dmap       - adds a MMU DTLB mapping
dunmap     - removes a MMU DTLB mapping
dtlbi      - invalidates the whole DTLB
dmapi      - invalidates a DTLB mapping
mmu        - activates MMU
nommu      - disactivates MMU
mmuread    - reads from memory with MMU enabled
mmuwrite   - writes to memory with MMU enabled
dtlbtest   - runs DTLB MMU load store tests
detest     - runs DTLB MMU exception handling tests
BIOS> dmap 0x44001000 0x44002000
mapping 0x44001000->0x44002000 in slot 9 [0x446616e8]
BIOS> dmapi 0x44001000
BIOS> mmuwrite 0x44001000 0x01020304

And there you hang =)