arch/powerpc/kernel/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 (not POWER5++)
  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  *         T0T1 NC G0G1G2 G3  UC PS1PS2 B0  B1  B2  B3 P6P5P4P3P2P1
  81  *
  82  * T0 - TTM0 constraint
  83  *     54-55: TTM0SEL value (0=FPU, 2=IFU, 3=ISU1) 0xc0_0000_0000_0000
  84  *
  85  * T1 - TTM1 constraint
  86  *     52-53: TTM1SEL value (0=IDU, 3=GRS) 0x30_0000_0000_0000
  87  *
  88  * NC - number of counters
  89  *     51: NC error 0x0008_0000_0000_0000
  90  *     48-50: number of events needing PMC1-4 0x0007_0000_0000_0000
  91  *
  92  * G0..G3 - GRS mux constraints
  93  *     46-47: GRS_L2SEL value
  94  *     44-45: GRS_L3SEL value
  95  *     41-44: GRS_MCSEL value
  96  *     39-40: GRS_FABSEL value
  97  *      Note that these match up with their bit positions in MMCR1
  98  *
  99  * UC - unit constraint: can't have all three of FPU|IFU|ISU1, ISU0, IDU|GRS
 100  *     37: UC3 error 0x20_0000_0000
 101  *     36: FPU|IFU|ISU1 events needed 0x10_0000_0000
 102  *     35: ISU0 events needed 0x08_0000_0000
 103  *     34: IDU|GRS events needed 0x04_0000_0000
 104  *
 105  * PS1
 106  *     33: PS1 error 0x2_0000_0000
 107  *     31-32: count of events needing PMC1/2 0x1_8000_0000
 108  *
 109  * PS2
 110  *     30: PS2 error 0x4000_0000
 111  *     28-29: count of events needing PMC3/4 0x3000_0000
 112  *
 113  * B0
 114  *     24-27: Byte 0 event source 0x0f00_0000
 115  *            Encoding as for the event code
 116  *
 117  * B1, B2, B3
 118  *     20-23, 16-19, 12-15: Byte 1, 2, 3 event sources
 119  *
 120  * P1..P6
 121  *     0-11: Count of events needing PMC1..PMC6
 122  */
 123
 124 static const int grsel_shift[8] = {
 125         MMCR1_GRS_L2SEL_SH, MMCR1_GRS_L2SEL_SH, MMCR1_GRS_L2SEL_SH,
 126         MMCR1_GRS_L3SEL_SH, MMCR1_GRS_L3SEL_SH, MMCR1_GRS_L3SEL_SH,
 127         MMCR1_GRS_MCSEL_SH, MMCR1_GRS_FABSEL_SH
 128 };
 129
 130 /* Masks and values for using events from the various units */
 131 static unsigned long unit_cons[PM_LASTUNIT+1][2] = {
 132         [PM_FPU] =   { 0xc0002000000000ul, 0x00001000000000ul },
 133         [PM_ISU0] =  { 0x00002000000000ul, 0x00000800000000ul },
 134         [PM_ISU1] =  { 0xc0002000000000ul, 0xc0001000000000ul },
 135         [PM_IFU] =   { 0xc0002000000000ul, 0x80001000000000ul },
 136         [PM_IDU] =   { 0x30002000000000ul, 0x00000400000000ul },
 137         [PM_GRS] =   { 0x30002000000000ul, 0x30000400000000ul },
 138 };
 139
 140 static int power5_get_constraint(u64 event, unsigned long *maskp,
 141                                  unsigned long *valp)
 142 {
 143         int pmc, byte, unit, sh;
 144         int bit, fmask;
 145         unsigned long mask = 0, value = 0;
 146         int grp = -1;
 147
 148         pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
 149         if (pmc) {
 150                 if (pmc > 6)
 151                         return -1;
 152                 sh = (pmc - 1) * 2;
 153                 mask |= 2 << sh;
 154                 value |= 1 << sh;
 155                 if (pmc <= 4)
 156                         grp = (pmc - 1) >> 1;
 157                 else if (event != 0x500009 && event != 0x600005)
 158                         return -1;
 159         }
 160         if (event & PM_BUSEVENT_MSK) {
 161                 unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
 162                 if (unit > PM_LASTUNIT)
 163                         return -1;
 164                 if (unit == PM_ISU0_ALT)
 165                         unit = PM_ISU0;
 166                 mask |= unit_cons[unit][0];
 167                 value |= unit_cons[unit][1];
 168                 byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
 169                 if (byte >= 4) {
 170                         if (unit != PM_LSU1)
 171                                 return -1;
 172                         /* Map LSU1 low word (bytes 4-7) to unit LSU1+1 */
 173                         ++unit;
 174                         byte &= 3;
 175                 }
 176                 if (unit == PM_GRS) {
 177                         bit = event & 7;
 178                         fmask = (bit == 6)? 7: 3;
 179                         sh = grsel_shift[bit];
 180                         mask |= (unsigned long)fmask << sh;
 181                         value |= (unsigned long)((event >> PM_GRS_SH) & fmask)
 182                                 << sh;
 183                 }
 184                 /*
 185                  * Bus events on bytes 0 and 2 can be counted
 186                  * on PMC1/2; bytes 1 and 3 on PMC3/4.
