2 This file declares PciCfg PPI used to access PCI configuration space in PEI
4 Copyright (c) 2006, Intel Corporation
5 All rights reserved. This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
15 @par Revision Reference:
16 This PPI is defined in PEI CIS
21 #ifndef __PEI_PCI_CFG_H__
22 #define __PEI_PCI_CFG_H__
24 #define EFI_PEI_PCI_CFG_PPI_INSTALLED_GUID \
26 0xe1f2eba0, 0xf7b9, 0x4a26, {0x86, 0x20, 0x13, 0x12, 0x21, 0x64, 0x2a, 0x90 } \
29 typedef struct _EFI_PEI_PCI_CFG_PPI EFI_PEI_PCI_CFG_PPI
;
31 #define PEI_PCI_CFG_ADDRESS(bus, dev, func, reg) ( \
32 (UINT64) ((((UINTN) bus) << 24) + (((UINTN) dev) << 16) + (((UINTN) func) << 8) + ((UINTN) reg)) \
33 ) & 0x00000000ffffffff
36 PCI read and write operation.
38 @param PeiServices An indirect pointer to the PEI Services Table
39 published by the PEI Foundation.
40 @param This Pointer to local data for the interface.
41 @param Width The width of the access. Enumerated in bytes.
42 @param Address The physical address of the access.
43 @param Buffer A pointer to the buffer of data.
45 @retval EFI_SUCCESS The function completed successfully.
46 @retval EFI_NOT_YET_AVAILABLE The service has not been installed.
51 (EFIAPI
*EFI_PEI_PCI_CFG_PPI_IO
) (
52 IN EFI_PEI_SERVICES
**PeiServices
,
53 IN EFI_PEI_PCI_CFG_PPI
*This
,
54 IN EFI_PEI_PCI_CFG_PPI_WIDTH Width
,
60 PCI read-modify-write operation.
62 @param PeiServices An indirect pointer to the PEI Services Table
63 published by the PEI Foundation.
64 @param This Pointer to local data for the interface.
65 @param Width The width of the access. Enumerated in bytes.
66 @param Address The physical address of the access.
67 @param SetBits Value of the bits to set.
68 @param ClearBits Value of the bits to clear.
70 @retval EFI_SUCCESS The function completed successfully.
75 (EFIAPI
*EFI_PEI_PCI_CFG_PPI_RW
) (
76 IN EFI_PEI_SERVICES
**PeiServices
,
77 IN EFI_PEI_PCI_CFG_PPI
*This
,
78 IN EFI_PEI_PCI_CFG_PPI_WIDTH Width
,
86 The EFI_PEI_PCI_CFG_PPI interfaces are used to abstract accesses to PCI
87 controllers behind a PCI root bridge controller.
90 PCI read services. See the Read() function description.
93 PCI write services. See the Write() function description.
96 PCI read-modify-write services. See the Modify() function description.
99 struct _EFI_PEI_PCI_CFG_PPI
{
100 EFI_PEI_PCI_CFG_PPI_IO Read
;
101 EFI_PEI_PCI_CFG_PPI_IO Write
;
102 EFI_PEI_PCI_CFG_PPI_RW Modify
;
105 extern EFI_GUID gEfiPciCfgPpiInServiceTableGuid
;