u-boot/arch/arm/cpu/armv8/config.mk

#
# (C) Copyright 2002
# Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
#
# SPDX-License-Identifier:	GPL-2.0+
#
PLATFORM_RELFLAGS += -fno-common -ffixed-x18

PF_CPPFLAGS_ARMV8 := $(call cc-option, -march=armv8-a)
PF_NO_UNALIGNED := $(call cc-option, -mstrict-align)
PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARMV8)
PLATFORM_CPPFLAGS += $(PF_NO_UNALIGNED)
arm64: core support Relocation code based on a patch by Scott Wood, which is: Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: David Feng <fenghua@phytium.com.cn> 11 years ago			`#`
			`# (C) Copyright 2002`
			`# Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>`
			`#`
			`# SPDX-License-Identifier: GPL-2.0+`
			`#`
			`PLATFORM_RELFLAGS += -fno-common -ffixed-x18`

			`PF_CPPFLAGS_ARMV8 := $(call cc-option, -march=armv8-a)`
arm: Switch to -mno-unaligned-access when supported by the compiler When we tell the compiler to optimize for ARMv7 (and ARMv6 for that matter) it assumes a default of SCTRL.A being cleared and unaligned accesses being allowed and fast at the hardware level. We set this bit and must pass along -mno-unaligned-access so that the compiler will still breakdown accesses and not trigger a data abort. To better help understand the requirements of the project with respect to unaligned memory access, the Documentation/unaligned-memory-access.txt file has been added as doc/README.unaligned-memory-access.txt and is taken from the v3.14-rc1 tag of the kernel. Cc: Albert ARIBAUD <albert.u.boot@aribaud.net> Cc: Mans Rullgard <mans@mansr.com> Signed-off-by: Tom Rini <trini@ti.com> 11 years ago			`PF_NO_UNALIGNED := $(call cc-option, -mstrict-align)`
arm64: core support Relocation code based on a patch by Scott Wood, which is: Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: David Feng <fenghua@phytium.com.cn> 11 years ago			`PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARMV8)`
			`PLATFORM_CPPFLAGS += $(PF_NO_UNALIGNED)`