linux/crypto/ocf/kirkwood/mvHal/kw_family/ctrlEnv/sys/mvSysDram.c

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/* includes */

#include "ddr2/mvDramIf.h"
#include "ctrlEnv/sys/mvCpuIf.h"
#include "ctrlEnv/sys/mvSysDram.h"

/* #define MV_DEBUG */
#ifdef MV_DEBUG
#define DB(x) x
#else
#define DB(x)
#endif

static MV_BOOL sdramIfWinOverlap(MV_TARGET target, MV_ADDR_WIN *pAddrWin);

/*******************************************************************************
* mvDramIfWinSet - Set DRAM interface address decode window
*
* DESCRIPTION: 
*       This function sets DRAM interface address decode window.
*
* INPUT:
*	    target      - System target. Use only SDRAM targets.
*       pAddrDecWin - SDRAM address window structure.
*
* OUTPUT:
*       None
*
* RETURN:
*       MV_BAD_PARAM if parameters are invalid or window is invalid, MV_OK
*       otherwise.
*******************************************************************************/
MV_STATUS mvDramIfWinSet(MV_TARGET target, MV_DRAM_DEC_WIN *pAddrDecWin)
{
	MV_U32 baseReg=0,sizeReg=0;
	MV_U32 baseToReg=0 , sizeToReg=0;

    /* Check parameters */
	if (!MV_TARGET_IS_DRAM(target))
	{
		mvOsPrintf("mvDramIfWinSet: target %d is not SDRAM\n", target);
		return MV_BAD_PARAM;
	}

    /* Check if the requested window overlaps with current enabled windows	*/
    if (MV_TRUE == sdramIfWinOverlap(target, &pAddrDecWin->addrWin))
	{
        mvOsPrintf("mvDramIfWinSet: ERR. Target %d overlaps\n", target);
		return MV_BAD_PARAM;
	}

	/* check if address is aligned to the size */
	if(MV_IS_NOT_ALIGN(pAddrDecWin->addrWin.baseLow, pAddrDecWin->addrWin.size))
	{
		mvOsPrintf("mvDramIfWinSet:Error setting DRAM interface window %d."\
				   "\nAddress 0x%08x is unaligned to size 0x%x.\n",
                   target, 
				   pAddrDecWin->addrWin.baseLow,
				   pAddrDecWin->addrWin.size);
		return MV_ERROR;
	}

	/* read base register*/
	baseReg = MV_REG_READ(SDRAM_BASE_ADDR_REG(0,target));

	/* read size register */
	sizeReg = MV_REG_READ(SDRAM_SIZE_REG(0,target));

	/* BaseLow[31:16] => base register [31:16]		*/
	baseToReg = pAddrDecWin->addrWin.baseLow & SCBAR_BASE_MASK;

	/* Write to address decode Base Address Register                  */
	baseReg &= ~SCBAR_BASE_MASK;
	baseReg |= baseToReg;

	/* Translate the given window size to register format			*/
	sizeToReg = ctrlSizeToReg(pAddrDecWin->addrWin.size, SCSR_SIZE_ALIGNMENT);

	/* Size parameter validity check.                                   */
	if (-1 == sizeToReg)
	{
		mvOsPrintf("mvCtrlAddrDecToReg: ERR. Win %d size invalid.\n",target);
		return MV_BAD_PARAM;
	}

	/* set size */
	sizeReg &= ~SCSR_SIZE_MASK;
	/* Size is located at upper 16 bits */
	sizeReg |= (sizeToReg << SCSR_SIZE_OFFS);

	/* enable/Disable */
	if (MV_TRUE == pAddrDecWin->enable)
	{
		sizeReg |= SCSR_WIN_EN;
	}
	else
	{
		sizeReg &= ~SCSR_WIN_EN;
	}

	/* 3) Write to address decode Base Address Register                   */
	MV_REG_WRITE(SDRAM_BASE_ADDR_REG(0,target), baseReg);

	/* Write to address decode Size Register                        	*/
	MV_REG_WRITE(SDRAM_SIZE_REG(0,target), sizeReg);
	
	return MV_OK;
}
/*******************************************************************************
* mvDramIfWinGet - Get DRAM interface address decode window
*
* DESCRIPTION: 
*       This function gets DRAM interface address decode window.
*
* INPUT:
*	    target - System target. Use only SDRAM targets.
*
* OUTPUT:
*       pAddrDecWin - SDRAM address window structure.
*
* RETURN:
*       MV_BAD_PARAM if parameters are invalid or window is invalid, MV_OK
*       otherwise.
*******************************************************************************/
MV_STATUS mvDramIfWinGet(MV_TARGET target, MV_DRAM_DEC_WIN *pAddrDecWin)
{
	MV_U32 baseReg,sizeReg;
	MV_U32 sizeRegVal;
	/* Check parameters */
	if (!MV_TARGET_IS_DRAM(target))
	{
		mvOsPrintf("mvDramIfWinGet: target %d is Illigal\n", target);
		return MV_ERROR;
	}

