[U-Boot-Users] U-Boot 750FX CPU support
Wolfgang Denk
wd at denx.de
Wed Jun 18 16:13:29 CEST 2003
Dear Tom,
in message <92E171C34A30D51193CA000103CE74F003790A0B at CAREX> you wrote:
> I'm adding support for the IBM 750FX processor and I have a question about
> how to add this support in the u-boot/cpu/74xx directory. The files that
> would be affeted are
I guess you mean cpu/74xx_7xx/ ?
> start.S - to accommodate the additional 8 BATS (total 8 instruction, 8 data)
> routines effected: invalidate_bats(), setup_bats()
> speed.c - the 750FX needs a unique multiplier table (hid1_multipliers_x_10)
> routines effected: get_clocks()
>
> Should this be #ifdef CONFIG_750FX build rule? If not, should there be some
> processor identification in the routines effected to take the correct
> action? This would be unique to the 750FX right now but future CPUs may
> need this too.
I think it makes sense to add this using a CONFIG_750FX #define; if
it turns out that (many) other CPUs will need this, we may optimize
this later.
Happy hacking!
Wolfgang Denk
--
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de
The nice thing about standards is that there are so many to choose
from. - Andrew S. Tanenbaum
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