Merge pull request #1817 from enjoy-digital/wishbone_word_byte_addressing

Add wishbone word/byte addressing.

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

@@ -91,7 +91,7 @@ class BlackParrot(CPU):
         self.platform     = platform
         self.variant      = variant
         self.reset        = Signal()
-        self.idbus        = idbus = wishbone.Interface(data_width=64, adr_width=37)
+        self.idbus        = idbus = wishbone.Interface(data_width=64, adr_width=37, addressing="word")
         self.periph_buses = [idbus]
         self.memory_buses = []
 

litex/soc/cores/cpu/cortex_m1/core.py

@@ -64,7 +64,7 @@ class CortexM1(CPU):
         self.cpu_params = dict(
             # Clk/Rst.
             i_HCLK      = ClockSignal("sys"),
-            i_SYSRESETn = ~(ResetSignal() | self.reset),
+            i_SYSRESETn = ~(ResetSignal("sys") | self.reset),
 
             # Control/Status.
             o_LOCKUP      = Open(),
@@ -85,7 +85,7 @@ class CortexM1(CPU):
             # Debug.
             p_SMALL_DEBUG  = True,
             i_DBGRESTART   = 0,
-            i_DBGRESETn    = ~(ResetSignal() | self.reset),
+            i_DBGRESETn    = ~(ResetSignal("sys") | self.reset),
             p_DEBUG_SEL    = 1, # JTAG
             o_DBGRESTARTED = Open(),
 

litex/soc/cores/cpu/cortex_m3/core.py

@@ -65,7 +65,7 @@ class CortexM3(CPU):
         self.cpu_params = dict(
             # Clk/Rst.
             i_HCLK      = ClockSignal("sys"),
-            i_SYSRESETn = ~(ResetSignal() | self.reset),
+            i_SYSRESETn = ~(ResetSignal("sys") | self.reset),
 
             # Control/Status.
             p_MPU_PRESENT = 0,
@@ -82,7 +82,7 @@ class CortexM3(CPU):
             i_CFGITCMEN = 0,  # 1 = alias ITCM at 0x0
 
             # Debug.
-            i_DBGRESETn = ~(ResetSignal() | self.reset),
+            i_DBGRESETn = ~(ResetSignal("sys") | self.reset),
 
             # Instruction Bus (AXI).
             o_AWVALIDC = ibus.aw.valid,

litex/soc/cores/cpu/cv32e40p/core.py

@@ -232,7 +232,7 @@ class TraceCollector(LiteXModule):
 
 class TraceDebugger(LiteXModule):
     def __init__(self):
-        self.bus      = wishbone.Interface()
+        self.bus      = wishbone.Interface(data_width=32, address_width=32, addressing="word")
         self.source   = source   = stream.Endpoint([("data", 32)])
         self.trace_if = trace_if = Record(trace_layout)
 
@@ -292,8 +292,8 @@ class DebugModule(LiteXModule):
         if pads is None:
             pads = Record(self.jtag_layout)
         self.pads = pads
-        self.dmbus = wishbone.Interface()
-        self.sbbus = wishbone.Interface()
+        self.dmbus = wishbone.Interface(data_width=32, address_width=32, addressing="word")
+        self.sbbus = wishbone.Interface(data_width=32, address_width=32, addressing="word")
         dmbus = Record(obi_layout)
         sbbus = Record(obi_layout)
 
@@ -382,8 +382,8 @@ class CV32E40P(CPU):
         self.platform     = platform
         self.variant      = variant
         self.reset        = Signal()
-        self.ibus         = wishbone.Interface()
-        self.dbus         = wishbone.Interface()
+        self.ibus         = wishbone.Interface(data_width=32, address_width=32, addressing="word")
+        self.dbus         = wishbone.Interface(data_width=32, address_width=32, addressing="word")
         self.periph_buses = [self.ibus, self.dbus]
         self.memory_buses = []
         self.interrupt    = Signal(15)
@@ -458,7 +458,7 @@ class CV32E40P(CPU):
 
     def add_debug_module(self, dm):
         self.cpu_params.update(i_debug_req_i=dm.debug_req)
-        self.cpu_params.update(i_rst_ni=~(ResetSignal() | dm.ndmreset))
+        self.cpu_params.update(i_rst_ni=~(ResetSignal("sys") | dm.ndmreset))
 
     def add_trace_core(self, trace):
         trace_if = trace.trace_if

litex/soc/cores/cpu/cv32e41p/core.py

@@ -183,8 +183,8 @@ class DebugModule(Module):
         if pads is None:
             pads = Record(self.jtag_layout)
         self.pads = pads
-        self.dmbus = wishbone.Interface()
-        self.sbbus = wishbone.Interface()
+        self.dmbus = wishbone.Interface(data_width=32, address_width=32, addressing="word")
+        self.sbbus = wishbone.Interface(data_width=32, address_width=32, addressing="word")
         dmbus = Record(obi_layout)
         sbbus = Record(obi_layout)
 
@@ -267,8 +267,8 @@ class CV32E41P(CPU):
         self.platform          = platform
         self.variant           = variant
         self.reset             = Signal()
-        self.ibus              = wishbone.Interface()
-        self.dbus              = wishbone.Interface()
+        self.ibus              = wishbone.Interface(data_width=32, address_width=32, addressing="word")
+        self.dbus              = wishbone.Interface(data_width=32, address_width=32, addressing="word")
         self.periph_buses      = [self.ibus, self.dbus]
         self.memory_buses      = []
         self.interrupt         = Signal(16)
@@ -321,7 +321,7 @@ class CV32E41P(CPU):
             i_apu_rvalid_i = 0,
 
