Wire instruction and data buses (WIP) to Minerva core
This commit is contained in:
parent
2a4f6dd07e
commit
ca135d024f
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from nmigen import *
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"""
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Data Bus (Wishbone Slave)
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"""
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# TODO: Perhaps axiomatize a read-write data store where the
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# data bus reads from / writes to when requested by the CPU core?
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class DataBus(Elaboratable):
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def __init__(self):
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self.adr = Signal(30)
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self.dat_w = Signal(32)
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self.dat_r = Signal(32)
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self.sel = Signal(4)
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self.cyc = Signal(1)
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self.stb = Signal(1)
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self.ack = Signal(1)
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self.we = Signal(1)
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self.cti = Signal(3)
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self.bte = Signal(2)
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self.err = Signal(1)
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def ports(self):
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input_ports = [
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self.adr,
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self.dat_w,
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self.sel,
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self.cyc,
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self.stb,
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self.we,
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self.cti,
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self.bte
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]
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output_ports = [
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self.dat_r,
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self.ack,
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self.err
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]
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return input_ports + output_ports
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def elaborate(self, platform):
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m = Module()
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# TODO
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return m
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@ -0,0 +1,45 @@
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from nmigen import *
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"""
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Instruction Bus (Wishbone Slave)
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"""
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# TODO: Perhaps axiomatize a read-only instruction store where the
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# instruction bus reads from when requested by the CPU core?
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class InstructionBus(Elaboratable):
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def __init__(self):
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self.adr = Signal(30)
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self.dat_w = Signal(32)
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self.dat_r = Signal(32)
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self.sel = Signal(4)
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self.cyc = Signal(1)
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self.stb = Signal(1)
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self.ack = Signal(1)
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self.we = Signal(1)
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self.cti = Signal(3)
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self.bte = Signal(2)
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self.err = Signal(1)
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def ports(self):
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input_ports = [
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self.adr,
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self.dat_w,
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self.sel,
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self.cyc,
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self.stb,
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self.we,
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self.cti,
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self.bte
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]
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output_ports = [
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self.dat_r,
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self.ack,
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self.err
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]
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return input_ports + output_ports
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def elaborate(self, platform):
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m = Module()
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# TODO
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return m
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@ -8,6 +8,8 @@ from ...checks.liveness_check import *
