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aabbaa60 | 1 | /* |
f708223d | 2 | * Performance counter support for POWER5+/++ (not POWER5) processors. |
aabbaa60 PM |
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_counter.h> | |
13 | #include <asm/reg.h> | |
14 | ||
15 | /* | |
16 | * Bits in event code for POWER5+ (POWER5 GS) and POWER5++ (POWER5 GS DD3) | |
17 | */ | |
18 | #define PM_PMC_SH 20 /* PMC number (1-based) for direct events */ | |
19 | #define PM_PMC_MSK 0xf | |
20 | #define PM_PMC_MSKS (PM_PMC_MSK << PM_PMC_SH) | |
21 | #define PM_UNIT_SH 16 /* TTMMUX number and setting - unit select */ | |
22 | #define PM_UNIT_MSK 0xf | |
23 | #define PM_BYTE_SH 12 /* Byte number of event bus to use */ | |
24 | #define PM_BYTE_MSK 7 | |
25 | #define PM_GRS_SH 8 /* Storage subsystem mux select */ | |
26 | #define PM_GRS_MSK 7 | |
27 | #define PM_BUSEVENT_MSK 0x80 /* Set if event uses event bus */ | |
28 | #define PM_PMCSEL_MSK 0x7f | |
29 | ||
30 | /* Values in PM_UNIT field */ | |
31 | #define PM_FPU 0 | |
32 | #define PM_ISU0 1 | |
33 | #define PM_IFU 2 | |
34 | #define PM_ISU1 3 | |
35 | #define PM_IDU 4 | |
36 | #define PM_ISU0_ALT 6 | |
37 | #define PM_GRS 7 | |
38 | #define PM_LSU0 8 | |
39 | #define PM_LSU1 0xc | |
40 | #define PM_LASTUNIT 0xc | |
41 | ||
42 | /* | |
43 | * Bits in MMCR1 for POWER5+ | |
44 | */ | |
45 | #define MMCR1_TTM0SEL_SH 62 | |
46 | #define MMCR1_TTM1SEL_SH 60 | |
47 | #define MMCR1_TTM2SEL_SH 58 | |
48 | #define MMCR1_TTM3SEL_SH 56 | |
49 | #define MMCR1_TTMSEL_MSK 3 | |
50 | #define MMCR1_TD_CP_DBG0SEL_SH 54 | |
51 | #define MMCR1_TD_CP_DBG1SEL_SH 52 | |
52 | #define MMCR1_TD_CP_DBG2SEL_SH 50 | |
53 | #define MMCR1_TD_CP_DBG3SEL_SH 48 | |
54 | #define MMCR1_GRS_L2SEL_SH 46 | |
55 | #define MMCR1_GRS_L2SEL_MSK 3 | |
56 | #define MMCR1_GRS_L3SEL_SH 44 | |
57 | #define MMCR1_GRS_L3SEL_MSK 3 | |
58 | #define MMCR1_GRS_MCSEL_SH 41 | |
59 | #define MMCR1_GRS_MCSEL_MSK 7 | |
60 | #define MMCR1_GRS_FABSEL_SH 39 | |
61 | #define MMCR1_GRS_FABSEL_MSK 3 | |
62 | #define MMCR1_PMC1_ADDER_SEL_SH 35 | |
63 | #define MMCR1_PMC2_ADDER_SEL_SH 34 | |
64 | #define MMCR1_PMC3_ADDER_SEL_SH 33 | |
65 | #define MMCR1_PMC4_ADDER_SEL_SH 32 | |
66 | #define MMCR1_PMC1SEL_SH 25 | |
67 | #define MMCR1_PMC2SEL_SH 17 | |
68 | #define MMCR1_PMC3SEL_SH 9 | |
69 | #define MMCR1_PMC4SEL_SH 1 | |
70 | #define MMCR1_PMCSEL_SH(n) (MMCR1_PMC1SEL_SH - (n) * 8) | |
71 | #define MMCR1_PMCSEL_MSK 0x7f | |
72 | ||
73 | /* | |
74 | * Bits in MMCRA | |
75 | */ | |
76 | ||
77 | /* | |
78 | * Layout of constraint bits: | |
79 | * 6666555555555544444444443333333333222222222211111111110000000000 | |
80 | * 3210987654321098765432109876543210987654321098765432109876543210 | |
ab7ef2e5 PM |
81 | * [ ><><>< ><> <><>[ > < >< >< >< ><><><><><><> |
