no output to serial console from /init process on ml405
antonkowalski at gmail.com
Wed Aug 8 21:28:16 EST 2007
I'm trying to bring up linux 126.96.36.199 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
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
[ 3.018391] tun: Universal TUN/TAP device driver, 1.6
[ 3.079115] tun: (C) 1999-2004 Max Krasnyansky <maxk at qualcomm.com>
[ 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..<NULL>
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.
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