os_info.h

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/*
 * OS info memory interface
 *
 * Copyright IBM Corp. 2012
 * Author(s): Michael Holzheu <[email protected]>
 */
#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_from_oldmem(void *dest, void *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 */