arch/powerpc/perf/power5+-pmu.c

   1 /*
   2  * Performance counter support for POWER5+/++ (not POWER5) 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 POWER5+ (POWER5 GS) and POWER5++ (POWER5 GS DD3)
  19  */
  20 #define PM_PMC_SH       20      /* PMC number (1-based) for direct events */
  21 #define PM_PMC_MSK      0xf
  22 #define PM_PMC_MSKS     (PM_PMC_MSK << PM_PMC_SH)
  23 #define PM_UNIT_SH      16      /* TTMMUX number and setting - unit select */
  24 #define PM_UNIT_MSK     0xf
  25 #define PM_BYTE_SH      12      /* Byte number of event bus to use */
  26 #define PM_BYTE_MSK     7
  27 #define PM_GRS_SH       8       /* Storage subsystem mux select */
  28 #define PM_GRS_MSK      7
  29 #define PM_BUSEVENT_MSK 0x80    /* Set if event uses event bus */
  30 #define PM_PMCSEL_MSK   0x7f
  31
  32 /* Values in PM_UNIT field */
  33 #define PM_FPU          0
  34 #define PM_ISU0         1
  35 #define PM_IFU          2
  36 #define PM_ISU1         3
  37 #define PM_IDU          4
  38 #define PM_ISU0_ALT     6
  39 #define PM_GRS          7
  40 #define PM_LSU0         8
  41 #define PM_LSU1         0xc
  42 #define PM_LASTUNIT     0xc
  43
  44 /*
  45  * Bits in MMCR1 for POWER5+
  46  */
  47 #define MMCR1_TTM0SEL_SH        62
  48 #define MMCR1_TTM1SEL_SH        60
  49 #define MMCR1_TTM2SEL_SH        58
  50 #define MMCR1_TTM3SEL_SH        56
  51 #define MMCR1_TTMSEL_MSK        3
  52 #define MMCR1_TD_CP_DBG0SEL_SH  54
  53 #define MMCR1_TD_CP_DBG1SEL_SH  52
  54 #define MMCR1_TD_CP_DBG2SEL_SH  50
  55 #define MMCR1_TD_CP_DBG3SEL_SH  48
  56 #define MMCR1_GRS_L2SEL_SH      46
  57 #define MMCR1_GRS_L2SEL_MSK     3
  58 #define MMCR1_GRS_L3SEL_SH      44
  59 #define MMCR1_GRS_L3SEL_MSK     3
  60 #define MMCR1_GRS_MCSEL_SH      41
  61 #define MMCR1_GRS_MCSEL_MSK     7
  62 #define MMCR1_GRS_FABSEL_SH     39
  63 #define MMCR1_GRS_FABSEL_MSK    3
  64 #define MMCR1_PMC1_ADDER_SEL_SH 35
  65 #define MMCR1_PMC2_ADDER_SEL_SH 34
  66 #define MMCR1_PMC3_ADDER_SEL_SH 33
  67 #define MMCR1_PMC4_ADDER_SEL_SH 32
  68 #define MMCR1_PMC1SEL_SH        25
  69 #define MMCR1_PMC2SEL_SH        17
  70 #define MMCR1_PMC3SEL_SH        9
  71 #define MMCR1_PMC4SEL_SH        1
  72 #define MMCR1_PMCSEL_SH(n)      (MMCR1_PMC1SEL_SH - (n) * 8)
  73 #define MMCR1_PMCSEL_MSK        0x7f
  74
  75 /*
  76  * Layout of constraint bits:
  77  * 6666555555555544444444443333333333222222222211111111110000000000
  78  * 3210987654321098765432109876543210987654321098765432109876543210
  79  *             [  ><><>< ><> <><>[  >  <  ><  ><  ><  ><><><><><><>
  80  *             NC  G0G1G2 G3 T0T1 UC    B0  B1  B2  B3 P6P5P4P3P2P1
  81  *
  82  * NC - number of counters
  83  *     51: NC error 0x0008_0000_0000_0000
  84  *     48-50: number of events needing PMC1-4 0x0007_0000_0000_0000
  85  *
  86  * G0..G3 - GRS mux constraints
  87  *     46-47: GRS_L2SEL value
  88  *     44-45: GRS_L3SEL value
  89  *     41-44: GRS_MCSEL value
  90  *     39-40: GRS_FABSEL value
  91  *      Note that these match up with their bit positions in MMCR1
  92  *
  93  * T0 - TTM0 constraint
  94  *     36-37: TTM0SEL value (0=FPU, 2=IFU, 3=ISU1) 0x30_0000_0000
  95  *
  96  * T1 - TTM1 constraint
  97  *     34-35: TTM1SEL value (0=IDU, 3=GRS) 0x0c_0000_0000
  98  *
  99  * UC - unit constraint: can't have all three of FPU|IFU|ISU1, ISU0, IDU|GRS
 100  *     33: UC3 error 0x02_0000_0000
 101  *     32: FPU|IFU|ISU1 events needed 0x01_0000_0000
 102  *     31: ISU0 events needed 0x01_8000_0000
 103  *     30: IDU|GRS events needed 0x00_4000_0000
 104  *
 105  * B0
 106  *     24-27: Byte 0 event source 0x0f00_0000
 107  *            Encoding as for the event code
 108  *
 109  * B1, B2, B3
 110  *     20-23, 16-19, 12-15: Byte 1, 2, 3 event sources
 111  *
 112  * P6
 113  *     11: P6 error 0x800
 114  *     10-11: Count of events needing PMC6
 115  *
 116  * P1..P5
 117  *     0-9: Count of events needing PMC1..PMC5
 118  */
 119
 120 static const int grsel_shift[8] = {
 121         MMCR1_GRS_L2SEL_SH, MMCR1_GRS_L2SEL_SH, MMCR1_GRS_L2SEL_SH,
 122         MMCR1_GRS_L3SEL_SH, MMCR1_GRS_L3SEL_SH, MMCR1_GRS_L3SEL_SH,
 123         MMCR1_GRS_MCSEL_SH, MMCR1_GRS_FABSEL_SH
