47fc17d8a9
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6330 6f19259b-4bc3-4df7-8a09-765794883524
652 lines
24 KiB
C
652 lines
24 KiB
C
/** @file
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IA-32/x64 MSR functions.
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Copyright (c) 2006, Intel Corporation<BR>
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All rights reserved. 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 "BaseLibInternals.h"
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/**
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Returns the lower 32-bits of a Machine Specific Register(MSR).
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Reads and returns the lower 32-bits of the MSR specified by Index.
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No parameter checking is performed on Index, and some Index values may cause
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CPU exceptions. The caller must either guarantee that Index is valid, or the
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caller must set up exception handlers to catch the exceptions. This function
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is only available on IA-32 and X64.
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@param Index The 32-bit MSR index to read.
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@return The lower 32 bits of the MSR identified by Index.
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**/
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UINT32
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EFIAPI
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AsmReadMsr32 (
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IN UINT32 Index
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)
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{
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return (UINT32)AsmReadMsr64 (Index);
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}
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/**
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Zero-extend a 32-bit value and writes it to a Machine Specific Register(MSR).
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Writes the 32-bit value specified by Value to the MSR specified by Index. The
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upper 32-bits of the MSR write are set to zero. The 32-bit value written to
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the MSR is returned. No parameter checking is performed on Index or Value,
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and some of these may cause CPU exceptions. The caller must either guarantee
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that Index and Value are valid, or the caller must establish proper exception
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handlers. This function is only available on IA-32 and X64.
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@param Index The 32-bit MSR index to write.
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@param Value The 32-bit value to write to the MSR.
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@return Value
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**/
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UINT32
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EFIAPI
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AsmWriteMsr32 (
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IN UINT32 Index,
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IN UINT32 Value
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)
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{
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return (UINT32)AsmWriteMsr64 (Index, Value);
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}
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/**
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Reads a 64-bit MSR, performs a bitwise inclusive OR on the lower 32-bits, and
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writes the result back to the 64-bit MSR.
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Reads the 64-bit MSR specified by Index, performs a bitwise inclusive OR
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between the lower 32-bits of the read result and the value specified by
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OrData, and writes the result to the 64-bit MSR specified by Index. The lower
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32-bits of the value written to the MSR is returned. No parameter checking is
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performed on Index or OrData, and some of these may cause CPU exceptions. The
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caller must either guarantee that Index and OrData are valid, or the caller
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must establish proper exception handlers. This function is only available on
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IA-32 and X64.
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@param Index The 32-bit MSR index to write.
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@param OrData The value to OR with the read value from the MSR.
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@return The lower 32-bit value written to the MSR.
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**/
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UINT32
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EFIAPI
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AsmMsrOr32 (
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IN UINT32 Index,
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IN UINT32 OrData
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)
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{
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return (UINT32)AsmMsrOr64 (Index, OrData);
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}
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/**
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Reads a 64-bit MSR, performs a bitwise AND on the lower 32-bits, and writes
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the result back to the 64-bit MSR.
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Reads the 64-bit MSR specified by Index, performs a bitwise AND between the
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lower 32-bits of the read result and the value specified by AndData, and
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writes the result to the 64-bit MSR specified by Index. The lower 32-bits of
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the value written to the MSR is returned. No parameter checking is performed
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on Index or AndData, and some of these may cause CPU exceptions. The caller
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must either guarantee that Index and AndData are valid, or the caller must
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establish proper exception handlers. This function is only available on IA-32
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and X64.
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@param Index The 32-bit MSR index to write.
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@param AndData The value to AND with the read value from the MSR.
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@return The lower 32-bit value written to the MSR.
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**/
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UINT32
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EFIAPI
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AsmMsrAnd32 (
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IN UINT32 Index,
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IN UINT32 AndData
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)
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{
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return (UINT32)AsmMsrAnd64 (Index, AndData);
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}
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/**
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Reads a 64-bit MSR, performs a bitwise AND followed by a bitwise inclusive OR
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on the lower 32-bits, and writes the result back to the 64-bit MSR.
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Reads the 64-bit MSR specified by Index, performs a bitwise AND between the
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lower 32-bits of the read result and the value specified by AndData
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preserving the upper 32-bits, performs a bitwise inclusive OR between the
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result of the AND operation and the value specified by OrData, and writes the
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result to the 64-bit MSR specified by Address. The lower 32-bits of the value
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written to the MSR is returned. No parameter checking is performed on Index,
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AndData, or OrData, and some of these may cause CPU exceptions. The caller
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must either guarantee that Index, AndData, and OrData are valid, or the
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caller must establish proper exception handlers. This function is only
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available on IA-32 and X64.
