1/* BFD library support routines for the AVR architecture.
2   Copyright 1999, 2000, 2002, 2006, 2007 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 3 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,
20   MA 02110-1301, USA.  */
21
22#include "sysdep.h"
23#include "bfd.h"
24#include "libbfd.h"
25
26/* This routine is provided two arch_infos and works out which AVR
27   machine which would be compatible with both and returns a pointer
28   to its info structure.  */
29
30static const bfd_arch_info_type *
31compatible (const bfd_arch_info_type * a,
32	    const bfd_arch_info_type * b)
33{
34  /* If a & b are for different architectures we can do nothing.  */
35  if (a->arch != b->arch)
36    return NULL;
37
38  /* Special case for ATmega[16]03 (avr:3) and ATmega83 (avr:4).  */
39  if ((a->mach == bfd_mach_avr3 && b->mach == bfd_mach_avr4)
40      || (a->mach == bfd_mach_avr4 && b->mach == bfd_mach_avr3))
41    return NULL;
42
43  /* So far all newer AVR architecture cores are supersets of previous
44     cores.  */
45  if (a->mach <= b->mach)
46    return b;
47
48  if (a->mach >= b->mach)
49    return a;
50
51  /* Never reached!  */
52  return NULL;
53}
54
55#define N(addr_bits, machine, print, default, next)		\
56{								\
57  8,				/* 8 bits in a word.  */	\
58  addr_bits,			/* bits in an address.  */	\
59  8,				/* 8 bits in a byte.  */	\
60  bfd_arch_avr,							\
61  machine,			/* Machine number.  */		\
62  "avr",			/* Architecture name.   */	\
63  print,			/* Printable name.  */		\
64  1,				/* Section align power.  */	\
65  default,			/* Is this the default ?  */	\
66  compatible,							\
67  bfd_default_scan,						\
68  next								\
69}
70
71static const bfd_arch_info_type arch_info_struct[] =
72{
73  /* AT90S1200, ATtiny1x, ATtiny28.  */
74  N (16, bfd_mach_avr1, "avr:1", FALSE, & arch_info_struct[1]),
75
76  /* AT90S2xxx, AT90S4xxx, AT90S8xxx, ATtiny22.  */
77  N (16, bfd_mach_avr2, "avr:2", FALSE, & arch_info_struct[2]),
78
79  /* ATmega103, ATmega603.  */
80  N (22, bfd_mach_avr3, "avr:3", FALSE, & arch_info_struct[3]),
81
82  /* ATmega83, ATmega85.  */
83  N (16, bfd_mach_avr4, "avr:4", FALSE, & arch_info_struct[4]),
84
85  /* ATmega161, ATmega163, ATmega32, AT94K.  */
86  N (22, bfd_mach_avr5, "avr:5", FALSE, & arch_info_struct[5]),
87
88  /* ATmega256x.  */
89  N (22, bfd_mach_avr6, "avr:6", FALSE, NULL)
90};
91
92const bfd_arch_info_type bfd_avr_arch =
93  N (16, bfd_mach_avr2, "avr", TRUE, & arch_info_struct[0]);
94