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bios.S revision 1.2 
      1 /*	$NetBSD: bios.S,v 1.2 2012/01/21 19:44:30 nonaka Exp $	*/
      2 
      3 /*-
      4  * Copyright (C) 2005 NONAKA Kimihiro <nonaka (at) netbsd.org>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include <machine/asm.h>
     29 
     30 /*
     31  * int getchar(void);
     32  */
     33 ENTRY(getchar)
     34 	mov	#0, r4
     35 	mov	#1, r0
     36 	trapa	#0x3f
     37 	rts
     38 	 nop
     39 
     40 /*
     41  * void putchar(int c);
     42  */
     43 ENTRY(putchar)
     44 	mov	#31, r0
     45 	trapa	#0x3f
     46 	rts
     47 	 nop
     48 
     49 /*
     50  * __dead void _rtt(void);
     51  */
     52 ENTRY(_rtt)
     53 	mov	#1, r4			/* reboot */
     54 	mov	#11, r0
     55 	trapa	#0x3f
     56 	mov.l	.L.start, r0
     57 	jmp	@r0
     58 	 nop
     59 
     60 .L.start:
     61 	.long	0xc0000000
     62