pil.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:1k
- /* $Id: pil.h,v 1.1.2.1 2002/03/03 10:31:56 davem Exp $ */
- #ifndef _SPARC64_PIL_H
- #define _SPARC64_PIL_H
- /* To avoid some locking problems, we hard allocate certain PILs
- * for SMP cross call messages that must do a etrap/rtrap.
- *
- * A cli() does not block the cross call delivery, so when SMP
- * locking is an issue we reschedule the event into a PIL interrupt
- * which is blocked by cli().
- *
- * In fact any XCALL which has to etrap/rtrap has a problem because
- * it is difficult to prevent rtrap from running BH's, and that would
- * need to be done if the XCALL arrived while %pil==15.
- */
- #define PIL_SMP_CALL_FUNC 1
- #define PIL_SMP_RECEIVE_SIGNAL 2
- #define PIL_SMP_CAPTURE 3
- #ifndef __ASSEMBLY__
- #define PIL_RESERVED(PIL) ((PIL) == PIL_SMP_CALL_FUNC ||
- (PIL) == PIL_SMP_RECEIVE_SIGNAL ||
- (PIL) == PIL_SMP_CAPTURE)
- #endif
- #endif /* !(_SPARC64_PIL_H) */