On Mon, Apr 12, 2010 at 07:47:31PM +0100, Dave Korn wrote: > On 12/04/2010 19:04, Andrew Haley wrote: > > > I was thinking about non-memory-mapped I/O, a la x86 I/O ports. > > I've always thought that was a bad misnomer. Isn't it just an alternative > memory-mapped address space pretty much like main memory (regardless that the > mapped devices may have some fairly non-standard characteristics)? Certainly > from the compiler's point of view it's got to count as "memory"; it's > somewhere values come from and go to and are "externally visible".
Then you can think about it as "does not alias any non-device memory", or any number of variants on that. -- Daniel Jacobowitz CodeSourcery
