Implement routines for accessing and manipulating CPU control registers

sdk/xtdk/i686/hlfuncs.h

@@ -0,0 +1,62 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            sdk/xtdk/i686/hlfuncs.h
+ * DESCRIPTION:     XT hardware abstraction layer routines specific to i686 architecture
+ * DEVELOPERS:      Rafal Kupiec <belliash@codingworkshop.eu.org>
+ */
+
+#ifndef __XTDK_I686_HLFUNCS_H
+#define __XTDK_I686_HLFUNCS_H
+
+#include "xtdefs.h"
+#include "xtstruct.h"
+#include "xttypes.h"
+
+
+/* I/O port addresses for COM ports */
+extern ULONG ComPortAddress[];
+
+/* HAL library routines forward references */
+XTAPI
+UCHAR
+HlIoPortInByte(IN USHORT Port);
+
+XTAPI
+VOID
+HlIoPortOutByte(IN USHORT Port,
+                IN UCHAR Data);
+
+XTAPI
+ULONG_PTR
+HlReadCR0();
+
+XTAPI
+ULONG_PTR
+HlReadCR2();
+
+XTAPI
+ULONG_PTR
+HlReadCR3();
+
+XTAPI
+ULONG_PTR
+HlReadCR4();
+
+XTAPI
+VOID
+HlWriteCR0(UINT_PTR Data);
+
+XTAPI
+VOID
+HlWriteCR2(UINT_PTR Data);
+
+XTAPI
+VOID
+HlWriteCR3(UINT_PTR Data);
+
+XTAPI
+VOID
+HlWriteCR4(UINT_PTR Data);
+
+#endif /* __XTDK_I686_HLFUNCS_H */