/* Memory.c - Memory mappings and remapping functions */
/* Copyright - Galileo technology. */
/* modified by Josh Huber to clean some things up, and
* fit it into the U-Boot framework */
#include <galileo/core.h>
#include <galileo/memory.h>
/********************************************************************
* memoryGetBankBaseAddress - Gets the base address of a memory bank
* - If the memory bank size is 0 then this base address has no meaning!!!
*
*
* INPUTS: MEMORY_BANK bank - The bank we ask for its base Address.
* OUTPUT: N/A
* RETURNS: Memory bank base address.
*********************************************************************/
static unsigned long memoryGetBankRegOffset(MEMORY_BANK bank)
{
switch (bank)
{
case BANK0:
return SCS_0_LOW_DECODE_ADDRESS;
case BANK1:
return SCS_1_LOW_DECODE_ADDRESS;
case BANK2:
return SCS_2_LOW_DECODE_ADDRESS;
case BANK3:
return SCS_3_LOW_DECODE_ADDRESS;
}
return SCS_0_LOW_DECODE_ADDRESS; /* default value */
}
unsigned int memoryGetBankBaseAddress(MEMORY_BANK bank)
{
unsigned int base;
unsigned int regOffset=memoryGetBankRegOffset(bank);
GT_REG_READ(regOffset,&base);
base = base << 20;
return base;
}
/********************************************************************
* memoryGetDeviceBaseAddress - Gets the base address of a device.
* - If the device size is 0 then this base address has no meaning!!!
*
*
* INPUT: DEVICE device - The device we ask for its base address.
* OUTPUT: N/A
* RETURNS: Device base address.
*********************************************************************/
static unsigned int memoryGetDeviceRegOffset(DEVICE device)
{
switch (device)
{
case DEVICE0:
return CS_0_LOW_DECODE_ADDRESS;
case DEVICE1:
return CS_1_LOW_DECODE_ADDRESS;
case DEVICE2:
return CS_2_LOW_DECODE_ADDRESS;
case DEVICE3:
return CS_3_LOW_DECODE_ADDRESS;
case BOOT_DEVICE:
return BOOTCS_LOW_DECODE_ADDRESS;
}
return CS_0_LOW_DECODE_ADDRESS; /* default value */
}
unsigned int memoryGetDeviceBaseAddress(DEVICE device)
{
unsigned int regBase;
unsigned int regEnd;
unsigned int regOffset=memoryGetDeviceRegOffset(device);
GT_REG_READ(regOffset, ®Base);
GT_REG_READ(regOffset+8, ®End);
if(regEnd<=regBase) return 0xffffffff; /* ERROR !!! */
regBase = regBase << 20;
return regBase;
}
/********************************************************************
* memoryGetBankSize - Returns the size of a memory bank.
*
*
* INPUT: MEMORY_BANK bank - The bank we ask for its size.
* OUTPUT: N/A
* RETURNS: Memory bank size.
*********************************************************************/
unsigned int memoryGetBankSize(MEMORY_BANK bank)
{
unsigned int size,base;
unsigned int highValue;
unsigned int highAddress=memoryGetBankRegOffset(bank)+8;
base = memoryGetBankBaseAddress(bank);
GT_REG_READ(highAddress,&highValue);
highValue = (highValue + 1) << 20;
if(base > highValue)
size=0;
else
size = highValue - base;
return size;
}
/********************************************************************
* memoryGetDeviceSize - Returns the size of a device memory space
*
*
* INPUT: DEVICE device - The device we ask for its base address.
* OUTPUT: N/A
* RETURNS: Size of a device memory space.
*********************************************************************/
unsigned int memoryGetDeviceSize(DEVICE device)
{
unsigned int size,base;
unsigned int highValue;
unsigned int highAddress=memoryGetDeviceRegOffset(device)+8;
base = memoryGetDeviceBaseAddress(device);
GT_REG_READ(highAddress,&highValue);
if (highValue == 0xfff)
{
size = (~base) + 1; /* what the heck is this? */
return size;
}
else
highValue = (highValue + 1) << 20;
if(base > highValue)
size=0;
else
size = highValue - base;
return size;
}
/********************************************************************
* memoryGetDeviceWidth - A device can be with: 1,2,4 or 8 Bytes data width.
