CPU: Check that the interrupt controller is created when needed

This patch adds a creation-time check to the CPU to ensure that the
interrupt controller is created for the cases where it is needed,
i.e. if the CPU is not being switched in later and not a checker CPU.

The patch also adds the "createInterruptController" call to a number
of the regression scripts.

src/cpu/base.cc

@@ -118,7 +118,7 @@ CPUProgressEvent::description() const
     return "CPU Progress";
 }
 
-BaseCPU::BaseCPU(Params *p)
+BaseCPU::BaseCPU(Params *p, bool is_checker)
     : MemObject(p), clock(p->clock), instCnt(0), _cpuId(p->cpu_id),
       _instMasterId(p->system->getMasterId(name() + ".inst")),
       _dataMasterId(p->system->getMasterId(name() + ".data")),
@@ -219,10 +219,17 @@ BaseCPU::BaseCPU(Params *p)
             schedule(event, p->function_trace_start);
         }
     }
-    // Check if CPU model has interrupts connected. The CheckerCPU
-    // cannot take interrupts directly for example.
-    if (interrupts)
-        interrupts->setCPU(this);
+
+    // The interrupts should always be present unless this CPU is
+    // switched in later or in case it is a checker CPU
+    if (!params()->defer_registration && !is_checker) {
+        if (interrupts) {
+            interrupts->setCPU(this);
+        } else {
+            fatal("CPU %s has no interrupt controller.\n"
+                  "Ensure createInterruptController() is called.\n", name());
+        }
+    }
 
     if (FullSystem) {
         profileEvent = NULL;

src/cpu/base.hh

@@ -302,7 +302,7 @@ class BaseCPU : public MemObject
     typedef BaseCPUParams Params;
     const Params *params() const
     { return reinterpret_cast<const Params *>(_params); }
-    BaseCPU(Params *params);
+    BaseCPU(Params *params, bool is_checker = false);
     virtual ~BaseCPU();
 
     virtual void init();

src/cpu/checker/cpu.cc

@@ -64,7 +64,7 @@ CheckerCPU::init()
 }
 
 CheckerCPU::CheckerCPU(Params *p)
-    : BaseCPU(p), thread(NULL), tc(NULL)
+    : BaseCPU(p, true), thread(NULL), tc(NULL)
 {
     memReq = NULL;
     curStaticInst = NULL;

src/cpu/inorder/cpu.cc

@@ -387,6 +387,12 @@ InOrderCPU::InOrderCPU(Params *params)
 
     }
 
+    // InOrderCPU always requires an interrupt controller.
+    if (!params->defer_registration && !interrupts) {
+        fatal("InOrderCPU %s has no interrupt controller.\n"
+              "Ensure createInterruptController() is called.\n", name());
+    }
+
     dummyReqInst = new InOrderDynInst(this, NULL, 0, 0, 0);
     dummyReqInst->setSquashed();
     dummyReqInst->resetInstCount();

src/cpu/o3/cpu.cc

@@ -460,6 +460,12 @@ FullO3CPU<Impl>::FullO3CPU(DerivO3CPUParams *params)
         this->threadContexts.push_back(tc);
     }
 
+    // FullO3CPU always requires an interrupt controller.
+    if (!params->defer_registration && !interrupts) {
+        fatal("FullO3CPU %s has no interrupt controller.\n"
+              "Ensure createInterruptController() is called.\n", name());
+    }
+
     for (ThreadID tid = 0; tid < this->numThreads; tid++)
         this->thread[tid]->setFuncExeInst(0);
 

tests/configs/inorder-timing.py

@@ -52,6 +52,8 @@ system = System(cpu = cpu,
                 membus = Bus())
 system.system_port = system.membus.slave
 system.physmem.port = system.membus.master
+# create the interrupt controller
+cpu.createInterruptController()
 cpu.connectAllPorts(system.membus)
 
 root = Root(full_system = False, system = system)

tests/configs/o3-timing-mp-ruby.py

@@ -40,6 +40,8 @@ ruby_memory = ruby_config.generate("TwoLevel_SplitL1UnifiedL2.rb", nb_cores)
 system = System(cpu = cpus, physmem = ruby_memory, membus = Bus())
 