82 | * NC G0G1G2 G3 T0T1 UC B0 B1 B2 B3 P6P5P4P3P2P1 | |
aabbaa60 PM |
83 | * |
84 | * NC - number of counters | |
85 | * 51: NC error 0x0008_0000_0000_0000 | |
86 | * 48-50: number of events needing PMC1-4 0x0007_0000_0000_0000 | |
87 | * | |
88 | * G0..G3 - GRS mux constraints | |
89 | * 46-47: GRS_L2SEL value | |
90 | * 44-45: GRS_L3SEL value | |
91 | * 41-44: GRS_MCSEL value | |
92 | * 39-40: GRS_FABSEL value | |
93 | * Note that these match up with their bit positions in MMCR1 | |
94 | * | |
95 | * T0 - TTM0 constraint | |
96 | * 36-37: TTM0SEL value (0=FPU, 2=IFU, 3=ISU1) 0x30_0000_0000 | |
97 | * | |
98 | * T1 - TTM1 constraint | |
99 | * 34-35: TTM1SEL value (0=IDU, 3=GRS) 0x0c_0000_0000 | |
100 | * | |
101 | * UC - unit constraint: can't have all three of FPU|IFU|ISU1, ISU0, IDU|GRS | |
102 | * 33: UC3 error 0x02_0000_0000 | |
103 | * 32: FPU|IFU|ISU1 events needed 0x01_0000_0000 | |
104 | * 31: ISU0 events needed 0x01_8000_0000 | |
105 | * 30: IDU|GRS events needed 0x00_4000_0000 | |
106 | * | |
107 | * B0 | |
ab7ef2e5 | 108 | * 24-27: Byte 0 event source 0x0f00_0000 |
aabbaa60 PM |
109 | * Encoding as for the event code |
110 | * | |
111 | * B1, B2, B3 | |
ab7ef2e5 | 112 | * 20-23, 16-19, 12-15: Byte 1, 2, 3 event sources |
aabbaa60 | 113 | * |
ab7ef2e5 PM |
114 | * P6 |
115 | * 11: P6 error 0x800 | |
116 | * 10-11: Count of events needing PMC6 | |
aabbaa60 | 117 | * |
ab7ef2e5 PM |
118 | * P1..P5 |
119 | * 0-9: Count of events needing PMC1..PMC5 | |
aabbaa60 PM |
120 | */ |
121 | ||
122 | static const int grsel_shift[8] = { | |
123 | MMCR1_GRS_L2SEL_SH, MMCR1_GRS_L2SEL_SH, MMCR1_GRS_L2SEL_SH, | |
124 | MMCR1_GRS_L3SEL_SH, MMCR1_GRS_L3SEL_SH, MMCR1_GRS_L3SEL_SH, | |
125 | MMCR1_GRS_MCSEL_SH, MMCR1_GRS_FABSEL_SH | |
126 | }; | |
127 | ||
128 | /* Masks and values for using events from the various units */ | |
129 | static u64 unit_cons[PM_LASTUNIT+1][2] = { | |
130 | [PM_FPU] = { 0x3200000000ull, 0x0100000000ull }, | |
131 | [PM_ISU0] = { 0x0200000000ull, 0x0080000000ull }, | |
132 | [PM_ISU1] = { 0x3200000000ull, 0x3100000000ull }, | |
133 | [PM_IFU] = { 0x3200000000ull, 0x2100000000ull }, | |
134 | [PM_IDU] = { 0x0e00000000ull, 0x0040000000ull }, | |
135 | [PM_GRS] = { 0x0e00000000ull, 0x0c40000000ull }, | |
136 | }; | |
137 | ||
138 | static int power5p_get_constraint(unsigned int event, u64 *maskp, u64 *valp) | |
139 | { | |
140 | int pmc, byte, unit, sh; | |
141 | int bit, fmask; | |
142 | u64 mask = 0, value = 0; | |
143 | ||
144 | pmc = (event >> PM_PMC_SH) & PM_PMC_MSK; | |
145 | if (pmc) { | |
ab7ef2e5 | 146 | if (pmc > 6) |
aabbaa60 PM |
147 | return -1; |
148 | sh = (pmc - 1) * 2; | |
149 | mask |= 2 << sh; | |
150 | value |= 1 << sh; | |
ab7ef2e5 PM |
151 | if (pmc >= 5 && !(event == 0x500009 || event == 0x600005)) |
152 | return -1; | |
aabbaa60 PM |
153 | } |
