1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * (C) Copyright 2000-2010
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 *
6 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
7 * Andreas Heppel <aheppel@sysgo.de>
8 */
9
10#include <common.h>
11#include <command.h>
12#include <env.h>
13#include <env_internal.h>
14#include <asm/global_data.h>
15#include <linux/stddef.h>
16
17DECLARE_GLOBAL_DATA_PTR;
18
19/*
20 * Because we only ever have the default environment available we must mark
21 * it as invalid.
22 */
23static int env_nowhere_init(void)
24{
25	gd->env_valid = ENV_INVALID;
26
27	return 0;
28}
29
30static int env_nowhere_load(void)
31{
32	/*
33	 * For SPL, setting env_valid = ENV_INVALID is enough, as env_get()
34	 * searches default_environment array in that case.
35	 * For U-Boot proper, import the default environment to allow reload.
36	 */
37	if (!IS_ENABLED(CONFIG_SPL_BUILD))
38		env_set_default(NULL, 0);
39
40	gd->env_valid = ENV_INVALID;
41
42	return 0;
43}
44
45U_BOOT_ENV_LOCATION(nowhere) = {
46	.location	= ENVL_NOWHERE,
47	.init		= env_nowhere_init,
48	.load		= env_nowhere_load,
49	ENV_NAME("nowhere")
50};
51