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

DEFINITIONS

1. power5_get_constraint
2. find_alternative
3. find_alternative_bdecode
4. power5_get_alternatives
5. power5_marked_instr_event
6. power5_compute_mmcr
7. power5_disable_pmc
8. init_power5_pmu

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Performance counter support for POWER5 (not POWER5++) processors.
   4  *
   5  * Copyright 2009 Paul Mackerras, IBM Corporation.
   6  */
   7 #include <linux/kernel.h>
   8 #include <linux/perf_event.h>
   9 #include <linux/string.h>
  10 #include <asm/reg.h>
  11 #include <asm/cputable.h>
  12 
  13 /*
  14  * Bits in event code for POWER5 (not POWER5++)
  15  */
  16 #define PM_PMC_SH       20      /* PMC number (1-based) for direct events */
  17 #define PM_PMC_MSK      0xf
  18 #define PM_PMC_MSKS     (PM_PMC_MSK << PM_PMC_SH)
  19 #define PM_UNIT_SH      16      /* TTMMUX number and setting - unit select */
  20 #define PM_UNIT_MSK     0xf
  21 #define PM_BYTE_SH      12      /* Byte number of event bus to use */
  22 #define PM_BYTE_MSK     7
  23 #define PM_GRS_SH       8       /* Storage subsystem mux select */
  24 #define PM_GRS_MSK      7
  25 #define PM_BUSEVENT_MSK 0x80    /* Set if event uses event bus */
  26 #define PM_PMCSEL_MSK   0x7f
  27 
  28 /* Values in PM_UNIT field */
  29 #define PM_FPU          0
  30 #define PM_ISU0         1
  31 #define PM_IFU          2
  32 #define PM_ISU1         3
  33 #define PM_IDU          4
  34 #define PM_ISU0_ALT     6
  35 #define PM_GRS          7
  36 #define PM_LSU0         8
  37 #define PM_LSU1         0xc
  38 #define PM_LASTUNIT     0xc
  39 
  40 /*
  41  * Bits in MMCR1 for POWER5
  42  */
  43 #define MMCR1_TTM0SEL_SH        62
  44 #define MMCR1_TTM1SEL_SH        60
  45 #define MMCR1_TTM2SEL_SH        58
  46 #define MMCR1_TTM3SEL_SH        56
  47 #define MMCR1_TTMSEL_MSK        3
  48 #define MMCR1_TD_CP_DBG0SEL_SH  54
  49 #define MMCR1_TD_CP_DBG1SEL_SH  52
  50 #define MMCR1_TD_CP_DBG2SEL_SH  50
  51 #define MMCR1_TD_CP_DBG3SEL_SH  48
  52 #define MMCR1_GRS_L2SEL_SH      46
  53 #define MMCR1_GRS_L2SEL_MSK     3
  54 #define MMCR1_GRS_L3SEL_SH      44
  55 #define MMCR1_GRS_L3SEL_MSK     3
  56 #define MMCR1_GRS_MCSEL_SH      41
  57 #define MMCR1_GRS_MCSEL_MSK     7
  58 #define MMCR1_GRS_FABSEL_SH     39
  59 #define MMCR1_GRS_FABSEL_MSK    3
  60 #define MMCR1_PMC1_ADDER_SEL_SH 35
  61 #define MMCR1_PMC2_ADDER_SEL_SH 34
  62 #define MMCR1_PMC3_ADDER_SEL_SH 33
  63 #define MMCR1_PMC4_ADDER_SEL_SH 32
  64 #define MMCR1_PMC1SEL_SH        25
  65 #define MMCR1_PMC2SEL_SH        17
  66 #define MMCR1_PMC3SEL_SH        9
  67 #define MMCR1_PMC4SEL_SH        1
  68 #define MMCR1_PMCSEL_SH(n)      (MMCR1_PMC1SEL_SH - (n) * 8)
  69 #define MMCR1_PMCSEL_MSK        0x7f
  70 
  71 /*
  72  * Layout of constraint bits:
  73  * 6666555555555544444444443333333333222222222211111111110000000000
  74  * 3210987654321098765432109876543210987654321098765432109876543210
  75  *         <><>[  ><><>< ><> [  >[ >[ ><  ><  ><  ><  ><><><><><><>
  76  *         T0T1 NC G0G1G2 G3  UC PS1PS2 B0  B1  B2  B3 P6P5P4P3P2P1
  77  *
  78  * T0 - TTM0 constraint
  79  *     54-55: TTM0SEL value (0=FPU, 2=IFU, 3=ISU1) 0xc0_0000_0000_0000
  80  *
  81  * T1 - TTM1 constraint
