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-rw-r--r--src/cpu/simple/atomic.cc14
-rw-r--r--src/cpu/simple/atomic.hh1
-rw-r--r--src/cpu/simple/base.cc2
-rw-r--r--src/cpu/simple/timing.cc26
-rw-r--r--src/cpu/simple/timing.hh3
-rw-r--r--src/dev/ide_disk.cc8
-rw-r--r--src/dev/io_device.cc151
-rw-r--r--src/dev/io_device.hh49
-rw-r--r--src/dev/ns_gige.cc22
-rw-r--r--src/dev/ns_gige.hh2
-rw-r--r--src/dev/pcidev.cc16
-rw-r--r--src/dev/pcidev.hh5
-rw-r--r--src/dev/sinic.cc16
-rw-r--r--src/dev/sinic.hh1
-rw-r--r--src/python/m5/config.py5
-rw-r--r--src/python/m5/objects/BaseCPU.py2
-rw-r--r--src/sim/sim_object.cc29
-rw-r--r--src/sim/sim_object.hh15
-rw-r--r--src/sim/system.cc8
-rw-r--r--src/sim/system.hh17
20 files changed, 272 insertions, 120 deletions
diff --git a/src/cpu/simple/atomic.cc b/src/cpu/simple/atomic.cc
index 12bfdeb9b..1752b2b5b 100644
--- a/src/cpu/simple/atomic.cc
+++ b/src/cpu/simple/atomic.cc
@@ -33,6 +33,7 @@
#include "cpu/simple/atomic.hh"
#include "mem/packet_impl.hh"
#include "sim/builder.hh"
+#include "sim/system.hh"
using namespace std;
using namespace TheISA;
@@ -173,6 +174,13 @@ AtomicSimpleCPU::unserialize(Checkpoint *cp, const string &section)
}
void
+AtomicSimpleCPU::resume()
+{
+ assert(system->getMemoryMode() == System::Atomic);
+ changeState(SimObject::Running);
+}
+
+void
AtomicSimpleCPU::switchOut()
{
assert(status() == Running || status() == Idle);
@@ -451,11 +459,11 @@ BEGIN_DECLARE_SIM_OBJECT_PARAMS(AtomicSimpleCPU)
Param<Counter> max_loads_any_thread;
Param<Counter> max_loads_all_threads;
SimObjectParam<MemObject *> mem;
+ SimObjectParam<System *> system;
#if FULL_SYSTEM
SimObjectParam<AlphaITB *> itb;
SimObjectParam<AlphaDTB *> dtb;
- SimObjectParam<System *> system;
Param<int> cpu_id;
Param<Tick> profile;
#else
@@ -483,11 +491,11 @@ BEGIN_INIT_SIM_OBJECT_PARAMS(AtomicSimpleCPU)
INIT_PARAM(max_loads_all_threads,
"terminate when all threads have reached this load count"),
INIT_PARAM(mem, "memory"),
+ INIT_PARAM(system, "system object"),
#if FULL_SYSTEM
INIT_PARAM(itb, "Instruction TLB"),
INIT_PARAM(dtb, "Data TLB"),
- INIT_PARAM(system, "system object"),
INIT_PARAM(cpu_id, "processor ID"),
INIT_PARAM(profile, ""),
#else
@@ -520,11 +528,11 @@ CREATE_SIM_OBJECT(AtomicSimpleCPU)
params->width = width;
params->simulate_stalls = simulate_stalls;
params->mem = mem;
+ params->system = system;
#if FULL_SYSTEM
params->itb = itb;
params->dtb = dtb;
- params->system = system;
params->cpu_id = cpu_id;
params->profile = profile;
#else
diff --git a/src/cpu/simple/atomic.hh b/src/cpu/simple/atomic.hh
index 179b4a721..d59ca01aa 100644
--- a/src/cpu/simple/atomic.hh
+++ b/src/cpu/simple/atomic.hh
@@ -127,6 +127,7 @@ class AtomicSimpleCPU : public BaseSimpleCPU
virtual void serialize(std::ostream &os);
virtual void unserialize(Checkpoint *cp, const std::string &section);
+ virtual void resume();
void switchOut();
void takeOverFrom(BaseCPU *oldCPU);
diff --git a/src/cpu/simple/base.cc b/src/cpu/simple/base.cc
index a50541189..af10e64d7 100644
--- a/src/cpu/simple/base.cc
+++ b/src/cpu/simple/base.cc
@@ -55,10 +55,10 @@
#include "sim/sim_events.hh"
#include "sim/sim_object.hh"
#include "sim/stats.hh"
+#include "sim/system.hh"
#if FULL_SYSTEM
#include "base/remote_gdb.hh"
-#include "sim/system.hh"
#include "arch/tlb.hh"
#include "arch/stacktrace.hh"
#include "arch/vtophys.hh"
diff --git a/src/cpu/simple/timing.cc b/src/cpu/simple/timing.cc
index e55301c6b..d2c2c7c47 100644
--- a/src/cpu/simple/timing.cc
