MdeModulePkg/Core/Pei/Ipf/SwitchStack.s

   1 /// @file
   2 ///  IPF specific SwitchStack() function
   3 ///
   4 /// Copyright (c) 2006, Intel Corporation
   5 /// All rights reserved. This program and the accompanying materials
   6 /// are licensed and made available under the terms and conditions of the BSD License
   7 /// which accompanies this distribution.  The full text of the license may be found at
   8 /// http://opensource.org/licenses/bsd-license.php
   9 ///
  10 /// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 /// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12 ///
  13 /// Module Name: SwitchStack.s
  14 ///
  15 ///
  16
  17 .auto
  18 .text
  19
  20 .proc   IpfAsmSwitchStack
  21 .type   IpfAsmSwitchStack, @function
  22 .regstk 6, 0, 0, 0
  23 IpfAsmSwitchStack::
  24         mov                 r14 = ar.rsc
  25         movl                r2  = ~((((1 << 14) - 1) << 16) | 3)
  26
  27         mov                 r17 = in1
  28         mov                 r18 = in2
  29         mov                 r19 = in3
  30         and                 r2  = r14, r2
  31
  32         mov                 ar.rsc = r2
  33         mov                 sp  = in4
  34         mov                 r20 = in5
  35
  36         ld8.nt1             r16 = [in0], 8
  37         ld8.nta             gp  = [in0]
  38         mov                 r3  = -1
  39
  40         loadrs
  41         mov                 ar.bspstore = r20
  42         mov                 b7  = r16
  43
  44         alloc               r2  = ar.pfs, 0, 0, 3, 0
  45         mov                 out0 = r17
  46         mov                 out1 = r18
  47         mov                 out2 = r19
  48
  49         mov                 ar.rnat = r3
  50         mov                 ar.rsc = r14
  51         br.call.sptk.many   b0  = b7
  52 .endp   IpfAsmSwitchStack