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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 rev = 0; |
119 | u8 value1 = 0; | |
120 | u8 value2 = 0; | |
1da177e4 | 121 | |
1da177e4 LT |
122 | |
123 | if (!dev) | |
d550d98d | 124 | return -EINVAL; |
1da177e4 LT |
125 | |
126 | /* | |
127 | * Note that 'dev' references the PIIX4 ACPI Controller. | |
128 | */ | |
129 | ||
130 | pci_read_config_byte(dev, PCI_REVISION_ID, &rev); | |
131 | ||
132 | switch (rev) { | |
133 | case 0: | |
134 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n")); | |
135 | break; | |
136 | case 1: | |
137 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n")); | |
138 | break; | |
139 | case 2: | |
140 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n")); | |
141 | break; | |
142 | case 3: | |
143 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M\n")); | |
144 | break; | |
145 | default: | |
146 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4\n")); | |
147 | break; | |
148 | } | |
149 | ||
150 | switch (rev) { | |
151 | ||
152 | case 0: /* PIIX4 A-step */ | |
153 | case 1: /* PIIX4 B-step */ | |
154 | /* | |
155 | * See specification changes #13 ("Manual Throttle Duty Cycle") | |
156 | * and #14 ("Enabling and Disabling Manual Throttle"), plus | |
157 | * erratum #5 ("STPCLK# Deassertion Time") from the January | |
158 | * 2002 PIIX4 specification update. Applies to only older | |
159 | * PIIX4 models. | |
160 | */ | |
161 | errata.piix4.throttle = 1; | |
162 | ||
163 | case 2: /* PIIX4E */ | |
164 | case 3: /* PIIX4M */ | |
165 | /* | |
166 | * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA | |
167 | * Livelock") from the January 2002 PIIX4 specification update. | |
168 | * Applies to all PIIX4 models. | |
169 | */ | |
170 | ||
171 | /* | |
172 | * BM-IDE | |
173 | * ------ | |
174 | * Find the PIIX4 IDE Controller and get the Bus Master IDE | |
175 | * Status register address. We'll use this later to read | |
176 | * each IDE controller's DMA status to make sure we catch all | |
177 | * DMA activity. | |
178 | */ | |
179 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
180 | PCI_DEVICE_ID_INTEL_82371AB, |
181 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
182 | if (dev) { |
183 | errata.piix4.bmisx = pci_resource_start(dev, 4); | |
184 | pci_dev_put(dev); | |
185 | } | |
186 | ||
187 | /* | |
188 | * Type-F DMA | |
189 | * ---------- | |
190 | * Find the PIIX4 ISA Controller and read the Motherboard | |
191 | * DMA controller's status to see if Type-F (Fast) DMA mode | |
192 | * is enabled (bit 7) on either channel. Note that we'll | |
193 | * disable C3 support if this is enabled, as some legacy | |
194 | * devices won't operate well if fast DMA is disabled. | |
195 | */ | |
196 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
197 | PCI_DEVICE_ID_INTEL_82371AB_0, |
198 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
199 | if (dev) { |
200 | pci_read_config_byte(dev, 0x76, &value1); | |
201 | pci_read_config_byte(dev, 0x77, &value2); | |
202 | if ((value1 & 0x80) || (value2 & 0x80)) | |
203 | errata.piix4.fdma = 1; | |
204 | pci_dev_put(dev); | |
205 | } | |
206 | ||
207 | break; | |
208 | } | |
209 | ||
210 | if (errata.piix4.bmisx) | |
211 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 212 | "Bus master activity detection (BM-IDE) erratum enabled\n")); |
1da177e4 LT |
213 | if (errata.piix4.fdma) |
214 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 215 | "Type-F DMA livelock erratum (C3 disabled)\n")); |
1da177e4 | 216 | |
d550d98d | 217 | return 0; |
1da177e4 LT |
218 | } |
219 | ||
8713cbef | 220 | static int acpi_processor_errata(struct acpi_processor *pr) |
1da177e4 | 221 | { |
4be44fcd LB |
222 | int result = 0; |
223 | struct pci_dev *dev = NULL; | |
1da177e4 | 224 | |
1da177e4 LT |
225 | |
226 | if (!pr) | |
d550d98d | 227 | return -EINVAL; |
1da177e4 LT |
228 | |
229 | /* | |
230 | * PIIX4 | |
231 | */ | |
232 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
233 | PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID, |
234 | PCI_ANY_ID, NULL); | |
1da177e4 LT |
235 | if (dev) { |
236 | result = acpi_processor_errata_piix4(dev); | |
