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_IPADDR
  98         "ipaddr="       MK_STR(CONFIG_IPADDR)           "\0"
  99 #endif
 100 #ifdef  CONFIG_SERVERIP
 101         "serverip="     MK_STR(CONFIG_SERVERIP)         "\0"
 102 #endif
 103 #ifdef  CFG_AUTOLOAD
 104         "autoload="     CFG_AUTOLOAD                    "\0"
 105 #endif
 106 #ifdef  CONFIG_PREBOOT
 107         "preboot="      CONFIG_PREBOOT                  "\0"
 108 #endif
 109 #ifdef  CONFIG_ROOTPATH
 110         "rootpath="     MK_STR(CONFIG_ROOTPATH)         "\0"
 111 #endif
 112 #ifdef  CONFIG_GATEWAYIP
 113         "gatewayip="    MK_STR(CONFIG_GATEWAYIP)        "\0"
 114 #endif
 115 #ifdef  CONFIG_NETMASK
 116         "netmask="      MK_STR(CONFIG_NETMASK)          "\0"
 117 #endif
 118 #ifdef  CONFIG_HOSTNAME
 119         "hostname="     MK_STR(CONFIG_HOSTNAME)         "\0"
 120 #endif
 121 #ifdef  CONFIG_BOOTFILE
 122         "bootfile="     MK_STR(CONFIG_BOOTFILE)         "\0"
 123 #endif
 124 #ifdef  CONFIG_LOADADDR
 125         "loadaddr="     MK_STR(CONFIG_LOADADDR)         "\0"
 126 #endif
 127 #ifdef  CONFIG_CLOCKS_IN_MHZ
 128         "clocks_in_mhz=1\0"
 129 #endif
 130 #if defined(CONFIG_PCI_BOOTDELAY) && (CONFIG_PCI_BOOTDELAY > 0)
 131         "pcidelay="     MK_STR(CONFIG_PCI_BOOTDELAY)    "\0"
 132 #endif
 133 #ifdef  CONFIG_EXTRA_ENV_SETTINGS
 134         CONFIG_EXTRA_ENV_SETTINGS
 135 #endif
 136         "\0"
 137 };
 138
 139
 140 void env_crc_update (void)
 141 {
 142         env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE);
 143 }
 144
 145 static uchar env_get_char_init (int index)
 146 {
 147         DECLARE_GLOBAL_DATA_PTR;
 148         uchar c;
 149
 150         /* if crc was bad, use the default environment */
 151         if (gd->env_valid)
 152         {
 153                 c = env_get_char_spec(index);
 154         } else {
 155                 c = default_environment[index];
 156         }
 157
 158         return (c);
 159 }
 160
 161 #ifdef CONFIG_AMIGAONEG3SE
 162 uchar env_get_char_memory (int index)
 163 {
 164         DECLARE_GLOBAL_DATA_PTR;
 165         uchar retval;
 166         enable_nvram();
 167         if (gd->env_valid) {
 168                 retval = ( *((uchar *)(gd->env_addr + index)) );
 169         } else {
 170                 retval = ( default_environment[index] );
 171         }
 172         disable_nvram();
 173         return retval;
 174 }
 175 #else
 176 uchar env_get_char_memory (int index)
 177 {
 178         DECLARE_GLOBAL_DATA_PTR;
 179
 180         if (gd->env_valid) {
 181                 return ( *((uchar *)(gd->env_addr + index)) );
 182         } else {
 183                 return ( default_environment[index] );
 184         }
 185 }
 186 #endif
 187
 188 uchar *env_get_addr (int index)
 189 {
 190         DECLARE_GLOBAL_DATA_PTR;
 191
 192         if (gd->env_valid) {
 193                 return ( ((uchar *)(gd->env_addr + index)) );
 194         } else {
 195                 return (&default_environment[index]);
 196         }
 197 }
 198
 199 void env_relocate (void)
 200 {
 201         DECLARE_GLOBAL_DATA_PTR;
 202
 203         DEBUGF ("%s[%d] offset = 0x%lx\n", __FUNCTION__,__LINE__,
 204                 gd->reloc_off);
 205
 206 #ifdef CONFIG_AMIGAONEG3SE
 207         enable_nvram();
 208 #endif
 209
 210 #ifdef ENV_IS_EMBEDDED
 211         /*
 212          * The environment buffer is embedded with the text segment,
 213          * just relocate the environment pointer
 214          */
 215         env_ptr = (env_t *)((ulong)env_ptr + gd->reloc_off);
 216         DEBUGF ("%s[%d] embedded ENV at %p\n", __FUNCTION__,__LINE__,env_ptr);
 217 #else
 218         /*
 219          * We must allocate a buffer for the environment
 220          */
 221         env_ptr = (env_t *)malloc (CFG_ENV_SIZE);
 222         DEBUGF ("%s[%d] malloced ENV at %p\n", __FUNCTION__,__LINE__,env_ptr);
 223 #endif
 224
 225         /*
 226          * After relocation to RAM, we can always use the "memory" functions
 227          */
 228         env_get_char = env_get_char_memory;
 229
 230         if (gd->env_valid == 0) {
 231 #if defined(CONFIG_GTH) || defined(CFG_ENV_IS_NOWHERE)  /* Environment not changable */
 232                 puts ("Using default environment\n\n");
 233 #else
 234                 puts ("*** Warning - bad CRC, using default environment\n\n");
 235                 SHOW_BOOT_PROGRESS (-1);
 236 #endif
 237
 238                 if (sizeof(default_environment) > ENV_SIZE)
 239                 {
 240                         puts ("*** Error - default environment is too large\n\n");
 241                         return;
 242                 }
 243
 244                 memset (env_ptr, 0, sizeof(env_t));
 245                 memcpy (env_ptr->data,
 246                         default_environment,
 247                         sizeof(default_environment));
 248 #ifdef CFG_REDUNDAND_ENVIRONMENT
 249                 env_ptr->flags = 0xFF;
 250 #endif
 251                 env_crc_update ();
 252                 gd->env_valid = 1;
 253         }
 254         else {
 255                 env_relocate_spec ();
 256         }
 257         gd->env_addr = (ulong)&(env_ptr->data);
 258
 259 #ifdef CONFIG_AMIGAONEG3SE
 260         disable_nvram();
 261 #endif
 262 }
 263
 264 #ifdef CONFIG_AUTO_COMPLETE
 265 int env_complete(char *var, int maxv, char *cmdv[], int bufsz, char *buf)
 266 {
 267         int i, nxt, len, vallen, found;
 268         const char *lval, *rval;
 269
 270         found = 0;
 271         cmdv[0] = NULL;
 272
 273         len = strlen(var);
 274         /* now iterate over the variables and select those that match */
 275         for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
 276
 277                 for (nxt=i; env_get_char(nxt) != '\0'; ++nxt)
 278                         ;
 279
 280                 lval = env_get_addr(i);
 281                 rval = strchr(lval, '=');
 282                 if (rval != NULL) {
 283                         vallen = rval - lval;
 284                         rval++;
 285                 } else
 286                         vallen = strlen(lval);
 287
 288                 if (len > 0 && (vallen < len || memcmp(lval, var, len) != 0))
 289                         continue;
 290
 291                 if (found >= maxv - 2 || bufsz < vallen + 1) {
 292                         cmdv[found++] = "...";
 293                         break;
 294                 }
 295                 cmdv[found++] = buf;
 296                 memcpy(buf, lval, vallen); buf += vallen; bufsz -= vallen;
 297                 *buf++ = '\0'; bufsz--;
 298         }
 299
 300         cmdv[found] = NULL;
 301         return found;
 302 }
 303 #endif