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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 | ||
a6fc6720 | 140 | |
11e981f1 | 141 | extern int acpi_in_resume; |
4be44fcd | 142 | void *acpi_os_allocate(acpi_size size) |
1da177e4 | 143 | { |
11e981f1 DSL |
144 | if (acpi_in_resume) |
145 | return kmalloc(size, GFP_ATOMIC); | |
146 | else | |
147 | return kmalloc(size, GFP_KERNEL); | |
1da177e4 LT |
148 | } |
149 | ||
4be44fcd | 150 | void acpi_os_free(void *ptr) |
1da177e4 LT |
151 | { |
152 | kfree(ptr); | |
153 | } | |
4be44fcd | 154 | |
1da177e4 LT |
155 | EXPORT_SYMBOL(acpi_os_free); |
156 | ||
4be44fcd | 157 | acpi_status acpi_os_get_root_pointer(u32 flags, struct acpi_pointer *addr) |
1da177e4 LT |
158 | { |
159 | if (efi_enabled) { | |
160 | addr->pointer_type = ACPI_PHYSICAL_POINTER; | |
b2c99e3c BH |
161 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
162 | addr->pointer.physical = efi.acpi20; | |
163 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) | |
164 | addr->pointer.physical = efi.acpi; | |
1da177e4 | 165 | else { |
4be44fcd LB |
166 | printk(KERN_ERR PREFIX |
167 | "System description tables not found\n"); | |
1da177e4 LT |
168 | return AE_NOT_FOUND; |
169 | } | |
170 | } else { | |
171 | if (ACPI_FAILURE(acpi_find_root_pointer(flags, addr))) { | |
4be44fcd LB |
172 | printk(KERN_ERR PREFIX |
173 | "System description tables not found\n"); | |
1da177e4 LT |
174 | return AE_NOT_FOUND; |
175 | } | |
176 | } | |
177 | ||
178 | return AE_OK; | |
179 | } | |
180 | ||
181 | acpi_status | |
4be44fcd LB |
182 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size, |
183 | void __iomem ** virt) | |
1da177e4 | 184 | { |
9f4fd61f BH |
185 | if (phys > ULONG_MAX) { |
186 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
187 | return AE_BAD_PARAMETER; | |
1da177e4 | 188 | } |
9f4fd61f BH |
189 | /* |
190 | * ioremap checks to ensure this is in reserved space | |
191 | */ | |
192 | *virt = ioremap((unsigned long)phys, size); | |
1da177e4 LT |
193 | |
194 | if (!*virt) | |
195 | return AE_NO_MEMORY; | |
196 | ||
197 | return AE_OK; | |
198 | } | |
55a82ab3 | 199 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 200 | |
4be44fcd | 201 | void acpi_os_unmap_memory(void __iomem * virt, acpi_size size) |
1da177e4 LT |
202 | { |
203 | iounmap(virt); | |
204 | } | |
55a82ab3 | 205 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 LT |
206 | |
207 | #ifdef ACPI_FUTURE_USAGE | |
208 | acpi_status | |
4be44fcd | 209 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 210 | { |
4be44fcd | 211 | if (!phys || !virt) |
1da177e4 LT |
212 | return AE_BAD_PARAMETER; |
213 | ||
214 | *phys = virt_to_phys(virt); | |
215 | ||
216 | return AE_OK; | |
217 | } | |
218 | #endif | |
219 | ||
220 | #define ACPI_MAX_OVERRIDE_LEN 100 | |
221 | ||
222 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
223 | ||
224 | acpi_status | |
4be44fcd LB |
225 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
226 | acpi_string * new_val) | |
1da177e4 LT |
227 | { |
228 | if (!init_val || !new_val) | |
229 | return AE_BAD_PARAMETER; | |
230 | ||
231 | *new_val = NULL; | |
4be44fcd | 232 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 233 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 234 | acpi_os_name); |
1da177e4 LT |
235 | *new_val = acpi_os_name; |
236 | } | |
237 | ||
238 | return AE_OK; | |
239 | } | |
240 | ||
241 | acpi_status | |
4be44fcd LB |
242 | acpi_os_table_override(struct acpi_table_header * existing_table, |
243 | struct acpi_table_header ** new_table) | |
1da177e4 LT |
244 | { |
245 | if (!existing_table || !new_table) | |
246 | return AE_BAD_PARAMETER; | |
247 | ||
248 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
249 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
4be44fcd | 250 | *new_table = (struct acpi_table_header *)AmlCode; |
1da177e4 LT |
251 | else |
252 | *new_table = NULL; | |
253 | #else | |
254 | *new_table = NULL; | |
255 | #endif | |
256 | return AE_OK; | |
257 | } | |
258 | ||
4be44fcd | 259 | static irqreturn_t acpi_irq(int irq, void *dev_id, struct pt_regs *regs) |
1da177e4 | 260 | { |
4be44fcd | 261 | return (*acpi_irq_handler) (acpi_irq_context) ? IRQ_HANDLED : IRQ_NONE; |
1da177e4 LT |
262 | } |
263 | ||
264 | acpi_status | |
4be44fcd LB |
265 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
266 | void *context) | |
1da177e4 LT |
267 | { |
268 | unsigned int irq; | |
269 | ||
270 | /* | |
