[PATCH] hwmon: hwmon vs i2c, second round (05/11)
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / include / asm-sparc64 / pil.h
blob8f87750c351759cd97f0c5c8b93619162f38856f
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
5 /* To avoid some locking problems, we hard allocate certain PILs
6 * for SMP cross call messages that must do a etrap/rtrap.
8 * A cli() does not block the cross call delivery, so when SMP
9 * locking is an issue we reschedule the event into a PIL interrupt
10 * which is blocked by cli().
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.
16 #define PIL_SMP_CALL_FUNC 1
17 #define PIL_SMP_RECEIVE_SIGNAL 2
18 #define PIL_SMP_CAPTURE 3
20 #ifndef __ASSEMBLY__
21 #define PIL_RESERVED(PIL) ((PIL) == PIL_SMP_CALL_FUNC || \
22 (PIL) == PIL_SMP_RECEIVE_SIGNAL || \
23 (PIL) == PIL_SMP_CAPTURE)
24 #endif
26 #endif /* !(_SPARC64_PIL_H) */