114 lines
1.8 KiB
C
114 lines
1.8 KiB
C
/*
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* Copyright (c) 2006-2019, 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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* 2019-12-04 Jiaxun Yang Initial version
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*/
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/**
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* @addtogroup mipssim
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*/
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/*@{*/
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#include <rtthread.h>
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#include <rthw.h>
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#include "mips_regs.h"
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#include "exception.h"
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#include "drv_uart.h"
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#define CPU_HZ (100 * 1000 * 1000)
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#define RT_HW_HEAP_END (0x80000000 + 64 * 1024 * 1024)
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extern unsigned char __bss_end;
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/**
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* this function will reset CPU
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*
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*/
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void rt_hw_cpu_reset(void)
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{
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rt_kprintf("reboot system...\n");
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while (1);
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}
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/**
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* this function will shutdown CPU
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*
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*/
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void rt_hw_cpu_shutdown(void)
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{
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rt_kprintf("shutdown...\n");
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while (1);
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}
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/**
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* This is the timer interrupt service routine.
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*/
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void rt_hw_timer_handler(void)
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{
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unsigned int count;
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count = read_c0_compare();
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write_c0_compare(count);
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write_c0_count(0);
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/* increase a OS tick */
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rt_tick_increase();
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}
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/**
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* This function will initial OS timer
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*/
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void rt_hw_timer_init(void)
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{
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write_c0_compare(CPU_HZ/2/RT_TICK_PER_SECOND);
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write_c0_count(0);
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mips_unmask_cpu_irq(7);
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}
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/**
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* Board level initialization
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*/
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void rt_hw_board_init(void)
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{
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rt_hw_exception_init();
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/* init hardware interrupt */
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rt_hw_interrupt_init();
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#ifdef RT_USING_FPU
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/* init hardware fpu */
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rt_hw_fpu_init();
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#endif
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#ifdef RT_USING_SERIAL
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/* init hardware UART device */
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rt_hw_uart_init();
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/* set console device */
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rt_console_set_device("uart");
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#endif
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#ifdef RT_USING_HEAP
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rt_system_heap_init((void*)&__bss_end, (void*)RT_HW_HEAP_END);
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#endif
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/* init operating system timer */
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rt_hw_timer_init();
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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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rt_kprintf("Current SR: 0x%08x\n", read_c0_status());
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}
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/*@}*/
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