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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 | ||
28 | #include <linux/config.h> | |
29 | #include <linux/module.h> | |
30 | #include <linux/kernel.h> | |
31 | #include <linux/slab.h> | |
32 | #include <linux/mm.h> | |
33 | #include <linux/pci.h> | |
34 | #include <linux/smp_lock.h> | |
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> | |
b8d35192 | 40 | #include <linux/kthread.h> |
1da177e4 LT |
41 | #include <acpi/acpi.h> |
42 | #include <asm/io.h> | |
43 | #include <acpi/acpi_bus.h> | |
44 | #include <acpi/processor.h> | |
45 | #include <asm/uaccess.h> | |
46 | ||
47 | #include <linux/efi.h> | |
48 | ||
1da177e4 | 49 | #define _COMPONENT ACPI_OS_SERVICES |
4be44fcd | 50 | ACPI_MODULE_NAME("osl") |
1da177e4 | 51 | #define PREFIX "ACPI: " |
4be44fcd LB |
52 | struct acpi_os_dpc { |
53 | acpi_osd_exec_callback function; | |
54 | void *context; | |
1da177e4 LT |
55 | }; |
56 | ||
57 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
58 | #include CONFIG_ACPI_CUSTOM_DSDT_FILE | |
59 | #endif | |
60 | ||
61 | #ifdef ENABLE_DEBUGGER | |
62 | #include <linux/kdb.h> | |
63 | ||
64 | /* stuff for debugger support */ | |
65 | int acpi_in_debugger; | |
66 | EXPORT_SYMBOL(acpi_in_debugger); | |
67 | ||
68 | extern char line_buf[80]; | |
4be44fcd | 69 | #endif /*ENABLE_DEBUGGER */ |
1da177e4 | 70 | |
30e332f3 | 71 | int acpi_specific_hotkey_enabled = TRUE; |
fb9802fa LY |
72 | EXPORT_SYMBOL(acpi_specific_hotkey_enabled); |
73 | ||
1da177e4 LT |
74 | static unsigned int acpi_irq_irq; |
75 | static acpi_osd_handler acpi_irq_handler; | |
76 | static void *acpi_irq_context; | |
77 | static struct workqueue_struct *kacpid_wq; | |
78 | ||
4be44fcd | 79 | acpi_status acpi_os_initialize(void) |
1da177e4 LT |
80 | { |
81 | return AE_OK; | |
82 | } | |
83 | ||
4be44fcd | 84 | acpi_status acpi_os_initialize1(void) |
1da177e4 LT |
85 | { |
86 | /* | |
87 | * Initialize PCI configuration space access, as we'll need to access | |
88 | * it while walking the namespace (bus 0 and root bridges w/ _BBNs). | |
89 | */ | |
1da177e4 | 90 | if (!raw_pci_ops) { |
4be44fcd LB |
91 | printk(KERN_ERR PREFIX |
92 | "Access to PCI configuration space unavailable\n"); | |
1da177e4 LT |
93 | return AE_NULL_ENTRY; |
94 | } | |
1da177e4 LT |
95 | kacpid_wq = create_singlethread_workqueue("kacpid"); |
96 | BUG_ON(!kacpid_wq); | |
97 | ||
98 | return AE_OK; | |
99 | } | |
100 | ||
4be44fcd | 101 | acpi_status acpi_os_terminate(void) |
1da177e4 LT |
102 | { |
103 | if (acpi_irq_handler) { | |
104 | acpi_os_remove_interrupt_handler(acpi_irq_irq, | |
105 | acpi_irq_handler); | |
106 | } | |
107 | ||
108 | destroy_workqueue(kacpid_wq); | |
109 | ||
110 | return AE_OK; | |
111 | } | |
112 | ||
4be44fcd | 113 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
114 | { |
115 | va_list args; | |
116 | va_start(args, fmt); | |
117 | acpi_os_vprintf(fmt, args); | |
118 | va_end(args); | |
119 | } | |
4be44fcd | 120 | |
1da177e4 LT |
121 | EXPORT_SYMBOL(acpi_os_printf); |
122 | ||
4be44fcd | 123 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
124 | { |
125 | static char buffer[512]; | |
4be44fcd | 126 | |
1da177e4 LT |
127 | vsprintf(buffer, fmt, args); |
128 | ||
129 | #ifdef ENABLE_DEBUGGER | |
130 | if (acpi_in_debugger) { | |
131 | kdb_printf("%s", buffer); | |
132 | } else { | |
133 | printk("%s", buffer); | |
134 | } | |
135 | #else | |
136 | printk("%s", buffer); | |
137 | #endif | |
138 | } | |
139 | ||
11e981f1 | 140 | extern int acpi_in_resume; |
4be44fcd | 141 | void *acpi_os_allocate(acpi_size size) |
1da177e4 | 142 | { |
11e981f1 DSL |
143 | if (acpi_in_resume) |
144 | return kmalloc(size, GFP_ATOMIC); | |
145 | else | |
146 | return kmalloc(size, GFP_KERNEL); | |
1da177e4 LT |
147 | } |
148 | ||
4be44fcd | 149 | void acpi_os_free(void *ptr) |
1da177e4 LT |
150 | { |
151 | kfree(ptr); | |
152 | } | |
4be44fcd | 153 | |
1da177e4 LT |
154 | EXPORT_SYMBOL(acpi_os_free); |
155 | ||
4be44fcd | 156 | acpi_status acpi_os_get_root_pointer(u32 flags, struct acpi_pointer *addr) |
1da177e4 LT |
157 | { |
158 | if (efi_enabled) { | |
159 | addr->pointer_type = ACPI_PHYSICAL_POINTER; | |
b2c99e3c BH |
160 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
161 | addr->pointer.physical = efi.acpi20; | |
162 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) | |
163 | addr->pointer.physical = efi.acpi; | |
1da177e4 | 164 | else { |
4be44fcd LB |
165 | printk(KERN_ERR PREFIX |
166 | "System description tables not found\n"); | |
1da177e4 LT |
167 | return AE_NOT_FOUND; |
168 | } | |
169 | } else { | |
170 | if (ACPI_FAILURE(acpi_find_root_pointer(flags, addr))) { | |
4be44fcd LB |
171 | printk(KERN_ERR PREFIX |
172 | "System description tables not found\n"); | |
1da177e4 LT |
173 | return AE_NOT_FOUND; |
174 | } | |
175 | } | |
176 | ||
177 | return AE_OK; | |
178 | } | |
179 | ||