154 | if (event & PM_BUSEVENT_MSK) { | |
155 | unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK; | |
156 | if (unit > PM_LASTUNIT) | |
157 | return -1; | |
158 | if (unit == PM_ISU0_ALT) | |
159 | unit = PM_ISU0; | |
160 | mask |= unit_cons[unit][0]; | |
161 | value |= unit_cons[unit][1]; | |
162 | byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK; | |
163 | if (byte >= 4) { | |
164 | if (unit != PM_LSU1) | |
165 | return -1; | |
166 | /* Map LSU1 low word (bytes 4-7) to unit LSU1+1 */ | |
167 | ++unit; | |
168 | byte &= 3; | |
169 | } | |
170 | if (unit == PM_GRS) { | |
171 | bit = event & 7; | |
172 | fmask = (bit == 6)? 7: 3; | |
173 | sh = grsel_shift[bit]; | |
174 | mask |= (u64)fmask << sh; | |
175 | value |= (u64)((event >> PM_GRS_SH) & fmask) << sh; | |
176 | } | |
177 | /* Set byte lane select field */ | |
ab7ef2e5 PM |
178 | mask |= 0xfULL << (24 - 4 * byte); |
179 | value |= (u64)unit << (24 - 4 * byte); | |
180 | } | |
181 | if (pmc < 5) { | |
182 | /* need a counter from PMC1-4 set */ | |
183 | mask |= 0x8000000000000ull; | |
184 | value |= 0x1000000000000ull; | |
aabbaa60 | 185 | } |
aabbaa60 PM |
186 | *maskp = mask; |
187 | *valp = value; | |
188 | return 0; | |
189 | } | |
190 | ||
ab7ef2e5 PM |
191 | static int power5p_limited_pmc_event(unsigned int event) |
192 | { | |
193 | int pmc = (event >> PM_PMC_SH) & PM_PMC_MSK; | |
194 | ||
195 | return pmc == 5 || pmc == 6; | |
196 | } | |
197 | ||
aabbaa60 PM |
198 | #define MAX_ALT 3 /* at most 3 alternatives for any event */ |
199 | ||
200 | static const unsigned int event_alternatives[][MAX_ALT] = { | |
201 | { 0x100c0, 0x40001f }, /* PM_GCT_FULL_CYC */ | |
202 | { 0x120e4, 0x400002 }, /* PM_GRP_DISP_REJECT */ | |
203 | { 0x230e2, 0x323087 }, /* PM_BR_PRED_CR */ | |
204 | { 0x230e3, 0x223087, 0x3230a0 }, /* PM_BR_PRED_TA */ | |
205 | { 0x410c7, 0x441084 }, /* PM_THRD_L2MISS_BOTH_CYC */ | |
206 | { 0x800c4, 0xc20e0 }, /* PM_DTLB_MISS */ | |
207 | { 0xc50c6, 0xc60e0 }, /* PM_MRK_DTLB_MISS */ | |
ab7ef2e5 | 208 | { 0x100005, 0x600005 }, /* PM_RUN_CYC */ |
aabbaa60 PM |
209 | { 0x100009, 0x200009 }, /* PM_INST_CMPL */ |
210 | { 0x200015, 0x300015 }, /* PM_LSU_LMQ_SRQ_EMPTY_CYC */ | |
211 | { 0x300009, 0x400009 }, /* PM_INST_DISP */ | |
212 | }; | |
213 | ||
214 | /* | |
215 | * Scan the alternatives table for a match and return the | |
216 | * index into the alternatives table if found, else -1. | |
217 | */ | |
218 | static int find_alternative(unsigned int event) | |
219 | { | |
220 | int i, j; | |
221 | ||
222 | for (i = 0; i < ARRAY_SIZE(event_alternatives); ++i) { | |
223 | if (event < event_alternatives[i][0]) | |
224 | break; | |
225 | for (j = 0; j < MAX_ALT && event_alternatives[i][j]; ++j) | |
226 | if (event == event_alternatives[i][j]) | |
227 | return i; | |
228 | } | |
