/**
Performs a bitwise AND of a 16-bit PCI configuration register with a 16-bit
value.
Reads the 16-bit PCI configuration register specified by Address, performs a
bitwise AND between the read result and the value specified by AndData, and
writes the result to the 16-bit PCI configuration register specified by
Address. The value written to the PCI configuration register is returned.
This function must guarantee that all PCI read and write operations are
serialized.
If any reserved bits in Address are set, then ASSERT().
@param Address Address that encodes the PCI Segment, Bus, Device, Function and
Register.
@param AndData The value to AND with the PCI configuration register.
@return The value written back to the PCI configuration register.
**/
UINT16
EFIAPI
PciSegmentAnd16 (
IN UINT64 Address,
IN UINT16 AndData
)
{
return PciSegmentWrite16 (Address, (UINT16) (PciSegmentRead16 (Address) & AndData));
}
/**
Performs a bitwise OR of a 16-bit PCI configuration register with
a 16-bit value.
Reads the 16-bit PCI configuration register specified by Address, performs a
bitwise OR between the read result and the value specified by
OrData, and writes the result to the 16-bit PCI configuration register
specified by Address. The value written to the PCI configuration register is
returned. This function must guarantee that all PCI read and write operations
are serialized.
If any reserved bits in Address are set, then ASSERT().
@param Address Address that encodes the PCI Segment, Bus, Device, Function and
Register.
@param OrData The value to OR with the PCI configuration register.
@return The value written back to the PCI configuration register.
**/
UINT16
EFIAPI
PciSegmentOr16 (
IN UINT64 Address,
IN UINT16 OrData
)
{
return PciSegmentWrite16 (Address, (UINT16) (PciSegmentRead16 (Address) | OrData));
}
/**
Writes a 16-bit PCI configuration register, and saves the value in the S3 script to
be replayed on S3 resume.
Writes the 16-bit PCI configuration register specified by Address with the value specified by Value.
Value is returned. This function must guarantee that all PCI read and write operations are serialized.
If any reserved bits in Address are set, then ASSERT().
If Address is not aligned on a 16-bit boundary, then ASSERT().
@param Address Address that encodes the PCI Segment, Bus, Device, Function, and Register.
@param Value The value to write.
@return The parameter of Value.
**/
UINT16
EFIAPI
S3PciSegmentWrite16 (
IN UINT64 Address,
IN UINT16 Value
)
{
return InternalSavePciSegmentWrite16ValueToBootScript (Address, PciSegmentWrite16 (Address, Value));
}
/**
Reads a bit field in a 16-bit PCI configuration register, performs a bitwise
AND, and writes the result back to the bit field in the 16-bit register.
Reads the 16-bit PCI configuration register specified by Address, performs a
bitwise AND between the read result and the value specified by AndData, and
writes the result to the 16-bit PCI configuration register specified by
Address. The value written to the PCI configuration register is returned.
This function must guarantee that all PCI read and write operations are
serialized. Extra left bits in AndData are stripped.
If any reserved bits in Address are set, then ASSERT().
If StartBit is greater than 15, then ASSERT().
If EndBit is greater than 15, then ASSERT().
If EndBit is less than StartBit, then ASSERT().
@param Address PCI configuration register to write.
@param StartBit The ordinal of the least significant bit in the bit field.
Range 0..15.
@param EndBit The ordinal of the most significant bit in the bit field.
Range 0..15.
@param AndData The value to AND with the PCI configuration register.
@return The value written back to the PCI configuration register.
**/
UINT16
EFIAPI
PciSegmentBitFieldAnd16 (
IN UINT64 Address,
IN UINTN StartBit,
IN UINTN EndBit,
IN UINT16 AndData
)
{
return PciSegmentWrite16 (
Address,
BitFieldAnd16 (PciSegmentRead16 (Address), StartBit, EndBit, AndData)
);
}
/**
Writes a bit field to a PCI configuration register.
