Memory Allocation Manager
DMA engines, packet buffers, scratchpad memories: any testbench that needs to hand out addresses for source and destination buffers runs into the same problem eventually. Two sequences pick overlapping ranges by coincidence. A block-level test and a subsystem-level test both assume they own the same region. A register-mapped range gets treated as free memory because nothing told the allocator it wasn’t.
UVM ships an answer to most of this: uvm_mem_mam, the memory allocation manager built into the register layer. It’s underused, and even when it’s used correctly at the block level, it doesn’t automatically solve the reuse problem once a subsystem or SoC environment needs to share allocation state with the blocks underneath it. This series covers the built-in class in depth, and the wrapper most projects end up needing around it.