core: hle: kernel: Add KPageTableManager.

src/core/CMakeLists.txt

@@ -224,6 +224,7 @@ add_library(core STATIC
     hle/kernel/k_page_group.h
     hle/kernel/k_page_table.cpp
     hle/kernel/k_page_table.h
+    hle/kernel/k_page_table_manager.h
     hle/kernel/k_page_table_slab_heap.h
     hle/kernel/k_port.cpp
     hle/kernel/k_port.h

src/core/hle/kernel/k_page_table_manager.h

@@ -0,0 +1,55 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <atomic>
+
+#include "common/common_types.h"
+#include "core/hle/kernel/k_dynamic_resource_manager.h"
+#include "core/hle/kernel/k_page_table_slab_heap.h"
+
+namespace Kernel {
+
+class KPageTableManager : public KDynamicResourceManager<impl::PageTablePage, true> {
+public:
+    using RefCount = KPageTableSlabHeap::RefCount;
+    static constexpr size_t PageTableSize = KPageTableSlabHeap::PageTableSize;
+
+public:
+    KPageTableManager() = default;
+
+    void Initialize(KDynamicPageManager* page_allocator, KPageTableSlabHeap* pt_heap) {
+        m_pt_heap = pt_heap;
+
+        static_assert(std::derived_from<KPageTableSlabHeap, DynamicSlabType>);
+        BaseHeap::Initialize(page_allocator, pt_heap);
+    }
+
+    VAddr Allocate() {
+        return VAddr(BaseHeap::Allocate());
+    }
+
+    RefCount GetRefCount(VAddr addr) const {
+        return m_pt_heap->GetRefCount(addr);
+    }
+
+    void Open(VAddr addr, int count) {
+        return m_pt_heap->Open(addr, count);
+    }
+
+    bool Close(VAddr addr, int count) {
+        return m_pt_heap->Close(addr, count);
+    }
+
+    bool IsInPageTableHeap(VAddr addr) const {
+        return m_pt_heap->IsInRange(addr);
+    }
+
+private:
+    using BaseHeap = KDynamicResourceManager<impl::PageTablePage, true>;
+
+    KPageTableSlabHeap* m_pt_heap{};
+};
+
+} // namespace Kernel