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https://github.com/brain-hackers/u-boot-brain
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1551df35f2
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>
13 lines
360 B
Makefile
13 lines
360 B
Makefile
#
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# (C) Copyright 2002
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# Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
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#
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# SPDX-License-Identifier: GPL-2.0+
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#
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PLATFORM_RELFLAGS += -fno-common -ffixed-x18
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PF_CPPFLAGS_ARMV8 := $(call cc-option, -march=armv8-a)
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PF_NO_UNALIGNED := $(call cc-option, -mstrict-align)
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PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARMV8)
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PLATFORM_CPPFLAGS += $(PF_NO_UNALIGNED)
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