pub fn map_memory_pre(
_phys: &Option<MemoryAddress>,
_virt: &Option<MemoryAddress>,
_size: usize,
_flags: MemoryFlags
) -> Result<(), Error>
pub fn map_memory_pre(
_phys: &Option<MemoryAddress>,
_virt: &Option<MemoryAddress>,
_size: usize,
_flags: MemoryFlags
) -> Result<(), Error>