Part Number: TMS320F28377D
I have the same issue as the question:
TMS320F28377D: Problem to INIT RAM using debugger TRACE32
With TMS320F28377D, and TRACE32 debugger:
- DxRAM initialization (with DXINIT / DXINITDONE) works
- MSGxRAM initialization (with MSGXINIT / MSGXINITDONE) works
But:
- LSxRAM initialization (with LSXINIT / LSXINITDONE) does not work
- GSxRAM initialization (with GSXINIT / GSXINITDONE) does not work

Notes:
- The EALLOW bit is non-significant when performing accesses by the debugger.
- The GSxRAM is allocated to the correct CPU
When settings LSXINIT/GSXINIT bits to 1, bits in LSXINITDONE/GSXINITDONE stay at 0
Is there any other required configuration in order to have write access to LSXINIT/GSXINIT?