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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> | |
1da177e4 LT |
43 | #include <linux/dmi.h> |
44 | #include <linux/moduleparam.h> | |
4f86d3a8 | 45 | #include <linux/cpuidle.h> |
5a0e3ad6 | 46 | #include <linux/slab.h> |
1da177e4 LT |
47 | |
48 | #include <asm/io.h> | |
1da177e4 LT |
49 | #include <asm/cpu.h> |
50 | #include <asm/delay.h> | |
51 | #include <asm/uaccess.h> | |
52 | #include <asm/processor.h> | |
53 | #include <asm/smp.h> | |
54 | #include <asm/acpi.h> | |
55 | ||
56 | #include <acpi/acpi_bus.h> | |
57 | #include <acpi/acpi_drivers.h> | |
58 | #include <acpi/processor.h> | |
59 | ||
a192a958 LB |
60 | #define PREFIX "ACPI: " |
61 | ||
1da177e4 | 62 | #define ACPI_PROCESSOR_CLASS "processor" |
1da177e4 LT |
63 | #define ACPI_PROCESSOR_DEVICE_NAME "Processor" |
64 | #define ACPI_PROCESSOR_FILE_INFO "info" | |
65 | #define ACPI_PROCESSOR_FILE_THROTTLING "throttling" | |
66 | #define ACPI_PROCESSOR_FILE_LIMIT "limit" | |
67 | #define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80 | |
68 | #define ACPI_PROCESSOR_NOTIFY_POWER 0x81 | |
01854e69 | 69 | #define ACPI_PROCESSOR_NOTIFY_THROTTLING 0x82 |
9f324bda | 70 | #define ACPI_PROCESSOR_DEVICE_HID "ACPI0007" |
1da177e4 LT |
71 | |
72 | #define ACPI_PROCESSOR_LIMIT_USER 0 | |
73 | #define ACPI_PROCESSOR_LIMIT_THERMAL 1 | |
74 | ||
1da177e4 | 75 | #define _COMPONENT ACPI_PROCESSOR_COMPONENT |
0131aa3d | 76 | ACPI_MODULE_NAME("processor_driver"); |
1da177e4 | 77 | |
f52fd66d | 78 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 79 | MODULE_DESCRIPTION("ACPI Processor Driver"); |
1da177e4 LT |
80 | MODULE_LICENSE("GPL"); |
81 | ||
4be44fcd | 82 | static int acpi_processor_add(struct acpi_device *device); |
4be44fcd | 83 | static int acpi_processor_remove(struct acpi_device *device, int type); |
7ec0a729 | 84 | static void acpi_processor_notify(struct acpi_device *device, u32 event); |
3bd81a87 | 85 | static acpi_status acpi_processor_hotadd_init(struct acpi_processor *pr); |
1da177e4 | 86 | static int acpi_processor_handle_eject(struct acpi_processor *pr); |
99b72508 | 87 | static int acpi_processor_start(struct acpi_processor *pr); |
1da177e4 | 88 | |
1ba90e3a | 89 | static const struct acpi_device_id processor_device_ids[] = { |
ad93a765 | 90 | {ACPI_PROCESSOR_OBJECT_HID, 0}, |
9f324bda | 91 | {ACPI_PROCESSOR_DEVICE_HID, 0}, |
1ba90e3a TR |
92 | {"", 0}, |
93 | }; | |
94 | MODULE_DEVICE_TABLE(acpi, processor_device_ids); | |
95 | ||
e8110b64 RW |
96 | static SIMPLE_DEV_PM_OPS(acpi_processor_pm, |
97 | acpi_processor_suspend, acpi_processor_resume); | |
98 | ||
1da177e4 | 99 | static struct acpi_driver acpi_processor_driver = { |
c2b6705b | 100 | .name = "processor", |
4be44fcd | 101 | .class = ACPI_PROCESSOR_CLASS, |
1ba90e3a | 102 | .ids = processor_device_ids, |
4be44fcd LB |
103 | .ops = { |
104 | .add = acpi_processor_add, | |
105 | .remove = acpi_processor_remove, | |
7ec0a729 | 106 | .notify = acpi_processor_notify, |
4be44fcd | 107 | }, |
e8110b64 | 108 | .drv.pm = &acpi_processor_pm, |
1da177e4 LT |
109 | }; |
110 | ||
111 | #define INSTALL_NOTIFY_HANDLER 1 | |
112 | #define UNINSTALL_NOTIFY_HANDLER 2 | |
1da177e4 | 113 | |
706546d0 | 114 | DEFINE_PER_CPU(struct acpi_processor *, processors); |
0f1d683f NC |
115 | EXPORT_PER_CPU_SYMBOL(processors); |
116 | ||
9f222718 | 117 | struct acpi_processor_errata errata __read_mostly; |
1da177e4 | 118 | |
1da177e4 LT |
119 | /* -------------------------------------------------------------------------- |
120 | Errata Handling | |
121 | -------------------------------------------------------------------------- */ | |
122 | ||
4be44fcd | 123 | static int acpi_processor_errata_piix4(struct pci_dev *dev) |
1da177e4 | 124 | { |
4be44fcd LB |
125 | u8 value1 = 0; |
126 | u8 value2 = 0; | |
1da177e4 | 127 | |
1da177e4 LT |
128 | |
129 | if (!dev) | |
d550d98d | 130 | return -EINVAL; |
1da177e4 LT |
131 | |
132 | /* | |
133 | * Note that 'dev' references the PIIX4 ACPI Controller. | |
134 | */ | |
135 | ||
44c10138 | 136 | switch (dev->revision) { |
1da177e4 LT |
137 | case 0: |
138 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n")); | |
139 | break; | |
140 | case 1: | |
141 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n")); | |
142 | break; | |
143 | case 2: | |
144 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n")); | |
145 | break; | |
146 | case 3: | |