237 | pci_dev_put(dev); | |
238 | } | |
239 | ||
d550d98d | 240 | return result; |
1da177e4 LT |
241 | } |
242 | ||
02df8b93 | 243 | /* -------------------------------------------------------------------------- |
0b28002f | 244 | Common ACPI processor functions |
02df8b93 VP |
245 | -------------------------------------------------------------------------- */ |
246 | ||
247 | /* | |
248 | * _PDC is required for a BIOS-OS handshake for most of the newer | |
249 | * ACPI processor features. | |
250 | */ | |
05131ecc | 251 | static int acpi_processor_set_pdc(struct acpi_processor *pr) |
02df8b93 | 252 | { |
05131ecc | 253 | struct acpi_object_list *pdc_in = pr->pdc; |
4be44fcd | 254 | acpi_status status = AE_OK; |
02df8b93 | 255 | |
02df8b93 | 256 | |
05131ecc | 257 | if (!pdc_in) |
d550d98d | 258 | return status; |
02df8b93 | 259 | |
05131ecc | 260 | status = acpi_evaluate_object(pr->handle, "_PDC", pdc_in, NULL); |
02df8b93 | 261 | |
05131ecc | 262 | if (ACPI_FAILURE(status)) |
4be44fcd | 263 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
05131ecc | 264 | "Could not evaluate _PDC, using legacy perf. control...\n")); |
02df8b93 | 265 | |
d550d98d | 266 | return status; |
02df8b93 VP |
267 | } |
268 | ||
1da177e4 LT |
269 | /* -------------------------------------------------------------------------- |
270 | FS Interface (/proc) | |
271 | -------------------------------------------------------------------------- */ | |
272 | ||
4be44fcd | 273 | static struct proc_dir_entry *acpi_processor_dir = NULL; |
1da177e4 LT |
274 | |
275 | static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset) | |
276 | { | |
50dd0969 | 277 | struct acpi_processor *pr = seq->private; |
1da177e4 | 278 | |
1da177e4 LT |
279 | |
280 | if (!pr) | |
281 | goto end; | |
282 | ||
283 | seq_printf(seq, "processor id: %d\n" | |
4be44fcd LB |
284 | "acpi id: %d\n" |
285 | "bus mastering control: %s\n" | |
286 | "power management: %s\n" | |
287 | "throttling control: %s\n" | |
288 | "limit interface: %s\n", | |
289 | pr->id, | |
290 | pr->acpi_id, | |
291 | pr->flags.bm_control ? "yes" : "no", | |
292 | pr->flags.power ? "yes" : "no", | |
293 | pr->flags.throttling ? "yes" : "no", | |
294 | pr->flags.limit ? "yes" : "no"); | |
295 | ||
296 | end: | |
d550d98d | 297 | return 0; |
1da177e4 LT |
298 | } |
299 | ||
300 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file) | |
301 | { | |
302 | return single_open(file, acpi_processor_info_seq_show, | |
4be44fcd | 303 | PDE(inode)->data); |
1da177e4 LT |
304 | } |
305 | ||
4be44fcd | 306 | static int acpi_processor_add_fs(struct acpi_device *device) |
1da177e4 | 307 | { |
4be44fcd | 308 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 309 | |
1da177e4 LT |
310 | |
311 | if (!acpi_device_dir(device)) { | |
312 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 313 | acpi_processor_dir); |
1da177e4 | 314 | if (!acpi_device_dir(device)) |
d550d98d | 315 | return -ENODEV; |
1da177e4 LT |
316 | } |
317 | acpi_device_dir(device)->owner = THIS_MODULE; | |
318 | ||
319 | /* 'info' [R] */ | |
320 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_INFO, | |
4be44fcd | 321 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 322 | if (!entry) |
d550d98d | 323 | return -EIO; |
1da177e4 LT |
324 | else { |
325 | entry->proc_fops = &acpi_processor_info_fops; | |
326 | entry->data = acpi_driver_data(device); | |
327 | entry->owner = THIS_MODULE; | |
328 | } | |
329 | ||
330 | /* 'throttling' [R/W] */ | |
331 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, | |
4be44fcd LB |
332 | S_IFREG | S_IRUGO | S_IWUSR, |
333 | acpi_device_dir(device)); | |
1da177e4 | 334 | if (!entry) |
d550d98d | 335 | return -EIO; |
1da177e4 LT |
336 | else { |
337 | entry->proc_fops = &acpi_processor_throttling_fops; | |
1da177e4 LT |
338 | entry->data = acpi_driver_data(device); |
339 | entry->owner = THIS_MODULE; | |
340 | } | |
341 | ||
342 | /* 'limit' [R/W] */ | |
343 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, | |
4be44fcd LB |
344 | S_IFREG | S_IRUGO | S_IWUSR, |
345 | acpi_device_dir(device)); | |
1da177e4 | 346 | if (!entry) |
d550d98d | 347 | return -EIO; |
1da177e4 LT |
