/** @file
Module produces PciCfgPpi2 on top of PciCfgPpi. It also updates the
PciCfg2Ppi pointer in the EFI_PEI_SERVICES upon a installation of
EcpPeiPciCfgPpi.
EcpPeiPciCfgPpi is installed by a framework module which
produce PciCfgPpi originally. Such framework module is updated based on the
following rule to install EcpPeiPciCfgPpi instead of updating the PciCfg pointer
in the Framework PeiServicesTable:
Search pattern:
PeiServices->PciCfg = <*>;
Replace pattern:
{
static EFI_PEI_PPI_DESCRIPTOR gEcpPeiPciCfgPpiList = {
(EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
&gEcpPeiPciCfgPpiGuid,
<*>
};
(**PeiServices).InstallPpi (PeiServices, gEcpPeiPciCfgPpiList);
}
In addition, the PeiServicesTable definition in PeiApi.h is updated to
struct _EFI_PEI_SERVICES {
EFI_TABLE_HEADER Hdr;
...
//
// Pointer to PPI interface
//
if (PI_SPECIFICATION_VERSION < 0x00010000)
PEI_CPU_IO_PPI *CpuIo;
ECP_PEI_PCI_CFG_PPI *PciCfg; //Changed.
else
...
endif
};
This change enable the detection of code segment which invokes PeiServices->PciCfg->Modify.
Such code causes a build break as ECP_PEI_PCI_CFG_PPI does not has "Modify" field.
This should be updated to a call to PeiLibPciCfgModify as shown below:
Search pattern:
*->Modify(<*>);
Replace pattern:
PeiLibPciCfgModify(<*>);
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.
This module produces PciCfgPpi on top of PciCfgPpi2. This module is used on platform when both of
these two conditions are true:
1) Framework module present that produces PCI CFG PPI AND
2) PI module that produces PCI CFG2 is not present
Copyright (c) 2006 - 2010, 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.
**/
#include <PiPei.h>
#include <Ppi/PciCfg.h>
#include <Ppi/PciCfg2.h>
#include <Ppi/EcpPciCfg.h>
#include <Library/DebugLib.h>
//
// Function Prototypes
//
/**
Notification service to be called when gEcpPeiPciCfgPpiGuid is installed.
@param PeiServices Indirect reference to the PEI Services Table.
@param NotifyDescriptor Address of the notification descriptor data structure. Type
EFI_PEI_NOTIFY_DESCRIPTOR is defined above.
@param Ppi Address of the PPI that was installed.
@retval EFI_STATUS This function will install a PPI to PPI database. The status
code will be the code for (*PeiServices)->InstallPpi.
**/
EFI_STATUS
EFIAPI
EcpPciCfgPpiNotifyCallback (
IN EFI_PEI_SERVICES **PeiServices,
IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDescriptor,
IN VOID *Ppi
);
//
// Function Prototypes
//
/**
Reads 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.
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.
**/
EFI_STATUS
EFIAPI
PciCfg2Read (
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
);
/**
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.
**/
EFI_STATUS
EFIAPI
PciCfg2Write (
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
);
/**
PCI read-modify-write operation.
@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.
**/
EFI_STATUS
EFIAPI
PciCfg2Modify (
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
);
//
// Module globals
//
EFI_PEI_NOTIFY_DESCRIPTOR mNotifyOnEcpPciCfgList = {
(EFI_PEI_PPI_DESCRIPTOR_NOTIFY_CALLBACK | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
&gEcpPeiPciCfgPpiGuid,
EcpPciCfgPpiNotifyCallback
};
EFI_PEI_PCI_CFG2_PPI mPciCfg2Ppi = {
PciCfg2Read,
PciCfg2Write,
PciCfg2Modify,
0
};
EFI_PEI_PPI_DESCRIPTOR mPpiListPciCfg2 = {
(EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
&gEfiPciCfg2PpiGuid,
&mPciCfg2Ppi
};
/**
Standard PEIM entry point.
