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git01.mediatek.com / filogic / uboot / 1563250e7bc8a0dcf531a6bc750486542e2d1877 / . / include / linux / edd.h
blob: 904e3d218d2d3ec7d7862085b703775385e2320c [file] [log] [blame]
Tom Rini10e47792018-05-06 17:58:06 -0400[diff] [blame]1/* SPDX-License-Identifier: GPL-2.0 */
Graeme Russ1bab1042010-04-24 00:05:49 +1000[diff] [blame]2/*
3 * linux/include/linux/edd.h
4 * Copyright (C) 2002, 2003, 2004 Dell Inc.
5 * by Matt Domsch <Matt_Domsch@dell.com>
6 *
7 * structures and definitions for the int 13h, ax={41,48}h
8 * BIOS Enhanced Disk Drive Services
9 * This is based on the T13 group document D1572 Revision 0 (August 14 2002)
10 * available at http://www.t13.org/docs2002/d1572r0.pdf. It is
11 * very similar to D1484 Revision 3 http://www.t13.org/docs2002/d1484r3.pdf
12 *
13 * In a nutshell, arch/{i386,x86_64}/boot/setup.S populates a scratch
14 * table in the boot_params that contains a list of BIOS-enumerated
15 * boot devices.
16 * In arch/{i386,x86_64}/kernel/setup.c, this information is
17 * transferred into the edd structure, and in drivers/firmware/edd.c, that
18 * information is used to identify BIOS boot disk. The code in setup.S
19 * is very sensitive to the size of these structures.
Graeme Russ1bab1042010-04-24 00:05:49 +1000[diff] [blame]20 */
21#ifndef _LINUX_EDD_H
22#define _LINUX_EDD_H
23
24#include <linux/types.h>
25
26#define EDDNR 0x1e9 /* addr of number of edd_info structs at EDDBUF
27 in boot_params - treat this as 1 byte */
28#define EDDBUF 0xd00 /* addr of edd_info structs in boot_params */
29#define EDDMAXNR 6 /* number of edd_info structs starting at EDDBUF */
30#define EDDEXTSIZE 8 /* change these if you muck with the structures */
31#define EDDPARMSIZE 74
32#define CHECKEXTENSIONSPRESENT 0x41
33#define GETDEVICEPARAMETERS 0x48
34#define LEGACYGETDEVICEPARAMETERS 0x08
35#define EDDMAGIC1 0x55AA
36#define EDDMAGIC2 0xAA55
37
Graeme Russ1bab1042010-04-24 00:05:49 +1000[diff] [blame]38#define READ_SECTORS 0x02 /* int13 AH=0x02 is READ_SECTORS command */
39#define EDD_MBR_SIG_OFFSET 0x1B8 /* offset of signature in the MBR */
40#define EDD_MBR_SIG_BUF 0x290 /* addr in boot params */
41#define EDD_MBR_SIG_MAX 16 /* max number of signatures to store */
42#define EDD_MBR_SIG_NR_BUF 0x1ea /* addr of number of MBR signtaures at EDD_MBR_SIG_BUF
43 in boot_params - treat this as 1 byte */
44
45#ifndef __ASSEMBLY__
46
47#define EDD_EXT_FIXED_DISK_ACCESS (1 << 0)
48#define EDD_EXT_DEVICE_LOCKING_AND_EJECTING (1 << 1)
49#define EDD_EXT_ENHANCED_DISK_DRIVE_SUPPORT (1 << 2)
50#define EDD_EXT_64BIT_EXTENSIONS (1 << 3)
51
52#define EDD_INFO_DMA_BOUNDARY_ERROR_TRANSPARENT (1 << 0)
53#define EDD_INFO_GEOMETRY_VALID (1 << 1)
54#define EDD_INFO_REMOVABLE (1 << 2)
55#define EDD_INFO_WRITE_VERIFY (1 << 3)
56#define EDD_INFO_MEDIA_CHANGE_NOTIFICATION (1 << 4)
57#define EDD_INFO_LOCKABLE (1 << 5)
