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AM625: uboot下不能访问gpmc配置寄存器!

Part Number: AM625

在最新SDK(ti-processor-sdk-linux-am62xx-evm-08.06.00.42)下我需要在uboot阶段配置GPMC接口,当我配置寄存器0X3B0000000空间段室,CPU抛出异常

3b000c00:"Synchronous Abort" handler, esr 0x96000010
elr: 000000008088bbec lr : 000000008088bb50 (reloc)
elr: 00000000fff9abec lr : 00000000fff9ab50
x0 : 0000000000000009 x1 : 0000000000000000
x2 : 000000000000003a x3 : 0000000000000000
x4 : 000000003b000c00 x5 : 00000000f7ee3e68
x6 : 00000000fffbcae5 x7 : 0000000000000004
x8 : 00000000f7ee44d8 x9 : 0000000000000008
x10: 00000000ffffffd0 x11: 0000000000000010
x12: 0000000000000006 x13: 000000000001869f
x14: 00000000f7ee48a0 x15: 0000000000000021
x16: 00000000fff603b0 x17: 0000000000000000
x18: 00000000f7eeede0 x19: 0000000000000001
x20: 000000003b000c00 x21: 000000003b000c00
x22: 00000000fffbaf9c x23: 0000000000000008
x24: 0000000000000009 x25: 0000000000000004
x26: 0000000000000004 x27: 00000000f7ee4598
x28: 0000000000000001 x29: 00000000f7ee4510