arch/powerpc/kernel/power4-pmu.c

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