2 # arch/x86/realmode/Makefile
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
10 always := realmode.bin
12 realmode-y += header.o
13 realmode-y += trampoline_$(BITS).o
15 realmode-$(CONFIG_X86_32) += reboot_32.o
16 realmode-$(CONFIG_ACPI_SLEEP) += $(wakeup-objs)
18 wakeup-objs := wakeup_asm.o wakemain.o video-mode.o
19 wakeup-objs += copy.o bioscall.o regs.o
20 # The link order of the video-*.o modules can matter. In particular,
21 # video-vga.o *must* be listed first, followed by video-vesa.o.
22 # Hardware-specific drivers should follow in the order they should be
23 # probed, and video-bios.o should typically be last.
24 wakeup-objs += video-vga.o
25 wakeup-objs += video-vesa.o
26 wakeup-objs += video-bios.o
28 targets += $(realmode-y)
30 REALMODE_OBJS = $(addprefix $(obj)/,$(realmode-y))
32 sed-pasyms := -n -r -e 's/^([0-9a-fA-F]+) [ABCDGRSTVW] (.+)$$/pa_\2 = \2;/p'
34 quiet_cmd_pasyms = PASYMS $@
35 cmd_pasyms = $(NM) $(filter-out FORCE,$^) | \
36 sed $(sed-pasyms) | sort | uniq > $@
38 $(obj)/pasyms.h: $(REALMODE_OBJS) FORCE
39 $(call if_changed,pasyms)
41 $(obj)/realmode.lds: $(obj)/pasyms.h
43 LDFLAGS_realmode.elf := --emit-relocs -T
44 CPPFLAGS_realmode.lds += -P -C -I$(obj)
46 $(obj)/realmode.elf: $(obj)/realmode.lds $(REALMODE_OBJS) FORCE
49 OBJCOPYFLAGS_realmode.bin := -O binary
51 $(obj)/realmode.bin: $(obj)/realmode.elf
52 $(call if_changed,objcopy)
54 quiet_cmd_relocs = RELOCS $@
55 cmd_relocs = scripts/x86-relocs --realmode $< > $@
56 $(obj)/realmode.relocs: $(obj)/realmode.elf FORCE
57 $(call if_changed,relocs)
59 # ---------------------------------------------------------------------------
61 # How to compile the 16-bit code. Note we always compile for -march=i386,
62 # that way we can complain to the user if the CPU is insufficient.
63 KBUILD_CFLAGS := $(LINUXINCLUDE) -m32 -g -Os -D_SETUP -D__KERNEL__ -D_WAKEUP \
64 -I$(srctree)/arch/x86/boot \
65 -DDISABLE_BRANCH_PROFILING \
66 -Wall -Wstrict-prototypes \
67 -march=i386 -mregparm=3 \
68 -include $(srctree)/$(src)/../../boot/code16gcc.h \
69 -fno-strict-aliasing -fomit-frame-pointer \
70 $(call cc-option, -ffreestanding) \
71 $(call cc-option, -fno-toplevel-reorder,\
72 $(call cc-option, -fno-unit-at-a-time)) \
73 $(call cc-option, -fno-stack-protector) \
74 $(call cc-option, -mpreferred-stack-boundary=2)
75 KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__