From: Chris Dumoulin <cdumoulin@ics-ltd.com>
To: linuxppc-embedded@ozlabs.org
Subject: When is it safe to start using ioremap?
Date: Tue, 09 May 2006 17:13:20 -0400 [thread overview]
Message-ID: <446105F0.6080004@ics-ltd.com> (raw)
At what point in the linux boot sequence can/should you start using
ioremap to get a virtual address to hardware? Early on (in head_4xx.S),
I'm setting up a TLB entry to access my hardware, but eventually my TLB
entry will be overwritten, and at this point I would like to call
ioremap to get an address for accessing my hardware. I'm having trouble
figuring out when the original TLB entry will be overwritten (can that
even be determined?), and at what point I can start calling ioremap.
Any help is appreciated.
Cheers,
Chris Dumoulin
--
*--Christopher Dumoulin--*
Software Team Leader
<http://ics-ltd.com/>
<http://ics-ltd.com/>
Interactive Circuits and Systems Ltd.
5430 Canotek Road
Ottawa, ON
K1J 9G2
(613)749-9241
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reply other threads:[~2006-05-09 21:13 UTC|newest]
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