sprugx8b (Technical Ref. ) and sprs614d (Datasheet) describes the A8 has having 48KB or internal RAM and 64KB of RAM. The datasheet lists (sec. 2.10.4 Cortex A8 Memory Map) identifies the 48KM as mapped at 0x40020000.
Where is the 64KB? Is it the Reserved location at 0x402F0000; Reserved == Unusable ?