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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
/*++
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:
Ebc.h
Abstract:
Describes the protocol interface to the EBC interpreter.
--*/
#ifndef _EBC_H_
#define _EBC_H_
#define EFI_EBC_INTERPRETER_PROTOCOL_GUID \
{ \
0x13AC6DD1, 0x73D0, 0x11D4, 0xB0, 0x6B, 0x00, 0xAA, 0x00, 0xBD, 0x6D, 0xE7 \
}
//
// Define for forward reference.
//
EFI_FORWARD_DECLARATION (EFI_EBC_PROTOCOL);
/*++
Routine Description:
Create a thunk for an image entry point. In short, given the physical address
of the entry point for a loaded image, create a thunk that does some
fixup of arguments (and perform any other necessary overhead) and then
calls the original entry point. The caller can then use the returned pointer
to the created thunk as the new entry point to image.
Arguments:
This - protocol instance pointer
ImageHandle - handle to the image. The EBC interpreter may use this to keep
track of any resource allocations performed in loading and
executing the image.
EbcEntryPoint - the entry point for the image (as defined in the file header)
Thunk - pointer to thunk pointer where the address of the created
thunk is returned.
Returns:
Standard EFI_STATUS
--*/
typedef
EFI_STATUS
(EFIAPI *EFI_EBC_CREATE_THUNK) (
IN EFI_EBC_PROTOCOL * This,
IN EFI_HANDLE ImageHandle,
IN VOID *EbcEntryPoint,
OUT VOID **Thunk
);
/*++
Routine Description:
Perform any cleanup necessary when an image is unloaded. Basically it gives
the EBC interpreter the chance to free up any resources allocated during
load and execution of an EBC image.
Arguments:
This - protocol instance pointer
ImageHandle - the handle of the image being unloaded.
Returns:
Standard EFI_STATUS.
--*/
typedef
EFI_STATUS
(EFIAPI *EFI_EBC_UNLOAD_IMAGE) (
IN EFI_EBC_PROTOCOL * This,
IN EFI_HANDLE ImageHandle
);
/*++
Routine Description:
The I-Cache-flush registration service takes a pointer to a function to
call to flush the I-Cache. Here's the prototype for that function pointer.
Arguments:
Start - physical start address of CPU instruction cache to flush.
Length - how many bytes to flush of the instruction cache.
Returns:
Standard EFI_STATUS.
--*/
typedef
EFI_STATUS
(EFIAPI *EBC_ICACHE_FLUSH) (
IN EFI_PHYSICAL_ADDRESS Start,
IN UINT64 Length
);
/*++
Routine Description:
This routine is called by the core firmware to provide the EBC driver with
a function to call to flush the CPU's instruction cache following creation
of a thunk. It is not required.
Arguments:
This - protocol instance pointer
Flush - pointer to the function to call to flush the CPU instruction
cache.
Returns:
Standard EFI_STATUS.
--*/
typedef
EFI_STATUS
(EFIAPI *EFI_EBC_REGISTER_ICACHE_FLUSH) (
IN EFI_EBC_PROTOCOL * This,
IN EBC_ICACHE_FLUSH Flush
);
/*++
Routine Description:
This routine can be called to get the VM revision. It returns the same
value as the EBC BREAK 1 instruction returns.
Arguments:
This - protocol instance pointer
Version - pointer to where to return the VM version
Returns:
Standard EFI_STATUS.
--*/
typedef
EFI_STATUS
(EFIAPI *EFI_EBC_GET_VERSION) (
IN EFI_EBC_PROTOCOL * This,
IN OUT UINT64 *Version
);
//
// Prototype for the actual EBC protocol interface
//
typedef struct _EFI_EBC_PROTOCOL {
EFI_EBC_CREATE_THUNK CreateThunk;
EFI_EBC_UNLOAD_IMAGE UnloadImage;
EFI_EBC_REGISTER_ICACHE_FLUSH RegisterICacheFlush;
EFI_EBC_GET_VERSION GetVersion;
} EFI_EBC_PROTOCOL;
//
// Extern the global EBC protocol GUID
//
extern EFI_GUID gEfiEbcProtocolGuid;
#endif
|