229 | return -1; | |
230 | } | |
231 | ||
232 | static const unsigned char bytedecode_alternatives[4][4] = { | |
233 | /* PMC 1 */ { 0x21, 0x23, 0x25, 0x27 }, | |
234 | /* PMC 2 */ { 0x07, 0x17, 0x0e, 0x1e }, | |
235 | /* PMC 3 */ { 0x20, 0x22, 0x24, 0x26 }, | |
236 | /* PMC 4 */ { 0x07, 0x17, 0x0e, 0x1e } | |
237 | }; | |
238 | ||
239 | /* | |
240 | * Some direct events for decodes of event bus byte 3 have alternative | |
241 | * PMCSEL values on other counters. This returns the alternative | |
242 | * event code for those that do, or -1 otherwise. This also handles | |
243 | * alternative PCMSEL values for add events. | |
244 | */ | |
245 | static int find_alternative_bdecode(unsigned int event) | |
246 | { | |
247 | int pmc, altpmc, pp, j; | |
248 | ||
249 | pmc = (event >> PM_PMC_SH) & PM_PMC_MSK; | |
250 | if (pmc == 0 || pmc > 4) | |
251 | return -1; | |
252 | altpmc = 5 - pmc; /* 1 <-> 4, 2 <-> 3 */ | |
253 | pp = event & PM_PMCSEL_MSK; | |
254 | for (j = 0; j < 4; ++j) { | |
255 | if (bytedecode_alternatives[pmc - 1][j] == pp) { | |
256 | return (event & ~(PM_PMC_MSKS | PM_PMCSEL_MSK)) | | |
257 | (altpmc << PM_PMC_SH) | | |
258 | bytedecode_alternatives[altpmc - 1][j]; | |
259 | } | |
260 | } | |
261 | ||
262 | /* new decode alternatives for power5+ */ | |
263 | if (pmc == 1 && (pp == 0x0d || pp == 0x0e)) | |
264 | return event + (2 << PM_PMC_SH) + (0x2e - 0x0d); | |
265 | if (pmc == 3 && (pp == 0x2e || pp == 0x2f)) | |
266 | return event - (2 << PM_PMC_SH) - (0x2e - 0x0d); | |
267 | ||
268 | /* alternative add event encodings */ | |
269 | if (pp == 0x10 || pp == 0x28) | |
270 | return ((event ^ (0x10 ^ 0x28)) & ~PM_PMC_MSKS) | | |
271 | (altpmc << PM_PMC_SH); | |
272 | ||
273 | return -1; | |
274 | } | |
275 | ||
ab7ef2e5 PM |
276 | static int power5p_get_alternatives(unsigned int event, unsigned int flags, |
277 | unsigned int alt[]) | |
aabbaa60 PM |
278 | { |
279 | int i, j, ae, nalt = 1; | |
ab7ef2e5 | 280 | int nlim; |
aabbaa60 PM |
281 | |
282 | alt[0] = event; | |
283 | nalt = 1; | |
ab7ef2e5 | 284 | nlim = power5p_limited_pmc_event(event); |
aabbaa60 PM |
285 | i = find_alternative(event); |
286 | if (i >= 0) { | |
287 | for (j = 0; j < MAX_ALT; ++j) { | |
288 | ae = event_alternatives[i][j]; | |
289 | if (ae && ae != event) | |
290 | alt[nalt++] = ae; | |
ab7ef2e5 | 291 | nlim += power5p_limited_pmc_event(ae); |
aabbaa60 PM |
292 | } |
293 | } else { | |
294 | ae = find_alternative_bdecode(event); | |
295 | if (ae > 0) | |
296 | alt[nalt++] = ae; | |
297 | } | |
ab7ef2e5 PM |
298 | |
299 | if (flags & PPMU_ONLY_COUNT_RUN) { | |
300 | /* | |
301 | * We're only counting in RUN state, | |
302 | * so PM_CYC is equivalent to PM_RUN_CYC | |
303 | * and PM_INST_CMPL === PM_RUN_INST_CMPL. | |
304 | * This doesn't include alternatives that don't provide | |
