EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/Ia32/EfiSetMemRep1.c

   1 /*++
   2
   3 Copyright (c) 2007, Intel Corporation. All rights reserved.<BR>
   4 This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 Module Name:
  13
  14   EfiSetMemRep1.c
  15
  16 Abstract:
  17
  18   This is the code that uses rep stosb SetMem service
  19
  20 --*/
  21
  22 #include "Tiano.h"
  23
  24 VOID
  25 EfiCommonLibSetMem (
  26   IN VOID   *Buffer,
  27   IN UINTN  Count,
  28   IN UINT8  Value
  29   )
  30 /*++
  31
  32 Input:  VOID   *Buffer - Pointer to buffer to write
  33         UINTN  Count   - Number of bytes to write
  34         UINT8  Value   - Value to write
  35
  36 Output: None.
  37
  38 Saves:
  39
  40 Modifies:
  41
  42 Description:  This function uses rep stosb to set memory.
  43
  44 --*/
  45 {
  46   __asm {
  47     mov         ecx, Count
  48     test        ecx, ecx
  49     je          Exit
  50     mov         al,  Value
  51     mov         edi, Buffer
  52     rep stosb
  53 Exit:
  54   }
  55 }
  56