Directly accessing I/O ports
gallen at arlut.utexas.edu
Fri Jul 19 10:06:12 EST 2002
I'd like to get the Linux ethernet card diagnostic tool,
eepro100-diag.c (from http://www.scyld.com/diag/index.html) running
on the PowerPC.
Unfortunately, it uses iopl() and inw()/outw()/inl()/outl() to access
the entire I/O port space directly in userland. In fact, much of this
family of utils does the same thing.
I tried something like:
io_fd = open("/dev/port", O_RDWR);
iobase = mmap(0, device_size, PROT_READ|PROT_WRITE, MAP_SHARED,
but I can't get it to work.
Are there suggestions (or code snippets) as to how I should proceed?
For that matter, what's the *right* way to access this sort of thing
Gregory E. Allen, MSEE Engineering Scientist
Applied Research Laboratories: The University of Texas at Austin
Please help find my missing daughter: http://FindSabrina.org/
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