diff -r 666f914201fb -r 2fe1408b6811 epoc32/include/kernel/hal_int.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/epoc32/include/kernel/hal_int.h	Tue Mar 16 16:12:26 2010 +0000
@@ -0,0 +1,88 @@
+// Copyright (c) 1995-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members
+// which accompanies this distribution, and is available
+// at the URL "http://www.symbianfoundation.org/legal/licencesv10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// hal\inc\hal_int.h
+// 
+//
+
+#ifndef __HAL_INT_H__
+#define __HAL_INT_H__
+
+#include <hal.h>
+#include <e32svr.h>
+
+/**
+@publishedPartner
+@released
+
+The signature for accessor functions for derived attributes
+
+@param aDeviceNumber A device number is applicable when a system has
+multiple instances of a device. The parameter specifies which one to
+interrogate. Eg. a phone may have 2 displays, so it's HAL accessor functions
+would access different information depending on whether aDeviceNumber was 0 or 1.
+
+@param aAttrib The HAL attribute to access.
+@param aSet ETrue if the specified attribute should be modified; EFalse for a read.
+@param aInOut A pointer to a TInt. If aSet is:
+	- ETrue it points to the new value to be written.
+	- EFalse it is used to return the value read.
+	  It may also be used to pass an argument in,
+	  in order to select one of multiple values to retreive.
+	  If it is equal to -1 then the function must
+	  return KErrArgument so that callers can identify that
+	  the function uses aInOut as an input even when aSet is false.
+
+@return An error code
+	- KErrNone
+	- KErrArgument aInOut was invalid (may occur for aSet true or false)
+*/
+typedef TInt (*THalImplementation)(TInt aDeviceNumber, TInt aAttrib, TBool aSet, TAny* aInOut);
+
+/**
+@internalComponent
+*/
+class HalInternal
+	{
+public:
+	static const TUint8 Properties[HAL::ENumHalAttributes];
+	static const TInt Offset[HAL::ENumHalAttributes];
+	// InitialValue[] is only exported for patchdata purposes (other executables
+	// must not import this array; all access should be through the published Hal
+	// APIs).  EXPORT_C needs to be on the declaration here so that it has external
+	// linkage (class data is treated differently to non-class data).
+	EXPORT_C static const TInt InitialValue[HAL::ENumHalAttributes];
+	static const THalImplementation Implementation[HAL::ENumHalAttributes];
+	static const TInt HalDataSize;
+
+	enum THalPanic
+		{
+		EReadOffsetInvalid=0,
+		EWriteOffsetInvalid=1,
+		EInitialAllocFailed1=2,
+		EInitialAllocFailed2=3,
+		EInitialWriteFailed=4,
+		EInitialWriteFailed2=5,
+		ETlsSizeInvalid=6,
+		ENoSuchHalProp=7,
+		EGetPropFailed=8,
+		ESetPropFailed=9
+		};
+
+	static void Panic(THalPanic aPanic);
+	static void InitialiseData();
+	static TInt ReadWord(TInt anOffset);
+	static TInt WriteWord(TInt anOffset, TInt aValue);
+	};
+
+#endif