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, | |
b04e7bdb TG |
105 | .suspend = acpi_processor_suspend, |
106 | .resume = acpi_processor_resume, | |
4be44fcd | 107 | }, |
1da177e4 LT |
108 | }; |
109 | ||
110 | #define INSTALL_NOTIFY_HANDLER 1 | |
111 | #define UNINSTALL_NOTIFY_HANDLER 2 | |
112 | ||
d7508032 | 113 | static const struct file_operations acpi_processor_info_fops = { |
4be44fcd LB |
114 | .open = acpi_processor_info_open_fs, |
115 | .read = seq_read, | |
116 | .llseek = seq_lseek, | |
117 | .release = single_release, | |
1da177e4 LT |
118 | }; |
119 | ||
4be44fcd | 120 | struct acpi_processor *processors[NR_CPUS]; |
9f222718 | 121 | struct acpi_processor_errata errata __read_mostly; |
1da177e4 | 122 | |
1da177e4 LT |
123 | /* -------------------------------------------------------------------------- |
124 | Errata Handling | |
125 | -------------------------------------------------------------------------- */ | |
126 | ||
4be44fcd | 127 | static int acpi_processor_errata_piix4(struct pci_dev *dev) |
1da177e4 | 128 | { |
4be44fcd LB |
129 | u8 value1 = 0; |
130 | u8 value2 = 0; | |
1da177e4 | 131 | |
1da177e4 LT |
132 | |
133 | if (!dev) | |
d550d98d | 134 | return -EINVAL; |
1da177e4 LT |
135 | |
136 | /* | |
137 | * Note that 'dev' references the PIIX4 ACPI Controller. | |
138 | */ | |
139 | ||
44c10138 | 140 | switch (dev->revision) { |
1da177e4 LT |
141 | case 0: |
142 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n")); | |
143 | break; | |
144 | case 1: | |
145 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n")); | |
146 | break; | |
147 | case 2: | |
148 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n")); | |
149 | break; | |
150 | case 3: | |
151 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M\n")); | |
152 | break; | |
153 | default: | |
154 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4\n")); | |
155 | break; | |
156 | } | |
157 | ||
44c10138 | 158 | switch (dev->revision) { |
1da177e4 LT |
159 | |
160 | case 0: /* PIIX4 A-step */ | |
161 | case 1: /* PIIX4 B-step */ | |
162 | /* | |
163 | * See specification changes #13 ("Manual Throttle Duty Cycle") | |
164 | * and #14 ("Enabling and Disabling Manual Throttle"), plus | |
165 | * erratum #5 ("STPCLK# Deassertion Time") from the January | |
166 | * 2002 PIIX4 specification update. Applies to only older | |
167 | * PIIX4 models. | |
168 | */ | |
169 | errata.piix4.throttle = 1; | |
170 | ||
171 | case 2: /* PIIX4E */ | |
172 | case 3: /* PIIX4M */ | |
173 | /* | |
174 | * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA | |
175 | * Livelock") from the January 2002 PIIX4 specification update. | |
176 | * Applies to all PIIX4 models. | |
177 | */ | |
178 | ||
179 | /* | |
180 | * BM-IDE | |
181 | * ------ | |
182 | * Find the PIIX4 IDE Controller and get the Bus Master IDE | |
183 | * Status register address. We'll use this later to read | |
184 | * each IDE controller's DMA status to make sure we catch all | |
185 | * DMA activity. | |
186 | */ | |
187 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
188 | PCI_DEVICE_ID_INTEL_82371AB, |
189 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
190 | if (dev) { |
191 | errata.piix4.bmisx = pci_resource_start(dev, 4); | |
192 | pci_dev_put(dev); | |
193 | } | |
194 | ||
195 | /* | |
196 | * Type-F DMA | |
197 | * ---------- | |
198 | * Find the PIIX4 ISA Controller and read the Motherboard | |
199 | * DMA controller's status to see if Type-F (Fast) DMA mode | |
200 | * is enabled (bit 7) on either channel. Note that we'll | |
201 | * disable C3 support if this is enabled, as some legacy | |
202 | * devices won't operate well if fast DMA is disabled. | |
203 | */ | |
204 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
205 | PCI_DEVICE_ID_INTEL_82371AB_0, |
206 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
207 | if (dev) { |
208 | pci_read_config_byte(dev, 0x76, &value1); | |
209 | pci_read_config_byte(dev, 0x77, &value2); | |
210 | if ((value1 & 0x80) || (value2 & 0x80)) | |
211 | errata.piix4.fdma = 1; | |
212 | pci_dev_put(dev); | |
213 | } | |
214 | ||
215 | break; | |
216 | } | |
217 | ||
218 | if (errata.piix4.bmisx) | |
219 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 220 | "Bus master activity detection (BM-IDE) erratum enabled\n")); |
1da177e4 LT |
221 | if (errata.piix4.fdma) |
222 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 223 | "Type-F DMA livelock erratum (C3 disabled)\n")); |
