ARM: Allow to compile in thumb-2 mode

This shrinks the resulting binary size by ~25%. Exceptions
are still handled in arm mode, so we have to explicitely
put .arm directives into the exception code. Thumb-2 mode
has been tested on i.MX51 Babbage board.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/common.h b/include/common.h
index d22787542e..d2347f8629 100644
--- a/include/common.h
+++ b/include/common.h
@@ -146,6 +146,12 @@ unsigned long strtoul_suffix(const char *str, char **endp, int base);
 void start_barebox(void);
 void shutdown_barebox(void);
 
+/*
+ * architectures which have special calling conventions for
+ * executing programs should set this. Used by the 'go' command
+ */
+extern void (*do_execute)(void *func, int argc, char *argv[]);
+
 void arch_shutdown(void);
 
 int run_shell(void);