diff options
Diffstat (limited to 'Core/UefiCpuPkg/CpuIoPei/CpuIoPei.c')
| -rw-r--r-- | Core/UefiCpuPkg/CpuIoPei/CpuIoPei.c | 916 |
1 files changed, 916 insertions, 0 deletions
diff --git a/Core/UefiCpuPkg/CpuIoPei/CpuIoPei.c b/Core/UefiCpuPkg/CpuIoPei/CpuIoPei.c new file mode 100644 index 0000000000..b6d538b166 --- /dev/null +++ b/Core/UefiCpuPkg/CpuIoPei/CpuIoPei.c @@ -0,0 +1,916 @@ +/** @file
+ Produces the CPU I/O PPI.
+
+Copyright (c) 2009 - 2012, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2017, AMD Incorporated. 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 "CpuIoPei.h"
+
+//
+// Instance of CPU I/O PPI
+//
+EFI_PEI_CPU_IO_PPI gCpuIoPpi = {
+ {
+ CpuMemoryServiceRead,
+ CpuMemoryServiceWrite
+ },
+ {
+ CpuIoServiceRead,
+ CpuIoServiceWrite
+ },
+ CpuIoRead8,
+ CpuIoRead16,
+ CpuIoRead32,
+ CpuIoRead64,
+ CpuIoWrite8,
+ CpuIoWrite16,
+ CpuIoWrite32,
+ CpuIoWrite64,
+ CpuMemRead8,
+ CpuMemRead16,
+ CpuMemRead32,
+ CpuMemRead64,
+ CpuMemWrite8,
+ CpuMemWrite16,
+ CpuMemWrite32,
+ CpuMemWrite64
+};
+
+//
+// PPI Descriptor used to install the CPU I/O PPI
+//
+EFI_PEI_PPI_DESCRIPTOR gPpiList = {
+ (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
+ &gEfiPeiCpuIoPpiInstalledGuid,
+ NULL
+};
+
+//
+// Lookup table for increment values based on transfer widths
+//
+UINT8 mInStride[] = {
+ 1, // EfiPeiCpuIoWidthUint8
+ 2, // EfiPeiCpuIoWidthUint16
+ 4, // EfiPeiCpuIoWidthUint32
+ 8, // EfiPeiCpuIoWidthUint64
+ 0, // EfiPeiCpuIoWidthFifoUint8
+ 0, // EfiPeiCpuIoWidthFifoUint16
+ 0, // EfiPeiCpuIoWidthFifoUint32
+ 0, // EfiPeiCpuIoWidthFifoUint64
+ 1, // EfiPeiCpuIoWidthFillUint8
+ 2, // EfiPeiCpuIoWidthFillUint16
+ 4, // EfiPeiCpuIoWidthFillUint32
+ 8 // EfiPeiCpuIoWidthFillUint64
+};
+
+//
+// Lookup table for increment values based on transfer widths
+//
+UINT8 mOutStride[] = {
+ 1, // EfiPeiCpuIoWidthUint8
+ 2, // EfiPeiCpuIoWidthUint16
+ 4, // EfiPeiCpuIoWidthUint32
+ 8, // EfiPeiCpuIoWidthUint64
+ 1, // EfiPeiCpuIoWidthFifoUint8
+ 2, // EfiPeiCpuIoWidthFifoUint16
+ 4, // EfiPeiCpuIoWidthFifoUint32
+ 8, // EfiPeiCpuIoWidthFifoUint64
+ 0, // EfiPeiCpuIoWidthFillUint8
+ 0, // EfiPeiCpuIoWidthFillUint16
+ 0, // EfiPeiCpuIoWidthFillUint32
+ 0 // EfiPeiCpuIoWidthFillUint64
+};
+
+/**
+ Check parameters to a CPU I/O PPI service request.
+
+ @param[in] MmioOperation TRUE for an MMIO operation, FALSE for I/O Port operation.
+ @param[in] Width The width of the access. Enumerated in bytes.
+ @param[in] Address The physical address of the access.
