/**
Reads a 16-bit I/O port.
Reads the 16-bit I/O port specified by Port. The 16-bit read value is returned.
This function must guarantee that all I/O read and write operations are
serialized.
If 16-bit I/O port operations are not supported, then ASSERT().
If Port is not aligned on a 16-bit boundary, then ASSERT().
@param Port The I/O port to read.
@return The value read.
**/
UINT16
EFIAPI
IoRead16 (
IN UINTN Port
)
{
UINT16 Value;
ASSERT ((Port & 1) == 0);
_ReadWriteBarrier ();
Value = _inpw ((UINT16)Port);
_ReadWriteBarrier ();
return Value;
}
bool _stdcall GetPortVal(WORD wPortAddr, PDWORD pdwPortVal, BYTE bSize)
{
tagPort32Struct Port32Struct;
DWORD dwBytesReturned;
if (!IsWinIoInitialized)
return false;
if (IsNT)
{
switch (bSize)
{
case 1:
*pdwPortVal = _inp(wPortAddr);
break;
case 2:
*pdwPortVal = _inpw(wPortAddr);
break;
case 4:
*pdwPortVal = _inpd(wPortAddr);
break;
}
}
else
{
Port32Struct.bSize = bSize;
Port32Struct.wPortAddr = wPortAddr;
return DeviceIoControl(hDriver, WINIO_READPORT, &Port32Struct, sizeof(Port32Struct),
pdwPortVal, sizeof(DWORD), &dwBytesReturned, NULL);
}
return true;
}
WORD pci_read_word(WORD bus, WORD dev, WORD func, BYTE offset )
{
WORD target = func + ((dev & 0x1F) << 3) + ((bus & 0xFF) << 8) ;
_outpd( 0xCF8, (DWORD)( target << 8 ) | 0x80000000UL | ((DWORD)offset & ~3 ) );
return (WORD)_inpw( 0xCFC + (offset & 0x2) );
}
ushort InPortWord(ushort port)
{
return _inpw(port);
}
unsigned short MSVCRT__inpw(
unsigned short port)
{
return _inpw(port);
}