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Message-ID: <4C8E1417.4060204@compulab.co.il>
Date: Mon, 13 Sep 2010 14:07:51 +0200
From: Mike Rapoport <mike@...pulab.co.il>
To: Robin Theunis <robint91@...il.com>
CC: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
linux-embedded mailing list <linux-embedded@...r.kernel.org>,
LAKML <linux-arm-kernel@...ts.infradead.org>
Subject: Re: ARM target not boot after remap memory
(add LAKLM to CC)
Robin Theunis wrote:
> Dear (Embedded)-Kernel-Devs,
>
> I'm trying to build linux 2.6.34.1 for a AT91RM9200 target. The whole
> build process is successful because I get correct kernel images and
> also a uImage for U-boot.
> The U-boot version is 2010.08. I have build the whole system on a
> 64bit ubuntu machine. I use the latest buildroot to make the toolchain
> and etc. At this moment I have a
> openocd jtag dongle connected to my target for debug sessions.
> I have check that the machine id/type are correct. I have gotten those
> error messages of a unsupported target. I have resolved those errors.
> The target is self is a AT91RM9200 with 64MiB ram and 16MiB cfi flash.
> The boot args of u-boot are "console=ttyS0,115200n8
> root=/dev/mtdblock0 rootfstype=jffs2 mem=64M".
>
> The problem is now when linux kernel is booting, nothing happens.
>
> ---
> U-Boot> bootm
> ## Booting kernel from Legacy Image at 21000000 ...
> Image Name: Linux-2.6.34.1robin9200v1.0
> Image Type: ARM Linux Kernel Image (uncompressed)
> Data Size: 1811796 Bytes = 1.7 MiB
> Load Address: 20008000
> Entry Point: 20008000
> Verifying Checksum ... OK
> Loading Kernel Image ... OK
> OK
>
> Starting kernel ...
>
> Uncompressing Linux... done, booting the kernel.
> ---
>
> Here is stalls. With my jtag probe I can locate the problem.
>
> ---
>> halt
> target state: halted
> target halted in ARM state due to debug-request, current mode: Supervisor
> cpsr: 0x600000d3 pc: 0xc000af3c
> MMU: enabled, D-Cache: enabled, I-Cache: enabled
>> arm disassemble 0xc000af3c
> 0xc000af3c 0xeafffffe B 0xc000af3c
> ---
>
> This just loops at that address. Why does it that?
> You see that the mmu is enabled and the cpu has remapped the memory.
> Does someone have a clue what goes wrong?
>
> Here is the .config and board file.
> http://www.on8rth.be/wp-content/uploads/2010/09/dotconfig.txt
> http://www.on8rth.be/wp-content/uploads/2010/09/board-robin9200.c
>
> Thank you
>
> Robin Theunis
> ON8RTH
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--
Sincerely yours,
Mike.
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