 124 };
 125
 126 /* Masks and values for using events from the various units */
 127 static unsigned long unit_cons[PM_LASTUNIT+1][2] = {
 128         [PM_FPU] =   { 0x3200000000ul, 0x0100000000ul },
 129         [PM_ISU0] =  { 0x0200000000ul, 0x0080000000ul },
 130         [PM_ISU1] =  { 0x3200000000ul, 0x3100000000ul },
 131         [PM_IFU] =   { 0x3200000000ul, 0x2100000000ul },
 132         [PM_IDU] =   { 0x0e00000000ul, 0x0040000000ul },
 133         [PM_GRS] =   { 0x0e00000000ul, 0x0c40000000ul },
 134 };
 135
 136 static int power5p_get_constraint(u64 event, unsigned long *maskp,
 137                                   unsigned long *valp)
 138 {
 139         int pmc, byte, unit, sh;
 140         int bit, fmask;
 141         unsigned long mask = 0, value = 0;
 142
 143         pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
 144         if (pmc) {
 145                 if (pmc > 6)
 146                         return -1;
 147                 sh = (pmc - 1) * 2;
 148                 mask |= 2 << sh;
 149                 value |= 1 << sh;
 150                 if (pmc >= 5 && !(event == 0x500009 || event == 0x600005))
 151                         return -1;
 152         }
 153         if (event & PM_BUSEVENT_MSK) {
 154                 unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
 155                 if (unit > PM_LASTUNIT)
 156                         return -1;
 157                 if (unit == PM_ISU0_ALT)
 158                         unit = PM_ISU0;
 159                 mask |= unit_cons[unit][0];
 160                 value |= unit_cons[unit][1];
 161                 byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
 162                 if (byte >= 4) {
 163                         if (unit != PM_LSU1)
 164                                 return -1;
 165                         /* Map LSU1 low word (bytes 4-7) to unit LSU1+1 */
 166                         ++unit;
 167                         byte &= 3;
 168                 }
 169                 if (unit == PM_GRS) {
 170                         bit = event & 7;
 171                         fmask = (bit == 6)? 7: 3;
 172                         sh = grsel_shift[bit];
 173                         mask |= (unsigned long)fmask << sh;
 174                         value |= (unsigned long)((event >> PM_GRS_SH) & fmask)
 175                                 << sh;
 176                 }
 177                 /* Set byte lane select field */
 178                 mask  |= 0xfUL << (24 - 4 * byte);
 179                 value |= (unsigned long)unit << (24 - 4 * byte);
 180         }
 181         if (pmc < 5) {
 182                 /* need a counter from PMC1-4 set */
 183                 mask  |= 0x8000000000000ul;
 184                 value |= 0x1000000000000ul;
 185         }
 186         *maskp = mask;
 187         *valp = value;
 188         return 0;
 189 }
 190
 191 static int power5p_limited_pmc_event(u64 event)
 192 {
 193         int pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
 194
 195         return pmc == 5 || pmc == 6;
 196 }
 197
 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 */
 208         { 0x100005, 0x600005 },                 /* PM_RUN_CYC */
 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 s64 find_alternative_bdecode(u64 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
 276 static int power5p_get_alternatives(u64 event, unsigned int flags, u64 alt[])
 277 {
 278         int i, j, nalt = 1;
 279         int nlim;
 280         s64 ae;
 281
 282         alt[0] = event;
 283         nalt = 1;
 284         nlim = power5p_limited_pmc_event(event);
 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;
 291                         nlim += power5p_limited_pmc_event(ae);
 292                 }
 293         } else {
 294                 ae = find_alternative_bdecode(event);
 295                 if (ae > 0)
 296                         alt[nalt++] = ae;
 297         }
 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
 355         return nalt;
 356 }
 357
 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(u64 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
 454 static int power5p_compute_mmcr(u64 event[], int n_ev,