+++ b/src/cpu/simple/timing.cc
@@ -33,6 +33,7 @@
#include "cpu/simple/timing.hh"
#include "mem/packet_impl.hh"
#include "sim/builder.hh"
+#include "sim/system.hh"
using namespace std;
using namespace TheISA;
@@ -91,7 +92,7 @@ TimingSimpleCPU::TimingSimpleCPU(Params *p)
ifetch_pkt = dcache_pkt = NULL;
drainEvent = NULL;
fetchEvent = NULL;
- state = SimObject::Timing;
+ changeState(SimObject::Running);
}
@@ -113,18 +114,18 @@ TimingSimpleCPU::unserialize(Checkpoint *cp, const string &section)
BaseSimpleCPU::unserialize(cp, section);
}
-bool
+unsigned int
TimingSimpleCPU::drain(Event *drain_event)
{
// TimingSimpleCPU is ready to drain if it's not waiting for
// an access to complete.
if (status() == Idle || status() == Running || status() == SwitchedOut) {
- changeState(SimObject::DrainedTiming);
- return true;
+ changeState(SimObject::Drained);
+ return 0;
} else {
changeState(SimObject::Draining);
drainEvent = drain_event;
- return false;
+ return 1;
}
}
@@ -142,12 +143,9 @@ TimingSimpleCPU::resume()
new EventWrapper<TimingSimpleCPU, &TimingSimpleCPU::fetch>(this, false);
fetchEvent->schedule(curTick);
}
-}
-void
-TimingSimpleCPU::setMemoryMode(State new_mode)
-{
- assert(new_mode == SimObject::Timing);
+ assert(system->getMemoryMode() == System::Timing);
+ changeState(SimObject::Running);
}
void
@@ -514,7 +512,7 @@ void
TimingSimpleCPU::completeDrain()
{
DPRINTF(Config, "Done draining\n");
- changeState(SimObject::DrainedTiming);
+ changeState(SimObject::Drained);
drainEvent->process();
}
@@ -551,11 +549,11 @@ BEGIN_DECLARE_SIM_OBJECT_PARAMS(TimingSimpleCPU)
Param<Counter> max_loads_any_thread;
Param<Counter> max_loads_all_threads;
SimObjectParam<MemObject *> mem;
+ SimObjectParam<System *> system;
#if FULL_SYSTEM
SimObjectParam<AlphaITB *> itb;
SimObjectParam<AlphaDTB *> dtb;
- SimObjectParam<System *> system;
Param<int> cpu_id;
Param<Tick> profile;
#else
@@ -583,11 +581,11 @@ BEGIN_INIT_SIM_OBJECT_PARAMS(TimingSimpleCPU)
INIT_PARAM(max_loads_all_threads,
"terminate when all threads have reached this load count"),
INIT_PARAM(mem, "memory"),
+ INIT_PARAM(system, "system object"),
#if FULL_SYSTEM
INIT_PARAM(itb, "Instruction TLB"),
INIT_PARAM(dtb, "Data TLB"),
- INIT_PARAM(system, "system object"),
INIT_PARAM(cpu_id, "processor ID"),
INIT_PARAM(profile, ""),
#else
@@ -618,11 +616,11 @@ CREATE_SIM_OBJECT(TimingSimpleCPU)
params->functionTrace = function_trace;
params->functionTraceStart = function_trace_start;
params->mem = mem;
+ params->system = system;
#if FULL_SYSTEM
params->itb = itb;
params->dtb = dtb;
- params->system = system;
params->cpu_id = cpu_id;
params->profile = profile;
#else
diff --git a/src/cpu/simple/timing.hh b/src/cpu/simple/timing.hh
index 0a3f91e6c..ac36e5c99 100644
--- a/src/cpu/simple/timing.hh
+++ b/src/cpu/simple/timing.hh
@@ -137,9 +137,8 @@ class TimingSimpleCPU : public BaseSimpleCPU
virtual void serialize(std::ostream &os);
virtual void unserialize(Checkpoint *cp, const std::string &section);
- virtual bool drain(Event *drain_event);
+ virtual unsigned int drain(Event *drain_event);
virtual void resume();
- virtual void setMemoryMode(State new_mode);
void switchOut();
void takeOverFrom(BaseCPU *oldCPU);
diff --git a/src/dev/ide_disk.cc b/src/dev/ide_disk.cc
index dc78021f8..12564ddd0 100644
--- a/src/dev/ide_disk.cc
+++ b/src/dev/ide_disk.cc
@@ -318,7 +318,7 @@ IdeDisk::doDmaTransfer()
panic("Inconsistent DMA transfer state: dmaState = %d devState = %d\n",
dmaState, devState);
