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Message
From: James Cotton<peabody124@g...>
Date: Sun Feb 24 00:51:17 CET 2008
Subject: [openrisc] boot loaders and interrupt vectors
I have a question about how to run a boot loader properly. I see that
the linux kernel has support for boot from flash, and can
automatically copy the kernel from one location and another and then
jump into it. What I don't get is the ideal memory structure and
interrupt locations. If I have my flash at 0xF0000000 and my kernel
residing there, then I need my exception reset vector to point there
on startup. However, after everything is copied into ram, lets say at
0x00000000, I'd like all the exception vectors except bus reset to
point into ram. Is the correct way to have a shadow of the flash
memory from 0x100 to 0x1FF, and if so is there a way to do that with
the wishbone traffic cop?
Thanks, and I apologize if I'm totally missing the point and should
RTFM (please tell me which manual if so :-)).
James
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