分类: LINUX
2008-04-18 11:45:15
上面已经成功将u-boot移动到s3c44b0上,但板上带的ucos由于使用的是中断方式,所以,在uboot上就不能正常运行,所以,要修改uboot的二级跳转表来实现,在ucos工程中增加一个修改过程。代码如下
void ChangeUbootInt(void)
{
unsigned int address;
//这里是最原始的使用u-boot的中断向量表时的偏移计算
//address = 0xea000000 + ((0x0c008008 - 0x0c000010 - 0x08) >> 2);
/**((volatile unsigned*)0x0c000004) = address;
*((volatile unsigned*)0x0c000008) = address;
*((volatile unsigned*)0x0c00000c) = address;
*((volatile unsigned*)0x0c000010) = address;
*((volatile unsigned*)0x0c000018) = address;
*((volatile unsigned*)0x0c00001c) = address;
*((volatile unsigned*)0x0c000020) = address;
*((volatile unsigned*)0x0c000024) = address;*/
//这里是针对uclinux修改u-boot中断向量后的偏移计算
address = 0xea000000 + ((0x0c008008 - 0x0c000008 - 0x08) >> 2);;
*((volatile unsigned*)0x0c000004) = address;
*((volatile unsigned*)0x0c000008) = address;
*((volatile unsigned*)0x0c00000c) = address;
*((volatile unsigned*)0x0c000010) = address;
*((volatile unsigned*)0x0c000018) = address;
*((volatile unsigned*)0x0c00001c) = address;
*((volatile unsigned*)0x0c000020) = address;
*((volatile unsigned*)0x0c000024) = address;
}
,增加后,uclinux和ucos都可以正常运行,花了我一个星期的时间,下一步,开始研究uclinux移植