os_info.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * OS info memory interface
 4 *
 5 * Copyright IBM Corp. 2012
 6 * Author(s): Michael Holzheu <holzheu@linux.vnet.ibm.com>
 7 */
 8#ifndef _ASM_S390_OS_INFO_H
 9#define _ASM_S390_OS_INFO_H
10
11#include <linux/uio.h>
12
13#define OS_INFO_VERSION_MAJOR	1
14#define OS_INFO_VERSION_MINOR	1
15#define OS_INFO_MAGIC		0x4f53494e464f535aULL /* OSINFOSZ */
16
17#define OS_INFO_VMCOREINFO	0
18#define OS_INFO_REIPL_BLOCK	1
19#define OS_INFO_FLAGS_ENTRY	2
20#define OS_INFO_RESERVED	3
21#define OS_INFO_IDENTITY_BASE	4
22#define OS_INFO_KASLR_OFFSET	5
23#define OS_INFO_KASLR_OFF_PHYS	6
24#define OS_INFO_VMEMMAP		7
25#define OS_INFO_AMODE31_START	8
26#define OS_INFO_AMODE31_END	9
27#define OS_INFO_IMAGE_START	10
28#define OS_INFO_IMAGE_END	11
29#define OS_INFO_IMAGE_PHYS	12
30#define OS_INFO_MAX		13
31
32#define OS_INFO_FLAG_REIPL_CLEAR	(1UL << 0)
33
34struct os_info_entry {
35	union {
36		u64	addr;
37		u64	val;
38	};
39	u64	size;
40	u32	csum;
41} __packed;
42
43struct os_info {
44	u64	magic;
45	u32	csum;
46	u16	version_major;
47	u16	version_minor;
48	u64	crashkernel_addr;
49	u64	crashkernel_size;
50	struct os_info_entry entry[OS_INFO_MAX];
51	u8	reserved[3804];
52} __packed;
53
54void os_info_init(void);
55void os_info_entry_add_data(int nr, void *ptr, u64 len);
56void os_info_entry_add_val(int nr, u64 val);
57void os_info_crashkernel_add(unsigned long base, unsigned long size);
58u32 os_info_csum(struct os_info *os_info);
59
60#ifdef CONFIG_CRASH_DUMP
61void *os_info_old_entry(int nr, unsigned long *size);
62static inline unsigned long os_info_old_value(int nr)
63{
64	unsigned long size;
65
66	return (unsigned long)os_info_old_entry(nr, &size);
67}
68#else
69static inline void *os_info_old_entry(int nr, unsigned long *size)
70{
71	return NULL;
72}
73#endif
74
75#endif /* _ASM_S390_OS_INFO_H */