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staging: rts_pstor: dont cast void* from kmalloc()
[linux-2.6.git] / arch / arm / kernel / perf_event_v7.c
blob4c851834f68e57b2038fbfd35741898e9d03a124
1 /*
2 * ARMv7 Cortex-A8 and Cortex-A9 Performance Events handling code.
3 *
4 * ARMv7 support: Jean Pihet <jpihet@mvista.com>
5 * 2010 (c) MontaVista Software, LLC.
6 *
7 * Copied from ARMv6 code, with the low level code inspired
8 * by the ARMv7 Oprofile code.
9 *
10 * Cortex-A8 has up to 4 configurable performance counters and
11 * a single cycle counter.
12 * Cortex-A9 has up to 31 configurable performance counters and
13 * a single cycle counter.
14 *
15 * All counters can be enabled/disabled and IRQ masked separately. The cycle
16 * counter and all 4 performance counters together can be reset separately.
17 */
18
19 #ifdef CONFIG_CPU_V7
20 /*
21 * Common ARMv7 event types
22 *
23 * Note: An implementation may not be able to count all of these events
24 * but the encodings are considered to be `reserved' in the case that
25 * they are not available.
26 */
27 enum armv7_perf_types {
28 ARMV7_PERFCTR_PMNC_SW_INCR = 0x00,
29 ARMV7_PERFCTR_IFETCH_MISS = 0x01,
30 ARMV7_PERFCTR_ITLB_MISS = 0x02,
31 ARMV7_PERFCTR_DCACHE_REFILL = 0x03, /* L1 */
32 ARMV7_PERFCTR_DCACHE_ACCESS = 0x04, /* L1 */
33 ARMV7_PERFCTR_DTLB_REFILL = 0x05,
34 ARMV7_PERFCTR_DREAD = 0x06,
35 ARMV7_PERFCTR_DWRITE = 0x07,
36 ARMV7_PERFCTR_INSTR_EXECUTED = 0x08,
37 ARMV7_PERFCTR_EXC_TAKEN = 0x09,
38 ARMV7_PERFCTR_EXC_EXECUTED = 0x0A,
39 ARMV7_PERFCTR_CID_WRITE = 0x0B,
40 /* ARMV7_PERFCTR_PC_WRITE is equivalent to HW_BRANCH_INSTRUCTIONS.
41 * It counts:
42 * - all branch instructions,
43 * - instructions that explicitly write the PC,
44 * - exception generating instructions.
45 */
46 ARMV7_PERFCTR_PC_WRITE = 0x0C,
47 ARMV7_PERFCTR_PC_IMM_BRANCH = 0x0D,
48 ARMV7_PERFCTR_PC_PROC_RETURN = 0x0E,
49 ARMV7_PERFCTR_UNALIGNED_ACCESS = 0x0F,
50
51 /* These events are defined by the PMUv2 supplement (ARM DDI 0457A). */
52 ARMV7_PERFCTR_PC_BRANCH_MIS_PRED = 0x10,
53 ARMV7_PERFCTR_CLOCK_CYCLES = 0x11,
54 ARMV7_PERFCTR_PC_BRANCH_PRED = 0x12,
55 ARMV7_PERFCTR_MEM_ACCESS = 0x13,
56 ARMV7_PERFCTR_L1_ICACHE_ACCESS = 0x14,
57 ARMV7_PERFCTR_L1_DCACHE_WB = 0x15,
58 ARMV7_PERFCTR_L2_DCACHE_ACCESS = 0x16,
59 ARMV7_PERFCTR_L2_DCACHE_REFILL = 0x17,
60 ARMV7_PERFCTR_L2_DCACHE_WB = 0x18,
61 ARMV7_PERFCTR_BUS_ACCESS = 0x19,
62 ARMV7_PERFCTR_MEMORY_ERROR = 0x1A,
63 ARMV7_PERFCTR_INSTR_SPEC = 0x1B,
64 ARMV7_PERFCTR_TTBR_WRITE = 0x1C,
65 ARMV7_PERFCTR_BUS_CYCLES = 0x1D,
66
67 ARMV7_PERFCTR_CPU_CYCLES = 0xFF
68 };
69
70 /* ARMv7 Cortex-A8 specific event types */
71 enum armv7_a8_perf_types {
72 ARMV7_PERFCTR_WRITE_BUFFER_FULL = 0x40,
73 ARMV7_PERFCTR_L2_STORE_MERGED = 0x41,
74 ARMV7_PERFCTR_L2_STORE_BUFF = 0x42,
75 ARMV7_PERFCTR_L2_ACCESS = 0x43,
76 ARMV7_PERFCTR_L2_CACH_MISS = 0x44,
77 ARMV7_PERFCTR_AXI_READ_CYCLES = 0x45,
78 ARMV7_PERFCTR_AXI_WRITE_CYCLES = 0x46,
79 ARMV7_PERFCTR_MEMORY_REPLAY = 0x47,
80 ARMV7_PERFCTR_UNALIGNED_ACCESS_REPLAY = 0x48,
81 ARMV7_PERFCTR_L1_DATA_MISS = 0x49,
82 ARMV7_PERFCTR_L1_INST_MISS = 0x4A,
83 ARMV7_PERFCTR_L1_DATA_COLORING = 0x4B,
84 ARMV7_PERFCTR_L1_NEON_DATA = 0x4C,
85 ARMV7_PERFCTR_L1_NEON_CACH_DATA = 0x4D,
86 ARMV7_PERFCTR_L2_NEON = 0x4E,
87 ARMV7_PERFCTR_L2_NEON_HIT = 0x4F,
88 ARMV7_PERFCTR_L1_INST = 0x50,
89 ARMV7_PERFCTR_PC_RETURN_MIS_PRED = 0x51,
90 ARMV7_PERFCTR_PC_BRANCH_FAILED = 0x52,
91 ARMV7_PERFCTR_PC_BRANCH_TAKEN = 0x53,
92 ARMV7_PERFCTR_PC_BRANCH_EXECUTED = 0x54,
93 ARMV7_PERFCTR_OP_EXECUTED = 0x55,
94 ARMV7_PERFCTR_CYCLES_INST_STALL = 0x56,
