Commit | Line | Data |
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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> | |
47 | ||
48 | #include <asm/io.h> | |
49 | #include <asm/system.h> | |
50 | #include <asm/cpu.h> | |
51 | #include <asm/delay.h> | |
52 | #include <asm/uaccess.h> | |
53 | #include <asm/processor.h> | |
54 | #include <asm/smp.h> | |
55 | #include <asm/acpi.h> | |
56 | ||
57 | #include <acpi/acpi_bus.h> | |
58 | #include <acpi/acpi_drivers.h> | |
59 | #include <acpi/processor.h> | |
60 | ||
1da177e4 LT |
61 | #define ACPI_PROCESSOR_COMPONENT 0x01000000 |
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 | |
69 | ||
70 | #define ACPI_PROCESSOR_LIMIT_USER 0 | |
71 | #define ACPI_PROCESSOR_LIMIT_THERMAL 1 | |
72 | ||
1da177e4 | 73 | #define _COMPONENT ACPI_PROCESSOR_COMPONENT |
f52fd66d | 74 | ACPI_MODULE_NAME("processor_core"); |
1da177e4 | 75 | |
f52fd66d | 76 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 77 | MODULE_DESCRIPTION("ACPI Processor Driver"); |
1da177e4 LT |
78 | MODULE_LICENSE("GPL"); |
79 | ||
4be44fcd LB |
80 | static int acpi_processor_add(struct acpi_device *device); |
81 | static int acpi_processor_start(struct acpi_device *device); | |
82 | static int acpi_processor_remove(struct acpi_device *device, int type); | |
1da177e4 | 83 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file); |
4be44fcd | 84 | static void acpi_processor_notify(acpi_handle handle, u32 event, void *data); |
1da177e4 LT |
85 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu); |
86 | static int acpi_processor_handle_eject(struct acpi_processor *pr); | |
87 | ||
88 | static struct acpi_driver acpi_processor_driver = { | |
c2b6705b | 89 | .name = "processor", |
4be44fcd LB |
90 | .class = ACPI_PROCESSOR_CLASS, |
91 | .ids = ACPI_PROCESSOR_HID, | |
92 | .ops = { | |
93 | .add = acpi_processor_add, | |
94 | .remove = acpi_processor_remove, | |
95 | .start = acpi_processor_start, | |
96 | }, | |
1da177e4 LT |
97 | }; |
98 | ||
99 | #define INSTALL_NOTIFY_HANDLER 1 | |
100 | #define UNINSTALL_NOTIFY_HANDLER 2 | |
101 | ||
d7508032 | 102 | static const struct file_operations acpi_processor_info_fops = { |
4be44fcd LB |
103 | .open = acpi_processor_info_open_fs, |
104 | .read = seq_read, | |
105 | .llseek = seq_lseek, | |
106 | .release = single_release, | |
1da177e4 LT |
107 | }; |
108 | ||
4be44fcd | 109 | struct acpi_processor *processors[NR_CPUS]; |
9f222718 | 110 | struct acpi_processor_errata errata __read_mostly; |
1da177e4 | 111 | |
1da177e4 LT |
112 | /* -------------------------------------------------------------------------- |
113 | Errata Handling | |
114 | -------------------------------------------------------------------------- */ | |
115 | ||
4be44fcd | 116 | static int acpi_processor_errata_piix4(struct pci_dev *dev) |
1da177e4 | 117 | { |
4be44fcd LB |
118 | u8 value1 = 0; |
119 | u8 value2 = 0; | |
1da177e4 | 120 | |
1da177e4 LT |
121 | |
122 | if (!dev) | |
d550d98d | 123 | return -EINVAL; |
1da177e4 LT |
124 | |
125 | /* | |
126 | * Note that 'dev' references the PIIX4 ACPI Controller. | |
127 | */ | |
128 | ||
44c10138 | 129 | switch (dev->revision) { |
1da177e4 LT |
130 | case 0: |
131 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n")); | |
132 | break; | |
133 | case 1: | |
134 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n")); | |
135 | break; | |
136 | case 2: | |
137 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n")); | |
138 | break; | |
139 | case 3: | |
140 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M\n")); | |
141 | break; | |
142 | default: | |
143 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4\n")); | |
144 | break; | |
145 | } | |
146 | ||
44c10138 | 147 | switch (dev->revision) { |
1da177e4 LT |
148 | |
149 | case 0: /* PIIX4 A-step */ | |
150 | case 1: /* PIIX4 B-step */ | |
151 | /* | |
152 | * See specification changes #13 ("Manual Throttle Duty Cycle") | |
153 | * and #14 ("Enabling and Disabling Manual Throttle"), plus | |
154 | * erratum #5 ("STPCLK# Deassertion Time") from the January | |
155 | * 2002 PIIX4 specification update. Applies to only older | |
156 | * PIIX4 models. | |
157 | */ | |
158 | errata.piix4.throttle = 1; | |
159 | ||
160 | case 2: /* PIIX4E */ | |
161 | case 3: /* PIIX4M */ | |
162 | /* | |
163 | * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA | |
164 | * Livelock") from the January 2002 PIIX4 specification update. | |
165 | * Applies to all PIIX4 models. | |
166 | */ | |
167 | ||
168 | /* | |