1da177e4 | 224 | |
d550d98d | 225 | return 0; |
1da177e4 LT |
226 | } |
227 | ||
8713cbef | 228 | static int acpi_processor_errata(struct acpi_processor *pr) |
1da177e4 | 229 | { |
4be44fcd LB |
230 | int result = 0; |
231 | struct pci_dev *dev = NULL; | |
1da177e4 | 232 | |
1da177e4 LT |
233 | |
234 | if (!pr) | |
d550d98d | 235 | return -EINVAL; |
1da177e4 LT |
236 | |
237 | /* | |
238 | * PIIX4 | |
239 | */ | |
240 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
241 | PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID, |
242 | PCI_ANY_ID, NULL); | |
1da177e4 LT |
243 | if (dev) { |
244 | result = acpi_processor_errata_piix4(dev); | |
245 | pci_dev_put(dev); | |
246 | } | |
247 | ||
d550d98d | 248 | return result; |
1da177e4 LT |
249 | } |
250 | ||
02df8b93 | 251 | /* -------------------------------------------------------------------------- |
0b28002f | 252 | Common ACPI processor functions |
02df8b93 VP |
253 | -------------------------------------------------------------------------- */ |
254 | ||
255 | /* | |
256 | * _PDC is required for a BIOS-OS handshake for most of the newer | |
257 | * ACPI processor features. | |
258 | */ | |
05131ecc | 259 | static int acpi_processor_set_pdc(struct acpi_processor *pr) |
02df8b93 | 260 | { |
05131ecc | 261 | struct acpi_object_list *pdc_in = pr->pdc; |
4be44fcd | 262 | acpi_status status = AE_OK; |
02df8b93 | 263 | |
02df8b93 | 264 | |
05131ecc | 265 | if (!pdc_in) |
d550d98d | 266 | return status; |
02df8b93 | 267 | |
05131ecc | 268 | status = acpi_evaluate_object(pr->handle, "_PDC", pdc_in, NULL); |
02df8b93 | 269 | |
05131ecc | 270 | if (ACPI_FAILURE(status)) |
4be44fcd | 271 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
05131ecc | 272 | "Could not evaluate _PDC, using legacy perf. control...\n")); |
02df8b93 | 273 | |
d550d98d | 274 | return status; |
02df8b93 VP |
275 | } |
276 | ||
1da177e4 LT |
277 | /* -------------------------------------------------------------------------- |
278 | FS Interface (/proc) | |
279 | -------------------------------------------------------------------------- */ | |
280 | ||
4be44fcd | 281 | static struct proc_dir_entry *acpi_processor_dir = NULL; |
1da177e4 LT |
282 | |
283 | static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset) | |
284 | { | |
50dd0969 | 285 | struct acpi_processor *pr = seq->private; |
1da177e4 | 286 | |
1da177e4 LT |
287 | |
288 | if (!pr) | |
289 | goto end; | |
290 | ||
291 | seq_printf(seq, "processor id: %d\n" | |
4be44fcd LB |
292 | "acpi id: %d\n" |
293 | "bus mastering control: %s\n" | |
294 | "power management: %s\n" | |
295 | "throttling control: %s\n" | |
296 | "limit interface: %s\n", | |
297 | pr->id, | |
298 | pr->acpi_id, | |
299 | pr->flags.bm_control ? "yes" : "no", | |
300 | pr->flags.power ? "yes" : "no", | |
301 | pr->flags.throttling ? "yes" : "no", | |
302 | pr->flags.limit ? "yes" : "no"); | |
303 | ||
304 | end: | |
d550d98d | 305 | return 0; |
1da177e4 LT |
306 | } |
307 | ||
308 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file) | |
309 | { | |
310 | return single_open(file, acpi_processor_info_seq_show, | |
4be44fcd | 311 | PDE(inode)->data); |
1da177e4 LT |
312 | } |
313 | ||
4be44fcd | 314 | static int acpi_processor_add_fs(struct acpi_device *device) |
1da177e4 | 315 | { |
4be44fcd | 316 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 317 | |
1da177e4 LT |
318 | |
319 | if (!acpi_device_dir(device)) { | |
320 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 321 | acpi_processor_dir); |
1da177e4 | 322 | if (!acpi_device_dir(device)) |
d550d98d | 323 | return -ENODEV; |
1da177e4 LT |
324 | } |
325 | acpi_device_dir(device)->owner = THIS_MODULE; | |
326 | ||
327 | /* 'info' [R] */ | |
328 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_INFO, | |
4be44fcd | 329 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 330 | if (!entry) |
d550d98d | 331 | return -EIO; |
1da177e4 LT |
332 | else { |
333 | entry->proc_fops = &acpi_processor_info_fops; | |
334 | entry->data = acpi_driver_data(device); | |
335 | entry->owner = THIS_MODULE; | |
336 | } | |
337 | ||
338 | /* 'throttling' [R/W] */ | |
339 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, | |
4be44fcd LB |
340 | S_IFREG | S_IRUGO | S_IWUSR, |
341 | acpi_device_dir(device)); | |
1da177e4 | 342 | if (!entry) |
d550d98d | 343 | return -EIO; |
1da177e4 LT |
344 | else { |
345 | entry->proc_fops = &acpi_processor_throttling_fops; | |
1da177e4 LT |