Writes Value to the bit field of the PCI configuration register. The bit
field is specified by the StartBit and the EndBit. All other bits in the
destination PCI configuration register are preserved. The new value of the
16-bit register is returned.
If any reserved bits in Address are set, then ASSERT().
If StartBit is greater than 15, then ASSERT().
If EndBit is greater than 15, then ASSERT().
If EndBit is less than StartBit, then ASSERT().
@param Address PCI configuration register to write.
@param StartBit The ordinal of the least significant bit in the bit field.
Range 0..15.
@param EndBit The ordinal of the most significant bit in the bit field.
Range 0..15.
@param Value New value of the bit field.
@return The value written back to the PCI configuration register.
**/
UINT16
EFIAPI
PciSegmentBitFieldWrite16 (
IN UINT64 Address,
IN UINTN StartBit,
IN UINTN EndBit,
IN UINT16 Value
)
{
return PciSegmentWrite16 (
Address,
BitFieldWrite16 (PciSegmentRead16 (Address), StartBit, EndBit, Value)
);
}
/**
Copies the data in a caller supplied buffer to a specified range of PCI
configuration space.
Writes the range of PCI configuration registers specified by StartAddress and
Size from the buffer specified by Buffer. This function only allows the PCI
configuration registers from a single PCI function to be written. Size is
returned. When possible 32-bit PCI configuration write cycles are used to
write from StartAdress to StartAddress + Size. Due to alignment restrictions,
8-bit and 16-bit PCI configuration write cycles may be used at the beginning
and the end of the range.
If StartAddress > 0x0FFFFFFF, then ASSERT().
If ((StartAddress & 0xFFF) + Size) > 0x1000, then ASSERT().
If Size > 0 and Buffer is NULL, then ASSERT().
@param StartAddress Starting Address that encodes the PCI Segment, Bus, Device,
Function and Register.
@param Size Size in bytes of the transfer.
@param Buffer Pointer to a buffer containing the data to write.
@return Size
**/
UINTN
EFIAPI
PciSegmentWriteBuffer (
IN UINT64 StartAddress,
IN UINTN Size,
IN VOID *Buffer
)
{
UINTN ReturnValue;
ASSERT_INVALID_PCI_SEGMENT_ADDRESS (StartAddress, 0);
ASSERT (((StartAddress & 0xFFF) + Size) <= 0x1000);
if (Size == 0) {
return 0;
}
ASSERT (Buffer != NULL);
//
// Save Size for return
//
ReturnValue = Size;
if ((StartAddress & 1) != 0) {
//
// Write a byte if StartAddress is byte aligned
//
PciSegmentWrite8 (StartAddress, *(UINT8*)Buffer);
StartAddress += sizeof (UINT8);
Size -= sizeof (UINT8);
Buffer = (UINT8*)Buffer + 1;
}
if (Size >= sizeof (UINT16) && (StartAddress & 2) != 0) {
//
// Write a word if StartAddress is word aligned
//
PciSegmentWrite16 (StartAddress, *(UINT16*)Buffer);
StartAddress += sizeof (UINT16);
Size -= sizeof (UINT16);
Buffer = (UINT16*)Buffer + 1;
}
while (Size >= sizeof (UINT32)) {
//
// Write as many double words as possible
//
PciSegmentWrite32 (StartAddress, *(UINT32*)Buffer);
StartAddress += sizeof (UINT32);
Size -= sizeof (UINT32);
Buffer = (UINT32*)Buffer + 1;
}
if (Size >= sizeof (UINT16)) {
//
// Write the last remaining word if exist
//
PciSegmentWrite16 (StartAddress, *(UINT16*)Buffer);
StartAddress += sizeof (UINT16);
Size -= sizeof (UINT16);
Buffer = (UINT16*)Buffer + 1;
}
if (Size >= sizeof (UINT8)) {
//
// Write the last remaining byte if exist
//
PciSegmentWrite8 (StartAddress, *(UINT8*)Buffer);
}
return ReturnValue;
}
