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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> | |
7 | * | |
8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
23 | * | |
24 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
25 | * | |
26 | */ | |
27 | ||
1da177e4 LT |
28 | #include <linux/module.h> |
29 | #include <linux/kernel.h> | |
30 | #include <linux/slab.h> | |
31 | #include <linux/mm.h> | |
32 | #include <linux/pci.h> | |
33 | #include <linux/smp_lock.h> | |
34 | #include <linux/interrupt.h> | |
35 | #include <linux/kmod.h> | |
36 | #include <linux/delay.h> | |
37 | #include <linux/workqueue.h> | |
38 | #include <linux/nmi.h> | |
39 | #include <acpi/acpi.h> | |
40 | #include <asm/io.h> | |
41 | #include <acpi/acpi_bus.h> | |
42 | #include <acpi/processor.h> | |
43 | #include <asm/uaccess.h> | |
44 | ||
45 | #include <linux/efi.h> | |
46 | ||
1da177e4 | 47 | #define _COMPONENT ACPI_OS_SERVICES |
4be44fcd | 48 | ACPI_MODULE_NAME("osl") |
1da177e4 | 49 | #define PREFIX "ACPI: " |
4be44fcd LB |
50 | struct acpi_os_dpc { |
51 | acpi_osd_exec_callback function; | |
52 | void *context; | |
1da177e4 LT |
53 | }; |
54 | ||
55 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
56 | #include CONFIG_ACPI_CUSTOM_DSDT_FILE | |
57 | #endif | |
58 | ||
59 | #ifdef ENABLE_DEBUGGER | |
60 | #include <linux/kdb.h> | |
61 | ||
62 | /* stuff for debugger support */ | |
63 | int acpi_in_debugger; | |
64 | EXPORT_SYMBOL(acpi_in_debugger); | |
65 | ||
66 | extern char line_buf[80]; | |
4be44fcd | 67 | #endif /*ENABLE_DEBUGGER */ |
1da177e4 | 68 | |
30e332f3 | 69 | int acpi_specific_hotkey_enabled = TRUE; |
fb9802fa LY |
70 | EXPORT_SYMBOL(acpi_specific_hotkey_enabled); |
71 | ||
1da177e4 LT |
72 | static unsigned int acpi_irq_irq; |
73 | static acpi_osd_handler acpi_irq_handler; | |
74 | static void *acpi_irq_context; | |
75 | static struct workqueue_struct *kacpid_wq; | |
76 | ||
4be44fcd | 77 | acpi_status acpi_os_initialize(void) |
1da177e4 LT |
78 | { |
79 | return AE_OK; | |
80 | } | |
81 | ||
4be44fcd | 82 | acpi_status acpi_os_initialize1(void) |
1da177e4 LT |
83 | { |
84 | /* | |
85 | * Initialize PCI configuration space access, as we'll need to access | |
86 | * it while walking the namespace (bus 0 and root bridges w/ _BBNs). | |
87 | */ | |
1da177e4 | 88 | if (!raw_pci_ops) { |
4be44fcd LB |
89 | printk(KERN_ERR PREFIX |
90 | "Access to PCI configuration space unavailable\n"); | |
1da177e4 LT |
91 | return AE_NULL_ENTRY; |
92 | } | |
1da177e4 LT |
93 | kacpid_wq = create_singlethread_workqueue("kacpid"); |
94 | BUG_ON(!kacpid_wq); | |
b976fe19 | 95 | |
1da177e4 LT |
96 | return AE_OK; |
97 | } | |
98 | ||
4be44fcd | 99 | acpi_status acpi_os_terminate(void) |
1da177e4 LT |
100 | { |
101 | if (acpi_irq_handler) { | |
102 | acpi_os_remove_interrupt_handler(acpi_irq_irq, | |
103 | acpi_irq_handler); | |
104 | } | |
105 | ||
106 | destroy_workqueue(kacpid_wq); | |
107 | ||
108 | return AE_OK; | |
109 | } | |
110 | ||
4be44fcd | 111 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
112 | { |
113 | va_list args; | |
114 | va_start(args, fmt); | |
115 | acpi_os_vprintf(fmt, args); | |
116 | va_end(args); | |
117 | } | |
4be44fcd | 118 | |
1da177e4 LT |
119 | EXPORT_SYMBOL(acpi_os_printf); |
120 | ||
4be44fcd | 121 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
122 | { |
123 | static char buffer[512]; | |
4be44fcd | 124 | |
1da177e4 LT |
125 | vsprintf(buffer, fmt, args); |
126 | ||
127 | #ifdef ENABLE_DEBUGGER | |
128 | if (acpi_in_debugger) { | |
129 | kdb_printf("%s", buffer); | |
130 | } else { | |
131 | printk("%s", buffer); | |
132 | } | |
133 | #else | |
134 | printk("%s", buffer); | |
135 | #endif | |
136 | } | |
137 | ||
4be44fcd | 138 | acpi_status acpi_os_get_root_pointer(u32 flags, struct acpi_pointer *addr) |
1da177e4 LT |
139 | { |
140 | if (efi_enabled) { | |
141 | addr->pointer_type = ACPI_PHYSICAL_POINTER; | |
b2c99e3c BH |
142 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
143 | addr->pointer.physical = efi.acpi20; | |
144 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) | |
145 | addr->pointer.physical = efi.acpi; | |
1da177e4 | 146 | else { |
4be44fcd LB |
147 | printk(KERN_ERR PREFIX |
148 | "System description tables not found\n"); | |
1da177e4 LT |
149 | return AE_NOT_FOUND; |
150 | } | |
151 | } else { | |
152 | if (ACPI_FAILURE(acpi_find_root_pointer(flags, addr))) { | |
4be44fcd LB |
153 | printk(KERN_ERR PREFIX |
154 | "System description tables not found\n"); | |
1da177e4 LT |
155 | return AE_NOT_FOUND; |
156 | } | |
157 | } | |
158 | ||
159 | return AE_OK; | |
160 | } | |
161 | ||
