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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> |
2d6d9fd3 | 41 | #include <linux/acpi_io.h> |
1da177e4 | 42 | #include <linux/efi.h> |
df92e695 TR |
43 | #include <linux/ioport.h> |
44 | #include <linux/list.h> | |
f1241c87 MW |
45 | #include <linux/jiffies.h> |
46 | #include <linux/semaphore.h> | |
47 | ||
48 | #include <asm/io.h> | |
49 | #include <asm/uaccess.h> | |
50 | ||
51 | #include <acpi/acpi.h> | |
52 | #include <acpi/acpi_bus.h> | |
53 | #include <acpi/processor.h> | |
1da177e4 | 54 | |
1da177e4 | 55 | #define _COMPONENT ACPI_OS_SERVICES |
f52fd66d | 56 | ACPI_MODULE_NAME("osl"); |
1da177e4 | 57 | #define PREFIX "ACPI: " |
4be44fcd LB |
58 | struct acpi_os_dpc { |
59 | acpi_osd_exec_callback function; | |
60 | void *context; | |
65f27f38 | 61 | struct work_struct work; |
9ac61856 | 62 | int wait; |
1da177e4 LT |
63 | }; |
64 | ||
65 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
66 | #include CONFIG_ACPI_CUSTOM_DSDT_FILE | |
67 | #endif | |
68 | ||
69 | #ifdef ENABLE_DEBUGGER | |
70 | #include <linux/kdb.h> | |
71 | ||
72 | /* stuff for debugger support */ | |
73 | int acpi_in_debugger; | |
74 | EXPORT_SYMBOL(acpi_in_debugger); | |
75 | ||
76 | extern char line_buf[80]; | |
4be44fcd | 77 | #endif /*ENABLE_DEBUGGER */ |
1da177e4 | 78 | |
1da177e4 LT |
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; | |
b7c1fadd | 107 | unsigned long refcount; |
620242ae MS |
108 | }; |
109 | ||
110 | static LIST_HEAD(acpi_ioremaps); | |
7bbb8903 | 111 | static DEFINE_MUTEX(acpi_ioremap_lock); |
620242ae | 112 | |
b0ed7a91 | 113 | static void __init acpi_osi_setup_late(void); |
ae00d812 | 114 | |
d4b7dc49 | 115 | /* |
a6e0887f | 116 | * The story of _OSI(Linux) |
d4b7dc49 | 117 | * |
a6e0887f LB |
118 | * From pre-history through Linux-2.6.22, |
119 | * Linux responded TRUE upon a BIOS OSI(Linux) query. | |
d4b7dc49 | 120 | * |
a6e0887f LB |
121 | * Unfortunately, reference BIOS writers got wind of this |
122 | * and put OSI(Linux) in their example code, quickly exposing | |
123 | * this string as ill-conceived and opening the door to | |
124 | * an un-bounded number of BIOS incompatibilities. | |
d4b7dc49 | 125 | * |
a6e0887f LB |
126 | * For example, OSI(Linux) was used on resume to re-POST a |
127 | * video card on one system, because Linux at that time | |
128 | * could not do a speedy restore in its native driver. | |
129 | * But then upon gaining quick native restore capability, | |
130 | * Linux has no way to tell the BIOS to skip the time-consuming | |
131 | * POST -- putting Linux at a permanent performance disadvantage. | |
132 | * On another system, the BIOS writer used OSI(Linux) | |
133 | * to infer native OS support for IPMI! On other systems, | |
134 | * OSI(Linux) simply got in the way of Linux claiming to | |
135 | * be compatible with other operating systems, exposing | |
136 | * BIOS issues such as skipped device initialization. | |
d4b7dc49 | 137 | * |
a6e0887f LB |
138 | * So "Linux" turned out to be a really poor chose of |
139 | * OSI string, and from Linux-2.6.23 onward we respond FALSE. | |
d4b7dc49 LB |
140 | * |
141 | * BIOS writers should NOT query _OSI(Linux) on future systems. | |
a6e0887f LB |
142 | * Linux will complain on the console when it sees it, and return FALSE. |
143 | * To get Linux to return TRUE for your system will require | |
144 | * a kernel source update to add a DMI entry, | |
145 | * or boot with "acpi_osi=Linux" | |
d4b7dc49 | 146 | */ |
d4b7dc49 | 147 | |
1d15d84e | 148 | static struct osi_linux { |
d4b7dc49 LB |
149 | unsigned int enable:1; |
150 | unsigned int dmi:1; | |
151 | unsigned int cmdline:1; | |
d90aa92c | 152 | } osi_linux = {0, 0, 0}; |
f507654d | 153 | |
b0ed7a91 LM |
154 | static u32 acpi_osi_handler(acpi_string interface, u32 supported) |
155 | { | |
156 | if (!strcmp("Linux", interface)) { | |
157 | ||
8997621b | 158 | printk_once(KERN_NOTICE FW_BUG PREFIX |
b0ed7a91 LM |
159 | "BIOS _OSI(Linux) query %s%s\n", |
160 | osi_linux.enable ? "honored" : "ignored", | |
161 | osi_linux.cmdline ? " via cmdline" : | |
162 | osi_linux.dmi ? " via DMI" : ""); | |
163 | } | |
164 | ||
165 | return supported; | |
166 | } | |
167 | ||
9a47cdb1 BH |
168 | static void __init acpi_request_region (struct acpi_generic_address *addr, |
169 | unsigned int length, char *desc) | |
170 | { | |
9a47cdb1 BH |
171 | if (!addr->address || !length) |
172 | return; | |
173 | ||
cfa806f0 | 174 | /* Resources are never freed */ |
eee3c859 | 175 | if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_IO) |
cfa806f0 | 176 | request_region(addr->address, length, desc); |
eee3c859 | 177 | else if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) |
cfa806f0 | 178 | request_mem_region(addr->address, length, desc); |
9a47cdb1 BH |
179 | } |
180 | ||
181 | static int __init acpi_reserve_resources(void) | |
182 | { | |
eee3c859 | 183 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
184 | "ACPI PM1a_EVT_BLK"); |
185 | ||
eee3c859 | 186 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
187 | "ACPI PM1b_EVT_BLK"); |
188 | ||
eee3c859 | 189 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
190 | "ACPI PM1a_CNT_BLK"); |
191 | ||
eee3c859 | 192 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
193 | "ACPI PM1b_CNT_BLK"); |
194 | ||
eee3c859 LB |
195 | if (acpi_gbl_FADT.pm_timer_length == 4) |
196 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); | |
9a47cdb1 | 197 | |
eee3c859 | 198 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
9a47cdb1 BH |
199 | "ACPI PM2_CNT_BLK"); |
200 | ||
201 | /* Length of GPE blocks must be a non-negative multiple of 2 */ | |
202 | ||
eee3c859 LB |
203 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
204 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, | |
205 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); | |
9a47cdb1 | 206 | |
eee3c859 LB |
207 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
208 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, | |
209 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); | |
9a47cdb1 BH |
210 | |
211 | return 0; | |
212 | } | |
213 | device_initcall(acpi_reserve_resources); | |
214 | ||
4be44fcd | 215 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
216 | { |
217 | va_list args; | |
218 | va_start(args, fmt); | |
219 | acpi_os_vprintf(fmt, args); | |
220 | va_end(args); | |
221 | } | |
4be44fcd | 222 | |
4be44fcd | 223 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
224 | { |
225 | static char buffer[512]; | |
4be44fcd | 226 | |
1da177e4 LT |
227 | vsprintf(buffer, fmt, args); |
228 | ||
229 | #ifdef ENABLE_DEBUGGER | |
230 | if (acpi_in_debugger) { | |
231 | kdb_printf("%s", buffer); | |
232 | } else { | |
4d939155 | 233 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
234 | } |
235 | #else | |
4d939155 | 236 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
237 | #endif |
238 | } | |
239 | ||
4996c023 TI |
