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 { 48 /* AT90S1200 */ 49 N (16, bfd_mach_avr1, "avr:1", false, & arch_info_struct[1]), 50 51 /* AT90S2xxx, AT90S4xxx, AT90S81xx, ATtiny22 */ 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 57 /* ATmega161 */ 58 N (16, bfd_mach_avr4, "avr:4", false, NULL) 59 }; 60 61 const bfd_arch_info_type bfd_avr_arch = 62 N (16, bfd_mach_avr2, "avr", true, & arch_info_struct[0]); 63 64 /* This routine is provided two arch_infos and works out which AVR 65 machine which would be compatible with both and returns a pointer 66 to its info structure. */ 67 68 static const bfd_arch_info_type * 69 compatible (a,b) 70 const bfd_arch_info_type * a; 71 const bfd_arch_info_type * b; 72 { 73 /* If a & b are for different architectures we can do nothing. */ 74 if (a->arch != b->arch) 75 return NULL; 76 77 /* Special case for ATmega[16]03 (avr:3) and ATmega161 (avr:4). */ 78 if ((a->mach == 3 && b->mach == 4) 79 || (a->mach == 4 && b->mach == 3)) 80 return NULL; 81 82 /* So far all newer AVR architecture cores are supersets of previous 83 cores. */ 84 if (a->mach <= b->mach) 85 return b; 86 87 /* Never reached! */ 88 return NULL; 89 } 90