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 /*
  33  * Handle HOSTS that have prepended
  34  * crap on symbol names, not TARGETS.
  35  */
  36 #if defined(__APPLE__)
  37 /* Leading underscore on symbols */
  38 #  define SYM_CHAR "_"
  39 #else /* No leading character on symbols */
  40 #  define SYM_CHAR
  41 #endif
  42
  43 /*
  44  * Generate embedded environment table
  45  * inside U-Boot image, if needed.
  46  */
  47 #if defined(ENV_IS_EMBEDDED)
  48 /*
  49  * Only put the environment in it's own section when we are building
  50  * U-Boot proper.  The host based program "tools/envcrc" does not need
  51  * a seperate section.  Note that ENV_CRC is only defined when building
  52  * U-Boot itself.
  53  */
  54 #if (defined(CONFIG_CMI)        || \
  55      defined(CONFIG_FADS)       || \
  56      defined(CONFIG_HYMOD)      || \
  57      defined(CONFIG_ICU862)     || \
  58      defined(CONFIG_R360MPI)    || \
  59      defined(CONFIG_TQM8xxL)    || \
  60      defined(CONFIG_RRVISION)   || \
  61      defined(CONFIG_TRAB)       || \
  62      defined(CONFIG_PPCHAMELEONEVB) || \
  63      defined(CONFIG_M5271EVB))  && \
  64      defined(ENV_CRC) /* Environment embedded in U-Boot .ppcenv section */
  65 /* XXX - This only works with GNU C */
  66 #  define __PPCENV__ __attribute__ ((section(".ppcenv")))
  67 #  define __PPCTEXT__ __attribute__ ((section(".text")))
  68
  69 #elif defined(USE_HOSTCC) /* Native for 'tools/envcrc' */
  70 #  define __PPCENV__ /*XXX DO_NOT_DEL_THIS_COMMENT*/
  71 #  define __PPCTEXT__ /*XXX DO_NOT_DEL_THIS_COMMENT*/
  72
  73 #else /* Environment is embedded in U-Boot's .text section */
  74 /* XXX - This only works with GNU C */
  75 #  define __PPCENV__ __attribute__ ((section(".text")))
  76 #  define __PPCTEXT__ __attribute__ ((section(".text")))
  77 #endif
  78
  79 /*
  80  * Macros to generate global absolutes.
  81  */
  82 #define GEN_SYMNAME(str) SYM_CHAR #str
  83 #define GEN_VALUE(str) #str
  84 #define GEN_ABS(name, value) \
  85                 asm (".globl " GEN_SYMNAME(name)); \
  86                 asm (GEN_SYMNAME(name) " = " GEN_VALUE(value))
  87
  88 /*
  89  * Macros to transform values
  90  * into environment strings.
  91  */
  92 #define XMK_STR(x)      #x
  93 #define MK_STR(x)       XMK_STR(x)
  94
  95 /*
  96  * Check to see if we are building with a
  97  * computed CRC.  Otherwise define it as ~0.
  98  */
  99 #if !defined(ENV_CRC)
 100 #  define ENV_CRC       ~0
 101 #endif
 102
 103 env_t environment __PPCENV__ = {
 104         ENV_CRC,        /* CRC Sum */
 105 #ifdef CFG_REDUNDAND_ENVIRONMENT
 106         1,              /* Flags: valid */
 107 #endif
 108         {
 109 #if defined(CONFIG_BOOTARGS)
 110         "bootargs="     CONFIG_BOOTARGS                 "\0"
 111 #endif
 112 #if defined(CONFIG_BOOTCOMMAND)
 113         "bootcmd="      CONFIG_BOOTCOMMAND              "\0"
 114 #endif
 115 #if defined(CONFIG_RAMBOOTCOMMAND)
 116         "ramboot="      CONFIG_RAMBOOTCOMMAND           "\0"
 117 #endif
 118 #if defined(CONFIG_NFSBOOTCOMMAND)
 119         "nfsboot="      CONFIG_NFSBOOTCOMMAND           "\0"
