diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-28 08:33:25 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-28 08:33:25 -0700 |
| commit | c32f1a34ff1097110469a240ea4539dc9c101e96 (patch) | |
| tree | eda863205e83afe54cbedcf15cdac416cdec2cf5 /arch/sparc/include/asm/pil.h | |
| parent | 4f31f3080943c7e3541f07df326f06d598a067d0 (diff) | |
| parent | 04d91cb8163f7f946e348b2362a6e5dfa5f06b13 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
sparc: Set CONFIG_HAVE_ARCH_TRACEHOOK
sparc: Add task_pt_regs().
sparc: Add call to tracehook_signal_handler().
sparc: Create and use TIF_NOTIFY_RESUME.
sparc: Use tracehook routines in syscall_trace().
sparc64: tracehook: CONFIG_HAVE_ARCH_TRACEHOOK
sparc: Add user_stack_pointer().
sparc64: tracehook_signal_handler
sparc64: tracehook: TIF_NOTIFY_RESUME
sparc: Add asm/syscall.h
sparc64: tracehook syscall
sparc: enable headers_export again
sparc, sparc64: use arch/sparc/include
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) */ |