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/* SPDX-License-Identifier: GPL-2.0 */
/*
* OS info memory interface
*
* Copyright IBM Corp. 2012
* Author(s): Michael Holzheu <holzheu@linux.vnet.ibm.com>
*/
#ifndef _ASM_S390_OS_INFO_H
#define _ASM_S390_OS_INFO_H
#define OS_INFO_VERSION_MAJOR 1
#define OS_INFO_VERSION_MINOR 1
#define OS_INFO_MAGIC 0x4f53494e464f535aULL /* OSINFOSZ */
#define OS_INFO_VMCOREINFO 0
#define OS_INFO_REIPL_BLOCK 1
struct os_info_entry {
u64 addr;
u64 size;
u32 csum;
} __packed;
struct os_info {
u64 magic;
u32 csum;
u16 version_major;
u16 version_minor;
u64 crashkernel_addr;
u64 crashkernel_size;
struct os_info_entry entry[2];
u8 reserved[4024];
} __packed;
void os_info_init(void);
void os_info_entry_add(int nr, void *ptr, u64 len);
void os_info_crashkernel_add(unsigned long base, unsigned long size);
u32 os_info_csum(struct os_info *os_info);
#ifdef CONFIG_CRASH_DUMP
void *os_info_old_entry(int nr, unsigned long *size);
int copy_oldmem_kernel(void *dst, unsigned long src, size_t count);
#else
static inline void *os_info_old_entry(int nr, unsigned long *size)
{
return NULL;
}
#endif
#endif /* _ASM_S390_OS_INFO_H */