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 ($(CONFIG_DYNAMIC_FTRACE),y)
14 LDFLAGS_vmlinux := --no-relax
16 KBUILD_AFLAGS_MODULE += -fPIC
17 KBUILD_CFLAGS_MODULE += -fPIC
20 ifeq ($(CONFIG_ARCH_RV64I),y)
22 UTS_MACHINE := riscv64
24 KBUILD_CFLAGS += -mabi=lp64
25 KBUILD_AFLAGS += -mabi=lp64
27 KBUILD_LDFLAGS += -melf64lriscv
30 UTS_MACHINE := riscv32
32 KBUILD_CFLAGS += -mabi=ilp32
33 KBUILD_AFLAGS += -mabi=ilp32
34 KBUILD_LDFLAGS += -melf32lriscv
37 KBUILD_CFLAGS += -Wall
40 riscv-march-$(CONFIG_ARCH_RV32I) := rv32ima
41 riscv-march-$(CONFIG_ARCH_RV64I) := rv64ima
42 riscv-march-$(CONFIG_FPU) := $(riscv-march-y)fd
43 riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c
44 KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y))
45 KBUILD_AFLAGS += -march=$(riscv-march-y)
47 KBUILD_CFLAGS += -mno-save-restore
48 KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET)
50 ifeq ($(CONFIG_CMODEL_MEDLOW),y)
51 KBUILD_CFLAGS += -mcmodel=medlow
53 ifeq ($(CONFIG_CMODEL_MEDANY),y)
54 KBUILD_CFLAGS += -mcmodel=medany
56 ifeq ($(CONFIG_MODULE_SECTIONS),y)
57 KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/riscv/kernel/module.lds
60 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax)
62 # GCC versions that support the "-mstrict-align" option default to allowing
63 # unaligned accesses. While unaligned accesses are explicitly allowed in the
64 # RISC-V ISA, they're emulated by machine mode traps on all extant
65 # architectures. It's faster to have GCC emit only aligned accesses.
66 KBUILD_CFLAGS += $(call cc-option,-mstrict-align)
68 # arch specific predefines for sparse
69 CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS)
71 # Default target when executing plain make
72 boot := arch/riscv/boot
73 KBUILD_IMAGE := $(boot)/Image.gz
75 head-y := arch/riscv/kernel/head.o
77 core-y += arch/riscv/kernel/ arch/riscv/mm/ arch/riscv/net/
79 libs-y += arch/riscv/lib/
83 $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@
88 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
91 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
94 $(Q)$(MAKE) $(build)=$(boot) $@