 120 #endif
 121 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 122         "bootdelay="    MK_STR(CONFIG_BOOTDELAY)        "\0"
 123 #endif
 124 #if defined(CONFIG_BAUDRATE) && (CONFIG_BAUDRATE >= 0)
 125         "baudrate="     MK_STR(CONFIG_BAUDRATE)         "\0"
 126 #endif
 127 #ifdef  CONFIG_LOADS_ECHO
 128         "loads_echo="   MK_STR(CONFIG_LOADS_ECHO)       "\0"
 129 #endif
 130 #ifdef  CONFIG_ETHADDR
 131         "ethaddr="      MK_STR(CONFIG_ETHADDR)          "\0"
 132 #endif
 133 #ifdef  CONFIG_ETH1ADDR
 134         "eth1addr="     MK_STR(CONFIG_ETH1ADDR)         "\0"
 135 #endif
 136 #ifdef  CONFIG_ETH2ADDR
 137         "eth2addr="     MK_STR(CONFIG_ETH2ADDR)         "\0"
 138 #endif
 139 #ifdef  CONFIG_ETH3ADDR
 140         "eth3addr="     MK_STR(CONFIG_ETH3ADDR)         "\0"
 141 #endif
 142 #ifdef  CONFIG_ETHPRIME
 143         "ethprime="     CONFIG_ETHPRIME                 "\0"
 144 #endif
 145 #ifdef  CONFIG_IPADDR
 146         "ipaddr="       MK_STR(CONFIG_IPADDR)           "\0"
 147 #endif
 148 #ifdef  CONFIG_SERVERIP
 149         "serverip="     MK_STR(CONFIG_SERVERIP)         "\0"
 150 #endif
 151 #ifdef  CFG_AUTOLOAD
 152         "autoload="     CFG_AUTOLOAD                    "\0"
 153 #endif
 154 #ifdef  CONFIG_ROOTPATH
 155         "rootpath="     MK_STR(CONFIG_ROOTPATH)         "\0"
 156 #endif
 157 #ifdef  CONFIG_GATEWAYIP
 158         "gatewayip="    MK_STR(CONFIG_GATEWAYIP)        "\0"
 159 #endif
 160 #ifdef  CONFIG_NETMASK
 161         "netmask="      MK_STR(CONFIG_NETMASK)          "\0"
 162 #endif
 163 #ifdef  CONFIG_HOSTNAME
 164         "hostname="     MK_STR(CONFIG_HOSTNAME)         "\0"
 165 #endif
 166 #ifdef  CONFIG_BOOTFILE
 167         "bootfile="     MK_STR(CONFIG_BOOTFILE)         "\0"
 168 #endif
 169 #ifdef  CONFIG_LOADADDR
 170         "loadaddr="     MK_STR(CONFIG_LOADADDR)         "\0"
 171 #endif
 172 #ifdef  CONFIG_PREBOOT
 173         "preboot="      CONFIG_PREBOOT                  "\0"
 174 #endif
 175 #ifdef  CONFIG_CLOCKS_IN_MHZ
 176         "clocks_in_mhz=" "1"                            "\0"
 177 #endif
 178 #if defined(CONFIG_PCI_BOOTDELAY) && (CONFIG_PCI_BOOTDELAY > 0)
 179         "pcidelay="     MK_STR(CONFIG_PCI_BOOTDELAY)    "\0"
 180 #endif
 181 #ifdef  CONFIG_EXTRA_ENV_SETTINGS
 182         CONFIG_EXTRA_ENV_SETTINGS
 183 #endif
 184         "\0"            /* Term. env_t.data with 2 NULs */
 185         }
 186 };
 187 #ifdef CFG_ENV_ADDR_REDUND
 188 env_t redundand_environment __PPCENV__ = {
 189         0,              /* CRC Sum: invalid */
 190         0,              /* Flags:   invalid */
 191         {
 192         "\0"
 193         }
 194 };
 195 #endif  /* CFG_ENV_ADDR_REDUND */
 196
 197 /*
 198  * These will end up in the .text section
 199  * if the environment strings are embedded
 200  * in the image.  When this is used for
 201  * tools/envcrc, they are placed in the
 202  * .data/.sdata section.
 203  *
 204  */
 205 unsigned long env_size __PPCTEXT__ = sizeof(env_t);
 206
 207 /*
 208  * Add in absolutes.
 209  */
 210 GEN_ABS(env_offset, CFG_ENV_OFFSET);
 211
 212 #endif /* ENV_IS_EMBEDDED */