81 lines
2.3 KiB
C
81 lines
2.3 KiB
C
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/*
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* Copyright (c) 2006-2022, 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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* 2022-07-15 Emuzit first version
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*/
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#include <rthw.h>
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#include <drivers/pin.h>
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#include "board.h"
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#include "ch56x_pfic.h"
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#include "ch56x_uart.h"
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extern rt_uint32_t rt_thread_switch_interrupt_flag;
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/* FIXME: Use rt_interrupt_leave_hook to trigger SWI for context switch.
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* Hopefully there's a standard riscv way instead of this clumsy patch.
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*/
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static void irq_leave_hook(void)
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{
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if (rt_thread_switch_interrupt_flag)
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{
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pfic_swi_pendset();
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}
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}
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/*
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* _start -> handle_reset
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* src/components.c/entry() -> rtthread_startup()
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* libcpu/risc-v/common/context_gcc.S/rt_hw_interrupt_disable
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*/
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void rt_hw_board_init()
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{
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volatile struct pfic_registers *pfic = (void *)PFIC_REG_BASE;
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/* disable all pfic interrupts */
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pfic->IRER[0] = PFIC_IREG1_MASK;
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pfic->IRER[1] = PFIC_IREG2_MASK;
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/* disable hwstack push/pop & nested interrupt */
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pfic->CFGR = cfgr_nest_hwstk(CFGR_NESTCTRL_DISABLE | CFGR_HWSTKCTRL_DISABLE);
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/* disable clock input for all peripheral devices */
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sys_slp_clk_off0(0xff, SYS_SLP_CLK_OFF);
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sys_slp_clk_off1(0xff, SYS_SLP_CLK_OFF);
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sys_clk_off_by_irqn(ETH_IRQn, SYS_SLP_CLK_OFF);
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sys_clk_off_by_irqn(ECDC_IRQn, SYS_SLP_CLK_OFF);
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/* setup HCLK for systick & peripheral devices */
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sys_hclk_set(SYS_HCLK_FREQ);
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/* set SysTick to RT_TICK_PER_SECOND with current HCLK */
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systick_init(0);
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/* Note: keep MSTATUS_MIE disabled to prevent SysTick from processing
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* thread scheduling, which may not be ready upon 1st systick irq.
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* MSTATUS_MIE will be set when rt_system_scheduler_start() starts
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* the first thread and copies mstatus from stack_frame.
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*/
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#ifdef RT_USING_HEAP
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rt_system_heap_init((void *)HEAP_BEGIN, (void *)HEAP_END);
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#endif
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#ifdef RT_USING_COMPONENTS_INIT
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rt_components_board_init();
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#endif
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#ifdef RT_USING_CONSOLE
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/* console is uart1, TXD1/RXD1 : PA8/PA7 */
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rt_pin_mode(GET_PIN(A, 8), PIN_MODE_OUTPUT);
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rt_pin_mode(GET_PIN(A, 7), PIN_MODE_INPUT_PULLUP);
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rt_hw_uart_init();
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rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
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#endif
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rt_interrupt_leave_sethook(irq_leave_hook);
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}
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