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 | |
01854e69 | 69 | #define ACPI_PROCESSOR_NOTIFY_THROTTLING 0x82 |
1da177e4 LT |
70 | |
71 | #define ACPI_PROCESSOR_LIMIT_USER 0 | |
72 | #define ACPI_PROCESSOR_LIMIT_THERMAL 1 | |
73 | ||
1da177e4 | 74 | #define _COMPONENT ACPI_PROCESSOR_COMPONENT |
f52fd66d | 75 | ACPI_MODULE_NAME("processor_core"); |
1da177e4 | 76 | |
f52fd66d | 77 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 78 | MODULE_DESCRIPTION("ACPI Processor Driver"); |
1da177e4 LT |
79 | MODULE_LICENSE("GPL"); |
80 | ||
4be44fcd LB |
81 | static int acpi_processor_add(struct acpi_device *device); |
82 | static int acpi_processor_start(struct acpi_device *device); | |
83 | static int acpi_processor_remove(struct acpi_device *device, int type); | |
1da177e4 | 84 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file); |
4be44fcd | 85 | static void acpi_processor_notify(acpi_handle handle, u32 event, void *data); |
1da177e4 LT |
86 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu); |
87 | static int acpi_processor_handle_eject(struct acpi_processor *pr); | |
01854e69 LY |
88 | extern int acpi_processor_tstate_has_changed(struct acpi_processor *pr); |
89 | ||
1da177e4 | 90 | |
1ba90e3a TR |
91 | static const struct acpi_device_id processor_device_ids[] = { |
92 | {ACPI_PROCESSOR_HID, 0}, | |
93 | {"", 0}, | |
94 | }; | |
95 | MODULE_DEVICE_TABLE(acpi, processor_device_ids); | |
96 | ||
1da177e4 | 97 | static struct acpi_driver acpi_processor_driver = { |
c2b6705b | 98 | .name = "processor", |
4be44fcd | 99 | .class = ACPI_PROCESSOR_CLASS, |
1ba90e3a | 100 | .ids = processor_device_ids, |
4be44fcd LB |
101 | .ops = { |
102 | .add = acpi_processor_add, | |
103 | .remove = acpi_processor_remove, | |
104 | .start = acpi_processor_start, | |
105 | }, | |
1da177e4 LT |
106 | }; |
107 | ||
108 | #define INSTALL_NOTIFY_HANDLER 1 | |
109 | #define UNINSTALL_NOTIFY_HANDLER 2 | |
110 | ||
d7508032 | 111 | static const struct file_operations acpi_processor_info_fops = { |
4be44fcd LB |
112 | .open = acpi_processor_info_open_fs, |
113 | .read = seq_read, | |
114 | .llseek = seq_lseek, | |
115 | .release = single_release, | |
1da177e4 LT |
116 | }; |
117 | ||
4be44fcd | 118 | struct acpi_processor *processors[NR_CPUS]; |
9f222718 | 119 | struct acpi_processor_errata errata __read_mostly; |
1da177e4 | 120 | |
1da177e4 LT |
121 | /* -------------------------------------------------------------------------- |
122 | Errata Handling | |
123 | -------------------------------------------------------------------------- */ | |
124 | ||
4be44fcd | 125 | static int acpi_processor_errata_piix4(struct pci_dev *dev) |
1da177e4 | 126 | { |
4be44fcd LB |
127 | u8 value1 = 0; |
128 | u8 value2 = 0; | |
1da177e4 | 129 | |
1da177e4 LT |
130 | |
131 | if (!dev) | |
d550d98d | 132 | return -EINVAL; |
1da177e4 LT |
133 | |
134 | /* | |
135 | * Note that 'dev' references the PIIX4 ACPI Controller. | |
136 | */ | |
137 | ||
44c10138 | 138 | switch (dev->revision) { |
1da177e4 LT |
139 | case 0: |
140 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n")); | |
141 | break; | |
142 | case 1: | |
143 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n")); | |
144 | break; | |
145 | case 2: | |
146 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n")); | |
147 | break; | |
148 | case 3: | |
149 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M\n")); | |
150 | break; | |
151 | default: | |
152 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4\n")); | |
153 | break; | |
154 | } | |
155 | ||
44c10138 | 156 | switch (dev->revision) { |
1da177e4 LT |
157 | |
158 | case 0: /* PIIX4 A-step */ | |
159 | case 1: /* PIIX4 B-step */ | |
160 | /* | |
161 | * See specification changes #13 ("Manual Throttle Duty Cycle") | |
162 | * and #14 ("Enabling and Disabling Manual Throttle"), plus | |
163 | * erratum #5 ("STPCLK# Deassertion Time") from the January | |
164 | * 2002 PIIX4 specification update. Applies to only older | |
165 | * PIIX4 models. | |
166 | */ | |
167 | errata.piix4.throttle = 1; | |
168 | ||
169 | case 2: /* PIIX4E */ | |
170 | case 3: /* PIIX4M */ | |
171 | /* | |
172 | * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA | |
173 | * Livelock") from the January 2002 PIIX4 specification update. | |
174 | * Applies to all PIIX4 models. | |
175 | */ | |
176 | ||
177 | /* | |
178 | * BM-IDE | |
179 | * ------ | |
180 | * Find the PIIX4 IDE Controller and get the Bus Master IDE | |
181 | * Status register address. We'll use this later to read | |
