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UefiCpuPkg/RegisterCpuFeaturesLib: Add "Test Then Write" Macros.

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REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2040

Add below new micros which test the current value before write the new
value. Only write new value when current value not same as new value.
  CPU_REGISTER_TABLE_TEST_THEN_WRITE32
  CPU_REGISTER_TABLE_TEST_THEN_WRITE64
  CPU_REGISTER_TABLE_TEST_THEN_WRITE_FIELD

Also add below API:
  CpuRegisterTableTestThenWrite

Signed-off-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Cc: Star Zeng <star.zeng@intel.com>
This commit is contained in:
Dong, Eric
2019-08-16 11:57:25 +08:00
committed by Ray Ni
parent 4201098e97
commit 35c2809ba6
3 changed files with 134 additions and 4 deletions
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91
UefiCpuPkg/Include/Library/RegisterCpuFeaturesLib.h
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@@ -348,6 +348,32 @@ CpuRegisterTableWrite (
IN UINT64 Value
);
/**
Adds an entry in specified register table.
This function adds an entry in specified register table, with given register type,
register index, bit section and value.
Driver will test the current value before setting new value.
@param[in] ProcessorNumber The index of the CPU to add a register table entry
@param[in] RegisterType Type of the register to program
@param[in] Index Index of the register to program
@param[in] ValueMask Mask of bits in register to write
@param[in] Value Value to write
@note This service could be called by BSP only.
**/
VOID
EFIAPI
CpuRegisterTableTestThenWrite (
IN UINTN ProcessorNumber,
IN REGISTER_TYPE RegisterType,
IN UINT64 Index,
IN UINT64 ValueMask,
IN UINT64 Value
);
/**
Adds an entry in specified Pre-SMM register table.
@@ -390,6 +416,26 @@ PreSmmCpuRegisterTableWrite (
CpuRegisterTableWrite (ProcessorNumber, RegisterType, Index, MAX_UINT32, Value); \
} while(FALSE);
/**
Adds a 32-bit register write entry in specified register table.
This macro adds an entry in specified register table, with given register type,
register index, and value.
Driver will test the current value before setting new value.
@param[in] ProcessorNumber The index of the CPU to add a register table entry.
@param[in] RegisterType Type of the register to program
@param[in] Index Index of the register to program
@param[in] Value Value to write
@note This service could be called by BSP only.
**/
#define CPU_REGISTER_TABLE_TEST_THEN_WRITE32(ProcessorNumber, RegisterType, Index, Value) \
do { \
CpuRegisterTableTestThenWrite (ProcessorNumber, RegisterType, Index, MAX_UINT32, Value); \
} while(FALSE);
/**
Adds a 64-bit register write entry in specified register table.
@@ -408,6 +454,26 @@ PreSmmCpuRegisterTableWrite (
CpuRegisterTableWrite (ProcessorNumber, RegisterType, Index, MAX_UINT64, Value); \
} while(FALSE);
/**
Adds a 64-bit register write entry in specified register table.
This macro adds an entry in specified register table, with given register type,
register index, and value.
Driver will test the current value before setting new value.
@param[in] ProcessorNumber The index of the CPU to add a register table entry.
@param[in] RegisterType Type of the register to program
@param[in] Index Index of the register to program
@param[in] Value Value to write
@note This service could be called by BSP only.
**/
#define CPU_REGISTER_TABLE_TEST_THEN_WRITE64(ProcessorNumber, RegisterType, Index, Value) \
do { \
CpuRegisterTableTestThenWrite (ProcessorNumber, RegisterType, Index, MAX_UINT64, Value); \
} while(FALSE);
/**
Adds a bit field write entry in specified register table.
@@ -431,6 +497,31 @@ PreSmmCpuRegisterTableWrite (
CpuRegisterTableWrite (ProcessorNumber, RegisterType, Index, ~ValueMask, Value); \
} while(FALSE);
/**
Adds a bit field write entry in specified register table.
This macro adds an entry in specified register table, with given register type,
register index, bit field section, and value.
Driver will test the current value before setting new value.
@param[in] ProcessorNumber The index of the CPU to add a register table entry.
@param[in] RegisterType Type of the register to program.
@param[in] Index Index of the register to program.
@param[in] Type The data type name of a register structure.
@param[in] Field The bit fiel name in register structure to write.
@param[in] Value Value to write to the bit field.
@note This service could be called by BSP only.
**/
#define CPU_REGISTER_TABLE_TEST_THEN_WRITE_FIELD(ProcessorNumber, RegisterType, Index, Type, Field, Value) \
do { \
UINT64 ValueMask; \
ValueMask = MAX_UINT64; \
((Type *)(&ValueMask))->Field = 0; \
CpuRegisterTableTestThenWrite (ProcessorNumber, RegisterType, Index, ~ValueMask, Value); \
} while(FALSE);
/**
Adds a 32-bit register write entry in specified register table.