You can try this (this is from The DENX U−Boot and Linux Guide (DULG) for TQM8xxL):
This feature is available in U−Boot if you enable the CONFIG_BOOTCOUNT_LIMIT configuration option. The implementation uses the following environment variables: bootcount: This variable will be automatically created if it does not exist, and it will be updated at each reset of the processor. After a power−on reset, it will be initialized with 1, and each reboot will increment the value by 1. bootlimit: If this variable exists, its contents are taken as the maximum number of reboot cycles allowed. altbootcmd: If, after a reboot, the new value of bootcount exceeds the value of bootlimit, then instead of the standard boot action (executing the contents of bootcmd) an alternate boot action will be performed, and the contents of altbootcmd will be executed. If the variable bootlimit is not defined in the environment, the Boot Count Limit feature is disabled. If it is enabled, but altbootcmd is not defined, then U−Boot will drop into interactive mode and remain there. It is the responsibility of some application code (typically a Linux application) to reset the variable bootcount, thus allowing for more boot cycles. At the moment, the Boot Count Limit feature is available only for MPC8xx and MPC82xx PowerPC processors.
--- Bharathi Subramanian sbharathi@MidasComm.Com wrote:
Hello All,
Recently one of our unit's flash is got corrupted. Bcoz of that, one module is not started. So watch dog is rebooting the unit with-in 2 Sec after booting up.
We thought of booting that unit in NFS and mount the JFFS Data partition for recovering the data file, address book, from that flash. Fortunately the boot delay is Zero. So we coun't do anything.
Is there any trick to get the prompt ??
Bye :)
Bharathi S
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