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TOMOYO Linux Cross Reference
Linux/include/uapi/linux/edd.h

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  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 _UAPI_LINUX_EDD_H
 31 #define _UAPI_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 
 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 #endif                          /*!__ASSEMBLY__ */
190 
191 #endif /* _UAPI_LINUX_EDD_H */
192 

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