本人的板子为BeagleBone Black开发板，芯片版本为PG2.1，环境为AM335x Linux SDK 6.0开发包。想通过USB的方式烧写系统。
按照BeagleBone Black eMMC 烧写全记录(基于 AM335x SDK06).pdf中的方法制作了u-boot-spl-restore.bin（u-boot-spl.bin） 、 u-boot-restore.img（u-boot.img）、uImage。将u-boot-spl.bin重命名为MLO之后，按照PDF中的方法将MLO， u-boot.img 和 uImage 压缩成boot_partition.tar.gz。
以下为我用USB烧写的时候打印的log：
U-Boot SPL 2014.04-00014-g47880f5 (Apr 22 2014 - 13:23:54)
reading args
spl_load_image_fat_os: error reading image args, err - -1
reading u-boot.img
reading u-boot.img
U-Boot 2014.04-00014-g47880f5 (Apr 22 2014 - 13:23:54)
I2C: ready
DRAM: 512 MiB
NAND: 0 MiB
MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1
*** Warning - readenv() failed, using default environment
Net: <ethaddr> not set. Validating first E-fuse MAC
cpsw, usb_ether
Hit any key to stop autoboot: 1 0
gpio: pin 53 (gpio 53) value is 1
Card did not respond to voltage select!
mmc0(part 0) is current device
Card did not respond to voltage select!
gpio: pin 56 (gpio 56) value is 0
gpio: pin 55 (gpio 55) value is 0
gpio: pin 54 (gpio 54) value is 0
mmc1(part 0) is current device
gpio: pin 54 (gpio 54) value is 1
SD/MMC found on device 1
reading uEnv.txt
1552 bytes read in 6 ms (252 KiB/s)
gpio: pin 55 (gpio 55) value is 1
Loaded environment from uEnv.txt
Importing environment from mmc ...
Checking if uenvcmd is set ...
gpio: pin 56 (gpio 56) value is 1
Running uenvcmd ...
reading zImage
3717760 bytes read in 207 ms (17.1 MiB/s)
reading initrd.img
2868982 bytes read in 179 ms (15.3 MiB/s)
reading /dtbs/am335x-boneblack.dtb
25080 bytes read in 11 ms (2.2 MiB/s)
Kernel image @ 0x82000000 [ 0x000000 - 0x38ba80 ]
## Flattened Device Tree blob at 88000000
Booting using the fdt blob at 0x88000000
Using Device Tree in place at 88000000, end 880091f7
Starting kernel ...
Uncompressing Linux... done, booting the kernel.
[ 0.383075] omap2_mbox_probe: platform not supported
[ 0.549808] tps65217-bl tps65217-bl: no platform data provided
[ 0.614919] bone-capemgr bone_capemgr.9: slot #0: No cape found
[ 0.652025] bone-capemgr bone_capemgr.9: slot #1: No cape found
[ 0.689133] bone-capemgr bone_capemgr.9: slot #2: No cape found
[ 0.726242] bone-capemgr bone_capemgr.9: slot #3: No cape found
[ 0.760551] omap_hsmmc mmc.5: of_parse_phandle_with_args of 'reset' failed
[ 0.843968] pinctrl-single 44e10800.pinmux: pin 44e10854 already requested by 44e10800.pinmux; cannot claim for gpio-leds.8
[ 0.855700] pinctrl-single 44e10800.pinmux: pin-21 (gpio-leds.8) status -22
[ 0.862995] pinctrl-single 44e10800.pinmux: could not request pin 21 on device pinctrl-single
Loading, please wait...
Scanning for Btrfs filesystems
systemd-fsck[218]: rootfs: clean, 77460/233856 files, 388020/933632 blocks
Debian GNU/Linux 7 beaglebone ttyO0
default username:password is [debian:temppwd]
Support/FAQ: elinux.org/Beagleboard:BeagleBoneBlack_Debian
The IP Address for usb0 is: 192.168.7.2
beaglebone login: [ 23.174419] libphy: PHY 4a101000.mdio:01 not found
[ 23.179658] net eth0: phy 4a101000.mdio:01 not found on slave 1
烧写步骤：按照Sitara Uniflash Quick Start Guide.pdf中的步骤设置IP地址
