isa_intr_check(), alpha style.

1 files changed, 25 insertions, 1 deletions

diff --git a/sys/arch/alpha/dev/shared_intr.c b/sys/arch/alpha/dev/shared_intr.c
index 3bda076be0c..bc547ccd8bd 100644
--- a/sys/arch/alpha/dev/shared_intr.c
+++ b/sys/arch/alpha/dev/shared_intr.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: shared_intr.c,v 1.2 1997/11/10 15:53:08 niklas Exp $	*/
+/*	$OpenBSD: shared_intr.c,v 1.3 1998/06/29 05:32:50 downsj Exp $	*/
 /*	$NetBSD: shared_intr.c,v 1.1 1996/11/17 02:03:08 cgd Exp $	*/
 
 /*
@@ -115,6 +115,30 @@ alpha_shared_intr_dispatch(intr, num)
 	return (handled);
 }
 
+int
+alpha_shared_intr_check(intr, num, type)
+	struct alpha_shared_intr *intr;
+	unsigned int num;
+	int type;
+{
+	if (intr[num].intr_sharetype == IST_UNUSABLE)
+		return (0);
+
+	switch (intr[num].intr_sharetype) {
+	case IST_EDGE:
+	case IST_LEVEL:
+		if (type == intr[num].intr_sharetype)
+			break;
+	case IST_PULSE:
+		if ((type != IST_NONE) && (intr[num].intr_q.tqh_first != NULL))
+				return (0);
+	case IST_NONE:
+		break;
+	}
+
+	return (1);
+}
+
 void *
 alpha_shared_intr_establish(intr, num, type, level, fn, arg, basename)
 	struct alpha_shared_intr *intr;