class BaseCPU(MemObject):
type = 'BaseCPU'
abstract = True
cxx_header = "cpu/base.hh"
@classmethod
def export_methods(cls, code):
code('''
void switchOut();
void takeOverFrom(BaseCPU *cpu);
bool switchedOut();
void flushTLBs();
Counter totalInsts();
void scheduleInstStop(ThreadID tid, Counter insts, const char *cause);
void scheduleLoadStop(ThreadID tid, Counter loads, const char *cause);
''')
@classmethod
def memory_mode(cls):
"""Which memory mode does this CPU require?"""
return 'invalid'
@classmethod
def require_caches(cls):
"""Does the CPU model require caches?
Some CPU models might make assumptions that require them to
have caches.
"""
return False
@classmethod
def support_take_over(cls):
"""Does the CPU model support CPU takeOverFrom?"""
return False
def takeOverFrom(self, old_cpu):
self._ccObject.takeOverFrom(old_cpu._ccObject)
system = Param.System(Parent.any, "system object")
cpu_id = Param.Int(-1, "CPU identifier")
socket_id = Param.Unsigned(0, "Physical Socket identifier")
numThreads = Param.Unsigned(1, "number of HW thread contexts")
function_trace = Param.Bool(False, "Enable function trace")
function_trace_start = Param.Tick(0, "Tick to start function trace")
checker = Param.BaseCPU(NULL, "checker CPU")
do_checkpoint_insts = Param.Bool(True,
"enable checkpoint pseudo instructions")
do_statistics_insts = Param.Bool(True,
"enable statistics pseudo instructions")
profile = Param.Latency('0ns', "trace the kernel stack")
do_quiesce = Param.Bool(True, "enable quiesce instructions")
workload = VectorParam.Process([], "processes to run")
if buildEnv['TARGET_ISA'] == 'sparc':
dtb = Param.SparcTLB(SparcTLB(), "Data TLB")
itb = Param.SparcTLB(SparcTLB(), "Instruction TLB")
interrupts = Param.SparcInterrupts(NULL, "Interrupt Controller")
isa = VectorParam.SparcISA([isa_class()], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'alpha':
dtb = Param.AlphaTLB(AlphaDTB(), "Data TLB")
itb = Param.AlphaTLB(AlphaITB(), "Instruction TLB")
interrupts = Param.AlphaInterrupts(NULL, "Interrupt Controller")
isa = VectorParam.AlphaISA([isa_class()], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'x86':
dtb = Param.X86TLB(X86TLB(), "Data TLB")
itb = Param.X86TLB(X86TLB(), "Instruction TLB")
interrupts = Param.X86LocalApic(NULL, "Interrupt Controller")
isa = VectorParam.X86ISA([isa_class()], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'mips':
dtb = Param.MipsTLB(MipsTLB(), "Data TLB")
itb = Param.MipsTLB(MipsTLB(), "Instruction TLB")
interrupts = Param.MipsInterrupts(NULL, "Interrupt Controller")
isa = VectorParam.MipsISA([isa_class()], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'arm':
dtb = Param.ArmTLB(ArmTLB(), "Data TLB")
itb = Param.ArmTLB(ArmTLB(), "Instruction TLB")
istage2_mmu = Param.ArmStage2MMU(ArmStage2IMMU(), "Stage 2 trans")
dstage2_mmu = Param.ArmStage2MMU(ArmStage2DMMU(), "Stage 2 trans")
interrupts = Param.ArmInterrupts(NULL, "Interrupt Controller")
isa = VectorParam.ArmISA([isa_class()], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'power':
UnifiedTLB = Param.Bool(True, "Is this a Unified TLB?")
