iltiming.c

Windows CE 6.0 BSP for VOIPAC Board (PXA270) Version 2b.

//
// Copyright (c) Microsoft Corporation.  All rights reserved.
//
//
// Use of this source code is subject to the terms of the Microsoft end-user
// license agreement (EULA) under which you licensed this SOFTWARE PRODUCT.
// If you did not accept the terms of the EULA, you are not authorized to use
// this source code. For a copy of the EULA, please see the LICENSE.RTF on your
// install media.
//
/*++
THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
PARTICULAR PURPOSE.

Module Name:

   iltiming.c

Abstract:

   This module implements the code to support iltiming measurement.

Notes:


--*/

#include <windows.h>
#include <nkintr.h>
#include <pkfuncs.h>
#include <iltiming.h>


extern volatile BOOL fIntrTime, fProfilerRunning;
extern DWORD ARMTimer2CountSinceTick(void);
extern DWORD PerfCountFreq (void);
extern void ARMStartTimer2 (DWORD dwUsec);
extern void ARMStopTimer2 (void);

DWORD dwIsrTime1;
DWORD dwIsrTime2;
DWORD dwSPC;
WORD  wNumInterrupts;


//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
DWORD ARMHandleIlTiming (PILTIMING_MESSAGE pITM)
{
	int  nMSec;

    // Check for invalid argument
    if (!pITM) return FALSE;

    switch (pITM->wMsg) {
        
        case ILTIMING_MSG_ENABLE :
            if (fProfilerRunning) {
				RETAILMSG (1, (TEXT("Cannot start ILTiming while Monte Carlo Profiler is running\r\n")));
				return FALSE;
            }
			if (!(nMSec = (int) pITM->dwFrequency)) {
				RETAILMSG (1, (TEXT("ILTiming dwFreqency cannot b 0\r\n")));
				return FALSE;
			}
			if (!fIntrTime) {
				wNumInterrupts = 0;
				dwIsrTime1 = 0xFFFFFFFF;
				fIntrTime = TRUE;
                ARMStartTimer2 (nMSec * 1000);
			}
			RETAILMSG (1, (TEXT("ILTiming Enable (@ every %d MSec)\r\n"), nMSec));
            break;
        
        case ILTIMING_MSG_DISABLE :
            RETAILMSG (1, (TEXT("ILTiming Disable\r\n")));
            if (fIntrTime) {
			    fIntrTime = FALSE;
                ARMStopTimer2 ();
            }
            break;
        
        case ILTIMING_MSG_GET_TIMES :
            pITM->dwIsrTime1 = dwIsrTime1;
            pITM->dwIsrTime2 = dwIsrTime2;
            pITM->wNumInterrupts = wNumInterrupts;
            pITM->dwSPC = dwSPC;
            pITM->dwFrequency = PerfCountFreq();
            wNumInterrupts = 0;
            // RETAILMSG (1, (TEXT("ILTiming GetTime @ 0x%08X:%08X\r\n"), pITM->dwParam1, pITM->dwParam2));
            break;
        
        case ILTIMING_MSG_GET_PFN :
            pITM->pfnPerfCountSinceTick = (PVOID) ARMTimer2CountSinceTick;
            RETAILMSG (1, (TEXT("ILTiming GetPFN\r\n")));
            break;
        
        default : 
            RETAILMSG (1, (TEXT("IOCTL_HAL_ILTIMING : BAD MESSAGE!!!\r\n")));
            return (FALSE);
    }

	return (TRUE);
}