1/* $OpenBSD: kexec.h,v 1.1 2025/11/12 11:34:36 hshoexer Exp $ */
2
3/*
4 * Copyright (c) 2019-2020 Visa Hankala
5 * Copyright (c) 2025 Hans-Joerg Hoexer <hshoexer@yerbouti.franken.de>
6 *
7 * Permission to use, copy, modify, and/or distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19
20#ifndef _MACHINE_KEXEC_H_
21#define _MACHINE_KEXEC_H_
22
23#include <sys/ioccom.h>
24
25#define KEXEC_TRAMPOLINE (35 * NBPG) /* @ 140 Kb */
26#define KEXEC_TRAMP_DATA (36 * NBPG)
27#define PA_KERN (16*1024*1024) /* @ 16 Mb */
28
29#ifndef _LOCORE
30
31#define KEXEC_MAX_ARGS 8 /* maximum number of boot arguments */
32
33struct kexec_args {
34 char *kimg; /* kernel image buffer */
35 size_t klen; /* size of kernel image */
36 int boothowto;
37 u_char bootduid[8];
38};
39
40#define KIOC_KEXEC _IOW('K', 1, struct kexec_args)
41#define KIOC_GETBOOTDUID _IOR('K', 2, u_char[8])
42
43extern unsigned int kexec_size;
44extern void kexec_tramp(vaddr_t, vaddr_t, paddr_t, size_t, vaddr_t);
45
46#endif /* !_LOCORE */
47
48#endif /* _MACHINE_KEXEC_H_ */