device-tree-bindings/memory/memory.txt

3 The memory binding for U-Boot is as in the ePAPR with the following additions:
5 Optional subnodes can be used defining the memory layout for different board
6 ID masks. To match a set of board ids, a board-id node may define match-mask
7 and match-value ints to define a mask to apply to the board id, and the value
9 defaults to -1, meaning that the value must fully match the board id.
13 - #address-cells: should be 1.
14 - #size-cells: should be 0.
18  reg - board ID or mask for this subnode
19  memory-banks - list of memory banks in the same format as normal
23  match-mask - A mask to apply to the board id.  This must be accompanied by
24               match-value.
25  match-value - The required resulting value of the board id mask for the given
27  auto-size - Indicates that the value given for a bank is the maximum size,
32 The board id determination is up to the vendor and is not defined by this
38 	#address-cells = <1>;
39 	#size-cells = <1>;
44 	auto-size;
45 	board-id@0 {
46 		match-value = <17>;
50 	board-id@1 {
51 		match-mask = <2>;
52 		match-value = <2>;
65 * Default of 2GB of memory, auto-sized, so could be smaller
66 * 3.5GB of memory (with no auto-size) if (board id & 2) is 2
67 * 1GB of memory (with no auto-size) if board id is 17.