bootprog.c

YL9200开发板的测试代码,详细请下载后细看

#include "def.h"
#include "config.h"
#include "console.h"
#include "params.h"

#include "slib.h"

void start_kernel( U32 address , U32 initrd )
{
	int i;
	void ( *run ) ( int zero , int arch );

	//set mem=32m console=ttyS0 in 2.4.21, mem=31m console=ttyS4 in 2.4.19
	char* linux_params = "root=/dev/ram rw mem=31m initrd=0x20800000,0x200000 init=/linuxrc console=ttyS0,115200 devfs=mount";
	//char *linux_params = "root=/dev/mtdblock3 mem=32m load_ramdisk=0 init=/linuxrc console=ttyS0,115200 devfs=mount";
	//	char *linux_params = "ramdisk_size=8192 init=/linuxrc console=ttyS0,115200, devfs=mount";
	struct param_struct* params = ( struct param_struct* ) 0x20000100;

	for ( i = 0; i < ( sizeof( struct param_struct ) >> 2 ); i++ )
		( ( U32 * ) params )[i] = 0;
	params->u1.s.page_size = LINUX_PAGE_SIZE;
	params->u1.s.nr_pages = ( 0x2000000 >> LINUX_PAGE_SHIFT );
	for ( i = 0; linux_params[i]; i++ )
		params->commandline[i] = linux_params[i];

	putch( '\n' );
	delay( 10 );

	DisableInt();
	MMU_DisableICache();
	MMU_InvalidateICache();

	run = ( void ( * ) ( int , int ) ) address;
	run( 0 , LINUX_MACHINE_ID );
}