HelenOS sources

pio_change_64     167 uspace/lib/c/include/ddi.h static inline uint64_t pio_change_64(ioport64_t *reg, uint64_t val,
pio_change_64     167 uspace/lib/posix/include/libc/ddi.h static inline uint64_t pio_change_64(ioport64_t *reg, uint64_t val,
HelenOS homepage, sources at GitHub