Subject: Re: i82544EI ethernet driver
To: Kate Feng <firstname.lastname@example.org>
From: Allen Briggs <email@example.com>
Date: 11/15/2004 15:09:48
On Mon, Nov 15, 2004 at 02:56:11PM -0500, Kate Feng wrote:
> You mentioned the code was tested for both big-endian and
> little-endian. It must be somewhere I have to do
> #define BYTE_ORDER BIG_ENDIAN
> Does that make sense ?
The bus_space(9) interface and proper coding practice should prevent
you from needing to #define BYTE_ORDER BIG_ENDIAN. The byte order
on CPU->PCI reads/writes should be handled by the bus_space API.
The byte order for DMA should be handled by the usage of htole32
macros. These won't do anything on little-endian systems, but will
swap the bytes for big-endian systems so that the PCI device will
read little-endian format.
Are you having difficulty with the driver as it is?
Use NetBSD! http://www.netbsd.org/