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- /* $Id: pil.h,v 1.1 2002/01/23 11:27:36 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 local_irq_disable() 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 local_irq_disable().
- *
- * 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
- #define PIL_SMP_CTX_NEW_VERSION 4
- #define PIL_DEVICE_IRQ 5
- #ifndef __ASSEMBLY__
- #define PIL_RESERVED(PIL) ((PIL) == PIL_SMP_CALL_FUNC || \
- (PIL) == PIL_SMP_RECEIVE_SIGNAL || \
- (PIL) == PIL_SMP_CAPTURE || \
- (PIL) == PIL_SMP_CTX_NEW_VERSION)
- #endif
- #endif /* !(_SPARC64_PIL_H) */
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