linux-kernel - Re: ARM target not boot after remap memory

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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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