2 * $Id: dcload.c,v 1.5 2006-07-06 22:44:39 nkeynes Exp $
4 * DC-load syscall implementation.
6 * Copyright (c) 2005 Nathan Keynes.
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.
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.
21 #include "dreamcast.h"
24 #include "sh4/sh4core.h"
40 #define SYS_ASSIGNWRKMEM 14
42 #define SYS_OPENDIR 16
43 #define SYS_CLOSEDIR 17
44 #define SYS_READDIR 18
45 #define SYS_GETHOSTINFO 19
47 #define SYS_MAGIC 0xDEADBEEF
48 #define SYS_MAGIC_ADDR 0x8c004004
49 #define SYSCALL_ADDR 0x8c004008
51 static gboolean dcload_allow_exit = FALSE;
53 void dcload_set_allow_exit( gboolean allow )
55 dcload_allow_exit = allow;
58 void dcload_syscall( uint32_t syscall_id )
60 uint32_t syscall = sh4r.r[4];
63 if( sh4r.r[5] == 0 ) {
64 char *buf = mem_get_region( sh4r.r[6] );
65 int length = sh4r.r[7];
66 sh4r.r[0] = read( 0, buf, length );
72 if( sh4r.r[5] == 1 || sh4r.r[5] == 2 ) {
73 char *buf = mem_get_region( sh4r.r[6] );
74 int length = sh4r.r[7];
75 sh4r.r[0] = write( sh4r.r[5], buf, length );
81 if( dcload_allow_exit )
93 syscall_add_hook_vector( 0xF0, SYSCALL_ADDR, dcload_syscall );
94 sh4_write_long( SYS_MAGIC_ADDR, SYS_MAGIC );
.