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| author | Alexandre Ghiti <alexandre.ghiti@canonical.com> | 2022-10-03 19:07:54 +0300 |
|---|---|---|
| committer | Andy Hu <andy.hu@starfivetech.com> | 2023-03-17 09:13:29 +0300 |
| commit | 7e35037d2b41163a35a83889e080de362258bf56 (patch) | |
| tree | 204dc022da46ef44ec69d9802d66936605a934a3 /arch | |
| parent | d4dedcadbc2e80be5b91556b7b1f14cd28c9d0e1 (diff) | |
| download | u-boot-7e35037d2b41163a35a83889e080de362258bf56.tar.xz | |
riscv: Fix build against binutils 2.38
The following description is copied from the equivalent patch for the
Linux Kernel proposed by Aurelien Jarno:
>From version 2.38, binutils default to ISA spec version 20191213. This
means that the csr read/write (csrr*/csrw*) instructions and fence.i
instruction has separated from the `I` extension, become two standalone
extensions: Zicsr and Zifencei. As the kernel uses those instruction,
this causes the following build failure:
arch/riscv/cpu/mtrap.S: Assembler messages:
arch/riscv/cpu/mtrap.S:65: Error: unrecognized opcode `csrr a0,scause'
arch/riscv/cpu/mtrap.S:66: Error: unrecognized opcode `csrr a1,sepc'
arch/riscv/cpu/mtrap.S:67: Error: unrecognized opcode `csrr a2,stval'
arch/riscv/cpu/mtrap.S:70: Error: unrecognized opcode `csrw sepc,a0'
Signed-off-by: Alexandre Ghiti <alexandre.ghiti@canonical.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Christian Stewart <christian@paral.in>
Reviewed-by: Rick Chen <rick@andestech.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/riscv/Makefile | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile index 0b80eb8d86..53d1194ffb 100644 --- a/arch/riscv/Makefile +++ b/arch/riscv/Makefile @@ -24,7 +24,16 @@ ifeq ($(CONFIG_CMODEL_MEDANY),y) CMODEL = medany endif -ARCH_FLAGS = -march=$(ARCH_BASE)$(ARCH_A)$(ARCH_C) -mabi=$(ABI) \ +RISCV_MARCH = $(ARCH_BASE)$(ARCH_A)$(ARCH_C) + +# Newer binutils versions default to ISA spec version 20191213 which moves some +# instructions from the I extension to the Zicsr and Zifencei extensions. +toolchain-need-zicsr-zifencei := $(call cc-option-yn, -mabi=$(ABI) -march=$(RISCV_MARCH)_zicsr_zifencei) +ifeq ($(toolchain-need-zicsr-zifencei),y) + RISCV_MARCH := $(RISCV_MARCH)_zicsr_zifencei +endif + +ARCH_FLAGS = -march=$(RISCV_MARCH) -mabi=$(ABI) \ -mcmodel=$(CMODEL) PLATFORM_CPPFLAGS += $(ARCH_FLAGS) |