  82  *     52-53: TTM1SEL value (0=IDU, 3=GRS) 0x30_0000_0000_0000
  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  * UC - unit constraint: can't have all three of FPU|IFU|ISU1, ISU0, IDU|GRS
  96  *     37: UC3 error 0x20_0000_0000
  97  *     36: FPU|IFU|ISU1 events needed 0x10_0000_0000
  98  *     35: ISU0 events needed 0x08_0000_0000
  99  *     34: IDU|GRS events needed 0x04_0000_0000
 100  *
 101  * PS1
 102  *     33: PS1 error 0x2_0000_0000
 103  *     31-32: count of events needing PMC1/2 0x1_8000_0000
 104  *
 105  * PS2
 106  *     30: PS2 error 0x4000_0000
 107  *     28-29: count of events needing PMC3/4 0x3000_0000
 108  *
 109  * B0
 110  *     24-27: Byte 0 event source 0x0f00_0000
 111  *            Encoding as for the event code
 112  *
 113  * B1, B2, B3
 114  *     20-23, 16-19, 12-15: Byte 1, 2, 3 event sources
 115  *
 116  * P1..P6
 117  *     0-11: Count of events needing PMC1..PMC6
 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] =   { 0xc0002000000000ul, 0x00001000000000ul },
 129         [PM_ISU0] =  { 0x00002000000000ul, 0x00000800000000ul },
 130         [PM_ISU1] =  { 0xc0002000000000ul, 0xc0001000000000ul },
 131         [PM_IFU] =   { 0xc0002000000000ul, 0x80001000000000ul },
 132         [PM_IDU] =   { 0x30002000000000ul, 0x00000400000000ul },
 133         [PM_GRS] =   { 0x30002000000000ul, 0x30000400000000ul },
 134 };
 135 
 136 static int power5_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         int grp = -1;
 143 
 144         pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
 145         if (pmc) {
 146                 if (pmc > 6)
 147                         return -1;
 148                 sh = (pmc - 1) * 2;
 149                 mask |= 2 << sh;
 150                 value |= 1 << sh;
 151                 if (pmc <= 4)
 152                         grp = (pmc - 1) >> 1;
 153                 else if (event != 0x500009 && event != 0x600005)
 154                         return -1;
 155         }
 156         if (event & PM_BUSEVENT_MSK) {
 157                 unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
 158                 if (unit > PM_LASTUNIT)
 159                         return -1;
 160                 if (unit == PM_ISU0_ALT)
 161                         unit = PM_ISU0;
 162                 mask |= unit_cons[unit][0];
 163                 value |= unit_cons[unit][1];
 164                 byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
 165                 if (byte >= 4) {
 166                         if (unit != PM_LSU1)
 167                                 return -1;
 168                         /* Map LSU1 low word (bytes 4-7) to unit LSU1+1 */
 169                         ++unit;
 170                         byte &= 3;
 171                 }
 172                 if (unit == PM_GRS) {
 173                         bit = event & 7;
 174                         fmask = (bit == 6)? 7: 3;
 175                         sh = grsel_shift[bit];
 176                         mask |= (unsigned long)fmask << sh;
 177                         value |= (unsigned long)((event >> PM_GRS_SH) & fmask)
 178                                 << sh;
 179                 }
 180                 /*
 181                  * Bus events on bytes 0 and 2 can be counted
 182                  * on PMC1/2; bytes 1 and 3 on PMC3/4.
