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| author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
| commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
| tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-sparc64/pil.h | |
| download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz | |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/asm-sparc64/pil.h')
| -rw-r--r-- | include/asm-sparc64/pil.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/asm-sparc64/pil.h b/include/asm-sparc64/pil.h new file mode 100644 index 000000000000..8f87750c3517 --- /dev/null +++ b/include/asm-sparc64/pil.h @@ -0,0 +1,26 @@ +/* $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 cli() 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 cli(). + * + * 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 + +#ifndef __ASSEMBLY__ +#define PIL_RESERVED(PIL) ((PIL) == PIL_SMP_CALL_FUNC || \ + (PIL) == PIL_SMP_RECEIVE_SIGNAL || \ + (PIL) == PIL_SMP_CAPTURE) +#endif + +#endif /* !(_SPARC64_PIL_H) */ |