1 /*

     2 * Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  

    15 * Defintions for High resolution timer

    16 *

    17 */

    18 

    19 

    20 

    21 

    22 

    23 #ifndef __HIGHRESTIMER_H__

    24 #define __HIGHRESTIMER_H__

    25 

    26 /**

    27  * Macro indicating that a high resolution timer is supported.

    28  */

    29 #define HAS_HIGH_RES_TIMER

    30 

    31 #ifdef __MEMMODEL_DIRECT__

    32 #define HIGH_RES_COUNT_HW_ADDR 0x18036800	/* address of timer 2 counter */

    33 #else

    34 #define HIGH_RES_COUNT_HW_ADDR 0xC6003800	/* address of timer 2 counter */

    35 #endif

    36 

    37 /**

    38  * Assembler macro to get the the current value of the high res timer and place

    39  * it in the specified register.

    40  */

    41 #define GET_HIGH_RES_TICK_COUNT(Rd) \

    42 	asm("ldr	"#Rd", = %a0" : : "i" (HIGH_RES_COUNT_HW_ADDR)); \

    43 	asm("ldr	"#Rd", ["#Rd"]")

    44 

    45 /**

    46  * The frequency of the timer in Hz.

    47  */

    48 const TInt KHighResTimerFrequency = 2083333; // 200MHz/(3*32)

    49 

    50 /**

    51  * Macro indicating that the timer counts up if defined.

    52  */

    53 #define HIGH_RES_TIMER_COUNTS_UP

    54 

    55 #endif