From mboxrd@z Thu Jan 1 00:00:00 1970 From: Grant Grundler Subject: Re: [parisc-linux] Space registers and how to use them Date: Sun, 25 Sep 2005 11:35:13 -0600 Message-ID: <20050925173513.GA22786@colo.lackof.org> References: <20050925034342.GA1459@parisc-linux.org> <43367383.6030307@tiscali.be> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: parisc-linux@parisc-linux.org To: Joel Soete Return-Path: In-Reply-To: <43367383.6030307@tiscali.be> List-Id: parisc-linux developers list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: parisc-linux-bounces@lists.parisc-linux.org On Sun, Sep 25, 2005 at 09:53:07AM +0000, Joel Soete wrote: > Btw can you help me to undurstand the concept of the 4 quadrants as it was > spoken in: > A "quadrant" is 1GB of address space. Think of each 1GB of address space in 4GB as a "quadrant". > Used in hpux? (documented somewhere?) Probably. > Is it related to the usage of sr4-7 as 4 different kernel spaces? Yes. "2 bit s" field in fdc/fic map each "quadrant" to sr4-7. ie 0-1GB uses sr4, 1-2GB uses sr5, etc. John was just saying it doesn't matter since parisc-linux uses the same value in all four (sr4-7) space registers. grant _______________________________________________ parisc-linux mailing list parisc-linux@lists.parisc-linux.org http://lists.parisc-linux.org/mailman/listinfo/parisc-linux