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Diffstat (limited to 'common/environment.c')
| -rw-r--r-- | common/environment.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/common/environment.c b/common/environment.c new file mode 100644 index 0000000..74bfd62 --- /dev/null +++ b/common/environment.c @@ -0,0 +1,198 @@ +/* + * (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 + */ + +#include <config.h> +#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(CONFIG_FADS) || \ + defined(CONFIG_HYMOD) || \ + defined(CONFIG_ICU862) || \ + defined(CONFIG_R360MPI) || \ + defined(CONFIG_TQM8xxL) || \ + defined(CONFIG_RRVISION) || \ + defined(CONFIG_TRAB) ) && \ + 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. + */ +#define GEN_SYMNAME(str) SYM_CHAR #str +#define GEN_VALUE(str) #str +#define GEN_ABS(name, value) \ + asm (".globl " GEN_SYMNAME(name)); \ + asm (GEN_SYMNAME(name) " = " GEN_VALUE(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_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 +#ifdef CONFIG_EXTRA_ENV_SETTINGS + CONFIG_EXTRA_ENV_SETTINGS +#endif + "\0" /* Term. env_t.data with 2 NULLs */ + } +}; +#ifdef CFG_ENV_ADDR_REDUND +env_t redundand_environment __PPCENV__ = { + 0, /* CRC Sum: invalid */ + 0, /* Flags: invalid */ + { + "\0" + } +}; +#endif /* CFG_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, CFG_ENV_OFFSET); + +#endif /* ENV_IS_EMBEDDED */ |