- if (ctrl->dmaPending()) {
+ if (ctrl->dmaPending() || ctrl->getState() != SimObject::Running) {
dmaTransferEvent.schedule(curTick + DMA_BACKOFF_PERIOD);
return;
} else
@@ -398,8 +398,7 @@ IdeDisk::doDmaRead()
curPrd.getByteCount(), TheISA::PageBytes);
}
- if (ctrl->dmaPending()) {
- panic("shouldn't be reentant??");
+ if (ctrl->dmaPending() || ctrl->getState() != SimObject::Running) {
dmaReadWaitEvent.schedule(curTick + DMA_BACKOFF_PERIOD);
return;
} else if (!dmaReadCG->done()) {
@@ -474,8 +473,7 @@ IdeDisk::doDmaWrite()
dmaWriteCG = new ChunkGenerator(curPrd.getBaseAddr(),
curPrd.getByteCount(), TheISA::PageBytes);
}
- if (ctrl->dmaPending()) {
- panic("shouldn't be reentant??");
+ if (ctrl->dmaPending() || ctrl->getState() != SimObject::Running) {
dmaWriteWaitEvent.schedule(curTick + DMA_BACKOFF_PERIOD);
return;
} else if (!dmaWriteCG->done()) {
diff --git a/src/dev/io_device.cc b/src/dev/io_device.cc
index cb4850108..ed2862065 100644
--- a/src/dev/io_device.cc
+++ b/src/dev/io_device.cc
@@ -32,10 +32,12 @@
#include "base/trace.hh"
#include "dev/io_device.hh"
#include "sim/builder.hh"
+#include "sim/system.hh"
-PioPort::PioPort(PioDevice *dev, Platform *p, std::string pname)
- : Port(dev->name() + pname), device(dev), platform(p)
+PioPort::PioPort(PioDevice *dev, System *s, std::string pname)
+ : Port(dev->name() + pname), device(dev), sys(s),
+ outTiming(0), drainEvent(NULL)
{ }
@@ -68,13 +70,23 @@ PioPort::recvRetry()
if (result)
transmitList.pop_front();
}
+ if (transmitList.size() == 0 && drainEvent) {
+ drainEvent->process();
+ drainEvent = NULL;
+ }
}
void
PioPort::SendEvent::process()
{
+ port->outTiming--;
+ assert(port->outTiming >= 0);
if (port->Port::sendTiming(packet))
- return;
+ if (port->transmitList.size() == 0 && port->drainEvent) {
+ port->drainEvent->process();
+ port->drainEvent = NULL;
+ }
+ return;
port->transmitList.push_back(packet);
}
@@ -105,6 +117,15 @@ PioPort::recvTiming(Packet *pkt)
return true;
}
+unsigned int
+PioPort::drain(Event *de)
+{
+ if (outTiming == 0 && transmitList.size() == 0)
+ return 0;
+ drainEvent = de;
+ return 1;
+}
+
PioDevice::~PioDevice()
{
if (pioPort)
@@ -119,6 +140,19 @@ PioDevice::init()
pioPort->sendStatusChange(Port::RangeChange);
}
+
+unsigned int
+PioDevice::drain(Event *de)
+{
+ unsigned int count;
+ count = pioPort->drain(de);
+ if (count)
+ changeState(Draining);
+ else
+ changeState(Drained);
+ return count;
+}
+
void
BasicPioDevice::addressRanges(AddrRangeList &range_list)
{
@@ -128,8 +162,9 @@ BasicPioDevice::addressRanges(AddrRangeList &range_list)
}
-DmaPort::DmaPort(DmaDevice *dev, Platform *p)
- : Port(dev->name() + "-dmaport"), device(dev), platform(p), pendingCount(0)
+DmaPort::DmaPort(DmaDevice *dev, System *s)
+ : Port(dev->name() + "-dmaport"), device(dev), sys(s), pendingCount(0),
+ actionInProgress(0), drainEvent(NULL)
{ }
bool
@@ -159,6 +194,11 @@ DmaPort::recvTiming(Packet *pkt)
}
delete pkt->req;
delete pkt;
+
+ if (pendingCount == 0 && drainEvent) {
+ drainEvent->process();
+ drainEvent = NULL;
+ }
} else {
panic("Got packet without sender state... huh?\n");
}
@@ -170,6 +210,29 @@ DmaDevice::DmaDevice(Params *p)
: PioDevice(p), dmaPort(NULL)
{ }
+
+unsigned int
+DmaDevice::drain(Event *de)
+{
+ unsigned int count;
+ count = pioPort->drain(de) + dmaPort->drain(de);
+ if (count)
+ changeState(Draining);
+ else
+ changeState(Drained);
+ return count;
+}
+
+unsigned int
+DmaPort::drain(Event *de)
+{
+ if (pendingCount == 0)
