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,
28 * 09-18-2001 Andreas Heppel, Sysgo RTS GmbH <aheppel@sysgo.de>
30 * It might not be possible in all cases to use 'memcpy()' to copy
31 * the environment to NVRAM, as the NVRAM might not be mapped into
32 * the memory space. (I.e. this is the case for the BAB750). In those
33 * cases it might be possible to access the NVRAM using a different
34 * method. For example, the RTC on the BAB750 is accessible in IO
35 * space using its address and data registers. To enable usage of
36 * NVRAM in those cases I invented the functions 'nvram_read()' and
37 * 'nvram_write()', which will be activated upon the configuration
38 * #define CFG_NVRAM_ACCESS_ROUTINE. Note, that those functions are
39 * strongly dependent on the used HW, and must be redefined for each
40 * board that wants to use them.
45 #ifdef CFG_ENV_IS_IN_NVRAM /* Environment is in NVRAM */
48 #include <environment.h>
49 #include <cmd_nvedit.h>
50 #include <linux/stddef.h>
53 #ifdef CFG_NVRAM_ACCESS_ROUTINE
54 extern void *nvram_read(void *dest, const long src, size_t count);
55 extern void nvram_write(long dest, const void *src, size_t count);
56 env_t *env_ptr = NULL;
58 env_t *env_ptr = (env_t *)CFG_ENV_ADDR;
61 char * env_name_spec = "NVRAM";
63 extern uchar default_environment[];
64 extern int default_environment_size;
66 extern uchar (*env_get_char)(int);
67 extern uchar env_get_char_memory (int index);
69 #ifdef CONFIG_AMIGAONEG3SE
70 uchar env_get_char_spec (int index)
72 #ifdef CFG_NVRAM_ACCESS_ROUTINE
75 nvram_read(&c, CFG_ENV_ADDR+index, 1);
79 DECLARE_GLOBAL_DATA_PTR;
82 retval = *((uchar *)(gd->env_addr + index));
88 uchar env_get_char_spec (int index)
90 #ifdef CFG_NVRAM_ACCESS_ROUTINE
93 nvram_read(&c, CFG_ENV_ADDR+index, 1);
97 DECLARE_GLOBAL_DATA_PTR;
99 return *((uchar *)(gd->env_addr + index));
104 void env_relocate_spec (void)
106 #if defined(CFG_NVRAM_ACCESS_ROUTINE)
107 nvram_read(env_ptr, CFG_ENV_ADDR, CFG_ENV_SIZE);
109 memcpy (env_ptr, (void*)CFG_ENV_ADDR, CFG_ENV_SIZE);
116 #ifdef CONFIG_AMIGAONEG3SE
119 #ifdef CFG_NVRAM_ACCESS_ROUTINE
120 nvram_write(CFG_ENV_ADDR, env_ptr, CFG_ENV_SIZE);
122 if (memcpy ((char *)CFG_ENV_ADDR, env_ptr, CFG_ENV_SIZE) == NULL)
125 #ifdef CONFIG_AMIGAONEG3SE
133 /************************************************************************
134 * Initialize Environment use
136 * We are still running from ROM, so data use is limited
140 DECLARE_GLOBAL_DATA_PTR;
141 #ifdef CONFIG_AMIGAONEG3SE
144 #if defined(CFG_NVRAM_ACCESS_ROUTINE)
146 uchar data[ENV_SIZE];
147 nvram_read (&crc, CFG_ENV_ADDR, sizeof(ulong));
148 nvram_read (data, CFG_ENV_ADDR+sizeof(ulong), ENV_SIZE);
150 if (crc32(0, data, ENV_SIZE) == crc) {
151 gd->env_addr = (ulong)CFG_ENV_ADDR + sizeof(long);
153 if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
154 gd->env_addr = (ulong)&(env_ptr->data);
158 gd->env_addr = (ulong)&default_environment[0];
161 #ifdef CONFIG_AMIGAONEG3SE
167 #endif /* CFG_ENV_IS_IN_NVRAM */