gbasys

view src/syscall.c @ 2:e3dc7705ad9c

communications stuff
author John Tsiombikas <nuclear@member.fsf.org>
date Wed, 07 Mar 2012 06:11:51 +0200
parents 875ef6085efc
children 72c6429ae953
line source
1 /*
2 Copyright 2004 John Tsiombikas <nuclear@siggraph.org>
4 This file is part of gbasys, a library for GameBoy Advance development.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
21 #include "config.h"
23 #include <stdio.h>
24 #include <stdarg.h>
25 #include "syscall.h"
27 void halt(void)
28 {
29 __syscall(2);
30 }
32 void stop(void)
33 {
34 __syscall(3);
35 }
37 void print_vba(const char *str, ...)
38 {
39 char buf[128];
40 va_list arg_list;
42 va_start(arg_list, str);
43 vsnprintf(buf, 128, str, arg_list);
44 va_end(arg_list);
46 __asm__ __volatile__(
47 "mov r0, %0\n\t"
48 "swi 0xff0000\n\t" :
49 : "r" (buf)
50 : "r0"
51 );
52 }