162 | acpi_status | |
4be44fcd LB |
163 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size, |
164 | void __iomem ** virt) | |
1da177e4 | 165 | { |
9f4fd61f BH |
166 | if (phys > ULONG_MAX) { |
167 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
168 | return AE_BAD_PARAMETER; | |
1da177e4 | 169 | } |
9f4fd61f BH |
170 | /* |
171 | * ioremap checks to ensure this is in reserved space | |
172 | */ | |
173 | *virt = ioremap((unsigned long)phys, size); | |
1da177e4 LT |
174 | |
175 | if (!*virt) | |
176 | return AE_NO_MEMORY; | |
177 | ||
178 | return AE_OK; | |
179 | } | |
55a82ab3 | 180 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 181 | |
4be44fcd | 182 | void acpi_os_unmap_memory(void __iomem * virt, acpi_size size) |
1da177e4 LT |
183 | { |
184 | iounmap(virt); | |
185 | } | |
55a82ab3 | 186 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 LT |
187 | |
188 | #ifdef ACPI_FUTURE_USAGE | |
189 | acpi_status | |
4be44fcd | 190 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 191 | { |
4be44fcd | 192 | if (!phys || !virt) |
1da177e4 LT |
193 | return AE_BAD_PARAMETER; |
194 | ||
195 | *phys = virt_to_phys(virt); | |
196 | ||
197 | return AE_OK; | |
198 | } | |
199 | #endif | |
200 | ||
201 | #define ACPI_MAX_OVERRIDE_LEN 100 | |
202 | ||
203 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
204 | ||
205 | acpi_status | |
4be44fcd LB |
206 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
207 | acpi_string * new_val) | |
1da177e4 LT |
208 | { |
209 | if (!init_val || !new_val) | |
210 | return AE_BAD_PARAMETER; | |
211 | ||
212 | *new_val = NULL; | |
4be44fcd | 213 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 214 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 215 | acpi_os_name); |
1da177e4 LT |
216 | *new_val = acpi_os_name; |
217 | } | |
218 | ||
219 | return AE_OK; | |
220 | } | |
221 | ||
222 | acpi_status | |
4be44fcd LB |
223 | acpi_os_table_override(struct acpi_table_header * existing_table, |
224 | struct acpi_table_header ** new_table) | |
1da177e4 LT |
225 | { |
226 | if (!existing_table || !new_table) | |
227 | return AE_BAD_PARAMETER; | |
228 | ||
229 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
230 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
4be44fcd | 231 | *new_table = (struct acpi_table_header *)AmlCode; |
1da177e4 LT |
232 | else |
233 | *new_table = NULL; | |
234 | #else | |
235 | *new_table = NULL; | |
236 | #endif | |
237 | return AE_OK; | |
238 | } | |
239 | ||
7d12e780 | 240 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 241 | { |
4be44fcd | 242 | return (*acpi_irq_handler) (acpi_irq_context) ? IRQ_HANDLED : IRQ_NONE; |
1da177e4 LT |
243 | } |
244 | ||
245 | acpi_status | |
4be44fcd LB |
246 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
247 | void *context) | |
1da177e4 LT |
248 | { |
249 | unsigned int irq; | |
250 | ||
251 | /* | |
252 | * Ignore the GSI from the core, and use the value in our copy of the | |
253 | * FADT. It may not be the same if an interrupt source override exists | |
254 | * for the SCI. | |
255 | */ | |
256 | gsi = acpi_fadt.sci_int; | |
257 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { | |
258 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
259 | gsi); | |
260 | return AE_OK; | |
261 | } | |
262 | ||
263 | acpi_irq_handler = handler; | |
264 | acpi_irq_context = context; | |
dace1453 | 265 | if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
1da177e4 LT |
266 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
267 | return AE_NOT_ACQUIRED; | |
268 | } | |
269 | acpi_irq_irq = irq; | |
270 | ||
271 | return AE_OK; | |
272 | } | |
273 | ||
4be44fcd | 274 | acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) |
1da177e4 LT |
275 | { |
276 | if (irq) { | |
277 | free_irq(irq, acpi_irq); | |
278 | acpi_irq_handler = NULL; | |
279 | acpi_irq_irq = 0; | |
280 | } | |
281 | ||
282 | return AE_OK; | |
283 | } | |
284 | ||
285 | /* | |
286 | * Running in interpreter thread context, safe to sleep | |
287 | */ | |
288 | ||
4be44fcd | 289 | void acpi_os_sleep(acpi_integer ms) |
1da177e4 | 290 | { |
01a527ec | 291 | schedule_timeout_interruptible(msecs_to_jiffies(ms)); |
1da177e4 | 292 | } |
4be44fcd | 293 | |
1da177e4 LT |
294 | EXPORT_SYMBOL(acpi_os_sleep); |
295 | ||
4be44fcd | 296 | void acpi_os_stall(u32 us) |
1da177e4 LT |
297 | { |
298 | while (us) { | |
299 | u32 delay = 1000; | |
300 | ||
301 | if (delay > us) | |
302 | delay = us; | |
303 | udelay(delay); | |
304 | touch_nmi_watchdog(); | |
305 | us -= delay; | |
306 | } | |
307 | } | |
4be44fcd | 308 | |
1da177e4 LT |
309 | EXPORT_SYMBOL(acpi_os_stall); |
