65ffe4e13e
The changes unify the tick.c implementations for all risc-v64 architectures, leveraging the CPUTIME feature. This refactoring was necessary to streamline the codebase, and ensure consistent timer handling across different platforms. Changes: - Updated `Kconfig` in `bsp/cvitek/cv18xx_risc-v` to fix formatting issues. - Updated .config for BSPs to update `CPUTIME_TIMER_FREQ` - Updated header of for API `riscv_cputime_init` - Initialized riscv timer on `rt_hw_tick_init` - Refactored `tick.c` and `tick.h` in `libcpu/risc-v/t-head/c906` and `libcpu/risc-v/virt64`: - Replaced direct use of `rdtime` with `clock_cpu_gettime`. - Removed redundant timer frequency definitions. - Added static assertions to check the value of `CPUTIME_TIMER_FREQ`. - Initialized `tick_cycles` based on `CPUTIME_TIMER_FREQ`. - Integrated `ktime` support for tick initialization. Signed-off-by: Shell <smokewood@qq.com> Reviewed-on: https://github.com/RT-Thread/rt-thread/pull/9164 Reviewed-by: Chen Wang <unicorn_wang@outlook.com>
77 lines
1.6 KiB
C
77 lines
1.6 KiB
C
/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2018/10/28 Bernard The unify RISC-V porting code.
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* 2024/07/08 Shell Using CPUTIME as tick
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*/
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#include <rthw.h>
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#include <rtthread.h>
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#include <drivers/cputime.h>
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#include <encoding.h>
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#include "sbi.h"
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#ifdef RT_USING_KTIME
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#include <ktime.h>
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#endif
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static volatile unsigned long tick_cycles = 0;
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int tick_isr(void)
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{
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rt_tick_increase();
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sbi_set_timer(clock_cpu_gettime() + tick_cycles);
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return 0;
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}
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/* BSP should config clockbase frequency */
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RT_STATIC_ASSERT(defined_clockbase_freq, CPUTIME_TIMER_FREQ != 0);
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/* Sets and enable the timer interrupt */
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int rt_hw_tick_init(void)
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{
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/* calculate the tick cycles */
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tick_cycles = CPUTIME_TIMER_FREQ / RT_TICK_PER_SECOND;
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/* Clear the Supervisor-Timer bit in SIE */
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clear_csr(sie, SIP_STIP);
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/* Init riscv timer */
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riscv_cputime_init();
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/* Set timer */
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sbi_set_timer(clock_cpu_gettime() + tick_cycles);
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#ifdef RT_USING_KTIME
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rt_ktime_cputimer_init();
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#endif
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/* Enable the Supervisor-Timer bit in SIE */
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set_csr(sie, SIP_STIP);
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return 0;
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}
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/**
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* This function will delay for some us.
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*
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* @param us the delay time of us
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*/
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void rt_hw_us_delay(rt_uint32_t us)
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{
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unsigned long start_time;
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unsigned long end_time;
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unsigned long run_time;
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start_time = clock_cpu_gettime();
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end_time = start_time + us * (CPUTIME_TIMER_FREQ / 1000000);
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do
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{
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run_time = clock_cpu_gettime();
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} while(run_time < end_time);
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}
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