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43eab878 WD |
1 | /* |
2 | * ARMv5 [xscale] Performance counter handling code. | |
3 | * | |
4 | * Copyright (C) 2010, ARM Ltd., Will Deacon <will.deacon@arm.com> | |
5 | * | |
6 | * Based on the previous xscale OProfile code. | |
7 | * | |
8 | * There are two variants of the xscale PMU that we support: | |
9 | * - xscale1pmu: 2 event counters and a cycle counter | |
10 | * - xscale2pmu: 4 event counters and a cycle counter | |
11 | * The two variants share event definitions, but have different | |
12 | * PMU structures. | |
13 | */ | |
14 | ||
15 | #ifdef CONFIG_CPU_XSCALE | |
16 | enum xscale_perf_types { | |
17 | XSCALE_PERFCTR_ICACHE_MISS = 0x00, | |
18 | XSCALE_PERFCTR_ICACHE_NO_DELIVER = 0x01, | |
19 | XSCALE_PERFCTR_DATA_STALL = 0x02, | |
20 | XSCALE_PERFCTR_ITLB_MISS = 0x03, | |
21 | XSCALE_PERFCTR_DTLB_MISS = 0x04, | |
22 | XSCALE_PERFCTR_BRANCH = 0x05, | |
23 | XSCALE_PERFCTR_BRANCH_MISS = 0x06, | |
24 | XSCALE_PERFCTR_INSTRUCTION = 0x07, | |
25 | XSCALE_PERFCTR_DCACHE_FULL_STALL = 0x08, | |
26 | XSCALE_PERFCTR_DCACHE_FULL_STALL_CONTIG = 0x09, | |
27 | XSCALE_PERFCTR_DCACHE_ACCESS = 0x0A, | |
28 | XSCALE_PERFCTR_DCACHE_MISS = 0x0B, | |
29 | XSCALE_PERFCTR_DCACHE_WRITE_BACK = 0x0C, | |
30 | XSCALE_PERFCTR_PC_CHANGED = 0x0D, | |
31 | XSCALE_PERFCTR_BCU_REQUEST = 0x10, | |
32 | XSCALE_PERFCTR_BCU_FULL = 0x11, | |
33 | XSCALE_PERFCTR_BCU_DRAIN = 0x12, | |
34 | XSCALE_PERFCTR_BCU_ECC_NO_ELOG = 0x14, | |
35 | XSCALE_PERFCTR_BCU_1_BIT_ERR = 0x15, | |
36 | XSCALE_PERFCTR_RMW = 0x16, | |
37 | /* XSCALE_PERFCTR_CCNT is not hardware defined */ | |
38 | XSCALE_PERFCTR_CCNT = 0xFE, | |
39 | XSCALE_PERFCTR_UNUSED = 0xFF, | |
40 | }; | |
41 | ||
42 | enum xscale_counters { | |
d2b41f74 | 43 | XSCALE_CYCLE_COUNTER = 0, |
43eab878 WD |
44 | XSCALE_COUNTER0, |
45 | XSCALE_COUNTER1, | |
46 | XSCALE_COUNTER2, | |
47 | XSCALE_COUNTER3, | |
48 | }; | |
49 | ||
50 | static const unsigned xscale_perf_map[PERF_COUNT_HW_MAX] = { | |
0445e7a5 WD |
51 | [PERF_COUNT_HW_CPU_CYCLES] = XSCALE_PERFCTR_CCNT, |
52 | [PERF_COUNT_HW_INSTRUCTIONS] = XSCALE_PERFCTR_INSTRUCTION, | |
53 | [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED, | |
54 | [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED, | |
55 | [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = XSCALE_PERFCTR_BRANCH, | |
56 | [PERF_COUNT_HW_BRANCH_MISSES] = XSCALE_PERFCTR_BRANCH_MISS, | |
57 | [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED, | |
58 | [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = XSCALE_PERFCTR_ICACHE_NO_DELIVER, | |
59 | [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = HW_OP_UNSUPPORTED, | |
43eab878 WD |
60 | }; |
61 | ||
62 | static const unsigned xscale_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] | |
63 | [PERF_COUNT_HW_CACHE_OP_MAX] | |
64 | [PERF_COUNT_HW_CACHE_RESULT_MAX] = { | |
65 | [C(L1D)] = { | |
66 | [C(OP_READ)] = { | |
67 | [C(RESULT_ACCESS)] = XSCALE_PERFCTR_DCACHE_ACCESS, | |
68 | [C(RESULT_MISS)] = XSCALE_PERFCTR_DCACHE_MISS, | |
69 | }, | |
70 | [C(OP_WRITE)] = { | |
71 | [C(RESULT_ACCESS)] = XSCALE_PERFCTR_DCACHE_ACCESS, | |
72 | [C(RESULT_MISS)] = XSCALE_PERFCTR_DCACHE_MISS, | |
73 | }, | |
74 | [C(OP_PREFETCH)] = { | |
75 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
76 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
77 | }, | |
78 | }, | |
79 | [C(L1I)] = { | |
80 | [C(OP_READ)] = { | |
81 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
82 | [C(RESULT_MISS)] = XSCALE_PERFCTR_ICACHE_MISS, | |
83 | }, | |
84 | [C(OP_WRITE)] = { | |
85 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
86 | [C(RESULT_MISS)] = XSCALE_PERFCTR_ICACHE_MISS, | |
87 | }, | |
88 | [C(OP_PREFETCH)] = { | |
