// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Performance counter support for POWER5 (not POWER5++) processors.
 *
 * Copyright 2009 Paul Mackerras, IBM Corporation.
 */
#include <linux/kernel.h>
#include <linux/perf_event.h>
#include <linux/string.h>
#include <asm/reg.h>
#include <asm/cputable.h>

#include "internal.h"

/*
 * Bits in event code for POWER5 (not POWER5++)
 */
#define PM_PMC_SH       20      /* PMC number (1-based) for direct events */
#define PM_PMC_MSK      0xf
#define PM_PMC_MSKS     (PM_PMC_MSK << PM_PMC_SH)
#define PM_UNIT_SH      16      /* TTMMUX number and setting - unit select */
#define PM_UNIT_MSK     0xf
#define PM_BYTE_SH      12      /* Byte number of event bus to use */
#define PM_BYTE_MSK     7
#define PM_GRS_SH       8       /* Storage subsystem mux select */
#define PM_GRS_MSK      7
#define PM_BUSEVENT_MSK 0x80    /* Set if event uses event bus */
#define PM_PMCSEL_MSK   0x7f

/* Values in PM_UNIT field */
#define PM_FPU          0
#define PM_ISU0         1
#define PM_IFU          2
#define PM_ISU1         3
#define PM_IDU          4
#define PM_ISU0_ALT     6
#define PM_GRS          7
#define PM_LSU0         8
#define PM_LSU1         0xc
#define PM_LASTUNIT     0xc

/*
 * Bits in MMCR1 for POWER5
 */
#define MMCR1_TTM0SEL_SH        62
#define MMCR1_TTM1SEL_SH        60
#define MMCR1_TTM2SEL_SH        58
#define MMCR1_TTM3SEL_SH        56
#define MMCR1_TTMSEL_MSK        3
#define MMCR1_TD_CP_DBG0SEL_SH  54
#define MMCR1_TD_CP_DBG1SEL_SH  52
#define MMCR1_TD_CP_DBG2SEL_SH  50
#define MMCR1_TD_CP_DBG3SEL_SH  48
#define MMCR1_GRS_L2SEL_SH      46
#define MMCR1_GRS_L2SEL_MSK     3
#define MMCR1_GRS_L3SEL_SH      44
#define MMCR1_GRS_L3SEL_MSK     3
#define MMCR1_GRS_MCSEL_SH      41
#define MMCR1_GRS_MCSEL_MSK     7
#define MMCR1_GRS_FABSEL_SH     39
#define MMCR1_GRS_FABSEL_MSK    3
#define MMCR1_PMC1_ADDER_SEL_SH 35
#define MMCR1_PMC2_ADDER_SEL_SH 34
#define MMCR1_PMC3_ADDER_SEL_SH 33
#define MMCR1_PMC4_ADDER_SEL_SH 32
#define MMCR1_PMC1SEL_SH        25
#define MMCR1_PMC2SEL_SH        17
#define MMCR1_PMC3SEL_SH        9
#define MMCR1_PMC4SEL_SH        1
#define MMCR1_PMCSEL_SH(n)      (MMCR1_PMC1SEL_SH - (n) * 8)
#define MMCR1_PMCSEL_MSK        0x7f

/*
 * Layout of constraint bits:
 * 6666555555555544444444443333333333222222222211111111110000000000
 * 3210987654321098765432109876543210987654321098765432109876543210
 *         <><>[  ><><>< ><> [  >[ >[ ><  ><  ><  ><  ><><><><><><>
 *         T0T1 NC G0G1G2 G3  UC PS1PS2 B0  B1  B2  B3 P6P5P4P3P2P1
 *
 * T0 - TTM0 constraint
 *     54-55: TTM0SEL value (0=FPU, 2=IFU, 3=ISU1) 0xc0_0000_0000_0000
 *
 * T1 - TTM1 constraint
 *     52-53: TTM1SEL value (0=IDU, 3=GRS) 0x30_0000_0000_0000
 *
 * NC - number of counters
 *     51: NC error 0x0008_0000_0000_0000
 *     48-50: number of events needing PMC1-4 0x0007_0000_0000_0000
 *
 * G0..G3 - GRS mux constraints
 *     46-47: GRS_L2SEL value
 *     44-45: GRS_L3SEL value
 *     41-44: GRS_MCSEL value
 *     39-40: GRS_FABSEL value
 *      Note that these match up with their bit positions in MMCR1
 *
 * UC - unit constraint: can't have all three of FPU|IFU|ISU1, ISU0, IDU|GRS
 *     37: UC3 error 0x20_0000_0000
 *     36: FPU|IFU|ISU1 events needed 0x10_0000_0000
 *     35: ISU0 events needed 0x08_0000_0000
 *     34: IDU|GRS events needed 0x04_0000_0000
 *
 * PS1
 *     33: PS1 error 0x2_0000_0000
 *     31-32: count of events needing PMC1/2 0x1_8000_0000
 *
 * PS2
 *     30: PS2 error 0x4000_0000
 *     28-29: count of events needing PMC3/4 0x3000_0000
 *
 * B0
 *     24-27: Byte 0 event source 0x0f00_0000
 *            Encoding as for the event code
 *
 * B1, B2, B3
 *     20-23, 16-19, 12-15: Byte 1, 2, 3 event sources
 *
 * P1..P6
 *     0-11: Count of events needing PMC1..PMC6
 */

