uboot命令行用md命令无法读取0X481AE134

请贴出使用的处理器型号及SDK版本。
uboot命令行执行任何指令都会卡死吗？

1.芯片是am3354，sdk版本是

2.U-Boot SPL 2011.09-svn55 (Dec 04 2012 - 09:29:02)
Texas Instruments Revision detection unimplemented
Booting from MMC...
OMAP SD/MMC: 0
reading u-boot.img
reading u-boot.img


U-Boot 2011.09-svn55 (Dec 04 2012 - 09:29:02)

I2C: ready
DRAM: 512 MiB
WARNING: Caches not enabled
Did not find a recognized configuration, assuming General purpose EVM in Profile 0 with Daughter board
NAND: HW ECC Hamming Code selected
512 MiB
MMC: OMAP SD/MMC: 0
*** Warning - bad CRC, using default environment

Net: cpsw
Hit any key to stop autoboot: 0

3.可以查询 0x4804C134，不能查询0x481AE134寄存器的值

0x481AE134是GPIO3，请问GPIO3的时钟域使能了吗？GPIO0和GPIO3是不同的。
看一下TRM Figure 10-2. L4 Topology
www.ti.com.cn/.../spruh73q.pdf

请问能给出一个配置gpio3_oe时钟的方法吗，谢谢！