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
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
/** @file
PEI Services Table Pointer Library.
This library is used for PEIM which does executed from flash device directly but
executed in memory.
Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
Portiions copyrigth (c) 2011, Apple Inc. All rights reserved.
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php.
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <PiPei.h>
#include <Library/PeiServicesTablePointerLib.h>
#include <Library/DebugLib.h>
#include <Ppi/MemoryDiscovered.h>
CONST EFI_PEI_SERVICES **gPeiServices = NULL;
/**
Caches a pointer PEI Services Table.
Caches the pointer to the PEI Services Table specified by PeiServicesTablePointer
in a CPU specific manner as specified in the CPU binding section of the Platform Initialization
Pre-EFI Initialization Core Interface Specification.
If PeiServicesTablePointer is NULL, then ASSERT().
@param PeiServicesTablePointer The address of PeiServices pointer.
**/
VOID
EFIAPI
SetPeiServicesTablePointer (
IN CONST EFI_PEI_SERVICES ** PeiServicesTablePointer
)
{
ASSERT (PeiServicesTablePointer != NULL);
ASSERT (*PeiServicesTablePointer != NULL);
gPeiServices = PeiServicesTablePointer;
}
/**
Retrieves the cached value of the PEI Services Table pointer.
Returns the cached value of the PEI Services Table pointer in a CPU specific manner
as specified in the CPU binding section of the Platform Initialization Pre-EFI
Initialization Core Interface Specification.
If the cached PEI Services Table pointer is NULL, then ASSERT().
@return The pointer to PeiServices.
**/
CONST EFI_PEI_SERVICES **
EFIAPI
GetPeiServicesTablePointer (
VOID
)
{
ASSERT (gPeiServices != NULL);
ASSERT (*gPeiServices != NULL);
return gPeiServices;
}
/**
Notification service to be called when gEmuThunkPpiGuid is installed.
@param PeiServices Indirect reference to the PEI Services Table.
@param NotifyDescriptor Address of the notification descriptor data structure. Type
EFI_PEI_NOTIFY_DESCRIPTOR is defined above.
@param Ppi Address of the PPI that was installed.
@retval EFI_STATUS This function will install a PPI to PPI database. The status
code will be the code for (*PeiServices)->InstallPpi.
**/
EFI_STATUS
EFIAPI
PeiServicesTablePointerNotifyCallback (
IN EFI_PEI_SERVICES **PeiServices,
IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDescriptor,
IN VOID *Ppi
)
{
gPeiServices = (CONST EFI_PEI_SERVICES **)PeiServices;
return EFI_SUCCESS;
}
EFI_PEI_NOTIFY_DESCRIPTOR mNotifyOnThunkList = {
(EFI_PEI_PPI_DESCRIPTOR_NOTIFY_CALLBACK | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
&gEfiPeiMemoryDiscoveredPpiGuid,
PeiServicesTablePointerNotifyCallback
};
/**
Constructor register notification on when PPI updates. If PPI is
alreay installed registering the notify will cause the handle to
run.
@param FileHandle The handle of FFS header the loaded driver.
@param PeiServices The pointer to the PEI services.
@retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
**/
EFI_STATUS
EFIAPI
PeiServicesTablePointerLibConstructor (
IN EFI_PEI_FILE_HANDLE FileHandle,
IN CONST EFI_PEI_SERVICES **PeiServices
)
{
EFI_STATUS Status;
gPeiServices = (CONST EFI_PEI_SERVICES **)PeiServices;
// register to be told when PeiServices pointer is updated
Status = (*PeiServices)->NotifyPpi (PeiServices, &mNotifyOnThunkList);
ASSERT_EFI_ERROR (Status);
return Status;
}
|