305 | * any extra flexibility in assigning PMCs (e.g. | |
306 | * 0x100005 for PM_RUN_CYC vs. 0xf for PM_CYC). | |
307 | * Note that even with these additional alternatives | |
308 | * we never end up with more than 3 alternatives for any event. | |
309 | */ | |
310 | j = nalt; | |
311 | for (i = 0; i < nalt; ++i) { | |
312 | switch (alt[i]) { | |
313 | case 0xf: /* PM_CYC */ | |
314 | alt[j++] = 0x600005; /* PM_RUN_CYC */ | |
315 | ++nlim; | |
316 | break; | |
317 | case 0x600005: /* PM_RUN_CYC */ | |
318 | alt[j++] = 0xf; | |
319 | break; | |
320 | case 0x100009: /* PM_INST_CMPL */ | |
321 | alt[j++] = 0x500009; /* PM_RUN_INST_CMPL */ | |
322 | ++nlim; | |
323 | break; | |
324 | case 0x500009: /* PM_RUN_INST_CMPL */ | |
325 | alt[j++] = 0x100009; /* PM_INST_CMPL */ | |
326 | alt[j++] = 0x200009; | |
327 | break; | |
328 | } | |
329 | } | |
330 | nalt = j; | |
331 | } | |
332 | ||
333 | if (!(flags & PPMU_LIMITED_PMC_OK) && nlim) { | |
334 | /* remove the limited PMC events */ | |
335 | j = 0; | |
336 | for (i = 0; i < nalt; ++i) { | |
337 | if (!power5p_limited_pmc_event(alt[i])) { | |
338 | alt[j] = alt[i]; | |
339 | ++j; | |
340 | } | |
341 | } | |
342 | nalt = j; | |
343 | } else if ((flags & PPMU_LIMITED_PMC_REQD) && nlim < nalt) { | |
344 | /* remove all but the limited PMC events */ | |
345 | j = 0; | |
346 | for (i = 0; i < nalt; ++i) { | |
347 | if (power5p_limited_pmc_event(alt[i])) { | |
348 | alt[j] = alt[i]; | |
349 | ++j; | |
350 | } | |
351 | } | |
352 | nalt = j; | |
353 | } | |
354 | ||
aabbaa60 PM |
355 | return nalt; |
356 | } | |
357 | ||
f708223d PM |
358 | /* |
359 | * Map of which direct events on which PMCs are marked instruction events. | |
360 | * Indexed by PMCSEL value, bit i (LE) set if PMC i is a marked event. | |
361 | * Bit 0 is set if it is marked for all PMCs. | |
362 | * The 0x80 bit indicates a byte decode PMCSEL value. | |
363 | */ | |
364 | static unsigned char direct_event_is_marked[0x28] = { | |
365 | 0, /* 00 */ | |
366 | 0x1f, /* 01 PM_IOPS_CMPL */ | |
367 | 0x2, /* 02 PM_MRK_GRP_DISP */ | |
368 | 0xe, /* 03 PM_MRK_ST_CMPL, PM_MRK_ST_GPS, PM_MRK_ST_CMPL_INT */ | |
369 | 0, /* 04 */ | |
370 | 0x1c, /* 05 PM_MRK_BRU_FIN, PM_MRK_INST_FIN, PM_MRK_CRU_FIN */ | |
371 | 0x80, /* 06 */ | |
372 | 0x80, /* 07 */ | |
373 | 0, 0, 0,/* 08 - 0a */ | |
374 | 0x18, /* 0b PM_THRESH_TIMEO, PM_MRK_GRP_TIMEO */ | |
375 | 0, /* 0c */ | |
376 | 0x80, /* 0d */ | |
377 | 0x80, /* 0e */ | |
378 | 0, /* 0f */ | |
379 | 0, /* 10 */ | |
380 | 0x14, /* 11 PM_MRK_GRP_BR_REDIR, PM_MRK_GRP_IC_MISS */ | |
381 | 0, /* 12 */ | |
382 | 0x10, /* 13 PM_MRK_GRP_CMPL */ | |
383 | 0x1f, /* 14 PM_GRP_MRK, PM_MRK_{FXU,FPU,LSU}_FIN */ | |
384 | 0x2, /* 15 PM_MRK_GRP_ISSUED */ | |
385 | 0x80, /* 16 */ | |
386 | 0x80, /* 17 */ | |
387 | 0, 0, 0, 0, 0, | |