+ @param[in] Count The number of accesses to perform.
+ @param[in] Buffer A pointer to the buffer of data.
+
+ @retval EFI_SUCCESS The parameters for this request pass the checks.
+ @retval EFI_INVALID_PARAMETER Width is invalid for this EFI system.
+ @retval EFI_INVALID_PARAMETER Buffer is NULL.
+ @retval EFI_UNSUPPORTED The address range specified by Address, Width,
+ and Count is not valid for this EFI system.
+
+**/
+EFI_STATUS
+CpuIoCheckParameter (
+ IN BOOLEAN MmioOperation,
+ IN EFI_PEI_CPU_IO_PPI_WIDTH Width,
+ IN UINT64 Address,
+ IN UINTN Count,
+ IN VOID *Buffer
+ )
+{
+ UINT64 MaxCount;
+ UINT64 Limit;
+
+ //
+ // Check to see if Buffer is NULL
+ //
+ if (Buffer == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Check to see if Width is in the valid range
+ //
+ if ((UINT32)Width >= EfiPeiCpuIoWidthMaximum) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // For FIFO type, the target address won't increase during the access,
+ // so treat Count as 1
+ //
+ if (Width >= EfiPeiCpuIoWidthFifoUint8 && Width <= EfiPeiCpuIoWidthFifoUint64) {
+ Count = 1;
+ }
+
+ //
+ // Check to see if Width is in the valid range for I/O Port operations
+ //
+ Width = (EFI_PEI_CPU_IO_PPI_WIDTH) (Width & 0x03);
+ if (!MmioOperation && (Width == EfiPeiCpuIoWidthUint64)) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Check to see if any address associated with this transfer exceeds the maximum
+ // allowed address. The maximum address implied by the parameters passed in is
+ // Address + Size * Count. If the following condition is met, then the transfer
+ // is not supported.
+ //
+ // Address + Size * Count > (MmioOperation ? MAX_ADDRESS : MAX_IO_PORT_ADDRESS) + 1
+ //
+ // Since MAX_ADDRESS can be the maximum integer value supported by the CPU and Count
+ // can also be the maximum integer value supported by the CPU, this range
+ // check must be adjusted to avoid all overflow conditions.
+ //
+ // The following form of the range check is equivalent but assumes that
+ // MAX_ADDRESS and MAX_IO_PORT_ADDRESS are of the form (2^n - 1).
+ //
+ Limit = (MmioOperation ? MAX_ADDRESS : MAX_IO_PORT_ADDRESS);
+ if (Count == 0) {
+ if (Address > Limit) {
+ return EFI_UNSUPPORTED;
+ }
+ } else {
+ MaxCount = RShiftU64 (Limit, Width);
+ if (MaxCount < (Count - 1)) {
+ return EFI_UNSUPPORTED;
+ }
+ if (Address > LShiftU64 (MaxCount - Count + 1, Width)) {
+ return EFI_UNSUPPORTED;
+ }
+ }
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Reads memory-mapped registers.
+
+ @param[in] PeiServices An indirect pointer to the PEI Services Table
+ published by the PEI Foundation.
+ @param[in] This Pointer to local data for the interface.
+ @param[in] Width The width of the access. Enumerated in bytes.
+ @param[in] Address The physical address of the access.
+ @param[in] Count The number of accesses to perform.
+ @param[out] Buffer A pointer to the buffer of data.
+
+ @retval EFI_SUCCESS The function completed successfully.
+ @retval EFI_INVALID_PARAMETER Width is invalid for this EFI system.
+ @retval EFI_INVALID_PARAMETER Buffer is NULL.
+ @retval EFI_UNSUPPORTED The address range specified by Address, Width,
+ and Count is not valid for this EFI system.
