gudt/docs/DD_nvsmem.md

Non-volatile System Memory

Node format

Offset	Size	Description
0	1	type = 0xdd
1	1	flags = 0
2	2	parent node
4	4	area size
8	8	area address

This memory area must be preserved during hybernation. In combination with types 0xde, 0xdf and 0xe0, can be used to describe a memory map.

Do not confuse with NVRAM (type 0xe5), this memory region must be preserved by the operating system.

JSON format

{
    "type": "NVSMEM",
    "parent": (string) parent device's name,
    "size": (number) area size,
    "base": (number) area address
}