 187                  */
 188                 if (!pmc)
 189                         grp = byte & 1;
 190                 /* Set byte lane select field */
 191                 mask  |= 0xfUL << (24 - 4 * byte);
 192                 value |= (unsigned long)unit << (24 - 4 * byte);
 193         }
 194         if (grp == 0) {
 195                 /* increment PMC1/2 field */
 196                 mask  |= 0x200000000ul;
 197                 value |= 0x080000000ul;
 198         } else if (grp == 1) {
 199                 /* increment PMC3/4 field */
 200                 mask  |= 0x40000000ul;
 201                 value |= 0x10000000ul;
 202         }
 203         if (pmc < 5) {
 204                 /* need a counter from PMC1-4 set */
 205                 mask  |= 0x8000000000000ul;
 206                 value |= 0x1000000000000ul;
 207         }
 208         *maskp = mask;
 209         *valp = value;
 210         return 0;
 211 }
 212
 213 #define MAX_ALT 3       /* at most 3 alternatives for any event */
 214
 215 static const unsigned int event_alternatives[][MAX_ALT] = {
 216         { 0x120e4,  0x400002 },                 /* PM_GRP_DISP_REJECT */
 217         { 0x410c7,  0x441084 },                 /* PM_THRD_L2MISS_BOTH_CYC */
 218         { 0x100005, 0x600005 },                 /* PM_RUN_CYC */
 219         { 0x100009, 0x200009, 0x500009 },       /* PM_INST_CMPL */
 220         { 0x300009, 0x400009 },                 /* PM_INST_DISP */
 221 };
 222
 223 /*
 224  * Scan the alternatives table for a match and return the
 225  * index into the alternatives table if found, else -1.
 226  */
 227 static int find_alternative(u64 event)
 228 {
 229         int i, j;
 230
 231         for (i = 0; i < ARRAY_SIZE(event_alternatives); ++i) {
 232                 if (event < event_alternatives[i][0])
 233                         break;
 234                 for (j = 0; j < MAX_ALT && event_alternatives[i][j]; ++j)
 235                         if (event == event_alternatives[i][j])
 236                                 return i;
 237         }
 238         return -1;
 239 }
 240
 241 static const unsigned char bytedecode_alternatives[4][4] = {
 242         /* PMC 1 */     { 0x21, 0x23, 0x25, 0x27 },
 243         /* PMC 2 */     { 0x07, 0x17, 0x0e, 0x1e },
 244         /* PMC 3 */     { 0x20, 0x22, 0x24, 0x26 },
 245         /* PMC 4 */     { 0x07, 0x17, 0x0e, 0x1e }
 246 };
 247
 248 /*
 249  * Some direct events for decodes of event bus byte 3 have alternative
 250  * PMCSEL values on other counters.  This returns the alternative
 251  * event code for those that do, or -1 otherwise.
