Re: Warm reboot on 826x targets

--- Paul Gortmaker <p_gortmaker@yahoo.com> wrote:

I've been trying to get a WRS 8265 to do a warm reboot, and
found some
things that I am wondering about.

Firstly, is anyone having success on having "reboot" restart
the machine
on a similar platform?

Secondly, the default BOOTROM_RESTART_ADDR is 0x40000104
(sbc82xx.h) and I
was wondering if this matches any platforms out there.  On
this board, the
place where U-Boot lives is 0xFFF00104 -- and I've verified
this by typing
"g fff00104" at the U-Boot prompt which causes U-Boot to
simply restart.

I've changed the value in sbc82xx.h and now at the reboot,
instead of a
register dump, it simply hangs.  Looking at m8260_gorom (in
kernel/head.S)
it clears the MSR_EE (ext int. enable) bit in the MSR before
jumping --
but I was wondering if there are other bits in MSR that need
to be
cleared; e.g. instruction relocation enable and data
relocation enable
(MSR_IR and MSR_DR). The register bits are on p76 of
MPCFPE32B.pdf from
Freescale.

I guess if somebody even said "it works for me" then I'd have
a better
feeling thinking that what is done to the MSR currently is
sufficient.

Paul.

I'm working on the exact same problem with u-boot (trying to do
warm reboot from the VxWorks shell). I modified romInit.S to
pass control to u-boot (at 0xfe000000) and that works just fine.
But after I boot VxWorks from u-boot (go 0xfff00100) and invoke
reboot from the VxWorks shell, it just hangs. If I boot VxWorks
without invoking u-boot first, it works fine. If you find the
problem befor me, let me know and I'll do tha same...

		
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