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RT-AC56 3.0.0.4.374.37 core
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / arch / powerpc / kernel / power4-pmu.c
blob2a361cdda635881ba4e96bf33f0a3dd6b8c273ea
1 /*
2 * Performance counter support for POWER4 (GP) and POWER4+ (GQ) processors.
3 *
4 * Copyright 2009 Paul Mackerras, IBM Corporation.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11 #include <linux/kernel.h>
12 #include <linux/perf_event.h>
13 #include <linux/string.h>
14 #include <asm/reg.h>
15 #include <asm/cputable.h>
16
17 /*
18 * Bits in event code for POWER4
19 */
20 #define PM_PMC_SH 12 /* PMC number (1-based) for direct events */
21 #define PM_PMC_MSK 0xf
22 #define PM_UNIT_SH 8 /* TTMMUX number and setting - unit select */
23 #define PM_UNIT_MSK 0xf
24 #define PM_LOWER_SH 6
25 #define PM_LOWER_MSK 1
26 #define PM_LOWER_MSKS 0x40
27 #define PM_BYTE_SH 4 /* Byte number of event bus to use */
28 #define PM_BYTE_MSK 3
29 #define PM_PMCSEL_MSK 7
30
31 /*
32 * Unit code values
33 */
34 #define PM_FPU 1
35 #define PM_ISU1 2
36 #define PM_IFU 3
37 #define PM_IDU0 4
38 #define PM_ISU1_ALT 6
39 #define PM_ISU2 7
40 #define PM_IFU_ALT 8
41 #define PM_LSU0 9
42 #define PM_LSU1 0xc
43 #define PM_GPS 0xf
44
45 /*
46 * Bits in MMCR0 for POWER4
47 */
48 #define MMCR0_PMC1SEL_SH 8
49 #define MMCR0_PMC2SEL_SH 1
50 #define MMCR_PMCSEL_MSK 0x1f
51
52 /*
53 * Bits in MMCR1 for POWER4
54 */
55 #define MMCR1_TTM0SEL_SH 62
56 #define MMCR1_TTC0SEL_SH 61
57 #define MMCR1_TTM1SEL_SH 59
58 #define MMCR1_TTC1SEL_SH 58
59 #define MMCR1_TTM2SEL_SH 56
60 #define MMCR1_TTC2SEL_SH 55
61 #define MMCR1_TTM3SEL_SH 53
62 #define MMCR1_TTC3SEL_SH 52
63 #define MMCR1_TTMSEL_MSK 3
64 #define MMCR1_TD_CP_DBG0SEL_SH 50
65 #define MMCR1_TD_CP_DBG1SEL_SH 48
66 #define MMCR1_TD_CP_DBG2SEL_SH 46
67 #define MMCR1_TD_CP_DBG3SEL_SH 44
68 #define MMCR1_DEBUG0SEL_SH 43
69 #define MMCR1_DEBUG1SEL_SH 42
70 #define MMCR1_DEBUG2SEL_SH 41
71 #define MMCR1_DEBUG3SEL_SH 40
72 #define MMCR1_PMC1_ADDER_SEL_SH 39
73 #define MMCR1_PMC2_ADDER_SEL_SH 38
74 #define MMCR1_PMC6_ADDER_SEL_SH 37
75 #define MMCR1_PMC5_ADDER_SEL_SH 36
76 #define MMCR1_PMC8_ADDER_SEL_SH 35
77 #define MMCR1_PMC7_ADDER_SEL_SH 34
78 #define MMCR1_PMC3_ADDER_SEL_SH 33
79 #define MMCR1_PMC4_ADDER_SEL_SH 32
80 #define MMCR1_PMC3SEL_SH 27
81 #define MMCR1_PMC4SEL_SH 22
82 #define MMCR1_PMC5SEL_SH 17
83 #define MMCR1_PMC6SEL_SH 12
84 #define MMCR1_PMC7SEL_SH 7
85 #define MMCR1_PMC8SEL_SH 2 /* note bit 0 is in MMCRA for GP */
86
87 static short mmcr1_adder_bits[8] = {
88 MMCR1_PMC1_ADDER_SEL_SH,
89 MMCR1_PMC2_ADDER_SEL_SH,
90 MMCR1_PMC3_ADDER_SEL_SH,
91 MMCR1_PMC4_ADDER_SEL_SH,
92 MMCR1_PMC5_ADDER_SEL_SH,
93 MMCR1_PMC6_ADDER_SEL_SH,
