[ILUG] linux device drivers: port or memory mapped i/o?

From: Stephen Shirley (diamond at domain skynet.ie)
Date: Tue 16 Oct 2001 - 15:46:16 IST

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Mornin,
        I have to write a device driver for a chip which allows both port
mapped and memory mapped i/o. Now I know that memory mapped is easier for
the programmer (can use any instruction that can access memory, don't need
to copy out data to look at it etc), but i was wondering was there any
particular reasons why people would choose one over the other.

TIA,
Steve

-- 
"My mom had Windows at work and it hurt her eyes real bad"

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