             # IRQ.
-            i_irq_i          = Cat(self.interrupt_padding,self.interrupt),
+            i_irq_i          = Cat(self.interrupt_padding, self.interrupt),
 
             # Debug.
             i_debug_req_i    = 0,
@@ -335,7 +335,7 @@ class CV32E41P(CPU):
 
     def add_debug_module(self, dm):
         self.cpu_params.update(i_debug_req_i=dm.debug_req)
-        self.cpu_params.update(i_rst_ni=~(ResetSignal() | dm.ndmreset))
+        self.cpu_params.update(i_rst_ni=~(ResetSignal("sys") | dm.ndmreset))
 
     def set_reset_address(self, reset_address):
         self.reset_address = reset_address

litex/soc/cores/cpu/cva5/core.py

@@ -85,8 +85,8 @@ class CVA5(CPU):
         if variant == "minimal":
             # Minimal variant has no caches, no multiply or divide support, and no branch predictor.
             # It also uses separate fetch and load-store wishbone interfaces.
-            self.ibus = ibus = wishbone.Interface()
-            self.dbus = dbus = wishbone.Interface()
+            self.ibus = ibus = wishbone.Interface(data_width=32, address_width=32, addressing="word")
+            self.dbus = dbus = wishbone.Interface(data_width=32, address_width=32, addressing="word")
             self.periph_buses.append(ibus)
             self.periph_buses.append(dbus)
             self.cpu_params.update(
@@ -117,7 +117,7 @@ class CVA5(CPU):
         if variant == "standard":
             # Standard variant includes instruction and data caches, multiply and divide support
             # along with the branch predictor. It uses a shared wishbone interface.
-            self.idbus = idbus = wishbone.Interface()
+            self.idbus = idbus = wishbone.Interface(data_width=32, address_width=32, addressing="word")
             self.periph_buses.append(idbus)
             self.cpu_params.update(
                 o_idbus_adr   = idbus.adr,

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

@@ -47,7 +47,7 @@ class EOS_S3(CPU):
         self.platform       = platform
         self.reset          = Signal()
         self.interrupt      = Signal(4)
-        self.pbus           = wishbone.Interface(data_width=32, adr_width=15)
+        self.pbus           = wishbone.Interface(data_width=32, adr_width=15, addressing="byte")
         self.periph_buses   = [self.pbus]
         self.memory_buses   = []
 
@@ -84,7 +84,7 @@ class EOS_S3(CPU):
             # -----------
             i_WB_CLK       = ClockSignal("eos_s3_0"),
             o_WB_RST       = pbus_rst,
-            o_WBs_ADR      = Cat(Signal(2), self.pbus.adr),
+            o_WBs_ADR      = self.pbus.adr,
             o_WBs_CYC      = self.pbus.cyc,
             o_WBs_BYTE_STB = self.pbus.sel,
             o_WBs_WE       = self.pbus.we,

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

@@ -71,7 +71,7 @@ class FemtoRV(CPU):
         self.variant      = variant
         self.human_name   = f"FemtoRV-{variant.upper()}"
         self.reset        = Signal()
-        self.idbus        = idbus = wishbone.Interface()
+        self.idbus        = idbus = wishbone.Interface(data_width=32, address_width=32, addressing="byte")
         self.periph_buses = [idbus] # Peripheral buses (Connected to main SoC's bus).
         self.memory_buses = []      # Memory buses (Connected directly to LiteDRAM).
 
@@ -119,7 +119,7 @@ class FemtoRV(CPU):
         self.fsm = fsm = FSM(reset_state="WAIT")
         fsm.act("WAIT",
             # Latch Address + Bytes to Words conversion.
-            NextValue(idbus.adr, mbus.addr[2:]),
+            NextValue(idbus.adr, mbus.addr),
 
             # Latch Wdata/WMask.
             NextValue(idbus.dat_w, mbus.wdata),

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

@@ -59,7 +59,7 @@ class FireV(CPU):
         self.variant      = variant
         self.human_name   = f"FireV-{variant.upper()}"
         self.reset        = Signal()
-        self.idbus        = idbus = wishbone.Interface()
+        self.idbus        = idbus = wishbone.Interface(data_width=32, address_width=32, addressing="byte")
         self.periph_buses = [idbus] # Peripheral buses (Connected to main SoC's bus).
         self.memory_buses = []      # Memory buses (Connected directly to LiteDRAM).
 
@@ -115,7 +115,7 @@ class FireV(CPU):
         )
         self.comb += [
             idbus.we.eq(mbus.out_ram_rw),
-            idbus.adr.eq(mbus.out_ram_addr[2:]),
+            idbus.adr.eq(mbus.out_ram_addr),
             idbus.sel.eq(mbus.out_ram_wmask),
             idbus.dat_w.eq(mbus.out_ram_data_in),
 

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

@@ -168,7 +168,7 @@ class GowinEMCU(CPU):
 
         # Extension AHB -> Wishbone CSR via bridge
 
-        self.pbus = wishbone.Interface(data_width=32, adr_width=30)
+        self.pbus = wishbone.Interface(data_width=32, adr_width=30, addressing="word")
         self.periph_buses = [self.pbus]
         ahb_targexp0 = ahb.Interface()
         for s, _ in ahb_targexp0.master_signals:

