1/*        $NetBSD: prom.S,v 1.3 2008/04/28 20:23:29 martin 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 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <mips/asm.h>
33#include <mips/cpuregs.h>
34#include <machine/prom.h>
35
36
37LEAF(prom_restart)
38          li        v0, MIPS_PROM_RESTART
39          j         v0
40          move      a0, zero
41END(prom_restart)
42
43NESTED(prom_open, CALLFRAME_SIZ, ra)
44          .mask     0x80000000, -4
45          subu      sp, sp, CALLFRAME_SIZ
46          sw        ra, CALLFRAME_RA(sp)
47          li        v0, MIPS_PROM_OPEN
48          jal       v0
49          nop
50          /*
51           * On return t0 contains our _iob structure
52           * v0 contains the file descriptor number
53           */
54          la        t4, saiob
55          sll       t5, v0, 2
56          add       t4, t4, t5
57          lw        ra, CALLFRAME_RA(sp)
58          addu      sp, sp, CALLFRAME_SIZ
59          sw        t0, 0(t4)
60          j         ra
61          nop
62END(prom_open)
63
64#ifndef LIBSA_NO_DEV_CLOSE
65LEAF(prom_close)
66          li        v0, MIPS_PROM_CLOSE
67          j         v0
68          nop
69END(prom_close)
70#endif
71
72LEAF(prom_read)
73          li        v0, MIPS_PROM_READ
74          j         v0
75          nop
76END(prom_read)
77
78#ifndef LIBSA_NO_FS_WRITE
79LEAF(prom_write)
80          li        v0, MIPS_PROM_WRITE
81          j         v0
82          nop
83END(prom_write)
84#endif
85
86LEAF(printf)
87          li        v0, MIPS_PROM_PRINTF
88          j         v0
89          nop
90END(printf)
91
92#ifndef NO_GETCHAR
93LEAF(getchar)
94          li        v0, MIPS_PROM_GETCHAR
95          j         v0
96          nop
97END(getchar)
98
99LEAF(putchar)
100          li        v0, MIPS_PROM_PUTCHAR
101          j         v0
102          nop
103END(putchar)
104#endif
105
106          .sdata
107
108          .global   saiob
109saiob:    .space    8*4
110
111