388 | 0x80, /* 1d */ | |
389 | 0x80, /* 1e */ | |
390 | 0, /* 1f */ | |
391 | 0x80, /* 20 */ | |
392 | 0x80, /* 21 */ | |
393 | 0x80, /* 22 */ | |
394 | 0x80, /* 23 */ | |
395 | 0x80, /* 24 */ | |
396 | 0x80, /* 25 */ | |
397 | 0x80, /* 26 */ | |
398 | 0x80, /* 27 */ | |
399 | }; | |
400 | ||
401 | /* | |
402 | * Returns 1 if event counts things relating to marked instructions | |
403 | * and thus needs the MMCRA_SAMPLE_ENABLE bit set, or 0 if not. | |
404 | */ | |
405 | static int power5p_marked_instr_event(unsigned int event) | |
406 | { | |
407 | int pmc, psel; | |
408 | int bit, byte, unit; | |
409 | u32 mask; | |
410 | ||
411 | pmc = (event >> PM_PMC_SH) & PM_PMC_MSK; | |
412 | psel = event & PM_PMCSEL_MSK; | |
413 | if (pmc >= 5) | |
414 | return 0; | |
415 | ||
416 | bit = -1; | |
417 | if (psel < sizeof(direct_event_is_marked)) { | |
418 | if (direct_event_is_marked[psel] & (1 << pmc)) | |
419 | return 1; | |
420 | if (direct_event_is_marked[psel] & 0x80) | |
421 | bit = 4; | |
422 | else if (psel == 0x08) | |
423 | bit = pmc - 1; | |
424 | else if (psel == 0x10) | |
425 | bit = 4 - pmc; | |
426 | else if (psel == 0x1b && (pmc == 1 || pmc == 3)) | |
427 | bit = 4; | |
428 | } else if ((psel & 0x48) == 0x40) { | |
429 | bit = psel & 7; | |
430 | } else if (psel == 0x28) { | |
431 | bit = pmc - 1; | |
432 | } else if (pmc == 3 && (psel == 0x2e || psel == 0x2f)) { | |
433 | bit = 4; | |
434 | } | |
435 | ||
436 | if (!(event & PM_BUSEVENT_MSK) || bit == -1) | |
437 | return 0; | |
438 | ||
439 | byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK; | |
440 | unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK; | |
441 | if (unit == PM_LSU0) { | |
442 | /* byte 1 bits 0-7, byte 2 bits 0,2-4,6 */ | |
443 | mask = 0x5dff00; | |
444 | } else if (unit == PM_LSU1 && byte >= 4) { | |
445 | byte -= 4; | |
446 | /* byte 5 bits 6-7, byte 6 bits 0,4, byte 7 bits 0-4,6 */ | |
447 | mask = 0x5f11c000; | |
448 | } else | |
449 | return 0; | |
450 | ||
451 | return (mask >> (byte * 8 + bit)) & 1; | |
452 | } | |
453 | ||
aabbaa60 PM |
454 | static int power5p_compute_mmcr(unsigned int event[], int n_ev, |
455 | unsigned int hwc[], u64 mmcr[]) | |
456 | { | |
457 | u64 mmcr1 = 0; | |
f708223d | 458 | u64 mmcra = 0; |
aabbaa60 PM |
459 | unsigned int pmc, unit, byte, psel; |
460 | unsigned int ttm; | |
461 | int i, isbus, bit, grsel; | |
462 | unsigned int pmc_inuse = 0; | |
463 | unsigned char busbyte[4]; | |
464 | unsigned char unituse[16]; | |
465 | int ttmuse; | |
466 | ||
ab7ef2e5 | 467 | if (n_ev > 6) |
aabbaa60 PM |
468 | return -1; |
469 | ||
470 | /* First pass to count resource use */ | |
471 | memset(busbyte, 0, sizeof(busbyte)); | |
472 | memset(unituse, 0, sizeof(unituse)); | |
473 | for (i = 0; i < n_ev; ++i) { | |
