alexander | 3c79893 | 2021-03-26 21:42:19 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2021 Arm Limited. All rights reserved. |
| 3 | * SPDX-License-Identifier: Apache-2.0 |
| 4 | * |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | * you may not use this file except in compliance with the License. |
| 7 | * You may obtain a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | */ |
| 17 | #include "bsp.h" |
| 18 | #include "timer.h" |
| 19 | |
| 20 | #include <assert.h> |
| 21 | #include <string.h> |
| 22 | |
| 23 | #if defined (ARM_NPU) |
| 24 | |
| 25 | #include "pmu_ethosu.h" |
| 26 | |
| 27 | /** |
| 28 | * @brief Initialises the PMU and enables the cycle counter. |
| 29 | **/ |
| 30 | static void _init_ethosu_cyclecounter(void); |
| 31 | |
| 32 | /** |
| 33 | * @brief Gets the difference of total NPU cycle counts. |
| 34 | * (includes active and idle) |
| 35 | * @param[in] st Pointer to time_counter value at start time. |
| 36 | * @param[in] end Pointer to time_counter value at end. |
| 37 | * @return Total NPU cycle counts difference between the arguments expressed |
| 38 | * as unsigned 64 bit integer. |
| 39 | **/ |
| 40 | static uint64_t bm_get_npu_total_cycle_diff(time_counter *st, |
| 41 | time_counter *end); |
| 42 | |
| 43 | /** |
| 44 | * @brief Gets the difference in active NPU cycle counts. |
| 45 | * @param[in] st Pointer to time_counter value at start time. |
| 46 | * @param[in] end Pointer to time_counter value at end. |
| 47 | * @return Active NPU cycle counts difference between the arguments expressed |
| 48 | * as unsigned 64 bit integer. |
| 49 | **/ |
| 50 | static uint64_t bm_get_npu_active_cycle_diff(time_counter *st, |
| 51 | time_counter *end); |
| 52 | |
| 53 | #endif /* defined (ARM_NPU) */ |
| 54 | |
| 55 | #if defined(MPS3_PLATFORM) |
| 56 | /** |
| 57 | * @brief Wrapper for getting milliseconds duration between time counters |
| 58 | * @param[in] st Pointer to time_counter value at start time. |
| 59 | * @param[in] end Pointer to time_counter value at end. |
| 60 | * @return Difference in milliseconds between given time counters. |
| 61 | **/ |
| 62 | static time_t bm_get_duration_ms(time_counter *st, time_counter *end); |
| 63 | |
| 64 | /** |
| 65 | * @brief Wrapper for getting microseconds duration between time counters |
| 66 | * @param[in] st Pointer to time_counter value at start time. |
| 67 | * @param[in] end Pointer to time_counter value at end. |
| 68 | * @return Difference in microseconds between given time counters. |
| 69 | **/ |
| 70 | static time_t bm_get_duration_us(time_counter *st, time_counter *end); |
| 71 | #endif /* defined(MPS3_PLATFORM) */ |
| 72 | |
| 73 | /** |
| 74 | * @brief Wrapper for resetting timer. |
| 75 | **/ |
| 76 | static void bm_timer_reset(void); |
| 77 | |
| 78 | /** |
| 79 | * @brief Wrapper for getting the current timer counter. |
| 80 | * @return Current time counter value. |
| 81 | **/ |
| 82 | static time_counter bm_get_time_counter(void); |
| 83 | |
| 84 | /** |
| 85 | * @brief Wrapper for profiler start. |
| 86 | * @return Current profiler start timer counter. |
| 87 | **/ |
| 88 | static time_counter bm_start_profiling(void); |
| 89 | |
| 90 | /** |
| 91 | * @brief Wrapper for profiler end. |
| 92 | * @return Current profiler end timer counter. |
| 93 | **/ |
| 94 | static time_counter bm_stop_profiling(void); |
| 95 | |
| 96 | /** |
| 97 | * @brief Wrapper for getting CPU cycle difference between time counters. |
| 98 | * @return CPU cycle difference between given time counters expressed |
| 99 | * as unsigned 32 bit integer. |
| 100 | **/ |
| 101 | static uint32_t bm_get_cpu_cycles_diff(time_counter *st, time_counter *end); |
| 102 | |
| 103 | /** |
| 104 | * @brief Initialiser for bare metal timer. |
| 105 | * @param[in] timer Platform timer to initialize. |
| 106 | **/ |
| 107 | void init_timer(platform_timer *timer) |
| 108 | { |
| 109 | assert(timer); |
| 110 | memset(timer, 0, sizeof(*timer)); |
| 111 | |
| 112 | timer->reset = bm_timer_reset; |
| 113 | timer->get_time_counter = bm_get_time_counter; |
| 114 | timer->start_profiling = bm_start_profiling; |
| 115 | timer->stop_profiling = bm_stop_profiling; |
| 116 | timer->get_cpu_cycle_diff = bm_get_cpu_cycles_diff; |
| 117 | timer->cap.cpu_cycles = 1; |