180 | acpi_status | |
4be44fcd LB |
181 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size, |
182 | void __iomem ** virt) | |
1da177e4 | 183 | { |
9f4fd61f BH |
184 | if (phys > ULONG_MAX) { |
185 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
186 | return AE_BAD_PARAMETER; | |
1da177e4 | 187 | } |
9f4fd61f BH |
188 | /* |
189 | * ioremap checks to ensure this is in reserved space | |
190 | */ | |
191 | *virt = ioremap((unsigned long)phys, size); | |
1da177e4 LT |
192 | |
193 | if (!*virt) | |
194 | return AE_NO_MEMORY; | |
195 | ||
196 | return AE_OK; | |
197 | } | |
55a82ab3 | 198 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 199 | |
4be44fcd | 200 | void acpi_os_unmap_memory(void __iomem * virt, acpi_size size) |
1da177e4 LT |
201 | { |
202 | iounmap(virt); | |
203 | } | |
55a82ab3 | 204 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 LT |
205 | |
206 | #ifdef ACPI_FUTURE_USAGE | |
207 | acpi_status | |
4be44fcd | 208 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 209 | { |
4be44fcd | 210 | if (!phys || !virt) |
1da177e4 LT |
211 | return AE_BAD_PARAMETER; |
212 | ||
213 | *phys = virt_to_phys(virt); | |
214 | ||
215 | return AE_OK; | |
216 | } | |
217 | #endif | |
218 | ||
219 | #define ACPI_MAX_OVERRIDE_LEN 100 | |
220 | ||
221 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
222 | ||
223 | acpi_status | |
4be44fcd LB |
224 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
225 | acpi_string * new_val) | |
1da177e4 LT |
226 | { |
227 | if (!init_val || !new_val) | |
228 | return AE_BAD_PARAMETER; | |
229 | ||
230 | *new_val = NULL; | |
4be44fcd | 231 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 232 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 233 | acpi_os_name); |
1da177e4 LT |
234 | *new_val = acpi_os_name; |
235 | } | |
236 | ||
237 | return AE_OK; | |
238 | } | |
239 | ||
240 | acpi_status | |
4be44fcd LB |
241 | acpi_os_table_override(struct acpi_table_header * existing_table, |
242 | struct acpi_table_header ** new_table) | |
1da177e4 LT |
243 | { |
244 | if (!existing_table || !new_table) | |
245 | return AE_BAD_PARAMETER; | |
246 | ||
247 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
248 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
4be44fcd | 249 | *new_table = (struct acpi_table_header *)AmlCode; |
1da177e4 LT |
250 | else |
251 | *new_table = NULL; | |
252 | #else | |
253 | *new_table = NULL; | |
254 | #endif | |
255 | return AE_OK; | |
256 | } | |
257 | ||
4be44fcd | 258 | static irqreturn_t acpi_irq(int irq, void *dev_id, struct pt_regs *regs) |
1da177e4 | 259 | { |
4be44fcd | 260 | return (*acpi_irq_handler) (acpi_irq_context) ? IRQ_HANDLED : IRQ_NONE; |
1da177e4 LT |
261 | } |
262 | ||
263 | acpi_status | |
4be44fcd LB |
264 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
265 | void *context) | |
1da177e4 LT |
266 | { |
267 | unsigned int irq; | |
268 | ||
269 | /* | |
270 | * Ignore the GSI from the core, and use the value in our copy of the | |
271 | * FADT. It may not be the same if an interrupt source override exists | |
272 | * for the SCI. | |
273 | */ | |
274 | gsi = acpi_fadt.sci_int; | |
275 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { | |
276 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
277 | gsi); | |
278 | return AE_OK; | |
279 | } | |
280 | ||
281 | acpi_irq_handler = handler; | |
282 | acpi_irq_context = context; | |
283 | if (request_irq(irq, acpi_irq, SA_SHIRQ, "acpi", acpi_irq)) { | |
284 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); | |
285 | return AE_NOT_ACQUIRED; | |
286 | } | |
287 | acpi_irq_irq = irq; | |
288 | ||
289 | return AE_OK; | |
290 | } | |
291 | ||
4be44fcd | 292 | acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) |
1da177e4 LT |
293 | { |
294 | if (irq) { | |
295 | free_irq(irq, acpi_irq); | |
296 | acpi_irq_handler = NULL; | |
297 | acpi_irq_irq = 0; | |
298 | } | |
299 | ||
300 | return AE_OK; | |
301 | } | |
302 | ||
303 | /* | |
304 | * Running in interpreter thread context, safe to sleep | |
305 | */ | |
306 | ||
4be44fcd | 307 | void acpi_os_sleep(acpi_integer ms) |
1da177e4 | 308 | { |
01a527ec | 309 | schedule_timeout_interruptible(msecs_to_jiffies(ms)); |
1da177e4 | 310 | } |
4be44fcd | 311 | |
1da177e4 LT |
312 | EXPORT_SYMBOL(acpi_os_sleep); |
313 | ||
4be44fcd | 314 | void acpi_os_stall(u32 us) |
1da177e4 LT |
315 | { |
316 | while (us) { | |
317 | u32 delay = 1000; | |
318 | ||
319 | if (delay > us) | |
320 | delay = us; | |
321 | udelay(delay); | |
322 | touch_nmi_watchdog(); | |
323 | us -= delay; | |
324 | } | |
325 | } | |
4be44fcd | 326 | |
1da177e4 LT |
327 | EXPORT_SYMBOL(acpi_os_stall); |
328 | ||
329 | /* | |
330 | * Support ACPI 3.0 AML Timer operand | |
331 | * Returns 64-bit free-running, monotonically increasing timer | |
332 | * with 100ns granularity | |
333 | */ | |
4be44fcd | 334 | u64 acpi_os_get_timer(void) |
