Opensource ML embedded evaluation kit
Change-Id: I12e807f19f5cacad7cef82572b6dd48252fd61fd
diff --git a/source/application/hal/platforms/bare-metal/timer/baremetal_timer.c b/source/application/hal/platforms/bare-metal/timer/baremetal_timer.c
new file mode 100644
index 0000000..7257c1d
--- /dev/null
+++ b/source/application/hal/platforms/bare-metal/timer/baremetal_timer.c
@@ -0,0 +1,243 @@
+/*
+ * 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) */