From: Kumar Gala <galak@kernel.crashing.org>
To: Fredrik Roubert <roubert@df.lth.se>
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: PowerPC Local Bus
Date: Tue, 8 Aug 2006 10:03:59 -0500 [thread overview]
Message-ID: <5C1C19D6-8FC8-46AF-9C4B-B9989B1A997B@kernel.crashing.org> (raw)
In-Reply-To: <20060808135020.GG26606@igloo.df.lth.se>
On Aug 8, 2006, at 8:50 AM, Fredrik Roubert wrote:
> Hi!
>
> I'm about to write drivers for some FPGA's that are connected to the
> local bus of a PowerQUICC II Pro processor and use the user-
> programmable
> machines (UPM's) to transfer data over the bus. What code does already
> exist for Linux to help me with this? In the stock kernels, I can't
> even
> find a structure definition for the registers of the local bus
> controller, but it seems strange that no-one has written such code
> before me. Will I really have to write everything from scratch, or
> what
> code is there that I don't know about yet?
The reason you haven't seen any code is due to several reasons. One,
FPGA/localbus implementations can be very specific and thus reuse is
difficult. Two, some of this code tends to end up it boot loaders to
setup the UPM (take a look at U-boot for possible UPM config code).
- kumar
next prev parent reply other threads:[~2006-08-08 15:04 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-08 13:50 PowerPC Local Bus Fredrik Roubert
2006-08-08 15:03 ` Kumar Gala [this message]
2006-08-09 12:29 ` Fredrik Roubert
2006-08-09 13:05 ` Kumar Gala
2006-08-08 16:06 ` David Hawkins
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