95 ARMV7_PERFCTR_CYCLES_INST = 0x57,
96 ARMV7_PERFCTR_CYCLES_NEON_DATA_STALL = 0x58,
97 ARMV7_PERFCTR_CYCLES_NEON_INST_STALL = 0x59,
98 ARMV7_PERFCTR_NEON_CYCLES = 0x5A,
99
100 ARMV7_PERFCTR_PMU0_EVENTS = 0x70,
101 ARMV7_PERFCTR_PMU1_EVENTS = 0x71,
102 ARMV7_PERFCTR_PMU_EVENTS = 0x72,
103 };
104
105 /* ARMv7 Cortex-A9 specific event types */
106 enum armv7_a9_perf_types {
107 ARMV7_PERFCTR_JAVA_HW_BYTECODE_EXEC = 0x40,
108 ARMV7_PERFCTR_JAVA_SW_BYTECODE_EXEC = 0x41,
109 ARMV7_PERFCTR_JAZELLE_BRANCH_EXEC = 0x42,
110
111 ARMV7_PERFCTR_COHERENT_LINE_MISS = 0x50,
112 ARMV7_PERFCTR_COHERENT_LINE_HIT = 0x51,
113
114 ARMV7_PERFCTR_ICACHE_DEP_STALL_CYCLES = 0x60,
115 ARMV7_PERFCTR_DCACHE_DEP_STALL_CYCLES = 0x61,
116 ARMV7_PERFCTR_TLB_MISS_DEP_STALL_CYCLES = 0x62,
117 ARMV7_PERFCTR_STREX_EXECUTED_PASSED = 0x63,
118 ARMV7_PERFCTR_STREX_EXECUTED_FAILED = 0x64,
119 ARMV7_PERFCTR_DATA_EVICTION = 0x65,
120 ARMV7_PERFCTR_ISSUE_STAGE_NO_INST = 0x66,
121 ARMV7_PERFCTR_ISSUE_STAGE_EMPTY = 0x67,
122 ARMV7_PERFCTR_INST_OUT_OF_RENAME_STAGE = 0x68,
123
124 ARMV7_PERFCTR_PREDICTABLE_FUNCT_RETURNS = 0x6E,
125
126 ARMV7_PERFCTR_MAIN_UNIT_EXECUTED_INST = 0x70,
127 ARMV7_PERFCTR_SECOND_UNIT_EXECUTED_INST = 0x71,
128 ARMV7_PERFCTR_LD_ST_UNIT_EXECUTED_INST = 0x72,
129 ARMV7_PERFCTR_FP_EXECUTED_INST = 0x73,
130 ARMV7_PERFCTR_NEON_EXECUTED_INST = 0x74,
131
132 ARMV7_PERFCTR_PLD_FULL_DEP_STALL_CYCLES = 0x80,
133 ARMV7_PERFCTR_DATA_WR_DEP_STALL_CYCLES = 0x81,
134 ARMV7_PERFCTR_ITLB_MISS_DEP_STALL_CYCLES = 0x82,
135 ARMV7_PERFCTR_DTLB_MISS_DEP_STALL_CYCLES = 0x83,
136 ARMV7_PERFCTR_MICRO_ITLB_MISS_DEP_STALL_CYCLES = 0x84,
137 ARMV7_PERFCTR_MICRO_DTLB_MISS_DEP_STALL_CYCLES = 0x85,
138 ARMV7_PERFCTR_DMB_DEP_STALL_CYCLES = 0x86,
139
140 ARMV7_PERFCTR_INTGR_CLK_ENABLED_CYCLES = 0x8A,
141 ARMV7_PERFCTR_DATA_ENGINE_CLK_EN_CYCLES = 0x8B,
142
143 ARMV7_PERFCTR_ISB_INST = 0x90,
144 ARMV7_PERFCTR_DSB_INST = 0x91,
145 ARMV7_PERFCTR_DMB_INST = 0x92,
146 ARMV7_PERFCTR_EXT_INTERRUPTS = 0x93,
147
148 ARMV7_PERFCTR_PLE_CACHE_LINE_RQST_COMPLETED = 0xA0,
149 ARMV7_PERFCTR_PLE_CACHE_LINE_RQST_SKIPPED = 0xA1,
150 ARMV7_PERFCTR_PLE_FIFO_FLUSH = 0xA2,
151 ARMV7_PERFCTR_PLE_RQST_COMPLETED = 0xA3,
152 ARMV7_PERFCTR_PLE_FIFO_OVERFLOW = 0xA4,
153 ARMV7_PERFCTR_PLE_RQST_PROG = 0xA5
154 };
155
156 /* ARMv7 Cortex-A5 specific event types */
157 enum armv7_a5_perf_types {
158 ARMV7_PERFCTR_IRQ_TAKEN = 0x86,
159 ARMV7_PERFCTR_FIQ_TAKEN = 0x87,
160
161 ARMV7_PERFCTR_EXT_MEM_RQST = 0xc0,
162 ARMV7_PERFCTR_NC_EXT_MEM_RQST = 0xc1,
163 ARMV7_PERFCTR_PREFETCH_LINEFILL = 0xc2,
164 ARMV7_PERFCTR_PREFETCH_LINEFILL_DROP = 0xc3,
165 ARMV7_PERFCTR_ENTER_READ_ALLOC = 0xc4,
166 ARMV7_PERFCTR_READ_ALLOC = 0xc5,
167
168 ARMV7_PERFCTR_STALL_SB_FULL = 0xc9,
169 };
170
171 /* ARMv7 Cortex-A15 specific event types */
172 enum armv7_a15_perf_types {
173 ARMV7_PERFCTR_L1_DCACHE_READ_ACCESS = 0x40,
174 ARMV7_PERFCTR_L1_DCACHE_WRITE_ACCESS = 0x41,
175 ARMV7_PERFCTR_L1_DCACHE_READ_REFILL = 0x42,
176 ARMV7_PERFCTR_L1_DCACHE_WRITE_REFILL = 0x43,
177
178 ARMV7_PERFCTR_L1_DTLB_READ_REFILL = 0x4C,
179 ARMV7_PERFCTR_L1_DTLB_WRITE_REFILL = 0x4D,
180
181 ARMV7_PERFCTR_L2_DCACHE_READ_ACCESS = 0x50,
182 ARMV7_PERFCTR_L2_DCACHE_WRITE_ACCESS = 0x51,
183 ARMV7_PERFCTR_L2_DCACHE_READ_REFILL = 0x52,
184 ARMV7_PERFCTR_L2_DCACHE_WRITE_REFILL = 0x53,
185
186 ARMV7_PERFCTR_SPEC_PC_WRITE = 0x76,
187 };
188
189 /*
190 * Cortex-A8 HW events mapping
191 *
192 * The hardware events that we support. We do support cache operations but
193 * we have harvard caches and no way to combine instruction and data
194 * accesses/misses in hardware.
