 | 628 | } else { |
1da177e4 LT |
629 | BUG(); |
630 | } | |
631 | ||
632 | return AE_OK; | |
633 | } | |
4be44fcd | 634 | |
1da177e4 LT |
635 | EXPORT_SYMBOL(acpi_os_write_port); |
636 | ||
637 | acpi_status | |
4be44fcd | 638 | acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width) |
1da177e4 | 639 | { |
4be44fcd LB |
640 | u32 dummy; |
641 | void __iomem *virt_addr; | |
620242ae | 642 | int size = width / 8, unmap = 0; |
620242ae | 643 | |
78cdb3ed | 644 | rcu_read_lock(); |
620242ae | 645 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); |
78cdb3ed | 646 | rcu_read_unlock(); |
620242ae MS |
647 | if (!virt_addr) { |
648 | virt_addr = ioremap(phys_addr, size); | |
649 | unmap = 1; | |
650 | } | |
1da177e4 LT |
651 | if (!value) |
652 | value = &dummy; | |
653 | ||
654 | switch (width) { | |
655 | case 8: | |
4be44fcd | 656 | *(u8 *) value = readb(virt_addr); |
1da177e4 LT |
657 | break; |
658 | case 16: | |
4be44fcd | 659 | *(u16 *) value = readw(virt_addr); |
1da177e4 LT |
660 | break; |
661 | case 32: | |
4be44fcd | 662 | *(u32 *) value = readl(virt_addr); |
1da177e4 LT |
663 | break; |
664 | default: | |
665 | BUG(); | |
666 | } | |
667 | ||
620242ae MS |
668 | if (unmap) |
669 | iounmap(virt_addr); | |
1da177e4 LT |
670 | |
671 | return AE_OK; | |
672 | } | |
673 | ||
674 | acpi_status | |
4be44fcd | 675 | acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width) |
1da177e4 | 676 | { |
4be44fcd | 677 | void __iomem *virt_addr; |
620242ae | 678 | int size = width / 8, unmap = 0; |
620242ae | 679 | |
78cdb3ed | 680 | rcu_read_lock(); |
620242ae | 681 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); |
78cdb3ed | 682 | rcu_read_unlock(); |
620242ae MS |
683 | if (!virt_addr) { |
684 | virt_addr = ioremap(phys_addr, size); | |
685 | unmap = 1; | |
686 | } | |
1da177e4 LT |
687 | |
688 | switch (width) { | |
689 | case 8: | |
690 | writeb(value, virt_addr); | |
691 | break; | |
692 | case 16: | |
693 | writew(value, virt_addr); | |
694 | break; | |
695 | case 32: | |
696 | writel(value, virt_addr); | |
697 | break; | |
698 | default: | |
699 | BUG(); | |
700 | } | |
701 | ||
620242ae MS |
702 | if (unmap) |
703 | iounmap(virt_addr); | |
1da177e4 LT |
704 | |
705 | return AE_OK; | |
706 | } | |
707 | ||
1da177e4 | 708 | acpi_status |
4be44fcd | 709 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
c5f0231e | 710 | u64 *value, u32 width) |
1da177e4 LT |
711 | { |
712 | int result, size; | |
c5f0231e | 713 | u32 value32; |
1da177e4 LT |
714 | |
715 | if (!value) | |
716 | return AE_BAD_PARAMETER; | |
717 | ||
718 | switch (width) { | |
719 | case 8: | |
720 | size = 1; | |
721 | break; | |
722 | case 16: | |
723 | size = 2; | |
724 | break; | |
725 | case 32: | |
726 | size = 4; | |
727 | break; | |
728 | default: | |
729 | return AE_ERROR; | |
730 | } | |
731 | ||
b6ce068a MW |
732 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
733 | PCI_DEVFN(pci_id->device, pci_id->function), | |
c5f0231e BM |
734 | reg, size, &value32); |
735 | *value = value32; | |
1da177e4 LT |
736 | |
737 | return (result ? AE_ERROR : AE_OK); | |
738 | } | |
4be44fcd | 739 | |
1da177e4 | 740 | acpi_status |
4be44fcd | 741 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
439913ff | 742 | u64 value, u32 width) |
1da177e4 LT |
743 | { |
744 | int result, size; | |
745 | ||
746 | switch (width) { | |
747 | case 8: | |
748 | size = 1; | |
749 | break; | |
750 | case 16: | |
751 | size = 2; | |
752 | break; | |
753 | case 32: | |
754 | size = 4; | |
755 | break; | |
756 | default: | |
757 | return AE_ERROR; | |
758 | } | |
759 | ||
b6ce068a MW |
760 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
761 | PCI_DEVFN(pci_id->device, pci_id->function), | |
762 | reg, size, value); | |
1da177e4 LT |
763 | |
764 | return (result ? AE_ERROR : AE_OK); | |
765 | } | |
766 | ||
65f27f38 | 767 | static void acpi_os_execute_deferred(struct work_struct *work) |
88db5e14 AS |
768 | { |
769 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
88db5e14 | 770 | |
9ac61856 BH |
771 | if (dpc->wait) |
772 | acpi_os_wait_events_complete(NULL); | |
