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/** @file
This file declares PciCfg2 PPI.
This ppi Provides platform or chipset-specific access to
the PCI configuration space for a specific PCI segment.
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
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.
@par Revision Reference:
This PPI is introduced in PI Version 1.0.
**/
#ifndef __PEI_PCI_CFG2_H__
#define __PEI_PCI_CFG2_H__
#include <Library/BaseLib.h>
#define EFI_PEI_PCI_CFG2_PPI_GUID \
{ 0x57a449a, 0x1fdc, 0x4c06, { 0xbf, 0xc9, 0xf5, 0x3f, 0x6a, 0x99, 0xbb, 0x92 } }
typedef struct _EFI_PEI_PCI_CFG2_PPI EFI_PEI_PCI_CFG2_PPI;
#define EFI_PEI_PCI_CFG_ADDRESS(bus,dev,func,reg) \
(UINT64) ( \
(((UINTN) bus) << 24) | \
(((UINTN) dev) << 16) | \
(((UINTN) func) << 8) | \
(((UINTN) (reg)) < 256 ? ((UINTN) (reg)) : (UINT64) (LShiftU64 ((UINT64) (reg), 32))))
///
/// EFI_PEI_PCI_CFG_PPI_WIDTH
///
typedef enum {
///
/// 8-bit access
///
EfiPeiPciCfgWidthUint8 = 0,
///
/// 16-bit access
///
EfiPeiPciCfgWidthUint16 = 1,
///
/// 32-bit access
///
EfiPeiPciCfgWidthUint32 = 2,
///
/// 64-bit access
///
EfiPeiPciCfgWidthUint64 = 3,
EfiPeiPciCfgWidthMaximum
} EFI_PEI_PCI_CFG_PPI_WIDTH;
///
/// EFI_PEI_PCI_CFG_PPI_PCI_ADDRESS
///
typedef struct {
///
/// 8-bit register offset within the PCI configuration space for a given device's function
/// space.
///
UINT8 Register;
///
/// Only the 3 least-significant bits are used to encode one of 8 possible functions within a
/// given device.
///
UINT8 Function;
///
/// Only the 5 least-significant bits are used to encode one of 32 possible devices.
///
UINT8 Device;
///
/// 8-bit value to encode between 0 and 255 buses.
///
UINT8 Bus;
///
/// Register number in PCI configuration space. If this field is zero, then Register is used
/// for the register number. If this field is non-zero, then Register is ignored and this field
/// is used for the register number.
///
UINT32 ExtendedRegister;
} EFI_PEI_PCI_CFG_PPI_PCI_ADDRESS;
/**
Reads from or write to a given location in the PCI configuration space.
@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_DEVICE_ERROR There was a problem with the transaction.
@retval EFI_DEVICE_NOT_READY The device is not capable of supporting the operation at this
time.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_PEI_PCI_CFG2_PPI_IO)(
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
);
/**
Performs a read-modify-write operation on the contents
from a given location in the PCI configuration space.
@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_DEVICE_ERROR There was a problem with the transaction.
@retval EFI_DEVICE_NOT_READY The device is not capable of supporting
the operation at this time.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_PEI_PCI_CFG2_PPI_RW)(
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
);
///
/// The EFI_PEI_PCI_CFG_PPI interfaces are used to abstract accesses to PCI
/// controllers behind a PCI root bridge controller.
///
struct _EFI_PEI_PCI_CFG2_PPI {
EFI_PEI_PCI_CFG2_PPI_IO Read;
EFI_PEI_PCI_CFG2_PPI_IO Write;
EFI_PEI_PCI_CFG2_PPI_RW Modify;
///
/// The PCI bus segment which the specified functions will access.
///
UINT16 Segment;
};
extern EFI_GUID gEfiPciCfg2PpiGuid;
#endif
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