94 MMCR1_PMC7_ADDER_SEL_SH,
95 MMCR1_PMC8_ADDER_SEL_SH
96 };
97
98 /*
99 * Bits in MMCRA
100 */
101 #define MMCRA_PMC8SEL0_SH 17 /* PMC8SEL bit 0 for GP */
102
103 /*
104 * Layout of constraint bits:
105 * 6666555555555544444444443333333333222222222211111111110000000000
106 * 3210987654321098765432109876543210987654321098765432109876543210
107 * |[ >[ >[ >|||[ >[ >< >< >< >< ><><><><><><><><>
108 * | UC1 UC2 UC3 ||| PS1 PS2 B0 B1 B2 B3 P1P2P3P4P5P6P7P8
109 * \SMPL ||\TTC3SEL
110 * |\TTC_IFU_SEL
111 * \TTM2SEL0
112 *
113 * SMPL - SAMPLE_ENABLE constraint
114 * 56: SAMPLE_ENABLE value 0x0100_0000_0000_0000
115 *
116 * UC1 - unit constraint 1: can't have all three of FPU/ISU1/IDU0|ISU2
117 * 55: UC1 error 0x0080_0000_0000_0000
118 * 54: FPU events needed 0x0040_0000_0000_0000
119 * 53: ISU1 events needed 0x0020_0000_0000_0000
120 * 52: IDU0|ISU2 events needed 0x0010_0000_0000_0000
121 *
122 * UC2 - unit constraint 2: can't have all three of FPU/IFU/LSU0
123 * 51: UC2 error 0x0008_0000_0000_0000
124 * 50: FPU events needed 0x0004_0000_0000_0000
125 * 49: IFU events needed 0x0002_0000_0000_0000
126 * 48: LSU0 events needed 0x0001_0000_0000_0000
127 *
128 * UC3 - unit constraint 3: can't have all four of LSU0/IFU/IDU0|ISU2/ISU1
129 * 47: UC3 error 0x8000_0000_0000
130 * 46: LSU0 events needed 0x4000_0000_0000
131 * 45: IFU events needed 0x2000_0000_0000
132 * 44: IDU0|ISU2 events needed 0x1000_0000_0000
133 * 43: ISU1 events needed 0x0800_0000_0000
134 *
135 * TTM2SEL0
136 * 42: 0 = IDU0 events needed
137 * 1 = ISU2 events needed 0x0400_0000_0000
138 *
139 * TTC_IFU_SEL
140 * 41: 0 = IFU.U events needed
141 * 1 = IFU.L events needed 0x0200_0000_0000
142 *
143 * TTC3SEL
144 * 40: 0 = LSU1.U events needed
145 * 1 = LSU1.L events needed 0x0100_0000_0000
146 *
147 * PS1
148 * 39: PS1 error 0x0080_0000_0000
149 * 36-38: count of events needing PMC1/2/5/6 0x0070_0000_0000
150 *
151 * PS2
152 * 35: PS2 error 0x0008_0000_0000
153 * 32-34: count of events needing PMC3/4/7/8 0x0007_0000_0000
154 *
155 * B0
156 * 28-31: Byte 0 event source 0xf000_0000
157 * 1 = FPU
158 * 2 = ISU1
159 * 3 = IFU
160 * 4 = IDU0
161 * 7 = ISU2
162 * 9 = LSU0
163 * c = LSU1
164 * f = GPS
165 *
166 * B1, B2, B3
167 * 24-27, 20-23, 16-19: Byte 1, 2, 3 event sources
168 *
169 * P8
170 * 15: P8 error 0x8000
171 * 14-15: Count of events needing PMC8
172 *
173 * P1..P7
174 * 0-13: Count of events needing PMC1..PMC7
175 *
176 * Note: this doesn't allow events using IFU.U to be combined with events
177 * using IFU.L, though that is feasible (using TTM0 and TTM2). However
178 * there are no listed events for IFU.L (they are debug events not
179 * verified for performance monitoring) so this shouldn't cause a
180 * problem.