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from ...checks.unique_check import *
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from ...checks.unique_check import *
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from minerva.core import *
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from minerva.core import *
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from ...insns.isa_rv32i import *
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from ...insns.isa_rv32i import *
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from .ibus import *
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from .dbus import *
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from collections import namedtuple
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from collections import namedtuple
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RISCVFormalParameters = namedtuple('RISCVFormalParameters',
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RISCVFormalParameters = namedtuple('RISCVFormalParameters',
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@ -27,9 +29,31 @@ class InsnSpec(Elaboratable):
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rvformal_addr_valid=lambda x:Const(1))
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rvformal_addr_valid=lambda x:Const(1))
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# Connect Wishbone instruction bus to Minerva CPU
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# Connect Wishbone instruction bus to Minerva CPU
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# TODO
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m.submodules.ibus = ibus = InstructionBus()
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m.d.comb += ibus.adr.eq(cpu.ibus.adr)
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m.d.comb += ibus.dat_w.eq(cpu.ibus.dat_w)
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m.d.comb += cpu.ibus.dat_r.eq(ibus.dat_r)
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m.d.comb += ibus.sel.eq(cpu.ibus.sel)
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m.d.comb += ibus.cyc.eq(cpu.ibus.cyc)
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m.d.comb += ibus.stb.eq(cpu.ibus.stb)
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m.d.comb += cpu.ibus.ack.eq(ibus.ack)
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m.d.comb += ibus.we.eq(cpu.ibus.we)
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m.d.comb += ibus.cti.eq(cpu.ibus.cti)
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m.d.comb += ibus.bte.eq(cpu.ibus.bte)
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m.d.comb += cpu.ibus.err.eq(ibus.err)
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# Connect Wishbone data bus to Minerva CPU
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# Connect Wishbone data bus to Minerva CPU
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# TODO
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m.submodules.dbus = dbus = DataBus()
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m.d.comb += dbus.adr.eq(cpu.dbus.adr)
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m.d.comb += dbus.dat_w.eq(cpu.dbus.dat_w)
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m.d.comb += cpu.dbus.dat_r.eq(dbus.dat_r)
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m.d.comb += dbus.sel.eq(cpu.dbus.sel)
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m.d.comb += dbus.cyc.eq(cpu.dbus.cyc)
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m.d.comb += dbus.stb.eq(cpu.dbus.stb)
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m.d.comb += cpu.dbus.ack.eq(dbus.ack)
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m.d.comb += dbus.we.eq(cpu.dbus.we)
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m.d.comb += dbus.cti.eq(cpu.dbus.cti)
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m.d.comb += dbus.bte.eq(cpu.dbus.bte)
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m.d.comb += cpu.dbus.err.eq(dbus.err)
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# Disable all interrupts
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# Disable all interrupts
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m.d.comb += cpu.external_interrupt.eq(0)
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m.d.comb += cpu.external_interrupt.eq(0)
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m.d.comb += cpu.timer_interrupt.eq(0)
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m.d.comb += cpu.timer_interrupt.eq(0)
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@ -76,9 +100,31 @@ class PcFwdSpec(Elaboratable):
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rvformal_addr_valid=lambda x:Const(1))
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rvformal_addr_valid=lambda x:Const(1))
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# Connect Wishbone instruction bus to Minerva CPU
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# Connect Wishbone instruction bus to Minerva CPU
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# TODO
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m.submodules.ibus = ibus = InstructionBus()
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m.d.comb += ibus.adr.eq(cpu.ibus.adr)
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m.d.comb += ibus.dat_w.eq(cpu.ibus.dat_w)
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m.d.comb += cpu.ibus.dat_r.eq(ibus.dat_r)
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m.d.comb += ibus.sel.eq(cpu.ibus.sel)
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m.d.comb += ibus.cyc.eq(cpu.ibus.cyc)
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m.d.comb += ibus.stb.eq(cpu.ibus.stb)
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m.d.comb += cpu.ibus.ack.eq(ibus.ack)
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m.d.comb += ibus.we.eq(cpu.ibus.we)
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m.d.comb += ibus.cti.eq(cpu.ibus.cti)
