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   = $(srctree)/drivers/video/console/font_acorn_8x8.c
  28
  29 # string library code (-Os is enforced to keep it much smaller)
  30 OBJS            += string.o
  31 CFLAGS_string.o := -Os
  32
  33 #
  34 # Architecture dependencies
  35 #
  36 ifeq ($(CONFIG_ARCH_ACORN),y)
  37 OBJS            += ll_char_wr.o font.o
  38 endif
  39
  40 ifeq ($(CONFIG_ARCH_SHARK),y)
  41 OBJS            += head-shark.o ofw-shark.o
  42 endif
  43
  44 ifeq ($(CONFIG_ARCH_P720T),y)
  45 # Borrow this code from SA1100
  46 OBJS            += head-sa1100.o
  47 endif
  48
  49 ifeq ($(CONFIG_ARCH_SA1100),y)
  50 OBJS            += head-sa1100.o
  51 endif
  52
  53 ifeq ($(CONFIG_ARCH_VT8500),y)
  54 OBJS            += head-vt8500.o
  55 endif
  56
  57 ifeq ($(CONFIG_CPU_XSCALE),y)
  58 OBJS            += head-xscale.o
  59 endif
  60
  61 ifeq ($(CONFIG_PXA_SHARPSL_DETECT_MACH_ID),y)
  62 OBJS            += head-sharpsl.o
  63 endif
  64
  65 ifeq ($(CONFIG_CPU_ENDIAN_BE32),y)
  66 ifeq ($(CONFIG_CPU_CP15),y)
  67 OBJS            += big-endian.o
  68 else
  69 # The endian should be set by h/w design.
  70 endif
  71 endif
  72
  73 ifeq ($(CONFIG_ARCH_SHMOBILE),y)
  74 OBJS            += head-shmobile.o
  75 endif
  76
  77 #
  78 # We now have a PIC decompressor implementation.  Decompressors running
  79 # from RAM should not define ZTEXTADDR.  Decompressors running directly
  80 # from ROM or Flash must define ZTEXTADDR (preferably via the config)
  81 # FIXME: Previous assignment to ztextaddr-y is lost here. See SHARK
  82 ifeq ($(CONFIG_ZBOOT_ROM),y)
  83 ZTEXTADDR       := $(CONFIG_ZBOOT_ROM_TEXT)
  84 ZBSSADDR        := $(CONFIG_ZBOOT_ROM_BSS)
  85 else
  86 ZTEXTADDR       := 0
  87 ZBSSADDR        := ALIGN(8)
  88 endif
  89
  90 SEDFLAGS        = s/TEXT_START/$(ZTEXTADDR)/;s/BSS_START/$(ZBSSADDR)/
  91
  92 suffix_$(CONFIG_KERNEL_GZIP) = gzip
  93 suffix_$(CONFIG_KERNEL_LZO)  = lzo
  94 suffix_$(CONFIG_KERNEL_LZMA) = lzma
  95
  96 # Borrowed libfdt files for the ATAG compatibility mode
  97
  98 libfdt          := fdt_rw.c fdt_ro.c fdt_wip.c fdt.c
  99 libfdt_hdrs     := fdt.h libfdt.h libfdt_internal.h
 100
 101 libfdt_objs     := $(addsuffix .o, $(basename $(libfdt)))
 102
 103 $(addprefix $(obj)/,$(libfdt) $(libfdt_hdrs)): $(obj)/%: $(srctree)/scripts/dtc/libfdt/%
 104         $(call cmd,shipped)
 105
 106 $(addprefix $(obj)/,$(libfdt_objs) atags_to_fdt.o): \
 107         $(addprefix $(obj)/,$(libfdt_hdrs))
 108
 109 ifeq ($(CONFIG_ARM_ATAG_DTB_COMPAT),y)
 110 OBJS    += $(libfdt_objs) atags_to_fdt.o
 111 endif
 112
 113 targets       := vmlinux vmlinux.lds \
 114                  piggy.$(suffix_y) piggy.$(suffix_y).o \
 115                  lib1funcs.o lib1funcs.S font.o font.c head.o misc.o $(OBJS)
 116
 117 # Make sure files are removed during clean
 118 extra-y       += piggy.gzip piggy.lzo piggy.lzma lib1funcs.S $(libfdt) $(libfdt_hdrs)
 119
 120 ifeq ($(CONFIG_FUNCTION_TRACER),y)
 121 ORIG_CFLAGS := $(KBUILD_CFLAGS)
 122 KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
 123 endif
 124
 125 ccflags-y := -fpic -fno-builtin -I$(obj)
 126 asflags-y := -Wa,-march=all
 127
 128 # Supply kernel BSS size to the decompressor via a linker symbol.
