u-boot

History

wdenk 3bac351370 * Patch by Josef Wagner, 12 Mar 2003: - 16/32 MB and 50/80 MHz support with auto-detection for IP860 - ETH05 and BEDBUG support for CU824 - added support for MicroSys CPC45 - new BOOTROM/FLASH0 and DOC base for PM826 * Patch by Robert Schwebel, 12 Mar 2003: Fix the chpart command on innokom board * Name cleanup: mv include/asm-i386/ppcboot-i386.h include/asm-i386/u-boot-i386.h s/PPCBoot/U-Boot/ in some files s/pImage/uImage/ in some files * Patch by Detlev Zundel, 15 Jan 2003: Fix '' command line quoting * Patch by The LEOX team, 19 Jan 2003: - add support for the ELPT860 board - add support for Dallas ds164x RTC		2003-03-12 10:41:04 +00:00
..
fw_env_main.c	* Patch by Josef Wagner, 12 Mar 2003:	2003-03-12 10:41:04 +00:00
fw_env.c	* Add support for 16 MB flash configuration of TRAB board	2003-02-28 00:49:47 +00:00
fw_env.config	* Restrict baudrate settings on LWMON to higher speeds	2003-01-11 09:48:40 +00:00
fw_env.h	* Restrict baudrate settings on LWMON to higher speeds	2003-01-11 09:48:40 +00:00
Makefile	* Use 1-byte-read instead of -write for iprobe() function	2002-12-17 01:51:00 +00:00
README	* Restrict baudrate settings on LWMON to higher speeds	2003-01-11 09:48:40 +00:00

README

This is a demo implementation of a Linux command line tool to access
the U-Boot's environment variables.

For the run-time utiltity configuration uncomment the line
#define CONFIG_FILE  "/etc/fw_env.config"
in fw_env.h.

See comments in the fw_env.config file for definitions for the
particular board.

Configuration can also be done via #defines in the fw_env.h file. The
following lines are relevant:

#define HAVE_REDUND	/* For systems with 2 env sectors */
#define DEVICE1_NAME	"/dev/mtd1"
#define DEVICE2_NAME	"/dev/mtd2"
#define DEVICE1_OFFSET    0x0000
#define ENV1_SIZE         0x4000
#define DEVICE1_ESIZE     0x4000
#define DEVICE2_OFFSET    0x0000
#define ENV2_SIZE         0x4000
#define DEVICE2_ESIZE     0x4000

Current configuration matches the environment layout of the TRAB
board.

Un-define HAVE_REDUND, if you want to use the utlities on a system
that does not have support for redundant environment enabled.
If HAVE_REDUND is undefined, DEVICE2_NAME is ignored,
as is ENV2_SIZE and DEVICE2_ESIZE.

The DEVICEx_NAME constants define which MTD character devices are to
be used to access the environment.

The DEVICEx_OFFSET constants define the environment offset within the
MTD character device.

ENVx_SIZE defines the size in bytes taken by the environment, which
may be less then flash sector size, if the environment takes less
then 1 sector.

DEVICEx_ESIZE defines the size of the first sector in the flash
partition where the environment resides.