static const int grsel_shift[8] = {
        MMCR1_GRS_L2SEL_SH, MMCR1_GRS_L2SEL_SH, MMCR1_GRS_L2SEL_SH,
        MMCR1_GRS_L3SEL_SH, MMCR1_GRS_L3SEL_SH, MMCR1_GRS_L3SEL_SH,
        MMCR1_GRS_MCSEL_SH, MMCR1_GRS_FABSEL_SH
};

/* Masks and values for using events from the various units */
static unsigned long unit_cons[PM_LASTUNIT+1][2] = {
        [PM_FPU] =   { 0xc0002000000000ul, 0x00001000000000ul },
        [PM_ISU0] =  { 0x00002000000000ul, 0x00000800000000ul },
        [PM_ISU1] =  { 0xc0002000000000ul, 0xc0001000000000ul },
        [PM_IFU] =   { 0xc0002000000000ul, 0x80001000000000ul },
        [PM_IDU] =   { 0x30002000000000ul, 0x00000400000000ul },
        [PM_GRS] =   { 0x30002000000000ul, 0x30000400000000ul },
};

static int power5_get_constraint(u64 event, unsigned long *maskp,
                                 unsigned long *valp, u64 event_config1 __maybe_unused)
{
        int pmc, byte, unit, sh;
        int bit, fmask;
        unsigned long mask = 0, value = 0;
        int grp = -1;

        pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
        if (pmc) {
                if (pmc > 6)
                        return -1;
                sh = (pmc - 1) * 2;
                mask |= 2 << sh;
                value |= 1 << sh;
                if (pmc <= 4)
                        grp = (pmc - 1) >> 1;
                else if (event != 0x500009 && event != 0x600005)
                        return -1;
        }
        if (event & PM_BUSEVENT_MSK) {
                unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
                if (unit > PM_LASTUNIT)
                        return -1;
                if (unit == PM_ISU0_ALT)
                        unit = PM_ISU0;
                mask |= unit_cons[unit][0];
                value |= unit_cons[unit][1];
                byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
                if (byte >= 4) {
                        if (unit != PM_LSU1)
                                return -1;
                        /* Map LSU1 low word (bytes 4-7) to unit LSU1+1 */
                        ++unit;
                        byte &= 3;
                }
                if (unit == PM_GRS) {
                        bit = event & 7;
                        fmask = (bit == 6)? 7: 3;
                        sh = grsel_shift[bit];
                        mask |= (unsigned long)fmask << sh;
                        value |= (unsigned long)((event >> PM_GRS_SH) & fmask)
                                << sh;
                }
                /*
                 * Bus events on bytes 0 and 2 can be counted
                 * on PMC1/2; bytes 1 and 3 on PMC3/4.
                 */
                if (!pmc)
                        grp = byte & 1;
                /* Set byte lane select field */
                mask  |= 0xfUL << (24 - 4 * byte);
                value |= (unsigned long)unit << (24 - 4 * byte);
        }
        if (grp == 0) {
                /* increment PMC1/2 field */
                mask  |= 0x200000000ul;
                value |= 0x080000000ul;
        } else if (grp == 1) {
                /* increment PMC3/4 field */
                mask  |= 0x40000000ul;
                value |= 0x10000000ul;
        }
        if (pmc < 5) {
                /* need a counter from PMC1-4 set */
                mask  |= 0x8000000000000ul;
                value |= 0x1000000000000ul;
        }
        *maskp = mask;
        *valp = value;
        return 0;
}

