[U-Boot] [OT]Need help getting Linux past init

[Graeme Russ <graeme.russ@gmail.com>]

Hi All,

I know this post is off topic - I you can point me to a better target
audience (except LKML - they are somewhat reserved about requests for help
;) please let me know. That said, here goes...

I now have U-Boot (x86 port) fully capable of booting a Linux kernel
(2.6.33). I downloaded Buildroot and built a JFFS2 image and after a lot of
mucking around, finally got U-Boot to ls it and the Linux Kernel to mount it.

My Linux kernel command line is:

console=ttyS0,115200 noinitrd rw root=/dev/mtdblock0 rootfstype=jffs2
init=/bin/sh

I've added a few debug lines in Linux. The last lines of the boot process
are as follows:

[    1.340905] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
[    1.343423] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[    1.345935] serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
[    1.396891] brd: module loaded
[    1.422898] loop: module loaded
[    1.426898] Serck eNET flash device: 0x1000000 at 0x11000000
[    1.436921] Serck eNET Flash Bank #0: Found 1 x16 devices at 0x0 in
16-bit bank
[    1.438291]  Intel/Sharp Extended Query Table at 0x0031
[    1.439291]  Intel/Sharp Extended Query Table at 0x0031
[    1.440557] Using buffer write method
[    1.441575] cfi_cmdset_0001: Erase suspend on write enabled
[    1.449905] 8139too Fast Ethernet driver 0.9.28
[    1.460851] eth0: RealTek RTL8139 at 0x2000, 00:40:f4:6e:67:ac, IRQ 10
[    1.472862] eth1: RealTek RTL8139 at 0x2100, 00:40:f4:6e:67:ac, IRQ 9
[    1.475904] rtc_cmos rtc_cmos: rtc core: registered rtc_cmos as rtc0
[    1.479905] rtc-test rtc-test.0: rtc core: registered test as rtc0
[    1.482905] rtc-test rtc-test.1: rtc core: registered test as rtc1
[    1.498879] TCP cubic registered
[    1.505900] rtc-test rtc-test.0: setting system clock to 2010-03-24
02:12:31 UTC (1269396751)
[    1.584915] VFS: Mounted root (jffs2 filesystem) on device 31:0.
[    1.587000] Freeing unused kernel memory: 168k freed
[    1.591853] Call mark_rodata_ro()
[    1.595840] Write protecting the kernel text: 2660k
[    1.598100] Write protecting the kernel read-only data: 772k
[    1.598880] Set system_state = SYSTEM_RUNNING
[    1.600505] Call numa_default_policy()
[    1.601504] Opening /dev/console
[    1.612898] Set current->signal->flags |= SIGNAL_UNKILLABLE
[    1.614104] run_init_process(/bin/sh)
[    1.615189] sys_execve()
[    1.616189] do_execve()
[    1.816894] execve succeeded

So it looks like the kernel has no problem locating /bin/sh in the JFFS2
partition but then the lights go out. I've also tried /bin/init - same result.

I even tried changing /dev/console to be a symlink to /dev/ttyS0 but that
didn't change a thing.

I am _SO_ close to getting this going, and after all the work I have put
into U-Boot to get this far, it is really frustrating.

Any ideas?

TIA

Graeme