348 | else { |
349 | entry->proc_fops = &acpi_processor_limit_fops; | |
1da177e4 LT |
350 | entry->data = acpi_driver_data(device); |
351 | entry->owner = THIS_MODULE; | |
352 | } | |
353 | ||
d550d98d | 354 | return 0; |
1da177e4 LT |
355 | } |
356 | ||
4be44fcd | 357 | static int acpi_processor_remove_fs(struct acpi_device *device) |
1da177e4 | 358 | { |
1da177e4 LT |
359 | |
360 | if (acpi_device_dir(device)) { | |
4be44fcd LB |
361 | remove_proc_entry(ACPI_PROCESSOR_FILE_INFO, |
362 | acpi_device_dir(device)); | |
1da177e4 | 363 | remove_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, |
4be44fcd LB |
364 | acpi_device_dir(device)); |
365 | remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, | |
366 | acpi_device_dir(device)); | |
1da177e4 LT |
367 | remove_proc_entry(acpi_device_bid(device), acpi_processor_dir); |
368 | acpi_device_dir(device) = NULL; | |
369 | } | |
370 | ||
d550d98d | 371 | return 0; |
1da177e4 LT |
372 | } |
373 | ||
374 | /* Use the acpiid in MADT to map cpus in case of SMP */ | |
f18c5a08 | 375 | |
1da177e4 | 376 | #ifndef CONFIG_SMP |
11bf04c4 | 377 | static int get_cpu_id(acpi_handle handle, u32 acpi_id) {return -1;} |
1da177e4 LT |
378 | #else |
379 | ||
f18c5a08 AS |
380 | static struct acpi_table_madt *madt; |
381 | ||
382 | static int map_lapic_id(struct acpi_subtable_header *entry, | |
383 | u32 acpi_id, int *apic_id) | |
384 | { | |
385 | struct acpi_madt_local_apic *lapic = | |
386 | (struct acpi_madt_local_apic *)entry; | |
387 | if ((lapic->lapic_flags & ACPI_MADT_ENABLED) && | |
388 | lapic->processor_id == acpi_id) { | |
389 | *apic_id = lapic->id; | |
390 | return 1; | |
391 | } | |
392 | return 0; | |
393 | } | |
394 | ||
395 | static int map_lsapic_id(struct acpi_subtable_header *entry, | |
396 | u32 acpi_id, int *apic_id) | |
397 | { | |
398 | struct acpi_madt_local_sapic *lsapic = | |
399 | (struct acpi_madt_local_sapic *)entry; | |
400 | /* Only check enabled APICs*/ | |
401 | if (lsapic->lapic_flags & ACPI_MADT_ENABLED) { | |
402 | /* First check against id */ | |
403 | if (lsapic->processor_id == acpi_id) { | |
615d5f23 | 404 | *apic_id = (lsapic->id << 8) | lsapic->eid; |
f18c5a08 AS |
405 | return 1; |
406 | /* Check against optional uid */ | |
407 | } else if (entry->length >= 16 && | |
408 | lsapic->uid == acpi_id) { | |
409 | *apic_id = lsapic->uid; | |
410 | return 1; | |
411 | } | |
412 | } | |
413 | return 0; | |
414 | } | |
415 | ||
1da177e4 | 416 | #ifdef CONFIG_IA64 |
1da177e4 | 417 | #define arch_cpu_to_apicid ia64_cpu_to_sapicid |
1da177e4 | 418 | #else |
1da177e4 | 419 | #define arch_cpu_to_apicid x86_cpu_to_apicid |
1da177e4 LT |
420 | #endif |
421 | ||
f18c5a08 AS |
422 | static int map_madt_entry(u32 acpi_id) |
423 | { | |
424 | unsigned long madt_end, entry; | |
425 | int apic_id = -1; | |
426 | ||
427 | if (!madt) | |
428 | return apic_id; | |
429 | ||
430 | entry = (unsigned long)madt; | |
431 | madt_end = entry + madt->header.length; | |
432 | ||
433 | /* Parse all entries looking for a match. */ | |
434 | ||
435 | entry += sizeof(struct acpi_table_madt); | |
436 | while (entry + sizeof(struct acpi_subtable_header) < madt_end) { | |
437 | struct acpi_subtable_header *header = | |
438 | (struct acpi_subtable_header *)entry; | |
439 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { | |
440 | if (map_lapic_id(header, acpi_id, &apic_id)) | |
441 | break; | |
442 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { | |
443 | if (map_lsapic_id(header, acpi_id, &apic_id)) | |
444 | break; | |
445 | } | |
446 | entry += header->length; | |
447 | } | |
448 | return apic_id; | |
449 | } | |
450 | ||
451 | static int map_mat_entry(acpi_handle handle, u32 acpi_id) | |
452 | { | |
453 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
454 | union acpi_object *obj; | |
455 | struct acpi_subtable_header *header; | |
456 | int apic_id = -1; | |
457 | ||
458 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) | |
459 | goto exit; | |
460 | ||
461 | if (!buffer.length || !buffer.pointer) | |
462 | goto exit; | |
463 | ||
464 | obj = buffer.pointer; | |
465 | if (obj->type != ACPI_TYPE_BUFFER || | |
