/*++
Copyright (c) 2005 - 2012, 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.
Module Name:
PcatPciRootBridgeIo.c
Abstract:
EFI PC AT PCI Root Bridge Io Protocol
Revision History
--*/
#include "PcatPciRootBridge.h"
//
// Protocol Member Function Prototypes
//
EFI_STATUS
EFIAPI
PcatRootBridgeIoPollMem (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
IN UINT64 Address,
IN UINT64 Mask,
IN UINT64 Value,
IN UINT64 Delay,
OUT UINT64 *Result
);
EFI_STATUS
EFIAPI
PcatRootBridgeIoPollIo (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
IN UINT64 Address,
IN UINT64 Mask,
IN UINT64 Value,
IN UINT64 Delay,
OUT UINT64 *Result
);
EFI_STATUS
EFIAPI
PcatRootBridgeIoMemRead (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
IN UINT64 Address,
IN UINTN Count,
IN OUT VOID *Buffer
);
EFI_STATUS
EFIAPI
PcatRootBridgeIoMemWrite (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
IN UINT64 Address,
IN UINTN Count,
IN OUT VOID *Buffer
);
EFI_STATUS
EFIAPI
PcatRootBridgeIoCopyMem (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
IN UINT64 DestAddress,
IN UINT64 SrcAddress,
IN UINTN Count
);
EFI_STATUS
EFIAPI
PcatRootBridgeIoPciRead (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
IN UINT64 Address,
IN UINTN Count,
IN OUT VOID *Buffer
);
EFI_STATUS
EFIAPI
PcatRootBridgeIoPciWrite (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
IN UINT64 Address,
IN UINTN Count,
IN OUT VOID *Buffer
);
EFI_STATUS
EFIAPI
PcatRootBridgeIoMap (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_OPERATION Operation,
IN VOID *HostAddress,
IN OUT UINTN *NumberOfBytes,
OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,
OUT VOID **Mapping
);
EFI_STATUS
EFIAPI
PcatRootBridgeIoUnmap (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN VOID *Mapping
);
EFI_STATUS
EFIAPI
PcatRootBridgeIoAllocateBuffer (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN EFI_ALLOCATE_TYPE Type,
IN EFI_MEMORY_TYPE MemoryType,
IN UINTN Pages,
OUT VOID **HostAddress,
IN UINT64 Attributes
);
EFI_STATUS
EFIAPI
PcatRootBridgeIoFreeBuffer (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN UINTN Pages,
OUT VOID *HostAddress
);
EFI_STATUS
EFIAPI
PcatRootBridgeIoFlush (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This
);
EFI_STATUS
EFIAPI
PcatRootBridgeIoGetAttributes (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
OUT UINT64 *Supported,
OUT UINT64 *Attributes
);
EFI_STATUS
EFIAPI
PcatRootBridgeIoSetAttributes (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN UINT64 Attributes,
IN OUT UINT64 *ResourceBase,
IN OUT UINT64 *ResourceLength
);
EFI_STATUS
EFIAPI
PcatRootBridgeIoConfiguration (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
OUT VOID **Resources
);
//
// Private Function Prototypes
//
EFI_STATUS
EFIAPI
PcatRootBridgeIoMemRW (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
IN UINTN Count,
IN BOOLEAN InStrideFlag,
IN PTR In,
IN BOOLEAN OutStrideFlag,
OUT PTR Out
);
EFI_STATUS
PcatRootBridgeIoConstructor (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *Protocol,
IN UINTN SegmentNumber
)
/*++
Routine Description:
Contruct the Pci Root Bridge Io protocol
Arguments:
Protocol - protocol to initialize
Returns:
None
--*/
