diff --git a/xtoskrnl/hl/amd64/cpufunc.c b/xtoskrnl/hl/amd64/cpufunc.c
index 6b02519..0cb1981 100644
--- a/xtoskrnl/hl/amd64/cpufunc.c
+++ b/xtoskrnl/hl/amd64/cpufunc.c
@@ -51,6 +51,13 @@ HlCpuId(IN OUT PCPUID_REGISTERS Registers)
     return TRUE;
 }
 
+/**
+ * Halts the central processing unit (CPU).
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
 XTAPI
 VOID
 HlHalt()
diff --git a/xtoskrnl/hl/i686/cpufunc.c b/xtoskrnl/hl/i686/cpufunc.c
index f0ae399..5187a62 100644
--- a/xtoskrnl/hl/i686/cpufunc.c
+++ b/xtoskrnl/hl/i686/cpufunc.c
@@ -51,6 +51,13 @@ HlCpuId(IN OUT PCPUID_REGISTERS Registers)
     return TRUE;
 }
 
+/**
+ * Halts the central processing unit (CPU).
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
 XTAPI
 VOID
 HlHalt()
diff --git a/xtoskrnl/ke/krnlinit.c b/xtoskrnl/ke/krnlinit.c
index 9812044..e9d1101 100644
--- a/xtoskrnl/ke/krnlinit.c
+++ b/xtoskrnl/ke/krnlinit.c
@@ -12,6 +12,9 @@
 /**
  * This routine starts up the XT kernel. It is called by boot loader.
  *
+ * @param Parameters
+ *        Supplies a pointer to memory area containing parameters passed to kernel by bootloader.
+ *
  * @return This routine does not return any value.
  *
  * @since XT 1.0