271 | * Ignore the GSI from the core, and use the value in our copy of the | |
272 | * FADT. It may not be the same if an interrupt source override exists | |
273 | * for the SCI. | |
274 | */ | |
275 | gsi = acpi_fadt.sci_int; | |
276 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { | |
277 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
278 | gsi); | |
279 | return AE_OK; | |
280 | } | |
281 | ||
282 | acpi_irq_handler = handler; | |
283 | acpi_irq_context = context; | |
284 | if (request_irq(irq, acpi_irq, SA_SHIRQ, "acpi", acpi_irq)) { | |
285 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); | |
286 | return AE_NOT_ACQUIRED; | |
287 | } | |
288 | acpi_irq_irq = irq; | |
289 | ||
290 | return AE_OK; | |
291 | } | |
292 | ||
4be44fcd | 293 | acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) |
1da177e4 LT |
294 | { |
295 | if (irq) { | |
296 | free_irq(irq, acpi_irq); | |
297 | acpi_irq_handler = NULL; | |
298 | acpi_irq_irq = 0; | |
299 | } | |
300 | ||
301 | return AE_OK; | |
302 | } | |
303 | ||
304 | /* | |
305 | * Running in interpreter thread context, safe to sleep | |
306 | */ | |
307 | ||
4be44fcd | 308 | void acpi_os_sleep(acpi_integer ms) |
1da177e4 | 309 | { |
01a527ec | 310 | schedule_timeout_interruptible(msecs_to_jiffies(ms)); |
1da177e4 | 311 | } |
4be44fcd | 312 | |
1da177e4 LT |
313 | EXPORT_SYMBOL(acpi_os_sleep); |
314 | ||
4be44fcd | 315 | void acpi_os_stall(u32 us) |
1da177e4 LT |
316 | { |
317 | while (us) { | |
318 | u32 delay = 1000; | |
319 | ||
320 | if (delay > us) | |
321 | delay = us; | |
322 | udelay(delay); | |
323 | touch_nmi_watchdog(); | |
324 | us -= delay; | |
325 | } | |
326 | } | |
4be44fcd | 327 | |
1da177e4 LT |
328 | EXPORT_SYMBOL(acpi_os_stall); |
329 | ||
330 | /* | |
331 | * Support ACPI 3.0 AML Timer operand | |
332 | * Returns 64-bit free-running, monotonically increasing timer | |
333 | * with 100ns granularity | |
334 | */ | |
4be44fcd | 335 | u64 acpi_os_get_timer(void) |
1da177e4 LT |
336 | { |
337 | static u64 t; | |
338 | ||
339 | #ifdef CONFIG_HPET | |
340 | /* TBD: use HPET if available */ | |
341 | #endif | |
342 | ||
343 | #ifdef CONFIG_X86_PM_TIMER | |
344 | /* TBD: default to PM timer if HPET was not available */ | |
345 | #endif | |
346 | if (!t) | |
347 | printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n"); | |
348 | ||
349 | return ++t; | |
350 | } | |
351 | ||
4be44fcd | 352 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
353 | { |
354 | u32 dummy; | |
355 | ||
356 | if (!value) | |
357 | value = &dummy; | |
358 | ||
4be44fcd | 359 | switch (width) { |
1da177e4 | 360 | case 8: |
4be44fcd | 361 | *(u8 *) value = inb(port); |
1da177e4 LT |
362 | break; |
363 | case 16: | |
4be44fcd | 364 | *(u16 *) value = inw(port); |
1da177e4 LT |
365 | break; |
366 | case 32: | |
4be44fcd | 367 | *(u32 *) value = inl(port); |
1da177e4 LT |
368 | break; |
369 | default: | |
370 | BUG(); | |
371 | } | |
372 | ||
373 | return AE_OK; | |
374 | } | |
4be44fcd | 375 | |
1da177e4 LT |
376 | EXPORT_SYMBOL(acpi_os_read_port); |
377 | ||
4be44fcd | 378 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 379 | { |
4be44fcd | 380 | switch (width) { |
1da177e4 LT |
381 | case 8: |
382 | outb(value, port); | |
383 | break; | |
384 | case 16: | |
385 | outw(value, port); | |
386 | break; | |
387 | case 32: | |
388 | outl(value, port); | |
389 | break; | |
390 | default: | |
391 | BUG(); | |
392 | } | |
393 | ||
394 | return AE_OK; | |
395 | } | |
4be44fcd | 396 | |
1da177e4 LT |
397 | EXPORT_SYMBOL(acpi_os_write_port); |
398 | ||
399 | acpi_status | |
4be44fcd | 400 | acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width) |
1da177e4 | 401 | { |
4be44fcd LB |
402 | u32 dummy; |
403 | void __iomem *virt_addr; | |
1da177e4 | 404 | |
9f4fd61f | 405 | virt_addr = ioremap(phys_addr, width); |
1da177e4 LT |
406 | if (!value) |
407 | value = &dummy; | |
408 | ||
409 | switch (width) { | |
410 | case 8: | |
4be44fcd | 411 | *(u8 *) value = readb(virt_addr); |
1da177e4 LT |
412 | break; |
413 | case 16: | |
4be44fcd | 414 | *(u16 *) value = readw(virt_addr); |
1da177e4 LT |
415 | break; |
416 | case 32: | |
4be44fcd | 417 | *(u32 *) value = readl(virt_addr); |
1da177e4 LT |
418 | break; |
419 | default: | |
420 | BUG(); | |
421 | } | |
422 | ||
9f4fd61f | 423 | iounmap(virt_addr); |
1da177e4 LT |
424 | |
425 | return AE_OK; | |
426 | } | |
427 | ||
428 | acpi_status | |
4be44fcd | 429 | acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width) |
