diff --git a/sys/sparc64/include/ktr.h b/sys/sparc64/include/ktr.h
new file mode 100644
index 000000000000..4b8e7df6a7a4
--- /dev/null
+++ b/sys/sparc64/include/ktr.h
@@ -0,0 +1,87 @@
+/*-
+ * Copyright (c) 1996 Berkeley Software Design, Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Berkeley Software Design Inc's name may not be used to endorse or
+ *    promote products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN INC BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	from BSDI $Id: ktr.h,v 1.10.2.7 2000/03/16 21:44:42 cp Exp $
+ * $FreeBSD$
+ */
+
+#ifndef _MACHINE_KTR_H_
+#define _MACHINE_KTR_H_
+
+#ifdef LOCORE
+
+#define	AND(var, mask, r1, r2, r3, l1) \
+	setx	var, r2, r1 ; \
+	setx	mask, r3, r2 ; \
+	lduw	[r1], r3 ; \
+	and	r2, r3, r1
+
+#define	TEST(var, mask, r1, r2, r3, l1) \
+	AND(var, mask, r1, r2, r3, l1) ; \
+	brz	r1, l1 ## f ; \
+	 nop
+
+/*
+ * XXX doesn't do timestamp or ktr_cpu.
+ */
+#define	ATR(desc, r1, r2, r3, l1, l2) \
+	.sect	.rodata ; \
+l1 ## :	.asciz	desc ; \
+	.previous ; \
+	set	ktr_idx, r1 ; \
+	lduw	[r1], r2 ; \
+l2 ## :	add	r2, 1, r3 ; \
+	casa	[r1] ASI_N, r2, r3 ; \
+	cmp	r2, r3 ; \
+	bne	%icc, l2 ## b ; \
+	 mov	r3, r2 ; \
+	set	ktr_buf, r1 ; \
+	mulx	r2, KTR_SIZEOF, r2 ; \
+	add	r1, r2, r1 ; \
+	set	l1 ## b, r2 ; \
+	stx	r2, [r1 + KTR_DESC]
+
+#define CATR(mask, desc, r1, r2, r3, l1, l2, l3) \
+	TEST(ktr_mask, mask, r1, r2, r3, l3) ; \
+	ATR(desc, r1, r2, r3, l1, l2)
+
+/*
+ * XXX crude conditional breakpoint and sir
+ */
+#define	CBPT(mask, r1, r2, r3, l1) \
+	TEST(ktr_mask, mask, r1, r2, r3, l1) ; \
+	DEBUGGER() ; \
+l1 ## :
+
+#define	CSIR(mask, r1, r2, r3, l1) \
+	TEST(ktr_mask, mask, r1, r2, r3, l1) ; \
+	sir	42 ; \
+l1 ## :
+
+#endif /* LOCORE */
+
+#endif /* !_MACHINE_KTR_H_ */