195 */
196 static const unsigned armv7_a8_perf_map[PERF_COUNT_HW_MAX] = {
197 [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES,
198 [PERF_COUNT_HW_INSTRUCTIONS] = ARMV7_PERFCTR_INSTR_EXECUTED,
199 [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED,
200 [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED,
201 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE,
202 [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
203 [PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_CLOCK_CYCLES,
204 };
205
206 static const unsigned armv7_a8_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
207 [PERF_COUNT_HW_CACHE_OP_MAX]
208 [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
209 [C(L1D)] = {
210 /*
211 * The performance counters don't differentiate between read
212 * and write accesses/misses so this isn't strictly correct,
213 * but it's the best we can do. Writes and reads get
214 * combined.
215 */
216 [C(OP_READ)] = {
217 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS,
218 [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL,
219 },
220 [C(OP_WRITE)] = {
221 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS,
222 [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL,
223 },
224 [C(OP_PREFETCH)] = {
225 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
226 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
227 },
228 },
229 [C(L1I)] = {
230 [C(OP_READ)] = {
231 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_INST,
232 [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_INST_MISS,
233 },
234 [C(OP_WRITE)] = {
235 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_INST,
236 [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_INST_MISS,
237 },
238 [C(OP_PREFETCH)] = {
239 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
240 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
241 },
242 },
243 [C(LL)] = {
244 [C(OP_READ)] = {
245 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L2_ACCESS,
246 [C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACH_MISS,
247 },
248 [C(OP_WRITE)] = {
249 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L2_ACCESS,
250 [C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACH_MISS,
251 },
252 [C(OP_PREFETCH)] = {
253 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
254 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
255 },
256 },
257 [C(DTLB)] = {
258 [C(OP_READ)] = {
259 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
260 [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
261 },
262 [C(OP_WRITE)] = {
263 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
264 [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
265 },
266 [C(OP_PREFETCH)] = {
267 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
268 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
269 },
270 },
271 [C(ITLB)] = {
272 [C(OP_READ)] = {
273 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
274 [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
275 },
276 [C(OP_WRITE)] = {
277 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
278 [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
279 },
280 [C(OP_PREFETCH)] = {
281 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
282 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
283 },
284 },
285 [C(BPU)] = {
286 [C(OP_READ)] = {
287 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE,
288 [C(RESULT_MISS)]
289 = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
290 },
291 [C(OP_WRITE)] = {
292 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE,
293 [C(RESULT_MISS)]
294 = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
295 },
296 [C(OP_PREFETCH)] = {
297 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
298 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
299 },
300 },
301 [C(NODE)] = {
302 [C(OP_READ)] = {
303 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
304 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
305 },
306 [C(OP_WRITE)] = {
307 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
308 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
309 },
310 [C(OP_PREFETCH)] = {
311 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
312 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
313 },
314 },
315 };
316
317 /*
318 * Cortex-A9 HW events mapping
319 */
320 static const unsigned armv7_a9_perf_map[PERF_COUNT_HW_MAX] = {
321 [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES,
322 [PERF_COUNT_HW_INSTRUCTIONS] =
323 ARMV7_PERFCTR_INST_OUT_OF_RENAME_STAGE,
324 [PERF_COUNT_HW_CACHE_REFERENCES] = ARMV7_PERFCTR_COHERENT_LINE_HIT,
325 [PERF_COUNT_HW_CACHE_MISSES] = ARMV7_PERFCTR_COHERENT_LINE_MISS,
326 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE,
327 [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
328 [PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_CLOCK_CYCLES,
329 };
330
331 static const unsigned armv7_a9_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
332 [PERF_COUNT_HW_CACHE_OP_MAX]
333 [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
334 [C(L1D)] = {
335 /*
336 * The performance counters don't differentiate between read
337 * and write accesses/misses so this isn't strictly correct,
338 * but it's the best we can do. Writes and reads get
339 * combined.
