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/** @file
I/O Library. The implementations are based on EFI_PEI_SERVICE->CpuIo interface.
Copyright (c) 2006, Intel Corporation<BR>
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <PiPei.h>
#include <Library/IoLib.h>
#include <Library/DebugLib.h>
#include <Library/BaseLib.h>
#include <Library/PeiServicesTablePointerLib.h>
/**
Reads an 8-bit I/O port.
Reads the 8-bit I/O port specified by Port. The 8-bit read value is returned.
This function must guarantee that all I/O read and write operations are
serialized.
If 8-bit I/O port operations are not supported, then ASSERT().
@param Port The I/O port to read.
@return The value read from Port.
**/
UINT8
EFIAPI
IoRead8 (
IN UINTN Port
)
{
CONST EFI_PEI_SERVICES **PeiServices;
EFI_PEI_CPU_IO_PPI *CpuIo;
PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
CpuIo = (*PeiServices)->CpuIo;
ASSERT (CpuIo != NULL);
return CpuIo->IoRead8 (PeiServices, CpuIo, (UINT64) Port);
}
/**
Writes an 8-bit I/O port.
Writes the 8-bit I/O port specified by Port with the value specified by Value
and returns Value. This function must guarantee that all I/O read and write
operations are serialized.
If 8-bit I/O port operations are not supported, then ASSERT().
@param Port The I/O port to write.
@param Value The value to write to the I/O port.
@return The value written the I/O port.
**/
UINT8
EFIAPI
IoWrite8 (
IN UINTN Port,
IN UINT8 Value
)
{
CONST EFI_PEI_SERVICES **PeiServices;
EFI_PEI_CPU_IO_PPI *CpuIo;
PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
CpuIo = (*PeiServices)->CpuIo;
ASSERT (CpuIo != NULL);
CpuIo->IoWrite8 (PeiServices, CpuIo, (UINT64) Port, Value);
return Value;
}
/**
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().
@param Port The I/O port to read.
@return The value read from Port.
**/
UINT16
EFIAPI
IoRead16 (
IN UINTN Port
)
{
CONST EFI_PEI_SERVICES **PeiServices;
EFI_PEI_CPU_IO_PPI *CpuIo;
PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
CpuIo = (*PeiServices)->CpuIo;
ASSERT (CpuIo != NULL);
//
// Make sure Port is aligned on a 16-bit boundary.
//
ASSERT ((Port & 1) == 0);
return CpuIo->IoRead16 (PeiServices, CpuIo, (UINT64) Port);
}
/**
Writes a 16-bit I/O port.
Writes the 16-bit I/O port specified by Port with the value specified by Value
and returns Value. 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().
@param Port The I/O port to write.
@param Value The value to write to the I/O port.
@return The value written the I/O port.
**/
UINT16
EFIAPI
IoWrite16 (
IN UINTN Port,
IN UINT16 Value
)
{
CONST EFI_PEI_SERVICES **PeiServices;
EFI_PEI_CPU_IO_PPI *CpuIo;
PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
CpuIo = (*PeiServices)->CpuIo;
ASSERT (CpuIo != NULL);
//
// Make sure Port is aligned on a 16-bit boundary.
//
ASSERT ((Port & 1) == 0);
CpuIo->IoWrite16 (PeiServices, CpuIo, (UINT64) Port, Value);
return Value;
}
/**
Reads a 32-bit I/O port.
Reads the 32-bit I/O port specified by Port. The 32-bit read value is returned.
This function must guarantee that all I/O read and write operations are
serialized.
If 32-bit I/O port operations are not supported, then ASSERT().
@param Port The I/O port to read.
@return The value read from Port.
**/
UINT32
EFIAPI
IoRead32 (
IN UINTN Port
)
{
CONST EFI_PEI_SERVICES **PeiServices;
EFI_PEI_CPU_IO_PPI *CpuIo;
PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
CpuIo = (*PeiServices)->CpuIo;
ASSERT (CpuIo != NULL);
//
// Make sure Port is aligned on a 32-bit boundary.
//
ASSERT ((Port & 3) == 0);
return CpuIo->IoRead32 (PeiServices, CpuIo, (UINT64) Port);
}
/**
Writes a 32-bit I/O port.
Writes the 32-bit I/O port specified by Port with the value specified by Value
and returns Value. This function must guarantee that all I/O read and write
operations are serialized.
If 32-bit I/O port operations are not supported, then ASSERT().
@param Port The I/O port to write.
@param Value The value to write to the I/O port.
@return The value written the I/O port.
