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1b8873a0 JI |
1 | #undef DEBUG |
2 | ||
3 | /* | |
4 | * ARM performance counter support. | |
5 | * | |
6 | * Copyright (C) 2009 picoChip Designs, Ltd., Jamie Iles | |
7 | * | |
796d1295 JP |
8 | * ARMv7 support: Jean Pihet <jpihet@mvista.com> |
9 | * 2010 (c) MontaVista Software, LLC. | |
10 | * | |
1b8873a0 JI |
11 | * This code is based on the sparc64 perf event code, which is in turn based |
12 | * on the x86 code. Callchain code is based on the ARM OProfile backtrace | |
13 | * code. | |
14 | */ | |
15 | #define pr_fmt(fmt) "hw perfevents: " fmt | |
16 | ||
17 | #include <linux/interrupt.h> | |
18 | #include <linux/kernel.h> | |
181193f3 | 19 | #include <linux/module.h> |
1b8873a0 | 20 | #include <linux/perf_event.h> |
49c006b9 | 21 | #include <linux/platform_device.h> |
1b8873a0 JI |
22 | #include <linux/spinlock.h> |
23 | #include <linux/uaccess.h> | |
24 | ||
25 | #include <asm/cputype.h> | |
26 | #include <asm/irq.h> | |
27 | #include <asm/irq_regs.h> | |
28 | #include <asm/pmu.h> | |
29 | #include <asm/stacktrace.h> | |
30 | ||
49c006b9 | 31 | static struct platform_device *pmu_device; |
1b8873a0 JI |
32 | |
33 | /* | |
34 | * Hardware lock to serialize accesses to PMU registers. Needed for the | |
35 | * read/modify/write sequences. | |
36 | */ | |
37 | DEFINE_SPINLOCK(pmu_lock); | |
38 | ||
39 | /* | |
40 | * ARMv6 supports a maximum of 3 events, starting from index 1. If we add | |
41 | * another platform that supports more, we need to increase this to be the | |
42 | * largest of all platforms. | |
796d1295 JP |
43 | * |
44 | * ARMv7 supports up to 32 events: | |
45 | * cycle counter CCNT + 31 events counters CNT0..30. | |
46 | * Cortex-A8 has 1+4 counters, Cortex-A9 has 1+6 counters. | |
1b8873a0 | 47 | */ |
796d1295 | 48 | #define ARMPMU_MAX_HWEVENTS 33 |
1b8873a0 JI |
49 | |
50 | /* The events for a given CPU. */ | |
51 | struct cpu_hw_events { | |
52 | /* | |
53 | * The events that are active on the CPU for the given index. Index 0 | |
54 | * is reserved. | |
55 | */ | |
56 | struct perf_event *events[ARMPMU_MAX_HWEVENTS]; | |
57 | ||
58 | /* | |
59 | * A 1 bit for an index indicates that the counter is being used for | |
60 | * an event. A 0 means that the counter can be used. | |
61 | */ | |
62 | unsigned long used_mask[BITS_TO_LONGS(ARMPMU_MAX_HWEVENTS)]; | |
63 | ||
64 | /* | |
65 | * A 1 bit for an index indicates that the counter is actively being | |
66 | * used. | |
67 | */ | |
68 | unsigned long active_mask[BITS_TO_LONGS(ARMPMU_MAX_HWEVENTS)]; | |
69 | }; | |
70 | DEFINE_PER_CPU(struct cpu_hw_events, cpu_hw_events); | |
71 | ||
181193f3 WD |
72 | /* PMU names. */ |
73 | static const char *arm_pmu_names[] = { | |
74 | [ARM_PERF_PMU_ID_XSCALE1] = "xscale1", | |
75 | [ARM_PERF_PMU_ID_XSCALE2] = "xscale2", | |
76 | [ARM_PERF_PMU_ID_V6] = "v6", | |
77 | [ARM_PERF_PMU_ID_V6MP] = "v6mpcore", | |
78 | [ARM_PERF_PMU_ID_CA8] = "ARMv7 Cortex-A8", | |
79 | [ARM_PERF_PMU_ID_CA9] = "ARMv7 Cortex-A9", | |
80 | }; | |
81 | ||
1b8873a0 | 82 | struct arm_pmu { |
181193f3 | 83 | enum arm_perf_pmu_ids id; |
1b8873a0 JI |
84 | irqreturn_t (*handle_irq)(int irq_num, void *dev); |
85 | void (*enable)(struct hw_perf_event *evt, int idx); | |
86 | void (*disable)(struct hw_perf_event *evt, int idx); | |
87 | int (*event_map)(int evt); | |
88 | u64 (*raw_event)(u64); | |
89 | int (*get_event_idx)(struct cpu_hw_events *cpuc, | |
90 | struct hw_perf_event *hwc); | |
91 | u32 (*read_counter)(int idx); | |
92 | void (*write_counter)(int idx, u32 val); | |
93 | void (*start)(void); | |
94 | void (*stop)(void); | |
95 | int num_events; | |
96 | u64 max_period; | |
97 | }; | |
98 | ||
99 | /* Set at runtime when we know what CPU type we are. */ | |
100 | static const struct arm_pmu *armpmu; | |
101 | ||
181193f3 WD |
102 | enum arm_perf_pmu_ids |
103 | armpmu_get_pmu_id(void) | |
104 | { | |
105 | int id = -ENODEV; | |
106 | ||
107 | if (armpmu != NULL) | |
108 | id = armpmu->id; | |
109 | ||
110 | return id; | |
111 | } | |
112 | EXPORT_SYMBOL_GPL(armpmu_get_pmu_id); | |
113 | ||
929f5199 WD |
114 | int |
115 | armpmu_get_max_events(void) | |
116 | { | |
117 | int max_events = 0; | |
118 | ||
119 | if (armpmu != NULL) | |
120 | max_events = armpmu->num_events; | |
121 | ||
122 | return max_events; | |
123 | } | |
124 | EXPORT_SYMBOL_GPL(armpmu_get_max_events); | |
125 | ||
1b8873a0 JI |
126 | #define HW_OP_UNSUPPORTED 0xFFFF |
127 | ||
128 | #define C(_x) \ | |
129 | PERF_COUNT_HW_CACHE_##_x | |
130 | ||
131 | #define CACHE_OP_UNSUPPORTED 0xFFFF | |
132 | ||
133 | static unsigned armpmu_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] | |
134 | [PERF_COUNT_HW_CACHE_OP_MAX] | |
135 | [PERF_COUNT_HW_CACHE_RESULT_MAX]; | |
136 | ||
137 | static int | |
138 | armpmu_map_cache_event(u64 config) | |
139 | { | |
140 | unsigned int cache_type, cache_op, cache_result, ret; | |
141 | ||
142 | cache_type = (config >> 0) & 0xff; | |
143 | if (cache_type >= PERF_COUNT_HW_CACHE_MAX) | |
144 | return -EINVAL; | |
145 | ||
146 | cache_op = (config >> 8) & 0xff; | |
147 | if (cache_op >= PERF_COUNT_HW_CACHE_OP_MAX) | |
148 | return -EINVAL; | |
149 | ||
150 | cache_result = (config >> 16) & 0xff; | |
151 | if (cache_result >= PERF_COUNT_HW_CACHE_RESULT_MAX) | |
152 | return -EINVAL; | |
153 | ||
154 | ret = (int)armpmu_perf_cache_map[cache_type][cache_op][cache_result]; | |
155 | ||
156 | if (ret == CACHE_OP_UNSUPPORTED) | |
157 | return -ENOENT; | |
158 | ||
159 | return ret; | |
160 | } | |
161 | ||
162 | static int | |
163 | armpmu_event_set_period(struct perf_event *event, | |
164 | struct hw_perf_event *hwc, | |
165 | int idx) | |
166 | { | |
167 | s64 left = atomic64_read(&hwc->period_left); | |
168 | s64 period = hwc->sample_period; | |
169 | int ret = 0; | |
170 | ||
171 | if (unlikely(left <= -period)) { | |
172 | left = period; | |
173 | atomic64_set(&hwc->period_left, left); | |
174 | hwc->last_period = period; | |
175 | ret = 1; | |
176 | } | |
177 | ||
178 | if (unlikely(left <= 0)) { | |
179 | left += period; | |
180 | atomic64_set(&hwc->period_left, left); | |
181 | hwc->last_period = period; | |
182 | ret = 1; | |
183 | } | |
184 | ||
185 | if (left > (s64)armpmu->max_period) | |
186 | left = armpmu->max_period; | |
187 | ||
188 | atomic64_set(&hwc->prev_count, (u64)-left); | |
189 | ||
190 | armpmu->write_counter(idx, (u64)(-left) & 0xffffffff); | |
191 | ||
192 | perf_event_update_userpage(event); | |
193 | ||
194 | return ret; | |
195 | } | |
196 | ||
197 | static u64 | |
198 | armpmu_event_update(struct perf_event *event, | |
199 | struct hw_perf_event *hwc, | |
200 | int idx) | |
201 | { | |
202 | int shift = 64 - 32; | |
203 | s64 prev_raw_count, new_raw_count; | |
204 | s64 delta; | |
205 | ||
206 | again: | |
207 | prev_raw_count = atomic64_read(&hwc->prev_count); | |
208 | new_raw_count = armpmu->read_counter(idx); | |
209 | ||
210 | if (atomic64_cmpxchg(&hwc->prev_count, prev_raw_count, | |
211 | new_raw_count) != prev_raw_count) | |
212 | goto again; | |
213 | ||
214 | delta = (new_raw_count << shift) - (prev_raw_count << shift); | |
215 | delta >>= shift; | |
216 | ||
217 | atomic64_add(delta, &event->count); | |
218 | atomic64_sub(delta, &hwc->period_left); | |
219 | ||
220 | return new_raw_count; | |
221 | } | |
222 | ||
223 | static void | |
224 | armpmu_disable(struct perf_event *event) | |
225 | { | |
226 | struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events); | |
227 | struct hw_perf_event *hwc = &event->hw; | |
228 | int idx = hwc->idx; | |
229 | ||
230 | WARN_ON(idx < 0); | |
231 | ||
232 | clear_bit(idx, cpuc->active_mask); | |
233 | armpmu->disable(hwc, idx); | |
234 | ||
235 | barrier(); | |
236 | ||
237 | armpmu_event_update(event, hwc, idx); | |
238 | cpuc->events[idx] = NULL; | |
239 | clear_bit(idx, cpuc->used_mask); | |
240 | ||
241 | perf_event_update_userpage(event); | |
242 | } | |
243 | ||
244 | static void | |
245 | armpmu_read(struct perf_event *event) | |
246 | { | |
247 | struct hw_perf_event *hwc = &event->hw; | |
248 | ||
249 | /* Don't read disabled counters! */ | |
250 | if (hwc->idx < 0) | |
251 | return; | |
252 | ||
253 | armpmu_event_update(event, hwc, hwc->idx); | |
254 | } | |
255 | ||
256 | static void | |
257 | armpmu_unthrottle(struct perf_event *event) | |
258 | { | |
259 | struct hw_perf_event *hwc = &event->hw; | |
260 | ||
261 | /* | |
262 | * Set the period again. Some counters can't be stopped, so when we | |
263 | * were throttled we simply disabled the IRQ source and the counter | |
264 | * may have been left counting. If we don't do this step then we may | |
265 | * get an interrupt too soon or *way* too late if the overflow has | |
266 | * happened since disabling. | |
267 | */ | |
268 | armpmu_event_set_period(event, hwc, hwc->idx); | |
269 | armpmu->enable(hwc, hwc->idx); | |
270 | } | |
271 | ||
272 | static int | |
273 | armpmu_enable(struct perf_event *event) | |
274 | { | |
275 | struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events); | |
276 | struct hw_perf_event *hwc = &event->hw; | |
277 | int idx; | |
278 | int err = 0; | |
279 | ||
280 | /* If we don't have a space for the counter then finish early. */ | |
281 | idx = armpmu->get_event_idx(cpuc, hwc); | |
282 | if (idx < 0) { | |
283 | err = idx; | |
284 | goto out; | |
285 | } | |
286 | ||
287 | /* | |
288 | * If there is an event in the counter we are going to use then make | |
289 | * sure it is disabled. | |
290 | */ | |
291 | event->hw.idx = idx; | |
292 | armpmu->disable(hwc, idx); | |
293 | cpuc->events[idx] = event; | |
294 | set_bit(idx, cpuc->active_mask); | |
295 | ||
296 | /* Set the period for the event. */ | |
297 | armpmu_event_set_period(event, hwc, idx); | |
298 | ||
299 | /* Enable the event. */ | |
300 | armpmu->enable(hwc, idx); | |
301 | ||
302 | /* Propagate our changes to the userspace mapping. */ | |
303 | perf_event_update_userpage(event); | |
304 | ||
305 | out: | |
306 | return err; | |
307 | } | |
308 | ||
309 | static struct pmu pmu = { | |
310 | .enable = armpmu_enable, | |
311 | .disable = armpmu_disable, | |
312 | .unthrottle = armpmu_unthrottle, | |
313 | .read = armpmu_read, | |
314 | }; | |
315 | ||
316 | static int | |
317 | validate_event(struct cpu_hw_events *cpuc, | |
318 | struct perf_event *event) | |
319 | { | |
320 | struct hw_perf_event fake_event = event->hw; | |
321 | ||
322 | if (event->pmu && event->pmu != &pmu) | |
323 | return 0; | |
324 | ||
325 | return armpmu->get_event_idx(cpuc, &fake_event) >= 0; | |
326 | } | |
327 | ||
328 | static int | |
329 | validate_group(struct perf_event *event) | |
330 | { | |
331 | struct perf_event *sibling, *leader = event->group_leader; | |
332 | struct cpu_hw_events fake_pmu; | |
333 | ||
334 | memset(&fake_pmu, 0, sizeof(fake_pmu)); | |
335 | ||
336 | if (!validate_event(&fake_pmu, leader)) | |
337 | return -ENOSPC; | |
338 | ||
339 | list_for_each_entry(sibling, &leader->sibling_list, group_entry) { | |
340 | if (!validate_event(&fake_pmu, sibling)) | |
341 | return -ENOSPC; | |
342 | } | |
343 | ||
344 | if (!validate_event(&fake_pmu, event)) | |
345 | return -ENOSPC; | |
346 | ||
347 | return 0; | |
348 | } | |
349 | ||
350 | static int | |
351 | armpmu_reserve_hardware(void) | |
352 | { | |
49c006b9 | 353 | int i, err = -ENODEV, irq; |
1b8873a0 | 354 | |
49c006b9 WD |
355 | pmu_device = reserve_pmu(ARM_PMU_DEVICE_CPU); |
356 | if (IS_ERR(pmu_device)) { | |
1b8873a0 | 357 | pr_warning("unable to reserve pmu\n"); |
49c006b9 | 358 | return PTR_ERR(pmu_device); |
1b8873a0 JI |
359 | } |
360 | ||
49c006b9 | 361 | init_pmu(ARM_PMU_DEVICE_CPU); |
1b8873a0 | 362 | |
49c006b9 | 363 | if (pmu_device->num_resources < 1) { |
1b8873a0 JI |
364 | pr_err("no irqs for PMUs defined\n"); |
365 | return -ENODEV; | |
366 | } | |
367 | ||
49c006b9 WD |
368 | for (i = 0; i < pmu_device->num_resources; ++i) { |
369 | irq = platform_get_irq(pmu_device, i); | |
370 | if (irq < 0) | |
371 | continue; | |
372 | ||
373 | err = request_irq(irq, armpmu->handle_irq, | |
ddee87f2 WD |
374 | IRQF_DISABLED | IRQF_NOBALANCING, |
375 | "armpmu", NULL); | |
1b8873a0 | 376 | if (err) { |
49c006b9 WD |
377 | pr_warning("unable to request IRQ%d for ARM perf " |
378 | "counters\n", irq); | |
1b8873a0 JI |
379 | break; |
380 | } | |
381 | } | |
382 | ||
383 | if (err) { | |
49c006b9 WD |
384 | for (i = i - 1; i >= 0; --i) { |
385 | irq = platform_get_irq(pmu_device, i); | |
386 | if (irq >= 0) | |
387 | free_irq(irq, NULL); | |
388 | } | |
389 | release_pmu(pmu_device); | |
390 | pmu_device = NULL; | |
1b8873a0 JI |
391 | } |
392 | ||
393 | return err; | |
394 | } | |
395 | ||
396 | static void | |
397 | armpmu_release_hardware(void) | |
398 | { | |
49c006b9 | 399 | int i, irq; |
1b8873a0 | 400 | |
49c006b9 WD |
401 | for (i = pmu_device->num_resources - 1; i >= 0; --i) { |
402 | irq = platform_get_irq(pmu_device, i); | |
403 | if (irq >= 0) | |
404 | free_irq(irq, NULL); | |
405 | } | |
1b8873a0 JI |
406 | armpmu->stop(); |
407 | ||
49c006b9 WD |
408 | release_pmu(pmu_device); |
409 | pmu_device = NULL; | |
1b8873a0 JI |
410 | } |
411 | ||
412 | static atomic_t active_events = ATOMIC_INIT(0); | |
413 | static DEFINE_MUTEX(pmu_reserve_mutex); | |
414 | ||
415 | static void | |
416 | hw_perf_event_destroy(struct perf_event *event) | |
417 | { | |
418 | if (atomic_dec_and_mutex_lock(&active_events, &pmu_reserve_mutex)) { | |
419 | armpmu_release_hardware(); | |
420 | mutex_unlock(&pmu_reserve_mutex); | |
421 | } | |
422 | } | |
423 | ||
424 | static int | |
425 | __hw_perf_event_init(struct perf_event *event) | |
426 | { | |
427 | struct hw_perf_event *hwc = &event->hw; | |
428 | int mapping, err; | |
429 | ||
430 | /* Decode the generic type into an ARM event identifier. */ | |
431 | if (PERF_TYPE_HARDWARE == event->attr.type) { | |
432 | mapping = armpmu->event_map(event->attr.config); | |
433 | } else if (PERF_TYPE_HW_CACHE == event->attr.type) { | |
