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Subject: Re: How to map device addresses into user space
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From: "Dr. Rolf Jansen" <rj@cyclaero.com>
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Date: Fri, 4 Jan 2013 01:00:17 -0200
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Am 03.01.2013 um 17:17 schrieb Mehmet Erol Sanliturk:

> On Thu, Jan 3, 2013 at 8:45 AM, Dr. Rolf Jansen <rj@cyclaero.com> =
wrote:
>=20
>> ...
>>=20
>> I need to map the Base Address Registers into user space memory, in =
order to pass the BAR's to the National Instruments Drivers Development =
Kit (NI-DDK). The DDK is a complex set of C++ classes running in user =
space, that read/write directly from/into the BAR's.
>>=20
>> The FreeBSD bus_space_* functions are useless in this respect, =
because the DDK isn't designed that way, I need the BAR addresses mapped =
into user space.
>>=20
>> ...
>=20
> There is the following book:
>=20
> FreeBSD Device Drivers
>=20
> Product Details
>=20
>     Paperback: 352 pages
>     Publisher: No Starch Press; Original edition (May 7, 2012)
>     Language: English
>     ISBN-10: 1593272049
>     ISBN-13: 978-1593272043


Mehmet,

Many thanks for your response.

I know this book. It suggests accessing the PCI registers using Newbus =
(Chapter 7). Newbus hides away direct reading/writing to the BAR's, and =
therefore, Newbus is useless in the given respect.

Again, I need the exact PCI Base Address Registers directly mapped into =
user space, so that I can do in my user space measurement controller =
something like the following:

  user_space_BAR[0 + funcOffset] &=3D 0x03;

Best regards

Rolf