ArmPkg/Include/Library/ArmHvcLib.h

   1 /** @file
   2 *
   3 *  Copyright (c) 2012-2014, ARM Limited. All rights reserved.
   4 *
   5 *  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 **/
  14
  15 #ifndef __ARM_HVC_LIB__
  16 #define __ARM_HVC_LIB__
  17
  18 /**
  19  * The size of the HVC arguments are different between AArch64 and AArch32.
  20  * The native size is used for the arguments.
  21  */
  22 typedef struct {
  23   UINTN  Arg0;
  24   UINTN  Arg1;
  25   UINTN  Arg2;
  26   UINTN  Arg3;
  27   UINTN  Arg4;
  28   UINTN  Arg5;
  29   UINTN  Arg6;
  30   UINTN  Arg7;
  31 } ARM_HVC_ARGS;
  32
  33 /**
  34   Trigger an HVC call
  35
  36   HVC calls can take up to 8 arguments and return up to 4 return values.
  37   Therefore, the 4 first fields in the ARM_HVC_ARGS structure are used
  38   for both input and output values.
  39
  40 **/
  41 VOID
  42 ArmCallHvc (
  43   IN OUT ARM_HVC_ARGS *Args
  44   );
  45
  46 #endif