169 | * BM-IDE | |
170 | * ------ | |
171 | * Find the PIIX4 IDE Controller and get the Bus Master IDE | |
172 | * Status register address. We'll use this later to read | |
173 | * each IDE controller's DMA status to make sure we catch all | |
174 | * DMA activity. | |
175 | */ | |
176 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
177 | PCI_DEVICE_ID_INTEL_82371AB, |
178 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
179 | if (dev) { |
180 | errata.piix4.bmisx = pci_resource_start(dev, 4); | |
181 | pci_dev_put(dev); | |
182 | } | |
183 | ||
184 | /* | |
185 | * Type-F DMA | |
186 | * ---------- | |
187 | * Find the PIIX4 ISA Controller and read the Motherboard | |
188 | * DMA controller's status to see if Type-F (Fast) DMA mode | |
189 | * is enabled (bit 7) on either channel. Note that we'll | |
190 | * disable C3 support if this is enabled, as some legacy | |
191 | * devices won't operate well if fast DMA is disabled. | |
192 | */ | |
193 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
194 | PCI_DEVICE_ID_INTEL_82371AB_0, |
195 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
196 | if (dev) { |
197 | pci_read_config_byte(dev, 0x76, &value1); | |
198 | pci_read_config_byte(dev, 0x77, &value2); | |
199 | if ((value1 & 0x80) || (value2 & 0x80)) | |
200 | errata.piix4.fdma = 1; | |
201 | pci_dev_put(dev); | |
202 | } | |
203 | ||
204 | break; | |
205 | } | |
206 | ||
207 | if (errata.piix4.bmisx) | |
208 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 209 | "Bus master activity detection (BM-IDE) erratum enabled\n")); |
1da177e4 LT |
210 | if (errata.piix4.fdma) |
211 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 212 | "Type-F DMA livelock erratum (C3 disabled)\n")); |
1da177e4 | 213 | |
d550d98d | 214 | return 0; |
1da177e4 LT |
215 | } |
216 | ||
8713cbef | 217 | static int acpi_processor_errata(struct acpi_processor *pr) |
1da177e4 | 218 | { |
4be44fcd LB |
219 | int result = 0; |
220 | struct pci_dev *dev = NULL; | |
1da177e4 | 221 | |
1da177e4 LT |
222 | |
223 | if (!pr) | |
d550d98d | 224 | return -EINVAL; |
1da177e4 LT |
225 | |
226 | /* | |
227 | * PIIX4 | |
228 | */ | |
229 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
230 | PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID, |
231 | PCI_ANY_ID, NULL); | |
1da177e4 LT |
232 | if (dev) { |
233 | result = acpi_processor_errata_piix4(dev); | |
234 | pci_dev_put(dev); | |
235 | } | |
236 | ||
d550d98d | 237 | return result; |
1da177e4 LT |
238 | } |
239 | ||
02df8b93 | 240 | /* -------------------------------------------------------------------------- |
0b28002f | 241 | Common ACPI processor functions |
02df8b93 VP |
242 | -------------------------------------------------------------------------- */ |
243 | ||
244 | /* | |
245 | * _PDC is required for a BIOS-OS handshake for most of the newer | |
246 | * ACPI processor features. | |
247 | */ | |
05131ecc | 248 | static int acpi_processor_set_pdc(struct acpi_processor *pr) |
02df8b93 | 249 | { |
05131ecc | 250 | struct acpi_object_list *pdc_in = pr->pdc; |
4be44fcd | 251 | acpi_status status = AE_OK; |
02df8b93 | 252 | |
02df8b93 | 253 | |
05131ecc | 254 | if (!pdc_in) |
d550d98d | 255 | return status; |
02df8b93 | 256 | |
05131ecc | 257 | status = acpi_evaluate_object(pr->handle, "_PDC", pdc_in, NULL); |
02df8b93 | 258 | |
05131ecc | 259 | if (ACPI_FAILURE(status)) |
4be44fcd | 260 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
05131ecc | 261 | "Could not evaluate _PDC, using legacy perf. control...\n")); |
02df8b93 | 262 | |
d550d98d | 263 | return status; |
02df8b93 VP |
264 | } |
265 | ||
1da177e4 LT |
266 | /* -------------------------------------------------------------------------- |
267 | FS Interface (/proc) | |
268 | -------------------------------------------------------------------------- */ | |
269 | ||
4be44fcd | 270 | static struct proc_dir_entry *acpi_processor_dir = NULL; |
1da177e4 LT |
271 | |
272 | static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset) | |
273 | { | |
50dd0969 | 274 | struct acpi_processor *pr = seq->private; |
1da177e4 | 275 | |
1da177e4 LT |
276 | |
277 | if (!pr) | |
278 | goto end; | |
279 | ||
280 | seq_printf(seq, "processor id: %d\n" | |
4be44fcd LB |
281 | "acpi id: %d\n" |
282 | "bus mastering control: %s\n" | |
283 | "power management: %s\n" | |
284 | "throttling control: %s\n" | |
285 | "limit interface: %s\n", | |
286 | pr->id, | |
287 | pr->acpi_id, | |
288 | pr->flags.bm_control ? "yes" : "no", | |
