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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / c93e305af72a344c66f467899b6277b4d3d94db9 / . / include / linux / edd.h
blob: 992ce7cf9f2ee884880ffd6e74cdfd5fb90a7e16 [file] [log] [blame]
Tom Rini83d290c2018-05-06 17:58:06 -0400[diff] [blame]1/* SPDX-License-Identifier: GPL-2.0 */
Graeme Russ95ffaba2010-04-24 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 Russ95ffaba2010-04-24 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
38
39#define READ_SECTORS 0x02 /* int13 AH=0x02 is READ_SECTORS command */
40#define EDD_MBR_SIG_OFFSET 0x1B8 /* offset of signature in the MBR */
41#define EDD_MBR_SIG_BUF 0x290 /* addr in boot params */
42#define EDD_MBR_SIG_MAX 16 /* max number of signatures to store */
43#define EDD_MBR_SIG_NR_BUF 0x1ea /* addr of number of MBR signtaures at EDD_MBR_SIG_BUF
44 in boot_params - treat this as 1 byte */
45
46#ifndef __ASSEMBLY__
47
48#define EDD_EXT_FIXED_DISK_ACCESS (1 << 0)
49#define EDD_EXT_DEVICE_LOCKING_AND_EJECTING (1 << 1)
50#define EDD_EXT_ENHANCED_DISK_DRIVE_SUPPORT (1 << 2)
51#define EDD_EXT_64BIT_EXTENSIONS (1 << 3)
52
53#define EDD_INFO_DMA_BOUNDARY_ERROR_TRANSPARENT (1 << 0)
54#define EDD_INFO_GEOMETRY_VALID (1 << 1)
55#define EDD_INFO_REMOVABLE (1 << 2)
56#define EDD_INFO_WRITE_VERIFY (1 << 3)
57#define EDD_INFO_MEDIA_CHANGE_NOTIFICATION (1 << 4)
58#define EDD_INFO_LOCKABLE (1 << 5)
59#define EDD_INFO_NO_MEDIA_PRESENT (1 << 6)
60#define EDD_INFO_USE_INT13_FN50 (1 << 7)
61
62struct edd_device_params {
63 __u16 length;
64 __u16 info_flags;
65 __u32 num_default_cylinders;
66 __u32 num_default_heads;
67 __u32 sectors_per_track;
68 __u64 number_of_sectors;
69 __u16 bytes_per_sector;
70 __u32 dpte_ptr; /* 0xFFFFFFFF for our purposes */
71 __u16 key; /* = 0xBEDD */
72 __u8 device_path_info_length; /* = 44 */
73 __u8 reserved2;
74 __u16 reserved3;
75 __u8 host_bus_type[4];
76 __u8 interface_type[8];
77 union {
78 struct {
79 __u16 base_address;
80 __u16 reserved1;
81 __u32 reserved2;
82 } __attribute__ ((packed)) isa;
83 struct {
84 __u8 bus;
85 __u8 slot;
86 __u8 function;
87 __u8 channel;
88 __u32 reserved;
89 } __attribute__ ((packed)) pci;
90 /* pcix is same as pci */
91 struct {
92 __u64 reserved;
93 } __attribute__ ((packed)) ibnd;
94 struct {
95 __u64 reserved;
96 } __attribute__ ((packed)) xprs;
97 struct {
98 __u64 reserved;
99 } __attribute__ ((packed)) htpt;
100 struct {
101 __u64 reserved;
102 } __attribute__ ((packed)) unknown;
103 } interface_path;
104 union {
105 struct {
106 __u8 device;
107 __u8 reserved1;
108 __u16 reserved2;
109 __u32 reserved3;
110 __u64 reserved4;
111 } __attribute__ ((packed)) ata;
112 struct {
113 __u8 device;
114 __u8 lun;
115 __u8 reserved1;
116 __u8 reserved2;
117 __u32 reserved3;
118 __u64 reserved4;
119 } __attribute__ ((packed)) atapi;
120 struct {
121 __u16 id;
122 __u64 lun;
123 __u16 reserved1;
124 __u32 reserved2;
125 } __attribute__ ((packed)) scsi;
126 struct {
127 __u64 serial_number;
128 __u64 reserved;
129 } __attribute__ ((packed)) usb;
130 struct {
131 __u64 eui;
132 __u64 reserved;
133 } __attribute__ ((packed)) i1394;
134 struct {
135 __u64 wwid;
136 __u64 lun;
137 } __attribute__ ((packed)) fibre;
138 struct {
139 __u64 identity_tag;
140 __u64 reserved;
141 } __attribute__ ((packed)) i2o;
142 struct {
143 __u32 array_number;
144 __u32 reserved1;
145 __u64 reserved2;
146 } __attribute__ ((packed)) raid;
147 struct {
148 __u8 device;
149 __u8 reserved1;
150 __u16 reserved2;
151 __u32 reserved3;
152 __u64 reserved4;
153 } __attribute__ ((packed)) sata;
154 struct {
155 __u64 reserved1;
156 __u64 reserved2;
157 } __attribute__ ((packed)) unknown;
158 } device_path;
159 __u8 reserved4;
160 __u8 checksum;
161} __attribute__ ((packed));
162
163struct edd_info {
164 __u8 device;
165 __u8 version;
166 __u16 interface_support;
167 __u16 legacy_max_cylinder;
168 __u8 legacy_max_head;
169 __u8 legacy_sectors_per_track;
170 struct edd_device_params params;
171} __attribute__ ((packed));
172
173struct edd {
174 unsigned int mbr_signature[EDD_MBR_SIG_MAX];
175 struct edd_info edd_info[EDDMAXNR];
176 unsigned char mbr_signature_nr;
177 unsigned char edd_info_nr;
178};
179
180#ifdef __KERNEL__
181extern struct edd edd;
182#endif /* __KERNEL__ */
183#endif /*!__ASSEMBLY__ */
184
185#endif /* _LINUX_EDD_H */