147 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M\n")); | |
148 | break; | |
149 | default: | |
150 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4\n")); | |
151 | break; | |
152 | } | |
153 | ||
44c10138 | 154 | switch (dev->revision) { |
1da177e4 LT |
155 | |
156 | case 0: /* PIIX4 A-step */ | |
157 | case 1: /* PIIX4 B-step */ | |
158 | /* | |
159 | * See specification changes #13 ("Manual Throttle Duty Cycle") | |
160 | * and #14 ("Enabling and Disabling Manual Throttle"), plus | |
161 | * erratum #5 ("STPCLK# Deassertion Time") from the January | |
162 | * 2002 PIIX4 specification update. Applies to only older | |
163 | * PIIX4 models. | |
164 | */ | |
165 | errata.piix4.throttle = 1; | |
166 | ||
167 | case 2: /* PIIX4E */ | |
168 | case 3: /* PIIX4M */ | |
169 | /* | |
170 | * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA | |
171 | * Livelock") from the January 2002 PIIX4 specification update. | |
172 | * Applies to all PIIX4 models. | |
173 | */ | |
174 | ||
175 | /* | |
176 | * BM-IDE | |
177 | * ------ | |
178 | * Find the PIIX4 IDE Controller and get the Bus Master IDE | |
179 | * Status register address. We'll use this later to read | |
180 | * each IDE controller's DMA status to make sure we catch all | |
181 | * DMA activity. | |
182 | */ | |
183 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
184 | PCI_DEVICE_ID_INTEL_82371AB, |
185 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
186 | if (dev) { |
187 | errata.piix4.bmisx = pci_resource_start(dev, 4); | |
188 | pci_dev_put(dev); | |
189 | } | |
190 | ||
191 | /* | |
192 | * Type-F DMA | |
193 | * ---------- | |
194 | * Find the PIIX4 ISA Controller and read the Motherboard | |
195 | * DMA controller's status to see if Type-F (Fast) DMA mode | |
196 | * is enabled (bit 7) on either channel. Note that we'll | |
197 | * disable C3 support if this is enabled, as some legacy | |
198 | * devices won't operate well if fast DMA is disabled. | |
199 | */ | |
200 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
201 | PCI_DEVICE_ID_INTEL_82371AB_0, |
202 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
203 | if (dev) { |
204 | pci_read_config_byte(dev, 0x76, &value1); | |
205 | pci_read_config_byte(dev, 0x77, &value2); | |
206 | if ((value1 & 0x80) || (value2 & 0x80)) | |
207 | errata.piix4.fdma = 1; | |
208 | pci_dev_put(dev); | |
209 | } | |
210 | ||
211 | break; | |
212 | } | |
213 | ||
214 | if (errata.piix4.bmisx) | |
215 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 216 | "Bus master activity detection (BM-IDE) erratum enabled\n")); |
1da177e4 LT |
217 | if (errata.piix4.fdma) |
218 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 219 | "Type-F DMA livelock erratum (C3 disabled)\n")); |
1da177e4 | 220 | |
d550d98d | 221 | return 0; |
1da177e4 LT |
222 | } |
223 | ||
8713cbef | 224 | static int acpi_processor_errata(struct acpi_processor *pr) |
1da177e4 | 225 | { |
4be44fcd LB |
226 | int result = 0; |
227 | struct pci_dev *dev = NULL; | |
1da177e4 | 228 | |
1da177e4 LT |
229 | |
230 | if (!pr) | |
d550d98d | 231 | return -EINVAL; |
1da177e4 LT |
232 | |
233 | /* | |
234 | * PIIX4 | |
235 | */ | |
236 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
237 | PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID, |
238 | PCI_ANY_ID, NULL); | |
1da177e4 LT |
239 | if (dev) { |
240 | result = acpi_processor_errata_piix4(dev); | |
241 | pci_dev_put(dev); | |
242 | } | |
243 | ||
d550d98d | 244 | return result; |
1da177e4 LT |
245 | } |
246 | ||
1da177e4 LT |
247 | /* -------------------------------------------------------------------------- |
248 | Driver Interface | |
249 | -------------------------------------------------------------------------- */ | |
250 | ||
b26e9286 | 251 | static int acpi_processor_get_info(struct acpi_device *device) |
1da177e4 | 252 | { |
4be44fcd LB |
253 | acpi_status status = 0; |
254 | union acpi_object object = { 0 }; | |
255 | struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; | |
b26e9286 MS |
256 | struct acpi_processor *pr; |
257 | int cpu_index, device_declaration = 0; | |
4be44fcd | 258 | static int cpu0_initialized; |
1da177e4 | 259 | |
b26e9286 | 260 | pr = acpi_driver_data(device); |
1da177e4 | 261 | if (!pr) |
d550d98d | 262 | return -EINVAL; |
1da177e4 LT |
263 | |
264 | if (num_online_cpus() > 1) | |
265 | errata.smp = TRUE; | |
266 | ||
267 | acpi_processor_errata(pr); | |
268 | ||
269 | /* | |
