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