dtb = Param.PowerTLB(PowerTLB(), "Data TLB")
itb = Param.PowerTLB(PowerTLB(), "Instruction TLB")
interrupts = Param.PowerInterrupts(NULL, "Interrupt Controller")
isa = VectorParam.PowerISA([isa_class()], "ISA instance")
else:
print "Don't know what TLB to use for ISA %s" % \
buildEnv['TARGET_ISA']
sys.exit(1)
max_insts_all_threads = Param.Counter(
0, "terminate when all threads have reached this inst count")
max_insts_any_thread = Param.Counter(
0, "terminate when any thread reaches this inst count")
simpoint_start_insts = VectorParam.Counter(
[], "starting instruction counts of simpoints")
max_loads_all_threads = Param.Counter(
0, "terminate when all threads have reached this load count")
max_loads_any_thread = Param.Counter(
0, "terminate when any thread reaches this load count")
progress_interval = Param.Frequency(
'0Hz', "frequency to print out the progress message")
switched_out = Param.Bool(False,
"Leave the CPU switched out after startup (used when switching " \
"between CPU models)")
tracer = Param.InstTracer(default_tracer, "Instruction tracer")
icache_port = MasterPort("Instruction Port")
dcache_port = MasterPort("Data Port")
_cached_ports = ['icache_port', 'dcache_port']
if buildEnv['TARGET_ISA'] in ['x86', 'arm']:
_cached_ports += ["itb.walker.port", "dtb.walker.port"]
_uncached_slave_ports = []
_uncached_master_ports = []
if buildEnv['TARGET_ISA'] == 'x86':
_uncached_slave_ports += ["interrupts.pio", "interrupts.int_slave"]
_uncached_master_ports += ["interrupts.int_master"]
def createInterruptController(self):
if buildEnv['TARGET_ISA'] == 'sparc':
self.interrupts = SparcInterrupts()
elif buildEnv['TARGET_ISA'] == 'alpha':
self.interrupts = AlphaInterrupts()
elif buildEnv['TARGET_ISA'] == 'x86':
self.apic_clk_domain = DerivedClockDomain(
clk_domain=Parent.clk_domain, clk_divider=16)
self.interrupts = X86LocalApic(clk_domain=self.apic_clk_domain,
pio_addr=0x2000000000000000)
_localApic = self.interrupts
elif buildEnv['TARGET_ISA'] == 'mips':
self.interrupts = MipsInterrupts()
elif buildEnv['TARGET_ISA'] == 'arm':
self.interrupts = ArmInterrupts()
elif buildEnv['TARGET_ISA'] == 'power':
self.interrupts = PowerInterrupts()
else:
print "Don't know what Interrupt Controller to use for ISA %s" % \
buildEnv['TARGET_ISA']
sys.exit(1)
def connectCachedPorts(self, bus):
for p in self._cached_ports:
exec('self.%s = bus.slave' % p)
def connectUncachedPorts(self, bus):
for p in self._uncached_slave_ports:
exec('self.%s = bus.master' % p)
for p in self._uncached_master_ports:
exec('self.%s = bus.slave' % p)
def connectAllPorts(self, cached_bus, uncached_bus=None):
self.connectCachedPorts(cached_bus)
if not uncached_bus:
uncached_bus = cached_bus
self.connectUncachedPorts(uncached_bus)
def addPrivateSplitL1Caches(self, ic, dc, iwc=None, dwc=None):
self.icache = ic
self.dcache = dc
self.icache_port = ic.cpu_side
self.dcache_port = dc.cpu_side
self._cached_ports = ['icache.mem_side', 'dcache.mem_side']
# AK: Add nvwrite side to icache and dcache
self._uncached_master_ports = [
'icache.nvwrite_side', 'dcache.nvwrite_side'
]
if buildEnv['TARGET_ISA'] in ['x86', 'arm']:
if iwc and dwc:
self.itb_walker_cache = iwc
self.dtb_walker_cache = dwc
self.itb.walker.port = iwc.cpu_side
self.dtb.walker.port = dwc.cpu_side
self._cached_ports += ["itb_walker_cache.mem_side", \
"dtb_walker_cache.mem_side"]
else:
self._cached_ports += ["itb.walker.port", "dtb.walker.port"]
# Checker doesn't need its own tlb caches because it does
# functional accesses only
if self.checker != NULL:
self._cached_ports += ["checker.itb.walker.port", \
"checker.dtb.walker.port"]
def addTwoLevelCacheHierarchy(self, ic, dc, l2c, iwc=None, dwc=None):
self.addPrivateSplitL1Caches(ic, dc, iwc, dwc)
self.toL2Bus = L2XBar()
self.connectCachedPorts(self.toL2Bus)
self.l2cache = l2c
self.toL2Bus.master = self.l2cache.cpu_side
self._cached_ports = ['l2cache.mem_side']
def createThreads(self):
self.isa = [isa_class() for i in xrange(self.numThreads)]
if self.checker != NULL:
self.checker.createThreads()
def addCheckerCpu(self):
pass
class BaseCPU(MemObject):
type = 'BaseCPU'
abstract = True
cxx_header = "cpu/base.hh"
cxx_exports = [
PyBindMethod("switchOut"),
PyBindMethod("takeOverFrom"),
PyBindMethod("switchedOut"),
PyBindMethod("flushTLBs"),
PyBindMethod("totalInsts"),
PyBindMethod("scheduleInstStop"),
PyBindMethod("scheduleLoadStop"),
PyBindMethod("getCurrentInstCount"),
]
@classmethod
def memory_mode(cls):
"""Which memory mode does this CPU require?"""
