arch-riscv: Remove static parts of AMOs out of ISA

This patch removes the static parts of the RISC-V atomic memory
instructions out of the ISA generated code and into arch/riscv/insts. It
also makes the LR and SC instructions subclasses of MemInst from
arch/riscv/insts/mem.hh.

Change-Id: I6591f3d171045c4f1b457eb1264bbb7bd62b3e51
Reviewed-on: https://gem5-review.googlesource.com/6025
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Alec Roelke <ar4jc@virginia.edu>

3 files changed, 167 insertions, 0 deletions

diff --git a/src/arch/riscv/insts/SConscript b/src/arch/riscv/insts/SConscript
index 8bedc7b73..ad504e2f8 100644
--- a/src/arch/riscv/insts/SConscript
+++ b/src/arch/riscv/insts/SConscript
@@ -1,6 +1,7 @@
 Import('*')
 
 if env['TARGET_ISA'] == 'riscv':
+    Source('amo.cc')
     Source('mem.cc')
     Source('standard.cc')
     Source('static_inst.cc')
\ No newline at end of file
diff --git a/src/arch/riscv/insts/amo.cc b/src/arch/riscv/insts/amo.cc
new file mode 100644
index 000000000..7f5740f14
--- /dev/null
+++ b/src/arch/riscv/insts/amo.cc
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2015 RISC-V Foundation
+ * Copyright (c) 2017 The University of Virginia
+ * All rights reserved.
+ *
+ * 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: Alec Roelke
+ */
+
+#include "arch/riscv/insts/amo.hh"
+
+#include <sstream>
+#include <string>
+
+#include "arch/riscv/utility.hh"
+#include "cpu/exec_context.hh"
+#include "cpu/static_inst.hh"
+
+using namespace std;
+
+namespace RiscvISA
+{
+
+string LoadReserved::generateDisassembly(Addr pc,
+    const SymbolTable *symtab) const
+{
+    stringstream ss;
+    ss << mnemonic << ' ' << registerName(_destRegIdx[0]) << ", ("
+            << registerName(_srcRegIdx[0]) << ')';
+    return ss.str();
+}
+
+string StoreCond::generateDisassembly(Addr pc,
+    const SymbolTable *symtab) const
+{
+    stringstream ss;
+    ss << mnemonic << ' ' << registerName(_destRegIdx[0]) << ", "
+            << registerName(_srcRegIdx[1]) << ", ("
+            << registerName(_srcRegIdx[0]) << ')';
+    return ss.str();
+}
+
+string AtomicMemOp::generateDisassembly(Addr pc,
+    const SymbolTable *symtab) const
+{
+    stringstream ss;
+    ss << mnemonic << ' ' << registerName(_destRegIdx[0]) << ", "
+            << registerName(_srcRegIdx[1]) << ", ("
+            << registerName(_srcRegIdx[0]) << ')';
+    return ss.str();
+}
+
+string AtomicMemOpMicro::generateDisassembly(Addr pc,
+    const SymbolTable *symtab) const
+{
+    stringstream ss;
+    ss << csprintf("0x%08x", machInst) << ' ' << mnemonic;
+    return ss.str();
+}
+
+}
\ No newline at end of file
diff --git a/src/arch/riscv/insts/amo.hh b/src/arch/riscv/insts/amo.hh
new file mode 100644
index 000000000..7c07bc243
--- /dev/null
+++ b/src/arch/riscv/insts/amo.hh
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2015 RISC-V Foundation
+ * Copyright (c) 2017 The University of Virginia
+ * All rights reserved.
+ *
+ * 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: Alec Roelke
+ */
+
+#ifndef __ARCH_RISCV_INSTS_AMO_HH__
+#define __ARCH_RISCV_INSTS_AMO_HH__
+
+#include <string>
+
+#include "arch/riscv/insts/mem.hh"
+#include "arch/riscv/insts/static_inst.hh"
+#include "cpu/static_inst.hh"
+
+namespace RiscvISA
+{
+
+class LoadReserved : public MemInst
+{
+  protected:
+    using MemInst::MemInst;
+
+    std::string generateDisassembly(
+        Addr pc, const SymbolTable *symtab) const override;
+};
+
+class StoreCond : public MemInst
+{
+  protected:
+    using MemInst::MemInst;
+
+    std::string generateDisassembly(
+        Addr pc, const SymbolTable *symtab) const override;
+};
+
+class AtomicMemOp : public RiscvMacroInst
+{
+  protected:
+    using RiscvMacroInst::RiscvMacroInst;
+
+    std::string generateDisassembly(
+        Addr pc, const SymbolTable *symtab) const override;
+};
+
+class AtomicMemOpMicro : public RiscvMicroInst
+{
+  protected:
+    Request::Flags memAccessFlags;
+    using RiscvMicroInst::RiscvMicroInst;
+
+    std::string generateDisassembly(
+        Addr pc, const SymbolTable *symtab) const override;
+};
+
+}
+
+#endif // __ARCH_RISCV_INSTS_AMO_HH__
\ No newline at end of file