7 files changed, 35 insertions, 22 deletions
diff --git a/arch/x86_64/src/context_switching/descriptor_table/global_descriptor_table.cpp b/arch/x86_64/src/context_switching/descriptor_table/global_descriptor_table.cpp
index 1cba13c..ca3d7ff 100644
--- a/arch/x86_64/src/context_switching/descriptor_table/global_descriptor_table.cpp
+++ b/arch/x86_64/src/context_switching/descriptor_table/global_descriptor_table.cpp
@@ -1,9 +1,9 @@
-#include "global_descriptor_table.hpp"
+#include "arch/context_switching/descriptor_table/global_descriptor_table.hpp"
 
+#include "arch/context_switching/descriptor_table/segment_descriptor.hpp"
+#include "arch/kernel/cpu/lgdt.hpp"
 #include "arch/stl/vector.hpp"
 
-#include "segment_descriptor.hpp"
-
 namespace teachos::arch::context_switching::descriptor_table
 {
   auto create_global_descriptor_table() -> global_descriptor_table
@@ -43,15 +43,14 @@ namespace teachos::arch::context_switching::descriptor_table
     return global_descriptor_table;
   }
 
-  auto load_global_descriptor_table(global_descriptor_table_pointer gdt_pointer) -> void
-  {
-    //
-  }
-
   auto initialize_global_descriptor_table() -> global_descriptor_table
   {
     global_descriptor_table gdt{create_global_descriptor_table()};
+
+    // TODO: Second argument does not work yet (because pointer hpp)
     global_descriptor_table_pointer gdt_pointer{gdt.size() - 1, &gdt};
-    load_global_descriptor_table(gdt_pointer);
+    kernel::cpu::load_global_descriptor_table(gdt_pointer);
+
+    return gdt;
   }
 }  // namespace teachos::arch::context_switching::descriptor_table
 \ No newline at end of file
diff --git a/arch/x86_64/src/kernel/cpu/control_register.cpp b/arch/x86_64/src/kernel/cpu/control_register.cpp
index 3051bae..a39a360 100644
--- a/arch/x86_64/src/kernel/cpu/control_register.cpp
+++ b/arch/x86_64/src/kernel/cpu/control_register.cpp
@@ -4,7 +4,7 @@
 
 #include <type_traits>
 
-namespace teachos::arch::memory::cpu
+namespace teachos::arch::kernel::cpu
 {
   auto read_control_register(control_register cr) -> uint64_t
   {
@@ -69,4 +69,4 @@ namespace teachos::arch::memory::cpu
     auto const cr0 = read_control_register(control_register::CR0);
     write_control_register(control_register::CR0, static_cast<std::underlying_type<cr0_flags>::type>(flag) | cr0);
   }
-}  // namespace teachos::arch::memory::cpu
+}  // namespace teachos::arch::kernel::cpu
diff --git a/arch/x86_64/src/kernel/cpu/lgdt.cpp b/arch/x86_64/src/kernel/cpu/lgdt.cpp
new file mode 100644
index 0000000..cb13aa8
--- /dev/null
+++ b/arch/x86_64/src/kernel/cpu/lgdt.cpp
@@ -0,0 +1,14 @@
+#include "arch/kernel/cpu/lgdt.hpp"
+
+#include "arch/context_switching/descriptor_table/global_descriptor_table_pointer.hpp"
+
+namespace teachos::arch::kernel::cpu
+{
+  auto load_global_descriptor_table(context_switching::descriptor_table::global_descriptor_table_pointer gdt_pointer)
+      -> void
+  {
+    // TODO: build lgdt argument from global_descriptor_table_pointer (don't know how yet)
+    asm volatile("lgdt (%0)" : : "r"(gdt_pointer));
+  }
+
+}  // namespace teachos::arch::kernel::cpu
+\ No newline at end of file
diff --git a/arch/x86_64/src/kernel/cpu/msr.cpp b/arch/x86_64/src/kernel/cpu/msr.cpp
index 082bca9..6249f8f 100644
--- a/arch/x86_64/src/kernel/cpu/msr.cpp
+++ b/arch/x86_64/src/kernel/cpu/msr.cpp
@@ -1,6 +1,6 @@
 #include "arch/kernel/cpu/msr.hpp"
 
