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_CFLAGS += $(call cc-ifversion, -ge, 0500, -DCONFIG_ARCH_SUPPORTS_INT128)
32 LDFLAGS += -melf64lriscv
35 UTS_MACHINE := riscv32
37 KBUILD_CFLAGS += -mabi=ilp32
38 KBUILD_AFLAGS += -mabi=ilp32
40 LDFLAGS += -melf32lriscv
43 KBUILD_CFLAGS += -Wall
45 ifeq ($(CONFIG_RISCV_ISA_A),y)
48 ifeq ($(CONFIG_RISCV_ISA_C),y)
52 KBUILD_AFLAGS += -march=$(KBUILD_MARCH)$(KBUILD_ARCH_A)fd$(KBUILD_ARCH_C)
54 KBUILD_CFLAGS += -march=$(KBUILD_MARCH)$(KBUILD_ARCH_A)$(KBUILD_ARCH_C)
55 KBUILD_CFLAGS += -mno-save-restore
56 KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET)
58 ifeq ($(CONFIG_CMODEL_MEDLOW),y)
59 KBUILD_CFLAGS += -mcmodel=medlow
61 ifeq ($(CONFIG_CMODEL_MEDANY),y)
62 KBUILD_CFLAGS += -mcmodel=medany
64 ifeq ($(CONFIG_MODULE_SECTIONS),y)
65 KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/riscv/kernel/module.lds
68 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax)
70 # GCC versions that support the "-mstrict-align" option default to allowing
71 # unaligned accesses. While unaligned accesses are explicitly allowed in the
72 # RISC-V ISA, they're emulated by machine mode traps on all extant
73 # architectures. It's faster to have GCC emit only aligned accesses.
74 KBUILD_CFLAGS += $(call cc-option,-mstrict-align)
76 # arch specific predefines for sparse
77 CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS)
79 head-y := arch/riscv/kernel/head.o
81 core-y += arch/riscv/kernel/ arch/riscv/mm/
83 libs-y += arch/riscv/lib/