diff options
Diffstat (limited to 'UefiCpuPkg/CpuIo2Smm')
| -rw-r--r-- | UefiCpuPkg/CpuIo2Smm/CpuIo2Smm.c | 442 | ||||
| -rw-r--r-- | UefiCpuPkg/CpuIo2Smm/CpuIo2Smm.inf | 51 |
2 files changed, 493 insertions, 0 deletions
diff --git a/UefiCpuPkg/CpuIo2Smm/CpuIo2Smm.c b/UefiCpuPkg/CpuIo2Smm/CpuIo2Smm.c new file mode 100644 index 0000000000..da470a044a --- /dev/null +++ b/UefiCpuPkg/CpuIo2Smm/CpuIo2Smm.c @@ -0,0 +1,442 @@ +/** @file
+ Produces the SMM CPU I/O Protocol.
+
+Copyright (c) 2009 - 2010, Intel Corporation
+All rights reserved. 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 <PiSmm.h>
+
+#include <Protocol/SmmCpuIo2.h>
+
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/IoLib.h>
+#include <Library/SmmServicesTableLib.h>
+#include <Library/BaseMemoryLib.h>
+
+#define MAX_IO_PORT_ADDRESS 0xFFFF
+
+//
+// Function Prototypes
+//
+EFI_STATUS
+EFIAPI
+CpuMemoryServiceRead (
+ IN CONST EFI_SMM_CPU_IO2_PROTOCOL *This,
+ IN EFI_SMM_IO_WIDTH Width,
+ IN UINT64 Address,
+ IN UINTN Count,
+ OUT VOID *Buffer
+ );
+
+EFI_STATUS
+EFIAPI
+CpuMemoryServiceWrite (
+ IN CONST EFI_SMM_CPU_IO2_PROTOCOL *This,
+ IN EFI_SMM_IO_WIDTH Width,
+ IN UINT64 Address,
+ IN UINTN Count,
+ IN VOID *Buffer
+ );
+
+EFI_STATUS
+EFIAPI
+CpuIoServiceRead (
+ IN CONST EFI_SMM_CPU_IO2_PROTOCOL *This,
+ IN EFI_SMM_IO_WIDTH Width,
+ IN UINT64 Address,
+ IN UINTN Count,
+ OUT VOID *Buffer
+ );
+
+EFI_STATUS
+EFIAPI
+CpuIoServiceWrite (
+ IN CONST EFI_SMM_CPU_IO2_PROTOCOL *This,
+ IN EFI_SMM_IO_WIDTH Width,
+ IN UINT64 Address,
+ IN UINTN Count,
+ IN VOID *Buffer
+ );
+
+//
+// Handle for the SMM CPU I/O Protocol
+//
+EFI_HANDLE mHandle = NULL;
+
+//
+// SMM CPU I/O Protocol instance
+//
+EFI_SMM_CPU_IO2_PROTOCOL mSmmCpuIo2 = {
+ {
+ CpuMemoryServiceRead,
+ CpuMemoryServiceWrite
+ },
+ {
+ CpuIoServiceRead,
+ CpuIoServiceWrite
+ }
+};
+
+//
+// Lookup table for increment values based on transfer widths
+//
+UINT8 mStride[] = {
+ 1, // SMM_IO_UINT8
+ 2, // SMM_IO_UINT16
+ 4, // SMM_IO_UINT32
+ 8 // SMM_IO_UINT64
+};
+
+/**
+ Check parameters to a SMM CPU I/O Protocol service request.
+
+ @param Width Signifies the width of the I/O or Memory operation.
+ @param Address The base address of the I/O or Memory operation.
+ @param Count The number of I/O or Memory operations to perform.
+ The number of bytes moved is Width size * Count, starting at Address.
+ @param Buffer For read operations, the destination buffer to store the results.
+ For write operations, the source buffer from which to write data.
+ @param MmioOperation TRUE for an MMIO operation, FALSE for I/O Port operation.
+
+ @retval EFI_SUCCESS The parameters for this request pass the checks.
+ @retval EFI_INVALID_PARAMETER Buffer is NULL or Width is not valid.