1da177e4 LT |
335 | { |
336 | static u64 t; | |
337 | ||
338 | #ifdef CONFIG_HPET | |
339 | /* TBD: use HPET if available */ | |
340 | #endif | |
341 | ||
342 | #ifdef CONFIG_X86_PM_TIMER | |
343 | /* TBD: default to PM timer if HPET was not available */ | |
344 | #endif | |
345 | if (!t) | |
346 | printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n"); | |
347 | ||
348 | return ++t; | |
349 | } | |
350 | ||
4be44fcd | 351 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
352 | { |
353 | u32 dummy; | |
354 | ||
355 | if (!value) | |
356 | value = &dummy; | |
357 | ||
4be44fcd | 358 | switch (width) { |
1da177e4 | 359 | case 8: |
4be44fcd | 360 | *(u8 *) value = inb(port); |
1da177e4 LT |
361 | break; |
362 | case 16: | |
4be44fcd | 363 | *(u16 *) value = inw(port); |
1da177e4 LT |
364 | break; |
365 | case 32: | |
4be44fcd | 366 | *(u32 *) value = inl(port); |
1da177e4 LT |
367 | break; |
368 | default: | |
369 | BUG(); | |
370 | } | |
371 | ||
372 | return AE_OK; | |
373 | } | |
4be44fcd | 374 | |
1da177e4 LT |
375 | EXPORT_SYMBOL(acpi_os_read_port); |
376 | ||
4be44fcd | 377 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 378 | { |
4be44fcd | 379 | switch (width) { |
1da177e4 LT |
380 | case 8: |
381 | outb(value, port); | |
382 | break; | |
383 | case 16: | |
384 | outw(value, port); | |
385 | break; | |
386 | case 32: | |
387 | outl(value, port); | |
388 | break; | |
389 | default: | |
390 | BUG(); | |
391 | } | |
392 | ||
393 | return AE_OK; | |
394 | } | |
4be44fcd | 395 | |
1da177e4 LT |
396 | EXPORT_SYMBOL(acpi_os_write_port); |
397 | ||
398 | acpi_status | |
4be44fcd | 399 | acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width) |
1da177e4 | 400 | { |
4be44fcd LB |
401 | u32 dummy; |
402 | void __iomem *virt_addr; | |
1da177e4 | 403 | |
9f4fd61f | 404 | virt_addr = ioremap(phys_addr, width); |
1da177e4 LT |
405 | if (!value) |
406 | value = &dummy; | |
407 | ||
408 | switch (width) { | |
409 | case 8: | |
4be44fcd | 410 | *(u8 *) value = readb(virt_addr); |
1da177e4 LT |
411 | break; |
412 | case 16: | |
4be44fcd | 413 | *(u16 *) value = readw(virt_addr); |
1da177e4 LT |
414 | break; |
415 | case 32: | |
4be44fcd | 416 | *(u32 *) value = readl(virt_addr); |
1da177e4 LT |
417 | break; |
418 | default: | |
419 | BUG(); | |
420 | } | |
421 | ||
9f4fd61f | 422 | iounmap(virt_addr); |
1da177e4 LT |
423 | |
424 | return AE_OK; | |
425 | } | |
426 | ||
427 | acpi_status | |
4be44fcd | 428 | acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width) |
1da177e4 | 429 | { |
4be44fcd | 430 | void __iomem *virt_addr; |
1da177e4 | 431 | |
9f4fd61f | 432 | virt_addr = ioremap(phys_addr, width); |
1da177e4 LT |
433 | |
434 | switch (width) { | |
435 | case 8: | |
436 | writeb(value, virt_addr); | |
437 | break; | |
438 | case 16: | |
439 | writew(value, virt_addr); | |
440 | break; | |
441 | case 32: | |
442 | writel(value, virt_addr); | |
443 | break; | |
444 | default: | |
445 | BUG(); | |
446 | } | |
447 | ||
9f4fd61f | 448 | iounmap(virt_addr); |
1da177e4 LT |
449 | |
450 | return AE_OK; | |
451 | } | |
452 | ||
1da177e4 | 453 | acpi_status |
4be44fcd LB |
454 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
455 | void *value, u32 width) | |
1da177e4 LT |
456 | { |
457 | int result, size; | |
458 | ||
459 | if (!value) | |
460 | return AE_BAD_PARAMETER; | |
461 | ||
462 | switch (width) { | |
463 | case 8: | |
464 | size = 1; | |
465 | break; | |
466 | case 16: | |
467 | size = 2; | |
468 | break; | |
469 | case 32: | |
470 | size = 4; | |
471 | break; | |
472 | default: | |
473 | return AE_ERROR; | |
474 | } | |
475 | ||
476 | BUG_ON(!raw_pci_ops); | |
477 | ||
478 | result = raw_pci_ops->read(pci_id->segment, pci_id->bus, | |
4be44fcd LB |
479 | PCI_DEVFN(pci_id->device, pci_id->function), |
480 | reg, size, value); | |
1da177e4 LT |
481 | |
482 | return (result ? AE_ERROR : AE_OK); | |
483 | } | |
4be44fcd | 484 | |
1da177e4 LT |
485 | EXPORT_SYMBOL(acpi_os_read_pci_configuration); |
486 | ||
487 | acpi_status | |
4be44fcd LB |
488 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
489 | acpi_integer value, u32 width) | |
1da177e4 LT |
490 | { |
491 | int result, size; | |
492 | ||
493 | switch (width) { | |
494 | case 8: | |
495 | size = 1; | |
496 | break; | |
497 | case 16: | |
498 | size = 2; | |
499 | break; | |
500 | case 32: | |
501 | size = 4; | |
502 | break; | |
503 | default: | |
504 | return AE_ERROR; | |
505 | } | |
506 | ||
507 | BUG_ON(!raw_pci_ops); | |
508 | ||
509 | result = raw_pci_ops->write(pci_id->segment, pci_id->bus, | |
4be44fcd LB |
510 | PCI_DEVFN(pci_id->device, pci_id->function), |
511 | reg, size, value); | |
1da177e4 LT |
512 | |
513 | return (result ? AE_ERROR : AE_OK); | |
514 | } | |
515 | ||
516 | /* TODO: Change code to take advantage of driver model more */ | |
4be44fcd LB |
517 | static void acpi_os_derive_pci_id_2(acpi_handle rhandle, /* upper bound */ |
