1#ifndef _UAPILINUX_KEXEC_H
2#define _UAPILINUX_KEXEC_H
3
4/* kexec system call -  It loads the new kernel to boot into.
5 * kexec does not sync, or unmount filesystems so if you need
6 * that to happen you need to do that yourself.
7 */
8
9#include <linux/types.h>
10
11/* kexec flags for different usage scenarios */
12#define KEXEC_ON_CRASH		0x00000001
13#define KEXEC_PRESERVE_CONTEXT	0x00000002
14#define KEXEC_ARCH_MASK		0xffff0000
15
16/* These values match the ELF architecture values.
17 * Unless there is a good reason that should continue to be the case.
18 */
19#define KEXEC_ARCH_DEFAULT ( 0 << 16)
20#define KEXEC_ARCH_386     ( 3 << 16)
21#define KEXEC_ARCH_68K     ( 4 << 16)
22#define KEXEC_ARCH_X86_64  (62 << 16)
23#define KEXEC_ARCH_PPC     (20 << 16)
24#define KEXEC_ARCH_PPC64   (21 << 16)
25#define KEXEC_ARCH_IA_64   (50 << 16)
26#define KEXEC_ARCH_ARM     (40 << 16)
27#define KEXEC_ARCH_S390    (22 << 16)
28#define KEXEC_ARCH_SH      (42 << 16)
29#define KEXEC_ARCH_MIPS_LE (10 << 16)
30#define KEXEC_ARCH_MIPS    ( 8 << 16)
31
32/* The artificial cap on the number of segments passed to kexec_load. */
33#define KEXEC_SEGMENT_MAX 16
34
35#ifndef __KERNEL__
36/*
37 * This structure is used to hold the arguments that are used when
38 * loading  kernel binaries.
39 */
40struct kexec_segment {
41	const void *buf;
42	size_t bufsz;
43	const void *mem;
44	size_t memsz;
45};
46
47/* Load a new kernel image as described by the kexec_segment array
48 * consisting of passed number of segments at the entry-point address.
49 * The flags allow different useage types.
50 */
51extern int kexec_load(void *, size_t, struct kexec_segment *,
52		unsigned long int);
53#endif /* __KERNEL__ */
54
55#endif /* _UAPILINUX_KEXEC_H */
56