ヘルプ
英语（美国） | English (US) 日本語 | Japanese 中文 | Chinese (Simplified)

How to access u boot environment from linux?

キャンセル
提案をオンにする
自動提案では、入力時に可能な一致が提案されるので検索結果を素早く絞り込むことができます。
次の結果を表示 
表示  限定  | 次の代わりに検索 
もしかして: 

How to access u boot environment from linux?

‎07-03-2013 01:24 PM
5,375件の閲覧回数
akomarov80
Contributor I

Hello

I try to make firmware update tool for imx35. But i have one problem (

How can I access and change the u-Boot env variables in linux. Using the u-boot/tools/env directory in u boot directory:

u-boot$ make env

Which created the executable file fw_printenv. I copied this to /usr/sbin and on target etc/fw_env.config file:

# Configuration file for fw_(printenv/saveenv) utility. # Up to two entries are valid, in this case the redundand # environment sector is assumed present. # MTD device name Device offset Env. size Flash sector size /dev/mtd0 0x00000 0x20000 0x80000 

target#./fw_printenv 



What is causing this error?


Warning: Bad CRC, using default environment


bootcmd=bootp; setenv bootargs root=/dev/nfs nfsroot=${serverip}:${rootpath} ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}::off; bootm


bootdelay=5


baudrate=115200




target# cat /proc/mtd


dev:    size   erasesize  name


mtd0: 00080000 00020000 "Bootloader"


mtd1: 00300000 00020000 "nor.Kernel.1"


mtd2: 00300000 00020000 "nor.Kernel.2"


mtd3: 01c00000 00020000 "nor.rootfs.1"


mtd4: 01c00000 00020000 "nor.rootfs.2"


mtd5: 00003000 00020000 "FIS directory"


mtd6: 02001000 00020000 "Redboot config"


mtd7: 00300000 00080000 "nand.bootloader"


mtd8: 00500000 00080000 "nand.kernel"


mtd9: 10000000 00080000 "nand.rootfs"


mtd10: 00800000 00080000 "nand.configure"


mtd11: 6f000000 00080000 "nand.userfs"

(((

返信
1 返信

‎09-12-2013 01:41 AM
1,725件の閲覧回数
Yuri
NXP Employee
NXP Employee

Basically it is possible to build U-boot tools (particularly -

fw_printenw) under LTIB using U-boot package :

$ ./ltib -m prep -p u-boot

$ ./ltib -m scbuild -p u-boot

$ ./ltib -m shell

LTIB> cd rpm/BUILD/u-boot-2009.08

LTIB> make env

After that directory rpm/BUILD/u-boot-2009.08 /tools/env contains the needed files.

To configure correctly fw_env.config, please use section FLASH and environment

organization in board header file (say, mx35_3stack.h or mx35_3stack_mmc.h)
in U-boot directory

include/configs/mx35_<reference board name>.h

There environment parameters are as following :

CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, CONFIG_ENV_SIZE.

Linux fw_env.config may be as following :

# MTD device name    Device offset      Env. size    Flash sector size Number of sectors

/dev/mtd0                 0xC0000            0x2000              0x2000        1

Device offset = CONFIG_ENV_OFFSET in mx35_3stack.h (768 * 1024)

  1. Env. size = CONFIG_ENV_SIZE in mx35_3stack.h (128 * 1024)

Flash sector size = CONFIG_ENV_SIZE.

返信