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) */