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omapl138 sometime boot stop at u-boot but most can start normal

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Omapll138 sometime will stop at u-boot at difference space, but used debug tools, connect with ARM9 , can see the  "PC" value are 0xFFFD45DC, this address is in the ARM local ROM. 

The following information is differen stop space. Why the cpu go to 0xFFFD45DC ?

MMC boot...
davinci: 0
spl: mmc device found


U-Boot 2012.04.01-00067-g127d2ea-dirty (May 26 2016 - 19:55:41)

I2C: ready
DRAM: 128 MiB
WARNING: Caches not enabled
NAND: 512 MiB
MMC: davinci: 0
Bad block table not found for chip 0
Bad block table not found for chip 0

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MMC boot...
davinci: 0
spl: mmc device found


U-Boot 2012.04.01-00067-g127d2ea-dirty (May 26 2016 - 19:55:41)

I2C: ready
DRAM: 128 MiB
WARNING: Caches not enabled
NAND:


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