19cd847a ZR |
773 | |
774 | dpc->function(dpc->context); | |
775 | kfree(dpc); | |
19cd847a ZR |
776 | } |
777 | ||
b8d35192 AS |
778 | /******************************************************************************* |
779 | * | |
780 | * FUNCTION: acpi_os_execute | |
781 | * | |
782 | * PARAMETERS: Type - Type of the callback | |
783 | * Function - Function to be executed | |
784 | * Context - Function parameters | |
785 | * | |
786 | * RETURN: Status | |
787 | * | |
788 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
789 | * immediately executes function on a separate thread. | |
790 | * | |
791 | ******************************************************************************/ | |
792 | ||
19cd847a ZR |
793 | static acpi_status __acpi_os_execute(acpi_execute_type type, |
794 | acpi_osd_exec_callback function, void *context, int hp) | |
1da177e4 | 795 | { |
4be44fcd LB |
796 | acpi_status status = AE_OK; |
797 | struct acpi_os_dpc *dpc; | |
17bc54ee | 798 | struct workqueue_struct *queue; |
19cd847a | 799 | int ret; |
72945b2b LB |
800 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
801 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
802 | function, context)); | |
1da177e4 | 803 | |
1da177e4 LT |
804 | /* |
805 | * Allocate/initialize DPC structure. Note that this memory will be | |
65f27f38 | 806 | * freed by the callee. The kernel handles the work_struct list in a |
1da177e4 LT |
807 | * way that allows us to also free its memory inside the callee. |
808 | * Because we may want to schedule several tasks with different | |
809 | * parameters we can't use the approach some kernel code uses of | |
65f27f38 | 810 | * having a static work_struct. |
1da177e4 | 811 | */ |
72945b2b | 812 | |
65f27f38 | 813 | dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
1da177e4 | 814 | if (!dpc) |
889c78be | 815 | return AE_NO_MEMORY; |
b976fe19 | 816 | |
1da177e4 LT |
817 | dpc->function = function; |
818 | dpc->context = context; | |
b976fe19 | 819 | |
c02256be ZR |
820 | /* |
821 | * We can't run hotplug code in keventd_wq/kacpid_wq/kacpid_notify_wq | |
822 | * because the hotplug code may call driver .remove() functions, | |
823 | * which invoke flush_scheduled_work/acpi_os_wait_events_complete | |
824 | * to flush these workqueues. | |
825 | */ | |
826 | queue = hp ? kacpi_hotplug_wq : | |
827 | (type == OSL_NOTIFY_HANDLER ? kacpi_notify_wq : kacpid_wq); | |
9ac61856 | 828 | dpc->wait = hp ? 1 : 0; |
bc73675b ZR |
829 | |
830 | if (queue == kacpi_hotplug_wq) | |
831 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); | |
832 | else if (queue == kacpi_notify_wq) | |
833 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); | |
834 | else | |
835 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); | |
836 | ||
8fec62b2 TH |
837 | /* |
838 | * On some machines, a software-initiated SMI causes corruption unless | |
839 | * the SMI runs on CPU 0. An SMI can be initiated by any AML, but | |
840 | * typically it's done in GPE-related methods that are run via | |
841 | * workqueues, so we can avoid the known corruption cases by always | |
842 | * queueing on CPU 0. | |
843 | */ | |
844 | ret = queue_work_on(0, queue, &dpc->work); | |
19cd847a ZR |
845 | |
846 | if (!ret) { | |
55ac9a01 LM |
847 | printk(KERN_ERR PREFIX |
848 | "Call to queue_work() failed.\n"); | |
17bc54ee AS |
849 | status = AE_ERROR; |
850 | kfree(dpc); | |
1da177e4 | 851 | } |
889c78be | 852 | return status; |
1da177e4 | 853 | } |
4be44fcd | 854 | |
19cd847a ZR |
855 | acpi_status acpi_os_execute(acpi_execute_type type, |
856 | acpi_osd_exec_callback function, void *context) | |
857 | { | |
858 | return __acpi_os_execute(type, function, context, 0); | |
859 | } | |
b8d35192 | 860 | EXPORT_SYMBOL(acpi_os_execute); |
1da177e4 | 861 | |
19cd847a ZR |
862 | acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function, |
863 | void *context) | |
864 | { | |
865 | return __acpi_os_execute(0, function, context, 1); | |
866 | } | |
867 | ||
4be44fcd | 868 | void acpi_os_wait_events_complete(void *context) |
1da177e4 LT |
869 | { |
