fastmodel: export wake request ports from GIC

Change-Id: I561ef876a4e873501ed2e9775b5bdb59707521a9
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/54783
Reviewed-by: Gabe Black <gabe.black@gmail.com>
Maintainer: Gabe Black <gabe.black@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

src/arch/arm/fastmodel/GIC/FastModelGIC.py

@@ -41,6 +41,7 @@ from m5.SimObject import SimObject
 
 from m5.objects.FastModel import AmbaInitiatorSocket, AmbaTargetSocket
 from m5.objects.Gic import BaseGic
+from m5.objects.IntPin import VectorIntSourcePin
 from m5.objects.SystemC import SystemC_ScModule
 
 GICV3_COMMS_TARGET_ROLE = 'GICV3 COMMS TARGET'
@@ -473,6 +474,8 @@ class FastModelGIC(BaseGic):
     redistributor = VectorGicv3CommsInitiatorSocket(
             'GIC communication initiator')
 
+    wake_request = VectorIntSourcePin('GIC wake request initiator')
+
     # Used for DTB autogeneration
     _state = FdtState(addr_cells=2, size_cells=2, interrupt_cells=3)
 

src/arch/arm/fastmodel/GIC/GIC.lisa

@@ -53,6 +53,9 @@ component GIC
         // For the CPU interface.
         gic.redistributor_m => self.redistributor;
 
+        // Outgoing wake requests.
+        gic.wake_request => self.wake_request;
+
         // Internal ports for PPI and SPI programmatic access.
         self.ppi_0 => gic.ppi_in_0;
         self.ppi_1 => gic.ppi_in_1;
@@ -324,6 +327,8 @@ component GIC
 
     master port<GICv3Comms> redistributor[256];
 
+    master port<Signal> wake_request[256];
+
     #define setPPI(C) \
           case C: ppi_##C[num].setValue(state); \
           break

src/arch/arm/fastmodel/GIC/GIC.sgproj

@@ -16,6 +16,7 @@ config "gcc"
     SIMGEN_COMMAND_LINE = "--num-comps-file 50";
     TARGET_MAXVIEW = "0";
     TARGET_SYSTEMC = "1";
+    TARGET_SYSTEMC_AUTO = "1";
 }
 files
 {

src/arch/arm/fastmodel/GIC/gic.cc

@@ -77,6 +77,12 @@ SCGIC::SCGIC(const SCFastModelGICParams &params,
 {
     signalInterrupt.bind(signal_interrupt);
 
+    for (int i = 0; i < wake_request.size(); i++) {
+        wakeRequests.emplace_back(
+            new SignalReceiver(csprintf("%s.wakerequest[%d]", name(), i)));
+        wake_request[i].bind(wakeRequests[i]->signal_in);
+    }
+
     set_parameter("gic.enabled", params.enabled);
     set_parameter("gic.has-gicv3", params.has_gicv3);
     set_parameter("gic.has-gicv4.1", params.has_gicv4_1);
@@ -306,7 +312,18 @@ GIC::GIC(const FastModelGICParams &params) :
     ambaS(params.sc_gic->amba_s, params.name + ".amba_s", -1),
     redistributors(params.port_redistributor_connection_count),
     scGIC(params.sc_gic)
-{}
+{
+    for (int i = 0; i < params.port_wake_request_connection_count; i++) {
+        wakeRequestPorts.emplace_back(new IntSourcePin<GIC>(
+            csprintf("%s.wakerequestport[%d]", name(), i), i, this));
+        auto handler = [this, i](bool status)
+        {
+            auto &port = wakeRequestPorts[i];
+            status ? port->raise() : port->lower();
+        };
+        scGIC->wakeRequests[i]->onChange(handler);
+    }
+}
 
 Port &
 GIC::getPort(const std::string &if_name, PortID idx)
@@ -323,6 +340,8 @@ GIC::getPort(const std::string &if_name, PortID idx)
                                                    name(), idx), idx));
         }
         return *ptr;
+    } else if (if_name == "wake_request") {
+        return *wakeRequestPorts.at(idx);
     } else {
         return BaseGic::getPort(if_name, idx);
     }

src/arch/arm/fastmodel/GIC/gic.hh

@@ -36,7 +36,9 @@
 #include <memory>
 
 #include "arch/arm/fastmodel/amba_ports.hh"
+#include "arch/arm/fastmodel/common/signal_receiver.hh"
 #include "dev/arm/base_gic.hh"
+#include "dev/intpin.hh"
 #include "params/FastModelGIC.hh"
 #include "params/SCFastModelGIC.hh"
 #include "scx_evs_GIC.h"
@@ -92,6 +94,8 @@ class SCGIC : public scx_evs_GIC
 
     SignalInterruptInitiatorSocket signalInterrupt;
 
+    std::vector<std::unique_ptr<SignalReceiver>> wakeRequests;
+
     void before_end_of_elaboration() override;
 
     void
@@ -118,6 +122,7 @@ class GIC : public BaseGic
     AmbaInitiator ambaM;
     AmbaTarget ambaS;
     std::vector<std::unique_ptr<TlmGicInitiator>> redistributors;
+    std::vector<std::unique_ptr<IntSourcePin<GIC>>> wakeRequestPorts;
 
     SCGIC *scGIC;