289 | pr->flags.power ? "yes" : "no", | |
290 | pr->flags.throttling ? "yes" : "no", | |
291 | pr->flags.limit ? "yes" : "no"); | |
292 | ||
293 | end: | |
d550d98d | 294 | return 0; |
1da177e4 LT |
295 | } |
296 | ||
297 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file) | |
298 | { | |
299 | return single_open(file, acpi_processor_info_seq_show, | |
4be44fcd | 300 | PDE(inode)->data); |
1da177e4 LT |
301 | } |
302 | ||
4be44fcd | 303 | static int acpi_processor_add_fs(struct acpi_device *device) |
1da177e4 | 304 | { |
4be44fcd | 305 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 306 | |
1da177e4 LT |
307 | |
308 | if (!acpi_device_dir(device)) { | |
309 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 310 | acpi_processor_dir); |
1da177e4 | 311 | if (!acpi_device_dir(device)) |
d550d98d | 312 | return -ENODEV; |
1da177e4 LT |
313 | } |
314 | acpi_device_dir(device)->owner = THIS_MODULE; | |
315 | ||
316 | /* 'info' [R] */ | |
317 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_INFO, | |
4be44fcd | 318 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 319 | if (!entry) |
d550d98d | 320 | return -EIO; |
1da177e4 LT |
321 | else { |
322 | entry->proc_fops = &acpi_processor_info_fops; | |
323 | entry->data = acpi_driver_data(device); | |
324 | entry->owner = THIS_MODULE; | |
325 | } | |
326 | ||
327 | /* 'throttling' [R/W] */ | |
328 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, | |
4be44fcd LB |
329 | S_IFREG | S_IRUGO | S_IWUSR, |
330 | acpi_device_dir(device)); | |
1da177e4 | 331 | if (!entry) |
d550d98d | 332 | return -EIO; |
1da177e4 LT |
333 | else { |
334 | entry->proc_fops = &acpi_processor_throttling_fops; | |
1da177e4 LT |
335 | entry->data = acpi_driver_data(device); |
336 | entry->owner = THIS_MODULE; | |
337 | } | |
338 | ||
339 | /* 'limit' [R/W] */ | |
340 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, | |
4be44fcd LB |
341 | S_IFREG | S_IRUGO | S_IWUSR, |
342 | acpi_device_dir(device)); | |
1da177e4 | 343 | if (!entry) |
d550d98d | 344 | return -EIO; |
1da177e4 LT |
345 | else { |
346 | entry->proc_fops = &acpi_processor_limit_fops; | |
1da177e4 LT |
347 | entry->data = acpi_driver_data(device); |
348 | entry->owner = THIS_MODULE; | |
349 | } | |
350 | ||
d550d98d | 351 | return 0; |
1da177e4 LT |
352 | } |
353 | ||
4be44fcd | 354 | static int acpi_processor_remove_fs(struct acpi_device *device) |
1da177e4 | 355 | { |
1da177e4 LT |
356 | |
357 | if (acpi_device_dir(device)) { | |
4be44fcd LB |
358 | remove_proc_entry(ACPI_PROCESSOR_FILE_INFO, |
359 | acpi_device_dir(device)); | |
1da177e4 | 360 | remove_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, |
4be44fcd LB |
361 | acpi_device_dir(device)); |
362 | remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, | |
363 | acpi_device_dir(device)); | |
1da177e4 LT |
364 | remove_proc_entry(acpi_device_bid(device), acpi_processor_dir); |
365 | acpi_device_dir(device) = NULL; | |
366 | } | |
367 | ||
d550d98d | 368 | return 0; |
1da177e4 LT |
369 | } |
370 | ||
371 | /* Use the acpiid in MADT to map cpus in case of SMP */ | |
f18c5a08 | 372 | |
1da177e4 | 373 | #ifndef CONFIG_SMP |
11bf04c4 | 374 | static int get_cpu_id(acpi_handle handle, u32 acpi_id) {return -1;} |
1da177e4 LT |
375 | #else |
376 | ||
f18c5a08 AS |
377 | static struct acpi_table_madt *madt; |
378 | ||
379 | static int map_lapic_id(struct acpi_subtable_header *entry, | |
380 | u32 acpi_id, int *apic_id) | |
381 | { | |
382 | struct acpi_madt_local_apic *lapic = | |
383 | (struct acpi_madt_local_apic *)entry; | |
384 | if ((lapic->lapic_flags & ACPI_MADT_ENABLED) && | |
385 | lapic->processor_id == acpi_id) { | |
386 | *apic_id = lapic->id; | |
387 | return 1; | |
388 | } | |
389 | return 0; | |
390 | } | |
391 | ||
392 | static int map_lsapic_id(struct acpi_subtable_header *entry, | |
393 | u32 acpi_id, int *apic_id) | |
394 | { | |
395 | struct acpi_madt_local_sapic *lsapic = | |
396 | (struct acpi_madt_local_sapic *)entry; | |
397 | /* Only check enabled APICs*/ | |
398 | if (lsapic->lapic_flags & ACPI_MADT_ENABLED) { | |
399 | /* First check against id */ | |
400 | if (lsapic->processor_id == acpi_id) { | |
615d5f23 | 401 | *apic_id = (lsapic->id << 8) | lsapic->eid; |
f18c5a08 AS |
402 | return 1; |
403 | /* Check against optional uid */ | |
404 | } else if (entry->length >= 16 && | |
405 | lsapic->uid == acpi_id) { | |
406 | *apic_id = lsapic->uid; | |
407 | return 1; | |
408 | } | |
409 | } | |
410 | return 0; | |
411 | } | |
412 | ||
1da177e4 | 413 | #ifdef CONFIG_IA64 |
