Date: Tue, 27 May 2008 16:48:08 +0200 From: Marc =?iso-8859-1?q?L=F6rner?= <marc.loerner@hob.de> To: freebsd-ia64@freebsd.org Subject: I-Cache incoherence Message-ID: <200805271648.08425.marc.loerner@hob.de>
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Hi, when testing snapshot 7.0-Stable from 05/2008 and 8.0-Current installation discs, it seems that the image gets loaded from disc into data cache. When we now try to access this just loaded data as instructions => I-Cache is not coherent and HW just hangs (after output: "Trying to mount root from /dev/md0" and before choosing the terminal-emulation) I tried to verify this assumption with inserting a"ptc.l"-instruction before every itc.i in Instruction_TLB, so we force the HW to ensure coherency. =>It now runs further to sysinstall. Maybe the before mentioned "ptc.l" can be exchanged with fc.i or some other mechanism to ensure coherency. Unfortunately I still get a panic on probing devices in sysinstall. Hope this helps to get a solution for the I-Cache coherence problems, Marc Loerner
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