{
Protocol->ParentHandle = NULL;
Protocol->PollMem = PcatRootBridgeIoPollMem;
Protocol->PollIo = PcatRootBridgeIoPollIo;
Protocol->Mem.Read = PcatRootBridgeIoMemRead;
Protocol->Mem.Write = PcatRootBridgeIoMemWrite;
Protocol->Io.Read = PcatRootBridgeIoIoRead;
Protocol->Io.Write = PcatRootBridgeIoIoWrite;
Protocol->CopyMem = PcatRootBridgeIoCopyMem;
Protocol->Pci.Read = PcatRootBridgeIoPciRead;
Protocol->Pci.Write = PcatRootBridgeIoPciWrite;
Protocol->Map = PcatRootBridgeIoMap;
Protocol->Unmap = PcatRootBridgeIoUnmap;
Protocol->AllocateBuffer = PcatRootBridgeIoAllocateBuffer;
Protocol->FreeBuffer = PcatRootBridgeIoFreeBuffer;
Protocol->Flush = PcatRootBridgeIoFlush;
Protocol->GetAttributes = PcatRootBridgeIoGetAttributes;
Protocol->SetAttributes = PcatRootBridgeIoSetAttributes;
Protocol->Configuration = PcatRootBridgeIoConfiguration;
Protocol->SegmentNumber = (UINT32)SegmentNumber;
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
PcatRootBridgeIoPollMem (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
IN UINT64 Address,
IN UINT64 Mask,
IN UINT64 Value,
IN UINT64 Delay,
OUT UINT64 *Result
)
{
EFI_STATUS Status;
UINT64 NumberOfTicks;
UINT32 Remainder;
if (Result == NULL) {
return EFI_INVALID_PARAMETER;
}
if ((UINT32)Width > EfiPciWidthUint64) {
return EFI_INVALID_PARAMETER;
}
//
// No matter what, always do a single poll.
//
Status = This->Mem.Read (This, Width, Address, 1, Result);
if ( EFI_ERROR(Status) ) {
return Status;
}
if ( (*Result & Mask) == Value ) {
return EFI_SUCCESS;
}
if (Delay == 0) {
return EFI_SUCCESS;
} else {
NumberOfTicks = DivU64x32Remainder (Delay, 100, &Remainder);
if ( Remainder !=0 ) {
NumberOfTicks += 1;
}
NumberOfTicks += 1;
while ( NumberOfTicks ) {
gBS->Stall (10);
Status = This->Mem.Read (This, Width, Address, 1, Result);
if ( EFI_ERROR(Status) ) {
return Status;
}
if ( (*Result & Mask) == Value ) {
return EFI_SUCCESS;
}
NumberOfTicks -= 1;
}
}
return EFI_TIMEOUT;
}
EFI_STATUS
EFIAPI
PcatRootBridgeIoPollIo (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
IN UINT64 Address,
IN UINT64 Mask,
IN UINT64 Value,
IN UINT64 Delay,
OUT UINT64 *Result
)
{
EFI_STATUS Status;
UINT64 NumberOfTicks;
UINT32 Remainder;
if (Result == NULL) {
return EFI_INVALID_PARAMETER;
}
if ((UINT32)Width > EfiPciWidthUint64) {
return EFI_INVALID_PARAMETER;
}
//
// No matter what, always do a single poll.
//
Status = This->Io.Read (This, Width, Address, 1, Result);
if ( EFI_ERROR(Status) ) {
return Status;
}
if ( (*Result & Mask) == Value ) {
return EFI_SUCCESS;
}
if (Delay == 0) {
return EFI_SUCCESS;
} else {
NumberOfTicks = DivU64x32Remainder (Delay, 100, &Remainder);
if ( Remainder !=0 ) {
NumberOfTicks += 1;
}
NumberOfTicks += 1;
while ( NumberOfTicks ) {
gBS->Stall(10);
Status = This->Io.Read (This, Width, Address, 1, Result);
if ( EFI_ERROR(Status) ) {
return Status;
}
if ( (*Result & Mask) == Value ) {
return EFI_SUCCESS;
}
NumberOfTicks -= 1;
}
}
return EFI_TIMEOUT;
}
BOOLEAN
PcatRootBridgeMemAddressValid (
IN PCAT_PCI_ROOT_BRIDGE_INSTANCE *PrivateData,
IN UINT64 Address
)
{
if ((Address >= PrivateData->PciExpressBaseAddress) && (Address < PrivateData->PciExpressBaseAddress + 0x10000000)) {
return TRUE;
}
