OvmfPkg: Add BaseResetSystemLibBhyve

[mirror_edk2.git] / OvmfPkg / Library / ResetSystemLib / BaseResetShutdownBhyve.c

/** @file\r
  Base Reset System Library Shutdown API implementation for bhyve.\r
\r
  Copyright (C) 2020, Rebecca Cran <rebecca@bsdio.com>\r
  Copyright (C) 2020, Red Hat, Inc.\r
  Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>\r
\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
**/\r
\r
#include <Base.h>                   // BIT13\r
\r
#include <IndustryStandard/Bhyve.h> // BHYVE_PM_REG\r
#include <Library/BaseLib.h>        // CpuDeadLoop()\r
#include <Library/IoLib.h>          // IoOr16()\r
#include <Library/ResetSystemLib.h> // ResetShutdown()\r
\r
/**\r
  Calling this function causes the system to enter a power state equivalent\r
  to the ACPI G2/S5 or G3 states.\r
\r
  System shutdown should not return, if it returns, it means the system does\r
  not support shut down reset.\r
**/\r
VOID\r
EFIAPI\r
ResetShutdown (\r
  VOID\r
  )\r
{\r
  IoBitFieldWrite16 (BHYVE_PM_REG, 10, 13, 5);\r
  IoOr16 (BHYVE_PM_REG, BIT13);\r
  CpuDeadLoop ();\r
}\r