extern void cvt_fd(float *from, double *to, unsigned long *fpscr);
extern void cvt_df(double *from, float *to, unsigned long *fpscr);
extern int call_rtas(const char *, int, int, unsigned long *, ...);
+extern int abs(int);
extern void cacheable_memzero(void *p, unsigned int nb);
extern int do_page_fault(struct pt_regs *, unsigned long, unsigned long);
extern void bad_page_fault(struct pt_regs *, unsigned long, int);