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audk/EdkCompatibilityPkg/Foundation/Library/Pei/Include/PeiLib.h

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/*++
Copyright (c) 2004 - 2007, Intel Corporation
All rights reserved. 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.
Module Name:
PeiLib.h
Abstract:
PEI Library Functions
--*/
#ifndef _PEI_LIB_H_
#define _PEI_LIB_H_
#include "Tiano.h"
#include "Pei.h"
#include "PeiHobLib.h"
#include "PeiPerf.h"
#include EFI_PROTOCOL_DEFINITION (Decompress)
#include EFI_PROTOCOL_DEFINITION (TianoDecompress)
#include EFI_GUID_DEFINITION (PeiPeCoffLoader)
#include EFI_PPI_DEFINITION (FindFv)
#if (PI_SPECIFICATION_VERSION >= 0x00010000)
typedef struct {
UINT32 PeiServiceTable;
} PEI_IDT_TABLE;
VOID *
EFIAPI
ScanGuid (
IN VOID *Buffer,
IN UINTN Length,
IN EFI_GUID *Guid
)
/*++
Routine Description:
Scans a target buffer for a GUID, and returns a pointer to the matching GUID
in the target buffer.
This function searches target the buffer specified by Buffer and Length from
the lowest address to the highest address at 128-bit increments for the 128-bit
GUID value that matches Guid. If a match is found, then a pointer to the matching
GUID in the target buffer is returned. If no match is found, then NULL is returned.
If Length is 0, then NULL is returned.
If Length > 0 and Buffer is NULL, then ASSERT().
If Buffer is not aligned on a 32-bit boundary, then ASSERT().
If Length is not aligned on a 128-bit boundary, then ASSERT().
If Length is greater than (EFI_MAX_ADDRESS ?Buffer + 1), then ASSERT().
Arguments:
Buffer - Pointer to the target buffer to scan.
Length - Number of bytes in Buffer to scan.
Guid - Value to search for in the target buffer.
Returns:
A pointer to the matching Guid in the target buffer or NULL otherwise.
--*/
;
VOID *
EFIAPI
InvalidateInstructionCacheRange (
IN VOID *Address,
IN UINTN Length
)
/*++
Routine Description:
Invalidates a range of instruction cache lines in the cache coherency domain
of the calling CPU.
Invalidates the instruction cache lines specified by Address and Length. If
Address is not aligned on a cache line boundary, then entire instruction
cache line containing Address is invalidated. If Address + Length is not
aligned on a cache line boundary, then the entire instruction cache line
containing Address + Length -1 is invalidated. This function may choose to
invalidate the entire instruction cache if that is more efficient than
invalidating the specified range. If Length is 0, the no instruction cache
lines are invalidated. Address is returned.
If Length is greater than (EFI_MAX_ADDRESS - Address + 1), then ASSERT().
Arguments:
Address - The base address of the instruction cache lines to
invalidate. If the CPU is in a physical addressing mode, then
Address is a physical address. If the CPU is in a virtual
addressing mode, then Address is a virtual address.
Length - The number of bytes to invalidate from the instruction cache.
Returns:
Address
**/
;
EFI_STATUS
EFIAPI
PeiLibFfsFindNextVolume (
IN UINTN Instance,
IN OUT EFI_PEI_FV_HANDLE *VolumeHandle
)
/*++
Routine Description:
The wrapper of Pei Core Service function FfsFindNextVolume.
Arguments:
Instance - The Fv Volume Instance.
VolumeHandle - Pointer to the current Fv Volume to search.
Returns:
EFI_STATUS
--*/
;
EFI_STATUS
EFIAPI
PeiLibFfsFindNextFile (
IN EFI_FV_FILETYPE SearchType,
IN EFI_PEI_FV_HANDLE FwVolHeader,
IN OUT EFI_PEI_FILE_HANDLE *FileHeader
)
/*++
Routine Description:
The wrapper of Pei Core Service function FfsFindNextFile.
Arguments:
SearchType - Filter to find only file of this type.
FwVolHeader - Pointer to the current FV to search.
FileHandle - Pointer to the file matching SearchType in FwVolHeader.
- NULL if file not found
Returns:
EFI_STATUS
--*/
;
EFI_STATUS
EFIAPI
PeiLibFfsFindFileByName (
IN EFI_GUID *FileName,
IN EFI_PEI_FV_HANDLE VolumeHandle,
OUT EFI_PEI_FILE_HANDLE *FileHandle
)
/*++
Routine Description:
The wrapper of Pei Core Service function FfsFindFileByName.
