perfmon_mckinley.h

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/*
 * This file contains the McKinley PMU register description tables
 * and pmc checker used by perfmon.c.
 *
 * Copyright (C) 2002-2003  Hewlett Packard Co
 *               Stephane Eranian <[email protected]>
 */
static int pfm_mck_pmc_check(struct task_struct *task, pfm_context_t *ctx, unsigned int cnum, unsigned long *val, struct pt_regs *regs);

static pfm_reg_desc_t pfm_mck_pmc_desc[PMU_MAX_PMCS]={
/* pmc0  */ { PFM_REG_CONTROL , 0, 0x1UL, -1UL, NULL, NULL, {0UL,0UL, 0UL, 0UL}, {0UL,0UL, 0UL, 0UL}},
/* pmc1  */ { PFM_REG_CONTROL , 0, 0x0UL, -1UL, NULL, NULL, {0UL,0UL, 0UL, 0UL}, {0UL,0UL, 0UL, 0UL}},
/* pmc2  */ { PFM_REG_CONTROL , 0, 0x0UL, -1UL, NULL, NULL, {0UL,0UL, 0UL, 0UL}, {0UL,0UL, 0UL, 0UL}},
/* pmc3  */ { PFM_REG_CONTROL , 0, 0x0UL, -1UL, NULL, NULL, {0UL,0UL, 0UL, 0UL}, {0UL,0UL, 0UL, 0UL}},
/* pmc4  */ { PFM_REG_COUNTING, 6, 0x0000000000800000UL, 0xfffff7fUL, NULL, pfm_mck_pmc_check, {RDEP(4),0UL, 0UL, 0UL}, {0UL,0UL, 0UL, 0UL}},
/* pmc5  */ { PFM_REG_COUNTING, 6, 0x0UL, 0xfffff7fUL, NULL,  pfm_mck_pmc_check, {RDEP(5),0UL, 0UL, 0UL}, {0UL,0UL, 0UL, 0UL}},
/* pmc6  */ { PFM_REG_COUNTING, 6, 0x0UL, 0xfffff7fUL, NULL,  pfm_mck_pmc_check, {RDEP(6),0UL, 0UL, 0UL}, {0UL,0UL, 0UL, 0UL}},
/* pmc7  */ { PFM_REG_COUNTING, 6, 0x0UL, 0xfffff7fUL, NULL,  pfm_mck_pmc_check, {RDEP(7),0UL, 0UL, 0UL}, {0UL,0UL, 0UL, 0UL}},
/* pmc8  */ { PFM_REG_CONFIG  , 0, 0xffffffff3fffffffUL, 0xffffffff3ffffffbUL, NULL, pfm_mck_pmc_check, {0UL,0UL, 0UL, 0UL}, {0UL,0UL, 0UL, 0UL}},
/* pmc9  */ { PFM_REG_CONFIG  , 0, 0xffffffff3ffffffcUL, 0xffffffff3ffffffbUL, NULL, pfm_mck_pmc_check, {0UL,0UL, 0UL, 0UL}, {0UL,0UL, 0UL, 0UL}},
/* pmc10 */ { PFM_REG_MONITOR , 4, 0x0UL, 0xffffUL, NULL, pfm_mck_pmc_check, {RDEP(0)|RDEP(1),0UL, 0UL, 0UL}, {0UL,0UL, 0UL, 0UL}},
/* pmc11 */ { PFM_REG_MONITOR , 6, 0x0UL, 0x30f01cf, NULL,  pfm_mck_pmc_check, {RDEP(2)|RDEP(3)|RDEP(17),0UL, 0UL, 0UL}, {0UL,0UL, 0UL, 0UL}},
/* pmc12 */ { PFM_REG_MONITOR , 6, 0x0UL, 0xffffUL, NULL,  pfm_mck_pmc_check, {RDEP(8)|RDEP(9)|RDEP(10)|RDEP(11)|RDEP(12)|RDEP(13)|RDEP(14)|RDEP(15)|RDEP(16),0UL, 0UL, 0UL}, {0UL,0UL, 0UL, 0UL}},
/* pmc13 */ { PFM_REG_CONFIG  , 0, 0x00002078fefefefeUL, 0x1e00018181818UL, NULL, pfm_mck_pmc_check, {0UL,0UL, 0UL, 0UL}, {0UL,0UL, 0UL, 0UL}},
/* pmc14 */ { PFM_REG_CONFIG  , 0, 0x0db60db60db60db6UL, 0x2492UL, NULL, pfm_mck_pmc_check, {0UL,0UL, 0UL, 0UL}, {0UL,0UL, 0UL, 0UL}},
/* pmc15 */ { PFM_REG_CONFIG  , 0, 0x00000000fffffff0UL, 0xfUL, NULL, pfm_mck_pmc_check, {0UL,0UL, 0UL, 0UL}, {0UL,0UL, 0UL, 0UL}},
        { PFM_REG_END     , 0, 0x0UL, -1UL, NULL, NULL, {0,}, {0,}}, /* end marker */
};

