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Date: Fri, 16 Nov 2007 10:00:04 -0500
From: "robert lazarski" <robertlazarski@gmail.com>
To: linuxppc-embedded@ozlabs.org
Subject: 85xx software reset problems from paulus.git
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Hi all, on my custom 85xx board I can't do a soft reset. I'm using
u-boot 1.3rc3 that has the latest cpu/mpc85xx/cpu.c patch to fix some
type of reset problem. When I press the software reset button on my
board after my nfs kernel panic, I get this:

Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
Rebooting in 10 seconds..Machine check in kernel mode.
Caused by (from MCSR=80000000): Machine Check Signal
Oops: Machine check, sig: 7 [#1]
MPC85xx CDS
NIP: c00131f8 LR: c0014060 CTR: c00230dc
REGS: c0289f50 TRAP: 0202   Not tainted  (2.6.24-rc2-ge6a5c27f-dirty)
MSR: 00021000 <ME>  CR: 24000028  XER: 20000000
TASK = c1020000[1] 'swapper' THREAD: c1022000
GPR00: 00000002 c1023e30 c1020000 00000000 00000686 00000047 c1023e38 00000000
GPR08: 7e58da6f f10000b0 003d0900 c0281ec8 44000088 7fffa7e3 3ffefb00 00800000
GPR16: ffffffff 00000000 007fff00 c0220000 c0260000 c0260000 00000000 3ffeb254
GPR24: c0260000 00000000 c0280000 c0219f84 c0290000 00002710 c0260000 00000000
NIP [c00131f8] fsl_rstcr_restart+0x20/0x24
LR [c0014060] mpc85xx_cds_restart+0x78/0x8c
Call Trace:
[c1023e30] [c0014008] mpc85xx_cds_restart+0x20/0x8c (unreliable)
[c1023e50] [c000c894] machine_restart+0x34/0x48
[c1023e60] [c0031f9c] emergency_restart+0x14/0x24
[c1023e70] [c00234e8] panic+0x134/0x174
[c1023f00] [c0242d5c] mount_block_root+0x108/0x24c
[c1023f50] [c02431c0] prepare_namespace+0xd0/0x210
[c1023f70] [c0242938] kernel_init+0x170/0x290
[c1023ff0] [c000d2dc] kernel_thread+0x44/0x60
Instruction dump:
80010014 38210010 7c0803a6 4e800020 7c000146 3d20c029 8129821c 2f890000
419e0010 38000002 7c0004ac 90090000 <48000000> 81230044 8009003c 70090008
Kernel panic - not syncing: Attempted to kill init!
Rebooting in 10 seconds..

I believe Clemens recently confirmed the same issue. Any ideas?
Robert