518 | acpi_handle chandle, /* current node */ | |
519 | struct acpi_pci_id **id, | |
520 | int *is_bridge, u8 * bus_number) | |
1da177e4 | 521 | { |
4be44fcd LB |
522 | acpi_handle handle; |
523 | struct acpi_pci_id *pci_id = *id; | |
524 | acpi_status status; | |
525 | unsigned long temp; | |
526 | acpi_object_type type; | |
527 | u8 tu8; | |
1da177e4 LT |
528 | |
529 | acpi_get_parent(chandle, &handle); | |
530 | if (handle != rhandle) { | |
4be44fcd LB |
531 | acpi_os_derive_pci_id_2(rhandle, handle, &pci_id, is_bridge, |
532 | bus_number); | |
1da177e4 LT |
533 | |
534 | status = acpi_get_type(handle, &type); | |
4be44fcd | 535 | if ((ACPI_FAILURE(status)) || (type != ACPI_TYPE_DEVICE)) |
1da177e4 LT |
536 | return; |
537 | ||
4be44fcd LB |
538 | status = |
539 | acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, | |
540 | &temp); | |
1da177e4 | 541 | if (ACPI_SUCCESS(status)) { |
4be44fcd LB |
542 | pci_id->device = ACPI_HIWORD(ACPI_LODWORD(temp)); |
543 | pci_id->function = ACPI_LOWORD(ACPI_LODWORD(temp)); | |
1da177e4 LT |
544 | |
545 | if (*is_bridge) | |
546 | pci_id->bus = *bus_number; | |
547 | ||
548 | /* any nicer way to get bus number of bridge ? */ | |
4be44fcd LB |
549 | status = |
550 | acpi_os_read_pci_configuration(pci_id, 0x0e, &tu8, | |
551 | 8); | |
552 | if (ACPI_SUCCESS(status) | |
553 | && ((tu8 & 0x7f) == 1 || (tu8 & 0x7f) == 2)) { | |
554 | status = | |
555 | acpi_os_read_pci_configuration(pci_id, 0x18, | |
556 | &tu8, 8); | |
1da177e4 LT |
557 | if (!ACPI_SUCCESS(status)) { |
558 | /* Certainly broken... FIX ME */ | |
559 | return; | |
560 | } | |
561 | *is_bridge = 1; | |
562 | pci_id->bus = tu8; | |
4be44fcd LB |
563 | status = |
564 | acpi_os_read_pci_configuration(pci_id, 0x19, | |
565 | &tu8, 8); | |
1da177e4 LT |
566 | if (ACPI_SUCCESS(status)) { |
567 | *bus_number = tu8; | |
568 | } | |
569 | } else | |
570 | *is_bridge = 0; | |
571 | } | |
572 | } | |
573 | } | |
574 | ||
4be44fcd LB |
575 | void acpi_os_derive_pci_id(acpi_handle rhandle, /* upper bound */ |
576 | acpi_handle chandle, /* current node */ | |
577 | struct acpi_pci_id **id) | |
1da177e4 LT |
578 | { |
579 | int is_bridge = 1; | |
580 | u8 bus_number = (*id)->bus; | |
581 | ||
582 | acpi_os_derive_pci_id_2(rhandle, chandle, id, &is_bridge, &bus_number); | |
583 | } | |
584 | ||
4be44fcd | 585 | static void acpi_os_execute_deferred(void *context) |
1da177e4 | 586 | { |
4be44fcd | 587 | struct acpi_os_dpc *dpc = NULL; |
1da177e4 | 588 | |
4be44fcd | 589 | ACPI_FUNCTION_TRACE("os_execute_deferred"); |
1da177e4 | 590 | |
4be44fcd | 591 | dpc = (struct acpi_os_dpc *)context; |
1da177e4 | 592 | if (!dpc) { |
4be44fcd | 593 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid (NULL) context.\n")); |
1da177e4 LT |
594 | return_VOID; |
595 | } | |
596 | ||
597 | dpc->function(dpc->context); | |
598 | ||
599 | kfree(dpc); | |
600 | ||
601 | return_VOID; | |
602 | } | |
603 | ||
b8d35192 AS |
604 | static int acpi_os_execute_thread(void *context) |
605 | { | |
606 | struct acpi_os_dpc *dpc = (struct acpi_os_dpc *)context; | |
607 | if (dpc) { | |
608 | dpc->function(dpc->context); | |
609 | kfree(dpc); | |
610 | } | |
611 | do_exit(0); | |
612 | } | |
613 | ||
614 | /******************************************************************************* | |
615 | * | |
616 | * FUNCTION: acpi_os_execute | |
617 | * | |
618 | * PARAMETERS: Type - Type of the callback | |
619 | * Function - Function to be executed | |
620 | * Context - Function parameters | |
621 | * | |
622 | * RETURN: Status | |
623 | * | |
624 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
625 | * immediately executes function on a separate thread. | |
626 | * | |
627 | ******************************************************************************/ | |
628 | ||
629 | acpi_status acpi_os_execute(acpi_execute_type type, | |
4be44fcd | 630 | acpi_osd_exec_callback function, void *context) |
1da177e4 | 631 | { |
4be44fcd LB |
632 | acpi_status status = AE_OK; |
633 | struct acpi_os_dpc *dpc; | |
634 | struct work_struct *task; | |
b8d35192 | 635 | struct task_struct *p; |
1da177e4 LT |
636 | |
637 | if (!function) | |
b8d35192 | 638 | return AE_BAD_PARAMETER; |
1da177e4 LT |
639 | /* |
640 | * Allocate/initialize DPC structure. Note that this memory will be | |
641 | * freed by the callee. The kernel handles the tq_struct list in a | |
642 | * way that allows us to also free its memory inside the callee. | |
643 | * Because we may want to schedule several tasks with different | |
644 | * parameters we can't use the approach some kernel code uses of | |
645 | * having a static tq_struct. | |
646 | * We can save time and code by allocating the DPC and tq_structs | |
647 | * from the same memory. | |
648 | */ | |
b8d35192 AS |
649 | if (type == OSL_NOTIFY_HANDLER) { |
650 | dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_KERNEL); | |
