1 /* $Id: pil.h,v 1.1.2.1 2002/03/03 10:31:56 davem Exp $ */ 2 #ifndef _SPARC64_PIL_H 3 #define _SPARC64_PIL_H 4 5 /* To avoid some locking problems, we hard allocate certain PILs 6 * for SMP cross call messages that must do a etrap/rtrap. 7 * 8 * A cli() does not block the cross call delivery, so when SMP 9 * locking is an issue we reschedule the event into a PIL interrupt 10 * which is blocked by cli(). 11 * 12 * In fact any XCALL which has to etrap/rtrap has a problem because 13 * it is difficult to prevent rtrap from running BH's, and that would 14 * need to be done if the XCALL arrived while %pil==15. 15 */ 16 #define PIL_SMP_CALL_FUNC 1 17 #define PIL_SMP_RECEIVE_SIGNAL 2 18 #define PIL_SMP_CAPTURE 3 19 20 #ifndef __ASSEMBLY__ 21 #define PIL_RESERVED(PIL) ((PIL) == PIL_SMP_CALL_FUNC || \ 22 (PIL) == PIL_SMP_RECEIVE_SIGNAL || \ 23 (PIL) == PIL_SMP_CAPTURE) 24 #endif 25 26 #endif /* !(_SPARC64_PIL_H) */ 27