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

@@ -57,7 +57,7 @@ class OBI2Wishbone(Module):
             # On OBI request:
             If(obi.req,
                 # Drive Wishbone bus from OBI bus.
-                wb.adr.eq(obi.addr[2:32]),
+                wb.adr.eq(     obi.addr),
                 wb.stb.eq(            1),
                 wb.dat_w.eq(  obi.wdata),
                 wb.cyc.eq(            1),
@@ -77,7 +77,7 @@ class OBI2Wishbone(Module):
         )
         fsm.act("ACK",
             # Drive Wishbone bus from stored OBI bus values.
-            wb.adr.eq(addr[2:32]),
+            wb.adr.eq(      addr),
             wb.stb.eq(         1),
             wb.dat_w.eq(   wdata),
             wb.cyc.eq(         1),
@@ -121,8 +121,8 @@ class Ibex(CPU):
         self.platform     = platform
         self.variant      = variant
         self.reset        = Signal()
-        self.ibus         = wishbone.Interface()
-        self.dbus         = wishbone.Interface()
+        self.ibus         = wishbone.Interface(data_width=32, address_width=32, addressing="byte")
+        self.dbus         = wishbone.Interface(data_width=32, address_width=32, addressing="byte")
         self.periph_buses = [self.ibus, self.dbus]
         self.memory_buses = []
         self.interrupt    = Signal(15)

litex/soc/cores/cpu/lm32/core.py

@@ -51,8 +51,8 @@ class LM32(CPU):
         self.platform     = platform
         self.variant      = variant
         self.reset        = Signal()
-        self.ibus         = ibus = wishbone.Interface()
-        self.dbus         = dbus = wishbone.Interface()
+        self.ibus         = ibus = wishbone.Interface(data_width=32, address_width=32, addressing="byte")
+        self.dbus         = dbus = wishbone.Interface(data_width=32, address_width=32, addressing="byte")
         self.interrupt    = Signal(32)
         self.periph_buses = [ibus, dbus] # Peripheral buses (Connected to main SoC's bus).
         self.memory_buses = []           # Memory buses (Connected directly to LiteDRAM).
@@ -68,7 +68,7 @@ class LM32(CPU):
             i_interrupt=self.interrupt,
 
             # IBus.
-            o_I_ADR_O = Cat(Signal(2), ibus.adr),
+            o_I_ADR_O = ibus.adr,
             o_I_DAT_O = ibus.dat_w,
             o_I_SEL_O = ibus.sel,
             o_I_CYC_O = ibus.cyc,
@@ -82,7 +82,7 @@ class LM32(CPU):
             i_I_RTY_I = 0,
 
             # DBus.
-            o_D_ADR_O = Cat(Signal(2), dbus.adr),
+            o_D_ADR_O = dbus.adr,
             o_D_DAT_O = dbus.dat_w,
             o_D_SEL_O = dbus.sel,
             o_D_CYC_O = dbus.cyc,

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

@@ -84,8 +84,8 @@ class Marocchino(CPU):
         self.variant      = variant
         self.reset        = Signal()
         self.interrupt    = Signal(32)
-        self.ibus         = ibus = wishbone.Interface()
-        self.dbus         = dbus = wishbone.Interface()
+        self.ibus         = ibus = wishbone.Interface(data_width=32, address_width=32, addressing="byte")
+        self.dbus         = dbus = wishbone.Interface(data_width=32, address_width=32, addressing="byte")
         self.periph_buses = [ibus, dbus] # Peripheral buses (Connected to main SoC's bus).
         self.memory_buses = []           # Memory buses (Connected directly to LiteDRAM).
 
@@ -117,13 +117,13 @@ class Marocchino(CPU):
             **cpu_args,
 
             # Clk / Rst.
-            i_wb_clk = ClockSignal("sys"),
-            i_wb_rst = ResetSignal("sys") | self.reset,
+            i_wb_clk  = ClockSignal("sys"),
+            i_wb_rst  = ResetSignal("sys") | self.reset,
             i_cpu_clk = ClockSignal("sys"),
             i_cpu_rst = ResetSignal("sys") | self.reset,
 
             # IBus.
-            o_iwbm_adr_o = Cat(Signal(2), ibus.adr),
+            o_iwbm_adr_o = ibus.adr,
             o_iwbm_stb_o = ibus.stb,
             o_iwbm_cyc_o = ibus.cyc,
             o_iwbm_sel_o = ibus.sel,
@@ -137,7 +137,7 @@ class Marocchino(CPU):
             i_iwbm_rty_i = 0,
 
             # DBus.
-            o_dwbm_adr_o = Cat(Signal(2), dbus.adr),
+            o_dwbm_adr_o = dbus.adr,
             o_dwbm_stb_o = dbus.stb,
             o_dwbm_cyc_o = dbus.cyc,
             o_dwbm_sel_o = dbus.sel,

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

@@ -71,8 +71,8 @@ class Microwatt(CPU):
         self.platform     = platform
         self.variant      = variant
         self.reset        = Signal()
-        self.ibus         = ibus = wishbone.Interface(data_width=64, adr_width=29)
-        self.dbus         = dbus = wishbone.Interface(data_width=64, adr_width=29)
+        self.ibus         = ibus = wishbone.Interface(data_width=64, adr_width=29, addressing="word")
+        self.dbus         = dbus = wishbone.Interface(data_width=64, adr_width=29, addressing="word")
         self.periph_buses = [ibus, dbus] # Peripheral buses (Connected to main SoC's bus).
         self.memory_buses = []           # Memory buses (Connected directly to LiteDRAM).
         if "irq" in variant:
@@ -240,8 +240,8 @@ class XICSSlave(Module, AutoCSR):
     def __init__(self, platform, core_irq_out=Signal(), int_level_in=Signal(16), variant="standard"):
         self.variant = variant
 
-        self.icp_bus = icp_bus = wishbone.Interface(data_width=32, adr_width=12)
-        self.ics_bus = ics_bus = wishbone.Interface(data_width=32, adr_width=12)
+        self.icp_bus = icp_bus = wishbone.Interface(data_width=32, adr_width=12, addressing="word")
+        self.ics_bus = ics_bus = wishbone.Interface(data_width=32, adr_width=12, addressing="word")
 
         # XICS Signals.
         self.ics_icp_xfer_src = Signal(4)

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

@@ -48,8 +48,8 @@ class Minerva(CPU):
         self.variant      = variant
         self.reset        = Signal()
         self.interrupt    = Signal(32)
-        self.ibus         = ibus = wishbone.Interface()
-        self.dbus         = dbus = wishbone.Interface()
+        self.ibus         = ibus = wishbone.Interface(data_width=32, address_width=32, addressing="word")
+        self.dbus         = dbus = wishbone.Interface(data_width=32, address_width=32, addressing="word")
         self.periph_buses = [self.ibus, self.dbus] # Peripheral buses (Connected to main SoC's bus).
         self.memory_buses = []                     # Memory buses (Connected directly to LiteDRAM).
 

