| /* $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) */ |
