From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from an-out-0708.google.com (an-out-0708.google.com [209.85.132.246]) by ozlabs.org (Postfix) with ESMTP id B3F61DDE0A for ; Tue, 18 Nov 2008 15:42:48 +1100 (EST) Received: by an-out-0708.google.com with SMTP id d11so1124395and.39 for ; Mon, 17 Nov 2008 20:42:46 -0800 (PST) Message-ID: Date: Mon, 17 Nov 2008 22:42:46 -0600 From: "Timur Tabi" Sender: timur.tabi@gmail.com To: "Timur Tabi" , "Paul Mackerras" , linuxppc-dev@ozlabs.org Subject: Re: powerpc: udbg based backend for hvc_console In-Reply-To: <20081118004005.GC26336@yookeroo.seuss> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 References: <20081024035434.GF4267@yookeroo.seuss> <20081118004005.GC26336@yookeroo.seuss> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Mon, Nov 17, 2008 at 6:40 PM, David Gibson wrote: > Because the udbg console works for kernel messages, but doesn't > support a full tty interface, so you can't run userspace with only a > udbg console. I still don't understand the point of your driver. You're just routing hcalls to a udbg back-end. So if you have a driver that supports udbg but not standard console or TTY, then you can use your driver to get console/tty I/O. Is there a platform where such a setup exists? All HVC drivers support console and TTY, as do all serial drivers. So what platform would use your driver? -- Timur Tabi Linux kernel developer at Freescale