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