466 | obj->buffer.length < sizeof(struct acpi_subtable_header)) { | |
467 | goto exit; | |
468 | } | |
469 | ||
470 | header = (struct acpi_subtable_header *)obj->buffer.pointer; | |
471 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { | |
472 | map_lapic_id(header, acpi_id, &apic_id); | |
473 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { | |
474 | map_lsapic_id(header, acpi_id, &apic_id); | |
475 | } | |
476 | ||
477 | exit: | |
478 | if (buffer.pointer) | |
479 | kfree(buffer.pointer); | |
480 | return apic_id; | |
481 | } | |
482 | ||
11bf04c4 | 483 | static int get_cpu_id(acpi_handle handle, u32 acpi_id) |
1da177e4 | 484 | { |
4a35a46b | 485 | int i; |
f18c5a08 | 486 | int apic_id = -1; |
1da177e4 | 487 | |
f18c5a08 AS |
488 | apic_id = map_mat_entry(handle, acpi_id); |
489 | if (apic_id == -1) | |
490 | apic_id = map_madt_entry(acpi_id); | |
491 | if (apic_id == -1) | |
492 | return apic_id; | |
1da177e4 | 493 | |
f18c5a08 | 494 | for (i = 0; i < NR_CPUS; ++i) { |
4a35a46b LB |
495 | if (arch_cpu_to_apicid[i] == apic_id) |
496 | return i; | |
1da177e4 LT |
497 | } |
498 | return -1; | |
499 | } | |
500 | #endif | |
501 | ||
502 | /* -------------------------------------------------------------------------- | |
503 | Driver Interface | |
504 | -------------------------------------------------------------------------- */ | |
505 | ||
11bf04c4 | 506 | static int acpi_processor_get_info(struct acpi_processor *pr, unsigned has_uid) |
1da177e4 | 507 | { |
4be44fcd LB |
508 | acpi_status status = 0; |
509 | union acpi_object object = { 0 }; | |
510 | struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; | |
df42baa0 | 511 | int cpu_index; |
4be44fcd | 512 | static int cpu0_initialized; |
1da177e4 | 513 | |
1da177e4 LT |
514 | |
515 | if (!pr) | |
d550d98d | 516 | return -EINVAL; |
1da177e4 LT |
517 | |
518 | if (num_online_cpus() > 1) | |
519 | errata.smp = TRUE; | |
520 | ||
521 | acpi_processor_errata(pr); | |
522 | ||
523 | /* | |
524 | * Check to see if we have bus mastering arbitration control. This | |
525 | * is required for proper C3 usage (to maintain cache coherency). | |
526 | */ | |
cee324b1 | 527 | if (acpi_gbl_FADT.pm2_control_block && acpi_gbl_FADT.pm2_control_length) { |
1da177e4 LT |
528 | pr->flags.bm_control = 1; |
529 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd LB |
530 | "Bus mastering arbitration control present\n")); |
531 | } else | |
1da177e4 | 532 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
4be44fcd | 533 | "No bus mastering arbitration control\n")); |
1da177e4 | 534 | |
11bf04c4 AS |
535 | /* Check if it is a Device with HID and UID */ |
536 | if (has_uid) { | |
537 | unsigned long value; | |
538 | status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID, | |
539 | NULL, &value); | |
540 | if (ACPI_FAILURE(status)) { | |
541 | printk(KERN_ERR PREFIX "Evaluating processor _UID\n"); | |
542 | return -ENODEV; | |
543 | } | |
544 | pr->acpi_id = value; | |
545 | } else { | |
546 | /* | |
547 | * Evalute the processor object. Note that it is common on SMP to | |
548 | * have the first (boot) processor with a valid PBLK address while | |
549 | * all others have a NULL address. | |
550 | */ | |
551 | status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); | |
552 | if (ACPI_FAILURE(status)) { | |
553 | printk(KERN_ERR PREFIX "Evaluating processor object\n"); | |
554 | return -ENODEV; | |
555 | } | |
1da177e4 | 556 | |
11bf04c4 AS |
557 | /* |
558 | * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. | |
559 | * >>> 'acpi_get_processor_id(acpi_id, &id)' in arch/xxx/acpi.c | |
560 | */ | |
561 | pr->acpi_id = object.processor.proc_id; | |
562 | } | |
563 | cpu_index = get_cpu_id(pr->handle, pr->acpi_id); | |
1da177e4 | 564 | |
4be44fcd | 565 | /* Handle UP system running SMP kernel, with no LAPIC in MADT */ |
df42baa0 | 566 | if (!cpu0_initialized && (cpu_index == -1) && |
4be44fcd LB |
567 | (num_online_cpus() == 1)) { |
568 | cpu_index = 0; | |
569 | } | |
570 | ||
571 | cpu0_initialized = 1; | |
572 | ||
573 | pr->id = cpu_index; | |
574 | ||
575 | /* | |
576 | * Extra Processor objects may be enumerated on MP systems with | |
