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 <linux/stddef.h>
  31 #include <malloc.h>
  32
  33 #ifdef CONFIG_SHOW_BOOT_PROGRESS
  34 # include <status_led.h>
  35 # define SHOW_BOOT_PROGRESS(arg)        show_boot_progress(arg)
  36 #else
  37 # define SHOW_BOOT_PROGRESS(arg)
  38 #endif
  39
  40 #ifdef CONFIG_AMIGAONEG3SE
  41         extern void enable_nvram(void);
  42         extern void disable_nvram(void);
  43 #endif
  44
  45 #undef DEBUG_ENV
  46 #ifdef DEBUG_ENV
  47 #define DEBUGF(fmt,args...) printf(fmt ,##args)
  48 #else
  49 #define DEBUGF(fmt,args...)
  50 #endif
  51
  52 extern env_t *env_ptr;
  53
  54 extern void env_relocate_spec (void);
  55 extern uchar env_get_char_spec(int);
  56
  57 static uchar env_get_char_init (int index);
  58 uchar (*env_get_char)(int) = env_get_char_init;
  59
  60 /************************************************************************
  61  * Default settings to be used when no valid environment is found
  62  */
  63 #define XMK_STR(x)      #x
  64 #define MK_STR(x)       XMK_STR(x)
  65
  66 uchar default_environment[] = {
  67 #ifdef  CONFIG_BOOTARGS
  68         "bootargs="     CONFIG_BOOTARGS                 "\0"
  69 #endif
  70 #ifdef  CONFIG_BOOTCOMMAND
  71         "bootcmd="      CONFIG_BOOTCOMMAND              "\0"
  72 #endif
  73 #ifdef  CONFIG_RAMBOOTCOMMAND
  74         "ramboot="      CONFIG_RAMBOOTCOMMAND           "\0"
  75 #endif
  76 #ifdef  CONFIG_NFSBOOTCOMMAND
  77         "nfsboot="      CONFIG_NFSBOOTCOMMAND           "\0"
  78 #endif
  79 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
  80         "bootdelay="    MK_STR(CONFIG_BOOTDELAY)        "\0"
  81 #endif
  82 #if defined(CONFIG_BAUDRATE) && (CONFIG_BAUDRATE >= 0)
  83         "baudrate="     MK_STR(CONFIG_BAUDRATE)         "\0"
  84 #endif
  85 #ifdef  CONFIG_LOADS_ECHO
  86         "loads_echo="   MK_STR(CONFIG_LOADS_ECHO)       "\0"
  87 #endif
  88 #ifdef  CONFIG_ETHADDR
  89         "ethaddr="      MK_STR(CONFIG_ETHADDR)          "\0"
  90 #endif
  91 #ifdef  CONFIG_ETH1ADDR
  92         "eth1addr="     MK_STR(CONFIG_ETH1ADDR)         "\0"
  93 #endif
  94 #ifdef  CONFIG_ETH2ADDR
  95         "eth2addr="     MK_STR(CONFIG_ETH2ADDR)         "\0"
  96 #endif
  97 #ifdef  CONFIG_ETH3ADDR
  98         "eth3addr="     MK_STR(CONFIG_ETH3ADDR)         "\0"
  99 #endif
 100 #ifdef  CONFIG_IPADDR
 101         "ipaddr="       MK_STR(CONFIG_IPADDR)           "\0"
 102 #endif
 103 #ifdef  CONFIG_SERVERIP
 104         "serverip="     MK_STR(CONFIG_SERVERIP)         "\0"
 105 #endif
 106 #ifdef  CFG_AUTOLOAD
 107         "autoload="     CFG_AUTOLOAD                    "\0"
 108 #endif
 109 #ifdef  CONFIG_PREBOOT
 110         "preboot="      CONFIG_PREBOOT                  "\0"
 111 #endif
 112 #ifdef  CONFIG_ROOTPATH
 113         "rootpath="     MK_STR(CONFIG_ROOTPATH)         "\0"
 114 #endif
 115 #ifdef  CONFIG_GATEWAYIP
 116         "gatewayip="    MK_STR(CONFIG_GATEWAYIP)        "\0"
 117 #endif
 118 #ifdef  CONFIG_NETMASK
 119         "netmask="      MK_STR(CONFIG_NETMASK)          "\0"
 120 #endif
 121 #ifdef  CONFIG_HOSTNAME
 122         "hostname="     MK_STR(CONFIG_HOSTNAME)         "\0"
 123 #endif
 124 #ifdef  CONFIG_BOOTFILE
 125         "bootfile="     MK_STR(CONFIG_BOOTFILE)         "\0"
 126 #endif
 127 #ifdef  CONFIG_LOADADDR
 128         "loadaddr="     MK_STR(CONFIG_LOADADDR)         "\0"
 129 #endif
 130 #ifdef  CONFIG_CLOCKS_IN_MHZ
 131         "clocks_in_mhz=1\0"
 132 #endif
 133 #if defined(CONFIG_PCI_BOOTDELAY) && (CONFIG_PCI_BOOTDELAY > 0)
 134         "pcidelay="     MK_STR(CONFIG_PCI_BOOTDELAY)    "\0"
 135 #endif
 136 #ifdef  CONFIG_EXTRA_ENV_SETTINGS
 137         CONFIG_EXTRA_ENV_SETTINGS
 138 #endif
 139         "\0"
 140 };
 141
 142 #if defined(CFG_ENV_IS_IN_NAND)         /* Environment is in Nand Flash */
 143 int default_environment_size = sizeof(default_environment);
 144 #endif
 145
 146 void env_crc_update (void)
 147 {
 148         env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE);
 149 }
 150
 151 static uchar env_get_char_init (int index)
 152 {
 153         DECLARE_GLOBAL_DATA_PTR;
 154         uchar c;
 155
 156         /* if crc was bad, use the default environment */
 157         if (gd->env_valid)
 158         {
 159                 c = env_get_char_spec(index);
 160         } else {
 161                 c = default_environment[index];
 162         }
 163
 164         return (c);
 165 }
 166
 167 #ifdef CONFIG_AMIGAONEG3SE
 168 uchar env_get_char_memory (int index)
 169 {
 170         DECLARE_GLOBAL_DATA_PTR;
 171         uchar retval;