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

@@ -84,8 +84,8 @@ class MOR1KX(CPU):
         self.variant      = variant
         self.reset        = Signal()
         self.interrupt    = Signal(32)
-        self.ibus         = ibus = wishbone.Interface()
-        self.dbus         = dbus = wishbone.Interface()
+        self.ibus         = ibus = wishbone.Interface(data_width=32, address_width=32, addressing="byte")
+        self.dbus         = dbus = wishbone.Interface(data_width=32, address_width=32, addressing="byte")
         self.periph_buses = [ibus, dbus] # Peripheral buses (Connected to main SoC's bus).
         self.memory_buses = []           # Memory buses (Connected directly to LiteDRAM).
 
@@ -160,7 +160,7 @@ class MOR1KX(CPU):
             i_irq_i=self.interrupt,
 
             # IBus.
-            o_iwbm_adr_o = Cat(Signal(2), ibus.adr),
+            o_iwbm_adr_o = ibus.adr,
             o_iwbm_dat_o = ibus.dat_w,
             o_iwbm_sel_o = ibus.sel,
             o_iwbm_cyc_o = ibus.cyc,
@@ -174,7 +174,7 @@ class MOR1KX(CPU):
             i_iwbm_rty_i = 0,
 
             # DBus.
-            o_dwbm_adr_o = Cat(Signal(2), dbus.adr),
+            o_dwbm_adr_o = dbus.adr,
             o_dwbm_dat_o = dbus.dat_w,
             o_dwbm_sel_o = dbus.sel,
             o_dwbm_cyc_o = dbus.cyc,

litex/soc/cores/cpu/neorv32/core.py

@@ -75,7 +75,7 @@ class NEORV32(CPU):
         self.variant      = variant
         self.human_name   = f"NEORV32-{variant}"
         self.reset        = Signal()
-        self.ibus         = idbus = wishbone.Interface()
+        self.ibus         = idbus = wishbone.Interface(data_width=32, address_width=32, addressing="byte")
         self.periph_buses = [idbus] # Peripheral buses (Connected to main SoC's bus).
         self.memory_buses = []      # Memory buses (Connected directly to LiteDRAM).
 
@@ -98,7 +98,7 @@ class NEORV32(CPU):
             i_mext_irq_i  = 0,
 
             # I/D Wishbone Bus.
-            o_wb_adr_o = Cat(Signal(2), idbus.adr),
+            o_wb_adr_o = idbus.adr,
             i_wb_dat_i = idbus.dat_r,
             o_wb_dat_o = idbus.dat_w,
             o_wb_we_o  = idbus.we,

litex/soc/cores/cpu/openc906/core.py

@@ -117,8 +117,11 @@ class OpenC906(CPU):
         # Peripheral bus (Connected to main SoC's bus).
         self.axi_if = axi_if = axi.AXIInterface(data_width=128, address_width=40, id_width=8)
         if convert_periph_bus_to_wishbone:
-            self.wb_if = wishbone.Interface(data_width=axi_if.data_width,
-                                            adr_width=axi_if.address_width - log2_int(axi_if.data_width // 8))
+            self.wb_if = wishbone.Interface(
+                data_width = axi_if.data_width,
+                adr_width  = axi_if.address_width - log2_int(axi_if.data_width // 8),
+                addressing = "word",
+            )
             self.submodules += axi.AXI2Wishbone(axi_if, self.wb_if)
             self.periph_buses = [self.wb_if]
         else:
@@ -206,7 +209,7 @@ class OpenC906(CPU):
             add_manifest_sources(platform, "gen_rtl/filelists/generic_fpga.fl")
 
     def add_debug(self):
-        self.debug_bus = wishbone.Interface()
+        self.debug_bus = wishbone.Interface(data_width=32, address_width=32, addressing="word")
         debug_apb = Record(apb_layout)
 
         self.submodules += Wishbone2APB(self.debug_bus, debug_apb)

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

@@ -74,7 +74,7 @@ class PicoRV32(CPU):
         self.trap         = Signal()
         self.reset        = Signal()
         self.interrupt    = Signal(32)
-        self.idbus        = idbus = wishbone.Interface()
+        self.idbus        = idbus = wishbone.Interface(data_width=32, address_width=32, addressing="byte")
         self.periph_buses = [idbus] # Peripheral buses (Connected to main SoC's bus).
         self.memory_buses = []      # Memory buses (Connected directly to LiteDRAM).
 
