common/env_embedded.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 /* Handle HOSTS that have prepended crap on symbol names, not TARGETS. */
  33 #if defined(__APPLE__)
  34 /* Leading underscore on symbols */
  35 #  define SYM_CHAR "_"
  36 #else /* No leading character on symbols */
  37 #  define SYM_CHAR
  38 #endif
  39
  40 /*
  41  * Generate embedded environment table
  42  * inside U-Boot image, if needed.
  43  */
  44 #if defined(ENV_IS_EMBEDDED) || defined(CONFIG_BUILD_ENVCRC)
  45 /*
  46  * Only put the environment in it's own section when we are building
  47  * U-Boot proper.  The host based program "tools/envcrc" does not need
  48  * a seperate section.  Note that ENV_CRC is only defined when building
  49  * U-Boot itself.
  50  */
  51 #if (defined(CONFIG_SYS_USE_PPCENV) || defined(CONFIG_NAND_U_BOOT)) && \
  52         defined(ENV_CRC) /* Environment embedded in U-Boot .ppcenv section */
  53 /* XXX - This only works with GNU C */
  54 #  define __PPCENV__    __attribute__ ((section(".ppcenv")))
  55 #  define __PPCTEXT__   __attribute__ ((section(".text")))
  56
  57 #elif defined(USE_HOSTCC) /* Native for 'tools/envcrc' */
  58 #  define __PPCENV__    /*XXX DO_NOT_DEL_THIS_COMMENT*/
  59 #  define __PPCTEXT__   /*XXX DO_NOT_DEL_THIS_COMMENT*/
  60
  61 #else /* Environment is embedded in U-Boot's .text section */
  62 /* XXX - This only works with GNU C */
  63 #  define __PPCENV__    __attribute__ ((section(".text")))
  64 #  define __PPCTEXT__   __attribute__ ((section(".text")))
  65 #endif
  66
  67 /*
  68  * Macros to generate global absolutes.
  69  */
  70 #if defined(__bfin__)
  71 # define GEN_SET_VALUE(name, value)     \
  72         asm(".set " GEN_SYMNAME(name) ", " GEN_VALUE(value))
  73 #else
  74 # define GEN_SET_VALUE(name, value)     \
  75         asm(GEN_SYMNAME(name) " = " GEN_VALUE(value))
  76 #endif
  77 #define GEN_SYMNAME(str)        SYM_CHAR #str
  78 #define GEN_VALUE(str)          #str
  79 #define GEN_ABS(name, value)                    \
  80         asm(".globl " GEN_SYMNAME(name));       \
  81         GEN_SET_VALUE(name, value)
  82
  83 /*
  84  * Macros to transform values
  85  * into environment strings.
  86  */
  87 #define XMK_STR(x)      #x
  88 #define MK_STR(x)       XMK_STR(x)
  89
  90 /*
  91  * Check to see if we are building with a
  92  * computed CRC.  Otherwise define it as ~0.
  93  */
  94 #if !defined(ENV_CRC)
  95 #  define ENV_CRC       (~0)
  96 #endif
  97
  98 env_t environment __PPCENV__ = {
  99         ENV_CRC,        /* CRC Sum */
 100 #ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
 101         1,              /* Flags: valid */
 102 #endif
 103         {
 104 #if defined(CONFIG_BOOTARGS)
 105         "bootargs="     CONFIG_BOOTARGS                 "\0"
 106 #endif
 107 #if defined(CONFIG_BOOTCOMMAND)
 108         "bootcmd="      CONFIG_BOOTCOMMAND              "\0"
 109 #endif
 110 #if defined(CONFIG_RAMBOOTCOMMAND)
 111         "ramboot="      CONFIG_RAMBOOTCOMMAND           "\0"
 112 #endif
 113 #if defined(CONFIG_NFSBOOTCOMMAND)
 114         "nfsboot="      CONFIG_NFSBOOTCOMMAND           "\0"
 115 #endif
 116 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 117         "bootdelay="    MK_STR(CONFIG_BOOTDELAY)        "\0"
 118 #endif
 119 #if defined(CONFIG_BAUDRATE) && (CONFIG_BAUDRATE >= 0)
 120         "baudrate="     MK_STR(CONFIG_BAUDRATE)         "\0"
 121 #endif
 122 #ifdef  CONFIG_LOADS_ECHO