 455                                 unsigned int hwc[], unsigned long mmcr[])
 456 {
 457         unsigned long mmcr1 = 0;
 458         unsigned long mmcra = 0;
 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
 467         if (n_ev > 6)
 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) {
 476                         if (pmc > 6)
 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 |= (unsigned long)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 |= (unsigned long)(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 |= 1ul << (MMCR1_TTM3SEL_SH + 3 - byte);
 544                 }
 545                 ttm = unit >> 2;
 546                 mmcr1 |= (unsigned long)ttm
 547                         << (MMCR1_TD_CP_DBG0SEL_SH - 2 * byte);
 548         }
 549
 550         /* Second pass: assign PMCs, set PMCxSEL and PMCx_ADDER_SEL fields */
 551         for (i = 0; i < n_ev; ++i) {
 552                 pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
 553                 unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
 554                 byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
 555                 psel = event[i] & PM_PMCSEL_MSK;
 556                 isbus = event[i] & PM_BUSEVENT_MSK;
 557                 if (!pmc) {
 558                         /* Bus event or any-PMC direct event */
 559                         for (pmc = 0; pmc < 4; ++pmc) {
 560                                 if (!(pmc_inuse & (1 << pmc)))
 561                                         break;
 562                         }
 563                         if (pmc >= 4)
 564                                 return -1;
 565                         pmc_inuse |= 1 << pmc;
 566                 } else if (pmc <= 4) {
 567                         /* Direct event */
 568                         --pmc;
 569                         if (isbus && (byte & 2) &&
 570                             (psel == 8 || psel == 0x10 || psel == 0x28))
 571                                 /* add events on higher-numbered bus */
 572                                 mmcr1 |= 1ul << (MMCR1_PMC1_ADDER_SEL_SH - pmc);
 573                 } else {
 574                         /* Instructions or run cycles on PMC5/6 */
 575                         --pmc;
 576                 }
 577                 if (isbus && unit == PM_GRS) {
 578                         bit = psel & 7;
 579                         grsel = (event[i] >> PM_GRS_SH) & PM_GRS_MSK;
 580                         mmcr1 |= (unsigned long)grsel << grsel_shift[bit];
 581                 }
 582                 if (power5p_marked_instr_event(event[i]))
 583                         mmcra |= MMCRA_SAMPLE_ENABLE;
 584                 if ((psel & 0x58) == 0x40 && (byte & 1) != ((pmc >> 1) & 1))
 585                         /* select alternate byte lane */
 586                         psel |= 0x10;
 587                 if (pmc <= 3)
 588                         mmcr1 |= psel << MMCR1_PMCSEL_SH(pmc);
 589                 hwc[i] = pmc;
 590         }
 591
 592         /* Return MMCRx values */
 593         mmcr[0] = 0;
 594         if (pmc_inuse & 1)
 595                 mmcr[0] = MMCR0_PMC1CE;
 596         if (pmc_inuse & 0x3e)
 597                 mmcr[0] |= MMCR0_PMCjCE;
 598         mmcr[1] = mmcr1;
 599         mmcr[2] = mmcra;
 600         return 0;
 601 }
 602
 603 static void power5p_disable_pmc(unsigned int pmc, unsigned long mmcr[])
 604 {
 605         if (pmc <= 3)
 606                 mmcr[1] &= ~(0x7fUL << MMCR1_PMCSEL_SH(pmc));
 607 }
 608
 609 static int power5p_generic_events[] = {
 610         [PERF_COUNT_HW_CPU_CYCLES]              = 0xf,
 611         [PERF_COUNT_HW_INSTRUCTIONS]            = 0x100009,
 612         [PERF_COUNT_HW_CACHE_REFERENCES]        = 0x1c10a8, /* LD_REF_L1 */
 613         [PERF_COUNT_HW_CACHE_MISSES]            = 0x3c1088, /* LD_MISS_L1 */
 614         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS]     = 0x230e4,  /* BR_ISSUED */
 615         [PERF_COUNT_HW_BRANCH_MISSES]           = 0x230e5,  /* BR_MPRED_CR */
 616 };
 617
 618 #define C(x)    PERF_COUNT_HW_CACHE_##x
 619
 620 /*
 621  * Table of generalized cache-related events.
