MdePkg/Library/BaseLib/Ipf/AsmCpuMisc.s

   1 /// @file
   2 ///   Contains an implementation of CallPalProcStacked 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 CpuBreakpoint
  21 .type CpuBreakpoint, @function
  22
  23 CpuBreakpoint::
  24         break.i 0;;
  25         br.ret.dpnt    b0;;
  26
  27 .endp CpuBreakpoint
  28
  29 .proc MemoryFence
  30 .type MemoryFence, @function
  31
  32 MemoryFence::
  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 MemoryFence
  45
  46 .proc DisableInterrupts
  47 .type DisableInterrupts, @function
  48
  49 DisableInterrupts::
  50          rsm      0x4000
  51          srlz.d;;
  52          br.ret.dpnt    b0;;
  53
  54 .endp DisableInterrupts
  55
  56 .proc EnableInterrupts
  57 .type EnableInterrupts, @function
  58
  59 EnableInterrupts::
  60       ssm     0x4000
  61       srlz.d;;
  62       br.ret.dpnt    b0;;
  63
  64 .endp EnableInterrupts
  65
  66 .proc EnableDisableInterrupts
  67 .type EnableDisableInterrupts, @function
  68
  69 EnableDisableInterrupts::
  70          ssm      0x4000
  71          srlz.d;;
  72          srlz.i;;
  73          rsm      0x4000
  74          srlz.d;;
  75
  76          br.ret.dpnt    b0;;
  77
  78 .endp EnableDisableInterrupts
  79