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   1 #
   2 # arch/x86/kernel/acpi/realmode/Makefile
   3 #
   4 # This file is subject to the terms and conditions of the GNU General Public
   5 # License.  See the file "COPYING" in the main directory of this archive
   6 # for more details.
   7 #
   8
   9 always          := wakeup.bin
  10 targets         := wakeup.elf wakeup.lds
  11
  12 wakeup-y        += wakeup.o wakemain.o video-mode.o copy.o
  13
  14 # The link order of the video-*.o modules can matter.  In particular,
  15 # video-vga.o *must* be listed first, followed by video-vesa.o.
  16 # Hardware-specific drivers should follow in the order they should be
  17 # probed, and video-bios.o should typically be last.
  18 wakeup-y        += video-vga.o
  19 wakeup-y        += video-vesa.o
  20 wakeup-y        += video-bios.o
  21
  22 targets         += $(wakeup-y)
  23
  24 bootsrc         := $(src)/../../../boot
  25
  26 # ---------------------------------------------------------------------------
  27
  28 # How to compile the 16-bit code.  Note we always compile for -march=i386,
  29 # that way we can complain to the user if the CPU is insufficient.
  30 # Compile with _SETUP since this is similar to the boot-time setup code.
  31 KBUILD_CFLAGS   := $(LINUXINCLUDE) -g -Os -D_SETUP -D_WAKEUP -D__KERNEL__ \
  32                    -I$(srctree)/$(bootsrc) \
  33                    $(cflags-y) \
  34                    -Wall -Wstrict-prototypes \
  35                    -march=i386 -mregparm=3 \
  36                    -include $(srctree)/$(bootsrc)/code16gcc.h \
  37                    -fno-strict-aliasing -fomit-frame-pointer \
  38                    $(call cc-option, -ffreestanding) \
  39                    $(call cc-option, -fno-toplevel-reorder,\
  40                         $(call cc-option, -fno-unit-at-a-time)) \
  41                    $(call cc-option, -fno-stack-protector) \
  42                    $(call cc-option, -mpreferred-stack-boundary=2)
  43 KBUILD_CFLAGS   += $(call cc-option, -m32)
  44 KBUILD_AFLAGS   := $(KBUILD_CFLAGS) -D__ASSEMBLY__
  45
  46 WAKEUP_OBJS = $(addprefix $(obj)/,$(wakeup-y))
  47
  48 LDFLAGS_wakeup.elf      := -T
  49
  50 CPPFLAGS_wakeup.lds += -P -C
  51
  52 $(obj)/wakeup.elf: $(obj)/wakeup.lds $(WAKEUP_OBJS) FORCE
  53         $(call if_changed,ld)
  54
  55 OBJCOPYFLAGS_wakeup.bin := -O binary
  56
  57 $(obj)/wakeup.bin: $(obj)/wakeup.elf FORCE
  58         $(call if_changed,objcopy)