void *prom_claim (void *virt, unsigned int size, unsigned int align);
void prom_release(void *virt, unsigned int size);
void prom_map (void *phys, void *virt, int size);
void *prom_claim (void *virt, unsigned int size, unsigned int align);
void prom_release(void *virt, unsigned int size);
void prom_map (void *phys, void *virt, int size);