+
+**/
+EFI_STATUS
+EFIAPI
+CpuMemoryServiceRead (
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN CONST EFI_PEI_CPU_IO_PPI *This,
+ IN EFI_PEI_CPU_IO_PPI_WIDTH Width,
+ IN UINT64 Address,
+ IN UINTN Count,
+ OUT VOID *Buffer
+ )
+{
+ EFI_STATUS Status;
+ UINT8 InStride;
+ UINT8 OutStride;
+ EFI_PEI_CPU_IO_PPI_WIDTH OperationWidth;
+ BOOLEAN Aligned;
+ UINT8 *Uint8Buffer;
+
+ Status = CpuIoCheckParameter (TRUE, Width, Address, Count, Buffer);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Select loop based on the width of the transfer
+ //
+ InStride = mInStride[Width];
+ OutStride = mOutStride[Width];
+ OperationWidth = (EFI_PEI_CPU_IO_PPI_WIDTH) (Width & 0x03);
+ Aligned = (BOOLEAN)(((UINTN)Buffer & (mInStride[OperationWidth] - 1)) == 0x00);
+ for (Uint8Buffer = Buffer; Count > 0; Address += InStride, Uint8Buffer += OutStride, Count--) {
+ if (OperationWidth == EfiPeiCpuIoWidthUint8) {
+ *Uint8Buffer = MmioRead8 ((UINTN)Address);
+ } else if (OperationWidth == EfiPeiCpuIoWidthUint16) {
+ if (Aligned) {
+ *((UINT16 *)Uint8Buffer) = MmioRead16 ((UINTN)Address);
+ } else {
+ WriteUnaligned16 ((UINT16 *)Uint8Buffer, MmioRead16 ((UINTN)Address));
+ }
+ } else if (OperationWidth == EfiPeiCpuIoWidthUint32) {
+ if (Aligned) {
+ *((UINT32 *)Uint8Buffer) = MmioRead32 ((UINTN)Address);
+ } else {
+ WriteUnaligned32 ((UINT32 *)Uint8Buffer, MmioRead32 ((UINTN)Address));
+ }
+ } else if (OperationWidth == EfiPeiCpuIoWidthUint64) {
+ if (Aligned) {
+ *((UINT64 *)Uint8Buffer) = MmioRead64 ((UINTN)Address);
+ } else {
+ WriteUnaligned64 ((UINT64 *)Uint8Buffer, MmioRead64 ((UINTN)Address));
+ }
+ }
+ }
+ return EFI_SUCCESS;
+}
+
+/**
+ Writes memory-mapped registers.
+
+ @param[in] PeiServices An indirect pointer to the PEI Services Table
+ published by the PEI Foundation.
+ @param[in] This Pointer to local data for the interface.
+ @param[in] Width The width of the access. Enumerated in bytes.
+ @param[in] Address The physical address of the access.
+ @param[in] Count The number of accesses to perform.
+ @param[in] Buffer A pointer to the buffer of data.
+
+ @retval EFI_SUCCESS The function completed successfully.
+ @retval EFI_INVALID_PARAMETER Width is invalid for this EFI system.
+ @retval EFI_INVALID_PARAMETER Buffer is NULL.
+ @retval EFI_UNSUPPORTED The address range specified by Address, Width,
+ and Count is not valid for this EFI system.
