mirror of https://github.com/acidanthera/audk.git
66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
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/** @file
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Base Reset System Library Shutdown API implementation for OVMF.
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Copyright (C) 2020, Red Hat, Inc.
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Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
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Copyright (c) 2022, Citrix Systems, Inc.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Base.h> // BIT13
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#include <Library/BaseLib.h> // CpuDeadLoop()
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#include <Library/DebugLib.h> // ASSERT()
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#include <Library/IoLib.h> // IoOr16()
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#include <Library/PciLib.h> // PciRead16()
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#include <Library/ResetSystemLib.h> // ResetShutdown()
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#include <Library/XenHypercallLib.h>
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#include <OvmfPlatforms.h> // OVMF_HOSTBRIDGE_DID
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/**
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Calling this function causes the system to enter a power state equivalent
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to the ACPI G2/S5 or G3 states.
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System shutdown should not return, if it returns, it means the system does
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not support shut down reset.
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**/
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VOID
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EFIAPI
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ResetShutdown (
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VOID
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)
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{
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UINT16 AcpiPmBaseAddress;
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UINT16 HostBridgeDevId;
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AcpiPmBaseAddress = 0;
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HostBridgeDevId = PciRead16 (OVMF_HOSTBRIDGE_DID);
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switch (HostBridgeDevId) {
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case INTEL_82441_DEVICE_ID:
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AcpiPmBaseAddress = PIIX4_PMBA_VALUE;
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break;
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case INTEL_Q35_MCH_DEVICE_ID:
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AcpiPmBaseAddress = ICH9_PMBASE_VALUE;
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break;
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default:
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{
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//
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// Fallback to using hypercall.
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// Necessary for PVH guest, but should work for HVM guest.
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//
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INTN ReturnCode;
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XEN_SCHED_SHUTDOWN ShutdownOp = {
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.Reason = XEN_SHED_SHUTDOWN_POWEROFF,
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};
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ReturnCode = XenHypercallSchedOp (XEN_SCHEDOP_SHUTDOWN, ShutdownOp);
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ASSERT (ReturnCode == 0);
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CpuDeadLoop ();
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}
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}
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IoBitFieldWrite16 (AcpiPmBaseAddress + 4, 10, 13, 0);
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IoOr16 (AcpiPmBaseAddress + 4, BIT13);
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CpuDeadLoop ();
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}
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