blob: c6e6747a401d9a06f16f91acc5eba53c8a595539 (
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
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
|
/*
* linux/include/linux/edd.h
* Copyright (C) 2002, 2003, 2004 Dell Inc.
* by Matt Domsch <Matt_Domsch@dell.com>
*
* structures and definitions for the int 13h, ax={41,48}h
* BIOS Enhanced Disk Drive Services
* This is based on the T13 group document D1572 Revision 0 (August 14 2002)
* available at http://www.t13.org/docs2002/d1572r0.pdf. It is
* very similar to D1484 Revision 3 http://www.t13.org/docs2002/d1484r3.pdf
*
* In a nutshell, arch/{i386,x86_64}/boot/setup.S populates a scratch
* table in the boot_params that contains a list of BIOS-enumerated
* boot devices.
* In arch/{i386,x86_64}/kernel/setup.c, this information is
* transferred into the edd structure, and in drivers/firmware/edd.c, that
* information is used to identify BIOS boot disk. The code in setup.S
* is very sensitive to the size of these structures.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License v2.0 as published by
* the Free Software Foundation
*
* 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.
*
*/
#ifndef _LINUX_EDD_H
#define _LINUX_EDD_H
#define EDDNR 0x1e9 /* addr of number of edd_info structs at EDDBUF
in boot_params - treat this as 1 byte */
#define EDDBUF 0x600 /* addr of edd_info structs in boot_params */
#define EDDMAXNR 6 /* number of edd_info structs starting at EDDBUF */
#define EDDEXTSIZE 8 /* change these if you muck with the structures */
#define EDDPARMSIZE 74
#define CHECKEXTENSIONSPRESENT 0x41
#define GETDEVICEPARAMETERS 0x48
#define LEGACYGETDEVICEPARAMETERS 0x08
#define EDDMAGIC1 0x55AA
#define EDDMAGIC2 0xAA55
#define READ_SECTORS 0x02 /* int13 AH=0x02 is READ_SECTORS command */
#define EDD_MBR_SIG_OFFSET 0x1B8 /* offset of signature in the MBR */
#define EDD_MBR_SIG_BUF 0x290 /* addr in boot params */
#define EDD_MBR_SIG_MAX 16 /* max number of signatures to store */
#define EDD_MBR_SIG_NR_BUF 0x1ea /* addr of number of MBR signtaures at EDD_MBR_SIG_BUF
in boot_params - treat this as 1 byte */
#define EDD_CL_EQUALS 0x3d646465 /* "edd=" */
#define EDD_CL_OFF 0x666f /* "of" for off */
#define EDD_CL_SKIP 0x6b73 /* "sk" for skipmbr */
#ifndef __ASSEMBLY__
#define EDD_EXT_FIXED_DISK_ACCESS (1 << 0)
#define EDD_EXT_DEVICE_LOCKING_AND_EJECTING (1 << 1)
#define EDD_EXT_ENHANCED_DISK_DRIVE_SUPPORT (1 << 2)
#define EDD_EXT_64BIT_EXTENSIONS (1 << 3)
#define EDD_INFO_DMA_BOUNDARY_ERROR_TRANSPARENT (1 << 0)
#define EDD_INFO_GEOMETRY_VALID (1 << 1)
#define EDD_INFO_REMOVABLE (1 << 2)
#define EDD_INFO_WRITE_VERIFY (1 << 3)
#define EDD_INFO_MEDIA_CHANGE_NOTIFICATION (1 << 4)
#define EDD_INFO_LOCKABLE (1 << 5)
#define EDD_INFO_NO_MEDIA_PRESENT (1 << 6)
#define EDD_INFO_USE_INT13_FN50 (1 << 7)
struct edd_device_params {
u16 length;
u16 info_flags;
u32 num_default_cylinders;
u32 num_default_heads;
u32 sectors_per_track;
u64 number_of_sectors;
u16 bytes_per_sector;
u32 dpte_ptr; /* 0xFFFFFFFF for our purposes */
u16 key; /* = 0xBEDD */
u8 device_path_info_length; /* = 44 */
u8 reserved2;
u16 reserved3;
u8 host_bus_type[4];
u8 interface_type[8];
union {
struct {
u16 base_address;
u16 reserved1;
u32 reserved2;
} __attribute__ ((packed)) isa;
struct {
u8 bus;
u8 slot;
u8 function;
u8 channel;
u32 reserved;
} __attribute__ ((packed)) pci;
/* pcix is same as pci */
struct {
u64 reserved;
} __attribute__ ((packed)) ibnd;
struct {
u64 reserved;
} __attribute__ ((packed)) xprs;
struct {
u64 reserved;
} __attribute__ ((packed)) htpt;
struct {
u64 reserved;
} __attribute__ ((packed)) unknown;
} interface_path;
union {
struct {
u8 device;
u8 reserved1;
u16 reserved2;
u32 reserved3;
u64 reserved4;
} __attribute__ ((packed)) ata;
struct {
u8 device;
u8 lun;
u8 reserved1;
u8 reserved2;
u32 reserved3;
u64 reserved4;
} __attribute__ ((packed)) atapi;
struct {
u16 id;
u64 lun;
u16 reserved1;
u32 reserved2;
} __attribute__ ((packed)) scsi;
struct {
u64 serial_number;
u64 reserved;
} __attribute__ ((packed)) usb;
struct {
u64 eui;
u64 reserved;
} __attribute__ ((packed)) i1394;
struct {
u64 wwid;
u64 lun;
} __attribute__ ((packed)) fibre;
struct {
u64 identity_tag;
u64 reserved;
} __attribute__ ((packed)) i2o;
struct {
u32 array_number;
u32 reserved1;
u64 reserved2;
} __attribute__ ((packed)) raid;
struct {
u8 device;
u8 reserved1;
u16 reserved2;
u32 reserved3;
u64 reserved4;
} __attribute__ ((packed)) sata;
struct {
u64 reserved1;
u64 reserved2;
} __attribute__ ((packed)) unknown;
} device_path;
u8 reserved4;
u8 checksum;
} __attribute__ ((packed));
struct edd_info {
u8 device;
u8 version;
u16 interface_support;
u16 legacy_max_cylinder;
u8 legacy_max_head;
u8 legacy_sectors_per_track;
struct edd_device_params params;
} __attribute__ ((packed));
struct edd {
unsigned int mbr_signature[EDD_MBR_SIG_MAX];
struct edd_info edd_info[EDDMAXNR];
unsigned char mbr_signature_nr;
unsigned char edd_info_nr;
};
extern struct edd edd;
#endif /*!__ASSEMBLY__ */
#endif /* _LINUX_EDD_H */
|