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@param Index The 32-bit MSR index to write.
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@param AndData The value to AND with the read value from the MSR.
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@param OrData The value to OR with the result of the AND operation.
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@return The lower 32-bit value written to the MSR.
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**/
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UINT32
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EFIAPI
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AsmMsrAndThenOr32 (
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IN UINT32 Index,
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IN UINT32 AndData,
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IN UINT32 OrData
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)
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{
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return (UINT32)AsmMsrAndThenOr64 (Index, AndData, OrData);
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}
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/**
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Reads a bit field of an MSR.
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Reads the bit field in the lower 32-bits of a 64-bit MSR. The bit field is
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specified by the StartBit and the EndBit. The value of the bit field is
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returned. The caller must either guarantee that Index is valid, or the caller
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must set up exception handlers to catch the exceptions. This function is only
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available on IA-32 and X64.
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If StartBit is greater than 31, then ASSERT().
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If EndBit is greater than 31, then ASSERT().
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If EndBit is less than StartBit, then ASSERT().
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@param Index The 32-bit MSR index to read.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..31.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..31.
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@return The bit field read from the MSR.
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**/
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UINT32
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EFIAPI
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AsmMsrBitFieldRead32 (
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IN UINT32 Index,
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IN UINTN StartBit,
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IN UINTN EndBit
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)
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{
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return BitFieldRead32 (AsmReadMsr32 (Index), StartBit, EndBit);
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}
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/**
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Writes a bit field to an MSR.
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Writes Value to a bit field in the lower 32-bits of a 64-bit MSR. The bit
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field is specified by the StartBit and the EndBit. All other bits in the
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destination MSR are preserved. The lower 32-bits of the MSR written is
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returned. Extra left bits in Value are stripped. The caller must either
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guarantee that Index and the data written is valid, or the caller must set up
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exception handlers to catch the exceptions. This function is only available
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on IA-32 and X64.
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If StartBit is greater than 31, then ASSERT().
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If EndBit is greater than 31, then ASSERT().
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If EndBit is less than StartBit, then ASSERT().
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@param Index The 32-bit MSR index to write.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..31.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..31.
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@param Value New value of the bit field.
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@return The lower 32-bit of the value written to the MSR.
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**/
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UINT32
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EFIAPI
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AsmMsrBitFieldWrite32 (
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IN UINT32 Index,
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IN UINTN StartBit,
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IN UINTN EndBit,
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IN UINT32 Value
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)
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{
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ASSERT (EndBit < sizeof (Value) * 8);
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ASSERT (StartBit <= EndBit);
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return (UINT32)AsmMsrBitFieldWrite64 (Index, StartBit, EndBit, Value);
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}
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/**
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Reads a bit field in a 64-bit MSR, performs a bitwise OR, and writes the
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result back to the bit field in the 64-bit MSR.
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Reads the 64-bit MSR specified by Index, performs a bitwise inclusive OR
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between the read result and the value specified by OrData, and writes the
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result to the 64-bit MSR specified by Index. The lower 32-bits of the value
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written to the MSR are returned. Extra left bits in OrData are stripped. The
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caller must either guarantee that Index and the data written is valid, or
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the caller must set up exception handlers to catch the exceptions. This
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function is only available on IA-32 and X64.
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If StartBit is greater than 31, then ASSERT().
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If EndBit is greater than 31, then ASSERT().
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If EndBit is less than StartBit, then ASSERT().
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@param Index The 32-bit MSR index to write.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..31.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..31.
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@param OrData The value to OR with the read value from the MSR.
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@return The lower 32-bit of the value written to the MSR.
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**/
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UINT32
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EFIAPI
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AsmMsrBitFieldOr32 (
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IN UINT32 Index,
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IN UINTN StartBit,
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IN UINTN EndBit,
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IN UINT32 OrData
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)
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{
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ASSERT (EndBit < sizeof (OrData) * 8);
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ASSERT (StartBit <= EndBit);
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return (UINT32)AsmMsrBitFieldOr64 (Index, StartBit, EndBit, OrData);
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}
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/**
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Reads a bit field in a 64-bit MSR, performs a bitwise AND, and writes the
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result back to the bit field in the 64-bit MSR.