+ @retval EFI_UNSUPPORTED The address range specified by Address, Width, and Count exceeds Limit.
+ The Buffer is not aligned for the given Width.
+
+**/
+EFI_STATUS
+CpuIoCheckParameter (
+ IN BOOLEAN MmioOperation,
+ IN EFI_SMM_IO_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 (Width > SMM_IO_UINT64) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Check to see if Width is in the valid range for I/O Port operations
+ //
+ if (!MmioOperation && (Width == SMM_IO_UINT64)) {
+ 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 oveflow conditions.
+ //
+ // The follwing 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;
+ }
+ }
+
+ //
+ // Check to see if Address is aligned
+ //
+ if ((Address & (UINT64)(mStride[Width] - 1)) != 0) {
+ return EFI_UNSUPPORTED;
+ }
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Reads memory-mapped registers.
+
+ @param This A pointer to the EFI_SMM_CPU_IO2_PROTOCOL instance.
+ @param Width Signifies the width of the I/O or Memory operation.
+ @param Address The base address of the I/O or Memoryoperation.
+ @param Count The number of I/O or Memory operations to perform.
+ The number of bytes moved is Width size * Count, starting at Address.
+ @param Buffer For read operations, the destination buffer to store the results.
+ For write operations, the source buffer from which to write data.
+
+ @retval EFI_SUCCESS The data was read from or written to the EFI system.
+ @retval EFI_INVALID_PARAMETER Width is invalid for this EFI system.Or Buffer is NULL.
+ @retval EFI_UNSUPPORTED The Buffer is not aligned for the given Width.
+ Or,The address range specified by Address, Width, and Count is not valid for this EFI system.
+
+**/
+EFI_STATUS
+EFIAPI
+CpuMemoryServiceRead (
+ IN CONST EFI_SMM_CPU_IO2_PROTOCOL *This,
+ IN EFI_SMM_IO_WIDTH Width,
+ IN UINT64 Address,
+ IN UINTN Count,
+ OUT VOID *Buffer
+ )
+{
+ EFI_STATUS Status;
+ UINT8 Stride;
+ UINT8 *Uint8Buffer;
+
+ Status = CpuIoCheckParameter (TRUE, Width, Address, Count, Buffer);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Select loop based on the width of the transfer
+ //
+ Stride = mStride[Width];
+ for (Uint8Buffer = Buffer; Count > 0; Address += Stride, Uint8Buffer += Stride, Count--) {
+ if (Width == SMM_IO_UINT8) {
+ *Uint8Buffer = MmioRead8 ((UINTN)Address);
+ } else if (Width == SMM_IO_UINT16) {
+ *((UINT16 *)Uint8Buffer) = MmioRead16 ((UINTN)Address);
+ } else if (Width == SMM_IO_UINT32) {
+ *((UINT32 *)Uint8Buffer) = MmioRead32 ((UINTN)Address);
+ } else if (Width == SMM_IO_UINT64) {
+ *((UINT64 *)Uint8Buffer) = MmioRead64 ((UINTN)Address);
+ }
+ }
+ return EFI_SUCCESS;
+}
+
+/**
+ Writes memory-mapped registers.
+
+ @param This A pointer to the EFI_SMM_CPU_IO2_PROTOCOL instance.
+ @param Width Signifies the width of the I/O or Memory operation.
+ @param Address The base address of the I/O or Memoryoperation.
+ @param Count The number of I/O or Memory operations to perform.
+ The number of bytes moved is Width size * Count, starting at Address.
+ @param Buffer For read operations, the destination buffer to store the results.
+ For write operations, the source buffer from which to write data.
+
+ @retval EFI_SUCCESS The data was read from or written to the EFI system.
+ @retval EFI_INVALID_PARAMETER Width is invalid for this EFI system.Or Buffer is NULL.
+ @retval EFI_UNSUPPORTED The Buffer is not aligned for the given Width.
+ Or,The address range specified by Address, Width, and Count is not valid for this EFI system.
