EFI_STATUS
PcatPciRootBridgeParseBars (
IN PCAT_PCI_ROOT_BRIDGE_INSTANCE *PrivateData,
IN UINT16 Command,
IN UINTN Bus,
IN UINTN Device,
IN UINTN Function
)
/*++
Routine Description:
Arguments:
Returns:
None
--*/
{
EFI_STATUS Status;
UINT64 Address;
UINT32 OriginalValue;
UINT32 Value;
UINT32 OriginalUpperValue;
UINT32 UpperValue;
UINT64 Mask;
UINTN Offset;
UINT64 Base;
UINT64 Length;
UINT64 Limit;
for (Offset = 0x10; Offset < 0x28; Offset += 4) {
Address = EFI_PCI_ADDRESS (Bus, Device, Function, Offset);
Status = PcatPciRootBridgeBarExisted (
PrivateData,
Address,
&OriginalValue,
&Value
);
if (!EFI_ERROR (Status )) {
if ( Value & 0x01 ) {
if (Command & 0x0001) {
//
//Device I/Os
//
Mask = 0xfffffffc;
Base = OriginalValue & Mask;
Length = ((~(Value & Mask)) & Mask) + 0x04;
if (!(Value & 0xFFFF0000)){
Length &= 0x0000FFFF;
}
Limit = Base + Length - 1;
if (Base < Limit) {
if (PrivateData->IoBase > Base) {
PrivateData->IoBase = (UINT32)Base;
}
if (PrivateData->IoLimit < Limit) {
PrivateData->IoLimit = (UINT32)Limit;
}
}
}
} else {
if (Command & 0x0002) {
Mask = 0xfffffff0;
Base = OriginalValue & Mask;
Length = Value & Mask;
if ((Value & 0x07) != 0x04) {
Length = ((~Length) + 1) & 0xffffffff;
} else {
Offset += 4;
Address = EFI_PCI_ADDRESS (Bus, Device, Function, Offset);
Status = PcatPciRootBridgeBarExisted (
PrivateData,
Address,
&OriginalUpperValue,
&UpperValue
);
Base = Base | LShiftU64((UINT64)OriginalUpperValue,32);
Length = Length | LShiftU64((UINT64)UpperValue,32);
Length = (~Length) + 1;
}
Limit = Base + Length - 1;
if (Base < Limit) {
if (PrivateData->MemBase > Base) {
PrivateData->MemBase = Base;
}
if (PrivateData->MemLimit < Limit) {
PrivateData->MemLimit = Limit;
}
switch (Value &0x07) {
case 0x00: ////memory space; anywhere in 32 bit address space
if (Value & 0x08) {
if (PrivateData->Pmem32Base > Base) {
PrivateData->Pmem32Base = Base;
}
if (PrivateData->Pmem32Limit < Limit) {
PrivateData->Pmem32Limit = Limit;
}
} else {
if (PrivateData->Mem32Base > Base) {
PrivateData->Mem32Base = Base;
}
if (PrivateData->Mem32Limit < Limit) {
PrivateData->Mem32Limit = Limit;
}
}
break;
case 0x04: //memory space; anywhere in 64 bit address space
if (Value & 0x08) {
if (PrivateData->Pmem64Base > Base) {
PrivateData->Pmem64Base = Base;
}
if (PrivateData->Pmem64Limit < Limit) {
PrivateData->Pmem64Limit = Limit;
}
} else {
if (PrivateData->Mem64Base > Base) {
PrivateData->Mem64Base = Base;
}
if (PrivateData->Mem64Limit < Limit) {
PrivateData->Mem64Limit = Limit;
}
}
break;
}
}
}
}
}
}
return EFI_SUCCESS;
}
/**
Parse PCI bar and collect the assigned PCI resouce information.
@param[in] Command Supported attributes.
@param[in] Bus PCI bus number.
@param[in] Device PCI device number.
@param[in] Function PCI function number.
@param[in] BarOffsetBase PCI bar start offset.
@param[in] BarOffsetEnd PCI bar end offset.
@param[in] Io IO aperture.
@param[in] Mem MMIO aperture.
@param[in] MemAbove4G MMIO aperture above 4G.
@param[in] PMem Prefetchable MMIO aperture.
@param[in] PMemAbove4G Prefetchable MMIO aperture above 4G.
**/
STATIC
VOID
PcatPciRootBridgeParseBars (
IN UINT16 Command,
IN UINTN Bus,
IN UINTN Device,
IN UINTN Function,
IN UINTN BarOffsetBase,
IN UINTN BarOffsetEnd,
IN PCI_ROOT_BRIDGE_APERTURE *Io,
IN PCI_ROOT_BRIDGE_APERTURE *Mem,
IN PCI_ROOT_BRIDGE_APERTURE *MemAbove4G,
IN PCI_ROOT_BRIDGE_APERTURE *PMem,
IN PCI_ROOT_BRIDGE_APERTURE *PMemAbove4G
)
{
UINT32 OriginalValue;
UINT32 Value;
UINT32 OriginalUpperValue;
UINT32 UpperValue;
UINT64 Mask;
UINTN Offset;
UINTN LowBit;
UINT64 Base;
UINT64 Length;
UINT64 Limit;
PCI_ROOT_BRIDGE_APERTURE *MemAperture;
for (Offset = BarOffsetBase; Offset < BarOffsetEnd; Offset += sizeof (UINT32)) {
PcatPciRootBridgeBarExisted (
PCI_LIB_ADDRESS (Bus, Device, Function, Offset),
&OriginalValue, &Value
);
if (Value == 0) {
continue;
}
if ((Value & BIT0) == BIT0) {
//
// IO Bar
//
if (Command & EFI_PCI_COMMAND_IO_SPACE) {
Mask = 0xfffffffc;
Base = OriginalValue & Mask;
Length = ((~(Value & Mask)) & Mask) + 0x04;
if (!(Value & 0xFFFF0000)) {
Length &= 0x0000FFFF;
}
Limit = Base + Length - 1;
if ((Base > 0) && (Base < Limit)) {
if (Io->Base > Base) {
Io->Base = Base;
}
if (Io->Limit < Limit) {
Io->Limit = Limit;
}
}
}
} else {
//
// Mem Bar
//
if (Command & EFI_PCI_COMMAND_MEMORY_SPACE) {
Mask = 0xfffffff0;
Base = OriginalValue & Mask;
Length = Value & Mask;
if ((Value & (BIT1 | BIT2)) == 0) {
//
// 32bit
//
Length = ((~Length) + 1) & 0xffffffff;
if ((Value & BIT3) == BIT3) {
MemAperture = PMem;
} else {
MemAperture = Mem;
}
} else {
//
// 64bit
//
Offset += 4;
PcatPciRootBridgeBarExisted (
PCI_LIB_ADDRESS (Bus, Device, Function, Offset),
&OriginalUpperValue,
&UpperValue
);
Base = Base | LShiftU64 ((UINT64) OriginalUpperValue, 32);
Length = Length | LShiftU64 ((UINT64) UpperValue, 32);
if (Length != 0) {
LowBit = LowBitSet64 (Length);
Length = LShiftU64 (1ULL, LowBit);
}
if ((Value & BIT3) == BIT3) {
MemAperture = PMemAbove4G;
} else {
MemAperture = MemAbove4G;
}
}
Limit = Base + Length - 1;
if ((Base > 0) && (Base < Limit)) {
if (MemAperture->Base > Base) {
MemAperture->Base = Base;
}
if (MemAperture->Limit < Limit) {
MemAperture->Limit = Limit;
}
}
}
}
}
}