| 118 | |
| 119 | #if defined (MPS3_PLATFORM) |
| 120 | timer->cap.duration_ms = 1; |
| 121 | timer->cap.duration_us = 1; |
| 122 | timer->get_duration_ms = bm_get_duration_ms; |
| 123 | timer->get_duration_us = bm_get_duration_us; |
| 124 | #endif /* defined (MPS3_PLATFORM) */ |
| 125 | |
| 126 | #if defined (ARM_NPU) |
| 127 | /* We are capable of reporting npu cycle counts. */ |
| 128 | timer->cap.npu_cycles = 1; |
| 129 | timer->get_npu_total_cycle_diff = bm_get_npu_total_cycle_diff; |
| 130 | timer->get_npu_active_cycle_diff = bm_get_npu_active_cycle_diff; |
| 131 | _init_ethosu_cyclecounter(); |
| 132 | #endif /* defined (ARM_NPU) */ |
| 133 | |
| 134 | timer->reset(); |
| 135 | timer->inited = 1; |
| 136 | } |
| 137 | |
| 138 | #if defined (ARM_NPU) |
| 139 | |
| 140 | static void _reset_ethosu_counters(void) |
| 141 | { |
| 142 | /* Reset all cycle and event counters. */ |
| 143 | ETHOSU_PMU_CYCCNT_Reset(); |
| 144 | ETHOSU_PMU_EVCNTR_ALL_Reset(); |
| 145 | } |
| 146 | |
| 147 | static void _init_ethosu_cyclecounter(void) |
| 148 | { |
| 149 | /* Reset overflow status. */ |
| 150 | ETHOSU_PMU_Set_CNTR_OVS(ETHOSU_PMU_CNT1_Msk | ETHOSU_PMU_CCNT_Msk); |
| 151 | |
| 152 | /* Set the counter #0 to count idle cycles. */ |
| 153 | ETHOSU_PMU_Set_EVTYPER(0, ETHOSU_PMU_NPU_IDLE); |
| 154 | |
| 155 | /* Enable PMU. */ |
| 156 | ETHOSU_PMU_Enable(); |
| 157 | |
| 158 | /* Enable counters for cycle and counter# 0. */ |
| 159 | ETHOSU_PMU_CNTR_Enable(ETHOSU_PMU_CNT1_Msk | ETHOSU_PMU_CCNT_Msk); |
| 160 | |
| 161 | _reset_ethosu_counters(); |
| 162 | } |
| 163 | |
| 164 | static uint64_t bm_get_npu_total_cycle_diff(time_counter *st, time_counter *end) |
| 165 | { |
| 166 | return end->npu_total_ccnt - st->npu_total_ccnt; |
| 167 | } |
| 168 | |
| 169 | static uint64_t bm_get_npu_active_cycle_diff(time_counter *st, time_counter *end) |
| 170 | { |
| 171 | /* Check for overflow: The idle counter is 32 bit while the |
| 172 | total cycle count is 64 bit. */ |
| 173 | const uint32_t overflow_status = ETHOSU_PMU_Get_CNTR_OVS(); |
| 174 | |
| 175 | if (ETHOSU_PMU_CNT1_Msk & overflow_status) { |
| 176 | printf_err("EthosU PMU idle counter overflow.\n"); |
| 177 | return 0; |
| 178 | } |
| 179 | |
| 180 | /* Active NPU time = total time - idle time */ |
| 181 | return (bm_get_npu_total_cycle_diff(st, end) + |
| 182 | (uint64_t)(st->npu_idle_ccnt)) - (uint64_t)(end->npu_idle_ccnt); |
| 183 | } |
| 184 | |
| 185 | #endif /* defined (ARM_NPU) */ |
| 186 | |
| 187 | static void bm_timer_reset(void) |
| 188 | { |
| 189 | #if defined (ARM_NPU) |
| 190 | _init_ethosu_cyclecounter(); |
| 191 | #endif /* defined (ARM_NPU) */ |
| 192 | |
| 193 | timer_reset(); |
| 194 | } |
| 195 | |
| 196 | static time_counter bm_get_time_counter(void) |
| 197 | { |
| 198 | time_counter t = { |
| 199 | .counter = get_time_counter(), |
| 200 | |
| 201 | #if defined (ARM_NPU) |
| 202 | .npu_idle_ccnt = ETHOSU_PMU_Get_EVCNTR(0), |
| 203 | .npu_total_ccnt = ETHOSU_PMU_Get_CCNTR() |
| 204 | #endif /* defined (ARM_NPU) */ |
| 205 | |
| 206 | }; |
| 207 | |
| 208 | #if defined (ARM_NPU) |
| 209 | debug("NPU total cc: %llu; NPU idle cc: %u\n", |
| 210 | t.npu_total_ccnt, t.npu_idle_ccnt); |
| 211 | #endif /* defined (ARM_NPU) */ |
| 212 | |
| 213 | return t; |
| 214 | } |
| 215 | |
| 216 | static time_counter bm_start_profiling(void) |
| 217 | { |
| 218 | start_cycle_counter(); |
| 219 | return bm_get_time_counter(); |
| 220 | } |
| 221 | |
| 222 | static time_counter bm_stop_profiling(void) |
| 223 | { |
| 224 | stop_cycle_counter(); |
| 225 | return bm_get_time_counter(); |
| 226 | } |
| 227 | |
| 228 | static uint32_t bm_get_cpu_cycles_diff(time_counter *st, time_counter *end) |
| 229 | { |
| 230 | return get_cycle_count_diff(&(st->counter), &(end->counter)); |
| 231 | } |
| 232 | |
| 233 | #if defined(MPS3_PLATFORM) |
| 234 | static time_t bm_get_duration_ms(time_counter *st, time_counter *end) |
| 235 | { |
| 236 | return get_duration_milliseconds(&(st->counter), &(end->counter)); |
| 237 | } |
| 238 | |
| 239 | static time_t bm_get_duration_us(time_counter *st, time_counter *end) |
| 240 | { |
| 241 | return get_duration_microseconds(&(st->counter), &(end->counter)); |
| 242 | } |
| 243 | #endif /* defined(MPS3_PLATFORM) */ |