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armv8: prevent using THUMB

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The predominantely 32-bit ARM targets try to compile the SPL in Thumb
mode to reduce code size.
The 64-bit AArch64 instruction set does not know an alternative, concise
encoding, so the Thumb build option should only be set for 32-bit
targets.
Likewise -marm machine options are only valid for ARMv7 targets.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>
This commit is contained in:
Andre Przywara 2017-01-02 11:48:26 +00:00 committed by Jagan Teki
parent 2865433a46
commit ebda0cc509
2 changed files with 3 additions and 1 deletions
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2
arch/arm/lib/Makefile
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@ -77,8 +77,10 @@ ifndef CONFIG_HAS_THUMB2
# for C files, just apend -marm, which will override previous -mthumb*
ifndef CONFIG_ARM64
CFLAGS_cache.o := -marm
CFLAGS_cache-cp15.o := -marm
endif
# For .S, drop -mthumb* and other thumb-related options.
# CFLAGS_REMOVE_* would not have an effet, so AFLAGS_REMOVE_*

2
include/configs/sunxi-common.h
View File

@ -35,7 +35,7 @@
/*
* High Level Configuration Options
*/
#ifdef CONFIG_SPL_BUILD
#if defined(CONFIG_SPL_BUILD) && !defined(CONFIG_ARM64)
#define CONFIG_SYS_THUMB_BUILD /* Thumbs mode to save space in SPL */
#endif