181 */
182
183 static struct unitinfo {
184 unsigned long value, mask;
185 int unit;
186 int lowerbit;
187 } p4_unitinfo[16] = {
188 [PM_FPU] = { 0x44000000000000ul, 0x88000000000000ul, PM_FPU, 0 },
189 [PM_ISU1] = { 0x20080000000000ul, 0x88000000000000ul, PM_ISU1, 0 },
190 [PM_ISU1_ALT] =
191 { 0x20080000000000ul, 0x88000000000000ul, PM_ISU1, 0 },
192 [PM_IFU] = { 0x02200000000000ul, 0x08820000000000ul, PM_IFU, 41 },
193 [PM_IFU_ALT] =
194 { 0x02200000000000ul, 0x08820000000000ul, PM_IFU, 41 },
195 [PM_IDU0] = { 0x10100000000000ul, 0x80840000000000ul, PM_IDU0, 1 },
196 [PM_ISU2] = { 0x10140000000000ul, 0x80840000000000ul, PM_ISU2, 0 },
197 [PM_LSU0] = { 0x01400000000000ul, 0x08800000000000ul, PM_LSU0, 0 },
198 [PM_LSU1] = { 0x00000000000000ul, 0x00010000000000ul, PM_LSU1, 40 },
199 [PM_GPS] = { 0x00000000000000ul, 0x00000000000000ul, PM_GPS, 0 }
200 };
201
202 static unsigned char direct_marked_event[8] = {
203 (1<<2) | (1<<3), /* PMC1: PM_MRK_GRP_DISP, PM_MRK_ST_CMPL */
204 (1<<3) | (1<<5), /* PMC2: PM_THRESH_TIMEO, PM_MRK_BRU_FIN */
205 (1<<3), /* PMC3: PM_MRK_ST_CMPL_INT */
206 (1<<4) | (1<<5), /* PMC4: PM_MRK_GRP_CMPL, PM_MRK_CRU_FIN */
207 (1<<4) | (1<<5), /* PMC5: PM_MRK_GRP_TIMEO */
208 (1<<3) | (1<<4) | (1<<5),
209 /* PMC6: PM_MRK_ST_GPS, PM_MRK_FXU_FIN, PM_MRK_GRP_ISSUED */
210 (1<<4) | (1<<5), /* PMC7: PM_MRK_FPU_FIN, PM_MRK_INST_FIN */
211 (1<<4), /* PMC8: PM_MRK_LSU_FIN */
212 };
213
214 /*
215 * Returns 1 if event counts things relating to marked instructions
216 * and thus needs the MMCRA_SAMPLE_ENABLE bit set, or 0 if not.