182 | * each IDE controller's DMA status to make sure we catch all | |
183 | * DMA activity. | |
184 | */ | |
185 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
186 | PCI_DEVICE_ID_INTEL_82371AB, |
187 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
188 | if (dev) { |
189 | errata.piix4.bmisx = pci_resource_start(dev, 4); | |
190 | pci_dev_put(dev); | |
191 | } | |
192 | ||
193 | /* | |
194 | * Type-F DMA | |
195 | * ---------- | |
196 | * Find the PIIX4 ISA Controller and read the Motherboard | |
197 | * DMA controller's status to see if Type-F (Fast) DMA mode | |
198 | * is enabled (bit 7) on either channel. Note that we'll | |
199 | * disable C3 support if this is enabled, as some legacy | |
200 | * devices won't operate well if fast DMA is disabled. | |
201 | */ | |
202 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
203 | PCI_DEVICE_ID_INTEL_82371AB_0, |
204 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
205 | if (dev) { |
206 | pci_read_config_byte(dev, 0x76, &value1); | |
207 | pci_read_config_byte(dev, 0x77, &value2); | |
208 | if ((value1 & 0x80) || (value2 & 0x80)) | |
209 | errata.piix4.fdma = 1; | |
210 | pci_dev_put(dev); | |
211 | } | |
212 | ||
213 | break; | |
214 | } | |
215 | ||
216 | if (errata.piix4.bmisx) | |
217 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 218 | "Bus master activity detection (BM-IDE) erratum enabled\n")); |
1da177e4 LT |
219 | if (errata.piix4.fdma) |
220 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 221 | "Type-F DMA livelock erratum (C3 disabled)\n")); |
1da177e4 | 222 | |
d550d98d | 223 | return 0; |
1da177e4 LT |
224 | } |
225 | ||
8713cbef | 226 | static int acpi_processor_errata(struct acpi_processor *pr) |
1da177e4 | 227 | { |
4be44fcd LB |
228 | int result = 0; |
229 | struct pci_dev *dev = NULL; | |
1da177e4 | 230 | |
1da177e4 LT |
231 | |
232 | if (!pr) | |
d550d98d | 233 | return -EINVAL; |
1da177e4 LT |
234 | |
235 | /* | |
236 | * PIIX4 | |
237 | */ | |
238 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
239 | PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID, |
240 | PCI_ANY_ID, NULL); | |
1da177e4 LT |
241 | if (dev) { |
242 | result = acpi_processor_errata_piix4(dev); | |
243 | pci_dev_put(dev); | |
244 | } | |
245 | ||
d550d98d | 246 | return result; |
1da177e4 LT |
247 | } |
248 | ||
02df8b93 | 249 | /* -------------------------------------------------------------------------- |
0b28002f | 250 | Common ACPI processor functions |
02df8b93 VP |
251 | -------------------------------------------------------------------------- */ |
252 | ||
253 | /* | |
254 | * _PDC is required for a BIOS-OS handshake for most of the newer | |
255 | * ACPI processor features. | |
256 | */ | |
05131ecc | 257 | static int acpi_processor_set_pdc(struct acpi_processor *pr) |
02df8b93 | 258 | { |
05131ecc | 259 | struct acpi_object_list *pdc_in = pr->pdc; |
4be44fcd | 260 | acpi_status status = AE_OK; |
02df8b93 | 261 | |
02df8b93 | 262 | |
05131ecc | 263 | if (!pdc_in) |
d550d98d | 264 | return status; |
02df8b93 | 265 | |
05131ecc | 266 | status = acpi_evaluate_object(pr->handle, "_PDC", pdc_in, NULL); |
02df8b93 | 267 | |
05131ecc | 268 | if (ACPI_FAILURE(status)) |
4be44fcd | 269 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
05131ecc | 270 | "Could not evaluate _PDC, using legacy perf. control...\n")); |
02df8b93 | 271 | |
d550d98d | 272 | return status; |
02df8b93 VP |
273 | } |
274 | ||
1da177e4 LT |
275 | /* -------------------------------------------------------------------------- |
276 | FS Interface (/proc) | |
277 | -------------------------------------------------------------------------- */ | |
278 | ||
4be44fcd | 279 | static struct proc_dir_entry *acpi_processor_dir = NULL; |
1da177e4 LT |
280 | |
281 | static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset) | |
282 | { | |
50dd0969 | 283 | struct acpi_processor *pr = seq->private; |
1da177e4 | 284 | |
1da177e4 LT |
285 | |
286 | if (!pr) | |
287 | goto end; | |
288 | ||
289 | seq_printf(seq, "processor id: %d\n" | |
4be44fcd LB |
290 | "acpi id: %d\n" |
291 | "bus mastering control: %s\n" | |
292 | "power management: %s\n" | |
293 | "throttling control: %s\n" | |
294 | "limit interface: %s\n", | |
295 | pr->id, | |
296 | pr->acpi_id, | |
297 | pr->flags.bm_control ? "yes" : "no", | |
298 | pr->flags.power ? "yes" : "no", | |
299 | pr->flags.throttling ? "yes" : "no", | |
300 | pr->flags.limit ? "yes" : "no"); | |
301 | ||
302 | end: | |
d550d98d | 303 | return 0; |
1da177e4 LT |
304 | } |
305 | ||
306 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file) | |
