Spinlock/exclusive_monitor

Signed-off-by: crueter <crueter@eden-emu.dev>

src/dynarmic/src/dynarmic/CMakeLists.txt

@@ -278,6 +278,7 @@ if ("riscv64" IN_LIST ARCHITECTURE)
         backend/riscv64/emit_riscv64_vector.cpp
         backend/riscv64/emit_riscv64.cpp
         backend/riscv64/emit_riscv64.h
+        backend/riscv64/exclusive_monitor.cpp
         backend/riscv64/reg_alloc.cpp
         backend/riscv64/reg_alloc.h
         backend/riscv64/stack_layout.h
@@ -288,6 +289,8 @@ if ("riscv64" IN_LIST ARCHITECTURE)
         backend/riscv64/a32_interface.cpp
         backend/riscv64/a64_interface.cpp
         backend/riscv64/code_block.h
+
+        common/spin_lock_riscv64.cpp
     )
     message(WARNING "TODO: Incomplete frontend for this host architecture")
 endif()

src/dynarmic/src/dynarmic/backend/riscv64/exclusive_monitor.cpp

@@ -0,0 +1,54 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "dynarmic/interface/exclusive_monitor.h"
+
+#include <algorithm>
+
+namespace Dynarmic {
+
+ExclusiveMonitor::ExclusiveMonitor(std::size_t processor_count)
+        : exclusive_addresses(processor_count, INVALID_EXCLUSIVE_ADDRESS), exclusive_values(processor_count) {}
+
+size_t ExclusiveMonitor::GetProcessorCount() const {
+    return exclusive_addresses.size();
+}
+
+void ExclusiveMonitor::Lock() {
+    lock.Lock();
+}
+
+void ExclusiveMonitor::Unlock() {
+    lock.Unlock();
+}
+
+bool ExclusiveMonitor::CheckAndClear(size_t processor_id, VAddr address) {
+    const VAddr masked_address = address & RESERVATION_GRANULE_MASK;
+
+    Lock();
+    if (exclusive_addresses[processor_id] != masked_address) {
+        Unlock();
+        return false;
+    }
+
+    for (VAddr& other_address : exclusive_addresses) {
+        if (other_address == masked_address) {
+            other_address = INVALID_EXCLUSIVE_ADDRESS;
+        }
+    }
+    return true;
+}
+
+void ExclusiveMonitor::Clear() {
+    Lock();
+    std::fill(exclusive_addresses.begin(), exclusive_addresses.end(), INVALID_EXCLUSIVE_ADDRESS);
+    Unlock();
+}
+
+void ExclusiveMonitor::ClearProcessor(size_t processor_id) {
+    Lock();
+    exclusive_addresses[processor_id] = INVALID_EXCLUSIVE_ADDRESS;
+    Unlock();
+}
+
+}  // namespace Dynarmic

src/dynarmic/src/dynarmic/common/spin_lock_riscv64.cpp

@@ -0,0 +1,13 @@
+#include <mutex>
+
+#include "dynarmic/common/spin_lock.h"
+
+namespace Dynarmic {
+
+void SpinLock::Lock() noexcept {
+}
+
+void SpinLock::Unlock() noexcept {
+}
+
+}  // namespace Dynarmic