346 | entry->data = acpi_driver_data(device); |
347 | entry->owner = THIS_MODULE; | |
348 | } | |
349 | ||
350 | /* 'limit' [R/W] */ | |
351 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, | |
4be44fcd LB |
352 | S_IFREG | S_IRUGO | S_IWUSR, |
353 | acpi_device_dir(device)); | |
1da177e4 | 354 | if (!entry) |
d550d98d | 355 | return -EIO; |
1da177e4 LT |
356 | else { |
357 | entry->proc_fops = &acpi_processor_limit_fops; | |
1da177e4 LT |
358 | entry->data = acpi_driver_data(device); |
359 | entry->owner = THIS_MODULE; | |
360 | } | |
361 | ||
d550d98d | 362 | return 0; |
1da177e4 LT |
363 | } |
364 | ||
4be44fcd | 365 | static int acpi_processor_remove_fs(struct acpi_device *device) |
1da177e4 | 366 | { |
1da177e4 LT |
367 | |
368 | if (acpi_device_dir(device)) { | |
4be44fcd LB |
369 | remove_proc_entry(ACPI_PROCESSOR_FILE_INFO, |
370 | acpi_device_dir(device)); | |
1da177e4 | 371 | remove_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, |
4be44fcd LB |
372 | acpi_device_dir(device)); |
373 | remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, | |
374 | acpi_device_dir(device)); | |
1da177e4 LT |
375 | remove_proc_entry(acpi_device_bid(device), acpi_processor_dir); |
376 | acpi_device_dir(device) = NULL; | |
377 | } | |
378 | ||
d550d98d | 379 | return 0; |
1da177e4 LT |
380 | } |
381 | ||
382 | /* Use the acpiid in MADT to map cpus in case of SMP */ | |
f18c5a08 | 383 | |
1da177e4 | 384 | #ifndef CONFIG_SMP |
11bf04c4 | 385 | static int get_cpu_id(acpi_handle handle, u32 acpi_id) {return -1;} |
1da177e4 LT |
386 | #else |
387 | ||
f18c5a08 AS |
388 | static struct acpi_table_madt *madt; |
389 | ||
390 | static int map_lapic_id(struct acpi_subtable_header *entry, | |
391 | u32 acpi_id, int *apic_id) | |
392 | { | |
393 | struct acpi_madt_local_apic *lapic = | |
394 | (struct acpi_madt_local_apic *)entry; | |
395 | if ((lapic->lapic_flags & ACPI_MADT_ENABLED) && | |
396 | lapic->processor_id == acpi_id) { | |
397 | *apic_id = lapic->id; | |
398 | return 1; | |
399 | } | |
400 | return 0; | |
401 | } | |
402 | ||
403 | static int map_lsapic_id(struct acpi_subtable_header *entry, | |
404 | u32 acpi_id, int *apic_id) | |
405 | { | |
406 | struct acpi_madt_local_sapic *lsapic = | |
407 | (struct acpi_madt_local_sapic *)entry; | |
408 | /* Only check enabled APICs*/ | |
409 | if (lsapic->lapic_flags & ACPI_MADT_ENABLED) { | |
410 | /* First check against id */ | |
411 | if (lsapic->processor_id == acpi_id) { | |
615d5f23 | 412 | *apic_id = (lsapic->id << 8) | lsapic->eid; |
f18c5a08 AS |
413 | return 1; |
414 | /* Check against optional uid */ | |
415 | } else if (entry->length >= 16 && | |
416 | lsapic->uid == acpi_id) { | |
417 | *apic_id = lsapic->uid; | |
418 | return 1; | |
419 | } | |
420 | } | |
421 | return 0; | |
422 | } | |
423 | ||
1da177e4 | 424 | #ifdef CONFIG_IA64 |
1da177e4 | 425 | #define arch_cpu_to_apicid ia64_cpu_to_sapicid |
1da177e4 | 426 | #else |
1da177e4 | 427 | #define arch_cpu_to_apicid x86_cpu_to_apicid |
1da177e4 LT |
428 | #endif |
429 | ||
f18c5a08 AS |
430 | static int map_madt_entry(u32 acpi_id) |
431 | { | |
432 | unsigned long madt_end, entry; | |
433 | int apic_id = -1; | |
434 | ||
435 | if (!madt) | |
436 | return apic_id; | |
437 | ||
438 | entry = (unsigned long)madt; | |
439 | madt_end = entry + madt->header.length; | |
440 | ||
441 | /* Parse all entries looking for a match. */ | |
442 | ||
443 | entry += sizeof(struct acpi_table_madt); | |
444 | while (entry + sizeof(struct acpi_subtable_header) < madt_end) { | |
445 | struct acpi_subtable_header *header = | |
446 | (struct acpi_subtable_header *)entry; | |
447 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { | |
448 | if (map_lapic_id(header, acpi_id, &apic_id)) | |
449 | break; | |
450 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { | |
451 | if (map_lsapic_id(header, acpi_id, &apic_id)) | |
452 | break; | |
453 | } | |
454 | entry += header->length; | |
455 | } | |
456 | return apic_id; | |
457 | } | |
458 | ||
459 | static int map_mat_entry(acpi_handle handle, u32 acpi_id) | |
460 | { | |
461 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
462 | union acpi_object *obj; | |
463 | struct acpi_subtable_header *header; | |
464 | int apic_id = -1; | |
465 | ||
466 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) | |
467 | goto exit; | |
468 | ||
469 | if (!buffer.length || !buffer.pointer) | |
470 | goto exit; | |
471 | ||
472 | obj = buffer.pointer; | |
