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Article #12403Re: HP-PA softw. virtual addr. translation HOW ?
From: Paul Gootherts
Date: Thu, 28 Jan 1993 19:52
Date: Thu, 28 Jan 1993 19:52
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> Each entry in the hash table points to the FIRST PPN in a linked list of all > physical pages whose VPN hash to the same value. Thus, you walk > the linked list in the PDIR, examining each entry to see if its VPN matches > the one you are looking for (presumably, the one you got a TLB miss on). > If a match is found, you found it! (And the physical address is > the PPN (which is based on the PDIR index as you noticed) plus the original > bottom 11 or so bits (i.e.: virtual pages are aligned on physical page > boundaries). > > (I emailed a little more to him) I hope you included a note that the format of the PDIR can differ from release to release. As new boxes are released, the factory occasionally changes the PDIR to keep take advantage of new features and performance opportunities. -- Paul Gootherts, pdg@cup.hp.com
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Newsgroups: comp.arch,comp.sys.hp Path: arc1-ca.pugleaf.net!sparky!uunet!think.com!spool.mu.edu!sdd.hp.com!hpscit.sc.hp.com!cupnews0.cup.hp.com!pdg From: pdg@cup.hp.com (Paul Gootherts) Subject: Re: HP-PA softw. virtual addr. translation HOW ? Sender: news@cup.hp.com (News Admin) Message-ID: <C1Kxvv.FCM@cup.hp.com> Date: Thu, 28 Jan 1993 19:52:42 GMT References: <C1JyD8.FK0@unix.portal.com> Organization: Hewlett-Packard X-Newsreader: TIN [version 1.1.8 PL6] Lines: 19