arch/xtensa/Makefile

   1 #
   2 # This file is subject to the terms and conditions of the GNU General Public
   3 # License.  See the file "COPYING" in the main directory of this archive
   4 # for more details.
   5 #
   6 # Copyright (C) 2001 - 2005  Tensilica Inc.
   7 # Copyright (C) 2014 Cadence Design Systems Inc.
   8 #
   9 # This file is included by the global makefile so that you can add your own
  10 # architecture-specific flags and dependencies. Remember to do have actions
  11 # for "archclean" and "archdep" for cleaning up and making dependencies for
  12 # this architecture
  13
  14 # Core configuration.
  15 # (Use VAR=<xtensa_config> to use another default compiler.)
  16
  17 variant-y := $(patsubst "%",%,$(CONFIG_XTENSA_VARIANT_NAME))
  18
  19 VARIANT = $(variant-y)
  20 export VARIANT
  21
  22 # Test for cross compiling
  23
  24 ifneq ($(VARIANT),)
  25   COMPILE_ARCH = $(shell uname -m)
  26
  27   ifneq ($(COMPILE_ARCH), xtensa)
  28     ifndef CROSS_COMPILE
  29       CROSS_COMPILE = xtensa_$(VARIANT)-
  30     endif
  31   endif
  32 endif
  33
  34 # Platform configuration
  35
  36 platform-$(CONFIG_XTENSA_PLATFORM_XT2000)       := xt2000
  37 platform-$(CONFIG_XTENSA_PLATFORM_ISS)          := iss
  38 platform-$(CONFIG_XTENSA_PLATFORM_XTFPGA)       := xtfpga
  39
  40 PLATFORM = $(platform-y)
  41 export PLATFORM
  42
  43 # temporarily until string.h is fixed
  44 KBUILD_CFLAGS += -ffreestanding -D__linux__
  45
  46 KBUILD_CFLAGS += -pipe -mlongcalls
  47
  48 KBUILD_CFLAGS += $(call cc-option,-mforce-no-pic,)
  49
  50 ifneq ($(CONFIG_LD_NO_RELAX),)
  51 LDFLAGS := --no-relax
  52 endif
  53
  54 ifeq ($(shell echo __XTENSA_EB__ | $(CC) -E - | grep -v "\#"),1)
  55 CHECKFLAGS += -D__XTENSA_EB__
  56 KBUILD_CPPFLAGS += -DCONFIG_CPU_BIG_ENDIAN
  57 endif
  58 ifeq ($(shell echo __XTENSA_EL__ | $(CC) -E - | grep -v "\#"),1)
  59 CHECKFLAGS += -D__XTENSA_EL__
  60 KBUILD_CPPFLAGS += -DCONFIG_CPU_LITTLE_ENDIAN
  61 endif
  62
  63 vardirs := $(patsubst %,arch/xtensa/variants/%/,$(variant-y))
  64 plfdirs := $(patsubst %,arch/xtensa/platforms/%/,$(platform-y))
  65
  66 ifeq ($(KBUILD_SRC),)
  67 KBUILD_CPPFLAGS += $(patsubst %,-I%include,$(vardirs) $(plfdirs))
  68 else
  69 KBUILD_CPPFLAGS += $(patsubst %,-I$(srctree)/%include,$(vardirs) $(plfdirs))
  70 endif
  71
  72 KBUILD_DEFCONFIG := iss_defconfig
  73
  74 # Only build variant and/or platform if it includes a Makefile
  75
  76 buildvar := $(shell test -e $(srctree)/arch/xtensa/variants/$(VARIANT)/Makefile && echo arch/xtensa/variants/$(VARIANT)/)
  77 buildplf := $(shell test -e $(srctree)/arch/xtensa/platforms/$(PLATFORM)/Makefile && echo arch/xtensa/platforms/$(PLATFORM)/)
  78
  79 # Find libgcc.a
  80
  81 LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
  82
  83 head-y          := arch/xtensa/kernel/head.o
  84 core-y          += arch/xtensa/kernel/ arch/xtensa/mm/
  85 core-y          += $(buildvar) $(buildplf)
  86
  87 libs-y          += arch/xtensa/lib/ $(LIBGCC)
  88 drivers-$(CONFIG_OPROFILE)      += arch/xtensa/oprofile/
  89
  90 ifneq ($(CONFIG_BUILTIN_DTB),"")
  91 core-$(CONFIG_OF) += arch/xtensa/boot/dts/
  92 endif
  93
  94 boot            := arch/xtensa/boot
  95
  96 all: zImage
  97
  98 bzImage : zImage
  99
 100 zImage: vmlinux
 101         $(Q)$(MAKE) $(build)=$(boot) $@
 102
 103 %.dtb:
 104         $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
 105
 106 dtbs: scripts
 107         $(Q)$(MAKE) $(build)=$(boot)/dts
 108
 109 define archhelp
 110   @echo '* zImage      - Compressed kernel image (arch/xtensa/boot/images/zImage.*)'
 111   @echo '  dtbs        - Build device tree blobs for enabled boards'
 112 endef