LXR linux/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
  17extern unsigned long bfin_get_addr_from_rp (u32 *ptr, u32 relval,
  18                                        u32 flags, u32 *persistent);
  19
  20extern 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
  27static 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
  34static 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.  */
  41static inline unsigned long
  42flat_get_relocate_addr (unsigned long relval)
  43{
  44        return relval & 0x03ffffff; /* Mask out top 6 bits */
  45}
  46
  47static 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
  57static inline int flat_addr_absolute(unsigned long relval)
  58{
  59        return (relval & (1 << 29)) != 0;
  60}
  61
  62#endif                          /* __BLACKFIN_FLAT_H__ */
  63