240 | #ifdef CONFIG_KEXEC |
241 | static unsigned long acpi_rsdp; | |
242 | static int __init setup_acpi_rsdp(char *arg) | |
243 | { | |
244 | acpi_rsdp = simple_strtoul(arg, NULL, 16); | |
245 | return 0; | |
246 | } | |
247 | early_param("acpi_rsdp", setup_acpi_rsdp); | |
248 | #endif | |
249 | ||
ad71860a | 250 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
1da177e4 | 251 | { |
4996c023 TI |
252 | #ifdef CONFIG_KEXEC |
253 | if (acpi_rsdp) | |
254 | return acpi_rsdp; | |
255 | #endif | |
256 | ||
1da177e4 | 257 | if (efi_enabled) { |
b2c99e3c | 258 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
ad71860a | 259 | return efi.acpi20; |
b2c99e3c | 260 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
ad71860a | 261 | return efi.acpi; |
1da177e4 | 262 | else { |
4be44fcd LB |
263 | printk(KERN_ERR PREFIX |
264 | "System description tables not found\n"); | |
ad71860a | 265 | return 0; |
1da177e4 | 266 | } |
239665a3 LB |
267 | } else { |
268 | acpi_physical_address pa = 0; | |
269 | ||
270 | acpi_find_root_pointer(&pa); | |
271 | return pa; | |
272 | } | |
1da177e4 LT |
273 | } |
274 | ||
78cdb3ed | 275 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
4a3cba5e MS |
276 | static struct acpi_ioremap * |
277 | acpi_map_lookup(acpi_physical_address phys, acpi_size size) | |
620242ae MS |
278 | { |
279 | struct acpi_ioremap *map; | |
280 | ||
78cdb3ed | 281 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
620242ae MS |
282 | if (map->phys <= phys && |
283 | phys + size <= map->phys + map->size) | |
4a3cba5e MS |
284 | return map; |
285 | ||
286 | return NULL; | |
287 | } | |
288 | ||
289 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ | |
290 | static void __iomem * | |
291 | acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size) | |
292 | { | |
293 | struct acpi_ioremap *map; | |
294 | ||
295 | map = acpi_map_lookup(phys, size); | |
296 | if (map) | |
297 | return map->virt + (phys - map->phys); | |
620242ae MS |
298 | |
299 | return NULL; | |
300 | } | |
301 | ||
13606a2d RW |
302 | void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size) |
303 | { | |
304 | struct acpi_ioremap *map; | |
305 | void __iomem *virt = NULL; | |
306 | ||
307 | mutex_lock(&acpi_ioremap_lock); | |
308 | map = acpi_map_lookup(phys, size); | |
309 | if (map) { | |
310 | virt = map->virt + (phys - map->phys); | |
311 | map->refcount++; | |
312 | } | |
313 | mutex_unlock(&acpi_ioremap_lock); | |
314 | return virt; | |
315 | } | |
316 | EXPORT_SYMBOL_GPL(acpi_os_get_iomem); | |
317 | ||
78cdb3ed | 318 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
620242ae MS |
319 | static struct acpi_ioremap * |
320 | acpi_map_lookup_virt(void __iomem *virt, acpi_size size) | |
321 | { | |
322 | struct acpi_ioremap *map; | |
323 | ||
78cdb3ed | 324 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
4a3cba5e MS |
325 | if (map->virt <= virt && |
326 | virt + size <= map->virt + map->size) | |
620242ae MS |
327 | return map; |
328 | ||
329 | return NULL; | |
330 | } | |
331 | ||
2fdf0741 JB |
332 | void __iomem *__init_refok |
333 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size) | |
1da177e4 | 334 | { |
7ffd0443 | 335 | struct acpi_ioremap *map; |
620242ae | 336 | void __iomem *virt; |
2d6d9fd3 RW |
337 | acpi_physical_address pg_off; |
338 | acpi_size pg_sz; | |
620242ae | 339 | |
9f4fd61f BH |
340 | if (phys > ULONG_MAX) { |
341 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
70c0846e | 342 | return NULL; |
1da177e4 | 343 | } |
620242ae MS |
344 | |
345 | if (!acpi_gbl_permanent_mmap) | |
ad71860a | 346 | return __acpi_map_table((unsigned long)phys, size); |
620242ae | 347 | |
7ffd0443 RW |
348 | mutex_lock(&acpi_ioremap_lock); |
349 | /* Check if there's a suitable mapping already. */ | |
350 | map = acpi_map_lookup(phys, size); | |
351 | if (map) { | |
b7c1fadd | 352 | map->refcount++; |
7ffd0443 RW |
353 | goto out; |
354 | } | |
355 | ||
620242ae | 356 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
7ffd0443 RW |
357 | if (!map) { |
358 | mutex_unlock(&acpi_ioremap_lock); | |
620242ae | 359 | return NULL; |
7ffd0443 | 360 | } |
620242ae | 361 | |
4a3cba5e MS |
362 | pg_off = round_down(phys, PAGE_SIZE); |
363 | pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; | |
2d6d9fd3 | 364 | virt = acpi_os_ioremap(pg_off, pg_sz); |
620242ae | 365 | if (!virt) { |
7ffd0443 | 366 | mutex_unlock(&acpi_ioremap_lock); |
620242ae MS |
367 | kfree(map); |
368 | return NULL; | |
369 | } | |
370 | ||
371 | INIT_LIST_HEAD(&map->list); | |
372 | map->virt = virt; | |
4a3cba5e MS |
373 | map->phys = pg_off; |
374 | map->size = pg_sz; | |
b7c1fadd | 375 | map->refcount = 1; |
620242ae | 376 | |
78cdb3ed | 377 | list_add_tail_rcu(&map->list, &acpi_ioremaps); |
620242ae | 378 | |
7ffd0443 RW |
379 | out: |
380 | mutex_unlock(&acpi_ioremap_lock); | |
4a3cba5e | 381 | return map->virt + (phys - map->phys); |
1da177e4 | 382 | } |
55a82ab3 | 383 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 384 | |
b7c1fadd | 385 | static void acpi_os_drop_map_ref(struct acpi_ioremap *map) |
4a3cba5e | 386 | { |
b7c1fadd RW |
387 | if (!--map->refcount) |
388 | list_del_rcu(&map->list); | |
4a3cba5e | 389 | } |
4a3cba5e | 390 | |
b7c1fadd | 391 | static void acpi_os_map_cleanup(struct acpi_ioremap *map) |
7fe135dc | 392 | { |
b7c1fadd RW |
393 | if (!map->refcount) { |
394 | synchronize_rcu(); | |
395 | iounmap(map->virt); | |
396 | kfree(map); | |
397 | } | |
4a3cba5e MS |
398 | } |
399 | ||
0d3a9cf5 | 400 | void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
1da177e4 | 401 | { |
620242ae | 402 | struct acpi_ioremap *map; |
620242ae MS |
403 | |
404 | if (!acpi_gbl_permanent_mmap) { | |
7d97277b | 405 | __acpi_unmap_table(virt, size); |
620242ae MS |
406 | return; |
407 | } | |
408 | ||
7bbb8903 | 409 | mutex_lock(&acpi_ioremap_lock); |
620242ae MS |
410 | map = acpi_map_lookup_virt(virt, size); |
411 | if (!map) { | |
7bbb8903 | 412 | mutex_unlock(&acpi_ioremap_lock); |
7fe135dc | 413 | WARN(true, PREFIX "%s: bad address %p\n", __func__, virt); |
620242ae MS |
414 | return; |
415 | } | |
b7c1fadd | 416 | acpi_os_drop_map_ref(map); |
7bbb8903 | 417 | mutex_unlock(&acpi_ioremap_lock); |
620242ae | 418 | |
b7c1fadd | 419 | acpi_os_map_cleanup(map); |
1da177e4 | 420 | } |
55a82ab3 | 421 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 | 422 | |
0d3a9cf5 | 423 | void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
7d97277b YL |
424 | { |
425 | if (!acpi_gbl_permanent_mmap) | |
426 | __acpi_unmap_table(virt, size); | |
427 | } | |
428 | ||
073b4964 | 429 | static int acpi_os_map_generic_address(struct acpi_generic_address *addr) |
29718521 MS |
430 | { |
431 | void __iomem *virt; | |
432 | ||
433 | if (addr->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) | |
434 | return 0; | |
435 | ||
436 | if (!addr->address || !addr->bit_width) | |
437 | return -EINVAL; | |
438 | ||
439 | virt = acpi_os_map_memory(addr->address, addr->bit_width / 8); | |