270 | * Check to see if we have bus mastering arbitration control. This | |
271 | * is required for proper C3 usage (to maintain cache coherency). | |
272 | */ | |
cee324b1 | 273 | if (acpi_gbl_FADT.pm2_control_block && acpi_gbl_FADT.pm2_control_length) { |
1da177e4 LT |
274 | pr->flags.bm_control = 1; |
275 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd LB |
276 | "Bus mastering arbitration control present\n")); |
277 | } else | |
1da177e4 | 278 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
4be44fcd | 279 | "No bus mastering arbitration control\n")); |
1da177e4 | 280 | |
6cc73b48 BH |
281 | if (!strcmp(acpi_device_hid(device), ACPI_PROCESSOR_OBJECT_HID)) { |
282 | /* Declared with "Processor" statement; match ProcessorID */ | |
283 | status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); | |
284 | if (ACPI_FAILURE(status)) { | |
285 | printk(KERN_ERR PREFIX "Evaluating processor object\n"); | |
286 | return -ENODEV; | |
287 | } | |
288 | ||
289 | /* | |
290 | * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. | |
291 | * >>> 'acpi_get_processor_id(acpi_id, &id)' in | |
292 | * arch/xxx/acpi.c | |
293 | */ | |
294 | pr->acpi_id = object.processor.proc_id; | |
295 | } else { | |
b26e9286 MS |
296 | /* |
297 | * Declared with "Device" statement; match _UID. | |
298 | * Note that we don't handle string _UIDs yet. | |
299 | */ | |
27663c58 | 300 | unsigned long long value; |
11bf04c4 AS |
301 | status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID, |
302 | NULL, &value); | |
303 | if (ACPI_FAILURE(status)) { | |
b26e9286 MS |
304 | printk(KERN_ERR PREFIX |
305 | "Evaluating processor _UID [%#x]\n", status); | |
11bf04c4 AS |
306 | return -ENODEV; |
307 | } | |
b26e9286 | 308 | device_declaration = 1; |
11bf04c4 | 309 | pr->acpi_id = value; |
11bf04c4 | 310 | } |
2e9d5e4e | 311 | cpu_index = acpi_get_cpuid(pr->handle, device_declaration, pr->acpi_id); |
1da177e4 | 312 | |
4be44fcd | 313 | /* Handle UP system running SMP kernel, with no LAPIC in MADT */ |
df42baa0 | 314 | if (!cpu0_initialized && (cpu_index == -1) && |
4be44fcd LB |
315 | (num_online_cpus() == 1)) { |
316 | cpu_index = 0; | |
317 | } | |
318 | ||
319 | cpu0_initialized = 1; | |
320 | ||
321 | pr->id = cpu_index; | |
322 | ||
323 | /* | |
324 | * Extra Processor objects may be enumerated on MP systems with | |
325 | * less than the max # of CPUs. They should be ignored _iff | |
326 | * they are physically not present. | |
327 | */ | |
f18c5a08 | 328 | if (pr->id == -1) { |
3bd81a87 | 329 | if (ACPI_FAILURE(acpi_processor_hotadd_init(pr))) |
d550d98d | 330 | return -ENODEV; |
4be44fcd | 331 | } |
7a04b849 ZY |
332 | /* |
333 | * On some boxes several processors use the same processor bus id. | |
334 | * But they are located in different scope. For example: | |
335 | * \_SB.SCK0.CPU0 | |
336 | * \_SB.SCK1.CPU0 | |
337 | * Rename the processor device bus id. And the new bus id will be | |
338 | * generated as the following format: | |
339 | * CPU+CPU ID. | |
340 | */ | |
341 | sprintf(acpi_device_bid(device), "CPU%X", pr->id); | |
1da177e4 | 342 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, |
4be44fcd | 343 | pr->acpi_id)); |
1da177e4 LT |
344 | |
345 | if (!object.processor.pblk_address) | |
346 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n")); | |
347 | else if (object.processor.pblk_length != 6) | |
6468463a LB |
348 | printk(KERN_ERR PREFIX "Invalid PBLK length [%d]\n", |
349 | object.processor.pblk_length); | |
1da177e4 LT |
350 | else { |
351 | pr->throttling.address = object.processor.pblk_address; | |
cee324b1 AS |
352 | pr->throttling.duty_offset = acpi_gbl_FADT.duty_offset; |
353 | pr->throttling.duty_width = acpi_gbl_FADT.duty_width; | |
1da177e4 LT |
354 | |
355 | pr->pblk = object.processor.pblk_address; | |
356 | ||
357 | /* | |
358 | * We don't care about error returns - we just try to mark | |
359 | * these reserved so that nobody else is confused into thinking | |
360 | * that this region might be unused.. | |
361 | * | |
362 | * (In particular, allocating the IO range for Cardbus) | |
363 | */ | |
364 | request_region(pr->throttling.address, 6, "ACPI CPU throttle"); | |
365 | } | |
366 | ||
fe086a7b AC |
367 | /* |
368 | * If ACPI describes a slot number for this CPU, we can use it | |
369 | * ensure we get the right value in the "physical id" field | |
370 | * of /proc/cpuinfo | |
371 | */ | |
372 | status = acpi_evaluate_object(pr->handle, "_SUN", NULL, &buffer); | |
