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