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 };