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
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
/*
* gbe/gbe.h
* This file is part of the ich9deblob utility from the libreboot project
*
* Copyright (C) 2014 Steve Shenton <sgsit@libreboot.org>
* Francis Rowe <info@gluglug.org.uk>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Purpose: provide struct representing gbe region.
* Map actual buffers of this regions, directly to instances of these
* structs. This makes working with gbe really easy.
*/
/*
* bit fields used, corresponding to datasheet. See links to datasheets
* and documentation in ich9deblob.c
*/
#ifndef GBESTRUCT_H
#define GBESTRUCT_H
#include <stdio.h>
#include <string.h>
/* Size of the full gbe region in bytes */
#define GBEREGIONSIZE_8K 0x2000
/*
* Size of each sub-region in gbe.
* gbe contains two regions which
* can be identical: main and backup.
* These are each half the size of the full region
*/
#define GBEREGIONSIZE_4K 0x1000
/*
* When adding up the first 0x3F 16-bit words
* in a 4KiB GBE region, it should be equal
* to 0xBABA
*/
#define GBECHECKSUMTOTAL 0xBABA
/*
* These will have a modified descriptor+gbe based on what's in the factory.rom
* These will be joined into a single 12KiB buffer (descriptor, then gbe) and saved to a file
* NOTE: The GBE region of 8K is actually 2x 4K regions in a single region; both 4K blocks can be identical (and by default, are)
* The 2nd one is a "backup", but we don't know when it's used. perhaps it's used when the checksum on the first one does not match?
*/
/*
* ---------------------------------------------------------------------
* Gbe struct representing the data:
* ---------------------------------------------------------------------
*/
struct GBE_RESERVED_WORD_03H {
/* least significant bits */
unsigned short reserved1 : 11; /* bits should all be set to zero */
unsigned char ibaLom : 1; /* set to 1 for intel boot agent to work (i.e. set it to 0) */
unsigned char reserved2 : 4; /* bits should all be set to zero */
/* most significant bits */
};
/* Word 0A */
struct GBE_PCI_INITIALIZATION_CONTROL_WORD {
/* least significant bits */
unsigned char loadVendorDeviceId : 1; /* 1 = load from NVM. 0 = load from MAC fuses. It's 1 in my deblobbed_descriptor.bin */
unsigned char loadSubsystemId : 1; /* 1 = load from NVM. 0 = load from MAC fuses. It's 1 in my deblobbed_descriptor.bin */
unsigned char reserved1 : 1; /* Reserved. Set to 0 (according to datasheet). 0 in my deblobbed_descriptor.bin */
unsigned char reserved2 : 3; /* Reserved. Set them to 0 (according to datasheet). 0 in my deblobbed_descriptor.bin */
unsigned char pmEnable : 1; /* Power Management Enable. 1=Enable. It's 1 in my deblobbed_descriptor.bin */
unsigned char auxPwr : 1; /* Auxiliary Power Indication. See datasheet. it's 1 in my deblobbed_descriptor.bin */
unsigned char reserved3 : 4; /* Reserved. Set to 0000 (according to datasheet). */
unsigned char reserved4 : 4; /* Reserved. Set to 0001 (according to datasheet). */
/* most significant bits */
};
/* Word 10h. */
struct GBE_LAN_POWER_CONSUMPTION {
/* least significant bits */
unsigned char lanD3Power : 5; /* It's 00001b (0x1) in deblobbed_descriptor.bin */
unsigned char reserved : 3; /* Reserved. These bits should all be 0. confirmed from deblobbed_descriptor.bin */
unsigned char lanD0Power : 8; /* default value: 0x0D (according to datasheet). confirmed from deblobbed_descriptor.bin */
/* most significant bits */
};
struct GBEREGIONRECORD_4K {
unsigned char macAddress[6]; /* Word 00 to 02 */
struct GBE_RESERVED_WORD_03H reservedWord03h; /* Reserved word 03. */
unsigned short reservedWord04h; /* Reserved word 04: set it to 0xFFFF (according to datasheet) */
unsigned short reservedWord05h; /* Reserved word 05: 83 10 (little endian) in my deblobbed_descriptor.bin. Set this to 0x1083 (in C, assuming little endian byte order). "cannot be changed" according to datasheet */
unsigned short reservedWords06h07h[2]; /* Reserved words 06-07: set both to 0xFFFF (according to datasheet) */
/*
* Word 08 and 09 (pba low and pba high):
*
* Both of these should be set to 0xFFFF by default, according to the datasheet.
* "nine digit printed board assembly (PBA) number" for intel cards to be stored
* in a 4 byte (read: 2 word) field.
*
* Example: if pba number is 123456-003, then word 08 should be 1234h and word 09 becomes 5603.
* Note: 1234 and 5603 above are big endian. In the image it would actually be 34 12 and 0356
*
* Example: in mine it was (in the image): 08 10 FF FF. That becomes 1008h and FFFFh, or
* basically: 1008FF-0FF. The same was observed in another.