return 'invalid'
@classmethod
def require_caches(cls):
"""Does the CPU model require caches?
Some CPU models might make assumptions that require them to
have caches.
"""
return False
@classmethod
def support_take_over(cls):
"""Does the CPU model support CPU takeOverFrom?"""
return False
def takeOverFrom(self, old_cpu):
self._ccObject.takeOverFrom(old_cpu._ccObject)
system = Param.System(Parent.any, "system object")
cpu_id = Param.Int(-1, "CPU identifier")
socket_id = Param.Unsigned(0, "Physical Socket identifier")
numThreads = Param.Unsigned(1, "number of HW thread contexts")
pwr_gating_latency = Param.Cycles(
300,
"Latency to enter power gating state when all contexts are suspended")
power_gating_on_idle = Param.Bool(False, "Control whether the core goes "\
"to the OFF power state after all thread are disabled for "\
"pwr_gating_latency cycles")
function_trace = Param.Bool(False, "Enable function trace")
function_trace_start = Param.Tick(0, "Tick to start function trace")
checker = Param.BaseCPU(NULL, "checker CPU")
syscallRetryLatency = Param.Cycles(10000, "Cycles to wait until retry")
do_checkpoint_insts = Param.Bool(True,
"enable checkpoint pseudo instructions")
do_statistics_insts = Param.Bool(True,
"enable statistics pseudo instructions")
profile = Param.Latency('0ns', "trace the kernel stack")
do_quiesce = Param.Bool(True, "enable quiesce instructions")
wait_for_remote_gdb = Param.Bool(False, "Wait for a remote GDB connection")
workload = VectorParam.Process([], "processes to run")
dtb = Param.BaseTLB(ArchDTB(), "Data TLB")
itb = Param.BaseTLB(ArchITB(), "Instruction TLB")
if buildEnv['TARGET_ISA'] == 'sparc':
interrupts = VectorParam.SparcInterrupts([], "Interrupt Controller")
isa = VectorParam.SparcISA([], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'alpha':
interrupts = VectorParam.AlphaInterrupts([], "Interrupt Controller")
isa = VectorParam.AlphaISA([], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'x86':
interrupts = VectorParam.X86LocalApic([], "Interrupt Controller")
isa = VectorParam.X86ISA([], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'mips':
interrupts = VectorParam.MipsInterrupts([], "Interrupt Controller")
isa = VectorParam.MipsISA([], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'arm':
istage2_mmu = Param.ArmStage2MMU(ArmStage2IMMU(), "Stage 2 trans")
dstage2_mmu = Param.ArmStage2MMU(ArmStage2DMMU(), "Stage 2 trans")
interrupts = VectorParam.ArmInterrupts([], "Interrupt Controller")
isa = VectorParam.ArmISA([], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'power':
UnifiedTLB = Param.Bool(True, "Is this a Unified TLB?")
