common/env_common.c

   1 /*
   2  * (C) Copyright 2000-2002
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   6  * Andreas Heppel <aheppel@sysgo.de>
   7
   8  * See file CREDITS for list of people who contributed to this
   9  * project.
  10  *
  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.
  15  *
  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.
  20  *
  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,
  24  * MA 02111-1307 USA
  25  */
  26
  27 #include <common.h>
  28 #include <command.h>
  29 #include <environment.h>
  30 #include <cmd_nvedit.h>
  31 #include <linux/stddef.h>
  32 #include <malloc.h>
  33
  34 #ifdef CONFIG_SHOW_BOOT_PROGRESS
  35 # include <status_led.h>
  36 # define SHOW_BOOT_PROGRESS(arg)        show_boot_progress(arg)
  37 #else
  38 # define SHOW_BOOT_PROGRESS(arg)
  39 #endif
  40
  41 #ifdef CONFIG_AMIGAONEG3SE
  42         extern void enable_nvram(void);
  43         extern void disable_nvram(void);
  44 #endif
  45
  46 #undef DEBUG_ENV
  47 #ifdef DEBUG_ENV
  48 #define DEBUGF(fmt,args...) printf(fmt ,##args)
  49 #else
  50 #define DEBUGF(fmt,args...)
  51 #endif
  52
  53 extern env_t *env_ptr;
  54
  55 extern void env_relocate_spec (void);
  56 extern uchar env_get_char_spec(int);
  57
  58 static uchar env_get_char_init (int index);
  59 uchar (*env_get_char)(int) = env_get_char_init;
  60
  61 /************************************************************************
  62  * Default settings to be used when no valid environment is found
  63  */
  64 #define XMK_STR(x)      #x
  65 #define MK_STR(x)       XMK_STR(x)
  66
  67 uchar default_environment[] = {
  68 #ifdef  CONFIG_BOOTARGS
  69         "bootargs="     CONFIG_BOOTARGS                 "\0"
  70 #endif
  71 #ifdef  CONFIG_BOOTCOMMAND
  72         "bootcmd="      CONFIG_BOOTCOMMAND              "\0"
  73 #endif
  74 #ifdef  CONFIG_RAMBOOTCOMMAND
  75         "ramboot="      CONFIG_RAMBOOTCOMMAND           "\0"
  76 #endif
  77 #ifdef  CONFIG_NFSBOOTCOMMAND
  78         "nfsboot="      CONFIG_NFSBOOTCOMMAND           "\0"
  79 #endif
  80 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
  81         "bootdelay="    MK_STR(CONFIG_BOOTDELAY)        "\0"
  82 #endif
  83 #if defined(CONFIG_BAUDRATE) && (CONFIG_BAUDRATE >= 0)
  84         "baudrate="     MK_STR(CONFIG_BAUDRATE)         "\0"
  85 #endif
  86 #ifdef  CONFIG_LOADS_ECHO
  87         "loads_echo="   MK_STR(CONFIG_LOADS_ECHO)       "\0"
  88 #endif
  89 #ifdef  CONFIG_ETHADDR
  90         "ethaddr="      MK_STR(CONFIG_ETHADDR)          "\0"
  91 #endif
  92 #ifdef  CONFIG_ETH1ADDR
  93         "eth1addr="     MK_STR(CONFIG_ETH1ADDR)         "\0"
  94 #endif
  95 #ifdef  CONFIG_ETH2ADDR
  96         "eth2addr="     MK_STR(CONFIG_ETH2ADDR)         "\0"
  97 #endif
  98 #ifdef  CONFIG_IPADDR
  99         "ipaddr="       MK_STR(CONFIG_IPADDR)           "\0"
 100 #endif
 101 #ifdef  CONFIG_SERVERIP
 102         "serverip="     MK_STR(CONFIG_SERVERIP)         "\0"
 103 #endif
 104 #ifdef  CFG_AUTOLOAD
 105         "autoload="     CFG_AUTOLOAD                    "\0"
 106 #endif
 107 #ifdef  CONFIG_PREBOOT
 108         "preboot="      CONFIG_PREBOOT                  "\0"
 109 #endif
 110 #ifdef  CONFIG_ROOTPATH
 111         "rootpath="     MK_STR(CONFIG_ROOTPATH)         "\0"
 112 #endif
 113 #ifdef  CONFIG_GATEWAYIP
 114         "gatewayip="    MK_STR(CONFIG_GATEWAYIP)        "\0"
 115 #endif
 116 #ifdef  CONFIG_NETMASK
 117         "netmask="      MK_STR(CONFIG_NETMASK)          "\0"
 118 #endif
 119 #ifdef  CONFIG_HOSTNAME
 120         "hostname="     MK_STR(CONFIG_HOSTNAME)         "\0"
 121 #endif
 122 #ifdef  CONFIG_BOOTFILE
 123         "bootfile="     MK_STR(CONFIG_BOOTFILE)         "\0"
 124 #endif
 125 #ifdef  CONFIG_LOADADDR
 126         "loadaddr="     MK_STR(CONFIG_LOADADDR)         "\0"
 127 #endif
 128 #ifdef  CONFIG_CLOCKS_IN_MHZ
 129         "clocks_in_mhz=1\0"
 130 #endif
 131 #if defined(CONFIG_PCI_BOOTDELAY) && (CONFIG_PCI_BOOTDELAY > 0)
