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01f33f7552
stylish change: remove space between func and brace Signed-off-by: SergeySlice <sergey.slice@gmail.com>
1485 lines
52 KiB
C
1485 lines
52 KiB
C
/** @file
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PCI Segment Library implementation using PCI Root Bridge I/O Protocol.
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Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "PciSegmentLib.h"
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//
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// Global variable to record data of PCI Root Bridge I/O Protocol instances
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//
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PCI_ROOT_BRIDGE_DATA *mPciRootBridgeData = NULL;
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UINTN mNumberOfPciRootBridges = 0;
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/**
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The constructor function caches data of PCI Root Bridge I/O Protocol instances.
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The constructor function locates PCI Root Bridge I/O protocol instances,
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and caches the protocol instances, together with their segment numbers and bus ranges.
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It will ASSERT() if that related operation fails and it will always return EFI_SUCCESS.
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@param ImageHandle The firmware allocated handle for the EFI image.
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@param SystemTable A pointer to the EFI System Table.
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@retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
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**/
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EFI_STATUS
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EFIAPI
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PciSegmentLibConstructor (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_STATUS Status;
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UINTN Index;
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UINTN HandleCount;
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EFI_HANDLE *HandleBuffer;
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EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;
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EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *Descriptors;
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HandleCount = 0;
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HandleBuffer = NULL;
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PciRootBridgeIo = NULL;
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Descriptors = NULL;
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Status = gBS->LocateHandleBuffer (
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ByProtocol,
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&gEfiPciRootBridgeIoProtocolGuid,
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NULL,
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&HandleCount,
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&HandleBuffer
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);
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ASSERT_EFI_ERROR(Status);
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mNumberOfPciRootBridges = HandleCount;
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mPciRootBridgeData = AllocatePool (HandleCount * sizeof (PCI_ROOT_BRIDGE_DATA));
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ASSERT (mPciRootBridgeData != NULL);
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//
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// Traverse all PCI Root Bridge I/O Protocol instances, and record the protocol
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// instances, together with their segment numbers and bus ranges.
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//
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for (Index = 0; Index < HandleCount; Index++) {
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Status = gBS->HandleProtocol (
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HandleBuffer[Index],
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&gEfiPciRootBridgeIoProtocolGuid,
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(VOID **) &PciRootBridgeIo
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);
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ASSERT_EFI_ERROR(Status);
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mPciRootBridgeData[Index].PciRootBridgeIo = PciRootBridgeIo;
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mPciRootBridgeData[Index].SegmentNumber = PciRootBridgeIo->SegmentNumber;
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Status = PciRootBridgeIo->Configuration (PciRootBridgeIo, (VOID **) &Descriptors);
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ASSERT_EFI_ERROR(Status);
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while (Descriptors->Desc != ACPI_END_TAG_DESCRIPTOR) {
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if (Descriptors->ResType == ACPI_ADDRESS_SPACE_TYPE_BUS) {
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mPciRootBridgeData[Index].MinBusNumber = Descriptors->AddrRangeMin;
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mPciRootBridgeData[Index].MaxBusNumber = Descriptors->AddrRangeMax;
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break;
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}
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Descriptors++;
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}
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ASSERT (Descriptors->Desc != ACPI_END_TAG_DESCRIPTOR);
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}
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FreePool(HandleBuffer);
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return EFI_SUCCESS;
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}
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/**
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The destructor function frees memory allocated by constructor.
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The destructor function frees memory for data of protocol instances allocated by constructor.
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It will ASSERT() if that related operation fails and it will always return EFI_SUCCESS.
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@param ImageHandle The firmware allocated handle for the EFI image.
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@param SystemTable A pointer to the EFI System Table.
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@retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
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**/
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EFI_STATUS
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EFIAPI
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PciSegmentLibDestructor (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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FreePool(mPciRootBridgeData);
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return EFI_SUCCESS;
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}
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/**
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According to address, search for the corresponding PCI Root Bridge I/O Protocol instance.
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This internal function extracts segment number and bus number data from address, and
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retrieves the corresponding PCI Root Bridge I/O Protocol instance.
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@param Address The address that encodes the Segment, PCI Bus, Device, Function and
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Register.
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@return The address for PCI Root Bridge I/O Protocol.
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**/
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EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *
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PciSegmentLibSearchForRootBridge (
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IN UINT64 Address
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)
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{
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UINTN Index;
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UINT64 SegmentNumber;
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UINT64 BusNumber;
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for (Index = 0; Index < mNumberOfPciRootBridges; Index++) {
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//
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// Matches segment number of address with the segment number of protocol instance.
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//
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SegmentNumber = BitFieldRead64 (Address, 32, 63);
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if (SegmentNumber == mPciRootBridgeData[Index].SegmentNumber) {
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//
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// Matches the bus number of address with bus number range of protocol instance.
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//
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BusNumber = BitFieldRead64 (Address, 20, 27);
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if (BusNumber >= mPciRootBridgeData[Index].MinBusNumber && BusNumber <= mPciRootBridgeData[Index].MaxBusNumber) {
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return mPciRootBridgeData[Index].PciRootBridgeIo;
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}
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}
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}
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return NULL;
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}
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/**
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Internal worker function to read a PCI configuration register.
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This function wraps EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.Pci.Read() service.
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It reads and returns the PCI configuration register specified by Address,
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the width of data is specified by Width.
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@param Address The address that encodes the PCI Bus, Device, Function and
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Register.
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@param Width Width of data to read
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@return The value read from the PCI configuration register.
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**/
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UINT32
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DxePciSegmentLibPciRootBridgeIoReadWorker (
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IN UINT64 Address,
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IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width
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)
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{
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UINT32 Data;
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EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;
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PciRootBridgeIo = PciSegmentLibSearchForRootBridge (Address);
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ASSERT (PciRootBridgeIo != NULL);
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PciRootBridgeIo->Pci.Read (
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PciRootBridgeIo,
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Width,
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PCI_TO_PCI_ROOT_BRIDGE_IO_ADDRESS (Address),
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1,
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&Data
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);
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return Data;
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}
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/**
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Internal worker function to writes a PCI configuration register.
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This function wraps EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.Pci.Write() service.
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It writes the PCI configuration register specified by Address with the
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value specified by Data. The width of data is specifed by Width.
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Data is returned.
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@param Address The address that encodes the PCI Bus, Device, Function and
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Register.
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@param Width Width of data to write
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@param Data The value to write.
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@return The value written to the PCI configuration register.
