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1da177e4 LT |
1 | #ifndef _SPARC64_PIL_H |
2 | #define _SPARC64_PIL_H | |
3 | ||
4 | /* To avoid some locking problems, we hard allocate certain PILs | |
5 | * for SMP cross call messages that must do a etrap/rtrap. | |
6 | * | |
fd0504c3 DM |
7 | * A local_irq_disable() does not block the cross call delivery, so |
8 | * when SMP locking is an issue we reschedule the event into a PIL | |
9 | * interrupt which is blocked by local_irq_disable(). | |
1da177e4 LT |
10 | * |
11 | * In fact any XCALL which has to etrap/rtrap has a problem because | |
12 | * it is difficult to prevent rtrap from running BH's, and that would | |
13 | * need to be done if the XCALL arrived while %pil==15. | |
14 | */ | |
15 | #define PIL_SMP_CALL_FUNC 1 | |
16 | #define PIL_SMP_RECEIVE_SIGNAL 2 | |
17 | #define PIL_SMP_CAPTURE 3 | |
ee29074d | 18 | #define PIL_SMP_CTX_NEW_VERSION 4 |
fd0504c3 | 19 | #define PIL_DEVICE_IRQ 5 |
1da177e4 | 20 | |
1da177e4 | 21 | #endif /* !(_SPARC64_PIL_H) */ |