89 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
90 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
91 | }, | |
92 | }, | |
93 | [C(LL)] = { | |
94 | [C(OP_READ)] = { | |
95 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
96 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
97 | }, | |
98 | [C(OP_WRITE)] = { | |
99 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
100 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
101 | }, | |
102 | [C(OP_PREFETCH)] = { | |
103 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
104 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
105 | }, | |
106 | }, | |
107 | [C(DTLB)] = { | |
108 | [C(OP_READ)] = { | |
109 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
110 | [C(RESULT_MISS)] = XSCALE_PERFCTR_DTLB_MISS, | |
111 | }, | |
112 | [C(OP_WRITE)] = { | |
113 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
114 | [C(RESULT_MISS)] = XSCALE_PERFCTR_DTLB_MISS, | |
115 | }, | |
116 | [C(OP_PREFETCH)] = { | |
117 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
118 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
119 | }, | |
120 | }, | |
121 | [C(ITLB)] = { | |
122 | [C(OP_READ)] = { | |
123 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
124 | [C(RESULT_MISS)] = XSCALE_PERFCTR_ITLB_MISS, | |
125 | }, | |
126 | [C(OP_WRITE)] = { | |
127 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
128 | [C(RESULT_MISS)] = XSCALE_PERFCTR_ITLB_MISS, | |
129 | }, | |
130 | [C(OP_PREFETCH)] = { | |
131 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
132 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
133 | }, | |
134 | }, | |
135 | [C(BPU)] = { | |
136 | [C(OP_READ)] = { | |
137 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
138 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
139 | }, | |
140 | [C(OP_WRITE)] = { | |
141 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
142 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
143 | }, | |
144 | [C(OP_PREFETCH)] = { | |
145 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
146 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
147 | }, | |
148 | }, | |
89d6c0b5 PZ |
149 | [C(NODE)] = { |
150 | [C(OP_READ)] = { | |
151 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
152 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
153 | }, | |
154 | [C(OP_WRITE)] = { | |
155 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
156 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
157 | }, | |
158 | [C(OP_PREFETCH)] = { | |
159 | [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, | |
160 | [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, | |
161 | }, | |
162 | }, | |
43eab878 WD |
163 | }; |
164 | ||
165 | #define XSCALE_PMU_ENABLE 0x001 | |
166 | #define XSCALE_PMN_RESET 0x002 | |
167 | #define XSCALE_CCNT_RESET 0x004 | |
168 | #define XSCALE_PMU_RESET (CCNT_RESET | PMN_RESET) | |
169 | #define XSCALE_PMU_CNT64 0x008 | |
170 | ||
171 | #define XSCALE1_OVERFLOWED_MASK 0x700 | |
172 | #define XSCALE1_CCOUNT_OVERFLOW 0x400 | |
173 | #define XSCALE1_COUNT0_OVERFLOW 0x100 | |
174 | #define XSCALE1_COUNT1_OVERFLOW 0x200 | |
175 | #define XSCALE1_CCOUNT_INT_EN 0x040 | |
176 | #define XSCALE1_COUNT0_INT_EN 0x010 | |
177 | #define XSCALE1_COUNT1_INT_EN 0x020 | |
178 | #define XSCALE1_COUNT0_EVT_SHFT 12 | |
179 | #define XSCALE1_COUNT0_EVT_MASK (0xff << XSCALE1_COUNT0_EVT_SHFT) | |
180 | #define XSCALE1_COUNT1_EVT_SHFT 20 | |
181 | #define XSCALE1_COUNT1_EVT_MASK (0xff << XSCALE1_COUNT1_EVT_SHFT) | |
182 | ||
183 | static inline u32 | |
184 | xscale1pmu_read_pmnc(void) | |
185 | { | |
186 | u32 val; | |
187 | asm volatile("mrc p14, 0, %0, c0, c0, 0" : "=r" (val)); | |
188 | return val; | |
189 | } | |
190 | ||
