text: /* SPDX-License-Identifier: GPL-2.0 */
  #ifndef LINUX_CRASH_CORE_H
  #define LINUX_CRASH_CORE_H
  
  #include <linux/linkage.h>
  #include <linux/elfcore.h>
  #include <linux/elf.h>
  
  #define CRASH_CORE_NOTE_NAME	   "CORE"
  #define CRASH_CORE_NOTE_HEAD_BYTES ALIGN(sizeof(struct elf_note), 4)
  #define CRASH_CORE_NOTE_NAME_BYTES ALIGN(sizeof(CRASH_CORE_NOTE_NAME), 4)
  #define CRASH_CORE_NOTE_DESC_BYTES ALIGN(sizeof(struct elf_prstatus), 4)
  
  /*
   * The per-cpu notes area is a list of notes terminated by a "NULL"
   * note header.  For kdump, the code in vmcore.c runs in the context
   * of the second kernel to combine them into one note.
   */
  #define CRASH_CORE_NOTE_BYTES	   ((CRASH_CORE_NOTE_HEAD_BYTES * 2) +	\
  				     CRASH_CORE_NOTE_NAME_BYTES +	\
  				     CRASH_CORE_NOTE_DESC_BYTES)
  
  #define VMCOREINFO_BYTES	   PAGE_SIZE
  #define VMCOREINFO_NOTE_NAME	   "VMCOREINFO"
  #define VMCOREINFO_NOTE_NAME_BYTES ALIGN(sizeof(VMCOREINFO_NOTE_NAME), 4)
  #define VMCOREINFO_NOTE_SIZE	   ((CRASH_CORE_NOTE_HEAD_BYTES * 2) +	\
  				     VMCOREINFO_NOTE_NAME_BYTES +	\
  				     VMCOREINFO_BYTES)
  
  typedef u32 note_buf_t[CRASH_CORE_NOTE_BYTES/4];
  
  void crash_update_vmcoreinfo_safecopy(void *ptr);
  void crash_save_vmcoreinfo(void);
  void arch_crash_save_vmcoreinfo(void);
  __printf(1, 2)
  void vmcoreinfo_append_str(const char *fmt, ...);
  phys_addr_t paddr_vmcoreinfo_note(void);
  
  #define VMCOREINFO_OSRELEASE(value) \
  	vmcoreinfo_append_str("OSRELEASE=%s\n", value)
  #define VMCOREINFO_PAGESIZE(value) \
  	vmcoreinfo_append_str("PAGESIZE=%ld\n", value)
  #define VMCOREINFO_SYMBOL(name) \
  	vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)&name)
  #define VMCOREINFO_SIZE(name) \
  	vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
  			      (unsigned long)sizeof(name))
  #define VMCOREINFO_STRUCT_SIZE(name) \
  	vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
  			      (unsigned long)sizeof(struct name))
  #define VMCOREINFO_OFFSET(name, field) \
  	vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \
  			      (unsigned long)offsetof(struct name, field))
  #define VMCOREINFO_LENGTH(name, value) \
  	vmcoreinfo_append_str("LENGTH(%s)=%lu\n", #name, (unsigned long)value)
  #define VMCOREINFO_NUMBER(name) \
  	vmcoreinfo_append_str("NUMBER(%s)=%ld\n", #name, (long)name)
  #define VMCOREINFO_CONFIG(name) \
  	vmcoreinfo_append_str("CONFIG_%s=y\n", #name)
  
  extern u32 *vmcoreinfo_note;
  
  Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type,
  			  void *data, size_t data_len);
  void final_note(Elf_Word *buf);
  
  int __init parse_crashkernel(char *cmdline, unsigned long long system_ram,
  		unsigned long long *crash_size, unsigned long long *crash_base);
  int parse_crashkernel_high(char *cmdline, unsigned long long system_ram,
  		unsigned long long *crash_size, unsigned long long *crash_base);
  int parse_crashkernel_low(char *cmdline, unsigned long long system_ram,
  		unsigned long long *crash_size, unsigned long long *crash_base);
  
  #endif /* LINUX_CRASH_CORE_H */
  