1/* BFD library support routines for the AVR architecture.
2   Copyright 1999, 2000, 2002, 2006 Free Software Foundation, Inc.
3   Contributed by Denis Chertykov <denisc@overta.ru>
4
5   This file is part of BFD, the Binary File Descriptor library.
6
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.
11
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.
16
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.  */
20
21#include "bfd.h"
22#include "sysdep.h"
23#include "libbfd.h"
24
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
29static const bfd_arch_info_type *
30compatible (const bfd_arch_info_type * a,
31	    const bfd_arch_info_type * b)
32{
33  /* If a & b are for different architectures we can do nothing.  */
34  if (a->arch != b->arch)
35    return NULL;
36
37  /* Special case for ATmega[16]03 (avr:3) and ATmega83 (avr:4).  */
38  if ((a->mach == bfd_mach_avr3 && b->mach == bfd_mach_avr4)
39      || (a->mach == bfd_mach_avr4 && b->mach == bfd_mach_avr3))
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
47  if (a->mach >= b->mach)
48    return a;
49
50  /* Never reached!  */
51  return NULL;
52}
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
70static 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.  */
85  N (22, bfd_mach_avr5, "avr:5", FALSE, NULL)
86};
87
88const bfd_arch_info_type bfd_avr_arch =
89  N (16, bfd_mach_avr2, "avr", TRUE, & arch_info_struct[0]);
90