307 | { | |
308 | return single_open(file, acpi_processor_info_seq_show, | |
4be44fcd | 309 | PDE(inode)->data); |
1da177e4 LT |
310 | } |
311 | ||
4be44fcd | 312 | static int acpi_processor_add_fs(struct acpi_device *device) |
1da177e4 | 313 | { |
4be44fcd | 314 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 315 | |
1da177e4 LT |
316 | |
317 | if (!acpi_device_dir(device)) { | |
318 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 319 | acpi_processor_dir); |
1da177e4 | 320 | if (!acpi_device_dir(device)) |
d550d98d | 321 | return -ENODEV; |
1da177e4 LT |
322 | } |
323 | acpi_device_dir(device)->owner = THIS_MODULE; | |
324 | ||
325 | /* 'info' [R] */ | |
326 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_INFO, | |
4be44fcd | 327 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 328 | if (!entry) |
d550d98d | 329 | return -EIO; |
1da177e4 LT |
330 | else { |
331 | entry->proc_fops = &acpi_processor_info_fops; | |
332 | entry->data = acpi_driver_data(device); | |
333 | entry->owner = THIS_MODULE; | |
334 | } | |
335 | ||
336 | /* 'throttling' [R/W] */ | |
337 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, | |
4be44fcd LB |
338 | S_IFREG | S_IRUGO | S_IWUSR, |
339 | acpi_device_dir(device)); | |
1da177e4 | 340 | if (!entry) |
d550d98d | 341 | return -EIO; |
1da177e4 LT |
342 | else { |
343 | entry->proc_fops = &acpi_processor_throttling_fops; | |
1da177e4 LT |
344 | entry->data = acpi_driver_data(device); |
345 | entry->owner = THIS_MODULE; | |
346 | } | |
347 | ||
348 | /* 'limit' [R/W] */ | |
349 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, | |
4be44fcd LB |
350 | S_IFREG | S_IRUGO | S_IWUSR, |
351 | acpi_device_dir(device)); | |
1da177e4 | 352 | if (!entry) |
d550d98d | 353 | return -EIO; |
1da177e4 LT |
354 | else { |
355 | entry->proc_fops = &acpi_processor_limit_fops; | |
1da177e4 LT |
356 | entry->data = acpi_driver_data(device); |
357 | entry->owner = THIS_MODULE; | |
358 | } | |
359 | ||
d550d98d | 360 | return 0; |
1da177e4 LT |
361 | } |
362 | ||
4be44fcd | 363 | static int acpi_processor_remove_fs(struct acpi_device *device) |
1da177e4 | 364 | { |
1da177e4 LT |
365 | |
366 | if (acpi_device_dir(device)) { | |
4be44fcd LB |
367 | remove_proc_entry(ACPI_PROCESSOR_FILE_INFO, |
368 | acpi_device_dir(device)); | |
1da177e4 | 369 | remove_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, |
4be44fcd LB |
370 | acpi_device_dir(device)); |
371 | remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, | |
372 | acpi_device_dir(device)); | |
1da177e4 LT |
373 | remove_proc_entry(acpi_device_bid(device), acpi_processor_dir); |
374 | acpi_device_dir(device) = NULL; | |
375 | } | |
376 | ||
d550d98d | 377 | return 0; |
1da177e4 LT |
378 | } |
379 | ||
380 | /* Use the acpiid in MADT to map cpus in case of SMP */ | |
f18c5a08 | 381 | |
1da177e4 | 382 | #ifndef CONFIG_SMP |
11bf04c4 | 383 | static int get_cpu_id(acpi_handle handle, u32 acpi_id) {return -1;} |
1da177e4 LT |
384 | #else |
385 | ||
f18c5a08 AS |
386 | static struct acpi_table_madt *madt; |
387 | ||
388 | static int map_lapic_id(struct acpi_subtable_header *entry, | |
389 | u32 acpi_id, int *apic_id) | |
390 | { | |
391 | struct acpi_madt_local_apic *lapic = | |
392 | (struct acpi_madt_local_apic *)entry; | |
393 | if ((lapic->lapic_flags & ACPI_MADT_ENABLED) && | |
394 | lapic->processor_id == acpi_id) { | |
395 | *apic_id = lapic->id; | |
396 | return 1; | |
397 | } | |
398 | return 0; | |
399 | } | |
400 | ||
401 | static int map_lsapic_id(struct acpi_subtable_header *entry, | |
402 | u32 acpi_id, int *apic_id) | |
403 | { | |
404 | struct acpi_madt_local_sapic *lsapic = | |
405 | (struct acpi_madt_local_sapic *)entry; | |
406 | /* Only check enabled APICs*/ | |
407 | if (lsapic->lapic_flags & ACPI_MADT_ENABLED) { | |
408 | /* First check against id */ | |
409 | if (lsapic->processor_id == acpi_id) { | |
615d5f23 | 410 | *apic_id = (lsapic->id << 8) | lsapic->eid; |
f18c5a08 AS |
411 | return 1; |
412 | /* Check against optional uid */ | |
413 | } else if (entry->length >= 16 && | |
414 | lsapic->uid == acpi_id) { | |
415 | *apic_id = lsapic->uid; | |
416 | return 1; | |
417 | } | |
418 | } | |
419 | return 0; | |
420 | } | |
421 | ||
1da177e4 | 422 | #ifdef CONFIG_IA64 |
1da177e4 | 423 | #define arch_cpu_to_apicid ia64_cpu_to_sapicid |
1da177e4 | 424 | #else |
1da177e4 | 425 | #define arch_cpu_to_apicid x86_cpu_to_apicid |
1da177e4 LT |
426 | #endif |
427 | ||
f18c5a08 AS |
428 | static int map_madt_entry(u32 acpi_id) |
429 | { | |
430 | unsigned long madt_end, entry; | |