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**/
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UINT32
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DxePciSegmentLibPciRootBridgeIoWriteWorker (
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IN UINT64 Address,
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IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
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IN UINT32 Data
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)
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{
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EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;
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PciRootBridgeIo = PciSegmentLibSearchForRootBridge (Address);
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ASSERT (PciRootBridgeIo != NULL);
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PciRootBridgeIo->Pci.Write (
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PciRootBridgeIo,
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Width,
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PCI_TO_PCI_ROOT_BRIDGE_IO_ADDRESS (Address),
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1,
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&Data
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);
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return Data;
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}
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/**
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Register a PCI device so PCI configuration registers may be accessed after
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SetVirtualAddressMap().
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If any reserved bits in Address are set, then ASSERT().
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@param Address Address that encodes the PCI Bus, Device, Function and
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Register.
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@retval RETURN_SUCCESS The PCI device was registered for runtime access.
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@retval RETURN_UNSUPPORTED An attempt was made to call this function
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after ExitBootServices().
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@retval RETURN_UNSUPPORTED The resources required to access the PCI device
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at runtime could not be mapped.
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@retval RETURN_OUT_OF_RESOURCES There are not enough resources available to
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complete the registration.
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**/
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RETURN_STATUS
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EFIAPI
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PciSegmentRegisterForRuntimeAccess (
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IN UINTN Address
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)
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{
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ASSERT_INVALID_PCI_SEGMENT_ADDRESS (Address, 0);
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return RETURN_UNSUPPORTED;
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}
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/**
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Reads an 8-bit PCI configuration register.
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Reads and returns the 8-bit PCI configuration register specified by Address.
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This function must guarantee that all PCI read and write operations are serialized.
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If any reserved bits in Address are set, then ASSERT().
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@param Address Address that encodes the PCI Segment, Bus, Device, Function, and Register.
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@return The 8-bit PCI configuration register specified by Address.
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**/
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UINT8
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EFIAPI
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PciSegmentRead8 (
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IN UINT64 Address
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)
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{
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ASSERT_INVALID_PCI_SEGMENT_ADDRESS (Address, 0);
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return (UINT8) DxePciSegmentLibPciRootBridgeIoReadWorker (Address, EfiPciWidthUint8);
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}
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/**
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Writes an 8-bit PCI configuration register.
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Writes the 8-bit PCI configuration register specified by Address with the value specified by Value.
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Value is returned. This function must guarantee that all PCI read and write operations are serialized.
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If any reserved bits in Address are set, then ASSERT().
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@param Address Address that encodes the PCI Segment, Bus, Device, Function, and Register.
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@param Value The value to write.
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@return The value written to the PCI configuration register.
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**/
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UINT8
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EFIAPI
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PciSegmentWrite8 (
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IN UINT64 Address,
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IN UINT8 Value
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)
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{
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ASSERT_INVALID_PCI_SEGMENT_ADDRESS (Address, 0);
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return (UINT8) DxePciSegmentLibPciRootBridgeIoWriteWorker (Address, EfiPciWidthUint8, Value);
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}
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/**
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Performs a bitwise OR of an 8-bit PCI configuration register with an 8-bit value.
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Reads the 8-bit PCI configuration register specified by Address,
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performs a bitwise OR between the read result and the value specified by OrData,
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and writes the result to the 8-bit PCI configuration register specified by Address.
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The value written to the PCI configuration register is returned.
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This function must guarantee that all PCI read and write operations are serialized.
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If any reserved bits in Address are set, then ASSERT().
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@param Address Address that encodes the PCI Segment, Bus, Device, Function, and Register.
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@param OrData The value to OR with the PCI configuration register.
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@return The value written to the PCI configuration register.
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**/
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UINT8
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EFIAPI
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PciSegmentOr8 (
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IN UINT64 Address,
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IN UINT8 OrData
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)
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{
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return PciSegmentWrite8 (Address, (UINT8) (PciSegmentRead8 (Address) | OrData));
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}
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/**
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Performs a bitwise AND of an 8-bit PCI configuration register with an 8-bit value.
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Reads the 8-bit PCI configuration register specified by Address,
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performs a bitwise AND between the read result and the value specified by AndData,
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and writes the result to the 8-bit PCI configuration register specified by Address.
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The value written to the PCI configuration register is returned.
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This function must guarantee that all PCI read and write operations are serialized.
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If any reserved bits in Address are set, then ASSERT().
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@param Address Address that encodes the PCI Segment, Bus, Device, Function, and Register.
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@param AndData The value to AND with the PCI configuration register.
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@return The value written to the PCI configuration register.
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**/
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UINT8
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EFIAPI
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PciSegmentAnd8 (
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IN UINT64 Address,
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IN UINT8 AndData
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)
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{
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return PciSegmentWrite8 (Address, (UINT8) (PciSegmentRead8 (Address) & AndData));
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}
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/**
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Performs a bitwise AND of an 8-bit PCI configuration register with an 8-bit value,
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followed a bitwise OR with another 8-bit value.
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Reads the 8-bit PCI configuration register specified by Address,
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performs a bitwise AND between the read result and the value specified by AndData,
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performs a bitwise OR between the result of the AND operation and the value specified by OrData,
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and writes the result to the 8-bit PCI configuration register specified by Address.
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The value written to the PCI configuration register is returned.
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This function must guarantee that all PCI read and write operations are serialized.
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If any reserved bits in Address are set, then ASSERT().
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@param Address Address that encodes the PCI Segment, Bus, Device, Function, and Register.
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@param AndData The value to AND with the PCI configuration register.
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@param OrData The value to OR with the PCI configuration register.
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@return The value written to the PCI configuration register.
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**/
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UINT8
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EFIAPI
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PciSegmentAndThenOr8 (
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IN UINT64 Address,
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IN UINT8 AndData,
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IN UINT8 OrData
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)
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{
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return PciSegmentWrite8 (Address, (UINT8) ((PciSegmentRead8 (Address) & AndData) | OrData));
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}
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/**
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Reads a bit field of a PCI configuration register.
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Reads the bit field in an 8-bit PCI configuration register. The bit field is
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specified by the StartBit and the EndBit. The value of the bit field is
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returned.
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If any reserved bits in Address are set, then ASSERT().
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If StartBit is greater than 7, then ASSERT().
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If EndBit is greater than 7, then ASSERT().
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If EndBit is less than StartBit, then ASSERT().
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@param Address PCI configuration register to read.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..7.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..7.
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@return The value of the bit field read from the PCI configuration register.
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**/
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UINT8
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EFIAPI
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PciSegmentBitFieldRead8 (
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IN UINT64 Address,
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IN UINTN StartBit,
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IN UINTN EndBit
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)
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{
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return BitFieldRead8 (PciSegmentRead8 (Address), StartBit, EndBit);
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}
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/**
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Writes a bit field to a PCI configuration register.
