How to load application using u-boot for an ARM Processor

Question

I am currently writing an application (very simple and basic hello world program in C) on a 64-bit Linux machine. I've compiled by application using an ARM embedded gcc toolchain by Linero to cross compile the application onto my board. For info, I'm using a FOX G20 V board with an ATMEL AT91SAM9G20 processor.

So, I've compiled my application using: arm-none-eabi-gcc while adding a few options that allow me to use the standard C functions (such as printf etc.). This compiled successfully and I was able to obtain the binary file, ready to load onto my board.

The next step therefore was to compile and build U-Boot to be able to load my application onto my board. I followed the compilation and build using

make ARCH=arm CROSS_COMPILE=${CC} distclean

make ARCH=arm CROSS_COMPILE=${CC} at91sam9g20ek_mmc_config

make ARCH=arm CROSS_COMPILE=${CC}

by specifying to the compiler where exactly the arm-none-eabi-gcc path lies. This compiled and was built successfully.

Now that I have my application binary file, and my U-Boot built and ready for loading, how do I actually load my application onto the board? I've tried to follow tutorials online but have been rather unsuccessful. Ideally, I would like to load my application on the SD Card of my board. Any advice would be greatly appreciated.

Answer 1

Why do not you start from the default hello word program given in u-boot source code only..

Its at u-boot/examples/hello_world.c

Enable it in compilation using its config file and try to load it. This will shows some ways. http://www.denx.de/wiki/view/DULG/UBootStandalone