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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

or 
$ cd u-boot-1.1.6
$ patch -p1 < ../u-boot-1.1.6-yyyymmdd.patch

Make defconfig of the JZSOC based platform, eg:
$ make lepus60b_nand_config (NAND boot for JZ4760B LEPUS board)

$ make lepus_nand_config (NAND boot for JZ4760 LEPUS board)

$ make cetus_nand_config (NAND boot for JZ4755 CETUS board)

$ 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.


*********************************************************************
u-boot-1.1.6-jz-20110417-r1659.patch.gz
  * init verision for JZ4760B on LEPUS board
  * add mbr support for SD card adn inand  
  * add 8K bytes page nand support

u-boot-1.1.6-20101015.patch.gz
  * support pt-702
  * add makefile for android
  * add MDDR_MT46H128M16LF
  * lepus spi boot support
  * add hynix 4K page nand support
  
u-boot-1.1.6-20100724.patch.gz
  * add EMC_MEM_PHY_BASE&EMC_MEM_PHY_BASE_SHIFT
  * change the way to select the card's type sd or mmc , add the way to select the card's capacity high or low,changed by lltangjz_mmc.h
  * add the definition of SD_SEND_IF_COND (CMD8).
  * add support for high capacity MMC.
  * change the CONFIG_BAUDRATE from 115200 to 57600.
  * add support k9gag08uod.
  * add cpm for jz4760 chip.
  * change the pll calc m, n, od and add the limited for __PLL_M
  * Configure UHCCDR Register for JZ4760 UHC.
  * modified for DDR1.
  * rm jz4760.c jz_serial.c cpu.c start.S nand_boot_jz4760.c.
  * change no oob ecc correct.
  * add Commandline Editing and History support for altair board.
  * change eccpos to 24 and bch bit to 4.
  * add support for lepus_nand_config.
  * seprated SDRAM and DDR, seprated MDDR, DDR1 and DDR2 for jz4760.
  * Add jz4760 sleep support when power down p0.
  * add NAND_K9G8G08U0A.h MDDR_H5MS1G62MFP-J3M.h@jz_mem_nand_configs.

u-boot-1.1.6-20100302.patch.gz
  * Added intc and mdma
  * Added sd_mdelay function
  * Modified jz4760.h for spl
  * Change clock to 378MHz for TVE Output.
  * Fixed some bugs for support 16 bit nand flash
  * Added phone board aquila
  * Correct BCH_ERR_INDEX_EVEN_BIT and BCH_ERR_INDEX_ODD_BIT for in jz4760.h,
    added some macros for nand in f4760.h and __gpio_as_nor() for jz4760
  * Added support of 24bit bmp size
  * Supported any frequency of uart by copying some codes from linux kernel
  * Modified cpu/mips/jz_cs8900.c to support JZ4750L
  * Added support for Jz4725B volans board
  * Changed eccbytes to 7 for 512-byte pagesize nand using 4-bit BCH
  * Added 512-byte pagesize configuration in volans.h
  * Modified include/configs/aquila.h to use bootargs for android
  * Supported spi boot for f4760 board
  * Move down #undef ENV_IS_EMBEDDED in env_nand.c to avoid empty env_ptr. 
  * Don't initialize net function for aquila board. 
  * Set CFG_ENV_SIZE to 0x10000 instead of CFG_NAND_BLOCK_SIZE.
  * Supported large DRAM(jz4750>128M, jz4760>256M)
  * Supported spi nor boot from zImage for apus board by undef CONFIG_LOAD_UBOOT in apus.h
  
u-boot-1.1.6-jz-20090903.patch.gz
  * Added Jz4750l platform and board.
  * Added support of jz4750l in start.S.
  * Added __cpm_start_all() in nand_boot_jz4750.c.
  * Changed CFG_NAND_U_BOOT_OFFS to (32 << 10) in f4750l.h.
  * Corrected a bug in __gpio_as_nand_8bit(n) when unshare.
  * Corrected board/f4750l/config.mk for supporting nand_boot.
  * Modified mem to 32M for f4750l in f4750l.h.
  * f4760 used 48M extal clock and sdram boot as default.
  * Avoided a hardware bug of nor flash on fpga.
  * Added mobile sdram args.
  * Fiexed a bug about print.
  * Modified DDRC_CFG_TSEL_BIT from 4 to 18 and added Mobile emrs macros;Modified jz_flush_dcache function (jz4750l.h) and gpio_as_i2c, added sync operation.
  * Added mobile mddr definition, mddr init and mddr config and modified CONFIG_DDR_SDRAM to CONFIG_DDRC.
  * Added Jz4760 surport, fpga paltform and eth driver, added gpio defination of eth and modified jz_eth.c to avoid compile it on JZ4760.
  * Modified board/f4760/f4760.c, added GPIO initialization of ETH, corrected macros in jz4760_eth.h according to jz4760.h.
  * f4760 uart uses 12M clock.
  * Fixed a bug in cpu/mips/jz4760_eth.c and midified some macros.

u-boot-1.1.6-jz-20090506.patch.gz
  * Change the size of Nand SPL from 256 KB to 32KB.
  * You can define CFG_NAND_BCH_WITH_OOB in include/configs/xxx.h to conform 
    NAND ECC with linux kernel.
  * APUS use 4K pagesize nand and 8bit BCH with eccpos equal to 24 as default.
  * Add Jz4755 platform: CETUS board.

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.