0.3.5/doc/hello_mips.c

/*
 *  $Id: hello_mips.c,v 1.3 2005/08/09 18:29:20 debug Exp $
 *
 *  MIPS Hello World for GXemul.
 *
 *  Compile:
 *      mips64-unknown-elf-gcc -O2 hello_mips.c -mips4 -mabi=64 -c
 *
 *  and link:
 *      mips64-unknown-elf-ld -Ttext 0xa800000000030000 -e f
 *              hello_mips.o -o hello_mips --oformat=elf64-bigmips
 *
 *  Run:
 *      gxemul -E testmips hello_mips
 */

/*  Note: The cast to a signed int causes the address to be sign-extended
    correctly to 0xffffffffb00000xx when compiled in 64-bit mode  */
#define PUTCHAR_ADDRESS         ((signed int)0xb0000000)
#define HALT_ADDRESS            ((signed int)0xb0000010)

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	dpavlin	12	/*
2			* $Id: hello_mips.c,v 1.3 2005/08/09 18:29:20 debug Exp $
3			*
4			* MIPS Hello World for GXemul.
5			*
6			* Compile:
7			* mips64-unknown-elf-gcc -O2 hello_mips.c -mips4 -mabi=64 -c
8			*
9			* and link:
10			* mips64-unknown-elf-ld -Ttext 0xa800000000030000 -e f
11			* hello_mips.o -o hello_mips --oformat=elf64-bigmips
12			*
13			* Run:
14			* gxemul -E testmips hello_mips
15			*/
16	dpavlin	2
17			/* Note: The cast to a signed int causes the address to be sign-extended
18			correctly to 0xffffffffb00000xx when compiled in 64-bit mode */
19			#define PUTCHAR_ADDRESS ((signed int)0xb0000000)
20			#define HALT_ADDRESS ((signed int)0xb0000010)
21
22			void printchar(char ch)
23			{
24			((volatile unsigned char ) PUTCHAR_ADDRESS) = ch;
25			}
26
27			void halt(void)
28			{
29			((volatile unsigned char ) HALT_ADDRESS) = 0;
30			}
31
32			void printstr(char *s)
33			{
34			while (*s)
35			printchar(*s++);
36			}
37
38			void f(void)
39			{
40			printstr("Hello world\n");
41			halt();
42			}
43	dpavlin	12