the problem of booting kernel

the problem of booting kernel

[LiuTao]

Hi all:

I am porting Linux to a board which has MPC860MH50, 16M RAM and 2M
Flash.
I am using visionPROBE(emulator of EST) to debug my program.
I download the zImage to the board by emulator, then run it.
I can see the following:

loaded at:     00800000 0080B1C8
board data at: 00800158 00800180
relocated to:  007F0100 007F0128
zimage at:     00830263 0088A2B1
avail ram:     0088B000 01000000

Linux/PPC load:
Uncompressing Linux...done.
Now booting the kernel

Now, I find that the program stoped at 0x111C.

So I set a breakpoint at "blr" in head.S at which the program will jump
to the kernel. I ran the program again, it stoped at the breakpoint.
Then I ran it step by step, I found that it jumped to 0x0000000C, I
think
that's the correct address. Then, I ran it continuously, it stopped at
0x111C again.

That's very strange. If I don't set breakpoint at "blr" but set a
breakpoint
at 0x000C, the program can't stop at the breakpoint but stop at 0x111C.
If I
set breakpoint at "blr" and run it step by step, the program can get
0x000C.

Do you have any suggestions?
Thanks!

LiuTao

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