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Diffstat (limited to 'EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/x86Msr.c')
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diff --git a/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/x86Msr.c b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/x86Msr.c new file mode 100644 index 0000000..e22489b --- /dev/null +++ b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/x86Msr.c @@ -0,0 +1,657 @@ +/*++ + +Copyright (c) 2004 - 2006, 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. + + +Module Name: + + x86Msr.c + +Abstract: + + IA-32/x64 specific functions. + +--*/ + +#include "BaseLibInternal.h" + +/** + Returns the lower 32-bits of a Machine Specific Register(MSR). + + Reads and returns the lower 32-bits of the MSR specified by Index. + No parameter checking is performed on Index, and some Index values may cause + CPU exceptions. The caller must either guarantee that Index is valid, or the + caller must set up exception handlers to catch the exceptions. This function + is only available on IA-32 and X64. + + @param Index The 32-bit MSR index to read. + + @return The lower 32 bits of the MSR identified by Index. + +**/ +UINT32 +EFIAPI +AsmReadMsr32 ( + IN UINT32 Index + ) +{ + return (UINT32)AsmReadMsr64 (Index); +} + +/** + Zero-extend a 32-bit value and writes it to a Machine Specific Register(MSR). + + Writes the 32-bit value specified by Value to the MSR specified by Index. The + upper 32-bits of the MSR write are set to zero. The 32-bit value written to + the MSR is returned. No parameter checking is performed on Index or Value, + and some of these may cause CPU exceptions. The caller must either guarantee + that Index and Value are valid, or the caller must establish proper exception + handlers. This function is only available on IA-32 and X64. + + @param Index The 32-bit MSR index to write. + @param Value The 32-bit value to write to the MSR. + + @return Value + +**/ +UINT32 +EFIAPI +AsmWriteMsr32 ( + IN UINT32 Index, + IN UINT32 Value + ) +{ + return (UINT32)AsmWriteMsr64 (Index, Value); +} + +/** + Reads a 64-bit MSR, performs a bitwise inclusive OR on the lower 32-bits, and + writes the result back to the 64-bit MSR. + + Reads the 64-bit MSR specified by Index, performs a bitwise inclusive OR + between the lower 32-bits of the read result and the value specified by + OrData, and writes the result to the 64-bit MSR specified by Index. The lower + 32-bits of the value written to the MSR is returned. No parameter checking is + performed on Index or OrData, and some of these may cause CPU exceptions. The + caller must either guarantee that Index and OrData are valid, or the caller + must establish proper exception handlers. This function is only available on + IA-32 and X64. + + @param Index The 32-bit MSR index to write. + @param OrData The value to OR with the read value from the MSR. + + @return The lower 32-bit value written to the MSR. + +**/ +UINT32 +EFIAPI +AsmMsrOr32 ( + IN UINT32 Index, + IN UINT32 OrData + ) +{ + return (UINT32)AsmMsrOr64 (Index, OrData); +} + +/** + Reads a 64-bit MSR, performs a bitwise AND on the lower 32-bits, and writes + the result back to the 64-bit MSR. + + Reads the 64-bit MSR specified by Index, performs a bitwise AND between the + lower 32-bits of the read result and the value specified by AndData, and + writes the result to the 64-bit MSR specified by Index. The lower 32-bits of + the value written to the MSR is returned. No parameter checking is performed + on Index or AndData, and some of these may cause CPU exceptions. The caller + must either guarantee that Index and AndData are valid, or the caller must + establish proper exception handlers. This function is only available on IA-32 + and X64. + + @param Index The 32-bit MSR index to write. + @param AndData The value to AND with the read value from the MSR. + + @return The lower 32-bit value written to the MSR. + +**/ +UINT32 +EFIAPI +AsmMsrAnd32 ( + IN UINT32 Index, + IN UINT32 AndData + ) +{ + return (UINT32)AsmMsrAnd64 (Index, AndData); +} + +/** + Reads a 64-bit MSR, performs a bitwise AND followed by a bitwise inclusive OR + on the lower 32-bits, and writes the result back to the 64-bit MSR. + + Reads the 64-bit MSR specified by Index, performs a bitwise AND between the + lower 32-bits of the read result and the value specified by