340 */
341 [C(OP_READ)] = {
342 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS,
343 [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL,
344 },
345 [C(OP_WRITE)] = {
346 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS,
347 [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL,
348 },
349 [C(OP_PREFETCH)] = {
350 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
351 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
352 },
353 },
354 [C(L1I)] = {
355 [C(OP_READ)] = {
356 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
357 [C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS,
358 },
359 [C(OP_WRITE)] = {
360 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
361 [C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS,
362 },
363 [C(OP_PREFETCH)] = {
364 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
365 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
366 },
367 },
368 [C(LL)] = {
369 [C(OP_READ)] = {
370 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
371 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
372 },
373 [C(OP_WRITE)] = {
374 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
375 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
376 },
377 [C(OP_PREFETCH)] = {
378 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
379 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
380 },
381 },
382 [C(DTLB)] = {
383 [C(OP_READ)] = {
384 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
385 [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
386 },
387 [C(OP_WRITE)] = {
388 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
389 [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
390 },
391 [C(OP_PREFETCH)] = {
392 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
393 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
394 },
395 },
396 [C(ITLB)] = {
397 [C(OP_READ)] = {
398 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
399 [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
400 },
401 [C(OP_WRITE)] = {
402 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
403 [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
404 },
405 [C(OP_PREFETCH)] = {
406 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
407 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
408 },
409 },
410 [C(BPU)] = {
411 [C(OP_READ)] = {
412 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE,
413 [C(RESULT_MISS)]
414 = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
415 },
416 [C(OP_WRITE)] = {
417 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE,
418 [C(RESULT_MISS)]
419 = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
420 },
421 [C(OP_PREFETCH)] = {
422 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
423 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
424 },
425 },
426 [C(NODE)] = {
427 [C(OP_READ)] = {
428 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
429 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
430 },
431 [C(OP_WRITE)] = {
432 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
433 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
434 },
435 [C(OP_PREFETCH)] = {
436 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
437 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
438 },
439 },
440 };
441
442 /*
443 * Cortex-A5 HW events mapping
444 */
445 static const unsigned armv7_a5_perf_map[PERF_COUNT_HW_MAX] = {
446 [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES,
447 [PERF_COUNT_HW_INSTRUCTIONS] = ARMV7_PERFCTR_INSTR_EXECUTED,
448 [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED,
449 [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED,
450 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE,
451 [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
452 [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED,
453 };
454
455 static const unsigned armv7_a5_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
456 [PERF_COUNT_HW_CACHE_OP_MAX]
457 [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
458 [C(L1D)] = {
459 [C(OP_READ)] = {
460 [C(RESULT_ACCESS)]
461 = ARMV7_PERFCTR_DCACHE_ACCESS,
462 [C(RESULT_MISS)]
463 = ARMV7_PERFCTR_DCACHE_REFILL,
464 },
465 [C(OP_WRITE)] = {
466 [C(RESULT_ACCESS)]
467 = ARMV7_PERFCTR_DCACHE_ACCESS,
468 [C(RESULT_MISS)]
469 = ARMV7_PERFCTR_DCACHE_REFILL,
470 },
471 [C(OP_PREFETCH)] = {
472 [C(RESULT_ACCESS)]
473 = ARMV7_PERFCTR_PREFETCH_LINEFILL,
474 [C(RESULT_MISS)]
475 = ARMV7_PERFCTR_PREFETCH_LINEFILL_DROP,
476 },
477 },
478 [C(L1I)] = {
479 [C(OP_READ)] = {
480 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_ICACHE_ACCESS,
481 [C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS,
482 },
483 [C(OP_WRITE)] = {
484 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_ICACHE_ACCESS,
485 [C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS,
486 },
487 /*
488 * The prefetch counters don't differentiate between the I
489 * side and the D side.
490 */
491 [C(OP_PREFETCH)] = {
492 [C(RESULT_ACCESS)]
493 = ARMV7_PERFCTR_PREFETCH_LINEFILL,
494 [C(RESULT_MISS)]
495 = ARMV7_PERFCTR_PREFETCH_LINEFILL_DROP,
496 },
497 },
498 [C(LL)] = {
499 [C(OP_READ)] = {
500 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
501 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
502 },
503 [C(OP_WRITE)] = {
504 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
505 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
506 },
507 [C(OP_PREFETCH)] = {
508 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
509 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
510 },
511 },
512 [C(DTLB)] = {
513 [C(OP_READ)] = {
514 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
515 [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
516 },
517 [C(OP_WRITE)] = {
518 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
519 [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
520 },
521 [C(OP_PREFETCH)] = {
522 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
523 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
524 },
525 },
526 [C(ITLB)] = {
527 [C(OP_READ)] = {
528 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
529 [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
530 },
531 [C(OP_WRITE)] = {
532 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
533 [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
534 },
535 [C(OP_PREFETCH)] = {
536 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
537 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
538 },
539 },
540 [C(BPU)] = {
541 [C(OP_READ)] = {
542 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED,
543 [C(RESULT_MISS)]
544 = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
545 },
546 [C(OP_WRITE)] = {
547 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED,
548 [C(RESULT_MISS)]
549 = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
550 },
551 [C(OP_PREFETCH)] = {
552 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
553 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
554 },
555 },
556 };
557
558 /*
559 * Cortex-A15 HW events mapping
560 */
561 static const unsigned armv7_a15_perf_map[PERF_COUNT_HW_MAX] = {
562 [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES,
563 [PERF_COUNT_HW_INSTRUCTIONS] = ARMV7_PERFCTR_INSTR_EXECUTED,
564 [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED,
565 [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED,
566 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_SPEC_PC_WRITE,
567 [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
568 [PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_BUS_CYCLES,
569 };
570
571 static const unsigned armv7_a15_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
572 [PERF_COUNT_HW_CACHE_OP_MAX]
573 [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
574 [C(L1D)] = {
575 [C(OP_READ)] = {
576 [C(RESULT_ACCESS)]
577 = ARMV7_PERFCTR_L1_DCACHE_READ_ACCESS,
578 [C(RESULT_MISS)]
579 = ARMV7_PERFCTR_L1_DCACHE_READ_REFILL,
580 },
581 [C(OP_WRITE)] = {
582 [C(RESULT_ACCESS)]
583 = ARMV7_PERFCTR_L1_DCACHE_WRITE_ACCESS,
584 [C(RESULT_MISS)]
585 = ARMV7_PERFCTR_L1_DCACHE_WRITE_REFILL,
586 },
587 [C(OP_PREFETCH)] = {
588 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
589 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
590 },
591 },
592 [C(L1I)] = {
593 /*
594 * Not all performance counters differentiate between read
595 * and write accesses/misses so we're not always strictly
596 * correct, but it's the best we can do. Writes and reads get
597 * combined in these cases.
