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/arch/powerpc/boot/ofconsole.c

http://github.com/mirrors/linux
C | 43 lines | 30 code | 7 blank | 6 comment | 4 complexity | faf094324c5d594ec1a730ea23ceb5ab MD5 | raw file
 1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 * OF console routines
 4 *
 5 * Copyright (C) Paul Mackerras 1997.
 6 */
 7#include <stddef.h>
 8#include "types.h"
 9#include "elf.h"
10#include "string.h"
11#include "stdio.h"
12#include "page.h"
13#include "ops.h"
14
15#include "of.h"
16
17static unsigned int of_stdout_handle;
18
19static int of_console_open(void)
20{
21	void *devp;
22
23	if (((devp = of_finddevice("/chosen")) != NULL)
24	    && (of_getprop(devp, "stdout", &of_stdout_handle,
25			   sizeof(of_stdout_handle))
26		== sizeof(of_stdout_handle))) {
27		of_stdout_handle = be32_to_cpu(of_stdout_handle);
28		return 0;
29	}
30
31	return -1;
32}
33
34static void of_console_write(const char *buf, int len)
35{
36	of_call_prom("write", 3, 1, of_stdout_handle, buf, len);
37}
38
39void of_console_init(void)
40{
41	console_ops.open = of_console_open;
42	console_ops.write = of_console_write;
43}