-namespace teachos::arch::memory::cpu
+namespace teachos::arch::kernel::cpu
 {
   namespace
   {
@@ -28,4 +28,4 @@ namespace teachos::arch::memory::cpu
     auto const efer = read_msr(IA32_EFER_ADDRESS);
     write_msr(IA32_EFER_ADDRESS, static_cast<std::underlying_type<efer_flags>::type>(flag) | efer);
   }
-}  // namespace teachos::arch::memory::cpu
+}  // namespace teachos::arch::kernel::cpu
diff --git a/arch/x86_64/src/kernel/cpu/ss.cpp b/arch/x86_64/src/kernel/cpu/ss.cpp
index b7e52e1..9c8dd61 100644
--- a/arch/x86_64/src/kernel/cpu/ss.cpp
+++ b/arch/x86_64/src/kernel/cpu/ss.cpp
@@ -1,6 +1,6 @@
 #include "arch/kernel/cpu/ss.hpp"
 
-namespace teachos::arch::memory::cpu
+namespace teachos::arch::kernel::cpu
 {
   segment_selector::segment_selector(uint16_t index, std::bitset<1U> table_indicator,
                                      std::bitset<2U> requested_privilege_level)
@@ -20,14 +20,14 @@ namespace teachos::arch::memory::cpu
   auto read_ss() -> uint16_t
   {
     uint16_t ss;
-    __asm__("mov %%ss, %0" : "=r"(ss));
+    asm volatile("mov %%ss, %0" : "=r"(ss));
     return ss;
   }
 
   auto write_ss(segment_selector selector) -> void
   {
     uint16_t ss = selector.to_uint16();
-    __asm__("mov %0, %%ss" ::"r"(ss));
+    asm volatile("mov %0, %%ss" ::"r"(ss));
   }
 
-}  // namespace teachos::arch::memory::cpu
-\ No newline at end of file
+}  // namespace teachos::arch::kernel::cpu
+\ No newline at end of file
diff --git a/arch/x86_64/src/kernel/cpu/tlb.cpp b/arch/x86_64/src/kernel/cpu/tlb.cpp
index e753c2c..a09001c 100644
--- a/arch/x86_64/src/kernel/cpu/tlb.cpp
+++ b/arch/x86_64/src/kernel/cpu/tlb.cpp
@@ -2,9 +2,9 @@
 
 #include "arch/kernel/cpu/control_register.hpp"
 
-namespace teachos::arch::memory::cpu
+namespace teachos::arch::kernel::cpu
 {
-  auto tlb_flush(paging::virtual_address address) -> void
+  auto tlb_flush(memory::paging::virtual_address address) -> void
   {
     asm volatile("invlpg (%[input])" : /* no output from call */ : [input] "r"(address) : "memory");
   }
@@ -13,4 +13,4 @@ namespace teachos::arch::memory::cpu
   {
     write_control_register(cpu::control_register::CR3, read_control_register(cpu::control_register::CR3));
   }
-}  // namespace teachos::arch::memory::cpu
+}  // namespace teachos::arch::kernel::cpu
diff --git a/arch/x86_64/src/memory/main.cpp b/arch/x86_64/src/memory/main.cpp
index abc7431..a920a20 100644
--- a/arch/x86_64/src/memory/main.cpp
+++ b/arch/x86_64/src/memory/main.cpp
@@ -38,8 +38,8 @@ namespace teachos::arch::memory
     auto const memory_information = multiboot::read_multiboot2();
     allocator::area_frame_allocator allocator(memory_information);
 
-    cpu::set_cr0_bit(memory::cpu::cr0_flags::WRITE_PROTECT);
-    cpu::set_efer_bit(memory::cpu::efer_flags::NXE);
+    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);
     auto & active_table = kernel.remap_kernel();