1/*
2 * OS info memory interface
3 *
4 * Copyright IBM Corp. 2012
5 * Author(s): Michael Holzheu <holzheu@linux.vnet.ibm.com>
6 */
7#ifndef _ASM_S390_OS_INFO_H
8#define _ASM_S390_OS_INFO_H
9
10#define OS_INFO_VERSION_MAJOR	1
11#define OS_INFO_VERSION_MINOR	1
12#define OS_INFO_MAGIC		0x4f53494e464f535aULL /* OSINFOSZ */
13
14#define OS_INFO_VMCOREINFO	0
15#define OS_INFO_REIPL_BLOCK	1
16
17struct os_info_entry {
18	u64	addr;
19	u64	size;
20	u32	csum;
21} __packed;
22
23struct os_info {
24	u64	magic;
25	u32	csum;
26	u16	version_major;
27	u16	version_minor;
28	u64	crashkernel_addr;
29	u64	crashkernel_size;
30	struct os_info_entry entry[2];
31	u8	reserved[4024];
32} __packed;
33
34void os_info_init(void);
35void os_info_entry_add(int nr, void *ptr, u64 len);
36void os_info_crashkernel_add(unsigned long base, unsigned long size);
37u32 os_info_csum(struct os_info *os_info);
38
39#ifdef CONFIG_CRASH_DUMP
40void *os_info_old_entry(int nr, unsigned long *size);
41int copy_from_oldmem(void *dest, void *src, size_t count);
42#else
43static inline void *os_info_old_entry(int nr, unsigned long *size)
44{
45	return NULL;
46}
47#endif
48
49#endif /* _ASM_S390_OS_INFO_H */
50