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Writes Value to the bit field of the PCI configuration register. The bit
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field is specified by the StartBit and the EndBit. All other bits in the
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destination PCI configuration register are preserved. The new value of the
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8-bit register is returned.
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If any reserved bits in Address are set, then ASSERT().
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If StartBit is greater than 7, then ASSERT().
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If EndBit is greater than 7, then ASSERT().
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If EndBit is less than StartBit, then ASSERT().
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If Value is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
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@param Address PCI configuration register to write.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..7.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..7.
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@param Value New value of the bit field.
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@return The value written back to the PCI configuration register.
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**/
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UINT8
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EFIAPI
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PciSegmentBitFieldWrite8 (
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IN UINT64 Address,
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IN UINTN StartBit,
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IN UINTN EndBit,
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IN UINT8 Value
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)
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{
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return PciSegmentWrite8 (
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Address,
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BitFieldWrite8 (PciSegmentRead8 (Address), StartBit, EndBit, Value)
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);
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}
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|
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/**
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Reads a bit field in an 8-bit PCI configuration, performs a bitwise OR, and
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writes the result back to the bit field in the 8-bit port.
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|
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Reads the 8-bit PCI configuration register specified by Address, performs a
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bitwise OR between the read result and the value specified by
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OrData, and writes the result to the 8-bit PCI configuration register
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|
specified by Address. The value written to the PCI configuration register is
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returned. This function must guarantee that all PCI read and write operations
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are serialized. Extra left bits in OrData are stripped.
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|
|
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If any reserved bits in Address are set, then ASSERT().
|
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If StartBit is greater than 7, then ASSERT().
|
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If EndBit is greater than 7, then ASSERT().
|
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If EndBit is less than StartBit, then ASSERT().
|
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If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
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|
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@param Address PCI configuration register to write.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..7.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..7.
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@param OrData The value to OR with the PCI configuration register.
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@return The value written back to the PCI configuration register.
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|
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**/
|
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UINT8
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EFIAPI
|
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PciSegmentBitFieldOr8 (
|
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IN UINT64 Address,
|
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IN UINTN StartBit,
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IN UINTN EndBit,
|
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IN UINT8 OrData
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)
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{
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return PciSegmentWrite8 (
|
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Address,
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BitFieldOr8 (PciSegmentRead8 (Address), StartBit, EndBit, OrData)
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);
|
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}
|
|
|
|
/**
|
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Reads a bit field in an 8-bit PCI configuration register, performs a bitwise
|
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AND, and writes the result back to the bit field in the 8-bit register.
|
|
|
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Reads the 8-bit PCI configuration register specified by Address, performs a
|
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bitwise AND between the read result and the value specified by AndData, and
|
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writes the result to the 8-bit PCI configuration register specified by
|
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Address. The value written to the PCI configuration register is returned.
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This function must guarantee that all PCI read and write operations are
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serialized. Extra left bits in AndData are stripped.
|
|
|
|
If any reserved bits in Address are set, then ASSERT().
|
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If StartBit is greater than 7, then ASSERT().
|
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If EndBit is greater than 7, then ASSERT().
|
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If EndBit is less than StartBit, then ASSERT().
|
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If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
|
|
|
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@param Address PCI configuration register to write.
|
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@param StartBit The ordinal of the least significant bit in the bit field.
|
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Range 0..7.
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@param EndBit The ordinal of the most significant bit in the bit field.
|
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Range 0..7.
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@param AndData The value to AND with the PCI configuration register.
|
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|
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@return The value written back to the PCI configuration register.
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|
|
**/
|
|
UINT8
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EFIAPI
|
|
PciSegmentBitFieldAnd8 (
|
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IN UINT64 Address,
|
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IN UINTN StartBit,
|
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IN UINTN EndBit,
|
|
IN UINT8 AndData
|
|
)
|
|
{
|
|
return PciSegmentWrite8 (
|
|
Address,
|
|
BitFieldAnd8 (PciSegmentRead8 (Address), StartBit, EndBit, AndData)
|
|
);
|
|
}
|
|
|
|
/**
|
|
Reads a bit field in an 8-bit port, performs a bitwise AND followed by a
|
|
bitwise OR, and writes the result back to the bit field in the 8-bit port.
|
|
|
|
Reads the 8-bit PCI configuration register specified by Address, performs a
|
|
bitwise AND followed by a bitwise OR between the read result and
|
|
the value specified by AndData, and writes the result to the 8-bit PCI
|
|
configuration register specified by Address. The value written to the PCI
|
|
configuration register is returned. This function must guarantee that all PCI
|
|
read and write operations are serialized. Extra left bits in both AndData and
|
|
OrData are stripped.
|
|
|
|
If any reserved bits in Address are set, then ASSERT().
|
|
If StartBit is greater than 7, then ASSERT().
|
|
If EndBit is greater than 7, then ASSERT().
|
|
If EndBit is less than StartBit, then ASSERT().
|
|
If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
|
|
If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
|
|
|
|
@param Address PCI configuration register to write.
|
|
@param StartBit The ordinal of the least significant bit in the bit field.
|
|
Range 0..7.
|
|
@param EndBit The ordinal of the most significant bit in the bit field.
|
|
Range 0..7.
|
|
@param AndData The value to AND with the PCI configuration register.
|
|
@param OrData The value to OR with the result of the AND operation.
|
|
|
|
@return The value written back to the PCI configuration register.
|
|
|
|
**/
|
|
UINT8
|
|
EFIAPI
|
|
PciSegmentBitFieldAndThenOr8 (
|
|
IN UINT64 Address,
|
|
IN UINTN StartBit,
|
|
IN UINTN EndBit,
|
|
IN UINT8 AndData,
|
|
IN UINT8 OrData
|
|
)
|
|
{
|
|
return PciSegmentWrite8 (
|
|
Address,
|
|
BitFieldAndThenOr8 (PciSegmentRead8 (Address), StartBit, EndBit, AndData, OrData)
|
|
);
|
|
}
|
|
|
|
/**
|
|
Reads a 16-bit PCI configuration register.
|
|
|
|
Reads and returns the 16-bit PCI configuration register specified by Address.
|
|
This function must guarantee that all PCI read and write operations are serialized.
|
|
|
|
If any reserved bits in Address are set, then ASSERT().
|
|
If Address is not aligned on a 16-bit boundary, then ASSERT().
|
|
|
|
@param Address Address that encodes the PCI Segment, Bus, Device, Function, and Register.
|
|
|
|
@return The 16-bit PCI configuration register specified by Address.
|
|
|
|
**/
|
|
UINT16
|
|
EFIAPI
|
|
PciSegmentRead16 (
|
|
IN UINT64 Address
|
|
)
|
|
{
|
|
ASSERT_INVALID_PCI_SEGMENT_ADDRESS (Address, 1);
|
|
|
|
return (UINT16) DxePciSegmentLibPciRootBridgeIoReadWorker (Address, EfiPciWidthUint16);
|
|
}
|
|
|
|
/**
|
|
Writes a 16-bit PCI configuration register.
