\author: Cesar Fuguet
\date  : July 24, 2014

TSAR BOOT-LOADER

Files:
src/        Source files
            The entry point of this boot loader is the file reset.S

include/    Header files

driver/     Drivers source files and headers

conf/       Platform specific files and ldscript
            For each platform, we must define a new directory.
            Mandatory files:

              - hard_config.h (can be generated using giet-vm genmap tool)

              - ldscript

            Optional files:

              - platform.dts (platform device tree)

Makefile    Makefile to compile the boot loader.
            Mandatory arguments:

              - PLATFORM_DIR=<platform_dir>

                Defines the directory where to find the plateform specific
                files

           Optional arguments:

              - USE_DT=<value>

                Value can be 1 or 0.
                If a device tree file is not used, set this flag to 0. It is
                set by default to 1.

              - SYSTEM_CLK=<platform clock frequency>

                Platform clock frequency in KHz

              - DTS=<file.dts>

                Platform device tree (by default is platform.dts)

Examples:

    make PLATFORM_DIR=<platform_dir> USE_DT=0

        Compile for <platform_dir> and do not compile device tree file

    make PLATFORM_DIR=<platform_dir> DTS=platform_fpga.dts SYSTEM_CLK=25000

        Compile for <platform_dir> and compile the 'platform_dpga.dts'
        device tree file. System clock frequency is 25 MHz

    make PLATFORM_DIR=<platform_conf> SYSTEM_CLK=25000

        Compile for <platform_dir> and compile the 'platform.dts'
        device tree file (default name). System clock frequency is 25 MHz