431 | int apic_id = -1; | |
432 | ||
433 | if (!madt) | |
434 | return apic_id; | |
435 | ||
436 | entry = (unsigned long)madt; | |
437 | madt_end = entry + madt->header.length; | |
438 | ||
439 | /* Parse all entries looking for a match. */ | |
440 | ||
441 | entry += sizeof(struct acpi_table_madt); | |
442 | while (entry + sizeof(struct acpi_subtable_header) < madt_end) { | |
443 | struct acpi_subtable_header *header = | |
444 | (struct acpi_subtable_header *)entry; | |
445 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { | |
446 | if (map_lapic_id(header, acpi_id, &apic_id)) | |
447 | break; | |
448 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { | |
449 | if (map_lsapic_id(header, acpi_id, &apic_id)) | |
450 | break; | |
451 | } | |
452 | entry += header->length; | |
453 | } | |
454 | return apic_id; | |
455 | } | |
456 | ||
457 | static int map_mat_entry(acpi_handle handle, u32 acpi_id) | |
458 | { | |
459 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
460 | union acpi_object *obj; | |
461 | struct acpi_subtable_header *header; | |
462 | int apic_id = -1; | |
463 | ||
464 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) | |
465 | goto exit; | |
466 | ||
467 | if (!buffer.length || !buffer.pointer) | |
468 | goto exit; | |
469 | ||
470 | obj = buffer.pointer; | |
471 | if (obj->type != ACPI_TYPE_BUFFER || | |
472 | obj->buffer.length < sizeof(struct acpi_subtable_header)) { | |
473 | goto exit; | |
474 | } | |
475 | ||
476 | header = (struct acpi_subtable_header *)obj->buffer.pointer; | |
477 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { | |
478 | map_lapic_id(header, acpi_id, &apic_id); | |
479 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { | |
480 | map_lsapic_id(header, acpi_id, &apic_id); | |
481 | } | |
482 | ||
483 | exit: | |
484 | if (buffer.pointer) | |
485 | kfree(buffer.pointer); | |
486 | return apic_id; | |
487 | } | |
488 | ||
11bf04c4 | 489 | static int get_cpu_id(acpi_handle handle, u32 acpi_id) |
1da177e4 | 490 | { |
4a35a46b | 491 | int i; |
f18c5a08 | 492 | int apic_id = -1; |
1da177e4 | 493 | |
f18c5a08 AS |
494 | apic_id = map_mat_entry(handle, acpi_id); |
495 | if (apic_id == -1) | |
496 | apic_id = map_madt_entry(acpi_id); | |
497 | if (apic_id == -1) | |
498 | return apic_id; | |
1da177e4 | 499 | |
f18c5a08 | 500 | for (i = 0; i < NR_CPUS; ++i) { |
4a35a46b LB |
501 | if (arch_cpu_to_apicid[i] == apic_id) |
502 | return i; | |
1da177e4 LT |
503 | } |
504 | return -1; | |
505 | } | |
506 | #endif | |
507 | ||
508 | /* -------------------------------------------------------------------------- | |
509 | Driver Interface | |
510 | -------------------------------------------------------------------------- */ | |
511 | ||
11bf04c4 | 512 | static int acpi_processor_get_info(struct acpi_processor *pr, unsigned has_uid) |
1da177e4 | 513 | { |
4be44fcd LB |
514 | acpi_status status = 0; |
515 | union acpi_object object = { 0 }; | |
516 | struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; | |
df42baa0 | 517 | int cpu_index; |
4be44fcd | 518 | static int cpu0_initialized; |
1da177e4 | 519 | |
1da177e4 LT |
520 | |
521 | if (!pr) | |
d550d98d | 522 | return -EINVAL; |
1da177e4 LT |
523 | |
524 | if (num_online_cpus() > 1) | |
525 | errata.smp = TRUE; | |
526 | ||
527 | acpi_processor_errata(pr); | |
528 | ||
529 | /* | |
530 | * Check to see if we have bus mastering arbitration control. This | |
531 | * is required for proper C3 usage (to maintain cache coherency). | |
532 | */ | |
cee324b1 | 533 | if (acpi_gbl_FADT.pm2_control_block && acpi_gbl_FADT.pm2_control_length) { |
1da177e4 LT |
534 | pr->flags.bm_control = 1; |
535 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd LB |
536 | "Bus mastering arbitration control present\n")); |
537 | } else | |
1da177e4 | 538 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
4be44fcd | 539 | "No bus mastering arbitration control\n")); |
1da177e4 | 540 | |
11bf04c4 AS |
541 | /* Check if it is a Device with HID and UID */ |
542 | if (has_uid) { | |
543 | unsigned long value; | |
544 | status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID, | |
545 | NULL, &value); | |
546 | if (ACPI_FAILURE(status)) { | |
547 | printk(KERN_ERR PREFIX "Evaluating processor _UID\n"); | |
548 | return -ENODEV; | |
549 | } | |
550 | pr->acpi_id = value; | |
551 | } else { | |
552 | /* | |
553 | * Evalute the processor object. Note that it is common on SMP to | |
554 | * have the first (boot) processor with a valid PBLK address while | |
555 | * all others have a NULL address. | |
