FPGARM4U U-boot

Get source file and patches for the bootloader

The U-Boot sources used are the one from the official Denx repository ftp://ftp.denx.de/pub/ (http://www.denx.de/wiki/UBoot/WebHome) .

# wget ftp://ftp.denx.de/pub/u-boot/u-boot-1.1.5.tar.bz2

The U-Boot patch for the AT91 architecture are from http://www.linux4sam.org .

# wget ftp://www.linux4sam.org/pub/uboot/u-boot-1.1.5_atmel_1.6/u-boot-1.1.5_atmel_1.6.diff

The U-Boot patch for the FPGARM4U board are to be used against Atmel's one.

# wget ... u-boot-1.1.5_atmel_1.6-Fpgarm4U.patch ...

Untar and patch the U-Boot source files

Untar the source tarball

# tar xjf u-boot-1.1.5.tar.bz2

Copy the patch files in the working directory

# cp u-boot-1.1.5_atmel_1.6.diff u-boot-1.1.5/
# cp u-boot-1.1.5_atmel_1.6-Fpgarm4U.patch u-boot-1.1.5/

Enter in the working directory

# cd u-boot-1.1.5/

Apply the two patches:

# cat u-boot-1.1.5_atmel_1.6.diff ¦ patch -p1
# cat u-boot-1.1.5_atmel_1.6-Fpgarm4U.patch ¦ patch -p1

Compile the bootloader for the ARM architecture

Compile the u-boot binary

# make distclean

Create the config files related to the Fpgarm4U board

# make Fpgarm4U_config

Start the compiler work on thte cource files:

# make CROSS_COMPILE=arm-linux-gnu-

At the end of the process the binary file of the bootloader is "FPGARM4U - u-boot.bin" in the main directory.

In the "tools" directory you can find the binary file "mkimage" that will be used later to add some header information to the Linux Kernel Image file.