diff options
Diffstat (limited to 'include/asm-sparc64/pil.h')
-rw-r--r-- | include/asm-sparc64/pil.h | 22 |
1 files changed, 1 insertions, 21 deletions
diff --git a/include/asm-sparc64/pil.h b/include/asm-sparc64/pil.h index eaac842d88c..d805f33f1e0 100644 --- a/include/asm-sparc64/pil.h +++ b/include/asm-sparc64/pil.h | |||
@@ -1,21 +1 @@ | |||
1 | #ifndef _SPARC64_PIL_H | #include <asm-sparc/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 | * | ||
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(). | ||
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 | ||
18 | #define PIL_SMP_CTX_NEW_VERSION 4 | ||
19 | #define PIL_DEVICE_IRQ 5 | ||
20 | |||
21 | #endif /* !(_SPARC64_PIL_H) */ | ||