1da177e4 | 430 | { |
4be44fcd | 431 | void __iomem *virt_addr; |
1da177e4 | 432 | |
9f4fd61f | 433 | virt_addr = ioremap(phys_addr, width); |
1da177e4 LT |
434 | |
435 | switch (width) { | |
436 | case 8: | |
437 | writeb(value, virt_addr); | |
438 | break; | |
439 | case 16: | |
440 | writew(value, virt_addr); | |
441 | break; | |
442 | case 32: | |
443 | writel(value, virt_addr); | |
444 | break; | |
445 | default: | |
446 | BUG(); | |
447 | } | |
448 | ||
9f4fd61f | 449 | iounmap(virt_addr); |
1da177e4 LT |
450 | |
451 | return AE_OK; | |
452 | } | |
453 | ||
1da177e4 | 454 | acpi_status |
4be44fcd LB |
455 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
456 | void *value, u32 width) | |
1da177e4 LT |
457 | { |
458 | int result, size; | |
459 | ||
460 | if (!value) | |
461 | return AE_BAD_PARAMETER; | |
462 | ||
463 | switch (width) { | |
464 | case 8: | |
465 | size = 1; | |
466 | break; | |
467 | case 16: | |
468 | size = 2; | |
469 | break; | |
470 | case 32: | |
471 | size = 4; | |
472 | break; | |
473 | default: | |
474 | return AE_ERROR; | |
475 | } | |
476 | ||
477 | BUG_ON(!raw_pci_ops); | |
478 | ||
479 | result = raw_pci_ops->read(pci_id->segment, pci_id->bus, | |
4be44fcd LB |
480 | PCI_DEVFN(pci_id->device, pci_id->function), |
481 | reg, size, value); | |
1da177e4 LT |
482 | |
483 | return (result ? AE_ERROR : AE_OK); | |
484 | } | |
4be44fcd | 485 | |
1da177e4 LT |
486 | EXPORT_SYMBOL(acpi_os_read_pci_configuration); |
487 | ||
488 | acpi_status | |
4be44fcd LB |
489 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
490 | acpi_integer value, u32 width) | |
1da177e4 LT |
491 | { |
492 | int result, size; | |
493 | ||
494 | switch (width) { | |
495 | case 8: | |
496 | size = 1; | |
497 | break; | |
498 | case 16: | |
499 | size = 2; | |
500 | break; | |
501 | case 32: | |
502 | size = 4; | |
503 | break; | |
504 | default: | |
505 | return AE_ERROR; | |
506 | } | |
507 | ||
508 | BUG_ON(!raw_pci_ops); | |
509 | ||
510 | result = raw_pci_ops->write(pci_id->segment, pci_id->bus, | |
4be44fcd LB |
511 | PCI_DEVFN(pci_id->device, pci_id->function), |
512 | reg, size, value); | |
1da177e4 LT |
513 | |
514 | return (result ? AE_ERROR : AE_OK); | |
515 | } | |
516 | ||
517 | /* TODO: Change code to take advantage of driver model more */ | |
4be44fcd LB |
518 | static void acpi_os_derive_pci_id_2(acpi_handle rhandle, /* upper bound */ |
519 | acpi_handle chandle, /* current node */ | |
520 | struct acpi_pci_id **id, | |
521 | int *is_bridge, u8 * bus_number) | |
1da177e4 | 522 | { |
4be44fcd LB |
523 | acpi_handle handle; |
524 | struct acpi_pci_id *pci_id = *id; | |
525 | acpi_status status; | |
526 | unsigned long temp; | |
527 | acpi_object_type type; | |
528 | u8 tu8; | |
1da177e4 LT |
529 | |
530 | acpi_get_parent(chandle, &handle); | |
531 | if (handle != rhandle) { | |
4be44fcd LB |
532 | acpi_os_derive_pci_id_2(rhandle, handle, &pci_id, is_bridge, |
533 | bus_number); | |
1da177e4 LT |
534 | |
535 | status = acpi_get_type(handle, &type); | |
4be44fcd | 536 | if ((ACPI_FAILURE(status)) || (type != ACPI_TYPE_DEVICE)) |
1da177e4 LT |
537 | return; |
538 | ||
4be44fcd LB |
539 | status = |
540 | acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, | |
541 | &temp); | |
1da177e4 | 542 | if (ACPI_SUCCESS(status)) { |
4be44fcd LB |
543 | pci_id->device = ACPI_HIWORD(ACPI_LODWORD(temp)); |
544 | pci_id->function = ACPI_LOWORD(ACPI_LODWORD(temp)); | |
1da177e4 LT |
545 | |
546 | if (*is_bridge) | |
547 | pci_id->bus = *bus_number; | |
548 | ||
549 | /* any nicer way to get bus number of bridge ? */ | |
4be44fcd LB |
550 | status = |
551 | acpi_os_read_pci_configuration(pci_id, 0x0e, &tu8, | |
552 | 8); | |
553 | if (ACPI_SUCCESS(status) | |
554 | && ((tu8 & 0x7f) == 1 || (tu8 & 0x7f) == 2)) { | |
555 | status = | |
556 | acpi_os_read_pci_configuration(pci_id, 0x18, | |
557 | &tu8, 8); | |
1da177e4 LT |
558 | if (!ACPI_SUCCESS(status)) { |
559 | /* Certainly broken... FIX ME */ | |
560 | return; | |
561 | } | |
562 | *is_bridge = 1; | |
563 | pci_id->bus = tu8; | |
4be44fcd LB |
564 | status = |
565 | acpi_os_read_pci_configuration(pci_id, 0x19, | |
566 | &tu8, 8); | |
1da177e4 LT |
567 | if (ACPI_SUCCESS(status)) { |
568 | *bus_number = tu8; | |
569 | } | |
570 | } else | |
571 | *is_bridge = 0; | |
572 | } | |
573 | } | |
574 | } | |
575 | ||
4be44fcd LB |
576 | void acpi_os_derive_pci_id(acpi_handle rhandle, /* upper bound */ |
577 | acpi_handle chandle, /* current node */ | |
