nuclei-sdk/tools/scripts/templates/hpm.tmpl

{# note: jinja2 hpm.tmpl > hmp.h#}

    switch (idx) {
#if __RISCV_XLEN == 32
        {% for item in range(3, 32) -%}
        case {{item}}: __RV_CSR_WRITE(CSR_MHPMCOUNTER{{item}}, 0); // prevent carry
            __RV_CSR_WRITE(CSR_MHPMCOUNTER{{item}}H, (uint32_t)(value >> 32));
            __RV_CSR_WRITE(CSR_MHPMCOUNTER{{item}}, (uint32_t)(value)); break;
        {% endfor %}
#elif __RISCV_XLEN == 64
        {% for item in range(3, 32) -%}
        case {{item}}: __RV_CSR_WRITE(CSR_MHPMCOUNTER{{item}}, (value)); break;
        {% endfor %}
#else
#endif
        default: break;
    }

#if __RISCV_XLEN == 32
    volatile uint32_t high0, low, high;
    uint64_t full;

    switch (idx) {
        case 0: return __get_rv_cycle();
        case 2: return __get_rv_instret();
        {% for item in range(3, 32) -%}
        case {{item}}: high0 = __RV_CSR_READ(CSR_MHPMCOUNTER{{item}}H);
            low = __RV_CSR_READ(CSR_MHPMCOUNTER{{item}});
            high = __RV_CSR_READ(CSR_MHPMCOUNTER{{item}}H);
            if (high0 != high) { low = __RV_CSR_READ(CSR_MHPMCOUNTER{{item}}); }
            full = (((uint64_t)high) << 32) | low; return full;
        {% endfor %}
#elif __RISCV_XLEN == 64
    switch (idx) {
        case 0: return __get_rv_cycle();
        case 2: return __get_rv_instret();
        {% for item in range(3, 32) -%}
        case {{item}}: return __RV_CSR_READ(CSR_MHPMCOUNTER{{item}});
        {% endfor %}
#else
    switch (idx) {
#endif
        default: return 0;
    }

switch (idx) {
    {% for item in range(3, 32) -%}
    case {{item}}: __RV_CSR_WRITE(CSR_MHPMEVENT{{item}}, event); break;
    {% endfor %}default: break;
}


switch (idx) {
    {% for item in range(3, 32) -%}
    case {{item}}: return __RV_CSR_READ(CSR_MHPMEVENT{{item}});
    {% endfor %}default: return 0;
}