* The width is determine in registers: 'Device Parameters'
* registers (0x45c, 0x460, 0x464, 0x468, 0x46c - for each device.
* at bits: [21:20].
*
* INPUT: DEVICE device - Device number
* OUTPUT: N/A
* RETURNS: Device width in Bytes (1,2,4 or 8), 0 if error had occurred.
*********************************************************************/
unsigned int memoryGetDeviceWidth(DEVICE device)
{
unsigned int width;
unsigned int regValue;
GT_REG_READ(DEVICE_BANK0PARAMETERS + device*4,®Value);
width = (regValue & 0x00300000) >> 20;
switch (width)
{
case 0:
return 1;
case 1:
return 2;
case 2:
return 4;
case 3:
return 8;
default:
return 0;
}
}
bool memoryMapBank(MEMORY_BANK bank, unsigned int bankBase,unsigned int bankLength)
{
unsigned int low=0xfff;
unsigned int high=0x0;
unsigned int regOffset=memoryGetBankRegOffset(bank);
if(bankLength!=0) {
low = (bankBase >> 20) & 0xffff;
high=((bankBase+bankLength)>>20)-1;
}
#ifdef DEBUG
{
unsigned int oldLow, oldHigh;
GT_REG_READ(regOffset,&oldLow);
GT_REG_READ(regOffset+8,&oldHigh);
printf("b%d %x-%x->%x-%x\n", bank, oldLow, oldHigh, low, high);
}
#endif
GT_REG_WRITE(regOffset,low);
GT_REG_WRITE(regOffset+8,high);
return true;
}
bool memoryMapDeviceSpace(DEVICE device, unsigned int deviceBase,unsigned int deviceLength)
{
/* TODO: what are appropriate "unmapped" values? */
unsigned int low=0xfff;
unsigned int high=0x0;
unsigned int regOffset=memoryGetDeviceRegOffset(device);
if(deviceLength != 0) {
low=deviceBase>>20;
high=((deviceBase+deviceLength)>>20)-1;
} else {
/* big problems in here... */
/* this will HANG */
}
GT_REG_WRITE(regOffset,low);
GT_REG_WRITE(regOffset+8,high);
return true;
}
/********************************************************************
* memoryMapInternalRegistersSpace - Sets new base address for the internals
* registers.
*
* INPUTS: unsigned int internalRegBase - The new base address.
* RETURNS: true on success, false on failure
*********************************************************************/
bool memoryMapInternalRegistersSpace(unsigned int internalRegBase)
{
unsigned int currentValue;
unsigned int internalValue = internalRegBase;
internalRegBase = (internalRegBase >> 20);
GT_REG_READ(INTERNAL_SPACE_DECODE,¤tValue);
internalRegBase = (currentValue & 0xffff0000) | internalRegBase;
GT_REG_WRITE(INTERNAL_SPACE_DECODE,internalRegBase);
INTERNAL_REG_BASE_ADDR = internalValue;
return true;
}
/********************************************************************
* memoryGetInternalRegistersSpace - Gets internal registers Base Address.
*
* INPUTS: unsigned int internalRegBase - The new base address.
* RETURNS: true on success, false on failure
*********************************************************************/
unsigned int memoryGetInternalRegistersSpace(void)
{
return INTERNAL_REG_BASE_ADDR;
}
/********************************************************************
* memorySetProtectRegion - This function modifys one of the 8 regions with
* one of the three protection mode.
* - Be advised to check the spec before modifying them.
*
*
* Inputs: CPU_PROTECT_REGION - one of the eight regions.
* CPU_ACCESS - general access.
* CPU_WRITE - read only access.
* CPU_CACHE_PROTECT - chache access.
* we defining CPU because there is another protect from the pci SIDE.
