/*      $NetBSD: prom.S,v 1.3 2008/04/28 20:23:29 martin Exp $  */

/*
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Wayne Knowles
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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 <mips/asm.h>
#include <mips/cpuregs.h>
#include <machine/prom.h>


LEAF(prom_restart)
       li      v0, MIPS_PROM_RESTART
       j       v0
       move    a0, zero
END(prom_restart)

NESTED(prom_open, CALLFRAME_SIZ, ra)
       .mask   0x80000000, -4
       subu    sp, sp, CALLFRAME_SIZ
       sw      ra, CALLFRAME_RA(sp)
       li      v0, MIPS_PROM_OPEN
       jal     v0
       nop
       /*
        * On return t0 contains our _iob structure
        * v0 contains the file descriptor number
        */
       la      t4, saiob
       sll     t5, v0, 2
       add     t4, t4, t5
       lw      ra, CALLFRAME_RA(sp)
       addu    sp, sp, CALLFRAME_SIZ
       sw      t0, 0(t4)
       j       ra
       nop
END(prom_open)

#ifndef LIBSA_NO_DEV_CLOSE
LEAF(prom_close)
       li      v0, MIPS_PROM_CLOSE
       j       v0
       nop
END(prom_close)
#endif

LEAF(prom_read)
       li      v0, MIPS_PROM_READ
       j       v0
       nop
END(prom_read)

#ifndef LIBSA_NO_FS_WRITE
LEAF(prom_write)
       li      v0, MIPS_PROM_WRITE
       j       v0
       nop
END(prom_write)
#endif

LEAF(printf)
       li      v0, MIPS_PROM_PRINTF
       j       v0
       nop
END(printf)

#ifndef NO_GETCHAR
LEAF(getchar)
       li      v0, MIPS_PROM_GETCHAR
       j       v0
       nop
END(getchar)

LEAF(putchar)
       li      v0, MIPS_PROM_PUTCHAR
       j       v0
       nop
END(putchar)
#endif

       .sdata

       .global saiob
saiob:  .space  8*4