+
+**/
+EFI_STATUS
+EFIAPI
+CpuMemoryServiceWrite (
+ IN CONST EFI_SMM_CPU_IO2_PROTOCOL *This,
+ IN EFI_SMM_IO_WIDTH Width,
+ IN UINT64 Address,
+ IN UINTN Count,
+ IN VOID *Buffer
+ )
+{
+ EFI_STATUS Status;
+ UINT8 Stride;
+ UINT8 *Uint8Buffer;
+
+ Status = CpuIoCheckParameter (TRUE, Width, Address, Count, Buffer);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Select loop based on the width of the transfer
+ //
+ Stride = mStride[Width];
+ for (Uint8Buffer = Buffer; Count > 0; Address += Stride, Uint8Buffer += Stride, Count--) {
+ if (Width == SMM_IO_UINT8) {
+ MmioWrite8 ((UINTN)Address, *Uint8Buffer);
+ } else if (Width == SMM_IO_UINT16) {
+ MmioWrite16 ((UINTN)Address, *((UINT16 *)Uint8Buffer));
+ } else if (Width == SMM_IO_UINT32) {
+ MmioWrite32 ((UINTN)Address, *((UINT32 *)Uint8Buffer));
+ } else if (Width == SMM_IO_UINT64) {
+ MmioWrite64 ((UINTN)Address, *((UINT64 *)Uint8Buffer));
+ }
+ }
+ return EFI_SUCCESS;
+}
+
+/**
+ Reads I/O registers.
+
+ @param This A pointer to the EFI_SMM_CPU_IO2_PROTOCOL instance.
+ @param Width Signifies the width of the I/O or Memory operation.
+ @param Address The base address of the I/O or Memoryoperation.
+ @param Count The number of I/O or Memory operations to perform.
+ The number of bytes moved is Width size * Count, starting at Address.
+ @param Buffer For read operations, the destination buffer to store the results.
+ For write operations, the source buffer from which to write data.
+
+ @retval EFI_SUCCESS The data was read from or written to the EFI system.
+ @retval EFI_INVALID_PARAMETER Width is invalid for this EFI system.Or Buffer is NULL.
+ @retval EFI_UNSUPPORTED The Buffer is not aligned for the given Width.
+ Or,The address range specified by Address, Width, and Count is not valid for this EFI system.
+
+**/
+EFI_STATUS
+EFIAPI
+CpuIoServiceRead (
+ IN CONST EFI_SMM_CPU_IO2_PROTOCOL *This,
+ IN EFI_SMM_IO_WIDTH Width,
+ IN UINT64 Address,
+ IN UINTN Count,
+ OUT VOID *Buffer
+ )
+{
+ EFI_STATUS Status;
+ UINT8 Stride;
+ UINT8 *Uint8Buffer;
+
+ Status = CpuIoCheckParameter (FALSE, Width, Address, Count, Buffer);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Select loop based on the width of the transfer
+ //
+ Stride = mStride[Width];
+ for (Uint8Buffer = Buffer; Count > 0; Address += Stride, Uint8Buffer += Stride, Count--) {
+ if (Width == SMM_IO_UINT8) {
+ *Uint8Buffer = IoRead8 ((UINTN)Address);
+ } else if (Width == SMM_IO_UINT16) {
+ *((UINT16 *)Uint8Buffer) = IoRead16 ((UINTN)Address);
+ } else if (Width == SMM_IO_UINT32) {
+ *((UINT32 *)Uint8Buffer) = IoRead32 ((UINTN)Address);
+ }
+ }
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Write I/O registers.
+
+ @param This A pointer to the EFI_SMM_CPU_IO2_PROTOCOL instance.
+ @param Width Signifies the width of the I/O or Memory operation.
+ @param Address The base address of the I/O or Memoryoperation.
+ @param Count The number of I/O or Memory operations to perform.
+ The number of bytes moved is Width size * Count, starting at Address.
+ @param Buffer For read operations, the destination buffer to store the results.
+ For write operations, the source buffer from which to write data.
+
+ @retval EFI_SUCCESS The data was read from or written to the EFI system.
+ @retval EFI_INVALID_PARAMETER Width is invalid for this EFI system.Or Buffer is NULL.