651 | } else { | |
652 | dpc = kmalloc(sizeof(struct acpi_os_dpc) + | |
653 | sizeof(struct work_struct), GFP_ATOMIC); | |
654 | } | |
1da177e4 | 655 | if (!dpc) |
b8d35192 | 656 | return AE_NO_MEMORY; |
1da177e4 LT |
657 | dpc->function = function; |
658 | dpc->context = context; | |
659 | ||
b8d35192 AS |
660 | if (type == OSL_NOTIFY_HANDLER) { |
661 | p = kthread_create(acpi_os_execute_thread, dpc, "kacpid_notify"); | |
662 | if (!IS_ERR(p)) { | |
663 | wake_up_process(p); | |
664 | } else { | |
665 | status = AE_NO_MEMORY; | |
666 | kfree(dpc); | |
667 | } | |
668 | } else { | |
669 | task = (void *)(dpc + 1); | |
670 | INIT_WORK(task, acpi_os_execute_deferred, (void *)dpc); | |
671 | if (!queue_work(kacpid_wq, task)) { | |
672 | status = AE_ERROR; | |
673 | kfree(dpc); | |
674 | } | |
1da177e4 | 675 | } |
b8d35192 | 676 | return status; |
1da177e4 | 677 | } |
4be44fcd | 678 | |
b8d35192 | 679 | EXPORT_SYMBOL(acpi_os_execute); |
1da177e4 | 680 | |
4be44fcd | 681 | void acpi_os_wait_events_complete(void *context) |
1da177e4 LT |
682 | { |
683 | flush_workqueue(kacpid_wq); | |
684 | } | |
4be44fcd | 685 | |
1da177e4 LT |
686 | EXPORT_SYMBOL(acpi_os_wait_events_complete); |
687 | ||
688 | /* | |
689 | * Allocate the memory for a spinlock and initialize it. | |
690 | */ | |
4be44fcd | 691 | acpi_status acpi_os_create_lock(acpi_handle * out_handle) |
1da177e4 LT |
692 | { |
693 | spinlock_t *lock_ptr; | |
694 | ||
4be44fcd | 695 | ACPI_FUNCTION_TRACE("os_create_lock"); |
1da177e4 LT |
696 | |
697 | lock_ptr = acpi_os_allocate(sizeof(spinlock_t)); | |
698 | ||
699 | spin_lock_init(lock_ptr); | |
700 | ||
4be44fcd | 701 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating spinlock[%p].\n", lock_ptr)); |
1da177e4 LT |
702 | |
703 | *out_handle = lock_ptr; | |
704 | ||
4be44fcd | 705 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
706 | } |
707 | ||
1da177e4 LT |
708 | /* |
709 | * Deallocate the memory for a spinlock. | |
710 | */ | |
4be44fcd | 711 | void acpi_os_delete_lock(acpi_handle handle) |
1da177e4 | 712 | { |
4be44fcd | 713 | ACPI_FUNCTION_TRACE("os_create_lock"); |
1da177e4 | 714 | |
4be44fcd | 715 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting spinlock[%p].\n", handle)); |
1da177e4 LT |
716 | |
717 | acpi_os_free(handle); | |
718 | ||
719 | return_VOID; | |
720 | } | |
721 | ||
1da177e4 | 722 | acpi_status |
4be44fcd | 723 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 724 | { |
4be44fcd | 725 | struct semaphore *sem = NULL; |
1da177e4 | 726 | |
4be44fcd | 727 | ACPI_FUNCTION_TRACE("os_create_semaphore"); |
1da177e4 LT |
728 | |
729 | sem = acpi_os_allocate(sizeof(struct semaphore)); | |
730 | if (!sem) | |
4be44fcd | 731 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
732 | memset(sem, 0, sizeof(struct semaphore)); |
733 | ||
734 | sema_init(sem, initial_units); | |
735 | ||
4be44fcd | 736 | *handle = (acpi_handle *) sem; |
1da177e4 | 737 | |
4be44fcd LB |
738 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
739 | *handle, initial_units)); | |
1da177e4 | 740 | |
4be44fcd | 741 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 742 | } |
1da177e4 | 743 | |
4be44fcd | 744 | EXPORT_SYMBOL(acpi_os_create_semaphore); |
1da177e4 LT |
745 | |
746 | /* | |
747 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
748 | * 'delete_semaphore()' function -- may result in an invalid | |
749 | * pointer dereference for non-synchronized consumers. Should | |
750 | * we at least check for blocked threads and signal/cancel them? | |
751 | */ | |
752 | ||
4be44fcd | 753 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 754 | { |
4be44fcd | 755 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 756 | |
4be44fcd | 757 | ACPI_FUNCTION_TRACE("os_delete_semaphore"); |
1da177e4 LT |
758 | |
759 | if (!sem) | |
4be44fcd | 760 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 | 761 | |
4be44fcd | 762 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 763 | |
4be44fcd LB |
764 | acpi_os_free(sem); |
765 | sem = NULL; | |
1da177e4 | 766 | |
4be44fcd | 767 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 768 | } |
1da177e4 | 769 | |
4be44fcd | 770 | EXPORT_SYMBOL(acpi_os_delete_semaphore); |
1da177e4 LT |
771 | |
772 | /* | |
773 | * TODO: The kernel doesn't have a 'down_timeout' function -- had to | |
774 | * improvise. The process is to sleep for one scheduler quantum | |
775 | * until the semaphore becomes available. Downside is that this | |
776 | * may result in starvation for timeout-based waits when there's | |
777 | * lots of semaphore activity. | |
778 | * | |
779 | * TODO: Support for units > 1? | |
780 | */ | |
4be44fcd | 781 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 782 | { |
4be44fcd LB |
783 | acpi_status status = AE_OK; |
784 | struct semaphore *sem = (struct semaphore *)handle; | |
785 | int ret = 0; | |
1da177e4 | 786 | |
