diff options
Diffstat (limited to 'Silicon/BroxtonSoC/BroxtonSiPkg/NorthCluster/PciHostBridge/Dxe/PciRootBridgeIo.c')
| -rw-r--r-- | Silicon/BroxtonSoC/BroxtonSiPkg/NorthCluster/PciHostBridge/Dxe/PciRootBridgeIo.c | 1563 |
1 files changed, 1563 insertions, 0 deletions
diff --git a/Silicon/BroxtonSoC/BroxtonSiPkg/NorthCluster/PciHostBridge/Dxe/PciRootBridgeIo.c b/Silicon/BroxtonSoC/BroxtonSiPkg/NorthCluster/PciHostBridge/Dxe/PciRootBridgeIo.c new file mode 100644 index 0000000000..e5e2e8605f --- /dev/null +++ b/Silicon/BroxtonSoC/BroxtonSiPkg/NorthCluster/PciHostBridge/Dxe/PciRootBridgeIo.c @@ -0,0 +1,1563 @@ +/** @file
+ EFI Memory Controller PCI Root Bridge Io Protocol.
+
+ Copyright (c) 1999 - 2016, Intel Corporation. All rights reserved.<BR>
+
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php.
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include "PciRootBridge.h"
+#include <IndustryStandard/Pci22.h>
+
+typedef struct {
+ EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR SpaceDesp[TypeMax];
+ EFI_ACPI_END_TAG_DESCRIPTOR EndDesp;
+} RESOURCE_CONFIGURATION;
+
+RESOURCE_CONFIGURATION Configuration = {
+ {
+ {
+ 0x8A,
+ 0x2B,
+ 1,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0
+ },
+ {
+ 0x8A,
+ 0x2B,
+ 0,
+ 0,
+ 0,
+ 32,
+ 0,
+ 0,
+ 0,
+ 0
+ },
+ {
+ 0x8A,
+ 0x2B,
+ 0,
+ 0,
+ 6,
+ 32,
+ 0,
+ 0,
+ 0,
+ 0
+ },
+ {
+ 0x8A,
+ 0x2B,
+ 0,
+ 0,
+ 0,
+ 64,
+ 0,
+ 0,
+ 0,
+ 0
+ },
+ {
+ 0x8A,
+ 0x2B,
+ 0,
+ 0,
+ 6,
+ 64,
+ 0,
+ 0,
+ 0,
+ 0
+ },
+ {
+ 0x8A,
+ 0x2B,
+ 2,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0
+ }
+ },
+ {
+ 0x79,
+ 0
+ }
+};
+
+//
+// Protocol Member Function Prototypes
+//
+EFI_STATUS
+EFIAPI
+RootBridgeIoPollMem (
+ 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
+RootBridgeIoPollIo (
+ 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
+RootBridgeIoMemRead (
+ 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
+RootBridgeIoMemWrite (
+ 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
+RootBridgeIoIoRead (
+ IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
+ IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
+ IN UINT64 UserAddress,
+ IN UINTN Count,
+ IN OUT VOID *UserBuffer
+ );
+
+EFI_STATUS
+EFIAPI
+RootBridgeIoIoWrite (
+ IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
+ IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
+ IN UINT64 UserAddress,
+ IN UINTN Count,
+ IN OUT VOID *UserBuffer
+ );
+
+EFI_STATUS
+EFIAPI
+RootBridgeIoCopyMem (
+ IN struct _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
+RootBridgeIoPciRead (
+ 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
+RootBridgeIoPciWrite (
+ 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
+RootBridgeIoMap (
+ 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
+RootBridgeIoUnmap (
+ IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
+ IN VOID *Mapping
+ );
+
+EFI_STATUS
+EFIAPI
+RootBridgeIoAllocateBuffer (
+ 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
+RootBridgeIoFreeBuffer (
+ IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
+ IN UINTN Pages,
+ OUT VOID *HostAddress
+ );
+
+EFI_STATUS
+EFIAPI
+RootBridgeIoFlush (
+ IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This
+ );
+
+EFI_STATUS
+EFIAPI
+RootBridgeIoGetAttributes (
+ IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
+ OUT UINT64 *Supported,
+ OUT UINT64 *Attributes
+ );
+
+EFI_STATUS
+EFIAPI
+RootBridgeIoSetAttributes (
+ IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
+ IN UINT64 Attributes,
+ IN OUT UINT64 *ResourceBase,
+ IN OUT UINT64 *ResourceLength
+ );
+
+EFI_STATUS
+EFIAPI
+RootBridgeIoConfiguration (
+ IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
+ OUT VOID **Resources
+ );
+
+//
+// Sub Function Prototypes
+//
+typedef union {
+ UINT8 volatile *buf;
+ UINT8 volatile *ui8;
+ UINT16 volatile *ui16;
+ UINT32 volatile *ui32;
+ UINT64 volatile *ui64;
+ UINTN volatile ui;
+} PTR;
+
+STATIC
+EFI_STATUS
+RootBridgeIoPciRW (
+ IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
+ IN BOOLEAN Write,
+ IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
+ IN UINT64 UserAddress,
+ IN UINTN Count,
+ IN OUT VOID *UserBuffer
+ );
+
+//
+// Memory Controller Pci Root Bridge Io Module Variables
+//
+EFI_METRONOME_ARCH_PROTOCOL *mMetronome;
+EFI_CPU_IO2_PROTOCOL *mCpuIo;
+
+/**
+ Construct the Pci Root Bridge Io protocol.
