[mirror_edk2.git] / MdePkg / Library / BaseLib / X64 / WriteMsr64.c

/** @file\r
  CpuBreakpoint function.\r
\r
  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
/**\r
  Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics.\r
**/\r
\r
void __writemsr (unsigned long Register, unsigned __int64 Value);\r
\r
#pragma intrinsic(__writemsr)\r
\r
/**\r
  Write data to MSR.\r
\r
  @param  Index                The register index of MSR.\r
  @param  Value                Data wants to be written.\r
\r
  @return Value written to MSR.\r
\r
**/\r
UINT64\r
EFIAPI\r
AsmWriteMsr64 (\r
  IN UINT32  Index,\r
  IN UINT64  Value\r
  )\r
{\r
  __writemsr (Index, Value);\r
  return Value;\r
}\r
\r
Commit	Line	Data
f1baef62	1	/** @file\r
	2	CpuBreakpoint function.\r
	3	\r
127010dd	4	Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r
9344f092	5	SPDX-License-Identifier: BSD-2-Clause-Patent\r
f1baef62	6	\r
	7	**/\r
	8	\r
42eedea9	9	/**\r
	10	Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics.\r
	11	**/\r
7e43ed89	12	\r
f1baef62	13	void __writemsr (unsigned long Register, unsigned __int64 Value);\r
	14	\r
	15	#pragma intrinsic(__writemsr)\r
	16	\r
42eedea9	17	/**\r
	18	Write data to MSR.\r
	19	\r
127010dd	20	@param Index The register index of MSR.\r
42eedea9	21	@param Value Data wants to be written.\r
	22	\r
	23	@return Value written to MSR.\r
	24	\r
	25	**/\r
f1baef62	26	UINT64\r
	27	EFIAPI\r
	28	AsmWriteMsr64 (\r
	29	IN UINT32 Index,\r
	30	IN UINT64 Value\r
	31	)\r
	32	{\r
	33	__writemsr (Index, Value);\r
	34	return Value;\r
	35	}\r
	36	\r