reduce sdram pins to smaller address and only 1 cs_n

[soc.git] / src / soc / litex / sim.py

diff --git a/src/soc/litex/sim.py b/src/soc/litex/sim.py
index 3c3dcbae0ae27c13f08b3c7eb95c608752692790..a993535370ae67c31472b4f2f28feaba7fd70015 100644 (file)
--- a/src/soc/litex/sim.py
+++ b/src/soc/litex/sim.py
@@ -17,7 +17,7 @@ from litex.soc.integration.soc_core import SoCCore
 from litex.soc.integration.common import get_mem_data
 from litex.soc.integration.builder import Builder
 
-from litedram.modules import MT41K128M16
+from litedram.modules import IS42S16160, MT41K128M16
 from litedram.phy.model import SDRAMPHYModel
 from litedram.core.controller import ControllerSettings
 
@@ -68,6 +68,7 @@ class SoCSMP(SoCCore):
             cpu_type                 = "microwatt", # XXX use microwatt
             cpu_variant              = cpu_variant,
             cpu_cls                  = LibreSOC,
+            bus_data_width           = 32, # XXX TODO 64 bit wishbone data bus
             uart_name                = "sim",
             integrated_rom_size      = 0x8000,
             integrated_main_ram_size = 0x00000000)
@@ -79,24 +80,28 @@ class SoCSMP(SoCCore):
         self.submodules.crg = CRG(platform.request("sys_clk"))
 
         # SDRAM ----------------------------------------------------------
-        phy_settings = get_sdram_phy_settings(
-            memtype    = "DDR3",
-            data_width = 16,
-            clk_freq   = 100e6)
-        self.submodules.sdrphy = SDRAMPHYModel(
-            module    = MT41K128M16(100e6, "1:4"),
-            settings  = phy_settings,
-            clk_freq  = 100e6,
-            init      = sdram_init)
-        self.add_sdram("sdram",
-            phy                     = self.sdrphy,
-            module                  = MT41K128M16(100e6, "1:4"),
-            origin                  = self.mem_map["main_ram"],
-            controller_settings     = ControllerSettings(
-                cmd_buffer_buffered = False,
-                with_auto_precharge = True
+        if False:
+            phy_settings = get_sdram_phy_settings(
+                #memtype    = "DDR3",
+                memtype    = "SDR",
+                data_width = 16,
+                clk_freq   = 100e6)
+            self.submodules.sdrphy = SDRAMPHYModel(
+                #module    = MT41K128M16(100e6, "1:4"),
+                module                  = IS42S16160(100e6, "1:4"),
+                settings  = phy_settings,
+                clk_freq  = 100e6,
+                init      = sdram_init)
+            self.add_sdram("sdram",
+                phy                     = self.sdrphy,
+                #module                  = MT41K128M16(100e6, "1:4"),
+                module                  = IS42S16160(100e6, "1:4"),
+                origin                  = self.mem_map["main_ram"],
+                #controller_settings     = ControllerSettings(
+                #    cmd_buffer_buffered = False,
+                #    with_auto_precharge = True
+                #)
             )
-        )
         if init_memories:
             addr = 0x40f00000
             self.add_constant("MEMTEST_BUS_SIZE",  0) # Skip test if memory is
@@ -104,9 +109,9 @@ class SoCSMP(SoCCore):
             self.add_constant("MEMTEST_DATA_SIZE", 0) # corrumpting the content.
             self.add_constant("ROM_BOOT_ADDRESS", addr) # Jump to fw_jump.bin
         else:
-            self.add_constant("MEMTEST_BUS_SIZE",  4096)
-            self.add_constant("MEMTEST_ADDR_SIZE", 4096)
-            self.add_constant("MEMTEST_DATA_SIZE", 4096)
+            self.add_constant("MEMTEST_BUS_SIZE",  4096//64)
+            self.add_constant("MEMTEST_ADDR_SIZE", 4096//256)
+            self.add_constant("MEMTEST_DATA_SIZE", 4096//32)
 
         # SDCard -----------------------------------------------------
         if with_sdcard:
@@ -149,7 +154,7 @@ def main():
             trace       = args.trace,
             trace_start = int(args.trace_start),
             trace_end   = int(args.trace_end),
-            trace_fst   = 1)
+            trace_fst   = 0)
         os.chdir("../")
         #if not to_run:
         #  os.system("./json2dts.py build/sim/csr.json > build/sim/dts") # FIXME