/*******************************************************************************
* mvCpuIfDramInit - Initialize Controller DRAM Fastpath windows
*
* DESCRIPTION:
* This function initialize Controller DRAM Fastpath windows
* It takes the CS size information from the 0x1500 scratch registers
* and sets the correct windows sizes and base addresses accordingly
* INPUT:
* None.
*
* OUTPUT:
* None.
*
* RETURN:
* None.
*
*******************************************************************************/
MV_STATUS mvCpuIfDramInit()
{
MV_U32 base = 0;
MV_U32 size, cs, temp;
for (cs = 0; cs < SDRAM_MAX_CS; cs++) {
size = MV_REG_READ(SDRAM_SIZE_REG(cs)) & SDRAM_ADDR_MASK;
if (size > 0 && base < SDRAM_MAX_ADDR) {
size |= ~(SDRAM_ADDR_MASK);
/* Set Base Address */
MV_REG_WRITE(SDRAM_WIN_BASE_REG(cs), (base & SDRAM_ADDR_MASK));
/* Check if out of max window size and resize the window */
if (base+size > SDRAM_MAX_ADDR) {
size = SDRAM_MAX_ADDR - base - 1;
MV_REG_WRITE(SDRAM_SIZE_REG(cs), 0);
}
temp = (MV_REG_READ(SDRAM_WIN_CTRL_REG(cs)) & ~(SDRAM_ADDR_MASK)) | (1<<SDRAM_WIN_CTRL_WIN_ENA_OFFS);
temp |= (size & SDRAM_ADDR_MASK);
MV_REG_WRITE(SDRAM_WIN_CTRL_REG(cs), temp);
base += (size + 1);
}
}
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(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(target), SCSR_WIN_EN);
}
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(target));
baseReg = MV_REG_READ(SDRAM_BASE_ADDR_REG(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;
}
/*******************************************************************************
* 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(target));
/* read size register */
sizeReg = MV_REG_READ(SDRAM_SIZE_REG(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(target), baseReg);
/* Write to address decode Size Register */
MV_REG_WRITE(SDRAM_SIZE_REG(target), sizeReg);
return MV_OK;
}
