Date: Sat, 29 May 1999 12:47:53 -0700 (PDT) From: Andrew Gallatin <gallatin@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/alpha/alpha mem.c Message-ID: <199905291947.MAA28575@freefall.freebsd.org>
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gallatin 1999/05/29 12:47:53 PDT
Modified files:
sys/alpha/alpha mem.c
Log:
When memory mapping a PCI device (like XFree86 does) on an XP1000, we must
use ALPHA_PHYS_TO_K0SEG(offset) rather than just plain offet. I've verified
that this does not break other platforms (I've tested an AlphaStation 200
and a Personal Workstation 500au with this patch).
As to why this works, well.. Its black magic as far as I know. I obtained
this hack from Myricom, who in turn, obtained it from Compaq engineers.
Without this hack, XFree86 cannot talk to a PCI graphics card.
Reviewed by: Doug Rabson <dfr@nlsystems.com>
Obtained from: feldy@myri.com (Bob Felderman)
Revision Changes Path
1.8 +2 -2 src/sys/alpha/alpha/mem.c
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