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1da177e4 LT |
1 | /* |
2 | * acpi_processor.c - ACPI Processor Driver ($Revision: 71 $) | |
3 | * | |
4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
6 | * Copyright (C) 2004 Dominik Brodowski <linux@brodo.de> | |
7 | * Copyright (C) 2004 Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> | |
8 | * - Added processor hotplug support | |
9 | * | |
10 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or (at | |
15 | * your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, but | |
18 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
20 | * General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License along | |
23 | * with this program; if not, write to the Free Software Foundation, Inc., | |
24 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
25 | * | |
26 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
27 | * TBD: | |
28 | * 1. Make # power states dynamic. | |
29 | * 2. Support duty_cycle values that span bit 4. | |
30 | * 3. Optimize by having scheduler determine business instead of | |
31 | * having us try to calculate it here. | |
32 | * 4. Need C1 timing -- must modify kernel (IRQ handler) to get this. | |
33 | */ | |
34 | ||
35 | #include <linux/kernel.h> | |
36 | #include <linux/module.h> | |
37 | #include <linux/init.h> | |
38 | #include <linux/types.h> | |
39 | #include <linux/pci.h> | |
40 | #include <linux/pm.h> | |
41 | #include <linux/cpufreq.h> | |
42 | #include <linux/cpu.h> | |
43 | #include <linux/proc_fs.h> | |
44 | #include <linux/seq_file.h> | |
45 | #include <linux/dmi.h> | |
46 | #include <linux/moduleparam.h> | |
4f86d3a8 | 47 | #include <linux/cpuidle.h> |
1da177e4 LT |
48 | |
49 | #include <asm/io.h> | |
50 | #include <asm/system.h> | |
51 | #include <asm/cpu.h> | |
52 | #include <asm/delay.h> | |
53 | #include <asm/uaccess.h> | |
54 | #include <asm/processor.h> | |
55 | #include <asm/smp.h> | |
56 | #include <asm/acpi.h> | |
57 | ||
58 | #include <acpi/acpi_bus.h> | |
59 | #include <acpi/acpi_drivers.h> | |
60 | #include <acpi/processor.h> | |
61 | ||
a192a958 LB |
62 | #define PREFIX "ACPI: " |
63 | ||
1da177e4 | 64 | #define ACPI_PROCESSOR_CLASS "processor" |
1da177e4 LT |
65 | #define ACPI_PROCESSOR_DEVICE_NAME "Processor" |
66 | #define ACPI_PROCESSOR_FILE_INFO "info" | |
67 | #define ACPI_PROCESSOR_FILE_THROTTLING "throttling" | |
68 | #define ACPI_PROCESSOR_FILE_LIMIT "limit" | |
69 | #define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80 | |
70 | #define ACPI_PROCESSOR_NOTIFY_POWER 0x81 | |
01854e69 | 71 | #define ACPI_PROCESSOR_NOTIFY_THROTTLING 0x82 |
1da177e4 LT |
72 | |
73 | #define ACPI_PROCESSOR_LIMIT_USER 0 | |
74 | #define ACPI_PROCESSOR_LIMIT_THERMAL 1 | |
75 | ||
1da177e4 | 76 | #define _COMPONENT ACPI_PROCESSOR_COMPONENT |
0131aa3d | 77 | ACPI_MODULE_NAME("processor_driver"); |
1da177e4 | 78 | |
f52fd66d | 79 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 80 | MODULE_DESCRIPTION("ACPI Processor Driver"); |
1da177e4 LT |
81 | MODULE_LICENSE("GPL"); |
82 | ||
4be44fcd | 83 | static int acpi_processor_add(struct acpi_device *device); |
4be44fcd | 84 | static int acpi_processor_remove(struct acpi_device *device, int type); |
74cad4ee | 85 | #ifdef CONFIG_ACPI_PROCFS |
1da177e4 | 86 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file); |
74cad4ee | 87 | #endif |
7ec0a729 | 88 | static void acpi_processor_notify(struct acpi_device *device, u32 event); |
1da177e4 LT |
89 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu); |
90 | static int acpi_processor_handle_eject(struct acpi_processor *pr); | |
01854e69 | 91 | |
1da177e4 | 92 | |
1ba90e3a | 93 | static const struct acpi_device_id processor_device_ids[] = { |
ad93a765 | 94 | {ACPI_PROCESSOR_OBJECT_HID, 0}, |
9eccbc2f | 95 | {"ACPI0007", 0}, |
1ba90e3a TR |
96 | {"", 0}, |
97 | }; | |
98 | MODULE_DEVICE_TABLE(acpi, processor_device_ids); | |
99 | ||
1da177e4 | 100 | static struct acpi_driver acpi_processor_driver = { |
c2b6705b | 101 | .name = "processor", |
4be44fcd | 102 | .class = ACPI_PROCESSOR_CLASS, |
1ba90e3a | 103 | .ids = processor_device_ids, |
4be44fcd LB |
104 | .ops = { |
105 | .add = acpi_processor_add, | |
106 | .remove = acpi_processor_remove, | |
b04e7bdb TG |
107 | .suspend = acpi_processor_suspend, |
108 | .resume = acpi_processor_resume, | |
7ec0a729 | 109 | .notify = acpi_processor_notify, |
4be44fcd | 110 | }, |
1da177e4 LT |
111 | }; |
112 | ||
113 | #define INSTALL_NOTIFY_HANDLER 1 | |
114 | #define UNINSTALL_NOTIFY_HANDLER 2 | |
74cad4ee | 115 | #ifdef CONFIG_ACPI_PROCFS |