373 | if (ACPI_SUCCESS(status)) | |
374 | arch_fix_phys_package_id(pr->id, object.integer.value); | |
375 | ||
d550d98d | 376 | return 0; |
1da177e4 LT |
377 | } |
378 | ||
706546d0 | 379 | static DEFINE_PER_CPU(void *, processor_device_array); |
cd8e2b48 | 380 | |
7ec0a729 | 381 | static void acpi_processor_notify(struct acpi_device *device, u32 event) |
1da177e4 | 382 | { |
7ec0a729 | 383 | struct acpi_processor *pr = acpi_driver_data(device); |
e790cc8b | 384 | int saved; |
1da177e4 LT |
385 | |
386 | if (!pr) | |
d550d98d | 387 | return; |
1da177e4 | 388 | |
1da177e4 LT |
389 | switch (event) { |
390 | case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: | |
e790cc8b | 391 | saved = pr->performance_platform_limit; |
d81c45e1 | 392 | acpi_processor_ppc_has_changed(pr, 1); |
e790cc8b AS |
393 | if (saved == pr->performance_platform_limit) |
394 | break; | |
14e04fb3 | 395 | acpi_bus_generate_proc_event(device, event, |
4be44fcd | 396 | pr->performance_platform_limit); |
962ce8ca | 397 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 398 | dev_name(&device->dev), event, |
962ce8ca | 399 | pr->performance_platform_limit); |
1da177e4 LT |
400 | break; |
401 | case ACPI_PROCESSOR_NOTIFY_POWER: | |
402 | acpi_processor_cst_has_changed(pr); | |
14e04fb3 | 403 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca | 404 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 405 | dev_name(&device->dev), event, 0); |
1da177e4 | 406 | break; |
01854e69 LY |
407 | case ACPI_PROCESSOR_NOTIFY_THROTTLING: |
408 | acpi_processor_tstate_has_changed(pr); | |
14e04fb3 | 409 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca | 410 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 411 | dev_name(&device->dev), event, 0); |
879dca01 | 412 | break; |
1da177e4 LT |
413 | default: |
414 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 415 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
416 | break; |
417 | } | |
418 | ||
d550d98d | 419 | return; |
1da177e4 LT |
420 | } |
421 | ||
729c6ba3 VP |
422 | static int acpi_cpu_soft_notify(struct notifier_block *nfb, |
423 | unsigned long action, void *hcpu) | |
424 | { | |
425 | unsigned int cpu = (unsigned long)hcpu; | |
706546d0 | 426 | struct acpi_processor *pr = per_cpu(processors, cpu); |
729c6ba3 VP |
427 | |
428 | if (action == CPU_ONLINE && pr) { | |
99b72508 TR |
429 | /* CPU got physically hotplugged and onlined the first time: |
430 | * Initialize missing things | |
431 | */ | |
432 | if (pr->flags.need_hotplug_init) { | |
99b72508 TR |
433 | printk(KERN_INFO "Will online and init hotplugged " |
434 | "CPU: %d\n", pr->id); | |
435 | WARN(acpi_processor_start(pr), "Failed to start CPU:" | |
436 | " %d\n", pr->id); | |
437 | pr->flags.need_hotplug_init = 0; | |
99b72508 TR |
438 | /* Normal CPU soft online event */ |
439 | } else { | |
440 | acpi_processor_ppc_has_changed(pr, 0); | |
b7db60f4 | 441 | acpi_processor_hotplug(pr); |
99b72508 TR |
442 | acpi_processor_reevaluate_tstate(pr, action); |
443 | acpi_processor_tstate_has_changed(pr); | |
444 | } | |
729c6ba3 | 445 | } |
5a344a50 ZY |
446 | if (action == CPU_DEAD && pr) { |
447 | /* invalidate the flag.throttling after one CPU is offline */ | |
448 | acpi_processor_reevaluate_tstate(pr, action); | |
449 | } | |
729c6ba3 VP |
450 | return NOTIFY_OK; |
451 | } | |
452 | ||
453 | static struct notifier_block acpi_cpu_notifier = | |
454 | { | |
455 | .notifier_call = acpi_cpu_soft_notify, | |
456 | }; | |
457 | ||
99b72508 TR |
458 | /* |
459 | * acpi_processor_start() is called by the cpu_hotplug_notifier func: | |
460 | * acpi_cpu_soft_notify(). Getting it __cpuinit{data} is difficult, the | |
461 | * root cause seem to be that acpi_processor_uninstall_hotplug_notify() | |
462 | * is in the module_exit (__exit) func. Allowing acpi_processor_start() | |
463 | * to not be in __cpuinit section, but being called from __cpuinit funcs | |
464 | * via __ref looks like the right thing to do here. | |
465 | */ | |
466 | static __ref int acpi_processor_start(struct acpi_processor *pr) | |
54d5dcc4 TR |
467 | { |
468 | struct acpi_device *device = per_cpu(processor_device_array, pr->id); | |
469 | int result = 0; | |
470 | ||
471 | #ifdef CONFIG_CPU_FREQ | |
472 | acpi_processor_ppc_has_changed(pr, 0); | |
976a0be0 | 473 | acpi_processor_load_module(pr); |
54d5dcc4 TR |
474 | #endif |
475 | acpi_processor_get_throttling_info(pr); | |