@@ -166,7 +166,7 @@ class PicoRV32(CPU):
 
         # Adapt Memory Interface to Wishbone.
         self.comb += [
-            idbus.adr.eq(mem_addr[2:]),
+            idbus.adr.eq(mem_addr),
             idbus.dat_w.eq(mem_wdata),
             idbus.we.eq(mem_wstrb != 0),
             idbus.sel.eq(mem_wstrb),

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

@@ -130,8 +130,8 @@ class Rocket(CPU):
         self.mmio_axi  = mmio_axi = axi.AXIInterface(data_width=mmio_dw, address_width=32, id_width=4)
         self.l2fb_axi  = l2fb_axi = axi.AXIInterface(data_width=mmio_dw, address_width=32, id_width=4)
 
-        self.mmio_wb   = mmio_wb = wishbone.Interface(data_width=mmio_dw, adr_width=32-log2_int(mmio_dw//8))
-        self.l2fb_wb   = l2fb_wb = wishbone.Interface(data_width=mmio_dw, adr_width=32-log2_int(mmio_dw//8))
+        self.mmio_wb   = mmio_wb = wishbone.Interface(data_width=mmio_dw, adr_width=32-log2_int(mmio_dw//8), addressing="word")
+        self.l2fb_wb   = l2fb_wb = wishbone.Interface(data_width=mmio_dw, adr_width=32-log2_int(mmio_dw//8), addressing="word")
 
         self.memory_buses = [mem_axi] # Peripheral buses (Connected to main SoC's bus).
         self.periph_buses = [mmio_wb] # Memory buses (Connected directly to LiteDRAM).

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

@@ -59,8 +59,8 @@ class SERV(CPU):
         self.platform     = platform
         self.variant      = variant
         self.reset        = Signal()
-        self.ibus         = ibus = wishbone.Interface()
-        self.dbus         = dbus = wishbone.Interface()
+        self.ibus         = ibus = wishbone.Interface(data_width=32, address_width=32, addressing="byte")
+        self.dbus         = dbus = wishbone.Interface(data_width=32, address_width=32, addressing="byte")
         self.periph_buses = [ibus, dbus] # Peripheral buses (Connected to main SoC's bus).
         self.memory_buses = []           # Memory buses (Connected directly to LiteDRAM).
 
@@ -68,20 +68,20 @@ class SERV(CPU):
 
         self.cpu_params = dict(
             # Clk / Rst
-            i_clk   = ClockSignal(),
-            i_i_rst = ResetSignal() | self.reset,
+            i_clk   = ClockSignal("sys"),
+            i_i_rst = ResetSignal("sys") | self.reset,
 
             # Timer IRQ.
             i_i_timer_irq = 0,
 
             # Ibus.
-            o_o_ibus_adr = Cat(Signal(2), ibus.adr),
+            o_o_ibus_adr = ibus.adr,
             o_o_ibus_cyc = ibus.cyc,
             i_i_ibus_rdt = ibus.dat_r,
             i_i_ibus_ack = ibus.ack,
 
             # Dbus.
-            o_o_dbus_adr = Cat(Signal(2), dbus.adr),
+            o_o_dbus_adr = dbus.adr,
             o_o_dbus_dat = dbus.dat_w,
             o_o_dbus_sel = dbus.sel,
             o_o_dbus_we  = dbus.we,

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

@@ -140,8 +140,8 @@ class VexRiscv(CPU, AutoCSR):
         self.external_variant = None
         self.reset            = Signal()
         self.interrupt        = Signal(32)
-        self.ibus             = ibus = wishbone.Interface()
-        self.dbus             = dbus = wishbone.Interface()
+        self.ibus             = ibus = wishbone.Interface(data_width=32, address_width=32, addressing="word")
+        self.dbus             = dbus = wishbone.Interface(data_width=32, address_width=32, addressing="word")
         self.periph_buses     = [ibus, dbus] # Peripheral buses (Connected to main SoC's bus).
         self.memory_buses     = []           # Memory buses (Connected directly to LiteDRAM).
 
@@ -217,7 +217,7 @@ class VexRiscv(CPU, AutoCSR):
         self.transfer_in_progress  = Signal()
         self.transfer_wait_for_ack = Signal()
 
-        self.debug_bus = wishbone.Interface()
+        self.debug_bus = wishbone.Interface(data_width=32, address_width=32, addressing="word")
 
         self.sync += self.debug_bus.dat_r.eq(self.o_rsp_data)
         self.sync += debug_reset.eq(reset_debug_logic | ResetSignal())
@@ -268,10 +268,10 @@ class VexRiscv(CPU, AutoCSR):
         ]
 
         self.cpu_params.update(
-            i_reset = ResetSignal() | self.reset | debug_reset,
+            i_reset                         = ResetSignal("sys") | self.reset | debug_reset,
             i_iBusWishbone_ERR              = self.ibus.err | ibus_err,
             i_dBusWishbone_ERR              = self.dbus.err | dbus_err,
-            i_debugReset                    = ResetSignal(),
+            i_debugReset                    = ResetSignal("sys"),
             i_debug_bus_cmd_valid           = self.i_cmd_valid,
             i_debug_bus_cmd_payload_wr      = self.i_cmd_payload_wr,
             i_debug_bus_cmd_payload_address = self.i_cmd_payload_address,

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

@@ -312,7 +312,7 @@ class VexRiscvSMP(CPU):
             False : 32,
             # Else max of I/DCache-width.
             True  : max(VexRiscvSMP.icache_width, VexRiscvSMP.dcache_width),
-        }[VexRiscvSMP.wishbone_memory and not VexRiscvSMP.wishbone_force_32b])
+        }[VexRiscvSMP.wishbone_memory and not VexRiscvSMP.wishbone_force_32b], addressing="word")
         self.periph_buses     = [pbus] # Peripheral buses (Connected to main SoC's bus).
         self.memory_buses     = []     # Memory buses (Connected directly to LiteDRAM).
 