1da177e4 | 414 | #define arch_cpu_to_apicid ia64_cpu_to_sapicid |
1da177e4 | 415 | #else |
1da177e4 | 416 | #define arch_cpu_to_apicid x86_cpu_to_apicid |
1da177e4 LT |
417 | #endif |
418 | ||
f18c5a08 AS |
419 | static int map_madt_entry(u32 acpi_id) |
420 | { | |
421 | unsigned long madt_end, entry; | |
422 | int apic_id = -1; | |
423 | ||
424 | if (!madt) | |
425 | return apic_id; | |
426 | ||
427 | entry = (unsigned long)madt; | |
428 | madt_end = entry + madt->header.length; | |
429 | ||
430 | /* Parse all entries looking for a match. */ | |
431 | ||
432 | entry += sizeof(struct acpi_table_madt); | |
433 | while (entry + sizeof(struct acpi_subtable_header) < madt_end) { | |
434 | struct acpi_subtable_header *header = | |
435 | (struct acpi_subtable_header *)entry; | |
436 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { | |
437 | if (map_lapic_id(header, acpi_id, &apic_id)) | |
438 | break; | |
439 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { | |
440 | if (map_lsapic_id(header, acpi_id, &apic_id)) | |
441 | break; | |
442 | } | |
443 | entry += header->length; | |
444 | } | |
445 | return apic_id; | |
446 | } | |
447 | ||
448 | static int map_mat_entry(acpi_handle handle, u32 acpi_id) | |
449 | { | |
450 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
451 | union acpi_object *obj; | |
452 | struct acpi_subtable_header *header; | |
453 | int apic_id = -1; | |
454 | ||
455 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) | |
456 | goto exit; | |
457 | ||
458 | if (!buffer.length || !buffer.pointer) | |
459 | goto exit; | |
460 | ||
461 | obj = buffer.pointer; | |
462 | if (obj->type != ACPI_TYPE_BUFFER || | |
463 | obj->buffer.length < sizeof(struct acpi_subtable_header)) { | |
464 | goto exit; | |
465 | } | |
466 | ||
467 | header = (struct acpi_subtable_header *)obj->buffer.pointer; | |
468 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { | |
469 | map_lapic_id(header, acpi_id, &apic_id); | |
470 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { | |
471 | map_lsapic_id(header, acpi_id, &apic_id); | |
472 | } | |
473 | ||
474 | exit: | |
475 | if (buffer.pointer) | |
476 | kfree(buffer.pointer); | |
477 | return apic_id; | |
478 | } | |
479 | ||
11bf04c4 | 480 | static int get_cpu_id(acpi_handle handle, u32 acpi_id) |
1da177e4 | 481 | { |
4a35a46b | 482 | int i; |
f18c5a08 | 483 | int apic_id = -1; |
1da177e4 | 484 | |
f18c5a08 AS |
485 | apic_id = map_mat_entry(handle, acpi_id); |
486 | if (apic_id == -1) | |
487 | apic_id = map_madt_entry(acpi_id); | |
488 | if (apic_id == -1) | |
489 | return apic_id; | |
1da177e4 | 490 | |
f18c5a08 | 491 | for (i = 0; i < NR_CPUS; ++i) { |
4a35a46b LB |
492 | if (arch_cpu_to_apicid[i] == apic_id) |
493 | return i; | |
1da177e4 LT |
494 | } |
495 | return -1; | |
496 | } | |
497 | #endif | |
498 | ||
499 | /* -------------------------------------------------------------------------- | |
500 | Driver Interface | |
501 | -------------------------------------------------------------------------- */ | |
502 | ||
11bf04c4 | 503 | static int acpi_processor_get_info(struct acpi_processor *pr, unsigned has_uid) |
1da177e4 | 504 | { |
4be44fcd LB |
505 | acpi_status status = 0; |
506 | union acpi_object object = { 0 }; | |
507 | struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; | |
df42baa0 | 508 | int cpu_index; |
4be44fcd | 509 | static int cpu0_initialized; |
1da177e4 | 510 | |
1da177e4 LT |
511 | |
512 | if (!pr) | |
d550d98d | 513 | return -EINVAL; |
1da177e4 LT |
514 | |
515 | if (num_online_cpus() > 1) | |
516 | errata.smp = TRUE; | |
517 | ||
518 | acpi_processor_errata(pr); | |
519 | ||
520 | /* | |
521 | * Check to see if we have bus mastering arbitration control. This | |
522 | * is required for proper C3 usage (to maintain cache coherency). | |
523 | */ | |
cee324b1 | 524 | if (acpi_gbl_FADT.pm2_control_block && acpi_gbl_FADT.pm2_control_length) { |
1da177e4 LT |
525 | pr->flags.bm_control = 1; |
526 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd LB |
527 | "Bus mastering arbitration control present\n")); |
528 | } else | |
1da177e4 | 529 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
4be44fcd | 530 | "No bus mastering arbitration control\n")); |
1da177e4 | 531 | |
11bf04c4 AS |
532 | /* Check if it is a Device with HID and UID */ |
533 | if (has_uid) { | |
534 | unsigned long value; | |
535 | status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID, | |
536 | NULL, &value); | |
537 | if (ACPI_FAILURE(status)) { | |
