cores/cpu: add external cpu_type.

[litex.git] / litex / soc / cores / cpu / __init__.py

diff --git a/litex/soc/cores/cpu/__init__.py b/litex/soc/cores/cpu/__init__.py
index 4d0a04636f750a4deb5136a19eff6b12a43ed28b..8c88922b8299a07534969904c118ed70e8f7e20a 100644 (file)
--- a/litex/soc/cores/cpu/__init__.py
+++ b/litex/soc/cores/cpu/__init__.py
@@ -85,6 +85,9 @@ CPUS = {
     # None
     "None"        : CPUNone,
 
+    # External (CPU class provided externally by design/user)
+    "external"    : None,
+
     # LM32
     "lm32"        : LM32,