+ @retval EFI_UNSUPPORTED The Buffer is not aligned for the given Width.
+ Or,The address range specified by Address, Width, and Count is not valid for this EFI system.
+
+**/
+EFI_STATUS
+EFIAPI
+CpuIoServiceWrite (
+ IN CONST EFI_SMM_CPU_IO2_PROTOCOL *This,
+ IN EFI_SMM_IO_WIDTH Width,
+ IN UINT64 Address,
+ IN UINTN Count,
+ IN VOID *Buffer
+ )
+{
+ EFI_STATUS Status;
+ UINT8 Stride;
+ 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
+ //
+ Stride = mStride[Width];
+ for (Uint8Buffer = (UINT8 *)Buffer; Count > 0; Address += Stride, Uint8Buffer += Stride, Count--) {
+ if (Width == SMM_IO_UINT8) {
+ IoWrite8 ((UINTN)Address, *Uint8Buffer);
+ } else if (Width == SMM_IO_UINT16) {
+ IoWrite16 ((UINTN)Address, *((UINT16 *)Uint8Buffer));
+ } else if (Width == SMM_IO_UINT32) {
+ IoWrite32 ((UINTN)Address, *((UINT32 *)Uint8Buffer));
+ }
+ }
+
+ return EFI_SUCCESS;
+}
+
+/**
+ The module Entry Point SmmCpuIoProtocol driver
+
+ @param ImageHandle The firmware allocated handle for the EFI image.
+ @param SystemTable A pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS The entry point is executed successfully.
+ @retval Other Some error occurs when executing this entry point.
+
+**/
+EFI_STATUS
+EFIAPI
+SmmCpuIo2Initialize (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+ {
+ EFI_STATUS Status;
+
+ //
+ // Copy the SMM CPU I/O Protocol instance into the System Management System Table
+ //
+ CopyMem (&gSmst->SmmIo, &mSmmCpuIo2, sizeof (mSmmCpuIo2));
+
+ //
+ // Install the SMM CPU I/O Protocol into the SMM protocol database
+ //
+ Status = gSmst->SmmInstallProtocolInterface (
+ &mHandle,
+ &gEfiSmmCpuIo2ProtocolGuid,
+ EFI_NATIVE_INTERFACE,
+ &mSmmCpuIo2
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ return Status;
+}
diff --git a/UefiCpuPkg/CpuIo2Smm/CpuIo2Smm.inf b/UefiCpuPkg/CpuIo2Smm/CpuIo2Smm.inf new file mode 100644 index 0000000000..d8549f9fa3 --- /dev/null +++ b/UefiCpuPkg/CpuIo2Smm/CpuIo2Smm.inf @@ -0,0 +1,51 @@ +#/** @file
+# Component description file for CPU I/O SMM Driver.
+#
+# Copyright (c) 2009 - 2010, Intel Corporation.
+#
+# All rights reserved.
+# This software and associated documentation (if any) is furnished
+# under a license and may only be used or copied in accordance
+# with the terms of the license. Except as permitted by such
+# license, no part of this software or documentation may be
+# reproduced, stored in a retrieval system, or transmitted in any
+# form or by any means without the express written consent of
+# Intel Corporation.
+#
+#
+#**/
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = CpuIo2Smm
+ FILE_GUID = A47EE2D8-F60E-42fd-8E58-7BD65EE4C29B
+ MODULE_TYPE = DXE_SMM_DRIVER
+ VERSION_STRING = 1.0
+ PI_SPECIFICATION_VERSION = 0x0001000A
+ ENTRY_POINT = SmmCpuIo2Initialize
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+# VALID_ARCHITECTURES = IA32 X64
+#
+
+[Sources]
+ CpuIo2Smm.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+
+[LibraryClasses]
+ UefiDriverEntryPoint
+ BaseLib
+ DebugLib
+ IoLib
+ SmmServicesTableLib
+ BaseMemoryLib
+
+[Protocols]
+ gEfiSmmCpuIo2ProtocolGuid # PROTOCOL ALWAYS_CONSUMED
+
+[Depex]
+ TRUE
|