Provides "reboot" call, which just calles INT 19h to ask the bios to

reboot the machine.
This may be insufficient, but its enough for now.

sys/arch/i386/stand/lib/biosreboot.S

@@ -0,0 +1,66 @@
+/*	$NetBSD: biosreboot.S,v 1.1 1997/04/13 18:45:37 perry Exp $	*/
+
+/*
+ * Copyright (c) 1997
+ * 	Perry E. Metzger.  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 acknowledgements:
+ *	This product includes software developed for the NetBSD Project
+ *	by Perry E. Metzger.
+ * 4. The names of the authors 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 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.
+ *
+ */
+	
+
+#include <machine/asm.h>
+
+#define	data32	.byte 0x66
+
+	.text
+
+/* Call INT 19 to do the equivalent of CTL-ALT-DEL */
+
+ENTRY(reboot)
+	pushl	%ebp
+	movl	%esp,%ebp
+	pushl	%ebx
+	push	%esi
+	push	%edi
+
+	call	_C_LABEL(prot_to_real)
+
+	int	$0x19
+
+	/* NOTE: We should never even get past this point. */
+	
+	data32
+	call	_C_LABEL(real_to_prot)
+
+	movl	%ebx, %eax
+
+	pop	%edi
+	pop	%esi
+	popl	%ebx
+	popl	%ebp
+	ret