+
+**/
+EFI_STATUS
+EFIAPI
+CpuMemoryServiceWrite (
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN CONST EFI_PEI_CPU_IO_PPI *This,
+ IN EFI_PEI_CPU_IO_PPI_WIDTH Width,
+ IN UINT64 Address,
+ IN UINTN Count,
+ IN VOID *Buffer
+ )
+{
+ EFI_STATUS Status;
+ UINT8 InStride;
+ UINT8 OutStride;
+ EFI_PEI_CPU_IO_PPI_WIDTH OperationWidth;
+ BOOLEAN Aligned;
+ UINT8 *Uint8Buffer;
+
+ Status = CpuIoCheckParameter (TRUE, Width, Address, Count, Buffer);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Select loop based on the width of the transfer
+ //
+ InStride = mInStride[Width];
+ OutStride = mOutStride[Width];
+ OperationWidth = (EFI_PEI_CPU_IO_PPI_WIDTH) (Width & 0x03);
+ Aligned = (BOOLEAN)(((UINTN)Buffer & (mInStride[OperationWidth] - 1)) == 0x00);
+ for (Uint8Buffer = Buffer; Count > 0; Address += InStride, Uint8Buffer += OutStride, Count--) {
+ if (OperationWidth == EfiPeiCpuIoWidthUint8) {
+ MmioWrite8 ((UINTN)Address, *Uint8Buffer);
+ } else if (OperationWidth == EfiPeiCpuIoWidthUint16) {
+ if (Aligned) {
+ MmioWrite16 ((UINTN)Address, *((UINT16 *)Uint8Buffer));
+ } else {
+ MmioWrite16 ((UINTN)Address, ReadUnaligned16 ((UINT16 *)Uint8Buffer));
+ }
+ } else if (OperationWidth == EfiPeiCpuIoWidthUint32) {
+ if (Aligned) {
+ MmioWrite32 ((UINTN)Address, *((UINT32 *)Uint8Buffer));
+ } else {
+ MmioWrite32 ((UINTN)Address, ReadUnaligned32 ((UINT32 *)Uint8Buffer));
+ }
+ } else if (OperationWidth == EfiPeiCpuIoWidthUint64) {
+ if (Aligned) {
+ MmioWrite64 ((UINTN)Address, *((UINT64 *)Uint8Buffer));
+ } else {
+ MmioWrite64 ((UINTN)Address, ReadUnaligned64 ((UINT64 *)Uint8Buffer));
+ }
+ }
+ }
+ return EFI_SUCCESS;
+}
+
+/**
+ Reads I/O registers.
+
+ @param[in] PeiServices An indirect pointer to the PEI Services Table
+ published by the PEI Foundation.
+ @param[in] This Pointer to local data for the interface.
+ @param[in] Width The width of the access. Enumerated in bytes.
+ @param[in] Address The physical address of the access.
+ @param[in] Count The number of accesses to perform.
+ @param[out] Buffer A pointer to the buffer of data.
+
+ @retval EFI_SUCCESS The function completed successfully.
+ @retval EFI_INVALID_PARAMETER Width is invalid for this EFI system.
+ @retval EFI_INVALID_PARAMETER Buffer is NULL.
+ @retval EFI_UNSUPPORTED The address range specified by Address, Width,
+ and Count is not valid for this EFI system.
+
+**/
+EFI_STATUS
+EFIAPI
+CpuIoServiceRead (
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN CONST EFI_PEI_CPU_IO_PPI *This,
+ IN EFI_PEI_CPU_IO_PPI_WIDTH Width,
+ IN UINT64 Address,
+ IN UINTN Count,
+ OUT VOID *Buffer
+ )
+{
+ EFI_STATUS Status;
+ UINT8 InStride;
+ UINT8 OutStride;
+ EFI_PEI_CPU_IO_PPI_WIDTH OperationWidth;
+ BOOLEAN Aligned;
+ UINT8 *Uint8Buffer;
+
+ Status = CpuIoCheckParameter (FALSE, Width, Address, Count, Buffer);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Select loop based on the width of the transfer
+ //
+ InStride = mInStride[Width];
+ OutStride = mOutStride[Width];
+ OperationWidth = (EFI_PEI_CPU_IO_PPI_WIDTH) (Width & 0x03);
+
+ //
+ // Fifo operations supported for (mInStride[Width] == 0)
+ //
+ if (InStride == 0) {
+ switch (OperationWidth) {
+ case EfiPeiCpuIoWidthUint8:
+ IoReadFifo8 ((UINTN)Address, Count, Buffer);
+ return EFI_SUCCESS;
+ case EfiPeiCpuIoWidthUint16:
+ IoReadFifo16 ((UINTN)Address, Count, Buffer);
+ return EFI_SUCCESS;
+ case EfiPeiCpuIoWidthUint32:
+ IoReadFifo32 ((UINTN)Address, Count, Buffer);
+ return EFI_SUCCESS;
+ default:
+ //
+ // The CpuIoCheckParameter call above will ensure that this
+ // path is not taken.
