/*      $OpenBSD: kexec.h,v 1.1 2025/11/12 11:34:36 hshoexer Exp $      */

/*
 * Copyright (c) 2019-2020 Visa Hankala
 * Copyright (c) 2025 Hans-Joerg Hoexer <hshoexer@yerbouti.franken.de>
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef _MACHINE_KEXEC_H_
#define _MACHINE_KEXEC_H_

#include <sys/ioccom.h>

#define KEXEC_TRAMPOLINE        (35 * NBPG)     /* @ 140 Kb */
#define KEXEC_TRAMP_DATA        (36 * NBPG)
#define PA_KERN                 (16*1024*1024)  /* @ 16 Mb */

#ifndef _LOCORE

#define KEXEC_MAX_ARGS  8       /* maximum number of boot arguments */

struct kexec_args {
        char            *kimg;          /* kernel image buffer */
        size_t          klen;           /* size of kernel image */
        int             boothowto;
        u_char          bootduid[8];
};

#define KIOC_KEXEC              _IOW('K', 1, struct kexec_args)
#define KIOC_GETBOOTDUID        _IOR('K', 2, u_char[8])

extern unsigned int     kexec_size;
extern void             kexec_tramp(vaddr_t, vaddr_t, paddr_t, size_t, vaddr_t);

#endif  /* !_LOCORE */

#endif /* _MACHINE_KEXEC_H_ */