if ((Address >= PrivateData->MemBase) && (Address < PrivateData->MemLimit)) {
return TRUE;
}
return FALSE;
}
EFI_STATUS
EFIAPI
PcatRootBridgeIoMemRead (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
IN UINT64 Address,
IN UINTN Count,
IN OUT VOID *Buffer
)
{
PCAT_PCI_ROOT_BRIDGE_INSTANCE *PrivateData;
UINTN AlignMask;
PTR In;
PTR Out;
if ( Buffer == NULL ) {
return EFI_INVALID_PARAMETER;
}
PrivateData = DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS(This);
if (!PcatRootBridgeMemAddressValid (PrivateData, Address)) {
return EFI_INVALID_PARAMETER;
}
AlignMask = (1 << (Width & 0x03)) - 1;
if (Address & AlignMask) {
return EFI_INVALID_PARAMETER;
}
Address += PrivateData->PhysicalMemoryBase;
In.buf = Buffer;
Out.buf = (VOID *)(UINTN) Address;
if ((UINT32)Width <= EfiPciWidthUint64) {
return PcatRootBridgeIoMemRW (Width, Count, TRUE, In, TRUE, Out);
}
if (Width >= EfiPciWidthFifoUint8 && Width <= EfiPciWidthFifoUint64) {
return PcatRootBridgeIoMemRW (Width, Count, TRUE, In, FALSE, Out);
}
if (Width >= EfiPciWidthFillUint8 && Width <= EfiPciWidthFillUint64) {
return PcatRootBridgeIoMemRW (Width, Count, FALSE, In, TRUE, Out);
}
return EFI_INVALID_PARAMETER;
}
EFI_STATUS
EFIAPI
PcatRootBridgeIoMemWrite (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
IN UINT64 Address,
IN UINTN Count,
IN OUT VOID *Buffer
)
{
PCAT_PCI_ROOT_BRIDGE_INSTANCE *PrivateData;
UINTN AlignMask;
PTR In;
PTR Out;
if ( Buffer == NULL ) {
return EFI_INVALID_PARAMETER;
}
PrivateData = DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS(This);
if (!PcatRootBridgeMemAddressValid (PrivateData, Address)) {
return EFI_INVALID_PARAMETER;
}
AlignMask = (1 << (Width & 0x03)) - 1;
if (Address & AlignMask) {
return EFI_INVALID_PARAMETER;
}
Address += PrivateData->PhysicalMemoryBase;
In.buf = (VOID *)(UINTN) Address;
Out.buf = Buffer;
if ((UINT32)Width <= EfiPciWidthUint64) {
return PcatRootBridgeIoMemRW (Width, Count, TRUE, In, TRUE, Out);
}
if (Width >= EfiPciWidthFifoUint8 && Width <= EfiPciWidthFifoUint64) {
return PcatRootBridgeIoMemRW (Width, Count, FALSE, In, TRUE, Out);
}
if (Width >= EfiPciWidthFillUint8 && Width <= EfiPciWidthFillUint64) {
return PcatRootBridgeIoMemRW (Width, Count, TRUE, In, FALSE, Out);
}
return EFI_INVALID_PARAMETER;
}
EFI_STATUS
EFIAPI
PcatRootBridgeIoCopyMem (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
IN UINT64 DestAddress,
IN UINT64 SrcAddress,
IN UINTN Count
)
{
EFI_STATUS Status;
BOOLEAN Direction;
UINTN Stride;
UINTN Index;
UINT64 Result;
if ((UINT32)Width > EfiPciWidthUint64) {
return EFI_INVALID_PARAMETER;
}
if (DestAddress == SrcAddress) {
return EFI_SUCCESS;
}
Stride = (UINTN)1 << Width;
Direction = TRUE;
if ((DestAddress > SrcAddress) && (DestAddress < (SrcAddress + Count * Stride))) {
Direction = FALSE;
SrcAddress = SrcAddress + (Count-1) * Stride;
DestAddress = DestAddress + (Count-1) * Stride;
}
for (Index = 0;Index < Count;Index++) {
Status = PcatRootBridgeIoMemRead (
This,
Width,
SrcAddress,
1,
&Result
);
if (EFI_ERROR (Status)) {
return Status;
}
Status = PcatRootBridgeIoMemWrite (
This,
Width,
DestAddress,
1,
&Result
);
if (EFI_ERROR (Status)) {
return Status;
}
if (Direction) {
SrcAddress += Stride;
DestAddress += Stride;
