fastmodel: Mostly collapse ARM base classes for the CortexA76 CPU.

Fast models are in practice only ARM, so it's not that helpful to have
the ARM-ness factored out. It is, however, helpful to have aspects
which control how gem5 concepts like registers are mapped to fast model
concepts like resources, especially since these mappings may vary from
fast model to fast model.

For instance, it looks like the CortexA76 does not have predicate
vector registers. Rather than make all fast models support or not
support those registers, that can be done on a model by model basis.

Change-Id: I195da4a2f4d2f8593032d0d63e9fd3d20a240d01
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/23786
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com>

12 files changed, 34 insertions, 324 deletions

diff --git a/src/arch/arm/fastmodel/CortexA76/FastModelCortexA76.py b/src/arch/arm/fastmodel/CortexA76/FastModelCortexA76.py
index c1b996e54..4a0c2a362 100644
--- a/src/arch/arm/fastmodel/CortexA76/FastModelCortexA76.py
+++ b/src/arch/arm/fastmodel/CortexA76/FastModelCortexA76.py
@@ -32,17 +32,17 @@ from m5.SimObject import SimObject
 from m5.objects.ArmInterrupts import ArmInterrupts
 from m5.objects.ArmISA import ArmISA
 from m5.objects.FastModel import AmbaInitiatorSocket, AmbaTargetSocket
-from m5.objects.FastModelArch import FastModelArmCPU
 from m5.objects.FastModelGIC import Gicv3CommsTargetSocket
 from m5.objects.Gic import ArmPPI
+from m5.objects.Iris import IrisBaseCPU
 from m5.objects.SystemC import SystemC_ScModule
 
-class FastModelCortexA76(FastModelArmCPU):
+class FastModelCortexA76(IrisBaseCPU):
     type = 'FastModelCortexA76'
     cxx_class = 'FastModel::CortexA76'
     cxx_header = 'arch/arm/fastmodel/CortexA76/cortex_a76.hh'
 
-    cntfrq = 0x1800000
+    cntfrq = Param.UInt64(0x1800000, "Value for the CNTFRQ timer register")
 
     # We shouldn't need these, but gem5 gets mad without them.
     interrupts = [ ArmInterrupts() ]
diff --git a/src/arch/arm/fastmodel/CortexA76/cortex_a76.cc b/src/arch/arm/fastmodel/CortexA76/cortex_a76.cc
index 0b50f30e4..cd0435937 100644
--- a/src/arch/arm/fastmodel/CortexA76/cortex_a76.cc
+++ b/src/arch/arm/fastmodel/CortexA76/cortex_a76.cc
@@ -29,7 +29,6 @@
 
 #include "arch/arm/fastmodel/CortexA76/cortex_a76.hh"
 
-#include "arch/arm/fastmodel/arm/cpu.hh"
 #include "arch/arm/fastmodel/iris/cpu.hh"
 #include "base/logging.hh"
 #include "dev/arm/base_gic.hh"
@@ -40,6 +39,13 @@ namespace FastModel
 {
 
 void
+CortexA76::initState()
+{
+    for (auto *tc : threadContexts)
+        tc->setMiscRegNoEffect(ArmISA::MISCREG_CNTFRQ_EL0, params().cntfrq);
+}
+
+void
 CortexA76::setCluster(CortexA76Cluster *_cluster, int _num)
 {
     cluster = _cluster;
@@ -91,7 +97,7 @@ CortexA76::getPort(const std::string &if_name, PortID idx)
     if (if_name == "redistributor")
         return cluster->getEvs()->gem5_getPort(if_name, num);
     else
-        return ArmCPU::getPort(if_name, idx);
+        return Base::getPort(if_name, idx);
 }
 
 CortexA76Cluster::CortexA76Cluster(Params &p) :
diff --git a/src/arch/arm/fastmodel/CortexA76/cortex_a76.hh b/src/arch/arm/fastmodel/CortexA76/cortex_a76.hh
index c003c7944..168842051 100644
--- a/src/arch/arm/fastmodel/CortexA76/cortex_a76.hh
+++ b/src/arch/arm/fastmodel/CortexA76/cortex_a76.hh
@@ -31,7 +31,8 @@
 #define __ARCH_ARM_FASTMODEL_CORTEXA76_CORETEX_A76_HH__
 
 #include "arch/arm/fastmodel/amba_ports.hh"
-#include "arch/arm/fastmodel/arm/cpu.hh"
+#include "arch/arm/fastmodel/iris/arm/thread_context.hh"
+#include "arch/arm/fastmodel/iris/cpu.hh"
 #include "params/FastModelCortexA76.hh"
 #include "params/FastModelCortexA76Cluster.hh"
 #include "scx/scx.h"
@@ -50,10 +51,11 @@ namespace FastModel
 // the work.
 class CortexA76Cluster;
 
-class CortexA76 : public ArmCPU
+class CortexA76 : public Iris::CPU<Iris::ArmThreadContext>
 {
   protected:
     typedef FastModelCortexA76Params Params;
+    typedef Iris::CPU<Iris::ArmThreadContext> Base;
     const Params &_params;
 
