]>
git.ipfire.org Git - people/ms/u-boot.git/blob - common/env_dataflash.c
2 * LowLevel function for DataFlash environment support
3 * Author : Gilles Gastaldi (Atmel)
5 * SPDX-License-Identifier: GPL-2.0+
9 #include <environment.h>
10 #include <linux/stddef.h>
11 #include <dataflash.h>
15 DECLARE_GLOBAL_DATA_PTR
;
19 char *env_name_spec
= "dataflash";
21 uchar
env_get_char_spec(int index
)
25 read_dataflash(CONFIG_ENV_ADDR
+ index
+ offsetof(env_t
, data
),
30 void env_relocate_spec(void)
34 char buf
[CONFIG_ENV_SIZE
];
37 read_dataflash(CONFIG_ENV_ADDR
+ offsetof(env_t
, crc
),
38 sizeof(ulong
), (char *)&crc
);
40 /* Read whole environment */
41 read_dataflash(CONFIG_ENV_ADDR
, CONFIG_ENV_SIZE
, buf
);
43 /* Calculate the CRC */
44 off
= offsetof(env_t
, data
);
45 new = crc32(new, (unsigned char *)(buf
+ off
), ENV_SIZE
);
50 set_default_env("!bad CRC");
53 #ifdef CONFIG_ENV_OFFSET_REDUND
54 #error No support for redundant environment on dataflash yet!
62 ret
= env_export(&env_new
);
66 return write_dataflash(CONFIG_ENV_ADDR
,
67 (unsigned long)&env_new
,
72 * Initialize environment use
74 * We are still running from ROM, so data use is limited.
75 * Use a (moderately small) buffer on the stack
80 gd
->env_addr
= (ulong
)&default_environment
[0];