538 | printk(KERN_ERR PREFIX "Evaluating processor _UID\n"); | |
539 | return -ENODEV; | |
540 | } | |
541 | pr->acpi_id = value; | |
542 | } else { | |
543 | /* | |
544 | * Evalute the processor object. Note that it is common on SMP to | |
545 | * have the first (boot) processor with a valid PBLK address while | |
546 | * all others have a NULL address. | |
547 | */ | |
548 | status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); | |
549 | if (ACPI_FAILURE(status)) { | |
550 | printk(KERN_ERR PREFIX "Evaluating processor object\n"); | |
551 | return -ENODEV; | |
552 | } | |
1da177e4 | 553 | |
11bf04c4 AS |
554 | /* |
555 | * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. | |
556 | * >>> 'acpi_get_processor_id(acpi_id, &id)' in arch/xxx/acpi.c | |
557 | */ | |
558 | pr->acpi_id = object.processor.proc_id; | |
559 | } | |
560 | cpu_index = get_cpu_id(pr->handle, pr->acpi_id); | |
1da177e4 | 561 | |
4be44fcd | 562 | /* Handle UP system running SMP kernel, with no LAPIC in MADT */ |
df42baa0 | 563 | if (!cpu0_initialized && (cpu_index == -1) && |
4be44fcd LB |
564 | (num_online_cpus() == 1)) { |
565 | cpu_index = 0; | |
566 | } | |
567 | ||
568 | cpu0_initialized = 1; | |
569 | ||
570 | pr->id = cpu_index; | |
571 | ||
572 | /* | |
573 | * Extra Processor objects may be enumerated on MP systems with | |
574 | * less than the max # of CPUs. They should be ignored _iff | |
575 | * they are physically not present. | |
576 | */ | |
f18c5a08 | 577 | if (pr->id == -1) { |
4be44fcd LB |
578 | if (ACPI_FAILURE |
579 | (acpi_processor_hotadd_init(pr->handle, &pr->id))) { | |
d550d98d | 580 | return -ENODEV; |
4be44fcd LB |
581 | } |
582 | } | |
1da177e4 LT |
583 | |
584 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, | |
4be44fcd | 585 | pr->acpi_id)); |
1da177e4 LT |
586 | |
587 | if (!object.processor.pblk_address) | |
588 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n")); | |
589 | else if (object.processor.pblk_length != 6) | |
6468463a LB |
590 | printk(KERN_ERR PREFIX "Invalid PBLK length [%d]\n", |
591 | object.processor.pblk_length); | |
1da177e4 LT |
592 | else { |
593 | pr->throttling.address = object.processor.pblk_address; | |
cee324b1 AS |
594 | pr->throttling.duty_offset = acpi_gbl_FADT.duty_offset; |
595 | pr->throttling.duty_width = acpi_gbl_FADT.duty_width; | |
1da177e4 LT |
596 | |
597 | pr->pblk = object.processor.pblk_address; | |
598 | ||
599 | /* | |
600 | * We don't care about error returns - we just try to mark | |
601 | * these reserved so that nobody else is confused into thinking | |
602 | * that this region might be unused.. | |
603 | * | |
604 | * (In particular, allocating the IO range for Cardbus) | |
605 | */ | |
606 | request_region(pr->throttling.address, 6, "ACPI CPU throttle"); | |
607 | } | |
608 | ||
609 | #ifdef CONFIG_CPU_FREQ | |
610 | acpi_processor_ppc_has_changed(pr); | |
611 | #endif | |
612 | acpi_processor_get_throttling_info(pr); | |
613 | acpi_processor_get_limit_info(pr); | |
614 | ||
d550d98d | 615 | return 0; |
1da177e4 LT |
616 | } |
617 | ||
cd8e2b48 VP |
618 | static void *processor_device_array[NR_CPUS]; |
619 | ||
7af8b660 | 620 | static int __cpuinit acpi_processor_start(struct acpi_device *device) |
1da177e4 | 621 | { |
4be44fcd LB |
622 | int result = 0; |
623 | acpi_status status = AE_OK; | |
624 | struct acpi_processor *pr; | |
1da177e4 | 625 | |
1da177e4 LT |
626 | |
627 | pr = acpi_driver_data(device); | |
628 | ||
11bf04c4 | 629 | result = acpi_processor_get_info(pr, device->flags.unique_id); |
1da177e4 LT |
630 | if (result) { |
631 | /* Processor is physically not present */ | |
d550d98d | 632 | return 0; |
1da177e4 LT |
633 | } |
634 | ||
635 | BUG_ON((pr->id >= NR_CPUS) || (pr->id < 0)); | |
636 | ||
cd8e2b48 VP |
637 | /* |
638 | * Buggy BIOS check | |
639 | * ACPI id of processors can be reported wrongly by the BIOS. | |
640 | * Don't trust it blindly | |
641 | */ | |
642 | if (processor_device_array[pr->id] != NULL && | |
50dd0969 | 643 | processor_device_array[pr->id] != device) { |
0eacee58 LB |
644 | printk(KERN_WARNING "BIOS reported wrong ACPI id" |
645 | "for the processor\n"); | |
d550d98d | 646 | return -ENODEV; |
cd8e2b48 | 647 | } |
50dd0969 | 648 | processor_device_array[pr->id] = device; |
cd8e2b48 | 649 | |
1da177e4 LT |
650 | processors[pr->id] = pr; |
651 | ||
652 | result = acpi_processor_add_fs(device); | |
653 | if (result) | |
654 | goto end; | |
655 | ||
656 | status = acpi_install_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, | |