577 | * less than the max # of CPUs. They should be ignored _iff | |
578 | * they are physically not present. | |
579 | */ | |
f18c5a08 | 580 | if (pr->id == -1) { |
4be44fcd LB |
581 | if (ACPI_FAILURE |
582 | (acpi_processor_hotadd_init(pr->handle, &pr->id))) { | |
d550d98d | 583 | return -ENODEV; |
4be44fcd LB |
584 | } |
585 | } | |
1da177e4 LT |
586 | |
587 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, | |
4be44fcd | 588 | pr->acpi_id)); |
1da177e4 LT |
589 | |
590 | if (!object.processor.pblk_address) | |
591 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n")); | |
592 | else if (object.processor.pblk_length != 6) | |
6468463a LB |
593 | printk(KERN_ERR PREFIX "Invalid PBLK length [%d]\n", |
594 | object.processor.pblk_length); | |
1da177e4 LT |
595 | else { |
596 | pr->throttling.address = object.processor.pblk_address; | |
cee324b1 AS |
597 | pr->throttling.duty_offset = acpi_gbl_FADT.duty_offset; |
598 | pr->throttling.duty_width = acpi_gbl_FADT.duty_width; | |
1da177e4 LT |
599 | |
600 | pr->pblk = object.processor.pblk_address; | |
601 | ||
602 | /* | |
603 | * We don't care about error returns - we just try to mark | |
604 | * these reserved so that nobody else is confused into thinking | |
605 | * that this region might be unused.. | |
606 | * | |
607 | * (In particular, allocating the IO range for Cardbus) | |
608 | */ | |
609 | request_region(pr->throttling.address, 6, "ACPI CPU throttle"); | |
610 | } | |
611 | ||
612 | #ifdef CONFIG_CPU_FREQ | |
613 | acpi_processor_ppc_has_changed(pr); | |
614 | #endif | |
615 | acpi_processor_get_throttling_info(pr); | |
616 | acpi_processor_get_limit_info(pr); | |
617 | ||
d550d98d | 618 | return 0; |
1da177e4 LT |
619 | } |
620 | ||
cd8e2b48 VP |
621 | static void *processor_device_array[NR_CPUS]; |
622 | ||
7af8b660 | 623 | static int __cpuinit acpi_processor_start(struct acpi_device *device) |
1da177e4 | 624 | { |
4be44fcd LB |
625 | int result = 0; |
626 | acpi_status status = AE_OK; | |
627 | struct acpi_processor *pr; | |
1da177e4 | 628 | |
1da177e4 LT |
629 | |
630 | pr = acpi_driver_data(device); | |
631 | ||
11bf04c4 | 632 | result = acpi_processor_get_info(pr, device->flags.unique_id); |
1da177e4 LT |
633 | if (result) { |
634 | /* Processor is physically not present */ | |
d550d98d | 635 | return 0; |
1da177e4 LT |
636 | } |
637 | ||
638 | BUG_ON((pr->id >= NR_CPUS) || (pr->id < 0)); | |
639 | ||
cd8e2b48 VP |
640 | /* |
641 | * Buggy BIOS check | |
642 | * ACPI id of processors can be reported wrongly by the BIOS. | |
643 | * Don't trust it blindly | |
644 | */ | |
645 | if (processor_device_array[pr->id] != NULL && | |
50dd0969 | 646 | processor_device_array[pr->id] != device) { |
0eacee58 LB |
647 | printk(KERN_WARNING "BIOS reported wrong ACPI id" |
648 | "for the processor\n"); | |
d550d98d | 649 | return -ENODEV; |
cd8e2b48 | 650 | } |
50dd0969 | 651 | processor_device_array[pr->id] = device; |
cd8e2b48 | 652 | |
1da177e4 LT |
653 | processors[pr->id] = pr; |
654 | ||
655 | result = acpi_processor_add_fs(device); | |
656 | if (result) | |
657 | goto end; | |
658 | ||
659 | status = acpi_install_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, | |
4be44fcd | 660 | acpi_processor_notify, pr); |
1da177e4 | 661 | |
05131ecc VP |
662 | /* _PDC call should be done before doing anything else (if reqd.). */ |
663 | arch_acpi_processor_init_pdc(pr); | |
664 | acpi_processor_set_pdc(pr); | |
665 | ||
1da177e4 LT |
666 | acpi_processor_power_init(pr, device); |
667 | ||
668 | if (pr->flags.throttling) { | |
669 | printk(KERN_INFO PREFIX "%s [%s] (supports", | |
4be44fcd | 670 | acpi_device_name(device), acpi_device_bid(device)); |
1da177e4 LT |
671 | printk(" %d throttling states", pr->throttling.state_count); |
672 | printk(")\n"); | |
673 | } | |
674 | ||
4be44fcd | 675 | end: |
1da177e4 | 676 | |
d550d98d | 677 | return result; |
1da177e4 LT |
678 | } |
679 | ||
4be44fcd | 680 | static void acpi_processor_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 681 | { |
50dd0969 | 682 | struct acpi_processor *pr = data; |
4be44fcd | 683 | struct acpi_device *device = NULL; |
1da177e4 | 684 | |
1da177e4 LT |
685 | |
686 | if (!pr) | |