310 | ||
311 | /* | |
312 | * Support ACPI 3.0 AML Timer operand | |
313 | * Returns 64-bit free-running, monotonically increasing timer | |
314 | * with 100ns granularity | |
315 | */ | |
4be44fcd | 316 | u64 acpi_os_get_timer(void) |
1da177e4 LT |
317 | { |
318 | static u64 t; | |
319 | ||
320 | #ifdef CONFIG_HPET | |
321 | /* TBD: use HPET if available */ | |
322 | #endif | |
323 | ||
324 | #ifdef CONFIG_X86_PM_TIMER | |
325 | /* TBD: default to PM timer if HPET was not available */ | |
326 | #endif | |
327 | if (!t) | |
328 | printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n"); | |
329 | ||
330 | return ++t; | |
331 | } | |
332 | ||
4be44fcd | 333 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
334 | { |
335 | u32 dummy; | |
336 | ||
337 | if (!value) | |
338 | value = &dummy; | |
339 | ||
4be44fcd | 340 | switch (width) { |
1da177e4 | 341 | case 8: |
4be44fcd | 342 | *(u8 *) value = inb(port); |
1da177e4 LT |
343 | break; |
344 | case 16: | |
4be44fcd | 345 | *(u16 *) value = inw(port); |
1da177e4 LT |
346 | break; |
347 | case 32: | |
4be44fcd | 348 | *(u32 *) value = inl(port); |
1da177e4 LT |
349 | break; |
350 | default: | |
351 | BUG(); | |
352 | } | |
353 | ||
354 | return AE_OK; | |
355 | } | |
4be44fcd | 356 | |
1da177e4 LT |
357 | EXPORT_SYMBOL(acpi_os_read_port); |
358 | ||
4be44fcd | 359 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 360 | { |
4be44fcd | 361 | switch (width) { |
1da177e4 LT |
362 | case 8: |
363 | outb(value, port); | |
364 | break; | |
365 | case 16: | |
366 | outw(value, port); | |
367 | break; | |
368 | case 32: | |
369 | outl(value, port); | |
370 | break; | |
371 | default: | |
372 | BUG(); | |
373 | } | |
374 | ||
375 | return AE_OK; | |
376 | } | |
4be44fcd | 377 | |
1da177e4 LT |
378 | EXPORT_SYMBOL(acpi_os_write_port); |
379 | ||
380 | acpi_status | |
4be44fcd | 381 | acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width) |
1da177e4 | 382 | { |
4be44fcd LB |
383 | u32 dummy; |
384 | void __iomem *virt_addr; | |
1da177e4 | 385 | |
9f4fd61f | 386 | virt_addr = ioremap(phys_addr, width); |
1da177e4 LT |
387 | if (!value) |
388 | value = &dummy; | |
389 | ||
390 | switch (width) { | |
391 | case 8: | |
4be44fcd | 392 | *(u8 *) value = readb(virt_addr); |
1da177e4 LT |
393 | break; |
394 | case 16: | |
4be44fcd | 395 | *(u16 *) value = readw(virt_addr); |
1da177e4 LT |
396 | break; |
397 | case 32: | |
4be44fcd | 398 | *(u32 *) value = readl(virt_addr); |
1da177e4 LT |
399 | break; |
400 | default: | |
401 | BUG(); | |
402 | } | |
403 | ||
9f4fd61f | 404 | iounmap(virt_addr); |
1da177e4 LT |
405 | |
406 | return AE_OK; | |
407 | } | |
408 | ||
409 | acpi_status | |
4be44fcd | 410 | acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width) |
1da177e4 | 411 | { |
4be44fcd | 412 | void __iomem *virt_addr; |
1da177e4 | 413 | |
9f4fd61f | 414 | virt_addr = ioremap(phys_addr, width); |
1da177e4 LT |
415 | |
416 | switch (width) { | |
417 | case 8: | |
418 | writeb(value, virt_addr); | |
419 | break; | |
420 | case 16: | |
421 | writew(value, virt_addr); | |
422 | break; | |
423 | case 32: | |
424 | writel(value, virt_addr); | |
425 | break; | |
426 | default: | |
427 | BUG(); | |
428 | } | |
429 | ||
9f4fd61f | 430 | iounmap(virt_addr); |
1da177e4 LT |
431 | |
432 | return AE_OK; | |
433 | } | |
434 | ||
1da177e4 | 435 | acpi_status |
4be44fcd LB |
436 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
437 | void *value, u32 width) | |
1da177e4 LT |
438 | { |
439 | int result, size; | |
440 | ||
441 | if (!value) | |
442 | return AE_BAD_PARAMETER; | |
443 | ||
444 | switch (width) { | |
445 | case 8: | |
446 | size = 1; | |
447 | break; | |
448 | case 16: | |
449 | size = 2; | |
450 | break; | |
451 | case 32: | |
452 | size = 4; | |
453 | break; | |
454 | default: | |
455 | return AE_ERROR; | |
456 | } | |
457 | ||
458 | BUG_ON(!raw_pci_ops); | |
459 | ||
460 | result = raw_pci_ops->read(pci_id->segment, pci_id->bus, | |
4be44fcd LB |
461 | PCI_DEVFN(pci_id->device, pci_id->function), |
462 | reg, size, value); | |
1da177e4 LT |
463 | |
464 | return (result ? AE_ERROR : AE_OK); | |
465 | } | |
4be44fcd | 466 | |
1da177e4 LT |
467 | EXPORT_SYMBOL(acpi_os_read_pci_configuration); |
468 | ||
469 | acpi_status | |
4be44fcd LB |
470 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
471 | acpi_integer value, u32 width) | |
1da177e4 LT |
472 | { |
473 | int result, size; | |
474 | ||
475 | switch (width) { | |
476 | case 8: | |
477 | size = 1; | |
478 | break; | |
479 | case 16: | |
480 | size = 2; | |
481 | break; | |
482 | case 32: | |
483 | size = 4; | |
484 | break; | |