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Reads the 64-bit MSR specified by Index, performs a bitwise AND between the
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read result and the value specified by AndData, and writes the result to the
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64-bit MSR specified by Index. The lower 32-bits of the value written to the
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MSR are returned. Extra left bits in AndData are stripped. The caller must
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either guarantee that Index and the data written is valid, or the caller must
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set up exception handlers to catch the exceptions. This function is only
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available on IA-32 and X64.
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If StartBit is greater than 31, then ASSERT().
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If EndBit is greater than 31, then ASSERT().
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If EndBit is less than StartBit, then ASSERT().
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@param Index The 32-bit MSR index to write.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..31.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..31.
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@param AndData The value to AND with the read value from the MSR.
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@return The lower 32-bit of the value written to the MSR.
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**/
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UINT32
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EFIAPI
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AsmMsrBitFieldAnd32 (
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IN UINT32 Index,
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IN UINTN StartBit,
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IN UINTN EndBit,
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IN UINT32 AndData
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)
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{
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ASSERT (EndBit < sizeof (AndData) * 8);
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ASSERT (StartBit <= EndBit);
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return (UINT32)AsmMsrBitFieldAnd64 (Index, StartBit, EndBit, AndData);
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}
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/**
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Reads a bit field in a 64-bit MSR, performs a bitwise AND followed by a
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bitwise inclusive OR, and writes the result back to the bit field in the
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64-bit MSR.
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Reads the 64-bit MSR specified by Index, performs a bitwise AND followed by a
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bitwise inclusive OR between the read result and the value specified by
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AndData, and writes the result to the 64-bit MSR specified by Index. The
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lower 32-bits of the value written to the MSR are returned. Extra left bits
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in both AndData and OrData are stripped. The caller must either guarantee
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that Index and the data written is valid, or the caller must set up exception
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handlers to catch the exceptions. This function is only available on IA-32
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and X64.
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If StartBit is greater than 31, then ASSERT().
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If EndBit is greater than 31, then ASSERT().
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If EndBit is less than StartBit, then ASSERT().
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@param Index The 32-bit MSR index to write.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..31.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..31.
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@param AndData The value to AND with the read value from the MSR.
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@param OrData The value to OR with the result of the AND operation.
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@return The lower 32-bit of the value written to the MSR.
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**/
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UINT32
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EFIAPI
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AsmMsrBitFieldAndThenOr32 (
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IN UINT32 Index,
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IN UINTN StartBit,
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IN UINTN EndBit,
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IN UINT32 AndData,
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IN UINT32 OrData
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)
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{
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ASSERT (EndBit < sizeof (AndData) * 8);
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ASSERT (StartBit <= EndBit);
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return (UINT32)AsmMsrBitFieldAndThenOr64 (
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Index,
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StartBit,
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EndBit,
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AndData,
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OrData
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);
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}
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/**
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Reads a 64-bit MSR, performs a bitwise inclusive OR, and writes the result
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back to the 64-bit MSR.
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Reads the 64-bit MSR specified by Index, performs a bitwise inclusive OR
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between the read result and the value specified by OrData, and writes the
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result to the 64-bit MSR specified by Index. The value written to the MSR is
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returned. No parameter checking is performed on Index or OrData, and some of
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these may cause CPU exceptions. The caller must either guarantee that Index
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and OrData are valid, or the caller must establish proper exception handlers.
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This function is only available on IA-32 and X64.
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@param Index The 32-bit MSR index to write.
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@param OrData The value to OR with the read value from the MSR.
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@return The value written back to the MSR.
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**/
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UINT64
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EFIAPI
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AsmMsrOr64 (
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IN UINT32 Index,
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IN UINT64 OrData
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)
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{
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return AsmWriteMsr64 (Index, AsmReadMsr64 (Index) | OrData);
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}
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/**
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Reads a 64-bit MSR, performs a bitwise AND, and writes the result back to the
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64-bit MSR.
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Reads the 64-bit MSR specified by Index, performs a bitwise AND between the
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read result and the value specified by OrData, and writes the result to the
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64-bit MSR specified by Index. The value written to the MSR is returned. No
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parameter checking is performed on Index or OrData, and some of these may
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cause CPU exceptions. The caller must either guarantee that Index and OrData
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are valid, or the caller must establish proper exception handlers. This
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function is only available on IA-32 and X64.
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@param Index The 32-bit MSR index to write.
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@param AndData The value to AND with the read value from the MSR.
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@return The value written back to the MSR.
