From c711253798b32c4ef73cf38749ea5cf17a352daa Mon Sep 17 00:00:00 2001
From: bunnei <bunneidev@gmail.com>
Date: Wed, 7 Feb 2018 21:54:35 -0500
Subject: nvdrv: Add MemoryManager class to track GPU memory.

---
 src/core/hle/service/nvdrv/memory_manager.h | 48 +++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 src/core/hle/service/nvdrv/memory_manager.h

(limited to 'src/core/hle/service/nvdrv/memory_manager.h')

diff --git a/src/core/hle/service/nvdrv/memory_manager.h b/src/core/hle/service/nvdrv/memory_manager.h
new file mode 100644
index 000000000..4ba1a3952
--- /dev/null
+++ b/src/core/hle/service/nvdrv/memory_manager.h
@@ -0,0 +1,48 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+#include <memory>
+#include "common/common_types.h"
+#include "core/memory.h"
+
+namespace Service {
+namespace Nvidia {
+
+class MemoryManager final {
+public:
+    MemoryManager() = default;
+
+    PAddr AllocateSpace(u64 size, u64 align);
+    PAddr AllocateSpace(PAddr paddr, u64 size, u64 align);
+    PAddr MapBufferEx(VAddr vaddr, u64 size);
+    PAddr MapBufferEx(VAddr vaddr, PAddr paddr, u64 size);
+    VAddr PhysicalToVirtualAddress(PAddr paddr);
+
+private:
+    boost::optional<PAddr> FindFreeBlock(u64 size, u64 align = 1);
+    bool IsPageMapped(PAddr paddr);
+    VAddr& PageSlot(PAddr paddr);
+
+    enum class PageStatus : u64 {
+        Unmapped = 0xFFFFFFFFFFFFFFFFULL,
+        Allocated = 0xFFFFFFFFFFFFFFFEULL,
+    };
+
+    static constexpr u64 MAX_ADDRESS{0x10000000000ULL};
+    static constexpr u64 PAGE_TABLE_BITS{14};
+    static constexpr u64 PAGE_TABLE_SIZE{1 << PAGE_TABLE_BITS};
+    static constexpr u64 PAGE_TABLE_MASK{PAGE_TABLE_SIZE - 1};
+    static constexpr u64 PAGE_BLOCK_BITS{14};
+    static constexpr u64 PAGE_BLOCK_SIZE{1 << PAGE_BLOCK_BITS};
+    static constexpr u64 PAGE_BLOCK_MASK{PAGE_BLOCK_SIZE - 1};
+
+    using PageBlock = std::array<VAddr, PAGE_BLOCK_SIZE>;
+    std::array<std::unique_ptr<PageBlock>, PAGE_TABLE_SIZE> page_table{};
+};
+
+} // namespace Nvidia
+} // namespace Service
-- 
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