ArmPkg/Library/ArmSmcPsciResetSystemLib/AArch64/Reset.asm

   1 ;/** @file
   2 ;  ResetSystemLib implementation using PSCI calls
   3 ;
   4 ;  Copyright (c) 2018, Linaro Ltd. All rights reserved.<BR>
   5 ;
   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 ;**/
  15
  16   AREA Reset, CODE, READONLY
  17
  18   EXPORT DisableMmuAndReenterPei
  19   IMPORT ArmDisableMmu
  20
  21 DisableMmuAndReenterPei
  22   stp   x29, x30, [sp, #-16]!
  23   mov   x29, sp
  24
  25   bl    ArmDisableMmu
  26
  27   ; no memory accesses after MMU and caches have been disabled
  28
  29   movl  x0, FixedPcdGet64 (PcdFvBaseAddress)
  30   blr   x0
  31
  32   ; never returns
  33   nop
  34
  35   END