+ return 0;
+ drainEvent = de;
+ return 1;
+}
+
+
void
DmaPort::recvRetry()
{
@@ -195,6 +258,8 @@ DmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event,
{
assert(event);
+ assert(device->getState() == SimObject::Running);
+
DmaReqState *reqState = new DmaReqState(event, this, size);
for (ChunkGenerator gen(addr, size, peerBlockSize());
@@ -212,51 +277,53 @@ DmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event,
pendingCount++;
sendDma(pkt);
}
+
}
void
DmaPort::sendDma(Packet *pkt, bool front)
{
- // some kind of selction between access methods
- // more work is going to have to be done to make
- // switching actually work
- /* MemState state = device->platform->system->memState;
-
- if (state == Timing) { */
- DPRINTF(DMA, "Attempting to send Packet %#x with addr: %#x\n",
- pkt, pkt->getAddr());
- if (transmitList.size() || !sendTiming(pkt)) {
- if (front)
- transmitList.push_front(pkt);
- else
- transmitList.push_back(pkt);
- DPRINTF(DMA, "-- Failed: queued\n");
- } else {
- DPRINTF(DMA, "-- Done\n");
- }
- /* } else if (state == Atomic) {
- sendAtomic(pkt);
- if (pkt->senderState) {
- DmaReqState *state = dynamic_cast<DmaReqState*>(pkt->senderState);
- assert(state);
- state->completionEvent->schedule(curTick + (pkt->time -
- pkt->req->getTime()) +1);
- delete state;
- }
- pendingCount--;
- assert(pendingCount >= 0);
- delete pkt->req;
- delete pkt;
-
- } else if (state == Functional) {
- sendFunctional(pkt);
- // Is this correct???
- completionEvent->schedule(pkt->req->responseTime - pkt->req->requestTime);
- completionEvent == NULL;
+ // some kind of selction between access methods
+ // more work is going to have to be done to make
+ // switching actually work
+ System::MemoryMode state = sys->getMemoryMode();
+ if (state == System::Timing) {
+ DPRINTF(DMA, "Attempting to send Packet %#x with addr: %#x\n",
+ pkt, pkt->getAddr());
+ if (transmitList.size() || !sendTiming(pkt)) {
+ if (front)
+ transmitList.push_front(pkt);
+ else
+ transmitList.push_back(pkt);
+ DPRINTF(DMA, "-- Failed: queued\n");
+ } else {
+ DPRINTF(DMA, "-- Done\n");
+ }
+ } else if (state == System::Atomic) {
+ sendAtomic(pkt);
+ assert(pkt->senderState);
+ DmaReqState *state = dynamic_cast<DmaReqState*>(pkt->senderState);
+ assert(state);
+
+ state->numBytes += pkt->req->getSize();
+ if (state->totBytes == state->numBytes) {
+ state->completionEvent->schedule(curTick +
+ (pkt->time - pkt->req->getTime()) +1);
+ delete state;
+ delete pkt->req;
+ }
+ pendingCount--;
+ assert(pendingCount >= 0);
+ delete pkt;
+
+ if (pendingCount == 0 && drainEvent) {
+ drainEvent->process();
+ drainEvent = NULL;
+ }
+
} else
panic("Unknown memory command state.");
- */
}
DmaDevice::~DmaDevice()
diff --git a/src/dev/io_device.hh b/src/dev/io_device.hh
index 40edf6875..fa3f98247 100644
--- a/src/dev/io_device.hh
+++ b/src/dev/io_device.hh
@@ -60,9 +60,9 @@ class PioPort : public Port
/** The device that this port serves. */
PioDevice *device;
- /** The platform that device/port are in. This is used to select which mode
+ /** The system that device/port are in. This is used to select which mode
* we are currently operating in. */
- Platform *platform;
+ System *sys;
/** A list of outgoing timing response packets that haven't been serviced
* yet. */
@@ -106,16 +106,27 @@ class PioPort : public Port
friend class PioPort;
};
+ /** Number of timing requests that are emulating the device timing before
+ * attempting to end up on the bus.