d7508032 | 116 | static const struct file_operations acpi_processor_info_fops = { |
cf7acfab | 117 | .owner = THIS_MODULE, |
4be44fcd LB |
118 | .open = acpi_processor_info_open_fs, |
119 | .read = seq_read, | |
120 | .llseek = seq_lseek, | |
121 | .release = single_release, | |
1da177e4 | 122 | }; |
74cad4ee | 123 | #endif |
1da177e4 | 124 | |
706546d0 | 125 | DEFINE_PER_CPU(struct acpi_processor *, processors); |
0f1d683f NC |
126 | EXPORT_PER_CPU_SYMBOL(processors); |
127 | ||
9f222718 | 128 | struct acpi_processor_errata errata __read_mostly; |
1da177e4 | 129 | |
1da177e4 LT |
130 | /* -------------------------------------------------------------------------- |
131 | Errata Handling | |
132 | -------------------------------------------------------------------------- */ | |
133 | ||
4be44fcd | 134 | static int acpi_processor_errata_piix4(struct pci_dev *dev) |
1da177e4 | 135 | { |
4be44fcd LB |
136 | u8 value1 = 0; |
137 | u8 value2 = 0; | |
1da177e4 | 138 | |
1da177e4 LT |
139 | |
140 | if (!dev) | |
d550d98d | 141 | return -EINVAL; |
1da177e4 LT |
142 | |
143 | /* | |
144 | * Note that 'dev' references the PIIX4 ACPI Controller. | |
145 | */ | |
146 | ||
44c10138 | 147 | switch (dev->revision) { |
1da177e4 LT |
148 | case 0: |
149 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n")); | |
150 | break; | |
151 | case 1: | |
152 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n")); | |
153 | break; | |
154 | case 2: | |
155 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n")); | |
156 | break; | |
157 | case 3: | |
158 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M\n")); | |
159 | break; | |
160 | default: | |
161 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4\n")); | |
162 | break; | |
163 | } | |
164 | ||
44c10138 | 165 | switch (dev->revision) { |
1da177e4 LT |
166 | |
167 | case 0: /* PIIX4 A-step */ | |
168 | case 1: /* PIIX4 B-step */ | |
169 | /* | |
170 | * See specification changes #13 ("Manual Throttle Duty Cycle") | |
171 | * and #14 ("Enabling and Disabling Manual Throttle"), plus | |
172 | * erratum #5 ("STPCLK# Deassertion Time") from the January | |
173 | * 2002 PIIX4 specification update. Applies to only older | |
174 | * PIIX4 models. | |
175 | */ | |
176 | errata.piix4.throttle = 1; | |
177 | ||
178 | case 2: /* PIIX4E */ | |
179 | case 3: /* PIIX4M */ | |
180 | /* | |
181 | * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA | |
182 | * Livelock") from the January 2002 PIIX4 specification update. | |
183 | * Applies to all PIIX4 models. | |
184 | */ | |
185 | ||
186 | /* | |
187 | * BM-IDE | |
188 | * ------ | |
189 | * Find the PIIX4 IDE Controller and get the Bus Master IDE | |
190 | * Status register address. We'll use this later to read | |
191 | * each IDE controller's DMA status to make sure we catch all | |
192 | * DMA activity. | |
193 | */ | |
194 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
195 | PCI_DEVICE_ID_INTEL_82371AB, |
196 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
197 | if (dev) { |
198 | errata.piix4.bmisx = pci_resource_start(dev, 4); | |
199 | pci_dev_put(dev); | |
200 | } | |
201 | ||
202 | /* | |
203 | * Type-F DMA | |
204 | * ---------- | |
205 | * Find the PIIX4 ISA Controller and read the Motherboard | |
206 | * DMA controller's status to see if Type-F (Fast) DMA mode | |
207 | * is enabled (bit 7) on either channel. Note that we'll | |
208 | * disable C3 support if this is enabled, as some legacy | |
209 | * devices won't operate well if fast DMA is disabled. | |
210 | */ | |
211 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
212 | PCI_DEVICE_ID_INTEL_82371AB_0, |
213 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
214 | if (dev) { |
215 | pci_read_config_byte(dev, 0x76, &value1); | |
216 | pci_read_config_byte(dev, 0x77, &value2); | |
217 | if ((value1 & 0x80) || (value2 & 0x80)) | |
218 | errata.piix4.fdma = 1; | |
219 | pci_dev_put(dev); | |
220 | } | |
221 | ||
222 | break; | |
223 | } | |
224 | ||
225 | if (errata.piix4.bmisx) | |
226 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 227 | "Bus master activity detection (BM-IDE) erratum enabled\n")); |
1da177e4 LT |
228 | if (errata.piix4.fdma) |
229 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 230 | "Type-F DMA livelock erratum (C3 disabled)\n")); |
1da177e4 | 231 | |
d550d98d | 232 | return 0; |
1da177e4 LT |
233 | } |
234 | ||
8713cbef | 235 | static int acpi_processor_errata(struct acpi_processor *pr) |
1da177e4 | 236 | { |
4be44fcd LB |
237 | int result = 0; |
238 | struct pci_dev *dev = NULL; | |
1da177e4 | 239 | |