 183                  */
 184                 if (!pmc)
 185                         grp = byte & 1;
 186                 /* Set byte lane select field */
 187                 mask  |= 0xfUL << (24 - 4 * byte);
 188                 value |= (unsigned long)unit << (24 - 4 * byte);
 189         }
 190         if (grp == 0) {
 191                 /* increment PMC1/2 field */
 192                 mask  |= 0x200000000ul;
 193                 value |= 0x080000000ul;
 194         } else if (grp == 1) {
 195                 /* increment PMC3/4 field */
 196                 mask  |= 0x40000000ul;
 197                 value |= 0x10000000ul;
 198         }
 199         if (pmc < 5) {
 200                 /* need a counter from PMC1-4 set */
 201                 mask  |= 0x8000000000000ul;
 202                 value |= 0x1000000000000ul;
 203         }
 204         *maskp = mask;
 205         *valp = value;
 206         return 0;
 207 }
 208 
 209 #define MAX_ALT 3       /* at most 3 alternatives for any event */
 210 
 211 static const unsigned int event_alternatives[][MAX_ALT] = {
 212         { 0x120e4,  0x400002 },                 /* PM_GRP_DISP_REJECT */
 213         { 0x410c7,  0x441084 },                 /* PM_THRD_L2MISS_BOTH_CYC */
 214         { 0x100005, 0x600005 },                 /* PM_RUN_CYC */
 215         { 0x100009, 0x200009, 0x500009 },       /* PM_INST_CMPL */
 216         { 0x300009, 0x400009 },                 /* PM_INST_DISP */
 217 };
 218 
 219 /*
 220  * Scan the alternatives table for a match and return the
 221  * index into the alternatives table if found, else -1.
 222  */
 223 static int find_alternative(u64 event)
 224 {
 225         int i, j;
 226 
 227         for (i = 0; i < ARRAY_SIZE(event_alternatives); ++i) {
 228                 if (event < event_alternatives[i][0])
 229                         break;
 230                 for (j = 0; j < MAX_ALT && event_alternatives[i][j]; ++j)
 231                         if (event == event_alternatives[i][j])
 232                                 return i;
 233         }
 234         return -1;
 235 }
 236 
 237 static const unsigned char bytedecode_alternatives[4][4] = {
 238         /* PMC 1 */     { 0x21, 0x23, 0x25, 0x27 },
 239         /* PMC 2 */     { 0x07, 0x17, 0x0e, 0x1e },
 240         /* PMC 3 */     { 0x20, 0x22, 0x24, 0x26 },
 241         /* PMC 4 */     { 0x07, 0x17, 0x0e, 0x1e }
 242 };
 243 
 244 /*
 245  * Some direct events for decodes of event bus byte 3 have alternative
 246  * PMCSEL values on other counters.  This returns the alternative
 247  * event code for those that do, or -1 otherwise.
 248  */
 249 static s64 find_alternative_bdecode(u64 event)
 250 {
 251         int pmc, altpmc, pp, j;
 252 
 253         pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
 254         if (pmc == 0 || pmc > 4)
 255                 return -1;
 256         altpmc = 5 - pmc;       /* 1 <-> 4, 2 <-> 3 */
 257         pp = event & PM_PMCSEL_MSK;
 258         for (j = 0; j < 4; ++j) {
 259                 if (bytedecode_alternatives[pmc - 1][j] == pp) {
 260                         return (event & ~(PM_PMC_MSKS | PM_PMCSEL_MSK)) |
 261                                 (altpmc << PM_PMC_SH) |
 262                                 bytedecode_alternatives[altpmc - 1][j];
 263                 }
 264         }
 265         return -1;
 266 }
 267 
 268 static int power5_get_alternatives(u64 event, unsigned int flags, u64 alt[])
 269 {
 270         int i, j, nalt = 1;
 271         s64 ae;
 272 
 273         alt[0] = event;
 274         nalt = 1;
 275         i = find_alternative(event);
 276         if (i >= 0) {
 277                 for (j = 0; j < MAX_ALT; ++j) {
 278                         ae = event_alternatives[i][j];
 279                         if (ae && ae != event)
 280                                 alt[nalt++] = ae;
 281                 }
 282         } else {
 283                 ae = find_alternative_bdecode(event);
 284                 if (ae > 0)
 285                         alt[nalt++] = ae;
 286         }
 287         return nalt;
 288 }
 289 
 290 /*
 291  * Map of which direct events on which PMCs are marked instruction events.
