From 0c074845e57e581dab9b024f4a517d4df8d73e9f Mon Sep 17 00:00:00 2001 From: Lukas Auer Date: Thu, 22 Nov 2018 11:26:15 +0100 Subject: [PATCH] riscv: set -march and -mabi based on the Kconfig configuration Use the new Kconfig entries to construct the ISA string for the -march compiler flag. The -mabi compiler flag is selected based on the base integer instruction set. With this change, the C (compressed instructions) ISA extension is now enabled for all boards with CONFIG_RISCV_ISA_C set. Buildman reports a decrease in binary size of 71590 bytes. Signed-off-by: Lukas Auer Reviewed-by: Bin Meng --- arch/riscv/Makefile | 20 ++++++++++++++++++++ arch/riscv/config.mk | 4 ---- 2 files changed, 20 insertions(+), 4 deletions(-) diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile index 8fb6a889d8..55d7c6550e 100644 --- a/arch/riscv/Makefile +++ b/arch/riscv/Makefile @@ -3,6 +3,26 @@ # Copyright (C) 2017 Andes Technology Corporation. # Rick Chen, Andes Technology Corporation +ifeq ($(CONFIG_ARCH_RV64I),y) + ARCH_BASE = rv64im + ABI = lp64 +endif +ifeq ($(CONFIG_ARCH_RV32I),y) + ARCH_BASE = rv32im + ABI = ilp32 +endif +ifeq ($(CONFIG_RISCV_ISA_A),y) + ARCH_A = a +endif +ifeq ($(CONFIG_RISCV_ISA_C),y) + ARCH_C = c +endif + +ARCH_FLAGS = -march=$(ARCH_BASE)$(ARCH_A)$(ARCH_C) -mabi=$(ABI) + +PLATFORM_CPPFLAGS += $(ARCH_FLAGS) +CFLAGS_EFI += $(ARCH_FLAGS) + head-y := arch/riscv/cpu/start.o libs-y += arch/riscv/cpu/ diff --git a/arch/riscv/config.mk b/arch/riscv/config.mk index cc5d8d1ad5..97e2d41c3d 100644 --- a/arch/riscv/config.mk +++ b/arch/riscv/config.mk @@ -14,16 +14,12 @@ 64bit-emul := elf64lriscv ifdef CONFIG_32BIT -PLATFORM_CPPFLAGS += -march=rv32ima -mabi=ilp32 PLATFORM_LDFLAGS += -m $(32bit-emul) -CFLAGS_EFI += -march=rv32ima -mabi=ilp32 EFI_LDS := elf_riscv32_efi.lds endif ifdef CONFIG_64BIT -PLATFORM_CPPFLAGS += -march=rv64ima -mabi=lp64 PLATFORM_LDFLAGS += -m $(64bit-emul) -CFLAGS_EFI += -march=rv64ima -mabi=lp64 EFI_LDS := elf_riscv64_efi.lds endif -- 2.39.5