1da177e4 LT |
240 | |
241 | if (!pr) | |
d550d98d | 242 | return -EINVAL; |
1da177e4 LT |
243 | |
244 | /* | |
245 | * PIIX4 | |
246 | */ | |
247 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
248 | PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID, |
249 | PCI_ANY_ID, NULL); | |
1da177e4 LT |
250 | if (dev) { |
251 | result = acpi_processor_errata_piix4(dev); | |
252 | pci_dev_put(dev); | |
253 | } | |
254 | ||
d550d98d | 255 | return result; |
1da177e4 LT |
256 | } |
257 | ||
1da177e4 LT |
258 | /* -------------------------------------------------------------------------- |
259 | FS Interface (/proc) | |
260 | -------------------------------------------------------------------------- */ | |
261 | ||
74cad4ee | 262 | #ifdef CONFIG_ACPI_PROCFS |
4be44fcd | 263 | static struct proc_dir_entry *acpi_processor_dir = NULL; |
1da177e4 LT |
264 | |
265 | static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset) | |
266 | { | |
50dd0969 | 267 | struct acpi_processor *pr = seq->private; |
1da177e4 | 268 | |
1da177e4 LT |
269 | |
270 | if (!pr) | |
271 | goto end; | |
272 | ||
273 | seq_printf(seq, "processor id: %d\n" | |
4be44fcd LB |
274 | "acpi id: %d\n" |
275 | "bus mastering control: %s\n" | |
276 | "power management: %s\n" | |
277 | "throttling control: %s\n" | |
278 | "limit interface: %s\n", | |
279 | pr->id, | |
280 | pr->acpi_id, | |
281 | pr->flags.bm_control ? "yes" : "no", | |
282 | pr->flags.power ? "yes" : "no", | |
283 | pr->flags.throttling ? "yes" : "no", | |
284 | pr->flags.limit ? "yes" : "no"); | |
285 | ||
286 | end: | |
d550d98d | 287 | return 0; |
1da177e4 LT |
288 | } |
289 | ||
290 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file) | |
291 | { | |
292 | return single_open(file, acpi_processor_info_seq_show, | |
4be44fcd | 293 | PDE(inode)->data); |
1da177e4 LT |
294 | } |
295 | ||
bf8b4542 | 296 | static int __cpuinit acpi_processor_add_fs(struct acpi_device *device) |
1da177e4 | 297 | { |
4be44fcd | 298 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 299 | |
1da177e4 LT |
300 | |
301 | if (!acpi_device_dir(device)) { | |
302 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 303 | acpi_processor_dir); |
1da177e4 | 304 | if (!acpi_device_dir(device)) |
d550d98d | 305 | return -ENODEV; |
1da177e4 | 306 | } |
1da177e4 LT |
307 | |
308 | /* 'info' [R] */ | |
cf7acfab DL |
309 | entry = proc_create_data(ACPI_PROCESSOR_FILE_INFO, |
310 | S_IRUGO, acpi_device_dir(device), | |
311 | &acpi_processor_info_fops, | |
312 | acpi_driver_data(device)); | |
1da177e4 | 313 | if (!entry) |
d550d98d | 314 | return -EIO; |
1da177e4 LT |
315 | |
316 | /* 'throttling' [R/W] */ | |
cf7acfab DL |
317 | entry = proc_create_data(ACPI_PROCESSOR_FILE_THROTTLING, |
318 | S_IFREG | S_IRUGO | S_IWUSR, | |
319 | acpi_device_dir(device), | |
320 | &acpi_processor_throttling_fops, | |
321 | acpi_driver_data(device)); | |
1da177e4 | 322 | if (!entry) |
d550d98d | 323 | return -EIO; |
1da177e4 LT |
324 | |
325 | /* 'limit' [R/W] */ | |
cf7acfab DL |
326 | entry = proc_create_data(ACPI_PROCESSOR_FILE_LIMIT, |
327 | S_IFREG | S_IRUGO | S_IWUSR, | |
328 | acpi_device_dir(device), | |
329 | &acpi_processor_limit_fops, | |
330 | acpi_driver_data(device)); | |
1da177e4 | 331 | if (!entry) |
d550d98d | 332 | return -EIO; |
d550d98d | 333 | return 0; |
1da177e4 | 334 | } |
4be44fcd | 335 | static int acpi_processor_remove_fs(struct acpi_device *device) |
1da177e4 | 336 | { |
1da177e4 LT |
337 | |
338 | if (acpi_device_dir(device)) { | |
4be44fcd LB |
339 | remove_proc_entry(ACPI_PROCESSOR_FILE_INFO, |
340 | acpi_device_dir(device)); | |
1da177e4 | 341 | remove_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, |
4be44fcd LB |
342 | acpi_device_dir(device)); |
343 | remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, | |
344 | acpi_device_dir(device)); | |
1da177e4 LT |
345 | remove_proc_entry(acpi_device_bid(device), acpi_processor_dir); |
346 | acpi_device_dir(device) = NULL; | |
347 | } | |
348 | ||
d550d98d | 349 | return 0; |
1da177e4 | 350 | } |
74cad4ee ZY |
351 | #else |
352 | static inline int acpi_processor_add_fs(struct acpi_device *device) | |
353 | { | |
354 | return 0; | |
355 | } | |
356 | static inline int acpi_processor_remove_fs(struct acpi_device *device) | |
357 | { | |
358 | return 0; | |
359 | } | |
360 | #endif | |
1da177e4 | 361 | |
1da177e4 LT |
362 | /* -------------------------------------------------------------------------- |
363 | Driver Interface | |
364 | -------------------------------------------------------------------------- */ | |
365 | ||