+ */
+ int outTiming;
+
+ /** If we need to drain, keep the drain event around until we're done
+ * here.*/
+ Event *drainEvent;
+
/** Schedule a sendTiming() event to be called in the future. */
void sendTiming(Packet *pkt, Tick time)
- { new PioPort::SendEvent(this, pkt, time); }
+ { outTiming++; new PioPort::SendEvent(this, pkt, time); }
/** This function is notification that the device should attempt to send a
* packet again. */
virtual void recvRetry();
public:
- PioPort(PioDevice *dev, Platform *p, std::string pname = "-pioport");
+ PioPort(PioDevice *dev, System *s, std::string pname = "-pioport");
+
+ unsigned int drain(Event *de);
friend class PioPort::SendEvent;
};
@@ -147,13 +158,20 @@ class DmaPort : public Port
DmaDevice *device;
std::list<Packet*> transmitList;
- /** The platform that device/port are in. This is used to select which mode
+ /** The system that device/port are in. This is used to select which mode
* we are currently operating in. */
- Platform *platform;
+ System *sys;
/** Number of outstanding packets the dma port has. */
int pendingCount;
+ /** If a dmaAction is in progress. */
+ int actionInProgress;
+
+ /** If we need to drain, keep the drain event around until we're done
+ * here.*/
+ Event *drainEvent;
+
virtual bool recvTiming(Packet *pkt);
virtual Tick recvAtomic(Packet *pkt)
{ panic("dma port shouldn't be used for pio access."); }
@@ -171,13 +189,14 @@ class DmaPort : public Port
void sendDma(Packet *pkt, bool front = false);
public:
- DmaPort(DmaDevice *dev, Platform *p);
+ DmaPort(DmaDevice *dev, System *s);
void dmaAction(Packet::Command cmd, Addr addr, int size, Event *event,
uint8_t *data = NULL);
bool dmaPending() { return pendingCount > 0; }
+ unsigned int drain(Event *de);
};
/**
@@ -196,6 +215,8 @@ class PioDevice : public MemObject
* transaction we should perform. */
Platform *platform;
+ System *sys;
+
/** The pioPort that handles the requests for us and provides us requests
* that it sees. */
PioPort *pioPort;
@@ -240,20 +261,22 @@ class PioDevice : public MemObject
const Params *params() const { return _params; }
PioDevice(Params *p)
- : MemObject(p->name), platform(p->platform), pioPort(NULL),
- _params(p)
+ : MemObject(p->name), platform(p->platform), sys(p->system),
+ pioPort(NULL), _params(p)
{}
virtual ~PioDevice();
virtual void init();
+ virtual unsigned int drain(Event *de);
+
virtual Port *getPort(const std::string &if_name, int idx = -1)
{
if (if_name == "pio") {
if (pioPort != NULL)
panic("pio port already connected to.");
- pioPort = new PioPort(this, params()->platform);
+ pioPort = new PioPort(this, sys);
return pioPort;
} else
return NULL;
@@ -310,17 +333,19 @@ class DmaDevice : public PioDevice
bool dmaPending() { return dmaPort->dmaPending(); }
+ virtual unsigned int drain(Event *de);
+
virtual Port *getPort(const std::string &if_name, int idx = -1)
{
if (if_name == "pio") {
if (pioPort != NULL)
panic("pio port already connected to.");
- pioPort = new PioPort(this, params()->platform);
+ pioPort = new PioPort(this, sys);
return pioPort;
} else if (if_name == "dma") {
if (dmaPort != NULL)
panic("dma port already connected to.");
- dmaPort = new DmaPort(this, params()->platform);
+ dmaPort = new DmaPort(this, sys);
return dmaPort;
} else
return NULL;
diff --git a/src/dev/ns_gige.cc b/src/dev/ns_gige.cc
