kernel/fs/pstore/internal.h

   1 #ifndef __PSTORE_INTERNAL_H__
   2 #define __PSTORE_INTERNAL_H__
   3
   4 #include <linux/types.h>
   5 #include <linux/time.h>
   6 #include <linux/pstore.h>
   7
   8 #if NR_CPUS <= 2 && defined(CONFIG_ARM_THUMB)
   9 #define PSTORE_CPU_IN_IP 0x1
  10 #elif NR_CPUS <= 4 && defined(CONFIG_ARM)
  11 #define PSTORE_CPU_IN_IP 0x3
  12 #endif
  13
  14 struct pstore_ftrace_record {
  15         unsigned long ip;
  16         unsigned long parent_ip;
  17 #ifndef PSTORE_CPU_IN_IP
  18         unsigned int cpu;
  19 #endif
  20 };
  21
  22 static inline void
  23 pstore_ftrace_encode_cpu(struct pstore_ftrace_record *rec, unsigned int cpu)
  24 {
  25 #ifndef PSTORE_CPU_IN_IP
  26         rec->cpu = cpu;
  27 #else
  28         rec->ip |= cpu;
  29 #endif
  30 }
  31
  32 static inline unsigned int
  33 pstore_ftrace_decode_cpu(struct pstore_ftrace_record *rec)
  34 {
  35 #ifndef PSTORE_CPU_IN_IP
  36         return rec->cpu;
  37 #else
  38         return rec->ip & PSTORE_CPU_IN_IP;
  39 #endif
  40 }
  41
  42 #ifdef CONFIG_PSTORE_FTRACE
  43 extern void pstore_register_ftrace(void);
  44 extern void pstore_unregister_ftrace(void);
  45 #else
  46 static inline void pstore_register_ftrace(void) {}
  47 static inline void pstore_unregister_ftrace(void) {}
  48 #endif
  49
  50 #ifdef CONFIG_PSTORE_PMSG
  51 extern void pstore_register_pmsg(void);
  52 extern void pstore_unregister_pmsg(void);
  53 #else
  54 static inline void pstore_register_pmsg(void) {}
  55 static inline void pstore_unregister_pmsg(void) {}
  56 #endif
  57
  58 extern struct pstore_info *psinfo;
  59
  60 extern void     pstore_set_kmsg_bytes(int);
  61 extern void     pstore_get_records(int);
  62 extern int      pstore_mkfile(enum pstore_type_id, char *psname, u64 id,
  63                               int count, char *data, bool compressed,
  64                               size_t size, struct timespec time,
  65                               struct pstore_info *psi);
  66 extern bool     pstore_is_mounted(void);
  67
  68 #endif