Hi, There is a note in the device tree spec: "When booting via [UEFI], the system memory map is obtained via the GetMemoryMap() UEFI boot time service as defined in [UEFI] § 7.2, and if present, the OS must ignore any /memory nodes." I can't recall (or never knew) the reason for this...does anyone know? I am trying to work out how to represent the sort of memory mappings maintained by UEFI boot-time services, within devicetree. As an example, I'd like to indicate the memory used by the ACPI tables. Should we: 1. Use the /memory node and add a property for usage (e.g. usage = "acpi") 2. Use the /reserved-memory node and add a property for usage (e.g. usage = "acpi") 3. Create a new /memory-usage node with its own binding The problem with 1 is that it is mostly used for physical memory and we don't want loads of entries in there 2 looks good if we can use 'compatible' for other things, e.g. compatible = "acpi". 3 is an option, but it seems to duplicate 2? If you have any ideas or guidance, please let me know. Thanks, Simon
