common/environment.c

   1 /*
   2  * (C) Copyright 2001
   3  * Erik Theisen,  Wave 7 Optics, etheisen@mindspring.com.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #ifndef __ASSEMBLY__
  25 #define __ASSEMBLY__                    /* Dirty trick to get only #defines     */
  26 #endif
  27 #define __ASM_STUB_PROCESSOR_H__        /* don't include asm/processor.         */
  28 #include <config.h>
  29 #undef  __ASSEMBLY__
  30 #include <environment.h>
  31
  32 #if defined(CFG_ENV_OFFSET_PATCHED)
  33 unsigned long env_offset = CFG_ENV_OFFSET_PATCHED;
  34 #elif defined(CFG_ENV_OFFSET_OOB)
  35 unsigned long env_offset = CFG_ENV_OFFSET_OOB;
  36 #endif
  37
  38 /*
  39  * Handle HOSTS that have prepended
  40  * crap on symbol names, not TARGETS.
  41  */
  42 #if defined(__APPLE__)
  43 /* Leading underscore on symbols */
  44 #  define SYM_CHAR "_"
  45 #else /* No leading character on symbols */
  46 #  define SYM_CHAR
  47 #endif
  48
  49 /*
  50  * Generate embedded environment table
  51  * inside U-Boot image, if needed.
  52  */
  53 #if defined(ENV_IS_EMBEDDED)
  54 /*
  55  * Only put the environment in it's own section when we are building
  56  * U-Boot proper.  The host based program "tools/envcrc" does not need
  57  * a seperate section.  Note that ENV_CRC is only defined when building
  58  * U-Boot itself.
  59  */
  60 #if (defined(CFG_USE_PPCENV) || defined(CONFIG_NAND_U_BOOT)) && \
  61      defined(ENV_CRC) /* Environment embedded in U-Boot .ppcenv section */
  62 /* XXX - This only works with GNU C */
  63 #  define __PPCENV__ __attribute__ ((section(".ppcenv")))
  64 #  define __PPCTEXT__ __attribute__ ((section(".text")))
  65
  66 #elif defined(USE_HOSTCC) /* Native for 'tools/envcrc' */
  67 #  define __PPCENV__ /*XXX DO_NOT_DEL_THIS_COMMENT*/
  68 #  define __PPCTEXT__ /*XXX DO_NOT_DEL_THIS_COMMENT*/
  69
  70 #else /* Environment is embedded in U-Boot's .text section */
  71 /* XXX - This only works with GNU C */
  72 #  define __PPCENV__ __attribute__ ((section(".text")))
  73 #  define __PPCTEXT__ __attribute__ ((section(".text")))
  74 #endif
  75
  76 /*
  77  * Macros to generate global absolutes.
  78  */
  79 #if defined(__bfin__)
  80 # define GEN_SET_VALUE(name, value) asm (".set " GEN_SYMNAME(name) ", " GEN_VALUE(value))
  81 #else
  82 # define GEN_SET_VALUE(name, value) asm (GEN_SYMNAME(name) " = " GEN_VALUE(value))
  83 #endif
  84 #define GEN_SYMNAME(str) SYM_CHAR #str
  85 #define GEN_VALUE(str) #str
  86 #define GEN_ABS(name, value) \
  87                 asm (".globl " GEN_SYMNAME(name)); \
  88                 GEN_SET_VALUE(name, value)
  89
  90 /*
  91  * Macros to transform values
  92  * into environment strings.
  93  */
  94 #define XMK_STR(x)      #x
  95 #define MK_STR(x)       XMK_STR(x)
  96
  97 /*
  98  * Check to see if we are building with a
  99  * computed CRC.  Otherwise define it as ~0.