|
|
|
|
Writes the 16-bit PCI configuration register specified by Address with the value specified by Value.
|
|
Value is returned. This function must guarantee that all PCI read and write operations are serialized.
|
|
|
|
If any reserved bits in Address are set, then ASSERT().
|
|
If Address is not aligned on a 16-bit boundary, then ASSERT().
|
|
|
|
@param Address Address that encodes the PCI Segment, Bus, Device, Function, and Register.
|
|
@param Value The value to write.
|
|
|
|
@return The parameter of Value.
|
|
|
|
**/
|
|
UINT16
|
|
EFIAPI
|
|
PciSegmentWrite16 (
|
|
IN UINT64 Address,
|
|
IN UINT16 Value
|
|
)
|
|
{
|
|
ASSERT_INVALID_PCI_SEGMENT_ADDRESS (Address, 1);
|
|
|
|
return (UINT16) DxePciSegmentLibPciRootBridgeIoWriteWorker (Address, EfiPciWidthUint16, Value);
|
|
}
|
|
|
|
/**
|
|
Performs a bitwise OR of a 16-bit PCI configuration register with
|
|
a 16-bit value.
|
|
|
|
Reads the 16-bit PCI configuration register specified by Address, performs a
|
|
bitwise OR between the read result and the value specified by OrData, and
|
|
writes the result to the 16-bit PCI configuration register specified by Address.
|
|
The value written to the PCI configuration register is returned. This function
|
|
must guarantee that all PCI read and write operations are serialized.
|
|
|
|
If any reserved bits in Address are set, then ASSERT().
|
|
If Address is not aligned on a 16-bit boundary, then ASSERT().
|
|
|
|
@param Address Address that encodes the PCI Segment, Bus, Device, Function and
|
|
Register.
|
|
@param OrData The value to OR with the PCI configuration register.
|
|
|
|
@return The value written back to the PCI configuration register.
|
|
|
|
**/
|
|
UINT16
|
|
EFIAPI
|
|
PciSegmentOr16 (
|
|
IN UINT64 Address,
|
|
IN UINT16 OrData
|
|
)
|
|
{
|
|
return PciSegmentWrite16 (Address, (UINT16) (PciSegmentRead16 (Address) | OrData));
|
|
}
|
|
|
|
/**
|
|
Performs a bitwise AND of a 16-bit PCI configuration register with a 16-bit value.
|
|
|
|
Reads the 16-bit PCI configuration register specified by Address,
|
|
performs a bitwise AND between the read result and the value specified by AndData,
|
|
and writes the result to the 16-bit PCI configuration register specified by Address.
|
|
The value written to the PCI configuration register is returned.
|
|
This function must guarantee that all PCI read and write operations are serialized.
|
|
|
|
If any reserved bits in Address are set, then ASSERT().
|
|
If Address is not aligned on a 16-bit boundary, then ASSERT().
|
|
|
|
@param Address Address that encodes the PCI Segment, Bus, Device, Function, and Register.
|
|
@param AndData The value to AND with the PCI configuration register.
|
|
|
|
@return The value written to the PCI configuration register.
|
|
|
|
**/
|
|
UINT16
|
|
EFIAPI
|
|
PciSegmentAnd16 (
|
|
IN UINT64 Address,
|
|
IN UINT16 AndData
|
|
)
|
|
{
|
|
return PciSegmentWrite16 (Address, (UINT16) (PciSegmentRead16 (Address) & AndData));
|
|
}
|
|
|
|
/**
|
|
Performs a bitwise AND of a 16-bit PCI configuration register with a 16-bit value,
|
|
followed a bitwise OR with another 16-bit value.
|
|
|
|
Reads the 16-bit PCI configuration register specified by Address,
|
|
performs a bitwise AND between the read result and the value specified by AndData,
|
|
performs a bitwise OR between the result of the AND operation and the value specified by OrData,
|
|
and writes the result to the 16-bit PCI configuration register specified by Address.
|
|
The value written to the PCI configuration register is returned.
|
|
This function must guarantee that all PCI read and write operations are serialized.
|
|
|
|
If any reserved bits in Address are set, then ASSERT().
|
|
If Address is not aligned on a 16-bit boundary, then ASSERT().
|
|
|
|
@param Address Address that encodes the PCI Segment, Bus, Device, Function, and Register.
|
|
@param AndData The value to AND with the PCI configuration register.
|
|
@param OrData The value to OR with the PCI configuration register.
|
|
|
|
@return The value written to the PCI configuration register.
|
|
|
|
**/
|
|
UINT16
|
|
EFIAPI
|
|
PciSegmentAndThenOr16 (
|
|
IN UINT64 Address,
|
|
IN UINT16 AndData,
|
|
IN UINT16 OrData
|
|
)
|
|
{
|
|
return PciSegmentWrite16 (Address, (UINT16) ((PciSegmentRead16 (Address) & AndData) | OrData));
|
|
}
|
|
|
|
/**
|
|
Reads a bit field of a PCI configuration register.
|
|
|
|
Reads the bit field in a 16-bit PCI configuration register. The bit field is
|
|
specified by the StartBit and the EndBit. The value of the bit field is
|
|
returned.
|
|
|
|
If any reserved bits in Address are set, then ASSERT().
|
|
If Address is not aligned on a 16-bit boundary, then ASSERT().
|
|
If StartBit is greater than 15, then ASSERT().
|
|
If EndBit is greater than 15, then ASSERT().
|
|
If EndBit is less than StartBit, then ASSERT().
|
|
|
|
@param Address PCI configuration register to read.
|
|
@param StartBit The ordinal of the least significant bit in the bit field.
|
|
Range 0..15.
|
|
@param EndBit The ordinal of the most significant bit in the bit field.
|
|
Range 0..15.
|
|
|
|
@return The value of the bit field read from the PCI configuration register.
|
|
|
|
**/
|
|
UINT16
|
|
EFIAPI
|
|
PciSegmentBitFieldRead16 (
|
|
IN UINT64 Address,
|
|
IN UINTN StartBit,
|
|
IN UINTN EndBit
|
|
)
|
|
{
|
|
return BitFieldRead16 (PciSegmentRead16 (Address), StartBit, EndBit);
|
|
}
|
|
|
|
/**
|
|
Writes a bit field to a PCI configuration register.
|
|
|
|
Writes Value to the bit field of the PCI configuration register. The bit
|
|
field is specified by the StartBit and the EndBit. All other bits in the
|
|
destination PCI configuration register are preserved. The new value of the
|
|
16-bit register is returned.