191 | static inline void | |
192 | xscale1pmu_write_pmnc(u32 val) | |
193 | { | |
194 | /* upper 4bits and 7, 11 are write-as-0 */ | |
195 | val &= 0xffff77f; | |
196 | asm volatile("mcr p14, 0, %0, c0, c0, 0" : : "r" (val)); | |
197 | } | |
198 | ||
199 | static inline int | |
200 | xscale1_pmnc_counter_has_overflowed(unsigned long pmnc, | |
201 | enum xscale_counters counter) | |
202 | { | |
203 | int ret = 0; | |
204 | ||
205 | switch (counter) { | |
206 | case XSCALE_CYCLE_COUNTER: | |
207 | ret = pmnc & XSCALE1_CCOUNT_OVERFLOW; | |
208 | break; | |
209 | case XSCALE_COUNTER0: | |
210 | ret = pmnc & XSCALE1_COUNT0_OVERFLOW; | |
211 | break; | |
212 | case XSCALE_COUNTER1: | |
213 | ret = pmnc & XSCALE1_COUNT1_OVERFLOW; | |
214 | break; | |
215 | default: | |
216 | WARN_ONCE(1, "invalid counter number (%d)\n", counter); | |
217 | } | |
218 | ||
219 | return ret; | |
220 | } | |
221 | ||
222 | static irqreturn_t | |
223 | xscale1pmu_handle_irq(int irq_num, void *dev) | |
224 | { | |
225 | unsigned long pmnc; | |
226 | struct perf_sample_data data; | |
8be3f9a2 | 227 | struct pmu_hw_events *cpuc; |
43eab878 WD |
228 | struct pt_regs *regs; |
229 | int idx; | |
230 | ||
231 | /* | |
232 | * NOTE: there's an A stepping erratum that states if an overflow | |
233 | * bit already exists and another occurs, the previous | |
234 | * Overflow bit gets cleared. There's no workaround. | |
235 | * Fixed in B stepping or later. | |
236 | */ | |
237 | pmnc = xscale1pmu_read_pmnc(); | |
238 | ||
239 | /* | |
240 | * Write the value back to clear the overflow flags. Overflow | |
241 | * flags remain in pmnc for use below. We also disable the PMU | |
242 | * while we process the interrupt. | |
243 | */ | |
244 | xscale1pmu_write_pmnc(pmnc & ~XSCALE_PMU_ENABLE); | |
245 | ||
246 | if (!(pmnc & XSCALE1_OVERFLOWED_MASK)) | |
247 | return IRQ_NONE; | |
248 | ||
249 | regs = get_irq_regs(); | |
250 | ||
43eab878 | 251 | cpuc = &__get_cpu_var(cpu_hw_events); |
8be3f9a2 | 252 | for (idx = 0; idx < cpu_pmu->num_events; ++idx) { |
43eab878 WD |
253 | struct perf_event *event = cpuc->events[idx]; |
254 | struct hw_perf_event *hwc; | |
255 | ||
f6f5a30c WD |
256 | if (!event) |
257 | continue; | |
258 | ||
43eab878 WD |
259 | if (!xscale1_pmnc_counter_has_overflowed(pmnc, idx)) |
260 | continue; | |
261 | ||
262 | hwc = &event->hw; | |
57273471 | 263 | armpmu_event_update(event, hwc, idx); |
fd0d000b | 264 | perf_sample_data_init(&data, 0, hwc->last_period); |
43eab878 WD |
265 | if (!armpmu_event_set_period(event, hwc, idx)) |
266 | continue; | |
267 | ||
a8b0ca17 | 268 | if (perf_event_overflow(event, &data, regs)) |
8be3f9a2 | 269 | cpu_pmu->disable(hwc, idx); |
43eab878 WD |
270 | } |
271 | ||
272 | irq_work_run(); | |
273 | ||
274 | /* | |
275 | * Re-enable the PMU. | |
276 | */ | |
277 | pmnc = xscale1pmu_read_pmnc() | XSCALE_PMU_ENABLE; | |
278 | xscale1pmu_write_pmnc(pmnc); | |
279 | ||
280 | return IRQ_HANDLED; | |
281 | } | |
282 | ||
283 | static void | |
284 | xscale1pmu_enable_event(struct hw_perf_event *hwc, int idx) | |
285 | { | |
286 | unsigned long val, mask, evt, flags; | |
8be3f9a2 | 287 | struct pmu_hw_events *events = cpu_pmu->get_hw_events(); |
43eab878 WD |
288 | |
289 | switch (idx) { | |
290 | case XSCALE_CYCLE_COUNTER: | |
291 | mask = 0; | |
292 | evt = XSCALE1_CCOUNT_INT_EN; | |
293 | break; | |
294 | case XSCALE_COUNTER0: | |
295 | mask = XSCALE1_COUNT0_EVT_MASK; | |
296 | evt = (hwc->config_base << XSCALE1_COUNT0_EVT_SHFT) | | |
297 | XSCALE1_COUNT0_INT_EN; | |
298 | break; | |
299 | case XSCALE_COUNTER1: | |
300 | mask = XSCALE1_COUNT1_EVT_MASK; | |
301 | evt = (hwc->config_base << XSCALE1_COUNT1_EVT_SHFT) | | |
302 | XSCALE1_COUNT1_INT_EN; | |
303 | break; | |
304 | default: | |
