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From: Peter Wemm <peter@FreeBSD.org>
To: Perforce Change Reviews <perforce@freebsd.org>
Subject: PERFORCE change 33672 for review
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http://perforce.freebsd.org/chv.cgi?CH=33672

Change 33672 by peter@peter_hammer on 2003/06/25 17:21:49

	Do a minimum of 4GB of direct map area so that we cover the
	top of the 32 bit pci map space.

Affected files ...

.. //depot/projects/hammer/sys/amd64/amd64/pmap.c#18 edit

Differences ...

==== //depot/projects/hammer/sys/amd64/amd64/pmap.c#18 (text+ko) ====

@@ -367,8 +367,8 @@
 	KPDphys = allocpages(NKPDPE);
 
 	ndmpdp = (ptoa(Maxmem) + NBPDP - 1) >> PDPSHIFT;
-	if (ndmpdp < 1)
-		ndmpdp = 1;
+	if (ndmpdp < 4)		/* Minimum 4GB of dirmap */
+		ndmpdp = 4;
 	DMPDPphys = allocpages(NDMPML4E);
 	DMPDphys = allocpages(ndmpdp);