From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Fri, 26 Feb 2021 13:50:04 +0000 (+0000)
Subject: comment on CoreState
X-Git-Tag: convert-csv-opcode-to-binary~152
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=755e84aba04a4cc02e535fcd269d126b7d4f556a;p=soc.git

comment on CoreState
---

diff --git a/src/soc/config/state.py b/src/soc/config/state.py
index ebc5bb86..a3972ef1 100644
--- a/src/soc/config/state.py
+++ b/src/soc/config/state.py
@@ -4,6 +4,13 @@ from soc.sv.svstate import SVSTATERec
 
 
 class CoreState(RecordObject):
+    """contains "Core State Information" which says exactly where things are
+
+    example: eint says to PowerDecoder that it should fire an exception
+    rather than let the current decoded instruction proceed.  likewise
+    if dec goes negative.  MSR contains LE/BE and Priv state.  PC contains
+    the Program Counter, and SVSTATE is the Sub-Program-Counter.
+    """
     def __init__(self, name):
         super().__init__(name=name)
         self.pc = Signal(64)      # Program Counter (CIA, NIA)