/*******************************************************************************
* mvCpuIfTargetWinEnable - Enable/disable a CPU address decode window
*
* DESCRIPTION:
* This function enable/disable a CPU address decode window.
* if parameter 'enable' == MV_TRUE the routine will enable the
* window, thus enabling CPU accesses (before enabling the window it is
* tested for overlapping). Otherwise, the window will be disabled.
*
* INPUT:
* target - Peripheral target enumerator.
* enable - Enable/disable parameter.
*
* OUTPUT:
* N/A
*
* RETURN:
* MV_ERROR if protection window number was wrong, or the window
* overlapps other target window.
*
*******************************************************************************/
MV_STATUS mvCpuIfTargetWinEnable(MV_TARGET target,MV_BOOL enable)
{
MV_U32 winNum, temp;
MV_CPU_DEC_WIN addrDecWin;
/* Check parameters */
if (target >= MAX_TARGETS)
{
mvOsPrintf("mvCpuIfTargetWinEnable: target %d is Illigal\n", target);
return MV_ERROR;
}
/* get the window and check if it exist */
temp = mvCpuIfTargetWinGet(target, &addrDecWin);
if (MV_NO_SUCH == temp)
{
return (enable? MV_ERROR: MV_OK);
}
else if( MV_OK != temp)
{
mvOsPrintf("%s: ERR. Getting target %d failed.\n",__FUNCTION__, target);
return MV_ERROR;
}
/* check overlap */
if (MV_TRUE == enable)
{
if (MV_TRUE == cpuTargetWinOverlap(target, &addrDecWin.addrWin))
{
DB(mvOsPrintf("%s: ERR. Target %d overlap\n",__FUNCTION__, target));
return MV_ERROR;
}
}
if (!MV_TARGET_IS_DRAM(target))
{
/* get the Window number associated with this target */
winNum = mvAhbToMbusWinTargetGet(target);
if (winNum >= MAX_AHB_TO_MBUS_WINS)
{
return (enable? MV_ERROR: MV_OK);
}
if (mvAhbToMbusWinEnable(winNum , enable) != MV_OK)
{
mvOsPrintf("mvCpuIfTargetWinGet: Failed to enable window = %d\n",
winNum);
return MV_ERROR;
}
}
return MV_OK;
}
/*******************************************************************************
* mvCpuIfTargetWinSet - Set CPU-to-peripheral target address window
*
* DESCRIPTION:
* This function sets a peripheral target (e.g. SDRAM bank0, PCI0_MEM0)
* address window, also known as address decode window.
* A new address decode window is set for specified target address window.
* If address decode window parameter structure enables the window,
* the routine will also enable the target window, allowing CPU to access
* the target window.
*
* INPUT:
* target - Peripheral target enumerator.
* pAddrDecWin - CPU target window data structure.
*
* OUTPUT:
* N/A
*
* RETURN:
* MV_OK if CPU target window was set correctly, MV_ERROR in case of
* address window overlapps with other active CPU target window or
* trying to assign 36bit base address while CPU does not support that.
* The function returns MV_NOT_SUPPORTED, if the target is unsupported.
*
*******************************************************************************/
MV_STATUS mvCpuIfTargetWinSet(MV_TARGET target, MV_CPU_DEC_WIN *pAddrDecWin)
{
MV_AHB_TO_MBUS_DEC_WIN decWin;
MV_U32 existingWinNum;
MV_DRAM_DEC_WIN addrDecWin;
target = MV_CHANGE_BOOT_CS(target);
/* Check parameters */
if (target >= MAX_TARGETS)
{
mvOsPrintf("mvCpuIfTargetWinSet: target %d is illegal\n", target);
return MV_ERROR;
}
/* 2) Check if the requested window overlaps with current windows */
if (MV_TRUE == cpuTargetWinOverlap(target, &pAddrDecWin->addrWin))
{
mvOsPrintf("mvCpuIfTargetWinSet: ERR. Target %d overlap\n", target);
return MV_BAD_PARAM;
}
if (MV_TARGET_IS_DRAM(target))
{
/* copy relevant data to MV_DRAM_DEC_WIN structure */
addrDecWin.addrWin.baseHigh = pAddrDecWin->addrWin.baseHigh;
addrDecWin.addrWin.baseLow = pAddrDecWin->addrWin.baseLow;
addrDecWin.addrWin.size = pAddrDecWin->addrWin.size;
addrDecWin.enable = pAddrDecWin->enable;
if (mvDramIfWinSet(target,&addrDecWin) != MV_OK);
{
mvOsPrintf("mvCpuIfTargetWinSet: mvDramIfWinSet Failed\n");
return MV_ERROR;
}
}
else
{
/* copy relevant data to MV_AHB_TO_MBUS_DEC_WIN structure */
decWin.addrWin.baseLow = pAddrDecWin->addrWin.baseLow;
decWin.addrWin.baseHigh = pAddrDecWin->addrWin.baseHigh;
decWin.addrWin.size = pAddrDecWin->addrWin.size;
decWin.enable = pAddrDecWin->enable;
decWin.target = target;
existingWinNum = mvAhbToMbusWinTargetGet(target);
/* check if there is already another Window configured
for this target */
if ((existingWinNum < MAX_AHB_TO_MBUS_WINS )&&
(existingWinNum != pAddrDecWin->winNum))
{
/* if we want to enable the new winow number
passed by the user , then the old one should
be disabled */
if (MV_TRUE == pAddrDecWin->enable)
{
/* be sure it is disabled */
mvAhbToMbusWinEnable(existingWinNum , MV_FALSE);
}
}
if (mvAhbToMbusWinSet(pAddrDecWin->winNum,&decWin) != MV_OK)
{
mvOsPrintf("mvCpuIfTargetWinSet: mvAhbToMbusWinSet Failed\n");
return MV_ERROR;
}
}
return MV_OK;
}