b26e9286 | 366 | static int acpi_processor_get_info(struct acpi_device *device) |
1da177e4 | 367 | { |
4be44fcd LB |
368 | acpi_status status = 0; |
369 | union acpi_object object = { 0 }; | |
370 | struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; | |
b26e9286 MS |
371 | struct acpi_processor *pr; |
372 | int cpu_index, device_declaration = 0; | |
4be44fcd | 373 | static int cpu0_initialized; |
1da177e4 | 374 | |
b26e9286 | 375 | pr = acpi_driver_data(device); |
1da177e4 | 376 | if (!pr) |
d550d98d | 377 | return -EINVAL; |
1da177e4 LT |
378 | |
379 | if (num_online_cpus() > 1) | |
380 | errata.smp = TRUE; | |
381 | ||
382 | acpi_processor_errata(pr); | |
383 | ||
384 | /* | |
385 | * Check to see if we have bus mastering arbitration control. This | |
386 | * is required for proper C3 usage (to maintain cache coherency). | |
387 | */ | |
cee324b1 | 388 | if (acpi_gbl_FADT.pm2_control_block && acpi_gbl_FADT.pm2_control_length) { |
1da177e4 LT |
389 | pr->flags.bm_control = 1; |
390 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd LB |
391 | "Bus mastering arbitration control present\n")); |
392 | } else | |
1da177e4 | 393 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
4be44fcd | 394 | "No bus mastering arbitration control\n")); |
1da177e4 | 395 | |
6cc73b48 BH |
396 | if (!strcmp(acpi_device_hid(device), ACPI_PROCESSOR_OBJECT_HID)) { |
397 | /* Declared with "Processor" statement; match ProcessorID */ | |
398 | status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); | |
399 | if (ACPI_FAILURE(status)) { | |
400 | printk(KERN_ERR PREFIX "Evaluating processor object\n"); | |
401 | return -ENODEV; | |
402 | } | |
403 | ||
404 | /* | |
405 | * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. | |
406 | * >>> 'acpi_get_processor_id(acpi_id, &id)' in | |
407 | * arch/xxx/acpi.c | |
408 | */ | |
409 | pr->acpi_id = object.processor.proc_id; | |
410 | } else { | |
b26e9286 MS |
411 | /* |
412 | * Declared with "Device" statement; match _UID. | |
413 | * Note that we don't handle string _UIDs yet. | |
414 | */ | |
27663c58 | 415 | unsigned long long value; |
11bf04c4 AS |
416 | status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID, |
417 | NULL, &value); | |
418 | if (ACPI_FAILURE(status)) { | |
b26e9286 MS |
419 | printk(KERN_ERR PREFIX |
420 | "Evaluating processor _UID [%#x]\n", status); | |
11bf04c4 AS |
421 | return -ENODEV; |
422 | } | |
b26e9286 | 423 | device_declaration = 1; |
11bf04c4 | 424 | pr->acpi_id = value; |
11bf04c4 | 425 | } |
2e9d5e4e | 426 | cpu_index = acpi_get_cpuid(pr->handle, device_declaration, pr->acpi_id); |
1da177e4 | 427 | |
4be44fcd | 428 | /* Handle UP system running SMP kernel, with no LAPIC in MADT */ |
df42baa0 | 429 | if (!cpu0_initialized && (cpu_index == -1) && |
4be44fcd LB |
430 | (num_online_cpus() == 1)) { |
431 | cpu_index = 0; | |
432 | } | |
433 | ||
434 | cpu0_initialized = 1; | |
435 | ||
436 | pr->id = cpu_index; | |
437 | ||
438 | /* | |
439 | * Extra Processor objects may be enumerated on MP systems with | |
440 | * less than the max # of CPUs. They should be ignored _iff | |
441 | * they are physically not present. | |
442 | */ | |
f18c5a08 | 443 | if (pr->id == -1) { |
4be44fcd LB |
444 | if (ACPI_FAILURE |
445 | (acpi_processor_hotadd_init(pr->handle, &pr->id))) { | |
d550d98d | 446 | return -ENODEV; |
4be44fcd LB |
447 | } |
448 | } | |
7a04b849 ZY |
449 | /* |
450 | * On some boxes several processors use the same processor bus id. | |
451 | * But they are located in different scope. For example: | |
452 | * \_SB.SCK0.CPU0 | |
453 | * \_SB.SCK1.CPU0 | |
454 | * Rename the processor device bus id. And the new bus id will be | |
455 | * generated as the following format: | |
456 | * CPU+CPU ID. | |
457 | */ | |
458 | sprintf(acpi_device_bid(device), "CPU%X", pr->id); | |
1da177e4 | 459 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, |
4be44fcd | 460 | pr->acpi_id)); |
1da177e4 LT |
461 | |
462 | if (!object.processor.pblk_address) | |
463 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n")); | |
464 | else if (object.processor.pblk_length != 6) | |
6468463a LB |
465 | printk(KERN_ERR PREFIX "Invalid PBLK length [%d]\n", |
466 | object.processor.pblk_length); | |
1da177e4 LT |
467 | else { |
468 | pr->throttling.address = object.processor.pblk_address; | |
cee324b1 AS |
469 | pr->throttling.duty_offset = acpi_gbl_FADT.duty_offset; |
470 | pr->throttling.duty_width = acpi_gbl_FADT.duty_width; | |
1da177e4 LT |
471 | |
472 | pr->pblk = object.processor.pblk_address; | |
473 | ||
474 | /* | |