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**/
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UINT64
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EFIAPI
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AsmMsrAnd64 (
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IN UINT32 Index,
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IN UINT64 AndData
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)
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{
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return AsmWriteMsr64 (Index, AsmReadMsr64 (Index) & AndData);
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}
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/**
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Reads a 64-bit MSR, performs a bitwise AND followed by a bitwise inclusive
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OR, and writes the result back to the 64-bit MSR.
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Reads the 64-bit MSR specified by Index, performs a bitwise AND between read
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result and the value specified by AndData, performs a bitwise inclusive OR
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between the result of the AND operation and the value specified by OrData,
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and writes the result to the 64-bit MSR specified by Index. The value written
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to the MSR is returned. No parameter checking is performed on Index, AndData,
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or OrData, and some of these may cause CPU exceptions. The caller must either
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guarantee that Index, AndData, and OrData are valid, or the caller must
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establish proper exception handlers. This function is only available on IA-32
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and X64.
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@param Index The 32-bit MSR index to write.
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@param AndData The value to AND with the read value from the MSR.
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@param OrData The value to OR with the result of the AND operation.
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@return The value written back to the MSR.
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**/
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UINT64
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EFIAPI
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AsmMsrAndThenOr64 (
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IN UINT32 Index,
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IN UINT64 AndData,
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IN UINT64 OrData
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)
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{
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return AsmWriteMsr64 (Index, (AsmReadMsr64 (Index) & AndData) | OrData);
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}
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/**
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Reads a bit field of an MSR.
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Reads the bit field in the 64-bit MSR. The bit field is specified by the
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StartBit and the EndBit. The value of the bit field is returned. The caller
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must either guarantee that Index is valid, or the caller must set up
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|
exception handlers to catch the exceptions. This function is only available
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|
on IA-32 and X64.
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|
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If StartBit is greater than 63, then ASSERT().
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If EndBit is greater than 63, then ASSERT().
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If EndBit is less than StartBit, then ASSERT().
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@param Index The 32-bit MSR index to read.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..63.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..63.
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@return The value written back to the MSR.
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**/
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UINT64
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EFIAPI
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AsmMsrBitFieldRead64 (
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IN UINT32 Index,
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IN UINTN StartBit,
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IN UINTN EndBit
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)
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{
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return BitFieldRead64 (AsmReadMsr64 (Index), StartBit, EndBit);
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}
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/**
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Writes a bit field to an MSR.
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Writes Value to a bit field in a 64-bit MSR. The bit field is specified by
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the StartBit and the EndBit. All other bits in the destination MSR are
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preserved. The MSR written is returned. Extra left bits in Value are
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stripped. The caller must either guarantee that Index and the data written is
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valid, or the caller must set up exception handlers to catch the exceptions.
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This function is only available on IA-32 and X64.
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If StartBit is greater than 63, then ASSERT().
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If EndBit is greater than 63, then ASSERT().
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If EndBit is less than StartBit, then ASSERT().
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@param Index The 32-bit MSR index to write.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..63.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..63.
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@param Value New value of the bit field.
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@return The value written back to the MSR.
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**/
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UINT64
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EFIAPI
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AsmMsrBitFieldWrite64 (
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IN UINT32 Index,
|
|
IN UINTN StartBit,
|
|
IN UINTN EndBit,
|
|
IN UINT64 Value
|
|
)
|
|
{
|
|
return AsmWriteMsr64 (
|
|
Index,
|
|
BitFieldWrite64 (AsmReadMsr64 (Index), StartBit, EndBit, Value)
|
|
);
|
|
}
|
|
|
|
/**
|
|
Reads a bit field in a 64-bit MSR, performs a bitwise inclusive OR, and
|
|
writes the result back to the bit field in the 64-bit MSR.
|
|
|
|
Reads the 64-bit MSR specified by Index, performs a bitwise inclusive OR
|
|
between the read result and the value specified by OrData, and writes the
|
|
result to the 64-bit MSR specified by Index. The value written to the MSR is
|
|
returned. Extra left bits in OrData are stripped. The caller must either
|
|
guarantee that Index and the data written is valid, or the caller must set up
|
|
exception handlers to catch the exceptions. This function is only available
|
|
on IA-32 and X64.
|
|
|
|
If StartBit is greater than 63, then ASSERT().
|
|
If EndBit is greater than 63, then ASSERT().
|
|
If EndBit is less than StartBit, then ASSERT().
|
|
|
|
@param Index The 32-bit MSR index to write.
|
|
@param StartBit The ordinal of the least significant bit in the bit field.
|
|
Range 0..63.
|
|
@param EndBit The ordinal of the most significant bit in the bit field.
