how to copy barebox to flash?

[Sascha Hauer]

Hi Allen,

On Wed, Sep 25, 2013 at 11:13:47AM -0500, Allen Kennedy Jr. wrote:
> All,
>   How do I copy barebox to flash?
> I have a flash device setup:
>      `---- imx_nand
>           `---- nand0
>                `---- 0x00000000-0x0fffffff: /dev/nand0
>                `---- 0x00000000-0x0001ffff: /dev/bootstrapper
>                `---- 0x00020000-0x0005ffff: /dev/barebox
>                `---- 0x00060000-0x0009ffff: /dev/env_raw
>                `---- 0x00100000-0x005fffff: /dev/kernel
> 
> I used JTAG to load barebox into memory at 0xa0000000
> 
> I just can't figure out how to copy it to flash... There is no DD command...
> I tried this:
> cp 0xa0000000 /dev/barebox 0x4000
> got :
> cp: target `0x4000' is not a directory

What you're looking for is the memcpy command. It has options to copy
memory to/from files. You need something like:

memcpy -d /dev/barebox 0xa0000000 0 512k

replace 512k with whatever filesize is appropriate.

See 'help memcpy' or http://wiki.barebox.org/doku.php?id=commands:memcpy
for more information.

> 
> Seems barebox changed what 'cp' is from the old u-boot way.
> and the nand command only does bad block handling...
> 
> barebox-update seems to be a candidate, but the docs don't make sense
> on how to use.

Yes, that's the correct command, but it needs board support to be
implemented. With the correct board support the update would go down to:

barebox_update /mnt/tftp/barebox.bin

(It needs a file though, you would have to generate this with memcpy if
you want to use it together with a raw memory image.)

> Also I was thinking something like md > /dev/nand, but the output of
> MD is user readable.

Unfortunately the barebox shell is not capable of doing output redirection.

Sascha

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