xref: /illumos-gate/usr/src/cmd/boot/installgrub/installgrub.h (revision 9890706ed36aa6bfca8ad283fbe4dac12ecd692b)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
23  * Copyright 2016 Nexenta Systems, Inc. All rights reserved.
24  */
25 
26 #ifndef	_INSTALLGRUB_H
27 #define	_INSTALLGRUB_H
28 
29 #ifdef	__cplusplus
30 extern "C" {
31 #endif
32 
33 #include <sys/multiboot.h>
34 #include "./../common/bblk_einfo.h"
35 
36 #define	SECTOR_SIZE	(512)
37 
38 typedef struct _device_data {
39 	char		*path;
40 	char		*path_p0;
41 	uint8_t		type;
42 	int		part_fd;
43 	int		disk_fd;
44 	int		slice;
45 	int		partition;
46 	uint64_t	start_sector;
47 	char		boot_sector[SECTOR_SIZE];
48 } ig_device_t;
49 
50 typedef struct _stage2_data {
51 	char			*buf;
52 	char			*file;
53 	char			*extra;
54 	multiboot_header_t	*mboot;
55 	uint32_t		mboot_off;
56 	uint32_t		file_size;
57 	uint32_t		extra_size;
58 	uint32_t		buf_size;
59 	uint32_t		first_sector;
60 	uint32_t		pcfs_first_sectors[2];
61 } ig_stage2_t;
62 
63 typedef struct _ig_data {
64 	char		stage1_buf[SECTOR_SIZE];
65 	ig_stage2_t	stage2;
66 	ig_device_t	device;
67 } ig_data_t;
68 
69 enum ig_devtype_t {
70 	IG_DEV_X86BOOTPAR = 1,
71 	IG_DEV_SOLVTOC,
72 	IG_DEV_EFI
73 };
74 
75 #define	is_bootpar(type)	(type == IG_DEV_X86BOOTPAR)
76 #define	is_efi(type)		(type == IG_DEV_EFI)
77 
78 #define	STAGE2_MEMADDR		(0x8000)	/* loading addr of stage2 */
79 
80 #define	STAGE1_BPB_OFFSET	(0x3)
81 #define	STAGE1_BPB_SIZE		(0x3B)
82 #define	STAGE1_BOOT_DRIVE	(0x40)
83 #define	STAGE1_FORCE_LBA	(0x41)
84 #define	STAGE1_STAGE2_ADDRESS	(0x42)
85 #define	STAGE1_STAGE2_SECTOR	(0x44)
86 #define	STAGE1_STAGE2_SEGMENT	(0x48)
87 
88 #define	STAGE2_BLOCKLIST	(SECTOR_SIZE - 0x8)
89 #define	STAGE2_INSTALLPART	(SECTOR_SIZE + 0x8)
90 #define	STAGE2_FORCE_LBA	(SECTOR_SIZE + 0x11)
91 #define	STAGE2_BLKOFF(type)	\
92 	(is_efi(type) ? 1024 : 50)	/* offset from start of part */
93 
94 /*
95  * Maximum size of stage2 on EFI-labeled disks. Must not be larger than
96  * VDEV_BOOT_SIZE, defined in usr/src/uts/common/fs/zfs/sys/vdev_impl.h
97  */
98 #define	STAGE2_MAXSIZE		(1ULL << 19)
99 
100 #ifdef	__cplusplus
101 }
102 #endif
103 
104 #endif /* _INSTALLGRUB_H */
105