476 | acpi_processor_get_limit_info(pr); | |
477 | ||
478 | if (!cpuidle_get_driver() || cpuidle_get_driver() == &acpi_idle_driver) | |
38a991b6 | 479 | acpi_processor_power_init(pr); |
54d5dcc4 TR |
480 | |
481 | pr->cdev = thermal_cooling_device_register("Processor", device, | |
482 | &processor_cooling_ops); | |
483 | if (IS_ERR(pr->cdev)) { | |
484 | result = PTR_ERR(pr->cdev); | |
485 | goto err_power_exit; | |
486 | } | |
487 | ||
488 | dev_dbg(&device->dev, "registered as cooling_device%d\n", | |
489 | pr->cdev->id); | |
490 | ||
491 | result = sysfs_create_link(&device->dev.kobj, | |
492 | &pr->cdev->device.kobj, | |
493 | "thermal_cooling"); | |
494 | if (result) { | |
495 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
496 | goto err_thermal_unregister; | |
497 | } | |
498 | result = sysfs_create_link(&pr->cdev->device.kobj, | |
499 | &device->dev.kobj, | |
500 | "device"); | |
501 | if (result) { | |
502 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
503 | goto err_remove_sysfs_thermal; | |
504 | } | |
505 | ||
506 | return 0; | |
507 | ||
508 | err_remove_sysfs_thermal: | |
509 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); | |
510 | err_thermal_unregister: | |
511 | thermal_cooling_device_unregister(pr->cdev); | |
512 | err_power_exit: | |
38a991b6 | 513 | acpi_processor_power_exit(pr); |
54d5dcc4 TR |
514 | |
515 | return result; | |
516 | } | |
517 | ||
99b72508 TR |
518 | /* |
519 | * Do not put anything in here which needs the core to be online. | |
520 | * For example MSR access or setting up things which check for cpuinfo_x86 | |
521 | * (cpu_data(cpu)) values, like CPU feature flags, family, model, etc. | |
522 | * Such things have to be put in and set up above in acpi_processor_start() | |
523 | */ | |
941b10fa | 524 | static int __cpuinit acpi_processor_add(struct acpi_device *device) |
1da177e4 | 525 | { |
4be44fcd | 526 | struct acpi_processor *pr = NULL; |
970b0492 | 527 | int result = 0; |
8a25a2fd | 528 | struct device *dev; |
1da177e4 | 529 | |
36bcbec7 | 530 | pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL); |
1da177e4 | 531 | if (!pr) |
d550d98d | 532 | return -ENOMEM; |
1da177e4 | 533 | |
eaa95840 | 534 | if (!zalloc_cpumask_var(&pr->throttling.shared_cpu_map, GFP_KERNEL)) { |
c80f5b31 JL |
535 | result = -ENOMEM; |
536 | goto err_free_pr; | |
2fdf66b4 RR |
537 | } |
538 | ||
1da177e4 LT |
539 | pr->handle = device->handle; |
540 | strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); | |
541 | strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); | |
db89b4f0 | 542 | device->driver_data = pr; |
1da177e4 | 543 | |
b26e9286 | 544 | result = acpi_processor_get_info(device); |
1da177e4 LT |
545 | if (result) { |
546 | /* Processor is physically not present */ | |
d550d98d | 547 | return 0; |
1da177e4 LT |
548 | } |
549 | ||
75cbfb97 TR |
550 | #ifdef CONFIG_SMP |
551 | if (pr->id >= setup_max_cpus && pr->id != 0) | |
552 | return 0; | |
553 | #endif | |
554 | ||
fbb43ab0 | 555 | BUG_ON((pr->id >= nr_cpu_ids) || (pr->id < 0)); |
1da177e4 | 556 | |
cd8e2b48 VP |
557 | /* |
558 | * Buggy BIOS check | |
559 | * ACPI id of processors can be reported wrongly by the BIOS. | |
560 | * Don't trust it blindly | |
561 | */ | |
706546d0 MT |
562 | if (per_cpu(processor_device_array, pr->id) != NULL && |
563 | per_cpu(processor_device_array, pr->id) != device) { | |
4fdb2a05 | 564 | printk(KERN_WARNING "BIOS reported wrong ACPI id " |
0eacee58 | 565 | "for the processor\n"); |
970b0492 BH |
566 | result = -ENODEV; |
567 | goto err_free_cpumask; | |
cd8e2b48 | 568 | } |
706546d0 | 569 | per_cpu(processor_device_array, pr->id) = device; |
cd8e2b48 | 570 | |
706546d0 | 571 | per_cpu(processors, pr->id) = pr; |
1da177e4 | 572 | |
8a25a2fd KS |
573 | dev = get_cpu_device(pr->id); |
574 | if (sysfs_create_link(&device->dev.kobj, &dev->kobj, "sysdev")) { | |
d4e05261 | 575 | result = -EFAULT; |
c80f5b31 | 576 | goto err_clear_processor; |
d4e05261 | 577 | } |
9f1eb99c | 578 | |
99b72508 TR |
579 | /* |
580 | * Do not start hotplugged CPUs now, but when they | |
581 | * are onlined the first time | |
582 | */ | |
583 | if (pr->flags.need_hotplug_init) | |
584 | return 0; | |
9030062f | 585 | |
54d5dcc4 TR |
586 | result = acpi_processor_start(pr); |
587 | if (result) | |
d4e05261 | 588 | goto err_remove_sysfs; |
d9460fd2 | 589 | |
d550d98d | 590 | return 0; |
d4e05261 BH |
591 | |
592 | err_remove_sysfs: | |
