Re: [ECOS] Redboot driver vs eCos driver

[Jonathan Larmour <jlarmour at redhat dot com>]

Nick Garnett wrote:
> 
> As for block devices, I added block IO operations to the device driver
> table entries some time ago.

That API is alright for polled I/O, but is likely to be highly inefficient
for asynchronous or DMA'd read/writes. Particularly since you don't know
the alignment constraints for DMA; or the number of words you can read
quickly at once.

Plus we need somewhere we can add a generic buffer cache in future.

I would have assumed a separate API is needed. Compare with
/usr/include/linux/blkdev.h for example.

Jifl
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