485 | default: | |
486 | return AE_ERROR; | |
487 | } | |
488 | ||
489 | BUG_ON(!raw_pci_ops); | |
490 | ||
491 | result = raw_pci_ops->write(pci_id->segment, pci_id->bus, | |
4be44fcd LB |
492 | PCI_DEVFN(pci_id->device, pci_id->function), |
493 | reg, size, value); | |
1da177e4 LT |
494 | |
495 | return (result ? AE_ERROR : AE_OK); | |
496 | } | |
497 | ||
498 | /* TODO: Change code to take advantage of driver model more */ | |
4be44fcd LB |
499 | static void acpi_os_derive_pci_id_2(acpi_handle rhandle, /* upper bound */ |
500 | acpi_handle chandle, /* current node */ | |
501 | struct acpi_pci_id **id, | |
502 | int *is_bridge, u8 * bus_number) | |
1da177e4 | 503 | { |
4be44fcd LB |
504 | acpi_handle handle; |
505 | struct acpi_pci_id *pci_id = *id; | |
506 | acpi_status status; | |
507 | unsigned long temp; | |
508 | acpi_object_type type; | |
509 | u8 tu8; | |
1da177e4 LT |
510 | |
511 | acpi_get_parent(chandle, &handle); | |
512 | if (handle != rhandle) { | |
4be44fcd LB |
513 | acpi_os_derive_pci_id_2(rhandle, handle, &pci_id, is_bridge, |
514 | bus_number); | |
1da177e4 LT |
515 | |
516 | status = acpi_get_type(handle, &type); | |
4be44fcd | 517 | if ((ACPI_FAILURE(status)) || (type != ACPI_TYPE_DEVICE)) |
1da177e4 LT |
518 | return; |
519 | ||
4be44fcd LB |
520 | status = |
521 | acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, | |
522 | &temp); | |
1da177e4 | 523 | if (ACPI_SUCCESS(status)) { |
4be44fcd LB |
524 | pci_id->device = ACPI_HIWORD(ACPI_LODWORD(temp)); |
525 | pci_id->function = ACPI_LOWORD(ACPI_LODWORD(temp)); | |
1da177e4 LT |
526 | |
527 | if (*is_bridge) | |
528 | pci_id->bus = *bus_number; | |
529 | ||
530 | /* any nicer way to get bus number of bridge ? */ | |
4be44fcd LB |
531 | status = |
532 | acpi_os_read_pci_configuration(pci_id, 0x0e, &tu8, | |
533 | 8); | |
534 | if (ACPI_SUCCESS(status) | |
535 | && ((tu8 & 0x7f) == 1 || (tu8 & 0x7f) == 2)) { | |
536 | status = | |
537 | acpi_os_read_pci_configuration(pci_id, 0x18, | |
538 | &tu8, 8); | |
1da177e4 LT |
539 | if (!ACPI_SUCCESS(status)) { |
540 | /* Certainly broken... FIX ME */ | |
541 | return; | |
542 | } | |
543 | *is_bridge = 1; | |
544 | pci_id->bus = tu8; | |
4be44fcd LB |
545 | status = |
546 | acpi_os_read_pci_configuration(pci_id, 0x19, | |
547 | &tu8, 8); | |
1da177e4 LT |
548 | if (ACPI_SUCCESS(status)) { |
549 | *bus_number = tu8; | |
550 | } | |
551 | } else | |
552 | *is_bridge = 0; | |
553 | } | |
554 | } | |
555 | } | |
556 | ||
4be44fcd LB |
557 | void acpi_os_derive_pci_id(acpi_handle rhandle, /* upper bound */ |
558 | acpi_handle chandle, /* current node */ | |
559 | struct acpi_pci_id **id) | |
1da177e4 LT |
560 | { |
561 | int is_bridge = 1; | |
562 | u8 bus_number = (*id)->bus; | |
563 | ||
564 | acpi_os_derive_pci_id_2(rhandle, chandle, id, &is_bridge, &bus_number); | |
565 | } | |
566 | ||
4be44fcd | 567 | static void acpi_os_execute_deferred(void *context) |
1da177e4 | 568 | { |
b976fe19 LT |
569 | struct acpi_os_dpc *dpc = NULL; |
570 | ||
571 | ||
572 | dpc = (struct acpi_os_dpc *)context; | |
1da177e4 | 573 | if (!dpc) { |
6468463a | 574 | printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); |
d550d98d | 575 | return; |
1da177e4 LT |
576 | } |
577 | ||
578 | dpc->function(dpc->context); | |
579 | ||
580 | kfree(dpc); | |
581 | ||
d550d98d | 582 | return; |
1da177e4 LT |
583 | } |
584 | ||
b8d35192 AS |
585 | /******************************************************************************* |
586 | * | |
587 | * FUNCTION: acpi_os_execute | |
588 | * | |
589 | * PARAMETERS: Type - Type of the callback | |
590 | * Function - Function to be executed | |
591 | * Context - Function parameters | |
592 | * | |
593 | * RETURN: Status | |
594 | * | |
595 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
596 | * immediately executes function on a separate thread. | |
597 | * | |
598 | ******************************************************************************/ | |
599 | ||
600 | acpi_status acpi_os_execute(acpi_execute_type type, | |
4be44fcd | 601 | acpi_osd_exec_callback function, void *context) |
1da177e4 | 602 | { |
4be44fcd LB |
603 | acpi_status status = AE_OK; |
604 | struct acpi_os_dpc *dpc; | |
605 | struct work_struct *task; | |
72945b2b | 606 | |
b976fe19 LT |
607 | ACPI_FUNCTION_TRACE("os_queue_for_execution"); |
608 | ||
72945b2b LB |
609 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
610 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
611 | function, context)); | |
1da177e4 LT |
612 | |
613 | if (!function) | |
b976fe19 | 614 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
72945b2b | 615 | |
