Merge pull request #737 from stffrdhrn/or1k-linux-insns

mor1kx: Enable rotate, fpu and sign extensions under linux

litex/soc/cores/cpu/mor1kx/core.py

@@ -15,7 +15,7 @@
 from litex.soc.interconnect import wishbone
 from litex.soc.cores.cpu import CPU
 
-CPU_VARIANTS = ["standard", "linux"]
+CPU_VARIANTS = ["standard", "standard+fpu", "linux", "linux+fpu"]
 
 
 class MOR1KX(CPU):
@@ -50,7 +50,13 @@ def gcc_triple(self):
     def gcc_flags(self):
         flags =  "-mhard-mul "
         flags += "-mhard-div "
+        flags += "-mcmov "
         flags += "-D__mor1kx__ "
+
+        if "linux" in self.variant:
+            flags += "-mror "
+            flags += "-msext "
+
         return flags
 
     @property
@@ -77,7 +83,7 @@ def __init__(self, platform, variant="standard"):
         self.memory_buses = []
 
 
-        if variant == "linux":
+        if "linux" in variant:
             self.mem_map = self.mem_map_linux
 
         # # #
@@ -107,14 +113,21 @@ def __init__(self, platform, variant="standard"):
             p_DBUS_WB_TYPE              = "B3_REGISTERED_FEEDBACK",
         )
 
-        if variant == "linux":
+        if "fpu" in variant:
+            cpu_args.update(
+                p_FEATURE_FPU = "ENABLED",
+            )
+
+        if "linux" in variant:
             cpu_args.update(
                 # Linux needs the memory management units.
                 p_FEATURE_IMMU  = "ENABLED",
                 p_FEATURE_DMMU  = "ENABLED",
                 # FIXME: Currently we need the or1k timer when we should be
                 # using the litex timer.
                 p_FEATURE_TIMER = "ENABLED",
+                p_FEATURE_ROR = "ENABLED",
+                p_FEATURE_EXT = "ENABLED",
             )
             # FIXME: Check if these are needed?
             use_defaults = (