summaryrefslogtreecommitdiff
path: root/bfd/cpu-avr.c
diff options
context:
space:
mode:
authorAlan Modra <amodra@bigpond.net.au>2000-03-27 08:39:14 +0000
committerAlan Modra <amodra@bigpond.net.au>2000-03-27 08:39:14 +0000
commitddd853a9c9b6c802b84874d44f18ebff235a5293 (patch)
tree868dc785b320f826a775b85810b1f06865c91ce9 /bfd/cpu-avr.c
parent115607bbc418aa7e8b3e890501c2bd0176304c2f (diff)
downloadgdb-ddd853a9c9b6c802b84874d44f18ebff235a5293.tar.gz
ATMEL AVR microcontroller support.
Diffstat (limited to 'bfd/cpu-avr.c')
-rw-r--r--bfd/cpu-avr.c89
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;
+}