From b9d445bf92725d79269becf978059e040519c00a Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@ost.ch>
Date: Wed, 10 Dec 2025 16:51:44 +0100
Subject: x86_64/memory: implement simple kernel remapper

---
 arch/x86_64/src/memory/page_table.cpp | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'arch/x86_64/src/memory/page_table.cpp')

diff --git a/arch/x86_64/src/memory/page_table.cpp b/arch/x86_64/src/memory/page_table.cpp
index 60bf94d..e797b22 100644
--- a/arch/x86_64/src/memory/page_table.cpp
+++ b/arch/x86_64/src/memory/page_table.cpp
@@ -1,6 +1,7 @@
 #include "x86_64/memory/page_table.hpp"
 
 #include <algorithm>
+#include <utility>
 
 namespace teachos::memory::x86_64
 {
@@ -25,6 +26,18 @@ namespace teachos::memory::x86_64
     return std::bit_cast<flags>(m_raw & ~frame_number_mask);
   }
 
+  auto page_table::entry::all_flags(flags flags) -> void
+  {
+    m_raw = (m_raw & ~frame_number_mask) | std::to_underlying(flags);
+  }
+
+  auto page_table::entry::operator|=(flags rhs) -> page_table::entry &
+  {
+    auto raw_flags = std::to_underlying(rhs) & ~frame_number_mask;
+    m_raw |= raw_flags;
+    return *this;
+  }
+
   auto page_table::entry::frame() const -> std::optional<struct frame>
   {
     if (present())
-- 
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