cores/cpu: Switch Wishbone interfaces to byte addressing where possible and remove address shifting.

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, addressing="word")
+        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(data_width=32, address_width=32, addressing="word")
+        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(data_width=32, address_width=32, addressing="word")
+        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/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(data_width=32, address_width=32, addressing="word")
-        self.dbus         = wishbone.Interface(data_width=32, address_width=32, addressing="word")
+        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(data_width=32, address_width=32, addressing="word")
-        self.dbus         = dbus = wishbone.Interface(data_width=32, address_width=32, addressing="word")
+        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(data_width=32, address_width=32, addressing="word")
-        self.dbus         = dbus = wishbone.Interface(data_width=32, address_width=32, addressing="word")
+        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).
 
@@ -123,7 +123,7 @@ class Marocchino(CPU):
             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/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(data_width=32, address_width=32, addressing="word")
-        self.dbus         = dbus = wishbone.Interface(data_width=32, address_width=32, addressing="word")
+        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(data_width=32, address_width=32, addressing="word")
+        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/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(data_width=32, address_width=32, addressing="word")
+        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/serv/core.py

@@ -59,8 +59,8 @@ class SERV(CPU):
         self.platform     = platform
         self.variant      = variant
         self.reset        = Signal()
-        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.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,