| /* |
| * Copyright (c) 2021 Arm Limited. All rights reserved. |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| #include "bsp.h" |
| #include "timer.h" |
| |
| #include <assert.h> |
| #include <string.h> |
| |
| #if defined (ARM_NPU) |
| |
| #include "pmu_ethosu.h" |
| |
| /** |
| * @brief Initialises the PMU and enables the cycle counter. |
| **/ |
| static void _init_ethosu_cyclecounter(void); |
| |
| /** |
| * @brief Gets the difference of total NPU cycle counts. |
| * (includes active and idle) |
| * @param[in] st Pointer to time_counter value at start time. |
| * @param[in] end Pointer to time_counter value at end. |
| * @return Total NPU cycle counts difference between the arguments expressed |
| * as unsigned 64 bit integer. |
| **/ |
| static uint64_t bm_get_npu_total_cycle_diff(time_counter *st, |
| time_counter *end); |
| |
| /** |
| * @brief Gets the difference in active NPU cycle counts. |
| * @param[in] st Pointer to time_counter value at start time. |
| * @param[in] end Pointer to time_counter value at end. |
| * @return Active NPU cycle counts difference between the arguments expressed |
| * as unsigned 64 bit integer. |
| **/ |
| static uint64_t bm_get_npu_active_cycle_diff(time_counter *st, |
| time_counter *end); |
| |
| #endif /* defined (ARM_NPU) */ |
| |
| #if defined(MPS3_PLATFORM) |
| /** |
| * @brief Wrapper for getting milliseconds duration between time counters |
| * @param[in] st Pointer to time_counter value at start time. |
| * @param[in] end Pointer to time_counter value at end. |
| * @return Difference in milliseconds between given time counters. |
| **/ |
| static time_t bm_get_duration_ms(time_counter *st, time_counter *end); |
| |
| /** |
| * @brief Wrapper for getting microseconds duration between time counters |
| * @param[in] st Pointer to time_counter value at start time. |
| * @param[in] end Pointer to time_counter value at end. |
| * @return Difference in microseconds between given time counters. |
| **/ |
| static time_t bm_get_duration_us(time_counter *st, time_counter *end); |
| #endif /* defined(MPS3_PLATFORM) */ |
| |
| /** |
| * @brief Wrapper for resetting timer. |
| **/ |
| static void bm_timer_reset(void); |
| |
| /** |
| * @brief Wrapper for getting the current timer counter. |
| * @return Current time counter value. |
| **/ |
| static time_counter bm_get_time_counter(void); |
| |
| /** |
| * @brief Wrapper for profiler start. |
| * @return Current profiler start timer counter. |
| **/ |
| static time_counter bm_start_profiling(void); |
| |
| /** |
| * @brief Wrapper for profiler end. |
| * @return Current profiler end timer counter. |
| **/ |
| static time_counter bm_stop_profiling(void); |
| |
| /** |
| * @brief Wrapper for getting CPU cycle difference between time counters. |
| * @return CPU cycle difference between given time counters expressed |
| * as unsigned 32 bit integer. |
| **/ |
| static uint32_t bm_get_cpu_cycles_diff(time_counter *st, time_counter *end); |
| |
| /** |
| * @brief Initialiser for bare metal timer. |
| * @param[in] timer Platform timer to initialize. |
| **/ |
| void init_timer(platform_timer *timer) |
| { |
| assert(timer); |
| memset(timer, 0, sizeof(*timer)); |
| |
| timer->reset = bm_timer_reset; |
| timer->get_time_counter = bm_get_time_counter; |
| timer->start_profiling = bm_start_profiling; |
| timer->stop_profiling = bm_stop_profiling; |
| timer->get_cpu_cycle_diff = bm_get_cpu_cycles_diff; |
| timer->cap.cpu_cycles = 1; |
| |