**/
UINT32
EFIAPI
IoWrite32 (
IN UINTN Port,
IN UINT32 Value
)
{
CONST EFI_PEI_SERVICES **PeiServices;
EFI_PEI_CPU_IO_PPI *CpuIo;
PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
CpuIo = (*PeiServices)->CpuIo;
ASSERT (CpuIo != NULL);
//
// Make sure Port is aligned on a 32-bit boundary.
//
ASSERT ((Port & 3) == 0);
CpuIo->IoWrite32 (PeiServices, CpuIo, (UINT64) Port, Value);
return Value;
}
/**
Reads a 64-bit I/O port.
Reads the 64-bit I/O port specified by Port. The 64-bit read value is returned.
This function must guarantee that all I/O read and write operations are
serialized.
If 64-bit I/O port operations are not supported, then ASSERT().
@param Port The I/O port to read.
@return The value read from Port.
**/
UINT64
EFIAPI
IoRead64 (
IN UINTN Port
)
{
CONST EFI_PEI_SERVICES **PeiServices;
EFI_PEI_CPU_IO_PPI *CpuIo;
PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
CpuIo = (*PeiServices)->CpuIo;
ASSERT (CpuIo != NULL);
//
// Make sure Port is aligned on a 64-bit boundary.
//
ASSERT ((Port & 7) == 0);
return CpuIo->IoRead64 (PeiServices, CpuIo, (UINT64) Port);
}
/**
Writes a 64-bit I/O port.
Writes the 64-bit I/O port specified by Port with the value specified by Value
and returns Value. This function must guarantee that all I/O read and write
operations are serialized.
If 64-bit I/O port operations are not supported, then ASSERT().
@param Port The I/O port to write.
@param Value The value to write to the I/O port.
@return The value written the I/O port.
**/
UINT64
EFIAPI
IoWrite64 (
IN UINTN Port,
IN UINT64 Value
)
{
CONST EFI_PEI_SERVICES **PeiServices;
EFI_PEI_CPU_IO_PPI *CpuIo;
PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
CpuIo = (*PeiServices)->CpuIo;
ASSERT (CpuIo != NULL);
//
// Make sure Port is aligned on a 64-bit boundary.
//
ASSERT ((Port & 7) == 0);
CpuIo->IoWrite64 (PeiServices, CpuIo, (UINT64) Port, Value);
return Value;;
}
/**
Reads an 8-bit MMIO register.
Reads the 8-bit MMIO register specified by Address. The 8-bit read value is
returned. This function must guarantee that all MMIO read and write
operations are serialized.
If 8-bit MMIO register operations are not supported, then ASSERT().
@param Address The MMIO register to read.
@return The value read from Port.
**/
UINT8
EFIAPI
MmioRead8 (
IN UINTN Address
)
{
CONST EFI_PEI_SERVICES **PeiServices;
EFI_PEI_CPU_IO_PPI *CpuIo;
PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
CpuIo = (*PeiServices)->CpuIo;
ASSERT (CpuIo != NULL);
return CpuIo->MemRead8 (PeiServices, CpuIo, (UINT64) Address);
}
/**
Writes an 8-bit MMIO register.
Writes the 8-bit MMIO register specified by Address with the value specified
by Value and returns Value. This function must guarantee that all MMIO read
and write operations are serialized.
If 8-bit MMIO register operations are not supported, then ASSERT().
@param Address The MMIO register to write.
@param Value The value to write to the MMIO register.
@return The Value written back to Mmio register.
**/
UINT8
EFIAPI
MmioWrite8 (
IN UINTN Address,
IN UINT8 Value
)
{
CONST EFI_PEI_SERVICES **PeiServices;
EFI_PEI_CPU_IO_PPI *CpuIo;
PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
CpuIo = (*PeiServices)->CpuIo;
ASSERT (CpuIo != NULL);
CpuIo->MemWrite8 (PeiServices, CpuIo, (UINT64) Address, Value);
return Value;
}
/**
Reads a 16-bit MMIO register.
Reads the 16-bit MMIO register specified by Address. The 16-bit read value is
returned. This function must guarantee that all MMIO read and write
operations are serialized.
If 16-bit MMIO register operations are not supported, then ASSERT().
@param Address The MMIO register to read.
@return The value read from Address.
**/
UINT16
EFIAPI
MmioRead16 (
IN UINTN Address
)
{
CONST EFI_PEI_SERVICES **PeiServices;
EFI_PEI_CPU_IO_PPI *CpuIo;
PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
CpuIo = (*PeiServices)->CpuIo;
ASSERT (CpuIo != NULL);
//
// Make sure Address is aligned on a 16-bit boundary.
//
ASSERT ((Address & 1) == 0);
return CpuIo->MemRead16 (PeiServices, CpuIo, (UINT64) Address);
}
/**
Writes a 16-bit MMIO register.