Arguments:
FileName - File name to search.
VolumeHandle - The current FV to search.
FileHandle - Pointer to the file matching name in VolumeHandle.
- NULL if file not found
Returns:
EFI_STATUS
--*/
;
EFI_STATUS
EFIAPI
PeiLibFfsFindSectionData (
IN EFI_SECTION_TYPE SectionType,
IN EFI_FFS_FILE_HEADER *FfsFileHeader,
IN OUT VOID **SectionData
)
/*++
Routine Description:
The wrapper of Pei Core Service function FfsFindSectionData.
Arguments:
SearchType - Filter to find only sections of this type.
FileHandle - Pointer to the current file to search.
SectionData - Pointer to the Section matching SectionType in FfsFileHeader.
- NULL if section not found
Returns:
EFI_STATUS
--*/
;
EFI_STATUS
EFIAPI
PeiLibFfsGetVolumeInfo (
IN EFI_PEI_FV_HANDLE *VolumeHandle,
OUT EFI_FV_INFO *VolumeInfo
)
/*++
Routine Description:
The wrapper of Pei Core Service function FfsGetVolumeInfo.
Arguments:
VolumeHandle - The handle to Fv Volume.
VolumeInfo - The pointer to volume information.
Returns:
EFI_STATUS
--*/
;
EFI_STATUS
EFIAPI
PeiServicesLocatePpi (
IN EFI_GUID *Guid,
IN UINTN Instance,
IN OUT EFI_PEI_PPI_DESCRIPTOR **PpiDescriptor,
IN OUT VOID **Ppi
)
/*++
Routine Description:
The wrapper of Pei Core Service function LocatePpi.
Arguments:
Guid - Pointer to GUID of the PPI.
Instance - Instance Number to discover.
PpiDescriptor - Pointer to reference the found descriptor. If not NULL,
returns a pointer to the descriptor (includes flags, etc)
Ppi - Pointer to reference the found PPI
Returns:
Status - EFI_SUCCESS if the PPI is in the database
EFI_NOT_FOUND if the PPI is not in the database
--*/
;
VOID
EFIAPI
BuildFvHob (
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length
)
/*++
Routine Description:
Build FvHob.
Arguments:
BaseAddress - Fv base address.
Length - Fv Length.
Returns:
NONE.
--*/
;
VOID
EFIAPI
BuildFvHob2 (
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length,
IN EFI_GUID *FvNameGuid,
IN EFI_GUID *FileNameGuid
)
/*++
Routine Description:
Build FvHob2.
Arguments:
BaseAddress - Fv base address.
Length - Fv length.
FvNameGuid - Fv name.
FileNameGuid - File name which contians encapsulated Fv.
Returns:
NONE.
--*/
;
VOID
EFIAPI
BuildGuidDataHob (
IN EFI_GUID *Guid,
IN VOID *Data,
IN UINTN DataLength
)
/*++
Routine Description:
Build Guid data Hob.
Arguments:
Guid - guid to build data hob.
Data - data to build data hob.
DataLength - the length of data.
Returns:
NONE
--*/
;
VOID *
EFIAPI
AllocatePages (
IN UINTN Pages
)
/*++
Routine Description:
Allocate Memory.
Arguments:
Pages - Pages to allocate.
Returns:
Address if successful to allocate memory.
NULL if fail to allocate memory.
--*/
;
VOID
SetPeiServicesTablePointer (
IN EFI_PEI_SERVICES **PeiServices
)
/*++
Routine Description:
Save PeiService pointer so that it can be retrieved anywhere.
Arguments:
PeiServices - The direct pointer to PeiServiceTable.
Returns:
NONE
--*/
;
EFI_PEI_SERVICES **
GetPeiServicesTablePointer (
VOID
)
/*++
Routine Description:
Get PeiService pointer.
Arguments:
NONE.
Returns:
The direct pointer to PeiServiceTable.
--*/
;
VOID
MigrateIdtTable (
IN EFI_PEI_SERVICES **PeiServices
)
/*++
Routine Description:
Migrate IDT from CAR to real memory where preceded with 4 bytes for
storing PeiService pointer.
