include/reloc.h

   1 #ifndef __RELOC_H
   2 #define __RELOC_H
   3
   4 extern unsigned long _barebox_start, _bss_start, _bss_end, _text_base;
   5
   6 #ifdef CONFIG_HAS_EARLY_INIT
   7
   8 extern ulong __early_init_data_begin, __early_init_data_end;
   9
  10 /*
  11  * The difference between our link address and the address we're
  12  * currently running at.
  13  */
  14 unsigned long reloc_offset(void);
  15
  16 /*
  17  * When not running at link address, relocate a pointer by
  18  * taking reloc_offset() into account
  19  */
  20 #define RELOC(a) (typeof(*a) *)((unsigned long)a + reloc_offset())
  21
  22 /*
  23  * dito, used for variables
  24  */
  25 #define RELOC_VAR(v) *(typeof(v)* )((unsigned long)&v + reloc_offset())
  26
  27 void early_init(void);
  28
  29 /*
  30  * put a variable into early init RAM. This section will
  31  * be relocated into SRAM during early init
  32  */
  33 #define __initdata      __attribute__ ((__section__ (".early_init_data")))
  34
  35 /* Access init data */
  36 #define INITDATA(var) *(typeof(var) *)((ulong)(&var) - \
  37                 (ulong)&__early_init_data_begin + \
  38                 (ulong)RELOC_VAR(init_data_ptr))
  39
  40 extern void *init_data_ptr;
  41
  42 #else
  43
  44 static inline int reloc_offset(void)
  45 {
  46         return 0;
  47 }
  48
  49 static inline void early_init(void)
  50 {
  51 }
  52
  53 #define RELOC(a) a
  54 #define RELOC_VAR(v) v
  55
  56 #define __initdata
  57
  58 #define INITDATA(var)   var
  59
  60 #endif /* CONFIG_HAS_EARLY_INIT */
  61
  62 #endif /* __RELOC_H */