From owner-freebsd-drivers@freebsd.org Wed May 4 02:21:57 2016 Return-Path: Delivered-To: freebsd-drivers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 4DB48B2CA96 for ; Wed, 4 May 2016 02:21:57 +0000 (UTC) (envelope-from kumara.bsd@gmail.com) Received: from mail-wm0-x22b.google.com (mail-wm0-x22b.google.com [IPv6:2a00:1450:400c:c09::22b]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id DE57719EE for ; Wed, 4 May 2016 02:21:56 +0000 (UTC) (envelope-from kumara.bsd@gmail.com) Received: by mail-wm0-x22b.google.com with SMTP id g17so68724335wme.1 for ; Tue, 03 May 2016 19:21:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to; bh=oCgP8sM7KAHAmPGKx8G9MY8k/OusyCOpfyH2+3eQy1A=; b=mdUV1cfw1QgNoTAE7ClA754ZRBM0C3IwWiUEIJHaDyMrHTIR9H8EooGbc1F2NerRbo ngn64PhdnoIJdAI8hiGOOS6/hS6peeOZzdatBXv39SdzJkmyN0jSyFFmgXrrurWLif8+ UcEyaUVCm2k2xkLeWt9SUMY3rMT6EkHPkD75aCpq5WZAokXXAjysow5nBxgOTu8fA3XX m/cjpvok/k6OJNek0u25sq5b1hu8jngrmGGyfWVapD/Vj9LqBQQyq86pYSXs5i6sIxRa pMsdWNuK7jD/va4gOSSLO51BgaZxcaeImhrs4yz4l4K7DAs34jDkpEjvPC8BJJK6HlM7 FXFA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=oCgP8sM7KAHAmPGKx8G9MY8k/OusyCOpfyH2+3eQy1A=; b=Ug/0pOjsUmoNn4QJ9/atP4FL/6RuSxEPYTmta/Ln+8imkSU4RcAcM0o/y5YzytVwhU 3Oz2w+kx6a02bawRGeoDNj706wUCbqYdRYJD1PZqE4lbH3extXTvAHWU2AqYvAC5UEqP rMGPe+r8w63BJZ8SqxgHbq2eYPCzzVNyZYuNZWzKut5q2FellhuGTvqhiyxaW3BZmGFD KIgiLvaZ4fYEClE/R8iREsMTgtk+MNt1U6ahWydzQZbms+insNWS1XlnqY5QL/+fxklV ZtkYXbCsA12yDP4AlPSffq3AO/vFHwjpy+xbfYHujNNP4MZnroVuT7SEQ/IzsjOPN0cx 9ZVw== X-Gm-Message-State: AOPr4FVJyp3raiNKQdRnfoVIzVEP2YitQryOm7lXlmidkR4z4JzakhNXsQ4otg8Bc53kRDp8oQguxaLA7Bzh/Q== MIME-Version: 1.0 X-Received: by 10.28.31.73 with SMTP id f70mr6746607wmf.77.1462328515187; Tue, 03 May 2016 19:21:55 -0700 (PDT) Received: by 10.194.188.6 with HTTP; Tue, 3 May 2016 19:21:55 -0700 (PDT) Date: Wed, 4 May 2016 07:51:55 +0530 Message-ID: Subject: Device Pager From: kumara rathnavel To: freebsd-drivers@freebsd.org Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.22 X-BeenThere: freebsd-drivers@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: Writing device drivers for FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 May 2016 02:21:57 -0000 Hello All, I have written a character device pager. I have associated an object with my device and I have mapped it to the kernel and I also have a virtual address for it. So whenever the address is accessed first time I get a page fault and i give the physical address to be associated in the fault routine. Now how do I again get a page fault for the same virtual address. I need to change the physical address periodically for a virtual address. Thanking You, Kumar