556 | */ | |
557 | status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); | |
558 | if (ACPI_FAILURE(status)) { | |
559 | printk(KERN_ERR PREFIX "Evaluating processor object\n"); | |
560 | return -ENODEV; | |
561 | } | |
1da177e4 | 562 | |
11bf04c4 AS |
563 | /* |
564 | * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. | |
565 | * >>> 'acpi_get_processor_id(acpi_id, &id)' in arch/xxx/acpi.c | |
566 | */ | |
567 | pr->acpi_id = object.processor.proc_id; | |
568 | } | |
569 | cpu_index = get_cpu_id(pr->handle, pr->acpi_id); | |
1da177e4 | 570 | |
4be44fcd | 571 | /* Handle UP system running SMP kernel, with no LAPIC in MADT */ |
df42baa0 | 572 | if (!cpu0_initialized && (cpu_index == -1) && |
4be44fcd LB |
573 | (num_online_cpus() == 1)) { |
574 | cpu_index = 0; | |
575 | } | |
576 | ||
577 | cpu0_initialized = 1; | |
578 | ||
579 | pr->id = cpu_index; | |
580 | ||
581 | /* | |
582 | * Extra Processor objects may be enumerated on MP systems with | |
583 | * less than the max # of CPUs. They should be ignored _iff | |
584 | * they are physically not present. | |
585 | */ | |
f18c5a08 | 586 | if (pr->id == -1) { |
4be44fcd LB |
587 | if (ACPI_FAILURE |
588 | (acpi_processor_hotadd_init(pr->handle, &pr->id))) { | |
d550d98d | 589 | return -ENODEV; |
4be44fcd LB |
590 | } |
591 | } | |
1da177e4 LT |
592 | |
593 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, | |
4be44fcd | 594 | pr->acpi_id)); |
1da177e4 LT |
595 | |
596 | if (!object.processor.pblk_address) | |
597 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n")); | |
598 | else if (object.processor.pblk_length != 6) | |
6468463a LB |
599 | printk(KERN_ERR PREFIX "Invalid PBLK length [%d]\n", |
600 | object.processor.pblk_length); | |
1da177e4 LT |
601 | else { |
602 | pr->throttling.address = object.processor.pblk_address; | |
cee324b1 AS |
603 | pr->throttling.duty_offset = acpi_gbl_FADT.duty_offset; |
604 | pr->throttling.duty_width = acpi_gbl_FADT.duty_width; | |
1da177e4 LT |
605 | |
606 | pr->pblk = object.processor.pblk_address; | |
607 | ||
608 | /* | |
609 | * We don't care about error returns - we just try to mark | |
610 | * these reserved so that nobody else is confused into thinking | |
611 | * that this region might be unused.. | |
612 | * | |
613 | * (In particular, allocating the IO range for Cardbus) | |
614 | */ | |
615 | request_region(pr->throttling.address, 6, "ACPI CPU throttle"); | |
616 | } | |
617 | ||
618 | #ifdef CONFIG_CPU_FREQ | |
619 | acpi_processor_ppc_has_changed(pr); | |
620 | #endif | |
621 | acpi_processor_get_throttling_info(pr); | |
622 | acpi_processor_get_limit_info(pr); | |
623 | ||
d550d98d | 624 | return 0; |
1da177e4 LT |
625 | } |
626 | ||
cd8e2b48 VP |
627 | static void *processor_device_array[NR_CPUS]; |
628 | ||
7af8b660 | 629 | static int __cpuinit acpi_processor_start(struct acpi_device *device) |
1da177e4 | 630 | { |
4be44fcd LB |
631 | int result = 0; |
632 | acpi_status status = AE_OK; | |
633 | struct acpi_processor *pr; | |
1da177e4 | 634 | |
1da177e4 LT |
635 | |
636 | pr = acpi_driver_data(device); | |
637 | ||
11bf04c4 | 638 | result = acpi_processor_get_info(pr, device->flags.unique_id); |
1da177e4 LT |
639 | if (result) { |
640 | /* Processor is physically not present */ | |
d550d98d | 641 | return 0; |
1da177e4 LT |
642 | } |
643 | ||
644 | BUG_ON((pr->id >= NR_CPUS) || (pr->id < 0)); | |
645 | ||
cd8e2b48 VP |
646 | /* |
647 | * Buggy BIOS check | |
648 | * ACPI id of processors can be reported wrongly by the BIOS. | |
649 | * Don't trust it blindly | |
650 | */ | |
651 | if (processor_device_array[pr->id] != NULL && | |
50dd0969 | 652 | processor_device_array[pr->id] != device) { |
0eacee58 LB |
653 | printk(KERN_WARNING "BIOS reported wrong ACPI id" |
654 | "for the processor\n"); | |
d550d98d | 655 | return -ENODEV; |
cd8e2b48 | 656 | } |
50dd0969 | 657 | processor_device_array[pr->id] = device; |
cd8e2b48 | 658 | |
1da177e4 LT |
659 | processors[pr->id] = pr; |
660 | ||
661 | result = acpi_processor_add_fs(device); | |
662 | if (result) | |
663 | goto end; | |
664 | ||
665 | status = acpi_install_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, | |
4be44fcd | 666 | acpi_processor_notify, pr); |
1da177e4 | 667 | |
05131ecc VP |
668 | /* _PDC call should be done before doing anything else (if reqd.). */ |
669 | arch_acpi_processor_init_pdc(pr); | |
670 | acpi_processor_set_pdc(pr); | |
671 | ||
1da177e4 LT |
672 | acpi_processor_power_init(pr, device); |
673 | ||
674 | if (pr->flags.throttling) { | |
675 | printk(KERN_INFO PREFIX "%s [%s] (supports", | |
