[ECOS] Legacy Flash implementation

[Rutger Hofman]

Rutger Hofman wrote:
> Ahum. I guess I had forgotten this now, but it appears that Flash v2 
> (including legacy API) requires CVS branch flash_v2 in the checkout. 
> Having a different branch is entirely consistent with my problems.

OK, it's trivial to get -r flash_v2_tag. But this effectively gives me 
an eCos CVS snapshot from 2004, with patches *only* to the flash 
modules. I would very much prefer to be in sync with the main eCos CVS 
trunk and still have flash_v2 -- I want the newer i2c, for example.

I think there are a number of different solutions to this:

1) eCos maintainers merge the flash v2 branch into the main trunk. This 
would be perfect.

2) I myself merge the v2 branch into my checkout of the main trunk. I 
attempted this, and it gives me a number of conflicts, especially in 
redboot flash.c. The conflicts are caused by 2 additions in the main 
trunk to redboot flash.c: REDBOOT_FLASH_REVERSE_BYTEORDER and 
CYGOPT_REDBOOT_REDUNDANT_FIS. Addition of an 'ls' command apparently is 
handled seemlessly by CVS. Mostly, the conflict resolution in redboot 
flash.c seems to be straightforward, but a few difficult sites reaain. 
Also, as things are with CVS, there may be invisible conflicts: both 
parent branches may have added code in different places, but the 
additions are inconsistent. For the rest of the tree, of course the same 
holds, but my feeling is that the merge is painless, because it's very 
much localized.
Now, I don't build redboot, I build eCos applications. So any remaining 
errors in redboot flash.c are not going to bite me, right? But it still 
feels unsatisfactory to have a checkout that may be broken in redboot.
The obvious downside of this approach is that I will have a conflict 
each time anything related to flash is changed in the repository. This 
is not so very attractive!

Rutger Hofman
VU Amsterdam

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