474 | pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK; | |
475 | if (pmc) { | |
ab7ef2e5 | 476 | if (pmc > 6) |
aabbaa60 PM |
477 | return -1; |
478 | if (pmc_inuse & (1 << (pmc - 1))) | |
479 | return -1; | |
480 | pmc_inuse |= 1 << (pmc - 1); | |
481 | } | |
482 | if (event[i] & PM_BUSEVENT_MSK) { | |
483 | unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK; | |
484 | byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK; | |
485 | if (unit > PM_LASTUNIT) | |
486 | return -1; | |
487 | if (unit == PM_ISU0_ALT) | |
488 | unit = PM_ISU0; | |
489 | if (byte >= 4) { | |
490 | if (unit != PM_LSU1) | |
491 | return -1; | |
492 | ++unit; | |
493 | byte &= 3; | |
494 | } | |
495 | if (busbyte[byte] && busbyte[byte] != unit) | |
496 | return -1; | |
497 | busbyte[byte] = unit; | |
498 | unituse[unit] = 1; | |
499 | } | |
500 | } | |
501 | ||
502 | /* | |
503 | * Assign resources and set multiplexer selects. | |
504 | * | |
505 | * PM_ISU0 can go either on TTM0 or TTM1, but that's the only | |
506 | * choice we have to deal with. | |
507 | */ | |
508 | if (unituse[PM_ISU0] & | |
509 | (unituse[PM_FPU] | unituse[PM_IFU] | unituse[PM_ISU1])) { | |
510 | unituse[PM_ISU0_ALT] = 1; /* move ISU to TTM1 */ | |
511 | unituse[PM_ISU0] = 0; | |
512 | } | |
513 | /* Set TTM[01]SEL fields. */ | |
514 | ttmuse = 0; | |
515 | for (i = PM_FPU; i <= PM_ISU1; ++i) { | |
516 | if (!unituse[i]) | |
517 | continue; | |
518 | if (ttmuse++) | |
519 | return -1; | |
520 | mmcr1 |= (u64)i << MMCR1_TTM0SEL_SH; | |
521 | } | |
522 | ttmuse = 0; | |
523 | for (; i <= PM_GRS; ++i) { | |
524 | if (!unituse[i]) | |
525 | continue; | |
526 | if (ttmuse++) | |
527 | return -1; | |
528 | mmcr1 |= (u64)(i & 3) << MMCR1_TTM1SEL_SH; | |
529 | } | |
530 | if (ttmuse > 1) | |
531 | return -1; | |
532 | ||
533 | /* Set byte lane select fields, TTM[23]SEL and GRS_*SEL. */ | |
534 | for (byte = 0; byte < 4; ++byte) { | |
535 | unit = busbyte[byte]; | |
536 | if (!unit) | |
537 | continue; | |
538 | if (unit == PM_ISU0 && unituse[PM_ISU0_ALT]) { | |
539 | /* get ISU0 through TTM1 rather than TTM0 */ | |
540 | unit = PM_ISU0_ALT; | |
541 | } else if (unit == PM_LSU1 + 1) { | |
542 | /* select lower word of LSU1 for this byte */ | |
543 | mmcr1 |= 1ull << (MMCR1_TTM3SEL_SH + 3 - byte); | |
544 | } | |
545 | ttm = unit >> 2; | |
546 | mmcr1 |= (u64)ttm << (MMCR1_TD_CP_DBG0SEL_SH - 2 * byte); | |
547 | } | |
548 | ||
549 | /* Second pass: assign PMCs, set PMCxSEL and PMCx_ADDER_SEL fields */ | |
550 | for (i = 0; i < n_ev; ++i) { | |
551 | pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK; | |
552 | unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK; | |
553 | byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK; | |
554 | psel = event[i] & PM_PMCSEL_MSK; | |
555 | isbus = event[i] & PM_BUSEVENT_MSK; | |
