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git01.mediatek.com / filogic / uboot / d1066bab1f6081648789ab8ebb17ab0ee9f90567 / . / include / linux / edd.h
blob: 4cbd0fe9df0898f09a4641270ebd89d0f7def56a [file] [log] [blame]
Graeme Russ1bab1042010-04-24 00:05:49 +1000[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#include <linux/types.h>
34
35#define EDDNR 0x1e9 /* addr of number of edd_info structs at EDDBUF
36 in boot_params - treat this as 1 byte */
37#define EDDBUF 0xd00 /* addr of edd_info structs in boot_params */
38#define EDDMAXNR 6 /* number of edd_info structs starting at EDDBUF */
39#define EDDEXTSIZE 8 /* change these if you muck with the structures */
40#define EDDPARMSIZE 74
41#define CHECKEXTENSIONSPRESENT 0x41
42#define GETDEVICEPARAMETERS 0x48
43#define LEGACYGETDEVICEPARAMETERS 0x08
44#define EDDMAGIC1 0x55AA
45#define EDDMAGIC2 0xAA55
46
47
48#define READ_SECTORS 0x02 /* int13 AH=0x02 is READ_SECTORS command */
49#define EDD_MBR_SIG_OFFSET 0x1B8 /* offset of signature in the MBR */
50#define EDD_MBR_SIG_BUF 0x290 /* addr in boot params */
51#define EDD_MBR_SIG_MAX 16 /* max number of signatures to store */
52#define EDD_MBR_SIG_NR_BUF 0x1ea /* addr of number of MBR signtaures at EDD_MBR_SIG_BUF
53 in boot_params - treat this as 1 byte */
54
55#ifndef __ASSEMBLY__
56
57#define EDD_EXT_FIXED_DISK_ACCESS (1 << 0)
58#define EDD_EXT_DEVICE_LOCKING_AND_EJECTING (1 << 1)
59#define EDD_EXT_ENHANCED_DISK_DRIVE_SUPPORT (1 << 2)
60#define EDD_EXT_64BIT_EXTENSIONS (1 << 3)
61
62#define EDD_INFO_DMA_BOUNDARY_ERROR_TRANSPARENT (1 << 0)
63#define EDD_INFO_GEOMETRY_VALID (1 << 1)
64#define EDD_INFO_REMOVABLE (1 << 2)
65#define EDD_INFO_WRITE_VERIFY (1 << 3)
66#define EDD_INFO_MEDIA_CHANGE_NOTIFICATION (1 << 4)
67#define EDD_INFO_LOCKABLE (1 << 5)
68#define EDD_INFO_NO_MEDIA_PRESENT (1 << 6)
69#define EDD_INFO_USE_INT13_FN50 (1 << 7)
70
71struct edd_device_params {
72 __u16 length;
73 __u16 info_flags;
74 __u32 num_default_cylinders;
75 __u32 num_default_heads;
76 __u32 sectors_per_track;
77 __u64 number_of_sectors;
78 __u16 bytes_per_sector;
79 __u32 dpte_ptr; /* 0xFFFFFFFF for our purposes */
80 __u16 key; /* = 0xBEDD */
81 __u8 device_path_info_length; /* = 44 */
82 __u8 reserved2;
83 __u16 reserved3;
84 __u8 host_bus_type[4];
85 __u8 interface_type[8];
86 union {
87 struct {
88 __u16 base_address;
89 __u16 reserved1;
90 __u32 reserved2;
91 } __attribute__ ((packed)) isa;
92 struct {
93 __u8 bus;
94 __u8 slot;
95 __u8 function;
96 __u8 channel;
97 __u32 reserved;
98 } __attribute__ ((packed)) pci;
99 /* pcix is same as pci */
100 struct {
101 __u64 reserved;
102 } __attribute__ ((packed)) ibnd;
103 struct {
104 __u64 reserved;
105 } __attribute__ ((packed)) xprs;
106 struct {
107 __u64 reserved;
108 } __attribute__ ((packed)) htpt;
109 struct {
110 __u64 reserved;
111 } __attribute__ ((packed)) unknown;
112 } interface_path;
113 union {
114 struct {
115 __u8 device;
116 __u8 reserved1;
117 __u16 reserved2;
118 __u32 reserved3;
119 __u64 reserved4;
120 } __attribute__ ((packed)) ata;
121 struct {
122 __u8 device;
123 __u8 lun;
124 __u8 reserved1;
125 __u8 reserved2;
126 __u32 reserved3;
127 __u64 reserved4;
128 } __attribute__ ((packed)) atapi;
129 struct {
130 __u16 id;
131 __u64 lun;
132 __u16 reserved1;
133 __u32 reserved2;
134 } __attribute__ ((packed)) scsi;
135 struct {
136 __u64 serial_number;
137 __u64 reserved;
138 } __attribute__ ((packed)) usb;
139 struct {
140 __u64 eui;
141 __u64 reserved;
142 } __attribute__ ((packed)) i1394;
143 struct {
144 __u64 wwid;
145 __u64 lun;
146 } __attribute__ ((packed)) fibre;
147 struct {
148 __u64 identity_tag;
149 __u64 reserved;
150 } __attribute__ ((packed)) i2o;
151 struct {
152 __u32 array_number;
153 __u32 reserved1;
154 __u64 reserved2;
155 } __attribute__ ((packed)) raid;
156 struct {
157 __u8 device;
158 __u8 reserved1;
159 __u16 reserved2;
160 __u32 reserved3;
161 __u64 reserved4;
162 } __attribute__ ((packed)) sata;
163 struct {
164 __u64 reserved1;
165 __u64 reserved2;
166 } __attribute__ ((packed)) unknown;
167 } device_path;
168 __u8 reserved4;
169 __u8 checksum;
170} __attribute__ ((packed));
171
172struct edd_info {
173 __u8 device;
174 __u8 version;
175 __u16 interface_support;
176 __u16 legacy_max_cylinder;
177 __u8 legacy_max_head;
178 __u8 legacy_sectors_per_track;
179 struct edd_device_params params;
180} __attribute__ ((packed));
181
182struct edd {
183 unsigned int mbr_signature[EDD_MBR_SIG_MAX];
184 struct edd_info edd_info[EDDMAXNR];
185 unsigned char mbr_signature_nr;
186 unsigned char edd_info_nr;
187};
188
189#ifdef __KERNEL__
190extern struct edd edd;
191#endif /* __KERNEL__ */
192#endif /*!__ASSEMBLY__ */
193
194#endif /* _LINUX_EDD_H */