blob: 0da88d10beffe1b3626f1998bb09798ef0d1724e (
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
47
48
49
|
/* console.c: Routines that deal with sending and receiving IO
* to/from the current console device using the PROM.
*
* Copyright (C) 1995 David S. Miller (davem@davemloft.net)
* Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <asm/openprom.h>
#include <asm/oplib.h>
#include <asm/system.h>
#include <linux/string.h>
extern int prom_stdin, prom_stdout;
/* Non blocking put character to console device, returns -1 if
* unsuccessful.
*/
static int prom_nbputchar(const char *buf)
{
unsigned long args[7];
args[0] = (unsigned long) "write";
args[1] = 3;
args[2] = 1;
args[3] = (unsigned int) prom_stdout;
args[4] = (unsigned long) buf;
args[5] = 1;
args[6] = (unsigned long) -1;
p1275_cmd_direct(args);
if (args[6] == 1)
return 0;
else
return -1;
}
/* Blocking version of put character routine above. */
void prom_putchar(const char *buf)
{
while (1) {
int err = prom_nbputchar(buf);
if (!err)
break;
}
}
|