Arguments:
PeiServices - The direct pointer to PeiServiceTable.
Returns:
NONE.
--*/
;
UINTN
ReadIdtBase (
VOID
)
/*++
Routine Description:
Read IDT Register BaseAddress.
Arguments:
NONE
Returns:
IDT Register BaseAddress.
--*/
;
UINT16
ReadIdtLimit (
VOID
)
/*++
Routine Description:
Read IDT Register Limit.
Arguments:
NONE
Returns:
IDT Register Limit.
--*/
;
VOID
SetIdtBase (
UINT32 IdtBase,
UINT16 IdtLimit
)
/*++
Routine Description:
Set IDT Register BaseAddress.
Arguments:
IdtBase - IDT.BaseAddress
IdtLimit - IDT.Limit
Returns:
NONE
--*/
;
VOID
AsmWriteKr7 (
UINT64 Address
)
/*++
Routine Description:
Write 64 bit into Kernel Register7 on IPF.
Arguments:
Address - Data to write into kr7.
Returns:
NONE
--*/
;
UINT64
AsmReadKr7 (
VOID
)
/*++
Routine Description:
Read 64 bit from Kernel Register7 on IPF.
Arguments:
NONE
Returns:
Data in kr7.
--*/
;
#endif
VOID
PeiCopyMem (
IN VOID *Destination,
IN VOID *Source,
IN UINTN Length
)
/*++
Routine Description:
Copy Length bytes from Source to Destination.
Arguments:
Destination - Target of copy
Source - Place to copy from
Length - Number of bytes to copy
Returns:
None
--*/
;
VOID
ZeroMem (
IN VOID *Buffer,
IN UINTN Size
)
/*++
Routine Description:
Set Buffer to zero for Size bytes.
Arguments:
Buffer - Memory to set.
Size - Number of bytes to set
Returns:
None
--*/
;
VOID
CopyMem (
IN VOID *Destination,
IN VOID *Source,
IN UINTN Length
)
/*++
Routine Description:
Copy Length bytes from Source to Destination.
Arguments:
Destination - Target of copy
Source - Place to copy from
Length - Number of bytes to copy
Returns:
None
--*/
;
BOOLEAN
CompareGuid (
IN EFI_GUID *Guid1,
IN EFI_GUID *Guid2
)
/*++
Routine Description:
Compares two GUIDs
Arguments:
Guid1 - guid to compare
Guid2 - guid to compare
Returns:
= TRUE if Guid1 == Guid2
= FALSE if Guid1 != Guid2
--*/
;
EFI_STATUS
InstallEfiPeiPeCoffLoader (
IN EFI_PEI_SERVICES **PeiServices,
IN EFI_PEI_PE_COFF_LOADER_PROTOCOL **This,
IN EFI_PEI_PPI_DESCRIPTOR *ThisPpi
)
/*++
Routine Description:
Install EFI Pei PE coff loader protocol.
Arguments:
PeiServices - The PEI core services table.
This - Pointer to get Pei PE coff loader protocol as output
ThisPpi - Passed in as EFI_NT_LOAD_AS_DLL_PPI on NT_EMULATOR platform
Returns:
EFI_SUCCESS
--*/
;
EFI_STATUS
InstallEfiPeiPeCoffLoader64 (
IN EFI_PEI_SERVICES **PeiServices,
IN OUT EFI_PEI_PE_COFF_LOADER_PROTOCOL **This,
IN EFI_PEI_PPI_DESCRIPTOR *ThisPpi
);
EFI_STATUS
InstallEfiDecompress (
EFI_DECOMPRESS_PROTOCOL **This
)
/*++
Routine Description:
Install EFI decompress protocol.
Arguments:
This - Pointer to get decompress protocol as output
Returns:
EFI_SUCCESS - EFI decompress protocol successfully installed.
--*/
;
EFI_STATUS
InstallTianoDecompress (
EFI_TIANO_DECOMPRESS_PROTOCOL **This
)
/*++
Routine Description:
Install Tiano decompress protocol.
Arguments:
This - Pointer to get decompress protocol as output
Returns:
EFI_SUCCESS - Tiano decompress protocol successfully installed.
--*/
;
EFI_STATUS
GetTimerValue (
OUT UINT64 *TimerValue
)
/*++
Routine Description:
Get timer value.
