ARM: implement erratum 716044 workaround

[u-boot] / arch / arm / cpu / armv7 / config.mk

diff --git a/arch/arm/cpu/armv7/config.mk b/arch/arm/cpu/armv7/config.mk
index f532d62e573fc6b09f1691aadd2cf3343634b769..9c3e2f3ce421e3e24013f013dac85085d74286a1 100644 (file)
--- a/arch/arm/cpu/armv7/config.mk
+++ b/arch/arm/cpu/armv7/config.mk
@@ -22,8 +22,11 @@
 #
 PLATFORM_RELFLAGS += -fno-common -ffixed-r8 -msoft-float
 
-# Make ARMv5 to allow more compilers to work, even though its v7a.
-PLATFORM_CPPFLAGS += -march=armv5
+# If armv7-a is not supported by GCC fall-back to armv5, which is
+# supported by more tool-chains
+PF_CPPFLAGS_ARMV7 := $(call cc-option, -march=armv7-a, -march=armv5)
+PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARMV7)
+
 # =========================================================================
 #
 # Supply options according to compiler version
@@ -31,6 +34,11 @@ PLATFORM_CPPFLAGS += -march=armv5
 # =========================================================================
 PF_RELFLAGS_SLB_AT := $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
 PLATFORM_RELFLAGS += $(PF_RELFLAGS_SLB_AT)
+
+# SEE README.arm-unaligned-accesses
+PF_NO_UNALIGNED := $(call cc-option, -mno-unaligned-access,)
+PLATFORM_NO_UNALIGNED := $(PF_NO_UNALIGNED)
+
 ifneq ($(CONFIG_IMX_CONFIG),)
 ALL-y  += $(obj)u-boot.imx
 endif