3333ea78 | 593 | sysfs_remove_link(&device->dev.kobj, "sysdev"); |
c80f5b31 JL |
594 | err_clear_processor: |
595 | /* | |
596 | * processor_device_array is not cleared to allow checks for buggy BIOS | |
597 | */ | |
598 | per_cpu(processors, pr->id) = NULL; | |
970b0492 BH |
599 | err_free_cpumask: |
600 | free_cpumask_var(pr->throttling.shared_cpu_map); | |
c80f5b31 JL |
601 | err_free_pr: |
602 | kfree(pr); | |
d550d98d | 603 | return result; |
1da177e4 LT |
604 | } |
605 | ||
4be44fcd | 606 | static int acpi_processor_remove(struct acpi_device *device, int type) |
1da177e4 | 607 | { |
4be44fcd | 608 | struct acpi_processor *pr = NULL; |
1da177e4 | 609 | |
1da177e4 LT |
610 | |
611 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 612 | return -EINVAL; |
1da177e4 | 613 | |
50dd0969 | 614 | pr = acpi_driver_data(device); |
1da177e4 | 615 | |
2fdf66b4 RR |
616 | if (pr->id >= nr_cpu_ids) |
617 | goto free; | |
1da177e4 LT |
618 | |
619 | if (type == ACPI_BUS_REMOVAL_EJECT) { | |
620 | if (acpi_processor_handle_eject(pr)) | |
d550d98d | 621 | return -EINVAL; |
1da177e4 LT |
622 | } |
623 | ||
38a991b6 | 624 | acpi_processor_power_exit(pr); |
1da177e4 | 625 | |
9f1eb99c ZR |
626 | sysfs_remove_link(&device->dev.kobj, "sysdev"); |
627 | ||
f28bb45e ZY |
628 | if (pr->cdev) { |
629 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); | |
630 | sysfs_remove_link(&pr->cdev->device.kobj, "device"); | |
631 | thermal_cooling_device_unregister(pr->cdev); | |
632 | pr->cdev = NULL; | |
633 | } | |
d9460fd2 | 634 | |
706546d0 MT |
635 | per_cpu(processors, pr->id) = NULL; |
636 | per_cpu(processor_device_array, pr->id) = NULL; | |
2fdf66b4 RR |
637 | |
638 | free: | |
639 | free_cpumask_var(pr->throttling.shared_cpu_map); | |
1da177e4 LT |
640 | kfree(pr); |
641 | ||
d550d98d | 642 | return 0; |
1da177e4 LT |
643 | } |
644 | ||
645 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
646 | /**************************************************************************** | |
647 | * Acpi processor hotplug support * | |
648 | ****************************************************************************/ | |
649 | ||
4be44fcd | 650 | static int is_processor_present(acpi_handle handle) |
1da177e4 | 651 | { |
4be44fcd | 652 | acpi_status status; |
27663c58 | 653 | unsigned long long sta = 0; |
1da177e4 | 654 | |
1da177e4 LT |
655 | |
656 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
cfaf3747 ZR |
657 | |
658 | if (ACPI_SUCCESS(status) && (sta & ACPI_STA_DEVICE_PRESENT)) | |
659 | return 1; | |
660 | ||
d0ce46f5 ZR |
661 | /* |
662 | * _STA is mandatory for a processor that supports hot plug | |
663 | */ | |
664 | if (status == AE_NOT_FOUND) | |
665 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
666 | "Processor does not support hot plug\n")); | |
667 | else | |
668 | ACPI_EXCEPTION((AE_INFO, status, | |
669 | "Processor Device is not present")); | |
cfaf3747 | 670 | return 0; |
1da177e4 LT |
671 | } |
672 | ||
1da177e4 | 673 | static |
4be44fcd | 674 | int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 675 | { |
4be44fcd LB |
676 | acpi_handle phandle; |
677 | struct acpi_device *pdev; | |
1da177e4 | 678 | |
1da177e4 LT |
679 | |
680 | if (acpi_get_parent(handle, &phandle)) { | |
d550d98d | 681 | return -ENODEV; |
1da177e4 LT |
682 | } |
683 | ||
684 | if (acpi_bus_get_device(phandle, &pdev)) { | |
d550d98d | 685 | return -ENODEV; |
1da177e4 LT |
686 | } |
687 | ||
688 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { | |
d550d98d | 689 | return -ENODEV; |
1da177e4 LT |
690 | } |
691 | ||
d550d98d | 692 | return 0; |
1da177e4 LT |
693 | } |
694 | ||
6430c9c1 JB |
695 | static void acpi_processor_hotplug_notify(acpi_handle handle, |
696 | u32 event, void *data) | |
1da177e4 | 697 | { |
4be44fcd | 698 | struct acpi_device *device = NULL; |
c5b18e22 | 699 | struct acpi_eject_event *ej_event = NULL; |
51af3b92 | 700 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */ |
1da177e4 LT |
701 | int result; |
702 | ||
1da177e4 LT |
703 | switch (event) { |
704 | case ACPI_NOTIFY_BUS_CHECK: | |
705 | case ACPI_NOTIFY_DEVICE_CHECK: | |
d6f882e1 GC |
706 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
707 | "Processor driver received %s event\n", | |
4be44fcd | 708 | (event == ACPI_NOTIFY_BUS_CHECK) ? |
d6f882e1 | 709 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK")); |
1da177e4 LT |
710 | |
711 | if (!is_processor_present(handle)) | |