578 | struct acpi_pci_id **id) | |
1da177e4 LT |
579 | { |
580 | int is_bridge = 1; | |
581 | u8 bus_number = (*id)->bus; | |
582 | ||
583 | acpi_os_derive_pci_id_2(rhandle, chandle, id, &is_bridge, &bus_number); | |
584 | } | |
585 | ||
4be44fcd | 586 | static void acpi_os_execute_deferred(void *context) |
1da177e4 | 587 | { |
4be44fcd | 588 | struct acpi_os_dpc *dpc = NULL; |
1da177e4 | 589 | |
4be44fcd | 590 | ACPI_FUNCTION_TRACE("os_execute_deferred"); |
1da177e4 | 591 | |
4be44fcd | 592 | dpc = (struct acpi_os_dpc *)context; |
1da177e4 | 593 | if (!dpc) { |
6468463a | 594 | printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); |
1da177e4 LT |
595 | return_VOID; |
596 | } | |
597 | ||
598 | dpc->function(dpc->context); | |
599 | ||
600 | kfree(dpc); | |
601 | ||
602 | return_VOID; | |
603 | } | |
604 | ||
b8d35192 AS |
605 | static int acpi_os_execute_thread(void *context) |
606 | { | |
607 | struct acpi_os_dpc *dpc = (struct acpi_os_dpc *)context; | |
608 | if (dpc) { | |
609 | dpc->function(dpc->context); | |
610 | kfree(dpc); | |
611 | } | |
612 | do_exit(0); | |
613 | } | |
614 | ||
615 | /******************************************************************************* | |
616 | * | |
617 | * FUNCTION: acpi_os_execute | |
618 | * | |
619 | * PARAMETERS: Type - Type of the callback | |
620 | * Function - Function to be executed | |
621 | * Context - Function parameters | |
622 | * | |
623 | * RETURN: Status | |
624 | * | |
625 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
626 | * immediately executes function on a separate thread. | |
627 | * | |
628 | ******************************************************************************/ | |
629 | ||
630 | acpi_status acpi_os_execute(acpi_execute_type type, | |
4be44fcd | 631 | acpi_osd_exec_callback function, void *context) |
1da177e4 | 632 | { |
4be44fcd LB |
633 | acpi_status status = AE_OK; |
634 | struct acpi_os_dpc *dpc; | |
635 | struct work_struct *task; | |
b8d35192 | 636 | struct task_struct *p; |
1da177e4 LT |
637 | |
638 | if (!function) | |
b8d35192 | 639 | return AE_BAD_PARAMETER; |
1da177e4 LT |
640 | /* |
641 | * Allocate/initialize DPC structure. Note that this memory will be | |
642 | * freed by the callee. The kernel handles the tq_struct list in a | |
643 | * way that allows us to also free its memory inside the callee. | |
644 | * Because we may want to schedule several tasks with different | |
645 | * parameters we can't use the approach some kernel code uses of | |
646 | * having a static tq_struct. | |
647 | * We can save time and code by allocating the DPC and tq_structs | |
648 | * from the same memory. | |
649 | */ | |
b8d35192 AS |
650 | if (type == OSL_NOTIFY_HANDLER) { |
651 | dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_KERNEL); | |
652 | } else { | |
653 | dpc = kmalloc(sizeof(struct acpi_os_dpc) + | |
654 | sizeof(struct work_struct), GFP_ATOMIC); | |
655 | } | |
1da177e4 | 656 | if (!dpc) |
b8d35192 | 657 | return AE_NO_MEMORY; |
1da177e4 LT |
658 | dpc->function = function; |
659 | dpc->context = context; | |
660 | ||
b8d35192 AS |
661 | if (type == OSL_NOTIFY_HANDLER) { |
662 | p = kthread_create(acpi_os_execute_thread, dpc, "kacpid_notify"); | |
663 | if (!IS_ERR(p)) { | |
664 | wake_up_process(p); | |
665 | } else { | |
666 | status = AE_NO_MEMORY; | |
667 | kfree(dpc); | |
668 | } | |
669 | } else { | |
670 | task = (void *)(dpc + 1); | |
671 | INIT_WORK(task, acpi_os_execute_deferred, (void *)dpc); | |
672 | if (!queue_work(kacpid_wq, task)) { | |
673 | status = AE_ERROR; | |
674 | kfree(dpc); | |
675 | } | |
1da177e4 | 676 | } |
b8d35192 | 677 | return status; |
1da177e4 | 678 | } |
4be44fcd | 679 | |
b8d35192 | 680 | EXPORT_SYMBOL(acpi_os_execute); |
1da177e4 | 681 | |
4be44fcd | 682 | void acpi_os_wait_events_complete(void *context) |
1da177e4 LT |
683 | { |
684 | flush_workqueue(kacpid_wq); | |
685 | } | |
4be44fcd | 686 | |
1da177e4 LT |
687 | EXPORT_SYMBOL(acpi_os_wait_events_complete); |
688 | ||
689 | /* | |
690 | * Allocate the memory for a spinlock and initialize it. | |
691 | */ | |
4be44fcd | 692 | acpi_status acpi_os_create_lock(acpi_handle * out_handle) |
1da177e4 LT |
693 | { |
694 | spinlock_t *lock_ptr; | |
695 | ||
4be44fcd | 696 | ACPI_FUNCTION_TRACE("os_create_lock"); |
1da177e4 LT |
697 | |
698 | lock_ptr = acpi_os_allocate(sizeof(spinlock_t)); | |
699 | ||
700 | spin_lock_init(lock_ptr); | |
701 | ||
