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 ($(CONFIG_DYNAMIC_FTRACE),y)
14 LDFLAGS_vmlinux := --no-relax
15 KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY
16 CC_FLAGS_FTRACE := -fpatchable-function-entry=8
19 ifeq ($(CONFIG_64BIT)$(CONFIG_CMODEL_MEDLOW),yy)
20 KBUILD_CFLAGS_MODULE += -mcmodel=medany
24 ifeq ($(CONFIG_ARCH_RV64I),y)
26 UTS_MACHINE := riscv64
28 KBUILD_CFLAGS += -mabi=lp64
29 KBUILD_AFLAGS += -mabi=lp64
31 KBUILD_LDFLAGS += -melf64lriscv
34 UTS_MACHINE := riscv32
36 KBUILD_CFLAGS += -mabi=ilp32
37 KBUILD_AFLAGS += -mabi=ilp32
38 KBUILD_LDFLAGS += -melf32lriscv
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_PERF_EVENTS),y)
59 KBUILD_CFLAGS += -fno-omit-frame-pointer
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 += $(call cc-option,-mstrict-align)
70 ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
71 prepare: stack_protector_prepare
72 stack_protector_prepare: prepare0
73 $(eval KBUILD_CFLAGS += -mstack-protector-guard=tls \
74 -mstack-protector-guard-reg=tp \
75 -mstack-protector-guard-offset=$(shell \
76 awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \
77 include/generated/asm-offsets.h))
80 # arch specific predefines for sparse
81 CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS)
83 # Default target when executing plain make
84 boot := arch/riscv/boot
85 ifeq ($(CONFIG_XIP_KERNEL),y)
86 KBUILD_IMAGE := $(boot)/xipImage
88 KBUILD_IMAGE := $(boot)/Image.gz
91 head-y := arch/riscv/kernel/head.o
94 core-$(CONFIG_RISCV_ERRATA_ALTERNATIVE) += arch/riscv/errata/
96 libs-y += arch/riscv/lib/
97 libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
101 $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@
103 ifneq ($(CONFIG_XIP_KERNEL),y)
104 ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_CANAAN),yy)
105 KBUILD_IMAGE := $(boot)/loader.bin
107 KBUILD_IMAGE := $(boot)/Image.gz
110 BOOT_TARGETS := Image Image.gz loader loader.bin xipImage
112 all: $(notdir $(KBUILD_IMAGE))
114 $(BOOT_TARGETS): vmlinux
115 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
116 @$(kecho) ' Kernel: $(boot)/$@ is ready'
119 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
122 $(Q)$(MAKE) $(build)=$(boot) $@
125 $(Q)$(MAKE) $(clean)=$(boot)