+
+ @param[in] Protocol Point to protocol instance.
+ @param[in] HostBridgeHandle Handle of host bridge.
+ @param[in] Attri Attribute of host bridge.
+ @param[in] ResAperture ResourceAperture for host bridge.
+
+ @retval EFI_SUCCESS Success to initialize the Pci Root Bridge.
+
+**/
+EFI_STATUS
+RootBridgeConstructor (
+ IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *Protocol,
+ IN EFI_HANDLE HostBridgeHandle,
+ IN UINT64 Attri,
+ IN PCI_ROOT_BRIDGE_RESOURCE_APPETURE *ResAppeture
+ )
+{
+ EFI_STATUS Status;
+ PCI_ROOT_BRIDGE_INSTANCE *PrivateData;
+ PCI_RESOURCE_TYPE Index;
+
+ PrivateData = DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS (Protocol);
+
+ //
+ // The host to pci bridge, the host memory and io addresses are
+ // direct mapped to pci addresses, so no need translate, set bases to 0.
+ //
+ PrivateData->MemBase = ResAppeture->MemBase;
+ PrivateData->IoBase = ResAppeture->IoBase;
+
+ //
+ // The host bridge only supports 32bit addressing for memory
+ // and standard IA32 16bit io
+ //
+ PrivateData->MemLimit = ResAppeture->MemLimit;
+ PrivateData->IoLimit = ResAppeture->IoLimit;
+
+ //
+ // Bus Aperture for this Root Bridge (Possible Range)
+ //
+ PrivateData->BusBase = ResAppeture->BusBase;
+ PrivateData->BusLimit = ResAppeture->BusLimit;
+
+ //
+ // Specific for this chipset
+ //
+ for (Index = TypeIo; Index < TypeMax; Index++) {
+ PrivateData->ResAllocNode[Index].Type = Index;
+ PrivateData->ResAllocNode[Index].Base = 0;
+ PrivateData->ResAllocNode[Index].Length = 0;
+ PrivateData->ResAllocNode[Index].Status = ResNone;
+ }
+
+ EfiInitializeLock (&PrivateData->PciLock, TPL_HIGH_LEVEL);
+ PrivateData->PciAddress = 0xCF8;
+ PrivateData->PciData = 0xCFC;
+ PrivateData->RootBridgeAttrib = Attri;
+ PrivateData->Attributes = 0;
+
+ PrivateData->Supports = EFI_PCI_ATTRIBUTE_IDE_PRIMARY_IO |
+ EFI_PCI_ATTRIBUTE_ISA_IO |
+ EFI_PCI_ATTRIBUTE_VGA_PALETTE_IO |
+ EFI_PCI_ATTRIBUTE_VGA_MEMORY |
+ EFI_PCI_ATTRIBUTE_VGA_IO;
+
+ Protocol->ParentHandle = HostBridgeHandle;
+
+ Protocol->PollMem = RootBridgeIoPollMem;
+ Protocol->PollIo = RootBridgeIoPollIo;
+
+ Protocol->Mem.Read = RootBridgeIoMemRead;
+ Protocol->Mem.Write = RootBridgeIoMemWrite;
+
+ Protocol->Io.Read = RootBridgeIoIoRead;
+ Protocol->Io.Write = RootBridgeIoIoWrite;
+
+ Protocol->CopyMem = RootBridgeIoCopyMem;
+
+ Protocol->Pci.Read = RootBridgeIoPciRead;
+ Protocol->Pci.Write = RootBridgeIoPciWrite;
+
+ Protocol->Map = RootBridgeIoMap;
+ Protocol->Unmap = RootBridgeIoUnmap;
+
+ Protocol->AllocateBuffer = RootBridgeIoAllocateBuffer;
+ Protocol->FreeBuffer = RootBridgeIoFreeBuffer;
+
+ Protocol->Flush = RootBridgeIoFlush;
+
+ Protocol->GetAttributes = RootBridgeIoGetAttributes;
+ Protocol->SetAttributes = RootBridgeIoSetAttributes;
+
+ Protocol->Configuration = RootBridgeIoConfiguration;
+
+ Protocol->SegmentNumber = 0;
+
+ Status = gBS->LocateProtocol (&gEfiMetronomeArchProtocolGuid, NULL, (VOID **) &mMetronome);
+ ASSERT_EFI_ERROR (Status);
+
+ Status = gBS->LocateProtocol (&gEfiCpuIo2ProtocolGuid, NULL, (VOID **) &mCpuIo);
+ ASSERT_EFI_ERROR (Status);
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Polls an address in memory mapped I/O space until an exit condition is met, or
+ a timeout occurs.
