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| author | Eugeniy Paltsev <eugeniy.paltsev@synopsys.com> | 2019-01-30 19:32:41 +0300 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2019-02-25 12:10:58 -0800 |
| commit | 76551468833cd5c356b1d9ff4bc9393fcf768a59 (patch) | |
| tree | 8e2552cc13389bc3c90c916b0342bfac7f3a90b1 /arch/arc/lib | |
| parent | 4d1e7918aae59ef504f5170a4f0c7ae82339fcb2 (diff) | |
| download | linux-stable-76551468833cd5c356b1d9ff4bc9393fcf768a59.tar.gz linux-stable-76551468833cd5c356b1d9ff4bc9393fcf768a59.tar.bz2 linux-stable-76551468833cd5c356b1d9ff4bc9393fcf768a59.zip | |
ARCv2: Add explcit unaligned access support (and ability to disable too)
As of today we enable unaligned access unconditionally on ARCv2.
Do this under a Kconfig option to allow disable it for test, benchmarking
etc. Also while at it
- Select HAVE_EFFICIENT_UNALIGNED_ACCESS
- Although gcc defaults to unaligned access (since GNU 2018.03), add the
right toggles for enabling or disabling as appropriate
- update bootlog to prints both HW feature status (exists, enabled/disabled)
and SW status (used / not used).
- wire up the relaxed memcpy for unaligned access
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
[vgupta: squashed patches, handle gcc -mno-unaligned-access quick]
Diffstat (limited to 'arch/arc/lib')
| -rw-r--r-- | arch/arc/lib/Makefile | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/arc/lib/Makefile b/arch/arc/lib/Makefile index b1656d156097..f7537b466b23 100644 --- a/arch/arc/lib/Makefile +++ b/arch/arc/lib/Makefile @@ -8,4 +8,10 @@ lib-y := strchr-700.o strcpy-700.o strlen.o memcmp.o lib-$(CONFIG_ISA_ARCOMPACT) += memcpy-700.o memset.o strcmp.o -lib-$(CONFIG_ISA_ARCV2) += memcpy-archs.o memset-archs.o strcmp-archs.o +lib-$(CONFIG_ISA_ARCV2) += memset-archs.o strcmp-archs.o + +ifdef CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS +lib-$(CONFIG_ISA_ARCV2) +=memcpy-archs-unaligned.o +else +lib-$(CONFIG_ISA_ARCV2) +=memcpy-archs.o +endif |