Arguments:
TimerValue - Pointer to the returned timer value
Returns:
EFI_SUCCESS - Successfully got timer value
--*/
;
#ifdef EFI_NT_EMULATOR
EFI_STATUS
PeCoffLoaderWinNtLoadAsDll (
IN CHAR8 *PdbFileName,
IN VOID **ImageEntryPoint,
OUT VOID **ModHandle
)
/*++
Routine Description:
Loads the .DLL file is present when a PE/COFF file is loaded. This provides source level
debugging for drivers that have cooresponding .DLL files on the local system.
Arguments:
PdbFileName - The name of the .PDB file. This was found from the PE/COFF
file's debug directory entry.
ImageEntryPoint - A pointer to the DLL entry point of the .DLL file was loaded.
ModHandle - Pointer to loaded library.
Returns:
EFI_SUCCESS - The .DLL file was loaded, and the DLL entry point is returned in ImageEntryPoint
EFI_NOT_FOUND - The .DLL file could not be found
EFI_UNSUPPORTED - The .DLL file was loaded, but the entry point to the .DLL file could not
determined.
--*/
;
#endif
//
// hob.c
//
EFI_STATUS
PeiBuildHobModule (
IN EFI_PEI_SERVICES **PeiServices,
IN EFI_GUID *ModuleName,
IN EFI_PHYSICAL_ADDRESS Module,
IN UINT64 ModuleLength,
IN EFI_PHYSICAL_ADDRESS EntryPoint
)
/*++
Routine Description:
Builds a HOB for a loaded PE32 module
Arguments:
PeiServices - The PEI core services table.
ModuleName - The GUID File Name of the module
Memory - The 64 bit physical address of the module
ModuleLength - The length of the module in bytes
EntryPoint - The 64 bit physical address of the entry point
to the module
Returns:
EFI_SUCCESS - Hob is successfully built.
Others - Errors occur while creating new Hob
--*/
;
EFI_STATUS
PeiBuildHobResourceDescriptor (
IN EFI_PEI_SERVICES **PeiServices,
IN EFI_RESOURCE_TYPE ResourceType,
IN EFI_RESOURCE_ATTRIBUTE_TYPE ResourceAttribute,
IN EFI_PHYSICAL_ADDRESS PhysicalStart,
IN UINT64 NumberOfBytes
)
/*++
Routine Description:
Builds a HOB that describes a chunck of system memory
Arguments:
PeiServices - The PEI core services table.
ResourceType - The type of resource described by this HOB
ResourceAttribute - The resource attributes of the memory described by this HOB
PhysicalStart - The 64 bit physical address of memory described by this HOB
NumberOfBytes - The length of the memoty described by this HOB in bytes
Returns:
EFI_SUCCESS - Hob is successfully built.
Others - Errors occur while creating new Hob
--*/
;
EFI_STATUS
PeiBuildHobGuid (
IN EFI_PEI_SERVICES **PeiServices,
IN EFI_GUID *Guid,
IN UINTN DataLength,
IN OUT VOID **Hob
)
/*++
Routine Description:
Builds a custom HOB that is tagged with a GUID for identification
Arguments:
PeiServices - The PEI core services table.
Guid - The GUID of the custome HOB type
DataLength - The size of the data payload for the GUIDed HOB
Hob - Pointer to the Hob
Returns:
EFI_SUCCESS - Hob is successfully built.
Others - Errors occur while creating new Hob
--*/
;
EFI_STATUS
PeiBuildHobGuidData (
IN EFI_PEI_SERVICES **PeiServices,
IN EFI_GUID *Guid,
IN VOID *Data,
IN UINTN DataLength
)
/*++
Routine Description:
Builds a custom HOB that is tagged with a GUID for identification
Arguments:
PeiServices - The PEI core services table.
Guid - The GUID of the custome HOB type
Data - The data to be copied into the GUIDed HOB data field.
DataLength - The data field length.
Returns:
EFI_SUCCESS - Hob is successfully built.
Others - Errors occur while creating new Hob
--*/
;
EFI_STATUS
PeiBuildHobFv (
IN EFI_PEI_SERVICES **PeiServices,
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length
)
/*++
Routine Description:
Builds a Firmware Volume HOB
Arguments:
PeiServices - The PEI core services table.
BaseAddress - The base address of the Firmware Volume
Length - The size of the Firmware Volume in bytes
Returns:
EFI_SUCCESS - Hob is successfully built.