 123         "loads_echo="   MK_STR(CONFIG_LOADS_ECHO)       "\0"
 124 #endif
 125 #ifdef  CONFIG_ETHADDR
 126         "ethaddr="      MK_STR(CONFIG_ETHADDR)          "\0"
 127 #endif
 128 #ifdef  CONFIG_ETH1ADDR
 129         "eth1addr="     MK_STR(CONFIG_ETH1ADDR)         "\0"
 130 #endif
 131 #ifdef  CONFIG_ETH2ADDR
 132         "eth2addr="     MK_STR(CONFIG_ETH2ADDR)         "\0"
 133 #endif
 134 #ifdef  CONFIG_ETH3ADDR
 135         "eth3addr="     MK_STR(CONFIG_ETH3ADDR)         "\0"
 136 #endif
 137 #ifdef  CONFIG_ETH4ADDR
 138         "eth4addr="     MK_STR(CONFIG_ETH4ADDR)         "\0"
 139 #endif
 140 #ifdef  CONFIG_ETH5ADDR
 141         "eth5addr="     MK_STR(CONFIG_ETH5ADDR)         "\0"
 142 #endif
 143 #ifdef  CONFIG_ETHPRIME
 144         "ethprime="     CONFIG_ETHPRIME                 "\0"
 145 #endif
 146 #ifdef  CONFIG_IPADDR
 147         "ipaddr="       MK_STR(CONFIG_IPADDR)           "\0"
 148 #endif
 149 #ifdef  CONFIG_SERVERIP
 150         "serverip="     MK_STR(CONFIG_SERVERIP)         "\0"
 151 #endif
 152 #ifdef  CONFIG_SYS_AUTOLOAD
 153         "autoload="     CONFIG_SYS_AUTOLOAD             "\0"
 154 #endif
 155 #ifdef  CONFIG_ROOTPATH
 156         "rootpath="     CONFIG_ROOTPATH                 "\0"
 157 #endif
 158 #ifdef  CONFIG_GATEWAYIP
 159         "gatewayip="    MK_STR(CONFIG_GATEWAYIP)        "\0"
 160 #endif
 161 #ifdef  CONFIG_NETMASK
 162         "netmask="      MK_STR(CONFIG_NETMASK)          "\0"
 163 #endif
 164 #ifdef  CONFIG_HOSTNAME
 165         "hostname="     MK_STR(CONFIG_HOSTNAME)         "\0"
 166 #endif
 167 #ifdef  CONFIG_BOOTFILE
 168         "bootfile="     CONFIG_BOOTFILE                 "\0"
 169 #endif
 170 #ifdef  CONFIG_LOADADDR
 171         "loadaddr="     MK_STR(CONFIG_LOADADDR)         "\0"
 172 #endif
 173 #ifdef  CONFIG_PREBOOT
 174         "preboot="      CONFIG_PREBOOT                  "\0"
 175 #endif
 176 #ifdef  CONFIG_CLOCKS_IN_MHZ
 177         "clocks_in_mhz=" "1"                            "\0"
 178 #endif
 179 #if defined(CONFIG_PCI_BOOTDELAY) && (CONFIG_PCI_BOOTDELAY > 0)
 180         "pcidelay="     MK_STR(CONFIG_PCI_BOOTDELAY)    "\0"
 181 #endif
 182 #ifdef  CONFIG_ENV_VARS_UBOOT_CONFIG
 183         "arch="         CONFIG_SYS_ARCH                 "\0"
 184         "cpu="          CONFIG_SYS_CPU                  "\0"
 185         "board="        CONFIG_SYS_BOARD                "\0"
 186 #ifdef CONFIG_SYS_VENDOR
 187         "vendor="       CONFIG_SYS_VENDOR               "\0"
 188 #endif
 189 #ifdef CONFIG_SYS_SOC
 190         "soc="          CONFIG_SYS_SOC                  "\0"
 191 #endif
 192 #endif
 193 #ifdef  CONFIG_EXTRA_ENV_SETTINGS
 194         CONFIG_EXTRA_ENV_SETTINGS
 195 #endif
 196         "\0"            /* Term. env_t.data with 2 NULs */
 197         }
 198 };
 199 #ifdef CONFIG_ENV_ADDR_REDUND
 200 env_t redundand_environment __PPCENV__ = {
 201         0,              /* CRC Sum: invalid */
 202         0,              /* Flags:   invalid */
 203         {
 204         "\0"
 205         }
 206 };
 207 #endif  /* CONFIG_ENV_ADDR_REDUND */
 208
 209 /*
 210  * These will end up in the .text section
 211  * if the environment strings are embedded
 212  * in the image.  When this is used for
 213  * tools/envcrc, they are placed in the
 214  * .data/.sdata section.
 215  *
 216  */
 217 unsigned long env_size __PPCTEXT__ = sizeof(env_t);
 218
 219 /*
 220  * Add in absolutes.
 221  */
 222 GEN_ABS(env_offset, CONFIG_ENV_OFFSET);
 223
 224 #endif /* ENV_IS_EMBEDDED */