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riscv: Explicitly pass -march and -mabi to the compiler

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At present the compiler flag against which architecture and abi
variant the riscv image is built for is not explicitly indicated
which means the default compiler configuration is used. But this
does not work if we want to build a different target (eg: 32-bit
riscv images using a toolchain configured for 64-bit riscv).

Fix this by explicitly passing -march and -mabi to the compiler.
Since generically we don't use floating point in U-Boot, specify
the RV[32|64]IMA ISA and software floating ABI.

This also fix some alignment coding style issues.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
This commit is contained in:
Bin Meng 2018-09-26 06:55:13 -07:00 committed by Andes
parent 3d6015651b
commit ce7a8e0740
1 changed files with 6 additions and 2 deletions
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8
arch/riscv/config.mk
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@ -18,12 +18,16 @@ endif
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
@ -31,8 +35,8 @@ CONFIG_STANDALONE_LOAD_ADDR = 0x00000000 \
-T $(srctree)/examples/standalone/riscv.lds
PLATFORM_CPPFLAGS += -ffixed-gp -fpic
PLATFORM_RELFLAGS += -fno-common -gdwarf-2 -ffunction-sections
LDFLAGS_u-boot += --gc-sections -static -pie
PLATFORM_RELFLAGS += -fno-common -gdwarf-2 -ffunction-sections
LDFLAGS_u-boot += --gc-sections -static -pie
EFI_CRT0 := crt0_riscv_efi.o
EFI_RELOC := reloc_riscv_efi.o