@@ -320,8 +320,8 @@ class VexRiscvSMP(CPU):
 
         self.cpu_params = dict(
             # Clk / Rst.
-            i_debugCd_external_clk   = ClockSignal(),
-            i_debugCd_external_reset = ResetSignal() | self.reset,
+            i_debugCd_external_clk   = ClockSignal("sys"),
+            i_debugCd_external_reset = ResetSignal("sys") | self.reset,
 
             # Interrupts.
             i_interrupts = self.interrupt,
@@ -352,7 +352,7 @@ class VexRiscvSMP(CPU):
 
         # DMA.
         if VexRiscvSMP.coherent_dma:
-            self.dma_bus = dma_bus = wishbone.Interface(data_width=VexRiscvSMP.dcache_width, address_width=32)
+            self.dma_bus = dma_bus = wishbone.Interface(data_width=VexRiscvSMP.dcache_width, address_width=32, addressing="word")
             dma_bus_stall   = Signal()
             dma_bus_inhibit = Signal()
             self.cpu_params.update(
@@ -462,7 +462,7 @@ class VexRiscvSMP(CPU):
             soc.add_config("CPU_ITLB_WAYS", VexRiscvSMP.itlb_size)
 
         # Add PLIC as Bus Slave
-        self.plicbus = plicbus  = wishbone.Interface()
+        self.plicbus = plicbus  = wishbone.Interface(data_width=32, address_width=32, addressing="word")
         self.cpu_params.update(
             i_plicWishbone_CYC       = plicbus.cyc,
             i_plicWishbone_STB       = plicbus.stb,
@@ -475,7 +475,7 @@ class VexRiscvSMP(CPU):
         soc.bus.add_slave("plic", self.plicbus, region=SoCRegion(origin=soc.mem_map.get("plic"), size=0x40_0000, cached=False))
 
         # Add CLINT as Bus Slave
-        self.clintbus = clintbus = wishbone.Interface()
+        self.clintbus = clintbus = wishbone.Interface(data_width=32, address_width=32, addressing="word")
         self.cpu_params.update(
             i_clintWishbone_CYC      = clintbus.cyc,
             i_clintWishbone_STB      = clintbus.stb,

litex/soc/integration/soc.py

@@ -151,6 +151,11 @@ class SoCBusHandler(LiteXModule):
         self.standard              = standard
         self.data_width            = data_width
         self.address_width         = address_width
+        self.addressing            = {
+            "wishbone" : "word", # FIXME: Allow selection for Wishbone.
+            "axi-lite" : "byte",
+            "axi"      : "byte",
+        }[standard]
         self.bursting              = bursting
         self.interconnect          = interconnect
         self.interconnect_register = interconnect_register
@@ -329,7 +334,8 @@ class SoCBusHandler(LiteXModule):
                 }[interface_cls]
                 adapted_interface = interface_cls(
                     data_width    = self.data_width,
-                    address_width = self.address_width
+                    address_width = self.address_width,
+                    addressing    = self.addressing,
                 )
                 if direction == "m2s":
                     master, slave = interface, adapted_interface
@@ -353,7 +359,8 @@ class SoCBusHandler(LiteXModule):
             else:
                 adapted_interface = main_bus_cls(
                     data_width    = self.data_width,
-                    address_width = self.address_width
+                    address_width = self.address_width,
+                    addressing    = self.addressing,
                 )
                 if direction == "m2s":
                     master, slave = interface, adapted_interface
@@ -372,10 +379,35 @@ class SoCBusHandler(LiteXModule):
                 self.submodules += bridge
                 return adapted_interface
 
+        # Addressing conversion helper.
+        def addressing_convert(interface, direction):
+            # Same Addressing, return un-modified interface.
+            if interface.addressing == self.addressing:
+                return interface
+            # Different Addressing: Return adapted interface.
+            else:
+                assert interface.addressing == "byte" # FIXME: Remove limitation.
+                assert      self.addressing == "word" # FIXME: Remove limitation.
+                interface_cls = type(interface)
+                adapted_interface = interface_cls(
+                    data_width    = self.data_width,
+                    address_width = self.address_width,
+                    addressing    = self.addressing,
+                )
+                address_shift = log2_int(interface.data_width//8)
+                if direction == "m2s":
+                    self.comb += interface.connect(adapted_interface)
+                    self.comb += adapted_interface.adr.eq(interface.adr[address_shift:])
+                elif direction == "s2m":
+                    self.comb += adapted_interface.connect(interface)
+                    self.comb += interface.adr.eq(adapted_interface.adr[address_shift:])
+                return adapted_interface
+
         # Interface conversion.
         adapted_interface = interface
-        adapted_interface = data_width_convert(adapted_interface, direction)
+        adapted_interface =   data_width_convert(adapted_interface, direction)
         adapted_interface = bus_standard_convert(adapted_interface, direction)
+        adapted_interface =   addressing_convert(adapted_interface, direction)
 
         if type(interface) != type(adapted_interface) or interface.data_width != adapted_interface.data_width:
             fmt = "{name} Bus {adapted} from {from_bus} {from_bits}-bit to {to_bus} {to_bits}-bit."

litex/soc/interconnect/ahb.py

@@ -28,6 +28,7 @@ class Interface(Record):
     """Sets up the AHB interface signals for master and slave."""
     adr_width      = 32
     data_width     = 32
+    addressing     = "byte"
     master_signals = [
         ("addr",     adr_width),
         ("burst",    3),
@@ -56,22 +57,25 @@ class AHB2Wishbone(LiteXModule):
     It takes as input an AHB interface and a Wishbone interface and does the conversion.
     """
     def __init__(self, ahb, wishbone):
-        wishbone_adr_shift = log2_int(ahb.data_width // 8)
+        # Parameters/Checks.
+        wishbone_adr_shift = {
+            "word" : log2_int(ahb.data_width//8),
+            "byte" : 0
+        }[wishbone.addressing]
         assert ahb.data_width == wishbone.data_width
-        assert ahb.adr_width == wishbone.adr_width + wishbone_adr_shift
-
-        self.comb += ahb.resp.eq(wishbone.err)
+        assert ahb.adr_width  == wishbone.adr_width + wishbone_adr_shift
 