|
|
Range 0..63.
|
|
@param OrData The value to OR with the read value from the bit field.
|
|
|
|
@return The value written back to the MSR.
|
|
|
|
**/
|
|
UINT64
|
|
EFIAPI
|
|
AsmMsrBitFieldOr64 (
|
|
IN UINT32 Index,
|
|
IN UINTN StartBit,
|
|
IN UINTN EndBit,
|
|
IN UINT64 OrData
|
|
)
|
|
{
|
|
return AsmWriteMsr64 (
|
|
Index,
|
|
BitFieldOr64 (AsmReadMsr64 (Index), StartBit, EndBit, OrData)
|
|
);
|
|
}
|
|
|
|
/**
|
|
Reads a bit field in a 64-bit MSR, performs a bitwise AND, and writes the
|
|
result back to the bit field in the 64-bit MSR.
|
|
|
|
Reads the 64-bit MSR specified by Index, performs a bitwise AND between the
|
|
read result and the value specified by AndData, and writes the result to the
|
|
64-bit MSR specified by Index. The value written to the MSR is returned.
|
|
Extra left bits in AndData are stripped. The caller must either guarantee
|
|
that Index and the data written is valid, or the caller must set up exception
|
|
handlers to catch the exceptions. This function is only available on IA-32
|
|
and X64.
|
|
|
|
If StartBit is greater than 63, then ASSERT().
|
|
If EndBit is greater than 63, then ASSERT().
|
|
If EndBit is less than StartBit, then ASSERT().
|
|
|
|
@param Index The 32-bit MSR index to write.
|
|
@param StartBit The ordinal of the least significant bit in the bit field.
|
|
Range 0..63.
|
|
@param EndBit The ordinal of the most significant bit in the bit field.
|
|
Range 0..63.
|
|
@param AndData The value to AND with the read value from the bit field.
|
|
|
|
@return The value written back to the MSR.
|
|
|
|
**/
|
|
UINT64
|
|
EFIAPI
|
|
AsmMsrBitFieldAnd64 (
|
|
IN UINT32 Index,
|
|
IN UINTN StartBit,
|
|
IN UINTN EndBit,
|
|
IN UINT64 AndData
|
|
)
|
|
{
|
|
return AsmWriteMsr64 (
|
|
Index,
|
|
BitFieldAnd64 (AsmReadMsr64 (Index), StartBit, EndBit, AndData)
|
|
);
|
|
}
|
|
|
|
/**
|
|
Reads a bit field in a 64-bit MSR, performs a bitwise AND followed by a
|
|
bitwise inclusive OR, and writes the result back to the bit field in the
|
|
64-bit MSR.
|
|
|
|
Reads the 64-bit MSR specified by Index, performs a bitwise AND followed by
|
|
a bitwise inclusive OR between the read result and the value specified by
|
|
AndData, and writes the result to the 64-bit MSR specified by Index. The
|
|
value written to the MSR is returned. Extra left bits in both AndData and
|
|
OrData are stripped. The caller must either guarantee that Index and the data
|
|
written is valid, or the caller must set up exception handlers to catch the
|
|
exceptions. This function is only available on IA-32 and X64.
|
|
|
|
If StartBit is greater than 63, then ASSERT().
|
|
If EndBit is greater than 63, then ASSERT().
|
|
If EndBit is less than StartBit, then ASSERT().
|
|
|
|
@param Index The 32-bit MSR index to write.
|
|
@param StartBit The ordinal of the least significant bit in the bit field.
|
|
Range 0..63.
|
|
@param EndBit The ordinal of the most significant bit in the bit field.
|
|
Range 0..63.
|
|
@param AndData The value to AND with the read value from the bit field.
|
|
@param OrData The value to OR with the result of the AND operation.
|
|
|
|
@return The value written back to the MSR.
|
|
|
|
**/
|
|
UINT64
|
|
EFIAPI
|
|
AsmMsrBitFieldAndThenOr64 (
|
|
IN UINT32 Index,
|
|
IN UINTN StartBit,
|
|
IN UINTN EndBit,
|
|
IN UINT64 AndData,
|
|
IN UINT64 OrData
|
|
)
|
|
{
|
|
return AsmWriteMsr64 (
|
|
Index,
|
|
BitFieldAndThenOr64 (
|
|
AsmReadMsr64 (Index),
|
|
StartBit,
|
|
EndBit,
|
|
AndData,
|
|
OrData
|
|
)
|
|
);
|
|
}
|