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/** @file
The default version of EFI_PEI_PCI_CFG2_PPI support published by PeiServices in
PeiCore initialization phase.
EFI_PEI_PCI_CFG2_PPI is installed by the PEIM which supports a PCI root bridge.
When PeiCore is started, the default version of EFI_PEI_PCI_CFG2_PPI will be assigned
to PeiServices table.
Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "PeiMain.h"
///
/// This default instance of EFI_PEI_PCI_CFG2_PPI install assigned to EFI_PEI_SERVICE.PciCfg
/// when PeiCore's initialization.
///
EFI_PEI_PCI_CFG2_PPI gPeiDefaultPciCfg2Ppi = {
PeiDefaultPciCfg2Read,
PeiDefaultPciCfg2Write,
PeiDefaultPciCfg2Modify
};
/**
Reads from a given location in the PCI configuration space.
If the EFI_PEI_PCI_CFG2_PPI is not installed by platform/chipset PEIM, then
return EFI_NOT_YET_AVAILABLE.
@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.
See EFI_PEI_PCI_CFG_PPI_WIDTH above.
@param Address The physical address of the access. The format of
the address is described by EFI_PEI_PCI_CFG_PPI_PCI_ADDRESS.
@param Buffer A pointer to the buffer of data.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER The invalid access width.
@retval EFI_NOT_YET_AVAILABLE If the EFI_PEI_PCI_CFG2_PPI is not installed by platform/chipset PEIM.
**/
EFI_STATUS
EFIAPI
PeiDefaultPciCfg2Read (
IN CONST EFI_PEI_SERVICES **PeiServices,
IN CONST EFI_PEI_PCI_CFG2_PPI *This,
IN EFI_PEI_PCI_CFG_PPI_WIDTH Width,
IN UINT64 Address,
IN OUT VOID *Buffer
)
{
return EFI_NOT_AVAILABLE_YET;
}
/**
Write to a given location in the PCI configuration space.
If the EFI_PEI_PCI_CFG2_PPI is not installed by platform/chipset PEIM, then
return EFI_NOT_YET_AVAILABLE.
@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.
See EFI_PEI_PCI_CFG_PPI_WIDTH above.
@param Address The physical address of the access. The format of
the address is described by EFI_PEI_PCI_CFG_PPI_PCI_ADDRESS.
@param Buffer A pointer to the buffer of data.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER The invalid access width.
@retval EFI_NOT_YET_AVAILABLE If the EFI_PEI_PCI_CFG2_PPI is not installed by platform/chipset PEIM.
**/
EFI_STATUS
EFIAPI
PeiDefaultPciCfg2Write (
IN CONST EFI_PEI_SERVICES **PeiServices,
IN CONST EFI_PEI_PCI_CFG2_PPI *This,
IN EFI_PEI_PCI_CFG_PPI_WIDTH Width,
IN UINT64 Address,
IN OUT VOID *Buffer
)
{
return EFI_NOT_AVAILABLE_YET;
}
/**
This function performs a read-modify-write operation on the contents from a given
location in the PCI configuration space.
If the EFI_PEI_PCI_CFG2_PPI is not installed by platform/chipset PEIM, then
return EFI_NOT_YET_AVAILABLE.
@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. Type
EFI_PEI_PCI_CFG_PPI_WIDTH is defined in Read().
@param Address The physical address of the access.
@param SetBits Points to value to bitwise-OR with the read configuration value.
The size of the value is determined by Width.
@param ClearBits Points to the value to negate and bitwise-AND with the read configuration value.
The size of the value is determined by Width.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER The invalid access width.
@retval EFI_NOT_YET_AVAILABLE If the EFI_PEI_PCI_CFG2_PPI is not installed by platform/chipset PEIM.
**/
EFI_STATUS
EFIAPI
PeiDefaultPciCfg2Modify (
IN CONST EFI_PEI_SERVICES **PeiServices,
IN CONST EFI_PEI_PCI_CFG2_PPI *This,
IN EFI_PEI_PCI_CFG_PPI_WIDTH Width,
IN UINT64 Address,
IN VOID *SetBits,
IN VOID *ClearBits
)
{
return EFI_NOT_AVAILABLE_YET;
}
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