RE: [LinuxBIOS] FYI: AMD support for cache as ram.

[YhLu]

So you will use asm to enable cache as ram. ----cache_as_ram.inc
and execute the code in ROM ( compiled by gcc) to initialize the RAM.
----auto.c
but the cache only 64k, is it enough?
the cache will be used as stack for function. How about the decompress for
auto.o...
.....
cool

YH
> -----Original Message-----
> From: Li-Ta Lo [mailto:[e-mail]] 
> Sent: Friday, June 03, 2005 10:05 AM
> To: YhLu
> Cc: [e-mail]; LinuxBIOS
> Subject: RE: [LinuxBIOS] FYI: AMD support for cache as ram.
>
> On Fri, 2005-06-03 at 10:04 -0700, YhLu wrote:
> > So you make the romcc to support the real function instead
>
> of all inline...?
> >
>
> With cache as ram, we don't need romcc, everything can be 
> compiled by GCC.
> > YH
> > > -----Original Message-----
> > > From: [e-mail] [mailto:[e-mail]]
> > > Sent: Thursday, June 02, 2005 10:20 PM
> > > To: LinuxBIOS
> > > Subject: [LinuxBIOS] FYI: AMD support for cache as ram.
> > >
> > > Check out the new BIOS and Kernel Developers Guide.
> > >
> > > Eric
> > >
> > > LinuxBIOS mailing list
> > > [e-mail]
> > > http://www.openbios.org/mailman/listinfo/linuxbios
> >
> > LinuxBIOS mailing list
> > [e-mail]
> > http://www.openbios.org/mailman/listinfo/linuxbios

[LinuxBIOS] FYI: AMD support for cache as ram.

[Li-Ta Lo]

On Fri, 2005-06-03 at 10:17 -0700, YhLu wrote:
> So you will use asm to enable cache as ram. ----cache_as_ram.inc
> and execute the code in ROM ( compiled by gcc) to initialize the RAM.
> ----auto.c
> but the cache only 64k, is it enough?
> the cache will be used as stack for function. How about the decompress for
> auto.o...
> .....
> cool

64KB is actually to much for the stack. I had a (semi)working version
long time ago. It only provided 448 Bytes of space. It worked well for
UP case (actually, I think the problem was HT reset rather than stack
overflow in MP cases).

[LinuxBIOS] FYI: AMD support for cache as ram.

[Greg Watson]

Cache on the PPC is only 8K. It seems to work fine.

Greg

On Jun 3, 2005, at 11:17 AM, YhLu wrote:
> So you will use asm to enable cache as ram. ----cache_as_ram.inc
> and execute the code in ROM ( compiled by gcc) to initialize the RAM.
> ----auto.c
> but the cache only 64k, is it enough?
> the cache will be used as stack for function. How about the  
> decompress for
> auto.o...
> .....
> cool
>
> YH
> > -----Original Message-----
> > From: Li-Ta Lo [mailto:[e-mail]]
> > Sent: Friday, June 03, 2005 10:05 AM
> > To: YhLu
> > Cc: [e-mail]; LinuxBIOS
> > Subject: RE: [LinuxBIOS] FYI: AMD support for cache as ram.
> >
> > On Fri, 2005-06-03 at 10:04 -0700, YhLu wrote:
> > > So you make the romcc to support the real function instead
> >
> > of all inline...?
> > >
> >
> > With cache as ram, we don't need romcc, everything can be
> > compiled by GCC.
> > > YH
> > > > -----Original Message-----
> > > > From: [e-mail] [mailto:[e-mail]]
> > > > Sent: Thursday, June 02, 2005 10:20 PM
> > > > To: LinuxBIOS
> > > > Subject: [LinuxBIOS] FYI: AMD support for cache as ram.
> > > >
> > > > Check out the new BIOS and Kernel Developers Guide.
> > > >
> > > > Eric
> > > >
> > > > LinuxBIOS mailing list
> > > > [e-mail]
> > > > http://www.openbios.org/mailman/listinfo/linuxbios
> > >
> > > LinuxBIOS mailing list
> > > [e-mail]
> > > http://www.openbios.org/mailman/listinfo/linuxbios
>
> LinuxBIOS mailing list
> [e-mail]
> http://www.openbios.org/mailman/listinfo/linuxbios

[LinuxBIOS] FYI: AMD support for cache as ram.

[Ronald G. Minnich]

On Fri, 3 Jun 2005, YhLu wrote:
> but the cache only 64k, is it enough?

I think it is.

ron

[BULK] RE: [LinuxBIOS] FYI: AMD support for cache as ram.

"Ronald G. Minnich"  writes:
> On Fri, 3 Jun 2005, YhLu wrote:
> > but the cache only 64k, is it enough?
>
> I think it is.

Currently we use 96 bytes I think we can fit it all in 64K.
We might be able to run the normal C portion of LinuxBIOS if
we decompressed it...

Heck you can even run a small Unix in 64K.....

Eric