 292  * Indexed by PMCSEL value, bit i (LE) set if PMC i is a marked event.
 293  * Bit 0 is set if it is marked for all PMCs.
 294  * The 0x80 bit indicates a byte decode PMCSEL value.
 295  */
 296 static unsigned char direct_event_is_marked[0x28] = {
 297         0,      /* 00 */
 298         0x1f,   /* 01 PM_IOPS_CMPL */
 299         0x2,    /* 02 PM_MRK_GRP_DISP */
 300         0xe,    /* 03 PM_MRK_ST_CMPL, PM_MRK_ST_GPS, PM_MRK_ST_CMPL_INT */
 301         0,      /* 04 */
 302         0x1c,   /* 05 PM_MRK_BRU_FIN, PM_MRK_INST_FIN, PM_MRK_CRU_FIN */
 303         0x80,   /* 06 */
 304         0x80,   /* 07 */
 305         0, 0, 0,/* 08 - 0a */
 306         0x18,   /* 0b PM_THRESH_TIMEO, PM_MRK_GRP_TIMEO */
 307         0,      /* 0c */
 308         0x80,   /* 0d */
 309         0x80,   /* 0e */
 310         0,      /* 0f */
 311         0,      /* 10 */
 312         0x14,   /* 11 PM_MRK_GRP_BR_REDIR, PM_MRK_GRP_IC_MISS */
 313         0,      /* 12 */
 314         0x10,   /* 13 PM_MRK_GRP_CMPL */
 315         0x1f,   /* 14 PM_GRP_MRK, PM_MRK_{FXU,FPU,LSU}_FIN */
 316         0x2,    /* 15 PM_MRK_GRP_ISSUED */
 317         0x80,   /* 16 */
 318         0x80,   /* 17 */
 319         0, 0, 0, 0, 0,
 320         0x80,   /* 1d */
 321         0x80,   /* 1e */
 322         0,      /* 1f */
 323         0x80,   /* 20 */
 324         0x80,   /* 21 */
 325         0x80,   /* 22 */
 326         0x80,   /* 23 */
 327         0x80,   /* 24 */
 328         0x80,   /* 25 */
 329         0x80,   /* 26 */
 330         0x80,   /* 27 */
 331 };
 332 
 333 /*
 334  * Returns 1 if event counts things relating to marked instructions
 335  * and thus needs the MMCRA_SAMPLE_ENABLE bit set, or 0 if not.
 336  */
 337 static int power5_marked_instr_event(u64 event)
 338 {
 339         int pmc, psel;
 340         int bit, byte, unit;
 341         u32 mask;
 342 
 343         pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
 344         psel = event & PM_PMCSEL_MSK;
 345         if (pmc >= 5)
 346                 return 0;
 347 
 348         bit = -1;
 349         if (psel < sizeof(direct_event_is_marked)) {
 350                 if (direct_event_is_marked[psel] & (1 << pmc))
 351                         return 1;
 352                 if (direct_event_is_marked[psel] & 0x80)
 353                         bit = 4;
 354                 else if (psel == 0x08)
 355                         bit = pmc - 1;
 356                 else if (psel == 0x10)
 357                         bit = 4 - pmc;
 358                 else if (psel == 0x1b && (pmc == 1 || pmc == 3))
 359                         bit = 4;
 360         } else if ((psel & 0x58) == 0x40)
 361                 bit = psel & 7;
 362 
 363         if (!(event & PM_BUSEVENT_MSK))
 364                 return 0;
 365 
 366         byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
 367         unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
 368         if (unit == PM_LSU0) {
 369                 /* byte 1 bits 0-7, byte 2 bits 0,2-4,6 */
 370                 mask = 0x5dff00;
 371         } else if (unit == PM_LSU1 && byte >= 4) {
