Hello all,
I have a doubt regarding the difference between I/O Ports and I/O
Memory. I'm reading through LDD3 and it says I/O ports are consecutive
address in either memory address space or I/O address space through
which device registers can be accessed and I/O memory is a region of
RAM that the device makes available to the processor over the bus. I
would like to know as to which are the devices using I/O Ports and which
are the devices using I/O memory and why.
I'm trying to write a device driver for PCMCIA MC315+ data card on
i386 platform for kernel 2.6.18. I'm trying to access the Local
Configuration Registers made available by the device. By reading the CIS
from the device i am able to get address of I/O Space. Can someone tell
the kind of I/O access used for accessing these registers.
Thanks for your help.
Surej
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