} else {
SrcAddress -= Stride;
DestAddress -= Stride;
}
}
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
PcatRootBridgeIoPciRead (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
IN UINT64 Address,
IN UINTN Count,
IN OUT VOID *Buffer
)
{
if (Buffer == NULL) {
return EFI_INVALID_PARAMETER;
}
return PcatRootBridgeIoPciRW (This, FALSE, Width, Address, Count, Buffer);
}
EFI_STATUS
EFIAPI
PcatRootBridgeIoPciWrite (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
IN UINT64 Address,
IN UINTN Count,
IN OUT VOID *Buffer
)
{
if (Buffer == NULL) {
return EFI_INVALID_PARAMETER;
}
return PcatRootBridgeIoPciRW (This, TRUE, Width, Address, Count, Buffer);
}
EFI_STATUS
EFIAPI
PcatRootBridgeIoMap (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_OPERATION Operation,
IN VOID *HostAddress,
IN OUT UINTN *NumberOfBytes,
OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,
OUT VOID **Mapping
)
{
EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS PhysicalAddress;
MAP_INFO *MapInfo;
MAP_INFO_INSTANCE *MapInstance;
PCAT_PCI_ROOT_BRIDGE_INSTANCE *PrivateData;
if ( HostAddress == NULL || NumberOfBytes == NULL ||
DeviceAddress == NULL || Mapping == NULL ) {
return EFI_INVALID_PARAMETER;
}
//
// Perform a fence operation to make sure all memory operations are flushed
//
MemoryFence();
//
// Initialize the return values to their defaults
//
*Mapping = NULL;
//
// Make sure that Operation is valid
//
if ((UINT32)Operation >= EfiPciOperationMaximum) {
return EFI_INVALID_PARAMETER;
}
//
// Most PCAT like chipsets can not handle performing DMA above 4GB.
// If any part of the DMA transfer being mapped is above 4GB, then
// map the DMA transfer to a buffer below 4GB.
//
PhysicalAddress = (EFI_PHYSICAL_ADDRESS)(UINTN)HostAddress;
if ((PhysicalAddress + *NumberOfBytes) > 0x100000000ULL) {
//
// Common Buffer operations can not be remapped. If the common buffer
// if above 4GB, then it is not possible to generate a mapping, so return
// an error.
//
if (Operation == EfiPciOperationBusMasterCommonBuffer || Operation == EfiPciOperationBusMasterCommonBuffer64) {
return EFI_UNSUPPORTED;
}
//
// Allocate a MAP_INFO structure to remember the mapping when Unmap() is
// called later.
//
Status = gBS->AllocatePool (
EfiBootServicesData,
sizeof(MAP_INFO),
(VOID **)&MapInfo
);
if (EFI_ERROR (Status)) {
*NumberOfBytes = 0;
return Status;
}
//
// Return a pointer to the MAP_INFO structure in Mapping
//
*Mapping = MapInfo;
//
// Initialize the MAP_INFO structure
//
MapInfo->Operation = Operation;
MapInfo->NumberOfBytes = *NumberOfBytes;
MapInfo->NumberOfPages = EFI_SIZE_TO_PAGES(*NumberOfBytes);
MapInfo->HostAddress = PhysicalAddress;
MapInfo->MappedHostAddress = 0x00000000ffffffff;
//
// Allocate a buffer below 4GB to map the transfer to.
//
Status = gBS->AllocatePages (
AllocateMaxAddress,
EfiBootServicesData,
MapInfo->NumberOfPages,
&MapInfo->MappedHostAddress
);
if (EFI_ERROR(Status)) {
gBS->FreePool (MapInfo);
*NumberOfBytes = 0;
return Status;
}
//
// If this is a read operation from the Bus Master's point of view,
// then copy the contents of the real buffer into the mapped buffer
// so the Bus Master can read the contents of the real buffer.