d550d98d | 687 | return; |
1da177e4 LT |
688 | |
689 | if (acpi_bus_get_device(pr->handle, &device)) | |
d550d98d | 690 | return; |
1da177e4 LT |
691 | |
692 | switch (event) { | |
693 | case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: | |
694 | acpi_processor_ppc_has_changed(pr); | |
695 | acpi_bus_generate_event(device, event, | |
4be44fcd | 696 | pr->performance_platform_limit); |
1da177e4 LT |
697 | break; |
698 | case ACPI_PROCESSOR_NOTIFY_POWER: | |
699 | acpi_processor_cst_has_changed(pr); | |
700 | acpi_bus_generate_event(device, event, 0); | |
701 | break; | |
702 | default: | |
703 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 704 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
705 | break; |
706 | } | |
707 | ||
d550d98d | 708 | return; |
1da177e4 LT |
709 | } |
710 | ||
4be44fcd | 711 | static int acpi_processor_add(struct acpi_device *device) |
1da177e4 | 712 | { |
4be44fcd | 713 | struct acpi_processor *pr = NULL; |
1da177e4 | 714 | |
1da177e4 LT |
715 | |
716 | if (!device) | |
d550d98d | 717 | return -EINVAL; |
1da177e4 | 718 | |
36bcbec7 | 719 | pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL); |
1da177e4 | 720 | if (!pr) |
d550d98d | 721 | return -ENOMEM; |
1da177e4 LT |
722 | |
723 | pr->handle = device->handle; | |
724 | strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); | |
725 | strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); | |
726 | acpi_driver_data(device) = pr; | |
727 | ||
d550d98d | 728 | return 0; |
1da177e4 LT |
729 | } |
730 | ||
4be44fcd | 731 | static int acpi_processor_remove(struct acpi_device *device, int type) |
1da177e4 | 732 | { |
4be44fcd LB |
733 | acpi_status status = AE_OK; |
734 | struct acpi_processor *pr = NULL; | |
1da177e4 | 735 | |
1da177e4 LT |
736 | |
737 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 738 | return -EINVAL; |
1da177e4 | 739 | |
50dd0969 | 740 | pr = acpi_driver_data(device); |
1da177e4 LT |
741 | |
742 | if (pr->id >= NR_CPUS) { | |
743 | kfree(pr); | |
d550d98d | 744 | return 0; |
1da177e4 LT |
745 | } |
746 | ||
747 | if (type == ACPI_BUS_REMOVAL_EJECT) { | |
748 | if (acpi_processor_handle_eject(pr)) | |
d550d98d | 749 | return -EINVAL; |
1da177e4 LT |
750 | } |
751 | ||
752 | acpi_processor_power_exit(pr, device); | |
753 | ||
754 | status = acpi_remove_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, | |
4be44fcd | 755 | acpi_processor_notify); |
1da177e4 LT |
756 | |
757 | acpi_processor_remove_fs(device); | |
758 | ||
759 | processors[pr->id] = NULL; | |
760 | ||
761 | kfree(pr); | |
762 | ||
d550d98d | 763 | return 0; |
1da177e4 LT |
764 | } |
765 | ||
766 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
767 | /**************************************************************************** | |
768 | * Acpi processor hotplug support * | |
769 | ****************************************************************************/ | |
770 | ||
771 | static int is_processor_present(acpi_handle handle); | |
772 | ||
4be44fcd | 773 | static int is_processor_present(acpi_handle handle) |
1da177e4 | 774 | { |
4be44fcd LB |
775 | acpi_status status; |
776 | unsigned long sta = 0; | |
1da177e4 | 777 | |
1da177e4 LT |
778 | |
779 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
a0bd4ac4 | 780 | if (ACPI_FAILURE(status) || !(sta & ACPI_STA_DEVICE_PRESENT)) { |
a6fc6720 | 781 | ACPI_EXCEPTION((AE_INFO, status, "Processor Device is not present")); |
d550d98d | 782 | return 0; |
1da177e4 | 783 | } |
d550d98d | 784 | return 1; |
1da177e4 LT |
785 | } |
786 | ||
1da177e4 | 787 | static |
4be44fcd | 788 | int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 789 | { |
4be44fcd LB |
790 | acpi_handle phandle; |
791 | struct acpi_device *pdev; | |
792 | struct acpi_processor *pr; | |
1da177e4 | 793 | |
1da177e4 LT |
794 | |
795 | if (acpi_get_parent(handle, &phandle)) { | |
d550d98d | 796 | return -ENODEV; |
1da177e4 LT |
797 | } |
798 | ||
799 | if (acpi_bus_get_device(phandle, &pdev)) { | |
d550d98d | 800 | return -ENODEV; |
1da177e4 LT |
801 | } |
802 | ||
803 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { | |
d550d98d | 804 | return -ENODEV; |
1da177e4 LT |
805 | } |
