Date: Fri, 16 Jul 2004 19:30:54 GMT From: John Baldwin <jhb@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 57475 for review Message-ID: <200407161930.i6GJUsAh009361@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=57475 Change 57475 by jhb@jhb_slimer on 2004/07/16 19:30:25 Hack hack. Try mapping all of the BIOS (0xc0000 - 0xfffff) as read/write to see if that fixes problems people have with PnP BIOS enumeration on Intel motherboards. Affected files ... .. //depot/projects/smpng/sys/i386/i386/locore.s#23 edit Differences ... ==== //depot/projects/smpng/sys/i386/i386/locore.s#23 (text+ko) ==== @@ -787,9 +787,24 @@ movl $1,%ecx fillkptphys(%edx) -/* Map read-only from page 1 to the beginning of the kernel text section */ +#define BIOS_START 0xc0000 +#define BIOS_END 0xfffff + +/* Map read-only from page 1 to the beginning of BIOS */ movl $PAGE_SIZE, %eax xorl %edx,%edx + movl $(BIOS_START - PAGE_SIZE)/PAGE_SIZE,%ecx + fillkptphys(%edx) + +/* Map the BIOS read-write for BIOS calls that want to write to it */ + movl $BIOS_START, %eax + movl $PG_RW,%edx + movl $(BIOS_END + 1 - BIOS_START)/PAGE_SIZE,%ecx + fillkptphys(%edx) + +/* Map read-only from the BIOS to the beginning of the kernel text section */ + movl $BIOS_END + 1, %eax + xorl %edx,%edx movl $R(btext),%ecx addl $PAGE_MASK,%ecx subl %eax,%ecx
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