arch/arm/boot/compressed/Makefile

   1 #
   2 # linux/arch/arm/boot/compressed/Makefile
   3 #
   4 # create a compressed vmlinuz image from the original vmlinux
   5 #
   6
   7 OBJS            =
   8
   9 # Ensure that MMCIF loader code appears early in the image
  10 # to minimise that number of bocks that have to be read in
  11 # order to load it.
  12 ifeq ($(CONFIG_ZBOOT_ROM_MMCIF),y)
  13 OBJS            += mmcif-sh7372.o
  14 endif
  15
  16 # Ensure that SDHI loader code appears early in the image
  17 # to minimise that number of bocks that have to be read in
  18 # order to load it.
  19 ifeq ($(CONFIG_ZBOOT_ROM_SH_MOBILE_SDHI),y)
  20 OBJS            += sdhi-shmobile.o
  21 OBJS            += sdhi-sh7372.o
  22 endif
  23
  24 AFLAGS_head.o += -DTEXT_OFFSET=$(TEXT_OFFSET)
  25 HEAD    = head.o
  26 OBJS    += misc.o decompress.o
  27 FONTC   = $(srctree)/drivers/video/console/font_acorn_8x8.c
  28
  29 # string library code (-Os is enforced to keep it much smaller)
  30 OBJS            += string.o
  31 CFLAGS_string.o := -Os
  32
  33 ifeq ($(CONFIG_ARM_VIRT_EXT),y)
  34 OBJS            += hyp-stub.o
  35 endif
  36
  37 #
  38 # Architecture dependencies
  39 #
  40 ifeq ($(CONFIG_ARCH_ACORN),y)
  41 OBJS            += ll_char_wr.o font.o
  42 endif
  43
  44 ifeq ($(CONFIG_ARCH_SHARK),y)
  45 OBJS            += head-shark.o ofw-shark.o
  46 endif
  47
  48 ifeq ($(CONFIG_ARCH_SA1100),y)
  49 OBJS            += head-sa1100.o
  50 endif
  51
  52 ifeq ($(CONFIG_CPU_XSCALE),y)
  53 OBJS            += head-xscale.o
  54 endif
  55
  56 ifeq ($(CONFIG_PXA_SHARPSL_DETECT_MACH_ID),y)
  57 OBJS            += head-sharpsl.o
  58 endif
  59
  60 ifeq ($(CONFIG_CPU_ENDIAN_BE32),y)
  61 ifeq ($(CONFIG_CPU_CP15),y)
  62 OBJS            += big-endian.o
  63 else
  64 # The endian should be set by h/w design.
  65 endif
  66 endif
  67
  68 ifeq ($(CONFIG_ARCH_SHMOBILE),y)
  69 OBJS            += head-shmobile.o
  70 endif
  71
  72 #
  73 # We now have a PIC decompressor implementation.  Decompressors running
  74 # from RAM should not define ZTEXTADDR.  Decompressors running directly
  75 # from ROM or Flash must define ZTEXTADDR (preferably via the config)
  76 # FIXME: Previous assignment to ztextaddr-y is lost here. See SHARK
  77 ifeq ($(CONFIG_ZBOOT_ROM),y)
  78 ZTEXTADDR       := $(CONFIG_ZBOOT_ROM_TEXT)
  79 ZBSSADDR        := $(CONFIG_ZBOOT_ROM_BSS)
  80 else
  81 ZTEXTADDR       := 0
  82 ZBSSADDR        := ALIGN(8)
  83 endif
  84
  85 SEDFLAGS        = s/TEXT_START/$(ZTEXTADDR)/;s/BSS_START/$(ZBSSADDR)/
  86
  87 suffix_$(CONFIG_KERNEL_GZIP) = gzip
  88 suffix_$(CONFIG_KERNEL_LZO)  = lzo
  89 suffix_$(CONFIG_KERNEL_LZMA) = lzma
  90 suffix_$(CONFIG_KERNEL_XZ)   = xzkern
  91
  92 # Borrowed libfdt files for the ATAG compatibility mode
  93
  94 libfdt          := fdt_rw.c fdt_ro.c fdt_wip.c fdt.c
  95 libfdt_hdrs     := fdt.h libfdt.h libfdt_internal.h
  96
  97 libfdt_objs     := $(addsuffix .o, $(basename $(libfdt)))
  98
  99 $(addprefix $(obj)/,$(libfdt) $(libfdt_hdrs)): $(obj)/%: $(srctree)/scripts/dtc/libfdt/%
 100         $(call cmd,shipped)
 101
 102 $(addprefix $(obj)/,$(libfdt_objs) atags_to_fdt.o): \
 103         $(addprefix $(obj)/,$(libfdt_hdrs))
 104
 105 ifeq ($(CONFIG_ARM_ATAG_DTB_COMPAT),y)
 106 OBJS    += $(libfdt_objs) atags_to_fdt.o
 107 endif
 108
 109 targets       := vmlinux vmlinux.lds \
 110                  piggy.$(suffix_y) piggy.$(suffix_y).o \
 111                  lib1funcs.o lib1funcs.S ashldi3.o ashldi3.S \
 112                  font.o font.c head.o misc.o $(OBJS)
 113
 114 # Make sure files are removed during clean
 115 extra-y       += piggy.gzip piggy.lzo piggy.lzma piggy.xzkern \
 116                  lib1funcs.S ashldi3.S $(libfdt) $(libfdt_hdrs)
 117
 118 ifeq ($(CONFIG_FUNCTION_TRACER),y)
 119 ORIG_CFLAGS := $(KBUILD_CFLAGS)
 120 KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
 121 endif
 122
 123 ccflags-y := -fpic -mno-single-pic-base -fno-builtin -I$(obj)
 124 asflags-y := -Wa,-march=all -DZIMAGE
 125
 126 # Supply kernel BSS size to the decompressor via a linker symbol.
