soc/cores/cpu/eos_s3: add interrupt support

Signed-off-by: Gwenhael Goavec-Merou <gwenhael.goavec-merou@trabucayre.com>

litex/soc/cores/cpu/eos_s3/core.py

@@ -36,6 +36,7 @@ class EOS_S3(CPU):
     def __init__(self, platform, variant):
         self.platform       = platform
         self.reset          = Signal()
+        self.interrupt      = Signal(4)
         self.periph_buses   = [] # Peripheral buses (Connected to main SoC's bus).
         self.memory_buses   = [] # Memory buses (Connected directly to LiteDRAM).
 
@@ -72,7 +73,7 @@ class EOS_S3(CPU):
             #SDMA_Done(),
             #SDMA_Active(),
             # FB Interrupts
-            #FB_msg_out(4'b0000),
+            i_FB_msg_out     = self.interrupt,
             #FB_Int_Clr(8'h0),
             #FB_Start(),
             #FB_Busy= 0,

litex/soc/integration/soc.py

@@ -926,6 +926,11 @@ class SoC(Module):
         # Add Bus Masters/CSR/IRQs.
         if isinstance(self.cpu, cpu.EOS_S3):
             self.bus.add_master(master=self.cpu.wb)
+            if hasattr(self.cpu, "interrupt"):
+                self.irq.enable()
+                for name, loc in self.cpu.interrupts.items():
+                    self.irq.add(name, loc)
+                self.add_config("CPU_HAS_INTERRUPT")
         if not isinstance(self.cpu, (cpu.CPUNone, cpu.Zynq7000, cpu.EOS_S3)):
             if reset_address is None:
                 reset_address = self.mem_map["rom"]