UefiCpuPkg: Move AsmRelocateApLoopStart from Mpfuncs.nasm to AmdSev.nasm

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

/** @file\r
  Base Reset System Library Shutdown API implementation for OVMF.\r
\r
  Copyright (C) 2020, Red Hat, Inc.\r
  Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
**/\r
\r
#include <Base.h>                   // BIT13\r
\r
#include <Library/BaseLib.h>        // CpuDeadLoop()\r
#include <Library/DebugLib.h>       // ASSERT()\r
#include <Library/IoLib.h>          // IoOr16()\r
#include <Library/PciLib.h>         // PciRead16()\r
#include <Library/ResetSystemLib.h> // ResetShutdown()\r
#include <OvmfPlatforms.h>          // OVMF_HOSTBRIDGE_DID\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
  UINT16  AcpiPmBaseAddress;\r
  UINT16  HostBridgeDevId;\r
\r
  AcpiPmBaseAddress = 0;\r
  HostBridgeDevId   = PciRead16 (OVMF_HOSTBRIDGE_DID);\r
  switch (HostBridgeDevId) {\r
    case INTEL_82441_DEVICE_ID:\r
      AcpiPmBaseAddress = PIIX4_PMBA_VALUE;\r
      break;\r
    case INTEL_Q35_MCH_DEVICE_ID:\r
      AcpiPmBaseAddress = ICH9_PMBASE_VALUE;\r
      break;\r
    case CLOUDHV_DEVICE_ID:\r
      IoWrite8 (CLOUDHV_ACPI_SHUTDOWN_IO_ADDRESS, 5 << 2 | 1 << 5);\r
      CpuDeadLoop ();\r
    default:\r
      ASSERT (FALSE);\r
      CpuDeadLoop ();\r
  }\r
\r
  IoBitFieldWrite16 (AcpiPmBaseAddress + 4, 10, 13, 0);\r
  IoOr16 (AcpiPmBaseAddress + 4, BIT13);\r
  CpuDeadLoop ();\r
}\r