Others - Errors occur while creating new Hob
--*/
;
EFI_STATUS
PeiBuildHobCpu (
IN EFI_PEI_SERVICES **PeiServices,
IN UINT8 SizeOfMemorySpace,
IN UINT8 SizeOfIoSpace
)
/*++
Routine Description:
Builds a HOB for the CPU
Arguments:
PeiServices - The PEI core services table.
SizeOfMemorySpace - Identifies the maximum
physical memory addressibility of the processor.
SizeOfIoSpace - Identifies the maximum physical I/O addressibility
of the processor.
Returns:
EFI_SUCCESS - Hob is successfully built.
Others - Errors occur while creating new Hob
--*/
;
EFI_STATUS
PeiBuildHobStack (
IN EFI_PEI_SERVICES **PeiServices,
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length
)
/*++
Routine Description:
Builds a HOB for the Stack
Arguments:
PeiServices - The PEI core services table.
BaseAddress - The 64 bit physical address of the Stack
Length - The length of the stack in bytes
Returns:
EFI_SUCCESS - Hob is successfully built.
Others - Errors occur while creating new Hob
--*/
;
EFI_STATUS
PeiBuildHobBspStore (
IN EFI_PEI_SERVICES **PeiServices,
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length,
IN EFI_MEMORY_TYPE MemoryType
)
/*++
Routine Description:
Builds a HOB for the bsp store
Arguments:
PeiServices - The PEI core services table.
BaseAddress - The 64 bit physical address of the bsp store
Length - The length of the bsp store in bytes
MemoryType - Memory type
Returns:
EFI_SUCCESS - Hob is successfully built.
Others - Errors occur while creating new Hob
--*/
;
EFI_STATUS
PeiBuildHobMemoryAllocation (
IN EFI_PEI_SERVICES **PeiServices,
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length,
IN EFI_GUID *Name,
IN EFI_MEMORY_TYPE MemoryType
)
/*++
Routine Description:
Builds a HOB for the memory allocation
Arguments:
PeiServices - The PEI core services table.
BaseAddress - The 64 bit physical address of the memory
Length - The length of the memory allocation in bytes
Name - Name for Hob
MemoryType - Memory type
Returns:
EFI_SUCCESS - Hob is successfully built.
Others - Errors occur while creating new Hob
--*/
;
//
// print.c
//
UINTN
AvSPrint (
OUT CHAR8 *StartOfBuffer,
IN UINTN StrSize,
IN CONST CHAR8 *Format,
IN VA_LIST Marker
)
/*++
Routine Description:
AvSPrint function to process format and place the results in Buffer. Since a
VA_LIST is used this rountine allows the nesting of Vararg routines. Thus
this is the main print working routine
Arguments:
StartOfBuffer - Ascii buffer to print the results of the parsing of Format into.
StrSize - Maximum number of characters to put into buffer. Zero means
no limit.
FormatString - Ascii format string see file header for more details.
Marker - Vararg list consumed by processing Format.
Returns:
Number of characters printed.
--*/
;
UINTN
ASPrint (
OUT CHAR8 *Buffer,
IN UINTN BufferSize,
IN CONST CHAR8 *Format,
...
)
/*++
Routine Description:
ASPrint function to process format and place the results in Buffer.
Arguments:
Buffer - Ascii buffer to print the results of the parsing of Format into.
BufferSize - Maximum number of characters to put into buffer. Zero means no
limit.
Format - Ascii format string see file header for more details.
... - Vararg list consumed by processing Format.
Returns:
Number of characters printed.
--*/
;
//
// math.c
//
UINT64
MultU64x32 (
IN UINT64 Multiplicand,
IN UINTN Multiplier
)
/*++
Routine Description:
This routine allows a 64 bit value to be multiplied with a 32 bit
value returns 64bit result.
No checking if the result is greater than 64bits
Arguments:
Multiplicand - multiplicand
Multiplier - multiplier
Returns:
Multiplicand * Multiplier
--*/
;
UINT64
DivU64x32 (
IN UINT64 Dividend,
IN UINTN Divisor,
OUT UINTN *Remainder OPTIONAL
)
/*++
Routine Description:
This routine allows a 64 bit value to be divided with a 32 bit value returns
64bit result and the Remainder.
N.B. only works for 31bit divisors!!
