1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * OF console routines
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) Paul Mackerras 1997.
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun #include <stddef.h>
8*4882a593Smuzhiyun #include "types.h"
9*4882a593Smuzhiyun #include "elf.h"
10*4882a593Smuzhiyun #include "string.h"
11*4882a593Smuzhiyun #include "stdio.h"
12*4882a593Smuzhiyun #include "page.h"
13*4882a593Smuzhiyun #include "ops.h"
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun #include "of.h"
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun static unsigned int of_stdout_handle;
18*4882a593Smuzhiyun
of_console_open(void)19*4882a593Smuzhiyun static int of_console_open(void)
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun void *devp;
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun if (((devp = of_finddevice("/chosen")) != NULL)
24*4882a593Smuzhiyun && (of_getprop(devp, "stdout", &of_stdout_handle,
25*4882a593Smuzhiyun sizeof(of_stdout_handle))
26*4882a593Smuzhiyun == sizeof(of_stdout_handle))) {
27*4882a593Smuzhiyun of_stdout_handle = be32_to_cpu(of_stdout_handle);
28*4882a593Smuzhiyun return 0;
29*4882a593Smuzhiyun }
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun return -1;
32*4882a593Smuzhiyun }
33*4882a593Smuzhiyun
of_console_write(const char * buf,int len)34*4882a593Smuzhiyun static void of_console_write(const char *buf, int len)
35*4882a593Smuzhiyun {
36*4882a593Smuzhiyun of_call_prom("write", 3, 1, of_stdout_handle, buf, len);
37*4882a593Smuzhiyun }
38*4882a593Smuzhiyun
of_console_init(void)39*4882a593Smuzhiyun void of_console_init(void)
40*4882a593Smuzhiyun {
41*4882a593Smuzhiyun console_ops.open = of_console_open;
42*4882a593Smuzhiyun console_ops.write = of_console_write;
43*4882a593Smuzhiyun }
44