217 */
218 static int p4_marked_instr_event(u64 event)
219 {
220 int pmc, psel, unit, byte, bit;
221 unsigned int mask;
222
223 pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
224 psel = event & PM_PMCSEL_MSK;
225 if (pmc) {
226 if (direct_marked_event[pmc - 1] & (1 << psel))
227 return 1;
228 if (psel == 0) /* add events */
229 bit = (pmc <= 4)? pmc - 1: 8 - pmc;
230 else if (psel == 6) /* decode events */
231 bit = 4;
232 else
233 return 0;
234 } else
235 bit = psel;
236
237 byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
238 unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
239 mask = 0;
240 switch (unit) {
241 case PM_LSU1:
242 if (event & PM_LOWER_MSKS)
243 mask = 1 << 28; /* byte 7 bit 4 */
244 else
245 mask = 6 << 24; /* byte 3 bits 1 and 2 */
246 break;
247 case PM_LSU0:
248 /* byte 3, bit 3; byte 2 bits 0,2,3,4,5; byte 1 */
249 mask = 0x083dff00;
250 }
251 return (mask >> (byte * 8 + bit)) & 1;
252 }
253
254 static int p4_get_constraint(u64 event, unsigned long *maskp,
255 unsigned long *valp)
256 {
257 int pmc, byte, unit, lower, sh;
258 unsigned long mask = 0, value = 0;
259 int grp = -1;
260
261 pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
262 if (pmc) {
263 if (pmc > 8)
264 return -1;
265 sh = (pmc - 1) * 2;
266 mask |= 2 << sh;
267 value |= 1 << sh;
268 grp = ((pmc - 1) >> 1) & 1;
269 }
270 unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
271 byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
272 if (unit) {
273 lower = (event >> PM_LOWER_SH) & PM_LOWER_MSK;
274
275 /*
276 * Bus events on bytes 0 and 2 can be counted
277 * on PMC1/2/5/6; bytes 1 and 3 on PMC3/4/7/8.
278 */
279 if (!pmc)
280 grp = byte & 1;
281
282 if (!p4_unitinfo[unit].unit)
283 return -1;
284 mask |= p4_unitinfo[unit].mask;
285 value |= p4_unitinfo[unit].value;
286 sh = p4_unitinfo[unit].lowerbit;
287 if (sh > 1)
288 value |= (unsigned long)lower << sh;
289 else if (lower != sh)
290 return -1;
291 unit = p4_unitinfo[unit].unit;
292
293 /* Set byte lane select field */
294 mask |= 0xfULL << (28 - 4 * byte);
295 value |= (unsigned long)unit << (28 - 4 * byte);
296 }
297 if (grp == 0) {
298 /* increment PMC1/2/5/6 field */
299 mask |= 0x8000000000ull;
300 value |= 0x1000000000ull;
301 } else {
302 /* increment PMC3/4/7/8 field */
303 mask |= 0x800000000ull;
304 value |= 0x100000000ull;
305 }
306
307 /* Marked instruction events need sample_enable set */
308 if (p4_marked_instr_event(event)) {
309 mask |= 1ull << 56;
310 value |= 1ull << 56;
311 }
312
313 /* PMCSEL=6 decode events on byte 2 need sample_enable clear */
314 if (pmc && (event & PM_PMCSEL_MSK) == 6 && byte == 2)
315 mask |= 1ull << 56;
316
317 *maskp = mask;
318 *valp = value;
319 return 0;
320 }
321
322 static unsigned int ppc_inst_cmpl[] = {
323 0x1001, 0x4001, 0x6001, 0x7001, 0x8001
324 };
325
326 static int p4_get_alternatives(u64 event, unsigned int flags, u64 alt[])
327 {
328 int i, j, na;
329
