audk/MdePkg/Library/BaseLib/Ia32/WriteDr3.c

/** @file
  AsmWriteDr3 function

  Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
  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.

**/

/**
  Writes a value to Debug Register 3 (DR3).

  Writes and returns a new value to DR3. This function is only available on
  IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64.

  @param  Value The value to write to Dr3.

  @return The value written to Debug Register 3 (DR3).

**/
UINTN
EFIAPI
AsmWriteDr3 (
  IN UINTN Value
  )
{
  _asm {
    mov     eax, Value
    mov     dr3, eax
  }
}