4be44fcd | 657 | acpi_processor_notify, pr); |
1da177e4 | 658 | |
05131ecc VP |
659 | /* _PDC call should be done before doing anything else (if reqd.). */ |
660 | arch_acpi_processor_init_pdc(pr); | |
661 | acpi_processor_set_pdc(pr); | |
662 | ||
1da177e4 LT |
663 | acpi_processor_power_init(pr, device); |
664 | ||
665 | if (pr->flags.throttling) { | |
666 | printk(KERN_INFO PREFIX "%s [%s] (supports", | |
4be44fcd | 667 | acpi_device_name(device), acpi_device_bid(device)); |
1da177e4 LT |
668 | printk(" %d throttling states", pr->throttling.state_count); |
669 | printk(")\n"); | |
670 | } | |
671 | ||
4be44fcd | 672 | end: |
1da177e4 | 673 | |
d550d98d | 674 | return result; |
1da177e4 LT |
675 | } |
676 | ||
4be44fcd | 677 | static void acpi_processor_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 678 | { |
50dd0969 | 679 | struct acpi_processor *pr = data; |
4be44fcd | 680 | struct acpi_device *device = NULL; |
1da177e4 | 681 | |
1da177e4 LT |
682 | |
683 | if (!pr) | |
d550d98d | 684 | return; |
1da177e4 LT |
685 | |
686 | if (acpi_bus_get_device(pr->handle, &device)) | |
d550d98d | 687 | return; |
1da177e4 LT |
688 | |
689 | switch (event) { | |
690 | case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: | |
691 | acpi_processor_ppc_has_changed(pr); | |
692 | acpi_bus_generate_event(device, event, | |
4be44fcd | 693 | pr->performance_platform_limit); |
1da177e4 LT |
694 | break; |
695 | case ACPI_PROCESSOR_NOTIFY_POWER: | |
696 | acpi_processor_cst_has_changed(pr); | |
697 | acpi_bus_generate_event(device, event, 0); | |
698 | break; | |
699 | default: | |
700 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 701 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
702 | break; |
703 | } | |
704 | ||
d550d98d | 705 | return; |
1da177e4 LT |
706 | } |
707 | ||
4be44fcd | 708 | static int acpi_processor_add(struct acpi_device *device) |
1da177e4 | 709 | { |
4be44fcd | 710 | struct acpi_processor *pr = NULL; |
1da177e4 | 711 | |
1da177e4 LT |
712 | |
713 | if (!device) | |
d550d98d | 714 | return -EINVAL; |
1da177e4 | 715 | |
36bcbec7 | 716 | pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL); |
1da177e4 | 717 | if (!pr) |
d550d98d | 718 | return -ENOMEM; |
1da177e4 LT |
719 | |
720 | pr->handle = device->handle; | |
721 | strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); | |
722 | strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); | |
723 | acpi_driver_data(device) = pr; | |
724 | ||
d550d98d | 725 | return 0; |
1da177e4 LT |
726 | } |
727 | ||
4be44fcd | 728 | static int acpi_processor_remove(struct acpi_device *device, int type) |
1da177e4 | 729 | { |
4be44fcd LB |
730 | acpi_status status = AE_OK; |
731 | struct acpi_processor *pr = NULL; | |
1da177e4 | 732 | |
1da177e4 LT |
733 | |
734 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 735 | return -EINVAL; |
1da177e4 | 736 | |
50dd0969 | 737 | pr = acpi_driver_data(device); |
1da177e4 LT |
738 | |
739 | if (pr->id >= NR_CPUS) { | |
740 | kfree(pr); | |
d550d98d | 741 | return 0; |
1da177e4 LT |
742 | } |
743 | ||
744 | if (type == ACPI_BUS_REMOVAL_EJECT) { | |
745 | if (acpi_processor_handle_eject(pr)) | |
d550d98d | 746 | return -EINVAL; |
1da177e4 LT |
747 | } |
748 | ||
749 | acpi_processor_power_exit(pr, device); | |
750 | ||
751 | status = acpi_remove_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, | |
4be44fcd | 752 | acpi_processor_notify); |
1da177e4 LT |
753 | |
754 | acpi_processor_remove_fs(device); | |
755 | ||
756 | processors[pr->id] = NULL; | |
757 | ||
758 | kfree(pr); | |
759 | ||
d550d98d | 760 | return 0; |
1da177e4 LT |
761 | } |
762 | ||
763 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
764 | /**************************************************************************** | |
765 | * Acpi processor hotplug support * | |
766 | ****************************************************************************/ | |
767 | ||
768 | static int is_processor_present(acpi_handle handle); | |
769 | ||
4be44fcd | 770 | static int is_processor_present(acpi_handle handle) |
1da177e4 | 771 | { |
4be44fcd LB |
772 | acpi_status status; |
773 | unsigned long sta = 0; | |
1da177e4 | 774 | |
1da177e4 LT |
775 | |
776 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
a0bd4ac4 | 777 | if (ACPI_FAILURE(status) || !(sta & ACPI_STA_DEVICE_PRESENT)) { |
a6fc6720 | 778 | ACPI_EXCEPTION((AE_INFO, status, "Processor Device is not present")); |
d550d98d | 779 | return 0; |
1da177e4 | 780 | } |