1da177e4 LT |
616 | /* |
617 | * Allocate/initialize DPC structure. Note that this memory will be | |
618 | * freed by the callee. The kernel handles the tq_struct list in a | |
619 | * way that allows us to also free its memory inside the callee. | |
620 | * Because we may want to schedule several tasks with different | |
621 | * parameters we can't use the approach some kernel code uses of | |
622 | * having a static tq_struct. | |
623 | * We can save time and code by allocating the DPC and tq_structs | |
624 | * from the same memory. | |
625 | */ | |
72945b2b | 626 | |
b976fe19 LT |
627 | dpc = |
628 | kmalloc(sizeof(struct acpi_os_dpc) + sizeof(struct work_struct), | |
629 | GFP_ATOMIC); | |
1da177e4 | 630 | if (!dpc) |
b976fe19 LT |
631 | return_ACPI_STATUS(AE_NO_MEMORY); |
632 | ||
1da177e4 LT |
633 | dpc->function = function; |
634 | dpc->context = context; | |
b976fe19 | 635 | |
72945b2b LB |
636 | task = (void *)(dpc + 1); |
637 | INIT_WORK(task, acpi_os_execute_deferred, (void *)dpc); | |
b976fe19 LT |
638 | |
639 | if (!queue_work(kacpid_wq, task)) { | |
640 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
641 | "Call to queue_work() failed.\n")); | |
37605a69 | 642 | kfree(dpc); |
b976fe19 | 643 | status = AE_ERROR; |
1da177e4 | 644 | } |
b976fe19 LT |
645 | |
646 | return_ACPI_STATUS(status); | |
1da177e4 | 647 | } |
4be44fcd | 648 | |
b8d35192 | 649 | EXPORT_SYMBOL(acpi_os_execute); |
1da177e4 | 650 | |
4be44fcd | 651 | void acpi_os_wait_events_complete(void *context) |
1da177e4 LT |
652 | { |
653 | flush_workqueue(kacpid_wq); | |
654 | } | |
4be44fcd | 655 | |
1da177e4 LT |
656 | EXPORT_SYMBOL(acpi_os_wait_events_complete); |
657 | ||
658 | /* | |
659 | * Allocate the memory for a spinlock and initialize it. | |
660 | */ | |
967440e3 | 661 | acpi_status acpi_os_create_lock(acpi_spinlock * handle) |
1da177e4 | 662 | { |
967440e3 | 663 | spin_lock_init(*handle); |
1da177e4 | 664 | |
d550d98d | 665 | return AE_OK; |
1da177e4 LT |
666 | } |
667 | ||
1da177e4 LT |
668 | /* |
669 | * Deallocate the memory for a spinlock. | |
670 | */ | |
967440e3 | 671 | void acpi_os_delete_lock(acpi_spinlock handle) |
1da177e4 | 672 | { |
d550d98d | 673 | return; |
1da177e4 LT |
674 | } |
675 | ||
1da177e4 | 676 | acpi_status |
4be44fcd | 677 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 678 | { |
4be44fcd | 679 | struct semaphore *sem = NULL; |
1da177e4 | 680 | |
1da177e4 LT |
681 | |
682 | sem = acpi_os_allocate(sizeof(struct semaphore)); | |
683 | if (!sem) | |
d550d98d | 684 | return AE_NO_MEMORY; |
1da177e4 LT |
685 | memset(sem, 0, sizeof(struct semaphore)); |
686 | ||
687 | sema_init(sem, initial_units); | |
688 | ||
4be44fcd | 689 | *handle = (acpi_handle *) sem; |
1da177e4 | 690 | |
4be44fcd LB |
691 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
692 | *handle, initial_units)); | |
1da177e4 | 693 | |
d550d98d | 694 | return AE_OK; |
1da177e4 | 695 | } |
1da177e4 | 696 | |
4be44fcd | 697 | EXPORT_SYMBOL(acpi_os_create_semaphore); |
1da177e4 LT |
698 | |
699 | /* | |
700 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
701 | * 'delete_semaphore()' function -- may result in an invalid | |
702 | * pointer dereference for non-synchronized consumers. Should | |
703 | * we at least check for blocked threads and signal/cancel them? | |
704 | */ | |
705 | ||
4be44fcd | 706 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 707 | { |
4be44fcd | 708 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 709 | |
1da177e4 LT |
710 | |
711 | if (!sem) | |
d550d98d | 712 | return AE_BAD_PARAMETER; |
1da177e4 | 713 | |
4be44fcd | 714 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 715 | |
02438d87 | 716 | kfree(sem); |
4be44fcd | 717 | sem = NULL; |
1da177e4 | 718 | |
d550d98d | 719 | return AE_OK; |
1da177e4 | 720 | } |
1da177e4 | 721 | |
4be44fcd | 722 | EXPORT_SYMBOL(acpi_os_delete_semaphore); |
1da177e4 LT |
723 | |
724 | /* | |
725 | * TODO: The kernel doesn't have a 'down_timeout' function -- had to | |
726 | * improvise. The process is to sleep for one scheduler quantum | |
727 | * until the semaphore becomes available. Downside is that this | |
728 | * may result in starvation for timeout-based waits when there's | |
729 | * lots of semaphore activity. | |
730 | * | |
731 | * TODO: Support for units > 1? | |
732 | */ | |
4be44fcd | 733 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 734 | { |
4be44fcd LB |
735 | acpi_status status = AE_OK; |
736 | struct semaphore *sem = (struct semaphore *)handle; | |
737 | int ret = 0; | |
1da177e4 | 738 | |
1da177e4 LT |
739 | |
740 | if (!sem || (units < 1)) | |
