arch/s390/include/asm/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 <[email protected]>
   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
  20 struct os_info_entry {
  21         u64     addr;
  22         u64     size;
  23         u32     csum;
  24 } __packed;
  25
  26 struct os_info {
  27         u64     magic;
  28         u32     csum;
  29         u16     version_major;
  30         u16     version_minor;
  31         u64     crashkernel_addr;
  32         u64     crashkernel_size;
  33         struct os_info_entry entry[2];
  34         u8      reserved[4024];
  35 } __packed;
  36
  37 void os_info_init(void);
  38 void os_info_entry_add(int nr, void *ptr, u64 len);
  39 void os_info_crashkernel_add(unsigned long base, unsigned long size);
  40 u32 os_info_csum(struct os_info *os_info);
  41
  42 #ifdef CONFIG_CRASH_DUMP
  43 void *os_info_old_entry(int nr, unsigned long *size);
  44 #else
  45 static inline void *os_info_old_entry(int nr, unsigned long *size)
  46 {
  47         return NULL;
  48 }
  49 #endif
  50
  51 #endif /* _ASM_S390_OS_INFO_H */