static pfm_reg_desc_t pfm_mck_pmd_desc[PMU_MAX_PMDS]={
/* pmd0  */ { PFM_REG_BUFFER  , 0, 0x0UL, -1UL, NULL, NULL, {RDEP(1),0UL, 0UL, 0UL}, {RDEP(10),0UL, 0UL, 0UL}},
/* pmd1  */ { PFM_REG_BUFFER  , 0, 0x0UL, -1UL, NULL, NULL, {RDEP(0),0UL, 0UL, 0UL}, {RDEP(10),0UL, 0UL, 0UL}},
/* pmd2  */ { PFM_REG_BUFFER  , 0, 0x0UL, -1UL, NULL, NULL, {RDEP(3)|RDEP(17),0UL, 0UL, 0UL}, {RDEP(11),0UL, 0UL, 0UL}},
/* pmd3  */ { PFM_REG_BUFFER  , 0, 0x0UL, -1UL, NULL, NULL, {RDEP(2)|RDEP(17),0UL, 0UL, 0UL}, {RDEP(11),0UL, 0UL, 0UL}},
/* pmd4  */ { PFM_REG_COUNTING, 0, 0x0UL, -1UL, NULL, NULL, {0UL,0UL, 0UL, 0UL}, {RDEP(4),0UL, 0UL, 0UL}},
/* pmd5  */ { PFM_REG_COUNTING, 0, 0x0UL, -1UL, NULL, NULL, {0UL,0UL, 0UL, 0UL}, {RDEP(5),0UL, 0UL, 0UL}},
/* pmd6  */ { PFM_REG_COUNTING, 0, 0x0UL, -1UL, NULL, NULL, {0UL,0UL, 0UL, 0UL}, {RDEP(6),0UL, 0UL, 0UL}},
/* pmd7  */ { PFM_REG_COUNTING, 0, 0x0UL, -1UL, NULL, NULL, {0UL,0UL, 0UL, 0UL}, {RDEP(7),0UL, 0UL, 0UL}},
/* pmd8  */ { PFM_REG_BUFFER  , 0, 0x0UL, -1UL, NULL, NULL, {RDEP(9)|RDEP(10)|RDEP(11)|RDEP(12)|RDEP(13)|RDEP(14)|RDEP(15)|RDEP(16),0UL, 0UL, 0UL}, {RDEP(12),0UL, 0UL, 0UL}},
/* pmd9  */ { PFM_REG_BUFFER  , 0, 0x0UL, -1UL, NULL, NULL, {RDEP(8)|RDEP(10)|RDEP(11)|RDEP(12)|RDEP(13)|RDEP(14)|RDEP(15)|RDEP(16),0UL, 0UL, 0UL}, {RDEP(12),0UL, 0UL, 0UL}},
/* pmd10 */ { PFM_REG_BUFFER  , 0, 0x0UL, -1UL, NULL, NULL, {RDEP(8)|RDEP(9)|RDEP(11)|RDEP(12)|RDEP(13)|RDEP(14)|RDEP(15)|RDEP(16),0UL, 0UL, 0UL}, {RDEP(12),0UL, 0UL, 0UL}},
/* pmd11 */ { PFM_REG_BUFFER  , 0, 0x0UL, -1UL, NULL, NULL, {RDEP(8)|RDEP(9)|RDEP(10)|RDEP(12)|RDEP(13)|RDEP(14)|RDEP(15)|RDEP(16),0UL, 0UL, 0UL}, {RDEP(12),0UL, 0UL, 0UL}},
/* pmd12 */ { PFM_REG_BUFFER  , 0, 0x0UL, -1UL, NULL, NULL, {RDEP(8)|RDEP(9)|RDEP(10)|RDEP(11)|RDEP(13)|RDEP(14)|RDEP(15)|RDEP(16),0UL, 0UL, 0UL}, {RDEP(12),0UL, 0UL, 0UL}},
/* pmd13 */ { PFM_REG_BUFFER  , 0, 0x0UL, -1UL, NULL, NULL, {RDEP(8)|RDEP(9)|RDEP(10)|RDEP(11)|RDEP(12)|RDEP(14)|RDEP(15)|RDEP(16),0UL, 0UL, 0UL}, {RDEP(12),0UL, 0UL, 0UL}},
/* pmd14 */ { PFM_REG_BUFFER  , 0, 0x0UL, -1UL, NULL, NULL, {RDEP(8)|RDEP(9)|RDEP(10)|RDEP(11)|RDEP(12)|RDEP(13)|RDEP(15)|RDEP(16),0UL, 0UL, 0UL}, {RDEP(12),0UL, 0UL, 0UL}},
/* pmd15 */ { PFM_REG_BUFFER  , 0, 0x0UL, -1UL, NULL, NULL, {RDEP(8)|RDEP(9)|RDEP(10)|RDEP(11)|RDEP(12)|RDEP(13)|RDEP(14)|RDEP(16),0UL, 0UL, 0UL}, {RDEP(12),0UL, 0UL, 0UL}},
/* pmd16 */ { PFM_REG_BUFFER  , 0, 0x0UL, -1UL, NULL, NULL, {RDEP(8)|RDEP(9)|RDEP(10)|RDEP(11)|RDEP(12)|RDEP(13)|RDEP(14)|RDEP(15),0UL, 0UL, 0UL}, {RDEP(12),0UL, 0UL, 0UL}},
/* pmd17 */ { PFM_REG_BUFFER  , 0, 0x0UL, -1UL, NULL, NULL, {RDEP(2)|RDEP(3),0UL, 0UL, 0UL}, {RDEP(11),0UL, 0UL, 0UL}},
        { PFM_REG_END     , 0, 0x0UL, -1UL, NULL, NULL, {0,}, {0,}}, /* end marker */
};