870 | flush_workqueue(kacpid_wq); | |
2f67a069 | 871 | flush_workqueue(kacpi_notify_wq); |
1da177e4 | 872 | } |
4be44fcd | 873 | |
1da177e4 LT |
874 | EXPORT_SYMBOL(acpi_os_wait_events_complete); |
875 | ||
1da177e4 LT |
876 | /* |
877 | * Deallocate the memory for a spinlock. | |
878 | */ | |
967440e3 | 879 | void acpi_os_delete_lock(acpi_spinlock handle) |
1da177e4 | 880 | { |
d550d98d | 881 | return; |
1da177e4 LT |
882 | } |
883 | ||
1da177e4 | 884 | acpi_status |
4be44fcd | 885 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 886 | { |
4be44fcd | 887 | struct semaphore *sem = NULL; |
1da177e4 | 888 | |
1da177e4 LT |
889 | sem = acpi_os_allocate(sizeof(struct semaphore)); |
890 | if (!sem) | |
d550d98d | 891 | return AE_NO_MEMORY; |
1da177e4 LT |
892 | memset(sem, 0, sizeof(struct semaphore)); |
893 | ||
894 | sema_init(sem, initial_units); | |
895 | ||
4be44fcd | 896 | *handle = (acpi_handle *) sem; |
1da177e4 | 897 | |
4be44fcd LB |
898 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
899 | *handle, initial_units)); | |
1da177e4 | 900 | |
d550d98d | 901 | return AE_OK; |
1da177e4 | 902 | } |
1da177e4 | 903 | |
1da177e4 LT |
904 | /* |
905 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
906 | * 'delete_semaphore()' function -- may result in an invalid | |
907 | * pointer dereference for non-synchronized consumers. Should | |
908 | * we at least check for blocked threads and signal/cancel them? | |
909 | */ | |
910 | ||
4be44fcd | 911 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 912 | { |
4be44fcd | 913 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 914 | |
1da177e4 | 915 | if (!sem) |
d550d98d | 916 | return AE_BAD_PARAMETER; |
1da177e4 | 917 | |
4be44fcd | 918 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 919 | |
f1241c87 | 920 | BUG_ON(!list_empty(&sem->wait_list)); |
02438d87 | 921 | kfree(sem); |
4be44fcd | 922 | sem = NULL; |
1da177e4 | 923 | |
d550d98d | 924 | return AE_OK; |
1da177e4 | 925 | } |
1da177e4 | 926 | |
1da177e4 | 927 | /* |
1da177e4 LT |
928 | * TODO: Support for units > 1? |
929 | */ | |
4be44fcd | 930 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 931 | { |
4be44fcd LB |
932 | acpi_status status = AE_OK; |
933 | struct semaphore *sem = (struct semaphore *)handle; | |
f1241c87 | 934 | long jiffies; |
4be44fcd | 935 | int ret = 0; |
1da177e4 | 936 | |
1da177e4 | 937 | if (!sem || (units < 1)) |
d550d98d | 938 | return AE_BAD_PARAMETER; |
1da177e4 LT |
939 | |
940 | if (units > 1) | |
d550d98d | 941 | return AE_SUPPORT; |
1da177e4 | 942 | |
4be44fcd LB |
943 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
944 | handle, units, timeout)); | |
1da177e4 | 945 | |
f1241c87 MW |
946 | if (timeout == ACPI_WAIT_FOREVER) |
947 | jiffies = MAX_SCHEDULE_TIMEOUT; | |
948 | else | |
949 | jiffies = msecs_to_jiffies(timeout); | |
950 | ||
951 | ret = down_timeout(sem, jiffies); | |
952 | if (ret) | |
953 | status = AE_TIME; | |
1da177e4 LT |
954 | |
955 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 956 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 957 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
958 | handle, units, timeout, |
959 | acpi_format_exception(status))); | |
960 | } else { | |
961 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 962 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 963 | units, timeout)); |
1da177e4 LT |
964 | } |
965 | ||
d550d98d | 966 | return status; |
1da177e4 | 967 | } |
1da177e4 | 968 | |
1da177e4 LT |
969 | /* |
970 | * TODO: Support for units > 1? | |
971 | */ | |
4be44fcd | 972 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 973 | { |
4be44fcd | 974 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 975 | |
1da177e4 | 976 | if (!sem || (units < 1)) |
d550d98d | 977 | return AE_BAD_PARAMETER; |
1da177e4 LT |
978 | |
979 | if (units > 1) | |
d550d98d | 980 | return AE_SUPPORT; |
1da177e4 | 981 | |
4be44fcd LB |
982 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
983 | units)); | |
1da177e4 LT |
984 | |
985 | up(sem); | |
986 | ||
d550d98d | 987 | return AE_OK; |
1da177e4 | 988 | } |
4be44fcd | 989 | |