440 | if (!virt) | |
441 | return -EIO; | |
442 | ||
443 | return 0; | |
444 | } | |
29718521 | 445 | |
073b4964 | 446 | static void acpi_os_unmap_generic_address(struct acpi_generic_address *addr) |
29718521 | 447 | { |
7fe135dc | 448 | struct acpi_ioremap *map; |
29718521 MS |
449 | |
450 | if (addr->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) | |
451 | return; | |
452 | ||
453 | if (!addr->address || !addr->bit_width) | |
454 | return; | |
455 | ||
7bbb8903 | 456 | mutex_lock(&acpi_ioremap_lock); |
7fe135dc RW |
457 | map = acpi_map_lookup(addr->address, addr->bit_width / 8); |
458 | if (!map) { | |
459 | mutex_unlock(&acpi_ioremap_lock); | |
460 | return; | |
461 | } | |
b7c1fadd | 462 | acpi_os_drop_map_ref(map); |
7bbb8903 | 463 | mutex_unlock(&acpi_ioremap_lock); |
29718521 | 464 | |
b7c1fadd | 465 | acpi_os_map_cleanup(map); |
29718521 | 466 | } |
29718521 | 467 | |
1da177e4 LT |
468 | #ifdef ACPI_FUTURE_USAGE |
469 | acpi_status | |
4be44fcd | 470 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 471 | { |
4be44fcd | 472 | if (!phys || !virt) |
1da177e4 LT |
473 | return AE_BAD_PARAMETER; |
474 | ||
475 | *phys = virt_to_phys(virt); | |
476 | ||
477 | return AE_OK; | |
478 | } | |
479 | #endif | |
480 | ||
481 | #define ACPI_MAX_OVERRIDE_LEN 100 | |
482 | ||
483 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
484 | ||
485 | acpi_status | |
4be44fcd LB |
486 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
487 | acpi_string * new_val) | |
1da177e4 LT |
488 | { |
489 | if (!init_val || !new_val) | |
490 | return AE_BAD_PARAMETER; | |
491 | ||
492 | *new_val = NULL; | |
4be44fcd | 493 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 494 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 495 | acpi_os_name); |
1da177e4 LT |
496 | *new_val = acpi_os_name; |
497 | } | |
498 | ||
499 | return AE_OK; | |
500 | } | |
501 | ||
502 | acpi_status | |
4be44fcd LB |
503 | acpi_os_table_override(struct acpi_table_header * existing_table, |
504 | struct acpi_table_header ** new_table) | |
1da177e4 LT |
505 | { |
506 | if (!existing_table || !new_table) | |
507 | return AE_BAD_PARAMETER; | |
508 | ||
71fc47a9 MG |
509 | *new_table = NULL; |
510 | ||
1da177e4 LT |
511 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
512 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
4be44fcd | 513 | *new_table = (struct acpi_table_header *)AmlCode; |
1da177e4 | 514 | #endif |
6ed31e92 ÉP |
515 | if (*new_table != NULL) { |
516 | printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], " | |
517 | "this is unsafe: tainting kernel\n", | |
518 | existing_table->signature, | |
519 | existing_table->oem_table_id); | |
520 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE); | |
521 | } | |
1da177e4 LT |
522 | return AE_OK; |
523 | } | |
524 | ||
7d12e780 | 525 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 526 | { |
5229e87d LB |
527 | u32 handled; |
528 | ||
529 | handled = (*acpi_irq_handler) (acpi_irq_context); | |
530 | ||
531 | if (handled) { | |
532 | acpi_irq_handled++; | |
533 | return IRQ_HANDLED; | |
88bea188 LB |
534 | } else { |
535 | acpi_irq_not_handled++; | |
5229e87d | 536 | return IRQ_NONE; |
88bea188 | 537 | } |
1da177e4 LT |
538 | } |
539 | ||
540 | acpi_status | |
4be44fcd LB |
541 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
542 | void *context) | |
1da177e4 LT |
543 | { |
544 | unsigned int irq; | |
545 | ||
5229e87d LB |
546 | acpi_irq_stats_init(); |
547 | ||
1da177e4 | 548 | /* |
23fe3630 RW |
549 | * ACPI interrupts different from the SCI in our copy of the FADT are |
550 | * not supported. | |
1da177e4 | 551 | */ |
23fe3630 RW |
552 | if (gsi != acpi_gbl_FADT.sci_interrupt) |
553 | return AE_BAD_PARAMETER; | |
554 | ||
555 | if (acpi_irq_handler) | |
556 | return AE_ALREADY_ACQUIRED; | |
557 | ||
1da177e4 LT |
558 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
559 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
560 | gsi); | |
561 | return AE_OK; | |
562 | } | |
563 | ||
564 | acpi_irq_handler = handler; | |
565 | acpi_irq_context = context; | |
dace1453 | 566 | if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
1da177e4 | 567 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
23fe3630 | 568 | acpi_irq_handler = NULL; |
1da177e4 LT |
569 | return AE_NOT_ACQUIRED; |
570 | } | |
1da177e4 LT |
571 | |
572 | return AE_OK; | |
573 | } | |
574 | ||
4be44fcd | 575 | acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) |
1da177e4 | 576 | { |
23fe3630 RW |
577 | if (irq != acpi_gbl_FADT.sci_interrupt) |
578 | return AE_BAD_PARAMETER; | |
579 | ||
580 | free_irq(irq, acpi_irq); | |
581 | acpi_irq_handler = NULL; | |
1da177e4 LT |
582 | |
583 | return AE_OK; | |
584 | } | |
585 | ||
586 | /* | |
587 | * Running in interpreter thread context, safe to sleep | |
588 | */ | |
589 | ||
439913ff | 590 | void acpi_os_sleep(u64 ms) |
1da177e4 | 591 | { |
01a527ec | 592 | schedule_timeout_interruptible(msecs_to_jiffies(ms)); |
1da177e4 | 593 | } |
4be44fcd | 594 | |
4be44fcd | 595 | void acpi_os_stall(u32 us) |
1da177e4 LT |
596 | { |
597 | while (us) { | |
598 | u32 delay = 1000; | |
599 | ||
600 | if (delay > us) | |
601 | delay = us; | |
602 | udelay(delay); | |
603 | touch_nmi_watchdog(); | |
604 | us -= delay; | |
605 | } | |
606 | } | |
4be44fcd | 607 | |
1da177e4 LT |
608 | /* |
609 | * Support ACPI 3.0 AML Timer operand | |
610 | * Returns 64-bit free-running, monotonically increasing timer | |
611 | * with 100ns granularity | |
612 | */ | |
4be44fcd | 613 | u64 acpi_os_get_timer(void) |
1da177e4 LT |
614 | { |
615 | static u64 t; | |
616 | ||
617 | #ifdef CONFIG_HPET | |
618 | /* TBD: use HPET if available */ | |
619 | #endif | |
620 | ||
621 | #ifdef CONFIG_X86_PM_TIMER | |
622 | /* TBD: default to PM timer if HPET was not available */ | |
623 | #endif | |
624 | if (!t) | |
625 | printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n"); | |
626 | ||
627 | return ++t; | |
628 | } | |
629 | ||
4be44fcd | 630 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
631 | { |
632 | u32 dummy; | |
633 | ||
634 | if (!value) | |
635 | value = &dummy; | |
636 | ||
49fbabf5 ZY |
637 | *value = 0; |
638 | if (width <= 8) { | |
4be44fcd | 639 | *(u8 *) value = inb(port); |
49fbabf5 | 640 | } else if (width <= 16) { |
4be44fcd | 641 | *(u16 *) value = inw(port); |
49fbabf5 | 642 | } else if (width <= 32) { |
4be44fcd | 643 | *(u32 *) value = inl(port); |
49fbabf5 | 644 | } else { |
1da177e4 LT |
645 | BUG(); |
646 | } | |
647 | ||
648 | return AE_OK; | |
649 | } | |
4be44fcd | 650 | |
1da177e4 LT |
651 | EXPORT_SYMBOL(acpi_os_read_port); |
652 | ||
4be44fcd | 653 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 654 | { |
49fbabf5 | 655 | if (width <= 8) { |
1da177e4 | 656 | outb(value, port); |
49fbabf5 | 657 | } else if (width <= 16) { |
1da177e4 | 658 | outw(value, port); |
49fbabf5 | 659 | } else if (width <= 32) { |
1da177e4 | 660 | outl(value, port); |
49fbabf5 | 661 | } else { |
