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Steps to build the u-boot:

Download and install the cross toolchain gcc version 4:

$ cd /opt
$ tar xjf mipseltools-gcc412-glibc261.tar.bz2
$ export PATH=/opt/mipseltools-gcc412-glibc261/bin:$PATH

Download the u-boot tarball u-boot-1.1.6.tar.bz2 and unpack it:

$ tar xjf u-boot-1.1.6.tar.bz2

Download the latest u-boot patch and patch it to the u-boot tree:

$ cd u-boot-1.1.6
$ gzip -cd ../u-boot-1.1.6-jz-yyyymmdd.patch.gz | patch -p1

Make defconfig of the JZSOC based platform, eg:

$ make apus_nand_config (NAND boot for JZ4750 APUS board)

$ make pavo_config (NOR boot for JZ4740 PAVO board)
or
$ make pavo_nand_config (NAND boot for JZ4740 PAVO board)

$ make pmpv2_config (NOR boot for JZ4730 PMP Ver 2.x board)
or
$ make pmpv2_nand_config (NAND boot for JZ4730 PMP Ver 2.x board)

Build the u-boot:

$ make

Then burn the u-boot-nand.bin (for NAND flash) or u-boot.bin (for NOR flash)
to the target board by using JDI or USB boot tool.


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u-boot-1.1.6-jz-20090306.patch.gz
  * Nand driver was modified to support using nandwrite_mlc utils in linux to
    write uImage:
    nandwrite_mlc -a -p /dev/mtd2 uImage

u-boot-1.1.6-jz-20090216.patch.gz

  * Support Jz4750
  * Support NAND of 4KB pagesize
  * The ECC position in NAND oob could be modified by defining CFG_NAND_ECC_POS 
    in include/configs/xxx.h

u-boot-1.1.6-jz-20080530.patch.gz:

  * Added Jz4725 DIPPER Board Support.
  * Added FOXCONN_PT035TN01 LCD panel support for PAVO board.
  * Modify jz4740_nand.c to optimize the RS correction algorithm.

u-boot-1.1.6-jz-20080414.patch.gz:

  * nand_spl/nand_boot_jz4740.c: fixed a fatal bug of nand_load(), which will
    fail to load u-boot when meeting a bad block.
  * Modify the nand read/write/erase commands to enable the bad block handling.

u-boot-1.1.6-jz-20080226.patch.gz:

  * Fixed method to test NAND bad block.

u-boot-1.1.6-jz-20071205.patch.gz:

  * Add Jz4720 virgo board.
  * Add SD 2.0 (SDHC) card support.
  * Fix the nand wirte command.

u-boot-1.1.6-jz-20071026.patch.gz:

  * Full package support for Jz4730 and Jz4740.