806 | ||
3fb02738 | 807 | acpi_bus_start(*device); |
1da177e4 LT |
808 | |
809 | pr = acpi_driver_data(*device); | |
810 | if (!pr) | |
d550d98d | 811 | return -ENODEV; |
1da177e4 | 812 | |
4be44fcd | 813 | if ((pr->id >= 0) && (pr->id < NR_CPUS)) { |
f883d9db | 814 | kobject_uevent(&(*device)->dev.kobj, KOBJ_ONLINE); |
1da177e4 | 815 | } |
d550d98d | 816 | return 0; |
1da177e4 LT |
817 | } |
818 | ||
1da177e4 | 819 | static void |
4be44fcd | 820 | acpi_processor_hotplug_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 821 | { |
4be44fcd LB |
822 | struct acpi_processor *pr; |
823 | struct acpi_device *device = NULL; | |
1da177e4 LT |
824 | int result; |
825 | ||
1da177e4 LT |
826 | |
827 | switch (event) { | |
828 | case ACPI_NOTIFY_BUS_CHECK: | |
829 | case ACPI_NOTIFY_DEVICE_CHECK: | |
830 | printk("Processor driver received %s event\n", | |
4be44fcd LB |
831 | (event == ACPI_NOTIFY_BUS_CHECK) ? |
832 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK"); | |
1da177e4 LT |
833 | |
834 | if (!is_processor_present(handle)) | |
835 | break; | |
836 | ||
837 | if (acpi_bus_get_device(handle, &device)) { | |
838 | result = acpi_processor_device_add(handle, &device); | |
839 | if (result) | |
6468463a LB |
840 | printk(KERN_ERR PREFIX |
841 | "Unable to add the device\n"); | |
1da177e4 LT |
842 | break; |
843 | } | |
844 | ||
845 | pr = acpi_driver_data(device); | |
846 | if (!pr) { | |
6468463a | 847 | printk(KERN_ERR PREFIX "Driver data is NULL\n"); |
1da177e4 LT |
848 | break; |
849 | } | |
850 | ||
851 | if (pr->id >= 0 && (pr->id < NR_CPUS)) { | |
f883d9db | 852 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
1da177e4 LT |
853 | break; |
854 | } | |
855 | ||
856 | result = acpi_processor_start(device); | |
4be44fcd | 857 | if ((!result) && ((pr->id >= 0) && (pr->id < NR_CPUS))) { |
f883d9db | 858 | kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); |
1da177e4 | 859 | } else { |
6468463a LB |
860 | printk(KERN_ERR PREFIX "Device [%s] failed to start\n", |
861 | acpi_device_bid(device)); | |
1da177e4 | 862 | } |
4be44fcd | 863 | break; |
1da177e4 | 864 | case ACPI_NOTIFY_EJECT_REQUEST: |
4be44fcd LB |
865 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
866 | "received ACPI_NOTIFY_EJECT_REQUEST\n")); | |
1da177e4 LT |
867 | |
868 | if (acpi_bus_get_device(handle, &device)) { | |
6468463a LB |
869 | printk(KERN_ERR PREFIX |
870 | "Device don't exist, dropping EJECT\n"); | |
1da177e4 LT |
871 | break; |
872 | } | |
873 | pr = acpi_driver_data(device); | |
874 | if (!pr) { | |
6468463a LB |
875 | printk(KERN_ERR PREFIX |
876 | "Driver data is NULL, dropping EJECT\n"); | |
d550d98d | 877 | return; |
1da177e4 LT |
878 | } |
879 | ||
880 | if ((pr->id < NR_CPUS) && (cpu_present(pr->id))) | |
f883d9db | 881 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
1da177e4 LT |
882 | break; |
883 | default: | |
884 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 885 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
886 | break; |
887 | } | |
888 | ||
d550d98d | 889 | return; |
1da177e4 LT |
890 | } |
891 | ||
892 | static acpi_status | |
893 | processor_walk_namespace_cb(acpi_handle handle, | |
4be44fcd | 894 | u32 lvl, void *context, void **rv) |
1da177e4 | 895 | { |
4be44fcd | 896 | acpi_status status; |
1da177e4 | 897 | int *action = context; |
4be44fcd | 898 | acpi_object_type type = 0; |
1da177e4 LT |
899 | |
900 | status = acpi_get_type(handle, &type); | |
901 | if (ACPI_FAILURE(status)) | |
4be44fcd | 902 | return (AE_OK); |
1da177e4 LT |
903 | |
904 | if (type != ACPI_TYPE_PROCESSOR) | |
4be44fcd | 905 | return (AE_OK); |
1da177e4 | 906 | |
4be44fcd | 907 | switch (*action) { |
1da177e4 LT |
908 | case INSTALL_NOTIFY_HANDLER: |
909 | acpi_install_notify_handler(handle, | |
4be44fcd LB |
910 | ACPI_SYSTEM_NOTIFY, |
911 | acpi_processor_hotplug_notify, | |
912 | NULL); | |
1da177e4 LT |
913 | break; |
914 | case UNINSTALL_NOTIFY_HANDLER: | |
915 | acpi_remove_notify_handler(handle, | |
4be44fcd LB |
916 | ACPI_SYSTEM_NOTIFY, |
917 | acpi_processor_hotplug_notify); | |
1da177e4 LT |
918 | break; |
919 | default: | |
920 | break; | |
921 | } | |
922 | ||
