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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 */