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"Das U-Boot" Source Tree
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * (C) Copyright 2011-2012 Freescale Semiconductor, Inc.
4 */
5
6/* #define DEBUG */
7
8#include <command.h>
9#include <env_internal.h>
10#include <asm/global_data.h>
11#include <linux/errno.h>
12#include <linux/stddef.h>
13#include <u-boot/crc.h>
14
15#ifdef ENV_IS_EMBEDDED
16static env_t *env_ptr = &environment;
17#else /* ! ENV_IS_EMBEDDED */
18static env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR;
19#endif /* ENV_IS_EMBEDDED */
20
21DECLARE_GLOBAL_DATA_PTR;
22
23static 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
35static 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
46static 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
55U_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};