305 | WARN_ONCE(1, "invalid counter number (%d)\n", idx); | |
306 | return; | |
307 | } | |
308 | ||
0f78d2d5 | 309 | raw_spin_lock_irqsave(&events->pmu_lock, flags); |
43eab878 WD |
310 | val = xscale1pmu_read_pmnc(); |
311 | val &= ~mask; | |
312 | val |= evt; | |
313 | xscale1pmu_write_pmnc(val); | |
0f78d2d5 | 314 | raw_spin_unlock_irqrestore(&events->pmu_lock, flags); |
43eab878 WD |
315 | } |
316 | ||
317 | static void | |
318 | xscale1pmu_disable_event(struct hw_perf_event *hwc, int idx) | |
319 | { | |
320 | unsigned long val, mask, evt, flags; | |
8be3f9a2 | 321 | struct pmu_hw_events *events = cpu_pmu->get_hw_events(); |
43eab878 WD |
322 | |
323 | switch (idx) { | |
324 | case XSCALE_CYCLE_COUNTER: | |
325 | mask = XSCALE1_CCOUNT_INT_EN; | |
326 | evt = 0; | |
327 | break; | |
328 | case XSCALE_COUNTER0: | |
329 | mask = XSCALE1_COUNT0_INT_EN | XSCALE1_COUNT0_EVT_MASK; | |
330 | evt = XSCALE_PERFCTR_UNUSED << XSCALE1_COUNT0_EVT_SHFT; | |
331 | break; | |
332 | case XSCALE_COUNTER1: | |
333 | mask = XSCALE1_COUNT1_INT_EN | XSCALE1_COUNT1_EVT_MASK; | |
334 | evt = XSCALE_PERFCTR_UNUSED << XSCALE1_COUNT1_EVT_SHFT; | |
335 | break; | |
336 | default: | |
337 | WARN_ONCE(1, "invalid counter number (%d)\n", idx); | |
338 | return; | |
339 | } | |
340 | ||
0f78d2d5 | 341 | raw_spin_lock_irqsave(&events->pmu_lock, flags); |
43eab878 WD |
342 | val = xscale1pmu_read_pmnc(); |
343 | val &= ~mask; | |
344 | val |= evt; | |
345 | xscale1pmu_write_pmnc(val); | |
0f78d2d5 | 346 | raw_spin_unlock_irqrestore(&events->pmu_lock, flags); |
43eab878 WD |
347 | } |
348 | ||
349 | static int | |
8be3f9a2 | 350 | xscale1pmu_get_event_idx(struct pmu_hw_events *cpuc, |
43eab878 WD |
351 | struct hw_perf_event *event) |
352 | { | |
353 | if (XSCALE_PERFCTR_CCNT == event->config_base) { | |
354 | if (test_and_set_bit(XSCALE_CYCLE_COUNTER, cpuc->used_mask)) | |
355 | return -EAGAIN; | |
356 | ||
357 | return XSCALE_CYCLE_COUNTER; | |
358 | } else { | |
359 | if (!test_and_set_bit(XSCALE_COUNTER1, cpuc->used_mask)) | |
360 | return XSCALE_COUNTER1; | |
361 | ||
362 | if (!test_and_set_bit(XSCALE_COUNTER0, cpuc->used_mask)) | |
363 | return XSCALE_COUNTER0; | |
364 | ||
365 | return -EAGAIN; | |
366 | } | |
367 | } | |
368 | ||
369 | static void | |
370 | xscale1pmu_start(void) | |
371 | { | |
372 | unsigned long flags, val; | |
8be3f9a2 | 373 | struct pmu_hw_events *events = cpu_pmu->get_hw_events(); |
43eab878 | 374 | |
0f78d2d5 | 375 | raw_spin_lock_irqsave(&events->pmu_lock, flags); |
43eab878 WD |
376 | val = xscale1pmu_read_pmnc(); |
377 | val |= XSCALE_PMU_ENABLE; | |
378 | xscale1pmu_write_pmnc(val); | |
0f78d2d5 | 379 | raw_spin_unlock_irqrestore(&events->pmu_lock, flags); |
43eab878 WD |
380 | } |
381 | ||
382 | static void | |
383 | xscale1pmu_stop(void) | |
384 | { | |
385 | unsigned long flags, val; | |
8be3f9a2 | 386 | struct pmu_hw_events *events = cpu_pmu->get_hw_events(); |
43eab878 | 387 | |
0f78d2d5 | 388 | raw_spin_lock_irqsave(&events->pmu_lock, flags); |
43eab878 WD |
389 | val = xscale1pmu_read_pmnc(); |
390 | val &= ~XSCALE_PMU_ENABLE; | |
391 | xscale1pmu_write_pmnc(val); | |
0f78d2d5 | 392 | raw_spin_unlock_irqrestore(&events->pmu_lock, flags); |
43eab878 WD |
393 | } |
394 | ||
395 | static inline u32 | |
396 | xscale1pmu_read_counter(int counter) | |
397 | { | |
398 | u32 val = 0; | |
399 | ||
400 | switch (counter) { | |
401 | case XSCALE_CYCLE_COUNTER: | |
402 | asm volatile("mrc p14, 0, %0, c1, c0, 0" : "=r" (val)); | |
403 | break; | |
404 | case XSCALE_COUNTER0: | |
405 | asm volatile("mrc p14, 0, %0, c2, c0, 0" : "=r" (val)); | |
406 | break; | |
407 | case XSCALE_COUNTER1: | |
408 | asm volatile("mrc p14, 0, %0, c3, c0, 0" : "=r" (val)); | |
409 | break; | |
410 | } | |
411 | ||