+ //
+ ASSERT (FALSE);
+ break;
+ }
+ }
+
+ Aligned = (BOOLEAN)(((UINTN)Buffer & (mInStride[OperationWidth] - 1)) == 0x00);
+ for (Uint8Buffer = Buffer; Count > 0; Address += InStride, Uint8Buffer += OutStride, Count--) {
+ if (OperationWidth == EfiPeiCpuIoWidthUint8) {
+ *Uint8Buffer = IoRead8 ((UINTN)Address);
+ } else if (OperationWidth == EfiPeiCpuIoWidthUint16) {
+ if (Aligned) {
+ *((UINT16 *)Uint8Buffer) = IoRead16 ((UINTN)Address);
+ } else {
+ WriteUnaligned16 ((UINT16 *)Uint8Buffer, IoRead16 ((UINTN)Address));
+ }
+ } else if (OperationWidth == EfiPeiCpuIoWidthUint32) {
+ if (Aligned) {
+ *((UINT32 *)Uint8Buffer) = IoRead32 ((UINTN)Address);
+ } else {
+ WriteUnaligned32 ((UINT32 *)Uint8Buffer, IoRead32 ((UINTN)Address));
+ }
+ }
+ }
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Write I/O registers.
+
+ @param[in] PeiServices An indirect pointer to the PEI Services Table
+ published by the PEI Foundation.
+ @param[in] This Pointer to local data for the interface.
+ @param[in] Width The width of the access. Enumerated in bytes.
+ @param[in] Address The physical address of the access.
+ @param[in] Count The number of accesses to perform.
+ @param[in] Buffer A pointer to the buffer of data.
+
+ @retval EFI_SUCCESS The function completed successfully.
+ @retval EFI_INVALID_PARAMETER Width is invalid for this EFI system.
+ @retval EFI_INVALID_PARAMETER Buffer is NULL.
+ @retval EFI_UNSUPPORTED The address range specified by Address, Width,
+ and Count is not valid for this EFI system.
+
+**/
+EFI_STATUS
+EFIAPI
+CpuIoServiceWrite (
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN CONST EFI_PEI_CPU_IO_PPI *This,
+ IN EFI_PEI_CPU_IO_PPI_WIDTH Width,
+ IN UINT64 Address,
+ IN UINTN Count,
+ IN VOID *Buffer
+ )
+{
+ EFI_STATUS Status;
+ UINT8 InStride;
+ UINT8 OutStride;
+ EFI_PEI_CPU_IO_PPI_WIDTH OperationWidth;
+ BOOLEAN Aligned;
+ UINT8 *Uint8Buffer;
+
+ //
+ // Make sure the parameters are valid
+ //
+ Status = CpuIoCheckParameter (FALSE, Width, Address, Count, Buffer);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Select loop based on the width of the transfer
+ //
+ InStride = mInStride[Width];
+ OutStride = mOutStride[Width];
+ OperationWidth = (EFI_PEI_CPU_IO_PPI_WIDTH) (Width & 0x03);
+
+ //
+ // Fifo operations supported for (mInStride[Width] == 0)
+ //
+ if (InStride == 0) {
+ switch (OperationWidth) {
+ case EfiPeiCpuIoWidthUint8:
+ IoWriteFifo8 ((UINTN)Address, Count, Buffer);
+ return EFI_SUCCESS;
+ case EfiPeiCpuIoWidthUint16:
+ IoWriteFifo16 ((UINTN)Address, Count, Buffer);
+ return EFI_SUCCESS;
+ case EfiPeiCpuIoWidthUint32:
+ IoWriteFifo32 ((UINTN)Address, Count, Buffer);
+ return EFI_SUCCESS;
+ default:
+ //
+ // The CpuIoCheckParameter call above will ensure that this
+ // path is not taken.