330 alt[0] = event;
331 na = 1;
332
333 /* 2 possibilities for PM_GRP_DISP_REJECT */
334 if (event == 0x8003 || event == 0x0224) {
335 alt[1] = event ^ (0x8003 ^ 0x0224);
336 return 2;
337 }
338
339 /* 2 possibilities for PM_ST_MISS_L1 */
340 if (event == 0x0c13 || event == 0x0c23) {
341 alt[1] = event ^ (0x0c13 ^ 0x0c23);
342 return 2;
343 }
344
345 /* several possibilities for PM_INST_CMPL */
346 for (i = 0; i < ARRAY_SIZE(ppc_inst_cmpl); ++i) {
347 if (event == ppc_inst_cmpl[i]) {
348 for (j = 0; j < ARRAY_SIZE(ppc_inst_cmpl); ++j)
349 if (j != i)
350 alt[na++] = ppc_inst_cmpl[j];
351 break;
352 }
353 }
354
355 return na;
356 }
357
358 static int p4_compute_mmcr(u64 event[], int n_ev,
359 unsigned int hwc[], unsigned long mmcr[])
360 {
361 unsigned long mmcr0 = 0, mmcr1 = 0, mmcra = 0;
362 unsigned int pmc, unit, byte, psel, lower;
363 unsigned int ttm, grp;
364 unsigned int pmc_inuse = 0;
365 unsigned int pmc_grp_use[2];
366 unsigned char busbyte[4];
367 unsigned char unituse[16];
368 unsigned int unitlower = 0;
369 int i;
370
371 if (n_ev > 8)
372 return -1;
373
374 /* First pass to count resource use */
375 pmc_grp_use[0] = pmc_grp_use[1] = 0;
376 memset(busbyte, 0, sizeof(busbyte));
377 memset(unituse, 0, sizeof(unituse));
378 for (i = 0; i < n_ev; ++i) {
379 pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
380 if (pmc) {
381 if (pmc_inuse & (1 << (pmc - 1)))
382 return -1;
383 pmc_inuse |= 1 << (pmc - 1);
384 /* count 1/2/5/6 vs 3/4/7/8 use */
385 ++pmc_grp_use[((pmc - 1) >> 1) & 1];
386 }
387 unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
388 byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
389 lower = (event[i] >> PM_LOWER_SH) & PM_LOWER_MSK;
390 if (unit) {
391 if (!pmc)
392 ++pmc_grp_use[byte & 1];
393 if (unit == 6 || unit == 8)
394 /* map alt ISU1/IFU codes: 6->2, 8->3 */
395 unit = (unit >> 1) - 1;
396 if (busbyte[byte] && busbyte[byte] != unit)
397 return -1;
398 busbyte[byte] = unit;
399 lower <<= unit;
400 if (unituse[unit] && lower != (unitlower & lower))
401 return -1;
402 unituse[unit] = 1;
403 unitlower |= lower;
404 }
405 }
406 if (pmc_grp_use[0] > 4 || pmc_grp_use[1] > 4)
407 return -1;
408
409 /*
410 * Assign resources and set multiplexer selects.
411 *
412 * Units 1,2,3 are on TTM0, 4,6,7 on TTM1, 8,10 on TTM2.
413 * Each TTMx can only select one unit, but since
414 * units 2 and 6 are both ISU1, and 3 and 8 are both IFU,
415 * we have some choices.
416 */
417 if (unituse[2] & (unituse[1] | (unituse[3] & unituse[9]))) {
418 unituse[6] = 1; /* Move 2 to 6 */
419 unituse[2] = 0;
420 }
421 if (unituse[3] & (unituse[1] | unituse[2])) {
422 unituse[8] = 1; /* Move 3 to 8 */
423 unituse[3] = 0;
424 unitlower = (unitlower & ~8) | ((unitlower & 8) << 5);
425 }
426 /* Check only one unit per TTMx */
427 if (unituse[1] + unituse[2] + unituse[3] > 1 ||
428 unituse[4] + unituse[6] + unituse[7] > 1 ||
429 unituse[8] + unituse[9] > 1 ||