1da177e4 | 990 | #ifdef ACPI_FUTURE_USAGE |
4be44fcd | 991 | u32 acpi_os_get_line(char *buffer) |
1da177e4 LT |
992 | { |
993 | ||
994 | #ifdef ENABLE_DEBUGGER | |
995 | if (acpi_in_debugger) { | |
996 | u32 chars; | |
997 | ||
998 | kdb_read(buffer, sizeof(line_buf)); | |
999 | ||
1000 | /* remove the CR kdb includes */ | |
1001 | chars = strlen(buffer) - 1; | |
1002 | buffer[chars] = '\0'; | |
1003 | } | |
1004 | #endif | |
1005 | ||
1006 | return 0; | |
1007 | } | |
4be44fcd | 1008 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 | 1009 | |
4be44fcd | 1010 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 1011 | { |
4be44fcd | 1012 | switch (function) { |
1da177e4 LT |
1013 | case ACPI_SIGNAL_FATAL: |
1014 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
1015 | break; | |
1016 | case ACPI_SIGNAL_BREAKPOINT: | |
1017 | /* | |
1018 | * AML Breakpoint | |
1019 | * ACPI spec. says to treat it as a NOP unless | |
1020 | * you are debugging. So if/when we integrate | |
1021 | * AML debugger into the kernel debugger its | |
1022 | * hook will go here. But until then it is | |
1023 | * not useful to print anything on breakpoints. | |
1024 | */ | |
1025 | break; | |
1026 | default: | |
1027 | break; | |
1028 | } | |
1029 | ||
1030 | return AE_OK; | |
1031 | } | |
4be44fcd | 1032 | |
4be44fcd | 1033 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
1034 | { |
1035 | char *p = acpi_os_name; | |
4be44fcd | 1036 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
1037 | |
1038 | if (!str || !*str) | |
1039 | return 0; | |
1040 | ||
1041 | for (; count-- && str && *str; str++) { | |
1042 | if (isalnum(*str) || *str == ' ' || *str == ':') | |
1043 | *p++ = *str; | |
1044 | else if (*str == '\'' || *str == '"') | |
1045 | continue; | |
1046 | else | |
1047 | break; | |
1048 | } | |
1049 | *p = 0; | |
1050 | ||
1051 | return 1; | |
4be44fcd | 1052 | |
1da177e4 LT |
1053 | } |
1054 | ||
1055 | __setup("acpi_os_name=", acpi_os_name_setup); | |
1056 | ||
d90aa92c LM |
1057 | void __init acpi_osi_setup(char *str) |
1058 | { | |
1059 | if (!acpi_gbl_create_osi_method) | |
1060 | return; | |
1061 | ||
1062 | if (str == NULL || *str == '\0') { | |
1063 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
1064 | acpi_gbl_create_osi_method = FALSE; | |
1065 | } else | |
1066 | strncpy(osi_setup_string, str, OSI_STRING_LENGTH_MAX); | |
1067 | } | |
1068 | ||
d4b7dc49 LB |
1069 | static void __init set_osi_linux(unsigned int enable) |
1070 | { | |
d90aa92c | 1071 | if (osi_linux.enable != enable) |
d4b7dc49 | 1072 | osi_linux.enable = enable; |
b0ed7a91 LM |
1073 | |
1074 | if (osi_linux.enable) | |
1075 | acpi_osi_setup("Linux"); | |
1076 | else | |
1077 | acpi_osi_setup("!Linux"); | |
1078 | ||
d4b7dc49 LB |
1079 | return; |
1080 | } | |
1081 | ||
1082 | static void __init acpi_cmdline_osi_linux(unsigned int enable) | |
1083 | { | |
d90aa92c LM |
1084 | osi_linux.cmdline = 1; /* cmdline set the default and override DMI */ |
1085 | osi_linux.dmi = 0; | |
d4b7dc49 LB |
1086 | set_osi_linux(enable); |
1087 | ||
1088 | return; | |
1089 | } | |
1090 | ||
1091 | void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) | |
1092 | { | |
d4b7dc49 LB |
1093 | printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); |
1094 | ||
1095 | if (enable == -1) | |
1096 | return; | |
1097 | ||
d90aa92c | 1098 | osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */ |
d4b7dc49 | 1099 | set_osi_linux(enable); |
f507654d | 1100 | |
f507654d LB |
1101 | return; |
1102 | } | |
1103 | ||
1da177e4 | 1104 | /* |
ae00d812 LB |
1105 | * Modify the list of "OS Interfaces" reported to BIOS via _OSI |
1106 | * | |
1da177e4 | 1107 | * empty string disables _OSI |
ae00d812 LB |
1108 | * string starting with '!' disables that string |
1109 | * otherwise string is added to list, augmenting built-in strings | |
1da177e4 | 1110 | */ |
b0ed7a91 | 1111 | static void __init acpi_osi_setup_late(void) |
1da177e4 | 1112 | { |
b0ed7a91 | 1113 | char *str = osi_setup_string; |
d90aa92c | 1114 | acpi_status status; |
b0ed7a91 LM |
1115 | |
1116 | if (*str == '\0') | |