interrupts = VectorParam.PowerInterrupts([], "Interrupt Controller")
isa = VectorParam.PowerISA([], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'riscv':
interrupts = VectorParam.RiscvInterrupts([], "Interrupt Controller")
isa = VectorParam.RiscvISA([], "ISA instance")
else:
print("Don't know what TLB to use for ISA %s" % buildEnv['TARGET_ISA'])
sys.exit(1)
max_insts_all_threads = Param.Counter(
0, "terminate when all threads have reached this inst count")
max_insts_any_thread = Param.Counter(
0, "terminate when any thread reaches this inst count")
simpoint_start_insts = VectorParam.Counter(
[], "starting instruction counts of simpoints")
max_loads_all_threads = Param.Counter(
0, "terminate when all threads have reached this load count")
max_loads_any_thread = Param.Counter(
0, "terminate when any thread reaches this load count")
progress_interval = Param.Frequency(
'0Hz', "frequency to print out the progress message")
switched_out = Param.Bool(False,
"Leave the CPU switched out after startup (used when switching " \
"between CPU models)")
tracer = Param.InstTracer(default_tracer, "Instruction tracer")
icache_port = MasterPort("Instruction Port")
dcache_port = MasterPort("Data Port")
_cached_ports = ['icache_port', 'dcache_port']
if buildEnv['TARGET_ISA'] in ['x86', 'arm']:
_cached_ports += ["itb.walker.port", "dtb.walker.port"]
_uncached_slave_ports = []
_uncached_master_ports = []
if buildEnv['TARGET_ISA'] == 'x86':
_uncached_slave_ports += [
"interrupts[0].pio", "interrupts[0].int_slave"
]
_uncached_master_ports += ["interrupts[0].int_master"]
def createInterruptController(self):
if buildEnv['TARGET_ISA'] == 'sparc':
self.interrupts = [
SparcInterrupts() for i in xrange(self.numThreads)
]
elif buildEnv['TARGET_ISA'] == 'alpha':
self.interrupts = [
AlphaInterrupts() for i in xrange(self.numThreads)
]
elif buildEnv['TARGET_ISA'] == 'x86':
self.apic_clk_domain = DerivedClockDomain(
clk_domain=Parent.clk_domain, clk_divider=16)
self.interrupts = [
X86LocalApic(clk_domain=self.apic_clk_domain,
pio_addr=0x2000000000000000)
for i in xrange(self.numThreads)
]
_localApic = self.interrupts
elif buildEnv['TARGET_ISA'] == 'mips':
self.interrupts = [
MipsInterrupts() for i in xrange(self.numThreads)
]
elif buildEnv['TARGET_ISA'] == 'arm':
self.interrupts = [
ArmInterrupts() for i in xrange(self.numThreads)
]
elif buildEnv['TARGET_ISA'] == 'power':
self.interrupts = [
PowerInterrupts() for i in xrange(self.numThreads)
]
elif buildEnv['TARGET_ISA'] == 'riscv':
self.interrupts = \
[RiscvInterrupts() for i in xrange(self.numThreads)]
else:
print("Don't know what Interrupt Controller to use for ISA %s" %
buildEnv['TARGET_ISA'])
sys.exit(1)
def connectCachedPorts(self, bus):
for p in self._cached_ports:
exec('self.%s = bus.slave' % p)
def connectUncachedPorts(self, bus):
for p in self._uncached_slave_ports:
exec('self.%s = bus.master' % p)
for p in self._uncached_master_ports:
exec('self.%s = bus.slave' % p)
def connectAllPorts(self, cached_bus, uncached_bus=None):
self.connectCachedPorts(cached_bus)
if not uncached_bus:
uncached_bus = cached_bus
self.connectUncachedPorts(uncached_bus)
def addPrivateSplitL1Caches(self, ic, dc, iwc=None, dwc=None):
self.icache = ic
self.dcache = dc
self.icache_port = ic.cpu_side
self.dcache_port = dc.cpu_side
self._cached_ports = ['icache.mem_side', 'dcache.mem_side']
if buildEnv['TARGET_ISA'] in ['x86', 'arm']:
if iwc and dwc:
self.itb_walker_cache = iwc
self.dtb_walker_cache = dwc
self.itb.walker.port = iwc.cpu_side
self.dtb.walker.port = dwc.cpu_side
self._cached_ports += ["itb_walker_cache.mem_side", \
"dtb_walker_cache.mem_side"]
else:
self._cached_ports += ["itb.walker.port", "dtb.walker.port"]
# Checker doesn't need its own tlb caches because it does
# functional accesses only
if self.checker != NULL:
self._cached_ports += ["checker.itb.walker.port", \
"checker.dtb.walker.port"]
def addTwoLevelCacheHierarchy(self,
ic,
dc,
l2c,
iwc=None,
dwc=None,
xbar=None):
self.addPrivateSplitL1Caches(ic, dc, iwc, dwc)
self.toL2Bus = xbar if xbar else L2XBar()
self.connectCachedPorts(self.toL2Bus)
self.l2cache = l2c
self.toL2Bus.master = self.l2cache.cpu_side
self._cached_ports = ['l2cache.mem_side']
def createThreads(self):
