diff options
Diffstat (limited to 'EdkCompatibilityPkg/Compatibility/CpuIo2OnCpuIoThunk/CpuIo2OnCpuIoThunk.c')
| -rw-r--r-- | EdkCompatibilityPkg/Compatibility/CpuIo2OnCpuIoThunk/CpuIo2OnCpuIoThunk.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/EdkCompatibilityPkg/Compatibility/CpuIo2OnCpuIoThunk/CpuIo2OnCpuIoThunk.c b/EdkCompatibilityPkg/Compatibility/CpuIo2OnCpuIoThunk/CpuIo2OnCpuIoThunk.c new file mode 100644 index 0000000000..261d6cd97a --- /dev/null +++ b/EdkCompatibilityPkg/Compatibility/CpuIo2OnCpuIoThunk/CpuIo2OnCpuIoThunk.c @@ -0,0 +1,214 @@ +/** @file
+ Implementation of CPU I/O 2 Protocol based on Framework CPU I/O Protocol.
+
+ Intel's Framework CPU I/O Protocol is replaced by CPU I/O 2 Protocol in PI.
+ This module produces PI CPU I/O 2 Protocol on top of Framework CPU I/O Protocol.
+
+Copyright (c) 2009, 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 "CpuIo2OnCpuIoThunk.h"
+
+EFI_HANDLE mCpuIo2Handle = NULL;
+EFI_CPU_IO_PROTOCOL *mCpuIo;
+EFI_CPU_IO2_PROTOCOL mCpuIo2 = {
+ {
+ CpuMemoryServiceRead,
+ CpuMemoryServiceWrite
+ },
+ {
+ CpuIoServiceRead,
+ CpuIoServiceWrite
+ }
+};
+
+/**
+ Enables a driver to read memory-mapped registers in the PI System memory space.
+
+ @param[in] This A pointer to the EFI_CPU_IO2_PROTOCOL instance.
+ @param[in] Width Signifies the width of the memory operation.
+ @param[in] Address The base address of the memory operation.
+ @param[in] Count The number of memory operations to perform. The number of bytes moved
+ is Width size * Count, starting at Address.
+ @param[out] Buffer The destination buffer to store the results.
+
+ @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 EFI_CPU_IO2_PROTOCOL *This,
+ IN EFI_CPU_IO_PROTOCOL_WIDTH Width,
+ IN UINT64 Address,
+ IN UINTN Count,
+ OUT VOID *Buffer
+ )
+{
+ return mCpuIo->Mem.Read (
+ mCpuIo,
+ Width,
+ Address,
+ Count,
+ Buffer
+ );
+}
+
+/**
+ Enables a driver to write memory-mapped registers in the PI System memory space.
+
+ @param[in] This A pointer to the EFI_CPU_IO2_PROTOCOL instance.
+ @param[in] Width Signifies the width of the memory operation.
+ @param[in] Address The base address of the memory operation.
+ @param[in] Count The number of memory operations to perform. The number of bytes moved
+ is Width size * Count, starting at Address.
+ @param[in] Buffer 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 EFI_CPU_IO2_PROTOCOL *This,
+ IN EFI_CPU_IO_PROTOCOL_WIDTH Width,
+ IN UINT64 Address,
+ IN UINTN Count,
+ IN VOID *Buffer
+ )
+{
+ return mCpuIo->Mem.Write (
+ mCpuIo,
+ Width,
+ Address,
+ Count,
+ Buffer
+ );
+}
+
+/**
+ Enables a driver to read registers in the PI CPU I/O space.
+
+ @param[in] This A pointer to the EFI_CPU_IO2_PROTOCOL instance.
+ @param[in] Width Signifies the width of the I/O operation.
+ @param[in] Address 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. The number of bytes moved
+ is Width size * Count, starting at Address.
+ @param[out] Buffer The destination buffer to store the results.
+
+ @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 EFI_CPU_IO2_PROTOCOL *This,
+ IN EFI_CPU_IO_PROTOCOL_WIDTH Width,
+ IN UINT64 Address,
+ IN UINTN Count,
+ OUT VOID *Buffer
+ )
+{
+ return mCpuIo->Io.Read (
+ mCpuIo,
+ Width,
+ Address,
+ Count,
+ Buffer
+ );
+}
+
+/**
+ Enables a driver to write registers in the PI CPU I/O space.
+
+ @param[in] This A pointer to the EFI_CPU_IO2_PROTOCOL instance.
+ @param[in] Width Signifies the width of the I/O operation.
+ @param[in] Address 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. The number of bytes moved
+ is Width size * Count, starting at Address.
+ @param[in] Buffer 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 EFI_CPU_IO2_PROTOCOL *This,
+ IN EFI_CPU_IO_PROTOCOL_WIDTH Width,
+ IN UINT64 Address,
+ IN UINTN Count,
+ IN VOID *Buffer
+ )
+{
+ return mCpuIo->Io.Write (
+ mCpuIo,
+ Width,
+ Address,
+ Count,
+ Buffer
+ );
+}
+
+/**
+ Entrypoint of CPU I/O 2 DXE thunk module.
+
+ @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.
+
+**/
+EFI_STATUS
+EFIAPI
+CpuIo2OnCpuIoThunkInitialize (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+
+ //
+ // Locate and cache Framework CPU I/O Protocol.
+ //
+ Status = gBS->LocateProtocol (
+ &gEfiCpuIoProtocolGuid,
+ NULL,
+ (VOID **) &mCpuIo
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Install the CPU I/O 2 Protocol on a new handle.
+ //
+ Status = gBS->InstallMultipleProtocolInterfaces (
+ &mCpuIo2Handle,
+ &gEfiCpuIo2ProtocolGuid, &mCpuIo2,
+ NULL
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ return Status;
+}
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