#define MAX_ALT 3       /* at most 3 alternatives for any event */

static const unsigned int event_alternatives[][MAX_ALT] = {
        { 0x120e4,  0x400002 },                 /* PM_GRP_DISP_REJECT */
        { 0x410c7,  0x441084 },                 /* PM_THRD_L2MISS_BOTH_CYC */
        { 0x100005, 0x600005 },                 /* PM_RUN_CYC */
        { 0x100009, 0x200009, 0x500009 },       /* PM_INST_CMPL */
        { 0x300009, 0x400009 },                 /* PM_INST_DISP */
};

/*
 * Scan the alternatives table for a match and return the
 * index into the alternatives table if found, else -1.
 */
static int find_alternative(u64 event)
{
        int i, j;

        for (i = 0; i < ARRAY_SIZE(event_alternatives); ++i) {
                if (event < event_alternatives[i][0])
                        break;
                for (j = 0; j < MAX_ALT && event_alternatives[i][j]; ++j)
                        if (event == event_alternatives[i][j])
                                return i;
        }
        return -1;
}

static const unsigned char bytedecode_alternatives[4][4] = {
        /* PMC 1 */     { 0x21, 0x23, 0x25, 0x27 },
        /* PMC 2 */     { 0x07, 0x17, 0x0e, 0x1e },
        /* PMC 3 */     { 0x20, 0x22, 0x24, 0x26 },
        /* PMC 4 */     { 0x07, 0x17, 0x0e, 0x1e }
};

/*
 * Some direct events for decodes of event bus byte 3 have alternative
 * PMCSEL values on other counters.  This returns the alternative
 * event code for those that do, or -1 otherwise.
 */
static s64 find_alternative_bdecode(u64 event)
{
        int pmc, altpmc, pp, j;

        pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
        if (pmc == 0 || pmc > 4)
                return -1;
        altpmc = 5 - pmc;       /* 1 <-> 4, 2 <-> 3 */
        pp = event & PM_PMCSEL_MSK;
        for (j = 0; j < 4; ++j) {
                if (bytedecode_alternatives[pmc - 1][j] == pp) {
                        return (event & ~(PM_PMC_MSKS | PM_PMCSEL_MSK)) |
                                (altpmc << PM_PMC_SH) |
                                bytedecode_alternatives[altpmc - 1][j];
                }
        }
        return -1;
}

static int power5_get_alternatives(u64 event, unsigned int flags, u64 alt[])
{
        int i, j, nalt = 1;
        s64 ae;

        alt[0] = event;
        nalt = 1;
        i = find_alternative(event);
        if (i >= 0) {
                for (j = 0; j < MAX_ALT; ++j) {
                        ae = event_alternatives[i][j];
                        if (ae && ae != event)
                                alt[nalt++] = ae;
                }
        } else {
                ae = find_alternative_bdecode(event);
                if (ae > 0)
                        alt[nalt++] = ae;
        }
        return nalt;
}

/*
 * Map of which direct events on which PMCs are marked instruction events.
 * Indexed by PMCSEL value, bit i (LE) set if PMC i is a marked event.
 * Bit 0 is set if it is marked for all PMCs.
 * The 0x80 bit indicates a byte decode PMCSEL value.
 */
static unsigned char direct_event_is_marked[0x28] = {
        0,      /* 00 */
        0x1f,   /* 01 PM_IOPS_CMPL */
        0x2,    /* 02 PM_MRK_GRP_DISP */
        0xe,    /* 03 PM_MRK_ST_CMPL, PM_MRK_ST_GPS, PM_MRK_ST_CMPL_INT */
        0,      /* 04 */
        0x1c,   /* 05 PM_MRK_BRU_FIN, PM_MRK_INST_FIN, PM_MRK_CRU_FIN */
        0x80,   /* 06 */
        0x80,   /* 07 */
        0, 0, 0,/* 08 - 0a */
        0x18,   /* 0b PM_THRESH_TIMEO, PM_MRK_GRP_TIMEO */
        0,      /* 0c */
        0x80,   /* 0d */
        0x80,   /* 0e */
        0,      /* 0f */
        0,      /* 10 */
        0x14,   /* 11 PM_MRK_GRP_BR_REDIR, PM_MRK_GRP_IC_MISS */
        0,      /* 12 */
        0x10,   /* 13 PM_MRK_GRP_CMPL */
        0x1f,   /* 14 PM_GRP_MRK, PM_MRK_{FXU,FPU,LSU}_FIN */
        0x2,    /* 15 PM_MRK_GRP_ISSUED */
        0x80,   /* 16 */
        0x80,   /* 17 */
        0, 0, 0, 0, 0,
        0x80,   /* 1d */
        0x80,   /* 1e */
        0,      /* 1f */
        0x80,   /* 20 */
        0x80,   /* 21 */
        0x80,   /* 22 */
        0x80,   /* 23 */
        0x80,   /* 24 */
        0x80,   /* 25 */
        0x80,   /* 26 */
        0x80,   /* 27 */
};