412 | return val; | |
413 | } | |
414 | ||
415 | static inline void | |
416 | xscale1pmu_write_counter(int counter, u32 val) | |
417 | { | |
418 | switch (counter) { | |
419 | case XSCALE_CYCLE_COUNTER: | |
420 | asm volatile("mcr p14, 0, %0, c1, c0, 0" : : "r" (val)); | |
421 | break; | |
422 | case XSCALE_COUNTER0: | |
423 | asm volatile("mcr p14, 0, %0, c2, c0, 0" : : "r" (val)); | |
424 | break; | |
425 | case XSCALE_COUNTER1: | |
426 | asm volatile("mcr p14, 0, %0, c3, c0, 0" : : "r" (val)); | |
427 | break; | |
428 | } | |
429 | } | |
430 | ||
e1f431b5 MR |
431 | static int xscale_map_event(struct perf_event *event) |
432 | { | |
433 | return map_cpu_event(event, &xscale_perf_map, | |
434 | &xscale_perf_cache_map, 0xFF); | |
435 | } | |
436 | ||
a6c93afe | 437 | static struct arm_pmu xscale1pmu = { |
43eab878 WD |
438 | .id = ARM_PERF_PMU_ID_XSCALE1, |
439 | .name = "xscale1", | |
440 | .handle_irq = xscale1pmu_handle_irq, | |
441 | .enable = xscale1pmu_enable_event, | |
442 | .disable = xscale1pmu_disable_event, | |
443 | .read_counter = xscale1pmu_read_counter, | |
444 | .write_counter = xscale1pmu_write_counter, | |
445 | .get_event_idx = xscale1pmu_get_event_idx, | |
446 | .start = xscale1pmu_start, | |
447 | .stop = xscale1pmu_stop, | |
e1f431b5 | 448 | .map_event = xscale_map_event, |
43eab878 WD |
449 | .num_events = 3, |
450 | .max_period = (1LLU << 32) - 1, | |
451 | }; | |
452 | ||
a6c93afe | 453 | static struct arm_pmu *__init xscale1pmu_init(void) |
43eab878 WD |
454 | { |
455 | return &xscale1pmu; | |
456 | } | |
457 | ||
458 | #define XSCALE2_OVERFLOWED_MASK 0x01f | |
459 | #define XSCALE2_CCOUNT_OVERFLOW 0x001 | |
460 | #define XSCALE2_COUNT0_OVERFLOW 0x002 | |
461 | #define XSCALE2_COUNT1_OVERFLOW 0x004 | |
462 | #define XSCALE2_COUNT2_OVERFLOW 0x008 | |
463 | #define XSCALE2_COUNT3_OVERFLOW 0x010 | |
464 | #define XSCALE2_CCOUNT_INT_EN 0x001 | |
465 | #define XSCALE2_COUNT0_INT_EN 0x002 | |
466 | #define XSCALE2_COUNT1_INT_EN 0x004 | |
467 | #define XSCALE2_COUNT2_INT_EN 0x008 | |
468 | #define XSCALE2_COUNT3_INT_EN 0x010 | |
469 | #define XSCALE2_COUNT0_EVT_SHFT 0 | |
470 | #define XSCALE2_COUNT0_EVT_MASK (0xff << XSCALE2_COUNT0_EVT_SHFT) | |
471 | #define XSCALE2_COUNT1_EVT_SHFT 8 | |
472 | #define XSCALE2_COUNT1_EVT_MASK (0xff << XSCALE2_COUNT1_EVT_SHFT) | |
473 | #define XSCALE2_COUNT2_EVT_SHFT 16 | |
474 | #define XSCALE2_COUNT2_EVT_MASK (0xff << XSCALE2_COUNT2_EVT_SHFT) | |
475 | #define XSCALE2_COUNT3_EVT_SHFT 24 | |
476 | #define XSCALE2_COUNT3_EVT_MASK (0xff << XSCALE2_COUNT3_EVT_SHFT) | |
477 | ||
478 | static inline u32 | |
479 | xscale2pmu_read_pmnc(void) | |
480 | { | |
481 | u32 val; | |
482 | asm volatile("mrc p14, 0, %0, c0, c1, 0" : "=r" (val)); | |
483 | /* bits 1-2 and 4-23 are read-unpredictable */ | |
484 | return val & 0xff000009; | |
485 | } | |
486 | ||
487 | static inline void | |
488 | xscale2pmu_write_pmnc(u32 val) | |
489 | { | |
490 | /* bits 4-23 are write-as-0, 24-31 are write ignored */ | |
491 | val &= 0xf; | |
492 | asm volatile("mcr p14, 0, %0, c0, c1, 0" : : "r" (val)); | |
493 | } | |
494 | ||
495 | static inline u32 | |
496 | xscale2pmu_read_overflow_flags(void) | |
497 | { | |
498 | u32 val; | |
499 | asm volatile("mrc p14, 0, %0, c5, c1, 0" : "=r" (val)); | |
500 | return val; | |
501 | } | |
502 | ||
503 | static inline void | |
504 | xscale2pmu_write_overflow_flags(u32 val) | |
505 | { | |
506 | asm volatile("mcr p14, 0, %0, c5, c1, 0" : : "r" (val)); | |
507 | } | |
508 | ||
509 | static inline u32 | |
510 | xscale2pmu_read_event_select(void) | |
511 | { | |
512 | u32 val; | |
513 | asm volatile("mrc p14, 0, %0, c8, c1, 0" : "=r" (val)); | |
514 | return val; | |
515 | } | |
516 | ||
517 | static inline void | |