1da177e4 LT |
662 | BUG(); |
663 | } | |
664 | ||
665 | return AE_OK; | |
666 | } | |
4be44fcd | 667 | |
1da177e4 LT |
668 | EXPORT_SYMBOL(acpi_os_write_port); |
669 | ||
670 | acpi_status | |
4be44fcd | 671 | acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width) |
1da177e4 | 672 | { |
4be44fcd | 673 | void __iomem *virt_addr; |
884b821f RW |
674 | unsigned int size = width / 8; |
675 | bool unmap = false; | |
676 | u32 dummy; | |
620242ae | 677 | |
78cdb3ed | 678 | rcu_read_lock(); |
620242ae | 679 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); |
620242ae | 680 | if (!virt_addr) { |
884b821f | 681 | rcu_read_unlock(); |
2d6d9fd3 | 682 | virt_addr = acpi_os_ioremap(phys_addr, size); |
884b821f RW |
683 | if (!virt_addr) |
684 | return AE_BAD_ADDRESS; | |
685 | unmap = true; | |
620242ae | 686 | } |
884b821f | 687 | |
1da177e4 LT |
688 | if (!value) |
689 | value = &dummy; | |
690 | ||
691 | switch (width) { | |
692 | case 8: | |
4be44fcd | 693 | *(u8 *) value = readb(virt_addr); |
1da177e4 LT |
694 | break; |
695 | case 16: | |
4be44fcd | 696 | *(u16 *) value = readw(virt_addr); |
1da177e4 LT |
697 | break; |
698 | case 32: | |
4be44fcd | 699 | *(u32 *) value = readl(virt_addr); |
1da177e4 LT |
700 | break; |
701 | default: | |
702 | BUG(); | |
703 | } | |
704 | ||
620242ae MS |
705 | if (unmap) |
706 | iounmap(virt_addr); | |
884b821f RW |
707 | else |
708 | rcu_read_unlock(); | |
1da177e4 LT |
709 | |
710 | return AE_OK; | |
711 | } | |
712 | ||
713 | acpi_status | |
4be44fcd | 714 | acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width) |
1da177e4 | 715 | { |
4be44fcd | 716 | void __iomem *virt_addr; |
884b821f RW |
717 | unsigned int size = width / 8; |
718 | bool unmap = false; | |
620242ae | 719 | |
78cdb3ed | 720 | rcu_read_lock(); |
620242ae | 721 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); |
620242ae | 722 | if (!virt_addr) { |
884b821f | 723 | rcu_read_unlock(); |
2d6d9fd3 | 724 | virt_addr = acpi_os_ioremap(phys_addr, size); |
884b821f RW |
725 | if (!virt_addr) |
726 | return AE_BAD_ADDRESS; | |
727 | unmap = true; | |
620242ae | 728 | } |
1da177e4 LT |
729 | |
730 | switch (width) { | |
731 | case 8: | |
732 | writeb(value, virt_addr); | |
733 | break; | |
734 | case 16: | |
735 | writew(value, virt_addr); | |
736 | break; | |
737 | case 32: | |
738 | writel(value, virt_addr); | |
739 | break; | |
740 | default: | |
741 | BUG(); | |
742 | } | |
743 | ||
620242ae MS |
744 | if (unmap) |
745 | iounmap(virt_addr); | |
884b821f RW |
746 | else |
747 | rcu_read_unlock(); | |
1da177e4 LT |
748 | |
749 | return AE_OK; | |
750 | } | |
751 | ||
1da177e4 | 752 | acpi_status |
4be44fcd | 753 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
c5f0231e | 754 | u64 *value, u32 width) |
1da177e4 LT |
755 | { |
756 | int result, size; | |
c5f0231e | 757 | u32 value32; |
1da177e4 LT |
758 | |
759 | if (!value) | |
760 | return AE_BAD_PARAMETER; | |
761 | ||
762 | switch (width) { | |
763 | case 8: | |
764 | size = 1; | |
765 | break; | |
766 | case 16: | |
767 | size = 2; | |
768 | break; | |
769 | case 32: | |
770 | size = 4; | |
771 | break; | |
772 | default: | |
773 | return AE_ERROR; | |
774 | } | |
775 | ||
b6ce068a MW |
776 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
777 | PCI_DEVFN(pci_id->device, pci_id->function), | |
c5f0231e BM |
778 | reg, size, &value32); |
779 | *value = value32; | |
1da177e4 LT |
780 | |
781 | return (result ? AE_ERROR : AE_OK); | |
782 | } | |
4be44fcd | 783 | |
1da177e4 | 784 | acpi_status |
4be44fcd | 785 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
439913ff | 786 | u64 value, u32 width) |
1da177e4 LT |
787 | { |
788 | int result, size; | |
789 | ||
790 | switch (width) { | |
791 | case 8: | |
792 | size = 1; | |
793 | break; | |
794 | case 16: | |
795 | size = 2; | |
796 | break; | |
797 | case 32: | |
798 | size = 4; | |
799 | break; | |
800 | default: | |
801 | return AE_ERROR; | |
802 | } | |
803 | ||
b6ce068a MW |
804 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
805 | PCI_DEVFN(pci_id->device, pci_id->function), | |
806 | reg, size, value); | |
1da177e4 LT |
807 | |
808 | return (result ? AE_ERROR : AE_OK); | |
809 | } | |
810 | ||
65f27f38 | 811 | static void acpi_os_execute_deferred(struct work_struct *work) |
88db5e14 AS |
812 | { |
813 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
88db5e14 | 814 | |
9ac61856 BH |
815 | if (dpc->wait) |
816 | acpi_os_wait_events_complete(NULL); | |
19cd847a ZR |
817 | |
818 | dpc->function(dpc->context); | |
819 | kfree(dpc); | |
19cd847a ZR |
820 | } |
821 | ||
b8d35192 AS |
822 | /******************************************************************************* |
823 | * | |
824 | * FUNCTION: acpi_os_execute | |
825 | * | |
826 | * PARAMETERS: Type - Type of the callback | |
827 | * Function - Function to be executed | |
828 | * Context - Function parameters | |
829 | * | |
830 | * RETURN: Status | |
831 | * | |
832 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
833 | * immediately executes function on a separate thread. | |
834 | * | |
835 | ******************************************************************************/ | |
836 | ||
19cd847a ZR |
837 | static acpi_status __acpi_os_execute(acpi_execute_type type, |
838 | acpi_osd_exec_callback function, void *context, int hp) | |
1da177e4 | 839 | { |
4be44fcd LB |
840 | acpi_status status = AE_OK; |
841 | struct acpi_os_dpc *dpc; | |
17bc54ee | 842 | struct workqueue_struct *queue; |
19cd847a | 843 | int ret; |
72945b2b LB |
844 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
845 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
846 | function, context)); | |
1da177e4 | 847 | |
1da177e4 LT |
848 | /* |
849 | * Allocate/initialize DPC structure. Note that this memory will be | |
65f27f38 | 850 | * freed by the callee. The kernel handles the work_struct list in a |
1da177e4 LT |
851 | * way that allows us to also free its memory inside the callee. |
852 | * Because we may want to schedule several tasks with different | |
853 | * parameters we can't use the approach some kernel code uses of | |
65f27f38 | 854 | * having a static work_struct. |
1da177e4 | 855 | */ |
72945b2b | 856 | |
65f27f38 | 857 | dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
1da177e4 | 858 | if (!dpc) |
889c78be | 859 | return AE_NO_MEMORY; |
b976fe19 | 860 | |
1da177e4 LT |
861 | dpc->function = function; |
862 | dpc->context = context; | |
b976fe19 | 863 | |
c02256be ZR |
864 | /* |
865 | * We can't run hotplug code in keventd_wq/kacpid_wq/kacpid_notify_wq | |
866 | * because the hotplug code may call driver .remove() functions, | |
867 | * which invoke flush_scheduled_work/acpi_os_wait_events_complete | |
868 | * to flush these workqueues. | |
869 | */ | |
870 | queue = hp ? kacpi_hotplug_wq : | |
871 | (type == OSL_NOTIFY_HANDLER ? kacpi_notify_wq : kacpid_wq); | |
9ac61856 | 872 | dpc->wait = hp ? 1 : 0; |
bc73675b ZR |
873 | |
874 | if (queue == kacpi_hotplug_wq) | |