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m.d.comb += ibus.bte.eq(cpu.ibus.bte)
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m.d.comb += cpu.ibus.err.eq(ibus.err)
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# Connect Wishbone data bus to Minerva CPU
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# Connect Wishbone data bus to Minerva CPU
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# TODO
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m.submodules.dbus = dbus = DataBus()
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m.d.comb += dbus.adr.eq(cpu.dbus.adr)
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m.d.comb += dbus.dat_w.eq(cpu.dbus.dat_w)
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m.d.comb += cpu.dbus.dat_r.eq(dbus.dat_r)
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m.d.comb += dbus.sel.eq(cpu.dbus.sel)
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m.d.comb += dbus.cyc.eq(cpu.dbus.cyc)
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m.d.comb += dbus.stb.eq(cpu.dbus.stb)
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m.d.comb += cpu.dbus.ack.eq(dbus.ack)
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m.d.comb += dbus.we.eq(cpu.dbus.we)
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m.d.comb += dbus.cti.eq(cpu.dbus.cti)
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m.d.comb += dbus.bte.eq(cpu.dbus.bte)
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m.d.comb += cpu.dbus.err.eq(dbus.err)
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# Disable all interrupts
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# Disable all interrupts
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m.d.comb += cpu.external_interrupt.eq(0)
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m.d.comb += cpu.external_interrupt.eq(0)
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m.d.comb += cpu.timer_interrupt.eq(0)
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m.d.comb += cpu.timer_interrupt.eq(0)
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@ -108,9 +154,31 @@ class PcBwdSpec(Elaboratable):
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rvformal_addr_valid=lambda x:Const(1))
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rvformal_addr_valid=lambda x:Const(1))
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# Connect Wishbone instruction bus to Minerva CPU
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# Connect Wishbone instruction bus to Minerva CPU
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# TODO
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m.submodules.ibus = ibus = InstructionBus()
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m.d.comb += ibus.adr.eq(cpu.ibus.adr)
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m.d.comb += ibus.dat_w.eq(cpu.ibus.dat_w)
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m.d.comb += cpu.ibus.dat_r.eq(ibus.dat_r)
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m.d.comb += ibus.sel.eq(cpu.ibus.sel)
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m.d.comb += ibus.cyc.eq(cpu.ibus.cyc)
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m.d.comb += ibus.stb.eq(cpu.ibus.stb)
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m.d.comb += cpu.ibus.ack.eq(ibus.ack)
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m.d.comb += ibus.we.eq(cpu.ibus.we)
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m.d.comb += ibus.cti.eq(cpu.ibus.cti)
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m.d.comb += ibus.bte.eq(cpu.ibus.bte)
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m.d.comb += cpu.ibus.err.eq(ibus.err)
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# Connect Wishbone data bus to Minerva CPU
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# Connect Wishbone data bus to Minerva CPU
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# TODO
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m.submodules.dbus = dbus = DataBus()
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m.d.comb += dbus.adr.eq(cpu.dbus.adr)
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m.d.comb += dbus.dat_w.eq(cpu.dbus.dat_w)
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m.d.comb += cpu.dbus.dat_r.eq(dbus.dat_r)
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m.d.comb += dbus.sel.eq(cpu.dbus.sel)
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m.d.comb += dbus.cyc.eq(cpu.dbus.cyc)
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m.d.comb += dbus.stb.eq(cpu.dbus.stb)
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m.d.comb += cpu.dbus.ack.eq(dbus.ack)
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m.d.comb += dbus.we.eq(cpu.dbus.we)
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m.d.comb += dbus.cti.eq(cpu.dbus.cti)
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m.d.comb += dbus.bte.eq(cpu.dbus.bte)
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m.d.comb += cpu.dbus.err.eq(dbus.err)
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# Disable all interrupts
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# Disable all interrupts
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m.d.comb += cpu.external_interrupt.eq(0)
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m.d.comb += cpu.external_interrupt.eq(0)
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m.d.comb += cpu.timer_interrupt.eq(0)
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m.d.comb += cpu.timer_interrupt.eq(0)
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@ -138,9 +206,31 @@ class RegSpec(Elaboratable):
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m.submodules.reg_spec = reg_spec = RegCheck(params=RISCVFormalParameters(32, 32, False, False, False))
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m.submodules.reg_spec = reg_spec = RegCheck(params=RISCVFormalParameters(32, 32, False, False, False))