* Returns: false if one of the parameters is wrong and true else
*********************************************************************/
bool memorySetProtectRegion(MEMORY_PROTECT_REGION region,
MEMORY_ACCESS memAccess,
MEMORY_ACCESS_WRITE memWrite,
MEMORY_CACHE_PROTECT cacheProtection,
unsigned int baseAddress,
unsigned int regionLength)
{
unsigned int protectHigh = baseAddress + regionLength;
if(regionLength == 0) /* closing the region */
{
GT_REG_WRITE(CPU_LOW_PROTECT_ADDRESS_0 + 0x10*region,0x0000ffff);
GT_REG_WRITE(CPU_HIGH_PROTECT_ADDRESS_0 + 0x10*region,0);
return true;
}
baseAddress = (baseAddress & 0xfff00000) >> 20;
baseAddress = baseAddress | memAccess << 16 | memWrite << 17
| cacheProtection << 18;
GT_REG_WRITE(CPU_LOW_PROTECT_ADDRESS_0 + 0x10*region,baseAddress);
protectHigh = (protectHigh & 0xfff00000) >> 20;
GT_REG_WRITE(CPU_HIGH_PROTECT_ADDRESS_0 + 0x10*region,protectHigh - 1);
return true;
}
/********************************************************************
* memorySetRegionSnoopMode - This function modifys one of the 4 regions which
* supports Cache Coherency.
*
*
* Inputs: SNOOP_REGION region - One of the four regions.
* SNOOP_TYPE snoopType - There is four optional Types:
* 1. No Snoop.
* 2. Snoop to WT region.
* 3. Snoop to WB region.
* 4. Snoop & Invalidate to WB region.
* unsigned int baseAddress - Base Address of this region.
* unsigned int topAddress - Top Address of this region.
* Returns: false if one of the parameters is wrong and true else
*********************************************************************/
bool memorySetRegionSnoopMode(MEMORY_SNOOP_REGION region,
MEMORY_SNOOP_TYPE snoopType,
unsigned int baseAddress,
unsigned int regionLength)
{
unsigned int snoopXbaseAddress;
unsigned int snoopXtopAddress;
unsigned int data;
unsigned int snoopHigh = baseAddress + regionLength;
if( (region > MEM_SNOOP_REGION3) || (snoopType > MEM_SNOOP_WB) )
return false;
snoopXbaseAddress = SNOOP_BASE_ADDRESS_0 + 0x10 * region;
snoopXtopAddress = SNOOP_TOP_ADDRESS_0 + 0x10 * region;
if(regionLength == 0) /* closing the region */
{
GT_REG_WRITE(snoopXbaseAddress,0x0000ffff);
GT_REG_WRITE(snoopXtopAddress,0);
return true;
}
baseAddress = baseAddress & 0xffff0000;
data = (baseAddress >> 16) | snoopType << 16;
GT_REG_WRITE(snoopXbaseAddress,data);
snoopHigh = (snoopHigh & 0xfff00000) >> 20;
GT_REG_WRITE(snoopXtopAddress,snoopHigh - 1);
return true;
}
/********************************************************************
* memoryRemapAddress - This fubction used for address remapping.
*
*
* Inputs: regOffset: remap register
* remapValue :
* Returns: false if one of the parameters is erroneous,true otherwise.
*********************************************************************/
bool memoryRemapAddress(unsigned int remapReg, unsigned int remapValue)
{
unsigned int valueForReg;
valueForReg = (remapValue & 0xfff00000) >> 20;
GT_REG_WRITE(remapReg, valueForReg);
return true;
}
/********************************************************************
* memoryGetDeviceParam - This function used for getting device parameters from
* DEVICE BANK PARAMETERS REGISTER
*
*
* Inputs: - deviceParam: STRUCT with paramiters for DEVICE BANK
* PARAMETERS REGISTER
* - deviceNum : number of device
* Returns: false if one of the parameters is erroneous,true otherwise.