index 179a2c62d..bf2279d93 100644
--- a/src/dev/ns_gige.cc
+++ b/src/dev/ns_gige.cc
@@ -1377,7 +1377,7 @@ NSGigE::doRxDmaRead()
assert(rxDmaState == dmaIdle || rxDmaState == dmaReadWaiting);
rxDmaState = dmaReading;
- if (dmaPending())
+ if (dmaPending() || getState() != Running)
rxDmaState = dmaReadWaiting;
else
dmaRead(rxDmaAddr, rxDmaLen, &rxDmaReadEvent, (uint8_t*)rxDmaData);
@@ -1408,7 +1408,7 @@ NSGigE::doRxDmaWrite()
assert(rxDmaState == dmaIdle || rxDmaState == dmaWriteWaiting);
rxDmaState = dmaWriting;
- if (dmaPending())
+ if (dmaPending() || getState() != Running)
rxDmaState = dmaWriteWaiting;
else
dmaWrite(rxDmaAddr, rxDmaLen, &rxDmaWriteEvent, (uint8_t*)rxDmaData);
@@ -1826,7 +1826,7 @@ NSGigE::doTxDmaRead()
assert(txDmaState == dmaIdle || txDmaState == dmaReadWaiting);
txDmaState = dmaReading;
- if (dmaPending())
+ if (dmaPending() || getState() != Running)
txDmaState = dmaReadWaiting;
else
dmaRead(txDmaAddr, txDmaLen, &txDmaReadEvent, (uint8_t*)txDmaData);
@@ -1857,7 +1857,7 @@ NSGigE::doTxDmaWrite()
assert(txDmaState == dmaIdle || txDmaState == dmaWriteWaiting);
txDmaState = dmaWriting;
- if (dmaPending())
+ if (dmaPending() || getState() != Running)
txDmaState = dmaWriteWaiting;
else
dmaWrite(txDmaAddr, txDmaLen, &txDmaWriteEvent, (uint8_t*)txDmaData);
@@ -2406,6 +2406,20 @@ NSGigE::recvPacket(EthPacketPtr packet)
return true;
}
+
+void
+NSGigE::resume()
+{
+ SimObject::resume();
+
+ // During drain we could have left the state machines in a waiting state and
+ // they wouldn't get out until some other event occured to kick them.
+ // This way they'll get out immediately
+ txKick();
+ rxKick();
+}
+
+
//=====================================================================
//
//
diff --git a/src/dev/ns_gige.hh b/src/dev/ns_gige.hh
index ea7243777..080c0b1f3 100644
--- a/src/dev/ns_gige.hh
+++ b/src/dev/ns_gige.hh
@@ -391,6 +391,8 @@ class NSGigE : public PciDev
virtual void serialize(std::ostream &os);
virtual void unserialize(Checkpoint *cp, const std::string &section);
+ virtual void resume();
+
public:
void regStats();
diff --git a/src/dev/pcidev.cc b/src/dev/pcidev.cc
index 62a7324ad..e81e0d1ee 100644
--- a/src/dev/pcidev.cc
+++ b/src/dev/pcidev.cc
@@ -56,8 +56,8 @@ using namespace std;
PciDev::PciConfigPort::PciConfigPort(PciDev *dev, int busid, int devid,
int funcid, Platform *p)
- : PioPort(dev,p,"-pciconf"), device(dev), busId(busid), deviceId(devid),
- functionId(funcid)
+ : PioPort(dev,p->system,"-pciconf"), device(dev), platform(p),
+ busId(busid), deviceId(devid), functionId(funcid)
{
configAddr = platform->calcConfigAddr(busId, deviceId, functionId);
}
@@ -132,6 +132,18 @@ PciDev::init()
PioDevice::init();
}
+unsigned int
+PciDev::drain(Event *de)
+{
+ unsigned int count;
+ count = pioPort->drain(de) + dmaPort->drain(de) + configPort->drain(de);
+ if (count)
+ changeState(Draining);
+ else
+ changeState(Drained);
+ return count;
+}
+
Tick
PciDev::readConfig(Packet *pkt)
{
diff --git a/src/dev/pcidev.hh b/src/dev/pcidev.hh
index 20ab9364a..847fb07d0 100644
--- a/src/dev/pcidev.hh
+++ b/src/dev/pcidev.hh
@@ -95,6 +95,8 @@ class PciDev : public DmaDevice
virtual void getDeviceAddressRanges(AddrRangeList &resp, AddrRangeList &snoop);
+ Platform *platform;
+
int busId;
int deviceId;
int functionId;
@@ -249,6 +251,9 @@ class PciDev : public DmaDevice
