Merge tag 'signed-efi-next' of git://github.com/agraf/u-boot
[platform/kernel/u-boot.git] / env / remote.c
1 /*
2  * (C) Copyright 2011-2012 Freescale Semiconductor, Inc.
3  *
4  * SPDX-License-Identifier:     GPL-2.0+
5  */
6
7 /* #define DEBUG */
8
9 #include <common.h>
10 #include <command.h>
11 #include <environment.h>
12 #include <linux/stddef.h>
13
14 #ifdef ENV_IS_EMBEDDED
15 env_t *env_ptr = &environment;
16 #else /* ! ENV_IS_EMBEDDED */
17 env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR;
18 #endif /* ENV_IS_EMBEDDED */
19
20 DECLARE_GLOBAL_DATA_PTR;
21
22 #if !defined(CONFIG_ENV_OFFSET)
23 #define CONFIG_ENV_OFFSET 0
24 #endif
25
26 static int env_remote_init(void)
27 {
28         if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
29                 gd->env_addr = (ulong)&(env_ptr->data);
30                 gd->env_valid = ENV_VALID;
31                 return 0;
32         }
33
34         return -ENOENT;
35 }
36
37 #ifdef CONFIG_CMD_SAVEENV
38 static int env_remote_save(void)
39 {
40 #ifdef CONFIG_SRIO_PCIE_BOOT_SLAVE
41         printf("Can not support the 'saveenv' when boot from SRIO or PCIE!\n");
42         return 1;
43 #else
44         return 0;
45 #endif
46 }
47 #endif /* CONFIG_CMD_SAVEENV */
48
49 static int env_remote_load(void)
50 {
51 #ifndef ENV_IS_EMBEDDED
52         env_import((char *)env_ptr, 1);
53 #endif
54
55         return 0;
56 }
57
58 U_BOOT_ENV_LOCATION(remote) = {
59         .location       = ENVL_REMOTE,
60         ENV_NAME("Remote")
61         .load           = env_remote_load,
62         .save           = env_save_ptr(env_remote_save),
63         .init           = env_remote_init,
64 };