1 /* SPDX-License-Identifier: GPL-2.0-only */ <<
2 /* 1 /*
3 * linux/include/linux/edd.h 2 * linux/include/linux/edd.h
4 * Copyright (C) 2002, 2003, 2004 Dell Inc. 3 * Copyright (C) 2002, 2003, 2004 Dell Inc.
5 * by Matt Domsch <Matt_Domsch@dell.com> 4 * by Matt Domsch <Matt_Domsch@dell.com>
6 * 5 *
7 * structures and definitions for the int 13h, 6 * structures and definitions for the int 13h, ax={41,48}h
8 * BIOS Enhanced Disk Drive Services 7 * BIOS Enhanced Disk Drive Services
9 * This is based on the T13 group document D15 8 * This is based on the T13 group document D1572 Revision 0 (August 14 2002)
10 * available at http://www.t13.org/docs2002/d1 9 * available at http://www.t13.org/docs2002/d1572r0.pdf. It is
11 * very similar to D1484 Revision 3 http://www 10 * very similar to D1484 Revision 3 http://www.t13.org/docs2002/d1484r3.pdf
12 * 11 *
13 * In a nutshell, arch/{i386,x86_64}/boot/setu 12 * In a nutshell, arch/{i386,x86_64}/boot/setup.S populates a scratch
14 * table in the boot_params that contains a li 13 * table in the boot_params that contains a list of BIOS-enumerated
15 * boot devices. 14 * boot devices.
16 * In arch/{i386,x86_64}/kernel/setup.c, this 15 * In arch/{i386,x86_64}/kernel/setup.c, this information is
17 * transferred into the edd structure, and in 16 * transferred into the edd structure, and in drivers/firmware/edd.c, that
18 * information is used to identify BIOS boot d 17 * information is used to identify BIOS boot disk. The code in setup.S
19 * is very sensitive to the size of these stru 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 *
20 */ 29 */
21 #ifndef _LINUX_EDD_H 30 #ifndef _LINUX_EDD_H
22 #define _LINUX_EDD_H 31 #define _LINUX_EDD_H
23 32
24 #include <uapi/linux/edd.h> !! 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 */
25 54
26 #ifndef __ASSEMBLY__ 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
>> 71 struct 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
>> 172 struct 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
>> 182 struct 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__
27 extern struct edd edd; 190 extern struct edd edd;
>> 191 #endif /* __KERNEL__ */
28 #endif /*!__ASSEMBLY_ 192 #endif /*!__ASSEMBLY__ */
>> 193
29 #endif /* _LINUX_EDD_ 194 #endif /* _LINUX_EDD_H */
30 195
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.