bootu is for starting raw kernel images. Do you have such an image?
Normally you have an uImage (bootm) or a zImage (bootz)

Ok so that maybe the solution because I didn't tried with the bootm .... my bad ! But why did I don't have the "Bad magic number" error like when I tried the boot command ??? 

Here is the ls /dev result: 

barebox:/ ls /dev/
zero                   defaultenv             mem
nor0                   nand0                  nand_oob0
ram0                   phy0                   self_raw
self0                  env_raw                env0
nor0.barebox           nor0.bareboxenv        nor0.kernel
nor0.root              nand0.barebox          nand0.bareboxenv
nand0.kernel           nand0.root             nand0.root.bb
nand0.kernel.bb        nand0.bareboxenv.bb    nand0.barebox.bb


 
2011/10/17 Sascha Hauer <s.hauer@pengutronix.de>
On Mon, Oct 17, 2011 at 06:03:56PM +0200, Kamel BOUHARA wrote:
> Hi all,
>
> Im working on my own imx27 designed board and wanted to try barebox on
> it.Actually I'm trying it with the phytec board config and it seems to work
> fine booting on my nfs kernel and rootfs.
> But when Im trying to boot from my 128MiB NAND memory then it doesn't work
> and there is no decompression stage from the kernel.
> Here is what Im getting :
>
> Board: Phytec phyCard-i.MX27
> registered netconsole as cs1
> cfi_probe: cfi_flash base: 0xc0000000 size: 0x02000000
> NAND device: Manufacturer ID: 0x2c, Chip ID: 0xac (Micron NAND 512MiB 1,8V
> 8-bit)
> Bad block table found at page 262080, version 0x01
> Bad block table found at page 262016, version 0x01
> Before PHY reset
> After PHY reset
> ULPI Vendor ID 0xffffff92    Product ID 0xffffff92
> No ISP1504 found
> ehci@ehci0: USB EHCI 1.00
> ULPI Vendor ID 0xffffff92    Product ID 0xffffff92
> No ISP1504 found
> ehci@ehci1: USB EHCI 1.00
> Malloc space: 0xa7a00000 -> 0xa7f00000 (size  5 MB)
> Stack space : 0xa79f8000 -> 0xa7a00000 (size 32 kB)
> running /env/bin/init...
>
> Hit any key to stop autoboot:  1
> booting kernel of type uImage from /dev/nand0.kernel.bb
> barebox:/ bootu /dev/nand0.kernel.bb

bootu is for starting raw kernel images. Do you have such an image?
Normally you have an uImage (bootm) or a zImage (bootz)

> commandline: console=ttymxc0,115200 video=imxfb:Chimei-LW700AT9003
> arch_number: 1698
>
> It seems I'm getting some issues with my nand since when I tried to flash it
> and the erase task failed :
>
> erasing partition /dev/nand0.kernel.bb
>
> erase: Invalid argument

Works here. I can't see how erase could return -EINVAL. can you please
post the output of 'ls /dev/nand0*'?

Sascha



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