1/* ----------------------------------------------------------------------- *
2 *
3 *   Copyright 2001-2009 H. Peter Anvin - All Rights Reserved
4 *   Copyright 2009-2010 Intel Corporation; author: H. Peter Anvin
5 *   Portions copyright 2009-2010 Shao Miller
6 *				  [El Torito code, mBFT, "safe hook"]
7 *
8 *   This program is free software; you can redistribute it and/or modify
9 *   it under the terms of the GNU General Public License as published by
10 *   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
11 *   Boston MA 02111-1307, USA; either version 2 of the License, or
12 *   (at your option) any later version; incorporated herein by reference.
13 *
14 * ----------------------------------------------------------------------- */
15
16/* These structures are common to MEMDISK and MDISKCHK.COM */
17
18#include <stdint.h>
19#include "compiler.h"
20
21struct seg_off {
22    uint16_t offset;
23    uint16_t segment;
24};
25
26typedef union {
27    struct seg_off seg_off;
28    uint32_t uint32;
29} real_addr_t;
30
31/* Forward declaration */
32struct mBFT;
33
34MEMDISK_PACKED_PREFIX
35struct safe_hook {
36    uint8_t jump[3];		/* Max. three bytes for jump */
37    uint8_t signature[8];	/* "$INT13SF" */
38    uint8_t vendor[8];		/* "MEMDISK " */
39    real_addr_t old_hook;	/* SEG:OFF for previous INT 13h hook */
40    uint32_t flags;		/* "Safe hook" flags */
41    /* The next field is a MEMDISK extension to the "safe hook" structure */
42    uint32_t mbft;
43} MEMDISK_PACKED_POSTFIX;
44
45struct memdisk_header {
46    uint16_t int13_offs;
47    uint16_t int15_offs;
48    uint16_t patch_offs;
49    uint16_t total_size;
50    uint16_t iret_offs;
51    struct safe_hook safe_hook;
52};
53
54MEMDISK_PACKED_PREFIX
55/* EDD disk parameter table */
56struct edd_dpt {
57    uint16_t len;		/* Length of table */
58    uint16_t flags;		/* Information flags */
59    uint32_t c;			/* Physical cylinders (count!) */
60    uint32_t h;			/* Physical heads (count!) */
61    uint32_t s;			/* Physical sectors/track (count!) */
62    uint64_t sectors;		/* Total sectors */
63    uint16_t bytespersec;	/* Bytes/sector */
64    real_addr_t dpte;		/* DPTE pointer */
65    uint16_t dpikey;		/* Device Path Info magic */
66    uint8_t  dpilen;		/* Device Path Info length */
67    uint8_t  res1;		/* Reserved */
68    uint16_t res2;		/* Reserved */
69    uint8_t  bustype[4];	/* Host bus type */
70    uint8_t  inttype[8];	/* Interface type */
71    uint64_t intpath;		/* Interface path */
72    uint64_t devpath[2];	/* Device path (double QuadWord!) */
73    uint8_t  res3;		/* Reserved */
74    uint8_t  chksum;		/* DPI checksum */
75} MEMDISK_PACKED_POSTFIX;
76
77/* Requirement for struct edd4_cd_pkt */
78#include "../memdisk/eltorito.h"
79
80/* Official MEMDISK Info structure ("MDI") */
81MEMDISK_PACKED_PREFIX
82struct mdi {
83    const uint16_t bytes;
84    const uint8_t version_minor;
85    const uint8_t version_major;
86
87    uint32_t diskbuf;
88    uint32_t disksize;
89    real_addr_t cmdline;
90
91    real_addr_t oldint13;
92    real_addr_t oldint15;
93
94    uint16_t olddosmem;
95    uint8_t bootloaderid;
96    uint8_t sector_shift;
97
98    uint16_t dpt_ptr;
99} MEMDISK_PACKED_POSTFIX;
100
101/* Requirement for struct acpi_description_header */
102#include "../memdisk/acpi.h"
103
104MEMDISK_PACKED_PREFIX
105struct mBFT {
106    struct acpi_description_header acpi;
107    uint32_t safe_hook;		/* "Safe hook" physical address */
108    struct mdi mdi;
109} MEMDISK_PACKED_POSTFIX;
110
111/* The Disk Parameter Table may be required */
112typedef union {
113    struct hd_dpt {
114	uint16_t max_cyl;	/* Max cylinder */
115	uint8_t max_head;	/* Max head */
116	uint8_t junk1[5];	/* Obsolete junk, leave at zero */
117	uint8_t ctrl;		/* Control byte */
118	uint8_t junk2[7];	/* More obsolete junk */
119    } hd;
120    struct fd_dpt {
121	uint8_t specify1;	/* "First specify byte" */
122	uint8_t specify2;	/* "Second specify byte" */
123	uint8_t delay;		/* Delay until motor turn off */
124	uint8_t bps;		/* Bytes/sector (02h = 512) */
125
126	uint8_t sectors;	/* Sectors/track */
127	uint8_t isgap;		/* Length of intersector gap */
128	uint8_t dlen;		/* Data length (0FFh) */
129	uint8_t fgap;		/* Formatting gap */
130
131	uint8_t ffill;		/* Format fill byte */
132	uint8_t settle;		/* Head settle time (ms) */
133	uint8_t mstart;		/* Motor start time */
134	uint8_t maxtrack;	/* Maximum track number */
135
136	uint8_t rate;		/* Data transfer rate */
137	uint8_t cmos;		/* CMOS type */
138	uint8_t pad[2];
139
140	uint32_t old_fd_dpt;	/* Extension: pointer to old INT 1Eh */
141    } fd;
142} dpt_t;
143
144MEMDISK_PACKED_PREFIX
145struct patch_area {
146    struct mdi mdi;
147
148    uint8_t driveshiftlimit;	/* Do not shift drives above this region */
149    uint8_t _pad2;		/* Pad to DWORD */
150    uint16_t _pad3;		/* Pad to QWORD */
151
152    uint16_t memint1588;
153
154    uint16_t cylinders;
155    uint16_t heads;
156    uint32_t sectors;
157
158    uint32_t mem1mb;
159    uint32_t mem16mb;
160
161    uint8_t driveno;
162    uint8_t drivetype;
163    uint8_t drivecnt;
164    uint8_t configflags;
165
166#define CONFIG_READONLY	0x01
167#define CONFIG_RAW	0x02
168#define CONFIG_SAFEINT	0x04
169#define CONFIG_BIGRAW	0x08	/* MUST be 8! */
170#define CONFIG_MODEMASK	0x0e
171
172    uint16_t mystack;
173    uint16_t statusptr;
174
175    dpt_t dpt;
176    struct edd_dpt edd_dpt;
177    struct edd4_cd_pkt cd_pkt;	/* Only really in a memdisk_iso_* hook */
178} MEMDISK_PACKED_POSTFIX;
179