|
|
|
|
If any reserved bits in Address are set, then ASSERT().
|
|
If Address is not aligned on a 16-bit boundary, then ASSERT().
|
|
If StartBit is greater than 15, then ASSERT().
|
|
If EndBit is greater than 15, then ASSERT().
|
|
If EndBit is less than StartBit, then ASSERT().
|
|
If Value is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
|
|
|
|
@param Address PCI configuration register to write.
|
|
@param StartBit The ordinal of the least significant bit in the bit field.
|
|
Range 0..15.
|
|
@param EndBit The ordinal of the most significant bit in the bit field.
|
|
Range 0..15.
|
|
@param Value New value of the bit field.
|
|
|
|
@return The value written back to the PCI configuration register.
|
|
|
|
**/
|
|
UINT16
|
|
EFIAPI
|
|
PciSegmentBitFieldWrite16 (
|
|
IN UINT64 Address,
|
|
IN UINTN StartBit,
|
|
IN UINTN EndBit,
|
|
IN UINT16 Value
|
|
)
|
|
{
|
|
return PciSegmentWrite16 (
|
|
Address,
|
|
BitFieldWrite16 (PciSegmentRead16 (Address), StartBit, EndBit, Value)
|
|
);
|
|
}
|
|
|
|
/**
|
|
Reads a bit field in a 16-bit PCI configuration, performs a bitwise OR, writes
|
|
the result back to the bit field in the 16-bit port.
|
|
|
|
Reads the 16-bit PCI configuration register specified by Address, performs a
|
|
bitwise OR between the read result and the value specified by
|
|
OrData, and writes the result to the 16-bit PCI configuration register
|
|
specified by Address. The value written to the PCI configuration register is
|
|
returned. This function must guarantee that all PCI read and write operations
|
|
are serialized. Extra left bits in OrData are stripped.
|
|
|
|
If any reserved bits in Address are set, then ASSERT().
|
|
If Address is not aligned on a 16-bit boundary, then ASSERT().
|
|
If StartBit is greater than 15, then ASSERT().
|
|
If EndBit is greater than 15, then ASSERT().
|
|
If EndBit is less than StartBit, then ASSERT().
|
|
If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
|
|
|
|
@param Address PCI configuration register to write.
|
|
@param StartBit The ordinal of the least significant bit in the bit field.
|
|
Range 0..15.
|
|
@param EndBit The ordinal of the most significant bit in the bit field.
|
|
Range 0..15.
|
|
@param OrData The value to OR with the PCI configuration register.
|
|
|
|
@return The value written back to the PCI configuration register.
|
|
|
|
**/
|
|
UINT16
|
|
EFIAPI
|
|
PciSegmentBitFieldOr16 (
|
|
IN UINT64 Address,
|
|
IN UINTN StartBit,
|
|
IN UINTN EndBit,
|
|
IN UINT16 OrData
|
|
)
|
|
{
|
|
return PciSegmentWrite16 (
|
|
Address,
|
|
BitFieldOr16 (PciSegmentRead16 (Address), StartBit, EndBit, OrData)
|
|
);
|
|
}
|
|
|
|
/**
|
|
Reads a bit field in a 16-bit PCI configuration register, performs a bitwise
|
|
AND, writes the result back to the bit field in the 16-bit register.
|
|
|
|
Reads the 16-bit PCI configuration register specified by Address, performs a
|
|
bitwise AND between the read result and the value specified by AndData, and
|
|
writes the result to the 16-bit PCI configuration register specified by
|
|
Address. The value written to the PCI configuration register is returned.
|
|
This function must guarantee that all PCI read and write operations are
|
|
serialized. Extra left bits in AndData are stripped.
|
|
|
|
If any reserved bits in Address are set, then ASSERT().
|
|
If Address is not aligned on a 16-bit boundary, then ASSERT().
|
|
If StartBit is greater than 15, then ASSERT().
|
|
If EndBit is greater than 15, then ASSERT().
|
|
If EndBit is less than StartBit, then ASSERT().
|
|
If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
|
|
|
|
@param Address Address that encodes the PCI Segment, Bus, Device, Function, and Register.
|
|
@param StartBit The ordinal of the least significant bit in the bit field.
|
|
Range 0..15.
|
|
@param EndBit The ordinal of the most significant bit in the bit field.
|
|
Range 0..15.
|
|
@param AndData The value to AND with the PCI configuration register.
|
|
|
|
@return The value written back to the PCI configuration register.
|
|
|
|
**/
|
|
UINT16
|
|
EFIAPI
|
|
PciSegmentBitFieldAnd16 (
|
|
IN UINT64 Address,
|
|
IN UINTN StartBit,
|
|
IN UINTN EndBit,
|
|
IN UINT16 AndData
|
|
)
|
|
{
|
|
return PciSegmentWrite16 (
|
|
Address,
|
|
BitFieldAnd16 (PciSegmentRead16 (Address), StartBit, EndBit, AndData)
|
|
);
|
|
}
|
|
|
|
/**
|
|
Reads a bit field in a 16-bit port, performs a bitwise AND followed by a
|
|
bitwise OR, and writes the result back to the bit field in the
|
|
16-bit port.
|
|
|
|
Reads the 16-bit PCI configuration register specified by Address, performs a
|
|
bitwise AND followed by a bitwise OR between the read result and
|
|
the value specified by AndData, and writes the result to the 16-bit PCI
|
|
configuration register specified by Address. The value written to the PCI
|
|
configuration register is returned. This function must guarantee that all PCI
|
|
read and write operations are serialized. Extra left bits in both AndData and
|
|
OrData are stripped.
|
|
|
|
If any reserved bits in Address are set, then ASSERT().
|
|
If StartBit is greater than 15, then ASSERT().
|
|
If EndBit is greater than 15, then ASSERT().
|
|
If EndBit is less than StartBit, then ASSERT().
|
|
If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
|
|
If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
|
|
|
|
@param Address PCI configuration register to write.
|
|
@param StartBit The ordinal of the least significant bit in the bit field.
|
|
Range 0..15.
|
|
@param EndBit The ordinal of the most significant bit in the bit field.
|
|
Range 0..15.
|
|
@param AndData The value to AND with the PCI configuration register.
|
|
@param OrData The value to OR with the result of the AND operation.
|
|
|
|
@return The value written back to the PCI configuration register.
