Allow all memory regions to be used as IO with CPUNone

diff --git a/litex/soc/cores/cpu/__init__.py b/litex/soc/cores/cpu/__init__.py
index 1503dfff09ff2e01bae6a3f0a712904eaa2e6e7c..272007d0ba23180fd9ae0da78a8837f25ec6c274 100644 (file)
--- a/litex/soc/cores/cpu/__init__.py
+++ b/litex/soc/cores/cpu/__init__.py
@@ -22,7 +22,7 @@ class CPU(Module):
 class CPUNone(CPU):
     data_width           = 32
     reset_address        = 0x00000000
-    io_regions           = {0x00000000: 0xf0000000} # origin, length
+    io_regions           = {0x00000000: 0x1_0000_0000} # origin, length
 
 # CPUS ---------------------------------------------------------------------------------------------