598 */
599 [C(OP_READ)] = {
600 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_ICACHE_ACCESS,
601 [C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS,
602 },
603 [C(OP_WRITE)] = {
604 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_ICACHE_ACCESS,
605 [C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS,
606 },
607 [C(OP_PREFETCH)] = {
608 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
609 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
610 },
611 },
612 [C(LL)] = {
613 [C(OP_READ)] = {
614 [C(RESULT_ACCESS)]
615 = ARMV7_PERFCTR_L2_DCACHE_READ_ACCESS,
616 [C(RESULT_MISS)]
617 = ARMV7_PERFCTR_L2_DCACHE_READ_REFILL,
618 },
619 [C(OP_WRITE)] = {
620 [C(RESULT_ACCESS)]
621 = ARMV7_PERFCTR_L2_DCACHE_WRITE_ACCESS,
622 [C(RESULT_MISS)]
623 = ARMV7_PERFCTR_L2_DCACHE_WRITE_REFILL,
624 },
625 [C(OP_PREFETCH)] = {
626 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
627 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
628 },
629 },
630 [C(DTLB)] = {
631 [C(OP_READ)] = {
632 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
633 [C(RESULT_MISS)]
634 = ARMV7_PERFCTR_L1_DTLB_READ_REFILL,
635 },
636 [C(OP_WRITE)] = {
637 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
638 [C(RESULT_MISS)]
639 = ARMV7_PERFCTR_L1_DTLB_WRITE_REFILL,
640 },
641 [C(OP_PREFETCH)] = {
642 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
643 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
644 },
645 },
646 [C(ITLB)] = {
647 [C(OP_READ)] = {
648 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
649 [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
650 },
651 [C(OP_WRITE)] = {
652 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
653 [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
654 },
655 [C(OP_PREFETCH)] = {
656 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
657 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
658 },
659 },
660 [C(BPU)] = {
661 [C(OP_READ)] = {
662 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED,
663 [C(RESULT_MISS)]
664 = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
665 },
666 [C(OP_WRITE)] = {
667 [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED,
668 [C(RESULT_MISS)]
669 = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
670 },
671 [C(OP_PREFETCH)] = {
672 [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
673 [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
674 },
675 },
676 };
677
678 /*
679 * Perf Events counters
680 */
681 enum armv7_counters {
682 ARMV7_CYCLE_COUNTER = 1, /* Cycle counter */
683 ARMV7_COUNTER0 = 2, /* First event counter */
684 };
685
686 /*
687 * The cycle counter is ARMV7_CYCLE_COUNTER.
688 * The first event counter is ARMV7_COUNTER0.
689 * The last event counter is (ARMV7_COUNTER0 + armpmu->num_events - 1).
690 */
691 #define ARMV7_COUNTER_LAST (ARMV7_COUNTER0 + armpmu->num_events - 1)
692
693 /*
694 * ARMv7 low level PMNC access
695 */
696
697 /*
698 * Per-CPU PMNC: config reg
699 */
700 #define ARMV7_PMNC_E (1 << 0) /* Enable all counters */
701 #define ARMV7_PMNC_P (1 << 1) /* Reset all counters */
702 #define ARMV7_PMNC_C (1 << 2) /* Cycle counter reset */
703 #define ARMV7_PMNC_D (1 << 3) /* CCNT counts every 64th cpu cycle */
704 #define ARMV7_PMNC_X (1 << 4) /* Export to ETM */
705 #define ARMV7_PMNC_DP (1 << 5) /* Disable CCNT if non-invasive debug*/
706 #define ARMV7_PMNC_N_SHIFT 11 /* Number of counters supported */
707 #define ARMV7_PMNC_N_MASK 0x1f
708 #define ARMV7_PMNC_MASK 0x3f /* Mask for writable bits */
709
710 /*
711 * Available counters
712 */
713 #define ARMV7_CNT0 0 /* First event counter */
714 #define ARMV7_CCNT 31 /* Cycle counter */
715
716 /* Perf Event to low level counters mapping */
717 #define ARMV7_EVENT_CNT_TO_CNTx (ARMV7_COUNTER0 - ARMV7_CNT0)
718
719 /*
720 * CNTENS: counters enable reg
721 */
722 #define ARMV7_CNTENS_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
723 #define ARMV7_CNTENS_C (1 << ARMV7_CCNT)
724
725 /*
726 * CNTENC: counters disable reg
727 */
728 #define ARMV7_CNTENC_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
729 #define ARMV7_CNTENC_C (1 << ARMV7_CCNT)
730
731 /*
732 * INTENS: counters overflow interrupt enable reg
733 */
734 #define ARMV7_INTENS_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
735 #define ARMV7_INTENS_C (1 << ARMV7_CCNT)
736
737 /*
738 * INTENC: counters overflow interrupt disable reg
739 */
740 #define ARMV7_INTENC_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
741 #define ARMV7_INTENC_C (1 << ARMV7_CCNT)
742
743 /*
744 * EVTSEL: Event selection reg
745 */
746 #define ARMV7_EVTSEL_MASK 0xff /* Mask for writable bits */
747
748 /*
749 * SELECT: Counter selection reg