*********************************************************************/
bool memoryGetDeviceParam(DEVICE_PARAM *deviceParam, DEVICE deviceNum)
{
unsigned int valueOfReg;
unsigned int calcData;
GT_REG_READ(DEVICE_BANK0PARAMETERS + 4 * deviceNum, &valueOfReg);
calcData = (0x7 & valueOfReg) + ((0x400000 & valueOfReg) >> 19);
deviceParam -> turnOff = calcData; /* Turn Off */
calcData = ((0x78 & valueOfReg) >> 3) + ((0x800000 & valueOfReg) >> 19);
deviceParam -> acc2First = calcData; /* Access To First */
calcData = ((0x780 & valueOfReg) >> 7) + ((0x1000000 & valueOfReg) >> 20);
deviceParam -> acc2Next = calcData; /* Access To Next */
calcData = ((0x3800 & valueOfReg) >> 11) + ((0x2000000 & valueOfReg) >> 22);
deviceParam -> ale2Wr = calcData; /* Ale To Write */
calcData = ((0x1c000 & valueOfReg) >> 14) + ((0x4000000 & valueOfReg) >> 23);
deviceParam -> wrLow = calcData; /* Write Active */
calcData = ((0xe0000 & valueOfReg) >> 17) + ((0x8000000 & valueOfReg) >> 24);
deviceParam -> wrHigh = calcData; /* Write High */
calcData = ((0x300000 & valueOfReg) >> 20);
switch (calcData)
{
case 0:
deviceParam -> deviceWidth = 1; /* one Byte - 8-bit */
break;
case 1:
deviceParam -> deviceWidth = 2; /* two Bytes - 16-bit */
break;
case 2:
deviceParam -> deviceWidth = 4; /* four Bytes - 32-bit */
break;
case 3:
deviceParam -> deviceWidth = 8; /* eight Bytes - 64-bit */
break;
default:
deviceParam -> deviceWidth = 1;
break;
}
return true;
}
/********************************************************************
* memorySetDeviceParam - This function used for setting device parameters to
* DEVICE BANK PARAMETERS REGISTER
*
*
* Inputs: - deviceParam: STRUCT for store paramiters from DEVICE BANK
* PARAMETERS REGISTER
* - deviceNum : number of device
* Returns: false if one of the parameters is erroneous,true otherwise.
*********************************************************************/
bool memorySetDeviceParam(DEVICE_PARAM *deviceParam, DEVICE deviceNum)
{
unsigned int valueForReg;
if((deviceParam -> turnOff >= 0xf) || (deviceParam -> acc2First >= 0x1f) ||
(deviceParam -> acc2Next >= 0x1f) || (deviceParam -> ale2Wr >= 0xf) ||
(deviceParam -> wrLow >= 0xf) || (deviceParam -> wrHigh >= 0xf))
return false;
valueForReg = (((deviceParam -> turnOff) & 0x7) |
(((deviceParam -> turnOff) & 0x8) << 19) |
(((deviceParam -> acc2First) & 0xf) << 3) |
(((deviceParam -> acc2First) & 0x10) << 19) |
(((deviceParam -> acc2Next) & 0xf) << 7) |
(((deviceParam -> acc2Next) & 0x10) << 20) |
(((deviceParam -> ale2Wr) & 0x7) << 11) |
(((deviceParam -> ale2Wr) & 0xf) << 22) |
(((deviceParam -> wrLow) & 0x7) << 14) |
(((deviceParam -> wrLow) & 0xf) << 23) |
(((deviceParam -> wrHigh) & 0x7) << 17) |
(((deviceParam -> wrHigh) & 0xf) << 24));
/* insert the device width: */
switch(deviceParam->deviceWidth)
{
case 1:
valueForReg = valueForReg | _8BIT;
break;
case 2:
valueForReg = valueForReg | _16BIT;
break;
case 4:
valueForReg = valueForReg | _32BIT;
break;
case 8:
valueForReg = valueForReg | _64BIT;
break;
default:
valueForReg = valueForReg | _8BIT;
break;
}
GT_REG_WRITE(DEVICE_BANK0PARAMETERS + 4 * deviceNum, valueForReg);
return true;
}
