/*+
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* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).+
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* All rights reserved.+
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* This component and the accompanying materials are made available+
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* under the terms of the License "Eclipse Public License v1.0"+
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* which accompanies this distribution, and is available+
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".+
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*+
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* Initial Contributors:+
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* Nokia Corporation - initial contribution.+
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*+
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* Contributors:+
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* NTT Docomo, Inc : BUG 1296+
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*+
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* Description:+
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*+
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*/+
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+
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/**+
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 * @file+
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 * @internalTechnology+
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 *+
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 * The highrestimer.h header file defines how to access the high resoltion+
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 * timer, if one is supported.  This file is used by default if the variant does+
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 * not export one to \epoc32\include\nkern. +
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 */+
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+
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#ifndef __HIGHRESTIMER_H__+
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#define __HIGHRESTIMER_H__+
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//+
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// Copyright (c) 2008 Symbian Ltd. All rights reserved.+
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//+
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+
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#include <syborg.h>+
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+
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/**+
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 * Macro indicating that a high resolution timer is supported.+
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 */+
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#define HAS_HIGH_RES_TIMER+
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+
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/**+
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 * Assembler macro to get the the current value of the high res timer and place+
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 * it in the specified register.+
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 * Reads the 32-bit value from a free-running counter that represents the current time. +
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 * Syborg timers have 'microsecond resolution'. NB. This value comes from the host clock+
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 * and so there is a good chance that the kernels tick based notion of time (elapsed) and that+
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 * measured by the free running timer will get out of kilter. This affects t_cputime from e32test+
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 * amongst other things.+
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 */+
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//#define GET_HIGH_RES_TICK_COUNT(Rd) asm("nop");+
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// Hi-jacking r10 for tmp, not good if Rd is R10 -- grepping the the kernel shows it's not (for now)+
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#define GET_HIGH_RES_TICK_COUNT(Rd)						         \+
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  asm("push {r10}");										     \+
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  asm("mov r10, #1");										     \+
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  asm("ldr "#Rd", =%a0"               : : "i" (KHwBaseRtc + 4)); \+
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  asm("str r10, ["#Rd", #%a0]"        : : "i" (0));			     \+
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  asm("pop {r10}");                                              \+
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  asm("ldr "#Rd", =%a0"               : : "i" (KHwBaseRtc + 8)); \+
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  asm("ldr "#Rd", ["#Rd", #%a0]"      : : "i" (0));              +
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+
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/**+
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 * The frequency of the timer in Hz.+
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 */+
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const TInt KHighResTimerFrequency = 1000000;+
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+
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/**+
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 * Macro indicating that the timer counts up if defined.+
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 */+
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#define HIGH_RES_TIMER_COUNTS_UP+
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+
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#endif  // __HIGHRESTIMER_H__+
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