/*
 * PMC reserved fields must have their power-up values preserved
 */
static int
pfm_mck_reserved(unsigned int cnum, unsigned long *val, struct pt_regs *regs)
{
    unsigned long tmp1, tmp2, ival = *val;

    /* remove reserved areas from user value */
    tmp1 = ival & PMC_RSVD_MASK(cnum);

    /* get reserved fields values */
    tmp2 = PMC_DFL_VAL(cnum) & ~PMC_RSVD_MASK(cnum);

    *val = tmp1 | tmp2;

    DPRINT(("pmc[%d]=0x%lx, mask=0x%lx, reset=0x%lx, val=0x%lx\n",
          cnum, ival, PMC_RSVD_MASK(cnum), PMC_DFL_VAL(cnum), *val));
    return 0;
}

/*
 * task can be NULL if the context is unloaded
 */
static int
pfm_mck_pmc_check(struct task_struct *task, pfm_context_t *ctx, unsigned int cnum, unsigned long *val, struct pt_regs *regs)
{
    int ret = 0, check_case1 = 0;
    unsigned long val8 = 0, val14 = 0, val13 = 0;
    int is_loaded;

    /* first preserve the reserved fields */
    pfm_mck_reserved(cnum, val, regs);

    /* sanitfy check */
    if (ctx == NULL) return -EINVAL;

    is_loaded = ctx->ctx_state == PFM_CTX_LOADED || ctx->ctx_state == PFM_CTX_MASKED;