# If no ISAs have been created, assume that the user wants the
# default ISA.
if len(self.isa) == 0:
self.isa = [default_isa_class() for i in xrange(self.numThreads)]
else:
if len(self.isa) != int(self.numThreads):
raise RuntimeError("Number of ISA instances doesn't "
"match thread count")
if self.checker != NULL:
self.checker.createThreads()
def addCheckerCpu(self):
pass
def createPhandleKey(self, thread):
# This method creates a unique key for this cpu as a function of a
# certain thread
return 'CPU-%d-%d-%d' % (self.socket_id, self.cpu_id, thread)
#Generate simple CPU Device Tree structure
def generateDeviceTree(self, state):
"""Generate cpu nodes for each thread and the corresponding part of the
cpu-map node. Note that this implementation does not support clusters
of clusters. Note that GEM5 is not compatible with the official way of
numbering cores as defined in the Device Tree documentation. Where the
cpu_id needs to reset to 0 for each cluster by specification, GEM5
expects the cpu_id to be globally unique and incremental. This
generated node adheres the GEM5 way of doing things."""
if bool(self.switched_out):
return
cpus_node = FdtNode('cpus')
cpus_node.append(state.CPUCellsProperty())
#Special size override of 0
cpus_node.append(FdtPropertyWords('#size-cells', [0]))
# Generate cpu nodes
for i in range(int(self.numThreads)):
reg = (int(self.socket_id) << 8) + int(self.cpu_id) + i
node = FdtNode("cpu@%x" % reg)
node.append(FdtPropertyStrings("device_type", "cpu"))
node.appendCompatible(["gem5,arm-cpu"])
node.append(FdtPropertyWords("reg", state.CPUAddrCells(reg)))
platform, found = self.system.unproxy(self).find_any(Platform)
if found:
platform.annotateCpuDeviceNode(node, state)
else:
warn("Platform not found for device tree generation; " \
"system or multiple CPUs may not start")
freq = round(self.clk_domain.unproxy(self).clock[0].frequency)
node.append(FdtPropertyWords("clock-frequency", freq))
# Unique key for this CPU
phandle_key = self.createPhandleKey(i)
node.appendPhandle(phandle_key)
cpus_node.append(node)
yield cpus_node
class BaseCPU(MemObject):
type = 'BaseCPU'
abstract = True
cxx_header = "cpu/base.hh"
cxx_exports = [
PyBindMethod("switchOut"),
PyBindMethod("takeOverFrom"),
PyBindMethod("switchedOut"),
PyBindMethod("flushTLBs"),
PyBindMethod("totalInsts"),
PyBindMethod("scheduleInstStop"),
PyBindMethod("scheduleLoadStop"),
PyBindMethod("getCurrentInstCount"),
]
@classmethod
def memory_mode(cls):
"""Which memory mode does this CPU require?"""
return 'invalid'
@classmethod
def require_caches(cls):
"""Does the CPU model require caches?
Some CPU models might make assumptions that require them to
have caches.
"""
return False
@classmethod
def support_take_over(cls):
"""Does the CPU model support CPU takeOverFrom?"""