+ //
+ ASSERT (FALSE);
+ break;
+ }
+ }
+
+ Aligned = (BOOLEAN)(((UINTN)Buffer & (mInStride[OperationWidth] - 1)) == 0x00);
+ for (Uint8Buffer = (UINT8 *)Buffer; Count > 0; Address += InStride, Uint8Buffer += OutStride, Count--) {
+ if (OperationWidth == EfiPeiCpuIoWidthUint8) {
+ IoWrite8 ((UINTN)Address, *Uint8Buffer);
+ } else if (OperationWidth == EfiPeiCpuIoWidthUint16) {
+ if (Aligned) {
+ IoWrite16 ((UINTN)Address, *((UINT16 *)Uint8Buffer));
+ } else {
+ IoWrite16 ((UINTN)Address, ReadUnaligned16 ((UINT16 *)Uint8Buffer));
+ }
+ } else if (OperationWidth == EfiPeiCpuIoWidthUint32) {
+ if (Aligned) {
+ IoWrite32 ((UINTN)Address, *((UINT32 *)Uint8Buffer));
+ } else {
+ IoWrite32 ((UINTN)Address, ReadUnaligned32 ((UINT32 *)Uint8Buffer));
+ }
+ }
+ }
+
+ return EFI_SUCCESS;
+}
+
+/**
+ 8-bit I/O read operations.
+
+ @param[in] PeiServices An indirect pointer to the PEI Services Table published
+ by the PEI Foundation.
+ @param[in] This Pointer to local data for the interface.
+ @param[in] Address The physical address of the access.
+
+ @return An 8-bit value returned from the I/O space.
+**/
+UINT8
+EFIAPI
+CpuIoRead8 (
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN CONST EFI_PEI_CPU_IO_PPI *This,
+ IN UINT64 Address
+ )
+{
+ return IoRead8 ((UINTN)Address);
+}
+
+/**
+ 16-bit I/O read operations.
+
+ @param[in] PeiServices An indirect pointer to the PEI Services Table published
+ by the PEI Foundation.
+ @param[in] This Pointer to local data for the interface.
+ @param[in] Address The physical address of the access.
+
+ @return A 16-bit value returned from the I/O space.
+
+**/
+UINT16
+EFIAPI
+CpuIoRead16 (
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN CONST EFI_PEI_CPU_IO_PPI *This,
+ IN UINT64 Address
+ )
+{
+ return IoRead16 ((UINTN)Address);
+}
+
+/**
+ 32-bit I/O read operations.
+
+ @param[in] PeiServices An indirect pointer to the PEI Services Table published
+ by the PEI Foundation.
+ @param[in] This Pointer to local data for the interface.
+ @param[in] Address The physical address of the access.
+
+ @return A 32-bit value returned from the I/O space.
+
+**/
+UINT32
+EFIAPI
+CpuIoRead32 (
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN CONST EFI_PEI_CPU_IO_PPI *This,
+ IN UINT64 Address
+ )
+{
+ return IoRead32 ((UINTN)Address);
+}
+
+/**
+ 64-bit I/O read operations.
+
+ @param[in] PeiServices An indirect pointer to the PEI Services Table published
+ by the PEI Foundation.
+ @param[in] This Pointer to local data for the interface.
+ @param[in] Address The physical address of the access.
+
+ @return A 64-bit value returned from the I/O space.
+
+**/
+UINT64
+EFIAPI
+CpuIoRead64 (
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN CONST EFI_PEI_CPU_IO_PPI *This,
+ IN UINT64 Address
+ )
+{
+ return IoRead64 ((UINTN)Address);
+}
+
+/**
+ 8-bit I/O write operations.
+
+ @param[in] PeiServices An indirect pointer to the PEI Services Table published
+ by the PEI Foundation.
+ @param[in] This Pointer to local data for the interface.
+ @param[in] Address The physical address of the access.
+ @param[in] Data The data to write.
+
+**/
+VOID
+EFIAPI
+CpuIoWrite8 (
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN CONST EFI_PEI_CPU_IO_PPI *This,
+ IN UINT64 Address,
+ IN UINT8 Data
+ )
+{
+ IoWrite8 ((UINTN)Address, Data);
+}
+
+/**
+ 16-bit I/O write operations.
