[deliverable/binutils-gdb.git] / bfd / cpu-avr.c

/* BFD library support routines for the AVR architecture.
   Copyright 1999, 2000, 2002, 2006, 2007 Free Software Foundation, Inc.
   Contributed by Denis Chertykov <denisc@overta.ru>

   This file is part of BFD, the Binary File Descriptor library.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */

#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"

/* This routine is provided two arch_infos and works out which AVR
   machine which would be compatible with both and returns a pointer
   to its info structure.  */

static const bfd_arch_info_type *
compatible (const bfd_arch_info_type * a,
	    const bfd_arch_info_type * b)
{
  /* If a & b are for different architectures we can do nothing.  */
  if (a->arch != b->arch)
    return NULL;

  /* Special case for ATmega[16]03 (avr:3) and ATmega83 (avr:4).  */
  if ((a->mach == bfd_mach_avr3 && b->mach == bfd_mach_avr4)
      || (a->mach == bfd_mach_avr4 && b->mach == bfd_mach_avr3))
    return NULL;

  /* So far all newer AVR architecture cores are supersets of previous
     cores.  */
  if (a->mach <= b->mach)
    return b;

  if (a->mach >= b->mach)
    return a;

  /* Never reached!  */
  return NULL;
}

#define N(addr_bits, machine, print, default, next)		\
{								\
  8,				/* 8 bits in a word.  */	\
  addr_bits,			/* bits in an address.  */	\
  8,				/* 8 bits in a byte.  */	\
  bfd_arch_avr,							\
  machine,			/* Machine number.  */		\
  "avr",			/* Architecture name.   */	\
  print,			/* Printable name.  */		\
  1,				/* Section align power.  */	\
  default,			/* Is this the default ?  */	\
  compatible,							\
  bfd_default_scan,						\
  next								\
}

static const bfd_arch_info_type arch_info_struct[] =
{
  /* AT90S1200, ATtiny1x, ATtiny28.  */
  N (16, bfd_mach_avr1, "avr:1", FALSE, & arch_info_struct[1]),

  /* AT90S2xxx, AT90S4xxx, AT90S8xxx, ATtiny22.  */
  N (16, bfd_mach_avr2, "avr:2", FALSE, & arch_info_struct[2]),

  /* ATmega103, ATmega603.  */
  N (22, bfd_mach_avr3, "avr:3", FALSE, & arch_info_struct[3]),

  /* ATmega83, ATmega85.  */
  N (16, bfd_mach_avr4, "avr:4", FALSE, & arch_info_struct[4]),

  /* ATmega161, ATmega163, ATmega32, AT94K.  */
  N (22, bfd_mach_avr5, "avr:5", FALSE, & arch_info_struct[5]),

  /* ATmega256x.  */
  N (22, bfd_mach_avr6, "avr:6", FALSE, NULL)
};

const bfd_arch_info_type bfd_avr_arch =
  N (16, bfd_mach_avr2, "avr", TRUE, & arch_info_struct[0]);
Commit	Line	Data
adde6300	1	/* BFD library support routines for the AVR architecture.
3db64b00	2	Copyright 1999, 2000, 2002, 2006, 2007 Free Software Foundation, Inc.
adde6300 AM	3	Contributed by Denis Chertykov <denisc@overta.ru>
adde6300 AM	4
4cdc7696	5	This file is part of BFD, the Binary File Descriptor library.
adde6300	6
4cdc7696 NC	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2 of the License, or
	10	(at your option) any later version.
adde6300	11
4cdc7696 NC	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
adde6300	16
4cdc7696 NC	17	You should have received a copy of the GNU General Public License
	18	along with this program; if not, write to the Free Software
	19	Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
adde6300	20
adde6300	21	#include "sysdep.h"
3db64b00	22	#include "bfd.h"
adde6300 AM	23	#include "libbfd.h"
adde6300 AM	24
adde6300 AM	25	/* This routine is provided two arch_infos and works out which AVR
	26	machine which would be compatible with both and returns a pointer
	27	to its info structure. */
	28
	29	static const bfd_arch_info_type *
4cdc7696 NC	30	compatible (const bfd_arch_info_type * a,
4cdc7696 NC	31	const bfd_arch_info_type * b)
adde6300 AM	32	{
	33	/* If a & b are for different architectures we can do nothing. */
	34	if (a->arch != b->arch)
	35	return NULL;
	36
65aa24b6	37	/* Special case for ATmega[16]03 (avr:3) and ATmega83 (avr:4). */
37f45cf8 AM	38	if ((a->mach == bfd_mach_avr3 && b->mach == bfd_mach_avr4)
37f45cf8 AM	39	\|\| (a->mach == bfd_mach_avr4 && b->mach == bfd_mach_avr3))
adde6300 AM	40	return NULL;
	41
	42	/* So far all newer AVR architecture cores are supersets of previous
	43	cores. */
	44	if (a->mach <= b->mach)
	45	return b;
	46
65aa24b6 NC	47	if (a->mach >= b->mach)
	48	return a;
	49
adde6300 AM	50	/* Never reached! */
	51	return NULL;
	52	}
4cdc7696 NC	53
	54	#define N(addr_bits, machine, print, default, next) \
	55	{ \
	56	8, /* 8 bits in a word. */ \
	57	addr_bits, /* bits in an address. */ \
	58	8, /* 8 bits in a byte. */ \
	59	bfd_arch_avr, \
	60	machine, /* Machine number. */ \
	61	"avr", /* Architecture name. */ \
	62	print, /* Printable name. */ \
	63	1, /* Section align power. */ \
	64	default, /* Is this the default ? */ \
	65	compatible, \
	66	bfd_default_scan, \
	67	next \
	68	}
	69
	70	static const bfd_arch_info_type arch_info_struct[] =
	71	{
	72	/* AT90S1200, ATtiny1x, ATtiny28. */
	73	N (16, bfd_mach_avr1, "avr:1", FALSE, & arch_info_struct[1]),
	74
	75	/* AT90S2xxx, AT90S4xxx, AT90S8xxx, ATtiny22. */
	76	N (16, bfd_mach_avr2, "avr:2", FALSE, & arch_info_struct[2]),
	77
	78	/* ATmega103, ATmega603. */
	79	N (22, bfd_mach_avr3, "avr:3", FALSE, & arch_info_struct[3]),
	80
	81	/* ATmega83, ATmega85. */
	82	N (16, bfd_mach_avr4, "avr:4", FALSE, & arch_info_struct[4]),
	83
	84	/* ATmega161, ATmega163, ATmega32, AT94K. */
28c9d252 NC	85	N (22, bfd_mach_avr5, "avr:5", FALSE, & arch_info_struct[5]),
	86
	87	/* ATmega256x. */
	88	N (22, bfd_mach_avr6, "avr:6", FALSE, NULL)
4cdc7696 NC	89	};
	90
	91	const bfd_arch_info_type bfd_avr_arch =
	92	N (16, bfd_mach_avr2, "avr", TRUE, & arch_info_struct[0]);