1 files changed, 49 insertions, 0 deletions
diff --git a/sys/arch/i386/stand/libsa/ps2probe.h b/sys/arch/i386/stand/libsa/ps2probe.h
new file mode 100644
index 00000000000..9e7bd7a3f7b
--- /dev/null
+++ b/sys/arch/i386/stand/libsa/ps2probe.h
@@ -0,0 +1,49 @@
+/*	$OpenBSD: ps2probe.h,v 1.1 2001/08/18 15:34:17 mickey Exp $	*/
+
+/*
+ * Copyright (c) 2001 Michael Shalayeff
+ * 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Michael Shalayeff.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR OR HIS RELATIVES 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 MIND, 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.
+ */
+
+static __inline int
+ps2probe(void)
+{
+	char *p;
+	int r;
+
+	__asm __volatile(DOINT(0x15) "\n\t"
+			 "setc %b0\n\t"
+			 : "=a" (r), "=b" (p)
+			 : "0" (0xc000)
+			 : "%ecx", "cc");
+	if (!(r & 0xff))
+		return p[2];
+	else
+		return 0;
+}