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