cpu/picorv32: adapt to current version, some cleanup

litex/soc/cores/cpu/picorv32/core.py

@@ -22,7 +22,9 @@ class PicoRV32(Module):
         mem_rdata = Signal(32)
 
         self.specials += Instance("picorv32",
+            # parameters
             p_ENABLE_COUNTERS=1,
+            p_ENABLE_COUNTERS64=1,
             p_ENABLE_REGS_16_31=1,
             p_ENABLE_REGS_DUALPORT=1,
             p_LATCHED_MEM_RDATA=0,
@@ -33,17 +35,25 @@ class PicoRV32(Module):
             p_CATCH_ILLINSN=1,
             p_ENABLE_PCPI=0,
             p_ENABLE_MUL=0,
+            p_ENABLE_FAST_MUL=0,
             p_ENABLE_IRQ=0,
             p_ENABLE_IRQ_QREGS=1,
             p_ENABLE_IRQ_TIMER=1,
+            p_ENABLE_TRACE=0,
             p_MASKED_IRQ=0x00000000,
             p_LATCHED_IRQ=0xffffffff,
             p_PROGADDR_RESET=progaddr_reset,
             p_PROGADDR_IRQ=0x00000010,
+            p_STACKADDR=0xffffffff,
 
+            # clock / reset
             i_clk=ClockSignal(),
             i_resetn=~ResetSignal(),
 
+            # trap
+            o_trap=Signal(), # not used
+
+            # memory interface
             o_mem_valid=mem_valid,
             o_mem_instr=mem_instr,
             i_mem_ready=mem_ready,
@@ -53,25 +63,28 @@ class PicoRV32(Module):
             o_mem_wstrb=mem_wstrb,
             i_mem_rdata=mem_rdata,
 
-            o_mem_la_read=Signal(),    # Not used
-            o_mem_la_write=Signal(),   # Not used
-            o_mem_la_addr=Signal(32),  # Not used
-            o_mem_la_wdata=Signal(32), # Not used
-            o_mem_la_wstrb=Signal(4),  # Not used
+            # look ahead interface (not used)
+            o_mem_la_read=Signal(),
+            o_mem_la_write=Signal(),
+            o_mem_la_addr=Signal(32),
+            o_mem_la_wdata=Signal(32),
+            o_mem_la_wstrb=Signal(4),
 
-            o_pcpi_valid=Signal(),   # Not used
-            o_pcpi_insn=Signal(32),  # Not used
-            o_pcpi_rs1=Signal(32),   # Not used
-            o_pcpi_rs2=Signal(32),   # Not used
+            # co-processor interface (not used)
+            o_pcpi_valid=Signal(),
+            o_pcpi_insn=Signal(32),
+            o_pcpi_rs1=Signal(32),
+            o_pcpi_rs2=Signal(32),
             i_pcpi_wr=0,
             i_pcpi_rd=0,
             i_pcpi_wait=0,
             i_pcpi_ready=0,
 
+            # irq interface
             i_irq=self.interrupt,
-            o_eoi=Signal(32)) # Not used
+            o_eoi=Signal(32)) # not used
 
-        # adapt mem interface to wishbone
+        # adapt memory interface to wishbone
         self.comb += [
              # instruction
              i.adr.eq(mem_addr[2:]),