+        # FSM.
         self.fsm = fsm = FSM()
         fsm.act("IDLE",
             ahb.readyout.eq(1),
             If(ahb.sel &
               (ahb.size  == wishbone_adr_shift) &
               (ahb.trans == TransferType.NONSEQUENTIAL),
-               NextValue(wishbone.adr, ahb.addr[2:]),
+               NextValue(wishbone.adr,   ahb.addr[wishbone_adr_shift:]),
                NextValue(wishbone.dat_w, ahb.wdata),
-               NextValue(wishbone.we, ahb.write),
-               NextValue(wishbone.sel, 2**len(wishbone.sel) - 1),
+               NextValue(wishbone.we,    ahb.write),
+               NextValue(wishbone.sel,   2**len(wishbone.sel) - 1),
                NextState("ACT"),
             )
         )
@@ -85,3 +89,5 @@ class AHB2Wishbone(LiteXModule):
                 NextState("IDLE")
             )
         )
+
+        self.comb += ahb.resp.eq(wishbone.err)

litex/soc/interconnect/axi/axi_full.py

@@ -54,7 +54,7 @@ def r_description(data_width):
     ]
 
 class AXIInterface:
-    def __init__(self, data_width=32, address_width=32, id_width=1, version="axi4", clock_domain="sys",
+    def __init__(self, data_width=32, address_width=32, addressing="byte", id_width=1, version="axi4", clock_domain="sys",
         name          = None,
         bursting      = False,
         aw_user_width = 0,
@@ -66,12 +66,14 @@ class AXIInterface:
         # Parameters checks.
         # ------------------
         assert data_width in [8, 16, 32, 64, 128, 256, 512, 1024]
+        assert addressing in ["byte"]
         assert version    in ["axi3", "axi4"]
 
         # Parameters.
         # -----------
         self.data_width    = data_width
         self.address_width = address_width
+        self.addressing    = addressing
         self.id_width      = id_width
         self.version       = version
         self.clock_domain  = clock_domain

litex/soc/interconnect/axi/axi_lite.py

@@ -44,13 +44,22 @@ def r_lite_description(data_width):
     ]
 
 class AXILiteInterface:
-    def __init__(self, data_width=32, address_width=32, clock_domain="sys", name=None, bursting=False):
-        self.data_width    = data_width
-        self.address_width = address_width
-        self.clock_domain  = clock_domain
+    def __init__(self, data_width=32, address_width=32, addressing="byte", clock_domain="sys", name=None, bursting=False):
+        # Parameters checks.
+        # ------------------
+        assert addressing == "byte"
         if bursting is not False:
             raise NotImplementedError("AXI-Lite does not support bursting")
 
+        # Parameters.
+        # -----------
+        self.data_width    = data_width
+        self.address_width = address_width
+        self.addressing    = addressing
+        self.clock_domain  = clock_domain
+
+        # Channels.
+        # ---------
         self.aw = stream.Endpoint(ax_lite_description(address_width), name=name)
         self.w  = stream.Endpoint(w_lite_description(data_width),     name=name)
         self.b  = stream.Endpoint(b_lite_description(),               name=name)

litex/soc/interconnect/axi/axi_lite_to_wishbone.py

@@ -17,10 +17,15 @@ from litex.soc.interconnect.axi.axi_lite import *
 
 class AXILite2Wishbone(LiteXModule):
     def __init__(self, axi_lite, wishbone, base_address=0x00000000):
-        wishbone_adr_shift = log2_int(axi_lite.data_width//8)
+        # Parameters/Checks.
+        wishbone_adr_shift = {
+            "word" : log2_int(axi_lite.data_width//8),
+            "byte" : 0
+        }[wishbone.addressing]
         assert axi_lite.data_width    == len(wishbone.dat_r)
         assert axi_lite.address_width == len(wishbone.adr) + wishbone_adr_shift
 
+        # Signals.
         _data         = Signal(axi_lite.data_width)
         _r_addr       = Signal(axi_lite.address_width)
         _w_addr       = Signal(axi_lite.address_width)
@@ -28,6 +33,7 @@ class AXILite2Wishbone(LiteXModule):
         self.comb += _r_addr.eq(axi_lite.ar.addr - base_address)
         self.comb += _w_addr.eq(axi_lite.aw.addr - base_address)
 
+        # FSM.
         self.fsm = fsm = FSM(reset_state="IDLE")
         fsm.act("IDLE",
             If(axi_lite.ar.valid & axi_lite.aw.valid,
@@ -92,15 +98,21 @@ class AXILite2Wishbone(LiteXModule):
 
 class Wishbone2AXILite(LiteXModule):
     def __init__(self, wishbone, axi_lite, base_address=0x00000000):
-        wishbone_adr_shift = log2_int(axi_lite.data_width//8)
+        # Parameters/Checks.
+        wishbone_adr_shift = {
+            "word" : log2_int(axi_lite.data_width//8),
+            "byte" : 0
+        }[wishbone.addressing]
         assert axi_lite.data_width    == len(wishbone.dat_r)
         assert axi_lite.address_width == len(wishbone.adr) + wishbone_adr_shift
 
+        # Signals.
         _cmd_done  = Signal()
         _data_done = Signal()
         _addr      = Signal(len(wishbone.adr))
         self.comb += _addr.eq(wishbone.adr - base_address//4)
 
