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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-07-15 Emuzit first version
*/
#include <rthw.h>
#include <drivers/dev_pin.h>
#include "board.h"
#include "ch56x_pfic.h"
#include "ch56x_uart.h"
extern rt_uint32_t rt_thread_switch_interrupt_flag;
/* FIXME: Use rt_interrupt_leave_hook to trigger SWI for context switch.
* Hopefully there's a standard riscv way instead of this clumsy patch.
*/
static void irq_leave_hook(void)
{
if (rt_thread_switch_interrupt_flag)
{
pfic_swi_pendset();
}
}
/*
* _start -> handle_reset
* src/components.c/entry() -> rtthread_startup()
* libcpu/risc-v/common/context_gcc.S/rt_hw_interrupt_disable
*/
void rt_hw_board_init()
{
volatile struct pfic_registers *pfic = (void *)PFIC_REG_BASE;
/* disable all pfic interrupts */
pfic->IRER[0] = PFIC_IREG1_MASK;
pfic->IRER[1] = PFIC_IREG2_MASK;
/* disable hwstack push/pop & nested interrupt */
pfic->CFGR = cfgr_nest_hwstk(CFGR_NESTCTRL_DISABLE | CFGR_HWSTKCTRL_DISABLE);
/* disable clock input for all peripheral devices */
sys_slp_clk_off0(0xff, SYS_SLP_CLK_OFF);
sys_slp_clk_off1(0xff, SYS_SLP_CLK_OFF);
sys_clk_off_by_irqn(ETH_IRQn, SYS_SLP_CLK_OFF);
sys_clk_off_by_irqn(ECDC_IRQn, SYS_SLP_CLK_OFF);
/* setup HCLK for systick & peripheral devices */
sys_hclk_set(SYS_HCLK_FREQ);
/* set SysTick to RT_TICK_PER_SECOND with current HCLK */
systick_init(0);
/* Note: keep MSTATUS_MIE disabled to prevent SysTick from processing
* thread scheduling, which may not be ready upon 1st systick irq.
* MSTATUS_MIE will be set when rt_system_scheduler_start() starts
* the first thread and copies mstatus from stack_frame.
*/
#ifdef RT_USING_HEAP
rt_system_heap_init((void *)HEAP_BEGIN, (void *)HEAP_END);
#endif
#ifdef RT_USING_COMPONENTS_INIT
rt_components_board_init();
#endif
#ifdef RT_USING_CONSOLE
rt_hw_uart_init();
rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
#endif
rt_interrupt_leave_sethook(irq_leave_hook);
}
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