4be44fcd | 787 | ACPI_FUNCTION_TRACE("os_wait_semaphore"); |
1da177e4 LT |
788 | |
789 | if (!sem || (units < 1)) | |
4be44fcd | 790 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
791 | |
792 | if (units > 1) | |
4be44fcd | 793 | return_ACPI_STATUS(AE_SUPPORT); |
1da177e4 | 794 | |
4be44fcd LB |
795 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
796 | handle, units, timeout)); | |
1da177e4 | 797 | |
4be44fcd | 798 | switch (timeout) { |
1da177e4 LT |
799 | /* |
800 | * No Wait: | |
801 | * -------- | |
802 | * A zero timeout value indicates that we shouldn't wait - just | |
803 | * acquire the semaphore if available otherwise return AE_TIME | |
804 | * (a.k.a. 'would block'). | |
805 | */ | |
4be44fcd LB |
806 | case 0: |
807 | if (down_trylock(sem)) | |
1da177e4 LT |
808 | status = AE_TIME; |
809 | break; | |
810 | ||
811 | /* | |
812 | * Wait Indefinitely: | |
813 | * ------------------ | |
814 | */ | |
4be44fcd | 815 | case ACPI_WAIT_FOREVER: |
1da177e4 LT |
816 | down(sem); |
817 | break; | |
818 | ||
819 | /* | |
820 | * Wait w/ Timeout: | |
821 | * ---------------- | |
822 | */ | |
4be44fcd | 823 | default: |
1da177e4 LT |
824 | // TODO: A better timeout algorithm? |
825 | { | |
826 | int i = 0; | |
4be44fcd | 827 | static const int quantum_ms = 1000 / HZ; |
1da177e4 LT |
828 | |
829 | ret = down_trylock(sem); | |
dacd9b80 | 830 | for (i = timeout; (i > 0 && ret != 0); i -= quantum_ms) { |
01a527ec | 831 | schedule_timeout_interruptible(1); |
1da177e4 LT |
832 | ret = down_trylock(sem); |
833 | } | |
4be44fcd | 834 | |
1da177e4 LT |
835 | if (ret != 0) |
836 | status = AE_TIME; | |
837 | } | |
838 | break; | |
839 | } | |
840 | ||
841 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
842 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
843 | "Failed to acquire semaphore[%p|%d|%d], %s\n", | |
844 | handle, units, timeout, | |
845 | acpi_format_exception(status))); | |
846 | } else { | |
847 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
848 | "Acquired semaphore[%p|%d|%d]\n", handle, | |
849 | units, timeout)); | |
1da177e4 LT |
850 | } |
851 | ||
4be44fcd | 852 | return_ACPI_STATUS(status); |
1da177e4 | 853 | } |
1da177e4 | 854 | |
4be44fcd | 855 | EXPORT_SYMBOL(acpi_os_wait_semaphore); |
1da177e4 LT |
856 | |
857 | /* | |
858 | * TODO: Support for units > 1? | |
859 | */ | |
4be44fcd | 860 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 861 | { |
4be44fcd | 862 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 863 | |
4be44fcd | 864 | ACPI_FUNCTION_TRACE("os_signal_semaphore"); |
1da177e4 LT |
865 | |
866 | if (!sem || (units < 1)) | |
4be44fcd | 867 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
868 | |
869 | if (units > 1) | |
4be44fcd | 870 | return_ACPI_STATUS(AE_SUPPORT); |
1da177e4 | 871 | |
4be44fcd LB |
872 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
873 | units)); | |
1da177e4 LT |
874 | |
875 | up(sem); | |
876 | ||
4be44fcd | 877 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 878 | } |
4be44fcd | 879 | |
1da177e4 LT |
880 | EXPORT_SYMBOL(acpi_os_signal_semaphore); |
881 | ||
882 | #ifdef ACPI_FUTURE_USAGE | |
4be44fcd | 883 | u32 acpi_os_get_line(char *buffer) |
1da177e4 LT |
884 | { |
885 | ||
886 | #ifdef ENABLE_DEBUGGER | |
887 | if (acpi_in_debugger) { | |
888 | u32 chars; | |
889 | ||
890 | kdb_read(buffer, sizeof(line_buf)); | |
891 | ||
892 | /* remove the CR kdb includes */ | |
893 | chars = strlen(buffer) - 1; | |
894 | buffer[chars] = '\0'; | |
895 | } | |
896 | #endif | |
897 | ||
898 | return 0; | |
899 | } | |
4be44fcd | 900 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 LT |
901 | |
902 | /* Assumes no unreadable holes inbetween */ | |
4be44fcd | 903 | u8 acpi_os_readable(void *ptr, acpi_size len) |
1da177e4 | 904 | { |
4be44fcd | 905 | #if defined(__i386__) || defined(__x86_64__) |
1da177e4 | 906 | char tmp; |
4be44fcd LB |
907 | return !__get_user(tmp, (char __user *)ptr) |
908 | && !__get_user(tmp, (char __user *)ptr + len - 1); | |
1da177e4 LT |
909 | #endif |
910 | return 1; | |
911 | } | |
912 | ||
913 | #ifdef ACPI_FUTURE_USAGE | |
4be44fcd | 914 | u8 acpi_os_writable(void *ptr, acpi_size len) |
1da177e4 LT |
915 | { |
916 | /* could do dummy write (racy) or a kernel page table lookup. | |
917 | The later may be difficult at early boot when kmap doesn't work yet. */ | |
918 | return 1; | |
919 | } | |
920 | #endif | |
921 | ||
4be44fcd | 922 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 923 | { |
4be44fcd | 924 | switch (function) { |
1da177e4 LT |
925 | case ACPI_SIGNAL_FATAL: |
926 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
927 | break; | |
928 | case ACPI_SIGNAL_BREAKPOINT: | |
929 | /* | |
930 | * AML Breakpoint | |
931 | * ACPI spec. says to treat it as a NOP unless | |
932 | * you are debugging. So if/when we integrate | |
933 | * AML debugger into the kernel debugger its | |