875 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); | |
876 | else if (queue == kacpi_notify_wq) | |
877 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); | |
878 | else | |
879 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); | |
880 | ||
8fec62b2 TH |
881 | /* |
882 | * On some machines, a software-initiated SMI causes corruption unless | |
883 | * the SMI runs on CPU 0. An SMI can be initiated by any AML, but | |
884 | * typically it's done in GPE-related methods that are run via | |
885 | * workqueues, so we can avoid the known corruption cases by always | |
886 | * queueing on CPU 0. | |
887 | */ | |
888 | ret = queue_work_on(0, queue, &dpc->work); | |
19cd847a ZR |
889 | |
890 | if (!ret) { | |
55ac9a01 LM |
891 | printk(KERN_ERR PREFIX |
892 | "Call to queue_work() failed.\n"); | |
17bc54ee AS |
893 | status = AE_ERROR; |
894 | kfree(dpc); | |
1da177e4 | 895 | } |
889c78be | 896 | return status; |
1da177e4 | 897 | } |
4be44fcd | 898 | |
19cd847a ZR |
899 | acpi_status acpi_os_execute(acpi_execute_type type, |
900 | acpi_osd_exec_callback function, void *context) | |
901 | { | |
902 | return __acpi_os_execute(type, function, context, 0); | |
903 | } | |
b8d35192 | 904 | EXPORT_SYMBOL(acpi_os_execute); |
1da177e4 | 905 | |
19cd847a ZR |
906 | acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function, |
907 | void *context) | |
908 | { | |
909 | return __acpi_os_execute(0, function, context, 1); | |
910 | } | |
911 | ||
4be44fcd | 912 | void acpi_os_wait_events_complete(void *context) |
1da177e4 LT |
913 | { |
914 | flush_workqueue(kacpid_wq); | |
2f67a069 | 915 | flush_workqueue(kacpi_notify_wq); |
1da177e4 | 916 | } |
4be44fcd | 917 | |
1da177e4 LT |
918 | EXPORT_SYMBOL(acpi_os_wait_events_complete); |
919 | ||
1da177e4 | 920 | acpi_status |
4be44fcd | 921 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 922 | { |
4be44fcd | 923 | struct semaphore *sem = NULL; |
1da177e4 | 924 | |
1da177e4 LT |
925 | sem = acpi_os_allocate(sizeof(struct semaphore)); |
926 | if (!sem) | |
d550d98d | 927 | return AE_NO_MEMORY; |
1da177e4 LT |
928 | memset(sem, 0, sizeof(struct semaphore)); |
929 | ||
930 | sema_init(sem, initial_units); | |
931 | ||
4be44fcd | 932 | *handle = (acpi_handle *) sem; |
1da177e4 | 933 | |
4be44fcd LB |
934 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
935 | *handle, initial_units)); | |
1da177e4 | 936 | |
d550d98d | 937 | return AE_OK; |
1da177e4 | 938 | } |
1da177e4 | 939 | |
1da177e4 LT |
940 | /* |
941 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
942 | * 'delete_semaphore()' function -- may result in an invalid | |
943 | * pointer dereference for non-synchronized consumers. Should | |
944 | * we at least check for blocked threads and signal/cancel them? | |
945 | */ | |
946 | ||
4be44fcd | 947 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 948 | { |
4be44fcd | 949 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 950 | |
1da177e4 | 951 | if (!sem) |
d550d98d | 952 | return AE_BAD_PARAMETER; |
1da177e4 | 953 | |
4be44fcd | 954 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 955 | |
f1241c87 | 956 | BUG_ON(!list_empty(&sem->wait_list)); |
02438d87 | 957 | kfree(sem); |
4be44fcd | 958 | sem = NULL; |
1da177e4 | 959 | |
d550d98d | 960 | return AE_OK; |
1da177e4 | 961 | } |
1da177e4 | 962 | |
1da177e4 | 963 | /* |
1da177e4 LT |
964 | * TODO: Support for units > 1? |
965 | */ | |
4be44fcd | 966 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 967 | { |
4be44fcd LB |
968 | acpi_status status = AE_OK; |
969 | struct semaphore *sem = (struct semaphore *)handle; | |
f1241c87 | 970 | long jiffies; |
4be44fcd | 971 | int ret = 0; |
1da177e4 | 972 | |
1da177e4 | 973 | if (!sem || (units < 1)) |
d550d98d | 974 | return AE_BAD_PARAMETER; |
1da177e4 LT |
975 | |
976 | if (units > 1) | |
d550d98d | 977 | return AE_SUPPORT; |
1da177e4 | 978 | |
4be44fcd LB |
979 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
980 | handle, units, timeout)); | |
1da177e4 | 981 | |
f1241c87 MW |
982 | if (timeout == ACPI_WAIT_FOREVER) |
983 | jiffies = MAX_SCHEDULE_TIMEOUT; | |
984 | else | |
985 | jiffies = msecs_to_jiffies(timeout); | |
986 | ||
987 | ret = down_timeout(sem, jiffies); | |
988 | if (ret) | |
989 | status = AE_TIME; | |
1da177e4 LT |
990 | |
991 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 992 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 993 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
994 | handle, units, timeout, |
995 | acpi_format_exception(status))); | |
996 | } else { | |
997 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 998 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 999 | units, timeout)); |
1da177e4 LT |
1000 | } |
1001 | ||
d550d98d | 1002 | return status; |
1da177e4 | 1003 | } |
1da177e4 | 1004 | |
1da177e4 LT |
1005 | /* |
1006 | * TODO: Support for units > 1? | |
1007 | */ | |
4be44fcd | 1008 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 1009 | { |
4be44fcd | 1010 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1011 | |
1da177e4 | 1012 | if (!sem || (units < 1)) |
d550d98d | 1013 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1014 | |
1015 | if (units > 1) | |
d550d98d | 1016 | return AE_SUPPORT; |
1da177e4 | 1017 | |
4be44fcd LB |
1018 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
1019 | units)); | |
1da177e4 LT |
1020 | |
1021 | up(sem); | |
1022 | ||
d550d98d | 1023 | return AE_OK; |
1da177e4 | 1024 | } |
4be44fcd | 1025 | |
1da177e4 | 1026 | #ifdef ACPI_FUTURE_USAGE |
4be44fcd | 1027 | u32 acpi_os_get_line(char *buffer) |
1da177e4 LT |
1028 | { |
1029 | ||
1030 | #ifdef ENABLE_DEBUGGER | |
1031 | if (acpi_in_debugger) { | |
1032 | u32 chars; | |
1033 | ||
1034 | kdb_read(buffer, sizeof(line_buf)); | |
1035 | ||
1036 | /* remove the CR kdb includes */ | |
1037 | chars = strlen(buffer) - 1; | |
1038 | buffer[chars] = '\0'; | |
1039 | } | |
1040 | #endif | |
1041 | ||
1042 | return 0; | |
1043 | } | |
4be44fcd | 1044 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 | 1045 | |
4be44fcd | 1046 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 1047 | { |
4be44fcd | 1048 | switch (function) { |
1da177e4 LT |
1049 | case ACPI_SIGNAL_FATAL: |
1050 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
1051 | break; | |
1052 | case ACPI_SIGNAL_BREAKPOINT: | |
1053 | /* | |
1054 | * AML Breakpoint | |
1055 | * ACPI spec. says to treat it as a NOP unless | |
1056 | * you are debugging. So if/when we integrate | |
1057 | * AML debugger into the kernel debugger its | |
1058 | * hook will go here. But until then it is | |
1059 | * not useful to print anything on breakpoints. | |
1060 | */ | |
1061 | break; | |
1062 | default: | |
1063 | break; | |
1064 | } | |
1065 | ||
1066 | return AE_OK; | |
1067 | } | |
4be44fcd | 1068 | |
4be44fcd | 1069 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
1070 | { |
1071 | char *p = acpi_os_name; | |
4be44fcd | 1072 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