 372                 byte -= 4;
 373                 /* byte 4 bits 1,3,5,7, byte 5 bits 6-7, byte 7 bits 0-4,6 */
 374                 mask = 0x5f00c0aa;
 375         } else
 376                 return 0;
 377 
 378         return (mask >> (byte * 8 + bit)) & 1;
 379 }
 380 
 381 static int power5_compute_mmcr(u64 event[], int n_ev,
 382                                unsigned int hwc[], unsigned long mmcr[], struct perf_event *pevents[])
 383 {
 384         unsigned long mmcr1 = 0;
 385         unsigned long mmcra = MMCRA_SDAR_DCACHE_MISS | MMCRA_SDAR_ERAT_MISS;
 386         unsigned int pmc, unit, byte, psel;
 387         unsigned int ttm, grp;
 388         int i, isbus, bit, grsel;
 389         unsigned int pmc_inuse = 0;
 390         unsigned int pmc_grp_use[2];
 391         unsigned char busbyte[4];
 392         unsigned char unituse[16];
 393         int ttmuse;
 394 
 395         if (n_ev > 6)
 396                 return -1;
 397 
 398         /* First pass to count resource use */
 399         pmc_grp_use[0] = pmc_grp_use[1] = 0;
 400         memset(busbyte, 0, sizeof(busbyte));
 401         memset(unituse, 0, sizeof(unituse));
 402         for (i = 0; i < n_ev; ++i) {
 403                 pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
 404                 if (pmc) {
 405                         if (pmc > 6)
 406                                 return -1;
 407                         if (pmc_inuse & (1 << (pmc - 1)))
 408                                 return -1;
 409                         pmc_inuse |= 1 << (pmc - 1);
 410                         /* count 1/2 vs 3/4 use */
 411                         if (pmc <= 4)
 412                                 ++pmc_grp_use[(pmc - 1) >> 1];
 413                 }
 414                 if (event[i] & PM_BUSEVENT_MSK) {
 415                         unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
 416                         byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
 417                         if (unit > PM_LASTUNIT)
 418                                 return -1;
 419                         if (unit == PM_ISU0_ALT)
 420                                 unit = PM_ISU0;
 421                         if (byte >= 4) {
 422                                 if (unit != PM_LSU1)
 423                                         return -1;
 424                                 ++unit;
 425                                 byte &= 3;
 426                         }
 427                         if (!pmc)
 428                                 ++pmc_grp_use[byte & 1];
 429                         if (busbyte[byte] && busbyte[byte] != unit)
 430                                 return -1;
 431                         busbyte[byte] = unit;
 432                         unituse[unit] = 1;
 433                 }
 434         }
 435         if (pmc_grp_use[0] > 2 || pmc_grp_use[1] > 2)
 436                 return -1;
 437 
 438         /*
 439          * Assign resources and set multiplexer selects.
 440          *
 441          * PM_ISU0 can go either on TTM0 or TTM1, but that's the only
 442          * choice we have to deal with.