434 | mapping = armpmu_map_cache_event(event->attr.config); | |
435 | } else if (PERF_TYPE_RAW == event->attr.type) { | |
436 | mapping = armpmu->raw_event(event->attr.config); | |
437 | } else { | |
438 | pr_debug("event type %x not supported\n", event->attr.type); | |
439 | return -EOPNOTSUPP; | |
440 | } | |
441 | ||
442 | if (mapping < 0) { | |
443 | pr_debug("event %x:%llx not supported\n", event->attr.type, | |
444 | event->attr.config); | |
445 | return mapping; | |
446 | } | |
447 | ||
448 | /* | |
449 | * Check whether we need to exclude the counter from certain modes. | |
450 | * The ARM performance counters are on all of the time so if someone | |
451 | * has asked us for some excludes then we have to fail. | |
452 | */ | |
453 | if (event->attr.exclude_kernel || event->attr.exclude_user || | |
454 | event->attr.exclude_hv || event->attr.exclude_idle) { | |
455 | pr_debug("ARM performance counters do not support " | |
456 | "mode exclusion\n"); | |
457 | return -EPERM; | |
458 | } | |
459 | ||
460 | /* | |
461 | * We don't assign an index until we actually place the event onto | |
462 | * hardware. Use -1 to signify that we haven't decided where to put it | |
463 | * yet. For SMP systems, each core has it's own PMU so we can't do any | |
464 | * clever allocation or constraints checking at this point. | |
465 | */ | |
466 | hwc->idx = -1; | |
467 | ||
468 | /* | |
469 | * Store the event encoding into the config_base field. config and | |
470 | * event_base are unused as the only 2 things we need to know are | |
471 | * the event mapping and the counter to use. The counter to use is | |
472 | * also the indx and the config_base is the event type. | |
473 | */ | |
474 | hwc->config_base = (unsigned long)mapping; | |
475 | hwc->config = 0; | |
476 | hwc->event_base = 0; | |
477 | ||
478 | if (!hwc->sample_period) { | |
479 | hwc->sample_period = armpmu->max_period; | |
480 | hwc->last_period = hwc->sample_period; | |
481 | atomic64_set(&hwc->period_left, hwc->sample_period); | |
482 | } | |
483 | ||
484 | err = 0; | |
485 | if (event->group_leader != event) { | |
486 | err = validate_group(event); | |
487 | if (err) | |
488 | return -EINVAL; | |
489 | } | |
490 | ||
491 | return err; | |
492 | } | |
493 | ||
494 | const struct pmu * | |
495 | hw_perf_event_init(struct perf_event *event) | |
496 | { | |
497 | int err = 0; | |
498 | ||
499 | if (!armpmu) | |
500 | return ERR_PTR(-ENODEV); | |
501 | ||
502 | event->destroy = hw_perf_event_destroy; | |
503 | ||
504 | if (!atomic_inc_not_zero(&active_events)) { | |
505 | if (atomic_read(&active_events) > perf_max_events) { | |
506 | atomic_dec(&active_events); | |
507 | return ERR_PTR(-ENOSPC); | |
508 | } | |
509 | ||
510 | mutex_lock(&pmu_reserve_mutex); | |
511 | if (atomic_read(&active_events) == 0) { | |
512 | err = armpmu_reserve_hardware(); | |
513 | } | |
514 | ||
515 | if (!err) | |
516 | atomic_inc(&active_events); | |
517 | mutex_unlock(&pmu_reserve_mutex); | |
518 | } | |
519 | ||
520 | if (err) | |
521 | return ERR_PTR(err); | |
522 | ||
523 | err = __hw_perf_event_init(event); | |
524 | if (err) | |
525 | hw_perf_event_destroy(event); | |
526 | ||
527 | return err ? ERR_PTR(err) : &pmu; | |
528 | } | |
529 | ||
530 | void | |
531 | hw_perf_enable(void) | |
532 | { | |
533 | /* Enable all of the perf events on hardware. */ | |
534 | int idx; | |
535 | struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events); | |
536 | ||
537 | if (!armpmu) | |
538 | return; | |
539 | ||
540 | for (idx = 0; idx <= armpmu->num_events; ++idx) { | |
541 | struct perf_event *event = cpuc->events[idx]; | |
542 | ||
543 | if (!event) | |
544 | continue; | |
545 | ||
546 | armpmu->enable(&event->hw, idx); | |
547 | } | |
548 | ||
549 | armpmu->start(); | |
550 | } | |
551 | ||
552 | void | |
553 | hw_perf_disable(void) | |
554 | { | |
555 | if (armpmu) | |
556 | armpmu->stop(); | |
557 | } | |
558 | ||
559 | /* | |
560 | * ARMv6 Performance counter handling code. | |
561 | * | |
562 | * ARMv6 has 2 configurable performance counters and a single cycle counter. | |
563 | * They all share a single reset bit but can be written to zero so we can use | |
564 | * that for a reset. | |
565 | * | |
566 | * The counters can't be individually enabled or disabled so when we remove | |
567 | * one event and replace it with another we could get spurious counts from the | |
568 | * wrong event. However, we can take advantage of the fact that the | |
569 | * performance counters can export events to the event bus, and the event bus | |
570 | * itself can be monitored. This requires that we *don't* export the events to | |
571 | * the event bus. The procedure for disabling a configurable counter is: | |
572 | * - change the counter to count the ETMEXTOUT[0] signal (0x20). This | |
573 | * effectively stops the counter from counting. | |
574 | * - disable the counter's interrupt generation (each counter has it's | |
575 | * own interrupt enable bit). | |
576 | * Once stopped, the counter value can be written as 0 to reset. | |
577 | * | |
578 | * To enable a counter: | |
579 | * - enable the counter's interrupt generation. | |
580 | * - set the new event type. | |
581 | * | |
582 | * Note: the dedicated cycle counter only counts cycles and can't be | |
583 | * enabled/disabled independently of the others. When we want to disable the | |
584 | * cycle counter, we have to just disable the interrupt reporting and start | |
585 | * ignoring that counter. When re-enabling, we have to reset the value and | |
586 | * enable the interrupt. | |
587 | */ | |
588 | ||
589 | enum armv6_perf_types { | |
590 | ARMV6_PERFCTR_ICACHE_MISS = 0x0, | |
591 | ARMV6_PERFCTR_IBUF_STALL = 0x1, | |
592 | ARMV6_PERFCTR_DDEP_STALL = 0x2, | |
593 | ARMV6_PERFCTR_ITLB_MISS = 0x3, | |
594 | ARMV6_PERFCTR_DTLB_MISS = 0x4, | |
595 | ARMV6_PERFCTR_BR_EXEC = 0x5, | |
596 | ARMV6_PERFCTR_BR_MISPREDICT = 0x6, | |
597 | ARMV6_PERFCTR_INSTR_EXEC = 0x7, | |
598 | ARMV6_PERFCTR_DCACHE_HIT = 0x9, | |
599 | ARMV6_PERFCTR_DCACHE_ACCESS = 0xA, | |
600 | ARMV6_PERFCTR_DCACHE_MISS = 0xB, | |
601 | ARMV6_PERFCTR_DCACHE_WBACK = 0xC, | |
602 | ARMV6_PERFCTR_SW_PC_CHANGE = 0xD, | |
603 | ARMV6_PERFCTR_MAIN_TLB_MISS = 0xF, | |
604 | ARMV6_PERFCTR_EXPL_D_ACCESS = 0x10, | |
605 | ARMV6_PERFCTR_LSU_FULL_STALL = 0x11, | |
606 | ARMV6_PERFCTR_WBUF_DRAINED = 0x12, | |
607 | ARMV6_PERFCTR_CPU_CYCLES = 0xFF, | |
608 | ARMV6_PERFCTR_NOP = 0x20, | |
609 | }; | |
610 | ||
611 | enum armv6_counters { | |
612 | ARMV6_CYCLE_COUNTER = 1, | |
613 | ARMV6_COUNTER0, | |
614 | ARMV6_COUNTER1, | |
615 | }; | |
616 | ||
617 | /* | |
618 | * The hardware events that we support. We do support cache operations but | |
619 | * we have harvard caches and no way to combine instruction and data | |
620 | * accesses/misses in hardware. | |
621 | */ | |
622 | static const unsigned armv6_perf_map[PERF_COUNT_HW_MAX] = { | |
623 | [PERF_COUNT_HW_CPU_CYCLES] = ARMV6_PERFCTR_CPU_CYCLES, | |
624 | [PERF_COUNT_HW_INSTRUCTIONS] = ARMV6_PERFCTR_INSTR_EXEC, | |
625 | [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED, | |
626 | [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED, | |
627 | [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV6_PERFCTR_BR_EXEC, | |
628 | [PERF_COUNT_HW_BRANCH_MISSES] = ARMV6_PERFCTR_BR_MISPREDICT, | |
629 | [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED, | |
630 | }; | |
631 | ||
632 | static const unsigned armv6_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] | |
633 | [PERF_COUNT_HW_CACHE_OP_MAX] | |
634 | [PERF_COUNT_HW_CACHE_RESULT_MAX] = { | |
635 | [C(L1D)] = { | |
636 | /* | |
637 | * The performance counters don't differentiate between read | |
638 | * and write accesses/misses so this isn't strictly correct, | |
639 | * but it's the best we can do. Writes and reads get | |
640 | * combined. | |
641 | */ | |
642 | [C(OP_READ)] = { | |
643 | [C(RESULT_ACCESS)] = ARMV6_PERFCTR_DCACHE_ACCESS, | |
644 | [C(RESULT_MISS)] = ARMV6_PERFCTR_DCACHE_MISS, | |
645 | }, | |
646 | [C(OP_WRITE)] = { | |
647 | [C(RESULT_ACCESS)] = ARMV6_PERFCTR_DCACHE_ACCESS, | |
648 | [C(RESULT_MISS)] = ARMV6_PERFCTR_DCACHE_MISS, | |
649 | }, | |
650 | [C(OP_PREFETCH)] = { | |
651 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
652 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
653 | }, | |
654 | }, | |
655 | [C(L1I)] = { | |
656 | [C(OP_READ)] = { | |
657 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
658 | [C(RESULT_MISS)] = ARMV6_PERFCTR_ICACHE_MISS, | |
659 | }, | |
660 | [C(OP_WRITE)] = { | |
661 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
662 | [C(RESULT_MISS)] = ARMV6_PERFCTR_ICACHE_MISS, | |
663 | }, | |
664 | [C(OP_PREFETCH)] = { | |
665 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
666 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
667 | }, | |
668 | }, | |
669 | [C(LL)] = { | |
670 | [C(OP_READ)] = { | |
671 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
672 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
673 | }, | |
674 | [C(OP_WRITE)] = { | |
675 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
676 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
677 | }, | |
678 | [C(OP_PREFETCH)] = { | |
679 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
680 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
681 | }, | |
682 | }, | |
683 | [C(DTLB)] = { | |
684 | /* | |
685 | * The ARM performance counters can count micro DTLB misses, | |
686 | * micro ITLB misses and main TLB misses. There isn't an event | |
687 | * for TLB misses, so use the micro misses here and if users | |
688 | * want the main TLB misses they can use a raw counter. | |
689 | */ | |
690 | [C(OP_READ)] = { | |
691 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
692 | [C(RESULT_MISS)] = ARMV6_PERFCTR_DTLB_MISS, | |
693 | }, | |
694 | [C(OP_WRITE)] = { | |
695 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
696 | [C(RESULT_MISS)] = ARMV6_PERFCTR_DTLB_MISS, | |
697 | }, | |
698 | [C(OP_PREFETCH)] = { | |
699 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
700 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
701 | }, | |
702 | }, | |
703 | [C(ITLB)] = { | |
704 | [C(OP_READ)] = { | |
705 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
706 | [C(RESULT_MISS)] = ARMV6_PERFCTR_ITLB_MISS, | |
707 | }, | |
708 | [C(OP_WRITE)] = { | |
709 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
710 | [C(RESULT_MISS)] = ARMV6_PERFCTR_ITLB_MISS, | |
711 | }, | |
712 | [C(OP_PREFETCH)] = { | |
713 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
714 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
715 | }, | |
716 | }, | |
717 | [C(BPU)] = { | |
718 | [C(OP_READ)] = { | |
719 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
720 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
721 | }, | |
722 | [C(OP_WRITE)] = { | |
723 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
724 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
725 | }, | |
726 | [C(OP_PREFETCH)] = { | |
727 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
728 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
729 | }, | |
730 | }, | |
731 | }; | |
732 | ||
733 | enum armv6mpcore_perf_types { | |
734 | ARMV6MPCORE_PERFCTR_ICACHE_MISS = 0x0, | |
735 | ARMV6MPCORE_PERFCTR_IBUF_STALL = 0x1, | |
736 | ARMV6MPCORE_PERFCTR_DDEP_STALL = 0x2, | |
737 | ARMV6MPCORE_PERFCTR_ITLB_MISS = 0x3, | |
738 | ARMV6MPCORE_PERFCTR_DTLB_MISS = 0x4, | |
739 | ARMV6MPCORE_PERFCTR_BR_EXEC = 0x5, | |
740 | ARMV6MPCORE_PERFCTR_BR_NOTPREDICT = 0x6, | |
741 | ARMV6MPCORE_PERFCTR_BR_MISPREDICT = 0x7, | |
742 | ARMV6MPCORE_PERFCTR_INSTR_EXEC = 0x8, | |
743 | ARMV6MPCORE_PERFCTR_DCACHE_RDACCESS = 0xA, | |
744 | ARMV6MPCORE_PERFCTR_DCACHE_RDMISS = 0xB, | |
745 | ARMV6MPCORE_PERFCTR_DCACHE_WRACCESS = 0xC, | |
746 | ARMV6MPCORE_PERFCTR_DCACHE_WRMISS = 0xD, | |
747 | ARMV6MPCORE_PERFCTR_DCACHE_EVICTION = 0xE, | |
748 | ARMV6MPCORE_PERFCTR_SW_PC_CHANGE = 0xF, | |
749 | ARMV6MPCORE_PERFCTR_MAIN_TLB_MISS = 0x10, | |
750 | ARMV6MPCORE_PERFCTR_EXPL_MEM_ACCESS = 0x11, | |
751 | ARMV6MPCORE_PERFCTR_LSU_FULL_STALL = 0x12, | |
752 | ARMV6MPCORE_PERFCTR_WBUF_DRAINED = 0x13, | |
753 | ARMV6MPCORE_PERFCTR_CPU_CYCLES = 0xFF, | |
754 | }; | |
755 | ||
756 | /* | |
757 | * The hardware events that we support. We do support cache operations but | |
758 | * we have harvard caches and no way to combine instruction and data | |
759 | * accesses/misses in hardware. | |
760 | */ | |
761 | static const unsigned armv6mpcore_perf_map[PERF_COUNT_HW_MAX] = { | |
762 | [PERF_COUNT_HW_CPU_CYCLES] = ARMV6MPCORE_PERFCTR_CPU_CYCLES, | |
763 | [PERF_COUNT_HW_INSTRUCTIONS] = ARMV6MPCORE_PERFCTR_INSTR_EXEC, | |
764 | [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED, | |
765 | [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED, | |
766 | [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV6MPCORE_PERFCTR_BR_EXEC, | |
767 | [PERF_COUNT_HW_BRANCH_MISSES] = ARMV6MPCORE_PERFCTR_BR_MISPREDICT, | |
768 | [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED, | |
769 | }; | |
770 | ||
771 | static const unsigned armv6mpcore_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] | |
772 | [PERF_COUNT_HW_CACHE_OP_MAX] | |
773 | [PERF_COUNT_HW_CACHE_RESULT_MAX] = { | |
774 | [C(L1D)] = { | |
775 | [C(OP_READ)] = { | |
776 | [C(RESULT_ACCESS)] = | |
777 | ARMV6MPCORE_PERFCTR_DCACHE_RDACCESS, | |
778 | [C(RESULT_MISS)] = | |
779 | ARMV6MPCORE_PERFCTR_DCACHE_RDMISS, | |
780 | }, | |
781 | [C(OP_WRITE)] = { | |
782 | [C(RESULT_ACCESS)] = | |
783 | ARMV6MPCORE_PERFCTR_DCACHE_WRACCESS, | |
784 | [C(RESULT_MISS)] = | |
785 | ARMV6MPCORE_PERFCTR_DCACHE_WRMISS, | |
786 | }, | |
787 | [C(OP_PREFETCH)] = { | |
788 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
789 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
790 | }, | |
791 | }, | |
792 | [C(L1I)] = { | |
793 | [C(OP_READ)] = { | |
794 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
