add microwatt SYSCON peripheral at 0xc000_0000

this is for (Sys)tem (Con)figuration info

diff --git a/src/ls2.py b/src/ls2.py
index 9482112954167e9371f463638ddcc312d152369c..49fc7318ff84a8ac2e156db5ae12ec25e1773716 100644 (file)
--- a/src/ls2.py
+++ b/src/ls2.py
@@ -24,6 +24,7 @@ from lambdasoc.soc.base import SoC
 from soc.bus.uart_16550 import UART16550 # opencores 16550 uart
 from soc.bus.external_core import ExternalCore # external libresoc/microwatt
 from soc.bus.wb_downconvert import WishboneDownConvert
+from soc.bus.syscon import MicrowattSYSCON
 
 from gram.core import gramCore
 from gram.phy.ecp5ddrphy import ECP5DDRPHY
@@ -90,9 +91,14 @@ class DDR3SoC(SoC, Elaboratable):
             self.bootmem.init = bios
             self._decoder.add(self.bootmem.bus, addr=fw_addr) # ROM at fw_addr
 
+        # System Configuration info
+        self.syscon = MicrowattSYSCON(sys_clk_freq=clk_freq,
+                                      has_uart=(uart_pins is not None))
+        self._decoder.add(self.syscon.bus, addr=0xc000000) # at 0xc000_0000
+
         # SRAM (read-writeable BRAM)
         self.ram = SRAMPeripheral(size=4096)
-        self._decoder.add(self.ram.bus, addr=0x8000000) # SRAM at 0x8000_000
+        self._decoder.add(self.ram.bus, addr=0x8000000) # SRAM at 0x8000_0000
 
         # UART
         if uart_pins is not None:
@@ -136,6 +142,7 @@ class DDR3SoC(SoC, Elaboratable):
 
         if hasattr(self, "bootmem"):
             m.submodules.bootmem = self.bootmem
+        m.submodules.syscon = self.syscon
         m.submodules.ram = self.ram
         m.submodules.uart = self.uart
         m.submodules.arbiter = self._arbiter