MPC8247 Linux boot problem.

[LEO]

Dear all,
I am using ELDK-3.0, and porting the linux-2.4.24 to my MPC8247 board, U-Boot-1.0.2 ran ok. Current problems as follows:

1. If turn on the data cache, the linux kernel can't start up, it  hang when executing follows instruction:
	/* stack */
	addi	r1,r2,TASK_UNION_SIZE
	li	r0,0
	stwu	r0,-STACK_FRAME_OVERHEAD(r1)
in file arch/ppc/kernel/head.S.		
  
2. If turn off the data cache, kernel can run until decompress the ramdisk, then decompress ramdisk failed.
3. The same kernel running ok on my old MPC8250 board.

Expecting your answer and advice, thanks in advance!

Best Regards!