xl2cc_counter.c

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/* $Id: xl2cc_counter.c,v 1.1.4.1 2011/10/24 09:35:16 sadanan Exp $ */
/******************************************************************************
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/*****************************************************************************/
/**
*
* @file xl2cc_counter.c
*
* This file contains APIs for configuring and controlling the event counters
* in PL310 L2 cache controller. For more information about the event counters,
* see xl2cc_counter.h.
*
* <pre>
* MODIFICATION HISTORY:
*
* Ver   Who  Date     Changes
* ----- ---- -------- -----------------------------------------------
* 1.00a sdm  07/11/11 First release
* </pre>
*
******************************************************************************/

/***************************** Include Files *********************************/

#include <stdint.h>
#include "xparameters_ps.h"
#include "xl2cc_counter.h"
#include "xl2cc.h"

/************************** Constant Definitions ****************************/

/**************************** Type Definitions ******************************/

/***************** Macros (Inline Functions) Definitions ********************/

/************************** Variable Definitions *****************************/

/************************** Function Prototypes ******************************/

void XL2cc_EventCtrReset(void);

/******************************************************************************/

/****************************************************************************/
/**
*
* This function initializes the event counters in L2 Cache controller with a
* set of event codes specified by the user.
*
* @param	Event0 is the event code for counter 0.
* @param	Event1 is the event code for counter 1.
*		Use the event codes defined by XL2CC_* in xl2cc_counter.h.
*
* @return	None.
*
* @note		None.
*
*****************************************************************************/
void XL2cc_EventCtrInit(int Event0, int Event1)
{

	/* Write event code into cnt1 cfg reg */
	*((volatile u32*)XPS_L2CC_EVNT_CNT1_CTRL_OFFSET) = (Event1 << 2);

	/* Write event code into cnt0 cfg reg */
	*((volatile u32*)XPS_L2CC_EVNT_CNT0_CTRL_OFFSET) = (Event0 << 2);

	/* Reset counters */
	XL2cc_EventCtrReset();
}

/****************************************************************************/
/**
*
* This function starts the event counters in L2 Cache controller.
*
* @param	None.
*
* @return	None.
*
* @note		None.
*
*****************************************************************************/
void XL2cc_EventCtrStart(void)
{
	XL2cc_EventCtrReset();

	/* Enable counter */
	*((volatile u32*)XPS_L2CC_EVNT_CNTRL_OFFSET) = 1;
}

/****************************************************************************/
/**
*
* This function disables the event counters in L2 Cache controller, saves the
* counter values and resets the counters.
*
* @param	EveCtr0 is an output parameter which is used to return the value
*		in event counter 0.
*		EveCtr1 is an output parameter which is used to return the value
*		in event counter 1.
*
* @return	None.
*
* @note		None.
*
*****************************************************************************/
void XL2cc_EventCtrStop(u32 *EveCtr0, u32 *EveCtr1)
{
	/* Disable counter */
	*((volatile u32*)XPS_L2CC_EVNT_CNTRL_OFFSET) = 0;

	/* Save counter values */
	*EveCtr1 = *((volatile u32*)XPS_L2CC_EVNT_CNT1_VAL_OFFSET);
	*EveCtr0 = *((volatile u32*)XPS_L2CC_EVNT_CNT0_VAL_OFFSET);

	XL2cc_EventCtrReset();
}

/****************************************************************************/
/**
*
* This function resets the event counters in L2 Cache controller.
*
* @param	None.
*
* @return	None.
*
* @note		None.
*
*****************************************************************************/
void XL2cc_EventCtrReset(void)
{
	*((volatile u32*)XPS_L2CC_EVNT_CNTRL_OFFSET) = 0x6;
}