extern LONG ArcWrite(ULONG fd, PVOID buf, ULONG num, PULONG cnt);
/* Misc. routines. */
+extern VOID ArcHalt(VOID) __noreturn;
+extern VOID ArcPowerDown(VOID) __noreturn;
+extern VOID ArcRestart(VOID) __noreturn;
extern VOID ArcReboot(VOID) __noreturn;
extern VOID ArcEnterInteractiveMode(VOID) __noreturn;
extern VOID ArcFlushAllCaches(VOID);