1117 | return; | |
1118 | ||
d90aa92c LM |
1119 | if (*str == '!') { |
1120 | status = acpi_remove_interface(++str); | |
1121 | ||
1122 | if (ACPI_SUCCESS(status)) | |
ae00d812 | 1123 | printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); |
b0ed7a91 | 1124 | } else { |
d90aa92c LM |
1125 | status = acpi_install_interface(str); |
1126 | ||
1127 | if (ACPI_SUCCESS(status)) | |
b0ed7a91 LM |
1128 | printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); |
1129 | } | |
1130 | } | |
1131 | ||
d90aa92c | 1132 | static int __init osi_setup(char *str) |
b0ed7a91 | 1133 | { |
d90aa92c LM |
1134 | if (str && !strcmp("Linux", str)) |
1135 | acpi_cmdline_osi_linux(1); | |
1136 | else if (str && !strcmp("!Linux", str)) | |
1137 | acpi_cmdline_osi_linux(0); | |
1138 | else | |
1139 | acpi_osi_setup(str); | |
1da177e4 LT |
1140 | |
1141 | return 1; | |
1142 | } | |
1143 | ||
d90aa92c | 1144 | __setup("acpi_osi=", osi_setup); |
1da177e4 LT |
1145 | |
1146 | /* enable serialization to combat AE_ALREADY_EXISTS errors */ | |
4be44fcd | 1147 | static int __init acpi_serialize_setup(char *str) |
1da177e4 LT |
1148 | { |
1149 | printk(KERN_INFO PREFIX "serialize enabled\n"); | |
1150 | ||
1151 | acpi_gbl_all_methods_serialized = TRUE; | |
1152 | ||
1153 | return 1; | |
1154 | } | |
1155 | ||
1156 | __setup("acpi_serialize", acpi_serialize_setup); | |
1157 | ||
df92e695 TR |
1158 | /* Check of resource interference between native drivers and ACPI |
1159 | * OperationRegions (SystemIO and System Memory only). | |
1160 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem | |
1161 | * in arbitrary AML code and can interfere with legacy drivers. | |
1162 | * acpi_enforce_resources= can be set to: | |
1163 | * | |
7e90560c | 1164 | * - strict (default) (2) |
df92e695 | 1165 | * -> further driver trying to access the resources will not load |
7e90560c | 1166 | * - lax (1) |
df92e695 TR |
1167 | * -> further driver trying to access the resources will load, but you |
1168 | * get a system message that something might go wrong... | |
1169 | * | |
1170 | * - no (0) | |
1171 | * -> ACPI Operation Region resources will not be registered | |
1172 | * | |
1173 | */ | |
1174 | #define ENFORCE_RESOURCES_STRICT 2 | |
1175 | #define ENFORCE_RESOURCES_LAX 1 | |
1176 | #define ENFORCE_RESOURCES_NO 0 | |
1177 | ||
7e90560c | 1178 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
df92e695 TR |
1179 | |
1180 | static int __init acpi_enforce_resources_setup(char *str) | |
1181 | { | |
1182 | if (str == NULL || *str == '\0') | |
1183 | return 0; | |
1184 | ||
1185 | if (!strcmp("strict", str)) | |
1186 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; | |
1187 | else if (!strcmp("lax", str)) | |
1188 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1189 | else if (!strcmp("no", str)) | |
1190 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; | |
1191 | ||
1192 | return 1; | |
1193 | } | |
1194 | ||
1195 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); | |
1196 | ||
1197 | /* Check for resource conflicts between ACPI OperationRegions and native | |
1198 | * drivers */ | |
876fba43 | 1199 | int acpi_check_resource_conflict(const struct resource *res) |
df92e695 TR |
1200 | { |
1201 | struct acpi_res_list *res_list_elem; | |
1202 | int ioport; | |
1203 | int clash = 0; | |
1204 | ||
1205 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1206 | return 0; | |
1207 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) | |
1208 | return 0; | |
1209 | ||
1210 | ioport = res->flags & IORESOURCE_IO; | |
1211 | ||
1212 | spin_lock(&acpi_res_lock); | |
1213 | list_for_each_entry(res_list_elem, &resource_list_head, | |
1214 | resource_list) { | |
1215 | if (ioport && (res_list_elem->resource_type | |
1216 | != ACPI_ADR_SPACE_SYSTEM_IO)) | |
1217 | continue; | |
1218 | if (!ioport && (res_list_elem->resource_type | |
1219 | != ACPI_ADR_SPACE_SYSTEM_MEMORY)) | |
1220 | continue; | |
1221 | ||
1222 | if (res->end < res_list_elem->start | |
1223 | || res_list_elem->end < res->start) | |
1224 | continue; | |
1225 | clash = 1; | |
1226 | break; | |