1073 | |
1074 | if (!str || !*str) | |
1075 | return 0; | |
1076 | ||
1077 | for (; count-- && str && *str; str++) { | |
1078 | if (isalnum(*str) || *str == ' ' || *str == ':') | |
1079 | *p++ = *str; | |
1080 | else if (*str == '\'' || *str == '"') | |
1081 | continue; | |
1082 | else | |
1083 | break; | |
1084 | } | |
1085 | *p = 0; | |
1086 | ||
1087 | return 1; | |
4be44fcd | 1088 | |
1da177e4 LT |
1089 | } |
1090 | ||
1091 | __setup("acpi_os_name=", acpi_os_name_setup); | |
1092 | ||
12d32064 LM |
1093 | #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ |
1094 | #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */ | |
1095 | ||
1096 | struct osi_setup_entry { | |
1097 | char string[OSI_STRING_LENGTH_MAX]; | |
1098 | bool enable; | |
1099 | }; | |
1100 | ||
aa165971 SL |
1101 | static struct osi_setup_entry __initdata |
1102 | osi_setup_entries[OSI_STRING_ENTRIES_MAX] = { | |
1103 | {"Module Device", true}, | |
1104 | {"Processor Device", true}, | |
1105 | {"3.0 _SCP Extensions", true}, | |
1106 | {"Processor Aggregator Device", true}, | |
1107 | }; | |
12d32064 | 1108 | |
d90aa92c LM |
1109 | void __init acpi_osi_setup(char *str) |
1110 | { | |
12d32064 LM |
1111 | struct osi_setup_entry *osi; |
1112 | bool enable = true; | |
1113 | int i; | |
1114 | ||
d90aa92c LM |
1115 | if (!acpi_gbl_create_osi_method) |
1116 | return; | |
1117 | ||
1118 | if (str == NULL || *str == '\0') { | |
1119 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
1120 | acpi_gbl_create_osi_method = FALSE; | |
12d32064 LM |
1121 | return; |
1122 | } | |
1123 | ||
1124 | if (*str == '!') { | |
1125 | str++; | |
1126 | enable = false; | |
1127 | } | |
1128 | ||
1129 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { | |
1130 | osi = &osi_setup_entries[i]; | |
1131 | if (!strcmp(osi->string, str)) { | |
1132 | osi->enable = enable; | |
1133 | break; | |
1134 | } else if (osi->string[0] == '\0') { | |
1135 | osi->enable = enable; | |
1136 | strncpy(osi->string, str, OSI_STRING_LENGTH_MAX); | |
1137 | break; | |
1138 | } | |
1139 | } | |
d90aa92c LM |
1140 | } |
1141 | ||
d4b7dc49 LB |
1142 | static void __init set_osi_linux(unsigned int enable) |
1143 | { | |
d90aa92c | 1144 | if (osi_linux.enable != enable) |
d4b7dc49 | 1145 | osi_linux.enable = enable; |
b0ed7a91 LM |
1146 | |
1147 | if (osi_linux.enable) | |
1148 | acpi_osi_setup("Linux"); | |
1149 | else | |
1150 | acpi_osi_setup("!Linux"); | |
1151 | ||
d4b7dc49 LB |
1152 | return; |
1153 | } | |
1154 | ||
1155 | static void __init acpi_cmdline_osi_linux(unsigned int enable) | |
1156 | { | |
d90aa92c LM |
1157 | osi_linux.cmdline = 1; /* cmdline set the default and override DMI */ |
1158 | osi_linux.dmi = 0; | |
d4b7dc49 LB |
1159 | set_osi_linux(enable); |
1160 | ||
1161 | return; | |
1162 | } | |
1163 | ||
1164 | void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) | |
1165 | { | |
d4b7dc49 LB |
1166 | printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); |
1167 | ||
1168 | if (enable == -1) | |
1169 | return; | |
1170 | ||
d90aa92c | 1171 | osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */ |
d4b7dc49 | 1172 | set_osi_linux(enable); |
f507654d | 1173 | |
f507654d LB |
1174 | return; |
1175 | } | |
1176 | ||
1da177e4 | 1177 | /* |
ae00d812 LB |
1178 | * Modify the list of "OS Interfaces" reported to BIOS via _OSI |
1179 | * | |
1da177e4 | 1180 | * empty string disables _OSI |
ae00d812 LB |
1181 | * string starting with '!' disables that string |
1182 | * otherwise string is added to list, augmenting built-in strings | |
1da177e4 | 1183 | */ |
b0ed7a91 | 1184 | static void __init acpi_osi_setup_late(void) |
1da177e4 | 1185 | { |
12d32064 LM |
1186 | struct osi_setup_entry *osi; |
1187 | char *str; | |
1188 | int i; | |
d90aa92c | 1189 | acpi_status status; |
b0ed7a91 | 1190 | |
12d32064 LM |
1191 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { |
1192 | osi = &osi_setup_entries[i]; | |
1193 | str = osi->string; | |
b0ed7a91 | 1194 | |
12d32064 LM |
1195 | if (*str == '\0') |
1196 | break; | |
1197 | if (osi->enable) { | |
1198 | status = acpi_install_interface(str); | |
d90aa92c | 1199 | |
12d32064 LM |
1200 | if (ACPI_SUCCESS(status)) |
1201 | printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); | |
1202 | } else { | |
1203 | status = acpi_remove_interface(str); | |
d90aa92c | 1204 | |
12d32064 LM |
1205 | if (ACPI_SUCCESS(status)) |
1206 | printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); | |
1207 | } | |
b0ed7a91 LM |
1208 | } |
1209 | } | |
1210 | ||
d90aa92c | 1211 | static int __init osi_setup(char *str) |
b0ed7a91 | 1212 | { |
d90aa92c LM |
1213 | if (str && !strcmp("Linux", str)) |
1214 | acpi_cmdline_osi_linux(1); | |
1215 | else if (str && !strcmp("!Linux", str)) | |
1216 | acpi_cmdline_osi_linux(0); | |
1217 | else | |
1218 | acpi_osi_setup(str); | |
1da177e4 LT |
1219 | |
1220 | return 1; | |
1221 | } | |
1222 | ||
d90aa92c | 1223 | __setup("acpi_osi=", osi_setup); |
1da177e4 LT |
1224 | |
1225 | /* enable serialization to combat AE_ALREADY_EXISTS errors */ | |
4be44fcd | 1226 | static int __init acpi_serialize_setup(char *str) |
1da177e4 LT |
1227 | { |
1228 | printk(KERN_INFO PREFIX "serialize enabled\n"); | |
1229 | ||
1230 | acpi_gbl_all_methods_serialized = TRUE; | |
1231 | ||
1232 | return 1; | |
1233 | } | |
1234 | ||
1235 | __setup("acpi_serialize", acpi_serialize_setup); | |
1236 | ||
df92e695 TR |
1237 | /* Check of resource interference between native drivers and ACPI |
1238 | * OperationRegions (SystemIO and System Memory only). | |
1239 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem | |
1240 | * in arbitrary AML code and can interfere with legacy drivers. | |
1241 | * acpi_enforce_resources= can be set to: | |
1242 | * | |
7e90560c | 1243 | * - strict (default) (2) |
df92e695 | 1244 | * -> further driver trying to access the resources will not load |
7e90560c | 1245 | * - lax (1) |
df92e695 TR |
1246 | * -> further driver trying to access the resources will load, but you |
1247 | * get a system message that something might go wrong... | |
1248 | * | |
1249 | * - no (0) | |
1250 | * -> ACPI Operation Region resources will not be registered | |
1251 | * | |
1252 | */ | |
1253 | #define ENFORCE_RESOURCES_STRICT 2 | |
1254 | #define ENFORCE_RESOURCES_LAX 1 | |
1255 | #define ENFORCE_RESOURCES_NO 0 | |
1256 | ||
7e90560c | 1257 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
df92e695 TR |
1258 | |
1259 | static int __init acpi_enforce_resources_setup(char *str) | |
1260 | { | |
1261 | if (str == NULL || *str == '\0') | |
1262 | return 0; | |
1263 | ||
1264 | if (!strcmp("strict", str)) | |
1265 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; | |
1266 | else if (!strcmp("lax", str)) | |
1267 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1268 | else if (!strcmp("no", str)) | |
1269 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; | |
1270 | ||
1271 | return 1; | |
1272 | } | |
1273 | ||
