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

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

# 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)

# On supported platforms we set the bit which causes us to trap on unaligned
# memory access.  This is the opposite of what the compiler expects to be
# the default so we must pass in -mno-unaligned-access so that it is aware
# of our decision.
PF_NO_UNALIGNED := $(call cc-option, -mno-unaligned-access,)
PLATFORM_CPPFLAGS += $(PF_NO_UNALIGNED)
OMAP3: Add common cpu and start code Add common cpu and start code. Signed-off-by: Dirk Behme <dirk.behme@googlemail.com> 2008-12-14 08:47:13 +00:00			`#`
			`# (C) Copyright 2002`
Fix e-mail address of Gary Jennejohn. Signed-off-by: Detlev Zundel <dzu@denx.de> 2009-05-13 08:54:10 +00:00			`# Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>`
OMAP3: Add common cpu and start code Add common cpu and start code. Signed-off-by: Dirk Behme <dirk.behme@googlemail.com> 2008-12-14 08:47:13 +00:00			`#`
Add GPL-2.0+ SPDX-License-Identifier to source files Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com> 2013-07-08 07:37:19 +00:00			`# SPDX-License-Identifier: GPL-2.0+`
OMAP3: Add common cpu and start code Add common cpu and start code. Signed-off-by: Dirk Behme <dirk.behme@googlemail.com> 2008-12-14 08:47:13 +00:00			`#`

armv7: Use -march=armv7-a and thereby enable Thumb-2 Enable -march=armv7-a for armv7 platforms if the tool-chain supports it. This in turn results in Thumb-2 code generated for these platforms if CONFIG_SYS_THUMB_BUILD is enabled. Signed-off-by: Aneesh V <aneesh@ti.com> 2012-03-08 07:20:20 +00:00			`# 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)`

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> 2014-02-25 15:27:01 +00:00			`# On supported platforms we set the bit which causes us to trap on unaligned`
			`# memory access. This is the opposite of what the compiler expects to be`
			`# the default so we must pass in -mno-unaligned-access so that it is aware`
			`# of our decision.`
ARM: prevent misaligned array inits Under option -munaligned-access, gcc can perform local char or 16-bit array initializations using misaligned native accesses which will throw a data abort exception. Fix files where these array initializations were unneeded, and for files known to contain such initializations, enforce gcc option -mno-unaligned-access. Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net> [trini: Switch to usign call cc-option for -mno-unaligned-access as Albert had done previously as that's really correct] Signed-off-by: Tom Rini <trini@ti.com> 2012-10-09 09:28:15 +00:00			`PF_NO_UNALIGNED := $(call cc-option, -mno-unaligned-access,)`
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> 2014-02-25 15:27:01 +00:00			`PLATFORM_CPPFLAGS += $(PF_NO_UNALIGNED)`