 129 KBSS_SZ = $(shell $(CROSS_COMPILE)size $(obj)/../../../../vmlinux | \
 130                 awk 'END{print $$3}')
 131 LDFLAGS_vmlinux = --defsym _kernel_bss_size=$(KBSS_SZ)
 132 # Supply ZRELADDR to the decompressor via a linker symbol.
 133 ifneq ($(CONFIG_AUTO_ZRELADDR),y)
 134 LDFLAGS_vmlinux += --defsym zreladdr=$(ZRELADDR)
 135 endif
 136 ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
 137 LDFLAGS_vmlinux += --be8
 138 endif
 139 # ?
 140 LDFLAGS_vmlinux += -p
 141 # Report unresolved symbol references
 142 LDFLAGS_vmlinux += --no-undefined
 143 # Delete all temporary local symbols
 144 LDFLAGS_vmlinux += -X
 145 # Next argument is a linker script
 146 LDFLAGS_vmlinux += -T
 147
 148 # For __aeabi_uidivmod
 149 lib1funcs = $(obj)/lib1funcs.o
 150
 151 $(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S
 152         $(call cmd,shipped)
 153
 154 # We need to prevent any GOTOFF relocs being used with references
 155 # to symbols in the .bss section since we cannot relocate them
 156 # independently from the rest at run time.  This can be achieved by
 157 # ensuring that no private .bss symbols exist, as global symbols
 158 # always have a GOT entry which is what we need.
 159 # The .data section is already discarded by the linker script so no need
 160 # to bother about it here.
 161 check_for_bad_syms = \
 162 bad_syms=$$($(CROSS_COMPILE)nm $@ | sed -n 's/^.\{8\} [bc] \(.*\)/\1/p') && \
 163 [ -z "$$bad_syms" ] || \
 164   ( echo "following symbols must have non local/private scope:" >&2; \
 165     echo "$$bad_syms" >&2; rm -f $@; false )
 166
 167 check_for_multiple_zreladdr = \
 168 if [ $(words $(ZRELADDR)) -gt 1 -a "$(CONFIG_AUTO_ZRELADDR)" = "" ]; then \
 169         echo 'multiple zreladdrs: $(ZRELADDR)'; \
 170         echo 'This needs CONFIG_AUTO_ZRELADDR to be set'; \
 171         false; \
 172 fi
 173
 174 $(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.$(suffix_y).o \
 175                 $(addprefix $(obj)/, $(OBJS)) $(lib1funcs) FORCE
 176         @$(check_for_multiple_zreladdr)
 177         $(call if_changed,ld)
 178         @$(check_for_bad_syms)
 179
 180 $(obj)/piggy.$(suffix_y): $(obj)/../Image FORCE
 181         $(call if_changed,$(suffix_y))
 182
 183 $(obj)/piggy.$(suffix_y).o:  $(obj)/piggy.$(suffix_y) FORCE
 184
 185 CFLAGS_font.o := -Dstatic=
 186
 187 $(obj)/font.c: $(FONTC)
 188         $(call cmd,shipped)
 189
 190 $(obj)/vmlinux.lds: $(obj)/vmlinux.lds.in arch/arm/boot/Makefile $(KCONFIG_CONFIG)
 191         @sed "$(SEDFLAGS)" < $< > $@