diff options
| author | Aaron Lindsay <aaron@os.amperecomputing.com> | 2019-01-21 10:23:14 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2019-01-21 10:38:56 +0000 |
| commit | 0d4bfd7df809863b1f45fad35229fb9419527d06 (patch) | |
| tree | 2d481f276e832b2c156a32e6c79bc22045eb190e /target | |
| parent | ac689a2e5155d129acaa39603e2a7a29abd90d89 (diff) | |
target/arm: Implement PMSWINC
Signed-off-by: Aaron Lindsay <alindsay@codeaurora.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20181211151945.29137-14-aaron@os.amperecomputing.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target')
| -rw-r--r-- | target/arm/helper.c | 39 |
1 files changed, 37 insertions, 2 deletions
diff --git a/target/arm/helper.c b/target/arm/helper.c index 44f1340ee1..92666e5208 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -1027,6 +1027,15 @@ static bool event_always_supported(CPUARMState *env) return true; } +static uint64_t swinc_get_count(CPUARMState *env) +{ + /* + * SW_INCR events are written directly to the pmevcntr's by writes to + * PMSWINC, so there is no underlying count maintained by the PMU itself + */ + return 0; +} + /* * Return the underlying cycle count for the PMU cycle counters. If we're in * usermode, simply return 0. @@ -1054,6 +1063,10 @@ static uint64_t instructions_get_count(CPUARMState *env) #endif static const pm_event pm_events[] = { + { .number = 0x000, /* SW_INCR */ + .supported = event_always_supported, + .get_count = swinc_get_count, + }, #ifndef CONFIG_USER_ONLY { .number = 0x008, /* INST_RETIRED, Instruction architecturally executed */ .supported = instructions_supported, @@ -1393,6 +1406,24 @@ static void pmcr_write(CPUARMState *env, const ARMCPRegInfo *ri, pmu_op_finish(env); } +static void pmswinc_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + unsigned int i; + for (i = 0; i < pmu_num_counters(env); i++) { + /* Increment a counter's count iff: */ + if ((value & (1 << i)) && /* counter's bit is set */ + /* counter is enabled and not filtered */ + pmu_counter_enabled(env, i) && + /* counter is SW_INCR */ + (env->cp15.c14_pmevtyper[i] & PMXEVTYPER_EVTCOUNT) == 0x0) { + pmevcntr_op_start(env, i); + env->cp15.c14_pmevcntr[i]++; + pmevcntr_op_finish(env, i); + } + } +} + static uint64_t pmccntr_read(CPUARMState *env, const ARMCPRegInfo *ri) { uint64_t ret; @@ -1822,9 +1853,13 @@ static const ARMCPRegInfo v7_cp_reginfo[] = { .fieldoffset = offsetof(CPUARMState, cp15.c9_pmovsr), .writefn = pmovsr_write, .raw_writefn = raw_write }, - /* Unimplemented so WI. */ { .name = "PMSWINC", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 4, - .access = PL0_W, .accessfn = pmreg_access_swinc, .type = ARM_CP_NOP }, + .access = PL0_W, .accessfn = pmreg_access_swinc, .type = ARM_CP_NO_RAW, + .writefn = pmswinc_write }, + { .name = "PMSWINC_EL0", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .crn = 9, .crm = 12, .opc2 = 4, + .access = PL0_W, .accessfn = pmreg_access_swinc, .type = ARM_CP_NO_RAW, + .writefn = pmswinc_write }, { .name = "PMSELR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 5, .access = PL0_RW, .type = ARM_CP_ALIAS, .fieldoffset = offsetoflow32(CPUARMState, cp15.c9_pmselr), |