 252  */
 253 static s64 find_alternative_bdecode(u64 event)
 254 {
 255         int pmc, altpmc, pp, j;
 256
 257         pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
 258         if (pmc == 0 || pmc > 4)
 259                 return -1;
 260         altpmc = 5 - pmc;       /* 1 <-> 4, 2 <-> 3 */
 261         pp = event & PM_PMCSEL_MSK;
 262         for (j = 0; j < 4; ++j) {
 263                 if (bytedecode_alternatives[pmc - 1][j] == pp) {
 264                         return (event & ~(PM_PMC_MSKS | PM_PMCSEL_MSK)) |
 265                                 (altpmc << PM_PMC_SH) |
 266                                 bytedecode_alternatives[altpmc - 1][j];
 267                 }
 268         }
 269         return -1;
 270 }
 271
 272 static int power5_get_alternatives(u64 event, unsigned int flags, u64 alt[])
 273 {
 274         int i, j, nalt = 1;
 275         s64 ae;
 276
 277         alt[0] = event;
 278         nalt = 1;
 279         i = find_alternative(event);
 280         if (i >= 0) {
 281                 for (j = 0; j < MAX_ALT; ++j) {
 282                         ae = event_alternatives[i][j];
 283                         if (ae && ae != event)
 284                                 alt[nalt++] = ae;
 285                 }
 286         } else {
 287                 ae = find_alternative_bdecode(event);
 288                 if (ae > 0)
 289                         alt[nalt++] = ae;
 290         }
 291         return nalt;
 292 }
 293
 294 /*
 295  * Map of which direct events on which PMCs are marked instruction events.
 296  * Indexed by PMCSEL value, bit i (LE) set if PMC i is a marked event.
 297  * Bit 0 is set if it is marked for all PMCs.
 298  * The 0x80 bit indicates a byte decode PMCSEL value.
 299  */
 300 static unsigned char direct_event_is_marked[0x28] = {
 301         0,      /* 00 */
 302         0x1f,   /* 01 PM_IOPS_CMPL */
 303         0x2,    /* 02 PM_MRK_GRP_DISP */
 304         0xe,    /* 03 PM_MRK_ST_CMPL, PM_MRK_ST_GPS, PM_MRK_ST_CMPL_INT */
 305         0,      /* 04 */
 306         0x1c,   /* 05 PM_MRK_BRU_FIN, PM_MRK_INST_FIN, PM_MRK_CRU_FIN */
 307         0x80,   /* 06 */
 308         0x80,   /* 07 */
 309         0, 0, 0,/* 08 - 0a */
 310         0x18,   /* 0b PM_THRESH_TIMEO, PM_MRK_GRP_TIMEO */
 311         0,      /* 0c */
 312         0x80,   /* 0d */
 313         0x80,   /* 0e */
 314         0,      /* 0f */
 315         0,      /* 10 */
 316         0x14,   /* 11 PM_MRK_GRP_BR_REDIR, PM_MRK_GRP_IC_MISS */
 317         0,      /* 12 */
 318         0x10,   /* 13 PM_MRK_GRP_CMPL */
 319         0x1f,   /* 14 PM_GRP_MRK, PM_MRK_{FXU,FPU,LSU}_FIN */
 320         0x2,    /* 15 PM_MRK_GRP_ISSUED */
 321         0x80,   /* 16 */
 322         0x80,   /* 17 */
 323         0, 0, 0, 0, 0,
 324         0x80,   /* 1d */
 325         0x80,   /* 1e */
 326         0,      /* 1f */
 327         0x80,   /* 20 */
 328         0x80,   /* 21 */
 329         0x80,   /* 22 */
 330         0x80,   /* 23 */
 331         0x80,   /* 24 */
 332         0x80,   /* 25 */
 333         0x80,   /* 26 */
 334         0x80,   /* 27 */
 335 };
 336
 337 /*
 338  * Returns 1 if event counts things relating to marked instructions
 339  * and thus needs the MMCRA_SAMPLE_ENABLE bit set, or 0 if not.
