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
|
/*++
Copyright (c) 2004, Intel Corporation
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.
Module Name:
VariableStore.h
Abstract:
Revision History
--*/
#ifndef _VARIABLE_STORE_H
#define _VARIABLE_STORE_H
//
// The variable store protocol interface is specific to the reference
// implementation. The initialization code adds variable store devices
// to the system, and the FW connects to the devices to provide the
// variable store interfaces through these devices.
//
//
// Variable Store Device protocol
//
#define EFI_VARIABLE_STORE_PROTOCOL_GUID \
{ 0xf088cd91, 0xa046, 0x11d2, 0x8e, 0x42, 0x0, 0xa0, 0xc9, 0x69, 0x72, 0x3b }
EFI_FORWARD_DECLARATION (EFI_VARIABLE_STORE_PROTOCOL);
typedef
EFI_STATUS
(EFIAPI *EFI_CLEAR_STORE) (
IN EFI_VARIABLE_STORE_PROTOCOL *This,
IN OUT VOID *Scratch
);
typedef
EFI_STATUS
(EFIAPI *EFI_READ_STORE) (
IN EFI_VARIABLE_STORE_PROTOCOL *This,
IN UINTN Offset,
IN UINTN BufferSize,
OUT VOID *Buffer
);
typedef
EFI_STATUS
(EFIAPI *EFI_UPDATE_STORE) (
IN EFI_VARIABLE_STORE_PROTOCOL *This,
IN UINTN Offset,
IN UINTN BufferSize,
IN VOID *Buffer
);
typedef
EFI_STATUS
(EFIAPI *EFI_CLEANUP_STORE) (
IN EFI_VARIABLE_STORE_PROTOCOL *This
);
typedef struct _EFI_VARIABLE_STORE_PROTOCOL {
//
// Number of banks and bank size
//
UINT32 Attributes;
UINT32 BankSize;
//
// Functions to access the storage banks
//
EFI_CLEAR_STORE ClearStore;
EFI_READ_STORE ReadStore;
EFI_UPDATE_STORE UpdateStore;
EFI_CLEANUP_STORE CleanupStore;
} EFI_VARIABLE_STORE_PROTOCOL;
//
//
// ClearStore() - A function to clear the requested storage bank. A cleared
// bank contains all "on" bits.
//
// ReadStore() - Read data from the requested store.
//
// UpdateStore() - Updates data on the requested store. The FW will only
// ever issue updates to clear bits in the store. Updates must
// be performed in LSb to MSb order of the update buffer.
//
// CleanupStore() - Do garbage collection and reclaim operation.
//
extern EFI_GUID gEfiVariableStoreProtocolGuid;
#endif // _VARIABLE_STORE_H
|
