[kernel boot] - Failed to boot the kernel building by myself. Could you please help on it?

[Tim Jiang]

I found the workaround for my problem by google search.
It said that "kernel unaligned accesses" caused this problem. And now with
the suggestion, I can boot my kernel.

Could somebody explain more for me? Thanks in advance.

I followed the suggestion change arch/arm/kernel/head.S:
@@ -394,7 +394,7 @@ __secondary_data:
  *  r13 = **virtual** address to jump to upon completion
  */
__enable_mmu:
-#ifdef CONFIG_ALIGNMENT_TRAP
+#if defined(CONFIG_ALIGNMENT_TRAP) && __LINUX_ARM_*ARCH*__ < 6
orr r0, r0, #CR_A
#else
bic r0, r0, #CR_A
Why is "bic r0, r0, #CR_A" OK for kernel?




On Mon, May 28, 2012 at 5:38 PM, Tim Jiang <tim.jiang.linaro at gmail.com>wrote:

> Hi Experts,
>
> I am a newbie in Linaro development.
> The kernel built by myself can't boot up. Could you please help on it?
> Thanks a lot in advance.
>
> # Proglem:
> There was no any response after following logs:
>
> Starting kernel ...
> Uncompressing Linux... done, booting the kernel.
>
>
>
> *Followings are details:*
>
> # My setting:
> Development board - i.Mx53 QSB
> Host PC - Ubuntu 10.04 x64
> GCC for build linaro kernel - version is 4.6.2
> Create a micro-SD card with linaro Nano 12.02. I used,
> mx53loco-nano.img.gz<http://releases.linaro.org/12.02/ubuntu/oneiric-images/nano/mx53loco-nano.img.gz>,
> to create the disc and it can work well and I can run my program in this
> Nano linaro.
>
> # What I want:
> I wanted to build a kernel to replace the kernel installed with linaro
> Naro 12.02.
>
> # My steps:
> 1) Download the kernel source code:
>     I downloaded the code under the linaro 12.02 download page(
> http://www.linaro.org/downloads/1202), linux-linaro-lt-freescale<http://launchpad.net/linaro-landing-team-freescale>(supplied
> by landing team).
> 2) Build the kernel:
>     I copied the configuration file from micor-SD card,
> /media/rootfs/config-3.1.0-1002-linaro-It-mx5, and rename it to .config.
>     $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- uImage
>     $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- modules
> 3) Install kernel to micro-SD card:
>     $ cp arch/arm/boot/uImage /media/boot
>     $ make ARCH=arm INSTALL_MOD_PATH=/media/rootfs modules_install
>     $ sudo umount /media/*
> 4) Boot with my own kernel:
>     Install the micro-SD card and press power button.
>
> # Result:
> There was no any response after following logs:
>
> Starting kernel ...
> Uncompressing Linux... done, booting the kernel.
>
>
> I have tried several other version kernel code and even update u-boot, but
> failed to fix it.
> Could somebody show me suggestion on it?
>
>
> Best Regards,
> Tim
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.linaro.org/pipermail/linaro-kernel/attachments/20120529/a99176ab/attachment.html>