 132         "pcidelay="     MK_STR(CONFIG_PCI_BOOTDELAY)    "\0"
 133 #endif
 134 #ifdef  CONFIG_EXTRA_ENV_SETTINGS
 135         CONFIG_EXTRA_ENV_SETTINGS
 136 #endif
 137         "\0"
 138 };
 139
 140
 141 void env_crc_update (void)
 142 {
 143         env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE);
 144 }
 145
 146 static uchar env_get_char_init (int index)
 147 {
 148         DECLARE_GLOBAL_DATA_PTR;
 149         uchar c;
 150
 151         /* if crc was bad, use the default environment */
 152         if (gd->env_valid)
 153         {
 154                 c = env_get_char_spec(index);
 155         } else {
 156                 c = default_environment[index];
 157         }
 158
 159         return (c);
 160 }
 161
 162 #ifdef CONFIG_AMIGAONEG3SE
 163 uchar env_get_char_memory (int index)
 164 {
 165         DECLARE_GLOBAL_DATA_PTR;
 166         uchar retval;
 167         enable_nvram();
 168         if (gd->env_valid) {
 169                 retval = ( *((uchar *)(gd->env_addr + index)) );
 170         } else {
 171                 retval = ( default_environment[index] );
 172         }
 173         disable_nvram();
 174         return retval;
 175 }
 176 #else
 177 uchar env_get_char_memory (int index)
 178 {
 179         DECLARE_GLOBAL_DATA_PTR;
 180
 181         if (gd->env_valid) {
 182                 return ( *((uchar *)(gd->env_addr + index)) );
 183         } else {
 184                 return ( default_environment[index] );
 185         }
 186 }
 187 #endif
 188
 189 uchar *env_get_addr (int index)
 190 {
 191         DECLARE_GLOBAL_DATA_PTR;
 192
 193         if (gd->env_valid) {
 194                 return ( ((uchar *)(gd->env_addr + index)) );
 195         } else {
 196                 return (&default_environment[index]);
 197         }
 198 }
 199
 200 void env_relocate (void)
 201 {
 202         DECLARE_GLOBAL_DATA_PTR;
 203
 204         DEBUGF ("%s[%d] offset = 0x%lx\n", __FUNCTION__,__LINE__,
 205                 gd->reloc_off);
 206
 207 #ifdef CONFIG_AMIGAONEG3SE
 208         enable_nvram();
 209 #endif
 210
 211 #ifdef ENV_IS_EMBEDDED
 212         /*
 213          * The environment buffer is embedded with the text segment,
 214          * just relocate the environment pointer
 215          */
 216         env_ptr = (env_t *)((ulong)env_ptr + gd->reloc_off);
 217         DEBUGF ("%s[%d] embedded ENV at %p\n", __FUNCTION__,__LINE__,env_ptr);
 218 #else
 219         /*
 220          * We must allocate a buffer for the environment
 221          */
 222         env_ptr = (env_t *)malloc (CFG_ENV_SIZE);
 223         DEBUGF ("%s[%d] malloced ENV at %p\n", __FUNCTION__,__LINE__,env_ptr);
 224 #endif
 225
 226         /*
 227          * After relocation to RAM, we can always use the "memory" functions
 228          */
 229         env_get_char = env_get_char_memory;
 230
 231         if (gd->env_valid == 0) {
 232 #if defined(CONFIG_GTH) || defined(CFG_ENV_IS_NOWHERE)  /* Environment not changable */
 233                 puts ("Using default environment\n\n");
 234 #else
 235                 puts ("*** Warning - bad CRC, using default environment\n\n");
 236                 SHOW_BOOT_PROGRESS (-1);
 237 #endif
 238
 239                 if (sizeof(default_environment) > ENV_SIZE)
 240                 {
 241                         puts ("*** Error - default environment is too large\n\n");
 242                         return;
 243                 }
 244
 245                 memset (env_ptr, 0, sizeof(env_t));
 246                 memcpy (env_ptr->data,
 247                         default_environment,
 248                         sizeof(default_environment));
 249 #ifdef CFG_REDUNDAND_ENVIRONMENT
 250                 env_ptr->flags = 0xFF;
 251 #endif
 252                 env_crc_update ();
 253                 gd->env_valid = 1;
 254         }
 255         else {
 256                 env_relocate_spec ();
 257         }
 258         gd->env_addr = (ulong)&(env_ptr->data);
 259
 260 #ifdef CONFIG_AMIGAONEG3SE
 261         disable_nvram();
 262 #endif
 263 }