+
+ @param[in] This A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
+ @param[in] Width Signifies the width of the memory operations.
+ @param[in] Address The base address of the memory operations. The caller is
+ responsible for aligning Address if required.
+ @param[in] Mask Mask used for the polling criteria. Bytes above Width in Mask
+ are ignored. The bits in the bytes below Width which are zero in
+ Mask are ignored when polling the memory address.
+ @param[in] Value The comparison value used for the polling exit criteria.
+ @param[in] Delay The number of 100 ns units to poll. Note that timer available may
+ be of poorer granularity.
+ @param[out] Result Pointer to the last value read from the memory location.
+
+ @retval EFI_SUCCESS The last data returned from the access matched the poll exit criteria.
+ @retval EFI_INVALID_PARAMETER Width is invalid or Result is NULL.
+ @retval EFI_TIMEOUT Delay expired before a match occurred.
+
+**/
+EFI_STATUS
+EFIAPI
+RootBridgeIoPollMem (
+ 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;
+ UINTN Remainder;
+
+ if (Result == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (Width < 0 || 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 {
+ //
+ // Determine the proper # of metronome ticks to wait for polling the
+ // location. The nuber of ticks is Roundup (Delay / mMetronome->TickPeriod)+1
+ // The "+1" to account for the possibility of the first tick being short
+ // because we started in the middle of a tick.
+ //
+ // BugBug: overriding mMetronome->TickPeriod with UINT32 until Metronome
+ // protocol definition is updated.
+ //
+ NumberOfTicks = DivU64x32Remainder (Delay, (UINT32) mMetronome->TickPeriod, (UINT32 *) &Remainder);
+ if (Remainder != 0) {
+ NumberOfTicks += 1;
+ }
+
+ NumberOfTicks += 1;
+
+ while (NumberOfTicks) {
+ mMetronome->WaitForTick (mMetronome, 1);
+ 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;
+}
+
+
+/**
+ Reads from the I/O space of a PCI Root Bridge. Returns when either the polling exit criteria is
+ satisfied or after a defined duration.
+
+ @param[in] This A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
+ @param[in] Width Signifies the width of the I/O operations.
+ @param[in] Address The base address of the I/O operations. The caller is responsible
+ for aligning Address if required.
+ @param[in] Mask Mask used for the polling criteria. Bytes above Width in Mask
+ are ignored. The bits in the bytes below Width which are zero in
+ Mask are ignored when polling the I/O address.
+ @param[in] Value The comparison value used for the polling exit criteria.
+ @param[in] Delay The number of 100 ns units to poll. Note that timer available may
+ be of poorer granularity.
+ @param[out] Result Pointer to the last value read from the memory location.
+
+ @retval EFI_SUCCESS The last data returned from the access matched the poll exit criteria.
+ @retval EFI_INVALID_PARAMETER Width is invalid or Result is NULL.
+ @retval EFI_TIMEOUT Delay expired before a match occurred.
+
+**/
+EFI_STATUS
+EFIAPI
+RootBridgeIoPollIo (
+ 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;
+ UINTN Remainder;
+
+ //
+ // No matter what, always do a single poll.
+ //
+ if (Result == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (Width < 0 || Width > EfiPciWidthUint64) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ 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 {
+ //
+ // Determine the proper # of metronome ticks to wait for polling the
+ // location. The number of ticks is Roundup (Delay / mMetronome->TickPeriod)+1
+ // The "+1" to account for the possibility of the first tick being short
+ // because we started in the middle of a tick.
+ //
+ NumberOfTicks = DivU64x32Remainder (Delay, (UINT32) mMetronome->TickPeriod, (UINT32 *) &Remainder);
+ if (Remainder != 0) {
+ NumberOfTicks += 1;
+ }
+
+ NumberOfTicks += 1;
+
+ while (NumberOfTicks) {
+ mMetronome->WaitForTick (mMetronome, 1);
+ 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;
+}
+
+
+/**
+ Enables a PCI driver to access PCI controller registers in the PCI root bridge memory space.
+
+ @param[in] This A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
+ @param[in] Width Signifies the width of the memory operation.
+ @param[in] Address The base address of the memory operation. The caller is
+ responsible for aligning the Address if required.
+ @param[in] Count The number of memory operations to perform. Bytes moved is
+ Width size * Count, starting at Address.
