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      1 #
      2 # Copyright (C) 2006 The Android Open Source Project
      3 #
      4 # Licensed under the Apache License, Version 2.0 (the "License");
      5 # you may not use this file except in compliance with the License.
      6 # You may obtain a copy of the License at
      7 #
      8 #      http://www.apache.org/licenses/LICENSE-2.0
      9 #
     10 # Unless required by applicable law or agreed to in writing, software
     11 # distributed under the License is distributed on an "AS IS" BASIS,
     12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13 # See the License for the specific language governing permissions and
     14 # limitations under the License.
     15 #
     16 
     17 # Configuration for Linux on ARM.
     18 # Included by combo/select.mk
     19 
     20 # You can set TARGET_ARCH_VARIANT to use an arch version other
     21 # than ARMv5TE. Each value should correspond to a file named
     22 # $(BUILD_COMBOS)/arch/<name>.mk which must contain
     23 # makefile variable definitions. Their
     24 # purpose is to allow module Android.mk files to selectively compile
     25 # different versions of code based upon the funtionality and
     26 # instructions available in a given architecture version.
     27 #
     28 # The blocks also define specific arch_variant_cflags, which
     29 # include defines, and compiler settings for the given architecture
     30 # version.
     31 #
     32 ifeq ($(strip $(TARGET_$(combo_2nd_arch_prefix)CPU_VARIANT)),)
     33 TARGET_$(combo_2nd_arch_prefix)CPU_VARIANT := generic
     34 endif
     35 
     36 KNOWN_ARMv8_CORES := cortex-a53 cortex-a53.a57 cortex-a55 cortex-a73 cortex-a75
     37 KNOWN_ARMv8_CORES += kryo denver64 exynos-m1 exynos-m2
     38 
     39 # Many devices (incorrectly) use armv7-a-neon as the 2nd architecture variant
     40 # for cores that implement armv8-a ISAs. The following sets it to armv8-a.
     41 ifneq (,$(filter $(TARGET_$(combo_2nd_arch_prefix)CPU_VARIANT), $(KNOWN_ARMv8_CORES)))
     42   ifneq ($(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT),armv8-a)
     43     $(warning $(TARGET_$(combo_2nd_arch_prefix)CPU_VARIANT) is armv8-a.)
     44     ifneq (,$(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT))
     45       $(warning TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT, $(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT), ignored! Use armv8-a instead.)
     46     endif
     47     # Overwrite TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT
     48     TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT := armv8-a
     49   endif
     50 endif
     51 
     52 ifeq ($(strip $(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT)),)
     53 $(error TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT must be set)
     54 endif
     55 
     56 TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_$(combo_2nd_arch_prefix)ARCH)/$(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT).mk
     57 ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),)
     58 $(error Unknown ARM architecture version: $(TARGET_$(combo_2nd_arch_prefix)ARCH_VARIANT))
     59 endif
     60 
     61 include $(TARGET_ARCH_SPECIFIC_MAKEFILE)
     62 include $(BUILD_SYSTEM)/combo/fdo.mk
     63 
     64 define $(combo_var_prefix)transform-shared-lib-to-toc
     65 $(call _gen_toc_command_for_elf,$(1),$(2))
     66 endef
     67 
     68 $(combo_2nd_arch_prefix)TARGET_PACK_MODULE_RELOCATIONS := true
     69 
     70 $(combo_2nd_arch_prefix)TARGET_LINKER := /system/bin/linker
     71