ixperfprofaccxcycle_p.h

有关ARM开发板上的IXP400网络驱动程序的源码以。

/**
 * IxPerfProfAccXcycle_p.h 
 *
 * Date April 10 2003
 *
 * Header file for the Xcycle module of PerfProfAcc component
 *
 *
 * Design Notes:
 *
 * @par 
 * IXP400 SW Release version 2.1
 * 
 * -- Copyright Notice --
 * 
 * @par
 * Copyright (c) 2001-2005, Intel Corporation.
 * All rights reserved.
 * 
 * @par
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the Intel Corporation nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 * 
 * 
 * @par
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * 
 * @par
 * -- End of Copyright Notice --
 */


#ifndef IXPERFPROFACCXCYCLE_P_H
#define IXPERFPROFACCXCYCLE_P_H

/*
 * Intermodule dependancies
 */

#include "IxOsal.h"
#include "IxPerfProfAcc.h"

#define INLINE __inline__

/* 
 * Break a one second duration into smaller time slices. It is 
 * not possible to break out of measurement within a time slice. 
 * The program check for time passes after each time slice. 
 * This allow the program to break out of a loop that takes too 
 * long to complete. The maximum time allowed for each measurement 
 * before it is terminated is defined in 
 * IX_PERFPROF_ACC_XCYCLE_MAX_TIME_IN_ONE_MEASUREMENT. 
 */ 
#define IX_PERFPROF_ACC_XCYCLE_TIME_SLICES_PER_SEC 	128 

/* 
 * Time in seconds allowed in one measurement before the 
 * measurement is cut short
 */ 
#define IX_PERFPROF_ACC_XCYCLE_MAX_TIME_IN_ONE_MEASUREMENT 5	

/* System timer in Hertz. Multiply clock speed in MHz by 1000000 */ 
#define IX_PERFPROF_ACC_XCYCLE_TIMER_FREQ ixOsalTimestampResolutionGet() 

/* 
 * Number of loops to find loops per slice per sec. We need a arbitary 
 * but reasonable number to perform enough looping to find 
 * how many loops it takes for a duration of 1 sec 
 * Experiment shows any value between 0x10000 to 0x100000 is acceptable. 
 */ 
#define IX_PERFPROF_ACC_XCYCLE_SEED_FOR_BASELINE (0x10000) 

/* 
 * Constants to set priority for different OSes 
 */ 
#define IX_PERFPROF_ACC_XCYCLE_LINUXAPP_PRIORITY_HIGHEST (-20) 

#define IX_PERFPROF_ACC_XCYCLE_LINUXAPP_PRIORITY_LOWEST	 (19)

#define IX_PERFPROF_ACC_XCYCLE_VXWORKS_PRIORITY_HIGHEST (0) 

#define IX_PERFPROF_ACC_XCYCLE_VXWORKS_PRIORITY_LOWEST	(255)

/*
 * Internal data structure 
 */
typedef struct  
{
	UINT32 xcycleCountStart;
	UINT32 xcycleCountStop;
	UINT32 totalTimeSlices; 
}IxPerfProfAccXcycleMeasuredResults;

/* 
 * Private functions 
 */

/**
 * Param "UINT32 numLoop [in] numLoop" Number of iterations to run
 *
 * Global Data  : 
 *                        - None.
 *                        
 *
 * Perform a small loop of numLoop times. 
 * This function is used to consume a fixed amount of XScale cycle 
 * without needing to access any memory. 
 *
 * return 
 *      - None
 *              
 * Reentrant    : no
 * ISR Callable : no
 *
 */
INLINE void
ixPerfProfAccXcycleLoopIter(UINT32 numLoop);

/**
 * Compute number of numLoop where ixPerfProfAccXcycleLoopIter(numLoop)
 * takes 1/IX_PERFPROF_ACC_XCYCLE_TIME_SLICES_PER_SEC seconds to complete
 * 
 * return 
 *      - Number of loops required for ixPerfProfAccXcycleLoopIter to run 
 *			for 1/IX_PERFPROF_ACC_XCYCLE_TIME_SLICES_PER_SEC seconds
 
 *              
 * Reentrant    : no
 * ISR Callable : no
 *
 */
UINT32 ixPerfProfAccXcycleComputeLoopsPerSlice(void);

/**
 * 		
 * Run numMeasurementsRequested measurements. Collect time needed for 
 * each execution. 
 * Stop measurement if stopMeasurement is TRUE.   
 *
 * param UINT32 [in] numMeasurementsRequested
 *
 * Global Data  : 
 *                        - None.
 *                        
 * return 
 *      - None
 *              
 * Reentrant    : no
 * ISR Callable : no
 *
 */
void 
ixPerfProfAccXcycleNumPeriodRun(UINT32 numMeasurementsRequested) ;

/**	
 *
 * Read the APB timer
 * 
 * param None
 *
 * Global Data  : 
 *                        - None.
 * return 
 *      - Value of APB timer
 *              
 * Reentrant    : no
 * ISR Callable : no
 *
 */
INLINE UINT32
ixPerfProfAccXcycleApbTimerGet(void); 

#endif /* ifndef IXPERFPROFACCXCYCLE_P_H */