473 | if (obj->type != ACPI_TYPE_BUFFER || | |
474 | obj->buffer.length < sizeof(struct acpi_subtable_header)) { | |
475 | goto exit; | |
476 | } | |
477 | ||
478 | header = (struct acpi_subtable_header *)obj->buffer.pointer; | |
479 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { | |
480 | map_lapic_id(header, acpi_id, &apic_id); | |
481 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { | |
482 | map_lsapic_id(header, acpi_id, &apic_id); | |
483 | } | |
484 | ||
485 | exit: | |
486 | if (buffer.pointer) | |
487 | kfree(buffer.pointer); | |
488 | return apic_id; | |
489 | } | |
490 | ||
11bf04c4 | 491 | static int get_cpu_id(acpi_handle handle, u32 acpi_id) |
1da177e4 | 492 | { |
4a35a46b | 493 | int i; |
f18c5a08 | 494 | int apic_id = -1; |
1da177e4 | 495 | |
f18c5a08 AS |
496 | apic_id = map_mat_entry(handle, acpi_id); |
497 | if (apic_id == -1) | |
498 | apic_id = map_madt_entry(acpi_id); | |
499 | if (apic_id == -1) | |
500 | return apic_id; | |
1da177e4 | 501 | |
f18c5a08 | 502 | for (i = 0; i < NR_CPUS; ++i) { |
4a35a46b LB |
503 | if (arch_cpu_to_apicid[i] == apic_id) |
504 | return i; | |
1da177e4 LT |
505 | } |
506 | return -1; | |
507 | } | |
508 | #endif | |
509 | ||
510 | /* -------------------------------------------------------------------------- | |
511 | Driver Interface | |
512 | -------------------------------------------------------------------------- */ | |
513 | ||
11bf04c4 | 514 | static int acpi_processor_get_info(struct acpi_processor *pr, unsigned has_uid) |
1da177e4 | 515 | { |
4be44fcd LB |
516 | acpi_status status = 0; |
517 | union acpi_object object = { 0 }; | |
518 | struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; | |
df42baa0 | 519 | int cpu_index; |
4be44fcd | 520 | static int cpu0_initialized; |
1da177e4 | 521 | |
1da177e4 LT |
522 | |
523 | if (!pr) | |
d550d98d | 524 | return -EINVAL; |
1da177e4 LT |
525 | |
526 | if (num_online_cpus() > 1) | |
527 | errata.smp = TRUE; | |
528 | ||
529 | acpi_processor_errata(pr); | |
530 | ||
531 | /* | |
532 | * Check to see if we have bus mastering arbitration control. This | |
533 | * is required for proper C3 usage (to maintain cache coherency). | |
534 | */ | |
cee324b1 | 535 | if (acpi_gbl_FADT.pm2_control_block && acpi_gbl_FADT.pm2_control_length) { |
1da177e4 LT |
536 | pr->flags.bm_control = 1; |
537 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd LB |
538 | "Bus mastering arbitration control present\n")); |
539 | } else | |
1da177e4 | 540 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
4be44fcd | 541 | "No bus mastering arbitration control\n")); |
1da177e4 | 542 | |
11bf04c4 AS |
543 | /* Check if it is a Device with HID and UID */ |
544 | if (has_uid) { | |
545 | unsigned long value; | |
546 | status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID, | |
547 | NULL, &value); | |
548 | if (ACPI_FAILURE(status)) { | |
549 | printk(KERN_ERR PREFIX "Evaluating processor _UID\n"); | |
550 | return -ENODEV; | |
551 | } | |
552 | pr->acpi_id = value; | |
553 | } else { | |
554 | /* | |
555 | * Evalute the processor object. Note that it is common on SMP to | |
556 | * have the first (boot) processor with a valid PBLK address while | |
557 | * all others have a NULL address. | |
558 | */ | |
559 | status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); | |
560 | if (ACPI_FAILURE(status)) { | |
561 | printk(KERN_ERR PREFIX "Evaluating processor object\n"); | |
562 | return -ENODEV; | |
563 | } | |
1da177e4 | 564 | |
11bf04c4 AS |
565 | /* |
566 | * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. | |
567 | * >>> 'acpi_get_processor_id(acpi_id, &id)' in arch/xxx/acpi.c | |
568 | */ | |
569 | pr->acpi_id = object.processor.proc_id; | |
570 | } | |
571 | cpu_index = get_cpu_id(pr->handle, pr->acpi_id); | |
1da177e4 | 572 | |
4be44fcd | 573 | /* Handle UP system running SMP kernel, with no LAPIC in MADT */ |
df42baa0 | 574 | if (!cpu0_initialized && (cpu_index == -1) && |
4be44fcd LB |
575 | (num_online_cpus() == 1)) { |
576 | cpu_index = 0; | |
577 | } | |
578 | ||
579 | cpu0_initialized = 1; | |
580 | ||
581 | pr->id = cpu_index; | |
582 | ||
583 | /* | |
584 | * Extra Processor objects may be enumerated on MP systems with | |
585 | * less than the max # of CPUs. They should be ignored _iff | |
586 | * they are physically not present. | |
587 | */ | |
f18c5a08 | 588 | if (pr->id == -1) { |
4be44fcd LB |
589 | if (ACPI_FAILURE |
590 | (acpi_processor_hotadd_init(pr->handle, &pr->id))) { | |
