Merge pull request #9 from 3mdeb/scom_init_notes

Notes about SCOM init implementation

Author: macpijan

devnotes/scom_init_plan.md

@@ -0,0 +1,25 @@
+# About this document
+This document describes plans of implementing SCOM init steps 8.9 and 8.10
+
+# soc
+Here files that are directly responsible for soc
+- Add ibm directory
+  - Add power9 directory
+    - Add Kconfig specific to POWER9 family
+    - Add bootblock, and romstage that are responsible for cpu configuration
+    - Memlayout is already defined in Motherboard section,\
+      so it is probably not needed here.\
+      Memlayout should be moved to SoC directory
+    - Add chip.c for cpu structures
+  - Add Kconfig for all POWER processors
+
+# Access to scom
+According to Christian Geddes, access to SCOM is possible through XSCOM
+using offset 0x000603FC00000000\
+[source](https://lists.ozlabs.org/pipermail/openpower-firmware/2020-December/000602.html)
+
+# Mainboard
+- Memory layout
+- Bootblock
+
+# Summary