1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
/** @file
DXE Reset System Library Shutdown API implementation for OVMF.
Copyright (C) 2020, Red Hat, Inc.
Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Base.h> // BIT13
#include <IndustryStandard/Xen/sched.h>
#include <Library/BaseLib.h> // CpuDeadLoop()
#include <Library/DebugLib.h> // ASSERT()
#include <Library/IoLib.h> // IoOr16()
#include <Library/PcdLib.h> // PcdGet16()
#include <Library/ResetSystemLib.h> // ResetShutdown()
#include <Library/XenHypercallLib.h>
#include <OvmfPlatforms.h> // PIIX4_PMBA_VALUE
STATIC UINT16 mAcpiPmBaseAddress;
EFI_STATUS
EFIAPI
DxeResetInit (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
UINT16 HostBridgeDevId;
HostBridgeDevId = PcdGet16 (PcdOvmfHostBridgePciDevId);
switch (HostBridgeDevId) {
case INTEL_82441_DEVICE_ID:
mAcpiPmBaseAddress = PIIX4_PMBA_VALUE;
break;
case INTEL_Q35_MCH_DEVICE_ID:
mAcpiPmBaseAddress = ICH9_PMBASE_VALUE;
break;
default:
//
// Fallback to using hypercall.
// Necessary for PVH guest, but should work for HVM guest.
//
mAcpiPmBaseAddress = 0xffff;
break;
}
return EFI_SUCCESS;
}
/**
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
)
{
if (mAcpiPmBaseAddress != 0xffff) {
IoBitFieldWrite16 (mAcpiPmBaseAddress + 4, 10, 13, 0);
IoOr16 (mAcpiPmBaseAddress + 4, BIT13);
} else {
INTN ReturnCode;
XEN_SCHED_SHUTDOWN ShutdownOp = {
.Reason = XEN_SHED_SHUTDOWN_POWEROFF,
};
ReturnCode = XenHypercallSchedOp (XEN_SCHEDOP_SHUTDOWN, &ShutdownOp);
ASSERT (ReturnCode == 0);
}
CpuDeadLoop ();
}
|
