/** @file
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Null instance of RegisterFilterLib.
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Copyright (c) 2021 Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/RegisterFilterLib.h>
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/**
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Filter IO read operation before read IO port.
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It is used to filter IO read operation.
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It will return the flag to decide whether require read real IO port.
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It can be used for emulation environment.
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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.
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@param[in,out] Buffer The destination buffer to store the results.
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@retval TRUE Need to excute the IO read.
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@retval FALSE Skip the IO read.
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**/
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BOOLEAN
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EFIAPI
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FilterBeforeIoRead (
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IN FILTER_IO_WIDTH Width,
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IN UINTN Address,
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IN OUT VOID *Buffer
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)
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{
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return TRUE;
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}
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/**
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Trace IO read operation after read IO port.
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It is used to trace IO operation.
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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.
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@param[in] Buffer The destination buffer to store the results.
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**/
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VOID
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EFIAPI
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FilterAfterIoRead (
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IN FILTER_IO_WIDTH Width,
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IN UINTN Address,
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IN VOID *Buffer
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)
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{
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return;
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}
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/**
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Filter IO Write operation before wirte IO port.
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It is used to filter IO operation.
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It will return the flag to decide whether require read write IO port.
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It can be used for emulation environment.
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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.
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@param[in] Buffer The source buffer from which to write data.
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@retval TRUE Need to excute the IO write.
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@retval FALSE Skip the IO write.
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**/
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BOOLEAN
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EFIAPI
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FilterBeforeIoWrite (
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IN FILTER_IO_WIDTH Width,
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IN UINTN Address,
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IN VOID *Buffer
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)
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{
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return TRUE;
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}
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/**
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Trace IO Write operation after wirte IO port.
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It is used to trace IO operation.
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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.
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@param[in] Buffer The source buffer from which to Write data.
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**/
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VOID
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EFIAPI
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FilterAfterIoWrite (
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IN FILTER_IO_WIDTH Width,
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IN UINTN Address,
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IN VOID *Buffer
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)
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{
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return;
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}
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/**
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Filter memory IO before Read operation.
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It will return the flag to decide whether require read real MMIO.
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It can be used for emulation environment.
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@param[in] Width Signifies the width of the memory I/O operation.
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@param[in] Address The base address of the memory I/O operation.
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@param[in,out] Buffer The destination buffer to store the results.
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@retval TRUE Need to excute the MMIO read.
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@retval FALSE Skip the MMIO read.
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**/
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BOOLEAN
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EFIAPI
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FilterBeforeMmIoRead (
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IN FILTER_IO_WIDTH Width,
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IN UINTN Address,
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IN OUT VOID *Buffer
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)
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{
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return TRUE;
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}
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/**
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Tracer memory IO after read operation.
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@param[in] Width Signifies the width of the memory I/O operation.
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@param[in] Address The base address of the memory I/O operation.
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@param[in] Buffer The destination buffer to store the results.
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**/
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VOID
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EFIAPI
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FilterAfterMmIoRead (
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IN FILTER_IO_WIDTH Width,
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IN UINTN Address,
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IN VOID *Buffer
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)
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{
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return;
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}
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/**
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Filter memory IO before write operation.
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It will return the flag to decide whether require wirte real MMIO.
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It can be used for emulation environment.
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@param[in] Width Signifies the width of the memory I/O operation.
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@param[in] Address The base address of the memory I/O operation.
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@param[in] Buffer The source buffer from which to write data.
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@retval TRUE Need to excute the MMIO write.
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@retval FALSE Skip the MMIO write.
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**/
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BOOLEAN
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EFIAPI
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FilterBeforeMmIoWrite (
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IN FILTER_IO_WIDTH Width,
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IN UINTN Address,
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IN VOID *Buffer
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)
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{
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return TRUE;
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}
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/**
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Tracer memory IO after write operation.
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@param[in] Width Signifies the width of the memory I/O operation.
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@param[in] Address The base address of the memory I/O operation.
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@param[in] Buffer The source buffer from which to write data.
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**/
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VOID
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EFIAPI
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FilterAfterMmIoWrite (
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IN FILTER_IO_WIDTH Width,
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IN UINTN Address,
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IN VOID *Buffer
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)
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{
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return;
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}
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/**
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Filter MSR before read operation.
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It will return the flag to decide whether require read real MSR.
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It can be used for emulation environment.
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@param Index The Register index of the MSR.
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@param Value Point to the data will be read from the MSR.
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@retval TRUE Need to excute the MSR read.
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@retval FALSE Skip the MSR read.
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**/
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BOOLEAN
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EFIAPI
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FilterBeforeMsrRead (
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IN UINT32 Index,
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IN OUT UINT64 *Value
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)
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{
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return TRUE;
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}
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/**
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Trace MSR after read operation.
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@param Index The Register index of the MSR.
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@param Value Point to the data has been be read from the MSR.
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**/
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VOID
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EFIAPI
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FilterAfterMsrRead (
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IN UINT32 Index,
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IN UINT64 *Value
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)
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{
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return;
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}
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/**
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Filter MSR before write operation.
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It will return the flag to decide whether require write real MSR.
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It can be used for emulation environment.
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@param Index The Register index of the MSR.
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@param Value Point to the data want to be written to the MSR.
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@retval TRUE Need to excute the MSR write.
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@retval FALSE Skip the MSR write.
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**/
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BOOLEAN
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EFIAPI
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FilterBeforeMsrWrite (
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IN UINT32 Index,
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IN UINT64 *Value
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)
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{
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return TRUE;
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}
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/**
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Trace MSR after write operation.
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@param Index The Register index of the MSR.
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@param Value Point to the data has been be written to the MSR.
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**/
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VOID
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EFIAPI
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FilterAfterMsrWrite (
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IN UINT32 Index,
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IN UINT64 *Value
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)
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{
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return;
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}
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