1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2011-2012 Freescale Semiconductor, Inc.
4  */
5 
6 /* #define DEBUG */
7 
8 #include <common.h>
9 #include <command.h>
10 #include <env_internal.h>
11 #include <asm/global_data.h>
12 #include <linux/stddef.h>
13 #include <u-boot/crc.h>
14 
15 #ifdef ENV_IS_EMBEDDED
16 static env_t *env_ptr = &environment;
17 #else /* ! ENV_IS_EMBEDDED */
18 static env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR;
19 #endif /* ENV_IS_EMBEDDED */
20 
21 DECLARE_GLOBAL_DATA_PTR;
22 
env_remote_init(void)23 static int env_remote_init(void)
24 {
25 	if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
26 		gd->env_addr = (ulong)&(env_ptr->data);
27 		gd->env_valid = ENV_VALID;
28 		return 0;
29 	}
30 
31 	return -ENOENT;
32 }
33 
34 #ifdef CONFIG_CMD_SAVEENV
env_remote_save(void)35 static int env_remote_save(void)
36 {
37 #ifdef CONFIG_SRIO_PCIE_BOOT_SLAVE
38 	printf("Can not support the 'saveenv' when boot from SRIO or PCIE!\n");
39 	return 1;
40 #else
41 	return 0;
42 #endif
43 }
44 #endif /* CONFIG_CMD_SAVEENV */
45 
env_remote_load(void)46 static int env_remote_load(void)
47 {
48 #ifndef ENV_IS_EMBEDDED
49 	return env_import((char *)env_ptr, 1, H_EXTERNAL);
50 #endif
51 
52 	return 0;
53 }
54 
55 U_BOOT_ENV_LOCATION(remote) = {
56 	.location	= ENVL_REMOTE,
57 	ENV_NAME("Remote")
58 	.load		= env_remote_load,
59 	.save		= env_save_ptr(env_remote_save),
60 	.init		= env_remote_init,
61 };
62