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author | Ingo Molnar <mingo@elte.hu> | 2008-07-29 12:10:50 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-07-29 12:10:50 +0200 |
commit | 35780c8ea7ad5c6d5483244d5f5bf37176fda86a (patch) | |
tree | 2bc34969f558da2a9b3de915e3f2499a959085da /arch/sparc/include/asm/pil.h | |
parent | 6ce37a58e334ef773f88283939afc9f4965c7697 (diff) | |
parent | 6e86841d05f371b5b9b86ce76c02aaee83352298 (diff) |
Merge commit 'v2.6.27-rc1' into x86/urgent
Diffstat (limited to 'arch/sparc/include/asm/pil.h')
-rw-r--r-- | arch/sparc/include/asm/pil.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/pil.h b/arch/sparc/include/asm/pil.h new file mode 100644 index 00000000000..71819bb943f --- /dev/null +++ b/arch/sparc/include/asm/pil.h @@ -0,0 +1,22 @@ +#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 +#define PIL_SMP_CALL_FUNC_SNGL 6 + +#endif /* !(_SPARC64_PIL_H) */ |