EdkCompatibilityPkg/Foundation/Library/Dxe/EfiDriverLib/Ipf/AsmCpuMisc.s

   1 /// @file
   2 ///   Contains an implementation of EcpEfiBreakPoint and EcpMemoryFence on Itanium-based
   3 ///   architecture.
   4 ///
   5 /// Copyright (c) 2008, Intel Corporation. All rights reserved.<BR>
   6 /// This program and the accompanying materials
   7 /// are licensed and made available under the terms and conditions of the BSD License
   8 /// which accompanies this distribution.  The full text of the license may be found at
   9 /// http://opensource.org/licenses/bsd-license.php
  10 ///
  11 /// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12 /// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13 ///
  14 /// Module Name:  AsmCpuMisc.s
  15 ///
  16 ///
  17
  18
  19 .text
  20 .proc EcpEfiBreakPoint
  21 .type EcpEfiBreakPoint, @function
  22
  23 EcpEfiBreakPoint::
  24         break.i 0;;
  25         br.ret.dpnt    b0;;
  26
  27 .endp EcpEfiBreakPoint
  28
  29 .proc EcpMemoryFence
  30 .type EcpMemoryFence, @function
  31
  32 EcpMemoryFence::
  33         mf;;    // memory access ordering
  34
  35         // do we need the mf.a also here?
  36         mf.a    // wait for any IO to complete?
  37
  38         // not sure if we need serialization here, just put it, in case...
  39
  40         srlz.d;;
  41         srlz.i;;
  42
  43         br.ret.dpnt    b0;;
  44 .endp EcpMemoryFence