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# Connect Wishbone instruction bus to Minerva CPU
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# Connect Wishbone instruction bus to Minerva CPU
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# TODO
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m.submodules.ibus = ibus = InstructionBus()
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m.d.comb += ibus.adr.eq(cpu.ibus.adr)
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m.d.comb += ibus.dat_w.eq(cpu.ibus.dat_w)
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m.d.comb += cpu.ibus.dat_r.eq(ibus.dat_r)
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m.d.comb += ibus.sel.eq(cpu.ibus.sel)
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m.d.comb += ibus.cyc.eq(cpu.ibus.cyc)
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m.d.comb += ibus.stb.eq(cpu.ibus.stb)
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m.d.comb += cpu.ibus.ack.eq(ibus.ack)
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m.d.comb += ibus.we.eq(cpu.ibus.we)
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m.d.comb += ibus.cti.eq(cpu.ibus.cti)
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m.d.comb += ibus.bte.eq(cpu.ibus.bte)
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m.d.comb += cpu.ibus.err.eq(ibus.err)
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# Connect Wishbone data bus to Minerva CPU
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# Connect Wishbone data bus to Minerva CPU
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# TODO
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m.submodules.dbus = dbus = DataBus()
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m.d.comb += dbus.adr.eq(cpu.dbus.adr)
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m.d.comb += dbus.dat_w.eq(cpu.dbus.dat_w)
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m.d.comb += cpu.dbus.dat_r.eq(dbus.dat_r)
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m.d.comb += dbus.sel.eq(cpu.dbus.sel)
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m.d.comb += dbus.cyc.eq(cpu.dbus.cyc)
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m.d.comb += dbus.stb.eq(cpu.dbus.stb)
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m.d.comb += cpu.dbus.ack.eq(dbus.ack)
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m.d.comb += dbus.we.eq(cpu.dbus.we)
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m.d.comb += dbus.cti.eq(cpu.dbus.cti)
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m.d.comb += dbus.bte.eq(cpu.dbus.bte)
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m.d.comb += cpu.dbus.err.eq(dbus.err)
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# Disable all interrupts
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# Disable all interrupts
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m.d.comb += cpu.external_interrupt.eq(0)
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m.d.comb += cpu.external_interrupt.eq(0)
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m.d.comb += cpu.timer_interrupt.eq(0)
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m.d.comb += cpu.timer_interrupt.eq(0)
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@ -171,9 +261,31 @@ class CausalSpec(Elaboratable):
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m.submodules.causal_spec = causal_spec = CausalCheck()
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m.submodules.causal_spec = causal_spec = CausalCheck()
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# Connect Wishbone instruction bus to Minerva CPU
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# Connect Wishbone instruction bus to Minerva CPU
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# TODO
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m.submodules.ibus = ibus = InstructionBus()
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m.d.comb += ibus.adr.eq(cpu.ibus.adr)
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m.d.comb += ibus.dat_w.eq(cpu.ibus.dat_w)
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m.d.comb += cpu.ibus.dat_r.eq(ibus.dat_r)
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m.d.comb += ibus.sel.eq(cpu.ibus.sel)
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m.d.comb += ibus.cyc.eq(cpu.ibus.cyc)
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m.d.comb += ibus.stb.eq(cpu.ibus.stb)
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m.d.comb += cpu.ibus.ack.eq(ibus.ack)
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m.d.comb += ibus.we.eq(cpu.ibus.we)
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m.d.comb += ibus.cti.eq(cpu.ibus.cti)
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m.d.comb += ibus.bte.eq(cpu.ibus.bte)
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m.d.comb += cpu.ibus.err.eq(ibus.err)
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# Connect Wishbone data bus to Minerva CPU
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# Connect Wishbone data bus to Minerva CPU
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# TODO
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m.submodules.dbus = dbus = DataBus()
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m.d.comb += dbus.adr.eq(cpu.dbus.adr)
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m.d.comb += dbus.dat_w.eq(cpu.dbus.dat_w)
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m.d.comb += cpu.dbus.dat_r.eq(dbus.dat_r)
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m.d.comb += dbus.sel.eq(cpu.dbus.sel)
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m.d.comb += dbus.cyc.eq(cpu.dbus.cyc)
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m.d.comb += dbus.stb.eq(cpu.dbus.stb)
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m.d.comb += cpu.dbus.ack.eq(dbus.ack)
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m.d.comb += dbus.we.eq(cpu.dbus.we)
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m.d.comb += dbus.cti.eq(cpu.dbus.cti)