4be44fcd | 676 | acpi_device_name(device), acpi_device_bid(device)); |
1da177e4 LT |
677 | printk(" %d throttling states", pr->throttling.state_count); |
678 | printk(")\n"); | |
679 | } | |
680 | ||
4be44fcd | 681 | end: |
1da177e4 | 682 | |
d550d98d | 683 | return result; |
1da177e4 LT |
684 | } |
685 | ||
4be44fcd | 686 | static void acpi_processor_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 687 | { |
50dd0969 | 688 | struct acpi_processor *pr = data; |
4be44fcd | 689 | struct acpi_device *device = NULL; |
1da177e4 | 690 | |
1da177e4 LT |
691 | |
692 | if (!pr) | |
d550d98d | 693 | return; |
1da177e4 LT |
694 | |
695 | if (acpi_bus_get_device(pr->handle, &device)) | |
d550d98d | 696 | return; |
1da177e4 LT |
697 | |
698 | switch (event) { | |
699 | case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: | |
700 | acpi_processor_ppc_has_changed(pr); | |
14e04fb3 | 701 | acpi_bus_generate_proc_event(device, event, |
4be44fcd | 702 | pr->performance_platform_limit); |
962ce8ca ZR |
703 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
704 | device->dev.bus_id, event, | |
705 | pr->performance_platform_limit); | |
1da177e4 LT |
706 | break; |
707 | case ACPI_PROCESSOR_NOTIFY_POWER: | |
708 | acpi_processor_cst_has_changed(pr); | |
14e04fb3 | 709 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
710 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
711 | device->dev.bus_id, event, 0); | |
1da177e4 | 712 | break; |
01854e69 LY |
713 | case ACPI_PROCESSOR_NOTIFY_THROTTLING: |
714 | acpi_processor_tstate_has_changed(pr); | |
14e04fb3 | 715 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
716 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
717 | device->dev.bus_id, event, 0); | |
1da177e4 LT |
718 | default: |
719 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 720 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
721 | break; |
722 | } | |
723 | ||
d550d98d | 724 | return; |
1da177e4 LT |
725 | } |
726 | ||
4be44fcd | 727 | static int acpi_processor_add(struct acpi_device *device) |
1da177e4 | 728 | { |
4be44fcd | 729 | struct acpi_processor *pr = NULL; |
1da177e4 | 730 | |
1da177e4 LT |
731 | |
732 | if (!device) | |
d550d98d | 733 | return -EINVAL; |
1da177e4 | 734 | |
36bcbec7 | 735 | pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL); |
1da177e4 | 736 | if (!pr) |
d550d98d | 737 | return -ENOMEM; |
1da177e4 LT |
738 | |
739 | pr->handle = device->handle; | |
740 | strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); | |
741 | strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); | |
742 | acpi_driver_data(device) = pr; | |
743 | ||
d550d98d | 744 | return 0; |
1da177e4 LT |
745 | } |
746 | ||
4be44fcd | 747 | static int acpi_processor_remove(struct acpi_device *device, int type) |
1da177e4 | 748 | { |
4be44fcd LB |
749 | acpi_status status = AE_OK; |
750 | struct acpi_processor *pr = NULL; | |
1da177e4 | 751 | |
1da177e4 LT |
752 | |
753 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 754 | return -EINVAL; |
1da177e4 | 755 | |
50dd0969 | 756 | pr = acpi_driver_data(device); |
1da177e4 LT |
757 | |
758 | if (pr->id >= NR_CPUS) { | |
759 | kfree(pr); | |
d550d98d | 760 | return 0; |
1da177e4 LT |
761 | } |
762 | ||
763 | if (type == ACPI_BUS_REMOVAL_EJECT) { | |
764 | if (acpi_processor_handle_eject(pr)) | |
d550d98d | 765 | return -EINVAL; |
1da177e4 LT |
766 | } |
767 | ||
768 | acpi_processor_power_exit(pr, device); | |
769 | ||
770 | status = acpi_remove_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, | |
4be44fcd | 771 | acpi_processor_notify); |
1da177e4 LT |
772 | |
773 | acpi_processor_remove_fs(device); | |
774 | ||
775 | processors[pr->id] = NULL; | |
776 | ||
777 | kfree(pr); | |
778 | ||
d550d98d | 779 | return 0; |
1da177e4 LT |
780 | } |
781 | ||
782 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
783 | /**************************************************************************** | |
784 | * Acpi processor hotplug support * | |
785 | ****************************************************************************/ | |
786 | ||
787 | static int is_processor_present(acpi_handle handle); | |
788 | ||
4be44fcd | 789 | static int is_processor_present(acpi_handle handle) |
1da177e4 | 790 | { |
4be44fcd LB |
791 | acpi_status status; |
792 | unsigned long sta = 0; | |
1da177e4 | 793 | |
1da177e4 LT |
794 | |
795 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
a0bd4ac4 | 796 | if (ACPI_FAILURE(status) || !(sta & ACPI_STA_DEVICE_PRESENT)) { |
a6fc6720 | 797 | ACPI_EXCEPTION((AE_INFO, status, "Processor Device is not present")); |