795 | [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ICACHE_MISS, | |
796 | }, | |
797 | [C(OP_WRITE)] = { | |
798 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
799 | [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ICACHE_MISS, | |
800 | }, | |
801 | [C(OP_PREFETCH)] = { | |
802 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
803 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
804 | }, | |
805 | }, | |
806 | [C(LL)] = { | |
807 | [C(OP_READ)] = { | |
808 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
809 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
810 | }, | |
811 | [C(OP_WRITE)] = { | |
812 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
813 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
814 | }, | |
815 | [C(OP_PREFETCH)] = { | |
816 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
817 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
818 | }, | |
819 | }, | |
820 | [C(DTLB)] = { | |
821 | /* | |
822 | * The ARM performance counters can count micro DTLB misses, | |
823 | * micro ITLB misses and main TLB misses. There isn't an event | |
824 | * for TLB misses, so use the micro misses here and if users | |
825 | * want the main TLB misses they can use a raw counter. | |
826 | */ | |
827 | [C(OP_READ)] = { | |
828 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
829 | [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_DTLB_MISS, | |
830 | }, | |
831 | [C(OP_WRITE)] = { | |
832 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
833 | [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_DTLB_MISS, | |
834 | }, | |
835 | [C(OP_PREFETCH)] = { | |
836 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
837 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
838 | }, | |
839 | }, | |
840 | [C(ITLB)] = { | |
841 | [C(OP_READ)] = { | |
842 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
843 | [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ITLB_MISS, | |
844 | }, | |
845 | [C(OP_WRITE)] = { | |
846 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
847 | [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ITLB_MISS, | |
848 | }, | |
849 | [C(OP_PREFETCH)] = { | |
850 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
851 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
852 | }, | |
853 | }, | |
854 | [C(BPU)] = { | |
855 | [C(OP_READ)] = { | |
856 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
857 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
858 | }, | |
859 | [C(OP_WRITE)] = { | |
860 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
861 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
862 | }, | |
863 | [C(OP_PREFETCH)] = { | |
864 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
865 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
866 | }, | |
867 | }, | |
868 | }; | |
869 | ||
870 | static inline unsigned long | |
871 | armv6_pmcr_read(void) | |
872 | { | |
873 | u32 val; | |
874 | asm volatile("mrc p15, 0, %0, c15, c12, 0" : "=r"(val)); | |
875 | return val; | |
876 | } | |
877 | ||
878 | static inline void | |
879 | armv6_pmcr_write(unsigned long val) | |
880 | { | |
881 | asm volatile("mcr p15, 0, %0, c15, c12, 0" : : "r"(val)); | |
882 | } | |
883 | ||
884 | #define ARMV6_PMCR_ENABLE (1 << 0) | |
885 | #define ARMV6_PMCR_CTR01_RESET (1 << 1) | |
886 | #define ARMV6_PMCR_CCOUNT_RESET (1 << 2) | |
887 | #define ARMV6_PMCR_CCOUNT_DIV (1 << 3) | |
888 | #define ARMV6_PMCR_COUNT0_IEN (1 << 4) | |
889 | #define ARMV6_PMCR_COUNT1_IEN (1 << 5) | |
890 | #define ARMV6_PMCR_CCOUNT_IEN (1 << 6) | |
891 | #define ARMV6_PMCR_COUNT0_OVERFLOW (1 << 8) | |
892 | #define ARMV6_PMCR_COUNT1_OVERFLOW (1 << 9) | |
893 | #define ARMV6_PMCR_CCOUNT_OVERFLOW (1 << 10) | |
894 | #define ARMV6_PMCR_EVT_COUNT0_SHIFT 20 | |
895 | #define ARMV6_PMCR_EVT_COUNT0_MASK (0xFF << ARMV6_PMCR_EVT_COUNT0_SHIFT) | |
896 | #define ARMV6_PMCR_EVT_COUNT1_SHIFT 12 | |
897 | #define ARMV6_PMCR_EVT_COUNT1_MASK (0xFF << ARMV6_PMCR_EVT_COUNT1_SHIFT) | |
898 | ||
899 | #define ARMV6_PMCR_OVERFLOWED_MASK \ | |
900 | (ARMV6_PMCR_COUNT0_OVERFLOW | ARMV6_PMCR_COUNT1_OVERFLOW | \ | |
901 | ARMV6_PMCR_CCOUNT_OVERFLOW) | |
902 | ||
903 | static inline int | |
904 | armv6_pmcr_has_overflowed(unsigned long pmcr) | |
905 | { | |
906 | return (pmcr & ARMV6_PMCR_OVERFLOWED_MASK); | |
907 | } | |
908 | ||
909 | static inline int | |
910 | armv6_pmcr_counter_has_overflowed(unsigned long pmcr, | |
911 | enum armv6_counters counter) | |
912 | { | |
913 | int ret = 0; | |
914 | ||
915 | if (ARMV6_CYCLE_COUNTER == counter) | |
916 | ret = pmcr & ARMV6_PMCR_CCOUNT_OVERFLOW; | |
917 | else if (ARMV6_COUNTER0 == counter) | |
918 | ret = pmcr & ARMV6_PMCR_COUNT0_OVERFLOW; | |
919 | else if (ARMV6_COUNTER1 == counter) | |
920 | ret = pmcr & ARMV6_PMCR_COUNT1_OVERFLOW; | |
921 | else | |
922 | WARN_ONCE(1, "invalid counter number (%d)\n", counter); | |
923 | ||
924 | return ret; | |
925 | } | |
926 | ||
927 | static inline u32 | |
928 | armv6pmu_read_counter(int counter) | |
929 | { | |
930 | unsigned long value = 0; | |
931 | ||
932 | if (ARMV6_CYCLE_COUNTER == counter) | |
933 | asm volatile("mrc p15, 0, %0, c15, c12, 1" : "=r"(value)); | |
934 | else if (ARMV6_COUNTER0 == counter) | |
935 | asm volatile("mrc p15, 0, %0, c15, c12, 2" : "=r"(value)); | |
936 | else if (ARMV6_COUNTER1 == counter) | |
937 | asm volatile("mrc p15, 0, %0, c15, c12, 3" : "=r"(value)); | |
938 | else | |
939 | WARN_ONCE(1, "invalid counter number (%d)\n", counter); | |
940 | ||
941 | return value; | |
942 | } | |
943 | ||
944 | static inline void | |
945 | armv6pmu_write_counter(int counter, | |
946 | u32 value) | |
947 | { | |
948 | if (ARMV6_CYCLE_COUNTER == counter) | |
949 | asm volatile("mcr p15, 0, %0, c15, c12, 1" : : "r"(value)); | |
950 | else if (ARMV6_COUNTER0 == counter) | |
951 | asm volatile("mcr p15, 0, %0, c15, c12, 2" : : "r"(value)); | |
952 | else if (ARMV6_COUNTER1 == counter) | |
953 | asm volatile("mcr p15, 0, %0, c15, c12, 3" : : "r"(value)); | |
954 | else | |
955 | WARN_ONCE(1, "invalid counter number (%d)\n", counter); | |
956 | } | |
957 | ||
958 | void | |
959 | armv6pmu_enable_event(struct hw_perf_event *hwc, | |
960 | int idx) | |
961 | { | |
962 | unsigned long val, mask, evt, flags; | |
963 | ||
964 | if (ARMV6_CYCLE_COUNTER == idx) { | |
965 | mask = 0; | |
966 | evt = ARMV6_PMCR_CCOUNT_IEN; | |
967 | } else if (ARMV6_COUNTER0 == idx) { | |
968 | mask = ARMV6_PMCR_EVT_COUNT0_MASK; | |
969 | evt = (hwc->config_base << ARMV6_PMCR_EVT_COUNT0_SHIFT) | | |
970 | ARMV6_PMCR_COUNT0_IEN; | |
971 | } else if (ARMV6_COUNTER1 == idx) { | |
972 | mask = ARMV6_PMCR_EVT_COUNT1_MASK; | |
973 | evt = (hwc->config_base << ARMV6_PMCR_EVT_COUNT1_SHIFT) | | |
974 | ARMV6_PMCR_COUNT1_IEN; | |
975 | } else { | |
976 | WARN_ONCE(1, "invalid counter number (%d)\n", idx); | |
977 | return; | |
978 | } | |
979 | ||
980 | /* | |
981 | * Mask out the current event and set the counter to count the event | |
982 | * that we're interested in. | |
983 | */ | |
984 | spin_lock_irqsave(&pmu_lock, flags); | |
985 | val = armv6_pmcr_read(); | |
986 | val &= ~mask; | |
987 | val |= evt; | |
988 | armv6_pmcr_write(val); | |
989 | spin_unlock_irqrestore(&pmu_lock, flags); | |
990 | } | |
991 | ||
992 | static irqreturn_t | |
993 | armv6pmu_handle_irq(int irq_num, | |
994 | void *dev) | |
995 | { | |
996 | unsigned long pmcr = armv6_pmcr_read(); | |
997 | struct perf_sample_data data; | |
998 | struct cpu_hw_events *cpuc; | |
999 | struct pt_regs *regs; | |
1000 | int idx; | |
1001 | ||
1002 | if (!armv6_pmcr_has_overflowed(pmcr)) | |
1003 | return IRQ_NONE; | |
1004 | ||
1005 | regs = get_irq_regs(); | |
1006 | ||
1007 | /* | |
1008 | * The interrupts are cleared by writing the overflow flags back to | |
1009 | * the control register. All of the other bits don't have any effect | |
1010 | * if they are rewritten, so write the whole value back. | |
1011 | */ | |
1012 | armv6_pmcr_write(pmcr); | |
1013 | ||
dc1d628a | 1014 | perf_sample_data_init(&data, 0); |
1b8873a0 JI |
1015 | |
1016 | cpuc = &__get_cpu_var(cpu_hw_events); | |
1017 | for (idx = 0; idx <= armpmu->num_events; ++idx) { | |
1018 | struct perf_event *event = cpuc->events[idx]; | |
1019 | struct hw_perf_event *hwc; | |
1020 | ||
1021 | if (!test_bit(idx, cpuc->active_mask)) | |
1022 | continue; | |
1023 | ||
1024 | /* | |
1025 | * We have a single interrupt for all counters. Check that | |
1026 | * each counter has overflowed before we process it. | |
1027 | */ | |
1028 | if (!armv6_pmcr_counter_has_overflowed(pmcr, idx)) | |
1029 | continue; | |
1030 | ||
1031 | hwc = &event->hw; | |
1032 | armpmu_event_update(event, hwc, idx); | |
1033 | data.period = event->hw.last_period; | |
1034 | if (!armpmu_event_set_period(event, hwc, idx)) | |
1035 | continue; | |
1036 | ||
1037 | if (perf_event_overflow(event, 0, &data, regs)) | |
1038 | armpmu->disable(hwc, idx); | |
1039 | } | |
1040 | ||
1041 | /* | |
1042 | * Handle the pending perf events. | |
1043 | * | |
1044 | * Note: this call *must* be run with interrupts enabled. For | |
1045 | * platforms that can have the PMU interrupts raised as a PMI, this | |
1046 | * will not work. | |
1047 | */ | |
1048 | perf_event_do_pending(); | |
1049 | ||
1050 | return IRQ_HANDLED; | |
1051 | } | |
1052 | ||
1053 | static void | |
1054 | armv6pmu_start(void) | |
1055 | { | |
1056 | unsigned long flags, val; | |
1057 | ||
1058 | spin_lock_irqsave(&pmu_lock, flags); | |
1059 | val = armv6_pmcr_read(); | |
1060 | val |= ARMV6_PMCR_ENABLE; | |
1061 | armv6_pmcr_write(val); | |
1062 | spin_unlock_irqrestore(&pmu_lock, flags); | |
1063 | } | |
1064 | ||
1065 | void | |
1066 | armv6pmu_stop(void) | |
1067 | { | |
1068 | unsigned long flags, val; | |
1069 | ||
1070 | spin_lock_irqsave(&pmu_lock, flags); | |
1071 | val = armv6_pmcr_read(); | |
1072 | val &= ~ARMV6_PMCR_ENABLE; | |
1073 | armv6_pmcr_write(val); | |
1074 | spin_unlock_irqrestore(&pmu_lock, flags); | |
1075 | } | |
1076 | ||
1077 | static inline int | |
1078 | armv6pmu_event_map(int config) | |
1079 | { | |
1080 | int mapping = armv6_perf_map[config]; | |
1081 | if (HW_OP_UNSUPPORTED == mapping) | |
1082 | mapping = -EOPNOTSUPP; | |
1083 | return mapping; | |
1084 | } | |
1085 | ||
1086 | static inline int | |
1087 | armv6mpcore_pmu_event_map(int config) | |
1088 | { | |
1089 | int mapping = armv6mpcore_perf_map[config]; | |
1090 | if (HW_OP_UNSUPPORTED == mapping) | |
1091 | mapping = -EOPNOTSUPP; | |
1092 | return mapping; | |
1093 | } | |
1094 | ||
1095 | static u64 | |
1096 | armv6pmu_raw_event(u64 config) | |
1097 | { | |
1098 | return config & 0xff; | |
1099 | } | |
1100 | ||
1101 | static int | |
1102 | armv6pmu_get_event_idx(struct cpu_hw_events *cpuc, | |
1103 | struct hw_perf_event *event) | |
1104 | { | |
1105 | /* Always place a cycle counter into the cycle counter. */ | |
1106 | if (ARMV6_PERFCTR_CPU_CYCLES == event->config_base) { | |
1107 | if (test_and_set_bit(ARMV6_CYCLE_COUNTER, cpuc->used_mask)) | |
1108 | return -EAGAIN; | |
1109 | ||
1110 | return ARMV6_CYCLE_COUNTER; | |
1111 | } else { | |
1112 | /* | |
1113 | * For anything other than a cycle counter, try and use | |
1114 | * counter0 and counter1. | |
1115 | */ | |
1116 | if (!test_and_set_bit(ARMV6_COUNTER1, cpuc->used_mask)) { | |
1117 | return ARMV6_COUNTER1; | |
1118 | } | |
1119 | ||
1120 | if (!test_and_set_bit(ARMV6_COUNTER0, cpuc->used_mask)) { | |
1121 | return ARMV6_COUNTER0; | |
1122 | } | |
1123 | ||
1124 | /* The counters are all in use. */ | |
1125 | return -EAGAIN; | |
1126 | } | |
1127 | } | |
1128 | ||
1129 | static void | |
1130 | armv6pmu_disable_event(struct hw_perf_event *hwc, | |
1131 | int idx) | |
1132 | { | |
1133 | unsigned long val, mask, evt, flags; | |
1134 | ||
1135 | if (ARMV6_CYCLE_COUNTER == idx) { | |
1136 | mask = ARMV6_PMCR_CCOUNT_IEN; | |
1137 | evt = 0; | |
1138 | } else if (ARMV6_COUNTER0 == idx) { | |
1139 | mask = ARMV6_PMCR_COUNT0_IEN | ARMV6_PMCR_EVT_COUNT0_MASK; | |
1140 | evt = ARMV6_PERFCTR_NOP << ARMV6_PMCR_EVT_COUNT0_SHIFT; | |
1141 | } else if (ARMV6_COUNTER1 == idx) { | |
1142 | mask = ARMV6_PMCR_COUNT1_IEN | ARMV6_PMCR_EVT_COUNT1_MASK; | |
1143 | evt = ARMV6_PERFCTR_NOP << ARMV6_PMCR_EVT_COUNT1_SHIFT; | |
1144 | } else { | |
1145 | WARN_ONCE(1, "invalid counter number (%d)\n", idx); | |
1146 | return; | |
1147 | } | |
1148 | ||
1149 | /* | |
1150 | * Mask out the current event and set the counter to count the number | |
1151 | * of ETM bus signal assertion cycles. The external reporting should | |
1152 | * be disabled and so this should never increment. | |
1153 | */ | |
1154 | spin_lock_irqsave(&pmu_lock, flags); | |
1155 | val = armv6_pmcr_read(); | |
1156 | val &= ~mask; | |
1157 | val |= evt; | |
1158 | armv6_pmcr_write(val); | |
1159 | spin_unlock_irqrestore(&pmu_lock, flags); | |
1160 | } | |
1161 | ||
1162 | static void | |
1163 | armv6mpcore_pmu_disable_event(struct hw_perf_event *hwc, | |
1164 | int idx) | |
1165 | { | |
1166 | unsigned long val, mask, flags, evt = 0; | |
1167 | ||
1168 | if (ARMV6_CYCLE_COUNTER == idx) { | |
1169 | mask = ARMV6_PMCR_CCOUNT_IEN; | |
1170 | } else if (ARMV6_COUNTER0 == idx) { | |
1171 | mask = ARMV6_PMCR_COUNT0_IEN; | |
1172 | } else if (ARMV6_COUNTER1 == idx) { | |
1173 | mask = ARMV6_PMCR_COUNT1_IEN; | |
1174 | } else { | |
1175 | WARN_ONCE(1, "invalid counter number (%d)\n", idx); | |
1176 | return; | |
1177 | } | |
1178 | ||
1179 | /* | |
1180 | * Unlike UP ARMv6, we don't have a way of stopping the counters. We | |
1181 | * simply disable the interrupt reporting. | |
1182 | */ | |
1183 | spin_lock_irqsave(&pmu_lock, flags); | |
1184 | val = armv6_pmcr_read(); | |
1185 | val &= ~mask; | |
1186 | val |= evt; | |
1187 | armv6_pmcr_write(val); | |
1188 | spin_unlock_irqrestore(&pmu_lock, flags); | |
1189 | } | |
1190 | ||
1191 | static const struct arm_pmu armv6pmu = { | |
181193f3 | 1192 | .id = ARM_PERF_PMU_ID_V6, |
1b8873a0 JI |
1193 | .handle_irq = armv6pmu_handle_irq, |
