1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
2 | /* |
3 | * linux/include/linux/edd.h |
4 | * Copyright (C) 2002, 2003, 2004 Dell Inc. |
5 | * by Matt Domsch <Matt_Domsch@dell.com> |
6 | * |
7 | * structures and definitions for the int 13h, ax={41,48}h |
8 | * BIOS Enhanced Disk Drive Services |
9 | * This is based on the T13 group document D1572 Revision 0 (August 14 2002) |
10 | * available at http://www.t13.org/docs2002/d1572r0.pdf. It is |
11 | * very similar to D1484 Revision 3 http://www.t13.org/docs2002/d1484r3.pdf |
12 | * |
13 | * In a nutshell, arch/{i386,x86_64}/boot/setup.S populates a scratch |
14 | * table in the boot_params that contains a list of BIOS-enumerated |
15 | * boot devices. |
16 | * In arch/{i386,x86_64}/kernel/setup.c, this information is |
17 | * transferred into the edd structure, and in drivers/firmware/edd.c, that |
18 | * information is used to identify BIOS boot disk. The code in setup.S |
19 | * is very sensitive to the size of these structures. |
20 | * |
21 | * This program is free software; you can redistribute it and/or modify |
22 | * it under the terms of the GNU General Public License v2.0 as published by |
23 | * the Free Software Foundation |
24 | * |
25 | * This program is distributed in the hope that it will be useful, |
26 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
28 | * GNU General Public License for more details. |
29 | * |
30 | */ |
31 | #ifndef _UAPI_LINUX_EDD_H |
32 | #define _UAPI_LINUX_EDD_H |
33 | |
34 | #include <linux/types.h> |
35 | |
36 | #define EDDNR 0x1e9 /* addr of number of edd_info structs at EDDBUF |
37 | in boot_params - treat this as 1 byte */ |
38 | #define EDDBUF 0xd00 /* addr of edd_info structs in boot_params */ |
39 | #define EDDMAXNR 6 /* number of edd_info structs starting at EDDBUF */ |
40 | #define EDDEXTSIZE 8 /* change these if you muck with the structures */ |
41 | #define EDDPARMSIZE 74 |
42 | #define CHECKEXTENSIONSPRESENT 0x41 |
43 | #define GETDEVICEPARAMETERS 0x48 |
44 | #define LEGACYGETDEVICEPARAMETERS 0x08 |
45 | #define EDDMAGIC1 0x55AA |
46 | #define EDDMAGIC2 0xAA55 |
47 | |
48 | |
49 | #define READ_SECTORS 0x02 /* int13 AH=0x02 is READ_SECTORS command */ |
50 | #define EDD_MBR_SIG_OFFSET 0x1B8 /* offset of signature in the MBR */ |
51 | #define EDD_MBR_SIG_BUF 0x290 /* addr in boot params */ |
52 | #define EDD_MBR_SIG_MAX 16 /* max number of signatures to store */ |
53 | #define EDD_MBR_SIG_NR_BUF 0x1ea /* addr of number of MBR signtaures at EDD_MBR_SIG_BUF |
54 | in boot_params - treat this as 1 byte */ |
55 | |
56 | #ifndef __ASSEMBLY__ |
57 | |
58 | #define EDD_EXT_FIXED_DISK_ACCESS (1 << 0) |
59 | #define EDD_EXT_DEVICE_LOCKING_AND_EJECTING (1 << 1) |
60 | #define EDD_EXT_ENHANCED_DISK_DRIVE_SUPPORT (1 << 2) |
61 | #define EDD_EXT_64BIT_EXTENSIONS (1 << 3) |
62 | |
63 | #define EDD_INFO_DMA_BOUNDARY_ERROR_TRANSPARENT (1 << 0) |
64 | #define EDD_INFO_GEOMETRY_VALID (1 << 1) |
65 | #define EDD_INFO_REMOVABLE (1 << 2) |
66 | #define EDD_INFO_WRITE_VERIFY (1 << 3) |
67 | #define EDD_INFO_MEDIA_CHANGE_NOTIFICATION (1 << 4) |
68 | #define EDD_INFO_LOCKABLE (1 << 5) |
69 | #define EDD_INFO_NO_MEDIA_PRESENT (1 << 6) |
70 | #define EDD_INFO_USE_INT13_FN50 (1 << 7) |
71 | |