475 | * We don't care about error returns - we just try to mark | |
476 | * these reserved so that nobody else is confused into thinking | |
477 | * that this region might be unused.. | |
478 | * | |
479 | * (In particular, allocating the IO range for Cardbus) | |
480 | */ | |
481 | request_region(pr->throttling.address, 6, "ACPI CPU throttle"); | |
482 | } | |
483 | ||
fe086a7b AC |
484 | /* |
485 | * If ACPI describes a slot number for this CPU, we can use it | |
486 | * ensure we get the right value in the "physical id" field | |
487 | * of /proc/cpuinfo | |
488 | */ | |
489 | status = acpi_evaluate_object(pr->handle, "_SUN", NULL, &buffer); | |
490 | if (ACPI_SUCCESS(status)) | |
491 | arch_fix_phys_package_id(pr->id, object.integer.value); | |
492 | ||
d550d98d | 493 | return 0; |
1da177e4 LT |
494 | } |
495 | ||
706546d0 | 496 | static DEFINE_PER_CPU(void *, processor_device_array); |
cd8e2b48 | 497 | |
7ec0a729 | 498 | static void acpi_processor_notify(struct acpi_device *device, u32 event) |
1da177e4 | 499 | { |
7ec0a729 | 500 | struct acpi_processor *pr = acpi_driver_data(device); |
e790cc8b | 501 | int saved; |
1da177e4 LT |
502 | |
503 | if (!pr) | |
d550d98d | 504 | return; |
1da177e4 | 505 | |
1da177e4 LT |
506 | switch (event) { |
507 | case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: | |
e790cc8b | 508 | saved = pr->performance_platform_limit; |
d81c45e1 | 509 | acpi_processor_ppc_has_changed(pr, 1); |
e790cc8b AS |
510 | if (saved == pr->performance_platform_limit) |
511 | break; | |
14e04fb3 | 512 | acpi_bus_generate_proc_event(device, event, |
4be44fcd | 513 | pr->performance_platform_limit); |
962ce8ca | 514 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 515 | dev_name(&device->dev), event, |
962ce8ca | 516 | pr->performance_platform_limit); |
1da177e4 LT |
517 | break; |
518 | case ACPI_PROCESSOR_NOTIFY_POWER: | |
519 | acpi_processor_cst_has_changed(pr); | |
14e04fb3 | 520 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca | 521 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 522 | dev_name(&device->dev), event, 0); |
1da177e4 | 523 | break; |
01854e69 LY |
524 | case ACPI_PROCESSOR_NOTIFY_THROTTLING: |
525 | acpi_processor_tstate_has_changed(pr); | |
14e04fb3 | 526 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca | 527 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 528 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
529 | default: |
530 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 531 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
532 | break; |
533 | } | |
534 | ||
d550d98d | 535 | return; |
1da177e4 LT |
536 | } |
537 | ||
729c6ba3 VP |
538 | static int acpi_cpu_soft_notify(struct notifier_block *nfb, |
539 | unsigned long action, void *hcpu) | |
540 | { | |
541 | unsigned int cpu = (unsigned long)hcpu; | |
706546d0 | 542 | struct acpi_processor *pr = per_cpu(processors, cpu); |
729c6ba3 VP |
543 | |
544 | if (action == CPU_ONLINE && pr) { | |
d81c45e1 | 545 | acpi_processor_ppc_has_changed(pr, 0); |
729c6ba3 VP |
546 | acpi_processor_cst_has_changed(pr); |
547 | acpi_processor_tstate_has_changed(pr); | |
548 | } | |
549 | return NOTIFY_OK; | |
550 | } | |
551 | ||
552 | static struct notifier_block acpi_cpu_notifier = | |
553 | { | |
554 | .notifier_call = acpi_cpu_soft_notify, | |
555 | }; | |
556 | ||
941b10fa | 557 | static int __cpuinit acpi_processor_add(struct acpi_device *device) |
1da177e4 | 558 | { |
4be44fcd | 559 | struct acpi_processor *pr = NULL; |
970b0492 BH |
560 | int result = 0; |
561 | struct sys_device *sysdev; | |
1da177e4 | 562 | |
36bcbec7 | 563 | pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL); |
1da177e4 | 564 | if (!pr) |
d550d98d | 565 | return -ENOMEM; |
1da177e4 | 566 | |
eaa95840 | 567 | if (!zalloc_cpumask_var(&pr->throttling.shared_cpu_map, GFP_KERNEL)) { |
2fdf66b4 RR |
568 | kfree(pr); |
569 | return -ENOMEM; | |
570 | } | |
571 | ||
1da177e4 LT |
572 | pr->handle = device->handle; |
573 | strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); | |
574 | strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); | |
db89b4f0 | 575 | device->driver_data = pr; |
1da177e4 | 576 | |
b26e9286 | 577 | result = acpi_processor_get_info(device); |
1da177e4 LT |
578 | if (result) { |
579 | /* Processor is physically not present */ | |
d550d98d | 580 | return 0; |
1da177e4 LT |
581 | } |
582 | ||
fbb43ab0 | 583 | BUG_ON((pr->id >= nr_cpu_ids) || (pr->id < 0)); |
1da177e4 | 584 | |
cd8e2b48 VP |
585 | /* |
586 | * Buggy BIOS check | |
587 | * ACPI id of processors can be reported wrongly by the BIOS. | |