/*
 * Returns 1 if event counts things relating to marked instructions
 * and thus needs the MMCRA_SAMPLE_ENABLE bit set, or 0 if not.
 */
static int power5_marked_instr_event(u64 event)
{
        int pmc, psel;
        int bit, byte, unit;
        u32 mask;

        pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
        psel = event & PM_PMCSEL_MSK;
        if (pmc >= 5)
                return 0;

        bit = -1;
        if (psel < sizeof(direct_event_is_marked)) {
                if (direct_event_is_marked[psel] & (1 << pmc))
                        return 1;
                if (direct_event_is_marked[psel] & 0x80)
                        bit = 4;
                else if (psel == 0x08)
                        bit = pmc - 1;
                else if (psel == 0x10)
                        bit = 4 - pmc;
                else if (psel == 0x1b && (pmc == 1 || pmc == 3))
                        bit = 4;
        } else if ((psel & 0x58) == 0x40)
                bit = psel & 7;

        if (!(event & PM_BUSEVENT_MSK))
                return 0;

        byte = (event >> PM_BYTE_SH) & PM_BYTE_MSK;
        unit = (event >> PM_UNIT_SH) & PM_UNIT_MSK;
        if (unit == PM_LSU0) {
                /* byte 1 bits 0-7, byte 2 bits 0,2-4,6 */
                mask = 0x5dff00;
        } else if (unit == PM_LSU1 && byte >= 4) {
                byte -= 4;
                /* byte 4 bits 1,3,5,7, byte 5 bits 6-7, byte 7 bits 0-4,6 */
                mask = 0x5f00c0aa;
        } else
                return 0;

        return (mask >> (byte * 8 + bit)) & 1;
}

static int power5_compute_mmcr(u64 event[], int n_ev,
                               unsigned int hwc[], struct mmcr_regs *mmcr,
                               struct perf_event *pevents[],
                               u32 flags __maybe_unused)
{
        unsigned long mmcr1 = 0;
        unsigned long mmcra = MMCRA_SDAR_DCACHE_MISS | MMCRA_SDAR_ERAT_MISS;
        unsigned int pmc, unit, byte, psel;
        unsigned int ttm, grp;
        int i, isbus, bit, grsel;
        unsigned int pmc_inuse = 0;
        unsigned int pmc_grp_use[2];
        unsigned char busbyte[4];
        unsigned char unituse[16];
        int ttmuse;

        if (n_ev > 6)
                return -1;

        /* First pass to count resource use */
        pmc_grp_use[0] = pmc_grp_use[1] = 0;
        memset(busbyte, 0, sizeof(busbyte));
        memset(unituse, 0, sizeof(unituse));
        for (i = 0; i < n_ev; ++i) {
                pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
                if (pmc) {
                        if (pmc > 6)
                                return -1;
                        if (pmc_inuse & (1 << (pmc - 1)))
                                return -1;
                        pmc_inuse |= 1 << (pmc - 1);
                        /* count 1/2 vs 3/4 use */
                        if (pmc <= 4)
                                ++pmc_grp_use[(pmc - 1) >> 1];
                }
                if (event[i] & PM_BUSEVENT_MSK) {
                        unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
                        byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
                        if (unit > PM_LASTUNIT)
                                return -1;
                        if (unit == PM_ISU0_ALT)
                                unit = PM_ISU0;
                        if (byte >= 4) {
                                if (unit != PM_LSU1)
                                        return -1;
                                ++unit;
                                byte &= 3;
                        }
                        if (!pmc)
                                ++pmc_grp_use[byte & 1];
                        if (busbyte[byte] && busbyte[byte] != unit)
                                return -1;
                        busbyte[byte] = unit;
                        unituse[unit] = 1;
                }
        }
        if (pmc_grp_use[0] > 2 || pmc_grp_use[1] > 2)
                return -1;

