Zhou Rui wrote: > Hi, > Yesterday I tried to compile kernel with linux-2.4.27 and linux-2.6.17 > for PowerPC405EP board. Both of the kernel images were created > successfully, but when I tested them in ram from u-boot with NFS used. > Both of the images could not booted from ram. The two kernel .config > files are attached. > > For the 2.4.27 kernel, after running bootm in u-boot and "Uncompressing > Kernel Image ... OK" printed on the screen. There are > "vector: 200 at pc = c0197d4c, lr = c0197d40 > msr = 1030, sp = c0181fb0 [c0181f00] > current = c0180020, pid = 0, comm = swapper > mon>". > It seemd the booting process had entered a monitor, but I didn't know > what it was. > > For the 2.6.17 kernel, after running bootm in u-boot, the booting > process stops at "Uncompressing Kernel Image ... OK". No other output > after this sentence on the screen. > > Would you like to give some advice about this? Thanks a lot. > > Zhou Rui > Distributed & Embedded System Lab > School of Information Science & Engineering > Lanzhou University, P. R. China > http://dslab.lzu.edu.cn/~zr/
Exception 200 is "Machine Check". If you are getting this on linux start up it is usually due to a double bus fault which is usually due to a memory map problem. Silent boot failures are also often caused by memory map problems... switching from physical memory mapping to virtual (turning on the MMU). gvb