 443          */
 444         if (unituse[PM_ISU0] &
 445             (unituse[PM_FPU] | unituse[PM_IFU] | unituse[PM_ISU1])) {
 446                 unituse[PM_ISU0_ALT] = 1;       /* move ISU to TTM1 */
 447                 unituse[PM_ISU0] = 0;
 448         }
 449         /* Set TTM[01]SEL fields. */
 450         ttmuse = 0;
 451         for (i = PM_FPU; i <= PM_ISU1; ++i) {
 452                 if (!unituse[i])
 453                         continue;
 454                 if (ttmuse++)
 455                         return -1;
 456                 mmcr1 |= (unsigned long)i << MMCR1_TTM0SEL_SH;
 457         }
 458         ttmuse = 0;
 459         for (; i <= PM_GRS; ++i) {
 460                 if (!unituse[i])
 461                         continue;
 462                 if (ttmuse++)
 463                         return -1;
 464                 mmcr1 |= (unsigned long)(i & 3) << MMCR1_TTM1SEL_SH;
 465         }
 466         if (ttmuse > 1)
 467                 return -1;
 468 
 469         /* Set byte lane select fields, TTM[23]SEL and GRS_*SEL. */
 470         for (byte = 0; byte < 4; ++byte) {
 471                 unit = busbyte[byte];
 472                 if (!unit)
 473                         continue;
 474                 if (unit == PM_ISU0 && unituse[PM_ISU0_ALT]) {
 475                         /* get ISU0 through TTM1 rather than TTM0 */
 476                         unit = PM_ISU0_ALT;
 477                 } else if (unit == PM_LSU1 + 1) {
 478                         /* select lower word of LSU1 for this byte */
 479                         mmcr1 |= 1ul << (MMCR1_TTM3SEL_SH + 3 - byte);
 480                 }
 481                 ttm = unit >> 2;
 482                 mmcr1 |= (unsigned long)ttm
 483                         << (MMCR1_TD_CP_DBG0SEL_SH - 2 * byte);
 484         }
 485 
 486         /* Second pass: assign PMCs, set PMCxSEL and PMCx_ADDER_SEL fields */
 487         for (i = 0; i < n_ev; ++i) {
 488                 pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
 489                 unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
 490                 byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
 491                 psel = event[i] & PM_PMCSEL_MSK;
 492                 isbus = event[i] & PM_BUSEVENT_MSK;
 493                 if (!pmc) {
 494                         /* Bus event or any-PMC direct event */
 495                         for (pmc = 0; pmc < 4; ++pmc) {
 496                                 if (pmc_inuse & (1 << pmc))
 497                                         continue;
 498                                 grp = (pmc >> 1) & 1;
 499                                 if (isbus) {
 500                                         if (grp == (byte & 1))
 501                                                 break;
 502                                 } else if (pmc_grp_use[grp] < 2) {
 503                                         ++pmc_grp_use[grp];
 504                                         break;
 505                                 }
 506                         }
 507                         pmc_inuse |= 1 << pmc;
 508                 } else if (pmc <= 4) {
 509                         /* Direct event */
 510                         --pmc;
 511                         if ((psel == 8 || psel == 0x10) && isbus && (byte & 2))
 512                                 /* add events on higher-numbered bus */
 513                                 mmcr1 |= 1ul << (MMCR1_PMC1_ADDER_SEL_SH - pmc);
 514                 } else {
 515                         /* Instructions or run cycles on PMC5/6 */
 516                         --pmc;
 517                 }
 518                 if (isbus && unit == PM_GRS) {
 519                         bit = psel & 7;
 520                         grsel = (event[i] >> PM_GRS_SH) & PM_GRS_MSK;
 521                         mmcr1 |= (unsigned long)grsel << grsel_shift[bit];
 522                 }
 523                 if (power5_marked_instr_event(event[i]))
 524                         mmcra |= MMCRA_SAMPLE_ENABLE;
 525                 if (pmc <= 3)
 526                         mmcr1 |= psel << MMCR1_PMCSEL_SH(pmc);
 527                 hwc[i] = pmc;
 528         }
 529 
 530         /* Return MMCRx values */
 531         mmcr[0] = 0;
 532         if (pmc_inuse & 1)
 533                 mmcr[0] = MMCR0_PMC1CE;
 534         if (pmc_inuse & 0x3e)
 535                 mmcr[0] |= MMCR0_PMCjCE;
 536         mmcr[1] = mmcr1;
 537         mmcr[2] = mmcra;
 538         return 0;
 539 }
 540 
 541 static void power5_disable_pmc(unsigned int pmc, unsigned long mmcr[])
 542 {
 543         if (pmc <= 3)
 544                 mmcr[1] &= ~(0x7fUL << MMCR1_PMCSEL_SH(pmc));
 545 }
 546 
 547 static int power5_generic_events[] = {
 548         [PERF_COUNT_HW_CPU_CYCLES]              = 0xf,
 549         [PERF_COUNT_HW_INSTRUCTIONS]            = 0x100009,
 550         [PERF_COUNT_HW_CACHE_REFERENCES]        = 0x4c1090, /* LD_REF_L1 */
 551         [PERF_COUNT_HW_CACHE_MISSES]            = 0x3c1088, /* LD_MISS_L1 */
 552         [PERF_COUNT_HW_BRANCH_INSTRUCTIONS]     = 0x230e4,  /* BR_ISSUED */
 553         [PERF_COUNT_HW_BRANCH_MISSES]           = 0x230e5,  /* BR_MPRED_CR */
 554 };
 555 
 556 #define C(x)    PERF_COUNT_HW_CACHE_##x
 557 
 558 /*
 559  * Table of generalized cache-related events.