72 | struct edd_device_params { |
73 | __u16 length; |
74 | __u16 info_flags; |
75 | __u32 num_default_cylinders; |
76 | __u32 num_default_heads; |
77 | __u32 sectors_per_track; |
78 | __u64 number_of_sectors; |
79 | __u16 bytes_per_sector; |
80 | __u32 dpte_ptr; /* 0xFFFFFFFF for our purposes */ |
81 | __u16 key; /* = 0xBEDD */ |
82 | __u8 device_path_info_length; /* = 44 */ |
83 | __u8 reserved2; |
84 | __u16 reserved3; |
85 | __u8 host_bus_type[4]; |
86 | __u8 interface_type[8]; |
87 | union { |
88 | struct { |
89 | __u16 base_address; |
90 | __u16 reserved1; |
91 | __u32 reserved2; |
92 | } __attribute__ ((packed)) isa; |
93 | struct { |
94 | __u8 bus; |
95 | __u8 slot; |
96 | __u8 function; |
97 | __u8 channel; |
98 | __u32 reserved; |
99 | } __attribute__ ((packed)) pci; |
100 | /* pcix is same as pci */ |
101 | struct { |
102 | __u64 reserved; |
103 | } __attribute__ ((packed)) ibnd; |
104 | struct { |
105 | __u64 reserved; |
106 | } __attribute__ ((packed)) xprs; |
107 | struct { |
108 | __u64 reserved; |
109 | } __attribute__ ((packed)) htpt; |
110 | struct { |
111 | __u64 reserved; |
112 | } __attribute__ ((packed)) unknown; |
113 | } interface_path; |
114 | union { |
115 | struct { |
116 | __u8 device; |
117 | __u8 reserved1; |
118 | __u16 reserved2; |
119 | __u32 reserved3; |
120 | __u64 reserved4; |
121 | } __attribute__ ((packed)) ata; |
122 | struct { |
123 | __u8 device; |
124 | __u8 lun; |
125 | __u8 reserved1; |
126 | __u8 reserved2; |
127 | __u32 reserved3; |
128 | __u64 reserved4; |
129 | } __attribute__ ((packed)) atapi; |
130 | struct { |
131 | __u16 id; |
132 | __u64 lun; |
133 | __u16 reserved1; |
134 | __u32 reserved2; |
135 | } __attribute__ ((packed)) scsi; |
136 | struct { |
137 | __u64 serial_number; |
138 | __u64 reserved; |
139 | } __attribute__ ((packed)) usb; |
140 | struct { |
141 | __u64 eui; |
142 | __u64 reserved; |
143 | } __attribute__ ((packed)) i1394; |
144 | struct { |
145 | __u64 wwid; |
146 | __u64 lun; |
147 | } __attribute__ ((packed)) fibre; |
148 | struct { |
149 | __u64 identity_tag; |
150 | __u64 reserved; |
151 | } __attribute__ ((packed)) i2o; |
152 | struct { |
153 | __u32 array_number; |
154 | __u32 reserved1; |
155 | __u64 reserved2; |
156 | } __attribute__ ((packed)) raid; |
157 | struct { |
158 | __u8 device; |
159 | __u8 reserved1; |
160 | __u16 reserved2; |
161 | __u32 reserved3; |
162 | __u64 reserved4; |
163 | } __attribute__ ((packed)) sata; |
164 | struct { |
165 | __u64 reserved1; |
166 | __u64 reserved2; |
167 | } __attribute__ ((packed)) unknown; |
168 | } device_path; |
169 | __u8 reserved4; |
170 | __u8 checksum; |
171 | } __attribute__ ((packed)); |
172 | |
173 | struct edd_info { |
174 | __u8 device; |
175 | __u8 version; |
176 | __u16 interface_support; |
177 | __u16 legacy_max_cylinder; |
178 | __u8 legacy_max_head; |
179 | __u8 legacy_sectors_per_track; |
180 | struct edd_device_params params; |
181 | } __attribute__ ((packed)); |
182 | |
183 | struct edd { |
184 | unsigned int mbr_signature[EDD_MBR_SIG_MAX]; |
185 | struct edd_info edd_info[EDDMAXNR]; |
186 | unsigned char mbr_signature_nr; |
187 | unsigned char edd_info_nr; |
188 | }; |
189 | |
190 | #endif /*!__ASSEMBLY__ */ |
191 | |
192 | #endif /* _UAPI_LINUX_EDD_H */ |
193 | |