Date: Thu, 23 Oct 1997 09:46:58 +0200 (MEST) From: Christoph Kukulies <kuku@gilberto.physik.RWTH-Aachen.DE> To: freebsd-hackers@freefall.FreeBSD.org Subject: need help in ISA memory mapping Message-ID: <199710230746.JAA13974@gil.physik.rwth-aachen.de>
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I have an industrial controller card (ISA) which has an ISA memory window (0xc8000-0xcffff e.g.). A user program should be able to directly read/write into these memory locations via a pointer (byte or word). Is there a way tp 'map' this into a user address space? Is it possible at all? I can use the isa_dev structure in the kernel driver (I have written a minimum driver that probes the card) but this only works in kernel mode. I thoughht of opening /dev/mem but that appears to be handled like a file and operationg via a pointer seems weird. Even weirder when I thing of mmapping that file. Any ideas? -- Chris Christoph P. U. Kukulies kuku@gil.physik.rwth-aachen.de
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