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 ;  SPDX-License-Identifier: BSD-2-Clause-Patent
   7 ;
   8 ;**/
   9
  10   AREA Reset, CODE, READONLY
  11
  12   EXPORT DisableMmuAndReenterPei
  13   IMPORT ArmDisableMmu
  14
  15 DisableMmuAndReenterPei
  16   stp   x29, x30, [sp, #-16]!
  17   mov   x29, sp
  18
  19   bl    ArmDisableMmu
  20
  21   ; no memory accesses after MMU and caches have been disabled
  22
  23   movl  x0, FixedPcdGet64 (PcdFvBaseAddress)
  24   blr   x0
  25
  26   ; never returns
  27   nop
  28
  29   END