LXR uboot/common/env

   1/*
   2 * (C) Copyright 2010-2016 Freescale Semiconductor, Inc.
   3 *
   4 * SPDX-License-Identifier:     GPL-2.0+
   5 */
   6
   7/* #define DEBUG */
   8
   9#include <common.h>
  10
  11#include <command.h>
  12#include <environment.h>
  13#include <linux/stddef.h>
  14#include <errno.h>
  15#include <memalign.h>
  16#include <sata.h>
  17#include <search.h>
  18
  19#if defined(CONFIG_ENV_SIZE_REDUND) || defined(CONFIG_ENV_OFFSET_REDUND)
  20#error ENV REDUND not supported
  21#endif
  22
  23#if !defined(CONFIG_ENV_OFFSET) || !defined(CONFIG_ENV_SIZE)
  24#error CONFIG_ENV_OFFSET or CONFIG_ENV_SIZE not defined
  25#endif
  26
  27char *env_name_spec = "SATA";
  28
  29DECLARE_GLOBAL_DATA_PTR;
  30
  31__weak int sata_get_env_dev(void)
  32{
  33        return CONFIG_SYS_SATA_ENV_DEV;
  34}
  35
  36int env_init(void)
  37{
  38        /* use default */
  39        gd->env_addr = (ulong)&default_environment[0];
  40        gd->env_valid = 1;
  41
  42        return 0;
  43}
  44
  45#ifdef CONFIG_CMD_SAVEENV
  46static inline int write_env(struct blk_desc *sata, unsigned long size,
  47                            unsigned long offset, void *buffer)
  48{
  49        uint blk_start, blk_cnt, n;
  50
  51        blk_start = ALIGN(offset, sata->blksz) / sata->blksz;
  52        blk_cnt   = ALIGN(size, sata->blksz) / sata->blksz;
  53
  54        n = blk_dwrite(sata, blk_start, blk_cnt, buffer);
  55
  56        return (n == blk_cnt) ? 0 : -1;
  57}
  58
  59int saveenv(void)
  60{
  61        ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
  62        struct blk_desc *sata = NULL;
  63        int env_sata, ret;
  64
  65        if (sata_initialize())
  66                return 1;
  67
  68        env_sata = sata_get_env_dev();
  69
  70        sata = sata_get_dev(env_sata);
  71        if (sata == NULL) {
  72                printf("Unknown SATA(%d) device for environment!\n",
  73                       env_sata);
  74                return 1;
  75        }
  76
  77        ret = env_export(env_new);
  78        if (ret)
  79                return 1;
  80
  81        printf("Writing to SATA(%d)...", env_sata);
  82        if (write_env(sata, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, &env_new)) {
  83                puts("failed\n");
  84                return 1;
  85        }
  86
  87        puts("done\n");
  88        return 0;
  89}
  90#endif /* CONFIG_CMD_SAVEENV */
  91
  92static inline int read_env(struct blk_desc *sata, unsigned long size,
  93                           unsigned long offset, void *buffer)
  94{
  95        uint blk_start, blk_cnt, n;
  96
  97        blk_start = ALIGN(offset, sata->blksz) / sata->blksz;
  98        blk_cnt   = ALIGN(size, sata->blksz) / sata->blksz;
  99
 100        n = blk_dread(sata, blk_start, blk_cnt, buffer);
 101
 102        return (n == blk_cnt) ? 0 : -1;
 103}
 104
 105void env_relocate_spec(void)
 106{
 107        ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
 108        struct blk_desc *sata = NULL;
 109        int env_sata;
 110
 111        if (sata_initialize())
 112                return;
 113
 114        env_sata = sata_get_env_dev();
 115
 116        sata = sata_get_dev(env_sata);
 117        if (sata == NULL) {
 118                printf("Unknown SATA(%d) device for environment!\n",
 119                       env_sata);
 120                return;
 121        }
 122
 123        if (read_env(sata, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, buf))
 124                return set_default_env(NULL);
 125
 126        env_import(buf, 1);
 127}
 128