 340  */
 341 static int power5_marked_instr_event(u64 event)
 342 {
 343         int pmc, psel;
 344         int bit, byte, unit;
 345         u32 mask;
 346
 347         pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
 348         psel = event & PM_PMCSEL_MSK;
 349         if (pmc >= 5)
 350                 return 0;
 351
 352         bit = -1;
 353         if (psel < sizeof(direct_event_is_marked)) {
 354                 if (direct_event_is_marked[psel] & (1 << pmc))
 355                         return 1;
 356                 if (direct_event_is_marked[psel] & 0x80)
 357                         bit = 4;
 358                 else if (psel == 0x08)
 359                         bit = pmc - 1;
 360                 else if (psel == 0x10)
 361                         bit = 4 - pmc;
 362                 else if (psel == 0x1b && (pmc == 1 || pmc == 3))
 363                         bit = 4;
 364         } else if ((psel & 0x58) == 0x40)
 365                 bit = psel & 7;
 366
 367         if (!(event & PM_BUSEVENT_MSK))
 368                 return 0;
 369
 370         byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
 371         unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
 372         if (unit == PM_LSU0) {
 373                 /* byte 1 bits 0-7, byte 2 bits 0,2-4,6 */
 374                 mask = 0x5dff00;
 375         } else if (unit == PM_LSU1 && byte >= 4) {
 376                 byte -= 4;
 377                 /* byte 4 bits 1,3,5,7, byte 5 bits 6-7, byte 7 bits 0-4,6 */
 378                 mask = 0x5f00c0aa;
 379         } else
 380                 return 0;
 381
 382         return (mask >> (byte * 8 + bit)) & 1;
 383 }
 384
 385 static int power5_compute_mmcr(u64 event[], int n_ev,
 386                                unsigned int hwc[], unsigned long mmcr[])
 387 {
 388         unsigned long mmcr1 = 0;
 389         unsigned long mmcra = MMCRA_SDAR_DCACHE_MISS | MMCRA_SDAR_ERAT_MISS;
 390         unsigned int pmc, unit, byte, psel;
 391         unsigned int ttm, grp;
 392         int i, isbus, bit, grsel;
 393         unsigned int pmc_inuse = 0;
 394         unsigned int pmc_grp_use[2];
 395         unsigned char busbyte[4];
 396         unsigned char unituse[16];
 397         int ttmuse;
 398
 399         if (n_ev > 6)
 400                 return -1;
 401
 402         /* First pass to count resource use */
 403         pmc_grp_use[0] = pmc_grp_use[1] = 0;
 404         memset(busbyte, 0, sizeof(busbyte));
 405         memset(unituse, 0, sizeof(unituse));
 406         for (i = 0; i < n_ev; ++i) {
 407                 pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
 408                 if (pmc) {
 409                         if (pmc > 6)
 410                                 return -1;
 411                         if (pmc_inuse & (1 << (pmc - 1)))
 412                                 return -1;
 413                         pmc_inuse |= 1 << (pmc - 1);
 414                         /* count 1/2 vs 3/4 use */
 415                         if (pmc <= 4)
 416                                 ++pmc_grp_use[(pmc - 1) >> 1];
 417                 }
 418                 if (event[i] & PM_BUSEVENT_MSK) {
 419                         unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
 420                         byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
 421                         if (unit > PM_LASTUNIT)
 422                                 return -1;
 423                         if (unit == PM_ISU0_ALT)
 424                                 unit = PM_ISU0;
 425                         if (byte >= 4) {
 426                                 if (unit != PM_LSU1)
 427                                         return -1;
 428                                 ++unit;
 429                                 byte &= 3;
 430                         }
 431                         if (!pmc)
 432                                 ++pmc_grp_use[byte & 1];
 433                         if (busbyte[byte] && busbyte[byte] != unit)
 434                                 return -1;
 435                         busbyte[byte] = unit;
 436                         unituse[unit] = 1;
 437                 }
 438         }
 439         if (pmc_grp_use[0] > 2 || pmc_grp_use[1] > 2)
 440                 return -1;
 441
 442         /*
 443          * Assign resources and set multiplexer selects.
 444          *
 445          * PM_ISU0 can go either on TTM0 or TTM1, but that's the only
 446          * choice we have to deal with.
