Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Thu, 15 Nov 2001 16:26:29 -0600

Nick Rees wrote:
> 
> While I'm on it, I was using a PowerPC mvme2402 for some of these tests. I
> am running Tornado 2.0.2. Whenever the PPC reboots it spends ages doing
> apparently nothing (i.e. about 3 minutes) just before it prints out the
> Attaching TCP/IP and network interface messages (i.e. very eearly in the
> boot).
> 
> Does anyone have any idea how to get rid of this. It does it twice, so
> waiting 5-6 minutes every boot is a bit of a bore.

Yes, reduce the size of any unnecessary memory areas defined in
sysPhysMemDesc[].  You may have added a large block for VME A32 space,
which will take the CPU a long time (and lots of memory, about 1K/MB IIRC)
to set up the page tables for.  Use the sysBatDesc[] table instead for
large areas, but note that there are only 4 DBATs and they can only cover
a maximum of 256MB each, so you're limited to a 1GB address range.  We
only put VME boards in the A32 range 0x80000000-0xbfffffff because of
this.

- Andrew
-- 
Perfection is reached, not when there is no longer anything to add,
but when there is no longer anything to take away.
- Antoine de Saint-Exupery

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System