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https://github.com/brain-hackers/u-boot-brain
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fd1000b9c1
This is an enhancement that permits storing the environment file on an EXT4 partition such as the root filesystem. It is based on the existing FAT environment file code.
128 lines
2.6 KiB
C
128 lines
2.6 KiB
C
/*
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* (c) Copyright 2016 by VRT Technology
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*
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* Author:
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* Stuart Longland <stuartl@vrt.com.au>
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*
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* Based on FAT environment driver
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* (c) Copyright 2011 by Tigris Elektronik GmbH
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*
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* Author:
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* Maximilian Schwerin <mvs@tigris.de>
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*
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* and EXT4 filesystem implementation
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* (C) Copyright 2011 - 2012 Samsung Electronics
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* EXT4 filesystem implementation in Uboot by
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* Uma Shankar <uma.shankar@samsung.com>
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* Manjunatha C Achar <a.manjunatha@samsung.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <command.h>
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#include <environment.h>
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#include <linux/stddef.h>
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#include <malloc.h>
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#include <search.h>
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#include <errno.h>
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#include <ext4fs.h>
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#include <mmc.h>
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char *env_name_spec = "EXT4";
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env_t *env_ptr;
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DECLARE_GLOBAL_DATA_PTR;
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int env_init(void)
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{
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/* use default */
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gd->env_addr = (ulong)&default_environment[0];
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gd->env_valid = 1;
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return 0;
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}
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#ifdef CONFIG_CMD_SAVEENV
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int saveenv(void)
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{
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env_t env_new;
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block_dev_desc_t *dev_desc = NULL;
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disk_partition_t info;
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int dev, part;
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int err;
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err = env_export(&env_new);
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if (err)
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return err;
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part = get_device_and_partition(EXT4_ENV_INTERFACE,
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EXT4_ENV_DEVICE_AND_PART,
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&dev_desc, &info, 1);
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if (part < 0)
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return 1;
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dev = dev_desc->dev;
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ext4fs_set_blk_dev(dev_desc, &info);
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if (!ext4fs_mount(info.size)) {
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printf("\n** Unable to use %s %s for saveenv **\n",
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EXT4_ENV_INTERFACE, EXT4_ENV_DEVICE_AND_PART);
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return 1;
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}
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err = ext4fs_write(EXT4_ENV_FILE, (void *)&env_new, sizeof(env_t));
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ext4fs_close();
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if (err == -1) {
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printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
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EXT4_ENV_FILE, EXT4_ENV_INTERFACE, dev, part);
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return 1;
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}
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puts("done\n");
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return 0;
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}
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#endif /* CONFIG_CMD_SAVEENV */
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void env_relocate_spec(void)
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{
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ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
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block_dev_desc_t *dev_desc = NULL;
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disk_partition_t info;
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int dev, part;
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int err;
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part = get_device_and_partition(EXT4_ENV_INTERFACE,
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EXT4_ENV_DEVICE_AND_PART,
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&dev_desc, &info, 1);
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if (part < 0)
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goto err_env_relocate;
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dev = dev_desc->dev;
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ext4fs_set_blk_dev(dev_desc, &info);
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if (!ext4fs_mount(info.size)) {
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printf("\n** Unable to use %s %s for loading the env **\n",
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EXT4_ENV_INTERFACE, EXT4_ENV_DEVICE_AND_PART);
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goto err_env_relocate;
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}
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err = ext4_read_file(EXT4_ENV_FILE, buf, 0, CONFIG_ENV_SIZE);
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ext4fs_close();
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if (err == -1) {
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printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
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EXT4_ENV_FILE, EXT4_ENV_INTERFACE, dev, part);
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goto err_env_relocate;
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}
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env_import(buf, 1);
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return;
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err_env_relocate:
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set_default_env(NULL);
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}
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