From 7671b1f0e4790b43bb8f8747b63cd44b7a65e10f Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@ost.ch>
Date: Mon, 27 Oct 2025 13:58:55 +0000
Subject: x86_64: move kapi implementation to src

---
 arch/x86_64/src/kapi/memory.cpp | 66 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 arch/x86_64/src/kapi/memory.cpp

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

diff --git a/arch/x86_64/src/kapi/memory.cpp b/arch/x86_64/src/kapi/memory.cpp
new file mode 100644
index 0000000..d1c1f03
--- /dev/null
+++ b/arch/x86_64/src/kapi/memory.cpp
@@ -0,0 +1,66 @@
+#include "kapi/memory.hpp"
+
+#include "kapi/system.hpp"
+
+#include "x86_64/boot/boot.hpp"
+#include "x86_64/boot/ld.hpp"
+#include "x86_64/memory/address.hpp"
+#include "x86_64/memory/region_allocator.hpp"
+
+#include <multiboot2/information.hpp>
+
+#include <atomic>
+
+namespace teachos::memory
+{
+  using namespace x86_64::memory;
+  using namespace x86_64::boot;
+
+  namespace
+  {
+    auto constinit is_initialized = std::atomic_flag{};
+
+    auto create_memory_information() -> region_allocator::memory_information
+    {
+      auto const & mbi = multiboot_information_pointer.get();
+      auto map = mbi->memory_map();
+
+      return {std::make_pair(physical_address{&_start_physical}, physical_address{&_end_physical}),
+              std::make_pair(physical_address{std::bit_cast<std::byte *>(&mbi)},
+                             physical_address{std::bit_cast<std::byte *>(&mbi) + mbi->size_bytes()}),
+              map};
+    };
+  }  // namespace
+
+  auto init() -> void
+  {
+    if (is_initialized.test_and_set())
+    {
+      system::panic("[x86_64] Memory management has already been initialized.");
+    }
+
+    auto memory_map = multiboot_information_pointer->maybe_memory_map();
+    if (!memory_map)
+    {
+      system::panic("[x86_64] No memory map available.");
+    }
+
+    auto mem_info = create_memory_information();
+    auto allocator = region_allocator{mem_info};
+
+    static_cast<void>(allocator);
+
+    // kernel::cpu::set_cr0_bit(kernel::cpu::cr0_flags::WRITE_PROTECT);
+    // kernel::cpu::set_efer_bit(kernel::cpu::efer_flags::NXE);
+
+    // paging::kernel_mapper kernel(allocator, memory_information);
+    // kernel.remap_kernel();
+    // video::vga::text::write("Kernel remapping successful", video::vga::text::common_attributes::green_on_black);
+    // video::vga::text::newline();
+
+    // remap_heap(heap::KERNEL_HEAP_START, heap::KERNEL_HEAP_SIZE);
+    // video::vga::text::write("Heap remapping successful", video::vga::text::common_attributes::green_on_black);
+    // video::vga::text::newline();
+  }
+
+}  // namespace teachos::memory
-- 
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