bfd/cpu-avr.c

   1 /* BFD library support routines for the AVR architecture.
   2    Copyright 1999, 2000, 2002, 2006, 2007 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
  20    MA 02110-1301, USA.  */
  21
  22 #include "sysdep.h"
  23 #include "bfd.h"
  24 #include "libbfd.h"
  25
  26 /* This routine is provided two arch_infos and works out which AVR
  27    machine which would be compatible with both and returns a pointer
  28    to its info structure.  */
  29
  30 static const bfd_arch_info_type *
  31 compatible (const bfd_arch_info_type * a,
  32             const bfd_arch_info_type * b)
  33 {
  34   /* If a & b are for different architectures we can do nothing.  */
  35   if (a->arch != b->arch)
  36     return NULL;
  37
  38   /* Special case for ATmega[16]03 (avr:3) and ATmega83 (avr:4).  */
  39   if ((a->mach == bfd_mach_avr3 && b->mach == bfd_mach_avr4)
  40       || (a->mach == bfd_mach_avr4 && b->mach == bfd_mach_avr3))
  41     return NULL;
  42
  43   /* So far all newer AVR architecture cores are supersets of previous
  44      cores.  */
  45   if (a->mach <= b->mach)
  46     return b;
  47
  48   if (a->mach >= b->mach)
  49     return a;
  50
  51   /* Never reached!  */
  52   return NULL;
  53 }
  54
  55 #define N(addr_bits, machine, print, default, next)             \
  56 {                                                               \
  57   8,                            /* 8 bits in a word.  */        \
  58   addr_bits,                    /* bits in an address.  */      \
  59   8,                            /* 8 bits in a byte.  */        \
  60   bfd_arch_avr,                                                 \
  61   machine,                      /* Machine number.  */          \
  62   "avr",                        /* Architecture name.   */      \
  63   print,                        /* Printable name.  */          \
  64   1,                            /* Section align power.  */     \
  65   default,                      /* Is this the default ?  */    \
  66   compatible,                                                   \
  67   bfd_default_scan,                                             \
  68   next                                                          \
  69 }
  70
  71 static const bfd_arch_info_type arch_info_struct[] =
  72 {
  73   /* AT90S1200, ATtiny1x, ATtiny28.  */
  74   N (16, bfd_mach_avr1, "avr:1", FALSE, & arch_info_struct[1]),
  75
  76   /* AT90S2xxx, AT90S4xxx, AT90S8xxx, ATtiny22.  */
  77   N (16, bfd_mach_avr2, "avr:2", FALSE, & arch_info_struct[2]),
  78
  79   /* ATmega103, ATmega603.  */
  80   N (22, bfd_mach_avr3, "avr:3", FALSE, & arch_info_struct[3]),
  81
  82   /* ATmega83, ATmega85.  */
  83   N (16, bfd_mach_avr4, "avr:4", FALSE, & arch_info_struct[4]),
  84
  85   /* ATmega161, ATmega163, ATmega32, AT94K.  */
  86   N (22, bfd_mach_avr5, "avr:5", FALSE, & arch_info_struct[5]),
  87
  88   /* ATmega256x.  */
  89   N (22, bfd_mach_avr6, "avr:6", FALSE, NULL)
  90 };
  91
  92 const bfd_arch_info_type bfd_avr_arch =
  93   N (16, bfd_mach_avr2, "avr", TRUE, & arch_info_struct[0]);