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_CMODEL_MEDLOW),y)
20 KBUILD_CFLAGS_MODULE += -mcmodel=medany
24 ifeq ($(CONFIG_ARCH_RV64I),y)
26 UTS_MACHINE := riscv64
28 KBUILD_CFLAGS += -mabi=lp64
29 KBUILD_AFLAGS += -mabi=lp64
31 KBUILD_LDFLAGS += -melf64lriscv
34 UTS_MACHINE := riscv32
36 KBUILD_CFLAGS += -mabi=ilp32
37 KBUILD_AFLAGS += -mabi=ilp32
38 KBUILD_LDFLAGS += -melf32lriscv
41 ifeq ($(CONFIG_LD_IS_LLD),y)
42 KBUILD_CFLAGS += -mno-relax
43 KBUILD_AFLAGS += -mno-relax
44 ifndef CONFIG_AS_IS_LLVM
45 KBUILD_CFLAGS += -Wa,-mno-relax
46 KBUILD_AFLAGS += -Wa,-mno-relax
51 riscv-march-$(CONFIG_ARCH_RV32I) := rv32ima
52 riscv-march-$(CONFIG_ARCH_RV64I) := rv64ima
53 riscv-march-$(CONFIG_FPU) := $(riscv-march-y)fd
54 riscv-march-y := $(subst imafd,g,$(riscv-march-y))
55 riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c
56 KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y))
57 KBUILD_AFLAGS += -march=$(riscv-march-y)
59 KBUILD_CFLAGS += -mno-save-restore
60 KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET)
62 ifeq ($(CONFIG_CMODEL_MEDLOW),y)
63 KBUILD_CFLAGS += -mcmodel=medlow
65 ifeq ($(CONFIG_CMODEL_MEDANY),y)
66 KBUILD_CFLAGS += -mcmodel=medany
68 ifeq ($(CONFIG_PERF_EVENTS),y)
69 KBUILD_CFLAGS += -fno-omit-frame-pointer
72 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax)
74 # GCC versions that support the "-mstrict-align" option default to allowing
75 # unaligned accesses. While unaligned accesses are explicitly allowed in the
76 # RISC-V ISA, they're emulated by machine mode traps on all extant
77 # architectures. It's faster to have GCC emit only aligned accesses.
78 KBUILD_CFLAGS += $(call cc-option,-mstrict-align)
80 ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
81 prepare: stack_protector_prepare
82 stack_protector_prepare: prepare0
83 $(eval KBUILD_CFLAGS += -mstack-protector-guard=tls \
84 -mstack-protector-guard-reg=tp \
85 -mstack-protector-guard-offset=$(shell \
86 awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \
87 include/generated/asm-offsets.h))
90 # arch specific predefines for sparse
91 CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS)
93 # Default target when executing plain make
94 boot := arch/riscv/boot
95 ifeq ($(CONFIG_XIP_KERNEL),y)
96 KBUILD_IMAGE := $(boot)/xipImage
98 KBUILD_IMAGE := $(boot)/Image.gz
101 head-y := arch/riscv/kernel/head.o
103 core-$(CONFIG_RISCV_ERRATA_ALTERNATIVE) += arch/riscv/errata/
105 libs-y += arch/riscv/lib/
106 libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
108 PHONY += vdso_install
110 $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@
112 ifeq ($(CONFIG_MMU),y)
113 prepare: vdso_prepare
114 vdso_prepare: prepare0
115 $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso include/generated/vdso-offsets.h
118 ifneq ($(CONFIG_XIP_KERNEL),y)
119 ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_CANAAN),yy)
120 KBUILD_IMAGE := $(boot)/loader.bin
122 KBUILD_IMAGE := $(boot)/Image.gz
125 BOOT_TARGETS := Image Image.gz loader loader.bin xipImage
127 all: $(notdir $(KBUILD_IMAGE))
129 $(BOOT_TARGETS): vmlinux
130 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
131 @$(kecho) ' Kernel: $(boot)/$@ is ready'
134 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
136 install: install-image = Image
137 zinstall: install-image = Image.gz
139 $(CONFIG_SHELL) $(srctree)/$(boot)/install.sh $(KERNELRELEASE) \
140 $(boot)/$(install-image) System.map "$(INSTALL_PATH)"
143 $(Q)$(MAKE) $(clean)=$(boot)