@param FileHandle Handle of the file being invoked.
@param PeiServices General purpose services available to every PEIM.
@retval EFI_SUCCESS The interface could be successfully installed.
**/
EFI_STATUS
EFIAPI
PeimInitializePciCfg2 (
IN EFI_PEI_FILE_HANDLE FileHandle,
IN CONST EFI_PEI_SERVICES **PeiServices
)
{
EFI_STATUS Status;
VOID *Ppi;
//
// Make sure no other module has install the first instance of gEfiPciCfg2PpiGuid.
//
Status = (*PeiServices)->LocatePpi (PeiServices, &gEfiPciCfg2PpiGuid, 0, NULL, &Ppi);
ASSERT (Status == EFI_NOT_FOUND);
//
// Register a notification for ECP PCI CFG PPI
//
Status = (*PeiServices)->NotifyPpi (PeiServices, &mNotifyOnEcpPciCfgList);
ASSERT_EFI_ERROR (Status);
return Status;
}
/**
Notification service to be called when gEcpPeiPciCfgPpiGuid is installed.
@param PeiServices Indirect reference to the PEI Services Table.
@param NotifyDescriptor Address of the notification descriptor data structure. Type
EFI_PEI_NOTIFY_DESCRIPTOR is defined above.
@param Ppi Address of the PPI that was installed.
@retval EFI_STATUS This function will install a PPI to PPI database. The status
code will be the code for (*PeiServices)->InstallPpi.
**/
EFI_STATUS
EFIAPI
EcpPciCfgPpiNotifyCallback (
IN EFI_PEI_SERVICES **PeiServices,
IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDescriptor,
IN VOID *Ppi
)
{
//
// When ECP PCI CFG PPI is installed, publish the PCI CFG2 PPI in the
// PEI Services Table and the PPI database
//
(*PeiServices)->PciCfg = &mPciCfg2Ppi;
return (*PeiServices)->InstallPpi ((CONST EFI_PEI_SERVICES **)PeiServices, &mPpiListPciCfg2);
}
/**
Reads 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.
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.
**/
EFI_STATUS
EFIAPI
PciCfg2Read (
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
)
{
EFI_STATUS Status;
EFI_PEI_PCI_CFG_PPI *PciCfg;
Status = (*PeiServices)->LocatePpi (
PeiServices,
&gEcpPeiPciCfgPpiGuid,
0,
NULL,
(VOID **)&PciCfg
);
ASSERT_EFI_ERROR (Status);
return PciCfg->Read ((EFI_PEI_SERVICES **)PeiServices, PciCfg, Width, Address, Buffer);
}
/**
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.
**/
EFI_STATUS
EFIAPI
PciCfg2Write (
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
)
{
EFI_STATUS Status;
EFI_PEI_PCI_CFG_PPI *PciCfg;
Status = (*PeiServices)->LocatePpi (
PeiServices,
&gEcpPeiPciCfgPpiGuid,
0,
NULL,
(VOID **)&PciCfg
);
ASSERT_EFI_ERROR (Status);
return PciCfg->Write ((EFI_PEI_SERVICES **)PeiServices, PciCfg, Width, Address, Buffer);
}
/**
PCI read-modify-write operation.
@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.
**/
EFI_STATUS
EFIAPI
PciCfg2Modify (
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
)
{
EFI_STATUS Status;
EFI_PEI_PCI_CFG_PPI *PciCfg;
Status = (*PeiServices)->LocatePpi (
PeiServices,
&gEfiPciCfgPpiInServiceTableGuid,
0,
NULL,
(VOID **)&PciCfg
);
ASSERT_EFI_ERROR (Status);
return PciCfg->Modify ((EFI_PEI_SERVICES **)PeiServices, PciCfg, Width, Address, *(UINTN *)SetBits, *(UINTN *)ClearBits);
}