how UEFI’s memory map evolves

The Intel Firmware blog has a new post from last week, talking about how UEFI’s memory structures evolve from init onward:

A question that is often asked is “how does the UEFI memory map evolve, from UEFI PI PEI to DXE to the data structures exposed to the operating system via the GetMemoryMap() boot service?” […]

https://firmware.intel.com/blog/uefi-memory-map