d550d98d | 741 | return AE_BAD_PARAMETER; |
1da177e4 LT |
742 | |
743 | if (units > 1) | |
d550d98d | 744 | return AE_SUPPORT; |
1da177e4 | 745 | |
4be44fcd LB |
746 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
747 | handle, units, timeout)); | |
1da177e4 | 748 | |
d68909f4 LB |
749 | /* |
750 | * This can be called during resume with interrupts off. | |
751 | * Like boot-time, we should be single threaded and will | |
752 | * always get the lock if we try -- timeout or not. | |
753 | * If this doesn't succeed, then we will oops courtesy of | |
754 | * might_sleep() in down(). | |
755 | */ | |
756 | if (!down_trylock(sem)) | |
757 | return AE_OK; | |
758 | ||
4be44fcd | 759 | switch (timeout) { |
1da177e4 LT |
760 | /* |
761 | * No Wait: | |
762 | * -------- | |
763 | * A zero timeout value indicates that we shouldn't wait - just | |
764 | * acquire the semaphore if available otherwise return AE_TIME | |
765 | * (a.k.a. 'would block'). | |
766 | */ | |
4be44fcd LB |
767 | case 0: |
768 | if (down_trylock(sem)) | |
1da177e4 LT |
769 | status = AE_TIME; |
770 | break; | |
771 | ||
772 | /* | |
773 | * Wait Indefinitely: | |
774 | * ------------------ | |
775 | */ | |
4be44fcd | 776 | case ACPI_WAIT_FOREVER: |
1da177e4 LT |
777 | down(sem); |
778 | break; | |
779 | ||
780 | /* | |
781 | * Wait w/ Timeout: | |
782 | * ---------------- | |
783 | */ | |
4be44fcd | 784 | default: |
1da177e4 LT |
785 | // TODO: A better timeout algorithm? |
786 | { | |
787 | int i = 0; | |
4be44fcd | 788 | static const int quantum_ms = 1000 / HZ; |
1da177e4 LT |
789 | |
790 | ret = down_trylock(sem); | |
dacd9b80 | 791 | for (i = timeout; (i > 0 && ret != 0); i -= quantum_ms) { |
01a527ec | 792 | schedule_timeout_interruptible(1); |
1da177e4 LT |
793 | ret = down_trylock(sem); |
794 | } | |
4be44fcd | 795 | |
1da177e4 LT |
796 | if (ret != 0) |
797 | status = AE_TIME; | |
798 | } | |
799 | break; | |
800 | } | |
801 | ||
802 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 803 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 804 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
805 | handle, units, timeout, |
806 | acpi_format_exception(status))); | |
807 | } else { | |
808 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 809 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 810 | units, timeout)); |
1da177e4 LT |
811 | } |
812 | ||
d550d98d | 813 | return status; |
1da177e4 | 814 | } |
1da177e4 | 815 | |
4be44fcd | 816 | EXPORT_SYMBOL(acpi_os_wait_semaphore); |
1da177e4 LT |
817 | |
818 | /* | |
819 | * TODO: Support for units > 1? | |
820 | */ | |
4be44fcd | 821 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 822 | { |
4be44fcd | 823 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 824 | |
1da177e4 LT |
825 | |
826 | if (!sem || (units < 1)) | |
d550d98d | 827 | return AE_BAD_PARAMETER; |
1da177e4 LT |
828 | |
829 | if (units > 1) | |
d550d98d | 830 | return AE_SUPPORT; |
1da177e4 | 831 | |
4be44fcd LB |
832 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
833 | units)); | |
1da177e4 LT |
834 | |
835 | up(sem); | |
836 | ||
d550d98d | 837 | return AE_OK; |
1da177e4 | 838 | } |
4be44fcd | 839 | |
1da177e4 LT |
840 | EXPORT_SYMBOL(acpi_os_signal_semaphore); |
841 | ||
842 | #ifdef ACPI_FUTURE_USAGE | |
4be44fcd | 843 | u32 acpi_os_get_line(char *buffer) |
1da177e4 LT |
844 | { |
845 | ||
846 | #ifdef ENABLE_DEBUGGER | |
847 | if (acpi_in_debugger) { | |
848 | u32 chars; | |
849 | ||
850 | kdb_read(buffer, sizeof(line_buf)); | |
851 | ||
852 | /* remove the CR kdb includes */ | |
853 | chars = strlen(buffer) - 1; | |
854 | buffer[chars] = '\0'; | |
855 | } | |
856 | #endif | |
857 | ||
858 | return 0; | |
859 | } | |
4be44fcd | 860 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 LT |
861 | |
862 | /* Assumes no unreadable holes inbetween */ | |
4be44fcd | 863 | u8 acpi_os_readable(void *ptr, acpi_size len) |
1da177e4 | 864 | { |
4be44fcd | 865 | #if defined(__i386__) || defined(__x86_64__) |
1da177e4 | 866 | char tmp; |
4be44fcd LB |
867 | return !__get_user(tmp, (char __user *)ptr) |
868 | && !__get_user(tmp, (char __user *)ptr + len - 1); | |
1da177e4 LT |
869 | #endif |
870 | return 1; | |
871 | } | |
872 | ||
873 | #ifdef ACPI_FUTURE_USAGE | |
4be44fcd | 874 | u8 acpi_os_writable(void *ptr, acpi_size len) |
1da177e4 LT |
875 | { |
876 | /* could do dummy write (racy) or a kernel page table lookup. | |
877 | The later may be difficult at early boot when kmap doesn't work yet. */ | |
878 | return 1; | |
879 | } | |
880 | #endif | |
881 | ||
4be44fcd | 882 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 883 | { |