712 | break; | |
713 | ||
51af3b92 TK |
714 | if (!acpi_bus_get_device(handle, &device)) |
715 | break; | |
716 | ||
717 | result = acpi_processor_device_add(handle, &device); | |
718 | if (result) { | |
719 | printk(KERN_ERR PREFIX "Unable to add the device\n"); | |
1da177e4 LT |
720 | break; |
721 | } | |
51af3b92 TK |
722 | |
723 | ost_code = ACPI_OST_SC_SUCCESS; | |
4be44fcd | 724 | break; |
51af3b92 | 725 | |
1da177e4 | 726 | case ACPI_NOTIFY_EJECT_REQUEST: |
4be44fcd LB |
727 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
728 | "received ACPI_NOTIFY_EJECT_REQUEST\n")); | |
1da177e4 LT |
729 | |
730 | if (acpi_bus_get_device(handle, &device)) { | |
c5b18e22 | 731 | pr_err(PREFIX "Device don't exist, dropping EJECT\n"); |
1da177e4 LT |
732 | break; |
733 | } | |
c5b18e22 TK |
734 | if (!acpi_driver_data(device)) { |
735 | pr_err(PREFIX "Driver data is NULL, dropping EJECT\n"); | |
51af3b92 | 736 | break; |
1da177e4 | 737 | } |
51af3b92 | 738 | |
c5b18e22 TK |
739 | ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); |
740 | if (!ej_event) { | |
741 | pr_err(PREFIX "No memory, dropping EJECT\n"); | |
742 | break; | |
743 | } | |
744 | ||
745 | ej_event->handle = handle; | |
746 | ej_event->event = ACPI_NOTIFY_EJECT_REQUEST; | |
747 | acpi_os_hotplug_execute(acpi_bus_hot_remove_device, | |
748 | (void *)ej_event); | |
749 | ||
750 | /* eject is performed asynchronously */ | |
751 | return; | |
51af3b92 | 752 | |
1da177e4 LT |
753 | default: |
754 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 755 | "Unsupported event [0x%x]\n", event)); |
51af3b92 TK |
756 | |
757 | /* non-hotplug event; possibly handled by other handler */ | |
758 | return; | |
1da177e4 LT |
759 | } |
760 | ||
51af3b92 TK |
761 | /* Inform firmware that the hotplug operation has completed */ |
762 | (void) acpi_evaluate_hotplug_ost(handle, event, ost_code, NULL); | |
d550d98d | 763 | return; |
1da177e4 LT |
764 | } |
765 | ||
9f324bda TK |
766 | static acpi_status is_processor_device(acpi_handle handle) |
767 | { | |
768 | struct acpi_device_info *info; | |
769 | char *hid; | |
770 | acpi_status status; | |
771 | ||
772 | status = acpi_get_object_info(handle, &info); | |
773 | if (ACPI_FAILURE(status)) | |
774 | return status; | |
775 | ||
776 | if (info->type == ACPI_TYPE_PROCESSOR) { | |
777 | kfree(info); | |
778 | return AE_OK; /* found a processor object */ | |
779 | } | |
780 | ||
781 | if (!(info->valid & ACPI_VALID_HID)) { | |
782 | kfree(info); | |
783 | return AE_ERROR; | |
784 | } | |
785 | ||
786 | hid = info->hardware_id.string; | |
787 | if ((hid == NULL) || strcmp(hid, ACPI_PROCESSOR_DEVICE_HID)) { | |
788 | kfree(info); | |
789 | return AE_ERROR; | |
790 | } | |
791 | ||
792 | kfree(info); | |
793 | return AE_OK; /* found a processor device object */ | |
794 | } | |
795 | ||
1da177e4 LT |
796 | static acpi_status |
797 | processor_walk_namespace_cb(acpi_handle handle, | |
4be44fcd | 798 | u32 lvl, void *context, void **rv) |
1da177e4 | 799 | { |
4be44fcd | 800 | acpi_status status; |
1da177e4 | 801 | int *action = context; |
1da177e4 | 802 | |
9f324bda | 803 | status = is_processor_device(handle); |
1da177e4 | 804 | if (ACPI_FAILURE(status)) |
9f324bda | 805 | return AE_OK; /* not a processor; continue to walk */ |
1da177e4 | 806 | |
4be44fcd | 807 | switch (*action) { |
1da177e4 LT |
808 | case INSTALL_NOTIFY_HANDLER: |
809 | acpi_install_notify_handler(handle, | |
4be44fcd LB |
810 | ACPI_SYSTEM_NOTIFY, |
811 | acpi_processor_hotplug_notify, | |
812 | NULL); | |
1da177e4 LT |
813 | break; |
814 | case UNINSTALL_NOTIFY_HANDLER: | |
815 | acpi_remove_notify_handler(handle, | |
4be44fcd LB |
816 | ACPI_SYSTEM_NOTIFY, |
817 | acpi_processor_hotplug_notify); | |
1da177e4 LT |
818 | break; |
819 | default: | |
820 | break; | |
821 | } | |
822 | ||
9f324bda TK |
823 | /* found a processor; skip walking underneath */ |
824 | return AE_CTRL_DEPTH; | |
1da177e4 LT |
825 | } |
826 | ||
3bd81a87 | 827 | static acpi_status acpi_processor_hotadd_init(struct acpi_processor *pr) |
1da177e4 | 828 | { |
3bd81a87 | 829 | acpi_handle handle = pr->handle; |
1da177e4 LT |
830 | |
831 | if (!is_processor_present(handle)) { | |
d550d98d | 832 | return AE_ERROR; |
1da177e4 LT |
833 | } |
834 | ||
3bd81a87 | 835 | if (acpi_map_lsapic(handle, &pr->id)) |
d550d98d | 836 | return AE_ERROR; |
1da177e4 | 837 | |
3bd81a87 TR |
838 | if (arch_register_cpu(pr->id)) { |
839 | acpi_unmap_lsapic(pr->id); | |