 127 KBSS_SZ = $(shell $(CROSS_COMPILE)size $(obj)/../../../../vmlinux | \
 128                 awk 'END{print $$3}')
 129 LDFLAGS_vmlinux = --defsym _kernel_bss_size=$(KBSS_SZ)
 130 # Supply ZRELADDR to the decompressor via a linker symbol.
 131 ifneq ($(CONFIG_AUTO_ZRELADDR),y)
 132 LDFLAGS_vmlinux += --defsym zreladdr=$(ZRELADDR)
 133 endif
 134 ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
 135 LDFLAGS_vmlinux += --be8
 136 endif
 137 # ?
 138 LDFLAGS_vmlinux += -p
 139 # Report unresolved symbol references
 140 LDFLAGS_vmlinux += --no-undefined
 141 # Delete all temporary local symbols
 142 LDFLAGS_vmlinux += -X
 143 # Next argument is a linker script
 144 LDFLAGS_vmlinux += -T
 145
 146 # For __aeabi_uidivmod
 147 lib1funcs = $(obj)/lib1funcs.o
 148
 149 $(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S
 150         $(call cmd,shipped)
 151
 152 # For __aeabi_llsl
 153 ashldi3 = $(obj)/ashldi3.o
 154
 155 $(obj)/ashldi3.S: $(srctree)/arch/$(SRCARCH)/lib/ashldi3.S
 156         $(call cmd,shipped)
 157
 158 # We need to prevent any GOTOFF relocs being used with references
 159 # to symbols in the .bss section since we cannot relocate them
 160 # independently from the rest at run time.  This can be achieved by
 161 # ensuring that no private .bss symbols exist, as global symbols
 162 # always have a GOT entry which is what we need.
 163 # The .data section is already discarded by the linker script so no need
 164 # to bother about it here.
 165 check_for_bad_syms = \
 166 bad_syms=$$($(CROSS_COMPILE)nm $@ | sed -n 's/^.\{8\} [bc] \(.*\)/\1/p') && \
 167 [ -z "$$bad_syms" ] || \
 168   ( echo "following symbols must have non local/private scope:" >&2; \
 169     echo "$$bad_syms" >&2; rm -f $@; false )
 170
 171 check_for_multiple_zreladdr = \
 172 if [ $(words $(ZRELADDR)) -gt 1 -a "$(CONFIG_AUTO_ZRELADDR)" = "" ]; then \
 173         echo 'multiple zreladdrs: $(ZRELADDR)'; \
 174         echo 'This needs CONFIG_AUTO_ZRELADDR to be set'; \
 175         false; \
 176 fi
 177
 178 $(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.$(suffix_y).o \
 179                 $(addprefix $(obj)/, $(OBJS)) $(lib1funcs) $(ashldi3) FORCE
 180         @$(check_for_multiple_zreladdr)
 181         $(call if_changed,ld)
 182         @$(check_for_bad_syms)
 183
 184 $(obj)/piggy.$(suffix_y): $(obj)/../Image FORCE
 185         $(call if_changed,$(suffix_y))
 186
 187 $(obj)/piggy.$(suffix_y).o:  $(obj)/piggy.$(suffix_y) FORCE
 188
 189 CFLAGS_font.o := -Dstatic=
 190
 191 $(obj)/font.c: $(FONTC)
 192         $(call cmd,shipped)
 193
 194 $(obj)/vmlinux.lds: $(obj)/vmlinux.lds.in arch/arm/boot/Makefile $(KCONFIG_CONFIG)
 195         @sed "$(SEDFLAGS)" < $< > $@
 196
 197 $(obj)/hyp-stub.S: $(srctree)/arch/$(SRCARCH)/kernel/hyp-stub.S
 198         $(call cmd,shipped)