Architecture specific initialization prior to processor structures initialization

xtoskrnl/ke/i686/krnlinit.c

@@ -20,6 +20,15 @@ XTAPI
 VOID
 KepArchInitialize(VOID)
 {
+    /* Clear EFLAGS register */
+    ArWriteEflagsRegister(0);
+
+    /* Enable write-protection */
+    ArWriteControlRegister(0, ArReadControlRegister(0) | CR0_WP);
+
+    /* Re-enable IDE interrupts */
+    HlIoPortOutByte(0x376, 0);
+    HlIoPortOutByte(0x3F6, 0);
 }
 
 /**