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 
17 DECLARE_GLOBAL_DATA_PTR;
18 
19 /*
20  * Because we only ever have the default environment available we must mark
21  * it as invalid.
22  */
env_nowhere_init(void)23 static int env_nowhere_init(void)
24 {
25 	gd->env_addr	= (ulong)&default_environment[0];
26 	gd->env_valid	= ENV_INVALID;
27 
28 	return 0;
29 }
30 
env_nowhere_load(void)31 static int env_nowhere_load(void)
32 {
33 	/*
34 	 * for SPL, set env_valid = ENV_INVALID is enough as env_get_char()
35 	 * return the default env if env_get is used
36 	 * and SPL don't used env_import to reduce its size
37 	 * For U-Boot proper, import the default environment to allow reload.
38 	 */
39 	if (!IS_ENABLED(CONFIG_SPL_BUILD))
40 		env_set_default(NULL, 0);
41 
42 	gd->env_valid	= ENV_INVALID;
43 
44 	return 0;
45 }
46 
47 U_BOOT_ENV_LOCATION(nowhere) = {
48 	.location	= ENVL_NOWHERE,
49 	.init		= env_nowhere_init,
50 	.load		= env_nowhere_load,
51 	ENV_NAME("nowhere")
52 };
53