1194 | .enable = armv6pmu_enable_event, | |
1195 | .disable = armv6pmu_disable_event, | |
1196 | .event_map = armv6pmu_event_map, | |
1197 | .raw_event = armv6pmu_raw_event, | |
1198 | .read_counter = armv6pmu_read_counter, | |
1199 | .write_counter = armv6pmu_write_counter, | |
1200 | .get_event_idx = armv6pmu_get_event_idx, | |
1201 | .start = armv6pmu_start, | |
1202 | .stop = armv6pmu_stop, | |
1203 | .num_events = 3, | |
1204 | .max_period = (1LLU << 32) - 1, | |
1205 | }; | |
1206 | ||
1207 | /* | |
1208 | * ARMv6mpcore is almost identical to single core ARMv6 with the exception | |
1209 | * that some of the events have different enumerations and that there is no | |
1210 | * *hack* to stop the programmable counters. To stop the counters we simply | |
1211 | * disable the interrupt reporting and update the event. When unthrottling we | |
1212 | * reset the period and enable the interrupt reporting. | |
1213 | */ | |
1214 | static const struct arm_pmu armv6mpcore_pmu = { | |
181193f3 | 1215 | .id = ARM_PERF_PMU_ID_V6MP, |
1b8873a0 JI |
1216 | .handle_irq = armv6pmu_handle_irq, |
1217 | .enable = armv6pmu_enable_event, | |
1218 | .disable = armv6mpcore_pmu_disable_event, | |
1219 | .event_map = armv6mpcore_pmu_event_map, | |
1220 | .raw_event = armv6pmu_raw_event, | |
1221 | .read_counter = armv6pmu_read_counter, | |
1222 | .write_counter = armv6pmu_write_counter, | |
1223 | .get_event_idx = armv6pmu_get_event_idx, | |
1224 | .start = armv6pmu_start, | |
1225 | .stop = armv6pmu_stop, | |
1226 | .num_events = 3, | |
1227 | .max_period = (1LLU << 32) - 1, | |
1228 | }; | |
1229 | ||
796d1295 JP |
1230 | /* |
1231 | * ARMv7 Cortex-A8 and Cortex-A9 Performance Events handling code. | |
1232 | * | |
1233 | * Copied from ARMv6 code, with the low level code inspired | |
1234 | * by the ARMv7 Oprofile code. | |
1235 | * | |
1236 | * Cortex-A8 has up to 4 configurable performance counters and | |
1237 | * a single cycle counter. | |
1238 | * Cortex-A9 has up to 31 configurable performance counters and | |
1239 | * a single cycle counter. | |
1240 | * | |
1241 | * All counters can be enabled/disabled and IRQ masked separately. The cycle | |
1242 | * counter and all 4 performance counters together can be reset separately. | |
1243 | */ | |
1244 | ||
796d1295 JP |
1245 | /* Common ARMv7 event types */ |
1246 | enum armv7_perf_types { | |
1247 | ARMV7_PERFCTR_PMNC_SW_INCR = 0x00, | |
1248 | ARMV7_PERFCTR_IFETCH_MISS = 0x01, | |
1249 | ARMV7_PERFCTR_ITLB_MISS = 0x02, | |
1250 | ARMV7_PERFCTR_DCACHE_REFILL = 0x03, | |
1251 | ARMV7_PERFCTR_DCACHE_ACCESS = 0x04, | |
1252 | ARMV7_PERFCTR_DTLB_REFILL = 0x05, | |
1253 | ARMV7_PERFCTR_DREAD = 0x06, | |
1254 | ARMV7_PERFCTR_DWRITE = 0x07, | |
1255 | ||
1256 | ARMV7_PERFCTR_EXC_TAKEN = 0x09, | |
1257 | ARMV7_PERFCTR_EXC_EXECUTED = 0x0A, | |
1258 | ARMV7_PERFCTR_CID_WRITE = 0x0B, | |
1259 | /* ARMV7_PERFCTR_PC_WRITE is equivalent to HW_BRANCH_INSTRUCTIONS. | |
1260 | * It counts: | |
1261 | * - all branch instructions, | |
1262 | * - instructions that explicitly write the PC, | |
1263 | * - exception generating instructions. | |
1264 | */ | |
1265 | ARMV7_PERFCTR_PC_WRITE = 0x0C, | |
1266 | ARMV7_PERFCTR_PC_IMM_BRANCH = 0x0D, | |
1267 | ARMV7_PERFCTR_UNALIGNED_ACCESS = 0x0F, | |
1268 | ARMV7_PERFCTR_PC_BRANCH_MIS_PRED = 0x10, | |
1269 | ARMV7_PERFCTR_CLOCK_CYCLES = 0x11, | |
1270 | ||
1271 | ARMV7_PERFCTR_PC_BRANCH_MIS_USED = 0x12, | |
1272 | ||
1273 | ARMV7_PERFCTR_CPU_CYCLES = 0xFF | |
1274 | }; | |
1275 | ||
1276 | /* ARMv7 Cortex-A8 specific event types */ | |
1277 | enum armv7_a8_perf_types { | |
1278 | ARMV7_PERFCTR_INSTR_EXECUTED = 0x08, | |
1279 | ||
1280 | ARMV7_PERFCTR_PC_PROC_RETURN = 0x0E, | |
1281 | ||
1282 | ARMV7_PERFCTR_WRITE_BUFFER_FULL = 0x40, | |
1283 | ARMV7_PERFCTR_L2_STORE_MERGED = 0x41, | |
1284 | ARMV7_PERFCTR_L2_STORE_BUFF = 0x42, | |
1285 | ARMV7_PERFCTR_L2_ACCESS = 0x43, | |
1286 | ARMV7_PERFCTR_L2_CACH_MISS = 0x44, | |
1287 | ARMV7_PERFCTR_AXI_READ_CYCLES = 0x45, | |
1288 | ARMV7_PERFCTR_AXI_WRITE_CYCLES = 0x46, | |
1289 | ARMV7_PERFCTR_MEMORY_REPLAY = 0x47, | |
1290 | ARMV7_PERFCTR_UNALIGNED_ACCESS_REPLAY = 0x48, | |
1291 | ARMV7_PERFCTR_L1_DATA_MISS = 0x49, | |
1292 | ARMV7_PERFCTR_L1_INST_MISS = 0x4A, | |
1293 | ARMV7_PERFCTR_L1_DATA_COLORING = 0x4B, | |
1294 | ARMV7_PERFCTR_L1_NEON_DATA = 0x4C, | |
1295 | ARMV7_PERFCTR_L1_NEON_CACH_DATA = 0x4D, | |
1296 | ARMV7_PERFCTR_L2_NEON = 0x4E, | |
1297 | ARMV7_PERFCTR_L2_NEON_HIT = 0x4F, | |
1298 | ARMV7_PERFCTR_L1_INST = 0x50, | |
1299 | ARMV7_PERFCTR_PC_RETURN_MIS_PRED = 0x51, | |
1300 | ARMV7_PERFCTR_PC_BRANCH_FAILED = 0x52, | |
1301 | ARMV7_PERFCTR_PC_BRANCH_TAKEN = 0x53, | |
1302 | ARMV7_PERFCTR_PC_BRANCH_EXECUTED = 0x54, | |
1303 | ARMV7_PERFCTR_OP_EXECUTED = 0x55, | |
1304 | ARMV7_PERFCTR_CYCLES_INST_STALL = 0x56, | |
1305 | ARMV7_PERFCTR_CYCLES_INST = 0x57, | |
1306 | ARMV7_PERFCTR_CYCLES_NEON_DATA_STALL = 0x58, | |
1307 | ARMV7_PERFCTR_CYCLES_NEON_INST_STALL = 0x59, | |
1308 | ARMV7_PERFCTR_NEON_CYCLES = 0x5A, | |
1309 | ||
1310 | ARMV7_PERFCTR_PMU0_EVENTS = 0x70, | |
1311 | ARMV7_PERFCTR_PMU1_EVENTS = 0x71, | |
1312 | ARMV7_PERFCTR_PMU_EVENTS = 0x72, | |
1313 | }; | |
1314 | ||
1315 | /* ARMv7 Cortex-A9 specific event types */ | |
1316 | enum armv7_a9_perf_types { | |
1317 | ARMV7_PERFCTR_JAVA_HW_BYTECODE_EXEC = 0x40, | |
1318 | ARMV7_PERFCTR_JAVA_SW_BYTECODE_EXEC = 0x41, | |
1319 | ARMV7_PERFCTR_JAZELLE_BRANCH_EXEC = 0x42, | |
1320 | ||
1321 | ARMV7_PERFCTR_COHERENT_LINE_MISS = 0x50, | |
1322 | ARMV7_PERFCTR_COHERENT_LINE_HIT = 0x51, | |
1323 | ||
1324 | ARMV7_PERFCTR_ICACHE_DEP_STALL_CYCLES = 0x60, | |
1325 | ARMV7_PERFCTR_DCACHE_DEP_STALL_CYCLES = 0x61, | |
1326 | ARMV7_PERFCTR_TLB_MISS_DEP_STALL_CYCLES = 0x62, | |
1327 | ARMV7_PERFCTR_STREX_EXECUTED_PASSED = 0x63, | |
1328 | ARMV7_PERFCTR_STREX_EXECUTED_FAILED = 0x64, | |
1329 | ARMV7_PERFCTR_DATA_EVICTION = 0x65, | |
1330 | ARMV7_PERFCTR_ISSUE_STAGE_NO_INST = 0x66, | |
1331 | ARMV7_PERFCTR_ISSUE_STAGE_EMPTY = 0x67, | |
1332 | ARMV7_PERFCTR_INST_OUT_OF_RENAME_STAGE = 0x68, | |
1333 | ||
1334 | ARMV7_PERFCTR_PREDICTABLE_FUNCT_RETURNS = 0x6E, | |
1335 | ||
1336 | ARMV7_PERFCTR_MAIN_UNIT_EXECUTED_INST = 0x70, | |
1337 | ARMV7_PERFCTR_SECOND_UNIT_EXECUTED_INST = 0x71, | |
1338 | ARMV7_PERFCTR_LD_ST_UNIT_EXECUTED_INST = 0x72, | |
1339 | ARMV7_PERFCTR_FP_EXECUTED_INST = 0x73, | |
1340 | ARMV7_PERFCTR_NEON_EXECUTED_INST = 0x74, | |
1341 | ||
1342 | ARMV7_PERFCTR_PLD_FULL_DEP_STALL_CYCLES = 0x80, | |
1343 | ARMV7_PERFCTR_DATA_WR_DEP_STALL_CYCLES = 0x81, | |
1344 | ARMV7_PERFCTR_ITLB_MISS_DEP_STALL_CYCLES = 0x82, | |
1345 | ARMV7_PERFCTR_DTLB_MISS_DEP_STALL_CYCLES = 0x83, | |
1346 | ARMV7_PERFCTR_MICRO_ITLB_MISS_DEP_STALL_CYCLES = 0x84, | |
1347 | ARMV7_PERFCTR_MICRO_DTLB_MISS_DEP_STALL_CYCLES = 0x85, | |
1348 | ARMV7_PERFCTR_DMB_DEP_STALL_CYCLES = 0x86, | |
1349 | ||
1350 | ARMV7_PERFCTR_INTGR_CLK_ENABLED_CYCLES = 0x8A, | |
1351 | ARMV7_PERFCTR_DATA_ENGINE_CLK_EN_CYCLES = 0x8B, | |
1352 | ||
1353 | ARMV7_PERFCTR_ISB_INST = 0x90, | |
1354 | ARMV7_PERFCTR_DSB_INST = 0x91, | |
1355 | ARMV7_PERFCTR_DMB_INST = 0x92, | |
1356 | ARMV7_PERFCTR_EXT_INTERRUPTS = 0x93, | |
1357 | ||
1358 | ARMV7_PERFCTR_PLE_CACHE_LINE_RQST_COMPLETED = 0xA0, | |
1359 | ARMV7_PERFCTR_PLE_CACHE_LINE_RQST_SKIPPED = 0xA1, | |
1360 | ARMV7_PERFCTR_PLE_FIFO_FLUSH = 0xA2, | |
1361 | ARMV7_PERFCTR_PLE_RQST_COMPLETED = 0xA3, | |
1362 | ARMV7_PERFCTR_PLE_FIFO_OVERFLOW = 0xA4, | |
1363 | ARMV7_PERFCTR_PLE_RQST_PROG = 0xA5 | |
1364 | }; | |
1365 | ||
1366 | /* | |
1367 | * Cortex-A8 HW events mapping | |
1368 | * | |
1369 | * The hardware events that we support. We do support cache operations but | |
1370 | * we have harvard caches and no way to combine instruction and data | |
1371 | * accesses/misses in hardware. | |
1372 | */ | |
1373 | static const unsigned armv7_a8_perf_map[PERF_COUNT_HW_MAX] = { | |
1374 | [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES, | |
1375 | [PERF_COUNT_HW_INSTRUCTIONS] = ARMV7_PERFCTR_INSTR_EXECUTED, | |
1376 | [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED, | |
1377 | [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED, | |
1378 | [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE, | |
1379 | [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, | |
1380 | [PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_CLOCK_CYCLES, | |
1381 | }; | |
1382 | ||
1383 | static const unsigned armv7_a8_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] | |
1384 | [PERF_COUNT_HW_CACHE_OP_MAX] | |
1385 | [PERF_COUNT_HW_CACHE_RESULT_MAX] = { | |
1386 | [C(L1D)] = { | |
1387 | /* | |
1388 | * The performance counters don't differentiate between read | |
1389 | * and write accesses/misses so this isn't strictly correct, | |
1390 | * but it's the best we can do. Writes and reads get | |
1391 | * combined. | |
1392 | */ | |
1393 | [C(OP_READ)] = { | |
1394 | [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS, | |
1395 | [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL, | |
1396 | }, | |
1397 | [C(OP_WRITE)] = { | |
1398 | [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS, | |
1399 | [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL, | |
1400 | }, | |
1401 | [C(OP_PREFETCH)] = { | |
1402 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
1403 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
1404 | }, | |
1405 | }, | |
1406 | [C(L1I)] = { | |
1407 | [C(OP_READ)] = { | |
1408 | [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_INST, | |
1409 | [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_INST_MISS, | |
1410 | }, | |
1411 | [C(OP_WRITE)] = { | |
1412 | [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_INST, | |
1413 | [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_INST_MISS, | |
1414 | }, | |
1415 | [C(OP_PREFETCH)] = { | |
1416 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
1417 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
1418 | }, | |
1419 | }, | |
1420 | [C(LL)] = { | |
1421 | [C(OP_READ)] = { | |
1422 | [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L2_ACCESS, | |
1423 | [C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACH_MISS, | |
1424 | }, | |
1425 | [C(OP_WRITE)] = { | |
1426 | [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L2_ACCESS, | |
1427 | [C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACH_MISS, | |
1428 | }, | |
1429 | [C(OP_PREFETCH)] = { | |
1430 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
1431 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
1432 | }, | |
1433 | }, | |
1434 | [C(DTLB)] = { | |
1435 | /* | |
1436 | * Only ITLB misses and DTLB refills are supported. | |
1437 | * If users want the DTLB refills misses a raw counter | |
1438 | * must be used. | |
1439 | */ | |
1440 | [C(OP_READ)] = { | |
1441 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
1442 | [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, | |
1443 | }, | |
1444 | [C(OP_WRITE)] = { | |
1445 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
1446 | [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, | |
1447 | }, | |
1448 | [C(OP_PREFETCH)] = { | |
1449 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
1450 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
1451 | }, | |
1452 | }, | |
1453 | [C(ITLB)] = { | |
1454 | [C(OP_READ)] = { | |
1455 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
1456 | [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS, | |
1457 | }, | |
1458 | [C(OP_WRITE)] = { | |
1459 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
1460 | [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS, | |
1461 | }, | |
1462 | [C(OP_PREFETCH)] = { | |
1463 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
1464 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
1465 | }, | |
1466 | }, | |
1467 | [C(BPU)] = { | |
1468 | [C(OP_READ)] = { | |
1469 | [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE, | |
1470 | [C(RESULT_MISS)] | |
1471 | = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, | |
1472 | }, | |
1473 | [C(OP_WRITE)] = { | |
1474 | [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE, | |
1475 | [C(RESULT_MISS)] | |
1476 | = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, | |
1477 | }, | |
1478 | [C(OP_PREFETCH)] = { | |
1479 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
1480 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
1481 | }, | |
1482 | }, | |
1483 | }; | |
1484 | ||
1485 | /* | |
1486 | * Cortex-A9 HW events mapping | |
1487 | */ | |
1488 | static const unsigned armv7_a9_perf_map[PERF_COUNT_HW_MAX] = { | |
1489 | [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES, | |
1490 | [PERF_COUNT_HW_INSTRUCTIONS] = | |
1491 | ARMV7_PERFCTR_INST_OUT_OF_RENAME_STAGE, | |
1492 | [PERF_COUNT_HW_CACHE_REFERENCES] = ARMV7_PERFCTR_COHERENT_LINE_HIT, | |
1493 | [PERF_COUNT_HW_CACHE_MISSES] = ARMV7_PERFCTR_COHERENT_LINE_MISS, | |
1494 | [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE, | |
1495 | [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, | |
1496 | [PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_CLOCK_CYCLES, | |
1497 | }; | |
1498 | ||
1499 | static const unsigned armv7_a9_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] | |
1500 | [PERF_COUNT_HW_CACHE_OP_MAX] | |
1501 | [PERF_COUNT_HW_CACHE_RESULT_MAX] = { | |
1502 | [C(L1D)] = { | |
1503 | /* | |
1504 | * The performance counters don't differentiate between read | |
1505 | * and write accesses/misses so this isn't strictly correct, | |
1506 | * but it's the best we can do. Writes and reads get | |
1507 | * combined. | |
1508 | */ | |
1509 | [C(OP_READ)] = { | |
1510 | [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS, | |
1511 | [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL, | |
1512 | }, | |
1513 | [C(OP_WRITE)] = { | |
1514 | [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS, | |
1515 | [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL, | |
