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
12 OBJCOPYFLAGS := -O binary
14 ifeq ($(CONFIG_DYNAMIC_FTRACE),y)
15 LDFLAGS_vmlinux := --no-relax
17 KBUILD_AFLAGS_MODULE += -fPIC
18 KBUILD_CFLAGS_MODULE += -fPIC
20 KBUILD_DEFCONFIG = defconfig
23 ifeq ($(CONFIG_ARCH_RV64I),y)
25 UTS_MACHINE := riscv64
27 KBUILD_CFLAGS += -mabi=lp64
28 KBUILD_AFLAGS += -mabi=lp64
30 LDFLAGS += -melf64lriscv
33 UTS_MACHINE := riscv32
35 KBUILD_CFLAGS += -mabi=ilp32
36 KBUILD_AFLAGS += -mabi=ilp32
38 LDFLAGS += -melf32lriscv
41 KBUILD_CFLAGS += -Wall
43 ifeq ($(CONFIG_RISCV_ISA_A),y)
46 ifeq ($(CONFIG_RISCV_ISA_C),y)
50 KBUILD_AFLAGS += -march=$(KBUILD_MARCH)$(KBUILD_ARCH_A)fd$(KBUILD_ARCH_C)
52 KBUILD_CFLAGS += -march=$(KBUILD_MARCH)$(KBUILD_ARCH_A)$(KBUILD_ARCH_C)
53 KBUILD_CFLAGS += -mno-save-restore
54 KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET)
56 ifeq ($(CONFIG_CMODEL_MEDLOW),y)
57 KBUILD_CFLAGS += -mcmodel=medlow
59 ifeq ($(CONFIG_CMODEL_MEDANY),y)
60 KBUILD_CFLAGS += -mcmodel=medany
62 ifeq ($(CONFIG_MODULE_SECTIONS),y)
63 KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/riscv/kernel/module.lds
66 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax)
68 # GCC versions that support the "-mstrict-align" option default to allowing
69 # unaligned accesses. While unaligned accesses are explicitly allowed in the
70 # RISC-V ISA, they're emulated by machine mode traps on all extant
71 # architectures. It's faster to have GCC emit only aligned accesses.
72 KBUILD_CFLAGS += $(call cc-option,-mstrict-align)
74 # arch specific predefines for sparse
75 CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS)
77 head-y := arch/riscv/kernel/head.o
79 core-y += arch/riscv/kernel/ arch/riscv/mm/
81 libs-y += arch/riscv/lib/