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/** @file
Copyright (c) 2006 - 2007, Intel Corporation
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.
Module Name:
PciCfg.c
Abstract:
Single Segment Pci Configuration PPI
Revision History
**/
#include "PciCfgInternal.h"
/**
PCI read operation.
@param PeiServices An indirect pointer to the PEI Services Table
published by the PEI Foundation.
@param This Pointer to local data for the interface.
@param Width The width of the access. Enumerated in bytes.
@param Address The physical address of the access.
@param Buffer A pointer to the buffer of data.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER Unsupported width
enumeration.
**/
EFI_STATUS
EFIAPI
PciCfgRead (
IN EFI_PEI_SERVICES **PeiServices,
IN EFI_PEI_PCI_CFG_PPI *This,
IN EFI_PEI_PCI_CFG_PPI_WIDTH Width,
IN UINT64 Address,
IN OUT VOID *Buffer
)
{
UINTN PciLibAddress;
PciLibAddress = PciCfgAddressConvert ((EFI_PEI_PCI_CFG_PPI_PCI_ADDRESS *) &Address);
if (Width == EfiPeiPciCfgWidthUint8) {
*((UINT8 *) Buffer) = PciRead8 (PciLibAddress);
} else if (Width == EfiPeiPciCfgWidthUint16) {
if ((PciLibAddress & 0x01) == 0) {
//
// Aligned Pci address access
//
WriteUnaligned16 (((UINT16 *) Buffer), PciRead16 (PciLibAddress));
} else {
//
// Unaligned Pci address access, break up the request into byte by byte.
//
*((UINT8 *) Buffer) = PciRead8 (PciLibAddress);
*((UINT8 *) Buffer + 1) = PciRead8 (PciLibAddress + 1);
}
} else if (Width == EfiPeiPciCfgWidthUint32) {
if ((PciLibAddress & 0x03) == 0) {
//
// Aligned Pci address access
//
WriteUnaligned32 (((UINT32 *) Buffer), PciRead32 (PciLibAddress));
} else if ((PciLibAddress & 0x01) == 0) {
//
// Unaligned Pci address access, break up the request into word by word.
//
WriteUnaligned16 (((UINT16 *) Buffer), PciRead16 (PciLibAddress));
WriteUnaligned16 (((UINT16 *) Buffer + 1), PciRead16 (PciLibAddress + 2));
} else {
//
// Unaligned Pci address access, break up the request into byte by byte.
//
*((UINT8 *) Buffer) = PciRead8 (PciLibAddress);
*((UINT8 *) Buffer + 1) = PciRead8 (PciLibAddress + 1);
*((UINT8 *) Buffer + 2) = PciRead8 (PciLibAddress + 2);
*((UINT8 *) Buffer + 3) = PciRead8 (PciLibAddress + 3);
}
} else {
return EFI_INVALID_PARAMETER;
}
return EFI_SUCCESS;
}
/**
PCI write operation.
@param PeiServices An indirect pointer to the PEI Services Table
published by the PEI Foundation.
@param This Pointer to local data for the interface.
@param Width The width of the access. Enumerated in bytes.
@param Address The physical address of the access.
@param Buffer A pointer to the buffer of data.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER Unsupported width
enumeration.
**/
EFI_STATUS
EFIAPI
PciCfgWrite (
IN EFI_PEI_SERVICES **PeiServices,
IN EFI_PEI_PCI_CFG_PPI *This,
IN EFI_PEI_PCI_CFG_PPI_WIDTH Width,
IN UINT64 Address,
IN OUT VOID *Buffer
)
{
UINTN PciLibAddress;
PciLibAddress = PciCfgAddressConvert ((EFI_PEI_PCI_CFG_PPI_PCI_ADDRESS *) &Address);
if (Width == EfiPeiPciCfgWidthUint8) {
PciWrite8 (PciLibAddress, *((UINT8 *) Buffer));
} else if (Width == EfiPeiPciCfgWidthUint16) {
if ((PciLibAddress & 0x01) == 0) {
//
// Aligned Pci address access
//
PciWrite16 (PciLibAddress, ReadUnaligned16 ((UINT16 *) Buffer));
} else {
//
// Unaligned Pci address access, break up the request into byte by byte.
