Hi ! I am unable to load a different u-boot.img/u-boot.bin which is located in a different ext4 partition from the u-boot shell. Here are my observations.
1) i compiled a U-boot.img with a print statement(THIS IS A NEW U_BOOT) in (board_init) function in board.c file and placed it in the Boot partition of SD 2) Compiled again removing the print statement and placed the u-boot.bin in the Root partition of SD under BOOTHERE 3) Start the board and stoped it in the shell U-Boot SPL 2014.07 (Aug 29 2014 - 15:16:50) reading u-boot.img reading u-boot.img U-Boot 2014.07 (Sep 16 2014 - 17:51:00) I2C: ready DRAM: 256 MiB THIS IS A NEW U_BOOT MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1 Using default environment Net: <ethaddr> not set. Validating first E-fuse MAC cpsw Hit any key to stop autoboot: 0 U-Boot# U-Boot# U-Boot# 4) Try to load the u-boot.bin from ext4 partition U-Boot# ext4load mmc 0:2 0x83000000 /BOOTHERE/u-boot.bin 303420 bytes read in 77 ms (3.8 MiB/s) U-Boot# go 0x83000000 ## Starting application at 0x83000000 ... U-Boot 2014.07 (Sep 16 2014 - 17:51:00) I2C: ready DRAM: 256 MiB THIS IS A NEW U_BOOT MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1 Using default environment Net: <ethaddr> not set. Validating first E-fuse MAC cpsw Hit any key to stop autoboot: 0 switch to partitions #0, OK mmc1(part 0) is current device EMMC found on device 1 ** Unrecognized filesystem type ** uenvcmd was not defined in uEnv.txt ... halting ... switch to partitions #0, OK mmc0 is current device SD CARD DEVICE found on device 0 reading uEnv.txt ** Unable to read file uEnv.txt ** uenvcmd was not defined in uEnv.txt ... trying eMMC (uEnv.txt) ... U-Boot# I observe that it is running the previous u-boot.img but not the updated u-boot.bin. When i try to load the u-boot.img in the shell it resets the board and the application does not run U-Boot# U-Boot# ext4load mmc 0:2 0x83000000 /BOOTHERE/u-boot.img 303484 bytes read in 82 ms (3.5 MiB/s) U-Boot# go 0x83000000 ## Starting application at 0x83000000 ... IT is stuck here.. and then board resets I tried putting the u-boot.bin in the same fat partition with MLO and u-boot.img and even with fatload mmc 0:1 0x80200000 u-boot.bin go 0x80200000 It still runs the previously loaded u-boot.img. Is there a way i can load an updated u-boot from a u-boot? Thanks, KJ -- View this message in context: http://u-boot.10912.n7.nabble.com/Running-updated-U-boot-img-u-boot-bin-from-already-loaded-u-boot-shell-tp189648.html Sent from the U-Boot mailing list archive at Nabble.com. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
