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 (u32 *ptr, u32 relval,
  18                                         u32 flags, u32 *persistent);
  19
  20 extern void bfin_put_addr_at_rp(u32 *ptr, u32 addr, u32 relval);
  21
  22 /* The amount by which a relocation can exceed the program image limits
  23    without being regarded as an error.  */
  24
  25 #define flat_reloc_valid(reloc, size)   ((reloc) <= (size))
  26
  27 static inline int flat_get_addr_from_rp(u32 __user *rp, u32 relval, u32 flags,
  28                                         u32 *addr, u32 *persistent)
  29 {
  30         *addr = bfin_get_addr_from_rp(rp, relval, flags, persistent);
  31         return 0;
  32 }
  33
  34 static inline int flat_put_addr_at_rp(u32 __user *rp, u32 val, u32 relval)
  35 {
  36         bfin_put_addr_at_rp(rp, val, relval);
  37         return 0;
  38 }
  39
  40 /* Convert a relocation entry into an address.  */
  41 static inline unsigned long
  42 flat_get_relocate_addr (unsigned long relval)
  43 {
  44         return relval & 0x03ffffff; /* Mask out top 6 bits */
  45 }
  46
  47 static inline int flat_set_persistent(u32 relval, u32 *persistent)
  48 {
  49         int type = (relval >> 26) & 7;
  50         if (type == 3) {
  51                 *persistent = relval << 16;
  52                 return 1;
  53         }
  54         return 0;
  55 }
  56
  57 static inline int flat_addr_absolute(unsigned long relval)
  58 {
  59         return (relval & (1 << 29)) != 0;
  60 }
  61
  62 #endif                          /* __BLACKFIN_FLAT_H__ */