Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933949AbXEPSOm (ORCPT ); Wed, 16 May 2007 14:14:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1761213AbXEPSOV (ORCPT ); Wed, 16 May 2007 14:14:21 -0400 Received: from atlrel7.hp.com ([156.153.255.213]:56411 "EHLO atlrel7.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760831AbXEPSOU (ORCPT ); Wed, 16 May 2007 14:14:20 -0400 From: Bjorn Helgaas To: "Maciej W. Rozycki" Subject: Re: [patch] early printk and boot console fixups. Date: Wed, 16 May 2007 12:14:16 -0600 User-Agent: KMail/1.9.6 Cc: Yinghai Lu , Gerd Hoffmann , Andi Kleen , akpm@linux-foundation.org, Linus Torvalds , "Eric W. Biederman" , linux kernel mailing list References: <45D5C473.4010608@suse.de> <200705160959.12433.bjorn.helgaas@hp.com> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200705161214.16426.bjorn.helgaas@hp.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1458 Lines: 32 On Wednesday 16 May 2007 11:09:14 am Maciej W. Rozycki wrote: > On Wed, 16 May 2007, Bjorn Helgaas wrote: > > > > for early_uart_console, I have some ideas: > > > 1. merged that into early_serial_console in > > > arch/x86_64/kernel/early_printk.c, and > > > move early_printk.c to kernel/, --- make it understand > > > earlyprintk=uart,io,0x3f8,9600n8 > > > earlyprintk=uart,mmio,0xff5e0000,115200n8 > > > in addition to vga, ttyS, serial > > > > I would rather try to merge 8250_early and early_printk. > > "console=uart,io,0x3f8" is already pretty similar to > > "earlyprintk=serial", and it would be nice to have only one. > > > > "console=uart" does have the disadvantage that you have to know the > > port address. But it has the advantage that it doesn't depend on > > compiled-in legacy serial port names. If you need early console > > output, you're probably a developer and can come up with the address. > > Given the generic name of "uart" I am assuming this will work with any > UART driver making use of the serial_core.c core -- am I correct? I knew somebody would ask that eventually :-) Unfortunately, the answer is "no." "console=uart" only works with 8250-compatible devices. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/