 447          */
 448         if (unituse[PM_ISU0] &
 449             (unituse[PM_FPU] | unituse[PM_IFU] | unituse[PM_ISU1])) {
 450                 unituse[PM_ISU0_ALT] = 1;       /* move ISU to TTM1 */
 451                 unituse[PM_ISU0] = 0;
 452         }
 453         /* Set TTM[01]SEL fields. */
 454         ttmuse = 0;
 455         for (i = PM_FPU; i <= PM_ISU1; ++i) {
 456                 if (!unituse[i])
 457                         continue;
 458                 if (ttmuse++)
 459                         return -1;
 460                 mmcr1 |= (unsigned long)i << MMCR1_TTM0SEL_SH;
 461         }
 462         ttmuse = 0;
 463         for (; i <= PM_GRS; ++i) {
 464                 if (!unituse[i])
 465                         continue;
 466                 if (ttmuse++)
 467                         return -1;
 468                 mmcr1 |= (unsigned long)(i & 3) << MMCR1_TTM1SEL_SH;
 469         }
 470         if (ttmuse > 1)
 471                 return -1;
 472
 473         /* Set byte lane select fields, TTM[23]SEL and GRS_*SEL. */
 474         for (byte = 0; byte < 4; ++byte) {
 475                 unit = busbyte[byte];
 476                 if (!unit)
 477                         continue;
 478                 if (unit == PM_ISU0 && unituse[PM_ISU0_ALT]) {
 479                         /* get ISU0 through TTM1 rather than TTM0 */
 480                         unit = PM_ISU0_ALT;
 481                 } else if (unit == PM_LSU1 + 1) {
 482                         /* select lower word of LSU1 for this byte */
 483                         mmcr1 |= 1ul << (MMCR1_TTM3SEL_SH + 3 - byte);
 484                 }
 485                 ttm = unit >> 2;
 486                 mmcr1 |= (unsigned long)ttm
 487                         << (MMCR1_TD_CP_DBG0SEL_SH - 2 * byte);
 488         }
 489
 490         /* Second pass: assign PMCs, set PMCxSEL and PMCx_ADDER_SEL fields */
 491         for (i = 0; i < n_ev; ++i) {
 492                 pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
 493                 unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
 494                 byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
 495                 psel = event[i] & PM_PMCSEL_MSK;
 496                 isbus = event[i] & PM_BUSEVENT_MSK;
 497                 if (!pmc) {
 498                         /* Bus event or any-PMC direct event */
 499                         for (pmc = 0; pmc < 4; ++pmc) {
 500                                 if (pmc_inuse & (1 << pmc))
 501                                         continue;
 502                                 grp = (pmc >> 1) & 1;
 503                                 if (isbus) {
 504                                         if (grp == (byte & 1))
 505                                                 break;
 506                                 } else if (pmc_grp_use[grp] < 2) {
 507                                         ++pmc_grp_use[grp];
 508                                         break;
 509                                 }
 510                         }
 511                         pmc_inuse |= 1 << pmc;
 512                 } else if (pmc <= 4) {
 513                         /* Direct event */
 514                         --pmc;
 515                         if ((psel == 8 || psel == 0x10) && isbus && (byte & 2))
 516                                 /* add events on higher-numbered bus */
 517                                 mmcr1 |= 1ul << (MMCR1_PMC1_ADDER_SEL_SH - pmc);
 518                 } else {
 519                         /* Instructions or run cycles on PMC5/6 */
 520                         --pmc;
 521                 }
 522                 if (isbus && unit == PM_GRS) {
 523                         bit = psel & 7;
 524                         grsel = (event[i] >> PM_GRS_SH) & PM_GRS_MSK;
 525                         mmcr1 |= (unsigned long)grsel << grsel_shift[bit];
 526                 }
 527                 if (power5_marked_instr_event(event[i]))
 528                         mmcra |= MMCRA_SAMPLE_ENABLE;
 529                 if (pmc <= 3)
 530                         mmcr1 |= psel << MMCR1_PMCSEL_SH(pmc);
 531                 hwc[i] = pmc;
 532         }
 533
 534         /* Return MMCRx values */
 535         mmcr[0] = 0;
 536         if (pmc_inuse & 1)
 537                 mmcr[0] = MMCR0_PMC1CE;
 538         if (pmc_inuse & 0x3e)
 539                 mmcr[0] |= MMCR0_PMCjCE;
 540         mmcr[1] = mmcr1;
 541         mmcr[2] = mmcra;
 542         return 0;
 543 }
 544
 545 static void power5_disable_pmc(unsigned int pmc, unsigned long mmcr[])
 546 {
 547         if (pmc <= 3)
 548                 mmcr[1] &= ~(0x7fUL << MMCR1_PMCSEL_SH(pmc));
 549 }
 550
 551 static int power5_generic_events[] = {
 552         [PERF_COUNT_HW_CPU_CYCLES]              = 0xf,
 553         [PERF_COUNT_HW_INSTRUCTIONS]            = 0x100009,
 554         [PERF_COUNT_HW_CACHE_REFERENCES]        = 0x4c1090, /* LD_REF_L1 */
 555         [PERF_COUNT_HW_CACHE_MISSES]            = 0x3c1088, /* LD_MISS_L1 */
 556         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS]     = 0x230e4,  /* BR_ISSUED */
 557         [PERF_COUNT_HW_BRANCH_MISSES]           = 0x230e5,  /* BR_MPRED_CR */
 558 };
 559
 560 #define C(x)    PERF_COUNT_HW_CACHE_##x
 561
 562 /*
 563  * Table of generalized cache-related events.
