File: mstructs.h

package info (click to toggle)
syslinux 3:6.03+dfsg-14.1+deb9u1
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 41,508 kB
  • sloc: ansic: 358,767; asm: 9,608; pascal: 4,809; perl: 3,894; makefile: 2,486; sh: 315; python: 266; xml: 39
file content (178 lines) | stat: -rw-r--r-- 5,120 bytes parent folder | download | duplicates (7)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
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
/* ----------------------------------------------------------------------- *
 *
 *   Copyright 2001-2009 H. Peter Anvin - All Rights Reserved
 *   Copyright 2009-2010 Intel Corporation; author: H. Peter Anvin
 *   Portions copyright 2009-2010 Shao Miller
 *				  [El Torito code, mBFT, "safe hook"]
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
 *   Boston MA 02111-1307, USA; either version 2 of the License, or
 *   (at your option) any later version; incorporated herein by reference.
 *
 * ----------------------------------------------------------------------- */

/* These structures are common to MEMDISK and MDISKCHK.COM */

#include <stdint.h>
#include "compiler.h"

struct seg_off {
    uint16_t offset;
    uint16_t segment;
};

typedef union {
    struct seg_off seg_off;
    uint32_t uint32;
} real_addr_t;

/* Forward declaration */
struct mBFT;

MEMDISK_PACKED_PREFIX
struct safe_hook {
    uint8_t jump[3];		/* Max. three bytes for jump */
    uint8_t signature[8];	/* "$INT13SF" */
    uint8_t vendor[8];		/* "MEMDISK " */
    real_addr_t old_hook;	/* SEG:OFF for previous INT 13h hook */
    uint32_t flags;		/* "Safe hook" flags */
    /* The next field is a MEMDISK extension to the "safe hook" structure */
    uint32_t mbft;
} MEMDISK_PACKED_POSTFIX;

struct memdisk_header {
    uint16_t int13_offs;
    uint16_t int15_offs;
    uint16_t patch_offs;
    uint16_t total_size;
    uint16_t iret_offs;
    struct safe_hook safe_hook;
};

MEMDISK_PACKED_PREFIX
/* EDD disk parameter table */
struct edd_dpt {
    uint16_t len;		/* Length of table */
    uint16_t flags;		/* Information flags */
    uint32_t c;			/* Physical cylinders (count!) */
    uint32_t h;			/* Physical heads (count!) */
    uint32_t s;			/* Physical sectors/track (count!) */
    uint64_t sectors;		/* Total sectors */
    uint16_t bytespersec;	/* Bytes/sector */
    real_addr_t dpte;		/* DPTE pointer */
    uint16_t dpikey;		/* Device Path Info magic */
    uint8_t  dpilen;		/* Device Path Info length */
    uint8_t  res1;		/* Reserved */
    uint16_t res2;		/* Reserved */
    uint8_t  bustype[4];	/* Host bus type */
    uint8_t  inttype[8];	/* Interface type */
    uint64_t intpath;		/* Interface path */
    uint64_t devpath[2];	/* Device path (double QuadWord!) */
    uint8_t  res3;		/* Reserved */
    uint8_t  chksum;		/* DPI checksum */
} MEMDISK_PACKED_POSTFIX;

/* Requirement for struct edd4_cd_pkt */
#include "../memdisk/eltorito.h"

/* Official MEMDISK Info structure ("MDI") */
MEMDISK_PACKED_PREFIX
struct mdi {
    const uint16_t bytes;
    const uint8_t version_minor;
    const uint8_t version_major;

    uint32_t diskbuf;
    uint32_t disksize;
    real_addr_t cmdline;

    real_addr_t oldint13;
    real_addr_t oldint15;

    uint16_t olddosmem;
    uint8_t bootloaderid;
    uint8_t sector_shift;

    uint16_t dpt_ptr;
} MEMDISK_PACKED_POSTFIX;

/* Requirement for struct acpi_description_header */
#include "../memdisk/acpi.h"

MEMDISK_PACKED_PREFIX
struct mBFT {
    struct acpi_description_header acpi;
    uint32_t safe_hook;		/* "Safe hook" physical address */
    struct mdi mdi;
} MEMDISK_PACKED_POSTFIX;

/* The Disk Parameter Table may be required */
typedef union {
    struct hd_dpt {
	uint16_t max_cyl;	/* Max cylinder */
	uint8_t max_head;	/* Max head */
	uint8_t junk1[5];	/* Obsolete junk, leave at zero */
	uint8_t ctrl;		/* Control byte */
	uint8_t junk2[7];	/* More obsolete junk */
    } hd;
    struct fd_dpt {
	uint8_t specify1;	/* "First specify byte" */
	uint8_t specify2;	/* "Second specify byte" */
	uint8_t delay;		/* Delay until motor turn off */
	uint8_t bps;		/* Bytes/sector (02h = 512) */

	uint8_t sectors;	/* Sectors/track */
	uint8_t isgap;		/* Length of intersector gap */
	uint8_t dlen;		/* Data length (0FFh) */
	uint8_t fgap;		/* Formatting gap */

	uint8_t ffill;		/* Format fill byte */
	uint8_t settle;		/* Head settle time (ms) */
	uint8_t mstart;		/* Motor start time */
	uint8_t maxtrack;	/* Maximum track number */

	uint8_t rate;		/* Data transfer rate */
	uint8_t cmos;		/* CMOS type */
	uint8_t pad[2];

	uint32_t old_fd_dpt;	/* Extension: pointer to old INT 1Eh */
    } fd;
} dpt_t;

MEMDISK_PACKED_PREFIX
struct patch_area {
    struct mdi mdi;

    uint8_t driveshiftlimit;	/* Do not shift drives above this region */
    uint8_t _pad2;		/* Pad to DWORD */
    uint16_t _pad3;		/* Pad to QWORD */

    uint16_t memint1588;

    uint16_t cylinders;
    uint16_t heads;
    uint32_t sectors;

    uint32_t mem1mb;
    uint32_t mem16mb;

    uint8_t driveno;
    uint8_t drivetype;
    uint8_t drivecnt;
    uint8_t configflags;

#define CONFIG_READONLY	0x01
#define CONFIG_RAW	0x02
#define CONFIG_SAFEINT	0x04
#define CONFIG_BIGRAW	0x08	/* MUST be 8! */
#define CONFIG_MODEMASK	0x0e

    uint16_t mystack;
    uint16_t statusptr;

    dpt_t dpt;
    struct edd_dpt edd_dpt;
    struct edd4_cd_pkt cd_pkt;	/* Only really in a memdisk_iso_* hook */
} MEMDISK_PACKED_POSTFIX;