Difference between revisions of "PandaBoard ES uboot howto"

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(Added CROSS_COMPILE variable to u-boot build instructions)
(Added Panda Category this page may easier be found.)
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Make sure you unmount your SD card prior to removing it from the host PC.
Make sure you unmount your SD card prior to removing it from the host PC.

Latest revision as of 23:47, 30 January 2012

Getting the Source

To get the source code for U-Boot, clone a copy of the Linaro U-Boot stable tree:

mkdir pandaboard-es
cd pandaboard-es
git clone git://git.linaro.org/boot/u-boot-linaro-stable.git
cd u-boot-linaro-stable
git checkout -b pandaboard-es origin/Linaro-u-boot-2011.12

As of 12/18/2011, the master branch tagged Linaro-u-boot-2011.12 produces a working MLO/U-Boot pair which will boot both Panda and Panda-ES boards. Previously, the Panda EA1 with rev ES2.0 silicon would not boot.

Configure and Compile

To configure and compile U-Boot for PandaBoard ES do the following:

export CROSS_COMPILE=arm-none-linux-gnueabi-
make omap4_panda_config

Note: This assumes that you are using and have installed the CodeSourcery 2011.03-41 for ARM GNU/Linux toolchain. If you are using a different toolchain, make sure to adjust the CROSS_COMPILE variable accordingly.

Using "Sourcery CodeBench Lite 2011.09-70 for ARM GNU/Linux" generates a compiler error, as does using the toolchain that comes with Ubuntu's gcc-arm-linux-gnueabi package as follows:

... snip ...
arm-linux-gnueabi-gcc  -g  -Os   -fno-common -ffixed-r8 -msoft-float  -D__KERNEL__ 
  -I/home/rpjday/panda/uboot/u-boot-linaro-stable/include -fno-builtin 
  -ffreestanding -nostdinc -isystem /usr/lib/gcc/arm-linux-gnueabi/4.6.1/include 
  -pipe  -DCONFIG_ARM -D__ARM__ -marm -mabi=aapcs-linux -mno-thumb-interwork -march=armv5 
  -Wall -Wstrict-prototypes -fno-stack-protector -Wno-format-nonliteral -Wno-format-security 
  -o clocks.o clocks.c -c
clocks.c: In function ‘enable_non_essential_clocks’:
clocks.c:420:13: internal compiler error: in decode_addr_const, at varasm.c:2638
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.6/README.Bugs> for instructions.
Preprocessed source stored into /tmp/ccE2XxKg.out file, please attach this to your bugreport.

At the present time, this seems to be a problem with gcc 4.6.1.

GNU gcc 4.6.2 appears to have a fix for this issue. Stay tuned for a How-to on how to build a gcc 4.6.x toolchain that will properly compile u-boot.

Copy Files

Copy the MLO and U-Boot images to the boot partition of your mounted SD card:

cp MLO /media/boot
cp u-boot.img /media/boot

Make sure you unmount your SD card prior to removing it from the host PC.