I have some problems with the fw_printenv tool. I use the following versions of u-boot, kernel and compiler:
- u-boot-2009.11.1 - linux-2.6.22 - gcc-3.4.3-glibc-2.3.2 arm-linux- The problem is that the fw_printenv complains about: "Warning: Bad CRC, using default environment". My U-boot configuration for the environment is: #define PHYS_FLASH_1 0xc0000000 #define CONFIG_ENV_IS_IN_FLASH #define CONFIG_ENV_OFFSET (0x40000) #define CONFIG_ENV_SECT_SIZE 0x20000 /* Env sector Size */ #define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE #define MTDIDS_DEFAULT "nor0=physmap-flash.0" #define MTDPARTS_DEFAULT "mtdparts=physmap-flash.0:256k(uboot)ro,128k(ubootenv),4096k(kernel)" Mtd in u-boot prints: device nor0 <physmap-flash.0>, # parts = 3 #: name size offset mask_flags 0: uboot 0x00040000 0x00000000 1 1: ubootenv 0x00020000 0x00040000 0 2: kernel 0x00400000 0x00060000 0 active partition: nor0,0 - (uboot) 0x00040000 @ 0x00000000 defaults: mtdids : nor0=physmap-flash.0 mtdparts: mtdparts=physmap-flash.0:256k(uboot)ro,128k(ubootenv),4096k(kernel) So my environment is located at 0xc0040000. My /proc/mtd is: dev: size erasesize name mtd0: 00800000 00020000 "NOR flash on Clever" mtd1: 00040000 00020000 "uboot" mtd2: 00020000 00020000 "ubootenv" mtd3: 00400000 00020000 "Kernel" My fw_env.config is: /dev/mtd2 0x0000 0x20000 0x20000 When I copy the /dev/mtd2 to a file I see the environment variables from U-Boot. This starts with "Gøwbootdelay=5" When I do a fw_setenv bootdelay 4, it says "Warning: Bad CRC, using default environment". But if I use then fw_printenv everything is fine. If I copy the contents of /dev/mtd2 to a file is starts with: "Ð U(bootcmd=bootp". So I can write the environment from linux but not read it from u-boot. If I restarts my board U-boot compains about a bad CRC (this is the expected result). So I looks like the offsets are wrong because my kernel image get damaged after saving the environment from linux.
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