d550d98d | 840 | return AE_ERROR; |
1da177e4 LT |
841 | } |
842 | ||
99b72508 TR |
843 | /* CPU got hot-plugged, but cpu_data is not initialized yet |
844 | * Set flag to delay cpu_idle/throttling initialization | |
845 | * in: | |
846 | * acpi_processor_add() | |
847 | * acpi_processor_get_info() | |
848 | * and do it when the CPU gets online the first time | |
849 | * TBD: Cleanup above functions and try to do this more elegant. | |
850 | */ | |
851 | printk(KERN_INFO "CPU %d got hotplugged\n", pr->id); | |
852 | pr->flags.need_hotplug_init = 1; | |
853 | ||
d550d98d | 854 | return AE_OK; |
1da177e4 LT |
855 | } |
856 | ||
4be44fcd | 857 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 | 858 | { |
b62b8ef9 ZR |
859 | if (cpu_online(pr->id)) |
860 | cpu_down(pr->id); | |
861 | ||
5e5041f3 YI |
862 | get_online_cpus(); |
863 | /* | |
864 | * The cpu might become online again at this point. So we check whether | |
865 | * the cpu has been onlined or not. If the cpu became online, it means | |
866 | * that someone wants to use the cpu. So acpi_processor_handle_eject() | |
867 | * returns -EAGAIN. | |
868 | */ | |
869 | if (unlikely(cpu_online(pr->id))) { | |
870 | put_online_cpus(); | |
871 | pr_warn("Failed to remove CPU %d, because other task " | |
872 | "brought the CPU back online\n", pr->id); | |
873 | return -EAGAIN; | |
874 | } | |
1da177e4 LT |
875 | arch_unregister_cpu(pr->id); |
876 | acpi_unmap_lsapic(pr->id); | |
5e5041f3 | 877 | put_online_cpus(); |
4be44fcd | 878 | return (0); |
1da177e4 LT |
879 | } |
880 | #else | |
3bd81a87 | 881 | static acpi_status acpi_processor_hotadd_init(struct acpi_processor *pr) |
1da177e4 LT |
882 | { |
883 | return AE_ERROR; | |
884 | } | |
4be44fcd | 885 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 | 886 | { |
4be44fcd | 887 | return (-EINVAL); |
1da177e4 LT |
888 | } |
889 | #endif | |
890 | ||
1da177e4 LT |
891 | static |
892 | void acpi_processor_install_hotplug_notify(void) | |
893 | { | |
894 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
895 | int action = INSTALL_NOTIFY_HANDLER; | |
9f324bda | 896 | acpi_walk_namespace(ACPI_TYPE_ANY, |
4be44fcd LB |
897 | ACPI_ROOT_OBJECT, |
898 | ACPI_UINT32_MAX, | |
2263576c | 899 | processor_walk_namespace_cb, NULL, &action, NULL); |
1da177e4 | 900 | #endif |
729c6ba3 | 901 | register_hotcpu_notifier(&acpi_cpu_notifier); |
1da177e4 LT |
902 | } |
903 | ||
1da177e4 LT |
904 | static |
905 | void acpi_processor_uninstall_hotplug_notify(void) | |
906 | { | |
907 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
908 | int action = UNINSTALL_NOTIFY_HANDLER; | |
9f324bda | 909 | acpi_walk_namespace(ACPI_TYPE_ANY, |
4be44fcd LB |
910 | ACPI_ROOT_OBJECT, |
911 | ACPI_UINT32_MAX, | |
2263576c | 912 | processor_walk_namespace_cb, NULL, &action, NULL); |
1da177e4 | 913 | #endif |
729c6ba3 | 914 | unregister_hotcpu_notifier(&acpi_cpu_notifier); |
1da177e4 LT |
915 | } |
916 | ||
917 | /* | |
918 | * We keep the driver loaded even when ACPI is not running. | |
919 | * This is needed for the powernow-k8 driver, that works even without | |
920 | * ACPI, but needs symbols from this driver | |
921 | */ | |
922 | ||
4be44fcd | 923 | static int __init acpi_processor_init(void) |
1da177e4 | 924 | { |
4be44fcd | 925 | int result = 0; |
1da177e4 | 926 | |
ce8442b5 YL |
927 | if (acpi_disabled) |
928 | return 0; | |
929 | ||
1da177e4 | 930 | result = acpi_bus_register_driver(&acpi_processor_driver); |
4f86d3a8 | 931 | if (result < 0) |
46bcfad7 | 932 | return result; |
1da177e4 LT |
933 | |
934 | acpi_processor_install_hotplug_notify(); | |
935 | ||
936 | acpi_thermal_cpufreq_init(); | |
937 | ||
938 | acpi_processor_ppc_init(); | |
939 | ||
1180509f ZY |
940 | acpi_processor_throttling_init(); |
941 | ||
d550d98d | 942 | return 0; |
1da177e4 LT |
943 | } |
944 | ||
4be44fcd | 945 | static void __exit acpi_processor_exit(void) |
1da177e4 | 946 | { |
ce8442b5 YL |
947 | if (acpi_disabled) |
948 | return; | |
949 | ||
1da177e4 LT |
950 | acpi_processor_ppc_exit(); |
951 | ||
952 | acpi_thermal_cpufreq_exit(); | |
953 | ||
954 | acpi_processor_uninstall_hotplug_notify(); | |
955 | ||
956 | acpi_bus_unregister_driver(&acpi_processor_driver); | |
957 | ||
d550d98d | 958 | return; |
1da177e4 LT |
959 | } |
960 | ||
1da177e4 LT |
961 | module_init(acpi_processor_init); |
962 | module_exit(acpi_processor_exit); | |
963 | ||
1da177e4 | 964 | MODULE_ALIAS("processor"); |