3.1 Uboot源码下载：
方法1：Linux中用git下载
$ git clone git://git.linaro.org/boot/u-boot-linaro-stable
方法2：window7下直接下载
从http://www.linaro.org/downloads/找到最新的版本下载
3.2 编译工具下载与编译
window7下直接下载
从http://www.linaro.org/downloads/找到最新的gcc-arm-none-eabi下载
1 下载gcc-arm-none-eabi-4_6-2012q2-20120614.tar.bz2
2 解压源文件参考TI的安装，安装路径为/opt目录，解压源文件到/opt目录下。
$ tar –vxjf gcc-arm-none-eabi-4_6-2012q2-20120614.tar.bz2
3 修改权限
root@fwtdev2:/opt/arm2009q1/gcc-arm-none-eabi-4_6-2012q2/bin#ls -l
total 18008
-rwxr-xr-x 1 rootroot 586368 2012-06-14 00:50arm-none-eabi-addr2line
-rwxr-xr-x 2 rootroot 609576 2012-06-14 00:50 arm-none-eabi-ar
-rwxr-xr-x 2 rootroot 1040992 2012-06-14 00:50 arm-none-eabi-as
-rwxr-xr-x 2 rootroot 270232 2012-06-14 00:50arm-none-eabi-c++
-rwxr-xr-x 1 rootroot 584912 2012-06-14 00:50arm-none-eabi-c++filt
-rwxr-xr-x 1 rootroot 270232 2012-06-14 00:50arm-none-eabi-cpp
-rwxr-xr-x 1 rootroot 21268 2012-06-14 00:50arm-none-eabi-elfedit
-rwxr-xr-x 2 rootroot 270232 2012-06-14 00:50arm-none-eabi-g++
-rwxr-xr-x 2 rootroot 270232 2012-06-14 00:50arm-none-eabi-gcc
-rwxr-xr-x 2 rootroot 270232 2012-06-14 00:50arm-none-eabi-gcc-4.6.2
-rwxr-xr-x 1 rootroot 27284 2012-06-14 00:50arm-none-eabi-gcov
-rwxr-xr-x 1 rootroot 3347224 2012-06-14 00:50 arm-none-eabi-gdb
-rwxr-xr-x 1 rootroot 3347224 2012-06-14 00:50 arm-none-eabi-gdbtui
-rwxr-xr-x 1 rootroot 646420 2012-06-14 00:50arm-none-eabi-gprof
-rwxr-xr-x 4 rootroot 871364 2012-06-14 00:50arm-none-eabi-ld
-rwxr-xr-x 4 rootroot 871364 2012-06-14 00:50arm-none-eabi-ld.bfd
-rwxr-xr-x 2 rootroot 595648 2012-06-14 00:50arm-none-eabi-nm
-rwxr-xr-x 2 rootroot 741964 2012-06-14 00:50arm-none-eabi-objcopy
-rwxr-xr-x 2 rootroot 888832 2012-06-14 00:50arm-none-eabi-objdump
-rwxr-xr-x 2 rootroot 609608 2012-06-14 00:50arm-none-eabi-ranlib
-rwxr-xr-x 1 rootroot 340708 2012-06-14 00:50arm-none-eabi-readelf
-rwxr-xr-x 1 rootroot 587700 2012-06-14 00:50arm-none-eabi-size
-rwxr-xr-x 1 rootroot 587104 2012-06-14 00:50arm-none-eabi-strings
-rwxr-xr-x 2 rootroot 741964 2012-06-14 00:50arm-none-eabi-strip
root@fwtdev2:/opt/arm2009q1/gcc-arm-none-eabi-4_6-2012q2/bin#chmod 777 *
4 执行编译命令
makeCROSS_COMPILE=/opt/arm2009q1/gcc-arm-none-eabi-4_6-2012q2/bin/arm-none-eabi-omap4_panda
5 拷贝生成的MLO u-boot.bin复制到SD卡的第一个FAT32分区
6 重启ES开发板，查看uboot版本与版本生成时间。