d550d98d | 781 | return 1; |
1da177e4 LT |
782 | } |
783 | ||
1da177e4 | 784 | static |
4be44fcd | 785 | int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 786 | { |
4be44fcd LB |
787 | acpi_handle phandle; |
788 | struct acpi_device *pdev; | |
789 | struct acpi_processor *pr; | |
1da177e4 | 790 | |
1da177e4 LT |
791 | |
792 | if (acpi_get_parent(handle, &phandle)) { | |
d550d98d | 793 | return -ENODEV; |
1da177e4 LT |
794 | } |
795 | ||
796 | if (acpi_bus_get_device(phandle, &pdev)) { | |
d550d98d | 797 | return -ENODEV; |
1da177e4 LT |
798 | } |
799 | ||
800 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { | |
d550d98d | 801 | return -ENODEV; |
1da177e4 LT |
802 | } |
803 | ||
3fb02738 | 804 | acpi_bus_start(*device); |
1da177e4 LT |
805 | |
806 | pr = acpi_driver_data(*device); | |
807 | if (!pr) | |
d550d98d | 808 | return -ENODEV; |
1da177e4 | 809 | |
4be44fcd | 810 | if ((pr->id >= 0) && (pr->id < NR_CPUS)) { |
f883d9db | 811 | kobject_uevent(&(*device)->dev.kobj, KOBJ_ONLINE); |
1da177e4 | 812 | } |
d550d98d | 813 | return 0; |
1da177e4 LT |
814 | } |
815 | ||
1da177e4 | 816 | static void |
4be44fcd | 817 | acpi_processor_hotplug_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 818 | { |
4be44fcd LB |
819 | struct acpi_processor *pr; |
820 | struct acpi_device *device = NULL; | |
1da177e4 LT |
821 | int result; |
822 | ||
1da177e4 LT |
823 | |
824 | switch (event) { | |
825 | case ACPI_NOTIFY_BUS_CHECK: | |
826 | case ACPI_NOTIFY_DEVICE_CHECK: | |
827 | printk("Processor driver received %s event\n", | |
4be44fcd LB |
828 | (event == ACPI_NOTIFY_BUS_CHECK) ? |
829 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK"); | |
1da177e4 LT |
830 | |
831 | if (!is_processor_present(handle)) | |
832 | break; | |
833 | ||
834 | if (acpi_bus_get_device(handle, &device)) { | |
835 | result = acpi_processor_device_add(handle, &device); | |
836 | if (result) | |
6468463a LB |
837 | printk(KERN_ERR PREFIX |
838 | "Unable to add the device\n"); | |
1da177e4 LT |
839 | break; |
840 | } | |
841 | ||
842 | pr = acpi_driver_data(device); | |
843 | if (!pr) { | |
6468463a | 844 | printk(KERN_ERR PREFIX "Driver data is NULL\n"); |
1da177e4 LT |
845 | break; |
846 | } | |
847 | ||
848 | if (pr->id >= 0 && (pr->id < NR_CPUS)) { | |
f883d9db | 849 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
1da177e4 LT |
850 | break; |
851 | } | |
852 | ||
853 | result = acpi_processor_start(device); | |
4be44fcd | 854 | if ((!result) && ((pr->id >= 0) && (pr->id < NR_CPUS))) { |
f883d9db | 855 | kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); |
1da177e4 | 856 | } else { |
6468463a LB |
857 | printk(KERN_ERR PREFIX "Device [%s] failed to start\n", |
858 | acpi_device_bid(device)); | |
1da177e4 | 859 | } |
4be44fcd | 860 | break; |
1da177e4 | 861 | case ACPI_NOTIFY_EJECT_REQUEST: |
4be44fcd LB |
862 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
863 | "received ACPI_NOTIFY_EJECT_REQUEST\n")); | |
1da177e4 LT |
864 | |
865 | if (acpi_bus_get_device(handle, &device)) { | |
6468463a LB |
866 | printk(KERN_ERR PREFIX |
867 | "Device don't exist, dropping EJECT\n"); | |
1da177e4 LT |
868 | break; |
869 | } | |
870 | pr = acpi_driver_data(device); | |
871 | if (!pr) { | |
6468463a LB |
872 | printk(KERN_ERR PREFIX |
873 | "Driver data is NULL, dropping EJECT\n"); | |
d550d98d | 874 | return; |
1da177e4 LT |
875 | } |
876 | ||
877 | if ((pr->id < NR_CPUS) && (cpu_present(pr->id))) | |
f883d9db | 878 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
1da177e4 LT |
879 | break; |
880 | default: | |
881 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 882 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
883 | break; |
884 | } | |
885 | ||
d550d98d | 886 | return; |
1da177e4 LT |
887 | } |
888 | ||
889 | static acpi_status | |
890 | processor_walk_namespace_cb(acpi_handle handle, | |
4be44fcd | 891 | u32 lvl, void *context, void **rv) |
1da177e4 | 892 | { |
4be44fcd | 893 | acpi_status status; |
1da177e4 | 894 | int *action = context; |
4be44fcd | 895 | acpi_object_type type = 0; |
1da177e4 LT |
896 | |
897 | status = acpi_get_type(handle, &type); | |
898 | if (ACPI_FAILURE(status)) | |
4be44fcd | 899 | return (AE_OK); |
1da177e4 LT |
900 | |
901 | if (type != ACPI_TYPE_PROCESSOR) | |
4be44fcd | 902 | return (AE_OK); |
1da177e4 | 903 | |
4be44fcd | 904 | switch (*action) { |
1da177e4 LT |
905 | case INSTALL_NOTIFY_HANDLER: |
906 | acpi_install_notify_handler(handle, | |
4be44fcd LB |
907 | ACPI_SYSTEM_NOTIFY, |
