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gerrit-public.fairphone.software / kernel / msm-4.9 / 3bacbcd8830f89fc527f5c7dc13f24d0ce692980 / . / include / linux / edd.h
blob: 7b647822d6dc67f6d95e003455076e80c98a156c [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1/*
2 * linux/include/linux/edd.h
3 * Copyright (C) 2002, 2003, 2004 Dell Inc.
4 * by Matt Domsch <Matt_Domsch@dell.com>
5 *
6 * structures and definitions for the int 13h, ax={41,48}h
7 * BIOS Enhanced Disk Drive Services
8 * This is based on the T13 group document D1572 Revision 0 (August 14 2002)
9 * available at http://www.t13.org/docs2002/d1572r0.pdf. It is
10 * very similar to D1484 Revision 3 http://www.t13.org/docs2002/d1484r3.pdf
11 *
12 * In a nutshell, arch/{i386,x86_64}/boot/setup.S populates a scratch
13 * table in the boot_params that contains a list of BIOS-enumerated
14 * boot devices.
15 * In arch/{i386,x86_64}/kernel/setup.c, this information is
16 * transferred into the edd structure, and in drivers/firmware/edd.c, that
17 * information is used to identify BIOS boot disk. The code in setup.S
18 * is very sensitive to the size of these structures.
19 *
20 * This program is free software; you can redistribute it and/or modify
21 * it under the terms of the GNU General Public License v2.0 as published by
22 * the Free Software Foundation
23 *
24 * This program is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27 * GNU General Public License for more details.
28 *
29 */
30#ifndef _LINUX_EDD_H
31#define _LINUX_EDD_H
32
33#define EDDNR 0x1e9 /* addr of number of edd_info structs at EDDBUF
34 in boot_params - treat this as 1 byte */
Venkatesh Pallipadif9ba7052005-05-01 08:58:51 -0700[diff] [blame]35#define EDDBUF 0xd00 /* addr of edd_info structs in boot_params */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]36#define EDDMAXNR 6 /* number of edd_info structs starting at EDDBUF */
37#define EDDEXTSIZE 8 /* change these if you muck with the structures */
38#define EDDPARMSIZE 74
39#define CHECKEXTENSIONSPRESENT 0x41
40#define GETDEVICEPARAMETERS 0x48
41#define LEGACYGETDEVICEPARAMETERS 0x08
42#define EDDMAGIC1 0x55AA
43#define EDDMAGIC2 0xAA55
44
45
46#define READ_SECTORS 0x02 /* int13 AH=0x02 is READ_SECTORS command */
47#define EDD_MBR_SIG_OFFSET 0x1B8 /* offset of signature in the MBR */
48#define EDD_MBR_SIG_BUF 0x290 /* addr in boot params */
49#define EDD_MBR_SIG_MAX 16 /* max number of signatures to store */
50#define EDD_MBR_SIG_NR_BUF 0x1ea /* addr of number of MBR signtaures at EDD_MBR_SIG_BUF
51 in boot_params - treat this as 1 byte */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]52
53#ifndef __ASSEMBLY__
54
55#define EDD_EXT_FIXED_DISK_ACCESS (1 << 0)
56#define EDD_EXT_DEVICE_LOCKING_AND_EJECTING (1 << 1)
57#define EDD_EXT_ENHANCED_DISK_DRIVE_SUPPORT (1 << 2)
58#define EDD_EXT_64BIT_EXTENSIONS (1 << 3)
59
60#define EDD_INFO_DMA_BOUNDARY_ERROR_TRANSPARENT (1 << 0)
61#define EDD_INFO_GEOMETRY_VALID (1 << 1)
62#define EDD_INFO_REMOVABLE (1 << 2)
63#define EDD_INFO_WRITE_VERIFY (1 << 3)
64#define EDD_INFO_MEDIA_CHANGE_NOTIFICATION (1 << 4)
65#define EDD_INFO_LOCKABLE (1 << 5)
66#define EDD_INFO_NO_MEDIA_PRESENT (1 << 6)
67#define EDD_INFO_USE_INT13_FN50 (1 << 7)
68
69struct edd_device_params {
70 u16 length;
71 u16 info_flags;
72 u32 num_default_cylinders;
73 u32 num_default_heads;
74 u32 sectors_per_track;
75 u64 number_of_sectors;
76 u16 bytes_per_sector;
77 u32 dpte_ptr; /* 0xFFFFFFFF for our purposes */
78 u16 key; /* = 0xBEDD */
79 u8 device_path_info_length; /* = 44 */
80 u8 reserved2;
81 u16 reserved3;
82 u8 host_bus_type[4];
83 u8 interface_type[8];
84 union {
85 struct {
86 u16 base_address;
87 u16 reserved1;
88 u32 reserved2;
89 } __attribute__ ((packed)) isa;
90 struct {
91 u8 bus;
92 u8 slot;
93 u8 function;
94 u8 channel;
95 u32 reserved;
96 } __attribute__ ((packed)) pci;
97 /* pcix is same as pci */
98 struct {
99 u64 reserved;
100 } __attribute__ ((packed)) ibnd;
101 struct {
102 u64 reserved;
103 } __attribute__ ((packed)) xprs;
104 struct {
105 u64 reserved;
106 } __attribute__ ((packed)) htpt;
107 struct {
108 u64 reserved;
109 } __attribute__ ((packed)) unknown;
110 } interface_path;
111 union {
112 struct {
113 u8 device;
114 u8 reserved1;
115 u16 reserved2;
116 u32 reserved3;
117 u64 reserved4;
118 } __attribute__ ((packed)) ata;
119 struct {
120 u8 device;
121 u8 lun;
122 u8 reserved1;
123 u8 reserved2;
124 u32 reserved3;
125 u64 reserved4;
126 } __attribute__ ((packed)) atapi;
127 struct {
128 u16 id;
129 u64 lun;
130 u16 reserved1;
131 u32 reserved2;
132 } __attribute__ ((packed)) scsi;
133 struct {
134 u64 serial_number;
135 u64 reserved;
136 } __attribute__ ((packed)) usb;
137 struct {
138 u64 eui;
139 u64 reserved;
140 } __attribute__ ((packed)) i1394;
141 struct {
142 u64 wwid;
143 u64 lun;
144 } __attribute__ ((packed)) fibre;
145 struct {
146 u64 identity_tag;
147 u64 reserved;
148 } __attribute__ ((packed)) i2o;
149 struct {
150 u32 array_number;
151 u32 reserved1;
152 u64 reserved2;
153 } __attribute__ ((packed)) raid;
154 struct {
155 u8 device;
156 u8 reserved1;
157 u16 reserved2;
158 u32 reserved3;
159 u64 reserved4;
160 } __attribute__ ((packed)) sata;
161 struct {
162 u64 reserved1;
163 u64 reserved2;
164 } __attribute__ ((packed)) unknown;
165 } device_path;
166 u8 reserved4;
167 u8 checksum;
168} __attribute__ ((packed));
169
170struct edd_info {
171 u8 device;
172 u8 version;
173 u16 interface_support;
174 u16 legacy_max_cylinder;
175 u8 legacy_max_head;
176 u8 legacy_sectors_per_track;
177 struct edd_device_params params;
178} __attribute__ ((packed));
179
180struct edd {
181 unsigned int mbr_signature[EDD_MBR_SIG_MAX];
182 struct edd_info edd_info[EDDMAXNR];
183 unsigned char mbr_signature_nr;
184 unsigned char edd_info_nr;
185};
186
187extern struct edd edd;
188
189#endif /*!__ASSEMBLY__ */
190
191#endif /* _LINUX_EDD_H */