ArmPkg/Include/Library/ArmSmcLib.h

   1 /** @file
   2 *
   3 *  Copyright (c) 2012-2014, ARM Limited. All rights reserved.
   4 *
   5 *  SPDX-License-Identifier: BSD-2-Clause-Patent
   6 *
   7 **/
   8
   9 #ifndef ARM_SMC_LIB_H_
  10 #define ARM_SMC_LIB_H_
  11
  12 /**
  13  * The size of the SMC arguments are different between AArch64 and AArch32.
  14  * The native size is used for the arguments.
  15  */
  16 typedef struct {
  17   UINTN    Arg0;
  18   UINTN    Arg1;
  19   UINTN    Arg2;
  20   UINTN    Arg3;
  21   UINTN    Arg4;
  22   UINTN    Arg5;
  23   UINTN    Arg6;
  24   UINTN    Arg7;
  25 } ARM_SMC_ARGS;
  26
  27 /**
  28   Trigger an SMC call
  29
  30   SMC calls can take up to 7 arguments and return up to 4 return values.
  31   Therefore, the 4 first fields in the ARM_SMC_ARGS structure are used
  32   for both input and output values.
  33
  34 **/
  35 VOID
  36 ArmCallSmc (
  37   IN OUT ARM_SMC_ARGS  *Args
  38   );
  39
  40 #endif // ARM_SMC_LIB_H_