4be44fcd | 923 | return (AE_OK); |
1da177e4 LT |
924 | } |
925 | ||
4be44fcd | 926 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 | 927 | { |
1da177e4 LT |
928 | |
929 | if (!is_processor_present(handle)) { | |
d550d98d | 930 | return AE_ERROR; |
1da177e4 LT |
931 | } |
932 | ||
933 | if (acpi_map_lsapic(handle, p_cpu)) | |
d550d98d | 934 | return AE_ERROR; |
1da177e4 LT |
935 | |
936 | if (arch_register_cpu(*p_cpu)) { | |
937 | acpi_unmap_lsapic(*p_cpu); | |
d550d98d | 938 | return AE_ERROR; |
1da177e4 LT |
939 | } |
940 | ||
d550d98d | 941 | return AE_OK; |
1da177e4 LT |
942 | } |
943 | ||
4be44fcd | 944 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 LT |
945 | { |
946 | if (cpu_online(pr->id)) { | |
4be44fcd | 947 | return (-EINVAL); |
1da177e4 LT |
948 | } |
949 | arch_unregister_cpu(pr->id); | |
950 | acpi_unmap_lsapic(pr->id); | |
4be44fcd | 951 | return (0); |
1da177e4 LT |
952 | } |
953 | #else | |
4be44fcd | 954 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 LT |
955 | { |
956 | return AE_ERROR; | |
957 | } | |
4be44fcd | 958 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 | 959 | { |
4be44fcd | 960 | return (-EINVAL); |
1da177e4 LT |
961 | } |
962 | #endif | |
963 | ||
1da177e4 LT |
964 | static |
965 | void acpi_processor_install_hotplug_notify(void) | |
966 | { | |
967 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
968 | int action = INSTALL_NOTIFY_HANDLER; | |
969 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
970 | ACPI_ROOT_OBJECT, |
971 | ACPI_UINT32_MAX, | |
972 | processor_walk_namespace_cb, &action, NULL); | |
1da177e4 LT |
973 | #endif |
974 | } | |
975 | ||
1da177e4 LT |
976 | static |
977 | void acpi_processor_uninstall_hotplug_notify(void) | |
978 | { | |
979 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
980 | int action = UNINSTALL_NOTIFY_HANDLER; | |
981 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
982 | ACPI_ROOT_OBJECT, |
983 | ACPI_UINT32_MAX, | |
984 | processor_walk_namespace_cb, &action, NULL); | |
1da177e4 LT |
985 | #endif |
986 | } | |
987 | ||
988 | /* | |
989 | * We keep the driver loaded even when ACPI is not running. | |
990 | * This is needed for the powernow-k8 driver, that works even without | |
991 | * ACPI, but needs symbols from this driver | |
992 | */ | |
993 | ||
4be44fcd | 994 | static int __init acpi_processor_init(void) |
1da177e4 | 995 | { |
4be44fcd | 996 | int result = 0; |
1da177e4 | 997 | |
1da177e4 LT |
998 | |
999 | memset(&processors, 0, sizeof(processors)); | |
1000 | memset(&errata, 0, sizeof(errata)); | |
1001 | ||
f18c5a08 AS |
1002 | #ifdef CONFIG_SMP |
1003 | if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0, | |
1004 | (struct acpi_table_header **)&madt))) | |
70c0846e | 1005 | madt = NULL; |
f18c5a08 AS |
1006 | #endif |
1007 | ||
1da177e4 LT |
1008 | acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
1009 | if (!acpi_processor_dir) | |
83822fc9 | 1010 | return -ENOMEM; |
1da177e4 LT |
1011 | acpi_processor_dir->owner = THIS_MODULE; |
1012 | ||
1013 | result = acpi_bus_register_driver(&acpi_processor_driver); | |
1014 | if (result < 0) { | |
1015 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); | |
83822fc9 | 1016 | return result; |
1da177e4 LT |
1017 | } |
1018 | ||
1019 | acpi_processor_install_hotplug_notify(); | |
1020 | ||
1021 | acpi_thermal_cpufreq_init(); | |
1022 | ||
1023 | acpi_processor_ppc_init(); | |
1024 | ||
d550d98d | 1025 | return 0; |
1da177e4 LT |
1026 | } |
1027 | ||
4be44fcd | 1028 | static void __exit acpi_processor_exit(void) |
1da177e4 | 1029 | { |
1da177e4 LT |
1030 | |
1031 | acpi_processor_ppc_exit(); | |
1032 | ||
1033 | acpi_thermal_cpufreq_exit(); | |
1034 | ||
1035 | acpi_processor_uninstall_hotplug_notify(); | |
1036 | ||
1037 | acpi_bus_unregister_driver(&acpi_processor_driver); | |
1038 | ||
1039 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); | |
1040 | ||
d550d98d | 1041 | return; |
1da177e4 LT |
1042 | } |
1043 | ||
1da177e4 LT |
1044 | module_init(acpi_processor_init); |
1045 | module_exit(acpi_processor_exit); | |
1046 | ||
1047 | EXPORT_SYMBOL(acpi_processor_set_thermal_limit); | |
1048 | ||
1049 | MODULE_ALIAS("processor"); |