arch/blackfin/include/asm/flat.h

   1 /*
   2  * uClinux flat-format executables
   3  *
   4  * Copyright 2003-2009 Analog Devices Inc.
   5  *
   6  * Licensed under the GPL-2
   7  */
   8
   9 #ifndef __BLACKFIN_FLAT_H__
  10 #define __BLACKFIN_FLAT_H__
  11
  12 #include <asm/unaligned.h>
  13
  14 #define flat_argvp_envp_on_stack()              0
  15 #define flat_old_ram_flag(flags)                (flags)
  16
  17 extern unsigned long bfin_get_addr_from_rp (unsigned long *ptr,
  18                                         unsigned long relval,
  19                                         unsigned long flags,
  20                                         unsigned long *persistent);
  21
  22 extern void bfin_put_addr_at_rp(unsigned long *ptr, unsigned long addr,
  23                                 unsigned long relval);
  24
  25 /* The amount by which a relocation can exceed the program image limits
  26    without being regarded as an error.  */
  27
  28 #define flat_reloc_valid(reloc, size)   ((reloc) <= (size))
  29
  30 #define flat_get_addr_from_rp(rp, relval, flags, persistent)    \
  31         bfin_get_addr_from_rp(rp, relval, flags, persistent)
  32 #define flat_put_addr_at_rp(rp, val, relval)    \
  33         bfin_put_addr_at_rp(rp, val, relval)
  34
  35 /* Convert a relocation entry into an address.  */
  36 static inline unsigned long
  37 flat_get_relocate_addr (unsigned long relval)
  38 {
  39         return relval & 0x03ffffff; /* Mask out top 6 bits */
  40 }
  41
  42 static inline int flat_set_persistent(unsigned long relval,
  43                                       unsigned long *persistent)
  44 {
  45         int type = (relval >> 26) & 7;
  46         if (type == 3) {
  47                 *persistent = relval << 16;
  48                 return 1;
  49         }
  50         return 0;
  51 }
  52
  53 static inline int flat_addr_absolute(unsigned long relval)
  54 {
  55         return (relval & (1 << 29)) != 0;
  56 }
  57
  58 #endif                          /* __BLACKFIN_FLAT_H__ */