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what is memory mapped / IO mapped ? Which calls used for
this to access any hardware address in linux device driver ?

Question Posted / sumeet4interview

Answers were Sorted based on User's Feedback



what is memory mapped / IO mapped ? Which calls used for this to access any hardware address in lin..

Answer / kiran

In the case of memory mapped I/O, CPU treats the IO
peripherals as similar to memory locations and use memory
read and memory write instrcutions.

Where as in case of IO mapped IO there is separated address
space and separate instructions like IN and Out to access
IO mapped IO devices.

Is This Answer Correct ?    13 Yes 1 No

what is memory mapped / IO mapped ? Which calls used for this to access any hardware address in lin..

Answer / shafi

Memory mapped uses the same address space as the RAM.
I0 mapped as there own address space

Is This Answer Correct ?    4 Yes 0 No

what is memory mapped / IO mapped ? Which calls used for this to access any hardware address in lin..

Answer / naveen

io mapped

Is This Answer Correct ?    2 Yes 2 No

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