cvs commit: src/sys/powerpc/booke machdep.c

[Marcel Moolenaar]

On Mar 8, 2008, at 2:19 AM, Rafal Jaworowski wrote:

> Marcel Moolenaar wrote:
>> marcel      2008-03-08 05:36:25 UTC
>>
>>  FreeBSD src repository
>>
>>  Modified files:
>>    sys/powerpc/booke    machdep.c
>>  Log:
>>  Enable the D-cache and I-cache when not already enabled.
>>  It so happens that U-Boot disables the D-cache when booting
>>  an ELF image, so this change makes sure we run with the
>>  D-cache enabled from now on. It shows too...
>>
>
> Thanks for hooking this up, Marcel; it was [far] on my list too :)

I just wanted my kernel builds to be faster :-)

> BTW: currently U-Boot is broken for most of PPC variations  
> (including 85xx) in
> the following way: d-cache is not being flushed before disabling and  
> strange
> things happen as you imagine. For a quick workaround apply something  
> like this
> when using ELF images:
> http://people.freebsd.org/~raj/patches/misc/uboot-dcache-workaround.diff

Yup. That's what we do at Juniper. I don't see any bad effects other
than having to invalidate the cache before (re-)enabling it so I don't
have that patch applied myself...

The problem I'm having with U-Boot is with the TSEC driver as you've
seen on the U-Boot mailing list. I have one MPC8555CDS sitting idle
after the U-Boot upgrade because I can't netboot :-/

-- 
Marcel Moolenaar
xcllnt at mac.com