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 #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 */ 52