58#define EDD_INFO_NO_MEDIA_PRESENT (1 << 6)
59#define EDD_INFO_USE_INT13_FN50 (1 << 7)
60
61struct edd_device_params {
62 __u16 length;
63 __u16 info_flags;
64 __u32 num_default_cylinders;
65 __u32 num_default_heads;
66 __u32 sectors_per_track;
67 __u64 number_of_sectors;
68 __u16 bytes_per_sector;
69 __u32 dpte_ptr; /* 0xFFFFFFFF for our purposes */
70 __u16 key; /* = 0xBEDD */
71 __u8 device_path_info_length; /* = 44 */
72 __u8 reserved2;
73 __u16 reserved3;
74 __u8 host_bus_type[4];
75 __u8 interface_type[8];
76 union {
77 struct {
78 __u16 base_address;
79 __u16 reserved1;
80 __u32 reserved2;
81 } __attribute__ ((packed)) isa;
82 struct {
83 __u8 bus;
84 __u8 slot;
85 __u8 function;
86 __u8 channel;
87 __u32 reserved;
88 } __attribute__ ((packed)) pci;
89 /* pcix is same as pci */
90 struct {
91 __u64 reserved;
92 } __attribute__ ((packed)) ibnd;
93 struct {
94 __u64 reserved;
95 } __attribute__ ((packed)) xprs;
96 struct {
97 __u64 reserved;
98 } __attribute__ ((packed)) htpt;
99 struct {
100 __u64 reserved;
101 } __attribute__ ((packed)) unknown;
102 } interface_path;
103 union {
104 struct {
105 __u8 device;
106 __u8 reserved1;
107 __u16 reserved2;
108 __u32 reserved3;
109 __u64 reserved4;
110 } __attribute__ ((packed)) ata;
111 struct {
112 __u8 device;
113 __u8 lun;
114 __u8 reserved1;
115 __u8 reserved2;
116 __u32 reserved3;
117 __u64 reserved4;
118 } __attribute__ ((packed)) atapi;
119 struct {
120 __u16 id;
121 __u64 lun;
122 __u16 reserved1;
123 __u32 reserved2;
124 } __attribute__ ((packed)) scsi;
125 struct {
126 __u64 serial_number;
127 __u64 reserved;
128 } __attribute__ ((packed)) usb;
129 struct {
130 __u64 eui;
131 __u64 reserved;
132 } __attribute__ ((packed)) i1394;
133 struct {
134 __u64 wwid;
135 __u64 lun;
136 } __attribute__ ((packed)) fibre;
137 struct {
138 __u64 identity_tag;
139 __u64 reserved;
140 } __attribute__ ((packed)) i2o;
141 struct {
142 __u32 array_number;
143 __u32 reserved1;
144 __u64 reserved2;
145 } __attribute__ ((packed)) raid;
146 struct {
147 __u8 device;
148 __u8 reserved1;
149 __u16 reserved2;
150 __u32 reserved3;
151 __u64 reserved4;
152 } __attribute__ ((packed)) sata;
153 struct {
154 __u64 reserved1;
155 __u64 reserved2;
156 } __attribute__ ((packed)) unknown;
157 } device_path;
158 __u8 reserved4;
159 __u8 checksum;
160} __attribute__ ((packed));
161
162struct edd_info {
163 __u8 device;
164 __u8 version;
165 __u16 interface_support;
166 __u16 legacy_max_cylinder;
167 __u8 legacy_max_head;
168 __u8 legacy_sectors_per_track;
169 struct edd_device_params params;
170} __attribute__ ((packed));
171
172struct edd {
173 unsigned int mbr_signature[EDD_MBR_SIG_MAX];
174 struct edd_info edd_info[EDDMAXNR];
175 unsigned char mbr_signature_nr;
176 unsigned char edd_info_nr;
177};
178
179#ifdef __KERNEL__
180extern struct edd edd;
181#endif /* __KERNEL__ */
182#endif /*!__ASSEMBLY__ */
183
184#endif /* _LINUX_EDD_H */