diff options
Diffstat (limited to 'source/hal/platform/mps3/source/timer_mps3.c')
| -rw-r--r-- | source/hal/platform/mps3/source/timer_mps3.c | 174 |
1 files changed, 0 insertions, 174 deletions
diff --git a/source/hal/platform/mps3/source/timer_mps3.c b/source/hal/platform/mps3/source/timer_mps3.c deleted file mode 100644 index 6da026f..0000000 --- a/source/hal/platform/mps3/source/timer_mps3.c +++ /dev/null @@ -1,174 +0,0 @@ -/* - * Copyright (c) 2022 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 "timer_mps3.h" - -#include "log_macros.h" -#include "device_mps3.h" -#include "smm_mps3.h" /* Memory map for MPS3. */ - -static uint64_t cpu_cycle_count = 0; /* 64-bit cpu cycle counter */ - -/** - * @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); - -void timer_reset(void) -{ - MPS3_FPGAIO->CLK1HZ = 0; - MPS3_FPGAIO->CLK100HZ = 0; - MPS3_FPGAIO->COUNTER = 0; - - if (0 != Init_SysTick()) { - printf_err("Failed to initialise system tick config\n"); - } - debug("system tick config ready\n"); -} - -base_time_counter get_time_counter(void) -{ - base_time_counter t = { - .counter_1Hz = MPS3_FPGAIO->CLK1HZ, - .counter_100Hz = MPS3_FPGAIO->CLK100HZ, - .counter_fpga = MPS3_FPGAIO->COUNTER, - .counter_systick = Get_SysTick_Cycle_Count() - }; - debug("Timestamp:\n"); - debug("\tCounter 1 Hz: %" PRIu32 "\n", t.counter_1Hz); - debug("\tCounter 100 Hz: %" PRIu32 "\n", t.counter_100Hz); - debug("\tCounter FPGA: %" PRIu32 "\n", t.counter_fpga); - debug("\tCounter CPU: %" PRIu64 "\n", t.counter_systick); - return t; -} - -/** - * Please note, that there are no checks for overflow in this function => if - * the time elapsed has been big (in days) this could happen and is currently - * not handled. - **/ -uint32_t get_duration_milliseconds(base_time_counter *start, - base_time_counter *end) -{ - uint32_t time_elapsed = 0; - if (end->counter_100Hz > start->counter_100Hz) { - time_elapsed = (end->counter_100Hz - start->counter_100Hz) * 10; - } else { - time_elapsed = (end->counter_1Hz - start->counter_1Hz) * 1000 + - ((0xFFFFFFFF - start->counter_100Hz) + end->counter_100Hz + 1) * 10; - } - - /* If the time elapsed is less than 100ms, use microseconds count to be - * more precise */ - if (time_elapsed < 100) { - debug("Using the microsecond function instead..\n"); - return get_duration_microseconds(start, end)/1000; - } - - return time_elapsed; -} - -/** - * Like the microsecond counterpart, this function could return wrong results when - * the counter (MAINCLK) overflows. There are no overflow counters available. - **/ -uint32_t get_duration_microseconds(base_time_counter *start, - base_time_counter *end) -{ - const int divisor = GetMPS3CoreClock()/1000000; - uint32_t time_elapsed = 0; - if (end->counter_fpga > start->counter_fpga) { - time_elapsed = (end->counter_fpga - start->counter_fpga)/divisor; - } else { - time_elapsed = ((0xFFFFFFFF - end->counter_fpga) - + start->counter_fpga + 1)/divisor; - } - return time_elapsed; -} - -uint64_t get_cycle_count_diff(base_time_counter *start, - base_time_counter *end) -{ - if (start->counter_systick > end->counter_systick) { - warn("start > end; counter might have overflown\n"); - } - return end->counter_systick - start->counter_systick; -} - -void start_cycle_counter(void) -{ - /* Nothing to do for FPGA */ -} - -void stop_cycle_counter(void) -{ - /* Nothing to do for FPGA */ -} - -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 = GetMPS3CoreClock()/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; -} |