include/linux/crash_dump.h

   1 #ifndef LINUX_CRASH_DUMP_H
   2 #define LINUX_CRASH_DUMP_H
   3
   4 #ifdef CONFIG_CRASH_DUMP
   5 #include <linux/kexec.h>
   6 #include <linux/smp_lock.h>
   7 #include <linux/device.h>
   8 #include <linux/proc_fs.h>
   9
  10 #define ELFCORE_ADDR_MAX        (-1ULL)
  11
  12 #ifdef CONFIG_PROC_VMCORE
  13 extern unsigned long long elfcorehdr_addr;
  14 #else
  15 static const unsigned long long elfcorehdr_addr = ELFCORE_ADDR_MAX;
  16 #endif
  17
  18 extern ssize_t copy_oldmem_page(unsigned long, char *, size_t,
  19                                                 unsigned long, int);
  20 extern const struct file_operations proc_vmcore_operations;
  21 extern struct proc_dir_entry *proc_vmcore;
  22
  23 /* Architecture code defines this if there are other possible ELF
  24  * machine types, e.g. on bi-arch capable hardware. */
  25 #ifndef vmcore_elf_check_arch_cross
  26 #define vmcore_elf_check_arch_cross(x) 0
  27 #endif
  28
  29 #define vmcore_elf_check_arch(x) (elf_check_arch(x) || vmcore_elf_check_arch_cross(x))
  30
  31 static inline int is_kdump_kernel(void)
  32 {
  33         return (elfcorehdr_addr != ELFCORE_ADDR_MAX) ? 1 : 0;
  34 }
  35 #else /* !CONFIG_CRASH_DUMP */
  36 static inline int is_kdump_kernel(void) { return 0; }
  37 #endif /* CONFIG_CRASH_DUMP */
  38
  39 extern unsigned long saved_max_pfn;
  40 #endif /* LINUX_CRASHDUMP_H */