4be44fcd | 884 | switch (function) { |
1da177e4 LT |
885 | case ACPI_SIGNAL_FATAL: |
886 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
887 | break; | |
888 | case ACPI_SIGNAL_BREAKPOINT: | |
889 | /* | |
890 | * AML Breakpoint | |
891 | * ACPI spec. says to treat it as a NOP unless | |
892 | * you are debugging. So if/when we integrate | |
893 | * AML debugger into the kernel debugger its | |
894 | * hook will go here. But until then it is | |
895 | * not useful to print anything on breakpoints. | |
896 | */ | |
897 | break; | |
898 | default: | |
899 | break; | |
900 | } | |
901 | ||
902 | return AE_OK; | |
903 | } | |
4be44fcd | 904 | |
1da177e4 LT |
905 | EXPORT_SYMBOL(acpi_os_signal); |
906 | ||
4be44fcd | 907 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
908 | { |
909 | char *p = acpi_os_name; | |
4be44fcd | 910 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
911 | |
912 | if (!str || !*str) | |
913 | return 0; | |
914 | ||
915 | for (; count-- && str && *str; str++) { | |
916 | if (isalnum(*str) || *str == ' ' || *str == ':') | |
917 | *p++ = *str; | |
918 | else if (*str == '\'' || *str == '"') | |
919 | continue; | |
920 | else | |
921 | break; | |
922 | } | |
923 | *p = 0; | |
924 | ||
925 | return 1; | |
4be44fcd | 926 | |
1da177e4 LT |
927 | } |
928 | ||
929 | __setup("acpi_os_name=", acpi_os_name_setup); | |
930 | ||
931 | /* | |
932 | * _OSI control | |
933 | * empty string disables _OSI | |
934 | * TBD additional string adds to _OSI | |
935 | */ | |
4be44fcd | 936 | static int __init acpi_osi_setup(char *str) |
1da177e4 LT |
937 | { |
938 | if (str == NULL || *str == '\0') { | |
939 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
940 | acpi_gbl_create_osi_method = FALSE; | |
4be44fcd | 941 | } else { |
1da177e4 | 942 | /* TBD */ |
4be44fcd LB |
943 | printk(KERN_ERR PREFIX "_OSI additional string ignored -- %s\n", |
944 | str); | |
1da177e4 LT |
945 | } |
946 | ||
947 | return 1; | |
948 | } | |
949 | ||
950 | __setup("acpi_osi=", acpi_osi_setup); | |
951 | ||
952 | /* enable serialization to combat AE_ALREADY_EXISTS errors */ | |
4be44fcd | 953 | static int __init acpi_serialize_setup(char *str) |
1da177e4 LT |
954 | { |
955 | printk(KERN_INFO PREFIX "serialize enabled\n"); | |
956 | ||
957 | acpi_gbl_all_methods_serialized = TRUE; | |
958 | ||
959 | return 1; | |
960 | } | |
961 | ||
962 | __setup("acpi_serialize", acpi_serialize_setup); | |
963 | ||
964 | /* | |
965 | * Wake and Run-Time GPES are expected to be separate. | |
966 | * We disable wake-GPEs at run-time to prevent spurious | |
967 | * interrupts. | |
968 | * | |
969 | * However, if a system exists that shares Wake and | |
970 | * Run-time events on the same GPE this flag is available | |
971 | * to tell Linux to keep the wake-time GPEs enabled at run-time. | |
972 | */ | |
4be44fcd | 973 | static int __init acpi_wake_gpes_always_on_setup(char *str) |
1da177e4 LT |
974 | { |
975 | printk(KERN_INFO PREFIX "wake GPEs not disabled\n"); | |
976 | ||
977 | acpi_gbl_leave_wake_gpes_disabled = FALSE; | |
978 | ||
979 | return 1; | |
980 | } | |
981 | ||
982 | __setup("acpi_wake_gpes_always_on", acpi_wake_gpes_always_on_setup); | |
983 | ||
8713cbef | 984 | static int __init acpi_hotkey_setup(char *str) |
fb9802fa | 985 | { |
30e332f3 | 986 | acpi_specific_hotkey_enabled = FALSE; |
fb9802fa LY |
987 | return 1; |
988 | } | |
989 | ||
30e332f3 | 990 | __setup("acpi_generic_hotkey", acpi_hotkey_setup); |
fb9802fa | 991 | |
1da177e4 LT |
992 | /* |
993 | * max_cstate is defined in the base kernel so modules can | |
994 | * change it w/o depending on the state of the processor module. | |
995 | */ | |
996 | unsigned int max_cstate = ACPI_PROCESSOR_MAX_POWER; | |
997 | ||
1da177e4 | 998 | EXPORT_SYMBOL(max_cstate); |
73459f73 RM |
999 | |
1000 | /* | |
1001 | * Acquire a spinlock. | |
1002 | * | |
1003 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1004 | */ |
1005 | ||
967440e3 | 1006 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 1007 | { |
b8e4d893 | 1008 | acpi_cpu_flags flags; |
967440e3 | 1009 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
1010 | return flags; |
1011 | } | |
1012 | ||
1013 | /* | |
1014 | * Release a spinlock. See above. | |
1015 | */ | |
1016 | ||
967440e3 | 1017 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 1018 | { |
967440e3 | 1019 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
1020 | } |
1021 | ||
73459f73 RM |
1022 | #ifndef ACPI_USE_LOCAL_CACHE |
1023 | ||
1024 | /******************************************************************************* | |
1025 | * | |
1026 | * FUNCTION: acpi_os_create_cache | |
