Description of a uio memory region
struct uio_mem {
const char * name;
phys_addr_t addr;
unsigned long size;
int memtype;
void __iomem * internal_addr;
struct uio_map * map;
};
name
name of the memory region for identification
addr
address of the device's memory (phys_addr is used since addr can be logical, virtual, or physical & phys_addr_t should always be large enough to handle any of the address types)
size
size of IO
memtype
type of memory addr points to
internal_addr
ioremap-ped version of addr, for driver internal use
map
for use by the UIO core only.