return False
def takeOverFrom(self, old_cpu):
self._ccObject.takeOverFrom(old_cpu._ccObject)
system = Param.System(Parent.any, "system object")
cpu_id = Param.Int(-1, "CPU identifier")
socket_id = Param.Unsigned(0, "Physical Socket identifier")
numThreads = Param.Unsigned(1, "number of HW thread contexts")
pwr_gating_latency = Param.Cycles(
300,
"Latency to enter power gating state when all contexts are suspended")
power_gating_on_idle = Param.Bool(False, "Control whether the core goes "\
"to the OFF power state after all thread are disabled for "\
"pwr_gating_latency cycles")
function_trace = Param.Bool(False, "Enable function trace")
function_trace_start = Param.Tick(0, "Tick to start function trace")
checker = Param.BaseCPU(NULL, "checker CPU")
syscallRetryLatency = Param.Cycles(10000, "Cycles to wait until retry")
do_checkpoint_insts = Param.Bool(True,
"enable checkpoint pseudo instructions")
do_statistics_insts = Param.Bool(True,
"enable statistics pseudo instructions")
profile = Param.Latency('0ns', "trace the kernel stack")
do_quiesce = Param.Bool(True, "enable quiesce instructions")
wait_for_remote_gdb = Param.Bool(False, "Wait for a remote GDB connection")
workload = VectorParam.Process([], "processes to run")
if buildEnv['TARGET_ISA'] == 'sparc':
dtb = Param.SparcTLB(SparcTLB(), "Data TLB")
itb = Param.SparcTLB(SparcTLB(), "Instruction TLB")
interrupts = VectorParam.SparcInterrupts([], "Interrupt Controller")
isa = VectorParam.SparcISA([], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'alpha':
dtb = Param.AlphaTLB(AlphaDTB(), "Data TLB")
itb = Param.AlphaTLB(AlphaITB(), "Instruction TLB")
interrupts = VectorParam.AlphaInterrupts([], "Interrupt Controller")
isa = VectorParam.AlphaISA([], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'x86':
dtb = Param.X86TLB(X86TLB(), "Data TLB")
itb = Param.X86TLB(X86TLB(), "Instruction TLB")
interrupts = VectorParam.X86LocalApic([], "Interrupt Controller")
isa = VectorParam.X86ISA([], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'mips':
dtb = Param.MipsTLB(MipsTLB(), "Data TLB")
itb = Param.MipsTLB(MipsTLB(), "Instruction TLB")
interrupts = VectorParam.MipsInterrupts([], "Interrupt Controller")
isa = VectorParam.MipsISA([], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'arm':
dtb = Param.ArmTLB(ArmTLB(), "Data TLB")
itb = Param.ArmTLB(ArmTLB(), "Instruction TLB")
istage2_mmu = Param.ArmStage2MMU(ArmStage2IMMU(), "Stage 2 trans")
dstage2_mmu = Param.ArmStage2MMU(ArmStage2DMMU(), "Stage 2 trans")
interrupts = VectorParam.ArmInterrupts([], "Interrupt Controller")
isa = VectorParam.ArmISA([], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'power':
UnifiedTLB = Param.Bool(True, "Is this a Unified TLB?")
dtb = Param.PowerTLB(PowerTLB(), "Data TLB")
itb = Param.PowerTLB(PowerTLB(), "Instruction TLB")
interrupts = VectorParam.PowerInterrupts([], "Interrupt Controller")
isa = VectorParam.PowerISA([], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'riscv':
dtb = Param.RiscvTLB(RiscvTLB(), "Data TLB")
itb = Param.RiscvTLB(RiscvTLB(), "Instruction TLB")
interrupts = VectorParam.RiscvInterrupts([], "Interrupt Controller")
isa = VectorParam.RiscvISA([], "ISA instance")
else:
print "Don't know what TLB to use for ISA %s" % \
buildEnv['TARGET_ISA']
sys.exit(1)
max_insts_all_threads = Param.Counter(
0, "terminate when all threads have reached this inst count")
max_insts_any_thread = Param.Counter(
0, "terminate when any thread reaches this inst count")
simpoint_start_insts = VectorParam.Counter(
[], "starting instruction counts of simpoints")
max_loads_all_threads = Param.Counter(
0, "terminate when all threads have reached this load count")
max_loads_any_thread = Param.Counter(
0, "terminate when any thread reaches this load count")
progress_interval = Param.Frequency(
'0Hz', "frequency to print out the progress message")
switched_out = Param.Bool(False,