750 */
751 #define ARMV7_SELECT_MASK 0x1f /* Mask for writable bits */
752
753 /*
754 * FLAG: counters overflow flag status reg
755 */
756 #define ARMV7_FLAG_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
757 #define ARMV7_FLAG_C (1 << ARMV7_CCNT)
758 #define ARMV7_FLAG_MASK 0xffffffff /* Mask for writable bits */
759 #define ARMV7_OVERFLOWED_MASK ARMV7_FLAG_MASK
760
761 static inline unsigned long armv7_pmnc_read(void)
762 {
763 u32 val;
764 asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r"(val));
765 return val;
766 }
767
768 static inline void armv7_pmnc_write(unsigned long val)
769 {
770 val &= ARMV7_PMNC_MASK;
771 isb();
772 asm volatile("mcr p15, 0, %0, c9, c12, 0" : : "r"(val));
773 }
774
775 static inline int armv7_pmnc_has_overflowed(unsigned long pmnc)
776 {
777 return pmnc & ARMV7_OVERFLOWED_MASK;
778 }
779
780 static inline int armv7_pmnc_counter_has_overflowed(unsigned long pmnc,
781 enum armv7_counters counter)
782 {
783 int ret = 0;
784
785 if (counter == ARMV7_CYCLE_COUNTER)
786 ret = pmnc & ARMV7_FLAG_C;
787 else if ((counter >= ARMV7_COUNTER0) && (counter <= ARMV7_COUNTER_LAST))
788 ret = pmnc & ARMV7_FLAG_P(counter);
789 else
790 pr_err("CPU%u checking wrong counter %d overflow status\n",
791 smp_processor_id(), counter);
792
793 return ret;
794 }
795
796 static inline int armv7_pmnc_select_counter(unsigned int idx)
797 {
798 u32 val;
799
800 if ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST)) {
801 pr_err("CPU%u selecting wrong PMNC counter"
802 " %d\n", smp_processor_id(), idx);
803 return -1;
804 }
805
806 val = (idx - ARMV7_EVENT_CNT_TO_CNTx) & ARMV7_SELECT_MASK;
807 asm volatile("mcr p15, 0, %0, c9, c12, 5" : : "r" (val));
808 isb();
809
810 return idx;
811 }
812
813 static inline u32 armv7pmu_read_counter(int idx)
814 {
815 unsigned long value = 0;
816
817 if (idx == ARMV7_CYCLE_COUNTER)
818 asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (value));
819 else if ((idx >= ARMV7_COUNTER0) && (idx <= ARMV7_COUNTER_LAST)) {
820 if (armv7_pmnc_select_counter(idx) == idx)
821 asm volatile("mrc p15, 0, %0, c9, c13, 2"
822 : "=r" (value));
823 } else
824 pr_err("CPU%u reading wrong counter %d\n",
825 smp_processor_id(), idx);
826
827 return value;
828 }
829
830 static inline void armv7pmu_write_counter(int idx, u32 value)
831 {
832 if (idx == ARMV7_CYCLE_COUNTER)
833 asm volatile("mcr p15, 0, %0, c9, c13, 0" : : "r" (value));
834 else if ((idx >= ARMV7_COUNTER0) && (idx <= ARMV7_COUNTER_LAST)) {
835 if (armv7_pmnc_select_counter(idx) == idx)
836 asm volatile("mcr p15, 0, %0, c9, c13, 2"
837 : : "r" (value));
838 } else
839 pr_err("CPU%u writing wrong counter %d\n",
840 smp_processor_id(), idx);
841 }
842
843 static inline void armv7_pmnc_write_evtsel(unsigned int idx, u32 val)
844 {
845 if (armv7_pmnc_select_counter(idx) == idx) {
846 val &= ARMV7_EVTSEL_MASK;
847 asm volatile("mcr p15, 0, %0, c9, c13, 1" : : "r" (val));
848 }
849 }
850
851 static inline u32 armv7_pmnc_enable_counter(unsigned int idx)
852 {
853 u32 val;
854
855 if ((idx != ARMV7_CYCLE_COUNTER) &&
856 ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) {
857 pr_err("CPU%u enabling wrong PMNC counter"
858 " %d\n", smp_processor_id(), idx);
859 return -1;
860 }
861
862 if (idx == ARMV7_CYCLE_COUNTER)
863 val = ARMV7_CNTENS_C;
864 else
865 val = ARMV7_CNTENS_P(idx);
866
867 asm volatile("mcr p15, 0, %0, c9, c12, 1" : : "r" (val));
868
869 return idx;
870 }
871
872 static inline u32 armv7_pmnc_disable_counter(unsigned int idx)
873 {
874 u32 val;
875
876
877 if ((idx != ARMV7_CYCLE_COUNTER) &&
878 ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) {
879 pr_err("CPU%u disabling wrong PMNC counter"
880 " %d\n", smp_processor_id(), idx);
881 return -1;
882 }
883
884 if (idx == ARMV7_CYCLE_COUNTER)
885 val = ARMV7_CNTENC_C;
886 else
887 val = ARMV7_CNTENC_P(idx);
888
889 asm volatile("mcr p15, 0, %0, c9, c12, 2" : : "r" (val));
890
891 return idx;
892 }
893
894 static inline u32 armv7_pmnc_enable_intens(unsigned int idx)
895 {
896 u32 val;
897
898 if ((idx != ARMV7_CYCLE_COUNTER) &&
899 ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) {
900 pr_err("CPU%u enabling wrong PMNC counter"
901 " interrupt enable %d\n", smp_processor_id(), idx);
902 return -1;
903 }
904
905 if (idx == ARMV7_CYCLE_COUNTER)
906 val = ARMV7_INTENS_C;
907 else
908 val = ARMV7_INTENS_P(idx);
909
910 asm volatile("mcr p15, 0, %0, c9, c14, 1" : : "r" (val));
911
912 return idx;
913 }
914
915 static inline u32 armv7_pmnc_disable_intens(unsigned int idx)
916 {
917 u32 val;
918
919 if ((idx != ARMV7_CYCLE_COUNTER) &&
920 ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) {
921 pr_err("CPU%u disabling wrong PMNC counter"