+ @param[in, out] Buffer For read operations, the destination buffer to store the results. For
+ write operations, the source buffer to write data from.
+
+ @retval EFI_SUCCESS The data was read from or written to the PCI root bridge.
+ @retval EFI_INVALID_PARAMETER Width is invalid for this PCI root bridge or Buffer is NULL.
+
+**/
+EFI_STATUS
+EFIAPI
+RootBridgeIoMemRead (
+ 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
+ )
+{
+ PCI_ROOT_BRIDGE_INSTANCE *PrivateData;
+ EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH OldWidth;
+ UINTN OldCount;
+
+ if (Buffer == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (Width < 0 || Width >= EfiPciWidthMaximum) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ PrivateData = DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS (This);
+
+ //
+ // Check memory access limit
+ //
+ if (Address < PrivateData->MemBase) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ OldWidth = Width;
+ OldCount = Count;
+ if (Width >= EfiPciWidthFifoUint8 && Width <= EfiPciWidthFifoUint64) {
+ Count = 1;
+ }
+
+ Width &= 0x03;
+ if (Address + MultU64x32 (LShiftU64 (1, Width), (UINT32) Count) - 1 > PrivateData->MemLimit) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ return mCpuIo->Mem.Read (
+ mCpuIo,
+ (EFI_CPU_IO_PROTOCOL_WIDTH) OldWidth,
+ Address,
+ OldCount,
+ Buffer
+ );
+}
+
+
+/**
+ Enables a PCI driver to access PCI controller registers in the PCI root bridge memory space.
+
+ @param[in] This A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
+ @param[in] Width Signifies the width of the memory operation.
+ @param[in] Address The base address of the memory operation. The caller is
+ responsible for aligning the Address if required.
+ @param[in] Count The number of memory operations to perform. Bytes moved is
+ Width size * Count, starting at Address.
+ @param[in, out] Buffer For read operations, the destination buffer to store the results. For
+ write operations, the source buffer to write data from.
+
+ @retval EFI_SUCCESS The data was read from or written to the PCI root bridge.
+ @retval EFI_INVALID_PARAMETER Width is invalid for this PCI root bridge or Buffer is NULL.
+
+**/
+EFI_STATUS
+EFIAPI
+RootBridgeIoMemWrite (
+ 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
+ )
+{
+ PCI_ROOT_BRIDGE_INSTANCE *PrivateData;
+ EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH OldWidth;
+ UINTN OldCount;
+
+ if (Buffer == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (Width < 0 || Width >= EfiPciWidthMaximum) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ PrivateData = DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS (This);
+
+ //
+ // Check memory access limit
+ //
+ if (Address < PrivateData->MemBase) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ OldWidth = Width;
+ OldCount = Count;
+ if (Width >= EfiPciWidthFifoUint8 && Width <= EfiPciWidthFifoUint64) {
+ Count = 1;
+ }
+
+ Width &= 0x03;
+ if (Address + MultU64x32 (LShiftU64 (1, Width), (UINT32) Count) - 1 > PrivateData->MemLimit) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ return mCpuIo->Mem.Write (
+ mCpuIo,
+ (EFI_CPU_IO_PROTOCOL_WIDTH) OldWidth,
+ Address,
+ OldCount,
+ Buffer
+ );
+}
+
+/**
+ Enables a PCI driver to access PCI controller registers in the PCI root bridge I/O space.
+
+ @param[in] This A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
+ @param[in] Width Signifies the width of the memory operations.
+ @param[in] UserAddress The base address of the I/O operation. The caller is responsible for
+ aligning the Address if required.
+ @param[in] Count The number of I/O operations to perform. Bytes moved is Width
+ size * Count, starting at Address.
+ @param[in, out] UserBuffer For read operations, the destination buffer to store the results. For
+ write operations, the source buffer to write data from.
+
+ @retval EFI_SUCCESS The data was read from or written to the PCI root bridge.
+ @retval EFI_INVALID_PARAMETER Width is invalid for this PCI root bridge or Buffer is NULL.
+
+**/
+EFI_STATUS
+EFIAPI
+RootBridgeIoIoRead (
+ 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
+ )
+{
+ UINTN AlignMask;
+ PCI_ROOT_BRIDGE_INSTANCE *PrivateData;
+ EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH OldWidth;
+ UINTN OldCount;
+
+ if (Buffer == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (Width < 0 || Width >= EfiPciWidthMaximum) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ PrivateData = DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS (This);
+
+ //
+ // AlignMask = (1 << Width) - 1;
+ //
+ AlignMask = (1 << (Width & 0x03)) - 1;
+
+ //
+ // Check Io access limit
+ //
+ if (Address < PrivateData->IoBase) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ OldWidth = Width;
+ OldCount = Count;
+ if (Width >= EfiPciWidthFifoUint8 && Width <= EfiPciWidthFifoUint64) {
+ Count = 1;
+ }
+
+ Width &= 0x03;
+ if (Address + MultU64x32 (LShiftU64 (1, Width), (UINT32) Count) - 1 >= PrivateData->IoLimit) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (Address & AlignMask) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ return mCpuIo->Io.Read (
+ mCpuIo,
+ (EFI_CPU_IO_PROTOCOL_WIDTH) OldWidth,
+ Address,
+ OldCount,
+ Buffer
+ );
+
+}
+
+
+/**
+ Enables a PCI driver to access PCI controller registers in the PCI root bridge I/O space.