+
+ @param[in] PeiServices An indirect pointer to the PEI Services Table published
+ by the PEI Foundation.
+ @param[in] This Pointer to local data for the interface.
+ @param[in] Address The physical address of the access.
+ @param[in] Data The data to write.
+
+**/
+VOID
+EFIAPI
+CpuIoWrite16 (
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN CONST EFI_PEI_CPU_IO_PPI *This,
+ IN UINT64 Address,
+ IN UINT16 Data
+ )
+{
+ IoWrite16 ((UINTN)Address, Data);
+}
+
+/**
+ 32-bit I/O write operations.
+
+ @param[in] PeiServices An indirect pointer to the PEI Services Table published
+ by the PEI Foundation.
+ @param[in] This Pointer to local data for the interface.
+ @param[in] Address The physical address of the access.
+ @param[in] Data The data to write.
+
+**/
+VOID
+EFIAPI
+CpuIoWrite32 (
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN CONST EFI_PEI_CPU_IO_PPI *This,
+ IN UINT64 Address,
+ IN UINT32 Data
+ )
+{
+ IoWrite32 ((UINTN)Address, Data);
+}
+
+/**
+ 64-bit I/O write operations.
+
+ @param[in] PeiServices An indirect pointer to the PEI Services Table published
+ by the PEI Foundation.
+ @param[in] This Pointer to local data for the interface.
+ @param[in] Address The physical address of the access.
+ @param[in] Data The data to write.
+
+**/
+VOID
+EFIAPI
+CpuIoWrite64 (
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN CONST EFI_PEI_CPU_IO_PPI *This,
+ IN UINT64 Address,
+ IN UINT64 Data
+ )
+{
+ IoWrite64 ((UINTN)Address, Data);
+}
+
+/**
+ 8-bit memory read operations.
+
+ @param[in] PeiServices An indirect pointer to the PEI Services Table published
+ by the PEI Foundation.
+ @param[in] This Pointer to local data for the interface.
+ @param[in] Address The physical address of the access.
+
+ @return An 8-bit value returned from the memory space.
+
+**/
+UINT8
+EFIAPI
+CpuMemRead8 (
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN CONST EFI_PEI_CPU_IO_PPI *This,
+ IN UINT64 Address
+ )
+{
+ return MmioRead8 ((UINTN)Address);
+}
+
+/**
+ 16-bit memory read operations.
+
+ @param[in] PeiServices An indirect pointer to the PEI Services Table published
+ by the PEI Foundation.
+ @param[in] This Pointer to local data for the interface.
+ @param[in] Address The physical address of the access.
+
+ @return A 16-bit value returned from the memory space.
+
+**/
+UINT16
+EFIAPI
+CpuMemRead16 (
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN CONST EFI_PEI_CPU_IO_PPI *This,
+ IN UINT64 Address
+ )
+{
+ return MmioRead16 ((UINTN)Address);
+}
+
+/**
+ 32-bit memory read operations.
+
+ @param[in] PeiServices An indirect pointer to the PEI Services Table published
+ by the PEI Foundation.
+ @param[in] This Pointer to local data for the interface.
+ @param[in] Address The physical address of the access.
+
+ @return A 32-bit value returned from the memory space.
+
+**/
+UINT32
+EFIAPI
+CpuMemRead32 (
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN CONST EFI_PEI_CPU_IO_PPI *This,
+ IN UINT64 Address
+ )
+{
+ return MmioRead32 ((UINTN)Address);
+}
+
+/**
+ 64-bit memory read operations.
+
+ @param[in] PeiServices An indirect pointer to the PEI Services Table published
+ by the PEI Foundation.
+ @param[in] This Pointer to local data for the interface.
+ @param[in] Address The physical address of the access.
+
+ @return A 64-bit value returned from the memory space.