d550d98d | 798 | return 0; |
1da177e4 | 799 | } |
d550d98d | 800 | return 1; |
1da177e4 LT |
801 | } |
802 | ||
1da177e4 | 803 | static |
4be44fcd | 804 | int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 805 | { |
4be44fcd LB |
806 | acpi_handle phandle; |
807 | struct acpi_device *pdev; | |
808 | struct acpi_processor *pr; | |
1da177e4 | 809 | |
1da177e4 LT |
810 | |
811 | if (acpi_get_parent(handle, &phandle)) { | |
d550d98d | 812 | return -ENODEV; |
1da177e4 LT |
813 | } |
814 | ||
815 | if (acpi_bus_get_device(phandle, &pdev)) { | |
d550d98d | 816 | return -ENODEV; |
1da177e4 LT |
817 | } |
818 | ||
819 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { | |
d550d98d | 820 | return -ENODEV; |
1da177e4 LT |
821 | } |
822 | ||
3fb02738 | 823 | acpi_bus_start(*device); |
1da177e4 LT |
824 | |
825 | pr = acpi_driver_data(*device); | |
826 | if (!pr) | |
d550d98d | 827 | return -ENODEV; |
1da177e4 | 828 | |
4be44fcd | 829 | if ((pr->id >= 0) && (pr->id < NR_CPUS)) { |
f883d9db | 830 | kobject_uevent(&(*device)->dev.kobj, KOBJ_ONLINE); |
1da177e4 | 831 | } |
d550d98d | 832 | return 0; |
1da177e4 LT |
833 | } |
834 | ||
1da177e4 | 835 | static void |
4be44fcd | 836 | acpi_processor_hotplug_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 837 | { |
4be44fcd LB |
838 | struct acpi_processor *pr; |
839 | struct acpi_device *device = NULL; | |
1da177e4 LT |
840 | int result; |
841 | ||
1da177e4 LT |
842 | |
843 | switch (event) { | |
844 | case ACPI_NOTIFY_BUS_CHECK: | |
845 | case ACPI_NOTIFY_DEVICE_CHECK: | |
846 | printk("Processor driver received %s event\n", | |
4be44fcd LB |
847 | (event == ACPI_NOTIFY_BUS_CHECK) ? |
848 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK"); | |
1da177e4 LT |
849 | |
850 | if (!is_processor_present(handle)) | |
851 | break; | |
852 | ||
853 | if (acpi_bus_get_device(handle, &device)) { | |
854 | result = acpi_processor_device_add(handle, &device); | |
855 | if (result) | |
6468463a LB |
856 | printk(KERN_ERR PREFIX |
857 | "Unable to add the device\n"); | |
1da177e4 LT |
858 | break; |
859 | } | |
860 | ||
861 | pr = acpi_driver_data(device); | |
862 | if (!pr) { | |
6468463a | 863 | printk(KERN_ERR PREFIX "Driver data is NULL\n"); |
1da177e4 LT |
864 | break; |
865 | } | |
866 | ||
867 | if (pr->id >= 0 && (pr->id < NR_CPUS)) { | |
f883d9db | 868 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
1da177e4 LT |
869 | break; |
870 | } | |
871 | ||
872 | result = acpi_processor_start(device); | |
4be44fcd | 873 | if ((!result) && ((pr->id >= 0) && (pr->id < NR_CPUS))) { |
f883d9db | 874 | kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); |
1da177e4 | 875 | } else { |
6468463a LB |
876 | printk(KERN_ERR PREFIX "Device [%s] failed to start\n", |
877 | acpi_device_bid(device)); | |
1da177e4 | 878 | } |
4be44fcd | 879 | break; |
1da177e4 | 880 | case ACPI_NOTIFY_EJECT_REQUEST: |
4be44fcd LB |
881 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
882 | "received ACPI_NOTIFY_EJECT_REQUEST\n")); | |
1da177e4 LT |
883 | |
884 | if (acpi_bus_get_device(handle, &device)) { | |
6468463a LB |
885 | printk(KERN_ERR PREFIX |
886 | "Device don't exist, dropping EJECT\n"); | |
1da177e4 LT |
887 | break; |
888 | } | |
889 | pr = acpi_driver_data(device); | |
890 | if (!pr) { | |
6468463a LB |
891 | printk(KERN_ERR PREFIX |
892 | "Driver data is NULL, dropping EJECT\n"); | |
d550d98d | 893 | return; |
1da177e4 LT |
894 | } |
895 | ||
896 | if ((pr->id < NR_CPUS) && (cpu_present(pr->id))) | |
f883d9db | 897 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
1da177e4 LT |
898 | break; |
899 | default: | |
900 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 901 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
902 | break; |
903 | } | |
904 | ||
d550d98d | 905 | return; |
1da177e4 LT |
906 | } |
907 | ||
908 | static acpi_status | |
909 | processor_walk_namespace_cb(acpi_handle handle, | |
4be44fcd | 910 | u32 lvl, void *context, void **rv) |
1da177e4 | 911 | { |
4be44fcd | 912 | acpi_status status; |
1da177e4 | 913 | int *action = context; |
4be44fcd | 914 | acpi_object_type type = 0; |
1da177e4 LT |
915 | |
916 | status = acpi_get_type(handle, &type); | |
917 | if (ACPI_FAILURE(status)) | |
4be44fcd | 918 | return (AE_OK); |
1da177e4 LT |
919 | |
920 | if (type != ACPI_TYPE_PROCESSOR) | |
4be44fcd | 921 | return (AE_OK); |
1da177e4 | 922 | |
4be44fcd | 923 | switch (*action) { |
1da177e4 LT |
924 | case INSTALL_NOTIFY_HANDLER: |
925 | acpi_install_notify_handler(handle, | |
4be44fcd LB |
