Inspired by what they're doing over in rust-osdev/volatile#22, we probably want the following:
- Address "map": reads the address into memory, runs a closure that gets
&mut T, then writes back the new T value.
- Block "copy from slice": copies data from a slice into the block.
- Block "fill": write a value to all elements in a block.
Inspired by what they're doing over in rust-osdev/volatile#22, we probably want the following:
&mut T, then writes back the newTvalue.