env/remote.c

   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 <linux/stddef.h>
  12
  13 #ifdef ENV_IS_EMBEDDED
  14 env_t *env_ptr = &environment;
  15 #else /* ! ENV_IS_EMBEDDED */
  16 env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR;
  17 #endif /* ENV_IS_EMBEDDED */
  18
  19 DECLARE_GLOBAL_DATA_PTR;
  20
  21 static int env_remote_init(void)
  22 {
  23         if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
  24                 gd->env_addr = (ulong)&(env_ptr->data);
  25                 gd->env_valid = ENV_VALID;
  26                 return 0;
  27         }
  28
  29         return -ENOENT;
  30 }
  31
  32 #ifdef CONFIG_CMD_SAVEENV
  33 static int env_remote_save(void)
  34 {
  35 #ifdef CONFIG_SRIO_PCIE_BOOT_SLAVE
  36         printf("Can not support the 'saveenv' when boot from SRIO or PCIE!\n");
  37         return 1;
  38 #else
  39         return 0;
  40 #endif
  41 }
  42 #endif /* CONFIG_CMD_SAVEENV */
  43
  44 static int env_remote_load(void)
  45 {
  46 #ifndef ENV_IS_EMBEDDED
  47         return env_import((char *)env_ptr, 1);
  48 #endif
  49
  50         return 0;
  51 }
  52
  53 U_BOOT_ENV_LOCATION(remote) = {
  54         .location       = ENVL_REMOTE,
  55         ENV_NAME("Remote")
  56         .load           = env_remote_load,
  57         .save           = env_save_ptr(env_remote_save),
  58         .init           = env_remote_init,
  59 };