From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ik-out-1112.google.com (ik-out-1112.google.com [66.249.90.177]) by ozlabs.org (Postfix) with ESMTP id F1BCCDDEE0 for ; Thu, 9 Aug 2007 05:42:46 +1000 (EST) Received: by ik-out-1112.google.com with SMTP id b35so126087ika for ; Wed, 08 Aug 2007 12:42:44 -0700 (PDT) Message-ID: Date: Wed, 8 Aug 2007 15:42:42 -0400 From: "Anton Kowalski" To: "Benedict, Michael" Subject: Re: no output to serial console from /init process on ml405 In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 References: Cc: linuxppc-embedded@ozlabs.org List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Indeed I hadn't set up the compulsary links correctly. In reading through the devices.txt document I realized that I don't have /proc mounted either. So the following links might not make much sense until /proc is up. slink /dev/fd /proc/self/fd 777 0 0 slink /dev/stdin /proc/self/fd/0 777 0 0 slink /dev/stdout /proc/self/fd/1 777 0 0 slink /dev/stderr /proc/self/fd/2 777 0 0 Thanks for your help. Anton On 8/8/07, Benedict, Michael wrote: > Just a guess, but do you have stdout and friends defined as recommended > in the Compulsory links section of Documentation/devices.txt? > -Michael > > > -----Original Message----- > > From: > > linuxppc-embedded-bounces+mbenedict=twacs.com@ozlabs.org > > [mailto:linuxppc-embedded-bounces+mbenedict=twacs.com@ozlabs.o > rg] On Behalf Of Anton Kowalski > > Sent: Wednesday, August 08, 2007 6:28 AM > > To: linuxppc-embedded@ozlabs.org > > Subject: no output to serial console from /init process on ml405 > > > > Hi All: > > > > I'm trying to bring up linux 2.6.21.1 on an ml405 board. The kernel > > boots fine but the init process does not produce any output. The /init > > program resides in an initramfs file system and I believe the /dev > > device files have been set up correctly. Here's an excerpt from my > > initramfs specification: > > > > dir /dev 755 0 0 > > nod /dev/console 644 0 0 c 5 1 > > nod /dev/ttyS0 644 0 0 c 4 64 > > > > (I am able to open these files from the init program. I tested this by > > sleeping for a specified time on success.) > > > > Also, printk continues to function after /init terminates and before > > the kernel panics. > > > > Here are the last few lines of the console output: > > > > [ 0.507478] Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, > > IRQ sharing disabled > > [ 0.513862] serial8250.0: ttyS0 at MMIO 0x80201003 (irq = > > 3) is a 16550A > > [ 2.927509] RAMDISK driver initialized: 1 RAM disks of 8192K size > > 1024 blocksize > > [ 3.018391] tun: Universal TUN/TAP device driver, 1.6 > > [ 3.079115] tun: (C) 1999-2004 Max Krasnyansky > > [ 3.154919] mice: PS/2 mouse device common for all mice > > [ 3.218021] TCP cubic registered > > [ 3.257034] NET: Registered protocol family 1 > > [ 3.309405] NET: Registered protocol family 17 > > [ 3.363462] Freeing unused kernel memory: 300k init > > [ 23.488277] Kernel panic - not syncing: Attempted to kill init! > > [ 23.559517] Rebooting in 180 seconds.. > > > > I'm using the plb uart and the 8250.c driver. (The obp uartlite driver > > didn't work so I switched.) The kernel and the init program were > > compiled with eldk. > > > > Any insights into resolving this problem are greatly appreciated. > > > > > > Anton > > _______________________________________________ > > Linuxppc-embedded mailing list > > Linuxppc-embedded@ozlabs.org > > https://ozlabs.org/mailman/listinfo/linuxppc-embedded > > > > > > _______________________________________________ > Linuxppc-embedded mailing list > Linuxppc-embedded@ozlabs.org > https://ozlabs.org/mailman/listinfo/linuxppc-embedded >