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adde6300 AM |
1 | /* BFD library support routines for the AVR architecture. |
2 | Copyright (C) 1999, 2000 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | #include "bfd.h" | |
22 | #include "sysdep.h" | |
23 | #include "libbfd.h" | |
24 | ||
25 | ||
26 | static const bfd_arch_info_type *compatible | |
27 | PARAMS ((const bfd_arch_info_type *, const bfd_arch_info_type *)); | |
28 | ||
29 | ||
30 | #define N(addr_bits, machine, print, default, next) \ | |
31 | { \ | |
32 | 8, /* 8 bits in a word */ \ | |
33 | addr_bits, /* bits in an address */ \ | |
34 | 8, /* 8 bits in a byte */ \ | |
35 | bfd_arch_avr, \ | |
36 | machine, /* machine */ \ | |
37 | "avr", /* arch_name */ \ | |
38 | print, /* printable name */ \ | |
39 | 1, /* section align power */ \ | |
40 | default, /* the default machine */ \ | |
41 | compatible, \ | |
42 | bfd_default_scan, \ | |
43 | next \ | |
44 | } | |
45 | ||
46 | static const bfd_arch_info_type arch_info_struct[] = | |
47 | { | |
65aa24b6 | 48 | /* AT90S1200, ATtiny1x, ATtiny28 */ |
adde6300 AM |
49 | N (16, bfd_mach_avr1, "avr:1", false, & arch_info_struct[1]), |
50 | ||
65aa24b6 | 51 | /* AT90S2xxx, AT90S4xxx, AT90S8xxx, ATtiny22 */ |
adde6300 AM |
52 | N (16, bfd_mach_avr2, "avr:2", false, & arch_info_struct[2]), |
53 | ||
54 | /* ATmega103, ATmega603 */ | |
55 | N (22, bfd_mach_avr3, "avr:3", false, & arch_info_struct[3]), | |
56 | ||
65aa24b6 NC |
57 | /* ATmega83, ATmega85 */ |
58 | N (16, bfd_mach_avr4, "avr:4", false, & arch_info_struct[4]), | |
59 | ||
60 | /* ATmega161, ATmega163, ATmega32, AT94K */ | |
61 | N (22, bfd_mach_avr5, "avr:5", false, NULL) | |
adde6300 AM |
62 | }; |
63 | ||
64 | const bfd_arch_info_type bfd_avr_arch = | |
65 | N (16, bfd_mach_avr2, "avr", true, & arch_info_struct[0]); | |
66 | ||
67 | /* This routine is provided two arch_infos and works out which AVR | |
68 | machine which would be compatible with both and returns a pointer | |
69 | to its info structure. */ | |
70 | ||
71 | static const bfd_arch_info_type * | |
72 | compatible (a,b) | |
73 | const bfd_arch_info_type * a; | |
74 | const bfd_arch_info_type * b; | |
75 | { | |
76 | /* If a & b are for different architectures we can do nothing. */ | |
77 | if (a->arch != b->arch) | |
78 | return NULL; | |
79 | ||
65aa24b6 | 80 | /* Special case for ATmega[16]03 (avr:3) and ATmega83 (avr:4). */ |
adde6300 AM |
81 | if ((a->mach == 3 && b->mach == 4) |
82 | || (a->mach == 4 && b->mach == 3)) | |
83 | return NULL; | |
84 | ||
85 | /* So far all newer AVR architecture cores are supersets of previous | |
86 | cores. */ | |
87 | if (a->mach <= b->mach) | |
88 | return b; | |
89 | ||
65aa24b6 NC |
90 | if (a->mach >= b->mach) |
91 | return a; | |
92 | ||
adde6300 AM |
93 | /* Never reached! */ |
94 | return NULL; | |
95 | } |