1P9 memory hierarchy
2-------------------
3P9 Nimbus supports direct attached DDR memory through 4 DDR ports per side
4of the processor. Device tree contains memory hierarchy so that one can
5traverse from chip to DIMM like below:
6
7  xscom@<addr>/mcbist@<mcbist_id>/mcs@<mcs_id>/mca@<mca_id>/dimm@<resource_id>
8
9Example of dimm node:
10.. code-block:: dts
11
12  dimm@d00e {
13          memory-id = <0xc>; /* DRAM Device Type. 0xc = DDR4 */
14          product-version = <0x32>; /* Module Revision Code */
15          device_type = "memory-dimm-ddr4";
16          serial-number = <0x15d9ad1c>;
17          status = "okay";
18          size = <0x4000>;
19          phandle = <0xd2>;
20          ibm,loc-code = "UOPWR.0000000-Node0-DIMM14";
21          part-number = "36ASF2G72PZ-2G6B2   ";
22          reg = <0xd00e>;
23          manufacturer-id = <0x802c>; /* Vendor ID, we can get vendor name from this ID */
24  };
25