main.c

基于s3c2410、2440的从SD卡引导Linux内核程序

#include "2440addr.h"
#include "Port.h"
#include "Clock_PLL.h"
#include "UART.h"
#include "SD.h"
#include "Fat.h"
#include "PaRAM.h"
#include <string.h>
#include <stdlib.h>


volatile struct
{
	unsigned char Name[8];
	unsigned char Point[1];
	unsigned char Ext[3];
	unsigned char FullName[12];
}Kernel;

//////////////////////////////////////////////////////////
#define	Boot_Linux	1									//
unsigned int	Linux_RunningBase	=	0x30008000;		//
unsigned int	RamDisk_RunningBase	=	0x30800000;		//
unsigned int	Linux_ParamsBase	=	0x30000100;		//
//////////////////////////////////////////////////////////
#define	Boot_Wince	0									//
unsigned int	EBoot_RunningBase	=	0x30038000;		//
unsigned int	WinCE_RunningBase	=	0x30200000;		//
//////////////////////////////////////////////////////////

void Call_OS(unsigned int Zero,unsigned int Machine_Type,unsigned int Kernel_Params_Base,unsigned int RunningBase)
{
	void (*run)(void);
	
	__asm
	{
		MOV	R0,Zero
		MOV	R1,Machine_Type
		MOV	R2,Kernel_Params_Base
	}
	
	run=(void(*)(void))RunningBase;
	run();
}

int main(void)
{
	unsigned int i;
	//char *linuxC;
	
	Port_Init();
	
	ChangeMPllValue(92,1,1);	//200MHz
	ChangeUPllValue(120,2,3);	//48MHz
	Get_cpu_bus_clk();
	
	Uart_Init(115200);			//配置串口0
	
	Uart_Printf(0,"=================================\n");
	Uart_Printf(0,"=                               =\n");
	Uart_Printf(0,"=   This is CANA'S BootLoader.  =\n");
	Uart_Printf(0,"=                               =\n");
	Uart_Printf(0,"=================================\n");
	
	SD_card_init();				//初始化SD卡
	
	if(Fat_Init())				//初始化FAT文件系统
	{
		Uart_Printf(0,"FAT FileSystem is Ready!\n\n");
	}
	else
	{
		Uart_Printf(0,"FAT FileSystem is Bad!!!\n");
		while(1);
	}

#if 1==0
	Uart_Printf(0,"List BootDir.\n");
	DIR();							//列出根目录文件
	Uart_Printf(0,"Enter CANA.\n");
	i=CD((unsigned char *)"CANA");	//进入 CANA 文件夹
	Uart_Printf(0,"List CANA.\n");
	DIR();							//列出 CANA 文件夹里面的文件
	Uart_Printf(0,"Back to BootDir.\n");	
	i=CD((unsigned char *)"..");	//返回上一层，即根目录
	Uart_Printf(0,"List BootDir.\n");
	DIR();							//列出根目录文件
#endif

////////////////////////////////////////////////////////////////////////
//linuxC=ReadCmd((unsigned char *)"CmdLine",(unsigned char *)"ini");
//Uart_Printf(0,"linux command line is: \"%s\"\n\n", linuxC);
//while(1);
////////////////////////////////////////////////////////////////////////

#if	Boot_Linux	
	/////////////////////////////////////////////////////////////
	i=CD((unsigned char *)"Linux");	//进入 Linux 文件夹
	//加载内核
	Uart_Printf(0,"Load Kernel ...\n");
	if(LoadFile((unsigned int *)Linux_RunningBase,(unsigned char *)"zImage",(unsigned char *)"bin"))
	{
		Uart_Printf(0,"Done!\n\n");
	}
	else
	{
		Uart_Printf(0,"Copy Linux Kernel ...... Fail!\nAnd death here!!!\n");
		while(1);
	}
	/////////////////////////////////////////////////////////////
	//加载RAMDISK文件系统
	Uart_Printf(0,"Now,Load FileSystem ...\n");
	if(LoadFile((unsigned int *)RamDisk_RunningBase,(unsigned char *)"RamDisk",(unsigned char *)"img"))
	{
		Uart_Printf(0,"Done!\n\n");
	}
	else
	{
		Uart_Printf(0,"Fail!And death here!!!\n");
		while(1);
	}
	/////////////////////////////////////////////////////////////
	//加载启动参数
	setup_linux_param(Linux_ParamsBase);
	/////////////////////////////////////////////////////////////
	Uart_Printf(0,"Run Kernel ......\n\n");
	Call_OS(0,193,Linux_ParamsBase,Linux_RunningBase);
	/////////////////////////////////////////////////////////////
#endif

#if	Boot_Wince
	/////////////////////////////////////////////////////////////
	Uart_Printf(0,"Now,Load EBoot ...\n");
	if(LoadFile((unsigned int *)(EBoot_RunningBase),(unsigned char *)"EBoot",(unsigned char *)"nb0"))
	{
		Uart_Printf(0,"Done!\n");
	}
	else
	{
		Uart_Printf(0,"Fail!And death here!!!\n");
		while(1);
	}
	/////////////////////////////////////////////////////////////
/*	Uart_Printf(0,"Now,Load WinCE ...\n");
	if(LoadFile((unsigned int *)(WinCE_RunningBase),(unsigned char *)"WinCE",(unsigned char *)"nb0"))
	{
		Uart_Printf(0,"Done!\n");
	}
	else
	{
		Uart_Printf(0,"Fail!And death here!!!\n");
		while(1);
	}*/
	/////////////////////////////////////////////////////////////
	Uart_Printf(0,"Run EBoot ......\n");
	Call_OS(0,193,Linux_ParamsBase,EBoot_RunningBase);
	/////////////////////////////////////////////////////////////
#endif
	
	while(1)
	{
		//rGPBDAT ^= 0x01;
		for(i=0;i<2000;i++);
	}
}