 for cpu in cpus:
+    # create the interrupt controller
+    cpu.createInterruptController()
     cpu.connectAllPorts(system.membus)
     cpu.clock = '2GHz'
 

tests/configs/o3-timing-mp.py

@@ -71,6 +71,8 @@ system.l2c.mem_side = system.membus.slave
 for cpu in cpus:
     cpu.addPrivateSplitL1Caches(L1(size = '32kB', assoc = 1),
                                 L1(size = '32kB', assoc = 4))
+    # create the interrupt controller
+    cpu.createInterruptController()
     # connect cpu level-1 caches to shared level-2 cache
     cpu.connectAllPorts(system.toL2Bus, system.membus)
     cpu.clock = '2GHz'

tests/configs/o3-timing-ruby.py

@@ -41,6 +41,8 @@ system = System(cpu = cpu,
                 physmem = ruby_memory,
                 membus = Bus())
 system.physmem.port = system.membus.master
+# create the interrupt controller
+cpu.createInterruptController()
 cpu.connectAllPorts(system.membus)
 
 # Connect the system port for loading of binaries etc

tests/configs/o3-timing.py

@@ -52,6 +52,8 @@ system = System(cpu = cpu,
                 membus = Bus())
 system.system_port = system.membus.slave
 system.physmem.port = system.membus.master
+# create the interrupt controller
+cpu.createInterruptController()
 cpu.connectAllPorts(system.membus)
 
 root = Root(full_system = False, system = system)

tests/configs/pc-o3-timing.py

@@ -104,6 +104,8 @@ cpu.addPrivateSplitL1Caches(L1(size = '32kB', assoc = 1),
                             L1(size = '32kB', assoc = 4),
                             PageTableWalkerCache(),
                             PageTableWalkerCache())
+# create the interrupt controller
+cpu.createInterruptController()
 # connect cpu level-1 caches to shared level-2 cache
 cpu.connectAllPorts(system.toL2Bus, system.membus)
 cpu.clock = '2GHz'

tests/configs/pc-simple-atomic.py

@@ -106,6 +106,8 @@ cpu.addPrivateSplitL1Caches(L1(size = '32kB', assoc = 1),
                             L1(size = '32kB', assoc = 4),
                             PageTableWalkerCache(),
                             PageTableWalkerCache())
+# create the interrupt controller
+cpu.createInterruptController()
 # connect cpu level-1 caches to shared level-2 cache
 cpu.connectAllPorts(system.toL2Bus, system.membus)
 cpu.clock = '2GHz'

tests/configs/pc-simple-timing.py

@@ -106,6 +106,8 @@ cpu.addPrivateSplitL1Caches(L1(size = '32kB', assoc = 1),
                             L1(size = '32kB', assoc = 4),
                             PageTableWalkerCache(),
                             PageTableWalkerCache())
+# create the interrupt controller
+cpu.createInterruptController()
 # connect cpu level-1 caches to shared level-2 cache
 cpu.connectAllPorts(system.toL2Bus, system.membus)
 cpu.clock = '2GHz'

tests/configs/realview-o3-dual.py

@@ -88,6 +88,8 @@ system.l2c.mem_side = system.membus.slave
 for c in cpus:
     c.addPrivateSplitL1Caches(L1(size = '32kB', assoc = 1),
                                 L1(size = '32kB', assoc = 4))
+    # create the interrupt controller
+    c.createInterruptController()
     # connect cpu level-1 caches to shared level-2 cache
     c.connectAllPorts(system.toL2Bus, system.membus)
     c.clock = '2GHz'

tests/configs/realview-o3.py

@@ -88,6 +88,8 @@ system.l2c.mem_side = system.membus.slave
 #connect up the cpu and l1s
 cpu.addPrivateSplitL1Caches(L1(size = '32kB', assoc = 1),
                             L1(size = '32kB', assoc = 4))
+# create the interrupt controller
+cpu.createInterruptController()
 # connect cpu level-1 caches to shared level-2 cache
 cpu.connectAllPorts(system.toL2Bus, system.membus)
 cpu.clock = '2GHz'