	/* Read base and size registers */
	sizeReg = MV_REG_READ(SDRAM_SIZE_REG(0,target));
	baseReg = MV_REG_READ(SDRAM_BASE_ADDR_REG(0,target));

	sizeRegVal = (sizeReg & SCSR_SIZE_MASK) >> SCSR_SIZE_OFFS;

	pAddrDecWin->addrWin.size = ctrlRegToSize(sizeRegVal,
							SCSR_SIZE_ALIGNMENT);

    	/* Check if ctrlRegToSize returned OK */
	if (-1 == pAddrDecWin->addrWin.size)
	{
		mvOsPrintf("mvDramIfWinGet: size of target %d is Illigal\n", target);
		return MV_ERROR;
	}

	/* Extract base address						*/
	/* Base register [31:16] ==> baseLow[31:16] 		*/
	pAddrDecWin->addrWin.baseLow = baseReg & SCBAR_BASE_MASK;

	pAddrDecWin->addrWin.baseHigh =  0;


	if (sizeReg & SCSR_WIN_EN)
	{
		pAddrDecWin->enable = MV_TRUE;
	}
	else
	{
		pAddrDecWin->enable = MV_FALSE;			
	}

	return MV_OK;
}
/*******************************************************************************
* mvDramIfWinEnable - Enable/Disable SDRAM address decode window
*
* DESCRIPTION: 
*		This function enable/Disable SDRAM address decode window.
*
* INPUT:
*	    target - System target. Use only SDRAM targets.
*
* OUTPUT:
*		None.
*
* RETURN:
*		MV_ERROR in case function parameter are invalid, MV_OK otherewise.
*
*******************************************************************************/
MV_STATUS mvDramIfWinEnable(MV_TARGET target, MV_BOOL enable)
{
	MV_DRAM_DEC_WIN 	addrDecWin;

	/* Check parameters */
	if (!MV_TARGET_IS_DRAM(target))
	{
		mvOsPrintf("mvDramIfWinEnable: target %d is Illigal\n", target);
		return MV_ERROR;
	}

	if (enable == MV_TRUE) 
	{   /* First check for overlap with other enabled windows				*/
		if (MV_OK != mvDramIfWinGet(target, &addrDecWin))
		{
			mvOsPrintf("mvDramIfWinEnable:ERR. Getting target %d failed.\n", 
                                                                        target);
			return MV_ERROR;
		}
		/* Check for overlapping */
		if (MV_FALSE == sdramIfWinOverlap(target, &(addrDecWin.addrWin)))
		{
			/* No Overlap. Enable address decode winNum window              */
			MV_REG_BIT_SET(SDRAM_SIZE_REG(0,target), SCSR_WIN_EN);
		}
		else
		{   /* Overlap detected	*/
			mvOsPrintf("mvDramIfWinEnable: ERR. Target %d overlap detect\n",
                                                                        target);
			return MV_ERROR;
		}
	}
	else
	{   /* Disable address decode winNum window                             */
		MV_REG_BIT_RESET(SDRAM_SIZE_REG(0, target), SCSR_WIN_EN);
	}

	return MV_OK;
}

/*******************************************************************************
* sdramIfWinOverlap - Check if an address window overlap an SDRAM address window
*
* DESCRIPTION:
*		This function scan each SDRAM address decode window to test if it 
*		overlapps the given address windoow 
*
* INPUT:
*       target      - SDRAM target where the function skips checking.
*       pAddrDecWin - The tested address window for overlapping with 
*					  SDRAM windows.
*
* OUTPUT:
*       None.
*
* RETURN:
*       MV_TRUE if the given address window overlaps any enabled address
*       decode map, MV_FALSE otherwise.
*
*******************************************************************************/
static MV_BOOL sdramIfWinOverlap(MV_TARGET target, MV_ADDR_WIN *pAddrWin)
{
	MV_TARGET	targetNum;
	MV_DRAM_DEC_WIN 	addrDecWin;
	
	for(targetNum = SDRAM_CS0; targetNum < MV_DRAM_MAX_CS ; targetNum++)
	{
		/* don't check our winNum or illegal targets */
		if (targetNum == target)
		{
			continue;
		}
		
		/* Get window parameters 	*/
		if (MV_OK != mvDramIfWinGet(targetNum, &addrDecWin))
		{
			mvOsPrintf("sdramIfWinOverlap: ERR. TargetWinGet failed\n");
			return MV_ERROR;
		}
	
		/* Do not check disabled windows	*/
		if (MV_FALSE == addrDecWin.enable)
		{
			continue;
		}
	
		if(MV_TRUE == ctrlWinOverlapTest(pAddrWin, &addrDecWin.addrWin))
		{                    
			mvOsPrintf(
			"sdramIfWinOverlap: Required target %d overlap winNum %d\n", 
			target, targetNum);
			return MV_TRUE;           
		}
	}
	
	return MV_FALSE;
}