*/
virtual void unserialize(Checkpoint *cp, const std::string &section);
+
+ virtual unsigned int drain(Event *de);
+
virtual Port *getPort(const std::string &if_name, int idx = -1)
{
if (if_name == "config") {
diff --git a/src/dev/sinic.cc b/src/dev/sinic.cc
index dddda1f1c..815cecca5 100644
--- a/src/dev/sinic.cc
+++ b/src/dev/sinic.cc
@@ -921,7 +921,7 @@ Device::rxKick()
break;
case rxBeginCopy:
- if (dmaPending())
+ if (dmaPending() || getState() != Running)
goto exit;
rxDmaAddr = params()->platform->pciToDma(
@@ -1109,7 +1109,7 @@ Device::txKick()
break;
case txBeginCopy:
- if (dmaPending())
+ if (dmaPending() || getState() != Running)
goto exit;
txDmaAddr = params()->platform->pciToDma(
@@ -1287,6 +1287,18 @@ Device::recvPacket(EthPacketPtr packet)
return true;
}
+void
+Device::resume()
+{
+ SimObject::resume();
+
+ // During drain we could have left the state machines in a waiting state and
+ // they wouldn't get out until some other event occured to kick them.
+ // This way they'll get out immediately
+ txKick();
+ rxKick();
+}
+
//=====================================================================
//
//
diff --git a/src/dev/sinic.hh b/src/dev/sinic.hh
index f6c229039..eece4ba6b 100644
--- a/src/dev/sinic.hh
+++ b/src/dev/sinic.hh
@@ -266,6 +266,7 @@ class Device : public Base
public:
virtual Tick read(Packet *pkt);
virtual Tick write(Packet *pkt);
+ virtual void resume();
void prepareIO(int cpu, int index);
void prepareRead(int cpu, int index);
diff --git a/src/python/m5/config.py b/src/python/m5/config.py
index 8291e1e1b..8eed28dcc 100644
--- a/src/python/m5/config.py
+++ b/src/python/m5/config.py
@@ -547,8 +547,7 @@ class SimObject(object):
count = 0
# ParamContexts don't serialize
if isinstance(self, SimObject) and not isinstance(self, ParamContext):
- if not self._ccObject.drain(drain_event):
- count = 1
+ count += self._ccObject.drain(drain_event)
if recursive:
for child in self._children.itervalues():
count += child.startDrain(drain_event, True)
@@ -561,7 +560,7 @@ class SimObject(object):
child.resume()
def changeTiming(self, mode):
- if isinstance(self, SimObject) and not isinstance(self, ParamContext):
+ if isinstance(self, System):
self._ccObject.setMemoryMode(mode)
for child in self._children.itervalues():
child.changeTiming(mode)
diff --git a/src/python/m5/objects/BaseCPU.py b/src/python/m5/objects/BaseCPU.py
index 2e78578df..5bf98be9c 100644
--- a/src/python/m5/objects/BaseCPU.py
+++ b/src/python/m5/objects/BaseCPU.py
@@ -6,10 +6,10 @@ class BaseCPU(SimObject):
abstract = True
mem = Param.MemObject("memory")
+ system = Param.System(Parent.any, "system object")
if build_env['FULL_SYSTEM']:
dtb = Param.AlphaDTB("Data TLB")
itb = Param.AlphaITB("Instruction TLB")
- system = Param.System(Parent.any, "system object")
cpu_id = Param.Int(-1, "CPU identifier")
else:
workload = VectorParam.Process("processes to run")
diff --git a/src/sim/sim_object.cc b/src/sim/sim_object.cc
index a0278dba0..d12b06b7a 100644
--- a/src/sim/sim_object.cc
+++ b/src/sim/sim_object.cc
@@ -72,7 +72,7 @@ SimObject::SimObject(Params *p)
doRecordEvent = !Stats::event_ignore.match(name());
simObjectList.push_back(this);
- state = Atomic;
+ state = Running;
}
//
@@ -88,7 +88,7 @@ SimObject::SimObject(const string &_name)