 560  * 0 means not supported, -1 means nonsensical, other values
 561  * are event codes.
 562  */
 563 static int power5_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
 564         [C(L1D)] = {            /*      RESULT_ACCESS   RESULT_MISS */
 565                 [C(OP_READ)] = {        0x4c1090,       0x3c1088        },
 566                 [C(OP_WRITE)] = {       0x3c1090,       0xc10c3         },
 567                 [C(OP_PREFETCH)] = {    0xc70e7,        0               },
 568         },
 569         [C(L1I)] = {            /*      RESULT_ACCESS   RESULT_MISS */
 570                 [C(OP_READ)] = {        0,              0               },
 571                 [C(OP_WRITE)] = {       -1,             -1              },
 572                 [C(OP_PREFETCH)] = {    0,              0               },
 573         },
 574         [C(LL)] = {             /*      RESULT_ACCESS   RESULT_MISS */
 575                 [C(OP_READ)] = {        0,              0x3c309b        },
 576                 [C(OP_WRITE)] = {       0,              0               },
 577                 [C(OP_PREFETCH)] = {    0xc50c3,        0               },
 578         },
 579         [C(DTLB)] = {           /*      RESULT_ACCESS   RESULT_MISS */
 580                 [C(OP_READ)] = {        0x2c4090,       0x800c4         },
 581                 [C(OP_WRITE)] = {       -1,             -1              },
 582                 [C(OP_PREFETCH)] = {    -1,             -1              },
 583         },
 584         [C(ITLB)] = {           /*      RESULT_ACCESS   RESULT_MISS */
 585                 [C(OP_READ)] = {        0,              0x800c0         },
 586                 [C(OP_WRITE)] = {       -1,             -1              },
 587                 [C(OP_PREFETCH)] = {    -1,             -1              },
 588         },
 589         [C(BPU)] = {            /*      RESULT_ACCESS   RESULT_MISS */
 590                 [C(OP_READ)] = {        0x230e4,        0x230e5         },
 591                 [C(OP_WRITE)] = {       -1,             -1              },
 592                 [C(OP_PREFETCH)] = {    -1,             -1              },
 593         },
 594         [C(NODE)] = {           /*      RESULT_ACCESS   RESULT_MISS */
 595                 [C(OP_READ)] = {        -1,             -1              },
 596                 [C(OP_WRITE)] = {       -1,             -1              },
 597                 [C(OP_PREFETCH)] = {    -1,             -1              },
 598         },
 599 };
 600 
 601 static struct power_pmu power5_pmu = {
 602         .name                   = "POWER5",
 603         .n_counter              = 6,
 604         .max_alternatives       = MAX_ALT,
 605         .add_fields             = 0x7000090000555ul,
 606         .test_adder             = 0x3000490000000ul,
 607         .compute_mmcr           = power5_compute_mmcr,
 608         .get_constraint         = power5_get_constraint,
 609         .get_alternatives       = power5_get_alternatives,
 610         .disable_pmc            = power5_disable_pmc,
 611         .n_generic              = ARRAY_SIZE(power5_generic_events),
 612         .generic_events         = power5_generic_events,
 613         .cache_events           = &power5_cache_events,
 614         .flags                  = PPMU_HAS_SSLOT,
 615 };
 616 
 617 int init_power5_pmu(void)
 618 {
 619         if (!cur_cpu_spec->oprofile_cpu_type ||
 620             strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power5"))
 621                 return -ENODEV;
 622 
 623         return register_power_pmu(&power5_pmu);
 624 }