4be44fcd | 702 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating spinlock[%p].\n", lock_ptr)); |
1da177e4 LT |
703 | |
704 | *out_handle = lock_ptr; | |
705 | ||
4be44fcd | 706 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
707 | } |
708 | ||
1da177e4 LT |
709 | /* |
710 | * Deallocate the memory for a spinlock. | |
711 | */ | |
4be44fcd | 712 | void acpi_os_delete_lock(acpi_handle handle) |
1da177e4 | 713 | { |
4be44fcd | 714 | ACPI_FUNCTION_TRACE("os_create_lock"); |
1da177e4 | 715 | |
4be44fcd | 716 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting spinlock[%p].\n", handle)); |
1da177e4 LT |
717 | |
718 | acpi_os_free(handle); | |
719 | ||
720 | return_VOID; | |
721 | } | |
722 | ||
1da177e4 | 723 | acpi_status |
4be44fcd | 724 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 725 | { |
4be44fcd | 726 | struct semaphore *sem = NULL; |
1da177e4 | 727 | |
4be44fcd | 728 | ACPI_FUNCTION_TRACE("os_create_semaphore"); |
1da177e4 LT |
729 | |
730 | sem = acpi_os_allocate(sizeof(struct semaphore)); | |
731 | if (!sem) | |
4be44fcd | 732 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
733 | memset(sem, 0, sizeof(struct semaphore)); |
734 | ||
735 | sema_init(sem, initial_units); | |
736 | ||
4be44fcd | 737 | *handle = (acpi_handle *) sem; |
1da177e4 | 738 | |
4be44fcd LB |
739 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
740 | *handle, initial_units)); | |
1da177e4 | 741 | |
4be44fcd | 742 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 743 | } |
1da177e4 | 744 | |
4be44fcd | 745 | EXPORT_SYMBOL(acpi_os_create_semaphore); |
1da177e4 LT |
746 | |
747 | /* | |
748 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
749 | * 'delete_semaphore()' function -- may result in an invalid | |
750 | * pointer dereference for non-synchronized consumers. Should | |
751 | * we at least check for blocked threads and signal/cancel them? | |
752 | */ | |
753 | ||
4be44fcd | 754 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 755 | { |
4be44fcd | 756 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 757 | |
4be44fcd | 758 | ACPI_FUNCTION_TRACE("os_delete_semaphore"); |
1da177e4 LT |
759 | |
760 | if (!sem) | |
4be44fcd | 761 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 | 762 | |
4be44fcd | 763 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 764 | |
4be44fcd LB |
765 | acpi_os_free(sem); |
766 | sem = NULL; | |
1da177e4 | 767 | |
4be44fcd | 768 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 769 | } |
1da177e4 | 770 | |
4be44fcd | 771 | EXPORT_SYMBOL(acpi_os_delete_semaphore); |
1da177e4 LT |
772 | |
773 | /* | |
774 | * TODO: The kernel doesn't have a 'down_timeout' function -- had to | |
775 | * improvise. The process is to sleep for one scheduler quantum | |
776 | * until the semaphore becomes available. Downside is that this | |
777 | * may result in starvation for timeout-based waits when there's | |
778 | * lots of semaphore activity. | |
779 | * | |
780 | * TODO: Support for units > 1? | |
781 | */ | |
4be44fcd | 782 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 783 | { |
4be44fcd LB |
784 | acpi_status status = AE_OK; |
785 | struct semaphore *sem = (struct semaphore *)handle; | |
786 | int ret = 0; | |
1da177e4 | 787 | |
4be44fcd | 788 | ACPI_FUNCTION_TRACE("os_wait_semaphore"); |
1da177e4 LT |
789 | |
790 | if (!sem || (units < 1)) | |
4be44fcd | 791 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
792 | |
793 | if (units > 1) | |
4be44fcd | 794 | return_ACPI_STATUS(AE_SUPPORT); |
1da177e4 | 795 | |
4be44fcd LB |
796 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
797 | handle, units, timeout)); | |
1da177e4 | 798 | |
4be44fcd | 799 | switch (timeout) { |
1da177e4 LT |
800 | /* |
801 | * No Wait: | |
802 | * -------- | |
803 | * A zero timeout value indicates that we shouldn't wait - just | |
804 | * acquire the semaphore if available otherwise return AE_TIME | |
805 | * (a.k.a. 'would block'). | |
806 | */ | |
4be44fcd LB |
807 | case 0: |
808 | if (down_trylock(sem)) | |
1da177e4 LT |
809 | status = AE_TIME; |
810 | break; | |
811 | ||
812 | /* | |
813 | * Wait Indefinitely: | |
814 | * ------------------ | |
815 | */ | |
4be44fcd | 816 | case ACPI_WAIT_FOREVER: |
1da177e4 LT |
817 | down(sem); |
818 | break; | |
819 | ||
820 | /* | |
821 | * Wait w/ Timeout: | |
822 | * ---------------- | |
823 | */ | |
4be44fcd | 824 | default: |
1da177e4 LT |
825 | // TODO: A better timeout algorithm? |
826 | { | |
827 | int i = 0; | |