d550d98d | 591 | return -ENODEV; |
4be44fcd LB |
592 | } |
593 | } | |
1da177e4 LT |
594 | |
595 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, | |
4be44fcd | 596 | pr->acpi_id)); |
1da177e4 LT |
597 | |
598 | if (!object.processor.pblk_address) | |
599 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n")); | |
600 | else if (object.processor.pblk_length != 6) | |
6468463a LB |
601 | printk(KERN_ERR PREFIX "Invalid PBLK length [%d]\n", |
602 | object.processor.pblk_length); | |
1da177e4 LT |
603 | else { |
604 | pr->throttling.address = object.processor.pblk_address; | |
cee324b1 AS |
605 | pr->throttling.duty_offset = acpi_gbl_FADT.duty_offset; |
606 | pr->throttling.duty_width = acpi_gbl_FADT.duty_width; | |
1da177e4 LT |
607 | |
608 | pr->pblk = object.processor.pblk_address; | |
609 | ||
610 | /* | |
611 | * We don't care about error returns - we just try to mark | |
612 | * these reserved so that nobody else is confused into thinking | |
613 | * that this region might be unused.. | |
614 | * | |
615 | * (In particular, allocating the IO range for Cardbus) | |
616 | */ | |
617 | request_region(pr->throttling.address, 6, "ACPI CPU throttle"); | |
618 | } | |
619 | ||
620 | #ifdef CONFIG_CPU_FREQ | |
621 | acpi_processor_ppc_has_changed(pr); | |
622 | #endif | |
623 | acpi_processor_get_throttling_info(pr); | |
624 | acpi_processor_get_limit_info(pr); | |
625 | ||
d550d98d | 626 | return 0; |
1da177e4 LT |
627 | } |
628 | ||
cd8e2b48 VP |
629 | static void *processor_device_array[NR_CPUS]; |
630 | ||
7af8b660 | 631 | static int __cpuinit acpi_processor_start(struct acpi_device *device) |
1da177e4 | 632 | { |
4be44fcd LB |
633 | int result = 0; |
634 | acpi_status status = AE_OK; | |
635 | struct acpi_processor *pr; | |
1da177e4 | 636 | |
1da177e4 LT |
637 | |
638 | pr = acpi_driver_data(device); | |
639 | ||
11bf04c4 | 640 | result = acpi_processor_get_info(pr, device->flags.unique_id); |
1da177e4 LT |
641 | if (result) { |
642 | /* Processor is physically not present */ | |
d550d98d | 643 | return 0; |
1da177e4 LT |
644 | } |
645 | ||
646 | BUG_ON((pr->id >= NR_CPUS) || (pr->id < 0)); | |
647 | ||
cd8e2b48 VP |
648 | /* |
649 | * Buggy BIOS check | |
650 | * ACPI id of processors can be reported wrongly by the BIOS. | |
651 | * Don't trust it blindly | |
652 | */ | |
653 | if (processor_device_array[pr->id] != NULL && | |
50dd0969 | 654 | processor_device_array[pr->id] != device) { |
0eacee58 LB |
655 | printk(KERN_WARNING "BIOS reported wrong ACPI id" |
656 | "for the processor\n"); | |
d550d98d | 657 | return -ENODEV; |
cd8e2b48 | 658 | } |
50dd0969 | 659 | processor_device_array[pr->id] = device; |
cd8e2b48 | 660 | |
1da177e4 LT |
661 | processors[pr->id] = pr; |
662 | ||
663 | result = acpi_processor_add_fs(device); | |
664 | if (result) | |
665 | goto end; | |
666 | ||
667 | status = acpi_install_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, | |
4be44fcd | 668 | acpi_processor_notify, pr); |
1da177e4 | 669 | |
05131ecc VP |
670 | /* _PDC call should be done before doing anything else (if reqd.). */ |
671 | arch_acpi_processor_init_pdc(pr); | |
672 | acpi_processor_set_pdc(pr); | |
673 | ||
1da177e4 LT |
674 | acpi_processor_power_init(pr, device); |
675 | ||
676 | if (pr->flags.throttling) { | |
677 | printk(KERN_INFO PREFIX "%s [%s] (supports", | |
4be44fcd | 678 | acpi_device_name(device), acpi_device_bid(device)); |
1da177e4 LT |
679 | printk(" %d throttling states", pr->throttling.state_count); |
680 | printk(")\n"); | |
681 | } | |
682 | ||
4be44fcd | 683 | end: |
1da177e4 | 684 | |
d550d98d | 685 | return result; |
1da177e4 LT |
686 | } |
687 | ||
4be44fcd | 688 | static void acpi_processor_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 689 | { |
50dd0969 | 690 | struct acpi_processor *pr = data; |
4be44fcd | 691 | struct acpi_device *device = NULL; |
1da177e4 | 692 | |
1da177e4 LT |
693 | |
694 | if (!pr) | |
d550d98d | 695 | return; |
1da177e4 LT |
696 | |
697 | if (acpi_bus_get_device(pr->handle, &device)) | |
d550d98d | 698 | return; |
1da177e4 LT |
699 | |
700 | switch (event) { | |
701 | case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: | |
702 | acpi_processor_ppc_has_changed(pr); | |
14e04fb3 | 703 | acpi_bus_generate_proc_event(device, event, |
4be44fcd | 704 | pr->performance_platform_limit); |
962ce8ca ZR |
705 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
706 | device->dev.bus_id, event, | |