 622  * 0 means not supported, -1 means nonsensical, other values
 623  * are event codes.
 624  */
 625 static int power5p_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
 626         [C(L1D)] = {            /*      RESULT_ACCESS   RESULT_MISS */
 627                 [C(OP_READ)] = {        0x1c10a8,       0x3c1088        },
 628                 [C(OP_WRITE)] = {       0x2c10a8,       0xc10c3         },
 629                 [C(OP_PREFETCH)] = {    0xc70e7,        -1              },
 630         },
 631         [C(L1I)] = {            /*      RESULT_ACCESS   RESULT_MISS */
 632                 [C(OP_READ)] = {        0,              0               },
 633                 [C(OP_WRITE)] = {       -1,             -1              },
 634                 [C(OP_PREFETCH)] = {    0,              0               },
 635         },
 636         [C(LL)] = {             /*      RESULT_ACCESS   RESULT_MISS */
 637                 [C(OP_READ)] = {        0,              0               },
 638                 [C(OP_WRITE)] = {       0,              0               },
 639                 [C(OP_PREFETCH)] = {    0xc50c3,        0               },
 640         },
 641         [C(DTLB)] = {           /*      RESULT_ACCESS   RESULT_MISS */
 642                 [C(OP_READ)] = {        0xc20e4,        0x800c4         },
 643                 [C(OP_WRITE)] = {       -1,             -1              },
 644                 [C(OP_PREFETCH)] = {    -1,             -1              },
 645         },
 646         [C(ITLB)] = {           /*      RESULT_ACCESS   RESULT_MISS */
 647                 [C(OP_READ)] = {        0,              0x800c0         },
 648                 [C(OP_WRITE)] = {       -1,             -1              },
 649                 [C(OP_PREFETCH)] = {    -1,             -1              },
 650         },
 651         [C(BPU)] = {            /*      RESULT_ACCESS   RESULT_MISS */
 652                 [C(OP_READ)] = {        0x230e4,        0x230e5         },
 653                 [C(OP_WRITE)] = {       -1,             -1              },
 654                 [C(OP_PREFETCH)] = {    -1,             -1              },
 655         },
 656         [C(NODE)] = {           /*      RESULT_ACCESS   RESULT_MISS */
 657                 [C(OP_READ)] = {        -1,             -1              },
 658                 [C(OP_WRITE)] = {       -1,             -1              },
 659                 [C(OP_PREFETCH)] = {    -1,             -1              },
 660         },
 661 };
 662
 663 static struct power_pmu power5p_pmu = {
 664         .name                   = "POWER5+/++",
 665         .n_counter              = 6,
 666         .max_alternatives       = MAX_ALT,
 667         .add_fields             = 0x7000000000055ul,
 668         .test_adder             = 0x3000040000000ul,
 669         .compute_mmcr           = power5p_compute_mmcr,
 670         .get_constraint         = power5p_get_constraint,
 671         .get_alternatives       = power5p_get_alternatives,
 672         .disable_pmc            = power5p_disable_pmc,
 673         .limited_pmc_event      = power5p_limited_pmc_event,
 674         .flags                  = PPMU_LIMITED_PMC5_6,
 675         .n_generic              = ARRAY_SIZE(power5p_generic_events),
 676         .generic_events         = power5p_generic_events,
 677         .cache_events           = &power5p_cache_events,
 678 };
 679
 680 static int __init init_power5p_pmu(void)
 681 {
 682         if (!cur_cpu_spec->oprofile_cpu_type ||
 683             (strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power5+")
 684              && strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power5++")))
 685                 return -ENODEV;
 686
 687         return register_power_pmu(&power5p_pmu);
 688 }
 689
 690 early_initcall(init_power5p_pmu);