RE: Bootldr problems fixed

Hi Guylhem,

See below

Walter
> -----Original Message-----
> From: Guylhem Aznar [mailto:[email protected]]
> Sent: Thursday, July 29, 2004 1:18 AM
> To: Nils Faerber
> Cc: Schweizer Walter; Florian Boor; Simpad List
> Subject: Re: [Simpad-general] Bootldr problems fixed
> 
> 
> On Wed, Jul 28, 2004 at 08:58:11PM +0200, Nils Faerber wrote:
> > > Yes, the bootldr now runs only on Simpads with 32MB Flash.
> > > Maybe it works on the Simpads with only 16 MB but it will still
> > > assume 32 MB and fail while flashing.
> 
> This can be corrected at compile time - I guess it is a simple problem
> of #ifdef since latest one worked with 16M.

Yes, it is a compile time option. Undefine the IPCOM stuff and you get a
Bootldr for 16 MB Flash. It would be nice to autodetect the Flash though.

> 
> > > You create the JFFS2 image with mkfs.jffs2
> > 
> > What is the exact eraseblocksize that should be used with 
> the used intel
> > flash chips? Is it 256k?
> 

The blocksize is 128K = 0x20000.

> Here I run :
> mkfs.jffs2 --output root-jffs2.flash --root ./root/ 
> --pad=0xd80000 --eraseblock=0x20000
> 
> Problem is the root-jffs2.flash is *not* accepted by the simpad -
> serload submits a download request, but it never even downloads.
> This happens with 2.5.3 and regardless of which serload (win or linux)
> or the reset sequence (reset, reset+enter) - I tried every combination
> of the above, so until I got that fixed I guess my efforts to create a
> jffs2 image for the new kernel will be futile.

Bootloader 2.5.3 accepts only files with the correct header.
That is created with "gen_boot".
You cannot flash the rootdisk only. You have concatenate the kernel and
the jffs to one large image. See the "dd" tricks how to do this.

Bootldr is different! 

> 
> The strangest thing is the kernel created by the following 
> script is accepted:
> 
> cp zImage /tmp/$$.tmp ||  exit 1
> set X`ls -l /tmp/$$.tmp`
> filelen=$5
> loader_start="0xc0208000"
> loader_entry="0xc0208000"
> echo "File: kernel.toflash Exec: $loader_entry $filelen "
> ./gen_boot -d3 $loader_entry 1 $loader_start $filelen >bheader
> cat bheader /tmp/$$.tmp  >kernel.flash
> rm -f /tmp/$$.tmp bheader
> exit 0
> 
> I am certainly missing something very simple. The abdsence of gen_boot
> and loader_start in mkfs.jffs2 bothers me.
> 
> Bien à vous - Best regards,
> Guylhem P. Aznar
> 
> -- 
> *@externe.net                                            
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