Most of the code is inspired on virtio driver.
rte_pci_ioport structure is filled at map time with anything needed for later
read / write calls.
At the moment, base field is used to store a x86 ioport (uint16_t) and will
be reused for other arches.
Signed-off-by: David Marchand <david.marchand@6wind.com>
Tested-by: Santosh Shukla <sshukla@mvista.com>
Reviewed-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
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