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Re: [bug #17346] GNU mach can't handle 4GB memory

From: olafBuddenhagen
Subject: Re: [bug #17346] GNU mach can't handle 4GB memory
Date: Mon, 20 Nov 2006 12:16:41 +0100
User-agent: Mutt/1.5.13 (2006-08-11)

Hi Barry,

On Mon, Nov 20, 2006 at 12:56:49AM +0000, Barry deFreese wrote:

>     if ((memsize >= 0x400000))
>       memsize = (0x400000-1);
>     phys_last_addr = 0x100000 + (memsize * 0x400);

Basically this is right, though the -1 is pretty pointless: 0x400000
translates to 1 GiB + 1 MiB. Staying one KiB below that makes little
sense :-)

If you want to be precise, make it 0x400000-0x400 (exactly 1 GiB); or
alternatively, ignore the fact that it's slightly above 1 GiB, in which
case you can just leave out the -1 (and use > instead of >= ).


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