Date: Thu, 3 Jan 2013 14:45:29 -0200 From: "Dr. Rolf Jansen" <rj@cyclaero.com> To: freebsd-drivers@freebsd.org Subject: How to map device addresses into user space Message-ID: <DFC983B8-91B2-4ED8-89B0-FC4BD4AB2576@cyclaero.com>
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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
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