|
|
|
|
**/
|
|
UINT16
|
|
EFIAPI
|
|
PciSegmentBitFieldAndThenOr16 (
|
|
IN UINT64 Address,
|
|
IN UINTN StartBit,
|
|
IN UINTN EndBit,
|
|
IN UINT16 AndData,
|
|
IN UINT16 OrData
|
|
)
|
|
{
|
|
return PciSegmentWrite16 (
|
|
Address,
|
|
BitFieldAndThenOr16 (PciSegmentRead16 (Address), StartBit, EndBit, AndData, OrData)
|
|
);
|
|
}
|
|
|
|
/**
|
|
Reads a 32-bit PCI configuration register.
|
|
|
|
Reads and returns the 32-bit PCI configuration register specified by Address.
|
|
This function must guarantee that all PCI read and write operations are serialized.
|
|
|
|
If any reserved bits in Address are set, then ASSERT().
|
|
If Address is not aligned on a 32-bit boundary, then ASSERT().
|
|
|
|
@param Address Address that encodes the PCI Segment, Bus, Device, Function, and Register.
|
|
|
|
@return The 32-bit PCI configuration register specified by Address.
|
|
|
|
**/
|
|
UINT32
|
|
EFIAPI
|
|
PciSegmentRead32 (
|
|
IN UINT64 Address
|
|
)
|
|
{
|
|
ASSERT_INVALID_PCI_SEGMENT_ADDRESS (Address, 3);
|
|
|
|
return DxePciSegmentLibPciRootBridgeIoReadWorker (Address, EfiPciWidthUint32);
|
|
}
|
|
|
|
/**
|
|
Writes a 32-bit PCI configuration register.
|
|
|
|
Writes the 32-bit PCI configuration register specified by Address with the value specified by Value.
|
|
Value is returned. This function must guarantee that all PCI read and write operations are serialized.
|
|
|
|
If any reserved bits in Address are set, then ASSERT().
|
|
If Address is not aligned on a 32-bit boundary, then ASSERT().
|
|
|
|
@param Address Address that encodes the PCI Segment, Bus, Device, Function, and Register.
|
|
@param Value The value to write.
|
|
|
|
@return The parameter of Value.
|
|
|
|
**/
|
|
UINT32
|
|
EFIAPI
|
|
PciSegmentWrite32 (
|
|
IN UINT64 Address,
|
|
IN UINT32 Value
|
|
)
|
|
{
|
|
ASSERT_INVALID_PCI_SEGMENT_ADDRESS (Address, 3);
|
|
|
|
return DxePciSegmentLibPciRootBridgeIoWriteWorker (Address, EfiPciWidthUint32, Value);
|
|
}
|
|
|
|
/**
|
|
Performs a bitwise OR of a 32-bit PCI configuration register with a 32-bit value.
|
|
|
|
Reads the 32-bit PCI configuration register specified by Address,
|
|
performs a bitwise OR between the read result and the value specified by OrData,
|
|
and writes the result to the 32-bit PCI configuration register specified by Address.
|
|
The value written to the PCI configuration register is returned.
|
|
This function must guarantee that all PCI read and write operations are serialized.
|
|
|
|
If any reserved bits in Address are set, then ASSERT().
|
|
If Address is not aligned on a 32-bit boundary, then ASSERT().
|
|
|
|
@param Address Address that encodes the PCI Segment, Bus, Device, Function, and Register.
|
|
@param OrData The value to OR with the PCI configuration register.
|
|
|
|
@return The value written to the PCI configuration register.
|
|
|
|
**/
|
|
UINT32
|
|
EFIAPI
|
|
PciSegmentOr32 (
|
|
IN UINT64 Address,
|
|
IN UINT32 OrData
|
|
)
|
|
{
|
|
return PciSegmentWrite32 (Address, PciSegmentRead32 (Address) | OrData);
|
|
}
|
|
|
|
/**
|
|
Performs a bitwise AND of a 32-bit PCI configuration register with a 32-bit value.
|
|
|
|
Reads the 32-bit PCI configuration register specified by Address,
|
|
performs a bitwise AND between the read result and the value specified by AndData,
|
|
and writes the result to the 32-bit PCI configuration register specified by Address.
|
|
The value written to the PCI configuration register is returned.
|
|
This function must guarantee that all PCI read and write operations are serialized.
|
|
|
|
If any reserved bits in Address are set, then ASSERT().
|
|
If Address is not aligned on a 32-bit boundary, then ASSERT().
|
|
|
|
@param Address Address that encodes the PCI Segment, Bus, Device, Function, and Register.
|
|
@param AndData The value to AND with the PCI configuration register.
|
|
|
|
@return The value written to the PCI configuration register.
|
|
|
|
**/
|
|
UINT32
|
|
EFIAPI
|
|
PciSegmentAnd32 (
|
|
IN UINT64 Address,
|
|
IN UINT32 AndData
|
|
)
|
|
{
|
|
return PciSegmentWrite32 (Address, PciSegmentRead32 (Address) & AndData);
|
|
}
|
|
|
|
/**
|
|
Performs a bitwise AND of a 32-bit PCI configuration register with a 32-bit value,
|
|
followed a bitwise OR with another 32-bit value.
|
|
|
|
Reads the 32-bit PCI configuration register specified by Address,
|
|
performs a bitwise AND between the read result and the value specified by AndData,
|
|
performs a bitwise OR between the result of the AND operation and the value specified by OrData,
|
|
and writes the result to the 32-bit PCI configuration register specified by Address.
|
|
The value written to the PCI configuration register is returned.
|
|
This function must guarantee that all PCI read and write operations are serialized.
|
|
|
|
If any reserved bits in Address are set, then ASSERT().
|
|
If Address is not aligned on a 32-bit boundary, then ASSERT().
|
|
|
|
@param Address Address that encodes the PCI Segment, Bus, Device, Function, and Register.
|
|
@param AndData The value to AND with the PCI configuration register.
|
|
@param OrData The value to OR with the PCI configuration register.
|
|
|
|
@return The value written to the PCI configuration register.
|
|
|
|
**/
|
|
UINT32
|
|
EFIAPI
|
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PciSegmentAndThenOr32 (
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IN UINT64 Address,
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IN UINT32 AndData,
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IN UINT32 OrData
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)
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{
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return PciSegmentWrite32 (Address, (PciSegmentRead32 (Address) & AndData) | OrData);
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}
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|
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/**
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Reads a bit field of a PCI configuration register.
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|
Reads the bit field in a 32-bit PCI configuration register. The bit field is
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|
specified by the StartBit and the EndBit. The value of the bit field is
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returned.
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|
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|
If any reserved bits in Address are set, then ASSERT().
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If Address is not aligned on a 32-bit boundary, then ASSERT().
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If StartBit is greater than 31, then ASSERT().
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If EndBit is greater than 31, then ASSERT().
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If EndBit is less than StartBit, then ASSERT().
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|
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@param Address PCI configuration register to read.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..31.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..31.
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@return The value of the bit field read from the PCI configuration register.