922 " interrupt enable %d\n", smp_processor_id(), idx);
923 return -1;
924 }
925
926 if (idx == ARMV7_CYCLE_COUNTER)
927 val = ARMV7_INTENC_C;
928 else
929 val = ARMV7_INTENC_P(idx);
930
931 asm volatile("mcr p15, 0, %0, c9, c14, 2" : : "r" (val));
932
933 return idx;
934 }
935
936 static inline u32 armv7_pmnc_getreset_flags(void)
937 {
938 u32 val;
939
940 /* Read */
941 asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val));
942
943 /* Write to clear flags */
944 val &= ARMV7_FLAG_MASK;
945 asm volatile("mcr p15, 0, %0, c9, c12, 3" : : "r" (val));
946
947 return val;
948 }
949
950 #ifdef DEBUG
951 static void armv7_pmnc_dump_regs(void)
952 {
953 u32 val;
954 unsigned int cnt;
955
956 printk(KERN_INFO "PMNC registers dump:\n");
957
958 asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r" (val));
959 printk(KERN_INFO "PMNC =0x%08x\n", val);
960
961 asm volatile("mrc p15, 0, %0, c9, c12, 1" : "=r" (val));
962 printk(KERN_INFO "CNTENS=0x%08x\n", val);
963
964 asm volatile("mrc p15, 0, %0, c9, c14, 1" : "=r" (val));
965 printk(KERN_INFO "INTENS=0x%08x\n", val);
966
967 asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val));
968 printk(KERN_INFO "FLAGS =0x%08x\n", val);
969
970 asm volatile("mrc p15, 0, %0, c9, c12, 5" : "=r" (val));
971 printk(KERN_INFO "SELECT=0x%08x\n", val);
972
973 asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (val));
974 printk(KERN_INFO "CCNT =0x%08x\n", val);
975
976 for (cnt = ARMV7_COUNTER0; cnt < ARMV7_COUNTER_LAST; cnt++) {
977 armv7_pmnc_select_counter(cnt);
978 asm volatile("mrc p15, 0, %0, c9, c13, 2" : "=r" (val));
979 printk(KERN_INFO "CNT[%d] count =0x%08x\n",
980 cnt-ARMV7_EVENT_CNT_TO_CNTx, val);
981 asm volatile("mrc p15, 0, %0, c9, c13, 1" : "=r" (val));
982 printk(KERN_INFO "CNT[%d] evtsel=0x%08x\n",
983 cnt-ARMV7_EVENT_CNT_TO_CNTx, val);
984 }
985 }
986 #endif
987
988 static void armv7pmu_enable_event(struct hw_perf_event *hwc, int idx)
989 {
990 unsigned long flags;
991
992 /*
993 * Enable counter and interrupt, and set the counter to count
994 * the event that we're interested in.
995 */
996 raw_spin_lock_irqsave(&pmu_lock, flags);
997
998 /*
999 * Disable counter
1000 */
1001 armv7_pmnc_disable_counter(idx);
1002
1003 /*
1004 * Set event (if destined for PMNx counters)
1005 * We don't need to set the event if it's a cycle count
1006 */
1007 if (idx != ARMV7_CYCLE_COUNTER)
1008 armv7_pmnc_write_evtsel(idx, hwc->config_base);
1009
1010 /*
1011 * Enable interrupt for this counter
1012 */
1013 armv7_pmnc_enable_intens(idx);
1014
1015 /*
1016 * Enable counter
1017 */
1018 armv7_pmnc_enable_counter(idx);
1019
1020 raw_spin_unlock_irqrestore(&pmu_lock, flags);
1021 }
1022
1023 static void armv7pmu_disable_event(struct hw_perf_event *hwc, int idx)
1024 {
1025 unsigned long flags;
1026
1027 /*
1028 * Disable counter and interrupt
1029 */
1030 raw_spin_lock_irqsave(&pmu_lock, flags);
1031
1032 /*
1033 * Disable counter
1034 */
1035 armv7_pmnc_disable_counter(idx);
1036
1037 /*
1038 * Disable interrupt for this counter
1039 */
1040 armv7_pmnc_disable_intens(idx);
1041
1042 raw_spin_unlock_irqrestore(&pmu_lock, flags);
1043 }
1044
1045 static irqreturn_t armv7pmu_handle_irq(int irq_num, void *dev)
1046 {
1047 unsigned long pmnc;
1048 struct perf_sample_data data;
1049 struct cpu_hw_events *cpuc;
1050 struct pt_regs *regs;
1051 int idx;
1052
1053 /*
1054 * Get and reset the IRQ flags
1055 */
1056 pmnc = armv7_pmnc_getreset_flags();
1057
1058 /*
1059 * Did an overflow occur?
1060 */
1061 if (!armv7_pmnc_has_overflowed(pmnc))
1062 return IRQ_NONE;
1063
1064 /*
1065 * Handle the counter(s) overflow(s)
1066 */
1067 regs = get_irq_regs();
1068
1069 perf_sample_data_init(&data, 0);
1070
1071 cpuc = &__get_cpu_var(cpu_hw_events);
1072 for (idx = 0; idx <= armpmu->num_events; ++idx) {
1073 struct perf_event *event = cpuc->events[idx];
1074 struct hw_perf_event *hwc;
1075
1076 if (!test_bit(idx, cpuc->active_mask))
1077 continue;
1078
1079 /*
1080 * We have a single interrupt for all counters. Check that
1081 * each counter has overflowed before we process it.
1082 */
1083 if (!armv7_pmnc_counter_has_overflowed(pmnc, idx))
1084 continue;
1085
1086 hwc = &event->hw;
1087 armpmu_event_update(event, hwc, idx, 1);
1088 data.period = event->hw.last_period;
1089 if (!armpmu_event_set_period(event, hwc, idx))
1090 continue;
1091
1092 if (perf_event_overflow(event, &data, regs))
1093 armpmu->disable(hwc, idx);
1094 }
1095
1096 /*
1097 * Handle the pending perf events.
1098 *
1099 * Note: this call *must* be run with interrupts disabled. For
1100 * platforms that can have the PMU interrupts raised as an NMI, this
1101 * will not work.
