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-rw-r--r--src/mem/ruby/slicc_interface/AbstractController.hh3
-rw-r--r--src/mem/ruby/system/Sequencer.cc6
-rw-r--r--src/mem/slicc/symbols/StateMachine.cc105
3 files changed, 98 insertions, 16 deletions
diff --git a/src/mem/ruby/slicc_interface/AbstractController.hh b/src/mem/ruby/slicc_interface/AbstractController.hh
index 3a93cc745..329730ffd 100644
--- a/src/mem/ruby/slicc_interface/AbstractController.hh
+++ b/src/mem/ruby/slicc_interface/AbstractController.hh
@@ -4,6 +4,7 @@
#include "mem/ruby/common/Consumer.hh"
#include "mem/protocol/MachineType.hh"
+#include "mem/ruby/common/Address.hh"
class MessageBuffer;
class Network;
@@ -20,6 +21,8 @@ public:
virtual const string toString() const = 0; // returns text version of controller type
virtual const string getName() const = 0; // return instance name
virtual const MachineType getMachineType() const = 0;
+ virtual void set_atomic(Address addr) = 0;
+ virtual void clear_atomic() = 0;
virtual void print(ostream & out) const = 0;
virtual void printStats(ostream & out) const = 0;
diff --git a/src/mem/ruby/system/Sequencer.cc b/src/mem/ruby/system/Sequencer.cc
index cd079cdc3..eb3430b7f 100644
--- a/src/mem/ruby/system/Sequencer.cc
+++ b/src/mem/ruby/system/Sequencer.cc
@@ -274,6 +274,12 @@ void Sequencer::writeCallback(const Address& address, DataBlock& data) {
if (request->ruby_request.type == RubyRequestType_Locked_Read) {
m_dataCache_ptr->setLocked(address, m_version);
}
+ else if (request->ruby_request.type == RubyRequestType_RMW_Read) {
+ m_controller->set_atomic(address);
+ }
+ else if (request->ruby_request.type == RubyRequestType_RMW_Write) {
+ m_controller->clear_atomic();
+ }
hitCallback(request, data);
}
diff --git a/src/mem/slicc/symbols/StateMachine.cc b/src/mem/slicc/symbols/StateMachine.cc
index 7bc84ffe0..99c1953a1 100644
--- a/src/mem/slicc/symbols/StateMachine.cc
+++ b/src/mem/slicc/symbols/StateMachine.cc
@@ -290,6 +290,8 @@ void StateMachine::printControllerH(ostream& out, string component)
out << " void print(ostream& out) const;" << endl;
out << " void printConfig(ostream& out) const;" << endl;
out << " void wakeup();" << endl;
+ out << " void set_atomic(Address addr);" << endl;
+ out << " void clear_atomic();" << endl;
out << " void printStats(ostream& out) const { s_profiler.dumpStats(out); }" << endl;
out << " void clearStats() { s_profiler.clearStats(); }" << endl;
out << "private:" << endl;
@@ -300,7 +302,11 @@ void StateMachine::printControllerH(ostream& out, string component)
}
if (strncmp(component.c_str(), "L1Cache", 7) == 0) {
out << " bool servicing_atomic;" << endl;
- out << " Address locked_read_request;" << endl;
+ out << " Address locked_read_request1;" << endl;
+ out << " Address locked_read_request2;" << endl;
+ out << " Address locked_read_request3;" << endl;
+ out << " Address locked_read_request4;" << endl;
+ out << " int read_counter;" << endl;
}
out << " int m_number_of_TBEs;" << endl;
@@ -410,7 +416,11 @@ void StateMachine::printControllerC(ostream& out, string component)
out << "{ " << endl;
if (strncmp(component.c_str(), "L1Cache", 7) == 0) {
out << " servicing_atomic = false;" << endl;
- out << " locked_read_request = Address(-1);" << endl;
+ out << " locked_read_request1 = Address(-1);" << endl;
+ out << " locked_read_request2 = Address(-1);" << endl;
+ out << " locked_read_request3 = Address(-1);" << endl;
+ out << " locked_read_request4 = Address(-1);" << endl;
+ out << " read_counter = 0;" << endl;
}
out << " m_num_controllers++; " << endl;
for(int i=0; i < numObjects(); i++) {
@@ -717,7 +727,7 @@ void StateMachine::printControllerC(ostream& out, string component)
string c_code_string = action.lookupPair("c_code");
// add here:
- if (strncmp(component.c_str(), "L1Cache", 7) == 0) {
+ if (0/*strncmp(component.c_str(), "L1Cache", 7) == 0*/) {
if (c_code_string.find("writeCallback") != string::npos) {
string::size_type pos = c_code_string.find("(((*m_L1Cache_sequencer_ptr)).writeCallback");
assert(pos != string::npos);
@@ -798,43 +808,67 @@ void StateMachine::printCWakeup(ostream& out, string component)
string::size_type pos = output.find("TransitionResult result = doTransition((L1Cache_mandatory_request_type_to_event(((*in_msg_ptr)).m_Type)), L1Cache_getState(addr), addr);");
assert(pos != string::npos);
string atomics_string = "\n \
- bool postpone = false; \n \
if ((((*in_msg_ptr)).m_Type) == CacheRequestType_ATOMIC) { \n \
if (!servicing_atomic) { \n \
- if (locked_read_request == Address(-1)) { \n \
- locked_read_request = addr; \n \
+ if (locked_read_request1 == Address(-1)) { \n \
+ assert(read_counter == 0); \n \
