summaryrefslogtreecommitdiff
path: root/src/console/printk.c
blob: 886e2cfa727061733e4b5daf7a118a577cdf4f72 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
/*
 *  blantantly copied from linux/kernel/printk.c
 *
 *  Copyright (C) 1991, 1992  Linus Torvalds
 *
 */

#include <stdarg.h>
#include <smp/spinlock.h>
#include <console/vtxprintf.h>
#include <console/console.h>

/* printk's without a loglevel use this.. */
#define DEFAULT_MESSAGE_LOGLEVEL 4 /* BIOS_WARNING */

/* We show everything that is MORE important than this.. */
#define MINIMUM_CONSOLE_LOGLEVEL 1 /* Minimum loglevel we let people use */

/* Keep together for sysctl support */

int console_loglevel = CONFIG_DEFAULT_CONSOLE_LOGLEVEL;
int default_console_loglevel = CONFIG_DEFAULT_CONSOLE_LOGLEVEL;

DECLARE_SPIN_LOCK(console_lock)

int do_printk(int msg_level, const char *fmt, ...)
{
	va_list args;
	int i;

	if (msg_level > console_loglevel) {
		return 0;
	}

	spin_lock(&console_lock);

	va_start(args, fmt);
	i = vtxprintf(console_tx_byte, fmt, args);
	va_end(args);

	console_tx_flush();

	spin_unlock(&console_lock);

	return i;
}