1516 | }, | |
1517 | [C(OP_PREFETCH)] = { | |
1518 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
1519 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
1520 | }, | |
1521 | }, | |
1522 | [C(L1I)] = { | |
1523 | [C(OP_READ)] = { | |
1524 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
1525 | [C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS, | |
1526 | }, | |
1527 | [C(OP_WRITE)] = { | |
1528 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
1529 | [C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS, | |
1530 | }, | |
1531 | [C(OP_PREFETCH)] = { | |
1532 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
1533 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
1534 | }, | |
1535 | }, | |
1536 | [C(LL)] = { | |
1537 | [C(OP_READ)] = { | |
1538 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
1539 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
1540 | }, | |
1541 | [C(OP_WRITE)] = { | |
1542 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
1543 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
1544 | }, | |
1545 | [C(OP_PREFETCH)] = { | |
1546 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
1547 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
1548 | }, | |
1549 | }, | |
1550 | [C(DTLB)] = { | |
1551 | /* | |
1552 | * Only ITLB misses and DTLB refills are supported. | |
1553 | * If users want the DTLB refills misses a raw counter | |
1554 | * must be used. | |
1555 | */ | |
1556 | [C(OP_READ)] = { | |
1557 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
1558 | [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, | |
1559 | }, | |
1560 | [C(OP_WRITE)] = { | |
1561 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
1562 | [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, | |
1563 | }, | |
1564 | [C(OP_PREFETCH)] = { | |
1565 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
1566 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
1567 | }, | |
1568 | }, | |
1569 | [C(ITLB)] = { | |
1570 | [C(OP_READ)] = { | |
1571 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
1572 | [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS, | |
1573 | }, | |
1574 | [C(OP_WRITE)] = { | |
1575 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
1576 | [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS, | |
1577 | }, | |
1578 | [C(OP_PREFETCH)] = { | |
1579 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
1580 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
1581 | }, | |
1582 | }, | |
1583 | [C(BPU)] = { | |
1584 | [C(OP_READ)] = { | |
1585 | [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE, | |
1586 | [C(RESULT_MISS)] | |
1587 | = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, | |
1588 | }, | |
1589 | [C(OP_WRITE)] = { | |
1590 | [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE, | |
1591 | [C(RESULT_MISS)] | |
1592 | = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, | |
1593 | }, | |
1594 | [C(OP_PREFETCH)] = { | |
1595 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
1596 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
1597 | }, | |
1598 | }, | |
1599 | }; | |
1600 | ||
1601 | /* | |
1602 | * Perf Events counters | |
1603 | */ | |
1604 | enum armv7_counters { | |
1605 | ARMV7_CYCLE_COUNTER = 1, /* Cycle counter */ | |
1606 | ARMV7_COUNTER0 = 2, /* First event counter */ | |
1607 | }; | |
1608 | ||
1609 | /* | |
1610 | * The cycle counter is ARMV7_CYCLE_COUNTER. | |
1611 | * The first event counter is ARMV7_COUNTER0. | |
1612 | * The last event counter is (ARMV7_COUNTER0 + armpmu->num_events - 1). | |
1613 | */ | |
1614 | #define ARMV7_COUNTER_LAST (ARMV7_COUNTER0 + armpmu->num_events - 1) | |
1615 | ||
1616 | /* | |
1617 | * ARMv7 low level PMNC access | |
1618 | */ | |
1619 | ||
1620 | /* | |
1621 | * Per-CPU PMNC: config reg | |
1622 | */ | |
1623 | #define ARMV7_PMNC_E (1 << 0) /* Enable all counters */ | |
1624 | #define ARMV7_PMNC_P (1 << 1) /* Reset all counters */ | |
1625 | #define ARMV7_PMNC_C (1 << 2) /* Cycle counter reset */ | |
1626 | #define ARMV7_PMNC_D (1 << 3) /* CCNT counts every 64th cpu cycle */ | |
1627 | #define ARMV7_PMNC_X (1 << 4) /* Export to ETM */ | |
1628 | #define ARMV7_PMNC_DP (1 << 5) /* Disable CCNT if non-invasive debug*/ | |
1629 | #define ARMV7_PMNC_N_SHIFT 11 /* Number of counters supported */ | |
1630 | #define ARMV7_PMNC_N_MASK 0x1f | |
1631 | #define ARMV7_PMNC_MASK 0x3f /* Mask for writable bits */ | |
1632 | ||
1633 | /* | |
1634 | * Available counters | |
1635 | */ | |
1636 | #define ARMV7_CNT0 0 /* First event counter */ | |
1637 | #define ARMV7_CCNT 31 /* Cycle counter */ | |
1638 | ||
1639 | /* Perf Event to low level counters mapping */ | |
1640 | #define ARMV7_EVENT_CNT_TO_CNTx (ARMV7_COUNTER0 - ARMV7_CNT0) | |
1641 | ||
1642 | /* | |
1643 | * CNTENS: counters enable reg | |
1644 | */ | |
1645 | #define ARMV7_CNTENS_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx)) | |
1646 | #define ARMV7_CNTENS_C (1 << ARMV7_CCNT) | |
1647 | ||
1648 | /* | |
1649 | * CNTENC: counters disable reg | |
1650 | */ | |
1651 | #define ARMV7_CNTENC_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx)) | |
1652 | #define ARMV7_CNTENC_C (1 << ARMV7_CCNT) | |
1653 | ||
1654 | /* | |
1655 | * INTENS: counters overflow interrupt enable reg | |
1656 | */ | |
1657 | #define ARMV7_INTENS_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx)) | |
1658 | #define ARMV7_INTENS_C (1 << ARMV7_CCNT) | |
1659 | ||
1660 | /* | |
1661 | * INTENC: counters overflow interrupt disable reg | |
1662 | */ | |
1663 | #define ARMV7_INTENC_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx)) | |
1664 | #define ARMV7_INTENC_C (1 << ARMV7_CCNT) | |
1665 | ||
1666 | /* | |
1667 | * EVTSEL: Event selection reg | |
1668 | */ | |
d10fca9f | 1669 | #define ARMV7_EVTSEL_MASK 0xff /* Mask for writable bits */ |
796d1295 JP |
1670 | |
1671 | /* | |
1672 | * SELECT: Counter selection reg | |
1673 | */ | |
1674 | #define ARMV7_SELECT_MASK 0x1f /* Mask for writable bits */ | |
1675 | ||
1676 | /* | |
1677 | * FLAG: counters overflow flag status reg | |
1678 | */ | |
1679 | #define ARMV7_FLAG_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx)) | |
1680 | #define ARMV7_FLAG_C (1 << ARMV7_CCNT) | |
1681 | #define ARMV7_FLAG_MASK 0xffffffff /* Mask for writable bits */ | |
1682 | #define ARMV7_OVERFLOWED_MASK ARMV7_FLAG_MASK | |
1683 | ||
1684 | static inline unsigned long armv7_pmnc_read(void) | |
1685 | { | |
1686 | u32 val; | |
1687 | asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r"(val)); | |
1688 | return val; | |
1689 | } | |
1690 | ||
1691 | static inline void armv7_pmnc_write(unsigned long val) | |
1692 | { | |
1693 | val &= ARMV7_PMNC_MASK; | |
1694 | asm volatile("mcr p15, 0, %0, c9, c12, 0" : : "r"(val)); | |
1695 | } | |
1696 | ||
1697 | static inline int armv7_pmnc_has_overflowed(unsigned long pmnc) | |
1698 | { | |
1699 | return pmnc & ARMV7_OVERFLOWED_MASK; | |
1700 | } | |
1701 | ||
1702 | static inline int armv7_pmnc_counter_has_overflowed(unsigned long pmnc, | |
1703 | enum armv7_counters counter) | |
1704 | { | |
1705 | int ret; | |
1706 | ||
1707 | if (counter == ARMV7_CYCLE_COUNTER) | |
1708 | ret = pmnc & ARMV7_FLAG_C; | |
1709 | else if ((counter >= ARMV7_COUNTER0) && (counter <= ARMV7_COUNTER_LAST)) | |
1710 | ret = pmnc & ARMV7_FLAG_P(counter); | |
1711 | else | |
1712 | pr_err("CPU%u checking wrong counter %d overflow status\n", | |
1713 | smp_processor_id(), counter); | |
1714 | ||
1715 | return ret; | |
1716 | } | |
1717 | ||
1718 | static inline int armv7_pmnc_select_counter(unsigned int idx) | |
1719 | { | |
1720 | u32 val; | |
1721 | ||
1722 | if ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST)) { | |
1723 | pr_err("CPU%u selecting wrong PMNC counter" | |
1724 | " %d\n", smp_processor_id(), idx); | |
1725 | return -1; | |
1726 | } | |
1727 | ||
1728 | val = (idx - ARMV7_EVENT_CNT_TO_CNTx) & ARMV7_SELECT_MASK; | |
1729 | asm volatile("mcr p15, 0, %0, c9, c12, 5" : : "r" (val)); | |
1730 | ||
1731 | return idx; | |
1732 | } | |
1733 | ||
1734 | static inline u32 armv7pmu_read_counter(int idx) | |
1735 | { | |
1736 | unsigned long value = 0; | |
1737 | ||
1738 | if (idx == ARMV7_CYCLE_COUNTER) | |
1739 | asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (value)); | |
1740 | else if ((idx >= ARMV7_COUNTER0) && (idx <= ARMV7_COUNTER_LAST)) { | |
1741 | if (armv7_pmnc_select_counter(idx) == idx) | |
1742 | asm volatile("mrc p15, 0, %0, c9, c13, 2" | |
1743 | : "=r" (value)); | |
1744 | } else | |
1745 | pr_err("CPU%u reading wrong counter %d\n", | |
1746 | smp_processor_id(), idx); | |
1747 | ||
1748 | return value; | |
1749 | } | |
1750 | ||
1751 | static inline void armv7pmu_write_counter(int idx, u32 value) | |
1752 | { | |
1753 | if (idx == ARMV7_CYCLE_COUNTER) | |
1754 | asm volatile("mcr p15, 0, %0, c9, c13, 0" : : "r" (value)); | |
1755 | else if ((idx >= ARMV7_COUNTER0) && (idx <= ARMV7_COUNTER_LAST)) { | |
1756 | if (armv7_pmnc_select_counter(idx) == idx) | |
1757 | asm volatile("mcr p15, 0, %0, c9, c13, 2" | |
1758 | : : "r" (value)); | |
1759 | } else | |
1760 | pr_err("CPU%u writing wrong counter %d\n", | |
1761 | smp_processor_id(), idx); | |
1762 | } | |
1763 | ||
1764 | static inline void armv7_pmnc_write_evtsel(unsigned int idx, u32 val) | |
1765 | { | |
1766 | if (armv7_pmnc_select_counter(idx) == idx) { | |
1767 | val &= ARMV7_EVTSEL_MASK; | |
1768 | asm volatile("mcr p15, 0, %0, c9, c13, 1" : : "r" (val)); | |
1769 | } | |
1770 | } | |
1771 | ||
1772 | static inline u32 armv7_pmnc_enable_counter(unsigned int idx) | |
1773 | { | |
1774 | u32 val; | |
1775 | ||
1776 | if ((idx != ARMV7_CYCLE_COUNTER) && | |
1777 | ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) { | |
1778 | pr_err("CPU%u enabling wrong PMNC counter" | |
1779 | " %d\n", smp_processor_id(), idx); | |
1780 | return -1; | |
1781 | } | |
1782 | ||
1783 | if (idx == ARMV7_CYCLE_COUNTER) | |
1784 | val = ARMV7_CNTENS_C; | |
1785 | else | |
1786 | val = ARMV7_CNTENS_P(idx); | |
1787 | ||
1788 | asm volatile("mcr p15, 0, %0, c9, c12, 1" : : "r" (val)); | |
1789 | ||
1790 | return idx; | |
1791 | } | |
1792 | ||
1793 | static inline u32 armv7_pmnc_disable_counter(unsigned int idx) | |
1794 | { | |
1795 | u32 val; | |
1796 | ||
1797 | ||
1798 | if ((idx != ARMV7_CYCLE_COUNTER) && | |
1799 | ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) { | |
1800 | pr_err("CPU%u disabling wrong PMNC counter" | |
1801 | " %d\n", smp_processor_id(), idx); | |
1802 | return -1; | |
1803 | } | |
1804 | ||
1805 | if (idx == ARMV7_CYCLE_COUNTER) | |
1806 | val = ARMV7_CNTENC_C; | |
1807 | else | |
1808 | val = ARMV7_CNTENC_P(idx); | |
1809 | ||
1810 | asm volatile("mcr p15, 0, %0, c9, c12, 2" : : "r" (val)); | |
1811 | ||
1812 | return idx; | |
1813 | } | |
1814 | ||
1815 | static inline u32 armv7_pmnc_enable_intens(unsigned int idx) | |
1816 | { | |
1817 | u32 val; | |
1818 | ||
1819 | if ((idx != ARMV7_CYCLE_COUNTER) && | |
1820 | ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) { | |
1821 | pr_err("CPU%u enabling wrong PMNC counter" | |
1822 | " interrupt enable %d\n", smp_processor_id(), idx); | |
1823 | return -1; | |
1824 | } | |
1825 | ||
1826 | if (idx == ARMV7_CYCLE_COUNTER) | |
1827 | val = ARMV7_INTENS_C; | |
1828 | else | |
1829 | val = ARMV7_INTENS_P(idx); | |
1830 | ||
1831 | asm volatile("mcr p15, 0, %0, c9, c14, 1" : : "r" (val)); | |
1832 | ||
1833 | return idx; | |
1834 | } | |
1835 | ||
1836 | static inline u32 armv7_pmnc_disable_intens(unsigned int idx) | |
1837 | { | |
1838 | u32 val; | |
1839 | ||
1840 | if ((idx != ARMV7_CYCLE_COUNTER) && | |
1841 | ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) { | |
1842 | pr_err("CPU%u disabling wrong PMNC counter" | |
1843 | " interrupt enable %d\n", smp_processor_id(), idx); | |
1844 | return -1; | |
1845 | } | |
1846 | ||
1847 | if (idx == ARMV7_CYCLE_COUNTER) | |
1848 | val = ARMV7_INTENC_C; | |
1849 | else | |
1850 | val = ARMV7_INTENC_P(idx); | |
1851 | ||
1852 | asm volatile("mcr p15, 0, %0, c9, c14, 2" : : "r" (val)); | |
1853 | ||
1854 | return idx; | |
1855 | } | |
1856 | ||
1857 | static inline u32 armv7_pmnc_getreset_flags(void) | |
1858 | { | |
1859 | u32 val; | |
1860 | ||
1861 | /* Read */ | |
1862 | asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val)); | |
1863 | ||
1864 | /* Write to clear flags */ | |
1865 | val &= ARMV7_FLAG_MASK; | |
1866 | asm volatile("mcr p15, 0, %0, c9, c12, 3" : : "r" (val)); | |
1867 | ||
1868 | return val; | |
1869 | } | |
1870 | ||
1871 | #ifdef DEBUG | |
1872 | static void armv7_pmnc_dump_regs(void) | |
1873 | { | |
1874 | u32 val; | |
1875 | unsigned int cnt; | |
1876 | ||
1877 | printk(KERN_INFO "PMNC registers dump:\n"); | |
1878 | ||
1879 | asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r" (val)); | |
1880 | printk(KERN_INFO "PMNC =0x%08x\n", val); | |
1881 | ||
1882 | asm volatile("mrc p15, 0, %0, c9, c12, 1" : "=r" (val)); | |
1883 | printk(KERN_INFO "CNTENS=0x%08x\n", val); | |
1884 | ||
1885 | asm volatile("mrc p15, 0, %0, c9, c14, 1" : "=r" (val)); | |
1886 | printk(KERN_INFO "INTENS=0x%08x\n", val); | |
1887 | ||
1888 | asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val)); | |
1889 | printk(KERN_INFO "FLAGS =0x%08x\n", val); | |
1890 | ||
1891 | asm volatile("mrc p15, 0, %0, c9, c12, 5" : "=r" (val)); | |
1892 | printk(KERN_INFO "SELECT=0x%08x\n", val); | |
1893 | ||
1894 | asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (val)); | |
1895 | printk(KERN_INFO "CCNT =0x%08x\n", val); | |
1896 | ||
1897 | for (cnt = ARMV7_COUNTER0; cnt < ARMV7_COUNTER_LAST; cnt++) { | |
1898 | armv7_pmnc_select_counter(cnt); | |
1899 | asm volatile("mrc p15, 0, %0, c9, c13, 2" : "=r" (val)); | |
1900 | printk(KERN_INFO "CNT[%d] count =0x%08x\n", | |
1901 | cnt-ARMV7_EVENT_CNT_TO_CNTx, val); | |
1902 | asm volatile("mrc p15, 0, %0, c9, c13, 1" : "=r" (val)); | |
1903 | printk(KERN_INFO "CNT[%d] evtsel=0x%08x\n", | |
