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 ($(CONFIG_DYNAMIC_FTRACE),y)
  14         LDFLAGS_vmlinux := --no-relax
  15 endif
  16
  17 ifeq ($(CONFIG_64BIT)$(CONFIG_CMODEL_MEDLOW),yy)
  18 KBUILD_CFLAGS_MODULE += -mcmodel=medany
  19 endif
  20
  21 export BITS
  22 ifeq ($(CONFIG_ARCH_RV64I),y)
  23         BITS := 64
  24         UTS_MACHINE := riscv64
  25
  26         KBUILD_CFLAGS += -mabi=lp64
  27         KBUILD_AFLAGS += -mabi=lp64
  28
  29         KBUILD_LDFLAGS += -melf64lriscv
  30 else
  31         BITS := 32
  32         UTS_MACHINE := riscv32
  33
  34         KBUILD_CFLAGS += -mabi=ilp32
  35         KBUILD_AFLAGS += -mabi=ilp32
  36         KBUILD_LDFLAGS += -melf32lriscv
  37 endif
  38
  39 # ISA string setting
  40 riscv-march-$(CONFIG_ARCH_RV32I)        := rv32ima
  41 riscv-march-$(CONFIG_ARCH_RV64I)        := rv64ima
  42 riscv-march-$(CONFIG_FPU)               := $(riscv-march-y)fd
  43 riscv-march-$(CONFIG_RISCV_ISA_C)       := $(riscv-march-y)c
  44 KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y))
  45 KBUILD_AFLAGS += -march=$(riscv-march-y)
  46
  47 KBUILD_CFLAGS += -mno-save-restore
  48 KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET)
  49
  50 ifeq ($(CONFIG_CMODEL_MEDLOW),y)
  51         KBUILD_CFLAGS += -mcmodel=medlow
  52 endif
  53 ifeq ($(CONFIG_CMODEL_MEDANY),y)
  54         KBUILD_CFLAGS += -mcmodel=medany
  55 endif
  56 ifeq ($(CONFIG_PERF_EVENTS),y)
  57         KBUILD_CFLAGS += -fno-omit-frame-pointer
  58 endif
  59
  60 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax)
  61
  62 # GCC versions that support the "-mstrict-align" option default to allowing
  63 # unaligned accesses.  While unaligned accesses are explicitly allowed in the
  64 # RISC-V ISA, they're emulated by machine mode traps on all extant
  65 # architectures.  It's faster to have GCC emit only aligned accesses.
  66 KBUILD_CFLAGS += $(call cc-option,-mstrict-align)
  67
  68 # arch specific predefines for sparse
  69 CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS)
  70
  71 # Default target when executing plain make
  72 boot            := arch/riscv/boot
  73 KBUILD_IMAGE    := $(boot)/Image.gz
  74
  75 head-y := arch/riscv/kernel/head.o
  76
  77 core-y += arch/riscv/
  78
  79 libs-y += arch/riscv/lib/
  80 libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
  81
  82 PHONY += vdso_install
  83 vdso_install:
  84         $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@
  85
  86 ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_KENDRYTE),yy)
  87 KBUILD_IMAGE := $(boot)/loader.bin
  88 else
  89 KBUILD_IMAGE := $(boot)/Image.gz
  90 endif
  91 BOOT_TARGETS := Image Image.gz loader loader.bin
  92
  93 all:    $(notdir $(KBUILD_IMAGE))
  94
  95 $(BOOT_TARGETS): vmlinux
  96         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
  97         @$(kecho) '  Kernel: $(boot)/$@ is ready'
  98
  99 Image.%: Image
 100         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 101
 102 zinstall install:
 103         $(Q)$(MAKE) $(build)=$(boot) $@
 104
 105 archclean:
 106         $(Q)$(MAKE) $(clean)=$(boot)