| /* $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) */ |