/*      $NetBSD: biosrw.s,v 1.1 2002/02/24 20:51:07 leo Exp $   */

/*
* Copyright (c) 1995 Waldi Ravens.
* 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 Waldi Ravens.
* 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 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.
*/

/* int  bios_read(buffer, offset, count, dev)   */

       .globl  _bios_read
       .text
       .even

_bios_read:
       movml   d1-d2/a1-a2,sp@-
       movl    sp@(24),sp@-            | offset
       movw    sp@(38),sp@-            | device
       movw    #-1,sp@-
       movw    sp@(38),sp@-            | count
       movl    sp@(30),sp@-            | buffer
       movw    #8,sp@-                 | read, physical mode
       movw    #4,sp@-
       trap    #13                     | Rwabs()
       lea     sp@(18),sp
       movml   sp@+,d1-d2/a1-a2
       rts

/* int  bios_write(buffer, offset, count, dev)  */

       .globl  _bios_write
       .text
       .even

_bios_write:
       movml   d1-d2/a1-a2,sp@-
       movl    sp@(20),sp@-            | offset
       movw    sp@(34),sp@-            | device
       movw    #-1,sp@-
       movw    sp@(34),sp@-            | count
       movl    sp@(26),sp@-            | buffer
       movw    #9,sp@-                 | write, physical mode
       movw    #4,sp@-
       trap    #13                     | Rwabs()
       lea     sp@(18),sp
       movml   sp@+,d1-d2/a1-a2
       rts

/* int  bios_critic(error)                      */

       .globl  _bios_critic
       .text
       .even

_bios_critic:
       movw    sp@(4),d0
       extl    d0
       rts