588 | * Don't trust it blindly | |
589 | */ | |
706546d0 MT |
590 | if (per_cpu(processor_device_array, pr->id) != NULL && |
591 | per_cpu(processor_device_array, pr->id) != device) { | |
4fdb2a05 | 592 | printk(KERN_WARNING "BIOS reported wrong ACPI id " |
0eacee58 | 593 | "for the processor\n"); |
970b0492 BH |
594 | result = -ENODEV; |
595 | goto err_free_cpumask; | |
cd8e2b48 | 596 | } |
706546d0 | 597 | per_cpu(processor_device_array, pr->id) = device; |
cd8e2b48 | 598 | |
706546d0 | 599 | per_cpu(processors, pr->id) = pr; |
1da177e4 LT |
600 | |
601 | result = acpi_processor_add_fs(device); | |
602 | if (result) | |
970b0492 | 603 | goto err_free_cpumask; |
1da177e4 | 604 | |
9f1eb99c | 605 | sysdev = get_cpu_sysdev(pr->id); |
d4e05261 BH |
606 | if (sysfs_create_link(&device->dev.kobj, &sysdev->kobj, "sysdev")) { |
607 | result = -EFAULT; | |
608 | goto err_remove_fs; | |
609 | } | |
9f1eb99c | 610 | |
0ac3c571 | 611 | #ifdef CONFIG_CPU_FREQ |
d81c45e1 | 612 | acpi_processor_ppc_has_changed(pr, 0); |
0ac3c571 ZY |
613 | #endif |
614 | acpi_processor_get_throttling_info(pr); | |
615 | acpi_processor_get_limit_info(pr); | |
616 | ||
05131ecc | 617 | |
1da177e4 LT |
618 | acpi_processor_power_init(pr, device); |
619 | ||
d9460fd2 ZR |
620 | pr->cdev = thermal_cooling_device_register("Processor", device, |
621 | &processor_cooling_ops); | |
d76628c6 TS |
622 | if (IS_ERR(pr->cdev)) { |
623 | result = PTR_ERR(pr->cdev); | |
d4e05261 | 624 | goto err_power_exit; |
d76628c6 | 625 | } |
9030062f | 626 | |
13c41157 | 627 | dev_dbg(&device->dev, "registered as cooling_device%d\n", |
fc3a8828 | 628 | pr->cdev->id); |
9030062f JL |
629 | |
630 | result = sysfs_create_link(&device->dev.kobj, | |
631 | &pr->cdev->device.kobj, | |
632 | "thermal_cooling"); | |
d4e05261 | 633 | if (result) { |
9030062f | 634 | printk(KERN_ERR PREFIX "Create sysfs link\n"); |
d4e05261 BH |
635 | goto err_thermal_unregister; |
636 | } | |
9030062f JL |
637 | result = sysfs_create_link(&pr->cdev->device.kobj, |
638 | &device->dev.kobj, | |
639 | "device"); | |
d4e05261 | 640 | if (result) { |
9030062f | 641 | printk(KERN_ERR PREFIX "Create sysfs link\n"); |
d4e05261 BH |
642 | goto err_remove_sysfs; |
643 | } | |
d9460fd2 | 644 | |
d550d98d | 645 | return 0; |
d4e05261 BH |
646 | |
647 | err_remove_sysfs: | |
648 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); | |
649 | err_thermal_unregister: | |
650 | thermal_cooling_device_unregister(pr->cdev); | |
651 | err_power_exit: | |
652 | acpi_processor_power_exit(pr, device); | |
653 | err_remove_fs: | |
654 | acpi_processor_remove_fs(device); | |
970b0492 BH |
655 | err_free_cpumask: |
656 | free_cpumask_var(pr->throttling.shared_cpu_map); | |
1da177e4 | 657 | |
d550d98d | 658 | return result; |
1da177e4 LT |
659 | } |
660 | ||
4be44fcd | 661 | static int acpi_processor_remove(struct acpi_device *device, int type) |
1da177e4 | 662 | { |
4be44fcd | 663 | struct acpi_processor *pr = NULL; |
1da177e4 | 664 | |
1da177e4 LT |
665 | |
666 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 667 | return -EINVAL; |
1da177e4 | 668 | |
50dd0969 | 669 | pr = acpi_driver_data(device); |
1da177e4 | 670 | |
2fdf66b4 RR |
671 | if (pr->id >= nr_cpu_ids) |
672 | goto free; | |
1da177e4 LT |
673 | |
674 | if (type == ACPI_BUS_REMOVAL_EJECT) { | |
675 | if (acpi_processor_handle_eject(pr)) | |
d550d98d | 676 | return -EINVAL; |
1da177e4 LT |
677 | } |
678 | ||
679 | acpi_processor_power_exit(pr, device); | |
680 | ||
9f1eb99c ZR |
681 | sysfs_remove_link(&device->dev.kobj, "sysdev"); |
682 | ||
1da177e4 LT |
683 | acpi_processor_remove_fs(device); |
684 | ||
f28bb45e ZY |
685 | if (pr->cdev) { |
686 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); | |
687 | sysfs_remove_link(&pr->cdev->device.kobj, "device"); | |
688 | thermal_cooling_device_unregister(pr->cdev); | |
689 | pr->cdev = NULL; | |
690 | } | |
d9460fd2 | 691 | |
706546d0 MT |
692 | per_cpu(processors, pr->id) = NULL; |
693 | per_cpu(processor_device_array, pr->id) = NULL; | |
2fdf66b4 RR |
694 | |
695 | free: | |
696 | free_cpumask_var(pr->throttling.shared_cpu_map); | |
1da177e4 LT |
697 | kfree(pr); |
698 | ||
d550d98d | 699 | return 0; |
1da177e4 LT |
700 | } |
701 | ||
702 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
703 | /**************************************************************************** | |
704 | * Acpi processor hotplug support * | |
705 | ****************************************************************************/ | |
706 | ||
4be44fcd | 707 | static int is_processor_present(acpi_handle handle) |