707 | pr->performance_platform_limit); | |
1da177e4 LT |
708 | break; |
709 | case ACPI_PROCESSOR_NOTIFY_POWER: | |
710 | acpi_processor_cst_has_changed(pr); | |
14e04fb3 | 711 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
712 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
713 | device->dev.bus_id, event, 0); | |
1da177e4 | 714 | break; |
01854e69 LY |
715 | case ACPI_PROCESSOR_NOTIFY_THROTTLING: |
716 | acpi_processor_tstate_has_changed(pr); | |
14e04fb3 | 717 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
718 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
719 | device->dev.bus_id, event, 0); | |
1da177e4 LT |
720 | default: |
721 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 722 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
723 | break; |
724 | } | |
725 | ||
d550d98d | 726 | return; |
1da177e4 LT |
727 | } |
728 | ||
729c6ba3 VP |
729 | static int acpi_cpu_soft_notify(struct notifier_block *nfb, |
730 | unsigned long action, void *hcpu) | |
731 | { | |
732 | unsigned int cpu = (unsigned long)hcpu; | |
733 | struct acpi_processor *pr = processors[cpu]; | |
734 | ||
735 | if (action == CPU_ONLINE && pr) { | |
736 | acpi_processor_ppc_has_changed(pr); | |
737 | acpi_processor_cst_has_changed(pr); | |
738 | acpi_processor_tstate_has_changed(pr); | |
739 | } | |
740 | return NOTIFY_OK; | |
741 | } | |
742 | ||
743 | static struct notifier_block acpi_cpu_notifier = | |
744 | { | |
745 | .notifier_call = acpi_cpu_soft_notify, | |
746 | }; | |
747 | ||
4be44fcd | 748 | static int acpi_processor_add(struct acpi_device *device) |
1da177e4 | 749 | { |
4be44fcd | 750 | struct acpi_processor *pr = NULL; |
1da177e4 | 751 | |
1da177e4 LT |
752 | |
753 | if (!device) | |
d550d98d | 754 | return -EINVAL; |
1da177e4 | 755 | |
36bcbec7 | 756 | pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL); |
1da177e4 | 757 | if (!pr) |
d550d98d | 758 | return -ENOMEM; |
1da177e4 LT |
759 | |
760 | pr->handle = device->handle; | |
761 | strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); | |
762 | strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); | |
763 | acpi_driver_data(device) = pr; | |
764 | ||
d550d98d | 765 | return 0; |
1da177e4 LT |
766 | } |
767 | ||
4be44fcd | 768 | static int acpi_processor_remove(struct acpi_device *device, int type) |
1da177e4 | 769 | { |
4be44fcd LB |
770 | acpi_status status = AE_OK; |
771 | struct acpi_processor *pr = NULL; | |
1da177e4 | 772 | |
1da177e4 LT |
773 | |
774 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 775 | return -EINVAL; |
1da177e4 | 776 | |
50dd0969 | 777 | pr = acpi_driver_data(device); |
1da177e4 LT |
778 | |
779 | if (pr->id >= NR_CPUS) { | |
780 | kfree(pr); | |
d550d98d | 781 | return 0; |
1da177e4 LT |
782 | } |
783 | ||
784 | if (type == ACPI_BUS_REMOVAL_EJECT) { | |
785 | if (acpi_processor_handle_eject(pr)) | |
d550d98d | 786 | return -EINVAL; |
1da177e4 LT |
787 | } |
788 | ||
789 | acpi_processor_power_exit(pr, device); | |
790 | ||
791 | status = acpi_remove_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, | |
4be44fcd | 792 | acpi_processor_notify); |
1da177e4 LT |
793 | |
794 | acpi_processor_remove_fs(device); | |
795 | ||
796 | processors[pr->id] = NULL; | |
797 | ||
798 | kfree(pr); | |
799 | ||
d550d98d | 800 | return 0; |
1da177e4 LT |
801 | } |
802 | ||
803 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
804 | /**************************************************************************** | |
805 | * Acpi processor hotplug support * | |
806 | ****************************************************************************/ | |
807 | ||
808 | static int is_processor_present(acpi_handle handle); | |
809 | ||
4be44fcd | 810 | static int is_processor_present(acpi_handle handle) |
1da177e4 | 811 | { |
4be44fcd LB |
812 | acpi_status status; |
813 | unsigned long sta = 0; | |
1da177e4 | 814 | |
1da177e4 LT |
815 | |
816 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
a0bd4ac4 | 817 | if (ACPI_FAILURE(status) || !(sta & ACPI_STA_DEVICE_PRESENT)) { |
a6fc6720 | 818 | ACPI_EXCEPTION((AE_INFO, status, "Processor Device is not present")); |
d550d98d | 819 | return 0; |
1da177e4 | 820 | } |
d550d98d | 821 | return 1; |
1da177e4 LT |
822 | } |
823 | ||
1da177e4 | 824 | static |
4be44fcd | 825 | int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 826 | { |
4be44fcd LB |
827 | acpi_handle phandle; |
828 | struct acpi_device *pdev; | |
829 | struct acpi_processor *pr; | |