1227 | } | |
1228 | spin_unlock(&acpi_res_lock); | |
1229 | ||
1230 | if (clash) { | |
1231 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { | |
1638bca8 CD |
1232 | printk(KERN_WARNING "ACPI: resource %s %pR" |
1233 | " conflicts with ACPI region %s %pR\n", | |
1234 | res->name, res, res_list_elem->name, | |
1235 | res_list_elem); | |
14f03343 JD |
1236 | if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) |
1237 | printk(KERN_NOTICE "ACPI: This conflict may" | |
1238 | " cause random problems and system" | |
1239 | " instability\n"); | |
1240 | printk(KERN_INFO "ACPI: If an ACPI driver is available" | |
1241 | " for this device, you should use it instead of" | |
1242 | " the native driver\n"); | |
df92e695 TR |
1243 | } |
1244 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) | |
1245 | return -EBUSY; | |
1246 | } | |
1247 | return 0; | |
1248 | } | |
443dea72 | 1249 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
df92e695 TR |
1250 | |
1251 | int acpi_check_region(resource_size_t start, resource_size_t n, | |
1252 | const char *name) | |
1253 | { | |
1254 | struct resource res = { | |
1255 | .start = start, | |
1256 | .end = start + n - 1, | |
1257 | .name = name, | |
1258 | .flags = IORESOURCE_IO, | |
1259 | }; | |
1260 | ||
1261 | return acpi_check_resource_conflict(&res); | |
1262 | } | |
1263 | EXPORT_SYMBOL(acpi_check_region); | |
1264 | ||
70dd6bea JD |
1265 | /* |
1266 | * Let drivers know whether the resource checks are effective | |
1267 | */ | |
1268 | int acpi_resources_are_enforced(void) | |
1269 | { | |
1270 | return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; | |
1271 | } | |
1272 | EXPORT_SYMBOL(acpi_resources_are_enforced); | |
1273 | ||
73459f73 RM |
1274 | /* |
1275 | * Acquire a spinlock. | |
1276 | * | |
1277 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1278 | */ |
1279 | ||
967440e3 | 1280 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 1281 | { |
b8e4d893 | 1282 | acpi_cpu_flags flags; |
967440e3 | 1283 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
1284 | return flags; |
1285 | } | |
1286 | ||
1287 | /* | |
1288 | * Release a spinlock. See above. | |
1289 | */ | |
1290 | ||
967440e3 | 1291 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 1292 | { |
967440e3 | 1293 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
1294 | } |
1295 | ||
73459f73 RM |
1296 | #ifndef ACPI_USE_LOCAL_CACHE |
1297 | ||
1298 | /******************************************************************************* | |
1299 | * | |
1300 | * FUNCTION: acpi_os_create_cache | |
1301 | * | |
b229cf92 BM |
1302 | * PARAMETERS: name - Ascii name for the cache |
1303 | * size - Size of each cached object | |
1304 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1305 | * cache - Where the new cache object is returned | |
73459f73 | 1306 | * |
b229cf92 | 1307 | * RETURN: status |
73459f73 RM |
1308 | * |
1309 | * DESCRIPTION: Create a cache object | |
1310 | * | |
1311 | ******************************************************************************/ | |
1312 | ||
1313 | acpi_status | |
4be44fcd | 1314 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1315 | { |
20c2df83 | 1316 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
a6fdbf90 | 1317 | if (*cache == NULL) |
b229cf92 BM |
1318 | return AE_ERROR; |
1319 | else | |
1320 | return AE_OK; | |
73459f73 RM |
1321 | } |
1322 | ||
1323 | /******************************************************************************* | |
1324 | * | |
1325 | * FUNCTION: acpi_os_purge_cache | |
1326 | * | |
1327 | * PARAMETERS: Cache - Handle to cache object | |
1328 | * | |
1329 | * RETURN: Status | |
1330 | * | |
1331 | * DESCRIPTION: Free all objects within the requested cache. | |
1332 | * | |
1333 | ******************************************************************************/ | |
1334 | ||
4be44fcd | 1335 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1336 | { |
50dd0969 | 1337 | kmem_cache_shrink(cache); |
4be44fcd | 1338 | return (AE_OK); |
73459f73 RM |
1339 | } |
1340 | ||
1341 | /******************************************************************************* | |
