prom_translate_virt
extern int prom_translate_virt(caddr_t virt, int *valid,
(void) prom_translate_virt(vaddr, &valid, &paddr, &mode);
if ((prom_translate_virt(vaddr, &valid, &physaddr, &mode) != -1) &&
extern int prom_translate_virt(caddr_t virt, int *valid,
extern int prom_translate_virt(caddr_t virt, int *valid,