1027 | * | |
b229cf92 BM |
1028 | * PARAMETERS: name - Ascii name for the cache |
1029 | * size - Size of each cached object | |
1030 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1031 | * cache - Where the new cache object is returned | |
73459f73 | 1032 | * |
b229cf92 | 1033 | * RETURN: status |
73459f73 RM |
1034 | * |
1035 | * DESCRIPTION: Create a cache object | |
1036 | * | |
1037 | ******************************************************************************/ | |
1038 | ||
1039 | acpi_status | |
4be44fcd | 1040 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1041 | { |
4be44fcd | 1042 | *cache = kmem_cache_create(name, size, 0, 0, NULL, NULL); |
b229cf92 BM |
1043 | if (cache == NULL) |
1044 | return AE_ERROR; | |
1045 | else | |
1046 | return AE_OK; | |
73459f73 RM |
1047 | } |
1048 | ||
1049 | /******************************************************************************* | |
1050 | * | |
1051 | * FUNCTION: acpi_os_purge_cache | |
1052 | * | |
1053 | * PARAMETERS: Cache - Handle to cache object | |
1054 | * | |
1055 | * RETURN: Status | |
1056 | * | |
1057 | * DESCRIPTION: Free all objects within the requested cache. | |
1058 | * | |
1059 | ******************************************************************************/ | |
1060 | ||
4be44fcd | 1061 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1062 | { |
4be44fcd LB |
1063 | (void)kmem_cache_shrink(cache); |
1064 | return (AE_OK); | |
73459f73 RM |
1065 | } |
1066 | ||
1067 | /******************************************************************************* | |
1068 | * | |
1069 | * FUNCTION: acpi_os_delete_cache | |
1070 | * | |
1071 | * PARAMETERS: Cache - Handle to cache object | |
1072 | * | |
1073 | * RETURN: Status | |
1074 | * | |
1075 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1076 | * cache object. | |
1077 | * | |
1078 | ******************************************************************************/ | |
1079 | ||
4be44fcd | 1080 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1081 | { |
1a1d92c1 | 1082 | kmem_cache_destroy(cache); |
4be44fcd | 1083 | return (AE_OK); |
73459f73 RM |
1084 | } |
1085 | ||
1086 | /******************************************************************************* | |
1087 | * | |
1088 | * FUNCTION: acpi_os_release_object | |
1089 | * | |
1090 | * PARAMETERS: Cache - Handle to cache object | |
1091 | * Object - The object to be released | |
1092 | * | |
1093 | * RETURN: None | |
1094 | * | |
1095 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1096 | * the object is deleted. | |
1097 | * | |
1098 | ******************************************************************************/ | |
1099 | ||
4be44fcd | 1100 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1101 | { |
4be44fcd LB |
1102 | kmem_cache_free(cache, object); |
1103 | return (AE_OK); | |
73459f73 RM |
1104 | } |
1105 | ||
b229cf92 BM |
1106 | /****************************************************************************** |
1107 | * | |
1108 | * FUNCTION: acpi_os_validate_interface | |
1109 | * | |
1110 | * PARAMETERS: interface - Requested interface to be validated | |
1111 | * | |
1112 | * RETURN: AE_OK if interface is supported, AE_SUPPORT otherwise | |
1113 | * | |
1114 | * DESCRIPTION: Match an interface string to the interfaces supported by the | |
1115 | * host. Strings originate from an AML call to the _OSI method. | |
1116 | * | |
1117 | *****************************************************************************/ | |
1118 | ||
1119 | acpi_status | |
1120 | acpi_os_validate_interface (char *interface) | |
1121 | { | |
1122 | ||
1123 | return AE_SUPPORT; | |
1124 | } | |
1125 | ||
1126 | ||
1127 | /****************************************************************************** | |
1128 | * | |
1129 | * FUNCTION: acpi_os_validate_address | |
1130 | * | |
1131 | * PARAMETERS: space_id - ACPI space ID | |
1132 | * address - Physical address | |
1133 | * length - Address length | |
1134 | * | |
1135 | * RETURN: AE_OK if address/length is valid for the space_id. Otherwise, | |
1136 | * should return AE_AML_ILLEGAL_ADDRESS. | |
1137 | * | |
1138 | * DESCRIPTION: Validate a system address via the host OS. Used to validate | |
1139 | * the addresses accessed by AML operation regions. | |
1140 | * | |
1141 | *****************************************************************************/ | |
1142 | ||
1143 | acpi_status | |
1144 | acpi_os_validate_address ( | |
1145 | u8 space_id, | |
1146 | acpi_physical_address address, | |
1147 | acpi_size length) | |
1148 | { | |
1149 | ||
1150 | return AE_OK; | |
1151 | } | |
1152 | ||
1153 | ||
73459f73 | 1154 | #endif |