The following is a list of PIO kernel services:
| io_map | Attaches to an I/O mapping |
| io_map_clear | Removes an I/O mapping segment |
| io_map_init | Creates and initializes an I/O mapping segment |
| io_unmap | Detaches from an I/O mapping |
These kernel services are defined in the adspace.h and ioacc.h header files.
For a list of PIO macros, see Programmed I/O Services in Understanding the Diagnostic Subsystem for AIX.