From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mailout03.sul.t-online.com (mailout03.sul.t-online.com [194.25.134.81]) by ozlabs.org (Postfix) with ESMTP id B54F167A75 for ; Tue, 15 Feb 2005 08:50:17 +1100 (EST) To: srinivas.surabhi@wipro.com From: Wolfgang Denk Mime-version: 1.0 Content-type: text/plain; charset=ISO-8859-1 In-reply-to: Your message of "Mon, 14 Feb 2005 19:55:35 +0530." Date: Mon, 14 Feb 2005 22:49:59 +0100 Sender: wd@denx.de Message-Id: <20050214215004.5C72AC1430@atlas.denx.de> Cc: linuxppc-embedded@ozlabs.org Subject: Re: Mounta Vista Linux prompt on serial console List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , In message you wrote: > > Our target is somewhat like this. It has PPC8270, Flash and SDRAM. We > are using the uboot for booting. Successfully built the linux kernel and > Ramdisk images using devrocket. The problem is that the kernel and Are you sure that your Linux kernel is configured to be booted by U-Boot? > Ramdisk images although getting extracted successfully to 0M location of > SDRAM from Flash with the help of uboot, the serial console says nothing > except "uboot ist nicht tot..." Funny. This message is neiter part of the standard U-Boot code nor of the standard Linux kernel. Try to find out where this code is coming from. > 1. How do I know that the control was given to linux kernel? Set a breakpoint at a low address like 0x000C. If the debugger stops there you are executing Linux kernel code. Alternatively, enable DEBUG when building your U-Boot image (at least when compiling file "common/cmd_bootm.c"). > 2. Is it that the linux kernel got the control but unable to put the > prompt on the serial line? FYI. I modified the inittab to reflect the > console to come on the serial line. Inittab has nothing to do with the kernel's startup messages. Is your kernel configured correctly for using a serial console? > 3. Is there any documentation which gives the detailed debugging of the > linux kernel from the loading of kernel? This is partially covered in the DULG, see http://www.denx.de/twiki/bin/view/DULG/Manual Best regards, Wolfgang Denk -- See us @ Embedded World, Nuremberg, Feb 22 - 24, Hall 10.0 Booth 310 Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de Cogito cogito ergo cogito sum - "I think that I think, therefore I think that I am." - Ambrose Bierce, "The Devil's Dictionary"