Allow setting compiler's target architecture
Change-Id: I56ea088f415bdb9077c385bd3450ff4b2cfa2eac Signed-off-by: Alexei Fedorov <Alexei.Fedorov@arm.com>
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24
Makefile
24
Makefile
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@ -147,26 +147,34 @@ target32-directive = -target arm-none-eabi
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# Will set march32-directive from platform configuration
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else
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target32-directive = -target armv8a-none-eabi
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# Set the compiler's target architecture profile based on ARM_ARCH_MINOR option
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ifeq (${ARM_ARCH_MINOR},0)
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march32-directive = -march=armv8-a
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march64-directive = -march=armv8-a
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else
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march32-directive = -march=armv8.${ARM_ARCH_MINOR}-a
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march64-directive = -march=armv8.${ARM_ARCH_MINOR}-a
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endif
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endif
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ifneq ($(findstring armclang,$(notdir $(CC))),)
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TF_CFLAGS_aarch32 = -target arm-arm-none-eabi $(march32-directive)
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TF_CFLAGS_aarch64 = -target aarch64-arm-none-eabi -march=armv8-a
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TF_CFLAGS_aarch64 = -target aarch64-arm-none-eabi $(march64-directive)
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LD = $(LINKER)
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AS = $(CC) -c -x assembler-with-cpp $(TF_CFLAGS_$(ARCH))
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CPP = $(CC) -E $(TF_CFLAGS_$(ARCH))
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PP = $(CC) -E $(TF_CFLAGS_$(ARCH))
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else ifneq ($(findstring clang,$(notdir $(CC))),)
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TF_CFLAGS_aarch32 = $(target32-directive) $(march32-directive)
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TF_CFLAGS_aarch64 = -target aarch64-elf
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TF_CFLAGS_aarch64 = -target aarch64-elf $(march64-directive)
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LD = $(LINKER)
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AS = $(CC) -c -x assembler-with-cpp $(TF_CFLAGS_$(ARCH))
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CPP = $(CC) -E
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PP = $(CC) -E
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else
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TF_CFLAGS_aarch32 = $(march32-directive)
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TF_CFLAGS_aarch64 = -march=armv8-a
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TF_CFLAGS_aarch64 = $(march64-directive)
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LD = $(LINKER)
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endif
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@ -182,15 +190,7 @@ TF_CFLAGS_aarch32 += -mno-unaligned-access
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TF_CFLAGS_aarch64 += -mgeneral-regs-only -mstrict-align
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ASFLAGS_aarch32 = $(march32-directive)
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ASFLAGS_aarch64 = -march=armv8-a
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# Set the compiler to ARMv8.3 mode so that it uses all the ARMv8.3-PAuth
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# instructions. Keeping it in 8.0 would make the compiler emit
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# backwards-compatible hint instructions, which needs more space.
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ifeq (${ENABLE_PAUTH},1)
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TF_CFLAGS_aarch64 += -march=armv8.3-a
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ASFLAGS_aarch64 += -march=armv8.3-a
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endif
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ASFLAGS_aarch64 = $(march64-directive)
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WARNING1 := -Wextra
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WARNING1 += -Wunused -Wno-unused-parameter
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@ -2521,7 +2521,7 @@ section lists the usage of Architecture Extensions, and build flags
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controlling them.
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In general, and unless individually mentioned, the build options
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``ARM_ARCH_MAJOR`` and ``ARM_ARCH_MINOR`` selects the Architecture Extension to
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``ARM_ARCH_MAJOR`` and ``ARM_ARCH_MINOR`` select the Architecture Extension to
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target when building TF-A. Subsequent Arm Architecture Extensions are backward
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compatible with previous versions.
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@ -2570,6 +2570,10 @@ Armv8.3-A
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``CTX_INCLUDE_PAUTH_REGS`` to 1. This enables pointer authentication in BL1,
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BL2, BL31, and the TSP if it is used.
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If ``ARM_ARCH_MAJOR == 8`` and ``ARM_ARCH_MINOR >= 3`` the code footprint of
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enabling PAuth is lower because the compiler will use the optimized
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PAuth instructions rather than the backwards-compatible ones.
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Armv7-A
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~~~~~~~
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