extern char *prom_getcmdline(void);
extern char *prom_getenv(char *name);
-extern void setup_prom_printf(int tty_no);
-extern void prom_printf(char *fmt, ...);
extern void prom_init_cmdline(void);
extern void prom_meminit(void);
extern void prom_fixup_mem_map(unsigned long start_mem, unsigned long end_mem);