+
+**/
+UINT64
+EFIAPI
+CpuMemRead64 (
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN CONST EFI_PEI_CPU_IO_PPI *This,
+ IN UINT64 Address
+ )
+{
+ return MmioRead64 ((UINTN)Address);
+}
+
+/**
+ 8-bit memory write operations.
+
+ @param[in] PeiServices An indirect pointer to the PEI Services Table published
+ by the PEI Foundation.
+ @param[in] This Pointer to local data for the interface.
+ @param[in] Address The physical address of the access.
+ @param[in] Data The data to write.
+
+**/
+VOID
+EFIAPI
+CpuMemWrite8 (
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN CONST EFI_PEI_CPU_IO_PPI *This,
+ IN UINT64 Address,
+ IN UINT8 Data
+ )
+{
+ MmioWrite8 ((UINTN)Address, Data);
+}
+
+/**
+ 16-bit memory write operations.
+
+ @param[in] PeiServices An indirect pointer to the PEI Services Table published
+ by the PEI Foundation.
+ @param[in] This Pointer to local data for the interface.
+ @param[in] Address The physical address of the access.
+ @param[in] Data The data to write.
+
+**/
+VOID
+EFIAPI
+CpuMemWrite16 (
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN CONST EFI_PEI_CPU_IO_PPI *This,
+ IN UINT64 Address,
+ IN UINT16 Data
+ )
+{
+ MmioWrite16 ((UINTN)Address, Data);
+}
+
+/**
+ 32-bit memory write operations.
+
+ @param[in] PeiServices An indirect pointer to the PEI Services Table published
+ by the PEI Foundation.
+ @param[in] This Pointer to local data for the interface.
+ @param[in] Address The physical address of the access.
+ @param[in] Data The data to write.
+
+**/
+VOID
+EFIAPI
+CpuMemWrite32 (
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN CONST EFI_PEI_CPU_IO_PPI *This,
+ IN UINT64 Address,
+ IN UINT32 Data
+ )
+{
+ MmioWrite32 ((UINTN)Address, Data);
+}
+
+/**
+ 64-bit memory write operations.
+
+ @param[in] PeiServices An indirect pointer to the PEI Services Table published
+ by the PEI Foundation.
+ @param[in] This Pointer to local data for the interface.
+ @param[in] Address The physical address of the access.
+ @param[in] Data The data to write.
+
+**/
+VOID
+EFIAPI
+CpuMemWrite64 (
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN CONST EFI_PEI_CPU_IO_PPI *This,
+ IN UINT64 Address,
+ IN UINT64 Data
+ )
+{
+ MmioWrite64 ((UINTN)Address, Data);
+}
+
+/**
+ The Entry point of the CPU I/O PEIM
+
+ This function is the Entry point of the CPU I/O PEIM which installs CpuIoPpi.
+
+ @param[in] FileHandle Pointer to image file handle.
+ @param[in] PeiServices Pointer to PEI Services Table
+
+ @retval EFI_SUCCESS CPU I/O PPI successfully installed
+
+**/
+EFI_STATUS
+EFIAPI
+CpuIoInitialize (
+ IN EFI_PEI_FILE_HANDLE FileHandle,
+ IN CONST EFI_PEI_SERVICES **PeiServices
+ )
+{
+ EFI_STATUS Status;
+
+ //
+ // Register so it will be automatically shadowed to memory
+ //
+ Status = PeiServicesRegisterForShadow (FileHandle);
+
+ //
+ // Make CpuIo pointer in PeiService table point to gCpuIoPpi
+ //
+ (*((EFI_PEI_SERVICES **)PeiServices))->CpuIo = &gCpuIoPpi;
+
+ if (Status == EFI_ALREADY_STARTED) {
+ //
+ // Shadow completed and running from memory
+ //
+ DEBUG ((EFI_D_INFO, "CpuIO PPI has been loaded into memory. Reinstalled PPI=0x%x\n", &gCpuIoPpi));
+ } else {
+ Status = PeiServicesInstallPpi (&gPpiList);
+ ASSERT_EFI_ERROR (Status);
+ }
+
+ return EFI_SUCCESS;
+}
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