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1 /* |
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2 * Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: |
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15 * Defintions for High resolution timer |
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16 * |
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17 */ |
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18 |
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19 |
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20 |
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21 |
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22 |
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23 #ifndef __HIGHRESTIMER_H__ |
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24 #define __HIGHRESTIMER_H__ |
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25 |
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26 /** |
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27 * Macro indicating that a high resolution timer is supported. |
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28 */ |
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29 #define HAS_HIGH_RES_TIMER |
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30 |
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31 #ifdef __MEMMODEL_DIRECT__ |
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32 #define HIGH_RES_COUNT_HW_ADDR 0x18036800 /* address of timer 2 counter */ |
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33 #else |
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34 #define HIGH_RES_COUNT_HW_ADDR 0xC6003800 /* address of timer 2 counter */ |
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35 #endif |
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36 |
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37 /** |
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38 * Assembler macro to get the the current value of the high res timer and place |
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39 * it in the specified register. |
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40 */ |
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41 #define GET_HIGH_RES_TICK_COUNT(Rd) \ |
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42 asm("ldr "#Rd", = %a0" : : "i" (HIGH_RES_COUNT_HW_ADDR)); \ |
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43 asm("ldr "#Rd", ["#Rd"]") |
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44 |
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45 /** |
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46 * The frequency of the timer in Hz. |
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47 */ |
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48 const TInt KHighResTimerFrequency = 2083333; // 200MHz/(3*32) |
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49 |
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50 /** |
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51 * Macro indicating that the timer counts up if defined. |
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52 */ |
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53 #define HIGH_RES_TIMER_COUNTS_UP |
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54 |
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55 #endif |