flat.h

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/*
 * uClinux flat-format executables
 *
 * Copyright 2003-2009 Analog Devices Inc.
 *
 * Licensed under the GPL-2
 */

#ifndef __BLACKFIN_FLAT_H__
#define __BLACKFIN_FLAT_H__

#include <asm/unaligned.h>

#define flat_argvp_envp_on_stack()      0
#define flat_old_ram_flag(flags)        (flags)

extern unsigned long bfin_get_addr_from_rp (unsigned long *ptr,
                    unsigned long relval,
                    unsigned long flags,
                    unsigned long *persistent);

extern void bfin_put_addr_at_rp(unsigned long *ptr, unsigned long addr,
                        unsigned long relval);

/* The amount by which a relocation can exceed the program image limits
   without being regarded as an error.  */

#define flat_reloc_valid(reloc, size)   ((reloc) <= (size))

#define flat_get_addr_from_rp(rp, relval, flags, persistent)    \
    bfin_get_addr_from_rp(rp, relval, flags, persistent)
#define flat_put_addr_at_rp(rp, val, relval)    \
    bfin_put_addr_at_rp(rp, val, relval)

/* Convert a relocation entry into an address.  */
static inline unsigned long
flat_get_relocate_addr (unsigned long relval)
{
    return relval & 0x03ffffff; /* Mask out top 6 bits */
}

static inline int flat_set_persistent(unsigned long relval,
                      unsigned long *persistent)
{
    int type = (relval >> 26) & 7;
    if (type == 3) {
        *persistent = relval << 16;
        return 1;
    }
    return 0;
}

static inline int flat_addr_absolute(unsigned long relval)
{
    return (relval & (1 << 29)) != 0;
}

#endif              /* __BLACKFIN_FLAT_H__ */