Date: Fri, 28 Jan 2005 13:23:55 +0100 From: Espen Skoglund <esk@ira.uka.de> To: Christian Hildner <christian.hildner@hob.de> Cc: freebsd-ia64@freebsd.org Subject: Re: TLB miss handlers Message-ID: <16890.11995.972474.700748@i30nb20.ira.uka.de> In-Reply-To: <41FA27AD.4030208@hob.de> References: <41FA27AD.4030208@hob.de>
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[Christian Hildner] > Hi, > ld8 r21=[r21] // check VHPT tag > ^^^^^^^^^^ > Are you sure you cannot enter a nested TLB miss fault here on IA64 > implementations that do not have the VHPT walker implemented? You > wouldn't get fault 0x0000 since there is no walker that throws that > fault. Er... I can't remember seeing anywhere that implementing the VHPT walker in the CPU is optional. Anyhow, I'd imagine that the VHPT is located in a place that is backed by a pinned TR. But I'm not really familiar with FreeBSD internals, so... eSk
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