Re: no more MTRRs available ?

Dave Jones (davej@codemonkey.org.uk)
Wed, 29 Jan 2003 16:52:48 +0000

On Wed, Jan 29, 2003 at 04:14:46PM +0000, Dave Jones wrote:

> > # cat /proc/mtrr
> > reg00: base=0x00000000 ( 0MB), size=2048MB: write-back, count=1
> > reg01: base=0x80000000 (2048MB), size=1024MB: write-back, count=1
> > reg02: base=0xc0000000 (3072MB), size= 512MB: write-back, count=1
> > reg03: base=0xe0000000 (3584MB), size= 256MB: write-back, count=1
> > reg04: base=0xf0000000 (3840MB), size= 128MB: write-back, count=1
> > reg05: base=0xf7000000 (3952MB), size= 16MB: uncachable, count=1
> Due to this 16MB hole, your BIOS has to set up a write-back range
> covering 2048-16 (2032MB).

Dummies guide to maths. This should be 4096-16=4080 of course

Dave

-- 
| Dave Jones.        http://www.codemonkey.org.uk
| SuSE Labs
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