 100  */
 101 #if !defined(ENV_CRC)
 102 #  define ENV_CRC       ~0
 103 #endif
 104
 105 env_t environment __PPCENV__ = {
 106         ENV_CRC,        /* CRC Sum */
 107 #ifdef CFG_REDUNDAND_ENVIRONMENT
 108         1,              /* Flags: valid */
 109 #endif
 110         {
 111 #if defined(CONFIG_BOOTARGS)
 112         "bootargs="     CONFIG_BOOTARGS                 "\0"
 113 #endif
 114 #if defined(CONFIG_BOOTCOMMAND)
 115         "bootcmd="      CONFIG_BOOTCOMMAND              "\0"
 116 #endif
 117 #if defined(CONFIG_RAMBOOTCOMMAND)
 118         "ramboot="      CONFIG_RAMBOOTCOMMAND           "\0"
 119 #endif
 120 #if defined(CONFIG_NFSBOOTCOMMAND)
 121         "nfsboot="      CONFIG_NFSBOOTCOMMAND           "\0"
 122 #endif
 123 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 124         "bootdelay="    MK_STR(CONFIG_BOOTDELAY)        "\0"
 125 #endif
 126 #if defined(CONFIG_BAUDRATE) && (CONFIG_BAUDRATE >= 0)
 127         "baudrate="     MK_STR(CONFIG_BAUDRATE)         "\0"
 128 #endif
 129 #ifdef  CONFIG_LOADS_ECHO
 130         "loads_echo="   MK_STR(CONFIG_LOADS_ECHO)       "\0"
 131 #endif
 132 #ifdef  CONFIG_ETHADDR
 133         "ethaddr="      MK_STR(CONFIG_ETHADDR)          "\0"
 134 #endif
 135 #ifdef  CONFIG_ETH1ADDR
 136         "eth1addr="     MK_STR(CONFIG_ETH1ADDR)         "\0"
 137 #endif
 138 #ifdef  CONFIG_ETH2ADDR
 139         "eth2addr="     MK_STR(CONFIG_ETH2ADDR)         "\0"
 140 #endif
 141 #ifdef  CONFIG_ETH3ADDR
 142         "eth3addr="     MK_STR(CONFIG_ETH3ADDR)         "\0"
 143 #endif
 144 #ifdef  CONFIG_ETHPRIME
 145         "ethprime="     CONFIG_ETHPRIME                 "\0"
 146 #endif
 147 #ifdef  CONFIG_IPADDR
 148         "ipaddr="       MK_STR(CONFIG_IPADDR)           "\0"
 149 #endif
 150 #ifdef  CONFIG_SERVERIP
 151         "serverip="     MK_STR(CONFIG_SERVERIP)         "\0"
 152 #endif
 153 #ifdef  CFG_AUTOLOAD
 154         "autoload="     CFG_AUTOLOAD                    "\0"
 155 #endif
 156 #ifdef  CONFIG_ROOTPATH
 157         "rootpath="     MK_STR(CONFIG_ROOTPATH)         "\0"
 158 #endif
 159 #ifdef  CONFIG_GATEWAYIP
 160         "gatewayip="    MK_STR(CONFIG_GATEWAYIP)        "\0"
 161 #endif
 162 #ifdef  CONFIG_NETMASK
 163         "netmask="      MK_STR(CONFIG_NETMASK)          "\0"
 164 #endif
 165 #ifdef  CONFIG_HOSTNAME
 166         "hostname="     MK_STR(CONFIG_HOSTNAME)         "\0"
 167 #endif
 168 #ifdef  CONFIG_BOOTFILE
 169         "bootfile="     MK_STR(CONFIG_BOOTFILE)         "\0"
 170 #endif
 171 #ifdef  CONFIG_LOADADDR
 172         "loadaddr="     MK_STR(CONFIG_LOADADDR)         "\0"
 173 #endif
 174 #ifdef  CONFIG_PREBOOT
 175         "preboot="      CONFIG_PREBOOT                  "\0"
 176 #endif
 177 #ifdef  CONFIG_CLOCKS_IN_MHZ
 178         "clocks_in_mhz=" "1"                            "\0"
 179 #endif
 180 #if defined(CONFIG_PCI_BOOTDELAY) && (CONFIG_PCI_BOOTDELAY > 0)
 181         "pcidelay="     MK_STR(CONFIG_PCI_BOOTDELAY)    "\0"
 182 #endif
 183 #ifdef  CONFIG_EXTRA_ENV_SETTINGS
 184         CONFIG_EXTRA_ENV_SETTINGS
 185 #endif
 186         "\0"            /* Term. env_t.data with 2 NULs */
 187         }
 188 };
 189 #ifdef CFG_ENV_ADDR_REDUND
 190 env_t redundand_environment __PPCENV__ = {
 191         0,              /* CRC Sum: invalid */
 192         0,              /* Flags:   invalid */
 193         {
 194         "\0"
 195         }
 196 };
 197 #endif  /* CFG_ENV_ADDR_REDUND */
 198
 199 /*
 200  * These will end up in the .text section
 201  * if the environment strings are embedded
 202  * in the image.  When this is used for
 203  * tools/envcrc, they are placed in the
 204  * .data/.sdata section.
 205  *
 206  */
 207 unsigned long env_size __PPCTEXT__ = sizeof(env_t);
 208
 209 /*
 210  * Add in absolutes.
 211  */
 212 GEN_ABS(env_offset, CFG_ENV_OFFSET);
 213
 214 #endif /* ENV_IS_EMBEDDED */