doRecordEvent = !Stats::event_ignore.match(name());
simObjectList.push_back(this);
- state = Atomic;
+ state = Running;
}
void
@@ -269,38 +269,23 @@ SimObject::recordEvent(const std::string &stat)
Stats::recordEvent(stat);
}
-bool
+unsigned int
SimObject::drain(Event *drain_event)
{
- if (state != DrainedAtomic && state != Atomic) {
- panic("Must implement your own drain function if it is to be used "
- "in timing mode!");
- }
- state = DrainedAtomic;
- return true;
+ state = Drained;
+ return 0;
}
void
SimObject::resume()
{
- if (state == DrainedAtomic) {
- state = Atomic;
- } else if (state == DrainedTiming) {
- state = Timing;
- }
+ state = Running;
}
void
SimObject::setMemoryMode(State new_mode)
{
- assert(new_mode == Timing || new_mode == Atomic);
- if (state == DrainedAtomic && new_mode == Timing) {
- state = DrainedTiming;
- } else if (state == DrainedTiming && new_mode == Atomic) {
- state = DrainedAtomic;
- } else {
- state = new_mode;
- }
+ panic("setMemoryMode() should only be called on systems");
}
void
diff --git a/src/sim/sim_object.hh b/src/sim/sim_object.hh
index 7ecc00958..38f2bdd23 100644
--- a/src/sim/sim_object.hh
+++ b/src/sim/sim_object.hh
@@ -60,16 +60,15 @@ class SimObject : public Serializable, protected StartupCallback
};
enum State {
- Atomic,
- Timing,
+ Running,
Draining,
- DrainedAtomic,
- DrainedTiming
+ Drained
};
+ private:
+ State state;
protected:
Params *_params;
- State state;
void changeState(State new_state) { state = new_state; }
@@ -116,8 +115,10 @@ class SimObject : public Serializable, protected StartupCallback
// Methods to drain objects in order to take checkpoints
// Or switch from timing -> atomic memory model
- // Drain returns false if the SimObject cannot drain immediately.
- virtual bool drain(Event *drain_event);
+ // Drain returns 0 if the simobject can drain immediately or
+ // the number of times the drain_event's process function will be called
+ // before the object will be done draining. Normally this should be 1
+ virtual unsigned int drain(Event *drain_event);
virtual void resume();
virtual void setMemoryMode(State new_mode);
virtual void switchOut();
diff --git a/src/sim/system.cc b/src/sim/system.cc
index 89e7b8542..2780d0fda 100644
--- a/src/sim/system.cc
+++ b/src/sim/system.cc
@@ -143,6 +143,14 @@ int rgdb_wait = -1;
#endif // FULL_SYSTEM
+
+void
+System::setMemoryMode(MemoryMode mode)
+{
+ assert(getState() == Drained);
+ memoryMode = mode;
+}
+
int
System::registerThreadContext(ThreadContext *tc, int id)
{
diff --git a/src/sim/system.hh b/src/sim/system.hh
index 059dc92dc..77777aed4 100644
--- a/src/sim/system.hh
+++ b/src/sim/system.hh
@@ -61,6 +61,21 @@ class RemoteGDB;
class System : public SimObject
{
public:
+ enum MemoryMode {
+ Invalid=0,
+ Atomic,
+ Timing
+ };
+
+
+ MemoryMode getMemoryMode() { assert(memoryMode); return memoryMode; }
+
+ /** Change the memory mode of the system. This should only be called by the
+ * python!!
+ * @param mode Mode to change to (atomic/timing)
+ */
+ void setMemoryMode(MemoryMode mode);
+
PhysicalMemory *physmem;
PCEventQueue pcEventQueue;
@@ -108,6 +123,8 @@ class System : public SimObject
protected:
+ MemoryMode memoryMode;
+
#if FULL_SYSTEM
/**
* Fix up an address used to match PCs for hooking simulator
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-30 18:00:25 +0000