arch/loongarch/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2 #
   3 # Author: Huacai Chen <chenhuacai@loongson.cn>
   4 # Copyright (C) 2020-2022 Loongson Technology Corporation Limited
   5
   6 boot    := arch/loongarch/boot
   7
   8 KBUILD_DEFCONFIG := loongson3_defconfig
   9
  10 image-name-y                    := vmlinux
  11 image-name-$(CONFIG_EFI_ZBOOT)  := vmlinuz
  12
  13 ifndef CONFIG_EFI_STUB
  14 KBUILD_IMAGE    := $(boot)/vmlinux.elf
  15 else
  16 KBUILD_IMAGE    := $(boot)/$(image-name-y).efi
  17 endif
  18
  19 #
  20 # Select the object file format to substitute into the linker script.
  21 #
  22 64bit-tool-archpref     = loongarch64
  23 32bit-bfd               = elf32-loongarch
  24 64bit-bfd               = elf64-loongarch
  25 32bit-emul              = elf32loongarch
  26 64bit-emul              = elf64loongarch
  27
  28 ifdef CONFIG_64BIT
  29 tool-archpref           = $(64bit-tool-archpref)
  30 UTS_MACHINE             := loongarch64
  31 endif
  32
  33 ifneq ($(SUBARCH),$(ARCH))
  34   ifeq ($(CROSS_COMPILE),)
  35     CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux-  $(tool-archpref)-linux-gnu-  $(tool-archpref)-unknown-linux-gnu-)
  36   endif
  37 endif
  38
  39 ifdef CONFIG_64BIT
  40 ld-emul                 = $(64bit-emul)
  41 cflags-y                += -mabi=lp64s
  42 endif
  43
  44 cflags-y                        += -G0 -pipe -msoft-float
  45 LDFLAGS_vmlinux                 += -G0 -static -n -nostdlib
  46 KBUILD_AFLAGS_KERNEL            += -Wa,-mla-global-with-pcrel
  47 KBUILD_CFLAGS_KERNEL            += -Wa,-mla-global-with-pcrel
  48 KBUILD_AFLAGS_MODULE            += -Wa,-mla-global-with-abs
  49 KBUILD_CFLAGS_MODULE            += -fplt -Wa,-mla-global-with-abs,-mla-local-with-abs
  50
  51 cflags-y += -ffreestanding
  52 cflags-y += $(call cc-option, -mno-check-zero-division)
  53
  54 load-y          = 0x9000000000200000
  55 bootvars-y      = VMLINUX_LOAD_ADDRESS=$(load-y)
  56
  57 drivers-$(CONFIG_PCI)           += arch/loongarch/pci/
  58
  59 KBUILD_AFLAGS   += $(cflags-y)
  60 KBUILD_CFLAGS   += $(cflags-y)
  61 KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
  62
  63 # This is required to get dwarf unwinding tables into .debug_frame
  64 # instead of .eh_frame so we don't discard them.
  65 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
  66
  67 # Don't emit unaligned accesses.
  68 # Not all LoongArch cores support unaligned access, and as kernel we can't
  69 # rely on others to provide emulation for these accesses.
  70 KBUILD_CFLAGS += $(call cc-option,-mstrict-align)
  71
  72 KBUILD_CFLAGS += -isystem $(shell $(CC) -print-file-name=include)
  73
  74 KBUILD_LDFLAGS  += -m $(ld-emul)
  75
  76 ifdef CONFIG_LOONGARCH
  77 CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
  78         egrep -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \
  79         sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
  80 endif
  81
  82 libs-y += arch/loongarch/lib/
  83 libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
  84
  85 ifeq ($(KBUILD_EXTMOD),)
  86 prepare: vdso_prepare
  87 vdso_prepare: prepare0
  88         $(Q)$(MAKE) $(build)=arch/loongarch/vdso include/generated/vdso-offsets.h
  89 endif
  90
  91 PHONY += vdso_install
  92 vdso_install:
  93         $(Q)$(MAKE) $(build)=arch/loongarch/vdso $@
  94
  95 all:    $(notdir $(KBUILD_IMAGE))
  96
  97 vmlinux.elf vmlinux.efi vmlinuz.efi: vmlinux
  98         $(Q)$(MAKE) $(build)=$(boot) $(bootvars-y) $(boot)/$@
  99
 100 install:
 101         $(Q)install -D -m 755 $(KBUILD_IMAGE) $(INSTALL_PATH)/$(image-name-y)-$(KERNELRELEASE)
 102         $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
 103         $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
 104
 105 define archhelp
 106         echo '  install              - install kernel into $(INSTALL_PATH)'
 107         echo
 108 endef