 564  * 0 means not supported, -1 means nonsensical, other values
 565  * are event codes.
 566  */
 567 static int power5_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
 568         [C(L1D)] = {            /*      RESULT_ACCESS   RESULT_MISS */
 569                 [C(OP_READ)] = {        0x4c1090,       0x3c1088        },
 570                 [C(OP_WRITE)] = {       0x3c1090,       0xc10c3         },
 571                 [C(OP_PREFETCH)] = {    0xc70e7,        0               },
 572         },
 573         [C(L1I)] = {            /*      RESULT_ACCESS   RESULT_MISS */
 574                 [C(OP_READ)] = {        0,              0               },
 575                 [C(OP_WRITE)] = {       -1,             -1              },
 576                 [C(OP_PREFETCH)] = {    0,              0               },
 577         },
 578         [C(LL)] = {             /*      RESULT_ACCESS   RESULT_MISS */
 579                 [C(OP_READ)] = {        0,              0x3c309b        },
 580                 [C(OP_WRITE)] = {       0,              0               },
 581                 [C(OP_PREFETCH)] = {    0xc50c3,        0               },
 582         },
 583         [C(DTLB)] = {           /*      RESULT_ACCESS   RESULT_MISS */
 584                 [C(OP_READ)] = {        0x2c4090,       0x800c4         },
 585                 [C(OP_WRITE)] = {       -1,             -1              },
 586                 [C(OP_PREFETCH)] = {    -1,             -1              },
 587         },
 588         [C(ITLB)] = {           /*      RESULT_ACCESS   RESULT_MISS */
 589                 [C(OP_READ)] = {        0,              0x800c0         },
 590                 [C(OP_WRITE)] = {       -1,             -1              },
 591                 [C(OP_PREFETCH)] = {    -1,             -1              },
 592         },
 593         [C(BPU)] = {            /*      RESULT_ACCESS   RESULT_MISS */
 594                 [C(OP_READ)] = {        0x230e4,        0x230e5         },
 595                 [C(OP_WRITE)] = {       -1,             -1              },
 596                 [C(OP_PREFETCH)] = {    -1,             -1              },
 597         },
 598         [C(NODE)] = {           /*      RESULT_ACCESS   RESULT_MISS */
 599                 [C(OP_READ)] = {        -1,             -1              },
 600                 [C(OP_WRITE)] = {       -1,             -1              },
 601                 [C(OP_PREFETCH)] = {    -1,             -1              },
 602         },
 603 };
 604
 605 static struct power_pmu power5_pmu = {
 606         .name                   = "POWER5",
 607         .n_counter              = 6,
 608         .max_alternatives       = MAX_ALT,
 609         .add_fields             = 0x7000090000555ul,
 610         .test_adder             = 0x3000490000000ul,
 611         .compute_mmcr           = power5_compute_mmcr,
 612         .get_constraint         = power5_get_constraint,
 613         .get_alternatives       = power5_get_alternatives,
 614         .disable_pmc            = power5_disable_pmc,
 615         .n_generic              = ARRAY_SIZE(power5_generic_events),
 616         .generic_events         = power5_generic_events,
 617         .cache_events           = &power5_cache_events,
 618 };
 619
 620 static int __init init_power5_pmu(void)
 621 {
 622         if (!cur_cpu_spec->oprofile_cpu_type ||
 623             strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power5"))
 624                 return -ENODEV;
 625
 626         return register_power_pmu(&power5_pmu);
 627 }
 628
 629 early_initcall(init_power5_pmu);