518 | xscale2pmu_write_event_select(u32 val) | |
519 | { | |
520 | asm volatile("mcr p14, 0, %0, c8, c1, 0" : : "r"(val)); | |
521 | } | |
522 | ||
523 | static inline u32 | |
524 | xscale2pmu_read_int_enable(void) | |
525 | { | |
526 | u32 val; | |
527 | asm volatile("mrc p14, 0, %0, c4, c1, 0" : "=r" (val)); | |
528 | return val; | |
529 | } | |
530 | ||
531 | static void | |
532 | xscale2pmu_write_int_enable(u32 val) | |
533 | { | |
534 | asm volatile("mcr p14, 0, %0, c4, c1, 0" : : "r" (val)); | |
535 | } | |
536 | ||
537 | static inline int | |
538 | xscale2_pmnc_counter_has_overflowed(unsigned long of_flags, | |
539 | enum xscale_counters counter) | |
540 | { | |
541 | int ret = 0; | |
542 | ||
543 | switch (counter) { | |
544 | case XSCALE_CYCLE_COUNTER: | |
545 | ret = of_flags & XSCALE2_CCOUNT_OVERFLOW; | |
546 | break; | |
547 | case XSCALE_COUNTER0: | |
548 | ret = of_flags & XSCALE2_COUNT0_OVERFLOW; | |
549 | break; | |
550 | case XSCALE_COUNTER1: | |
551 | ret = of_flags & XSCALE2_COUNT1_OVERFLOW; | |
552 | break; | |
553 | case XSCALE_COUNTER2: | |
554 | ret = of_flags & XSCALE2_COUNT2_OVERFLOW; | |
555 | break; | |
556 | case XSCALE_COUNTER3: | |
557 | ret = of_flags & XSCALE2_COUNT3_OVERFLOW; | |
558 | break; | |
559 | default: | |
560 | WARN_ONCE(1, "invalid counter number (%d)\n", counter); | |
561 | } | |
562 | ||
563 | return ret; | |
564 | } | |
565 | ||
566 | static irqreturn_t | |
567 | xscale2pmu_handle_irq(int irq_num, void *dev) | |
568 | { | |
569 | unsigned long pmnc, of_flags; | |
570 | struct perf_sample_data data; | |
8be3f9a2 | 571 | struct pmu_hw_events *cpuc; |
43eab878 WD |
572 | struct pt_regs *regs; |
573 | int idx; | |
574 | ||
575 | /* Disable the PMU. */ | |
576 | pmnc = xscale2pmu_read_pmnc(); | |
577 | xscale2pmu_write_pmnc(pmnc & ~XSCALE_PMU_ENABLE); | |
578 | ||
579 | /* Check the overflow flag register. */ | |
580 | of_flags = xscale2pmu_read_overflow_flags(); | |
581 | if (!(of_flags & XSCALE2_OVERFLOWED_MASK)) | |
582 | return IRQ_NONE; | |
583 | ||
584 | /* Clear the overflow bits. */ | |
585 | xscale2pmu_write_overflow_flags(of_flags); | |
586 | ||
587 | regs = get_irq_regs(); | |
588 | ||
43eab878 | 589 | cpuc = &__get_cpu_var(cpu_hw_events); |
8be3f9a2 | 590 | for (idx = 0; idx < cpu_pmu->num_events; ++idx) { |
43eab878 WD |
591 | struct perf_event *event = cpuc->events[idx]; |
592 | struct hw_perf_event *hwc; | |
593 | ||
f6f5a30c WD |
594 | if (!event) |
595 | continue; | |
596 | ||
3f31ae12 | 597 | if (!xscale2_pmnc_counter_has_overflowed(of_flags, idx)) |
43eab878 WD |
598 | continue; |
599 | ||
600 | hwc = &event->hw; | |
57273471 | 601 | armpmu_event_update(event, hwc, idx); |
fd0d000b | 602 | perf_sample_data_init(&data, 0, hwc->last_period); |
43eab878 WD |
603 | if (!armpmu_event_set_period(event, hwc, idx)) |
604 | continue; | |
605 | ||
a8b0ca17 | 606 | if (perf_event_overflow(event, &data, regs)) |
8be3f9a2 | 607 | cpu_pmu->disable(hwc, idx); |
43eab878 WD |
608 | } |
609 | ||
610 | irq_work_run(); | |
611 | ||
612 | /* | |
613 | * Re-enable the PMU. | |
614 | */ | |
615 | pmnc = xscale2pmu_read_pmnc() | XSCALE_PMU_ENABLE; | |
616 | xscale2pmu_write_pmnc(pmnc); | |
617 | ||
618 | return IRQ_HANDLED; | |
619 | } | |
620 | ||
621 | static void | |
622 | xscale2pmu_enable_event(struct hw_perf_event *hwc, int idx) | |
623 | { | |
624 | unsigned long flags, ien, evtsel; | |
8be3f9a2 | 625 | struct pmu_hw_events *events = cpu_pmu->get_hw_events(); |
43eab878 WD |
626 | |
627 | ien = xscale2pmu_read_int_enable(); | |
628 | evtsel = xscale2pmu_read_event_select(); | |
629 | ||
630 | switch (idx) { | |
631 | case XSCALE_CYCLE_COUNTER: | |
632 | ien |= XSCALE2_CCOUNT_INT_EN; | |
633 | break; | |
634 | case XSCALE_COUNTER0: | |
