kapi/cpu: introduce CPU API

2 files changed, 22 insertions, 9 deletions

diff --git a/arch/x86_64/kapi/cpu.cpp b/arch/x86_64/kapi/cpu.cpp
index 2a0f8f7..693d328 100644
--- a/arch/x86_64/kapi/cpu.cpp
+++ b/arch/x86_64/kapi/cpu.cpp
@@ -1,8 +1,29 @@
 #include "kapi/cpu.hpp"
 
+#include "kapi/system.hpp"
+
+#include "arch/cpu/initialization.hpp"
+#include "arch/cpu/interrupts.hpp"
+
+#include <atomic>
+
 namespace kapi::cpu
 {
 
+  auto init() -> void
+  {
+    auto static constinit is_initialized = std::atomic_flag{};
+
+    if (is_initialized.test_and_set())
+    {
+      system::panic("[x86_64] CPU has already been initialized.");
+    }
+
+    arch::cpu::initialize_descriptors();
+    arch::cpu::initialize_legacy_interrupts();
+    arch::cpu::enable_interrupts();
+  }
+
   auto halt() -> void
   {
     asm volatile("1: hlt\njmp 1b");
diff --git a/arch/x86_64/kapi/system.cpp b/arch/x86_64/kapi/system.cpp
index 301169f..09c7152 100644
--- a/arch/x86_64/kapi/system.cpp
+++ b/arch/x86_64/kapi/system.cpp
@@ -1,16 +1,8 @@
 #include "kapi/system.hpp"
 
-#include "arch/cpu/initialization.hpp"
-#include "arch/cpu/interrupts.hpp"
-
 namespace kapi::system
 {
 
-  auto memory_initialized() -> void
-  {
-    arch::cpu::initialize_descriptors();
-    arch::cpu::initialize_legacy_interrupts();
-    arch::cpu::enable_interrupts();
-  }
+  auto memory_initialized() -> void {}
 
 }  // namespace kapi::system
\ No newline at end of file