1904 | cnt-ARMV7_EVENT_CNT_TO_CNTx, val); | |
1905 | } | |
1906 | } | |
1907 | #endif | |
1908 | ||
1909 | void armv7pmu_enable_event(struct hw_perf_event *hwc, int idx) | |
1910 | { | |
1911 | unsigned long flags; | |
1912 | ||
1913 | /* | |
1914 | * Enable counter and interrupt, and set the counter to count | |
1915 | * the event that we're interested in. | |
1916 | */ | |
1917 | spin_lock_irqsave(&pmu_lock, flags); | |
1918 | ||
1919 | /* | |
1920 | * Disable counter | |
1921 | */ | |
1922 | armv7_pmnc_disable_counter(idx); | |
1923 | ||
1924 | /* | |
1925 | * Set event (if destined for PMNx counters) | |
1926 | * We don't need to set the event if it's a cycle count | |
1927 | */ | |
1928 | if (idx != ARMV7_CYCLE_COUNTER) | |
1929 | armv7_pmnc_write_evtsel(idx, hwc->config_base); | |
1930 | ||
1931 | /* | |
1932 | * Enable interrupt for this counter | |
1933 | */ | |
1934 | armv7_pmnc_enable_intens(idx); | |
1935 | ||
1936 | /* | |
1937 | * Enable counter | |
1938 | */ | |
1939 | armv7_pmnc_enable_counter(idx); | |
1940 | ||
1941 | spin_unlock_irqrestore(&pmu_lock, flags); | |
1942 | } | |
1943 | ||
1944 | static void armv7pmu_disable_event(struct hw_perf_event *hwc, int idx) | |
1945 | { | |
1946 | unsigned long flags; | |
1947 | ||
1948 | /* | |
1949 | * Disable counter and interrupt | |
1950 | */ | |
1951 | spin_lock_irqsave(&pmu_lock, flags); | |
1952 | ||
1953 | /* | |
1954 | * Disable counter | |
1955 | */ | |
1956 | armv7_pmnc_disable_counter(idx); | |
1957 | ||
1958 | /* | |
1959 | * Disable interrupt for this counter | |
1960 | */ | |
1961 | armv7_pmnc_disable_intens(idx); | |
1962 | ||
1963 | spin_unlock_irqrestore(&pmu_lock, flags); | |
1964 | } | |
1965 | ||
1966 | static irqreturn_t armv7pmu_handle_irq(int irq_num, void *dev) | |
1967 | { | |
1968 | unsigned long pmnc; | |
1969 | struct perf_sample_data data; | |
1970 | struct cpu_hw_events *cpuc; | |
1971 | struct pt_regs *regs; | |
1972 | int idx; | |
1973 | ||
1974 | /* | |
1975 | * Get and reset the IRQ flags | |
1976 | */ | |
1977 | pmnc = armv7_pmnc_getreset_flags(); | |
1978 | ||
1979 | /* | |
1980 | * Did an overflow occur? | |
1981 | */ | |
1982 | if (!armv7_pmnc_has_overflowed(pmnc)) | |
1983 | return IRQ_NONE; | |
1984 | ||
1985 | /* | |
1986 | * Handle the counter(s) overflow(s) | |
1987 | */ | |
1988 | regs = get_irq_regs(); | |
1989 | ||
dc1d628a | 1990 | perf_sample_data_init(&data, 0); |
796d1295 JP |
1991 | |
1992 | cpuc = &__get_cpu_var(cpu_hw_events); | |
1993 | for (idx = 0; idx <= armpmu->num_events; ++idx) { | |
1994 | struct perf_event *event = cpuc->events[idx]; | |
1995 | struct hw_perf_event *hwc; | |
1996 | ||
1997 | if (!test_bit(idx, cpuc->active_mask)) | |
1998 | continue; | |
1999 | ||
2000 | /* | |
2001 | * We have a single interrupt for all counters. Check that | |
2002 | * each counter has overflowed before we process it. | |
2003 | */ | |
2004 | if (!armv7_pmnc_counter_has_overflowed(pmnc, idx)) | |
2005 | continue; | |
2006 | ||
2007 | hwc = &event->hw; | |
2008 | armpmu_event_update(event, hwc, idx); | |
2009 | data.period = event->hw.last_period; | |
2010 | if (!armpmu_event_set_period(event, hwc, idx)) | |
2011 | continue; | |
2012 | ||
2013 | if (perf_event_overflow(event, 0, &data, regs)) | |
2014 | armpmu->disable(hwc, idx); | |
2015 | } | |
2016 | ||
2017 | /* | |
2018 | * Handle the pending perf events. | |
2019 | * | |
2020 | * Note: this call *must* be run with interrupts enabled. For | |
2021 | * platforms that can have the PMU interrupts raised as a PMI, this | |
2022 | * will not work. | |
2023 | */ | |
2024 | perf_event_do_pending(); | |
2025 | ||
2026 | return IRQ_HANDLED; | |
2027 | } | |
2028 | ||
2029 | static void armv7pmu_start(void) | |
2030 | { | |
2031 | unsigned long flags; | |
2032 | ||
2033 | spin_lock_irqsave(&pmu_lock, flags); | |
2034 | /* Enable all counters */ | |
2035 | armv7_pmnc_write(armv7_pmnc_read() | ARMV7_PMNC_E); | |
2036 | spin_unlock_irqrestore(&pmu_lock, flags); | |
2037 | } | |
2038 | ||
2039 | static void armv7pmu_stop(void) | |
2040 | { | |
2041 | unsigned long flags; | |
2042 | ||
2043 | spin_lock_irqsave(&pmu_lock, flags); | |
2044 | /* Disable all counters */ | |
2045 | armv7_pmnc_write(armv7_pmnc_read() & ~ARMV7_PMNC_E); | |
2046 | spin_unlock_irqrestore(&pmu_lock, flags); | |
2047 | } | |
2048 | ||
2049 | static inline int armv7_a8_pmu_event_map(int config) | |
2050 | { | |
2051 | int mapping = armv7_a8_perf_map[config]; | |
2052 | if (HW_OP_UNSUPPORTED == mapping) | |
2053 | mapping = -EOPNOTSUPP; | |
2054 | return mapping; | |
2055 | } | |
2056 | ||
2057 | static inline int armv7_a9_pmu_event_map(int config) | |
2058 | { | |
2059 | int mapping = armv7_a9_perf_map[config]; | |
2060 | if (HW_OP_UNSUPPORTED == mapping) | |
2061 | mapping = -EOPNOTSUPP; | |
2062 | return mapping; | |
2063 | } | |
2064 | ||
2065 | static u64 armv7pmu_raw_event(u64 config) | |
2066 | { | |
2067 | return config & 0xff; | |
2068 | } | |
2069 | ||
2070 | static int armv7pmu_get_event_idx(struct cpu_hw_events *cpuc, | |
2071 | struct hw_perf_event *event) | |
2072 | { | |
2073 | int idx; | |
2074 | ||
2075 | /* Always place a cycle counter into the cycle counter. */ | |
2076 | if (event->config_base == ARMV7_PERFCTR_CPU_CYCLES) { | |
2077 | if (test_and_set_bit(ARMV7_CYCLE_COUNTER, cpuc->used_mask)) | |
2078 | return -EAGAIN; | |
2079 | ||
2080 | return ARMV7_CYCLE_COUNTER; | |
2081 | } else { | |
2082 | /* | |
2083 | * For anything other than a cycle counter, try and use | |
2084 | * the events counters | |
2085 | */ | |
2086 | for (idx = ARMV7_COUNTER0; idx <= armpmu->num_events; ++idx) { | |
2087 | if (!test_and_set_bit(idx, cpuc->used_mask)) | |
2088 | return idx; | |
2089 | } | |
2090 | ||
2091 | /* The counters are all in use. */ | |
2092 | return -EAGAIN; | |
2093 | } | |
2094 | } | |
2095 | ||
2096 | static struct arm_pmu armv7pmu = { | |
2097 | .handle_irq = armv7pmu_handle_irq, | |
2098 | .enable = armv7pmu_enable_event, | |
2099 | .disable = armv7pmu_disable_event, | |
2100 | .raw_event = armv7pmu_raw_event, | |
2101 | .read_counter = armv7pmu_read_counter, | |
2102 | .write_counter = armv7pmu_write_counter, | |
2103 | .get_event_idx = armv7pmu_get_event_idx, | |
2104 | .start = armv7pmu_start, | |
2105 | .stop = armv7pmu_stop, | |
2106 | .max_period = (1LLU << 32) - 1, | |
2107 | }; | |
2108 | ||
2109 | static u32 __init armv7_reset_read_pmnc(void) | |
2110 | { | |
2111 | u32 nb_cnt; | |
2112 | ||
2113 | /* Initialize & Reset PMNC: C and P bits */ | |
2114 | armv7_pmnc_write(ARMV7_PMNC_P | ARMV7_PMNC_C); | |
2115 | ||
2116 | /* Read the nb of CNTx counters supported from PMNC */ | |
2117 | nb_cnt = (armv7_pmnc_read() >> ARMV7_PMNC_N_SHIFT) & ARMV7_PMNC_N_MASK; | |
2118 | ||
2119 | /* Add the CPU cycles counter and return */ | |
2120 | return nb_cnt + 1; | |
2121 | } | |
2122 | ||
49e6a32f WD |
2123 | /* |
2124 | * ARMv5 [xscale] Performance counter handling code. | |
2125 | * | |
2126 | * Based on xscale OProfile code. | |
2127 | * | |
2128 | * There are two variants of the xscale PMU that we support: | |
2129 | * - xscale1pmu: 2 event counters and a cycle counter | |
2130 | * - xscale2pmu: 4 event counters and a cycle counter | |
2131 | * The two variants share event definitions, but have different | |
2132 | * PMU structures. | |
2133 | */ | |
2134 | ||
2135 | enum xscale_perf_types { | |
2136 | XSCALE_PERFCTR_ICACHE_MISS = 0x00, | |
2137 | XSCALE_PERFCTR_ICACHE_NO_DELIVER = 0x01, | |
2138 | XSCALE_PERFCTR_DATA_STALL = 0x02, | |
2139 | XSCALE_PERFCTR_ITLB_MISS = 0x03, | |
2140 | XSCALE_PERFCTR_DTLB_MISS = 0x04, | |
2141 | XSCALE_PERFCTR_BRANCH = 0x05, | |
2142 | XSCALE_PERFCTR_BRANCH_MISS = 0x06, | |
2143 | XSCALE_PERFCTR_INSTRUCTION = 0x07, | |
2144 | XSCALE_PERFCTR_DCACHE_FULL_STALL = 0x08, | |
2145 | XSCALE_PERFCTR_DCACHE_FULL_STALL_CONTIG = 0x09, | |
2146 | XSCALE_PERFCTR_DCACHE_ACCESS = 0x0A, | |
2147 | XSCALE_PERFCTR_DCACHE_MISS = 0x0B, | |
2148 | XSCALE_PERFCTR_DCACHE_WRITE_BACK = 0x0C, | |
2149 | XSCALE_PERFCTR_PC_CHANGED = 0x0D, | |
2150 | XSCALE_PERFCTR_BCU_REQUEST = 0x10, | |
2151 | XSCALE_PERFCTR_BCU_FULL = 0x11, | |
2152 | XSCALE_PERFCTR_BCU_DRAIN = 0x12, | |
2153 | XSCALE_PERFCTR_BCU_ECC_NO_ELOG = 0x14, | |
2154 | XSCALE_PERFCTR_BCU_1_BIT_ERR = 0x15, | |
2155 | XSCALE_PERFCTR_RMW = 0x16, | |
2156 | /* XSCALE_PERFCTR_CCNT is not hardware defined */ | |
2157 | XSCALE_PERFCTR_CCNT = 0xFE, | |
2158 | XSCALE_PERFCTR_UNUSED = 0xFF, | |
2159 | }; | |
2160 | ||
2161 | enum xscale_counters { | |
2162 | XSCALE_CYCLE_COUNTER = 1, | |
2163 | XSCALE_COUNTER0, | |
2164 | XSCALE_COUNTER1, | |
2165 | XSCALE_COUNTER2, | |
2166 | XSCALE_COUNTER3, | |
2167 | }; | |
2168 | ||
2169 | static const unsigned xscale_perf_map[PERF_COUNT_HW_MAX] = { | |
2170 | [PERF_COUNT_HW_CPU_CYCLES] = XSCALE_PERFCTR_CCNT, | |
2171 | [PERF_COUNT_HW_INSTRUCTIONS] = XSCALE_PERFCTR_INSTRUCTION, | |
2172 | [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED, | |
2173 | [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED, | |
2174 | [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = XSCALE_PERFCTR_BRANCH, | |
2175 | [PERF_COUNT_HW_BRANCH_MISSES] = XSCALE_PERFCTR_BRANCH_MISS, | |
2176 | [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED, | |
2177 | }; | |
2178 | ||
2179 | static const unsigned xscale_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] | |
2180 | [PERF_COUNT_HW_CACHE_OP_MAX] | |
2181 | [PERF_COUNT_HW_CACHE_RESULT_MAX] = { | |
2182 | [C(L1D)] = { | |
2183 | [C(OP_READ)] = { | |
2184 | [C(RESULT_ACCESS)] = XSCALE_PERFCTR_DCACHE_ACCESS, | |
2185 | [C(RESULT_MISS)] = XSCALE_PERFCTR_DCACHE_MISS, | |
2186 | }, | |
2187 | [C(OP_WRITE)] = { | |
2188 | [C(RESULT_ACCESS)] = XSCALE_PERFCTR_DCACHE_ACCESS, | |
2189 | [C(RESULT_MISS)] = XSCALE_PERFCTR_DCACHE_MISS, | |
2190 | }, | |
2191 | [C(OP_PREFETCH)] = { | |
2192 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
2193 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
2194 | }, | |
2195 | }, | |
2196 | [C(L1I)] = { | |
2197 | [C(OP_READ)] = { | |
2198 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
2199 | [C(RESULT_MISS)] = XSCALE_PERFCTR_ICACHE_MISS, | |
2200 | }, | |
2201 | [C(OP_WRITE)] = { | |
2202 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
2203 | [C(RESULT_MISS)] = XSCALE_PERFCTR_ICACHE_MISS, | |
2204 | }, | |
2205 | [C(OP_PREFETCH)] = { | |
2206 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
2207 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
2208 | }, | |
2209 | }, | |
2210 | [C(LL)] = { | |
2211 | [C(OP_READ)] = { | |
2212 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
2213 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
2214 | }, | |
2215 | [C(OP_WRITE)] = { | |
2216 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
2217 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
2218 | }, | |
2219 | [C(OP_PREFETCH)] = { | |
2220 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
2221 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
2222 | }, | |
2223 | }, | |
2224 | [C(DTLB)] = { | |
2225 | [C(OP_READ)] = { | |
2226 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
2227 | [C(RESULT_MISS)] = XSCALE_PERFCTR_DTLB_MISS, | |
2228 | }, | |
2229 | [C(OP_WRITE)] = { | |
2230 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
2231 | [C(RESULT_MISS)] = XSCALE_PERFCTR_DTLB_MISS, | |
2232 | }, | |
2233 | [C(OP_PREFETCH)] = { | |
2234 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
2235 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
2236 | }, | |
2237 | }, | |
2238 | [C(ITLB)] = { | |
2239 | [C(OP_READ)] = { | |
2240 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
2241 | [C(RESULT_MISS)] = XSCALE_PERFCTR_ITLB_MISS, | |
2242 | }, | |
2243 | [C(OP_WRITE)] = { | |
2244 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
2245 | [C(RESULT_MISS)] = XSCALE_PERFCTR_ITLB_MISS, | |
2246 | }, | |
2247 | [C(OP_PREFETCH)] = { | |
2248 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
2249 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
2250 | }, | |
2251 | }, | |
2252 | [C(BPU)] = { | |
2253 | [C(OP_READ)] = { | |
2254 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
2255 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
2256 | }, | |
2257 | [C(OP_WRITE)] = { | |
2258 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
2259 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
2260 | }, | |
2261 | [C(OP_PREFETCH)] = { | |
2262 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
2263 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
2264 | }, | |
2265 | }, | |
2266 | }; | |
2267 | ||
2268 | #define XSCALE_PMU_ENABLE 0x001 | |
2269 | #define XSCALE_PMN_RESET 0x002 | |
2270 | #define XSCALE_CCNT_RESET 0x004 | |
2271 | #define XSCALE_PMU_RESET (CCNT_RESET | PMN_RESET) | |
2272 | #define XSCALE_PMU_CNT64 0x008 | |
2273 | ||
2274 | static inline int | |
2275 | xscalepmu_event_map(int config) | |
2276 | { | |
2277 | int mapping = xscale_perf_map[config]; | |
2278 | if (HW_OP_UNSUPPORTED == mapping) | |
2279 | mapping = -EOPNOTSUPP; | |
2280 | return mapping; | |
2281 | } | |
2282 | ||
2283 | static u64 | |
2284 | xscalepmu_raw_event(u64 config) | |
2285 | { | |
2286 | return config & 0xff; | |
2287 | } | |
2288 | ||
2289 | #define XSCALE1_OVERFLOWED_MASK 0x700 | |
2290 | #define XSCALE1_CCOUNT_OVERFLOW 0x400 | |
2291 | #define XSCALE1_COUNT0_OVERFLOW 0x100 | |
2292 | #define XSCALE1_COUNT1_OVERFLOW 0x200 | |
2293 | #define XSCALE1_CCOUNT_INT_EN 0x040 | |
2294 | #define XSCALE1_COUNT0_INT_EN 0x010 | |
2295 | #define XSCALE1_COUNT1_INT_EN 0x020 | |
2296 | #define XSCALE1_COUNT0_EVT_SHFT 12 | |
2297 | #define XSCALE1_COUNT0_EVT_MASK (0xff << XSCALE1_COUNT0_EVT_SHFT) | |
2298 | #define XSCALE1_COUNT1_EVT_SHFT 20 | |
2299 | #define XSCALE1_COUNT1_EVT_MASK (0xff << XSCALE1_COUNT1_EVT_SHFT) | |
2300 | ||
2301 | static inline u32 | |
2302 | xscale1pmu_read_pmnc(void) | |
2303 | { | |
2304 | u32 val; | |
2305 | asm volatile("mrc p14, 0, %0, c0, c0, 0" : "=r" (val)); | |