    /*
     * we must clear the debug registers if pmc13 has a value which enable
     * memory pipeline event constraints. In this case we need to clear the
     * the debug registers if they have not yet been accessed. This is required
     * to avoid picking stale state.
     * PMC13 is "active" if:
     *  one of the pmc13.cfg_dbrpXX field is different from 0x3
     * AND
     *  at the corresponding pmc13.ena_dbrpXX is set.
     */
    DPRINT(("cnum=%u val=0x%lx, using_dbreg=%d loaded=%d\n", cnum, *val, ctx->ctx_fl_using_dbreg, is_loaded));

    if (cnum == 13 && is_loaded
        && (*val & 0x1e00000000000UL) && (*val & 0x18181818UL) != 0x18181818UL && ctx->ctx_fl_using_dbreg == 0) {

        DPRINT(("pmc[%d]=0x%lx has active pmc13 settings, clearing dbr\n", cnum, *val));

        /* don't mix debug with perfmon */
        if (task && (task->thread.flags & IA64_THREAD_DBG_VALID) != 0) return -EINVAL;

        /*
         * a count of 0 will mark the debug registers as in use and also
         * ensure that they are properly cleared.
         */
        ret = pfm_write_ibr_dbr(PFM_DATA_RR, ctx, NULL, 0, regs);
        if (ret) return ret;
    }
    /*
     * we must clear the (instruction) debug registers if any pmc14.ibrpX bit is enabled
     * before they are (fl_using_dbreg==0) to avoid picking up stale information.
     */
    if (cnum == 14 && is_loaded && ((*val & 0x2222UL) != 0x2222UL) && ctx->ctx_fl_using_dbreg == 0) {

        DPRINT(("pmc[%d]=0x%lx has active pmc14 settings, clearing ibr\n", cnum, *val));

        /* don't mix debug with perfmon */
        if (task && (task->thread.flags & IA64_THREAD_DBG_VALID) != 0) return -EINVAL;

        /*
         * a count of 0 will mark the debug registers as in use and also
         * ensure that they are properly cleared.
         */
        ret = pfm_write_ibr_dbr(PFM_CODE_RR, ctx, NULL, 0, regs);
        if (ret) return ret;

    }

    switch(cnum) {
        case  4: *val |= 1UL << 23; /* force power enable bit */
             break;
        case  8: val8 = *val;
             val13 = ctx->ctx_pmcs[13];
             val14 = ctx->ctx_pmcs[14];
             check_case1 = 1;
             break;
        case 13: val8  = ctx->ctx_pmcs[8];
             val13 = *val;
             val14 = ctx->ctx_pmcs[14];
             check_case1 = 1;
             break;
        case 14: val8  = ctx->ctx_pmcs[8];
             val13 = ctx->ctx_pmcs[13];
             val14 = *val;
             check_case1 = 1;
             break;
    }
    /* check illegal configuration which can produce inconsistencies in tagging
     * i-side events in L1D and L2 caches
     */
    if (check_case1) {
        ret =   ((val13 >> 45) & 0xf) == 0
           && ((val8 & 0x1) == 0)
           && ((((val14>>1) & 0x3) == 0x2 || ((val14>>1) & 0x3) == 0x0)
               ||(((val14>>4) & 0x3) == 0x2 || ((val14>>4) & 0x3) == 0x0));

        if (ret) DPRINT((KERN_DEBUG "perfmon: failure check_case1\n"));
    }

    return ret ? -EINVAL : 0;
}

/*
 * impl_pmcs, impl_pmds are computed at runtime to minimize errors!
 */
static pmu_config_t pmu_conf_mck={
    .pmu_name      = "Itanium 2",
    .pmu_family    = 0x1f,
    .flags         = PFM_PMU_IRQ_RESEND,
    .ovfl_val      = (1UL << 47) - 1,
    .pmd_desc      = pfm_mck_pmd_desc,
    .pmc_desc      = pfm_mck_pmc_desc,
    .num_ibrs       = 8,
    .num_dbrs       = 8,
    .use_rr_dbregs = 1 /* debug register are use for range restrictions */
};