 172         enable_nvram();
 173         if (gd->env_valid) {
 174                 retval = ( *((uchar *)(gd->env_addr + index)) );
 175         } else {
 176                 retval = ( default_environment[index] );
 177         }
 178         disable_nvram();
 179         return retval;
 180 }
 181 #else
 182 uchar env_get_char_memory (int index)
 183 {
 184         DECLARE_GLOBAL_DATA_PTR;
 185
 186         if (gd->env_valid) {
 187                 return ( *((uchar *)(gd->env_addr + index)) );
 188         } else {
 189                 return ( default_environment[index] );
 190         }
 191 }
 192 #endif
 193
 194 uchar *env_get_addr (int index)
 195 {
 196         DECLARE_GLOBAL_DATA_PTR;
 197
 198         if (gd->env_valid) {
 199                 return ( ((uchar *)(gd->env_addr + index)) );
 200         } else {
 201                 return (&default_environment[index]);
 202         }
 203 }
 204
 205 void env_relocate (void)
 206 {
 207         DECLARE_GLOBAL_DATA_PTR;
 208
 209         DEBUGF ("%s[%d] offset = 0x%lx\n", __FUNCTION__,__LINE__,
 210                 gd->reloc_off);
 211
 212 #ifdef CONFIG_AMIGAONEG3SE
 213         enable_nvram();
 214 #endif
 215
 216 #ifdef ENV_IS_EMBEDDED
 217         /*
 218          * The environment buffer is embedded with the text segment,
 219          * just relocate the environment pointer
 220          */
 221         env_ptr = (env_t *)((ulong)env_ptr + gd->reloc_off);
 222         DEBUGF ("%s[%d] embedded ENV at %p\n", __FUNCTION__,__LINE__,env_ptr);
 223 #else
 224         /*
 225          * We must allocate a buffer for the environment
 226          */
 227         env_ptr = (env_t *)malloc (CFG_ENV_SIZE);
 228         DEBUGF ("%s[%d] malloced ENV at %p\n", __FUNCTION__,__LINE__,env_ptr);
 229 #endif
 230
 231         /*
 232          * After relocation to RAM, we can always use the "memory" functions
 233          */
 234         env_get_char = env_get_char_memory;
 235
 236         if (gd->env_valid == 0) {
 237 #if defined(CONFIG_GTH) || defined(CFG_ENV_IS_NOWHERE)  /* Environment not changable */
 238                 puts ("Using default environment\n\n");
 239 #else
 240                 puts ("*** Warning - bad CRC, using default environment\n\n");
 241                 SHOW_BOOT_PROGRESS (-1);
 242 #endif
 243
 244                 if (sizeof(default_environment) > ENV_SIZE)
 245                 {
 246                         puts ("*** Error - default environment is too large\n\n");
 247                         return;
 248                 }
 249
 250                 memset (env_ptr, 0, sizeof(env_t));
 251                 memcpy (env_ptr->data,
 252                         default_environment,
 253                         sizeof(default_environment));
 254 #ifdef CFG_REDUNDAND_ENVIRONMENT
 255                 env_ptr->flags = 0xFF;
 256 #endif
 257                 env_crc_update ();
 258                 gd->env_valid = 1;
 259         }
 260         else {
 261                 env_relocate_spec ();
 262         }
 263         gd->env_addr = (ulong)&(env_ptr->data);
 264
 265 #ifdef CONFIG_AMIGAONEG3SE
 266         disable_nvram();
 267 #endif
 268 }
 269
 270 #ifdef CONFIG_AUTO_COMPLETE
 271 int env_complete(char *var, int maxv, char *cmdv[], int bufsz, char *buf)
 272 {
 273         int i, nxt, len, vallen, found;
 274         const char *lval, *rval;
 275
 276         found = 0;
 277         cmdv[0] = NULL;
 278
 279         len = strlen(var);
 280         /* now iterate over the variables and select those that match */
 281         for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
 282
 283                 for (nxt=i; env_get_char(nxt) != '\0'; ++nxt)
 284                         ;
 285
 286                 lval = env_get_addr(i);
 287                 rval = strchr(lval, '=');
 288                 if (rval != NULL) {
 289                         vallen = rval - lval;
 290                         rval++;
 291                 } else
 292                         vallen = strlen(lval);
 293
 294                 if (len > 0 && (vallen < len || memcmp(lval, var, len) != 0))
 295                         continue;
 296
 297                 if (found >= maxv - 2 || bufsz < vallen + 1) {
 298                         cmdv[found++] = "...";
 299                         break;
 300                 }
 301                 cmdv[found++] = buf;
 302                 memcpy(buf, lval, vallen); buf += vallen; bufsz -= vallen;
 303                 *buf++ = '\0'; bufsz--;
 304         }
 305
 306         cmdv[found] = NULL;
 307         return found;
 308 }
 309 #endif