926 | ACPI_SYSTEM_NOTIFY, |
927 | acpi_processor_hotplug_notify, | |
928 | NULL); | |
1da177e4 LT |
929 | break; |
930 | case UNINSTALL_NOTIFY_HANDLER: | |
931 | acpi_remove_notify_handler(handle, | |
4be44fcd LB |
932 | ACPI_SYSTEM_NOTIFY, |
933 | acpi_processor_hotplug_notify); | |
1da177e4 LT |
934 | break; |
935 | default: | |
936 | break; | |
937 | } | |
938 | ||
4be44fcd | 939 | return (AE_OK); |
1da177e4 LT |
940 | } |
941 | ||
4be44fcd | 942 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 | 943 | { |
1da177e4 LT |
944 | |
945 | if (!is_processor_present(handle)) { | |
d550d98d | 946 | return AE_ERROR; |
1da177e4 LT |
947 | } |
948 | ||
949 | if (acpi_map_lsapic(handle, p_cpu)) | |
d550d98d | 950 | return AE_ERROR; |
1da177e4 LT |
951 | |
952 | if (arch_register_cpu(*p_cpu)) { | |
953 | acpi_unmap_lsapic(*p_cpu); | |
d550d98d | 954 | return AE_ERROR; |
1da177e4 LT |
955 | } |
956 | ||
d550d98d | 957 | return AE_OK; |
1da177e4 LT |
958 | } |
959 | ||
4be44fcd | 960 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 LT |
961 | { |
962 | if (cpu_online(pr->id)) { | |
4be44fcd | 963 | return (-EINVAL); |
1da177e4 LT |
964 | } |
965 | arch_unregister_cpu(pr->id); | |
966 | acpi_unmap_lsapic(pr->id); | |
4be44fcd | 967 | return (0); |
1da177e4 LT |
968 | } |
969 | #else | |
4be44fcd | 970 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 LT |
971 | { |
972 | return AE_ERROR; | |
973 | } | |
4be44fcd | 974 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 | 975 | { |
4be44fcd | 976 | return (-EINVAL); |
1da177e4 LT |
977 | } |
978 | #endif | |
979 | ||
1da177e4 LT |
980 | static |
981 | void acpi_processor_install_hotplug_notify(void) | |
982 | { | |
983 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
984 | int action = INSTALL_NOTIFY_HANDLER; | |
985 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
986 | ACPI_ROOT_OBJECT, |
987 | ACPI_UINT32_MAX, | |
988 | processor_walk_namespace_cb, &action, NULL); | |
1da177e4 LT |
989 | #endif |
990 | } | |
991 | ||
1da177e4 LT |
992 | static |
993 | void acpi_processor_uninstall_hotplug_notify(void) | |
994 | { | |
995 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
996 | int action = UNINSTALL_NOTIFY_HANDLER; | |
997 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
998 | ACPI_ROOT_OBJECT, |
999 | ACPI_UINT32_MAX, | |
1000 | processor_walk_namespace_cb, &action, NULL); | |
1da177e4 LT |
1001 | #endif |
1002 | } | |
1003 | ||
1004 | /* | |
1005 | * We keep the driver loaded even when ACPI is not running. | |
1006 | * This is needed for the powernow-k8 driver, that works even without | |
1007 | * ACPI, but needs symbols from this driver | |
1008 | */ | |
1009 | ||
4be44fcd | 1010 | static int __init acpi_processor_init(void) |
1da177e4 | 1011 | { |
4be44fcd | 1012 | int result = 0; |
1da177e4 | 1013 | |
1da177e4 LT |
1014 | |
1015 | memset(&processors, 0, sizeof(processors)); | |
1016 | memset(&errata, 0, sizeof(errata)); | |
1017 | ||
f18c5a08 AS |
1018 | #ifdef CONFIG_SMP |
1019 | if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0, | |
1020 | (struct acpi_table_header **)&madt))) | |
70c0846e | 1021 | madt = NULL; |
f18c5a08 AS |
1022 | #endif |
1023 | ||
1da177e4 LT |
1024 | acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
1025 | if (!acpi_processor_dir) | |
83822fc9 | 1026 | return -ENOMEM; |
1da177e4 LT |
1027 | acpi_processor_dir->owner = THIS_MODULE; |
1028 | ||
1029 | result = acpi_bus_register_driver(&acpi_processor_driver); | |
1030 | if (result < 0) { | |
1031 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); | |
83822fc9 | 1032 | return result; |
1da177e4 LT |
1033 | } |
1034 | ||
1035 | acpi_processor_install_hotplug_notify(); | |
1036 | ||
1037 | acpi_thermal_cpufreq_init(); | |
1038 | ||
1039 | acpi_processor_ppc_init(); | |
1040 | ||
d550d98d | 1041 | return 0; |
1da177e4 LT |
1042 | } |
1043 | ||
4be44fcd | 1044 | static void __exit acpi_processor_exit(void) |
1da177e4 | 1045 | { |
1da177e4 LT |
1046 | |
1047 | acpi_processor_ppc_exit(); | |
1048 | ||
1049 | acpi_thermal_cpufreq_exit(); | |
1050 | ||
1051 | acpi_processor_uninstall_hotplug_notify(); | |
1052 | ||
1053 | acpi_bus_unregister_driver(&acpi_processor_driver); | |
1054 | ||
1055 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); | |
1056 | ||
d550d98d | 1057 | return; |
1da177e4 LT |
1058 | } |
1059 | ||
1da177e4 LT |
1060 | module_init(acpi_processor_init); |
1061 | module_exit(acpi_processor_exit); | |
1062 | ||
1063 | EXPORT_SYMBOL(acpi_processor_set_thermal_limit); | |
1064 | ||
1065 | MODULE_ALIAS("processor"); |