Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* $Id: pil.h,v 1.1 2002/01/23 11:27:36 davem Exp $ */ |
2 | #ifndef _SPARC64_PIL_H | |
3 | #define _SPARC64_PIL_H | |
4 | ||
5 | /* To avoid some locking problems, we hard allocate certain PILs | |
6 | * for SMP cross call messages that must do a etrap/rtrap. | |
7 | * | |
fd0504c3 DM |
8 | * A local_irq_disable() does not block the cross call delivery, so |
9 | * when SMP locking is an issue we reschedule the event into a PIL | |
10 | * interrupt which is blocked by local_irq_disable(). | |
1da177e4 LT |
11 | * |
12 | * In fact any XCALL which has to etrap/rtrap has a problem because | |
13 | * it is difficult to prevent rtrap from running BH's, and that would | |
14 | * need to be done if the XCALL arrived while %pil==15. | |
15 | */ | |
16 | #define PIL_SMP_CALL_FUNC 1 | |
17 | #define PIL_SMP_RECEIVE_SIGNAL 2 | |
18 | #define PIL_SMP_CAPTURE 3 | |
ee29074d | 19 | #define PIL_SMP_CTX_NEW_VERSION 4 |
fd0504c3 | 20 | #define PIL_DEVICE_IRQ 5 |
1da177e4 LT |
21 | |
22 | #ifndef __ASSEMBLY__ | |
23 | #define PIL_RESERVED(PIL) ((PIL) == PIL_SMP_CALL_FUNC || \ | |
24 | (PIL) == PIL_SMP_RECEIVE_SIGNAL || \ | |
ee29074d DM |
25 | (PIL) == PIL_SMP_CAPTURE || \ |
26 | (PIL) == PIL_SMP_CTX_NEW_VERSION) | |
1da177e4 LT |
27 | #endif |
28 | ||
29 | #endif /* !(_SPARC64_PIL_H) */ |