//
PciWrite8 (PciLibAddress, *((UINT8 *) Buffer));
PciWrite8 (PciLibAddress + 1, *((UINT8 *) Buffer + 1));
}
} else if (Width == EfiPeiPciCfgWidthUint32) {
if ((PciLibAddress & 0x03) == 0) {
//
// Aligned Pci address access
//
PciWrite32 (PciLibAddress, ReadUnaligned32 ((UINT32 *) Buffer));
} else if ((PciLibAddress & 0x01) == 0) {
//
// Unaligned Pci address access, break up the request into word by word.
//
PciWrite16 (PciLibAddress, ReadUnaligned16 ((UINT16 *) Buffer));
PciWrite16 (PciLibAddress + 2, ReadUnaligned16 ((UINT16 *) Buffer + 1));
} else {
//
// Unaligned Pci address access, break up the request into byte by byte.
//
PciWrite8 (PciLibAddress, *((UINT8 *) Buffer));
PciWrite8 (PciLibAddress + 1, *((UINT8 *) Buffer + 1));
PciWrite8 (PciLibAddress + 2, *((UINT8 *) Buffer + 2));
PciWrite8 (PciLibAddress + 3, *((UINT8 *) Buffer + 3));
}
} else {
return EFI_INVALID_PARAMETER;
}
return EFI_SUCCESS;
}
/**
PCI read-modify-write operation.
@param PeiServices An indirect pointer to the PEI Services Table
published by the PEI Foundation.
@param This Pointer to local data for the interface.
@param Width The width of the access. Enumerated in bytes.
@param Address The physical address of the access.
@param SetBits Value of the bits to set.
@param ClearBits Value of the bits to clear.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER Unsupported width
enumeration.
**/
EFI_STATUS
EFIAPI
PciCfgModify (
IN EFI_PEI_SERVICES **PeiServices,
IN EFI_PEI_PCI_CFG_PPI *This,
IN EFI_PEI_PCI_CFG_PPI_WIDTH Width,
IN UINT64 Address,
IN UINTN SetBits,
IN UINTN ClearBits
)
{
UINTN PciLibAddress;
PciLibAddress = PciCfgAddressConvert ((EFI_PEI_PCI_CFG_PPI_PCI_ADDRESS *) &Address);
if (Width == EfiPeiPciCfgWidthUint8) {
PciAndThenOr8 (PciLibAddress, (UINT8)~ClearBits, (UINT8)SetBits);
} else if (Width == EfiPeiPciCfgWidthUint16) {
if ((PciLibAddress & 0x01) == 0) {
//
// Aligned Pci address access
//
PciAndThenOr16 (PciLibAddress, (UINT16)~ClearBits, (UINT16)SetBits);
} else {
//
// Unaligned Pci address access, break up the request into byte by byte.
//
PciAndThenOr8 (PciLibAddress, (UINT8)~ClearBits, (UINT8)SetBits);
PciAndThenOr8 (PciLibAddress + 1, (UINT8)~(ClearBits >> 8), (UINT8)(SetBits >> 8));
}
} else if (Width == EfiPeiPciCfgWidthUint32) {
if ((PciLibAddress & 0x03) == 0) {
//
// Aligned Pci address access
//
PciAndThenOr32 (PciLibAddress, (UINT32)~ClearBits, (UINT32)SetBits);
} else if ((PciLibAddress & 0x01) == 0) {
//
// Unaligned Pci address access, break up the request into word by word.
//
PciAndThenOr16 (PciLibAddress, (UINT16)~ClearBits, (UINT16)SetBits);
PciAndThenOr16 (PciLibAddress + 2, (UINT16)~(ClearBits >> 16), (UINT16)(SetBits >> 16));
} else {
//
// Unaligned Pci address access, break up the request into byte by byte.
//
PciAndThenOr8 (PciLibAddress, (UINT8)~ClearBits, (UINT8)SetBits);
PciAndThenOr8 (PciLibAddress + 1, (UINT8)~(ClearBits >> 8), (UINT8)(SetBits >> 8));
PciAndThenOr8 (PciLibAddress + 2, (UINT8)~(ClearBits >> 16), (UINT8)(SetBits >> 16));
PciAndThenOr8 (PciLibAddress + 3, (UINT8)~(ClearBits >> 24), (UINT8)(SetBits >> 24));
}
} else {
return EFI_INVALID_PARAMETER;
}
return EFI_SUCCESS;
}
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