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|
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|
**/
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UINT32
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EFIAPI
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PciSegmentBitFieldRead32 (
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IN UINT64 Address,
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IN UINTN StartBit,
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IN UINTN EndBit
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|
)
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|
{
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return BitFieldRead32 (PciSegmentRead32 (Address), StartBit, EndBit);
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}
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/**
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|
Writes a bit field to a PCI configuration register.
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|
Writes Value to the bit field of the PCI configuration register. The bit
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field is specified by the StartBit and the EndBit. All other bits in the
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destination PCI configuration register are preserved. The new value of the
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32-bit register is returned.
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|
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|
If any reserved bits in Address are set, then ASSERT().
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If Address is not aligned on a 32-bit boundary, then ASSERT().
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|
If StartBit is greater than 31, then ASSERT().
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|
If EndBit is greater than 31, then ASSERT().
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|
If EndBit is less than StartBit, then ASSERT().
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|
If Value is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
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|
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|
@param Address PCI configuration register to write.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..31.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..31.
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@param Value New value of the bit field.
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|
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|
@return The value written back to the PCI configuration register.
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|
**/
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UINT32
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EFIAPI
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|
PciSegmentBitFieldWrite32 (
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IN UINT64 Address,
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IN UINTN StartBit,
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IN UINTN EndBit,
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IN UINT32 Value
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|
)
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|
{
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return PciSegmentWrite32 (
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Address,
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BitFieldWrite32 (PciSegmentRead32 (Address), StartBit, EndBit, Value)
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);
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}
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/**
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Reads a bit field in a 32-bit PCI configuration, performs a bitwise OR, and
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writes the result back to the bit field in the 32-bit port.
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|
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Reads the 32-bit PCI configuration register specified by Address, performs a
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bitwise OR between the read result and the value specified by
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OrData, and writes the result to the 32-bit PCI configuration register
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|
specified by Address. The value written to the PCI configuration register is
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returned. This function must guarantee that all PCI read and write operations
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are serialized. Extra left bits in OrData are stripped.
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|
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If any reserved bits in Address are set, then ASSERT().
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If StartBit is greater than 31, then ASSERT().
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If EndBit is greater than 31, then ASSERT().
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If EndBit is less than StartBit, then ASSERT().
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If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
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|
@param Address PCI configuration register to write.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..31.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..31.
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@param OrData The value to OR with the PCI configuration register.
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@return The value written back to the PCI configuration register.
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|
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|
**/
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UINT32
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EFIAPI
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PciSegmentBitFieldOr32 (
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IN UINT64 Address,
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IN UINTN StartBit,
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IN UINTN EndBit,
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IN UINT32 OrData
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|
)
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{
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return PciSegmentWrite32 (
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Address,
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BitFieldOr32 (PciSegmentRead32 (Address), StartBit, EndBit, OrData)
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);
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}
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/**
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Reads a bit field in a 32-bit PCI configuration register, performs a bitwise
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AND, and writes the result back to the bit field in the 32-bit register.
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|
|
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Reads the 32-bit PCI configuration register specified by Address, performs a bitwise
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AND between the read result and the value specified by AndData, and writes the result
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to the 32-bit PCI configuration register specified by Address. The value written to
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the PCI configuration register is returned. This function must guarantee that all PCI
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read and write operations are serialized. Extra left bits in AndData are stripped.
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If any reserved bits in Address are set, then ASSERT().
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If Address is not aligned on a 32-bit boundary, then ASSERT().
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|
If StartBit is greater than 31, then ASSERT().
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|
If EndBit is greater than 31, then ASSERT().
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|
If EndBit is less than StartBit, then ASSERT().
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If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
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|
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|
@param Address Address that encodes the PCI Segment, Bus, Device, Function, and Register.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..31.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..31.
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@param AndData The value to AND with the PCI configuration register.
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|
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|
@return The value written back to the PCI configuration register.
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|
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|
**/
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|
UINT32
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|
EFIAPI
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|
PciSegmentBitFieldAnd32 (
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IN UINT64 Address,
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IN UINTN StartBit,
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IN UINTN EndBit,
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|
IN UINT32 AndData
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|
)
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|
{
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return PciSegmentWrite32 (
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Address,
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BitFieldAnd32 (PciSegmentRead32 (Address), StartBit, EndBit, AndData)
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);
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}
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|
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/**
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Reads a bit field in a 32-bit port, performs a bitwise AND followed by a
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bitwise OR, and writes the result back to the bit field in the
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|
32-bit port.
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|
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Reads the 32-bit PCI configuration register specified by Address, performs a
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bitwise AND followed by a bitwise OR between the read result and
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the value specified by AndData, and writes the result to the 32-bit PCI
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|
configuration register specified by Address. The value written to the PCI
|
|
configuration register is returned. This function must guarantee that all PCI
|
|
read and write operations are serialized. Extra left bits in both AndData and
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OrData are stripped.
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|
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If any reserved bits in Address are set, then ASSERT().
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If StartBit is greater than 31, then ASSERT().
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If EndBit is greater than 31, then ASSERT().
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If EndBit is less than StartBit, then ASSERT().
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If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
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If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
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|
@param Address PCI configuration register to write.
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|
@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..31.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..31.
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@param AndData The value to AND with the PCI configuration register.
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@param OrData The value to OR with the result of the AND operation.
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|
@return The value written back to the PCI configuration register.
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|
**/
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UINT32
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EFIAPI
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|
PciSegmentBitFieldAndThenOr32 (
|
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IN UINT64 Address,
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IN UINTN StartBit,
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IN UINTN EndBit,
|
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IN UINT32 AndData,
|
|
IN UINT32 OrData
|
|
)
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|
{
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return PciSegmentWrite32 (
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Address,
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BitFieldAndThenOr32 (PciSegmentRead32 (Address), StartBit, EndBit, AndData, OrData)
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);
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}
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|
/**
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|
Reads a range of PCI configuration registers into a caller supplied buffer.
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|
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|
Reads the range of PCI configuration registers specified by StartAddress and
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Size into the buffer specified by Buffer. This function only allows the PCI
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|
configuration registers from a single PCI function to be read. Size is
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returned. When possible 32-bit PCI configuration read cycles are used to read
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|
from StartAdress to StartAddress + Size. Due to alignment restrictions, 8-bit
|
|
and 16-bit PCI configuration read cycles may be used at the beginning and the
|
|
end of the range.
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|
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|
If any reserved bits in StartAddress are set, then ASSERT().
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If ((StartAddress & 0xFFF) + Size) > 0x1000, then ASSERT().
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|
If Size > 0 and Buffer is NULL, then ASSERT().
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|
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|
@param StartAddress Starting address that encodes the PCI Segment, Bus, Device,
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|
Function and Register.
