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 EfiPeiPciCfgWidthUint8
= 0,
37 EfiPeiPciCfgWidthUint16
= 1,
38 EfiPeiPciCfgWidthUint32
= 2,
39 EfiPeiPciCfgWidthUint64
= 3,
40 EfiPeiPciCfgWidthMaximum
41 } EFI_PEI_PCI_CFG_PPI_WIDTH
;
49 } EFI_PEI_PCI_CFG_PPI_PCI_ADDRESS
;
52 PCI read and write operation.
54 @param PeiServices An indirect pointer to the PEI Services Table
55 published by the PEI Foundation.
56 @param This Pointer to local data for the interface.
57 @param Width The width of the access. Enumerated in bytes.
58 @param Address The physical address of the access.
59 @param Buffer A pointer to the buffer of data.
61 @retval EFI_SUCCESS The function completed successfully.
62 @retval EFI_NOT_YET_AVAILABLE The service has not been installed.
67 (EFIAPI
*EFI_PEI_PCI_CFG_PPI_IO
) (
68 IN EFI_PEI_SERVICES
**PeiServices
,
69 IN EFI_PEI_PCI_CFG_PPI
*This
,
70 IN EFI_PEI_PCI_CFG_PPI_WIDTH Width
,
76 PCI read-modify-write operation.
78 @param PeiServices An indirect pointer to the PEI Services Table
79 published by the PEI Foundation.
80 @param This Pointer to local data for the interface.
81 @param Width The width of the access. Enumerated in bytes.
82 @param Address The physical address of the access.
83 @param SetBits Value of the bits to set.
84 @param ClearBits Value of the bits to clear.
86 @retval EFI_SUCCESS The function completed successfully.
91 (EFIAPI
*EFI_PEI_PCI_CFG_PPI_RW
) (
92 IN EFI_PEI_SERVICES
**PeiServices
,
93 IN EFI_PEI_PCI_CFG_PPI
*This
,
94 IN EFI_PEI_PCI_CFG_PPI_WIDTH Width
,
101 @par Ppi Description:
102 The EFI_PEI_PCI_CFG_PPI interfaces are used to abstract accesses to PCI
103 controllers behind a PCI root bridge controller.
106 PCI read services. See the Read() function description.
109 PCI write services. See the Write() function description.
112 PCI read-modify-write services. See the Modify() function description.
115 struct _EFI_PEI_PCI_CFG_PPI
{
116 EFI_PEI_PCI_CFG_PPI_IO Read
;
117 EFI_PEI_PCI_CFG_PPI_IO Write
;
118 EFI_PEI_PCI_CFG_PPI_RW Modify
;
121 extern EFI_GUID gEfiPciCfgPpiInServiceTableGuid
;