        /*
         * Assign resources and set multiplexer selects.
         *
         * PM_ISU0 can go either on TTM0 or TTM1, but that's the only
         * choice we have to deal with.
         */
        if (unituse[PM_ISU0] &
            (unituse[PM_FPU] | unituse[PM_IFU] | unituse[PM_ISU1])) {
                unituse[PM_ISU0_ALT] = 1;       /* move ISU to TTM1 */
                unituse[PM_ISU0] = 0;
        }
        /* Set TTM[01]SEL fields. */
        ttmuse = 0;
        for (i = PM_FPU; i <= PM_ISU1; ++i) {
                if (!unituse[i])
                        continue;
                if (ttmuse++)
                        return -1;
                mmcr1 |= (unsigned long)i << MMCR1_TTM0SEL_SH;
        }
        ttmuse = 0;
        for (; i <= PM_GRS; ++i) {
                if (!unituse[i])
                        continue;
                if (ttmuse++)
                        return -1;
                mmcr1 |= (unsigned long)(i & 3) << MMCR1_TTM1SEL_SH;
        }
        if (ttmuse > 1)
                return -1;

        /* Set byte lane select fields, TTM[23]SEL and GRS_*SEL. */
        for (byte = 0; byte < 4; ++byte) {
                unit = busbyte[byte];
                if (!unit)
                        continue;
                if (unit == PM_ISU0 && unituse[PM_ISU0_ALT]) {
                        /* get ISU0 through TTM1 rather than TTM0 */
                        unit = PM_ISU0_ALT;
                } else if (unit == PM_LSU1 + 1) {
                        /* select lower word of LSU1 for this byte */
                        mmcr1 |= 1ul << (MMCR1_TTM3SEL_SH + 3 - byte);
                }
                ttm = unit >> 2;
                mmcr1 |= (unsigned long)ttm
                        << (MMCR1_TD_CP_DBG0SEL_SH - 2 * byte);
        }

        /* Second pass: assign PMCs, set PMCxSEL and PMCx_ADDER_SEL fields */
        for (i = 0; i < n_ev; ++i) {
                pmc = (event[i] >> PM_PMC_SH) & PM_PMC_MSK;
                unit = (event[i] >> PM_UNIT_SH) & PM_UNIT_MSK;
                byte = (event[i] >> PM_BYTE_SH) & PM_BYTE_MSK;
                psel = event[i] & PM_PMCSEL_MSK;
                isbus = event[i] & PM_BUSEVENT_MSK;
                if (!pmc) {
                        /* Bus event or any-PMC direct event */
                        for (pmc = 0; pmc < 4; ++pmc) {
                                if (pmc_inuse & (1 << pmc))
                                        continue;
                                grp = (pmc >> 1) & 1;
                                if (isbus) {
                                        if (grp == (byte & 1))
                                                break;
                                } else if (pmc_grp_use[grp] < 2) {
                                        ++pmc_grp_use[grp];
                                        break;
                                }
                        }
                        pmc_inuse |= 1 << pmc;
                } else if (pmc <= 4) {
                        /* Direct event */
                        --pmc;
                        if ((psel == 8 || psel == 0x10) && isbus && (byte & 2))
                                /* add events on higher-numbered bus */
                                mmcr1 |= 1ul << (MMCR1_PMC1_ADDER_SEL_SH - pmc);
                } else {
                        /* Instructions or run cycles on PMC5/6 */
                        --pmc;
                }
                if (isbus && unit == PM_GRS) {
                        bit = psel & 7;
                        grsel = (event[i] >> PM_GRS_SH) & PM_GRS_MSK;
                        mmcr1 |= (unsigned long)grsel << grsel_shift[bit];
                }
                if (power5_marked_instr_event(event[i]))
                        mmcra |= MMCRA_SAMPLE_ENABLE;
                if (pmc <= 3)
                        mmcr1 |= psel << MMCR1_PMCSEL_SH(pmc);
                hwc[i] = pmc;
        }

