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
29 static const bfd_arch_info_type *
compatible(const bfd_arch_info_type * a,const bfd_arch_info_type * b)30 compatible (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
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. */
85 N (22, bfd_mach_avr5, "avr:5", FALSE, NULL)
86 };
87
88 const bfd_arch_info_type bfd_avr_arch =
89 N (16, bfd_mach_avr2, "avr", TRUE, & arch_info_struct[0]);
90