kernel: memory: Add MemoryLayout class, to build physical memory layout.

1 files changed, 73 insertions, 0 deletions

diff --git a/src/core/hle/kernel/memory/memory_layout.h b/src/core/hle/kernel/memory/memory_layout.h
new file mode 100644
index 000000000..830c6f0d7
--- /dev/null
+++ b/src/core/hle/kernel/memory/memory_layout.h
@@ -0,0 +1,73 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_types.h"
+
+namespace Kernel::Memory {
+
+class MemoryRegion final {
+    friend class MemoryLayout;
+
+public:
+    constexpr PAddr StartAddress() const {
+        return start_address;
+    }
+
+    constexpr PAddr EndAddress() const {
+        return end_address;
+    }
+
+private:
+    constexpr MemoryRegion() = default;
+    constexpr MemoryRegion(PAddr start_address, PAddr end_address)
+        : start_address{start_address}, end_address{end_address} {}
+
+    const PAddr start_address{};
+    const PAddr end_address{};
+};
+
+class MemoryLayout final {
+public:
+    constexpr const MemoryRegion& Application() const {
+        return application;
+    }
+
+    constexpr const MemoryRegion& Applet() const {
+        return applet;
+    }
+
+    constexpr const MemoryRegion& System() const {
+        return system;
+    }
+
+    static constexpr MemoryLayout GetDefaultLayout() {
+        constexpr std::size_t application_size{0xcd500000};
+        constexpr std::size_t applet_size{0x1fb00000};
+        constexpr PAddr application_start_address{Core::DramMemoryMap::End - application_size};
+        constexpr PAddr application_end_address{Core::DramMemoryMap::End};
+        constexpr PAddr applet_start_address{application_start_address - applet_size};
+        constexpr PAddr applet_end_address{applet_start_address + applet_size};
+        constexpr PAddr system_start_address{Core::DramMemoryMap::SlabHeapEnd};
+        constexpr PAddr system_end_address{applet_start_address};
+        return {application_start_address, application_end_address, applet_start_address,
+                applet_end_address,        system_start_address,    system_end_address};
+    }
+
+private:
+    constexpr MemoryLayout(PAddr application_start_address, std::size_t application_size,
+                           PAddr applet_start_address, std::size_t applet_size,
+                           PAddr system_start_address, std::size_t system_size)
+        : application{application_start_address, application_size},
+          applet{applet_start_address, applet_size}, system{system_start_address, system_size} {}
+
+    const MemoryRegion application;
+    const MemoryRegion applet;
+    const MemoryRegion system;
+
+    const PAddr start_address{};
+};
+
+} // namespace Kernel::Memory