934 | * hook will go here. But until then it is | |
935 | * not useful to print anything on breakpoints. | |
936 | */ | |
937 | break; | |
938 | default: | |
939 | break; | |
940 | } | |
941 | ||
942 | return AE_OK; | |
943 | } | |
4be44fcd | 944 | |
1da177e4 LT |
945 | EXPORT_SYMBOL(acpi_os_signal); |
946 | ||
4be44fcd | 947 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
948 | { |
949 | char *p = acpi_os_name; | |
4be44fcd | 950 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
951 | |
952 | if (!str || !*str) | |
953 | return 0; | |
954 | ||
955 | for (; count-- && str && *str; str++) { | |
956 | if (isalnum(*str) || *str == ' ' || *str == ':') | |
957 | *p++ = *str; | |
958 | else if (*str == '\'' || *str == '"') | |
959 | continue; | |
960 | else | |
961 | break; | |
962 | } | |
963 | *p = 0; | |
964 | ||
965 | return 1; | |
4be44fcd | 966 | |
1da177e4 LT |
967 | } |
968 | ||
969 | __setup("acpi_os_name=", acpi_os_name_setup); | |
970 | ||
971 | /* | |
972 | * _OSI control | |
973 | * empty string disables _OSI | |
974 | * TBD additional string adds to _OSI | |
975 | */ | |
4be44fcd | 976 | static int __init acpi_osi_setup(char *str) |
1da177e4 LT |
977 | { |
978 | if (str == NULL || *str == '\0') { | |
979 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
980 | acpi_gbl_create_osi_method = FALSE; | |
4be44fcd | 981 | } else { |
1da177e4 | 982 | /* TBD */ |
4be44fcd LB |
983 | printk(KERN_ERR PREFIX "_OSI additional string ignored -- %s\n", |
984 | str); | |
1da177e4 LT |
985 | } |
986 | ||
987 | return 1; | |
988 | } | |
989 | ||
990 | __setup("acpi_osi=", acpi_osi_setup); | |
991 | ||
992 | /* enable serialization to combat AE_ALREADY_EXISTS errors */ | |
4be44fcd | 993 | static int __init acpi_serialize_setup(char *str) |
1da177e4 LT |
994 | { |
995 | printk(KERN_INFO PREFIX "serialize enabled\n"); | |
996 | ||
997 | acpi_gbl_all_methods_serialized = TRUE; | |
998 | ||
999 | return 1; | |
1000 | } | |
1001 | ||
1002 | __setup("acpi_serialize", acpi_serialize_setup); | |
1003 | ||
1004 | /* | |
1005 | * Wake and Run-Time GPES are expected to be separate. | |
1006 | * We disable wake-GPEs at run-time to prevent spurious | |
1007 | * interrupts. | |
1008 | * | |
1009 | * However, if a system exists that shares Wake and | |
1010 | * Run-time events on the same GPE this flag is available | |
1011 | * to tell Linux to keep the wake-time GPEs enabled at run-time. | |
1012 | */ | |
4be44fcd | 1013 | static int __init acpi_wake_gpes_always_on_setup(char *str) |
1da177e4 LT |
1014 | { |
1015 | printk(KERN_INFO PREFIX "wake GPEs not disabled\n"); | |
1016 | ||
1017 | acpi_gbl_leave_wake_gpes_disabled = FALSE; | |
1018 | ||
1019 | return 1; | |
1020 | } | |
1021 | ||
1022 | __setup("acpi_wake_gpes_always_on", acpi_wake_gpes_always_on_setup); | |
1023 | ||
8713cbef | 1024 | static int __init acpi_hotkey_setup(char *str) |
fb9802fa | 1025 | { |
30e332f3 | 1026 | acpi_specific_hotkey_enabled = FALSE; |
fb9802fa LY |
1027 | return 1; |
1028 | } | |
1029 | ||
30e332f3 | 1030 | __setup("acpi_generic_hotkey", acpi_hotkey_setup); |
fb9802fa | 1031 | |
1da177e4 LT |
1032 | /* |
1033 | * max_cstate is defined in the base kernel so modules can | |
1034 | * change it w/o depending on the state of the processor module. | |
1035 | */ | |
1036 | unsigned int max_cstate = ACPI_PROCESSOR_MAX_POWER; | |
1037 | ||
1da177e4 | 1038 | EXPORT_SYMBOL(max_cstate); |
73459f73 RM |
1039 | |
1040 | /* | |
1041 | * Acquire a spinlock. | |
1042 | * | |
1043 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1044 | */ |
1045 | ||
b8e4d893 | 1046 | acpi_cpu_flags acpi_os_acquire_lock(acpi_handle handle) |
73459f73 | 1047 | { |
b8e4d893 | 1048 | acpi_cpu_flags flags; |
4be44fcd | 1049 | spin_lock_irqsave((spinlock_t *) handle, flags); |
73459f73 RM |
1050 | return flags; |
1051 | } | |
1052 | ||
1053 | /* | |
1054 | * Release a spinlock. See above. | |
1055 | */ | |
1056 | ||
b8e4d893 | 1057 | void acpi_os_release_lock(acpi_handle handle, acpi_cpu_flags flags) |
73459f73 | 1058 | { |
b8e4d893 | 1059 | spin_unlock_irqrestore((spinlock_t *) handle, flags); |
73459f73 RM |
1060 | } |
1061 | ||
73459f73 RM |
1062 | #ifndef ACPI_USE_LOCAL_CACHE |
1063 | ||
1064 | /******************************************************************************* | |
1065 | * | |
1066 | * FUNCTION: acpi_os_create_cache | |
1067 | * | |
b229cf92 BM |
1068 | * PARAMETERS: name - Ascii name for the cache |
1069 | * size - Size of each cached object | |
1070 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1071 | * cache - Where the new cache object is returned | |
73459f73 | 1072 | * |
b229cf92 | 1073 | * RETURN: status |
73459f73 RM |
1074 | * |
1075 | * DESCRIPTION: Create a cache object | |
1076 | * | |
1077 | ******************************************************************************/ | |
1078 | ||
1079 | acpi_status | |
