demos/hello/hello.c

/*
 *  $Id: hello.c,v 1.3 2006/05/22 04:53:52 debug Exp $
 *
 *  GXemul demo:  Hello World
 *
 *  This file is in the Public Domain.
 */

#include "dev_cons.h"


#ifdef MIPS
/*  Note: The ugly cast to a signed int (32-bit) causes the address to be
        sign-extended correctly on MIPS when compiled in 64-bit mode  */
#define PHYSADDR_OFFSET         ((signed int)0xa0000000)
#else
#define PHYSADDR_OFFSET         0
#endif


#define PUTCHAR_ADDRESS         (PHYSADDR_OFFSET +              \
                                DEV_CONS_ADDRESS + DEV_CONS_PUTGETCHAR)
#define HALT_ADDRESS            (PHYSADDR_OFFSET +              \
                                DEV_CONS_ADDRESS + DEV_CONS_HALT)


void printchar(char ch)
{
        *((volatile unsigned char *) PUTCHAR_ADDRESS) = ch;
}


void halt(void)
{
        *((volatile unsigned char *) HALT_ADDRESS) = 0;
}


void printstr(char *s)
{
        while (*s)
                printchar(*s++);
}


void f(void)
{
        printstr("Hello world\n");
        halt();
}

1	/*
2	* $Id: hello.c,v 1.3 2006/05/22 04:53:52 debug Exp $
3	*
4	* GXemul demo: Hello World
5	*
6	* This file is in the Public Domain.
7	*/
8
9	#include "dev_cons.h"
10
11
12	#ifdef MIPS
13	/* Note: The ugly cast to a signed int (32-bit) causes the address to be
14	sign-extended correctly on MIPS when compiled in 64-bit mode */
15	#define PHYSADDR_OFFSET ((signed int)0xa0000000)
16	#else
17	#define PHYSADDR_OFFSET 0
18	#endif
19
20
21	#define PUTCHAR_ADDRESS (PHYSADDR_OFFSET + \
22	DEV_CONS_ADDRESS + DEV_CONS_PUTGETCHAR)
23	#define HALT_ADDRESS (PHYSADDR_OFFSET + \
24	DEV_CONS_ADDRESS + DEV_CONS_HALT)
25
26
27	void printchar(char ch)
28	{
29	((volatile unsigned char ) PUTCHAR_ADDRESS) = ch;
30	}
31
32
33	void halt(void)
34	{
35	((volatile unsigned char ) HALT_ADDRESS) = 0;
36	}
37
38
39	void printstr(char *s)
40	{
41	while (*s)
42	printchar(*s++);
43	}
44
45
46	void f(void)
47	{
48	printstr("Hello world\n");
49	halt();
50	}
51