+
+ @param[in] This A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
+ @param[in] Width Signifies the width of the memory operations.
+ @param[in] UserAddress The base address of the I/O operation. The caller is responsible for
+ aligning the Address if required.
+ @param[in] Count The number of I/O operations to perform. Bytes moved is Width
+ size * Count, starting at Address.
+ @param[in, out] UserBuffer For read operations, the destination buffer to store the results. For
+ write operations, the source buffer to write data from.
+
+ @retval EFI_SUCCESS The data was read from or written to the PCI root bridge.
+ @retval EFI_INVALID_PARAMETER Width is invalid for this PCI root bridge or Buffer is NULL.
+
+**/
+EFI_STATUS
+EFIAPI
+RootBridgeIoIoWrite (
+ 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
+ )
+{
+ UINTN AlignMask;
+ PCI_ROOT_BRIDGE_INSTANCE *PrivateData;
+ EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH OldWidth;
+ UINTN OldCount;
+
+ if (Buffer == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (Width < 0 || Width >= EfiPciWidthMaximum) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ PrivateData = DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS (This);
+
+ //
+ // AlignMask = (1 << Width) - 1;
+ //
+ AlignMask = (1 << (Width & 0x03)) - 1;
+
+ //
+ // Check Io access limit
+ //
+ if (Address < PrivateData->IoBase) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ OldWidth = Width;
+ OldCount = Count;
+ if (Width >= EfiPciWidthFifoUint8 && Width <= EfiPciWidthFifoUint64) {
+ Count = 1;
+ }
+
+ Width &= 0x03;
+ if (Address + MultU64x32 (LShiftU64 (1, Width), (UINT32) Count) - 1 >= PrivateData->IoLimit) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (Address & AlignMask) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ return mCpuIo->Io.Write (
+ mCpuIo,
+ (EFI_CPU_IO_PROTOCOL_WIDTH) OldWidth,
+ Address,
+ OldCount,
+ Buffer
+ );
+
+}
+
+
+/**
+ Enables a PCI driver to copy one region of PCI root bridge memory space to another region of PCI
+ root bridge memory space.
+
+ @param[in] This A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL instance.
+ @param[in] Width Signifies the width of the memory operations.
+ @param[in] DestAddress The destination address of the memory operation. The caller is
+ responsible for aligning the DestAddress if required.
+ @param[in] SrcAddress The source address of the memory operation. The caller is
+ responsible for aligning the SrcAddress if required.
+ @param[in] Count The number of memory operations to perform. Bytes moved is
+ Width size * Count, starting at DestAddress and SrcAddress.
+
+ @retval EFI_SUCCESS The data was copied from one memory region to another memory region.
+ @retval EFI_INVALID_PARAMETER Width is invalid for this PCI root bridge.
+
+**/
+EFI_STATUS
+EFIAPI
+RootBridgeIoCopyMem (
+ IN struct _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 (Width < 0 || Width > EfiPciWidthUint64) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (DestAddress == SrcAddress) {
+ return EFI_SUCCESS;
+ }
+
+ Stride = (UINTN) (LShiftU64 (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 = RootBridgeIoMemRead (
+ This,
+ Width,
+ SrcAddress,
+ 1,
+ &Result
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = RootBridgeIoMemWrite (
+ 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;
+}
+
+
+/**
+ Enables a PCI driver to access PCI controller registers in a PCI root bridge's configuration space.
+
+ @param[in] This A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
+ @param[in] Width Signifies the width of the memory operations.
+ @param[in] Address The address within the PCI configuration space for the PCI controller.
+ @param[in] Count The number of PCI configuration operations to perform. Bytes
+ moved is Width size * Count, starting at Address.
+ @param[in, out] Buffer For read operations, the destination buffer to store the results. For
+ write operations, the source buffer to write data from.
+
+ @retval EFI_SUCCESS The data was read from or written to the PCI root bridge.
+ @retval EFI_INVALID_PARAMETER Width is invalid for this PCI root bridge or Buffer is NULL.
+
+**/
+EFI_STATUS
+EFIAPI
+RootBridgeIoPciRead (
+ 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;
+ }
+
+ if (Width < 0 || Width >= EfiPciWidthMaximum) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Read Pci configuration space
+ //
+ return RootBridgeIoPciRW (This, FALSE, Width, Address, Count, Buffer);
+}
+
+
+/**
+ Enables a PCI driver to access PCI controller registers in a PCI root bridge's configuration space.
