Hello Rodney McLendon ,
This value is configured by the system automatically.
For the DDR less than 2G the start address is configured as 0x0, for DDR larger than 2G, it is configured as 0x10000000.
Have a great day,
Yiping
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QCVS assumes that LAW for first DDR region is set starting with 0x0 and have 2Gbytes in size. To be able to change the start address you should use a size at most 2Gbytes.
Adrian