1/*
2 * This file and its contents are supplied under the terms of the
3 * Common Development and Distribution License ("CDDL"), version 1.0.
4 * You may only use this file in accordance with the terms of version
5 * 1.0 of the CDDL.
6 *
7 * A full copy of the text of the CDDL should have accompanied this
8 * source.  A copy of the CDDL is also available via the Internet at
9 * http://www.illumos.org/license/CDDL.
10 */
11
12/*
13 * Copyright 2015 Toomas Soome <tsoome@me.com>
14 */
15
16#ifndef _LINUX_H
17#define	_LINUX_H
18
19#ifdef __cplusplus
20extern "C" {
21#endif
22
23#ifndef ASM_FILE
24/* For the Linux/i386 boot protocol version 2.10.  */
25struct linux_kernel_header
26{
27  uint8_t code1[0x0020];
28  uint16_t cl_magic;               /* Magic number 0xA33F */
29  uint16_t cl_offset;              /* The offset of command line */
30  uint8_t code2[0x01F1 - 0x0020 - 2 - 2];
31  uint8_t setup_sects;             /* The size of the setup in sectors */
32  uint16_t root_flags;             /* If the root is mounted readonly */
33  uint16_t syssize;                /* obsolete */
34  uint16_t swap_dev;               /* obsolete */
35  uint16_t ram_size;               /* obsolete */
36  uint16_t vid_mode;               /* Video mode control */
37  uint16_t root_dev;               /* Default root device number */
38  uint16_t boot_flag;              /* 0xAA55 magic number */
39  uint16_t jump;                   /* Jump instruction */
40  uint32_t header;                 /* Magic signature "HdrS" */
41  uint16_t version;                /* Boot protocol version supported */
42  uint32_t realmode_swtch;         /* Boot loader hook */
43  uint16_t start_sys;              /* The load-low segment (obsolete) */
44  uint16_t kernel_version;         /* Points to kernel version string */
45  uint8_t type_of_loader;          /* Boot loader identifier */
46  uint8_t loadflags;               /* Boot protocol option flags */
47  uint16_t setup_move_size;        /* Move to high memory size */
48  uint32_t code32_start;           /* Boot loader hook */
49  uint32_t ramdisk_image;          /* initrd load address */
50  uint32_t ramdisk_size;           /* initrd size */
51  uint32_t bootsect_kludge;        /* obsolete */
52  uint16_t heap_end_ptr;           /* Free memory after setup end */
53  uint16_t pad1;                   /* Unused */
54  uint32_t cmd_line_ptr;           /* Points to the kernel command line */
55  uint32_t initrd_addr_max;        /* Highest address for initrd */
56  uint32_t kernel_alignment;
57  uint8_t relocatable;
58  uint8_t min_alignment;
59  uint8_t pad[2];
60  uint32_t cmdline_size;
61  uint32_t hardware_subarch;
62  uint64_t hardware_subarch_data;
63  uint32_t payload_offset;
64  uint32_t payload_length;
65  uint64_t setup_data;
66  uint64_t pref_address;
67  uint32_t init_size;
68} __attribute__ ((packed));
69#endif
70
71#define	LINUX_VID_MODE_NORMAL		0xFFFF
72#define	LINUX_VID_MODE_EXTENDED		0xFFFE
73#define	LINUX_VID_MODE_ASK		0xFFFD
74
75#define	BOOTSEC_SIGNATURE		0xAA55
76#define	LINUX_BOOT_LOADER_TYPE		0x72
77#define	LINUX_BZIMAGE_ADDR		0x100000
78#define	LINUX_CL_END_OFFSET		0x90FF
79#define	LINUX_CL_MAGIC			0xA33F
80#define	LINUX_CL_OFFSET			0x9000
81#define	LINUX_DEFAULT_SETUP_SECTS	4
82#define	LINUX_ESP			0x9000
83#define	LINUX_FLAG_BIG_KERNEL		0x1
84#define	LINUX_FLAG_CAN_USE_HEAP		0x80
85#define	LINUX_HEAP_END_OFFSET		(0x9000 - 0x200)
86#define	LINUX_MAGIC_SIGNATURE		0x53726448
87#define	LINUX_MAX_SETUP_SECTS		64
88#define	LINUX_OLD_REAL_MODE_ADDR	0x90000
89#define	LINUX_SETUP_MOVE_SIZE		0x9100
90#define	LINUX_ZIMAGE_ADDR		0x10000
91#define	LINUX_INITRD_MAX_ADDRESS	0x38000000
92
93#ifdef __cplusplus
94}
95#endif
96
97#endif /* _LINUX_H */
98