4be44fcd | 828 | static const int quantum_ms = 1000 / HZ; |
1da177e4 LT |
829 | |
830 | ret = down_trylock(sem); | |
dacd9b80 | 831 | for (i = timeout; (i > 0 && ret != 0); i -= quantum_ms) { |
01a527ec | 832 | schedule_timeout_interruptible(1); |
1da177e4 LT |
833 | ret = down_trylock(sem); |
834 | } | |
4be44fcd | 835 | |
1da177e4 LT |
836 | if (ret != 0) |
837 | status = AE_TIME; | |
838 | } | |
839 | break; | |
840 | } | |
841 | ||
842 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 843 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 844 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
845 | handle, units, timeout, |
846 | acpi_format_exception(status))); | |
847 | } else { | |
848 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 849 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 850 | units, timeout)); |
1da177e4 LT |
851 | } |
852 | ||
4be44fcd | 853 | return_ACPI_STATUS(status); |
1da177e4 | 854 | } |
1da177e4 | 855 | |
4be44fcd | 856 | EXPORT_SYMBOL(acpi_os_wait_semaphore); |
1da177e4 LT |
857 | |
858 | /* | |
859 | * TODO: Support for units > 1? | |
860 | */ | |
4be44fcd | 861 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 862 | { |
4be44fcd | 863 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 864 | |
4be44fcd | 865 | ACPI_FUNCTION_TRACE("os_signal_semaphore"); |
1da177e4 LT |
866 | |
867 | if (!sem || (units < 1)) | |
4be44fcd | 868 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
869 | |
870 | if (units > 1) | |
4be44fcd | 871 | return_ACPI_STATUS(AE_SUPPORT); |
1da177e4 | 872 | |
4be44fcd LB |
873 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
874 | units)); | |
1da177e4 LT |
875 | |
876 | up(sem); | |
877 | ||
4be44fcd | 878 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 879 | } |
4be44fcd | 880 | |
1da177e4 LT |
881 | EXPORT_SYMBOL(acpi_os_signal_semaphore); |
882 | ||
883 | #ifdef ACPI_FUTURE_USAGE | |
4be44fcd | 884 | u32 acpi_os_get_line(char *buffer) |
1da177e4 LT |
885 | { |
886 | ||
887 | #ifdef ENABLE_DEBUGGER | |
888 | if (acpi_in_debugger) { | |
889 | u32 chars; | |
890 | ||
891 | kdb_read(buffer, sizeof(line_buf)); | |
892 | ||
893 | /* remove the CR kdb includes */ | |
894 | chars = strlen(buffer) - 1; | |
895 | buffer[chars] = '\0'; | |
896 | } | |
897 | #endif | |
898 | ||
899 | return 0; | |
900 | } | |
4be44fcd | 901 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 LT |
902 | |
903 | /* Assumes no unreadable holes inbetween */ | |
4be44fcd | 904 | u8 acpi_os_readable(void *ptr, acpi_size len) |
1da177e4 | 905 | { |
4be44fcd | 906 | #if defined(__i386__) || defined(__x86_64__) |
1da177e4 | 907 | char tmp; |
4be44fcd LB |
908 | return !__get_user(tmp, (char __user *)ptr) |
909 | && !__get_user(tmp, (char __user *)ptr + len - 1); | |
1da177e4 LT |
910 | #endif |
911 | return 1; | |
912 | } | |
913 | ||
914 | #ifdef ACPI_FUTURE_USAGE | |
4be44fcd | 915 | u8 acpi_os_writable(void *ptr, acpi_size len) |
1da177e4 LT |
916 | { |
917 | /* could do dummy write (racy) or a kernel page table lookup. | |
918 | The later may be difficult at early boot when kmap doesn't work yet. */ | |
919 | return 1; | |
920 | } | |
921 | #endif | |
922 | ||
4be44fcd | 923 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 924 | { |
4be44fcd | 925 | switch (function) { |
1da177e4 LT |
926 | case ACPI_SIGNAL_FATAL: |
927 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
928 | break; | |
929 | case ACPI_SIGNAL_BREAKPOINT: | |
930 | /* | |
931 | * AML Breakpoint | |
932 | * ACPI spec. says to treat it as a NOP unless | |
933 | * you are debugging. So if/when we integrate | |
934 | * AML debugger into the kernel debugger its | |
935 | * hook will go here. But until then it is | |
936 | * not useful to print anything on breakpoints. | |
937 | */ | |
938 | break; | |
939 | default: | |
940 | break; | |
941 | } | |
942 | ||
943 | return AE_OK; | |
944 | } | |
4be44fcd | 945 | |
1da177e4 LT |
946 | EXPORT_SYMBOL(acpi_os_signal); |
947 | ||
4be44fcd | 948 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
949 | { |
950 | char *p = acpi_os_name; | |
4be44fcd | 951 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
952 | |
953 | if (!str || !*str) | |
954 | return 0; | |
955 | ||
956 | for (; count-- && str && *str; str++) { | |
957 | if (isalnum(*str) || *str == ' ' || *str == ':') | |
958 | *p++ = *str; | |
959 | else if (*str == '\'' || *str == '"') | |
960 | continue; | |
961 | else | |
962 | break; | |
963 | } | |
964 | *p = 0; | |
965 | ||