     CortexA76Cluster *cluster = nullptr;
@@ -62,7 +64,24 @@ class CortexA76 : public ArmCPU
     const Params &params() { return _params; }
 
   public:
-    CortexA76(Params &p) : ArmCPU(&p), _params(p) {}
+    CortexA76(Params &p) : Base(&p, scx::scx_get_iris_connection_interface()),
+        _params(p)
+    {}
+
+    void
+    clockPeriodUpdated() override
+    {
+        Base::clockPeriodUpdated();
+
+        // FIXME(b/139447397): this is a workaround since CNTFRQ_EL0 should not
+        // be modified after clock is changed in real hardwares. Remove or
+        // modify this after a more reasonable solution is found.
+        for (auto *tc : threadContexts) {
+            tc->setMiscRegNoEffect(ArmISA::MISCREG_CNTFRQ_EL0, frequency());
+        }
+    }
+
+    void initState() override;
 
     template <class T>
     void set_evs_param(const std::string &n, T val);
diff --git a/src/arch/arm/fastmodel/CortexA76/evs.cc b/src/arch/arm/fastmodel/CortexA76/evs.cc
index ed5f555ea..27f63649f 100644
--- a/src/arch/arm/fastmodel/CortexA76/evs.cc
+++ b/src/arch/arm/fastmodel/CortexA76/evs.cc
@@ -30,7 +30,7 @@
 #include "arch/arm/fastmodel/CortexA76/evs.hh"
 
 #include "arch/arm/fastmodel/CortexA76/cortex_a76.hh"
-#include "arch/arm/fastmodel/arm/cpu.hh"
+#include "arch/arm/fastmodel/iris/cpu.hh"
 #include "base/logging.hh"
 #include "dev/arm/base_gic.hh"
 #include "sim/core.hh"
diff --git a/src/arch/arm/fastmodel/arm/FastModelArch.py b/src/arch/arm/fastmodel/arm/FastModelArch.py
deleted file mode 100644
index b2869563f..000000000
--- a/src/arch/arm/fastmodel/arm/FastModelArch.py
+++ /dev/null
@@ -1,38 +0,0 @@
-# Copyright 2019 Google, Inc.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met: redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer;
-# redistributions in binary form must reproduce the above copyright
-# notice, this list of conditions and the following disclaimer in the
-# documentation and/or other materials provided with the distribution;
-# neither the name of the copyright holders nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-#
-# Authors: Gabe Black
-
-from m5.params import *
-from m5.proxy import *
-
-from m5.objects.IrisArch import IrisArmCPU
-
-class FastModelArmCPU(IrisArmCPU):
-    type = 'FastModelArmCPU'
-    cxx_class = 'FastModel::ArmCPU'
-    cxx_header = 'arch/arm/fastmodel/arm/cpu.hh'
-
-    cntfrq = Param.UInt64("Value for the CNTFRQ timer register")
diff --git a/src/arch/arm/fastmodel/arm/SConscript b/src/arch/arm/fastmodel/arm/SConscript
deleted file mode 100644
index e312b62b4..000000000
--- a/src/arch/arm/fastmodel/arm/SConscript
+++ /dev/null
@@ -1,34 +0,0 @@
-# Copyright 2019 Google, Inc.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met: redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer;
-# redistributions in binary form must reproduce the above copyright
-# notice, this list of conditions and the following disclaimer in the
-# documentation and/or other materials provided with the distribution;
-# neither the name of the copyright holders nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-#
-# Authors: Gabe Black
-
-Import('*')
-
-if not env['USE_ARM_FASTMODEL'] or env['TARGET_ISA'] != 'arm':
-    Return()
-
-SimObject('FastModelArch.py')
-Source('cpu.cc')
diff --git a/src/arch/arm/fastmodel/arm/cpu.cc b/src/arch/arm/fastmodel/arm/cpu.cc
deleted file mode 100644
index c87c2ac5f..000000000
--- a/src/arch/arm/fastmodel/arm/cpu.cc
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- * Copyright 2019 Google, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met: redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer;
- * redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution;
- * neither the name of the copyright holders nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * Authors: Gabe Black
- */
-
-#include "arch/arm/fastmodel/arm/cpu.hh"
-
-#include "scx/scx_iris.h"
-
-namespace FastModel
-{
-
-ArmCPU::ArmCPU(FastModelArmCPUParams *params) :
-    Iris::ArmCPU(params, scx::scx_get_iris_connection_interface())
-{
-}
-
-void
-ArmCPU::initState()
-{
-    auto cntfrq = static_cast<const FastModelArmCPUParams *>(params())->cntfrq;
-    for (auto *tc : threadContexts)
-        tc->setMiscRegNoEffect(ArmISA::MISCREG_CNTFRQ_EL0, cntfrq);
-}
-
-} // namespace FastModel
-
-FastModel::ArmCPU *
-FastModelArmCPUParams::create()
-{
-    return new FastModel::ArmCPU(this);
-}
diff --git a/src/arch/arm/fastmodel/arm/cpu.hh b/src/arch/arm/fastmodel/arm/cpu.hh
deleted file mode 100644
index 379174ec3..000000000
--- a/src/arch/arm/fastmodel/arm/cpu.hh
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
- * Copyright 2019 Google, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met: redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer;
- * redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution;
- * neither the name of the copyright holders nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * Authors: Gabe Black
- */
-
-#ifndef __ARCH_ARM_FASTMODEL_ARM_CPU_HH__
-#define __ARCH_ARM_FASTMODEL_ARM_CPU_HH__
-
-#include "arch/arm/fastmodel/iris/arm/cpu.hh"
-#include "params/FastModelArmCPU.hh"
-
-namespace FastModel
-{
-
-// This class adds non-Iris, gem5 functionality to this CPU model.
-class ArmCPU : public Iris::ArmCPU
-{
-  public:
-    ArmCPU(FastModelArmCPUParams *params);
-
-    void initState() override;
-};
-
-} // namespace FastModel
-
-#endif // __ARCH_ARM_FASTMODEL_ARM_CPU_HH__
diff --git a/src/arch/arm/fastmodel/iris/arm/IrisArch.py b/src/arch/arm/fastmodel/iris/arm/IrisArch.py
deleted file mode 100644
index 4d2856f99..000000000
--- a/src/arch/arm/fastmodel/iris/arm/IrisArch.py
+++ /dev/null
@@ -1,37 +0,0 @@
-# Copyright 2019 Google, Inc.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met: redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer;
-# redistributions in binary form must reproduce the above copyright
-# notice, this list of conditions and the following disclaimer in the
-# documentation and/or other materials provided with the distribution;
-# neither the name of the copyright holders nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-#
-# Authors: Gabe Black
-
-from m5.params import *
-from m5.proxy import *
-
-from m5.objects.Iris import IrisBaseCPU
-
-class IrisArmCPU(IrisBaseCPU):
-    type = 'IrisArmCPU'
-    abstract=True
-    cxx_class = 'Iris::ArmCPU'
-    cxx_header = "arch/arm/fastmodel/iris/arm/cpu.hh"
diff --git a/src/arch/arm/fastmodel/iris/arm/SConscript b/src/arch/arm/fastmodel/iris/arm/SConscript
index a8cb24be3..b32dc6d36 100644
--- a/src/arch/arm/fastmodel/iris/arm/SConscript
+++ b/src/arch/arm/fastmodel/iris/arm/SConscript
@@ -30,6 +30,4 @@ Import('*')
 if not env['USE_ARM_FASTMODEL'] or env['TARGET_ISA'] != 'arm':
     Return()
 