tests/configs/realview-simple-atomic-dual.py

@@ -88,6 +88,8 @@ system.l2c.mem_side = system.membus.slave
 for c in cpus:
     c.addPrivateSplitL1Caches(L1(size = '32kB', assoc = 1),
                                 L1(size = '32kB', assoc = 4))
+    # create the interrupt controller
+    c.createInterruptController()
     # connect cpu level-1 caches to shared level-2 cache
     c.connectAllPorts(system.toL2Bus, system.membus)
     c.clock = '2GHz'

tests/configs/realview-simple-atomic.py

@@ -86,6 +86,8 @@ system.l2c.mem_side = system.membus.slave
 #connect up the cpu and l1s
 cpu.addPrivateSplitL1Caches(L1(size = '32kB', assoc = 1),
                             L1(size = '32kB', assoc = 4))
+# create the interrupt controller
+cpu.createInterruptController()
 # connect cpu level-1 caches to shared level-2 cache
 cpu.connectAllPorts(system.toL2Bus, system.membus)
 cpu.clock = '2GHz'

tests/configs/realview-simple-timing-dual.py

@@ -88,6 +88,8 @@ system.l2c.mem_side = system.membus.slave
 for c in cpus:
     c.addPrivateSplitL1Caches(L1(size = '32kB', assoc = 1),
                                 L1(size = '32kB', assoc = 4))
+    # create the interrupt controller
+    c.createInterruptController()
     # connect cpu level-1 caches to shared level-2 cache
     c.connectAllPorts(system.toL2Bus, system.membus)
     c.clock = '2GHz'

tests/configs/realview-simple-timing.py

@@ -88,6 +88,8 @@ system.l2c.mem_side = system.membus.slave
 #connect up the cpu and l1s
 cpu.addPrivateSplitL1Caches(L1(size = '32kB', assoc = 1),
                             L1(size = '32kB', assoc = 4))
+# create the interrupt controller
+cpu.createInterruptController()
 # connect cpu level-1 caches to shared level-2 cache
 cpu.connectAllPorts(system.toL2Bus, system.membus)
 cpu.clock = '2GHz'

tests/configs/simple-atomic-mp.py

@@ -70,6 +70,8 @@ system.l2c.mem_side = system.membus.slave
 for cpu in cpus:
     cpu.addPrivateSplitL1Caches(L1(size = '32kB', assoc = 1),
                                 L1(size = '32kB', assoc = 4))
+    # create the interrupt controller
+    cpu.createInterruptController()
     # connect cpu level-1 caches to shared level-2 cache
     cpu.connectAllPorts(system.toL2Bus, system.membus)
     cpu.clock = '2GHz'

tests/configs/simple-atomic.py

@@ -34,6 +34,8 @@ system = System(cpu = AtomicSimpleCPU(cpu_id=0),
                 membus = Bus())
 system.system_port = system.membus.slave
 system.physmem.port = system.membus.master
+# create the interrupt controller
+system.cpu.createInterruptController()
 system.cpu.connectAllPorts(system.membus)
 system.cpu.clock = '2GHz'
 

tests/configs/simple-timing-mp.py

@@ -70,6 +70,8 @@ system.l2c.mem_side = system.membus.slave
 for cpu in cpus:
     cpu.addPrivateSplitL1Caches(L1(size = '32kB', assoc = 1),
                                 L1(size = '32kB', assoc = 4))
+    # create the interrupt controller
+    cpu.createInterruptController()
     # connect cpu level-1 caches to shared level-2 cache
     cpu.connectAllPorts(system.toL2Bus, system.membus)
     cpu.clock = '2GHz'

tests/configs/simple-timing-ruby.py

@@ -75,6 +75,9 @@ Ruby.create_system(options, system)
 
 assert(len(system.ruby._cpu_ruby_ports) == 1)
 
+# create the interrupt controller
+cpu.createInterruptController()
+
 #
 # Tie the cpu cache ports to the ruby cpu ports and
 # physmem, respectively

tests/configs/simple-timing.py

@@ -48,6 +48,8 @@ system = System(cpu = cpu,
                 membus = Bus())
 system.system_port = system.membus.slave
 system.physmem.port = system.membus.master
+# create the interrupt controller
+cpu.createInterruptController()
 cpu.connectAllPorts(system.membus)
 cpu.clock = '2GHz'
 