1da177e4 | 830 | |
1da177e4 LT |
831 | |
832 | if (acpi_get_parent(handle, &phandle)) { | |
d550d98d | 833 | return -ENODEV; |
1da177e4 LT |
834 | } |
835 | ||
836 | if (acpi_bus_get_device(phandle, &pdev)) { | |
d550d98d | 837 | return -ENODEV; |
1da177e4 LT |
838 | } |
839 | ||
840 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { | |
d550d98d | 841 | return -ENODEV; |
1da177e4 LT |
842 | } |
843 | ||
3fb02738 | 844 | acpi_bus_start(*device); |
1da177e4 LT |
845 | |
846 | pr = acpi_driver_data(*device); | |
847 | if (!pr) | |
d550d98d | 848 | return -ENODEV; |
1da177e4 | 849 | |
4be44fcd | 850 | if ((pr->id >= 0) && (pr->id < NR_CPUS)) { |
f883d9db | 851 | kobject_uevent(&(*device)->dev.kobj, KOBJ_ONLINE); |
1da177e4 | 852 | } |
d550d98d | 853 | return 0; |
1da177e4 LT |
854 | } |
855 | ||
1da177e4 | 856 | static void |
4be44fcd | 857 | acpi_processor_hotplug_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 858 | { |
4be44fcd LB |
859 | struct acpi_processor *pr; |
860 | struct acpi_device *device = NULL; | |
1da177e4 LT |
861 | int result; |
862 | ||
1da177e4 LT |
863 | |
864 | switch (event) { | |
865 | case ACPI_NOTIFY_BUS_CHECK: | |
866 | case ACPI_NOTIFY_DEVICE_CHECK: | |
867 | printk("Processor driver received %s event\n", | |
4be44fcd LB |
868 | (event == ACPI_NOTIFY_BUS_CHECK) ? |
869 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK"); | |
1da177e4 LT |
870 | |
871 | if (!is_processor_present(handle)) | |
872 | break; | |
873 | ||
874 | if (acpi_bus_get_device(handle, &device)) { | |
875 | result = acpi_processor_device_add(handle, &device); | |
876 | if (result) | |
6468463a LB |
877 | printk(KERN_ERR PREFIX |
878 | "Unable to add the device\n"); | |
1da177e4 LT |
879 | break; |
880 | } | |
881 | ||
882 | pr = acpi_driver_data(device); | |
883 | if (!pr) { | |
6468463a | 884 | printk(KERN_ERR PREFIX "Driver data is NULL\n"); |
1da177e4 LT |
885 | break; |
886 | } | |
887 | ||
888 | if (pr->id >= 0 && (pr->id < NR_CPUS)) { | |
f883d9db | 889 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
1da177e4 LT |
890 | break; |
891 | } | |
892 | ||
893 | result = acpi_processor_start(device); | |
4be44fcd | 894 | if ((!result) && ((pr->id >= 0) && (pr->id < NR_CPUS))) { |
f883d9db | 895 | kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); |
1da177e4 | 896 | } else { |
6468463a LB |
897 | printk(KERN_ERR PREFIX "Device [%s] failed to start\n", |
898 | acpi_device_bid(device)); | |
1da177e4 | 899 | } |
4be44fcd | 900 | break; |
1da177e4 | 901 | case ACPI_NOTIFY_EJECT_REQUEST: |
4be44fcd LB |
902 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
903 | "received ACPI_NOTIFY_EJECT_REQUEST\n")); | |
1da177e4 LT |
904 | |
905 | if (acpi_bus_get_device(handle, &device)) { | |
6468463a LB |
906 | printk(KERN_ERR PREFIX |
907 | "Device don't exist, dropping EJECT\n"); | |
1da177e4 LT |
908 | break; |
909 | } | |
910 | pr = acpi_driver_data(device); | |
911 | if (!pr) { | |
6468463a LB |
912 | printk(KERN_ERR PREFIX |
913 | "Driver data is NULL, dropping EJECT\n"); | |
d550d98d | 914 | return; |
1da177e4 LT |
915 | } |
916 | ||
917 | if ((pr->id < NR_CPUS) && (cpu_present(pr->id))) | |
f883d9db | 918 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
1da177e4 LT |
919 | break; |
920 | default: | |
921 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 922 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
923 | break; |
924 | } | |
925 | ||
d550d98d | 926 | return; |
1da177e4 LT |
927 | } |
928 | ||
929 | static acpi_status | |
930 | processor_walk_namespace_cb(acpi_handle handle, | |
4be44fcd | 931 | u32 lvl, void *context, void **rv) |
1da177e4 | 932 | { |
4be44fcd | 933 | acpi_status status; |
1da177e4 | 934 | int *action = context; |
4be44fcd | 935 | acpi_object_type type = 0; |
1da177e4 LT |
936 | |
937 | status = acpi_get_type(handle, &type); | |
938 | if (ACPI_FAILURE(status)) | |
4be44fcd | 939 | return (AE_OK); |
1da177e4 LT |
940 | |
941 | if (type != ACPI_TYPE_PROCESSOR) | |
4be44fcd | 942 | return (AE_OK); |
1da177e4 | 943 | |
4be44fcd | 944 | switch (*action) { |
1da177e4 LT |
945 | case INSTALL_NOTIFY_HANDLER: |
946 | acpi_install_notify_handler(handle, | |
4be44fcd LB |
947 | ACPI_SYSTEM_NOTIFY, |
948 | acpi_processor_hotplug_notify, | |
949 | NULL); | |
1da177e4 LT |
950 | break; |
951 | case UNINSTALL_NOTIFY_HANDLER: | |
952 | acpi_remove_notify_handler(handle, | |
4be44fcd LB |
953 | ACPI_SYSTEM_NOTIFY, |
954 | acpi_processor_hotplug_notify); | |
