source: SVN/rincon/u-boot/common/env_embedded.c @ 55

/*
 * (C) Copyright 2001
 * Erik Theisen,  Wave 7 Optics, etheisen@mindspring.com.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#ifndef __ASSEMBLY__
#define __ASSEMBLY__                    /* Dirty trick to get only #defines     */
#endif
#define __ASM_STUB_PROCESSOR_H__        /* don't include asm/processor.         */
#include <config.h>
#undef  __ASSEMBLY__
#include <environment.h>

/*
 * Handle HOSTS that have prepended
 * crap on symbol names, not TARGETS.
 */
#if defined(__APPLE__)
/* Leading underscore on symbols */
#  define SYM_CHAR "_"
#else /* No leading character on symbols */
#  define SYM_CHAR
#endif

/*
 * Generate embedded environment table
 * inside U-Boot image, if needed.
 */
#if defined(ENV_IS_EMBEDDED)
/*
 * Only put the environment in it's own section when we are building
 * U-Boot proper.  The host based program "tools/envcrc" does not need
 * a seperate section.  Note that ENV_CRC is only defined when building
 * U-Boot itself.
 */
#if (defined(CFG_USE_PPCENV) || defined(CONFIG_NAND_U_BOOT)) && \
     defined(ENV_CRC) /* Environment embedded in U-Boot .ppcenv section */
/* XXX - This only works with GNU C */
#  define __PPCENV__ __attribute__ ((section(".ppcenv")))
#  define __PPCTEXT__ __attribute__ ((section(".text")))

#elif defined(USE_HOSTCC) /* Native for 'tools/envcrc' */
#  define __PPCENV__ /*XXX DO_NOT_DEL_THIS_COMMENT*/
#  define __PPCTEXT__ /*XXX DO_NOT_DEL_THIS_COMMENT*/

#else /* Environment is embedded in U-Boot's .text section */
/* XXX - This only works with GNU C */
#  define __PPCENV__ __attribute__ ((section(".text")))
#  define __PPCTEXT__ __attribute__ ((section(".text")))
#endif

/*
 * Macros to generate global absolutes.
 */
#if defined(__bfin__)
# define GEN_SET_VALUE(name, value) asm (".set " GEN_SYMNAME(name) ", " GEN_VALUE(value))
#else
# define GEN_SET_VALUE(name, value) asm (GEN_SYMNAME(name) " = " GEN_VALUE(value))
#endif
#define GEN_SYMNAME(str) SYM_CHAR #str
#define GEN_VALUE(str) #str
#define GEN_ABS(name, value) \
                asm (".globl " GEN_SYMNAME(name)); \
                GEN_SET_VALUE(name, value)

/*
 * Macros to transform values
 * into environment strings.
 */
#define XMK_STR(x)      #x
#define MK_STR(x)       XMK_STR(x)

/*
 * Check to see if we are building with a
 * computed CRC.  Otherwise define it as ~0.
 */
#if !defined(ENV_CRC)
#  define ENV_CRC       ~0
#endif

env_t environment __PPCENV__ = {
        ENV_CRC,        /* CRC Sum */
#ifdef CFG_REDUNDAND_ENVIRONMENT
        1,              /* Flags: valid */
#endif
        {
#if defined(CONFIG_BOOTARGS)
        "bootargs="     CONFIG_BOOTARGS                 "\0"
#endif
#if defined(CONFIG_BOOTCOMMAND)
        "bootcmd="      CONFIG_BOOTCOMMAND              "\0"
#endif
#if defined(CONFIG_RAMBOOTCOMMAND)
        "ramboot="      CONFIG_RAMBOOTCOMMAND           "\0"
#endif
#if defined(CONFIG_NFSBOOTCOMMAND)
        "nfsboot="      CONFIG_NFSBOOTCOMMAND           "\0"
#endif
#if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
        "bootdelay="    MK_STR(CONFIG_BOOTDELAY)        "\0"
#endif
#if defined(CONFIG_BAUDRATE) && (CONFIG_BAUDRATE >= 0)
        "baudrate="     MK_STR(CONFIG_BAUDRATE)         "\0"
#endif
#ifdef  CONFIG_LOADS_ECHO
        "loads_echo="   MK_STR(CONFIG_LOADS_ECHO)       "\0"
#endif
#ifdef  CONFIG_ETHADDR
        "ethaddr="      MK_STR(CONFIG_ETHADDR)          "\0"
#endif
#ifdef  CONFIG_ETH1ADDR
        "eth1addr="     MK_STR(CONFIG_ETH1ADDR)         "\0"
#endif
#ifdef  CONFIG_ETH2ADDR
        "eth2addr="     MK_STR(CONFIG_ETH2ADDR)         "\0"
#endif
#ifdef  CONFIG_ETH3ADDR
        "eth3addr="     MK_STR(CONFIG_ETH3ADDR)         "\0"
#endif
#ifdef  CONFIG_ETHPRIME
        "ethprime="     CONFIG_ETHPRIME                 "\0"
#endif
#ifdef  CONFIG_IPADDR
        "ipaddr="       MK_STR(CONFIG_IPADDR)           "\0"
#endif
#ifdef  CONFIG_SERVERIP
        "serverip="     MK_STR(CONFIG_SERVERIP)         "\0"
#endif
#ifdef  CFG_AUTOLOAD
        "autoload="     CFG_AUTOLOAD                    "\0"
#endif
#ifdef  CONFIG_ROOTPATH
        "rootpath="     MK_STR(CONFIG_ROOTPATH)         "\0"
#endif
#ifdef  CONFIG_GATEWAYIP
        "gatewayip="    MK_STR(CONFIG_GATEWAYIP)        "\0"
#endif
#ifdef  CONFIG_NETMASK
        "netmask="      MK_STR(CONFIG_NETMASK)          "\0"
#endif
#ifdef  CONFIG_HOSTNAME
        "hostname="     MK_STR(CONFIG_HOSTNAME)         "\0"
#endif
#ifdef  CONFIG_BOOTFILE
        "bootfile="     MK_STR(CONFIG_BOOTFILE)         "\0"
#endif
#ifdef  CONFIG_LOADADDR
        "loadaddr="     MK_STR(CONFIG_LOADADDR)         "\0"
#endif
#ifdef  CONFIG_PREBOOT
        "preboot="      CONFIG_PREBOOT                  "\0"
#endif
#ifdef  CONFIG_CLOCKS_IN_MHZ
        "clocks_in_mhz=" "1"                            "\0"
#endif
#if defined(CONFIG_PCI_BOOTDELAY) && (CONFIG_PCI_BOOTDELAY > 0)
        "pcidelay="     MK_STR(CONFIG_PCI_BOOTDELAY)    "\0"
#endif
#ifdef  CONFIG_EXTRA_ENV_SETTINGS
        CONFIG_EXTRA_ENV_SETTINGS
#endif
        "\0"            /* Term. env_t.data with 2 NULs */
        }
};
#ifdef CONFIG_ENV_ADDR_REDUND
env_t redundand_environment __PPCENV__ = {
        0,              /* CRC Sum: invalid */
        0,              /* Flags:   invalid */
        {
        "\0"
        }
};
#endif  /* CONFIG_ENV_ADDR_REDUND */

/*
 * These will end up in the .text section
 * if the environment strings are embedded
 * in the image.  When this is used for
 * tools/envcrc, they are placed in the
 * .data/.sdata section.
 *
 */
unsigned long env_size __PPCTEXT__ = sizeof(env_t);

/*
 * Add in absolutes.
 */
GEN_ABS(env_offset, CONFIG_ENV_OFFSET);

#endif /* ENV_IS_EMBEDDED */