avr32: use dlmalloc for DMA buffers
[oweals/u-boot.git] / common / env_fat.c
1 /*
2  * (c) Copyright 2011 by Tigris Elektronik GmbH
3  *
4  * Author:
5  *  Maximilian Schwerin <mvs@tigris.de>
6  *
7  * SPDX-License-Identifier:     GPL-2.0+
8  */
9
10 #include <common.h>
11
12 #include <command.h>
13 #include <environment.h>
14 #include <linux/stddef.h>
15 #include <malloc.h>
16 #include <search.h>
17 #include <errno.h>
18 #include <fat.h>
19 #include <mmc.h>
20
21 char *env_name_spec = "FAT";
22
23 env_t *env_ptr;
24
25 DECLARE_GLOBAL_DATA_PTR;
26
27 int env_init(void)
28 {
29         /* use default */
30         gd->env_addr = (ulong)&default_environment[0];
31         gd->env_valid = 1;
32
33         return 0;
34 }
35
36 #ifdef CONFIG_CMD_SAVEENV
37 int saveenv(void)
38 {
39         env_t   env_new;
40         block_dev_desc_t *dev_desc = NULL;
41         disk_partition_t info;
42         int dev, part;
43         int err;
44         loff_t size;
45
46         err = env_export(&env_new);
47         if (err)
48                 return err;
49
50         part = get_device_and_partition(FAT_ENV_INTERFACE,
51                                         FAT_ENV_DEVICE_AND_PART,
52                                         &dev_desc, &info, 1);
53         if (part < 0)
54                 return 1;
55
56         dev = dev_desc->dev;
57         if (fat_set_blk_dev(dev_desc, &info) != 0) {
58                 printf("\n** Unable to use %s %d:%d for saveenv **\n",
59                        FAT_ENV_INTERFACE, dev, part);
60                 return 1;
61         }
62
63         err = file_fat_write(FAT_ENV_FILE, (void *)&env_new, 0, sizeof(env_t),
64                              &size);
65         if (err == -1) {
66                 printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
67                         FAT_ENV_FILE, FAT_ENV_INTERFACE, dev, part);
68                 return 1;
69         }
70
71         puts("done\n");
72         return 0;
73 }
74 #endif /* CONFIG_CMD_SAVEENV */
75
76 void env_relocate_spec(void)
77 {
78         ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
79         block_dev_desc_t *dev_desc = NULL;
80         disk_partition_t info;
81         int dev, part;
82         int err;
83
84         part = get_device_and_partition(FAT_ENV_INTERFACE,
85                                         FAT_ENV_DEVICE_AND_PART,
86                                         &dev_desc, &info, 1);
87         if (part < 0)
88                 goto err_env_relocate;
89
90         dev = dev_desc->dev;
91         if (fat_set_blk_dev(dev_desc, &info) != 0) {
92                 printf("\n** Unable to use %s %d:%d for loading the env **\n",
93                        FAT_ENV_INTERFACE, dev, part);
94                 goto err_env_relocate;
95         }
96
97         err = file_fat_read(FAT_ENV_FILE, buf, CONFIG_ENV_SIZE);
98         if (err == -1) {
99                 printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
100                         FAT_ENV_FILE, FAT_ENV_INTERFACE, dev, part);
101                 goto err_env_relocate;
102         }
103
104         env_import(buf, 1);
105         return;
106
107 err_env_relocate:
108         set_default_env(NULL);
109 }