430 (unituse[5] | unituse[10] | unituse[11] |
431 unituse[13] | unituse[14]))
432 return -1;
433
434 /* Set TTMxSEL fields. Note, units 1-3 => TTM0SEL codes 0-2 */
435 mmcr1 |= (unsigned long)(unituse[3] * 2 + unituse[2])
436 << MMCR1_TTM0SEL_SH;
437 mmcr1 |= (unsigned long)(unituse[7] * 3 + unituse[6] * 2)
438 << MMCR1_TTM1SEL_SH;
439 mmcr1 |= (unsigned long)unituse[9] << MMCR1_TTM2SEL_SH;
440
441 /* Set TTCxSEL fields. */
442 if (unitlower & 0xe)
443 mmcr1 |= 1ull << MMCR1_TTC0SEL_SH;
444 if (unitlower & 0xf0)
445 mmcr1 |= 1ull << MMCR1_TTC1SEL_SH;
446 if (unitlower & 0xf00)
447 mmcr1 |= 1ull << MMCR1_TTC2SEL_SH;
448 if (unitlower & 0x7000)
449 mmcr1 |= 1ull << MMCR1_TTC3SEL_SH;
450
451 /* Set byte lane select fields. */
452 for (byte = 0; byte < 4; ++byte) {
453 unit = busbyte[byte];
454 if (!unit)
455 continue;
456 if (unit == 0xf) {
457 /* special case for GPS */
458 mmcr1 |= 1ull << (MMCR1_DEBUG0SEL_SH - byte);
459 } else {
460 if (!unituse[unit])
461 ttm = unit - 1; /* 2->1, 3->2 */
462 else
463 ttm = unit >> 2;
464 mmcr1 |= (unsigned long)ttm
465 << (MMCR1_TD_CP_DBG0SEL_SH - 2 * byte);
466 }
467 }
468
469 /* Second pass: assign PMCs, set PMCxSEL and PMCx_ADDER_SEL fields */
470 for (i = 0; i < n_ev; ++i) {
471 pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
472 unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
473 byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
474 psel = event[i] & PM_PMCSEL_MSK;
475 if (!pmc) {
476 /* Bus event or 00xxx direct event (off or cycles) */
477 if (unit)
478 psel |= 0x10 | ((byte & 2) << 2);
479 for (pmc = 0; pmc < 8; ++pmc) {
480 if (pmc_inuse & (1 << pmc))
481 continue;
482 grp = (pmc >> 1) & 1;
483 if (unit) {
484 if (grp == (byte & 1))
485 break;
486 } else if (pmc_grp_use[grp] < 4) {
487 ++pmc_grp_use[grp];
488 break;
489 }
490 }
491 pmc_inuse |= 1 << pmc;
492 } else {
493 /* Direct event */
494 --pmc;
495 if (psel == 0 && (byte & 2))
496 /* add events on higher-numbered bus */
497 mmcr1 |= 1ull << mmcr1_adder_bits[pmc];
498 else if (psel == 6 && byte == 3)
499 /* seem to need to set sample_enable here */
500 mmcra |= MMCRA_SAMPLE_ENABLE;
501 psel |= 8;
502 }
503 if (pmc <= 1)
504 mmcr0 |= psel << (MMCR0_PMC1SEL_SH - 7 * pmc);
505 else
506 mmcr1 |= psel << (MMCR1_PMC3SEL_SH - 5 * (pmc - 2));
507 if (pmc == 7) /* PMC8 */
508 mmcra |= (psel & 1) << MMCRA_PMC8SEL0_SH;
509 hwc[i] = pmc;
510 if (p4_marked_instr_event(event[i]))
511 mmcra |= MMCRA_SAMPLE_ENABLE;
512 }
513
514 if (pmc_inuse & 1)
515 mmcr0 |= MMCR0_PMC1CE;
516 if (pmc_inuse & 0xfe)
517 mmcr0 |= MMCR0_PMCjCE;
518
519 mmcra |= 0x2000; /* mark only one IOP per PPC instruction */
520
521 /* Return MMCRx values */
522 mmcr[0] = mmcr0;
523 mmcr[1] = mmcr1;
524 mmcr[2] = mmcra;
525 return 0;
526 }
527
528 static void p4_disable_pmc(unsigned int pmc, unsigned long mmcr[])
529 {
530 /*
531 * Setting the PMCxSEL field to 0 disables PMC x.
532 * (Note that pmc is 0-based here, not 1-based.)
