Merge tag 'for-5.15-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave...
[platform/kernel/linux-starfive.git] / arch / riscv / Makefile
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
4 # this architecture
5 #
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
8 # for more details.
9 #
10
11 OBJCOPYFLAGS    := -O binary
12 LDFLAGS_vmlinux :=
13 ifeq ($(CONFIG_DYNAMIC_FTRACE),y)
14         LDFLAGS_vmlinux := --no-relax
15         KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY
16         CC_FLAGS_FTRACE := -fpatchable-function-entry=8
17 endif
18
19 ifeq ($(CONFIG_CMODEL_MEDLOW),y)
20 KBUILD_CFLAGS_MODULE += -mcmodel=medany
21 endif
22
23 export BITS
24 ifeq ($(CONFIG_ARCH_RV64I),y)
25         BITS := 64
26         UTS_MACHINE := riscv64
27
28         KBUILD_CFLAGS += -mabi=lp64
29         KBUILD_AFLAGS += -mabi=lp64
30
31         KBUILD_LDFLAGS += -melf64lriscv
32 else
33         BITS := 32
34         UTS_MACHINE := riscv32
35
36         KBUILD_CFLAGS += -mabi=ilp32
37         KBUILD_AFLAGS += -mabi=ilp32
38         KBUILD_LDFLAGS += -melf32lriscv
39 endif
40
41 ifeq ($(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
47 endif
48 endif
49
50 # ISA string setting
51 riscv-march-$(CONFIG_ARCH_RV32I)        := rv32ima
52 riscv-march-$(CONFIG_ARCH_RV64I)        := rv64ima
53 riscv-march-$(CONFIG_FPU)               := $(riscv-march-y)fd
54 riscv-march-$(CONFIG_RISCV_ISA_C)       := $(riscv-march-y)c
55 KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y))
56 KBUILD_AFLAGS += -march=$(riscv-march-y)
57
58 KBUILD_CFLAGS += -mno-save-restore
59 KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET)
60
61 ifeq ($(CONFIG_CMODEL_MEDLOW),y)
62         KBUILD_CFLAGS += -mcmodel=medlow
63 endif
64 ifeq ($(CONFIG_CMODEL_MEDANY),y)
65         KBUILD_CFLAGS += -mcmodel=medany
66 endif
67 ifeq ($(CONFIG_PERF_EVENTS),y)
68         KBUILD_CFLAGS += -fno-omit-frame-pointer
69 endif
70
71 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax)
72
73 # GCC versions that support the "-mstrict-align" option default to allowing
74 # unaligned accesses.  While unaligned accesses are explicitly allowed in the
75 # RISC-V ISA, they're emulated by machine mode traps on all extant
76 # architectures.  It's faster to have GCC emit only aligned accesses.
77 KBUILD_CFLAGS += $(call cc-option,-mstrict-align)
78
79 ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
80 prepare: stack_protector_prepare
81 stack_protector_prepare: prepare0
82         $(eval KBUILD_CFLAGS += -mstack-protector-guard=tls               \
83                                 -mstack-protector-guard-reg=tp            \
84                                 -mstack-protector-guard-offset=$(shell    \
85                         awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \
86                                         include/generated/asm-offsets.h))
87 endif
88
89 # arch specific predefines for sparse
90 CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS)
91
92 # Default target when executing plain make
93 boot            := arch/riscv/boot
94 ifeq ($(CONFIG_XIP_KERNEL),y)
95 KBUILD_IMAGE := $(boot)/xipImage
96 else
97 KBUILD_IMAGE    := $(boot)/Image.gz
98 endif
99
100 head-y := arch/riscv/kernel/head.o
101
102 core-$(CONFIG_RISCV_ERRATA_ALTERNATIVE) += arch/riscv/errata/
103
104 libs-y += arch/riscv/lib/
105 libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
106
107 PHONY += vdso_install
108 vdso_install:
109         $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@
110
111 ifeq ($(CONFIG_MMU),y)
112 prepare: vdso_prepare
113 vdso_prepare: prepare0
114         $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso include/generated/vdso-offsets.h
115 endif
116
117 ifneq ($(CONFIG_XIP_KERNEL),y)
118 ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_CANAAN),yy)
119 KBUILD_IMAGE := $(boot)/loader.bin
120 else
121 KBUILD_IMAGE := $(boot)/Image.gz
122 endif
123 endif
124 BOOT_TARGETS := Image Image.gz loader loader.bin xipImage
125
126 all:    $(notdir $(KBUILD_IMAGE))
127
128 $(BOOT_TARGETS): vmlinux
129         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
130         @$(kecho) '  Kernel: $(boot)/$@ is ready'
131
132 Image.%: Image
133         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
134
135 install: install-image = Image
136 zinstall: install-image = Image.gz
137 install zinstall:
138         $(CONFIG_SHELL) $(srctree)/$(boot)/install.sh $(KERNELRELEASE) \
139         $(boot)/$(install-image) System.map "$(INSTALL_PATH)"
140
141 archclean:
142         $(Q)$(MAKE) $(clean)=$(boot)