4be44fcd | 1080 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1081 | { |
4be44fcd | 1082 | *cache = kmem_cache_create(name, size, 0, 0, NULL, NULL); |
b229cf92 BM |
1083 | if (cache == NULL) |
1084 | return AE_ERROR; | |
1085 | else | |
1086 | return AE_OK; | |
73459f73 RM |
1087 | } |
1088 | ||
1089 | /******************************************************************************* | |
1090 | * | |
1091 | * FUNCTION: acpi_os_purge_cache | |
1092 | * | |
1093 | * PARAMETERS: Cache - Handle to cache object | |
1094 | * | |
1095 | * RETURN: Status | |
1096 | * | |
1097 | * DESCRIPTION: Free all objects within the requested cache. | |
1098 | * | |
1099 | ******************************************************************************/ | |
1100 | ||
4be44fcd | 1101 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1102 | { |
4be44fcd LB |
1103 | (void)kmem_cache_shrink(cache); |
1104 | return (AE_OK); | |
73459f73 RM |
1105 | } |
1106 | ||
1107 | /******************************************************************************* | |
1108 | * | |
1109 | * FUNCTION: acpi_os_delete_cache | |
1110 | * | |
1111 | * PARAMETERS: Cache - Handle to cache object | |
1112 | * | |
1113 | * RETURN: Status | |
1114 | * | |
1115 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1116 | * cache object. | |
1117 | * | |
1118 | ******************************************************************************/ | |
1119 | ||
4be44fcd | 1120 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1121 | { |
4be44fcd LB |
1122 | (void)kmem_cache_destroy(cache); |
1123 | return (AE_OK); | |
73459f73 RM |
1124 | } |
1125 | ||
1126 | /******************************************************************************* | |
1127 | * | |
1128 | * FUNCTION: acpi_os_release_object | |
1129 | * | |
1130 | * PARAMETERS: Cache - Handle to cache object | |
1131 | * Object - The object to be released | |
1132 | * | |
1133 | * RETURN: None | |
1134 | * | |
1135 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1136 | * the object is deleted. | |
1137 | * | |
1138 | ******************************************************************************/ | |
1139 | ||
4be44fcd | 1140 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1141 | { |
4be44fcd LB |
1142 | kmem_cache_free(cache, object); |
1143 | return (AE_OK); | |
73459f73 RM |
1144 | } |
1145 | ||
1146 | /******************************************************************************* | |
1147 | * | |
1148 | * FUNCTION: acpi_os_acquire_object | |
1149 | * | |
1150 | * PARAMETERS: Cache - Handle to cache object | |
1151 | * ReturnObject - Where the object is returned | |
1152 | * | |
1153 | * RETURN: Status | |
1154 | * | |
61686124 | 1155 | * DESCRIPTION: Return a zero-filled object. |
73459f73 RM |
1156 | * |
1157 | ******************************************************************************/ | |
1158 | ||
4be44fcd | 1159 | void *acpi_os_acquire_object(acpi_cache_t * cache) |
73459f73 | 1160 | { |
61686124 | 1161 | void *object = kmem_cache_zalloc(cache, GFP_KERNEL); |
4be44fcd LB |
1162 | WARN_ON(!object); |
1163 | return object; | |
73459f73 RM |
1164 | } |
1165 | ||
b229cf92 BM |
1166 | /****************************************************************************** |
1167 | * | |
1168 | * FUNCTION: acpi_os_validate_interface | |
1169 | * | |
1170 | * PARAMETERS: interface - Requested interface to be validated | |
1171 | * | |
1172 | * RETURN: AE_OK if interface is supported, AE_SUPPORT otherwise | |
1173 | * | |
1174 | * DESCRIPTION: Match an interface string to the interfaces supported by the | |
1175 | * host. Strings originate from an AML call to the _OSI method. | |
1176 | * | |
1177 | *****************************************************************************/ | |
1178 | ||
1179 | acpi_status | |
1180 | acpi_os_validate_interface (char *interface) | |
1181 | { | |
1182 | ||
1183 | return AE_SUPPORT; | |
1184 | } | |
1185 | ||
1186 | ||
1187 | /****************************************************************************** | |
1188 | * | |
1189 | * FUNCTION: acpi_os_validate_address | |
1190 | * | |
1191 | * PARAMETERS: space_id - ACPI space ID | |
1192 | * address - Physical address | |
1193 | * length - Address length | |
1194 | * | |
1195 | * RETURN: AE_OK if address/length is valid for the space_id. Otherwise, | |
1196 | * should return AE_AML_ILLEGAL_ADDRESS. | |
1197 | * | |
1198 | * DESCRIPTION: Validate a system address via the host OS. Used to validate | |
1199 | * the addresses accessed by AML operation regions. | |
1200 | * | |
1201 | *****************************************************************************/ | |
1202 | ||
1203 | acpi_status | |
1204 | acpi_os_validate_address ( | |
1205 | u8 space_id, | |
1206 | acpi_physical_address address, | |
1207 | acpi_size length) | |
1208 | { | |
1209 | ||
1210 | return AE_OK; | |
1211 | } | |
1212 | ||
1213 | ||
73459f73 | 1214 | #endif |