"Leave the CPU switched out after startup (used when switching " \
"between CPU models)")
tracer = Param.InstTracer(default_tracer, "Instruction tracer")
icache_port = MasterPort("Instruction Port")
dcache_port = MasterPort("Data Port")
_cached_ports = ['icache_port', 'dcache_port']
if buildEnv['TARGET_ISA'] in ['x86', 'arm']:
_cached_ports += ["itb.walker.port", "dtb.walker.port"]
_uncached_slave_ports = []
_uncached_master_ports = []
if buildEnv['TARGET_ISA'] == 'x86':
_uncached_slave_ports += [
"interrupts[0].pio", "interrupts[0].int_slave"
]
_uncached_master_ports += ["interrupts[0].int_master"]
def createInterruptController(self):
if buildEnv['TARGET_ISA'] == 'sparc':
self.interrupts = [
SparcInterrupts() for i in xrange(self.numThreads)
]
elif buildEnv['TARGET_ISA'] == 'alpha':
self.interrupts = [
AlphaInterrupts() for i in xrange(self.numThreads)
]
elif buildEnv['TARGET_ISA'] == 'x86':
self.apic_clk_domain = DerivedClockDomain(
clk_domain=Parent.clk_domain, clk_divider=16)
self.interrupts = [
X86LocalApic(clk_domain=self.apic_clk_domain,
pio_addr=0x2000000000000000)
for i in xrange(self.numThreads)
]
_localApic = self.interrupts
elif buildEnv['TARGET_ISA'] == 'mips':
self.interrupts = [
MipsInterrupts() for i in xrange(self.numThreads)
]
elif buildEnv['TARGET_ISA'] == 'arm':
self.interrupts = [
ArmInterrupts() for i in xrange(self.numThreads)
]
elif buildEnv['TARGET_ISA'] == 'power':
self.interrupts = [
PowerInterrupts() for i in xrange(self.numThreads)
]
elif buildEnv['TARGET_ISA'] == 'riscv':
self.interrupts = \
[RiscvInterrupts() for i in xrange(self.numThreads)]
else:
print "Don't know what Interrupt Controller to use for ISA %s" % \
buildEnv['TARGET_ISA']
sys.exit(1)
def connectCachedPorts(self, bus):
for p in self._cached_ports:
exec('self.%s = bus.slave' % p)
def connectUncachedPorts(self, bus):
for p in self._uncached_slave_ports:
exec('self.%s = bus.master' % p)
for p in self._uncached_master_ports:
exec('self.%s = bus.slave' % p)
def connectAllPorts(self, cached_bus, uncached_bus=None):
self.connectCachedPorts(cached_bus)
if not uncached_bus:
uncached_bus = cached_bus
self.connectUncachedPorts(uncached_bus)
def addPrivateSplitL1Caches(self, ic, dc, iwc=None, dwc=None, dspm=None):
if dspm:
self.icache = ic
self.icache_port = ic.cpu_side
self.dspm = dspm
self.dcache_port = dspm.cpu_side #weird but correct!
if dc:
self.dcache = dc
self.dspm.mem_side = self.dcache.cpu_side
self._cached_ports = ['icache.mem_side', 'dcache.mem_side']
else:
self._cached_ports = ['icache.mem_side', 'dspm.mem_side']
else:
self.icache = ic
self.dcache = dc
self.icache_port = ic.cpu_side
self.dcache_port = dc.cpu_side
self._cached_ports = ['icache.mem_side', 'dcache.mem_side']
if buildEnv['TARGET_ISA'] in ['x86', 'arm']:
if iwc and dwc:
self.itb_walker_cache = iwc
self.dtb_walker_cache = dwc
self.itb.walker.port = iwc.cpu_side
self.dtb.walker.port = dwc.cpu_side
self._cached_ports += ["itb_walker_cache.mem_side", \
"dtb_walker_cache.mem_side"]
else:
self._cached_ports += ["itb.walker.port", "dtb.walker.port"]
# Checker doesn't need its own tlb caches because it does
# functional accesses only
if self.checker != NULL:
self._cached_ports += ["checker.itb.walker.port", \
"checker.dtb.walker.port"]
def addTwoLevelCacheHierarchy(self, ic, dc, l2c, iwc=None, dwc=None):
self.addPrivateSplitL1Caches(ic, dc, iwc, dwc)
self.toL2Bus = L2XBar()
self.connectCachedPorts(self.toL2Bus)
self.l2cache = l2c
self.toL2Bus.master = self.l2cache.cpu_side
self._cached_ports = ['l2cache.mem_side']
def createThreads(self):
# If no ISAs have been created, assume that the user wants the
# default ISA.
if len(self.isa) == 0:
self.isa = [default_isa_class() for i in xrange(self.numThreads)]
else:
if len(self.isa) != int(self.numThreads):
raise RuntimeError("Number of ISA instances doesn't "
"match thread count")
if self.checker != NULL:
self.checker.createThreads()
def addCheckerCpu(self):
pass