+
+ @param[in] This A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
+ @param[in] Width Signifies the width of the memory operations.
+ @param[in] Address The address within the PCI configuration space for the PCI controller.
+ @param[in] Count The number of PCI configuration operations to perform. Bytes
+ moved is Width size * Count, starting at Address.
+ @param[in, out] Buffer For read operations, the destination buffer to store the results. For
+ write operations, the source buffer to write data from.
+
+ @retval EFI_SUCCESS The data was read from or written to the PCI root bridge.
+ @retval EFI_INVALID_PARAMETER Width is invalid for this PCI root bridge or Buffer is NULL.
+
+**/
+EFI_STATUS
+EFIAPI
+RootBridgeIoPciWrite (
+ 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;
+ }
+
+ if (Width < 0 || Width >= EfiPciWidthMaximum) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Write Pci configuration space
+ //
+ return RootBridgeIoPciRW (This, TRUE, Width, Address, Count, Buffer);
+}
+
+
+/**
+ Provides the PCI controller-specific addresses required to access system memory from a
+ DMA bus master.
+
+ @param[in] This A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
+ @param[in] Operation Indicates if the bus master is going to read or write to system memory.
+ @param[in] HostAddress The system memory address to map to the PCI controller.
+ @param[in, out] NumberOfBytes On input the number of bytes to map. On output the number of bytes that were mapped.
+ @param[out] DeviceAddress The resulting map address for the bus master PCI controller to use
+ to access the system memory's HostAddress.
+ @param[out] Mapping The value to pass to Unmap() when the bus master DMA operation is complete.
+
+ @retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes.
+ @retval EFI_INVALID_PARAMETER Operation is invalid.
+ @retval EFI_INVALID_PARAMETER HostAddress or NumberOfBytes or DeviceAddress or Mapping is NULL.
+ @retval EFI_UNSUPPORTED The HostAddress cannot be mapped as a common buffer.
+
+**/
+EFI_STATUS
+EFIAPI
+RootBridgeIoMap (
+ 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_PHYSICAL_ADDRESS PhysicalAddress;
+ MAP_INFO *MapInfo;
+
+ if (HostAddress == NULL || NumberOfBytes == NULL || DeviceAddress == NULL || Mapping == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+ //
+ // Initialize the return values to their defaults
+ //
+ *Mapping = NULL;
+
+ //
+ // Make sure that Operation is valid
+ //
+ if (Operation < 0 || 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) > 0x100000000) {
+ //
+ // 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.
+ //
+ MapInfo = AllocatePool (sizeof (MAP_INFO));
+ if (!MapInfo) {
+ *NumberOfBytes = 0;
+ return EFI_OUT_OF_RESOURCES;
+ }
+ //
+ // 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.
+ //
+ MapInfo->MappedHostAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) AllocatePages (MapInfo->NumberOfPages);
+ if (!(MapInfo->MappedHostAddress)) {
+ FreePool (MapInfo);
+ *NumberOfBytes = 0;
+ return EFI_OUT_OF_RESOURCES;
+ }
+ //
+ // 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
+ );
+ }
+ //
+ // 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;
+ }
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Completes the Map() operation and releases any corresponding resources.
+
+ @param[in] This A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
+ @param[in] Mapping The mapping value returned from Map().
+
+ @retval EFI_SUCCESS The range was unmapped.
+ @retval EFI_INVALID_PARAMETER Mapping is not a value that was returned by Map().
+
+**/
+EFI_STATUS
+EFIAPI
+RootBridgeIoUnmap (
+ IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
+ IN VOID *Mapping
+ )
+{
+ MAP_INFO *MapInfo;
+
+ //
+ // 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;
+
+ //
+ // 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.
+ //
+#ifndef __GNUC__
+#pragma warning (disable: 4305)
+#endif
+ FreePages ((VOID *) (UINTN) MapInfo->MappedHostAddress, MapInfo->NumberOfPages);
+#ifndef __GNUC__
+#pragma warning (default: 4305)
+#endif
+ FreePool (Mapping);
+ }
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Allocates pages that are suitable for an EfiPciOperationBusMasterCommonBuffer or
+ EfiPciOperationBusMasterCommonBuffer64 mapping.
+
+ @param[in] This A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
+ @param[in] Type This parameter is not used and must be ignored.
+ @param[in] MemoryType The type of memory to allocate, EfiBootServicesData or EfiRuntimeServicesData.
+ @param[in] Pages The number of pages to allocate.
+ @param[out] HostAddress A pointer to store the base system memory address of the allocated range.