//
if (Operation == EfiPciOperationBusMasterRead || Operation == EfiPciOperationBusMasterRead64) {
CopyMem (
(VOID *)(UINTN)MapInfo->MappedHostAddress,
(VOID *)(UINTN)MapInfo->HostAddress,
MapInfo->NumberOfBytes
);
}
Status =gBS->AllocatePool (
EfiBootServicesData,
sizeof(MAP_INFO_INSTANCE),
(VOID **)&MapInstance
);
if (EFI_ERROR(Status)) {
gBS->FreePages (MapInfo->MappedHostAddress,MapInfo->NumberOfPages);
gBS->FreePool (MapInfo);
*NumberOfBytes = 0;
return Status;
}
MapInstance->Map=MapInfo;
PrivateData = DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS(This);
InsertTailList(&PrivateData->MapInfo,&MapInstance->Link);
//
// The DeviceAddress is the address of the maped buffer below 4GB
//
*DeviceAddress = MapInfo->MappedHostAddress;
} else {
//
// The transfer is below 4GB, so the DeviceAddress is simply the HostAddress
//
*DeviceAddress = PhysicalAddress;
}
//
// Perform a fence operation to make sure all memory operations are flushed
//
MemoryFence();
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
PcatRootBridgeIoUnmap (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN VOID *Mapping
)
{
MAP_INFO *MapInfo;
PCAT_PCI_ROOT_BRIDGE_INSTANCE *PrivateData;
LIST_ENTRY *Link;
//
// Perform a fence operation to make sure all memory operations are flushed
//
MemoryFence();
PrivateData = DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS(This);
//
// See if the Map() operation associated with this Unmap() required a mapping buffer.
// If a mapping buffer was not required, then this function simply returns EFI_SUCCESS.
//
if (Mapping != NULL) {
//
// Get the MAP_INFO structure from Mapping
//
MapInfo = (MAP_INFO *)Mapping;
for (Link = PrivateData->MapInfo.ForwardLink; Link != &PrivateData->MapInfo; Link = Link->ForwardLink) {
if (((MAP_INFO_INSTANCE*)Link)->Map == MapInfo)
break;
}
if (Link == &PrivateData->MapInfo) {
return EFI_INVALID_PARAMETER;
}
RemoveEntryList(Link);
((MAP_INFO_INSTANCE*)Link)->Map = NULL;
gBS->FreePool((MAP_INFO_INSTANCE*)Link);
//
// If this is a write operation from the Bus Master's point of view,
// then copy the contents of the mapped buffer into the real buffer
// so the processor can read the contents of the real buffer.
//
if (MapInfo->Operation == EfiPciOperationBusMasterWrite || MapInfo->Operation == EfiPciOperationBusMasterWrite64) {
CopyMem (
(VOID *)(UINTN)MapInfo->HostAddress,
(VOID *)(UINTN)MapInfo->MappedHostAddress,
MapInfo->NumberOfBytes
);
}
//
// Free the mapped buffer and the MAP_INFO structure.
//
gBS->FreePages (MapInfo->MappedHostAddress, MapInfo->NumberOfPages);
gBS->FreePool (Mapping);
}
//
// Perform a fence operation to make sure all memory operations are flushed
//
MemoryFence();
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
PcatRootBridgeIoAllocateBuffer (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN EFI_ALLOCATE_TYPE Type,
IN EFI_MEMORY_TYPE MemoryType,
IN UINTN Pages,
OUT VOID **HostAddress,
IN UINT64 Attributes
)
{
EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS PhysicalAddress;
//
// Validate Attributes
//
if (Attributes & EFI_PCI_ATTRIBUTE_INVALID_FOR_ALLOCATE_BUFFER) {
return EFI_UNSUPPORTED;
}
//
// Check for invalid inputs
//
if (HostAddress == NULL) {
return EFI_INVALID_PARAMETER;
}
//
// The only valid memory types are EfiBootServicesData and EfiRuntimeServicesData
//
if (MemoryType != EfiBootServicesData && MemoryType != EfiRuntimeServicesData) {
return EFI_INVALID_PARAMETER;
}
//
// Limit allocations to memory below 4GB
//
PhysicalAddress = (EFI_PHYSICAL_ADDRESS)(0xffffffff);
Status = gBS->AllocatePages (AllocateMaxAddress, MemoryType, Pages, &PhysicalAddress);
if (EFI_ERROR (Status)) {
return Status;
}
*HostAddress = (VOID *)(UINTN)PhysicalAddress;
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
