ATMEL AVR microcontroller support.

1 files changed, 89 insertions, 0 deletions

diff --git a/bfd/cpu-avr.c b/bfd/cpu-avr.c
new file mode 100644
index 00000000000..637b13fb3fd
--- /dev/null
+++ b/bfd/cpu-avr.c
@@ -0,0 +1,89 @@
+/* BFD library support routines for the AVR architecture.
+   Copyright (C) 1999, 2000 Free Software Foundation, Inc.
+   Contributed by Denis Chertykov <denisc@overta.ru>
+
+This file is part of BFD, the Binary File Descriptor library.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "libbfd.h"
+
+
+static const bfd_arch_info_type *compatible
+  PARAMS ((const bfd_arch_info_type *, const bfd_arch_info_type *));
+
+
+#define N(addr_bits, machine, print, default, next)		\
+{								\
+  8,				/* 8 bits in a word */		\
+  addr_bits,			/* bits in an address */	\
+  8,				/* 8 bits in a byte */		\
+  bfd_arch_avr,							\
+  machine,			/* machine */			\
+  "avr",			/* arch_name  */		\
+  print,			/* printable name */		\
+  1,				/* section align power */	\
+  default,			/* the default machine */	\
+  compatible,							\
+  bfd_default_scan,						\
+  next								\
+}
+
+static const bfd_arch_info_type arch_info_struct[] =
+{
+  /* AT90S1200 */
+  N (16, bfd_mach_avr1, "avr:1", false, & arch_info_struct[1]),
+
+  /* AT90S2xxx, AT90S4xxx, AT90S81xx, ATtiny22 */
+  N (16, bfd_mach_avr2, "avr:2", false, & arch_info_struct[2]),
+
+  /* ATmega103, ATmega603 */
+  N (22, bfd_mach_avr3, "avr:3", false, & arch_info_struct[3]),
+
+  /* ATmega161 */
+  N (16, bfd_mach_avr4, "avr:4", false, NULL)
+};
+
+const bfd_arch_info_type bfd_avr_arch =
+  N (16, bfd_mach_avr2, "avr", true, & arch_info_struct[0]);
+
+/* This routine is provided two arch_infos and works out which AVR
+   machine which would be compatible with both and returns a pointer
+   to its info structure.  */
+
+static const bfd_arch_info_type *
+compatible (a,b)
+     const bfd_arch_info_type * a;
+     const bfd_arch_info_type * b;
+{
+  /* If a & b are for different architectures we can do nothing.  */
+  if (a->arch != b->arch)
+    return NULL;
+
+  /* Special case for ATmega[16]03 (avr:3) and ATmega161 (avr:4).  */
+  if ((a->mach == 3 && b->mach == 4)
+      || (a->mach == 4 && b->mach == 3))
+    return NULL;
+
+  /* So far all newer AVR architecture cores are supersets of previous
+     cores.  */
+  if (a->mach <= b->mach)
+    return b;
+
+  /* Never reached!  */
+  return NULL;
+}