booting linux

Baruch Siach baruch at tkos.co.il
Wed Mar 2 05:45:51 EST 2011


Hi Vanalme,

On Wed, Mar 02, 2011 at 11:31:31AM +0100, Vanalme Filip wrote:

[snip]

> Then I do :
> 
> barebox:/ bootz /dev/nand0.kernel.bb
> loaded zImage from /dev/nand0.kernel.bb with size 1777792
> commandline: console=ttymxc0,115200 ip=dhcp root=/dev/mtdblock7 rootfstype=jffs2 mtdparts=mxc_nand:256k(barebox)ro,128k(bareboxenv),5M(kernel),-(root)
> arch_number: 1802
> Uncompressing Linux........................................................................................................................... done, booting the kernel.

If your kernel is recent enough (2.6.33 or newer) try the following:

1. Enable EARLY_PRINTK in your .config

2. Add "earlyprintk" to your bootargs

3. Boot the kernel

Post here what you see.

baruch

> The kernel uncompresses but never starts. Any idea why not ? Does barebox 
> expand the kernel to the right place in SDRAM or do I have to specify that 
> in the bootz command ?
> I think the kernel is never started at all because I don't see any output at all. In this phase, even having a kernel crash would be great... because at least then I would know the kernel has been running for a while... ;-) 
> 
> I guess the image is OK because it uncompresses successfully. Maybe a problem in the bootargs that are passed to the kernel ?
> Should I already have a /dev/mtdblock7 device in barebox's /dev ?
> 
> Maybe useful information :
> 
> barebox:/ printenv
> locals:
> machine=imx27pdk
> ip=dhcp
> kernel_loc=nand
> rootfs_loc=nand
> rootfs_type=jffs2
> rootfsimage=root-jffs2
> kernelimage_type=zimage
> kernelimage=zImage-imx27pdk
> nfsroot=:/path/to/nfs/root
> autoboot_timeout=3
> bootargs=console=ttymxc0,115200
> nand_parts=256k(barebox)ro,128k(bareboxenv),5M(kernel),-(root)
> rootfs_mtdblock_nand=7
> PS1=\e[1;32mbarebox@\e[1;31m\h:\w\e[0m
> bootfile=zImage
> nameserver=10.0.0.44
> domainname=televic.com
> globals:
> PATH=/env/bin
> barebox:/
> 
> Filip

-- 
                                                     ~. .~   Tk Open Systems
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   - baruch at tkos.co.il - tel: +972.2.679.5364, http://www.tkos.co.il -



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