908 | acpi_processor_hotplug_notify, | |
909 | NULL); | |
1da177e4 LT |
910 | break; |
911 | case UNINSTALL_NOTIFY_HANDLER: | |
912 | acpi_remove_notify_handler(handle, | |
4be44fcd LB |
913 | ACPI_SYSTEM_NOTIFY, |
914 | acpi_processor_hotplug_notify); | |
1da177e4 LT |
915 | break; |
916 | default: | |
917 | break; | |
918 | } | |
919 | ||
4be44fcd | 920 | return (AE_OK); |
1da177e4 LT |
921 | } |
922 | ||
4be44fcd | 923 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 | 924 | { |
1da177e4 LT |
925 | |
926 | if (!is_processor_present(handle)) { | |
d550d98d | 927 | return AE_ERROR; |
1da177e4 LT |
928 | } |
929 | ||
930 | if (acpi_map_lsapic(handle, p_cpu)) | |
d550d98d | 931 | return AE_ERROR; |
1da177e4 LT |
932 | |
933 | if (arch_register_cpu(*p_cpu)) { | |
934 | acpi_unmap_lsapic(*p_cpu); | |
d550d98d | 935 | return AE_ERROR; |
1da177e4 LT |
936 | } |
937 | ||
d550d98d | 938 | return AE_OK; |
1da177e4 LT |
939 | } |
940 | ||
4be44fcd | 941 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 LT |
942 | { |
943 | if (cpu_online(pr->id)) { | |
4be44fcd | 944 | return (-EINVAL); |
1da177e4 LT |
945 | } |
946 | arch_unregister_cpu(pr->id); | |
947 | acpi_unmap_lsapic(pr->id); | |
4be44fcd | 948 | return (0); |
1da177e4 LT |
949 | } |
950 | #else | |
4be44fcd | 951 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 LT |
952 | { |
953 | return AE_ERROR; | |
954 | } | |
4be44fcd | 955 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 | 956 | { |
4be44fcd | 957 | return (-EINVAL); |
1da177e4 LT |
958 | } |
959 | #endif | |
960 | ||
1da177e4 LT |
961 | static |
962 | void acpi_processor_install_hotplug_notify(void) | |
963 | { | |
964 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
965 | int action = INSTALL_NOTIFY_HANDLER; | |
966 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
967 | ACPI_ROOT_OBJECT, |
968 | ACPI_UINT32_MAX, | |
969 | processor_walk_namespace_cb, &action, NULL); | |
1da177e4 LT |
970 | #endif |
971 | } | |
972 | ||
1da177e4 LT |
973 | static |
974 | void acpi_processor_uninstall_hotplug_notify(void) | |
975 | { | |
976 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
977 | int action = UNINSTALL_NOTIFY_HANDLER; | |
978 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
979 | ACPI_ROOT_OBJECT, |
980 | ACPI_UINT32_MAX, | |
981 | processor_walk_namespace_cb, &action, NULL); | |
1da177e4 LT |
982 | #endif |
983 | } | |
984 | ||
985 | /* | |
986 | * We keep the driver loaded even when ACPI is not running. | |
987 | * This is needed for the powernow-k8 driver, that works even without | |
988 | * ACPI, but needs symbols from this driver | |
989 | */ | |
990 | ||
4be44fcd | 991 | static int __init acpi_processor_init(void) |
1da177e4 | 992 | { |
4be44fcd | 993 | int result = 0; |
1da177e4 | 994 | |
1da177e4 LT |
995 | |
996 | memset(&processors, 0, sizeof(processors)); | |
997 | memset(&errata, 0, sizeof(errata)); | |
998 | ||
f18c5a08 AS |
999 | #ifdef CONFIG_SMP |
1000 | if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0, | |
1001 | (struct acpi_table_header **)&madt))) | |
70c0846e | 1002 | madt = NULL; |
f18c5a08 AS |
1003 | #endif |
1004 | ||
1da177e4 LT |
1005 | acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
1006 | if (!acpi_processor_dir) | |
83822fc9 | 1007 | return -ENOMEM; |
1da177e4 LT |
1008 | acpi_processor_dir->owner = THIS_MODULE; |
1009 | ||
1010 | result = acpi_bus_register_driver(&acpi_processor_driver); | |
1011 | if (result < 0) { | |
1012 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); | |
83822fc9 | 1013 | return result; |
1da177e4 LT |
1014 | } |
1015 | ||
1016 | acpi_processor_install_hotplug_notify(); | |
1017 | ||
1018 | acpi_thermal_cpufreq_init(); | |
1019 | ||
1020 | acpi_processor_ppc_init(); | |
1021 | ||
d550d98d | 1022 | return 0; |
1da177e4 LT |
1023 | } |
1024 | ||
4be44fcd | 1025 | static void __exit acpi_processor_exit(void) |
1da177e4 | 1026 | { |
1da177e4 LT |
1027 | |
1028 | acpi_processor_ppc_exit(); | |
1029 | ||
1030 | acpi_thermal_cpufreq_exit(); | |
1031 | ||
1032 | acpi_processor_uninstall_hotplug_notify(); | |
1033 | ||
1034 | acpi_bus_unregister_driver(&acpi_processor_driver); | |
1035 | ||
1036 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); | |
1037 | ||
d550d98d | 1038 | return; |
1da177e4 LT |
1039 | } |
1040 | ||
1da177e4 LT |
1041 | module_init(acpi_processor_init); |
1042 | module_exit(acpi_processor_exit); | |
1043 | ||
1044 | EXPORT_SYMBOL(acpi_processor_set_thermal_limit); | |
1045 | ||
1046 | MODULE_ALIAS("processor"); |