966 | return 1; | |
4be44fcd | 967 | |
1da177e4 LT |
968 | } |
969 | ||
970 | __setup("acpi_os_name=", acpi_os_name_setup); | |
971 | ||
972 | /* | |
973 | * _OSI control | |
974 | * empty string disables _OSI | |
975 | * TBD additional string adds to _OSI | |
976 | */ | |
4be44fcd | 977 | static int __init acpi_osi_setup(char *str) |
1da177e4 LT |
978 | { |
979 | if (str == NULL || *str == '\0') { | |
980 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
981 | acpi_gbl_create_osi_method = FALSE; | |
4be44fcd | 982 | } else { |
1da177e4 | 983 | /* TBD */ |
4be44fcd LB |
984 | printk(KERN_ERR PREFIX "_OSI additional string ignored -- %s\n", |
985 | str); | |
1da177e4 LT |
986 | } |
987 | ||
988 | return 1; | |
989 | } | |
990 | ||
991 | __setup("acpi_osi=", acpi_osi_setup); | |
992 | ||
993 | /* enable serialization to combat AE_ALREADY_EXISTS errors */ | |
4be44fcd | 994 | static int __init acpi_serialize_setup(char *str) |
1da177e4 LT |
995 | { |
996 | printk(KERN_INFO PREFIX "serialize enabled\n"); | |
997 | ||
998 | acpi_gbl_all_methods_serialized = TRUE; | |
999 | ||
1000 | return 1; | |
1001 | } | |
1002 | ||
1003 | __setup("acpi_serialize", acpi_serialize_setup); | |
1004 | ||
1005 | /* | |
1006 | * Wake and Run-Time GPES are expected to be separate. | |
1007 | * We disable wake-GPEs at run-time to prevent spurious | |
1008 | * interrupts. | |
1009 | * | |
1010 | * However, if a system exists that shares Wake and | |
1011 | * Run-time events on the same GPE this flag is available | |
1012 | * to tell Linux to keep the wake-time GPEs enabled at run-time. | |
1013 | */ | |
4be44fcd | 1014 | static int __init acpi_wake_gpes_always_on_setup(char *str) |
1da177e4 LT |
1015 | { |
1016 | printk(KERN_INFO PREFIX "wake GPEs not disabled\n"); | |
1017 | ||
1018 | acpi_gbl_leave_wake_gpes_disabled = FALSE; | |
1019 | ||
1020 | return 1; | |
1021 | } | |
1022 | ||
1023 | __setup("acpi_wake_gpes_always_on", acpi_wake_gpes_always_on_setup); | |
1024 | ||
8713cbef | 1025 | static int __init acpi_hotkey_setup(char *str) |
fb9802fa | 1026 | { |
30e332f3 | 1027 | acpi_specific_hotkey_enabled = FALSE; |
fb9802fa LY |
1028 | return 1; |
1029 | } | |
1030 | ||
30e332f3 | 1031 | __setup("acpi_generic_hotkey", acpi_hotkey_setup); |
fb9802fa | 1032 | |
1da177e4 LT |
1033 | /* |
1034 | * max_cstate is defined in the base kernel so modules can | |
1035 | * change it w/o depending on the state of the processor module. | |
1036 | */ | |
1037 | unsigned int max_cstate = ACPI_PROCESSOR_MAX_POWER; | |
1038 | ||
1da177e4 | 1039 | EXPORT_SYMBOL(max_cstate); |
73459f73 RM |
1040 | |
1041 | /* | |
1042 | * Acquire a spinlock. | |
1043 | * | |
1044 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1045 | */ |
1046 | ||
b8e4d893 | 1047 | acpi_cpu_flags acpi_os_acquire_lock(acpi_handle handle) |
73459f73 | 1048 | { |
b8e4d893 | 1049 | acpi_cpu_flags flags; |
4be44fcd | 1050 | spin_lock_irqsave((spinlock_t *) handle, flags); |
73459f73 RM |
1051 | return flags; |
1052 | } | |
1053 | ||
1054 | /* | |
1055 | * Release a spinlock. See above. | |
1056 | */ | |
1057 | ||
b8e4d893 | 1058 | void acpi_os_release_lock(acpi_handle handle, acpi_cpu_flags flags) |
73459f73 | 1059 | { |
b8e4d893 | 1060 | spin_unlock_irqrestore((spinlock_t *) handle, flags); |
73459f73 RM |
1061 | } |
1062 | ||
73459f73 RM |
1063 | #ifndef ACPI_USE_LOCAL_CACHE |
1064 | ||
1065 | /******************************************************************************* | |
1066 | * | |
1067 | * FUNCTION: acpi_os_create_cache | |
1068 | * | |
b229cf92 BM |
1069 | * PARAMETERS: name - Ascii name for the cache |
1070 | * size - Size of each cached object | |
1071 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1072 | * cache - Where the new cache object is returned | |
73459f73 | 1073 | * |
b229cf92 | 1074 | * RETURN: status |
73459f73 RM |
1075 | * |
1076 | * DESCRIPTION: Create a cache object | |
1077 | * | |
1078 | ******************************************************************************/ | |
1079 | ||
1080 | acpi_status | |
4be44fcd | 1081 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1082 | { |
4be44fcd | 1083 | *cache = kmem_cache_create(name, size, 0, 0, NULL, NULL); |
b229cf92 BM |
1084 | if (cache == NULL) |
1085 | return AE_ERROR; | |
1086 | else | |
1087 | return AE_OK; | |
73459f73 RM |
1088 | } |
1089 | ||
1090 | /******************************************************************************* | |
1091 | * | |
1092 | * FUNCTION: acpi_os_purge_cache | |