*
* Setting it to FF FF FF FF should be fine, according to the datasheet.
*/
unsigned short pbaLow; /* Word 08. Set it to 0x1008. */
unsigned short pbaHigh; /* Word 09. Set it to 0xFFFF. */
/* Word 0A */
struct GBE_PCI_INITIALIZATION_CONTROL_WORD pciInitializationControlWord;
/*
* Word 0B; subsystem ID
*
* If load subsystem ID bit of word 0A (pci init control word) is
* set to 1 (read: it is. in my deblobbed_descriptor.bin), store
* the subsystem id here. Datasheet says that the default value is
* 0000h, but you should set this to 20EEh (little endian: EE 20)
*/
unsigned short subsystemId; /* Set this to 0x20EE */
/*
* Word 0C; subsystem vendor ID
*
* If load subsystem vendor ID bit of word 0A (pci init control word)
* is set to 1 (read: it is. in my deblobbed_descriptor.bin), store
* the subsystem vendor id here. Datasheet says that the default
* value is 8086h, but you should set this to 17AAh (lendian: AA 17).
*/
unsigned short subsystemVendorId; /* Set this to 0x17AA */
/*
* Word 0D: device ID
*
* If load vendor/device ID in word 0A (pci init control word) is 1
* (it is) then this word is used to init device id using word 21h,
* 1Eh or 1Fh. In my case, deviceId is 0x10F5. Word 21h is set to
* 0x10CB, word 1Eh is 0x10F5 and 1Fh is 0x10BF
*
* The datasheet says that 10F5 is for Intel 82567LM gigabit ethernet
* controller; 10BF is for Intel 82567LF and 10CB is for Intel 82567V.
*
* Based on this, the X200 is shown to have the Intel 82567LM ethernet
* controller.
*/
unsigned short deviceId; /* Set this to 0x10F5. */
/* It is important that this is correct, for the linux kernel driver */
/*
* Word 0E: vendor ID
*
* If load vendor/device ID in word 0A (pci init control) is 1 (it is),
* then this word used read to initialize the PCI vendor ID. Default
* value is 8086 according to datasheets, and deblobbed_descriptor.bin.
*
* Intel is often 8086 as a PCI vendor ID. Because 8086. As in the CPU architecture.
*/
unsigned short vendorId;
unsigned short deviceRevId; /* Word 0F: reserved bits. Set all bits to 0. */
struct GBE_LAN_POWER_CONSUMPTION lanPowerConsumption; /* Word 10: LAN Power Consumption (see struct definition) */
unsigned short reserved6;
unsigned short reserved7;
unsigned short sharedInitializationControlWord;
unsigned short extendedConfigurationControlWord1;
unsigned short extendedConfigurationControlWord2;
unsigned short extendedConfigurationControlWord3;
unsigned short ledCtl1;
unsigned short ledCtl02;
unsigned short reserved8;
unsigned short reserved9;
unsigned short reserved10;
unsigned short reserved11;
unsigned short reserved12;
unsigned short _82567lmDeviceId;
unsigned short _82567lfDeviceId;
unsigned short reserved13;
unsigned short _82567vDeviceId;
unsigned short reserved14;
unsigned short reserved15;
unsigned short reserved16[12];
unsigned short pxeSoftwareRegion[15];
unsigned short checkSum; /* when added to the sum of all words above, this should match GBECHECKSUMTOTAL */
unsigned char padding1[3968];
};
/* main and backup region in gbe */
struct GBEREGIONRECORD_8K {
struct GBEREGIONRECORD_4K main;
struct GBEREGIONRECORD_4K backup;
/*
* Backup region:
* This is actually "main" on X200, since the real main has a bad checksum
* and other errors. You should do what you need on this one (if modifying
* lenovobios's gbe region) and then copy to main
*/
};
/*
* ---------------------------------------------------------------------
* Function declarations (keep gcc/make happy. check them in gbe.c)
* ---------------------------------------------------------------------
*/
unsigned short gbeGetRegionWordFrom8kBuffer(int index, char* regionData);
unsigned short gbeGetChecksumFrom8kBuffer(char* regionData, unsigned short desiredValue, int byteOffset);
unsigned short gbeGetChecksumFrom4kStruct(struct GBEREGIONRECORD_4K gbeStruct4k, unsigned short desiredValue);
struct GBEREGIONRECORD_8K deblobbedGbeStructFromFactory(struct GBEREGIONRECORD_8K factoryGbeStruct8k);
void printGbeChecksumDataFromStruct4k(struct GBEREGIONRECORD_4K gbeStruct4k, char* romName, char* regionName);
void printGbeChecksumDataFromStruct8k(struct GBEREGIONRECORD_8K gbeStruct8k, char* romName);
#endif
|
