Can not boot linux-2.4.4 using ppcboot-1.0.4

[Michael Habermann]

At 06:14 AM 9/24/2001 -0700, g.ramakrishna at exgate.tek.com wrote:


>I had already changed the board info in the kernel according to
>include/ppcboot.h
>of ppcboot-1.0.4. It still fails to start the kernel. It stops at "rfi"
>instruction in "turn_on_mmu" in the file "arch/ppc/kernel/head_8xx.S"
>
>         turn_on_mmu:
>           mfmsr   r0
>                 ori     r0,r0,MSR_DR|MSR_IR
>           mtspr   SRR1,r0
>                 lis     r0,start_here at h
>           ori     r0,r0,start_here at l
>                 mtspr   SRR0,r0
>           SYNC
>                 rfi                             /* enables MMU */

After the instruction, the MMU is enabled and the code should continue at
the function 'start_here'. Probably you are single-stepping using MPC8BUG,
which cannot handle the MMU. So the next breakpoint, which is set by
MPC8BUG, will never be reached, because it is set to a physical address.


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