Date: Thu, 9 Jul 1998 08:34:40 -0700 (PDT) From: gallatin@cs.duke.edu To: freebsd-gnats-submit@FreeBSD.ORG Subject: i386/7227: pmap_setdevram() disabled in wrong place Message-ID: <199807091534.IAA29258@hub.freebsd.org>
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>Number: 7227 >Category: i386 >Synopsis: pmap_setdevram() disabled in wrong place >Confidential: no >Severity: non-critical >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Thu Jul 9 08:40:00 PDT 1998 >Last-Modified: >Originator: Andrew Gallatin >Organization: Duke University, Department of Computer Science >Release: 3.0-CURRENT >Environment: FreeBSD grasshopper.cs.duke.edu 3.0-CURRENT FreeBSD 3.0-CURRENT #4: Wed Jul 8 19:58:49 EDT 1998 gallatin@grasshopper.cs.duke.edu:/usr/src/sys/compile/GRASSHOPPER i386 >Description: The dangerous call to pmap_setdevram() which enables write combining on video cards in P6/PII machines is already disabled in vga_probe(). Others may want to enable write combining on other devices (like Myrinet cards) -- the immediate return in pmap_setdevram() should go away. (broken out of i386/7201) >How-To-Repeat: Try enabling WC on a memory mapped PCI device on a PII ;-) >Fix: RCS file: /scratch/freebsd-cvs/src/sys/i386/i386/pmap.c,v retrieving revision 1.202 diff -c -r1.202 pmap.c *** pmap.c 1998/05/21 07:47:34 1.202 --- pmap.c 1998/07/09 15:27:37 *************** *** 505,511 **** unsigned long long base; unsigned long long mask; - return; if (cpu != CPU_686) return; --- 505,510 ---- >Audit-Trail: >Unformatted: To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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