+ locked_read_request1 = addr; \n \
+ read_counter++; \n \
} \n \
- else if (addr == locked_read_request) { \n \
+ else if (addr == locked_read_request1) { \n \
; // do nothing \n\
} \n \
else { \n \
assert(0); // should never be here if servicing one request at a time \n\
} \n \
} \n \
- else if (addr != locked_read_request) { \n \
- // this is probably caused by shift optimizations \n \
- locked_read_request = addr; \n\
+ else if (addr != locked_read_request1) { \n \
+ if (locked_read_request2 == Address(-1)) { \n \
+ assert(read_counter == 1); \n \
+ locked_read_request2 = addr; \n \
+ read_counter++; \n \
+ } \n \
+ else if (locked_read_request3 == Address(-1)) { \n \
+ assert(read_counter == 2); \n \
+ locked_read_request3 = addr; \n \
+ read_counter++; \n \
+ } \n \
+ else if (locked_read_request4 == Address(-1)) { \n \
+ assert(read_counter == 3); \n \
+ locked_read_request4 = addr; \n \
+ read_counter++; \n \
+ } \n \
+ else { \n \
+ // reached limit of addresses that could be locked \n \
+ // this can happen if there are multiple optimized consequtive shifts \n \
+ assert(0); \n \
+ } \n \
} \n \
} \n \
else { \n \
- if (locked_read_request != Address(-1)) { \n \
- locked_read_request = Address(-1); \n \
+ // if an atomic is followed by non-atomic, reset -> shift optimization \n \
+ // remove this and assert(0) once shifts are resolved \n \
+ if (locked_read_request1 != Address(-1)) { \n \
+ locked_read_request1 = Address(-1); \n \
+ locked_read_request2 = Address(-1); \n \
+ locked_read_request3 = Address(-1); \n \
+ locked_read_request4 = Address(-1); \n \
servicing_atomic = false; \n \
+ read_counter = 0; \n \
} \n \
} \n \
- if (!postpone) { \n \
";
output.insert(pos, atomics_string);
- string foo = "// Cannot do anything with this transition, go check next doable transition (mostly likely of next port)\n";
+ /*string foo = "// Cannot do anything with this transition, go check next doable transition (mostly likely of next port)\n";
string::size_type next_pos = output.find(foo, pos);
next_pos = next_pos + foo.length();
assert(next_pos != string::npos);
string complete = " }\n";
- output.insert(next_pos, complete);
+ output.insert(next_pos, complete);*/
//out << port->lookupPair("c_code_in_port");
out << output;
out << endl;
@@ -849,7 +883,10 @@ void StateMachine::printCWakeup(ostream& out, string component)
out << " if ((((*m_L1Cache_forwardToCache_ptr)).isReady())) {" << endl;
out << " const RequestMsg* in_msg_ptr;" << endl;
out << " in_msg_ptr = dynamic_cast<const RequestMsg*>(((*m_L1Cache_forwardToCache_ptr)).peek());" << endl;
- out << " if ((servicing_atomic && locked_read_request == ((*in_msg_ptr)).m_Address)) {" << endl;
+ out << " if ((servicing_atomic && (locked_read_request1 == ((*in_msg_ptr)).m_Address) || " << endl;
+ out << " (locked_read_request2 == ((*in_msg_ptr)).m_Address) || (locked_read_request3 == ((*in_msg_ptr)).m_Address) || " << endl;
+ out << " (locked_read_request4 == ((*in_msg_ptr)).m_Address))) { " << endl;
+
out << " postpone = true;" << endl;
out << " }" << endl;
out << " }" << endl;
@@ -876,6 +913,42 @@ void StateMachine::printCWakeup(ostream& out, string component)
// out << " DEBUG_NEWLINE(GENERATED_COMP, MedPrio);" << endl;
out << "}" << endl;
out << endl;
+
+
+ // tack on two more functions
+ if (strncmp(component.c_str(), "L1Cache", 7) == 0) {
+ out << "void " << component << "_Controller::set_atomic(Address addr)" << endl;
+ out << "{" << endl;
+ out << " if (!servicing_atomic) { " << endl;
+ out << " assert(addr == locked_read_request1); " << endl;
+ out << " servicing_atomic = true; " << endl;
+ out << " }" << endl;
+ out << "}" << endl;
+ out << "void " << component << "_Controller::clear_atomic()" << endl;
+ out << "{" << endl;
+ out << " assert(servicing_atomic); " << endl;
+ out << " read_counter--; " << endl;
+ out << " if (read_counter == 0) { " << endl;
+ out << " servicing_atomic = false; " << endl;
+ out << " locked_read_request1 = Address(-1); " << endl;
+ out << " locked_read_request2 = Address(-1); " << endl;
+ out << " locked_read_request3 = Address(-1); " << endl;
+ out << " locked_read_request4 = Address(-1); " << endl;
+ out << " } " << endl;
+ out << "}" << endl;
+ }
+ else {
+ out << "void " << component << "_Controller::set_atomic(Address addr)" << endl;
+ out << "{" << endl;
+ out << " assert(0); " << endl;
+ out << "}" << endl;
+
+ out << "void " << component << "_Controller::clear_atomic()" << endl;
+ out << "{" << endl;
+ out << " assert(0); " << endl;
+ out << "}" << endl;
+ }
+
}
void StateMachine::printCSwitch(ostream& out, string component)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-14 20:53:23 +0000