-SimObject('IrisArch.py')
-
 Source('thread_context.cc')
diff --git a/src/arch/arm/fastmodel/iris/arm/cpu.cc b/src/arch/arm/fastmodel/iris/arm/cpu.cc
deleted file mode 100644
index 7ffafc3cc..000000000
--- a/src/arch/arm/fastmodel/iris/arm/cpu.cc
+++ /dev/null
@@ -1,36 +0,0 @@
-/*
- * Copyright 2019 Google, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met: redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer;
- * redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution;
- * neither the name of the copyright holders nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * Authors: Gabe Black
- */
-
-#include "arch/arm/fastmodel/iris/arm/cpu.hh"
-
-Iris::ArmCPU *
-IrisCPUParams::create()
-{
-    return new Iris::ArmCPU(this);
-}
diff --git a/src/arch/arm/fastmodel/iris/arm/cpu.hh b/src/arch/arm/fastmodel/iris/arm/cpu.hh
deleted file mode 100644
index 8abbbba61..000000000
--- a/src/arch/arm/fastmodel/iris/arm/cpu.hh
+++ /dev/null
@@ -1,62 +0,0 @@
-/*
- * Copyright 2019 Google, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met: redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer;
- * redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution;
- * neither the name of the copyright holders nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * Authors: Gabe Black
- */
-
-#ifndef __ARCH_ARM_FASTMODEL_IRIS_ARM_CPU_HH__
-#define __ARCH_ARM_FASTMODEL_IRIS_ARM_CPU_HH__
-
-#include "arch/arm/fastmodel/iris/arm/thread_context.hh"
-#include "arch/arm/fastmodel/iris/cpu.hh"
-
-namespace Iris
-{
-
-// This class specializes the generic Iris CPU template to use the Arm
-// Iris ThreadContext.
-class ArmCPU : public CPU<ArmThreadContext>
-{
-  public:
-    using CPU<ArmThreadContext>::CPU;
-
-    void
-    clockPeriodUpdated() override
-    {
-        CPU<ArmThreadContext>::clockPeriodUpdated();
-
-        // FIXME(b/139447397): this is a workaround since CNTFRQ_EL0 should not
-        // be modified after clock is changed in real hardwares. Remove or
-        // modify this after a more reasonable solution is found.
-        for (auto *tc : threadContexts) {
-            tc->setMiscRegNoEffect(ArmISA::MISCREG_CNTFRQ_EL0, frequency());
-        }
-    }
-};
-
-} // namespace Iris
-
-#endif // __ARCH_ARM_FASTMODEL_IRIS_ARM_CPU_HH__