util.c File Reference

#include <stdarg.h>
#include "util.h"

Macros
#define	SERIAL_BASE   0x3f8
#define	BASE(ROW)   ((unsigned short *) (0xb8000+ROW*160))

Functions
void	wait (int ms)
	Wait roughly a given number of milliseconds.
void	__exit (unsigned status)
	Print the exit status and reboot the machine.
void	serial_init ()
int	out_char (unsigned value)
	Output a single char.
void	out_string (const char *value)
	Output a string.
void	out_hex (unsigned value, unsigned bitlen)
	Output a single hex value.
void	out_description (const char *prefix, unsigned int value)
	Output a string followed by a single hex value, prefixed with a message label.
void	out_info (const char *msg)
	Output a string, prefixed with a message label.
int	strcmp (char const *s1, char const *s2)
int	isspace (int c)
unsigned long	strtoul (char const *ptr, char const **end, int base)
char *	get_arg (char **line, char delim)

Macro Definition Documentation

#define BASE

(

ROW

)

((unsigned short *) (0xb8000+ROW*160))

#define SERIAL_BASE   0x3f8

Function Documentation

void __exit

(

unsigned

status

)

Print the exit status and reboot the machine.

char* get_arg	(	char **	line,
		char	delim
	)

int isspace

(

int

c

)

int out_char

(

unsigned

value

)

Output a single char.

lowlevel output functions

Note: We allow only to put a char on the last line.

void out_description	(	const char *	prefix,
		unsigned int	value
	)

Output a string followed by a single hex value, prefixed with a message label.

void out_hex	(	unsigned	value,
		unsigned	bitlen
	)

Output a single hex value.

void out_info

(

const char *

msg

)

Output a string, prefixed with a message label.

void out_string

(

const char *

value

)

Output a string.

void serial_init

(

void

)

int strcmp	(	char const *	s1,
		char const *	s2
	)

unsigned long strtoul	(	char const *	ptr,
		char const **	end,
		int	base
	)

void wait

(

int

ms

)

Wait roughly a given number of milliseconds.

Helper functions.

We use the PIT for this.