Initial revision

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 */