118 lines
3.2 KiB
C
118 lines
3.2 KiB
C
/*
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* File : board.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2017, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2017-5-30 Bernard the first version
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*/
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#include <rthw.h>
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#include <rtthread.h>
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#include "board.h"
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#include "drv_uart.h"
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#include "interrupt.h"
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#include "mmu.h"
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static void os_clock_irq_handle(int irqno, void *param)
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{
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volatile rt_uint32_t *temp_addr = (rt_uint32_t *)(0x01C20C00 + 0x04);
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/* clear timer */
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*temp_addr |= 0x01;
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rt_tick_increase();
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}
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static void mmu_init(void)
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{
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struct mem_desc r6_mem_desc[] =
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{
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{ 0x00000000, 0xFFFFFFFF, 0x00000000, RW_NCNB }, /* None cached for 4G memory */
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{ 0x80000000, 0x82000000 - 1, 0x80000000, RW_CB }, /* 32M cached SDRAM memory */
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//{ 0x00000000, 0x00001000-1, 0x80000000, RW_CB }, /* isr vector table */
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//here not set mmu
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//start_gcc.S Copy vector to the correct address
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};
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rt_hw_mmu_init(r6_mem_desc, sizeof(r6_mem_desc) / sizeof(r6_mem_desc[0]));
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}
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static void os_clock_init(void)
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{
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rt_uint32_t temp;
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volatile rt_uint32_t *temp_addr;
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/* reload value */
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temp = 0xB71B00 / RT_TICK_PER_SECOND;
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temp_addr = (rt_uint32_t *)(0x01C20C00 + 0x14);
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*temp_addr = temp;
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/* continuous | /2 | 24Mhz | reload*/
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temp = (0x00 << 7) | (0x01 << 4) | (0x01 << 2) | (0x00 << 1);
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temp_addr = (rt_uint32_t *)(0x01C20C00 + 0x10);
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*temp_addr &= 0xffffff00;
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*temp_addr |= temp;
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/* open timer irq */
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temp = 0x01 << 0;
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temp_addr = (rt_uint32_t *)(0x01C20C00);
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*temp_addr |= temp;
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/* set init value */
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temp_addr = (rt_uint32_t *)(0x01C20C00 + 0x18);
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*temp_addr = 0;
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/* begin run timer */
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temp = 0x01 << 0;
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temp_addr = (rt_uint32_t *)(0x01C20C00 + 0x10);
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*temp_addr |= temp;
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temp_addr = (rt_uint32_t *)(0x01C20C00);
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/* set irq handle */
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rt_hw_interrupt_install(TIMER0_INTERRUPT, os_clock_irq_handle, (void *)temp_addr, "timer");
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rt_hw_interrupt_umask(TIMER0_INTERRUPT);
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}
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void rt_hw_board_init(void)
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{
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mmu_init();
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rt_hw_interrupt_init();
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#ifdef RT_USING_HEAP
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/* init memory system */
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rt_system_heap_init(RT_HW_HEAP_BEGIN, RT_HW_HEAP_END);
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#endif
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/* init hardware interrupt */
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rt_hw_uart_init();
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#ifdef RT_USING_CONSOLE
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/* set console device */
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rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
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#endif /* RT_USING_CONSOLE */
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os_clock_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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}
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