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