arch/blackfin/include/asm/flat.h

   1 /*
   2  * include/asm-blackfin/flat.h -- uClinux flat-format executables
   3  *
   4  * Copyright (C) 2003,
   5  *
   6  */
   7
   8 #ifndef __BLACKFIN_FLAT_H__
   9 #define __BLACKFIN_FLAT_H__
  10
  11 #include <asm/unaligned.h>
  12
  13 #define flat_argvp_envp_on_stack()              0
  14 #define flat_old_ram_flag(flags)                (flags)
  15
  16 extern unsigned long bfin_get_addr_from_rp (unsigned long *ptr,
  17                                         unsigned long relval,
  18                                         unsigned long flags,
  19                                         unsigned long *persistent);
  20
  21 extern void bfin_put_addr_at_rp(unsigned long *ptr, unsigned long addr,
  22                                 unsigned long relval);
  23
  24 /* The amount by which a relocation can exceed the program image limits
  25    without being regarded as an error.  */
  26
  27 #define flat_reloc_valid(reloc, size)   ((reloc) <= (size))
  28
  29 #define flat_get_addr_from_rp(rp, relval, flags, persistent)    \
  30         bfin_get_addr_from_rp(rp, relval, flags, persistent)
  31 #define flat_put_addr_at_rp(rp, val, relval)    \
  32         bfin_put_addr_at_rp(rp, val, relval)
  33
  34 /* Convert a relocation entry into an address.  */
  35 static inline unsigned long
  36 flat_get_relocate_addr (unsigned long relval)
  37 {
  38         return relval & 0x03ffffff; /* Mask out top 6 bits */
  39 }
  40
  41 static inline int flat_set_persistent(unsigned long relval,
  42                                       unsigned long *persistent)
  43 {
  44         int type = (relval >> 26) & 7;
  45         if (type == 3) {
  46                 *persistent = relval << 16;
  47                 return 1;
  48         }
  49         return 0;
  50 }
  51
  52 static inline int flat_addr_absolute(unsigned long relval)
  53 {
  54         return (relval & (1 << 29)) != 0;
  55 }
  56
  57 #endif                          /* __BLACKFIN_FLAT_H__ */