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m.d.comb += dbus.bte.eq(cpu.dbus.bte)
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m.d.comb += cpu.dbus.err.eq(dbus.err)
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# Disable all interrupts
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# Disable all interrupts
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m.d.comb += cpu.external_interrupt.eq(0)
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m.d.comb += cpu.external_interrupt.eq(0)
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m.d.comb += cpu.timer_interrupt.eq(0)
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m.d.comb += cpu.timer_interrupt.eq(0)
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@ -201,9 +313,31 @@ class LivenessSpec(Elaboratable):
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m.submodules.liveness_spec = liveness_spec = LivenessCheck()
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m.submodules.liveness_spec = liveness_spec = LivenessCheck()
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# Connect Wishbone instruction bus to Minerva CPU
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# Connect Wishbone instruction bus to Minerva CPU
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# TODO
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m.submodules.ibus = ibus = InstructionBus()
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m.d.comb += ibus.adr.eq(cpu.ibus.adr)
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m.d.comb += ibus.dat_w.eq(cpu.ibus.dat_w)
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m.d.comb += cpu.ibus.dat_r.eq(ibus.dat_r)
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m.d.comb += ibus.sel.eq(cpu.ibus.sel)
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m.d.comb += ibus.cyc.eq(cpu.ibus.cyc)
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m.d.comb += ibus.stb.eq(cpu.ibus.stb)
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m.d.comb += cpu.ibus.ack.eq(ibus.ack)
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m.d.comb += ibus.we.eq(cpu.ibus.we)
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m.d.comb += ibus.cti.eq(cpu.ibus.cti)
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m.d.comb += ibus.bte.eq(cpu.ibus.bte)
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m.d.comb += cpu.ibus.err.eq(ibus.err)
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# Connect Wishbone data bus to Minerva CPU
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# Connect Wishbone data bus to Minerva CPU
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# TODO
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m.submodules.dbus = dbus = DataBus()
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m.d.comb += dbus.adr.eq(cpu.dbus.adr)
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m.d.comb += dbus.dat_w.eq(cpu.dbus.dat_w)
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m.d.comb += cpu.dbus.dat_r.eq(dbus.dat_r)
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m.d.comb += dbus.sel.eq(cpu.dbus.sel)
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||||||
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m.d.comb += dbus.cyc.eq(cpu.dbus.cyc)
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||||||
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m.d.comb += dbus.stb.eq(cpu.dbus.stb)
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||||||
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m.d.comb += cpu.dbus.ack.eq(dbus.ack)
|
||||||
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m.d.comb += dbus.we.eq(cpu.dbus.we)
|
||||||
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m.d.comb += dbus.cti.eq(cpu.dbus.cti)
|
||||||
|
m.d.comb += dbus.bte.eq(cpu.dbus.bte)
|
||||||
|
m.d.comb += cpu.dbus.err.eq(dbus.err)
|
||||||
# Disable all interrupts
|
# Disable all interrupts
|
||||||
m.d.comb += cpu.external_interrupt.eq(0)
|
m.d.comb += cpu.external_interrupt.eq(0)
|
||||||
m.d.comb += cpu.timer_interrupt.eq(0)
|
m.d.comb += cpu.timer_interrupt.eq(0)
|
||||||
|
@ -230,9 +364,31 @@ class UniqueSpec(Elaboratable):
|
||||||
m.submodules.unique_spec = unique_spec = UniqueCheck()
|
m.submodules.unique_spec = unique_spec = UniqueCheck()
|
||||||
|
|
||||||
# Connect Wishbone instruction bus to Minerva CPU
|
# Connect Wishbone instruction bus to Minerva CPU
|
||||||
# TODO
|
m.submodules.ibus = ibus = InstructionBus()
|
||||||
|
m.d.comb += ibus.adr.eq(cpu.ibus.adr)
|
||||||
|
m.d.comb += ibus.dat_w.eq(cpu.ibus.dat_w)
|
||||||
|
m.d.comb += cpu.ibus.dat_r.eq(ibus.dat_r)
|
||||||
|
m.d.comb += ibus.sel.eq(cpu.ibus.sel)
|
||||||
|
m.d.comb += ibus.cyc.eq(cpu.ibus.cyc)
|
||||||
|
m.d.comb += ibus.stb.eq(cpu.ibus.stb)
|
||||||
|
m.d.comb += cpu.ibus.ack.eq(ibus.ack)
|
||||||
|
m.d.comb += ibus.we.eq(cpu.ibus.we)
|
||||||
|
m.d.comb += ibus.cti.eq(cpu.ibus.cti)
|
||||||
|
m.d.comb += ibus.bte.eq(cpu.ibus.bte)
|
||||||
|
m.d.comb += cpu.ibus.err.eq(ibus.err)
|
||||||
# Connect Wishbone data bus to Minerva CPU
|
# Connect Wishbone data bus to Minerva CPU
|
||||||
# TODO
|
m.submodules.dbus = dbus = DataBus()
|
||||||
|
m.d.comb += dbus.adr.eq(cpu.dbus.adr)
|
||||||
|
m.d.comb += dbus.dat_w.eq(cpu.dbus.dat_w)
|
||||||
|
m.d.comb += cpu.dbus.dat_r.eq(dbus.dat_r)
|
||||||
|
m.d.comb += dbus.sel.eq(cpu.dbus.sel)
|
||||||
|
m.d.comb += dbus.cyc.eq(cpu.dbus.cyc)
|
||||||
|
m.d.comb += dbus.stb.eq(cpu.dbus.stb)
|
||||||
|
m.d.comb += cpu.dbus.ack.eq(dbus.ack)
|
||||||
|
m.d.comb += dbus.we.eq(cpu.dbus.we)
|
||||||
|
m.d.comb += dbus.cti.eq(cpu.dbus.cti)
|
||||||
|
m.d.comb += dbus.bte.eq(cpu.dbus.bte)
|
||||||
|
m.d.comb += cpu.dbus.err.eq(dbus.err)
|
||||||
# Disable all interrupts
|
# Disable all interrupts
|
||||||
m.d.comb += cpu.external_interrupt.eq(0)
|
m.d.comb += cpu.external_interrupt.eq(0)
|
||||||
m.d.comb += cpu.timer_interrupt.eq(0)
|
m.d.comb += cpu.timer_interrupt.eq(0)
|
||||||
|
|
Loading…
Reference in New Issue