2306 | return val; | |
2307 | } | |
2308 | ||
2309 | static inline void | |
2310 | xscale1pmu_write_pmnc(u32 val) | |
2311 | { | |
2312 | /* upper 4bits and 7, 11 are write-as-0 */ | |
2313 | val &= 0xffff77f; | |
2314 | asm volatile("mcr p14, 0, %0, c0, c0, 0" : : "r" (val)); | |
2315 | } | |
2316 | ||
2317 | static inline int | |
2318 | xscale1_pmnc_counter_has_overflowed(unsigned long pmnc, | |
2319 | enum xscale_counters counter) | |
2320 | { | |
2321 | int ret = 0; | |
2322 | ||
2323 | switch (counter) { | |
2324 | case XSCALE_CYCLE_COUNTER: | |
2325 | ret = pmnc & XSCALE1_CCOUNT_OVERFLOW; | |
2326 | break; | |
2327 | case XSCALE_COUNTER0: | |
2328 | ret = pmnc & XSCALE1_COUNT0_OVERFLOW; | |
2329 | break; | |
2330 | case XSCALE_COUNTER1: | |
2331 | ret = pmnc & XSCALE1_COUNT1_OVERFLOW; | |
2332 | break; | |
2333 | default: | |
2334 | WARN_ONCE(1, "invalid counter number (%d)\n", counter); | |
2335 | } | |
2336 | ||
2337 | return ret; | |
2338 | } | |
2339 | ||
2340 | static irqreturn_t | |
2341 | xscale1pmu_handle_irq(int irq_num, void *dev) | |
2342 | { | |
2343 | unsigned long pmnc; | |
2344 | struct perf_sample_data data; | |
2345 | struct cpu_hw_events *cpuc; | |
2346 | struct pt_regs *regs; | |
2347 | int idx; | |
2348 | ||
2349 | /* | |
2350 | * NOTE: there's an A stepping erratum that states if an overflow | |
2351 | * bit already exists and another occurs, the previous | |
2352 | * Overflow bit gets cleared. There's no workaround. | |
2353 | * Fixed in B stepping or later. | |
2354 | */ | |
2355 | pmnc = xscale1pmu_read_pmnc(); | |
2356 | ||
2357 | /* | |
2358 | * Write the value back to clear the overflow flags. Overflow | |
2359 | * flags remain in pmnc for use below. We also disable the PMU | |
2360 | * while we process the interrupt. | |
2361 | */ | |
2362 | xscale1pmu_write_pmnc(pmnc & ~XSCALE_PMU_ENABLE); | |
2363 | ||
2364 | if (!(pmnc & XSCALE1_OVERFLOWED_MASK)) | |
2365 | return IRQ_NONE; | |
2366 | ||
2367 | regs = get_irq_regs(); | |
2368 | ||
2369 | perf_sample_data_init(&data, 0); | |
2370 | ||
2371 | cpuc = &__get_cpu_var(cpu_hw_events); | |
2372 | for (idx = 0; idx <= armpmu->num_events; ++idx) { | |
2373 | struct perf_event *event = cpuc->events[idx]; | |
2374 | struct hw_perf_event *hwc; | |
2375 | ||
2376 | if (!test_bit(idx, cpuc->active_mask)) | |
2377 | continue; | |
2378 | ||
2379 | if (!xscale1_pmnc_counter_has_overflowed(pmnc, idx)) | |
2380 | continue; | |
2381 | ||
2382 | hwc = &event->hw; | |
2383 | armpmu_event_update(event, hwc, idx); | |
2384 | data.period = event->hw.last_period; | |
2385 | if (!armpmu_event_set_period(event, hwc, idx)) | |
2386 | continue; | |
2387 | ||
2388 | if (perf_event_overflow(event, 0, &data, regs)) | |
2389 | armpmu->disable(hwc, idx); | |
2390 | } | |
2391 | ||
2392 | perf_event_do_pending(); | |
2393 | ||
2394 | /* | |
2395 | * Re-enable the PMU. | |
2396 | */ | |
2397 | pmnc = xscale1pmu_read_pmnc() | XSCALE_PMU_ENABLE; | |
2398 | xscale1pmu_write_pmnc(pmnc); | |
2399 | ||
2400 | return IRQ_HANDLED; | |
2401 | } | |
2402 | ||
2403 | static void | |
2404 | xscale1pmu_enable_event(struct hw_perf_event *hwc, int idx) | |
2405 | { | |
2406 | unsigned long val, mask, evt, flags; | |
2407 | ||
2408 | switch (idx) { | |
2409 | case XSCALE_CYCLE_COUNTER: | |
2410 | mask = 0; | |
2411 | evt = XSCALE1_CCOUNT_INT_EN; | |
2412 | break; | |
2413 | case XSCALE_COUNTER0: | |
2414 | mask = XSCALE1_COUNT0_EVT_MASK; | |
2415 | evt = (hwc->config_base << XSCALE1_COUNT0_EVT_SHFT) | | |
2416 | XSCALE1_COUNT0_INT_EN; | |
2417 | break; | |
2418 | case XSCALE_COUNTER1: | |
2419 | mask = XSCALE1_COUNT1_EVT_MASK; | |
2420 | evt = (hwc->config_base << XSCALE1_COUNT1_EVT_SHFT) | | |
2421 | XSCALE1_COUNT1_INT_EN; | |
2422 | break; | |
2423 | default: | |
2424 | WARN_ONCE(1, "invalid counter number (%d)\n", idx); | |
2425 | return; | |
2426 | } | |
2427 | ||
2428 | spin_lock_irqsave(&pmu_lock, flags); | |
2429 | val = xscale1pmu_read_pmnc(); | |
2430 | val &= ~mask; | |
2431 | val |= evt; | |
2432 | xscale1pmu_write_pmnc(val); | |
2433 | spin_unlock_irqrestore(&pmu_lock, flags); | |
2434 | } | |
2435 | ||
2436 | static void | |
2437 | xscale1pmu_disable_event(struct hw_perf_event *hwc, int idx) | |
2438 | { | |
2439 | unsigned long val, mask, evt, flags; | |
2440 | ||
2441 | switch (idx) { | |
2442 | case XSCALE_CYCLE_COUNTER: | |
2443 | mask = XSCALE1_CCOUNT_INT_EN; | |
2444 | evt = 0; | |
2445 | break; | |
2446 | case XSCALE_COUNTER0: | |
2447 | mask = XSCALE1_COUNT0_INT_EN | XSCALE1_COUNT0_EVT_MASK; | |
2448 | evt = XSCALE_PERFCTR_UNUSED << XSCALE1_COUNT0_EVT_SHFT; | |
2449 | break; | |
2450 | case XSCALE_COUNTER1: | |
2451 | mask = XSCALE1_COUNT1_INT_EN | XSCALE1_COUNT1_EVT_MASK; | |
2452 | evt = XSCALE_PERFCTR_UNUSED << XSCALE1_COUNT1_EVT_SHFT; | |
2453 | break; | |
2454 | default: | |
2455 | WARN_ONCE(1, "invalid counter number (%d)\n", idx); | |
2456 | return; | |
2457 | } | |
2458 | ||
2459 | spin_lock_irqsave(&pmu_lock, flags); | |
2460 | val = xscale1pmu_read_pmnc(); | |
2461 | val &= ~mask; | |
2462 | val |= evt; | |
2463 | xscale1pmu_write_pmnc(val); | |
2464 | spin_unlock_irqrestore(&pmu_lock, flags); | |
2465 | } | |
2466 | ||
2467 | static int | |
2468 | xscale1pmu_get_event_idx(struct cpu_hw_events *cpuc, | |
2469 | struct hw_perf_event *event) | |
2470 | { | |
2471 | if (XSCALE_PERFCTR_CCNT == event->config_base) { | |
2472 | if (test_and_set_bit(XSCALE_CYCLE_COUNTER, cpuc->used_mask)) | |
2473 | return -EAGAIN; | |
2474 | ||
2475 | return XSCALE_CYCLE_COUNTER; | |
2476 | } else { | |
2477 | if (!test_and_set_bit(XSCALE_COUNTER1, cpuc->used_mask)) { | |
2478 | return XSCALE_COUNTER1; | |
2479 | } | |
2480 | ||
2481 | if (!test_and_set_bit(XSCALE_COUNTER0, cpuc->used_mask)) { | |
2482 | return XSCALE_COUNTER0; | |
2483 | } | |
2484 | ||
2485 | return -EAGAIN; | |
2486 | } | |
2487 | } | |
2488 | ||
2489 | static void | |
2490 | xscale1pmu_start(void) | |
2491 | { | |
2492 | unsigned long flags, val; | |
2493 | ||
2494 | spin_lock_irqsave(&pmu_lock, flags); | |
2495 | val = xscale1pmu_read_pmnc(); | |
2496 | val |= XSCALE_PMU_ENABLE; | |
2497 | xscale1pmu_write_pmnc(val); | |
2498 | spin_unlock_irqrestore(&pmu_lock, flags); | |
2499 | } | |
2500 | ||
2501 | static void | |
2502 | xscale1pmu_stop(void) | |
2503 | { | |
2504 | unsigned long flags, val; | |
2505 | ||
2506 | spin_lock_irqsave(&pmu_lock, flags); | |
2507 | val = xscale1pmu_read_pmnc(); | |
2508 | val &= ~XSCALE_PMU_ENABLE; | |
2509 | xscale1pmu_write_pmnc(val); | |
2510 | spin_unlock_irqrestore(&pmu_lock, flags); | |
2511 | } | |
2512 | ||
2513 | static inline u32 | |
2514 | xscale1pmu_read_counter(int counter) | |
2515 | { | |
2516 | u32 val = 0; | |
2517 | ||
2518 | switch (counter) { | |
2519 | case XSCALE_CYCLE_COUNTER: | |
2520 | asm volatile("mrc p14, 0, %0, c1, c0, 0" : "=r" (val)); | |
2521 | break; | |
2522 | case XSCALE_COUNTER0: | |
2523 | asm volatile("mrc p14, 0, %0, c2, c0, 0" : "=r" (val)); | |
2524 | break; | |
2525 | case XSCALE_COUNTER1: | |
2526 | asm volatile("mrc p14, 0, %0, c3, c0, 0" : "=r" (val)); | |
2527 | break; | |
2528 | } | |
2529 | ||
2530 | return val; | |
2531 | } | |
2532 | ||
2533 | static inline void | |
2534 | xscale1pmu_write_counter(int counter, u32 val) | |
2535 | { | |
2536 | switch (counter) { | |
2537 | case XSCALE_CYCLE_COUNTER: | |
2538 | asm volatile("mcr p14, 0, %0, c1, c0, 0" : : "r" (val)); | |
2539 | break; | |
2540 | case XSCALE_COUNTER0: | |
2541 | asm volatile("mcr p14, 0, %0, c2, c0, 0" : : "r" (val)); | |
2542 | break; | |
2543 | case XSCALE_COUNTER1: | |
2544 | asm volatile("mcr p14, 0, %0, c3, c0, 0" : : "r" (val)); | |
2545 | break; | |
2546 | } | |
2547 | } | |
2548 | ||
2549 | static const struct arm_pmu xscale1pmu = { | |
2550 | .id = ARM_PERF_PMU_ID_XSCALE1, | |
2551 | .handle_irq = xscale1pmu_handle_irq, | |
2552 | .enable = xscale1pmu_enable_event, | |
2553 | .disable = xscale1pmu_disable_event, | |
2554 | .event_map = xscalepmu_event_map, | |
2555 | .raw_event = xscalepmu_raw_event, | |
2556 | .read_counter = xscale1pmu_read_counter, | |
2557 | .write_counter = xscale1pmu_write_counter, | |
2558 | .get_event_idx = xscale1pmu_get_event_idx, | |
2559 | .start = xscale1pmu_start, | |
2560 | .stop = xscale1pmu_stop, | |
2561 | .num_events = 3, | |
2562 | .max_period = (1LLU << 32) - 1, | |
2563 | }; | |
2564 | ||
2565 | #define XSCALE2_OVERFLOWED_MASK 0x01f | |
2566 | #define XSCALE2_CCOUNT_OVERFLOW 0x001 | |
2567 | #define XSCALE2_COUNT0_OVERFLOW 0x002 | |
2568 | #define XSCALE2_COUNT1_OVERFLOW 0x004 | |
2569 | #define XSCALE2_COUNT2_OVERFLOW 0x008 | |
2570 | #define XSCALE2_COUNT3_OVERFLOW 0x010 | |
2571 | #define XSCALE2_CCOUNT_INT_EN 0x001 | |
2572 | #define XSCALE2_COUNT0_INT_EN 0x002 | |
2573 | #define XSCALE2_COUNT1_INT_EN 0x004 | |
2574 | #define XSCALE2_COUNT2_INT_EN 0x008 | |
2575 | #define XSCALE2_COUNT3_INT_EN 0x010 | |
2576 | #define XSCALE2_COUNT0_EVT_SHFT 0 | |
2577 | #define XSCALE2_COUNT0_EVT_MASK (0xff << XSCALE2_COUNT0_EVT_SHFT) | |
2578 | #define XSCALE2_COUNT1_EVT_SHFT 8 | |
2579 | #define XSCALE2_COUNT1_EVT_MASK (0xff << XSCALE2_COUNT1_EVT_SHFT) | |
2580 | #define XSCALE2_COUNT2_EVT_SHFT 16 | |
2581 | #define XSCALE2_COUNT2_EVT_MASK (0xff << XSCALE2_COUNT2_EVT_SHFT) | |
2582 | #define XSCALE2_COUNT3_EVT_SHFT 24 | |
2583 | #define XSCALE2_COUNT3_EVT_MASK (0xff << XSCALE2_COUNT3_EVT_SHFT) | |
2584 | ||
2585 | static inline u32 | |
2586 | xscale2pmu_read_pmnc(void) | |
2587 | { | |
2588 | u32 val; | |
2589 | asm volatile("mrc p14, 0, %0, c0, c1, 0" : "=r" (val)); | |
2590 | /* bits 1-2 and 4-23 are read-unpredictable */ | |
2591 | return val & 0xff000009; | |
2592 | } | |
2593 | ||
2594 | static inline void | |
2595 | xscale2pmu_write_pmnc(u32 val) | |
2596 | { | |
2597 | /* bits 4-23 are write-as-0, 24-31 are write ignored */ | |
2598 | val &= 0xf; | |
2599 | asm volatile("mcr p14, 0, %0, c0, c1, 0" : : "r" (val)); | |
2600 | } | |
2601 | ||
2602 | static inline u32 | |
2603 | xscale2pmu_read_overflow_flags(void) | |
2604 | { | |
2605 | u32 val; | |
2606 | asm volatile("mrc p14, 0, %0, c5, c1, 0" : "=r" (val)); | |
2607 | return val; | |
2608 | } | |
2609 | ||
2610 | static inline void | |
2611 | xscale2pmu_write_overflow_flags(u32 val) | |
2612 | { | |
2613 | asm volatile("mcr p14, 0, %0, c5, c1, 0" : : "r" (val)); | |
2614 | } | |
2615 | ||
2616 | static inline u32 | |
2617 | xscale2pmu_read_event_select(void) | |
2618 | { | |
2619 | u32 val; | |
2620 | asm volatile("mrc p14, 0, %0, c8, c1, 0" : "=r" (val)); | |
2621 | return val; | |
2622 | } | |
2623 | ||
2624 | static inline void | |
2625 | xscale2pmu_write_event_select(u32 val) | |
2626 | { | |
2627 | asm volatile("mcr p14, 0, %0, c8, c1, 0" : : "r"(val)); | |
2628 | } | |
2629 | ||
2630 | static inline u32 | |
2631 | xscale2pmu_read_int_enable(void) | |
2632 | { | |
2633 | u32 val; | |
2634 | asm volatile("mrc p14, 0, %0, c4, c1, 0" : "=r" (val)); | |
2635 | return val; | |
2636 | } | |
2637 | ||
2638 | static void | |
2639 | xscale2pmu_write_int_enable(u32 val) | |
2640 | { | |
2641 | asm volatile("mcr p14, 0, %0, c4, c1, 0" : : "r" (val)); | |
2642 | } | |
2643 | ||
2644 | static inline int | |
2645 | xscale2_pmnc_counter_has_overflowed(unsigned long of_flags, | |
2646 | enum xscale_counters counter) | |
2647 | { | |
2648 | int ret = 0; | |
2649 | ||
2650 | switch (counter) { | |
2651 | case XSCALE_CYCLE_COUNTER: | |
2652 | ret = of_flags & XSCALE2_CCOUNT_OVERFLOW; | |
2653 | break; | |
2654 | case XSCALE_COUNTER0: | |
2655 | ret = of_flags & XSCALE2_COUNT0_OVERFLOW; | |
2656 | break; | |
2657 | case XSCALE_COUNTER1: | |
2658 | ret = of_flags & XSCALE2_COUNT1_OVERFLOW; | |
2659 | break; | |
2660 | case XSCALE_COUNTER2: | |
2661 | ret = of_flags & XSCALE2_COUNT2_OVERFLOW; | |
2662 | break; | |
2663 | case XSCALE_COUNTER3: | |
2664 | ret = of_flags & XSCALE2_COUNT3_OVERFLOW; | |
2665 | break; | |
2666 | default: | |
2667 | WARN_ONCE(1, "invalid counter number (%d)\n", counter); | |
2668 | } | |
2669 | ||
2670 | return ret; | |
2671 | } | |
2672 | ||
2673 | static irqreturn_t | |
2674 | xscale2pmu_handle_irq(int irq_num, void *dev) | |
2675 | { | |
2676 | unsigned long pmnc, of_flags; | |
2677 | struct perf_sample_data data; | |
2678 | struct cpu_hw_events *cpuc; | |
2679 | struct pt_regs *regs; | |
2680 | int idx; | |
2681 | ||
2682 | /* Disable the PMU. */ | |
2683 | pmnc = xscale2pmu_read_pmnc(); | |
2684 | xscale2pmu_write_pmnc(pmnc & ~XSCALE_PMU_ENABLE); | |
2685 | ||
2686 | /* Check the overflow flag register. */ | |
2687 | of_flags = xscale2pmu_read_overflow_flags(); | |
2688 | if (!(of_flags & XSCALE2_OVERFLOWED_MASK)) | |
2689 | return IRQ_NONE; | |
2690 | ||
2691 | /* Clear the overflow bits. */ | |
2692 | xscale2pmu_write_overflow_flags(of_flags); | |
2693 | ||
2694 | regs = get_irq_regs(); | |
2695 | ||
2696 | perf_sample_data_init(&data, 0); | |
2697 | ||
2698 | cpuc = &__get_cpu_var(cpu_hw_events); | |
2699 | for (idx = 0; idx <= armpmu->num_events; ++idx) { | |
2700 | struct perf_event *event = cpuc->events[idx]; | |
2701 | struct hw_perf_event *hwc; | |
2702 | ||
2703 | if (!test_bit(idx, cpuc->active_mask)) | |
2704 | continue; | |
2705 | ||
2706 | if (!xscale2_pmnc_counter_has_overflowed(pmnc, idx)) | |
2707 | continue; | |
2708 | ||
2709 | hwc = &event->hw; | |
2710 | armpmu_event_update(event, hwc, idx); | |
2711 | data.period = event->hw.last_period; | |
2712 | if (!armpmu_event_set_period(event, hwc, idx)) | |
2713 | continue; | |
2714 | ||
2715 | if (perf_event_overflow(event, 0, &data, regs)) | |
2716 | armpmu->disable(hwc, idx); | |
2717 | } | |
2718 | ||
2719 | perf_event_do_pending(); | |
2720 | ||
2721 | /* | |
2722 | * Re-enable the PMU. | |
2723 | */ | |
2724 | pmnc = xscale2pmu_read_pmnc() | XSCALE_PMU_ENABLE; | |
2725 | xscale2pmu_write_pmnc(pmnc); | |
2726 | ||
2727 | return IRQ_HANDLED; | |
2728 | } | |
2729 | ||
2730 | static void | |
2731 | xscale2pmu_enable_event(struct hw_perf_event *hwc, int idx) | |
