On Fri, 9 Mar 2001, John G Dorsey wrote:
> Leonard Ye wrote:
>
> > 1) bootldr + ramdisk. The ramdisk will be unpacked into DRAM at boot
> > time. Such method wastes a lot of DRAM and makes writing back to
> > flash diffcult.
>
> I tend to use this one most often if I'm doing kernel development,
> because until I figure out some trick to speed up JFFS replays,
> unpacking a 3MB ramdisk is actually faster than replaying a 30MB log
> during boot.
If you don't have to ask questions to the flash chips, you may consider
enabling the data cache for both the flash and the ram. This plus the
instruction cache plus clock switching enabled should dramatically improve
the replay's speed. Also speeding up flash access timing should help since
it defaults to the slowest on boot IIRC.
Nicolas
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