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"Das U-Boot" Source Tree
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 <command.h>
11#include <env.h>
12#include <env_internal.h>
13#include <asm/global_data.h>
14#include <linux/stddef.h>
15
16DECLARE_GLOBAL_DATA_PTR;
17
18/*
19 * Because we only ever have the default environment available we must mark
20 * it as invalid.
21 */
22static int env_nowhere_init(void)
23{
24 gd->env_valid = ENV_INVALID;
25
26 return 0;
27}
28
29static int env_nowhere_load(void)
30{
31 /*
32 * For SPL, setting env_valid = ENV_INVALID is enough, as env_get()
33 * searches default_environment array in that case.
34 * For U-Boot proper, import the default environment to allow reload.
35 */
36 if (!IS_ENABLED(CONFIG_XPL_BUILD))
37 env_set_default(NULL, 0);
38
39 gd->env_valid = ENV_INVALID;
40
41 return 0;
42}
43
44U_BOOT_ENV_LOCATION(nowhere) = {
45 .location = ENVL_NOWHERE,
46 .init = env_nowhere_init,
47 .load = env_nowhere_load,
48 ENV_NAME("nowhere")
49};