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