#include "s3c2410.h"/* SDRAM 13個寄存器的值 */ unsigned long  const	mem_cfg_val[]={	0x22111110,		//BWSCON					0x00000700,		//BANKCON0					0x00000700,		//BANKCON1					0x00000700,		//BANKCON2					0x00000700,		//BANKCON3						0x00000700,		//BANKCON4					0x00000700,		//BANKCON5					0x00018005,		//BANKCON6					0x00018005,		//BANKCON7					0x008e07a3,		//REFRESH					0x000000b2,		//BANKSIZE					0x00000030,		//MRSRB6					0x00000030,		//MRSRB7					 }; void disable_watch_dog();void memsetup();void reset_nand();void init_nand();inline void wait_idle(void);void nand_read_ll(unsigned char *buf, unsigned long start_addr, int size);void init_uart();/*上電后，WATCH DOG默認是開著的，要把它關掉 */void disable_watch_dog(){	WTCON	= 0;}/* 設置控制SDRAM的13個寄存器 */void memsetup(){	int 	i = 0;	unsigned long *p = (unsigned long *)MEM_CTL_BASE;	for(; i < 13; i++)		p[i] = mem_cfg_val[i];}/* 在第一次實用NAND Flash前，復位一下NAND Flash */void reset_nand(){	int i=0;	NFCONF &= ~0x800;    	for(; i<10; i++);	NFCMD = 0xff;	//reset command	wait_idle();}/* 初始化NAND Flash */void init_nand(){	NFCONF = 0xf830;	reset_nand();}/**************************************************************************	以下讀NAND Flash的代碼來自mizi公司的bootloader vivi*************************************************************************/#define BUSY 1inline void wait_idle(void) {    int i;    while(!(NFSTAT & BUSY))      for(i=0; i<10; i++);}#define NAND_SECTOR_SIZE	512#define NAND_BLOCK_MASK		(NAND_SECTOR_SIZE - 1)/* low level nand read function */void nand_read_ll(unsigned char *buf, unsigned long start_addr, int size){    int i, j;    if ((start_addr & NAND_BLOCK_MASK) || (size & NAND_BLOCK_MASK)) {        return ;	/* invalid alignment */    }    /* chip Enable */    NFCONF &= ~0x800;    for(i=0; i<10; i++);    for(i=start_addr; i < (start_addr + size);) {      /* READ0 */      NFCMD = 0;      /* Write Address */      NFADDR = i & 0xff;      NFADDR = (i >> 9) & 0xff;      NFADDR = (i >> 17) & 0xff;      NFADDR = (i >> 25) & 0xff;      wait_idle();      for(j=0; j < NAND_SECTOR_SIZE; j++, i++) {	*buf = (NFDATA & 0xff);	buf++;      }    }    /* chip Disable */    NFCONF |= 0x800;	/* chip disable */    return ;}#define EINT1		(2<<(1*2))#define EINT2		(2<<(2*2))#define EINT3		(2<<(3*2))#define EINT7		(2<<(7*2))void init_irq( ){	GPFCON |= EINT1 | EINT2 | EINT3 | EINT7;	GPFUP	 |= (1<<1) | (1<<2) | (1<<3) | (1<<7);		EINTMASK &= (~0x80);	//EINT7使能	INTMSK	&= (~0x1e);	//EINT1-3、EINT7使能	PRIORITY &= (~0x03);	//設定優先級}