/*      $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