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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2000-2010
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Andreas Heppel <aheppel@sysgo.de>
*/
#include <command.h>
#include <env.h>
#include <env_internal.h>
#include <asm/global_data.h>
#include <linux/stddef.h>
#include <search.h>
#include <errno.h>
#include <u-boot/crc.h>
DECLARE_GLOBAL_DATA_PTR;
static env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR;
static int env_nvram_load(void)
{
char buf[CONFIG_ENV_SIZE];
memcpy(buf, (void *)CONFIG_ENV_ADDR, CONFIG_ENV_SIZE);
return env_import(buf, 1, H_EXTERNAL);
}
static int env_nvram_save(void)
{
env_t env_new;
int rcode = 0;
rcode = env_export(&env_new);
if (rcode)
return rcode;
if (memcpy((char *)CONFIG_ENV_ADDR, &env_new, CONFIG_ENV_SIZE) == NULL)
rcode = 1;
return rcode;
}
/*
* Initialize Environment use
*
* We are still running from ROM, so data use is limited
*/
static int env_nvram_init(void)
{
if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
gd->env_addr = (ulong)&env_ptr->data;
gd->env_valid = ENV_VALID;
} else {
gd->env_valid = ENV_INVALID;
}
return 0;
}
U_BOOT_ENV_LOCATION(nvram) = {
.location = ENVL_NVRAM,
ENV_NAME("NVRAM")
.load = env_nvram_load,
.save = env_save_ptr(env_nvram_save),
.init = env_nvram_init,
};
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