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