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/** @file
Functions for access I2C MMIO register.
Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef __I2C_IOLIB_PEI__
#define __I2C_IOLIB_PEI__
#include <PiPei.h>
/**
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.
**/
UINT8
EFIAPI
I2CLibPeiMmioRead8 (
IN UINTN Address
);
/**
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().
If Address is not aligned on a 16-bit boundary, then ASSERT().
@param Address The MMIO register to read.
@return The value read.
**/
UINT16
EFIAPI
I2CLibPeiMmioRead16 (
IN UINTN 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().
If Address is not aligned on a 16-bit boundary, then ASSERT().
@param Address The MMIO register to write.
@param Value The value to write to the MMIO register.
@return Value.
**/
UINT16
EFIAPI
I2CLibPeiMmioWrite16 (
IN UINTN Address,
IN UINT16 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().
If Address is not aligned on a 32-bit boundary, then ASSERT().
@param Address The MMIO register to read.
@return The value read.
**/
UINT32
EFIAPI
I2CLibPeiMmioRead32 (
IN UINTN 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().
If Address is not aligned on a 32-bit boundary, then ASSERT().
@param Address The MMIO register to write.
@param Value The value to write to the MMIO register.
@return Value.
**/
UINT32
EFIAPI
I2CLibPeiMmioWrite32 (
IN UINTN Address,
IN UINT32 Value
);
/**
OR a 32-bit MMIO register.
OR 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().
If Address is not aligned on a 32-bit boundary, then ASSERT().
@param Address The MMIO register to write OR.
@param Value The value to OR to the MMIO register.
@return Value.
**/
UINT32
EFIAPI
I2CLibPeiMmioOr32 (
IN UINTN Address,
IN UINT32 OrData
);
#endif
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