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| author | Etienne Carriere <etienne.carriere@linaro.org> | 2017-11-08 13:48:40 +0100 |
|---|---|---|
| committer | Etienne Carriere <etienne.carriere@linaro.org> | 2017-11-08 13:48:40 +0100 |
| commit | 26e63c4450b1e4dcef3f9256663f36253e6b62d2 (patch) | |
| tree | 04db13d5c69d3566680f8bc005078470473273be /make_helpers | |
| parent | 2904f84e3c8bdd9f3df0415b5a02ab6bcc0ab05b (diff) | |
ARMv7 target is driven by ARM_ARCH_MAJOR==7
External build environment shall sets directive ARM_ARCH_MAJOR to 7
to specify a target ARMv7-A core.
As ARM-TF expects AARCH to be set, ARM_ARCH_MAJOR==7 mandates
AARCH=aarch32.
The toolchain target architecture/cpu is delegated after the platform
configuration is parsed. Platform shall define target core through
ARM_CORTEX_A<x>=yes, <x> being 5, 7, 9, 12, 15 and/or 17.
Platform can bypass ARM_CORTEX_A<x>=yes directive and provide straight
the toolchain target directive through MARCH32_DIRECTIVE.
Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
Diffstat (limited to 'make_helpers')
| -rw-r--r-- | make_helpers/armv7-a-cpus.mk | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/make_helpers/armv7-a-cpus.mk b/make_helpers/armv7-a-cpus.mk new file mode 100644 index 00000000..5a1c75ce --- /dev/null +++ b/make_helpers/armv7-a-cpus.mk @@ -0,0 +1,33 @@ +# +# Copyright (c) 2017, ARM Limited and Contributors. All rights reserved. +# +# SPDX-License-Identifier: BSD-3-Clause +# + +ifneq (${ARCH},aarch32) +$(error ARM_ARCH_MAJOR=7 mandates ARCH=aarch32) +endif + +# For ARMv7, set march32 from platform directive ARMV7_CORTEX_Ax=yes +# and ARM_WITH_NEON=yes/no. +# +# GCC and Clang require -march=armv7-a for C-A9 and -march=armv7ve for C-A15. +# armClang requires -march=armv7-a for all ARMv7 Cortex-A. To comply with +# all, just drop -march and supply only -mcpu. + +# Platform can override march32-directive through MARCH32_DIRECTIVE +ifdef MARCH32_DIRECTIVE +march32-directive := $(MARCH32_DIRECTIVE) +else +march32-set-${ARM_CORTEX_A5} := -mcpu=cortex-a5 +march32-set-${ARM_CORTEX_A7} := -mcpu=cortex-a7 +march32-set-${ARM_CORTEX_A9} := -mcpu=cortex-a9 +march32-set-${ARM_CORTEX_A12} := -mcpu=cortex-a12 +march32-set-${ARM_CORTEX_A15} := -mcpu=cortex-a15 +march32-set-${ARM_CORTEX_A17} := -mcpu=cortex-a17 +march32-neon-$(ARM_WITH_NEON) := -mfpu=neon + +# default to -march=armv7-a as target directive +march32-set-yes ?= -march=armv7-a +march32-directive := ${march32-set-yes} ${march32-neon-yes} +endif |