1 # This file is included by the global makefile so that you can add your own
2 # architecture-specific flags and dependencies. Remember to do have actions
3 # for "archclean" and "archdep" for cleaning up and making dependencies for
6 # This file is subject to the terms and conditions of the GNU General Public
7 # License. See the file "COPYING" in the main directory of this archive
11 OBJCOPYFLAGS := -O binary
13 ifeq ($(CONFIG_DYNAMIC_FTRACE),y)
14 LDFLAGS_vmlinux := --no-relax
16 KBUILD_AFLAGS_MODULE += -fPIC
17 KBUILD_CFLAGS_MODULE += -fPIC
19 KBUILD_DEFCONFIG = defconfig
22 ifeq ($(CONFIG_ARCH_RV64I),y)
24 UTS_MACHINE := riscv64
26 KBUILD_CFLAGS += -mabi=lp64
27 KBUILD_AFLAGS += -mabi=lp64
29 KBUILD_LDFLAGS += -melf64lriscv
32 UTS_MACHINE := riscv32
34 KBUILD_CFLAGS += -mabi=ilp32
35 KBUILD_AFLAGS += -mabi=ilp32
36 KBUILD_LDFLAGS += -melf32lriscv
39 KBUILD_CFLAGS += -Wall
42 riscv-march-$(CONFIG_ARCH_RV32I) := rv32ima
43 riscv-march-$(CONFIG_ARCH_RV64I) := rv64ima
44 riscv-march-$(CONFIG_FPU) := $(riscv-march-y)fd
45 riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c
46 KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y))
47 KBUILD_AFLAGS += -march=$(riscv-march-y)
49 KBUILD_CFLAGS += -mno-save-restore
50 KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET)
52 ifeq ($(CONFIG_CMODEL_MEDLOW),y)
53 KBUILD_CFLAGS += -mcmodel=medlow
55 ifeq ($(CONFIG_CMODEL_MEDANY),y)
56 KBUILD_CFLAGS += -mcmodel=medany
58 ifeq ($(CONFIG_MODULE_SECTIONS),y)
59 KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/riscv/kernel/module.lds
62 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax)
64 # GCC versions that support the "-mstrict-align" option default to allowing
65 # unaligned accesses. While unaligned accesses are explicitly allowed in the
66 # RISC-V ISA, they're emulated by machine mode traps on all extant
67 # architectures. It's faster to have GCC emit only aligned accesses.
68 KBUILD_CFLAGS += $(call cc-option,-mstrict-align)
70 # arch specific predefines for sparse
71 CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS)
73 # Default target when executing plain make
74 boot := arch/riscv/boot
75 KBUILD_IMAGE := $(boot)/Image.gz
77 head-y := arch/riscv/kernel/head.o
79 core-y += arch/riscv/kernel/ arch/riscv/mm/ arch/riscv/net/
81 libs-y += arch/riscv/lib/
85 $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@
90 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
93 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
96 $(Q)$(MAKE) $(build)=$(boot) $@