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 <asm/global_data.h>
  12 #include <linux/stddef.h>
  13 #include <u-boot/crc.h>
  14
  15 #ifdef ENV_IS_EMBEDDED
  16 static env_t *env_ptr = &environment;
  17 #else /* ! ENV_IS_EMBEDDED */
  18 static env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR;
  19 #endif /* ENV_IS_EMBEDDED */
  20
  21 DECLARE_GLOBAL_DATA_PTR;
  22
  23 static 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
  35 static 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
  46 static 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
  55 U_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 };