PcatRootBridgeIoFreeBuffer (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN UINTN Pages,
OUT VOID *HostAddress
)
{
if( HostAddress == NULL ){
return EFI_INVALID_PARAMETER;
}
return gBS->FreePages ((EFI_PHYSICAL_ADDRESS)(UINTN)HostAddress, Pages);
}
EFI_STATUS
EFIAPI
PcatRootBridgeIoFlush (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This
)
{
//
// Perform a fence operation to make sure all memory operations are flushed
//
MemoryFence();
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
PcatRootBridgeIoGetAttributes (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
OUT UINT64 *Supported, OPTIONAL
OUT UINT64 *Attributes
)
{
PCAT_PCI_ROOT_BRIDGE_INSTANCE *PrivateData;
PrivateData = DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS(This);
if (Attributes == NULL && Supported == NULL) {
return EFI_INVALID_PARAMETER;
}
//
// Supported is an OPTIONAL parameter. See if it is NULL
//
if (Supported) {
//
// This is a generic driver for a PC-AT class system. It does not have any
// chipset specific knowlegde, so none of the attributes can be set or
// cleared. Any attempt to set attribute that are already set will succeed,
// and any attempt to set an attribute that is not supported will fail.
//
*Supported = PrivateData->Attributes;
}
//
// Set Attrbutes to the attributes detected when the PCI Root Bridge was initialized
//
if (Attributes) {
*Attributes = PrivateData->Attributes;
}
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
PcatRootBridgeIoSetAttributes (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN UINT64 Attributes,
IN OUT UINT64 *ResourceBase,
IN OUT UINT64 *ResourceLength
)
{
PCAT_PCI_ROOT_BRIDGE_INSTANCE *PrivateData;
PrivateData = DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS(This);
//
// This is a generic driver for a PC-AT class system. It does not have any
// chipset specific knowlegde, so none of the attributes can be set or
// cleared. Any attempt to set attribute that are already set will succeed,
// and any attempt to set an attribute that is not supported will fail.
//
if (Attributes & (~PrivateData->Attributes)) {
return EFI_UNSUPPORTED;
}
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
PcatRootBridgeIoConfiguration (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
OUT VOID **Resources
)
{
PCAT_PCI_ROOT_BRIDGE_INSTANCE *PrivateData;
PrivateData = DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS(This);
*Resources = PrivateData->Configuration;
return EFI_SUCCESS;
}
//
// Internal function
//
EFI_STATUS
EFIAPI
PcatRootBridgeIoMemRW (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
IN UINTN Count,
IN BOOLEAN InStrideFlag,
IN PTR In,
IN BOOLEAN OutStrideFlag,
OUT PTR Out
)
/*++
Routine Description:
Private service to provide the memory read/write
Arguments:
Width of the Memory Access
Count of the number of accesses to perform
Returns:
Status
EFI_SUCCESS - Successful transaction
EFI_INVALID_PARAMETER - Unsupported width and address combination
--*/
{
UINTN Stride;
UINTN InStride;
UINTN OutStride;
Width = (EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH) (Width & 0x03);
Stride = (UINTN)1 << Width;
InStride = InStrideFlag ? Stride : 0;
OutStride = OutStrideFlag ? Stride : 0;
//
// Loop for each iteration and move the data
//
switch (Width) {
case EfiPciWidthUint8:
for (;Count > 0; Count--, In.buf += InStride, Out.buf += OutStride) {
MemoryFence();
*In.ui8 = *Out.ui8;
MemoryFence();
}
break;
case EfiPciWidthUint16:
for (;Count > 0; Count--, In.buf += InStride, Out.buf += OutStride) {
MemoryFence();
*In.ui16 = *Out.ui16;
MemoryFence();
}
break;
case EfiPciWidthUint32:
for (;Count > 0; Count--, In.buf += InStride, Out.buf += OutStride) {
MemoryFence();
*In.ui32 = *Out.ui32;
MemoryFence();
}
break;
default:
return EFI_INVALID_PARAMETER;
}
return EFI_SUCCESS;
}