635 | ien |= XSCALE2_COUNT0_INT_EN; | |
636 | evtsel &= ~XSCALE2_COUNT0_EVT_MASK; | |
637 | evtsel |= hwc->config_base << XSCALE2_COUNT0_EVT_SHFT; | |
638 | break; | |
639 | case XSCALE_COUNTER1: | |
640 | ien |= XSCALE2_COUNT1_INT_EN; | |
641 | evtsel &= ~XSCALE2_COUNT1_EVT_MASK; | |
642 | evtsel |= hwc->config_base << XSCALE2_COUNT1_EVT_SHFT; | |
643 | break; | |
644 | case XSCALE_COUNTER2: | |
645 | ien |= XSCALE2_COUNT2_INT_EN; | |
646 | evtsel &= ~XSCALE2_COUNT2_EVT_MASK; | |
647 | evtsel |= hwc->config_base << XSCALE2_COUNT2_EVT_SHFT; | |
648 | break; | |
649 | case XSCALE_COUNTER3: | |
650 | ien |= XSCALE2_COUNT3_INT_EN; | |
651 | evtsel &= ~XSCALE2_COUNT3_EVT_MASK; | |
652 | evtsel |= hwc->config_base << XSCALE2_COUNT3_EVT_SHFT; | |
653 | break; | |
654 | default: | |
655 | WARN_ONCE(1, "invalid counter number (%d)\n", idx); | |
656 | return; | |
657 | } | |
658 | ||
0f78d2d5 | 659 | raw_spin_lock_irqsave(&events->pmu_lock, flags); |
43eab878 WD |
660 | xscale2pmu_write_event_select(evtsel); |
661 | xscale2pmu_write_int_enable(ien); | |
0f78d2d5 | 662 | raw_spin_unlock_irqrestore(&events->pmu_lock, flags); |
43eab878 WD |
663 | } |
664 | ||
665 | static void | |
666 | xscale2pmu_disable_event(struct hw_perf_event *hwc, int idx) | |
667 | { | |
3f31ae12 | 668 | unsigned long flags, ien, evtsel, of_flags; |
8be3f9a2 | 669 | struct pmu_hw_events *events = cpu_pmu->get_hw_events(); |
43eab878 WD |
670 | |
671 | ien = xscale2pmu_read_int_enable(); | |
672 | evtsel = xscale2pmu_read_event_select(); | |
673 | ||
674 | switch (idx) { | |
675 | case XSCALE_CYCLE_COUNTER: | |
676 | ien &= ~XSCALE2_CCOUNT_INT_EN; | |
3f31ae12 | 677 | of_flags = XSCALE2_CCOUNT_OVERFLOW; |
43eab878 WD |
678 | break; |
679 | case XSCALE_COUNTER0: | |
680 | ien &= ~XSCALE2_COUNT0_INT_EN; | |
681 | evtsel &= ~XSCALE2_COUNT0_EVT_MASK; | |
682 | evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT0_EVT_SHFT; | |
3f31ae12 | 683 | of_flags = XSCALE2_COUNT0_OVERFLOW; |
43eab878 WD |
684 | break; |
685 | case XSCALE_COUNTER1: | |
686 | ien &= ~XSCALE2_COUNT1_INT_EN; | |
687 | evtsel &= ~XSCALE2_COUNT1_EVT_MASK; | |
688 | evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT1_EVT_SHFT; | |
3f31ae12 | 689 | of_flags = XSCALE2_COUNT1_OVERFLOW; |
43eab878 WD |
690 | break; |
691 | case XSCALE_COUNTER2: | |
692 | ien &= ~XSCALE2_COUNT2_INT_EN; | |
693 | evtsel &= ~XSCALE2_COUNT2_EVT_MASK; | |
694 | evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT2_EVT_SHFT; | |
3f31ae12 | 695 | of_flags = XSCALE2_COUNT2_OVERFLOW; |
43eab878 WD |
696 | break; |
697 | case XSCALE_COUNTER3: | |
698 | ien &= ~XSCALE2_COUNT3_INT_EN; | |
699 | evtsel &= ~XSCALE2_COUNT3_EVT_MASK; | |
700 | evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT3_EVT_SHFT; | |
3f31ae12 | 701 | of_flags = XSCALE2_COUNT3_OVERFLOW; |
43eab878 WD |
702 | break; |
703 | default: | |
704 | WARN_ONCE(1, "invalid counter number (%d)\n", idx); | |
705 | return; | |
706 | } | |
707 | ||
0f78d2d5 | 708 | raw_spin_lock_irqsave(&events->pmu_lock, flags); |
43eab878 WD |
709 | xscale2pmu_write_event_select(evtsel); |
710 | xscale2pmu_write_int_enable(ien); | |
3f31ae12 | 711 | xscale2pmu_write_overflow_flags(of_flags); |
0f78d2d5 | 712 | raw_spin_unlock_irqrestore(&events->pmu_lock, flags); |
43eab878 WD |
713 | } |
714 | ||
715 | static int | |
8be3f9a2 | 716 | xscale2pmu_get_event_idx(struct pmu_hw_events *cpuc, |
43eab878 WD |
717 | struct hw_perf_event *event) |
718 | { | |
719 | int idx = xscale1pmu_get_event_idx(cpuc, event); | |
720 | if (idx >= 0) | |
721 | goto out; | |
722 | ||
723 | if (!test_and_set_bit(XSCALE_COUNTER3, cpuc->used_mask)) | |
724 | idx = XSCALE_COUNTER3; | |
725 | else if (!test_and_set_bit(XSCALE_COUNTER2, cpuc->used_mask)) | |