+ @param[in] Attributes The requested bit mask of attributes for the allocated range. Only
+ the attributes EFI_PCI_ATTRIBUTE_MEMORY_WRITE_COMBINE, EFI_PCI_ATTRIBUTE_MEMORY_CACHED,
+ and EFI_PCI_ATTRIBUTE_DUAL_ADDRESS_CYCLE may be used with this function.
+
+ @retval EFI_SUCCESS The requested memory pages were allocated.
+ @retval EFI_INVALID_PARAMETER MemoryType is invalid or HostAddress is NULL.
+ @retval EFI_UNSUPPORTED Attributes is unsupported. The only legal attribute bits are
+ MEMORY_WRITE_COMBINE, MEMORY_CACHED, and DUAL_ADDRESS_CYCLE.
+
+**/
+EFI_STATUS
+EFIAPI
+RootBridgeIoAllocateBuffer (
+ 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_PHYSICAL_ADDRESS PhysicalAddress;
+ EFI_STATUS Status;
+
+ //
+ // 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;
+}
+
+
+/**
+ Frees memory that was allocated with AllocateBuffer().
+ The FreeBuffer() function frees memory that was allocated with AllocateBuffer().
+
+ @param[in] This A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
+ @param[in] Pages The number of pages to free.
+ @param[out] HostAddress The base system memory address of the allocated range.
+
+ @retval EFI_SUCCESS The requested memory pages were freed.
+ @retval EFI_INVALID_PARAMETER The memory range specified by HostAddress and Pages
+ was not allocated with AllocateBuffer().
+
+**/
+EFI_STATUS
+EFIAPI
+RootBridgeIoFreeBuffer (
+ IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
+ IN UINTN Pages,
+ OUT VOID *HostAddress
+ )
+{
+ FreePages ((VOID *) HostAddress, Pages);
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Flushes all PCI posted write transactions from a PCI host bridge to system memory.
+
+ @param[in] This A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
+
+ @retval EFI_SUCCESS The PCI posted write transactions were flushed from the PCI host
+ bridge to system memory.
+
+**/
+EFI_STATUS
+EFIAPI
+RootBridgeIoFlush (
+ IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This
+ )
+{
+ //
+ // not supported yet
+ //
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Gets the attributes that a PCI root bridge supports setting with SetAttributes(), and the
+ attributes that a PCI root bridge is currently using.
+
+ @param[in] This A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
+ @param[out] Supported A pointer to the mask of attributes that this PCI root bridge
+ supports setting with SetAttributes().
+ @param[out] Attributes A pointer to the mask of attributes that this PCI root bridge is
+ currently using.
+
+ @retval EFI_SUCCESS If Supports is not NULL, then the attributes that the PCI root
+ bridge supports is returned in Supports. If Attributes is
+ not NULL, then the attributes that the PCI root bridge is currently
+ using is returned in Attributes.
+ @retval EFI_INVALID_PARAMETER Both Supports and Attributes are NULL.
+
+**/
+EFI_STATUS
+EFIAPI
+RootBridgeIoGetAttributes (
+ IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
+ OUT UINT64 *Supported,
+ OUT UINT64 *Attributes
+ )
+{
+ PCI_ROOT_BRIDGE_INSTANCE *PrivateData;
+
+ PrivateData = DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS (This);
+
+ if (Attributes == NULL && Supported == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+ //
+ // Set the return value for Supported and Attributes
+ //
+ if (Supported) {
+ *Supported = PrivateData->Supports;
+ }
+
+ if (Attributes) {
+ *Attributes = PrivateData->Attributes;
+ }
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Sets attributes for a resource range on a PCI root bridge.
+
+ @param[in] This A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
+ @param[in] Attributes The mask of attributes to set. If the attribute bit
+ MEMORY_WRITE_COMBINE, MEMORY_CACHED, or
+ MEMORY_DISABLE is set, then the resource range is specified by
+ ResourceBase and ResourceLength. If
+ MEMORY_WRITE_COMBINE, MEMORY_CACHED, and
+ MEMORY_DISABLE are not set, then ResourceBase and
+ ResourceLength are ignored, and may be NULL.
+ @param[in, out] ResourceBase A pointer to the base address of the resource range to be modified
+ by the attributes specified by Attributes.
+ @param[in, out] ResourceLength A pointer to the length of the resource range to be modified by the
+ attributes specified by Attributes.
+
+ @retval EFI_SUCCESS The current configuration of this PCI root bridge was returned in Resources.
+ @retval EFI_UNSUPPORTED The current configuration of this PCI root bridge could not be retrieved.