2732 | { | |
2733 | unsigned long flags, ien, evtsel; | |
2734 | ||
2735 | ien = xscale2pmu_read_int_enable(); | |
2736 | evtsel = xscale2pmu_read_event_select(); | |
2737 | ||
2738 | switch (idx) { | |
2739 | case XSCALE_CYCLE_COUNTER: | |
2740 | ien |= XSCALE2_CCOUNT_INT_EN; | |
2741 | break; | |
2742 | case XSCALE_COUNTER0: | |
2743 | ien |= XSCALE2_COUNT0_INT_EN; | |
2744 | evtsel &= ~XSCALE2_COUNT0_EVT_MASK; | |
2745 | evtsel |= hwc->config_base << XSCALE2_COUNT0_EVT_SHFT; | |
2746 | break; | |
2747 | case XSCALE_COUNTER1: | |
2748 | ien |= XSCALE2_COUNT1_INT_EN; | |
2749 | evtsel &= ~XSCALE2_COUNT1_EVT_MASK; | |
2750 | evtsel |= hwc->config_base << XSCALE2_COUNT1_EVT_SHFT; | |
2751 | break; | |
2752 | case XSCALE_COUNTER2: | |
2753 | ien |= XSCALE2_COUNT2_INT_EN; | |
2754 | evtsel &= ~XSCALE2_COUNT2_EVT_MASK; | |
2755 | evtsel |= hwc->config_base << XSCALE2_COUNT2_EVT_SHFT; | |
2756 | break; | |
2757 | case XSCALE_COUNTER3: | |
2758 | ien |= XSCALE2_COUNT3_INT_EN; | |
2759 | evtsel &= ~XSCALE2_COUNT3_EVT_MASK; | |
2760 | evtsel |= hwc->config_base << XSCALE2_COUNT3_EVT_SHFT; | |
2761 | break; | |
2762 | default: | |
2763 | WARN_ONCE(1, "invalid counter number (%d)\n", idx); | |
2764 | return; | |
2765 | } | |
2766 | ||
2767 | spin_lock_irqsave(&pmu_lock, flags); | |
2768 | xscale2pmu_write_event_select(evtsel); | |
2769 | xscale2pmu_write_int_enable(ien); | |
2770 | spin_unlock_irqrestore(&pmu_lock, flags); | |
2771 | } | |
2772 | ||
2773 | static void | |
2774 | xscale2pmu_disable_event(struct hw_perf_event *hwc, int idx) | |
2775 | { | |
2776 | unsigned long flags, ien, evtsel; | |
2777 | ||
2778 | ien = xscale2pmu_read_int_enable(); | |
2779 | evtsel = xscale2pmu_read_event_select(); | |
2780 | ||
2781 | switch (idx) { | |
2782 | case XSCALE_CYCLE_COUNTER: | |
2783 | ien &= ~XSCALE2_CCOUNT_INT_EN; | |
2784 | break; | |
2785 | case XSCALE_COUNTER0: | |
2786 | ien &= ~XSCALE2_COUNT0_INT_EN; | |
2787 | evtsel &= ~XSCALE2_COUNT0_EVT_MASK; | |
2788 | evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT0_EVT_SHFT; | |
2789 | break; | |
2790 | case XSCALE_COUNTER1: | |
2791 | ien &= ~XSCALE2_COUNT1_INT_EN; | |
2792 | evtsel &= ~XSCALE2_COUNT1_EVT_MASK; | |
2793 | evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT1_EVT_SHFT; | |
2794 | break; | |
2795 | case XSCALE_COUNTER2: | |
2796 | ien &= ~XSCALE2_COUNT2_INT_EN; | |
2797 | evtsel &= ~XSCALE2_COUNT2_EVT_MASK; | |
2798 | evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT2_EVT_SHFT; | |
2799 | break; | |
2800 | case XSCALE_COUNTER3: | |
2801 | ien &= ~XSCALE2_COUNT3_INT_EN; | |
2802 | evtsel &= ~XSCALE2_COUNT3_EVT_MASK; | |
2803 | evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT3_EVT_SHFT; | |
2804 | break; | |
2805 | default: | |
2806 | WARN_ONCE(1, "invalid counter number (%d)\n", idx); | |
2807 | return; | |
2808 | } | |
2809 | ||
2810 | spin_lock_irqsave(&pmu_lock, flags); | |
2811 | xscale2pmu_write_event_select(evtsel); | |
2812 | xscale2pmu_write_int_enable(ien); | |
2813 | spin_unlock_irqrestore(&pmu_lock, flags); | |
2814 | } | |
2815 | ||
2816 | static int | |
2817 | xscale2pmu_get_event_idx(struct cpu_hw_events *cpuc, | |
2818 | struct hw_perf_event *event) | |
2819 | { | |
2820 | int idx = xscale1pmu_get_event_idx(cpuc, event); | |
2821 | if (idx >= 0) | |
2822 | goto out; | |
2823 | ||
2824 | if (!test_and_set_bit(XSCALE_COUNTER3, cpuc->used_mask)) | |
2825 | idx = XSCALE_COUNTER3; | |
2826 | else if (!test_and_set_bit(XSCALE_COUNTER2, cpuc->used_mask)) | |
2827 | idx = XSCALE_COUNTER2; | |
2828 | out: | |
2829 | return idx; | |
2830 | } | |
2831 | ||
2832 | static void | |
2833 | xscale2pmu_start(void) | |
2834 | { | |
2835 | unsigned long flags, val; | |
2836 | ||
2837 | spin_lock_irqsave(&pmu_lock, flags); | |
2838 | val = xscale2pmu_read_pmnc() & ~XSCALE_PMU_CNT64; | |
2839 | val |= XSCALE_PMU_ENABLE; | |
2840 | xscale2pmu_write_pmnc(val); | |
2841 | spin_unlock_irqrestore(&pmu_lock, flags); | |
2842 | } | |
2843 | ||
2844 | static void | |
2845 | xscale2pmu_stop(void) | |
2846 | { | |
2847 | unsigned long flags, val; | |
2848 | ||
2849 | spin_lock_irqsave(&pmu_lock, flags); | |
2850 | val = xscale2pmu_read_pmnc(); | |
2851 | val &= ~XSCALE_PMU_ENABLE; | |
2852 | xscale2pmu_write_pmnc(val); | |
2853 | spin_unlock_irqrestore(&pmu_lock, flags); | |
2854 | } | |
2855 | ||
2856 | static inline u32 | |
2857 | xscale2pmu_read_counter(int counter) | |
2858 | { | |
2859 | u32 val = 0; | |
2860 | ||
2861 | switch (counter) { | |
2862 | case XSCALE_CYCLE_COUNTER: | |
2863 | asm volatile("mrc p14, 0, %0, c1, c1, 0" : "=r" (val)); | |
2864 | break; | |
2865 | case XSCALE_COUNTER0: | |
2866 | asm volatile("mrc p14, 0, %0, c0, c2, 0" : "=r" (val)); | |
2867 | break; | |
2868 | case XSCALE_COUNTER1: | |
2869 | asm volatile("mrc p14, 0, %0, c1, c2, 0" : "=r" (val)); | |
2870 | break; | |
2871 | case XSCALE_COUNTER2: | |
2872 | asm volatile("mrc p14, 0, %0, c2, c2, 0" : "=r" (val)); | |
2873 | break; | |
2874 | case XSCALE_COUNTER3: | |
2875 | asm volatile("mrc p14, 0, %0, c3, c2, 0" : "=r" (val)); | |
2876 | break; | |
2877 | } | |
2878 | ||
2879 | return val; | |
2880 | } | |
2881 | ||
2882 | static inline void | |
2883 | xscale2pmu_write_counter(int counter, u32 val) | |
2884 | { | |
2885 | switch (counter) { | |
2886 | case XSCALE_CYCLE_COUNTER: | |
2887 | asm volatile("mcr p14, 0, %0, c1, c1, 0" : : "r" (val)); | |
2888 | break; | |
2889 | case XSCALE_COUNTER0: | |
2890 | asm volatile("mcr p14, 0, %0, c0, c2, 0" : : "r" (val)); | |
2891 | break; | |
2892 | case XSCALE_COUNTER1: | |
2893 | asm volatile("mcr p14, 0, %0, c1, c2, 0" : : "r" (val)); | |
2894 | break; | |
2895 | case XSCALE_COUNTER2: | |
2896 | asm volatile("mcr p14, 0, %0, c2, c2, 0" : : "r" (val)); | |
2897 | break; | |
2898 | case XSCALE_COUNTER3: | |
2899 | asm volatile("mcr p14, 0, %0, c3, c2, 0" : : "r" (val)); | |
2900 | break; | |
2901 | } | |
2902 | } | |
2903 | ||
2904 | static const struct arm_pmu xscale2pmu = { | |
2905 | .id = ARM_PERF_PMU_ID_XSCALE2, | |
2906 | .handle_irq = xscale2pmu_handle_irq, | |
2907 | .enable = xscale2pmu_enable_event, | |
2908 | .disable = xscale2pmu_disable_event, | |
2909 | .event_map = xscalepmu_event_map, | |
2910 | .raw_event = xscalepmu_raw_event, | |
2911 | .read_counter = xscale2pmu_read_counter, | |
2912 | .write_counter = xscale2pmu_write_counter, | |
2913 | .get_event_idx = xscale2pmu_get_event_idx, | |
2914 | .start = xscale2pmu_start, | |
2915 | .stop = xscale2pmu_stop, | |
2916 | .num_events = 5, | |
2917 | .max_period = (1LLU << 32) - 1, | |
2918 | }; | |
2919 | ||
1b8873a0 JI |
2920 | static int __init |
2921 | init_hw_perf_events(void) | |
2922 | { | |
2923 | unsigned long cpuid = read_cpuid_id(); | |
2924 | unsigned long implementor = (cpuid & 0xFF000000) >> 24; | |
2925 | unsigned long part_number = (cpuid & 0xFFF0); | |
2926 | ||
49e6a32f | 2927 | /* ARM Ltd CPUs. */ |
1b8873a0 JI |
2928 | if (0x41 == implementor) { |
2929 | switch (part_number) { | |
2930 | case 0xB360: /* ARM1136 */ | |
2931 | case 0xB560: /* ARM1156 */ | |
2932 | case 0xB760: /* ARM1176 */ | |
2933 | armpmu = &armv6pmu; | |
2934 | memcpy(armpmu_perf_cache_map, armv6_perf_cache_map, | |
2935 | sizeof(armv6_perf_cache_map)); | |
2936 | perf_max_events = armv6pmu.num_events; | |
2937 | break; | |
2938 | case 0xB020: /* ARM11mpcore */ | |
2939 | armpmu = &armv6mpcore_pmu; | |
2940 | memcpy(armpmu_perf_cache_map, | |
2941 | armv6mpcore_perf_cache_map, | |
2942 | sizeof(armv6mpcore_perf_cache_map)); | |
2943 | perf_max_events = armv6mpcore_pmu.num_events; | |
2944 | break; | |
796d1295 | 2945 | case 0xC080: /* Cortex-A8 */ |
181193f3 | 2946 | armv7pmu.id = ARM_PERF_PMU_ID_CA8; |
796d1295 JP |
2947 | memcpy(armpmu_perf_cache_map, armv7_a8_perf_cache_map, |
2948 | sizeof(armv7_a8_perf_cache_map)); | |
2949 | armv7pmu.event_map = armv7_a8_pmu_event_map; | |
2950 | armpmu = &armv7pmu; | |
2951 | ||
2952 | /* Reset PMNC and read the nb of CNTx counters | |
2953 | supported */ | |
2954 | armv7pmu.num_events = armv7_reset_read_pmnc(); | |
2955 | perf_max_events = armv7pmu.num_events; | |
2956 | break; | |
2957 | case 0xC090: /* Cortex-A9 */ | |
181193f3 | 2958 | armv7pmu.id = ARM_PERF_PMU_ID_CA9; |
796d1295 JP |
2959 | memcpy(armpmu_perf_cache_map, armv7_a9_perf_cache_map, |
2960 | sizeof(armv7_a9_perf_cache_map)); | |
2961 | armv7pmu.event_map = armv7_a9_pmu_event_map; | |
2962 | armpmu = &armv7pmu; | |
2963 | ||
2964 | /* Reset PMNC and read the nb of CNTx counters | |
2965 | supported */ | |
2966 | armv7pmu.num_events = armv7_reset_read_pmnc(); | |
2967 | perf_max_events = armv7pmu.num_events; | |
2968 | break; | |
49e6a32f WD |
2969 | } |
2970 | /* Intel CPUs [xscale]. */ | |
2971 | } else if (0x69 == implementor) { | |
2972 | part_number = (cpuid >> 13) & 0x7; | |
2973 | switch (part_number) { | |
2974 | case 1: | |
2975 | armpmu = &xscale1pmu; | |
2976 | memcpy(armpmu_perf_cache_map, xscale_perf_cache_map, | |
2977 | sizeof(xscale_perf_cache_map)); | |
2978 | perf_max_events = xscale1pmu.num_events; | |
2979 | break; | |
2980 | case 2: | |
2981 | armpmu = &xscale2pmu; | |
2982 | memcpy(armpmu_perf_cache_map, xscale_perf_cache_map, | |
2983 | sizeof(xscale_perf_cache_map)); | |
2984 | perf_max_events = xscale2pmu.num_events; | |
2985 | break; | |
1b8873a0 JI |
2986 | } |
2987 | } | |
2988 | ||
49e6a32f | 2989 | if (armpmu) { |
796d1295 | 2990 | pr_info("enabled with %s PMU driver, %d counters available\n", |
49e6a32f WD |
2991 | arm_pmu_names[armpmu->id], armpmu->num_events); |
2992 | } else { | |
2993 | pr_info("no hardware support available\n"); | |
2994 | perf_max_events = -1; | |
2995 | } | |
1b8873a0 JI |
2996 | |
2997 | return 0; | |
2998 | } | |
2999 | arch_initcall(init_hw_perf_events); | |
3000 | ||
3001 | /* | |
3002 | * Callchain handling code. | |
3003 | */ | |
3004 | static inline void | |
3005 | callchain_store(struct perf_callchain_entry *entry, | |
3006 | u64 ip) | |
3007 | { | |
3008 | if (entry->nr < PERF_MAX_STACK_DEPTH) | |
3009 | entry->ip[entry->nr++] = ip; | |
3010 | } | |
3011 | ||
3012 | /* | |
3013 | * The registers we're interested in are at the end of the variable | |
3014 | * length saved register structure. The fp points at the end of this | |
3015 | * structure so the address of this struct is: | |
3016 | * (struct frame_tail *)(xxx->fp)-1 | |
3017 | * | |
3018 | * This code has been adapted from the ARM OProfile support. | |
3019 | */ | |
3020 | struct frame_tail { | |
3021 | struct frame_tail *fp; | |
3022 | unsigned long sp; | |
3023 | unsigned long lr; | |
3024 | } __attribute__((packed)); | |
3025 | ||
3026 | /* | |
3027 | * Get the return address for a single stackframe and return a pointer to the | |
3028 | * next frame tail. | |
3029 | */ | |
3030 | static struct frame_tail * | |
3031 | user_backtrace(struct frame_tail *tail, | |
3032 | struct perf_callchain_entry *entry) | |
3033 | { | |
3034 | struct frame_tail buftail; | |
3035 | ||
3036 | /* Also check accessibility of one struct frame_tail beyond */ | |
3037 | if (!access_ok(VERIFY_READ, tail, sizeof(buftail))) | |
3038 | return NULL; | |
3039 | if (__copy_from_user_inatomic(&buftail, tail, sizeof(buftail))) | |
3040 | return NULL; | |
3041 | ||
3042 | callchain_store(entry, buftail.lr); | |
3043 | ||
3044 | /* | |
3045 | * Frame pointers should strictly progress back up the stack | |
3046 | * (towards higher addresses). | |
3047 | */ | |
3048 | if (tail >= buftail.fp) | |
3049 | return NULL; | |
3050 | ||
3051 | return buftail.fp - 1; | |
3052 | } | |
3053 | ||
3054 | static void | |
3055 | perf_callchain_user(struct pt_regs *regs, | |
3056 | struct perf_callchain_entry *entry) | |
3057 | { | |
3058 | struct frame_tail *tail; | |
3059 | ||
3060 | callchain_store(entry, PERF_CONTEXT_USER); | |
3061 | ||
3062 | if (!user_mode(regs)) | |
3063 | regs = task_pt_regs(current); | |
3064 | ||
3065 | tail = (struct frame_tail *)regs->ARM_fp - 1; | |
3066 | ||
3067 | while (tail && !((unsigned long)tail & 0x3)) | |
3068 | tail = user_backtrace(tail, entry); | |
3069 | } | |
3070 | ||
3071 | /* | |
3072 | * Gets called by walk_stackframe() for every stackframe. This will be called | |
3073 | * whist unwinding the stackframe and is like a subroutine return so we use | |
3074 | * the PC. | |
3075 | */ | |
3076 | static int | |
3077 | callchain_trace(struct stackframe *fr, | |
3078 | void *data) | |
3079 | { | |
3080 | struct perf_callchain_entry *entry = data; | |
3081 | callchain_store(entry, fr->pc); | |
3082 | return 0; | |
3083 | } | |
3084 | ||
3085 | static void | |
3086 | perf_callchain_kernel(struct pt_regs *regs, | |
3087 | struct perf_callchain_entry *entry) | |
3088 | { | |
3089 | struct stackframe fr; | |
3090 | ||
3091 | callchain_store(entry, PERF_CONTEXT_KERNEL); | |
3092 | fr.fp = regs->ARM_fp; | |
3093 | fr.sp = regs->ARM_sp; | |
3094 | fr.lr = regs->ARM_lr; | |
3095 | fr.pc = regs->ARM_pc; | |
3096 | walk_stackframe(&fr, callchain_trace, entry); | |
3097 | } | |
3098 | ||
3099 | static void | |
3100 | perf_do_callchain(struct pt_regs *regs, | |
3101 | struct perf_callchain_entry *entry) | |
3102 | { | |
3103 | int is_user; | |
3104 | ||
3105 | if (!regs) | |
3106 | return; | |
3107 | ||
3108 | is_user = user_mode(regs); | |
3109 | ||
3110 | if (!current || !current->pid) | |
3111 | return; | |
3112 | ||
3113 | if (is_user && current->state != TASK_RUNNING) | |
3114 | return; | |
3115 | ||
3116 | if (!is_user) | |
3117 | perf_callchain_kernel(regs, entry); | |
3118 | ||
3119 | if (current->mm) | |
3120 | perf_callchain_user(regs, entry); | |
3121 | } | |
3122 | ||
3123 | static DEFINE_PER_CPU(struct perf_callchain_entry, pmc_irq_entry); | |
3124 | ||
3125 | struct perf_callchain_entry * | |
3126 | perf_callchain(struct pt_regs *regs) | |
3127 | { | |
3128 | struct perf_callchain_entry *entry = &__get_cpu_var(pmc_irq_entry); | |
3129 | ||
3130 | entry->nr = 0; | |
3131 | perf_do_callchain(regs, entry); | |
3132 | return entry; | |
3133 | } |