556 | if (!pmc) { | |
557 | /* Bus event or any-PMC direct event */ | |
558 | for (pmc = 0; pmc < 4; ++pmc) { | |
559 | if (!(pmc_inuse & (1 << pmc))) | |
560 | break; | |
561 | } | |
562 | if (pmc >= 4) | |
563 | return -1; | |
564 | pmc_inuse |= 1 << pmc; | |
ab7ef2e5 | 565 | } else if (pmc <= 4) { |
aabbaa60 PM |
566 | /* Direct event */ |
567 | --pmc; | |
568 | if (isbus && (byte & 2) && | |
569 | (psel == 8 || psel == 0x10 || psel == 0x28)) | |
570 | /* add events on higher-numbered bus */ | |
571 | mmcr1 |= 1ull << (MMCR1_PMC1_ADDER_SEL_SH - pmc); | |
ab7ef2e5 PM |
572 | } else { |
573 | /* Instructions or run cycles on PMC5/6 */ | |
574 | --pmc; | |
aabbaa60 PM |
575 | } |
576 | if (isbus && unit == PM_GRS) { | |
577 | bit = psel & 7; | |
578 | grsel = (event[i] >> PM_GRS_SH) & PM_GRS_MSK; | |
579 | mmcr1 |= (u64)grsel << grsel_shift[bit]; | |
580 | } | |
f708223d PM |
581 | if (power5p_marked_instr_event(event[i])) |
582 | mmcra |= MMCRA_SAMPLE_ENABLE; | |
aabbaa60 PM |
583 | if ((psel & 0x58) == 0x40 && (byte & 1) != ((pmc >> 1) & 1)) |
584 | /* select alternate byte lane */ | |
585 | psel |= 0x10; | |
586 | if (pmc <= 3) | |
587 | mmcr1 |= psel << MMCR1_PMCSEL_SH(pmc); | |
588 | hwc[i] = pmc; | |
589 | } | |
590 | ||
591 | /* Return MMCRx values */ | |
592 | mmcr[0] = 0; | |
593 | if (pmc_inuse & 1) | |
594 | mmcr[0] = MMCR0_PMC1CE; | |
595 | if (pmc_inuse & 0x3e) | |
596 | mmcr[0] |= MMCR0_PMCjCE; | |
597 | mmcr[1] = mmcr1; | |
f708223d | 598 | mmcr[2] = mmcra; |
aabbaa60 PM |
599 | return 0; |
600 | } | |
601 | ||
602 | static void power5p_disable_pmc(unsigned int pmc, u64 mmcr[]) | |
603 | { | |
604 | if (pmc <= 3) | |
605 | mmcr[1] &= ~(0x7fUL << MMCR1_PMCSEL_SH(pmc)); | |
606 | } | |
607 | ||
608 | static int power5p_generic_events[] = { | |
609 | [PERF_COUNT_CPU_CYCLES] = 0xf, | |
610 | [PERF_COUNT_INSTRUCTIONS] = 0x100009, | |
611 | [PERF_COUNT_CACHE_REFERENCES] = 0x1c10a8, /* LD_REF_L1 */ | |
612 | [PERF_COUNT_CACHE_MISSES] = 0x3c1088, /* LD_MISS_L1 */ | |
613 | [PERF_COUNT_BRANCH_INSTRUCTIONS] = 0x230e4, /* BR_ISSUED */ | |
614 | [PERF_COUNT_BRANCH_MISSES] = 0x230e5, /* BR_MPRED_CR */ | |
615 | }; | |
616 | ||
617 | struct power_pmu power5p_pmu = { | |
ab7ef2e5 | 618 | .n_counter = 6, |
aabbaa60 PM |
619 | .max_alternatives = MAX_ALT, |
620 | .add_fields = 0x7000000000055ull, | |
621 | .test_adder = 0x3000040000000ull, | |
622 | .compute_mmcr = power5p_compute_mmcr, | |
623 | .get_constraint = power5p_get_constraint, | |
624 | .get_alternatives = power5p_get_alternatives, | |
625 | .disable_pmc = power5p_disable_pmc, | |
626 | .n_generic = ARRAY_SIZE(power5p_generic_events), | |
627 | .generic_events = power5p_generic_events, | |
ab7ef2e5 PM |
628 | .limited_pmc5_6 = 1, |
629 | .limited_pmc_event = power5p_limited_pmc_event, | |
aabbaa60 | 630 | }; |