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 char *env_name_spec = "Remote";
  15
  16 #ifdef ENV_IS_EMBEDDED
  17 env_t *env_ptr = &environment;
  18 #else /* ! ENV_IS_EMBEDDED */
  19 env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR;
  20 #endif /* ENV_IS_EMBEDDED */
  21
  22 DECLARE_GLOBAL_DATA_PTR;
  23
  24 #if !defined(CONFIG_ENV_OFFSET)
  25 #define CONFIG_ENV_OFFSET 0
  26 #endif
  27
  28 static int env_remote_init(void)
  29 {
  30         if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
  31                 gd->env_addr = (ulong)&(env_ptr->data);
  32                 gd->env_valid = ENV_VALID;
  33                 return 0;
  34         }
  35
  36         return -ENOENT;
  37 }
  38
  39 #ifdef CONFIG_CMD_SAVEENV
  40 static int env_remote_save(void)
  41 {
  42 #ifdef CONFIG_SRIO_PCIE_BOOT_SLAVE
  43         printf("Can not support the 'saveenv' when boot from SRIO or PCIE!\n");
  44         return 1;
  45 #else
  46         return 0;
  47 #endif
  48 }
  49 #endif /* CONFIG_CMD_SAVEENV */
  50
  51 static void env_remote_load(void)
  52 {
  53 #ifndef ENV_IS_EMBEDDED
  54         env_import((char *)env_ptr, 1);
  55 #endif
  56 }
  57
  58 U_BOOT_ENV_LOCATION(remote) = {
  59         .location       = ENVL_REMOTE,
  60         .load           = env_remote_load,
  61         .save           = env_save_ptr(env_remote_save),
  62         .init           = env_remote_init,
  63 };