arch/s390/include/asm/os_info.h

   1 /*
   2  * OS info memory interface
   3  *
   4  * Copyright IBM Corp. 2012
   5  * Author(s): Michael Holzheu <[email protected]>
   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
  17 struct os_info_entry {
  18         u64     addr;
  19         u64     size;
  20         u32     csum;
  21 } __packed;
  22
  23 struct 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
  34 void os_info_init(void);
  35 void os_info_entry_add(int nr, void *ptr, u64 len);
  36 void os_info_crashkernel_add(unsigned long base, unsigned long size);
  37 u32 os_info_csum(struct os_info *os_info);
  38
  39 #ifdef CONFIG_CRASH_DUMP
  40 void *os_info_old_entry(int nr, unsigned long *size);
  41 int copy_from_oldmem(void *dest, void *src, size_t count);
  42 #else
  43 static 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 */