| /* |
| * SPDX-FileCopyrightText: Copyright 2021-2022 Arm Limited and/or its affiliates <open-source-office@arm.com> |
| * 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 "timer_simple_platform.h" |
| |
| #include "log_macros.h" /* Logging macros. */ |
| #include "RTE_Components.h" /* CPU definitions and functions. */ |
| |
| #include <inttypes.h> |
| |
| static uint64_t cpu_cycle_count = 0; /* 64-bit cpu cycle counter */ |
| extern uint32_t SystemCoreClock; /* Expected to come from the cmsis-device lib */ |
| |
| /** |
| * @brief Gets the system tick triggered cycle counter for the CPU. |
| * @return 64-bit counter value. |
| **/ |
| static uint64_t Get_SysTick_Cycle_Count(void); |
| |
| /** |
| * SysTick initialisation |
| */ |
| static int Init_SysTick(void); |
| |
| /** |
| * @brief Adds one PMU counter to the counters' array |
| * @param value Value of the counter |
| * @param name Name for the given counter |
| * @param unit Unit for the "value" |
| * @param counters Pointer to the counter struct - the one to be populated. |
| * @return true if successfully added, false otherwise |
| */ |
| static bool add_pmu_counter( |
| uint64_t value, |
| const char* name, |
| const char* unit, |
| pmu_counters* counters); |
| |
| void platform_reset_counters(void) |
| { |
| if (0 != Init_SysTick()) { |
| printf_err("Failed to initialise system tick config\n"); |
| return; |
| } |
| |
| #if defined(ARM_NPU) |
| ethosu_pmu_init(); |
| #endif /* defined (ARM_NPU) */ |
| |
| debug("system tick config ready\n"); |
| } |
| |
| void platform_get_counters(pmu_counters* counters) |
| { |
| counters->num_counters = 0; |
| counters->initialised = true; |
| uint32_t i = 0; |
| |
| #if defined (ARM_NPU) |
| ethosu_pmu_counters npu_counters = ethosu_get_pmu_counters(); |
| for (i = 0; i < ETHOSU_PMU_NCOUNTERS; ++i) { |
| add_pmu_counter( |
| npu_counters.npu_evt_counters[i].counter_value, |
| npu_counters.npu_evt_counters[i].name, |
| npu_counters.npu_evt_counters[i].unit, |
| counters); |
| } |
| for (i = 0; i < ETHOSU_DERIVED_NCOUNTERS; ++i) { |
| add_pmu_counter( |
| npu_counters.npu_derived_counters[i].counter_value, |
| npu_counters.npu_derived_counters[i].name, |
| npu_counters.npu_derived_counters[i].unit, |
| counters); |
| } |
| add_pmu_counter( |
| npu_counters.npu_total_ccnt, |
| "NPU TOTAL", |
| "cycles", |
| counters); |
| #else /* defined (ARM_NPU) */ |
| UNUSED(i); |
| #endif /* defined (ARM_NPU) */ |
| |
| #if defined(CPU_PROFILE_ENABLED) |
| add_pmu_counter( |
| Get_SysTick_Cycle_Count(), |
| "CPU TOTAL", |
| "cycles", |
| counters); |
| #endif /* defined(CPU_PROFILE_ENABLED) */ |
| |
| #if !defined(CPU_PROFILE_ENABLED) |
| UNUSED(Get_SysTick_Cycle_Count); |
| #if !defined(ARM_NPU) |
| UNUSED(add_pmu_counter); |
| #endif /* !defined(ARM_NPU) */ |
| #endif /* !defined(CPU_PROFILE_ENABLED) */ |
| } |
| |
| void SysTick_Handler(void) |
| { |
| /* Increment the cycle counter based on load value. */ |
| cpu_cycle_count += SysTick->LOAD + 1; |
| } |
| |
| /** |
| * Gets the current SysTick derived counter value |
| */ |
| static uint64_t Get_SysTick_Cycle_Count(void) |
| { |
| uint32_t systick_val; |
| |
| NVIC_DisableIRQ(SysTick_IRQn); |
| systick_val = SysTick->VAL & SysTick_VAL_CURRENT_Msk; |
| NVIC_EnableIRQ(SysTick_IRQn); |
| |
| return cpu_cycle_count + (SysTick->LOAD - systick_val); |
| } |
| |
| /** |
| * SysTick initialisation |
| */ |
| static int Init_SysTick(void) |
| { |
| const uint32_t ticks_10ms = SystemCoreClock/100 + 1; |
| int err = 0; |
| |
| /* Reset CPU cycle count value. */ |
| cpu_cycle_count = 0; |
| |
| /* Changing configuration for sys tick => guard from being |
| * interrupted. */ |
| NVIC_DisableIRQ(SysTick_IRQn); |
| |
| /* SysTick init - this will enable interrupt too. */ |
| err = SysTick_Config(ticks_10ms); |
| |
| /* Enable interrupt again. */ |
| NVIC_EnableIRQ(SysTick_IRQn); |
| |
| /* Wait for SysTick to kick off */ |
| while (!err && !SysTick->VAL) { |
| __NOP(); |
| } |
| |
| return err; |
| } |
| |
| static bool add_pmu_counter(uint64_t value, |
| const char* name, |
| const char* unit, |
| pmu_counters* counters) |
| { |
| const uint32_t idx = counters->num_counters; |
| if (idx < NUM_PMU_COUNTERS) { |
| counters->counters[idx].value = value; |
| counters->counters[idx].name = name; |
| counters->counters[idx].unit = unit; |
| ++counters->num_counters; |
| return true; |
| } |
| printf_err("Failed to add PMU counter!\n"); |
| return false; |
| } |