filename | src/dcload.c |
changeset | 120:7e4549476110 |
prev | 106:9048bac046c3 |
next | 182:e3b513538548 |
author | nkeynes |
date | Mon May 15 08:28:52 2006 +0000 (17 years ago) |
permissions | -rw-r--r-- |
last change | Rename video_driver to display_driver Add input source to display Implement configuration file support Hook controllers up to configuration |
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1 /**
2 * $Id: dcload.c,v 1.3 2006-03-20 11:59:57 nkeynes Exp $
3 *
4 * DC-load syscall implementation.
5 *
6 * Copyright (c) 2005 Nathan Keynes.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 */
19 #include <stdio.h>
20 #include "dream.h"
21 #include "mem.h"
22 #include "syscall.h"
23 #include "sh4/sh4core.h"
25 #define SYS_READ 0
26 #define SYS_WRITE 1
27 #define SYS_OPEN 2
28 #define SYS_CLOSE 3
29 #define SYS_CREAT 4
30 #define SYS_LINK 5
31 #define SYS_UNLINK 6
32 #define SYS_CHDIR 7
33 #define SYS_CHMOD 8
34 #define SYS_LSEEK 9
35 #define SYS_FSTAT 10
36 #define SYS_TIME 11
37 #define SYS_STAT 12
38 #define SYS_UTIME 13
39 #define SYS_ASSIGNWRKMEM 14
40 #define SYS_EXIT 15
41 #define SYS_OPENDIR 16
42 #define SYS_CLOSEDIR 17
43 #define SYS_READDIR 18
44 #define SYS_GETHOSTINFO 19
46 #define SYS_MAGIC 0xDEADBEEF
47 #define SYS_MAGIC_ADDR 0x8c004004
48 #define SYSCALL_ADDR 0x8c004008
50 void dcload_syscall( uint32_t syscall_id )
51 {
52 uint32_t syscall = sh4r.r[4];
53 switch( sh4r.r[4] ) {
54 case SYS_READ:
55 if( sh4r.r[5] == 0 ) {
56 char *buf = mem_get_region( sh4r.r[6] );
57 int length = sh4r.r[7];
58 sh4r.r[0] = read( 0, buf, length );
59 } else {
60 sh4r.r[0] = -1;
61 }
62 break;
63 case SYS_WRITE:
64 if( sh4r.r[5] == 1 || sh4r.r[5] == 2 ) {
65 char *buf = mem_get_region( sh4r.r[6] );
66 int length = sh4r.r[7];
67 sh4r.r[0] = write( sh4r.r[5], buf, length );
68 } else {
69 sh4r.r[0] = -1;
70 }
71 break;
72 case SYS_EXIT:
73 /* exit( sh4r.r[4] ); */
74 dreamcast_stop();
75 default:
76 sh4r.r[0] = -1;
77 }
79 }
81 void dcload_install()
82 {
83 syscall_add_hook_vector( 0xF0, SYSCALL_ADDR, dcload_syscall );
84 sh4_write_long( SYS_MAGIC_ADDR, SYS_MAGIC );
85 }
.