584d565227
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10419 6f19259b-4bc3-4df7-8a09-765794883524
215 lines
8.0 KiB
C
215 lines
8.0 KiB
C
/** @file
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Implementation of CPU I/O 2 Protocol based on Framework CPU I/O Protocol.
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Intel's Framework CPU I/O Protocol is replaced by CPU I/O 2 Protocol in PI.
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This module produces PI CPU I/O 2 Protocol on top of Framework CPU I/O Protocol.
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Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "CpuIo2OnCpuIoThunk.h"
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EFI_HANDLE mCpuIo2Handle = NULL;
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EFI_CPU_IO_PROTOCOL *mCpuIo;
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EFI_CPU_IO2_PROTOCOL mCpuIo2 = {
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{
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CpuMemoryServiceRead,
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CpuMemoryServiceWrite
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},
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{
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CpuIoServiceRead,
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CpuIoServiceWrite
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}
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};
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/**
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Enables a driver to read memory-mapped registers in the PI System memory space.
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@param[in] This A pointer to the EFI_CPU_IO2_PROTOCOL instance.
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@param[in] Width Signifies the width of the memory operation.
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@param[in] Address The base address of the memory operation.
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@param[in] Count The number of memory operations to perform. The number of bytes moved
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is Width size * Count, starting at Address.
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@param[in, out] Buffer The destination buffer to store the results.
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@retval EFI_SUCCESS The data was read from or written to the EFI system.
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@retval EFI_INVALID_PARAMETER Width is invalid for this EFI system. Or Buffer is NULL.
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@retval EFI_UNSUPPORTED The Buffer is not aligned for the given Width.
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Or,The address range specified by Address, Width, and Count is not valid for this EFI system.
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**/
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EFI_STATUS
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EFIAPI
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CpuMemoryServiceRead (
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IN EFI_CPU_IO2_PROTOCOL *This,
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IN EFI_CPU_IO_PROTOCOL_WIDTH Width,
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IN UINT64 Address,
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IN UINTN Count,
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IN OUT VOID *Buffer
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)
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{
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return mCpuIo->Mem.Read (
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mCpuIo,
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Width,
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Address,
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Count,
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Buffer
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);
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}
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/**
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Enables a driver to write memory-mapped registers in the PI System memory space.
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@param[in] This A pointer to the EFI_CPU_IO2_PROTOCOL instance.
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@param[in] Width Signifies the width of the memory operation.
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@param[in] Address The base address of the memory operation.
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@param[in] Count The number of memory operations to perform. The number of bytes moved
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is Width size * Count, starting at Address.
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@param[in, out] Buffer The source buffer from which to write data.
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@retval EFI_SUCCESS The data was read from or written to the EFI system.
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@retval EFI_INVALID_PARAMETER Width is invalid for this EFI system. Or Buffer is NULL.
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@retval EFI_UNSUPPORTED The Buffer is not aligned for the given Width.
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Or,The address range specified by Address, Width, and Count is not valid for this EFI system.
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**/
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EFI_STATUS
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EFIAPI
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CpuMemoryServiceWrite (
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IN EFI_CPU_IO2_PROTOCOL *This,
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IN EFI_CPU_IO_PROTOCOL_WIDTH Width,
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IN UINT64 Address,
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IN UINTN Count,
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IN OUT VOID *Buffer
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)
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{
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return mCpuIo->Mem.Write (
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mCpuIo,
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Width,
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Address,
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Count,
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Buffer
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);
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}
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/**
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Enables a driver to read registers in the PI CPU I/O space.
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@param[in] This A pointer to the EFI_CPU_IO2_PROTOCOL instance.
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@param[in] Width Signifies the width of the I/O operation.
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@param[in] Address The base address of the I/O operation. The caller is responsible
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for aligning the Address if required.
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@param[in] Count The number of I/O operations to perform. The number of bytes moved
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is Width size * Count, starting at Address.
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@param[in, out] Buffer The destination buffer to store the results.
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@retval EFI_SUCCESS The data was read from or written to the EFI system.
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@retval EFI_INVALID_PARAMETER Width is invalid for this EFI system. Or Buffer is NULL.
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@retval EFI_UNSUPPORTED The Buffer is not aligned for the given Width.
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Or,The address range specified by Address, Width, and Count is not valid for this EFI system.
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**/
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EFI_STATUS
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EFIAPI
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CpuIoServiceRead (
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IN EFI_CPU_IO2_PROTOCOL *This,
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IN EFI_CPU_IO_PROTOCOL_WIDTH Width,
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IN UINT64 Address,
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IN UINTN Count,
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IN OUT VOID *Buffer
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)
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{
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return mCpuIo->Io.Read (
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mCpuIo,
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Width,
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Address,
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Count,
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Buffer
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);
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}
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/**
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Enables a driver to write registers in the PI CPU I/O space.
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@param[in] This A pointer to the EFI_CPU_IO2_PROTOCOL instance.
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@param[in] Width Signifies the width of the I/O operation.
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@param[in] Address The base address of the I/O operation. The caller is responsible
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for aligning the Address if required.
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@param[in] Count The number of I/O operations to perform. The number of bytes moved
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is Width size * Count, starting at Address.
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@param[in, out] Buffer The source buffer from which to write data.
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@retval EFI_SUCCESS The data was read from or written to the EFI system.
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@retval EFI_INVALID_PARAMETER Width is invalid for this EFI system. Or Buffer is NULL.
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@retval EFI_UNSUPPORTED The Buffer is not aligned for the given Width.
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Or,The address range specified by Address, Width, and Count is not valid for this EFI system.
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**/
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EFI_STATUS
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EFIAPI
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CpuIoServiceWrite (
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IN EFI_CPU_IO2_PROTOCOL *This,
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IN EFI_CPU_IO_PROTOCOL_WIDTH Width,
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IN UINT64 Address,
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IN UINTN Count,
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IN OUT VOID *Buffer
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)
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{
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return mCpuIo->Io.Write (
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mCpuIo,
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Width,
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Address,
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Count,
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Buffer
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);
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}
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/**
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Entrypoint of CPU I/O 2 DXE thunk module.
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@param ImageHandle The firmware allocated handle for the EFI image.
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@param SystemTable A pointer to the EFI System Table.
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@retval EFI_SUCCESS The entry point is executed successfully.
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**/
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EFI_STATUS
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EFIAPI
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CpuIo2OnCpuIoThunkInitialize (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_STATUS Status;
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//
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// Locate and cache Framework CPU I/O Protocol.
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//
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Status = gBS->LocateProtocol (
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&gEfiCpuIoProtocolGuid,
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NULL,
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(VOID **) &mCpuIo
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);
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ASSERT_EFI_ERROR (Status);
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//
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// Install the CPU I/O 2 Protocol on a new handle.
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//
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Status = gBS->InstallMultipleProtocolInterfaces (
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&mCpuIo2Handle,
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&gEfiCpuIo2ProtocolGuid, &mCpuIo2,
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NULL
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);
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ASSERT_EFI_ERROR (Status);
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return Status;
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}
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