Writes the 16-bit MMIO register specified by Address with the value specified
by Value and returns Value. This function must guarantee that all MMIO read
and write operations are serialized.
If 16-bit MMIO register operations are not supported, then ASSERT().
@param Address The MMIO register to write.
@param Value The value to write to the MMIO register.
@return The Value written back to Mmio register
**/
UINT16
EFIAPI
MmioWrite16 (
IN UINTN Address,
IN UINT16 Value
)
{
CONST EFI_PEI_SERVICES **PeiServices;
EFI_PEI_CPU_IO_PPI *CpuIo;
PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
CpuIo = (*PeiServices)->CpuIo;
ASSERT (CpuIo != NULL);
//
// Make sure Address is aligned on a 16-bit boundary.
//
ASSERT ((Address & 1) == 0);
CpuIo->MemWrite16 (PeiServices, CpuIo, (UINT64) Address, Value);
return Value;
}
/**
Reads a 32-bit MMIO register.
Reads the 32-bit MMIO register specified by Address. The 32-bit read value is
returned. This function must guarantee that all MMIO read and write
operations are serialized.
If 32-bit MMIO register operations are not supported, then ASSERT().
@param Address The MMIO register to read.
@return The value read from Address.
**/
UINT32
EFIAPI
MmioRead32 (
IN UINTN Address
)
{
CONST EFI_PEI_SERVICES **PeiServices;
EFI_PEI_CPU_IO_PPI *CpuIo;
PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
CpuIo = (*PeiServices)->CpuIo;
ASSERT (CpuIo != NULL);
//
// Make sure Address is aligned on a 32-bit boundary.
//
ASSERT ((Address & 3) == 0);
return CpuIo->MemRead32 (PeiServices, CpuIo, (UINT64) Address);
}
/**
Writes a 32-bit MMIO register.
Writes the 32-bit MMIO register specified by Address with the value specified
by Value and returns Value. This function must guarantee that all MMIO read
and write operations are serialized.
If 32-bit MMIO register operations are not supported, then ASSERT().
@param Address The MMIO register to write.
@param Value The value to write to the MMIO register.
@return The Value written back to Mmio register
**/
UINT32
EFIAPI
MmioWrite32 (
IN UINTN Address,
IN UINT32 Value
)
{
CONST EFI_PEI_SERVICES **PeiServices;
EFI_PEI_CPU_IO_PPI *CpuIo;
PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
CpuIo = (*PeiServices)->CpuIo;
ASSERT (CpuIo != NULL);
//
// Make sure Address is aligned on a 32-bit boundary.
//
ASSERT ((Address & 3) == 0);
CpuIo->MemWrite32 (PeiServices, CpuIo, (UINT64) Address, Value);
return Value;
}
/**
Reads a 64-bit MMIO register.
Reads the 64-bit MMIO register specified by Address. The 64-bit read value is
returned. This function must guarantee that all MMIO read and write
operations are serialized.
If 64-bit MMIO register operations are not supported, then ASSERT().
@param Address The MMIO register to read.
@return The value read from Address.
**/
UINT64
EFIAPI
MmioRead64 (
IN UINTN Address
)
{
CONST EFI_PEI_SERVICES **PeiServices;
EFI_PEI_CPU_IO_PPI *CpuIo;
PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
CpuIo = (*PeiServices)->CpuIo;
ASSERT (CpuIo != NULL);
//
// Make sure Address is aligned on a 64-bit boundary.
//
ASSERT ((Address & 7) == (sizeof (UINT64) - 1));
return CpuIo->MemRead64 (PeiServices, CpuIo, (UINT64) Address);
}
/**
Writes a 64-bit MMIO register.
Writes the 64-bit MMIO register specified by Address with the value specified
by Value and returns Value. This function must guarantee that all MMIO read
and write operations are serialized.
If 64-bit MMIO register operations are not supported, then ASSERT().
@param Address The MMIO register to write.
@param Value The value to write to the MMIO register.
@return The Value written back to Mmio register
**/
UINT64
EFIAPI
MmioWrite64 (
IN UINTN Address,
IN UINT64 Value
)
{
CONST EFI_PEI_SERVICES **PeiServices;
EFI_PEI_CPU_IO_PPI *CpuIo;
PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
CpuIo = (*PeiServices)->CpuIo;
ASSERT (CpuIo != NULL);
//
// Make sure Address is aligned on a 64-bit boundary.
//
ASSERT ((Address & 7) == 0);
CpuIo->MemWrite64 (PeiServices, CpuIo, (UINT64) Address, Value);
return Value;
}
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