AndData + preserving the upper 32-bits, performs a bitwise inclusive OR between the + result of the AND operation and the value specified by OrData, and writes the + result to the 64-bit MSR specified by Address. The lower 32-bits of the value + written to the MSR is returned. No parameter checking is performed on Index, + AndData, or OrData, and some of these may cause CPU exceptions. The caller + must either guarantee that Index, AndData, and OrData are valid, or the + caller must establish proper exception handlers. This function is only + available on IA-32 and X64. + + @param Index The 32-bit MSR index to write. + @param AndData The value to AND with the read value from the MSR. + @param OrData The value to OR with the result of the AND operation. + + @return The lower 32-bit value written to the MSR. + +**/ +UINT32 +EFIAPI +AsmMsrAndThenOr32 ( + IN UINT32 Index, + IN UINT32 AndData, + IN UINT32 OrData + ) +{ + return (UINT32)AsmMsrAndThenOr64 (Index, AndData, OrData); +} + +/** + Reads a bit field of an MSR. + + Reads the bit field in the lower 32-bits of a 64-bit MSR. The bit field is + specified by the StartBit and the EndBit. The value of the bit field is + returned. The caller must either guarantee that Index 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 31, then ASSERT(). + If EndBit is greater than 31, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Index The 32-bit MSR index to read. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..31. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..31. + + @return The bit field read from the MSR. + +**/ +UINT32 +EFIAPI +AsmMsrBitFieldRead32 ( + IN UINT32 Index, + IN UINTN StartBit, + IN UINTN EndBit + ) +{ + return BitFieldRead32 (AsmReadMsr32 (Index), StartBit, EndBit); +} + +/** + Writes a bit field to an MSR. + + Writes Value to a bit field in the lower 32-bits of a 64-bit MSR. The bit + field is specified by the StartBit and the EndBit. All other bits in the + destination MSR are preserved. The lower 32-bits of the MSR written is + returned. Extra left bits in Value 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 31, then ASSERT(). + If EndBit is greater than 31, 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..31. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..31. + @param Value New value of the bit field. + + @return The lower 32-bit of the value written to the MSR. + +**/ +UINT32 +EFIAPI +AsmMsrBitFieldWrite32 ( + IN UINT32 Index, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT32 Value + ) +{ + ASSERT (EndBit < sizeof (Value) * 8); + ASSERT (StartBit <= EndBit); + return (UINT32)AsmMsrBitFieldWrite64 (Index, StartBit, EndBit, Value); +} + +/** + Reads a bit field in a 64-bit MSR, performs a bitwise 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 lower 32-bits of the value + written to the MSR are 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 31, then ASSERT(). + If EndBit is greater than 31, 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..31. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..31. + @param OrData The value to OR with the read value from the MSR. + + @return The lower 32-bit of the value written to the MSR. + +**/ +UINT32 +EFIAPI +AsmMsrBitFieldOr32 ( + IN UINT32 Index, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT32 OrData + ) +{ + ASSERT (EndBit < sizeof (OrData) * 8); + ASSERT (StartBit <= EndBit); + return (UINT32)AsmMsrBitFieldOr64 (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 lower 32-bits of the value written to the + MSR are 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 31, then ASSERT(). + If EndBit is greater than 31, 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..31. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..31. + @param AndData The value to AND with the read value from the MSR. + + @return The lower 32-bit of the value written to the MSR. + +**/ +UINT32 +EFIAPI +AsmMsrBitFieldAnd32 ( + IN UINT32 Index, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT32 AndData + ) +{ + ASSERT (EndBit < sizeof (AndData) * 8); + ASSERT (StartBit <= EndBit); + return (UINT32)AsmMsrBitFieldAnd64 (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 + lower 32-bits of the value written to the MSR are 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 31, then ASSERT(). + If EndBit is greater than 31, 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..31. