Merge pull request #436 from bunnei/multi-core

Initial support for multi-core

1 files changed, 78 insertions, 0 deletions

diff --git a/src/core/core_cpu.h b/src/core/core_cpu.h
new file mode 100644
index 000000000..243f0b5e7
--- /dev/null
+++ b/src/core/core_cpu.h
@@ -0,0 +1,78 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <atomic>
+#include <condition_variable>
+#include <memory>
+#include <mutex>
+#include <string>
+#include "common/common_types.h"
+
+class ARM_Interface;
+
+namespace Kernel {
+class Scheduler;
+}
+
+namespace Core {
+
+constexpr unsigned NUM_CPU_CORES{4};
+
+class CpuBarrier {
+public:
+    bool IsAlive() const {
+        return !end;
+    }
+
+    void NotifyEnd();
+
+    bool Rendezvous();
+
+private:
+    unsigned cores_waiting{NUM_CPU_CORES};
+    std::mutex mutex;
+    std::condition_variable condition;
+    std::atomic<bool> end{};
+};
+
+class Cpu {
+public:
+    Cpu(std::shared_ptr<CpuBarrier> cpu_barrier, size_t core_index);
+
+    void RunLoop(bool tight_loop = true);
+
+    void SingleStep();
+
+    void PrepareReschedule();
+
+    ARM_Interface& ArmInterface() {
+        return *arm_interface;
+    }
+
+    const ARM_Interface& ArmInterface() const {
+        return *arm_interface;
+    }
+
+    const std::shared_ptr<Kernel::Scheduler>& Scheduler() const {
+        return scheduler;
+    }
+
+    bool IsMainCore() const {
+        return core_index == 0;
+    }
+
+private:
+    void Reschedule();
+
+    std::shared_ptr<ARM_Interface> arm_interface;
+    std::shared_ptr<CpuBarrier> cpu_barrier;
+    std::shared_ptr<Kernel::Scheduler> scheduler;
+
+    bool reschedule_pending{};
+    size_t core_index;
+};
+
+} // namespace Core