Date: Thu, 3 Jan 2013 11:17:42 -0800 From: Mehmet Erol Sanliturk <m.e.sanliturk@gmail.com> To: "Dr. Rolf Jansen" <rj@cyclaero.com> Cc: freebsd-drivers@freebsd.org Subject: Re: How to map device addresses into user space Message-ID: <CAOgwaMv8rzHPyCLV2OJ-2h9T2SiRHdvdCD=Dp%2Bs8guaCmybe1Q@mail.gmail.com> In-Reply-To: <DFC983B8-91B2-4ED8-89B0-FC4BD4AB2576@cyclaero.com> References: <DFC983B8-91B2-4ED8-89B0-FC4BD4AB2576@cyclaero.com>
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On Thu, Jan 3, 2013 at 8:45 AM, Dr. Rolf Jansen <rj@cyclaero.com> wrote: > I am building a loadable kernel module for FreeBSD 9.1-RELEASE x86_64 for > a PCI Data Acquisition board from National Instruments. > > 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. > > 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. > > Having the measurement done by the kernel module is not an option either, > because it is math intensive, and kernel modules are build without SSE and > with soft float. > > I got tiny kernel modules/extensions only providing the mapped addresses > of the PCI BAR's running together with the Measurement Routines using the > NI-DDK on Darwin (Mac OS X) and Linux. > > So, how can I map device addresses into user space on FreeBSD? > > > Best regards > > Rolf > > There is the following book : ----------------------------- http://www.amazon.com/FreeBSD-Device-Drivers-Guide-Intrepid/dp/1593272049/ref=sr_1_1?s=books&ie=UTF8&qid=1350180756&sr=1-1&keywords=9781593272043 http://nostarch.com/bsddrivers.htm FreeBSD Device Drivers Product Details Paperback: 352 pages Publisher: No Starch Press; Original edition (May 7, 2012) Language: English ISBN-10: 1593272049 ISBN-13: 978-1593272043 ----------------------------- I do not how much it can be useful for you , but it may be very helpful in details . Thank you very much . Mehmet Erol Sanliturk
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