1da177e4 | 708 | { |
4be44fcd | 709 | acpi_status status; |
27663c58 | 710 | unsigned long long sta = 0; |
1da177e4 | 711 | |
1da177e4 LT |
712 | |
713 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
cfaf3747 ZR |
714 | |
715 | if (ACPI_SUCCESS(status) && (sta & ACPI_STA_DEVICE_PRESENT)) | |
716 | return 1; | |
717 | ||
d0ce46f5 ZR |
718 | /* |
719 | * _STA is mandatory for a processor that supports hot plug | |
720 | */ | |
721 | if (status == AE_NOT_FOUND) | |
722 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
723 | "Processor does not support hot plug\n")); | |
724 | else | |
725 | ACPI_EXCEPTION((AE_INFO, status, | |
726 | "Processor Device is not present")); | |
cfaf3747 | 727 | return 0; |
1da177e4 LT |
728 | } |
729 | ||
1da177e4 | 730 | static |
4be44fcd | 731 | int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 732 | { |
4be44fcd LB |
733 | acpi_handle phandle; |
734 | struct acpi_device *pdev; | |
1da177e4 | 735 | |
1da177e4 LT |
736 | |
737 | if (acpi_get_parent(handle, &phandle)) { | |
d550d98d | 738 | return -ENODEV; |
1da177e4 LT |
739 | } |
740 | ||
741 | if (acpi_bus_get_device(phandle, &pdev)) { | |
d550d98d | 742 | return -ENODEV; |
1da177e4 LT |
743 | } |
744 | ||
745 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { | |
d550d98d | 746 | return -ENODEV; |
1da177e4 LT |
747 | } |
748 | ||
d550d98d | 749 | return 0; |
1da177e4 LT |
750 | } |
751 | ||
b95e9e8d SR |
752 | static void __ref acpi_processor_hotplug_notify(acpi_handle handle, |
753 | u32 event, void *data) | |
1da177e4 | 754 | { |
4be44fcd LB |
755 | struct acpi_processor *pr; |
756 | struct acpi_device *device = NULL; | |
1da177e4 LT |
757 | int result; |
758 | ||
1da177e4 LT |
759 | |
760 | switch (event) { | |
761 | case ACPI_NOTIFY_BUS_CHECK: | |
762 | case ACPI_NOTIFY_DEVICE_CHECK: | |
d6f882e1 GC |
763 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
764 | "Processor driver received %s event\n", | |
4be44fcd | 765 | (event == ACPI_NOTIFY_BUS_CHECK) ? |
d6f882e1 | 766 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK")); |
1da177e4 LT |
767 | |
768 | if (!is_processor_present(handle)) | |
769 | break; | |
770 | ||
771 | if (acpi_bus_get_device(handle, &device)) { | |
772 | result = acpi_processor_device_add(handle, &device); | |
773 | if (result) | |
6468463a LB |
774 | printk(KERN_ERR PREFIX |
775 | "Unable to add the device\n"); | |
1da177e4 LT |
776 | break; |
777 | } | |
4be44fcd | 778 | break; |
1da177e4 | 779 | case ACPI_NOTIFY_EJECT_REQUEST: |
4be44fcd LB |
780 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
781 | "received ACPI_NOTIFY_EJECT_REQUEST\n")); | |
1da177e4 LT |
782 | |
783 | if (acpi_bus_get_device(handle, &device)) { | |
6468463a LB |
784 | printk(KERN_ERR PREFIX |
785 | "Device don't exist, dropping EJECT\n"); | |
1da177e4 LT |
786 | break; |
787 | } | |
788 | pr = acpi_driver_data(device); | |
789 | if (!pr) { | |
6468463a LB |
790 | printk(KERN_ERR PREFIX |
791 | "Driver data is NULL, dropping EJECT\n"); | |
d550d98d | 792 | return; |
1da177e4 | 793 | } |
1da177e4 LT |
794 | break; |
795 | default: | |
796 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 797 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
798 | break; |
799 | } | |
800 | ||
d550d98d | 801 | return; |
1da177e4 LT |
802 | } |
803 | ||
804 | static acpi_status | |
805 | processor_walk_namespace_cb(acpi_handle handle, | |
4be44fcd | 806 | u32 lvl, void *context, void **rv) |
1da177e4 | 807 | { |
4be44fcd | 808 | acpi_status status; |
1da177e4 | 809 | int *action = context; |
4be44fcd | 810 | acpi_object_type type = 0; |
1da177e4 LT |
811 | |
812 | status = acpi_get_type(handle, &type); | |
813 | if (ACPI_FAILURE(status)) | |
4be44fcd | 814 | return (AE_OK); |
1da177e4 LT |
815 | |
816 | if (type != ACPI_TYPE_PROCESSOR) | |
4be44fcd | 817 | return (AE_OK); |
1da177e4 | 818 | |
4be44fcd | 819 | switch (*action) { |
1da177e4 LT |
820 | case INSTALL_NOTIFY_HANDLER: |
821 | acpi_install_notify_handler(handle, | |
4be44fcd LB |
822 | ACPI_SYSTEM_NOTIFY, |
823 | acpi_processor_hotplug_notify, | |
824 | NULL); | |
1da177e4 LT |
825 | break; |
826 | case UNINSTALL_NOTIFY_HANDLER: | |
827 | acpi_remove_notify_handler(handle, | |
4be44fcd LB |
828 | ACPI_SYSTEM_NOTIFY, |
829 | acpi_processor_hotplug_notify); | |
1da177e4 LT |
830 | break; |
831 | default: | |
832 | break; | |
833 | } | |
834 | ||
4be44fcd | 835 | return (AE_OK); |
1da177e4 LT |
836 | } |
837 | ||
4be44fcd | 838 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 | 839 | { |
1da177e4 LT |
840 | |