1da177e4 LT |
955 | break; |
956 | default: | |
957 | break; | |
958 | } | |
959 | ||
4be44fcd | 960 | return (AE_OK); |
1da177e4 LT |
961 | } |
962 | ||
4be44fcd | 963 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 | 964 | { |
1da177e4 LT |
965 | |
966 | if (!is_processor_present(handle)) { | |
d550d98d | 967 | return AE_ERROR; |
1da177e4 LT |
968 | } |
969 | ||
970 | if (acpi_map_lsapic(handle, p_cpu)) | |
d550d98d | 971 | return AE_ERROR; |
1da177e4 LT |
972 | |
973 | if (arch_register_cpu(*p_cpu)) { | |
974 | acpi_unmap_lsapic(*p_cpu); | |
d550d98d | 975 | return AE_ERROR; |
1da177e4 LT |
976 | } |
977 | ||
d550d98d | 978 | return AE_OK; |
1da177e4 LT |
979 | } |
980 | ||
4be44fcd | 981 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 LT |
982 | { |
983 | if (cpu_online(pr->id)) { | |
4be44fcd | 984 | return (-EINVAL); |
1da177e4 LT |
985 | } |
986 | arch_unregister_cpu(pr->id); | |
987 | acpi_unmap_lsapic(pr->id); | |
4be44fcd | 988 | return (0); |
1da177e4 LT |
989 | } |
990 | #else | |
4be44fcd | 991 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 LT |
992 | { |
993 | return AE_ERROR; | |
994 | } | |
4be44fcd | 995 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 | 996 | { |
4be44fcd | 997 | return (-EINVAL); |
1da177e4 LT |
998 | } |
999 | #endif | |
1000 | ||
1da177e4 LT |
1001 | static |
1002 | void acpi_processor_install_hotplug_notify(void) | |
1003 | { | |
1004 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
1005 | int action = INSTALL_NOTIFY_HANDLER; | |
1006 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
1007 | ACPI_ROOT_OBJECT, |
1008 | ACPI_UINT32_MAX, | |
1009 | processor_walk_namespace_cb, &action, NULL); | |
1da177e4 | 1010 | #endif |
729c6ba3 | 1011 | register_hotcpu_notifier(&acpi_cpu_notifier); |
1da177e4 LT |
1012 | } |
1013 | ||
1da177e4 LT |
1014 | static |
1015 | void acpi_processor_uninstall_hotplug_notify(void) | |
1016 | { | |
1017 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
1018 | int action = UNINSTALL_NOTIFY_HANDLER; | |
1019 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
1020 | ACPI_ROOT_OBJECT, |
1021 | ACPI_UINT32_MAX, | |
1022 | processor_walk_namespace_cb, &action, NULL); | |
1da177e4 | 1023 | #endif |
729c6ba3 | 1024 | unregister_hotcpu_notifier(&acpi_cpu_notifier); |
1da177e4 LT |
1025 | } |
1026 | ||
1027 | /* | |
1028 | * We keep the driver loaded even when ACPI is not running. | |
1029 | * This is needed for the powernow-k8 driver, that works even without | |
1030 | * ACPI, but needs symbols from this driver | |
1031 | */ | |
1032 | ||
4be44fcd | 1033 | static int __init acpi_processor_init(void) |
1da177e4 | 1034 | { |
4be44fcd | 1035 | int result = 0; |
1da177e4 | 1036 | |
1da177e4 LT |
1037 | |
1038 | memset(&processors, 0, sizeof(processors)); | |
1039 | memset(&errata, 0, sizeof(errata)); | |
1040 | ||
f18c5a08 AS |
1041 | #ifdef CONFIG_SMP |
1042 | if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0, | |
1043 | (struct acpi_table_header **)&madt))) | |
70c0846e | 1044 | madt = NULL; |
f18c5a08 AS |
1045 | #endif |
1046 | ||
1da177e4 LT |
1047 | acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
1048 | if (!acpi_processor_dir) | |
83822fc9 | 1049 | return -ENOMEM; |
1da177e4 LT |
1050 | acpi_processor_dir->owner = THIS_MODULE; |
1051 | ||
1052 | result = acpi_bus_register_driver(&acpi_processor_driver); | |
1053 | if (result < 0) { | |
1054 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); | |
83822fc9 | 1055 | return result; |
1da177e4 LT |
1056 | } |
1057 | ||
1058 | acpi_processor_install_hotplug_notify(); | |
1059 | ||
1060 | acpi_thermal_cpufreq_init(); | |
1061 | ||
1062 | acpi_processor_ppc_init(); | |
1063 | ||
d550d98d | 1064 | return 0; |
1da177e4 LT |
1065 | } |
1066 | ||
4be44fcd | 1067 | static void __exit acpi_processor_exit(void) |
1da177e4 | 1068 | { |
1da177e4 LT |
1069 | |
1070 | acpi_processor_ppc_exit(); | |
1071 | ||
1072 | acpi_thermal_cpufreq_exit(); | |
1073 | ||
1074 | acpi_processor_uninstall_hotplug_notify(); | |
1075 | ||
1076 | acpi_bus_unregister_driver(&acpi_processor_driver); | |
1077 | ||
1078 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); | |
1079 | ||
d550d98d | 1080 | return; |
1da177e4 LT |
1081 | } |
1082 | ||
1da177e4 LT |
1083 | module_init(acpi_processor_init); |
1084 | module_exit(acpi_processor_exit); | |
1085 | ||
1086 | EXPORT_SYMBOL(acpi_processor_set_thermal_limit); | |
1087 | ||
1088 | MODULE_ALIAS("processor"); |