blob: ffd43dc549c50f20cb3c90f5f4013e546722915f (
plain)
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
78
79
80
81
82
83
84
|
/** @file -- VariablePolicyExtraInitRuntimeDxe.c
This file contains extra init and deinit routines that register and unregister
VariableAddressChange callbacks.
Copyright (c) Microsoft Corporation.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
extern EFI_GET_VARIABLE mGetVariableHelper;
extern UINT8 *mPolicyTable;
STATIC BOOLEAN mIsVirtualAddrConverted;
STATIC EFI_EVENT mVariablePolicyLibVirtualAddressChangeEvent = NULL;
/**
For the RuntimeDxe version of this lib, convert internal pointer addresses to virtual addresses.
@param[in] Event Event whose notification function is being invoked.
@param[in] Context The pointer to the notification function's context, which
is implementation-dependent.
**/
STATIC
VOID
EFIAPI
VariablePolicyLibVirtualAddressCallback (
IN EFI_EVENT Event,
IN VOID *Context
)
{
gRT->ConvertPointer (0, (VOID **)&mPolicyTable);
gRT->ConvertPointer (0, (VOID **)&mGetVariableHelper);
mIsVirtualAddrConverted = TRUE;
}
/**
An extra init hook that enables the RuntimeDxe library instance to
register VirtualAddress change callbacks. Among other things.
@retval EFI_SUCCESS Everything is good. Continue with init.
@retval Others Uh... don't continue.
**/
EFI_STATUS
VariablePolicyExtraInit (
VOID
)
{
return gBS->CreateEventEx (
EVT_NOTIFY_SIGNAL,
TPL_NOTIFY,
VariablePolicyLibVirtualAddressCallback,
NULL,
&gEfiEventVirtualAddressChangeGuid,
&mVariablePolicyLibVirtualAddressChangeEvent
);
}
/**
An extra deinit hook that enables the RuntimeDxe library instance to
register VirtualAddress change callbacks. Among other things.
@retval EFI_SUCCESS Everything is good. Continue with deinit.
@retval Others Uh... don't continue.
**/
EFI_STATUS
VariablePolicyExtraDeinit (
VOID
)
{
EFI_STATUS Status;
Status = EFI_SUCCESS;
if (mIsVirtualAddrConverted) {
Status = gBS->CloseEvent (mVariablePolicyLibVirtualAddressChangeEvent);
} else {
Status = EFI_SUCCESS;
}
return Status;
}
|
