kernel/src/arch/CPU.h

@@ -13,6 +13,8 @@ namespace CPU
 
     [[noreturn]] void efficient_halt();
 
+    void idle_loop();
+
     void switch_kernel_stack(u64 top);
 
     void enable_interrupts();

kernel/src/arch/x86_64/CPU.cpp

@@ -1,14 +1,14 @@
 #include "arch/CPU.h"
-#include "arch/x86_64/CPU.h"
 #include "Log.h"
 #include "arch/Timer.h"
+#include "arch/x86_64/CPU.h"
 #include "arch/x86_64/IO.h"
 #include <cpuid.h>
+#include <luna/Check.h>
+#include <luna/Result.h>
 #include <luna/String.h>
 #include <luna/SystemError.h>
 #include <luna/Types.h>
-#include <luna/Check.h>
-#include <luna/Result.h>
 
 extern "C" void enable_sse();
 extern "C" void enable_write_protect();
@@ -430,6 +430,14 @@ namespace CPU
         goto loop;           // Safeguard: if we ever wake up, start our low-power rest again
     }
 
+    void idle_loop()
+    {
+        asm volatile("sti");
+    loop:
+        asm volatile("hlt");
+        goto loop;
+    }
+
     void switch_kernel_stack(u64 top)
     {
         task_state_segment.rsp[0] = top;