U-Boot Davinci Bootcount Manager
U-Boot implements a boot count
scheme that can be
used to detect multiple failed attempts to boot Linux. On Davinci (TI AM
335x) the bootcount is stored in the RTC SCRATCH2 register. However there's
no way to read or write this register from userspace. This tool provides a
means to read and write the bootcount value.
Usage
If invoked without any args, bootcount will read and print the current value
to stdout. When passing the -r flag, it will reset the bootcount value
~ # bootcount
42
~ # bootcount -r # <-- prints nothing to stdout, exit code 0 means success
~ # bootcount
0
~ #
Building
Assuming you're doing a cross-build from x86 host to ARM target:
./autogen.sh
./configure --host=arm-linux-gnueabihf --prefix=/usr
make
make install DESTDIR=$LOCATION_OF_CHROOT