bootinfo.h revision 66458 
1/* $FreeBSD: head/sys/ia64/include/bootinfo.h 66458 2000-09-29 13:46:07Z dfr $ */
2/*
3 * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
4 * All rights reserved.
5 *
6 * Author: Chris G. Demetriou
7 *
8 * Permission to use, copy, modify and distribute this software and
9 * its documentation is hereby granted, provided that both the copyright
10 * notice and this permission notice appear in all copies of the
11 * software, derivative works or modified versions, and any portions
12 * thereof, and that both notices appear in supporting documentation.
13 *
14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
15 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
16 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
17 *
18 * Carnegie Mellon requests users of this software to return to
19 *
20 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
21 *  School of Computer Science
22 *  Carnegie Mellon University
23 *  Pittsburgh PA 15213-3890
24 *
25 * any improvements or extensions that they make and grant Carnegie the
26 * rights to redistribute these changes.
27 */
28
29/*
30 * The boot program passes a pointer (in the boot environment virtual
31 * address address space; "BEVA") to a bootinfo to the kernel using
32 * the following convention:
33 *
34 *	a0 contains first free page frame number
35 *	a1 contains page number of current level 1 page table
36 *	if a2 contains BOOTINFO_MAGIC and a4 is nonzero:
37 *		a3 contains pointer (BEVA) to bootinfo
38 *		a4 contains bootinfo version number
39 *	if a2 contains BOOTINFO_MAGIC and a4 contains 0 (backward compat):
40 *		a3 contains pointer (BEVA) to bootinfo version
41 *		    (u_long), then the bootinfo
42 */
43
44#define	BOOTINFO_MAGIC			0xdeadbeeffeedface
45
46struct bootinfo_v1 {
47	u_long	ssym;			/* 0: start of kernel sym table	*/
48	u_long	esym;			/* 8: end of kernel sym table	*/
49	char	boot_flags[64];		/* 16: boot flags		*/
50	char	booted_kernel[64];	/* 80: name of booted kernel	*/
51	void	*hwrpb;			/* 144: hwrpb pointer (BEVA)	*/
52	u_long	hwrpbsize;		/* 152: size of hwrpb data	*/
53	int	(*cngetc) __P((void));	/* 160: console getc pointer	*/
54	void	(*cnputc) __P((int));	/* 168: console putc pointer	*/
55	void	(*cnpollc) __P((int));	/* 176: console pollc pointer	*/
56	u_long	pad[6];			/* 184: rsvd for future use	*/
57	char	*envp;			/* 232:	start of environment	*/
58	u_long	kernend;		/* 240: end of kernel		*/
59	u_long	modptr;			/* 248: FreeBSD module base	*/
60					/* 256: total size		*/
61};
62
63/*
64 * Kernel-internal structure used to hold important bits of boot
65 * information.  NOT to be used by boot blocks.
66 *
67 * Note that not all of the fields from the bootinfo struct(s)
68 * passed by the boot blocks aren't here (because they're not currently
69 * used by the kernel!).  Fields here which aren't supplied by the
70 * bootinfo structure passed by the boot blocks are supposed to be
71 * filled in at startup with sane contents.
72 */
73struct bootinfo_kernel {
74	u_long	ssym;			/* start of syms */
75	u_long	esym;			/* end of syms */
76	u_long	modptr;			/* FreeBSD module pointer */
77	u_long	kernend;		/* "end of kernel" from boot code */
78	char	*envp;			/* "end of kernel" from boot code */
79	u_long	hwrpb_phys;		/* hwrpb physical address */
80	u_long	hwrpb_size;		/* size of hwrpb data */
81	char	boot_flags[64];		/* boot flags */
82	char	booted_kernel[64];	/* name of booted kernel */
83	char	booted_dev[64];		/* name of booted device */
84};
85
86extern struct bootinfo_kernel bootinfo;
87