diff mbox

arm: kbuild: make uImage entry an odd number on ARMv7-M

Message ID 1411057343-20861-2-git-send-email-manabian@gmail.com (mailing list archive)
State New, archived
Headers show

Commit Message

Joachim Eastwood Sept. 18, 2014, 4:22 p.m. UTC 
This allows U-Boot to branch to the kernel in Thumb mode on ARMv7M
CPUs that doesn't support ARM mode.

Signed-off-by: Joachim Eastwood <manabian@gmail.com>
---
Hi,

Based on old "Make the uImage entry an odd number" e2ed3be7319f2734
patch by Catalin Marinas.

regards
Joachim Eastwood

 arch/arm/boot/Makefile | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox

Patch

diff --git a/arch/arm/boot/Makefile b/arch/arm/boot/Makefile
index ec2f8065f955..bb68035e42f2 100644
--- a/arch/arm/boot/Makefile
+++ b/arch/arm/boot/Makefile
@@ -75,6 +75,11 @@  if [ $(words $(UIMAGE_LOADADDR)) -ne 1 ]; then \
 	false; \
 fi
 
+ifeq ($(CONFIG_CPU_V7M),y)
+  # Set bit 0 to 1 so that Thumb mode is used
+  UIMAGE_ENTRYADDR=$(shell echo $(UIMAGE_LOADADDR) | sed -e "s/.$$/1/")
+endif
+
 $(obj)/uImage:	$(obj)/zImage FORCE
 	@$(check_for_multiple_loadaddr)
 	$(call if_changed,uimage)