1274 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); | |
1275 | ||
1276 | /* Check for resource conflicts between ACPI OperationRegions and native | |
1277 | * drivers */ | |
876fba43 | 1278 | int acpi_check_resource_conflict(const struct resource *res) |
df92e695 TR |
1279 | { |
1280 | struct acpi_res_list *res_list_elem; | |
106d1a0a | 1281 | int ioport = 0, clash = 0; |
df92e695 TR |
1282 | |
1283 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1284 | return 0; | |
1285 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) | |
1286 | return 0; | |
1287 | ||
1288 | ioport = res->flags & IORESOURCE_IO; | |
1289 | ||
1290 | spin_lock(&acpi_res_lock); | |
1291 | list_for_each_entry(res_list_elem, &resource_list_head, | |
1292 | resource_list) { | |
1293 | if (ioport && (res_list_elem->resource_type | |
1294 | != ACPI_ADR_SPACE_SYSTEM_IO)) | |
1295 | continue; | |
1296 | if (!ioport && (res_list_elem->resource_type | |
1297 | != ACPI_ADR_SPACE_SYSTEM_MEMORY)) | |
1298 | continue; | |
1299 | ||
1300 | if (res->end < res_list_elem->start | |
1301 | || res_list_elem->end < res->start) | |
1302 | continue; | |
1303 | clash = 1; | |
1304 | break; | |
1305 | } | |
1306 | spin_unlock(&acpi_res_lock); | |
1307 | ||
1308 | if (clash) { | |
1309 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { | |
1638bca8 | 1310 | printk(KERN_WARNING "ACPI: resource %s %pR" |
106d1a0a TR |
1311 | " conflicts with ACPI region %s " |
1312 | "[%s 0x%zx-0x%zx]\n", | |
1638bca8 | 1313 | res->name, res, res_list_elem->name, |
106d1a0a TR |
1314 | (res_list_elem->resource_type == |
1315 | ACPI_ADR_SPACE_SYSTEM_IO) ? "io" : "mem", | |
1316 | (size_t) res_list_elem->start, | |
1317 | (size_t) res_list_elem->end); | |
14f03343 JD |
1318 | if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) |
1319 | printk(KERN_NOTICE "ACPI: This conflict may" | |
1320 | " cause random problems and system" | |
1321 | " instability\n"); | |
1322 | printk(KERN_INFO "ACPI: If an ACPI driver is available" | |
1323 | " for this device, you should use it instead of" | |
1324 | " the native driver\n"); | |
df92e695 TR |
1325 | } |
1326 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) | |
1327 | return -EBUSY; | |
1328 | } | |
1329 | return 0; | |
1330 | } | |
443dea72 | 1331 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
df92e695 TR |
1332 | |
1333 | int acpi_check_region(resource_size_t start, resource_size_t n, | |
1334 | const char *name) | |
1335 | { | |
1336 | struct resource res = { | |
1337 | .start = start, | |
1338 | .end = start + n - 1, | |
1339 | .name = name, | |
1340 | .flags = IORESOURCE_IO, | |
1341 | }; | |
1342 | ||
1343 | return acpi_check_resource_conflict(&res); | |
1344 | } | |
1345 | EXPORT_SYMBOL(acpi_check_region); | |
1346 | ||
70dd6bea JD |
1347 | /* |
1348 | * Let drivers know whether the resource checks are effective | |
1349 | */ | |
1350 | int acpi_resources_are_enforced(void) | |
1351 | { | |
1352 | return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; | |
1353 | } | |
1354 | EXPORT_SYMBOL(acpi_resources_are_enforced); | |
1355 | ||
9f63b88b LM |
1356 | /* |
1357 | * Deallocate the memory for a spinlock. | |
1358 | */ | |
1359 | void acpi_os_delete_lock(acpi_spinlock handle) | |
1360 | { | |
1361 | ACPI_FREE(handle); | |
1362 | } | |
1363 | ||
73459f73 RM |
1364 | /* |
1365 | * Acquire a spinlock. | |
1366 | * | |
1367 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1368 | */ |
1369 | ||
967440e3 | 1370 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 1371 | { |
b8e4d893 | 1372 | acpi_cpu_flags flags; |
967440e3 | 1373 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
1374 | return flags; |
1375 | } | |
1376 | ||
1377 | /* | |
1378 | * Release a spinlock. See above. | |
1379 | */ | |
1380 | ||
967440e3 | 1381 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 1382 | { |
967440e3 | 1383 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
1384 | } |
1385 | ||
73459f73 RM |
1386 | #ifndef ACPI_USE_LOCAL_CACHE |
1387 | ||
1388 | /******************************************************************************* | |
1389 | * | |
1390 | * FUNCTION: acpi_os_create_cache | |
1391 | * | |
b229cf92 BM |
1392 | * PARAMETERS: name - Ascii name for the cache |
1393 | * size - Size of each cached object | |
1394 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1395 | * cache - Where the new cache object is returned | |
73459f73 | 1396 | * |
b229cf92 | 1397 | * RETURN: status |
73459f73 RM |
1398 | * |
1399 | * DESCRIPTION: Create a cache object | |
1400 | * | |
1401 | ******************************************************************************/ | |
1402 | ||
1403 | acpi_status | |
4be44fcd | 1404 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1405 | { |
20c2df83 | 1406 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
a6fdbf90 | 1407 | if (*cache == NULL) |
b229cf92 BM |
1408 | return AE_ERROR; |
1409 | else | |
1410 | return AE_OK; | |
73459f73 RM |
1411 | } |
1412 | ||
1413 | /******************************************************************************* | |
1414 | * | |
1415 | * FUNCTION: acpi_os_purge_cache | |
1416 | * | |
1417 | * PARAMETERS: Cache - Handle to cache object | |
1418 | * | |
1419 | * RETURN: Status | |
1420 | * | |
1421 | * DESCRIPTION: Free all objects within the requested cache. | |
1422 | * | |
1423 | ******************************************************************************/ | |
1424 | ||
4be44fcd | 1425 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1426 | { |
50dd0969 | 1427 | kmem_cache_shrink(cache); |
4be44fcd | 1428 | return (AE_OK); |
73459f73 RM |
1429 | } |
1430 | ||
1431 | /******************************************************************************* | |
1432 | * | |
1433 | * FUNCTION: acpi_os_delete_cache | |
1434 | * | |
1435 | * PARAMETERS: Cache - Handle to cache object | |
1436 | * | |
1437 | * RETURN: Status | |
1438 | * | |
1439 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1440 | * cache object. | |
1441 | * | |
1442 | ******************************************************************************/ | |
1443 | ||
4be44fcd | 1444 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1445 | { |
1a1d92c1 | 1446 | kmem_cache_destroy(cache); |
4be44fcd | 1447 | return (AE_OK); |
73459f73 RM |
1448 | } |
1449 | ||
1450 | /******************************************************************************* | |
1451 | * | |
1452 | * FUNCTION: acpi_os_release_object | |
1453 | * | |
1454 | * PARAMETERS: Cache - Handle to cache object | |
1455 | * Object - The object to be released | |
1456 | * | |
1457 | * RETURN: None | |
1458 | * | |
1459 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1460 | * the object is deleted. | |
1461 | * | |
1462 | ******************************************************************************/ | |
1463 | ||
4be44fcd | 1464 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1465 | { |
4be44fcd LB |
1466 | kmem_cache_free(cache, object); |
1467 | return (AE_OK); | |
