ArmPkg/Library/ArmSmcPsciResetSystemLib/AArch64/Reset.S

   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 #include <AsmMacroIoLibV8.h>
  17
  18 ASM_FUNC(DisableMmuAndReenterPei)
  19   stp   x29, x30, [sp, #-16]!
  20   mov   x29, sp
  21
  22   bl    ArmDisableMmu
  23
  24   // no memory accesses after MMU and caches have been disabled
  25
  26   MOV64 (x0, FixedPcdGet64 (PcdFvBaseAddress))
  27   blr   x0
  28
  29   // never returns
  30   nop