linux/include/uapi/linux/edd.h at master · fabgithub/linux · GitHub

Repository navigation

History

191 lines (179 loc) · 5.43 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

* linux/include/linux/edd.h

* by Matt Domsch <Matt_Domsch@dell.com>

* structures and definitions for the int 13h, ax={41,48}h

* BIOS Enhanced Disk Drive Services

* This is based on the T13 group document D1572 Revision 0 (August 14 2002)

* available at http://www.t13.org/docs2002/d1572r0.pdf. It is

* very similar to D1484 Revision 3 http://www.t13.org/docs2002/d1484r3.pdf

* In a nutshell, arch/{i386,x86_64}/boot/setup.S populates a scratch

* table in the boot_params that contains a list of BIOS-enumerated

* boot devices.

* In arch/{i386,x86_64}/kernel/setup.c, this information is

* transferred into the edd structure, and in drivers/firmware/edd.c, that

* information is used to identify BIOS boot disk. The code in setup.S

* is very sensitive to the size of these structures.

* This program is free software; you can redistribute it and/or modify

* it under the terms of the GNU General Public License v2.0 as published by

* the Free Software Foundation

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

#ifndef _UAPI_LINUX_EDD_H

#define _UAPI_LINUX_EDD_H

#include <linux/types.h>

#define EDDNR 0x1e9 /* addr of number of edd_info structs at EDDBUF

in boot_params - treat this as 1 byte */

#define EDDBUF 0xd00 /* addr of edd_info structs in boot_params */

#define EDDMAXNR 6 /* number of edd_info structs starting at EDDBUF */

#define EDDEXTSIZE 8 /* change these if you muck with the structures */

#define EDDPARMSIZE 74

#define CHECKEXTENSIONSPRESENT 0x41

#define GETDEVICEPARAMETERS 0x48

#define LEGACYGETDEVICEPARAMETERS 0x08

#define EDDMAGIC1 0x55AA

#define EDDMAGIC2 0xAA55

#define READ_SECTORS 0x02 /* int13 AH=0x02 is READ_SECTORS command */

#define EDD_MBR_SIG_OFFSET 0x1B8 /* offset of signature in the MBR */

#define EDD_MBR_SIG_BUF 0x290 /* addr in boot params */

#define EDD_MBR_SIG_MAX 16 /* max number of signatures to store */

#define EDD_MBR_SIG_NR_BUF 0x1ea /* addr of number of MBR signtaures at EDD_MBR_SIG_BUF

in boot_params - treat this as 1 byte */

#ifndef __ASSEMBLY__

#define EDD_EXT_FIXED_DISK_ACCESS (1 << 0)

#define EDD_EXT_DEVICE_LOCKING_AND_EJECTING (1 << 1)

#define EDD_EXT_ENHANCED_DISK_DRIVE_SUPPORT (1 << 2)

#define EDD_EXT_64BIT_EXTENSIONS (1 << 3)

#define EDD_INFO_DMA_BOUNDARY_ERROR_TRANSPARENT (1 << 0)

#define EDD_INFO_GEOMETRY_VALID (1 << 1)

#define EDD_INFO_REMOVABLE (1 << 2)

#define EDD_INFO_WRITE_VERIFY (1 << 3)

#define EDD_INFO_MEDIA_CHANGE_NOTIFICATION (1 << 4)

#define EDD_INFO_LOCKABLE (1 << 5)

#define EDD_INFO_NO_MEDIA_PRESENT (1 << 6)

#define EDD_INFO_USE_INT13_FN50 (1 << 7)

struct edd_device_params {

__u16 length;

__u16 info_flags;

__u32 num_default_cylinders;

__u32 num_default_heads;

__u32 sectors_per_track;

__u64 number_of_sectors;

__u16 bytes_per_sector;

__u32 dpte_ptr; /* 0xFFFFFFFF for our purposes */

__u16 key; /* = 0xBEDD */

__u8 device_path_info_length; /* = 44 */

__u8 reserved2;

__u16 reserved3;

__u8 host_bus_type[4];

__u8 interface_type[8];

union {

struct {

__u16 base_address;

__u16 reserved1;

__u32 reserved2;

} __attribute__ ((packed)) isa;

struct {

__u8 bus;

__u8 slot;

__u8 function;

__u8 channel;

__u32 reserved;

} __attribute__ ((packed)) pci;

/* pcix is same as pci */

struct {

__u64 reserved;

} __attribute__ ((packed)) ibnd;

struct {

__u64 reserved;

} __attribute__ ((packed)) xprs;

struct {

__u64 reserved;

} __attribute__ ((packed)) htpt;

struct {

__u64 reserved;

} __attribute__ ((packed)) unknown;

} interface_path;

union {

struct {

__u8 device;

__u8 reserved1;

__u16 reserved2;

__u32 reserved3;

__u64 reserved4;

} __attribute__ ((packed)) ata;

struct {

__u8 device;

__u8 lun;

__u8 reserved1;

__u8 reserved2;

__u32 reserved3;

__u64 reserved4;

} __attribute__ ((packed)) atapi;

struct {

__u16 id;

__u64 lun;

__u16 reserved1;

__u32 reserved2;

} __attribute__ ((packed)) scsi;

struct {

__u64 serial_number;

__u64 reserved;

} __attribute__ ((packed)) usb;

struct {

__u64 eui;

__u64 reserved;

} __attribute__ ((packed)) i1394;

struct {

__u64 wwid;

__u64 lun;

} __attribute__ ((packed)) fibre;

struct {

__u64 identity_tag;

__u64 reserved;

} __attribute__ ((packed)) i2o;

struct {

__u32 array_number;

__u32 reserved1;

__u64 reserved2;

} __attribute__ ((packed)) raid;

struct {

__u8 device;

__u8 reserved1;

__u16 reserved2;

__u32 reserved3;

__u64 reserved4;

} __attribute__ ((packed)) sata;

struct {

__u64 reserved1;

__u64 reserved2;

} __attribute__ ((packed)) unknown;

} device_path;

__u8 reserved4;

__u8 checksum;

} __attribute__ ((packed));

struct edd_info {

__u8 device;

__u8 version;

__u16 interface_support;

__u16 legacy_max_cylinder;

__u8 legacy_max_head;

__u8 legacy_sectors_per_track;

struct edd_device_params params;

} __attribute__ ((packed));

struct edd {

unsigned int mbr_signature[EDD_MBR_SIG_MAX];

struct edd_info edd_info[EDDMAXNR];

unsigned char mbr_signature_nr;

unsigned char edd_info_nr;

};

#endif /*!__ASSEMBLY__ */

#endif /* _UAPI_LINUX_EDD_H */

linux/include/uapi/linux/edd.h at master · fabgithub/linux · GitHub

Repository navigation

Expand file tree

Breadcrumbs

edd.h

Latest commit

History

Breadcrumbs

edd.h

File metadata and controls