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/*
* (C) Copyright 2009 mGine co.
* unsik Kim <donari75@gmail.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <command.h>
#include <environment.h>
#include <linux/stddef.h>
#include <mg_disk.h>
/* references to names in env_common.c */
extern uchar default_environment[];
extern int default_environment_size;
char * env_name_spec = "MG_DISK";
env_t *env_ptr = 0;
DECLARE_GLOBAL_DATA_PTR;
uchar env_get_char_spec(int index)
{
return (*((uchar *) (gd->env_addr + index)));
}
void env_relocate_spec(void)
{
unsigned int err;
err = mg_disk_init();
if (err) {
puts ("*** Warning - mg_disk_init error");
goto OUT;
}
err = mg_disk_read(CONFIG_ENV_ADDR, (u_char *)env_ptr, CONFIG_ENV_SIZE);
if (err) {
puts ("*** Warning - mg_disk_read error");
goto OUT;
}
if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc) {
puts ("*** Warning - CRC error");
goto OUT;
}
return;
OUT:
printf (", using default environment\n\n");
set_default_env();
}
int saveenv(void)
{
unsigned int err;
env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE);
err = mg_disk_write(CONFIG_ENV_ADDR, (u_char *)env_ptr,
CONFIG_ENV_SIZE);
if (err)
puts ("*** Warning - mg_disk_write error\n\n");
return err;
}
int env_init(void)
{
/* use default */
gd->env_addr = (ulong) & default_environment[0];
gd->env_valid = 1;
return 0;
}
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