1342 | * | |
1343 | * FUNCTION: acpi_os_delete_cache | |
1344 | * | |
1345 | * PARAMETERS: Cache - Handle to cache object | |
1346 | * | |
1347 | * RETURN: Status | |
1348 | * | |
1349 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1350 | * cache object. | |
1351 | * | |
1352 | ******************************************************************************/ | |
1353 | ||
4be44fcd | 1354 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1355 | { |
1a1d92c1 | 1356 | kmem_cache_destroy(cache); |
4be44fcd | 1357 | return (AE_OK); |
73459f73 RM |
1358 | } |
1359 | ||
1360 | /******************************************************************************* | |
1361 | * | |
1362 | * FUNCTION: acpi_os_release_object | |
1363 | * | |
1364 | * PARAMETERS: Cache - Handle to cache object | |
1365 | * Object - The object to be released | |
1366 | * | |
1367 | * RETURN: None | |
1368 | * | |
1369 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1370 | * the object is deleted. | |
1371 | * | |
1372 | ******************************************************************************/ | |
1373 | ||
4be44fcd | 1374 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1375 | { |
4be44fcd LB |
1376 | kmem_cache_free(cache, object); |
1377 | return (AE_OK); | |
73459f73 RM |
1378 | } |
1379 | ||
a5fe1a03 LM |
1380 | static inline int acpi_res_list_add(struct acpi_res_list *res) |
1381 | { | |
1382 | struct acpi_res_list *res_list_elem; | |
1383 | ||
1384 | list_for_each_entry(res_list_elem, &resource_list_head, | |
1385 | resource_list) { | |
1386 | ||
1387 | if (res->resource_type == res_list_elem->resource_type && | |
1388 | res->start == res_list_elem->start && | |
1389 | res->end == res_list_elem->end) { | |
1390 | ||
1391 | /* | |
1392 | * The Region(addr,len) already exist in the list, | |
1393 | * just increase the count | |
1394 | */ | |
1395 | ||
1396 | res_list_elem->count++; | |
1397 | return 0; | |
1398 | } | |
1399 | } | |
1400 | ||
1401 | res->count = 1; | |
1402 | list_add(&res->resource_list, &resource_list_head); | |
1403 | return 1; | |
1404 | } | |
1405 | ||
1406 | static inline void acpi_res_list_del(struct acpi_res_list *res) | |
1407 | { | |
1408 | struct acpi_res_list *res_list_elem; | |
1409 | ||
1410 | list_for_each_entry(res_list_elem, &resource_list_head, | |
1411 | resource_list) { | |
1412 | ||
1413 | if (res->resource_type == res_list_elem->resource_type && | |
1414 | res->start == res_list_elem->start && | |
1415 | res->end == res_list_elem->end) { | |
1416 | ||
1417 | /* | |
1418 | * If the res count is decreased to 0, | |
1419 | * remove and free it | |
1420 | */ | |
1421 | ||
1422 | if (--res_list_elem->count == 0) { | |
1423 | list_del(&res_list_elem->resource_list); | |
1424 | kfree(res_list_elem); | |
1425 | } | |
1426 | return; | |
1427 | } | |
1428 | } | |
1429 | } | |
1430 | ||
1431 | acpi_status | |
1432 | acpi_os_invalidate_address( | |
1433 | u8 space_id, | |
1434 | acpi_physical_address address, | |
1435 | acpi_size length) | |
1436 | { | |
1437 | struct acpi_res_list res; | |
1438 | ||
1439 | switch (space_id) { | |
1440 | case ACPI_ADR_SPACE_SYSTEM_IO: | |
1441 | case ACPI_ADR_SPACE_SYSTEM_MEMORY: | |
88393161 | 1442 | /* Only interference checks against SystemIO and SystemMemory |
a5fe1a03 LM |
1443 | are needed */ |
1444 | res.start = address; | |
1445 | res.end = address + length - 1; | |
1446 | res.resource_type = space_id; | |
1447 | spin_lock(&acpi_res_lock); | |
1448 | acpi_res_list_del(&res); | |
1449 | spin_unlock(&acpi_res_lock); | |
1450 | break; | |
1451 | case ACPI_ADR_SPACE_PCI_CONFIG: | |
1452 | case ACPI_ADR_SPACE_EC: | |
1453 | case ACPI_ADR_SPACE_SMBUS: | |
1454 | case ACPI_ADR_SPACE_CMOS: | |
1455 | case ACPI_ADR_SPACE_PCI_BAR_TARGET: | |
1456 | case ACPI_ADR_SPACE_DATA_TABLE: | |
1457 | case ACPI_ADR_SPACE_FIXED_HARDWARE: | |
1458 | break; | |
1459 | } | |
1460 | return AE_OK; | |
1461 | } | |
1462 | ||
b229cf92 BM |
1463 | /****************************************************************************** |
1464 | * | |
