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