2 * (C) Copyright 2000-2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
6 * Andreas Heppel <aheppel@sysgo.de>
8 * See file CREDITS for list of people who contributed to this
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
29 #include <environment.h>
30 #include <linux/stddef.h>
32 DECLARE_GLOBAL_DATA_PTR
;
34 env_t
*env_ptr
= NULL
;
36 char * env_name_spec
= "EEPROM";
38 uchar
env_get_char_spec (int index
)
42 eeprom_read (CONFIG_SYS_DEF_EEPROM_ADDR
,
43 CONFIG_ENV_OFFSET
+index
+offsetof(env_t
,data
),
49 void env_relocate_spec (void)
51 eeprom_read (CONFIG_SYS_DEF_EEPROM_ADDR
,
59 return eeprom_write (CONFIG_SYS_DEF_EEPROM_ADDR
,
65 /************************************************************************
66 * Initialize Environment use
68 * We are still running from ROM, so data use is limited
69 * Use a (moderately small) buffer on the stack
77 eeprom_init (); /* prepare for EEPROM read/write */
80 eeprom_read (CONFIG_SYS_DEF_EEPROM_ADDR
,
81 CONFIG_ENV_OFFSET
+offsetof(env_t
,crc
),
82 (uchar
*)&crc
, sizeof(ulong
));
86 off
= offsetof(env_t
,data
);
88 int n
= (len
> sizeof(buf
)) ? sizeof(buf
) : len
;
90 eeprom_read (CONFIG_SYS_DEF_EEPROM_ADDR
, CONFIG_ENV_OFFSET
+off
, buf
, n
);
91 new = crc32 (new, buf
, n
);
97 gd
->env_addr
= offsetof(env_t
,data
);