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@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, 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(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