[Yaffs] Re: YAFFS2 boot loader

[Nick Bane]

Rakhi Rathi wrote:
> Nick, can you please guide me for below listed things.
> 
> Looking forward for positive response from you.....
> 
I was out yesterday till late so I only got your mail this morning.


> Thanks,
> Rakhi
> 
> On 10/19/05, *Rakhi Rathi* <rakhi5511 at gmail.com 
> <mailto:rakhi5511 at gmail.com>> wrote:
> 
>     Thanks Nick.
> 
>     I want to write mkyaffsimage and mkyaffs utility for creating YAFFS2
>     root fs and formatting / programming big/small blocks.  I am
>     clueless how can I do that? Could you please give me some guidance
>     for the same? I will share the code on YAFFS website too.
>
It has been a fair while since I looked at mkyaffsimage so I will leave 
it to others on the list to help there. In principle it is simple, you 
chunk the world up into pages and oob info and write that to a file. You 
should probably read the mkyaffsimage source and be at least slightly 
familiar with it first and then ask some specific questions.

>     I want to do this for my own interest and to take first step to
>     contribute to open source community.
> 
This is best done on the yaffs list so others can contribute and make 
suggestions. I know it is on the todo list for several people and it may 
already have been done. I have cc'd this to the list for comments.

>     Also, could please help me with tar of bootldr35 code.
> 
Use wget 
http://husaberg.toby-churchill.com/releases/development/bootldr/bootldr35

I can tar it up if wget is not helpful to you.

Nick

>     --Rakhi
> 
> 
> 
>     On 10/18/05, *Nick Bane* < nick at cecomputing.co.uk
>     <mailto:nick at cecomputing.co.uk>> wrote:
> 
>         Rakhi Rathi wrote:
>>  Thanks Nick.
>>
>>  I need some more inputs:
>>
>>  NAND flash are shipped with bad blocks; what will happen if
>         you try to
>>  load the bootldr using JTAG in block which is bad initially?
>>
>         Well, we jtag out bootldr into a small bit of NOR and avoid the
>         question
>         entirely.
>         However, reading/writing nand is just a convoluted form of
>         reading/writing NOR so in principle it shouldn't be a problem.
> 
>         A bigger problem is booting out of NAND. Have you solved that
>         one yet?
>         Only the 2k parts do that and one has to hope that the first
>         page won't
>         become bad with time ...
> 
> 
>>  Once again thanks for all your help.
>>
>         Happy to do so.
> 
>         Nick
>