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 #define OS_INFO_FLAGS_ENTRY     2
  20 #define OS_INFO_RESERVED        3
  21 #define OS_INFO_IDENTITY_BASE   4
  22 #define OS_INFO_KASLR_OFFSET    5
  23 #define OS_INFO_KASLR_OFF_PHYS  6
  24 #define OS_INFO_VMEMMAP         7
  25 #define OS_INFO_AMODE31_START   8
  26 #define OS_INFO_AMODE31_END     9
  27 #define OS_INFO_IMAGE_START     10
  28 #define OS_INFO_IMAGE_END       11
  29 #define OS_INFO_IMAGE_PHYS      12
  30 #define OS_INFO_MAX             13
  31
  32 #define OS_INFO_FLAG_REIPL_CLEAR        (1UL << 0)
  33
  34 struct os_info_entry {
  35         union {
  36                 u64     addr;
  37                 u64     val;
  38         };
  39         u64     size;
  40         u32     csum;
  41 } __packed;
  42
  43 struct os_info {
  44         u64     magic;
  45         u32     csum;
  46         u16     version_major;
  47         u16     version_minor;
  48         u64     crashkernel_addr;
  49         u64     crashkernel_size;
  50         struct os_info_entry entry[OS_INFO_MAX];
  51         u8      reserved[3804];
  52 } __packed;
  53
  54 void os_info_init(void);
  55 void os_info_entry_add_data(int nr, void *ptr, u64 len);
  56 void os_info_entry_add_val(int nr, u64 val);
  57 void os_info_crashkernel_add(unsigned long base, unsigned long size);
  58 u32 os_info_csum(struct os_info *os_info);
  59
  60 #ifdef CONFIG_CRASH_DUMP
  61 void *os_info_old_entry(int nr, unsigned long *size);
  62 static inline unsigned long os_info_old_value(int nr)
  63 {
  64         unsigned long size;
  65
  66         return (unsigned long)os_info_old_entry(nr, &size);
  67 }
  68 #else
  69 static inline void *os_info_old_entry(int nr, unsigned long *size)
  70 {
  71         return NULL;
  72 }
  73 #endif
  74
  75 #endif /* _ASM_S390_OS_INFO_H */