tests/configs/tsunami-o3-dual.py

@@ -90,6 +90,8 @@ system.l2c.mem_side = system.membus.slave
 for c in cpus:
     c.addPrivateSplitL1Caches(L1(size = '32kB', assoc = 1),
                                 L1(size = '32kB', assoc = 4))
+    # create the interrupt controller
+    c.createInterruptController()
     # connect cpu level-1 caches to shared level-2 cache
     c.connectAllPorts(system.toL2Bus, system.membus)
     c.clock = '2GHz'

tests/configs/tsunami-o3.py

@@ -89,6 +89,8 @@ system.l2c.mem_side = system.membus.slave
 #connect up the cpu and l1s
 cpu.addPrivateSplitL1Caches(L1(size = '32kB', assoc = 1),
                             L1(size = '32kB', assoc = 4))
+# create the interrupt controller
+cpu.createInterruptController()
 # connect cpu level-1 caches to shared level-2 cache
 cpu.connectAllPorts(system.toL2Bus, system.membus)
 cpu.clock = '2GHz'

tests/configs/tsunami-simple-atomic-dual.py

@@ -88,6 +88,8 @@ system.l2c.mem_side = system.membus.slave
 for c in cpus:
     c.addPrivateSplitL1Caches(L1(size = '32kB', assoc = 1),
                                 L1(size = '32kB', assoc = 4))
+    # create the interrupt controller
+    c.createInterruptController()
     # connect cpu level-1 caches to shared level-2 cache
     c.connectAllPorts(system.toL2Bus, system.membus)
     c.clock = '2GHz'

tests/configs/tsunami-simple-atomic.py

@@ -87,6 +87,8 @@ system.l2c.mem_side = system.membus.slave
 #connect up the cpu and l1s
 cpu.addPrivateSplitL1Caches(L1(size = '32kB', assoc = 1),
                             L1(size = '32kB', assoc = 4))
+# create the interrupt controller
+cpu.createInterruptController()
 # connect cpu level-1 caches to shared level-2 cache
 cpu.connectAllPorts(system.toL2Bus, system.membus)
 cpu.clock = '2GHz'

tests/configs/tsunami-simple-timing-dual.py

@@ -88,6 +88,8 @@ system.l2c.mem_side = system.membus.slave
 for c in cpus:
     c.addPrivateSplitL1Caches(L1(size = '32kB', assoc = 1),
                                 L1(size = '32kB', assoc = 4))
+    # create the interrupt controller
+    c.createInterruptController()
     # connect cpu level-1 caches to shared level-2 cache
     c.connectAllPorts(system.toL2Bus, system.membus)
     c.clock = '2GHz'

tests/configs/tsunami-simple-timing.py

@@ -89,6 +89,8 @@ system.l2c.mem_side = system.membus.slave
 #connect up the cpu and l1s
 cpu.addPrivateSplitL1Caches(L1(size = '32kB', assoc = 1),
                             L1(size = '32kB', assoc = 4))
+# create the interrupt controller
+cpu.createInterruptController()
 # connect cpu level-1 caches to shared level-2 cache
 cpu.connectAllPorts(system.toL2Bus, system.membus)
 cpu.clock = '2GHz'

tests/configs/twosys-tsunami-simple-atomic.py

@@ -35,6 +35,8 @@ from Benchmarks import *
 test_sys = makeLinuxAlphaSystem('atomic',
                                  SysConfig('netperf-stream-client.rcS'))
 test_sys.cpu = AtomicSimpleCPU(cpu_id=0)
+# create the interrupt controller
+test_sys.cpu.createInterruptController()
 test_sys.cpu.connectAllPorts(test_sys.membus)
 # In contrast to the other (one-system) Tsunami configurations we do
 # not have an IO cache but instead rely on an IO bridge for accesses
@@ -47,6 +49,8 @@ test_sys.iobridge.master = test_sys.membus.slave
 drive_sys = makeLinuxAlphaSystem('atomic',
                                  SysConfig('netperf-server.rcS'))
 drive_sys.cpu = AtomicSimpleCPU(cpu_id=0)
+# create the interrupt controller
+drive_sys.cpu.createInterruptController()
 drive_sys.cpu.connectAllPorts(drive_sys.membus)
 drive_sys.iobridge = Bridge(delay='50ns', nack_delay='4ns',
                             ranges = [AddrRange(0, '8GB')])