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