| #if defined (MPS3_PLATFORM) |
| timer->cap.duration_ms = 1; |
| timer->cap.duration_us = 1; |
| timer->get_duration_ms = bm_get_duration_ms; |
| timer->get_duration_us = bm_get_duration_us; |
| #endif /* defined (MPS3_PLATFORM) */ |
| |
| #if defined (ARM_NPU) |
| /* We are capable of reporting npu cycle counts. */ |
| timer->cap.npu_cycles = 1; |
| timer->get_npu_total_cycle_diff = bm_get_npu_total_cycle_diff; |
| timer->get_npu_active_cycle_diff = bm_get_npu_active_cycle_diff; |
| _init_ethosu_cyclecounter(); |
| #endif /* defined (ARM_NPU) */ |
| |
| timer->reset(); |
| timer->inited = 1; |
| } |
| |
| #if defined (ARM_NPU) |
| |
| static void _reset_ethosu_counters(void) |
| { |
| /* Reset all cycle and event counters. */ |
| ETHOSU_PMU_CYCCNT_Reset(); |
| ETHOSU_PMU_EVCNTR_ALL_Reset(); |
| } |
| |
| static void _init_ethosu_cyclecounter(void) |
| { |
| /* Reset overflow status. */ |
| ETHOSU_PMU_Set_CNTR_OVS(ETHOSU_PMU_CNT1_Msk | ETHOSU_PMU_CCNT_Msk); |
| |
| /* Set the counter #0 to count idle cycles. */ |
| ETHOSU_PMU_Set_EVTYPER(0, ETHOSU_PMU_NPU_IDLE); |
| |
| /* Enable PMU. */ |
| ETHOSU_PMU_Enable(); |
| |
| /* Enable counters for cycle and counter# 0. */ |
| ETHOSU_PMU_CNTR_Enable(ETHOSU_PMU_CNT1_Msk | ETHOSU_PMU_CCNT_Msk); |
| |
| _reset_ethosu_counters(); |
| } |
| |
| static uint64_t bm_get_npu_total_cycle_diff(time_counter *st, time_counter *end) |
| { |
| return end->npu_total_ccnt - st->npu_total_ccnt; |
| } |
| |
| static uint64_t bm_get_npu_active_cycle_diff(time_counter *st, time_counter *end) |
| { |
| /* Check for overflow: The idle counter is 32 bit while the |
| total cycle count is 64 bit. */ |
| const uint32_t overflow_status = ETHOSU_PMU_Get_CNTR_OVS(); |
| |
| if (ETHOSU_PMU_CNT1_Msk & overflow_status) { |
| printf_err("EthosU PMU idle counter overflow.\n"); |
| return 0; |
| } |
| |
| /* Active NPU time = total time - idle time */ |
| return (bm_get_npu_total_cycle_diff(st, end) + |
| (uint64_t)(st->npu_idle_ccnt)) - (uint64_t)(end->npu_idle_ccnt); |
| } |
| |
| #endif /* defined (ARM_NPU) */ |
| |
| static void bm_timer_reset(void) |
| { |
| #if defined (ARM_NPU) |
| _init_ethosu_cyclecounter(); |
| #endif /* defined (ARM_NPU) */ |
| |
| timer_reset(); |
| } |
| |
| static time_counter bm_get_time_counter(void) |
| { |
| time_counter t = { |
| .counter = get_time_counter(), |
| |
| #if defined (ARM_NPU) |
| .npu_idle_ccnt = ETHOSU_PMU_Get_EVCNTR(0), |
| .npu_total_ccnt = ETHOSU_PMU_Get_CCNTR() |
| #endif /* defined (ARM_NPU) */ |
| |
| }; |
| |
| #if defined (ARM_NPU) |
| debug("NPU total cc: %llu; NPU idle cc: %u\n", |
| t.npu_total_ccnt, t.npu_idle_ccnt); |
| #endif /* defined (ARM_NPU) */ |
| |
| return t; |
| } |
| |
| static time_counter bm_start_profiling(void) |
| { |
| start_cycle_counter(); |
| return bm_get_time_counter(); |
| } |
| |
| static time_counter bm_stop_profiling(void) |
| { |
| stop_cycle_counter(); |
| return bm_get_time_counter(); |
| } |
| |
| static uint32_t bm_get_cpu_cycles_diff(time_counter *st, time_counter *end) |
| { |
| return get_cycle_count_diff(&(st->counter), &(end->counter)); |
| } |
| |
| #if defined(MPS3_PLATFORM) |
| static time_t bm_get_duration_ms(time_counter *st, time_counter *end) |
| { |
| return get_duration_milliseconds(&(st->counter), &(end->counter)); |
| } |
| |
| static time_t bm_get_duration_us(time_counter *st, time_counter *end) |
| { |
| return get_duration_microseconds(&(st->counter), &(end->counter)); |
| } |
| #endif /* defined(MPS3_PLATFORM) */ |