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prom.S revision 1.2 
      1 /*	$NetBSD: prom.S,v 1.2 2000/09/26 09:32:25 wdk Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2000 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Wayne Knowles
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <mips/asm.h>
     40 #include <mips/cpuregs.h>
     41 #include <machine/prom.h>
     42 
     43 
     44 LEAF(prom_restart)
     45 	li	v0, MIPS_PROM_RESTART
     46 	j	v0
     47 	move	a0, zero
     48 END(prom_restart)
     49 
     50 NESTED(prom_open, CALLFRAME_SIZ, ra)
     51 	.mask	0x80000000, -4
     52 	subu	sp, sp, CALLFRAME_SIZ
     53 	sw	ra, CALLFRAME_RA(sp)
     54 	li	v0, MIPS_PROM_OPEN
     55 	jal	v0
     56 	nop
     57 	/*
     58 	 * On return t0 contains our _iob structure
     59 	 * v0 contains the file descriptor number
     60 	 */
     61 	la	t4, saiob
     62 	sll	t5, v0, 2
     63 	add	t4, t4, t5
     64 	lw	ra, CALLFRAME_RA(sp)
     65 	addu	sp, sp, CALLFRAME_SIZ
     66 	sw	t0, 0(t4)
     67 	j	ra
     68 	nop
     69 END(prom_open)
     70 
     71 #ifndef LIBSA_NO_DEV_CLOSE
     72 LEAF(prom_close)
     73 	li	v0, MIPS_PROM_CLOSE
     74 	j	v0
     75 	nop
     76 END(prom_close)
     77 #endif
     78 
     79 LEAF(prom_read)
     80 	li	v0, MIPS_PROM_READ
     81 	j	v0
     82 	nop
     83 END(prom_read)
     84 
     85 #ifndef LIBSA_NO_FS_WRITE
     86 LEAF(prom_write)
     87 	li	v0, MIPS_PROM_WRITE
     88 	j	v0
     89 	nop
     90 END(prom_write)
     91 #endif
     92 
     93 LEAF(printf)
     94 	li	v0, MIPS_PROM_PRINTF
     95 	j	v0
     96 	nop
     97 END(printf)
     98 
     99 #ifndef NO_GETCHAR
    100 LEAF(getchar)
    101 	li	v0, MIPS_PROM_GETCHAR
    102 	j	v0
    103 	nop
    104 END(getchar)
    105 
    106 LEAF(putchar)
    107 	li	v0, MIPS_PROM_PUTCHAR
    108 	j	v0
    109 	nop
    110 END(putchar)
    111 #endif
    112 
    113 	.sdata
    114 
    115 	.global	saiob
    116 saiob:	.space	8*4
    117 
    118