841 | if (!is_processor_present(handle)) { | |
d550d98d | 842 | return AE_ERROR; |
1da177e4 LT |
843 | } |
844 | ||
845 | if (acpi_map_lsapic(handle, p_cpu)) | |
d550d98d | 846 | return AE_ERROR; |
1da177e4 LT |
847 | |
848 | if (arch_register_cpu(*p_cpu)) { | |
849 | acpi_unmap_lsapic(*p_cpu); | |
d550d98d | 850 | return AE_ERROR; |
1da177e4 LT |
851 | } |
852 | ||
d550d98d | 853 | return AE_OK; |
1da177e4 LT |
854 | } |
855 | ||
4be44fcd | 856 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 | 857 | { |
b62b8ef9 ZR |
858 | if (cpu_online(pr->id)) |
859 | cpu_down(pr->id); | |
860 | ||
1da177e4 LT |
861 | arch_unregister_cpu(pr->id); |
862 | acpi_unmap_lsapic(pr->id); | |
4be44fcd | 863 | return (0); |
1da177e4 LT |
864 | } |
865 | #else | |
4be44fcd | 866 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 LT |
867 | { |
868 | return AE_ERROR; | |
869 | } | |
4be44fcd | 870 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 | 871 | { |
4be44fcd | 872 | return (-EINVAL); |
1da177e4 LT |
873 | } |
874 | #endif | |
875 | ||
1da177e4 LT |
876 | static |
877 | void acpi_processor_install_hotplug_notify(void) | |
878 | { | |
879 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
880 | int action = INSTALL_NOTIFY_HANDLER; | |
881 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
882 | ACPI_ROOT_OBJECT, |
883 | ACPI_UINT32_MAX, | |
2263576c | 884 | processor_walk_namespace_cb, NULL, &action, NULL); |
1da177e4 | 885 | #endif |
729c6ba3 | 886 | register_hotcpu_notifier(&acpi_cpu_notifier); |
1da177e4 LT |
887 | } |
888 | ||
1da177e4 LT |
889 | static |
890 | void acpi_processor_uninstall_hotplug_notify(void) | |
891 | { | |
892 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
893 | int action = UNINSTALL_NOTIFY_HANDLER; | |
894 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
895 | ACPI_ROOT_OBJECT, |
896 | ACPI_UINT32_MAX, | |
2263576c | 897 | processor_walk_namespace_cb, NULL, &action, NULL); |
1da177e4 | 898 | #endif |
729c6ba3 | 899 | unregister_hotcpu_notifier(&acpi_cpu_notifier); |
1da177e4 LT |
900 | } |
901 | ||
902 | /* | |
903 | * We keep the driver loaded even when ACPI is not running. | |
904 | * This is needed for the powernow-k8 driver, that works even without | |
905 | * ACPI, but needs symbols from this driver | |
906 | */ | |
907 | ||
4be44fcd | 908 | static int __init acpi_processor_init(void) |
1da177e4 | 909 | { |
4be44fcd | 910 | int result = 0; |
1da177e4 | 911 | |
ce8442b5 YL |
912 | if (acpi_disabled) |
913 | return 0; | |
914 | ||
1da177e4 LT |
915 | memset(&errata, 0, sizeof(errata)); |
916 | ||
74cad4ee | 917 | #ifdef CONFIG_ACPI_PROCFS |
1da177e4 LT |
918 | acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
919 | if (!acpi_processor_dir) | |
83822fc9 | 920 | return -ENOMEM; |
74cad4ee | 921 | #endif |
4f86d3a8 LB |
922 | result = cpuidle_register_driver(&acpi_idle_driver); |
923 | if (result < 0) | |
924 | goto out_proc; | |
925 | ||
1da177e4 | 926 | result = acpi_bus_register_driver(&acpi_processor_driver); |
4f86d3a8 LB |
927 | if (result < 0) |
928 | goto out_cpuidle; | |
1da177e4 LT |
929 | |
930 | acpi_processor_install_hotplug_notify(); | |
931 | ||
932 | acpi_thermal_cpufreq_init(); | |
933 | ||
934 | acpi_processor_ppc_init(); | |
935 | ||
1180509f ZY |
936 | acpi_processor_throttling_init(); |
937 | ||
d550d98d | 938 | return 0; |
4f86d3a8 LB |
939 | |
940 | out_cpuidle: | |
941 | cpuidle_unregister_driver(&acpi_idle_driver); | |
942 | ||
943 | out_proc: | |
74cad4ee | 944 | #ifdef CONFIG_ACPI_PROCFS |
4f86d3a8 | 945 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
74cad4ee | 946 | #endif |
4f86d3a8 LB |
947 | |
948 | return result; | |
1da177e4 LT |
949 | } |
950 | ||
4be44fcd | 951 | static void __exit acpi_processor_exit(void) |
1da177e4 | 952 | { |
ce8442b5 YL |
953 | if (acpi_disabled) |
954 | return; | |
955 | ||
1da177e4 LT |
956 | acpi_processor_ppc_exit(); |
957 | ||
958 | acpi_thermal_cpufreq_exit(); | |
959 | ||
960 | acpi_processor_uninstall_hotplug_notify(); | |
961 | ||
962 | acpi_bus_unregister_driver(&acpi_processor_driver); | |
963 | ||
4f86d3a8 LB |
964 | cpuidle_unregister_driver(&acpi_idle_driver); |
965 | ||
74cad4ee | 966 | #ifdef CONFIG_ACPI_PROCFS |
1da177e4 | 967 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
74cad4ee | 968 | #endif |
1da177e4 | 969 | |
d550d98d | 970 | return; |
1da177e4 LT |
971 | } |
972 | ||
1da177e4 LT |
973 | module_init(acpi_processor_init); |
974 | module_exit(acpi_processor_exit); | |
975 | ||
976 | EXPORT_SYMBOL(acpi_processor_set_thermal_limit); | |
977 | ||
978 | MODULE_ALIAS("processor"); |