[ECOS] IXP425 RedBoot reset Ethernet problem
Thu Mar 11 16:27:00 GMT 2004
We are developing a product based on the IXDP425 Richfield board from
Intel. RedBoot has been working just fine for our development activities
on the IXDP425 board, but we are having some problems with the Ethernets
on our own board.
First off, we are using RedBoot 1.92 (custom built). It includes the
Intel code for brining up the built-in Ethernet modules on the IXP425.
We have noticed that if we:
1. power on the board
2. wait for the RedBoot prompt
3. type "reset"
4. then at the RedBoot prompt again we load the kernel and ramdisk
the Ethernets come up in Linux every time. However if we just load Linux
from a power-up, without doing a reset, the Ethernets won't come up
(Linux THINKS they are up, but no pings go through). If we ifconfig down
and ifconfig up the Ethernets a few times, they usually start passing
traffic, but after about 100 packets the kernel panics.
On the Richfield, the Ethernets come up every time (whether power-cycled
or software "reset") and we can ping flood the Ethernet interfaces and
all is well.
I'm not very familiar with the RedBoot code so I'm not sure where to
start looking to solve this problem, or to figure out what is going on.
It could be a hardware difference between our boards and the Richfield,
but the hardware engineer and I have gone over the design with a fine
tooth comb and can't see anything that would cause this.
Thanks in advance.
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