OvmfPkg/Library/ResetSystemLib/BaseResetShutdownBhyve.c

   1 /** @file
   2   Base Reset System Library Shutdown API implementation for bhyve.
   3
   4   Copyright (C) 2020, Rebecca Cran <rebecca@bsdio.com>
   5   Copyright (C) 2020, Red Hat, Inc.
   6   Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
   7
   8   SPDX-License-Identifier: BSD-2-Clause-Patent
   9 **/
  10
  11 #include <Base.h>                   // BIT13
  12
  13 #include <IndustryStandard/Bhyve.h> // BHYVE_PM_REG
  14 #include <Library/BaseLib.h>        // CpuDeadLoop()
  15 #include <Library/IoLib.h>          // IoOr16()
  16 #include <Library/ResetSystemLib.h> // ResetShutdown()
  17
  18 /**
  19   Calling this function causes the system to enter a power state equivalent
  20   to the ACPI G2/S5 or G3 states.
  21
  22   System shutdown should not return, if it returns, it means the system does
  23   not support shut down reset.
  24 **/
  25 VOID
  26 EFIAPI
  27 ResetShutdown (
  28   VOID
  29   )
  30 {
  31   IoBitFieldWrite16 (BHYVE_PM_REG, 10, 13, 5);
  32   IoOr16 (BHYVE_PM_REG, BIT13);
  33   CpuDeadLoop ();
  34 }