x86_64: port basic page and page table abstractions

1 files changed, 19 insertions, 0 deletions

diff --git a/arch/x86_64/src/memory/paging_root.cpp b/arch/x86_64/src/memory/paging_root.cpp
new file mode 100644
index 0000000..1234308
--- /dev/null
+++ b/arch/x86_64/src/memory/paging_root.cpp
@@ -0,0 +1,19 @@
+#include "x86_64/memory/paging_root.hpp"
+
+#include <cstdint>
+
+namespace teachos::memory::x86_64
+{
+
+  namespace
+  {
+    constexpr auto PML_RECURSIVE_BASE = std::uintptr_t{0177777'776'776'776'776'0000uz};
+  }
+
+  auto paging_root::get() -> paging_root &
+  {
+    auto pml4_address = std::bit_cast<paging_root *>(PML_RECURSIVE_BASE);
+    return *pml4_address;
+  }
+
+}  // namespace teachos::memory::x86_64
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