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|
@param Size Size in bytes of the transfer.
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|
@param Buffer Pointer to a buffer receiving the data read.
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|
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|
@return Size
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|
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|
**/
|
|
UINTN
|
|
EFIAPI
|
|
PciSegmentReadBuffer (
|
|
IN UINT64 StartAddress,
|
|
IN UINTN Size,
|
|
OUT VOID *Buffer
|
|
)
|
|
{
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|
UINTN ReturnValue;
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|
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|
ASSERT_INVALID_PCI_SEGMENT_ADDRESS (StartAddress, 0);
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ASSERT (((StartAddress & 0xFFF) + Size) <= 0x1000);
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if (Size == 0) {
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return Size;
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}
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ASSERT (Buffer != NULL);
|
|
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|
//
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|
// Save Size for return
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|
//
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|
ReturnValue = Size;
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|
if ((StartAddress & BIT0) != 0) {
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//
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|
// Read a byte if StartAddress is byte aligned
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|
//
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|
*(volatile UINT8 *)Buffer = PciSegmentRead8 (StartAddress);
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|
StartAddress += sizeof (UINT8);
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|
Size -= sizeof (UINT8);
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Buffer = (UINT8*)Buffer + 1;
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}
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if (Size >= sizeof (UINT16) && (StartAddress & BIT1) != 0) {
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//
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|
// Read a word if StartAddress is word aligned
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//
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|
WriteUnaligned16 (Buffer, PciSegmentRead16 (StartAddress));
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|
StartAddress += sizeof (UINT16);
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|
Size -= sizeof (UINT16);
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Buffer = (UINT16*)Buffer + 1;
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|
}
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|
|
|
while (Size >= sizeof (UINT32)) {
|
|
//
|
|
// Read as many double words as possible
|
|
//
|
|
WriteUnaligned32 (Buffer, PciSegmentRead32 (StartAddress));
|
|
StartAddress += sizeof (UINT32);
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|
Size -= sizeof (UINT32);
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|
Buffer = (UINT32*)Buffer + 1;
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|
}
|
|
|
|
if (Size >= sizeof (UINT16)) {
|
|
//
|
|
// Read the last remaining word if exist
|
|
//
|
|
WriteUnaligned16 (Buffer, PciSegmentRead16 (StartAddress));
|
|
StartAddress += sizeof (UINT16);
|
|
Size -= sizeof (UINT16);
|
|
Buffer = (UINT16*)Buffer + 1;
|
|
}
|
|
|
|
if (Size >= sizeof (UINT8)) {
|
|
//
|
|
// Read the last remaining byte if exist
|
|
//
|
|
*(volatile UINT8 *)Buffer = PciSegmentRead8 (StartAddress);
|
|
}
|
|
|
|
return ReturnValue;
|
|
}
|
|
|
|
/**
|
|
Copies the data in a caller supplied buffer to a specified range of PCI
|
|
configuration space.
|
|
|
|
Writes the range of PCI configuration registers specified by StartAddress and
|
|
Size from the buffer specified by Buffer. This function only allows the PCI
|
|
configuration registers from a single PCI function to be written. Size is
|
|
returned. When possible 32-bit PCI configuration write cycles are used to
|
|
write from StartAdress to StartAddress + Size. Due to alignment restrictions,
|
|
8-bit and 16-bit PCI configuration write cycles may be used at the beginning
|
|
and the end of the range.
|
|
|
|
If any reserved bits in StartAddress are set, then ASSERT().
|
|
If ((StartAddress & 0xFFF) + Size) > 0x1000, then ASSERT().
|
|
If Size > 0 and Buffer is NULL, then ASSERT().
|
|
|
|
@param StartAddress Starting address that encodes the PCI Segment, Bus, Device,
|
|
Function and Register.
|
|
@param Size Size in bytes of the transfer.
|
|
@param Buffer Pointer to a buffer containing the data to write.
|
|
|
|
@return The parameter of Size.
|
|
|
|
**/
|
|
UINTN
|
|
EFIAPI
|
|
PciSegmentWriteBuffer (
|
|
IN UINT64 StartAddress,
|
|
IN UINTN Size,
|
|
IN VOID *Buffer
|
|
)
|
|
{
|
|
UINTN ReturnValue;
|
|
|
|
ASSERT_INVALID_PCI_SEGMENT_ADDRESS (StartAddress, 0);
|
|
ASSERT (((StartAddress & 0xFFF) + Size) <= 0x1000);
|
|
|
|
if (Size == 0) {
|
|
return 0;
|
|
}
|
|
|
|
ASSERT (Buffer != NULL);
|
|
|
|
//
|
|
// Save Size for return
|
|
//
|
|
ReturnValue = Size;
|
|
|
|
if ((StartAddress & BIT0) != 0) {
|
|
//
|
|
// Write a byte if StartAddress is byte aligned
|
|
//
|
|
PciSegmentWrite8 (StartAddress, *(UINT8*)Buffer);
|
|
StartAddress += sizeof (UINT8);
|
|
Size -= sizeof (UINT8);
|
|
Buffer = (UINT8*)Buffer + 1;
|
|
}
|
|
|
|
if (Size >= sizeof (UINT16) && (StartAddress & BIT1) != 0) {
|
|
//
|
|
// Write a word if StartAddress is word aligned
|
|
//
|
|
PciSegmentWrite16 (StartAddress, ReadUnaligned16 (Buffer));
|
|
StartAddress += sizeof (UINT16);
|
|
Size -= sizeof (UINT16);
|
|
Buffer = (UINT16*)Buffer + 1;
|
|
}
|
|
|
|
while (Size >= sizeof (UINT32)) {
|
|
//
|
|
// Write as many double words as possible
|
|
//
|
|
PciSegmentWrite32 (StartAddress, ReadUnaligned32 (Buffer));
|
|
StartAddress += sizeof (UINT32);
|
|
Size -= sizeof (UINT32);
|
|
Buffer = (UINT32*)Buffer + 1;
|
|
}
|
|
|
|
if (Size >= sizeof (UINT16)) {
|
|
//
|
|
// Write the last remaining word if exist
|
|
//
|
|
PciSegmentWrite16 (StartAddress, ReadUnaligned16 (Buffer));
|
|
StartAddress += sizeof (UINT16);
|
|
Size -= sizeof (UINT16);
|
|
Buffer = (UINT16*)Buffer + 1;
|
|
}
|
|
|
|
if (Size >= sizeof (UINT8)) {
|
|
//
|
|
// Write the last remaining byte if exist
|
|
//
|
|
PciSegmentWrite8 (StartAddress, *(UINT8*)Buffer);
|
|
}
|
|
|
|
return ReturnValue;
|
|
}
|