Re: [coreboot] [announce] coreboot for the 21st century

[mrnuke]

On Saturday, March 22, 2014 03:56:46 AM Andrew Wu wrote:
> Yes, that is right. DMP/Vortex86EX has no MTRR. So it maybe a problem
> if without romcc. :(

Is there any way whatsoever to temporarily use the cache as SRAM?

Alex

[announce] coreboot for the 21st century

[ron minnich]

On Fri, Mar 21, 2014 at 1:33 PM, mrnuke  wrote:
> On Saturday, March 22, 2014 03:56:46 AM Andrew Wu wrote:
> > Yes, that is right. DMP/Vortex86EX has no MTRR. So it maybe a problem
> > if without romcc. :(
>
> Is there any way whatsoever to temporarily use the cache as SRAM?

when we did the first real CAR work MTRRs were not needed. I'm not
sure if they would be on the vortex. We might want to test the very
early CAR code and see how it goes. It's actually quite simple.

Also, let's just take it a little easy here. These are proposals,
nothing is ever perfect on first release, the world is not ending,
Google is not showing up at coreboot.org in skimasks and unmarked
uniforms ...

I think a fork would harm everyone, and would be destructive of our
common goals. Please remember that we are all trying to do the right
thing, and our different situations give us different perspectives.

Nobody is coming in here with bad motives. We're just trying to muddle
our way through the many demands of different stakeholders now that
coreboot, thanks to the efforts of some pretty dedicated people, has
become a runaway success.

ron

[announce] coreboot for the 21st century

[Andrew Wu]

2014-03-22 4:33 GMT+08:00 mrnuke :
> On Saturday, March 22, 2014 03:56:46 AM Andrew Wu wrote:
> > Yes, that is right. DMP/Vortex86EX has no MTRR. So it maybe a problem
> > if without romcc. :(
>
> Is there any way whatsoever to temporarily use the cache as SRAM?
>
> Alex

Sorry, I checked Vortex86EX CPU datasheet, but it seems there is no
workaround can do it.

So if I want to get rid of romcc, maybe I have to write DRAM init code
in assembly, That is not very easy. :(

Andrew