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| author | Aneesh V <aneesh@ti.com> | 2012-03-08 07:20:19 (GMT) |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2012-05-15 06:31:26 (GMT) |
| commit | 5356f5451e85695cf8f9782dee54cc8dfa5445e5 (patch) | |
| tree | 17ec91695ba5ed4845801b66fa5de31f46d3d868 /arch/arm | |
| parent | 74236acacc27168102b2e3fbcac3a80e5ed82fe4 (diff) | |
| download | u-boot-5356f5451e85695cf8f9782dee54cc8dfa5445e5.tar.xz | |
ARM: enable Thumb build
Enable Thumb build and ARM-Thumb interworking based on the new
config flag CONFIG_SYS_THUMB_BUILD
Signed-off-by: Aneesh V <aneesh@ti.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/config.mk | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/arch/arm/config.mk b/arch/arm/config.mk index 3c5f987..4cc99e7 100644 --- a/arch/arm/config.mk +++ b/arch/arm/config.mk @@ -33,25 +33,33 @@ endif PLATFORM_CPPFLAGS += -DCONFIG_ARM -D__ARM__ -# Explicitly specifiy 32-bit ARM ISA since toolchain default can be -mthumb: -PF_CPPFLAGS_ARM := $(call cc-option,-marm,) +# Choose between ARM/Thumb instruction sets +ifeq ($(CONFIG_SYS_THUMB_BUILD),y) +PF_CPPFLAGS_ARM := $(call cc-option, -mthumb -mthumb-interwork,\ + $(call cc-option,-marm,)\ + $(call cc-option,-mno-thumb-interwork,)\ + ) +else +PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \ + $(call cc-option,-mno-thumb-interwork,) +endif # Try if EABI is supported, else fall back to old API, # i. e. for example: # - with ELDK 4.2 (EABI supported), use: -# -mabi=aapcs-linux -mno-thumb-interwork +# -mabi=aapcs-linux # - with ELDK 4.1 (gcc 4.x, no EABI), use: -# -mabi=apcs-gnu -mno-thumb-interwork +# -mabi=apcs-gnu # - with ELDK 3.1 (gcc 3.x), use: -# -mapcs-32 -mno-thumb-interwork +# -mapcs-32 PF_CPPFLAGS_ABI := $(call cc-option,\ - -mabi=aapcs-linux -mno-thumb-interwork,\ + -mabi=aapcs-linux,\ $(call cc-option,\ -mapcs-32,\ $(call cc-option,\ -mabi=apcs-gnu,\ )\ - ) $(call cc-option,-mno-thumb-interwork,)\ + )\ ) PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI) |