+        # FSM.
         self.fsm = fsm = FSM(reset_state="IDLE")
         fsm.act("IDLE",
             NextValue(_cmd_done,  0),

litex/soc/interconnect/csr_bus.py

@@ -52,6 +52,7 @@ _layout = [
 ]
 
 class Interface(Record):
+    addressing = "word"
     def __init__(self, data_width=8, address_width=14, alignment=32):
         self.data_width    = data_width
         self.address_width = address_width

litex/soc/interconnect/wishbone.py

@@ -45,18 +45,21 @@ CTI_BURST_END          = 0b111
 
 
 class Interface(Record):
-    def __init__(self, data_width=32, adr_width=30, bursting=False, **kwargs):
+    def __init__(self, data_width=32, adr_width=30, bursting=False, addressing="word", **kwargs):
         self.data_width = data_width
         if kwargs.get("address_width", False):
             # FIXME: Improve or switch Wishbone to byte addressing instead of word addressing.
             adr_width = kwargs["address_width"] - int(log2(data_width//8))
         self.adr_width     = adr_width
-        self.address_width = adr_width +  int(log2(data_width//8))
+        self.address_width = adr_width + int(log2(data_width//8))
         self.bursting      = bursting
+        assert addressing in ["word", "byte"]
+        self.addressing    = addressing
         Record.__init__(self, set_layout_parameters(_layout,
-            adr_width  = adr_width,
+            adr_width  = adr_width + (int(log2(data_width//8)) if (addressing == "byte") else 0),
             data_width = data_width,
-            sel_width  = data_width//8))
+            sel_width  = data_width//8,
+        ))
         self.adr.reset_less   = True
         self.dat_w.reset_less = True
         self.dat_r.reset_less = True
@@ -272,12 +275,16 @@ class DownConverter(Module):
 
     """
     def __init__(self, master, slave):
+        # Parameters/Checks.
+        assert master.addressing == "word" # FIXME: Test/Remove byte addressing limitation.
+        assert master.addressing == "word" # FIXME: Test/Remove byte addressing limitation.
         dw_from = len(master.dat_w)
         dw_to   = len(slave.dat_w)
         ratio   = dw_from//dw_to
 
         # # #
 
+        # Signals.
         skip  = Signal()
         done  = Signal()
         count = Signal(max=ratio)
@@ -332,6 +339,9 @@ class DownConverter(Module):
 class UpConverter(Module):
     """UpConverter"""
     def __init__(self, master, slave):
+        # Parameters/Checks.
+        assert master.addressing == "word" # FIXME: Test/Remove byte addressing limitation.
+        assert master.addressing == "word" # FIXME: Test/Remove byte addressing limitation.
         dw_from = len(master.dat_w)
         dw_to   = len(slave.dat_w)
         ratio   = dw_to//dw_from
@@ -359,17 +369,24 @@ class Converter(Module):
     def __init__(self, master, slave):
         self.master = master
         self.slave = slave
+        assert master.addressing == "word" # FIXME: Test/Remove byte addressing limitation.
+        assert master.addressing == "word" # FIXME: Test/Remove byte addressing limitation.
 
         # # #
 
+        # Signals.
         dw_from = len(master.dat_r)
-        dw_to = len(slave.dat_r)
+        dw_to   = len(slave.dat_r)
+
+        # DownConverter.
         if dw_from > dw_to:
             downconverter = DownConverter(master, slave)
             self.submodules += downconverter
+        # UpConverter.
         elif dw_from < dw_to:
             upconverter = UpConverter(master, slave)
             self.submodules += upconverter
+        # Direct Connect.
         else:
             self.comb += master.connect(slave)
 
@@ -379,6 +396,7 @@ class SRAM(Module):
     def __init__(self, mem_or_size, read_only=None, write_only=None, init=None, bus=None, name=None):
         if bus is None:
             bus = Interface()
+        assert bus.addressing == "word" # FIXME: Test/Remove byte addressing limitation.
         self.bus = bus
         bus_data_width = len(self.bus.dat_r)
         if isinstance(mem_or_size, Memory):
@@ -510,13 +528,18 @@ class Wishbone2CSR(Module):
 
         # # #
 
+        wishbone_adr_shift = {
+            "word" : 0,
+            "byte" : log2_int(self.wishbone.data_width//8),
+        }[self.wishbone.addressing]
+
+        # Registered Access.
         if register:
-            fsm = FSM(reset_state="IDLE")
-            self.submodules += fsm
+            self.submodules.fsm = fsm = FSM(reset_state="IDLE")
             fsm.act("IDLE",
                 NextValue(self.csr.dat_w, self.wishbone.dat_w),
                 If(self.wishbone.cyc & self.wishbone.stb,
-                    NextValue(self.csr.adr, self.wishbone.adr),
+                    NextValue(self.csr.adr, self.wishbone.adr[wishbone_adr_shift:]),
                     NextValue(self.csr.we, self.wishbone.we & (self.wishbone.sel != 0)),
                     NextState("WRITE-READ")
                 )
@@ -531,13 +554,13 @@ class Wishbone2CSR(Module):
                 self.wishbone.dat_r.eq(self.csr.dat_r),
                 NextState("IDLE")
             )
+        # Un-Registered Access.
         else:
-            fsm = FSM(reset_state="WRITE-READ")
-            self.submodules += fsm
+            self.submodules.fsm = fsm = FSM(reset_state="WRITE-READ")
             fsm.act("WRITE-READ",
                 self.csr.dat_w.eq(self.wishbone.dat_w),
                 If(self.wishbone.cyc & self.wishbone.stb,
-                    self.csr.adr.eq(self.wishbone.adr),
+                    self.csr.adr.eq(self.wishbone.adr[wishbone_adr_shift:]),
                     self.csr.we.eq(self.wishbone.we & (self.wishbone.sel != 0)),
                     NextState("ACK")
                 )