        /* Return MMCRx values */
        mmcr->mmcr0 = 0;
        if (pmc_inuse & 1)
                mmcr->mmcr0 = MMCR0_PMC1CE;
        if (pmc_inuse & 0x3e)
                mmcr->mmcr0 |= MMCR0_PMCjCE;
        mmcr->mmcr1 = mmcr1;
        mmcr->mmcra = mmcra;
        return 0;
}

static void power5_disable_pmc(unsigned int pmc, struct mmcr_regs *mmcr)
{
        if (pmc <= 3)
                mmcr->mmcr1 &= ~(0x7fUL << MMCR1_PMCSEL_SH(pmc));
}

static int power5_generic_events[] = {
        [PERF_COUNT_HW_CPU_CYCLES]              = 0xf,
        [PERF_COUNT_HW_INSTRUCTIONS]            = 0x100009,
        [PERF_COUNT_HW_CACHE_REFERENCES]        = 0x4c1090, /* LD_REF_L1 */
        [PERF_COUNT_HW_CACHE_MISSES]            = 0x3c1088, /* LD_MISS_L1 */
        [PERF_COUNT_HW_BRANCH_INSTRUCTIONS]     = 0x230e4,  /* BR_ISSUED */
        [PERF_COUNT_HW_BRANCH_MISSES]           = 0x230e5,  /* BR_MPRED_CR */
};

#define C(x)    PERF_COUNT_HW_CACHE_##x

/*
 * Table of generalized cache-related events.
 * 0 means not supported, -1 means nonsensical, other values
 * are event codes.
 */
static u64 power5_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
        [C(L1D)] = {            /*      RESULT_ACCESS   RESULT_MISS */
                [C(OP_READ)] = {        0x4c1090,       0x3c1088        },
                [C(OP_WRITE)] = {       0x3c1090,       0xc10c3         },
                [C(OP_PREFETCH)] = {    0xc70e7,        0               },
        },
        [C(L1I)] = {            /*      RESULT_ACCESS   RESULT_MISS */
                [C(OP_READ)] = {        0,              0               },
                [C(OP_WRITE)] = {       -1,             -1              },
                [C(OP_PREFETCH)] = {    0,              0               },
        },
        [C(LL)] = {             /*      RESULT_ACCESS   RESULT_MISS */
                [C(OP_READ)] = {        0,              0x3c309b        },
                [C(OP_WRITE)] = {       0,              0               },
                [C(OP_PREFETCH)] = {    0xc50c3,        0               },
        },
        [C(DTLB)] = {           /*      RESULT_ACCESS   RESULT_MISS */
                [C(OP_READ)] = {        0x2c4090,       0x800c4         },
                [C(OP_WRITE)] = {       -1,             -1              },
                [C(OP_PREFETCH)] = {    -1,             -1              },
        },
        [C(ITLB)] = {           /*      RESULT_ACCESS   RESULT_MISS */
                [C(OP_READ)] = {        0,              0x800c0         },
                [C(OP_WRITE)] = {       -1,             -1              },
                [C(OP_PREFETCH)] = {    -1,             -1              },
        },
        [C(BPU)] = {            /*      RESULT_ACCESS   RESULT_MISS */
                [C(OP_READ)] = {        0x230e4,        0x230e5         },
                [C(OP_WRITE)] = {       -1,             -1              },
                [C(OP_PREFETCH)] = {    -1,             -1              },
        },
        [C(NODE)] = {           /*      RESULT_ACCESS   RESULT_MISS */
                [C(OP_READ)] = {        -1,             -1              },
                [C(OP_WRITE)] = {       -1,             -1              },
                [C(OP_PREFETCH)] = {    -1,             -1              },
        },
};

static struct power_pmu power5_pmu = {
        .name                   = "POWER5",
        .n_counter              = 6,
        .max_alternatives       = MAX_ALT,
        .add_fields             = 0x7000090000555ul,
        .test_adder             = 0x3000490000000ul,
        .compute_mmcr           = power5_compute_mmcr,
        .get_constraint         = power5_get_constraint,
        .get_alternatives       = power5_get_alternatives,
        .disable_pmc            = power5_disable_pmc,
        .n_generic              = ARRAY_SIZE(power5_generic_events),
        .generic_events         = power5_generic_events,
        .cache_events           = &power5_cache_events,
        .flags                  = PPMU_HAS_SSLOT,
};

int __init init_power5_pmu(void)
{
        unsigned int pvr = mfspr(SPRN_PVR);

        if (PVR_VER(pvr) != PVR_POWER5)
                return -ENODEV;

        return register_power_pmu(&power5_pmu);
}