mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 11:47:02 +07:00
0846471252
Commit 2e60161337 split up
arch/powerpc/boot/of.c so that some OF functions can be used on
platforms that don't want to use the overall OF platform boot code.
This is useful on things like PReP which can have an OF implementation
which is useful for debugging output, but inadequate for booting.
However, that commit didn't export quite enough things to make a
usable OF console on a non-OF system. In particular, the device tree
manipulation performed to initialize the OF console code must
explicitly use the OF device tree, rather than the flattened device
tree, even if the system is otherwise booting using a flattened device
tree. This makes it so.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
46 lines
976 B
C
46 lines
976 B
C
/*
|
|
* OF console routines
|
|
*
|
|
* Copyright (C) Paul Mackerras 1997.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
#include <stddef.h>
|
|
#include "types.h"
|
|
#include "elf.h"
|
|
#include "string.h"
|
|
#include "stdio.h"
|
|
#include "page.h"
|
|
#include "ops.h"
|
|
|
|
#include "of.h"
|
|
|
|
static void *of_stdout_handle;
|
|
|
|
static int of_console_open(void)
|
|
{
|
|
void *devp;
|
|
|
|
if (((devp = of_finddevice("/chosen")) != NULL)
|
|
&& (of_getprop(devp, "stdout", &of_stdout_handle,
|
|
sizeof(of_stdout_handle))
|
|
== sizeof(of_stdout_handle)))
|
|
return 0;
|
|
|
|
return -1;
|
|
}
|
|
|
|
static void of_console_write(const char *buf, int len)
|
|
{
|
|
of_call_prom("write", 3, 1, of_stdout_handle, buf, len);
|
|
}
|
|
|
|
void of_console_init(void)
|
|
{
|
|
console_ops.open = of_console_open;
|
|
console_ops.write = of_console_write;
|
|
}
|