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..31. + @param AndData The value to AND with the read value from the MSR. + @param OrData The value to OR with the result of the AND operation. + + @return The lower 32-bit of the value written to the MSR. + +**/ +UINT32 +EFIAPI +AsmMsrBitFieldAndThenOr32 ( + IN UINT32 Index, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT32 AndData, + IN UINT32 OrData + ) +{ + ASSERT (EndBit < sizeof (AndData) * 8); + ASSERT (StartBit <= EndBit); + return (UINT32)AsmMsrBitFieldAndThenOr64 ( + Index, + StartBit, + EndBit, + AndData, + OrData + ); +} + +/** + Reads a 64-bit MSR, performs a bitwise inclusive OR, and writes the result + back to 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. No parameter checking is performed on Index or OrData, and some of + these may cause CPU exceptions. The caller must either guarantee that Index + and OrData are valid, or the caller must establish proper exception handlers. + This function is only available on IA-32 and X64. + + @param Index The 32-bit MSR index to write. + @param OrData The value to OR with the read value from the MSR. + + @return The value written back to the MSR. + +**/ +UINT64 +EFIAPI +AsmMsrOr64 ( + IN UINT32 Index, + IN UINT64 OrData + ) +{ + return AsmWriteMsr64 (Index, AsmReadMsr64 (Index) | OrData); +} + +/** + Reads a 64-bit MSR, performs a bitwise AND, and writes the result back to 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 OrData, and writes the result to the + 64-bit MSR specified by Index. The value written to the MSR is returned. No + parameter checking is performed on Index or OrData, and some of these may + cause CPU exceptions. The caller must either guarantee that Index and OrData + are valid, or the caller must establish proper exception handlers. This + function is only available on IA-32 and X64. + + @param Index The 32-bit MSR index to write. + @param AndData The value to AND with the read value from the MSR. + + @return The value written back to the MSR. + +**/ +UINT64 +EFIAPI +AsmMsrAnd64 ( + IN UINT32 Index, + IN UINT64 AndData + ) +{ + return AsmWriteMsr64 (Index, AsmReadMsr64 (Index) & AndData); +} + +/** + Reads a 64-bit MSR, performs a bitwise AND followed by a bitwise inclusive + OR, and writes the result back to the 64-bit MSR. + + Reads the 64-bit MSR specified by Index, performs a bitwise AND between read + result and the value specified by AndData, performs a bitwise inclusive OR + between the result of the AND operation 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. No parameter checking is performed on Index, AndData, + or OrData, and some of these may cause CPU exceptions. The caller must either + guarantee that Index, AndData, and OrData are valid, or the caller must + establish proper exception handlers. This function is only available on IA-32 + and X64. + + @param Index The 32-bit MSR index to write. + @param AndData The value to AND with the read value from the MSR. + @param OrData The value to OR with the result of the AND operation. + + @return The value written back to the MSR. + +**/ +UINT64 +EFIAPI +AsmMsrAndThenOr64 ( + IN UINT32 Index, + IN UINT64 AndData, + IN UINT64 OrData + ) +{ + return AsmWriteMsr64 (Index, (AsmReadMsr64 (Index) & AndData) | OrData); +} + +/** + Reads a bit field of an MSR. + + Reads the bit field in the 64-bit MSR. The bit field is specified by the + StartBit and the EndBit. The value of the bit field is returned. The caller + must either guarantee that Index 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 read. + @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. + + @return The value written back to the MSR. + +**/ +UINT64 +EFIAPI +AsmMsrBitFieldRead64 ( + IN UINT32 Index, + IN UINTN StartBit, + IN UINTN EndBit + ) +{ + return BitFieldRead64 (AsmReadMsr64 (Index), StartBit, EndBit); +} + +/** + Writes a bit field to an MSR. + + Writes Value to a bit field in a 64-bit MSR. The bit field is specified by + the StartBit and the EndBit. All other bits in the destination MSR are + preserved. The MSR written is returned. Extra left bits in Value 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 Value New value of the bit field. + + @return The value written back to the MSR. + +**/ +UINT64 +EFIAPI +AsmMsrBitFieldWrite64 ( + 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 + ) + ); +} |