+
+**/
+EFI_STATUS
+EFIAPI
+RootBridgeIoSetAttributes (
+ IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
+ IN UINT64 Attributes,
+ IN OUT UINT64 *ResourceBase,
+ IN OUT UINT64 *ResourceLength
+ )
+{
+ PCI_ROOT_BRIDGE_INSTANCE *PrivateData;
+
+ PrivateData = DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS (This);
+
+ if (Attributes) {
+ if ((Attributes & (~(PrivateData->Supports))) != 0) {
+ return EFI_UNSUPPORTED;
+ }
+ }
+
+ if (Attributes == PrivateData->Attributes) {
+ return EFI_SUCCESS;
+ }
+ //
+ // It is just a trick for some attribute can only be enabled or disabled
+ // otherwise it can impact on other devices
+ //
+ PrivateData->Attributes = Attributes;
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Retrieves the current resource settings of this PCI root bridge in the form of a set of ACPI 2.0
+ resource descriptors.
+
+ @param[in] This A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
+ @param[out] Resources A pointer to the ACPI 2.0 resource descriptors that describe the
+ current configuration of this PCI root bridge. The storage for the
+ ACPI 2.0 resource descriptors is allocated by this function. The
+ caller must treat the return buffer as read-only data, and the buffer
+ must not be freed by the caller.
+
+ @retval EFI_SUCCESS The current configuration of this PCI root bridge was returned in Resources.
+
+**/
+EFI_STATUS
+EFIAPI
+RootBridgeIoConfiguration (
+ IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
+ OUT VOID **Resources
+ )
+{
+ PCI_ROOT_BRIDGE_INSTANCE *PrivateData;
+ UINTN Index;
+
+ PrivateData = DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS (This);
+
+ for (Index = 0; Index < TypeMax; Index++) {
+ if (PrivateData->ResAllocNode[Index].Status == ResAllocated) {
+ Configuration.SpaceDesp[Index].AddrRangeMin = PrivateData->ResAllocNode[Index].Base;
+ Configuration.SpaceDesp[Index].AddrRangeMax = PrivateData->ResAllocNode[Index].Base +
+ PrivateData->ResAllocNode[Index].Length -
+ 1;
+ Configuration.SpaceDesp[Index].AddrLen = PrivateData->ResAllocNode[Index].Length;
+ }
+ }
+ *Resources = &Configuration;
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Internal help function for read and write PCI configuration space.
+
+ @param[in] This A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
+ @param[in] Write Switch value for Read or Write.
+ @param[in] Width Signifies the width of the memory operations.
+ @param[in] UserAddress The address within the PCI configuration space for the PCI controller.
+ @param[in] Count The number of PCI configuration operations to perform. Bytes
+ moved is Width size * Count, starting at Address.
+ @param[in, out] UserBuffer For read operations, the destination buffer to store the results. For
+ write operations, the source buffer to write data from.
+
+ @retval EFI_SUCCESS The data was read from or written to the PCI root bridge.
+ @retval EFI_INVALID_PARAMETER Width is invalid for this PCI root bridge or Buffer is NULL.
+
+**/
+STATIC
+EFI_STATUS
+RootBridgeIoPciRW (
+ IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
+ IN BOOLEAN Write,
+ IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,
+ IN UINT64 UserAddress,
+ IN UINTN Count,
+ IN OUT VOID *UserBuffer
+ )
+{
+ UINT32 InStride;
+ UINT32 OutStride;
+ EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_PCI_ADDRESS *PciRbAddr;
+ UINT8 *PcieRegAddr;
+
+ if ((Width & 0x03) >= EfiPciWidthUint64) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ InStride = 1 << (Width & 0x03);
+ OutStride = InStride;
+ if (Width >= (EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH) EfiCpuIoWidthFifoUint8 && Width <= (EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH) EfiCpuIoWidthFifoUint64) {
+ InStride = 0;
+ }
+
+ if (Width >= (EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH) EfiCpuIoWidthFillUint8 && Width <= (EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH) EfiCpuIoWidthFillUint64) {
+ OutStride = 0;
+ }
+
+ PciRbAddr = (EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_PCI_ADDRESS *) &UserAddress;
+
+ PcieRegAddr = (UINT8 *) MmPciAddress (
+ 0, // No segment support
+ PciRbAddr->Bus,
+ PciRbAddr->Device,
+ PciRbAddr->Function,
+ 0 // Register is added next
+ );
+
+ //
+ // Add the register offset to the address
+ //
+ if (PciRbAddr->ExtendedRegister != 0) {
+ PcieRegAddr += PciRbAddr->ExtendedRegister;
+ } else {
+ PcieRegAddr += PciRbAddr->Register;
+ }
+
+ while (Count) {
+ if (Write) {
+ This->Mem.Write (This, Width, (UINTN) PcieRegAddr, 1, UserBuffer);
+ } else {
+ This->Mem.Read (This, Width, (UINTN) PcieRegAddr, 1, UserBuffer);
+ }
+
+ UserBuffer = ((UINT8 *) UserBuffer) + OutStride;
+ PcieRegAddr += InStride;
+ Count -= 1;
+ }
+
+ return EFI_SUCCESS;
+}
+
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