mpc 860 pot linux 2.6 problem

i have ported linux2.6.23 to mpc860t board use cpm smc1 as serial port.
when i boot my kernel with ramdisk i find it stop after print"Loading Ramdisk to 07e20000, end 07fa4100 ... OK"
i paste the logbuf as follow(include some test info),bootargs=/dev/ram rw. if i set the bootargs=console=ttyCPM0,9600 root=/dev/ram rw my kernel stop at the console setup period.
the appendix is the logbuf wiht DEBUG=1
what is wrong? please give me some advice



keng_629
2007-10-13