726 | idx = XSCALE_COUNTER2; | |
727 | out: | |
728 | return idx; | |
729 | } | |
730 | ||
731 | static void | |
732 | xscale2pmu_start(void) | |
733 | { | |
734 | unsigned long flags, val; | |
8be3f9a2 | 735 | struct pmu_hw_events *events = cpu_pmu->get_hw_events(); |
43eab878 | 736 | |
0f78d2d5 | 737 | raw_spin_lock_irqsave(&events->pmu_lock, flags); |
43eab878 WD |
738 | val = xscale2pmu_read_pmnc() & ~XSCALE_PMU_CNT64; |
739 | val |= XSCALE_PMU_ENABLE; | |
740 | xscale2pmu_write_pmnc(val); | |
0f78d2d5 | 741 | raw_spin_unlock_irqrestore(&events->pmu_lock, flags); |
43eab878 WD |
742 | } |
743 | ||
744 | static void | |
745 | xscale2pmu_stop(void) | |
746 | { | |
747 | unsigned long flags, val; | |
8be3f9a2 | 748 | struct pmu_hw_events *events = cpu_pmu->get_hw_events(); |
43eab878 | 749 | |
0f78d2d5 | 750 | raw_spin_lock_irqsave(&events->pmu_lock, flags); |
43eab878 WD |
751 | val = xscale2pmu_read_pmnc(); |
752 | val &= ~XSCALE_PMU_ENABLE; | |
753 | xscale2pmu_write_pmnc(val); | |
0f78d2d5 | 754 | raw_spin_unlock_irqrestore(&events->pmu_lock, flags); |
43eab878 WD |
755 | } |
756 | ||
757 | static inline u32 | |
758 | xscale2pmu_read_counter(int counter) | |
759 | { | |
760 | u32 val = 0; | |
761 | ||
762 | switch (counter) { | |
763 | case XSCALE_CYCLE_COUNTER: | |
764 | asm volatile("mrc p14, 0, %0, c1, c1, 0" : "=r" (val)); | |
765 | break; | |
766 | case XSCALE_COUNTER0: | |
767 | asm volatile("mrc p14, 0, %0, c0, c2, 0" : "=r" (val)); | |
768 | break; | |
769 | case XSCALE_COUNTER1: | |
770 | asm volatile("mrc p14, 0, %0, c1, c2, 0" : "=r" (val)); | |
771 | break; | |
772 | case XSCALE_COUNTER2: | |
773 | asm volatile("mrc p14, 0, %0, c2, c2, 0" : "=r" (val)); | |
774 | break; | |
775 | case XSCALE_COUNTER3: | |
776 | asm volatile("mrc p14, 0, %0, c3, c2, 0" : "=r" (val)); | |
777 | break; | |
778 | } | |
779 | ||
780 | return val; | |
781 | } | |
782 | ||
783 | static inline void | |
784 | xscale2pmu_write_counter(int counter, u32 val) | |
785 | { | |
786 | switch (counter) { | |
787 | case XSCALE_CYCLE_COUNTER: | |
788 | asm volatile("mcr p14, 0, %0, c1, c1, 0" : : "r" (val)); | |
789 | break; | |
790 | case XSCALE_COUNTER0: | |
791 | asm volatile("mcr p14, 0, %0, c0, c2, 0" : : "r" (val)); | |
792 | break; | |
793 | case XSCALE_COUNTER1: | |
794 | asm volatile("mcr p14, 0, %0, c1, c2, 0" : : "r" (val)); | |
795 | break; | |
796 | case XSCALE_COUNTER2: | |
797 | asm volatile("mcr p14, 0, %0, c2, c2, 0" : : "r" (val)); | |
798 | break; | |
799 | case XSCALE_COUNTER3: | |
800 | asm volatile("mcr p14, 0, %0, c3, c2, 0" : : "r" (val)); | |
801 | break; | |
802 | } | |
803 | } | |
804 | ||
a6c93afe | 805 | static struct arm_pmu xscale2pmu = { |
43eab878 WD |
806 | .id = ARM_PERF_PMU_ID_XSCALE2, |
807 | .name = "xscale2", | |
808 | .handle_irq = xscale2pmu_handle_irq, | |
809 | .enable = xscale2pmu_enable_event, | |
810 | .disable = xscale2pmu_disable_event, | |
811 | .read_counter = xscale2pmu_read_counter, | |
812 | .write_counter = xscale2pmu_write_counter, | |
813 | .get_event_idx = xscale2pmu_get_event_idx, | |
814 | .start = xscale2pmu_start, | |
815 | .stop = xscale2pmu_stop, | |
e1f431b5 | 816 | .map_event = xscale_map_event, |
43eab878 WD |
817 | .num_events = 5, |
818 | .max_period = (1LLU << 32) - 1, | |
819 | }; | |
820 | ||
a6c93afe | 821 | static struct arm_pmu *__init xscale2pmu_init(void) |
43eab878 WD |
822 | { |
823 | return &xscale2pmu; | |
824 | } | |
825 | #else | |
a6c93afe | 826 | static struct arm_pmu *__init xscale1pmu_init(void) |
43eab878 WD |
827 | { |
828 | return NULL; | |
829 | } | |
830 | ||
a6c93afe | 831 | static struct arm_pmu *__init xscale2pmu_init(void) |
43eab878 WD |
832 | { |
833 | return NULL; | |
834 | } | |
835 | #endif /* CONFIG_CPU_XSCALE */ |