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 5This file is part of BFD, the Binary File Descriptor library. 6 7This program is free software; you can redistribute it and/or modify 8it under the terms of the GNU General Public License as published by 9the Free Software Foundation; either version 2 of the License, or 10(at your option) any later version. 11 12This program is distributed in the hope that it will be useful, 13but WITHOUT ANY WARRANTY; without even the implied warranty of 14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15GNU General Public License for more details. 16 17You should have received a copy of the GNU General Public License 18along with this program; if not, write to the Free Software 19Foundation, 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 25static 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 44static 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 62const 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 69static const bfd_arch_info_type * 70compatible (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} 94