1465 | * FUNCTION: acpi_os_validate_address | |
1466 | * | |
1467 | * PARAMETERS: space_id - ACPI space ID | |
1468 | * address - Physical address | |
1469 | * length - Address length | |
1470 | * | |
1471 | * RETURN: AE_OK if address/length is valid for the space_id. Otherwise, | |
1472 | * should return AE_AML_ILLEGAL_ADDRESS. | |
1473 | * | |
1474 | * DESCRIPTION: Validate a system address via the host OS. Used to validate | |
1475 | * the addresses accessed by AML operation regions. | |
1476 | * | |
1477 | *****************************************************************************/ | |
1478 | ||
1479 | acpi_status | |
1480 | acpi_os_validate_address ( | |
1481 | u8 space_id, | |
1482 | acpi_physical_address address, | |
df92e695 TR |
1483 | acpi_size length, |
1484 | char *name) | |
b229cf92 | 1485 | { |
df92e695 | 1486 | struct acpi_res_list *res; |
a5fe1a03 | 1487 | int added; |
df92e695 TR |
1488 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) |
1489 | return AE_OK; | |
b229cf92 | 1490 | |
df92e695 TR |
1491 | switch (space_id) { |
1492 | case ACPI_ADR_SPACE_SYSTEM_IO: | |
1493 | case ACPI_ADR_SPACE_SYSTEM_MEMORY: | |
88393161 | 1494 | /* Only interference checks against SystemIO and SystemMemory |
df92e695 TR |
1495 | are needed */ |
1496 | res = kzalloc(sizeof(struct acpi_res_list), GFP_KERNEL); | |
1497 | if (!res) | |
1498 | return AE_OK; | |
1499 | /* ACPI names are fixed to 4 bytes, still better use strlcpy */ | |
1500 | strlcpy(res->name, name, 5); | |
1501 | res->start = address; | |
1502 | res->end = address + length - 1; | |
1503 | res->resource_type = space_id; | |
1504 | spin_lock(&acpi_res_lock); | |
a5fe1a03 | 1505 | added = acpi_res_list_add(res); |
df92e695 | 1506 | spin_unlock(&acpi_res_lock); |
a5fe1a03 LM |
1507 | pr_debug("%s %s resource: start: 0x%llx, end: 0x%llx, " |
1508 | "name: %s\n", added ? "Added" : "Already exist", | |
1509 | (space_id == ACPI_ADR_SPACE_SYSTEM_IO) | |
df92e695 TR |
1510 | ? "SystemIO" : "System Memory", |
1511 | (unsigned long long)res->start, | |
1512 | (unsigned long long)res->end, | |
1513 | res->name); | |
a5fe1a03 LM |
1514 | if (!added) |
1515 | kfree(res); | |
df92e695 TR |
1516 | break; |
1517 | case ACPI_ADR_SPACE_PCI_CONFIG: | |
1518 | case ACPI_ADR_SPACE_EC: | |
1519 | case ACPI_ADR_SPACE_SMBUS: | |
1520 | case ACPI_ADR_SPACE_CMOS: | |
1521 | case ACPI_ADR_SPACE_PCI_BAR_TARGET: | |
1522 | case ACPI_ADR_SPACE_DATA_TABLE: | |
1523 | case ACPI_ADR_SPACE_FIXED_HARDWARE: | |
1524 | break; | |
1525 | } | |
1526 | return AE_OK; | |
b229cf92 | 1527 | } |
73459f73 | 1528 | #endif |
d362edaf MS |
1529 | |
1530 | acpi_status __init acpi_os_initialize(void) | |
1531 | { | |
1532 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
1533 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1534 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1535 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
1536 | ||
1537 | return AE_OK; | |
1538 | } | |
1539 | ||
1540 | acpi_status acpi_os_initialize1(void) | |
1541 | { | |
1542 | kacpid_wq = create_workqueue("kacpid"); | |
1543 | kacpi_notify_wq = create_workqueue("kacpi_notify"); | |
1544 | kacpi_hotplug_wq = create_workqueue("kacpi_hotplug"); | |
1545 | BUG_ON(!kacpid_wq); | |
1546 | BUG_ON(!kacpi_notify_wq); | |
1547 | BUG_ON(!kacpi_hotplug_wq); | |
1bd64d42 LB |
1548 | acpi_install_interface_handler(acpi_osi_handler); |
1549 | acpi_osi_setup_late(); | |
d362edaf MS |
1550 | return AE_OK; |
1551 | } | |
1552 | ||
1553 | acpi_status acpi_os_terminate(void) | |
1554 | { | |
1555 | if (acpi_irq_handler) { | |
1556 | acpi_os_remove_interrupt_handler(acpi_irq_irq, | |
1557 | acpi_irq_handler); | |
1558 | } | |
1559 | ||
1560 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
1561 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1562 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1563 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
1564 | ||
1565 | destroy_workqueue(kacpid_wq); | |
1566 | destroy_workqueue(kacpi_notify_wq); | |
1567 | destroy_workqueue(kacpi_hotplug_wq); | |
1568 | ||
1569 | return AE_OK; | |
1570 | } |