73459f73 RM |
1468 | } |
1469 | ||
a5fe1a03 LM |
1470 | static inline int acpi_res_list_add(struct acpi_res_list *res) |
1471 | { | |
1472 | struct acpi_res_list *res_list_elem; | |
1473 | ||
1474 | list_for_each_entry(res_list_elem, &resource_list_head, | |
1475 | resource_list) { | |
1476 | ||
1477 | if (res->resource_type == res_list_elem->resource_type && | |
1478 | res->start == res_list_elem->start && | |
1479 | res->end == res_list_elem->end) { | |
1480 | ||
1481 | /* | |
1482 | * The Region(addr,len) already exist in the list, | |
1483 | * just increase the count | |
1484 | */ | |
1485 | ||
1486 | res_list_elem->count++; | |
1487 | return 0; | |
1488 | } | |
1489 | } | |
1490 | ||
1491 | res->count = 1; | |
1492 | list_add(&res->resource_list, &resource_list_head); | |
1493 | return 1; | |
1494 | } | |
1495 | ||
1496 | static inline void acpi_res_list_del(struct acpi_res_list *res) | |
1497 | { | |
1498 | struct acpi_res_list *res_list_elem; | |
1499 | ||
1500 | list_for_each_entry(res_list_elem, &resource_list_head, | |
1501 | resource_list) { | |
1502 | ||
1503 | if (res->resource_type == res_list_elem->resource_type && | |
1504 | res->start == res_list_elem->start && | |
1505 | res->end == res_list_elem->end) { | |
1506 | ||
1507 | /* | |
1508 | * If the res count is decreased to 0, | |
1509 | * remove and free it | |
1510 | */ | |
1511 | ||
1512 | if (--res_list_elem->count == 0) { | |
1513 | list_del(&res_list_elem->resource_list); | |
1514 | kfree(res_list_elem); | |
1515 | } | |
1516 | return; | |
1517 | } | |
1518 | } | |
1519 | } | |
1520 | ||
1521 | acpi_status | |
1522 | acpi_os_invalidate_address( | |
1523 | u8 space_id, | |
1524 | acpi_physical_address address, | |
1525 | acpi_size length) | |
1526 | { | |
1527 | struct acpi_res_list res; | |
1528 | ||
1529 | switch (space_id) { | |
1530 | case ACPI_ADR_SPACE_SYSTEM_IO: | |
1531 | case ACPI_ADR_SPACE_SYSTEM_MEMORY: | |
88393161 | 1532 | /* Only interference checks against SystemIO and SystemMemory |
a5fe1a03 LM |
1533 | are needed */ |
1534 | res.start = address; | |
1535 | res.end = address + length - 1; | |
1536 | res.resource_type = space_id; | |
1537 | spin_lock(&acpi_res_lock); | |
1538 | acpi_res_list_del(&res); | |
1539 | spin_unlock(&acpi_res_lock); | |
1540 | break; | |
1541 | case ACPI_ADR_SPACE_PCI_CONFIG: | |
1542 | case ACPI_ADR_SPACE_EC: | |
1543 | case ACPI_ADR_SPACE_SMBUS: | |
1544 | case ACPI_ADR_SPACE_CMOS: | |
1545 | case ACPI_ADR_SPACE_PCI_BAR_TARGET: | |
1546 | case ACPI_ADR_SPACE_DATA_TABLE: | |
1547 | case ACPI_ADR_SPACE_FIXED_HARDWARE: | |
1548 | break; | |
1549 | } | |
1550 | return AE_OK; | |
1551 | } | |
1552 | ||
b229cf92 BM |
1553 | /****************************************************************************** |
1554 | * | |
1555 | * FUNCTION: acpi_os_validate_address | |
1556 | * | |
1557 | * PARAMETERS: space_id - ACPI space ID | |
1558 | * address - Physical address | |
1559 | * length - Address length | |
1560 | * | |
1561 | * RETURN: AE_OK if address/length is valid for the space_id. Otherwise, | |
1562 | * should return AE_AML_ILLEGAL_ADDRESS. | |
1563 | * | |
1564 | * DESCRIPTION: Validate a system address via the host OS. Used to validate | |
1565 | * the addresses accessed by AML operation regions. | |
1566 | * | |
1567 | *****************************************************************************/ | |
1568 | ||
1569 | acpi_status | |
1570 | acpi_os_validate_address ( | |
1571 | u8 space_id, | |
1572 | acpi_physical_address address, | |
df92e695 TR |
1573 | acpi_size length, |
1574 | char *name) | |
b229cf92 | 1575 | { |
df92e695 | 1576 | struct acpi_res_list *res; |
a5fe1a03 | 1577 | int added; |
df92e695 TR |
1578 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) |
1579 | return AE_OK; | |
b229cf92 | 1580 | |
df92e695 TR |
1581 | switch (space_id) { |
1582 | case ACPI_ADR_SPACE_SYSTEM_IO: | |
1583 | case ACPI_ADR_SPACE_SYSTEM_MEMORY: | |
88393161 | 1584 | /* Only interference checks against SystemIO and SystemMemory |
df92e695 TR |
1585 | are needed */ |
1586 | res = kzalloc(sizeof(struct acpi_res_list), GFP_KERNEL); | |
1587 | if (!res) | |
1588 | return AE_OK; | |
1589 | /* ACPI names are fixed to 4 bytes, still better use strlcpy */ | |
1590 | strlcpy(res->name, name, 5); | |
1591 | res->start = address; | |
1592 | res->end = address + length - 1; | |
1593 | res->resource_type = space_id; | |
1594 | spin_lock(&acpi_res_lock); | |
a5fe1a03 | 1595 | added = acpi_res_list_add(res); |
df92e695 | 1596 | spin_unlock(&acpi_res_lock); |
a5fe1a03 LM |
1597 | pr_debug("%s %s resource: start: 0x%llx, end: 0x%llx, " |
1598 | "name: %s\n", added ? "Added" : "Already exist", | |
1599 | (space_id == ACPI_ADR_SPACE_SYSTEM_IO) | |
df92e695 TR |
1600 | ? "SystemIO" : "System Memory", |
1601 | (unsigned long long)res->start, | |
1602 | (unsigned long long)res->end, | |
1603 | res->name); | |
a5fe1a03 LM |
1604 | if (!added) |
1605 | kfree(res); | |
df92e695 TR |
1606 | break; |
1607 | case ACPI_ADR_SPACE_PCI_CONFIG: | |
1608 | case ACPI_ADR_SPACE_EC: | |
1609 | case ACPI_ADR_SPACE_SMBUS: | |
1610 | case ACPI_ADR_SPACE_CMOS: | |
1611 | case ACPI_ADR_SPACE_PCI_BAR_TARGET: | |
1612 | case ACPI_ADR_SPACE_DATA_TABLE: | |
1613 | case ACPI_ADR_SPACE_FIXED_HARDWARE: | |
1614 | break; | |
1615 | } | |
1616 | return AE_OK; | |
b229cf92 | 1617 | } |
73459f73 | 1618 | #endif |
d362edaf MS |
1619 | |
1620 | acpi_status __init acpi_os_initialize(void) | |
1621 | { | |
1622 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
1623 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1624 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1625 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
1626 | ||
1627 | return AE_OK; | |
1628 | } | |
1629 | ||
32d47eef | 1630 | acpi_status __init acpi_os_initialize1(void) |
d362edaf | 1631 | { |
44d2588e TH |
1632 | kacpid_wq = alloc_workqueue("kacpid", 0, 1); |
1633 | kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1); | |
1634 | kacpi_hotplug_wq = alloc_workqueue("kacpi_hotplug", 0, 1); | |
d362edaf MS |
1635 | BUG_ON(!kacpid_wq); |
1636 | BUG_ON(!kacpi_notify_wq); | |
1637 | BUG_ON(!kacpi_hotplug_wq); | |
1bd64d42 LB |
1638 | acpi_install_interface_handler(acpi_osi_handler); |
1639 | acpi_osi_setup_late(); | |
d362edaf MS |
1640 | return AE_OK; |
1641 | } | |
1642 | ||
1643 | acpi_status acpi_os_terminate(void) | |
1644 | { | |
1645 | if (acpi_irq_handler) { | |
23fe3630 | 1646 | acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt, |
d362edaf MS |
1647 | acpi_irq_handler); |
1648 | } | |
1649 | ||
1650 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
1651 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1652 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1653 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
1654 | ||
1655 | destroy_workqueue(kacpid_wq); | |
1656 | destroy_workqueue(kacpi_notify_wq); | |
1657 | destroy_workqueue(kacpi_hotplug_wq); | |
1658 | ||
1659 | return AE_OK; | |
1660 | } |