| 1 | /* BFD library support routines for the AVR architecture.
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| 2 | Copyright 1999, 2000 Free Software Foundation, Inc.
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| 3 | Contributed by Denis Chertykov <denisc@overta.ru>
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| 4 |
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| 5 | This file is part of BFD, the Binary File Descriptor library.
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| 6 |
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| 7 | This program is free software; you can redistribute it and/or modify
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| 8 | it under the terms of the GNU General Public License as published by
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| 9 | the Free Software Foundation; either version 2 of the License, or
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| 10 | (at your option) any later version.
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| 11 |
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| 12 | This program is distributed in the hope that it will be useful,
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| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | GNU General Public License for more details.
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| 16 |
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| 17 | You should have received a copy of the GNU General Public License
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| 18 | along with this program; if not, write to the Free Software
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| 19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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| 20 |
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| 21 | #include "bfd.h"
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| 22 | #include "sysdep.h"
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| 23 | #include "libbfd.h"
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| 24 |
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| 25 | static const bfd_arch_info_type *compatible
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| 26 | PARAMS ((const bfd_arch_info_type *, const bfd_arch_info_type *));
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| 27 |
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| 28 | #define N(addr_bits, machine, print, default, next) \
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| 29 | { \
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| 30 | 8, /* 8 bits in a word */ \
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| 31 | addr_bits, /* bits in an address */ \
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| 32 | 8, /* 8 bits in a byte */ \
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| 33 | bfd_arch_avr, \
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| 34 | machine, /* machine */ \
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| 35 | "avr", /* arch_name */ \
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| 36 | print, /* printable name */ \
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| 37 | 1, /* section align power */ \
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| 38 | default, /* the default machine */ \
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| 39 | compatible, \
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| 40 | bfd_default_scan, \
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| 41 | next \
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| 42 | }
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| 43 |
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| 44 | static const bfd_arch_info_type arch_info_struct[] =
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| 45 | {
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| 46 | /* AT90S1200, ATtiny1x, ATtiny28 */
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| 47 | N (16, bfd_mach_avr1, "avr:1", false, & arch_info_struct[1]),
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| 48 |
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| 49 | /* AT90S2xxx, AT90S4xxx, AT90S8xxx, ATtiny22 */
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| 50 | N (16, bfd_mach_avr2, "avr:2", false, & arch_info_struct[2]),
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| 51 |
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| 52 | /* ATmega103, ATmega603 */
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| 53 | N (22, bfd_mach_avr3, "avr:3", false, & arch_info_struct[3]),
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| 54 |
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| 55 | /* ATmega83, ATmega85 */
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| 56 | N (16, bfd_mach_avr4, "avr:4", false, & arch_info_struct[4]),
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| 57 |
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| 58 | /* ATmega161, ATmega163, ATmega32, AT94K */
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| 59 | N (22, bfd_mach_avr5, "avr:5", false, NULL)
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| 60 | };
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| 61 |
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| 62 | const bfd_arch_info_type bfd_avr_arch =
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| 63 | N (16, bfd_mach_avr2, "avr", true, & arch_info_struct[0]);
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| 64 |
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| 65 | /* This routine is provided two arch_infos and works out which AVR
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| 66 | machine which would be compatible with both and returns a pointer
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| 67 | to its info structure. */
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| 68 |
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| 69 | static const bfd_arch_info_type *
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| 70 | compatible (a,b)
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| 71 | const bfd_arch_info_type * a;
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| 72 | const bfd_arch_info_type * b;
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| 73 | {
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| 74 | /* If a & b are for different architectures we can do nothing. */
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| 75 | if (a->arch != b->arch)
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| 76 | return NULL;
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| 77 |
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| 78 | /* Special case for ATmega[16]03 (avr:3) and ATmega83 (avr:4). */
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| 79 | if ((a->mach == 3 && b->mach == 4)
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| 80 | || (a->mach == 4 && b->mach == 3))
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| 81 | return NULL;
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| 82 |
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| 83 | /* So far all newer AVR architecture cores are supersets of previous
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| 84 | cores. */
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| 85 | if (a->mach <= b->mach)
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| 86 | return b;
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| 87 |
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| 88 | if (a->mach >= b->mach)
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| 89 | return a;
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| 90 |
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| 91 | /* Never reached! */
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| 92 | return NULL;
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| 93 | }
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