1102 */
1103 irq_work_run();
1104
1105 return IRQ_HANDLED;
1106 }
1107
1108 static void armv7pmu_start(void)
1109 {
1110 unsigned long flags;
1111
1112 raw_spin_lock_irqsave(&pmu_lock, flags);
1113 /* Enable all counters */
1114 armv7_pmnc_write(armv7_pmnc_read() | ARMV7_PMNC_E);
1115 raw_spin_unlock_irqrestore(&pmu_lock, flags);
1116 }
1117
1118 static void armv7pmu_stop(void)
1119 {
1120 unsigned long flags;
1121
1122 raw_spin_lock_irqsave(&pmu_lock, flags);
1123 /* Disable all counters */
1124 armv7_pmnc_write(armv7_pmnc_read() & ~ARMV7_PMNC_E);
1125 raw_spin_unlock_irqrestore(&pmu_lock, flags);
1126 }
1127
1128 static int armv7pmu_get_event_idx(struct cpu_hw_events *cpuc,
1129 struct hw_perf_event *event)
1130 {
1131 int idx;
1132
1133 /* Always place a cycle counter into the cycle counter. */
1134 if (event->config_base == ARMV7_PERFCTR_CPU_CYCLES) {
1135 if (test_and_set_bit(ARMV7_CYCLE_COUNTER, cpuc->used_mask))
1136 return -EAGAIN;
1137
1138 return ARMV7_CYCLE_COUNTER;
1139 } else {
1140 /*
1141 * For anything other than a cycle counter, try and use
1142 * the events counters
1143 */
1144 for (idx = ARMV7_COUNTER0; idx <= armpmu->num_events; ++idx) {
1145 if (!test_and_set_bit(idx, cpuc->used_mask))
1146 return idx;
1147 }
1148
1149 /* The counters are all in use. */
1150 return -EAGAIN;
1151 }
1152 }
1153
1154 static void armv7pmu_reset(void *info)
1155 {
1156 u32 idx, nb_cnt = armpmu->num_events;
1157
1158 /* The counter and interrupt enable registers are unknown at reset. */
1159 for (idx = 1; idx < nb_cnt; ++idx)
1160 armv7pmu_disable_event(NULL, idx);
1161
1162 /* Initialize & Reset PMNC: C and P bits */
1163 armv7_pmnc_write(ARMV7_PMNC_P | ARMV7_PMNC_C);
1164 }
1165
1166 static struct arm_pmu armv7pmu = {
1167 .handle_irq = armv7pmu_handle_irq,
1168 .enable = armv7pmu_enable_event,
1169 .disable = armv7pmu_disable_event,
1170 .read_counter = armv7pmu_read_counter,
1171 .write_counter = armv7pmu_write_counter,
1172 .get_event_idx = armv7pmu_get_event_idx,
1173 .start = armv7pmu_start,
1174 .stop = armv7pmu_stop,
1175 .reset = armv7pmu_reset,
1176 .raw_event_mask = 0xFF,
1177 .max_period = (1LLU << 32) - 1,
1178 };
1179
1180 static u32 __init armv7_read_num_pmnc_events(void)
1181 {
1182 u32 nb_cnt;
1183
1184 /* Read the nb of CNTx counters supported from PMNC */
1185 nb_cnt = (armv7_pmnc_read() >> ARMV7_PMNC_N_SHIFT) & ARMV7_PMNC_N_MASK;
1186
1187 /* Add the CPU cycles counter and return */
1188 return nb_cnt + 1;
1189 }
1190
1191 static const struct arm_pmu *__init armv7_a8_pmu_init(void)
1192 {
1193 armv7pmu.id = ARM_PERF_PMU_ID_CA8;
1194 armv7pmu.name = "ARMv7 Cortex-A8";
1195 armv7pmu.cache_map = &armv7_a8_perf_cache_map;
1196 armv7pmu.event_map = &armv7_a8_perf_map;
1197 armv7pmu.num_events = armv7_read_num_pmnc_events();
1198 return &armv7pmu;
1199 }
1200
1201 static const struct arm_pmu *__init armv7_a9_pmu_init(void)
1202 {
1203 armv7pmu.id = ARM_PERF_PMU_ID_CA9;
1204 armv7pmu.name = "ARMv7 Cortex-A9";
1205 armv7pmu.cache_map = &armv7_a9_perf_cache_map;
1206 armv7pmu.event_map = &armv7_a9_perf_map;
1207 armv7pmu.num_events = armv7_read_num_pmnc_events();
1208 return &armv7pmu;
1209 }
1210
1211 static const struct arm_pmu *__init armv7_a5_pmu_init(void)
1212 {
1213 armv7pmu.id = ARM_PERF_PMU_ID_CA5;
1214 armv7pmu.name = "ARMv7 Cortex-A5";
1215 armv7pmu.cache_map = &armv7_a5_perf_cache_map;
1216 armv7pmu.event_map = &armv7_a5_perf_map;
1217 armv7pmu.num_events = armv7_read_num_pmnc_events();
1218 return &armv7pmu;
1219 }
1220
1221 static const struct arm_pmu *__init armv7_a15_pmu_init(void)
1222 {
1223 armv7pmu.id = ARM_PERF_PMU_ID_CA15;
1224 armv7pmu.name = "ARMv7 Cortex-A15";
1225 armv7pmu.cache_map = &armv7_a15_perf_cache_map;
1226 armv7pmu.event_map = &armv7_a15_perf_map;
1227 armv7pmu.num_events = armv7_read_num_pmnc_events();
1228 return &armv7pmu;
1229 }
1230 #else
1231 static const struct arm_pmu *__init armv7_a8_pmu_init(void)
1232 {
1233 return NULL;
1234 }
1235
1236 static const struct arm_pmu *__init armv7_a9_pmu_init(void)
1237 {
1238 return NULL;
1239 }
1240
1241 static const struct arm_pmu *__init armv7_a5_pmu_init(void)
1242 {
1243 return NULL;
1244 }
1245
1246 static const struct arm_pmu *__init armv7_a15_pmu_init(void)
1247 {
1248 return NULL;
1249 }
1250 #endif /* CONFIG_CPU_V7 */
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