129 lines
2.9 KiB
C
129 lines
2.9 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) 2006 - 2009 RT-Thread Develop Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2006-03-24 Bernard first implementation
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* 2006-05-05 Bernard add DATA_COUNT definition
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* 2006-10-05 Alsor.Z for s3c2410x porting
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* 2007-11-20 Yi.Qiu add lcd,touch,console
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*/
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#include <rtthread.h>
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#include <rthw.h>
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#include "board.h"
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#include "led.h"
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/**
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* @addtogroup mini2440
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*/
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/*@{*/
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#if defined(__CC_ARM)
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extern int Image$$ER_ZI$$ZI$$Base;
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extern int Image$$ER_ZI$$ZI$$Length;
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extern int Image$$ER_ZI$$ZI$$Limit;
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#elif (defined (__GNUC__))
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rt_uint8_t _irq_stack_start[1024];
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rt_uint8_t _fiq_stack_start[1024];
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rt_uint8_t _undefined_stack_start[512];
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rt_uint8_t _abort_stack_start[512];
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rt_uint8_t _svc_stack_start[4096] SECTION(".nobss");
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#endif
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#if defined(__CC_ARM)
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extern int Image$$RW_IRAM1$$ZI$$Limit;
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#define HEAP_BEGIN ((void*)&Image$$RW_IRAM1$$ZI$$Limit)
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#elif defined(__GNUC__)
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extern int __bss_end;
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#define HEAP_BEGIN (((void*)&__bss_end) + 0x1000)
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#endif
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#define HEAP_END (void*)(0x33F00000)
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extern rt_uint32_t PCLK, FCLK, HCLK, UCLK;
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extern void rt_hw_clock_init(void);
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extern void rt_hw_mmu_init(void);
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extern void rt_hw_get_clock(void);
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extern void rt_hw_set_dividor(rt_uint8_t hdivn, rt_uint8_t pdivn);
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extern void rt_hw_set_clock(rt_uint8_t sdiv, rt_uint8_t pdiv, rt_uint8_t mdiv);
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/**
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* This function will handle rtos timer
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*/
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static void rt_timer_handler(int vector, void *param)
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{
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rt_tick_increase();
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}
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/**
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* This function will init timer4 for system ticks
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*/
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static void rt_hw_timer_init(void)
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{
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/* timer4, pre = 15+1 */
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TCFG0 &= 0xffff00ff;
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TCFG0 |= 15 << 8;
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/* all are interrupt mode,set Timer 4 MUX 1/4 */
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TCFG1 &= 0xfff0ffff;
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TCFG1 |= 0x00010000;
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TCNTB4 = (rt_int32_t)(PCLK / (4 *16* RT_TICK_PER_SECOND)) - 1;
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/* manual update */
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TCON = TCON & (~(0x0f<<20)) | (0x02<<20);
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/* install interrupt handler */
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rt_hw_interrupt_install(INTTIMER4, rt_timer_handler, RT_NULL, "tick");
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rt_hw_interrupt_umask(INTTIMER4);
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/* start timer4, reload */
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TCON = TCON & (~(0x0f<<20)) | (0x05<<20);
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}
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/**
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* This function will init s3ceb2410 board
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*/
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void rt_hw_board_init(void)
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{
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rt_hw_cpu_icache_enable();
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rt_hw_cpu_dcache_enable();
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/* init hardware interrupt */
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rt_hw_interrupt_init();
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/* initialize the system clock */
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rt_hw_clock_init();
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/* Get the clock */
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rt_hw_get_clock();
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/* initialize led port */
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rt_hw_led_init();
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/* initialize mmu */
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rt_hw_mmu_init();
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/* initialize timer4 */
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rt_hw_timer_init();
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/* initialize system heap */
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rt_system_heap_init(HEAP_BEGIN, HEAP_END);
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rt_components_board_init();
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#ifdef RT_USING_CONSOLE
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rt_console_set_device("uart0");
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#endif
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}
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/*@}*/
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