x86_64: extract linker script interface header

2 files changed, 41 insertions, 6 deletions

diff --git a/arch/x86_64/include/x86_64/boot/ld.hpp b/arch/x86_64/include/x86_64/boot/ld.hpp
new file mode 100644
index 0000000..e6b397b
--- /dev/null
+++ b/arch/x86_64/include/x86_64/boot/ld.hpp
@@ -0,0 +1,22 @@
+#ifndef TEACHOS_X86_64_BOOT_LD_H
+#define TEACHOS_X86_64_BOOT_LD_H
+
+#include <cstddef>
+
+extern "C"
+{
+  namespace teachos::x86_64::boot
+  {
+    /**
+     * @brief The first byte of the loaded kernel image.
+     */
+    extern "C" std::byte _start_linear;
+
+    /**
+     * @brief The first byte after the loaded kernel image.
+     */
+    extern "C" std::byte _end_linear;
+  }  // namespace teachos::x86_64::boot
+}
+
+#endif
diff --git a/arch/x86_64/src/memory.cpp b/arch/x86_64/src/memory.cpp
index a31627b..105d69b 100644
--- a/arch/x86_64/src/memory.cpp
+++ b/arch/x86_64/src/memory.cpp
@@ -3,22 +3,33 @@
 #include "kern/error.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>
 
-// extern "C" teachos::arch::asm_pointer<multiboot2::information_view> multiboot_information_pointer;
-
 namespace teachos::arch::memory
 {
+  using namespace x86_64::memory;
+  using namespace x86_64::boot;
+
   namespace
   {
     auto constinit is_initialized = std::atomic_flag{};
 
-    // auto create_memory_information() -> x86_64::memory::region_allocator::memory_information {
+    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_linear}, physical_address{&_end_linear}),
+              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
@@ -34,8 +45,10 @@ namespace teachos::arch::memory
       teachos::panic("[x86_64] No memory map available.");
     }
 
-    // auto mem_info = x86_64::memory::region_allocator::memory_information{};
-    // auto allocator = x86_64::memory::region_allocator{mem_info};
+    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);