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https://github.com/AsahiLinux/u-boot
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f93286397e
Modifications are based on the linux kernel approach and support two use cases: 1) Add O= to the make command line 'make O=/tmp/build all' 2) Set environement variable BUILD_DIR to point to the desired location 'export BUILD_DIR=/tmp/build' 'make' The second approach can also be used with a MAKEALL script 'export BUILD_DIR=/tmp/build' './MAKEALL' Command line 'O=' setting overrides BUILD_DIR environent variable. When none of the above methods is used the local build is performed and the object files are placed in the source directory. |
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| .. | ||
| fw_env.c | ||
| fw_env.config | ||
| fw_env.h | ||
| fw_env_main.c | ||
| Makefile | ||
| 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.