Arguments:
Dividend - dividend
Divisor - divisor
Remainder - buffer for remainder
Returns:
Dividend / Divisor
Remainder = Dividend mod Divisor
--*/
;
UINT64
RShiftU64 (
IN UINT64 Operand,
IN UINTN Count
)
/*++
Routine Description:
This routine allows a 64 bit value to be right shifted by 32 bits and returns the
shifted value.
Count is valid up 63. (Only Bits 0-5 is valid for Count)
Arguments:
Operand - Value to be shifted
Count - Number of times to shift right.
Returns:
Value shifted right identified by the Count.
--*/
;
UINT64
LShiftU64 (
IN UINT64 Operand,
IN UINTN Count
)
/*++
Routine Description:
This routine allows a 64 bit value to be left shifted by 32 bits and
returns the shifted value.
Count is valid up 63. (Only Bits 0-5 is valid for Count)
Arguments:
Operand - Value to be shifted
Count - Number of times to shift left.
Returns:
Value shifted left identified by the Count.
--*/
;
VOID
RegisterNativeCpuIo (
IN EFI_PEI_SERVICES **PeiServices,
IN VOID *CpuIo
)
/*++
Routine Description:
Register a native Cpu IO
Arguments:
PeiServices - Calling context
CpuIo - CpuIo instance to register
Returns:
None
--*/
;
VOID
GetNativeCpuIo (
IN EFI_PEI_SERVICES **PeiServices,
OUT VOID **CpuIo
)
/*++
Routine Description:
Get registered Cpu IO.
Arguments:
PeiServices - Calling context
CpuIo - CpuIo instance registered before
Returns:
None
--*/
;
EFI_STATUS
EFIAPI
FindFv (
IN EFI_FIND_FV_PPI *This,
IN EFI_PEI_SERVICES **PeiServices,
IN OUT UINT8 *FvNumber,
IN OUT EFI_FIRMWARE_VOLUME_HEADER **FVAddress
)
/*++
Routine Description:
Search Fv in Hob.
Arguments:
This - Interface pointer that implement the Find Fv PPI
PeiServices - Pointer to the PEI Service Table
FvNumber - On input, the number of the fireware volume which supports FFS to locate
On output, the next FV number which supports FFS.
FVAddress - The address of the volume which supports FFS to discover
Returns:
EFI_SUCCESS - An addtional FV which supports FFS found
EFI_OUT_OF_RESOURCES - There are no fireware volume which supports FFS for given fvnumber
EFI_INVALID_PARAMETER - FvAddress is NULL
--*/
;
EFI_STATUS
EFIAPI
PeiLibPciCfgModify (
IN EFI_PEI_SERVICES **PeiServices,
IN PEI_PCI_CFG_PPI *PciCfg,
IN PEI_PCI_CFG_PPI_WIDTH Width,
IN UINT64 Address,
IN UINTN SetBits,
IN UINTN ClearBits
)
/*++
Routine Description:
PCI read-modify-write operations.
PIWG's PI specification replaces Inte's EFI Specification 1.10.
EFI_PEI_PCI_CFG_PPI defined in Inte's EFI Specification 1.10 is replaced by
EFI_PEI_PCI_CFG2_PPI in PI 1.0. "Modify" function in these two PPI are not
compatibile with each other.
For Framework code that make the following call:
PciCfg->Modify (
PeiServices,
PciCfg,
Width,
Address,
SetBits,
ClearBits
);
it will be updated to the following code which call this library API:
PeiLibPciCfgModify (
PeiServices,
PciCfg,
Width,
Address,
SetBits,
ClearBits
);
The
Arguments:
PeiServices An indirect pointer to the PEI Services Table
published by the PEI Foundation.
PciCfg A pointer to the this pointer of EFI_PEI_PCI_CFG_PPI.
This parameter is unused as a place holder to make
the parameter list identical to PEI_PCI_CFG_PPI_RW.
Width The width of the access. Enumerated in bytes. Type
EFI_PEI_PCI_CFG_PPI_WIDTH is defined in Read().
Address The physical address of the access.
SetBits Points to value to bitwise-OR with the read configuration value.
The size of the value is determined by Width.
ClearBits Points to the value to negate and bitwise-AND with the read configuration value.
The size of the value is determined by Width.
Returns:
EFI_SUCCESS The function completed successfully.
EFI_DEVICE_ERROR There was a problem with the transaction.
--*/
;
#endif
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