1093 | * | |
1094 | * PARAMETERS: Cache - Handle to cache object | |
1095 | * | |
1096 | * RETURN: Status | |
1097 | * | |
1098 | * DESCRIPTION: Free all objects within the requested cache. | |
1099 | * | |
1100 | ******************************************************************************/ | |
1101 | ||
4be44fcd | 1102 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1103 | { |
4be44fcd LB |
1104 | (void)kmem_cache_shrink(cache); |
1105 | return (AE_OK); | |
73459f73 RM |
1106 | } |
1107 | ||
1108 | /******************************************************************************* | |
1109 | * | |
1110 | * FUNCTION: acpi_os_delete_cache | |
1111 | * | |
1112 | * PARAMETERS: Cache - Handle to cache object | |
1113 | * | |
1114 | * RETURN: Status | |
1115 | * | |
1116 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1117 | * cache object. | |
1118 | * | |
1119 | ******************************************************************************/ | |
1120 | ||
4be44fcd | 1121 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1122 | { |
4be44fcd LB |
1123 | (void)kmem_cache_destroy(cache); |
1124 | return (AE_OK); | |
73459f73 RM |
1125 | } |
1126 | ||
1127 | /******************************************************************************* | |
1128 | * | |
1129 | * FUNCTION: acpi_os_release_object | |
1130 | * | |
1131 | * PARAMETERS: Cache - Handle to cache object | |
1132 | * Object - The object to be released | |
1133 | * | |
1134 | * RETURN: None | |
1135 | * | |
1136 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1137 | * the object is deleted. | |
1138 | * | |
1139 | ******************************************************************************/ | |
1140 | ||
4be44fcd | 1141 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1142 | { |
4be44fcd LB |
1143 | kmem_cache_free(cache, object); |
1144 | return (AE_OK); | |
73459f73 RM |
1145 | } |
1146 | ||
1147 | /******************************************************************************* | |
1148 | * | |
1149 | * FUNCTION: acpi_os_acquire_object | |
1150 | * | |
1151 | * PARAMETERS: Cache - Handle to cache object | |
1152 | * ReturnObject - Where the object is returned | |
1153 | * | |
1154 | * RETURN: Status | |
1155 | * | |
61686124 | 1156 | * DESCRIPTION: Return a zero-filled object. |
73459f73 RM |
1157 | * |
1158 | ******************************************************************************/ | |
1159 | ||
4be44fcd | 1160 | void *acpi_os_acquire_object(acpi_cache_t * cache) |
73459f73 | 1161 | { |
61686124 | 1162 | void *object = kmem_cache_zalloc(cache, GFP_KERNEL); |
4be44fcd LB |
1163 | WARN_ON(!object); |
1164 | return object; | |
73459f73 RM |
1165 | } |
1166 | ||
b229cf92 BM |
1167 | /****************************************************************************** |
1168 | * | |
1169 | * FUNCTION: acpi_os_validate_interface | |
1170 | * | |
1171 | * PARAMETERS: interface - Requested interface to be validated | |
1172 | * | |
1173 | * RETURN: AE_OK if interface is supported, AE_SUPPORT otherwise | |
1174 | * | |
1175 | * DESCRIPTION: Match an interface string to the interfaces supported by the | |
1176 | * host. Strings originate from an AML call to the _OSI method. | |
1177 | * | |
1178 | *****************************************************************************/ | |
1179 | ||
1180 | acpi_status | |
1181 | acpi_os_validate_interface (char *interface) | |
1182 | { | |
1183 | ||
1184 | return AE_SUPPORT; | |
1185 | } | |
1186 | ||
1187 | ||
1188 | /****************************************************************************** | |
1189 | * | |
1190 | * FUNCTION: acpi_os_validate_address | |
1191 | * | |
1192 | * PARAMETERS: space_id - ACPI space ID | |
1193 | * address - Physical address | |
1194 | * length - Address length | |
1195 | * | |
1196 | * RETURN: AE_OK if address/length is valid for the space_id. Otherwise, | |
1197 | * should return AE_AML_ILLEGAL_ADDRESS. | |
1198 | * | |
1199 | * DESCRIPTION: Validate a system address via the host OS. Used to validate | |
1200 | * the addresses accessed by AML operation regions. | |
1201 | * | |
1202 | *****************************************************************************/ | |
1203 | ||
1204 | acpi_status | |
1205 | acpi_os_validate_address ( | |
1206 | u8 space_id, | |
1207 | acpi_physical_address address, | |
1208 | acpi_size length) | |
1209 | { | |
1210 | ||
1211 | return AE_OK; | |
1212 | } | |
1213 | ||
1214 | ||
73459f73 | 1215 | #endif |