533 */
534 if (pmc <= 1) {
535 mmcr[0] &= ~(0x1fUL << (MMCR0_PMC1SEL_SH - 7 * pmc));
536 } else {
537 mmcr[1] &= ~(0x1fUL << (MMCR1_PMC3SEL_SH - 5 * (pmc - 2)));
538 if (pmc == 7)
539 mmcr[2] &= ~(1UL << MMCRA_PMC8SEL0_SH);
540 }
541 }
542
543 static int p4_generic_events[] = {
544 [PERF_COUNT_HW_CPU_CYCLES] = 7,
545 [PERF_COUNT_HW_INSTRUCTIONS] = 0x1001,
546 [PERF_COUNT_HW_CACHE_REFERENCES] = 0x8c10, /* PM_LD_REF_L1 */
547 [PERF_COUNT_HW_CACHE_MISSES] = 0x3c10, /* PM_LD_MISS_L1 */
548 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x330, /* PM_BR_ISSUED */
549 [PERF_COUNT_HW_BRANCH_MISSES] = 0x331, /* PM_BR_MPRED_CR */
550 };
551
552 #define C(x) PERF_COUNT_HW_CACHE_##x
553
554 /*
555 * Table of generalized cache-related events.
556 * 0 means not supported, -1 means nonsensical, other values
557 * are event codes.
558 */
559 static int power4_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
560 [C(L1D)] = { /* RESULT_ACCESS RESULT_MISS */
561 [C(OP_READ)] = { 0x8c10, 0x3c10 },
562 [C(OP_WRITE)] = { 0x7c10, 0xc13 },
563 [C(OP_PREFETCH)] = { 0xc35, 0 },
564 },
565 [C(L1I)] = { /* RESULT_ACCESS RESULT_MISS */
566 [C(OP_READ)] = { 0, 0 },
567 [C(OP_WRITE)] = { -1, -1 },
568 [C(OP_PREFETCH)] = { 0, 0 },
569 },
570 [C(LL)] = { /* RESULT_ACCESS RESULT_MISS */
571 [C(OP_READ)] = { 0, 0 },
572 [C(OP_WRITE)] = { 0, 0 },
573 [C(OP_PREFETCH)] = { 0xc34, 0 },
574 },
575 [C(DTLB)] = { /* RESULT_ACCESS RESULT_MISS */
576 [C(OP_READ)] = { 0, 0x904 },
577 [C(OP_WRITE)] = { -1, -1 },
578 [C(OP_PREFETCH)] = { -1, -1 },
579 },
580 [C(ITLB)] = { /* RESULT_ACCESS RESULT_MISS */
581 [C(OP_READ)] = { 0, 0x900 },
582 [C(OP_WRITE)] = { -1, -1 },
583 [C(OP_PREFETCH)] = { -1, -1 },
584 },
585 [C(BPU)] = { /* RESULT_ACCESS RESULT_MISS */
586 [C(OP_READ)] = { 0x330, 0x331 },
587 [C(OP_WRITE)] = { -1, -1 },
588 [C(OP_PREFETCH)] = { -1, -1 },
589 },
590 };
591
592 static struct power_pmu power4_pmu = {
593 .name = "POWER4/4+",
594 .n_counter = 8,
595 .max_alternatives = 5,
596 .add_fields = 0x0000001100005555ul,
597 .test_adder = 0x0011083300000000ul,
598 .compute_mmcr = p4_compute_mmcr,
599 .get_constraint = p4_get_constraint,
600 .get_alternatives = p4_get_alternatives,
601 .disable_pmc = p4_disable_pmc,
602 .n_generic = ARRAY_SIZE(p4_generic_events),
603 .generic_events = p4_generic_events,
604 .cache_events = &power4_cache_events,
605 };
606
607 static int init_power4_pmu(void)
608 {
609 if (!cur_cpu_spec->oprofile_cpu_type ||
610 strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power4"))
611 return -ENODEV;
612
613 return register_power_pmu(&power4_pmu);
614 }
615
616 arch_initcall(init_power4_pmu);
Tomato firmware and modifications.