mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-20 17:08:52 +09:00
![Lukas Auer](/assets/img/avatar_default.png)
RISC-V has two code models, medium low (medlow) and medium any (medany). Medlow limits addressable memory to a single 2 GiB range between the absolute addresses -2 GiB and +2 GiB. Medany limits addressable memory to any single 2 GiB address range. By default, medlow is selected for U-Boot on both 32-bit and 64-bit systems. The -mcmodel compiler flag is selected according to the Kconfig configuration. Signed-off-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de> [bmeng: adjust to make medlow the default code model for U-Boot] Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Anup Patel <anup@brainfault.org>
38 lines
777 B
Makefile
38 lines
777 B
Makefile
# SPDX-License-Identifier: GPL-2.0+
|
|
#
|
|
# Copyright (C) 2017 Andes Technology Corporation.
|
|
# Rick Chen, Andes Technology Corporation <rick@andestech.com>
|
|
|
|
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
|
|
ifeq ($(CONFIG_CMODEL_MEDLOW),y)
|
|
CMODEL = medlow
|
|
endif
|
|
ifeq ($(CONFIG_CMODEL_MEDANY),y)
|
|
CMODEL = medany
|
|
endif
|
|
|
|
ARCH_FLAGS = -march=$(ARCH_BASE)$(ARCH_A)$(ARCH_C) -mabi=$(ABI) \
|
|
-mcmodel=$(CMODEL)
|
|
|
|
PLATFORM_CPPFLAGS += $(ARCH_FLAGS)
|
|
CFLAGS_EFI += $(ARCH_FLAGS)
|
|
|
|
head-y := arch/riscv/cpu/start.o
|
|
|
|
libs-y += arch/riscv/cpu/
|
|
libs-y += arch/riscv/cpu/$(CPU)/
|
|
libs-y += arch/riscv/lib/
|