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8176ea4d58
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+
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#
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# Copyright (C) 2017 Andes Technology Corporation.
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# Rick Chen, Andes Technology Corporation <rick@andestech.com>
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ifeq ($(CONFIG_ARCH_RV64I),y)
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ARCH_BASE = rv64im
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ABI = lp64
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endif
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ifeq ($(CONFIG_ARCH_RV32I),y)
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ARCH_BASE = rv32im
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ABI = ilp32
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endif
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ifeq ($(CONFIG_RISCV_ISA_A),y)
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ARCH_A = a
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endif
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ifeq ($(CONFIG_RISCV_ISA_C),y)
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ARCH_C = c
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endif
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ifeq ($(CONFIG_CMODEL_MEDLOW),y)
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CMODEL = medlow
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endif
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ifeq ($(CONFIG_CMODEL_MEDANY),y)
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CMODEL = medany
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endif
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ARCH_FLAGS = -march=$(ARCH_BASE)$(ARCH_A)$(ARCH_C) -mabi=$(ABI) \
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-mcmodel=$(CMODEL)
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PLATFORM_CPPFLAGS += $(ARCH_FLAGS)
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CFLAGS_EFI += $(ARCH_FLAGS)
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head-y := arch/riscv/cpu/start.o
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libs-y += arch/riscv/cpu/
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libs-y += arch/riscv/cpu/$(CPU)/
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libs-y += arch/riscv/lib/
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