Makefile

  1#
  2# arch/x86/boot/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# Copyright (C) 1994 by Linus Torvalds
  9# Changed by many, many contributors over the years.
 10#
 11
 12# If you want to preset the SVGA mode, uncomment the next line and
 13# set SVGA_MODE to whatever number you want.
 14# Set it to -DSVGA_MODE=NORMAL_VGA if you just want the EGA/VGA mode.
 15# The number is the same as you would ordinarily press at bootup.
 16
 17SVGA_MODE	:= -DSVGA_MODE=NORMAL_VGA
 18
 19targets		:= vmlinux.bin setup.bin setup.elf bzImage
 20targets		+= fdimage fdimage144 fdimage288 image.iso hdimage
 21subdir-		:= compressed
 22
 23setup-y		+= a20.o bioscall.o cmdline.o copy.o cpu.o cpuflags.o cpucheck.o
 24setup-y		+= early_serial_console.o edd.o header.o main.o memory.o
 25setup-y		+= pm.o pmjump.o printf.o regs.o string.o tty.o video.o
 26setup-y		+= video-mode.o version.o
 27setup-$(CONFIG_X86_APM_BOOT) += apm.o
 28
 29# The link order of the video-*.o modules can matter.  In particular,
 30# video-vga.o *must* be listed first, followed by video-vesa.o.
 31# Hardware-specific drivers should follow in the order they should be
 32# probed, and video-bios.o should typically be last.
 33setup-y		+= video-vga.o
 34setup-y		+= video-vesa.o
 35setup-y		+= video-bios.o
 36
 37targets		+= $(setup-y)
 38hostprogs	+= mkcpustr
 39
 40HOST_EXTRACFLAGS += -I$(srctree)/tools/include \
 41		    -include include/generated/autoconf.h \
 42	            -D__EXPORTED_HEADERS__
 43
 44$(obj)/cpu.o: $(obj)/cpustr.h
 45
 46quiet_cmd_cpustr = CPUSTR  $@
 47      cmd_cpustr = $(obj)/mkcpustr > $@
 48$(obj)/cpustr.h: $(obj)/mkcpustr FORCE
 49	$(call if_changed,cpustr)
 50targets += cpustr.h
 51
 52# ---------------------------------------------------------------------------
 53
 54KBUILD_CFLAGS	:= $(REALMODE_CFLAGS) -D_SETUP
 55KBUILD_AFLAGS	:= $(KBUILD_CFLAGS) -D__ASSEMBLY__
 56KBUILD_CFLAGS	+= -fno-asynchronous-unwind-tables
 57KBUILD_CFLAGS	+= $(CONFIG_CC_IMPLICIT_FALLTHROUGH)
 58
 59$(obj)/bzImage: asflags-y  := $(SVGA_MODE)
 60
 61quiet_cmd_image = BUILD   $@
 62      cmd_image = (dd if=$< bs=4k conv=sync status=none; cat $(filter-out $<,$(real-prereqs))) >$@
 63
 64$(obj)/bzImage: $(obj)/setup.bin $(obj)/vmlinux.bin FORCE
 65	$(call if_changed,image)
 66	@$(kecho) 'Kernel: $@ is ready' ' (#'$(or $(KBUILD_BUILD_VERSION),`cat .version`)')'
 67
 68OBJCOPYFLAGS_vmlinux.bin := -O binary -R .note -R .comment -S
 69$(obj)/vmlinux.bin: $(obj)/compressed/vmlinux FORCE
 70	$(call if_changed,objcopy)
 71
 72SETUP_OBJS = $(addprefix $(obj)/,$(setup-y))
 73
 74sed-zoffset := -e 's/^\([0-9a-fA-F]*\) [a-zA-Z] \(startup_32\|efi.._stub_entry\|efi\(32\)\?_pe_entry\|input_data\|kernel_info\|_end\|_ehead\|_text\|_e\?data\|_e\?sbat\|z_.*\)$$/\#define ZO_\2 0x\1/p'
 75
 76quiet_cmd_zoffset = ZOFFSET $@
 77      cmd_zoffset = $(NM) $< | sed -n $(sed-zoffset) > $@
 78
 79targets += zoffset.h
 80$(obj)/zoffset.h: $(obj)/compressed/vmlinux FORCE
 81	$(call if_changed,zoffset)
 82
 83
 84AFLAGS_header.o += -I$(objtree)/$(obj)
 85$(obj)/header.o: $(obj)/zoffset.h
 86
 87LDFLAGS_setup.elf	:= -m elf_i386 -z noexecstack -T
 88$(obj)/setup.elf: $(src)/setup.ld $(SETUP_OBJS) FORCE
 89	$(call if_changed,ld)
 90
 91OBJCOPYFLAGS_setup.bin	:= -O binary
 92$(obj)/setup.bin: $(obj)/setup.elf FORCE
 93	$(call if_changed,objcopy)
 94
 95$(obj)/compressed/vmlinux: FORCE
 96	$(Q)$(MAKE) $(build)=$(obj)/compressed $@
 97
 98# Set this if you want to pass append arguments to the
 99# bzdisk/fdimage/hdimage/isoimage kernel
100FDARGS =
101# Set this if you want one or more initrds included in the image
102FDINITRD =
103
104imgdeps = $(obj)/bzImage $(obj)/mtools.conf $(src)/genimage.sh
105
106$(obj)/mtools.conf: $(src)/mtools.conf.in
107	sed -e 's|@OBJ@|$(obj)|g' < $< > $@
108
109targets += mtools.conf
110
111# genimage.sh requires bash, but it also has a bunch of other
112# external dependencies.
113quiet_cmd_genimage = GENIMAGE $3
114      cmd_genimage = $(BASH) $(src)/genimage.sh $2 $3 $(obj)/bzImage \
115		$(obj)/mtools.conf '$(FDARGS)' $(FDINITRD)
116
117PHONY += bzdisk fdimage fdimage144 fdimage288 hdimage isoimage
118
119# This requires write access to /dev/fd0
120# All images require syslinux to be installed; hdimage also requires
121# EDK2/OVMF if the kernel is compiled with the EFI stub.
122bzdisk: $(imgdeps)
123	$(call cmd,genimage,bzdisk,/dev/fd0)
124
125fdimage fdimage144: $(imgdeps)
126	$(call cmd,genimage,fdimage144,$(obj)/fdimage)
127	@$(kecho) 'Kernel: $(obj)/fdimage is ready'
128
129fdimage288: $(imgdeps)
130	$(call cmd,genimage,fdimage288,$(obj)/fdimage)
131	@$(kecho) 'Kernel: $(obj)/fdimage is ready'
132
133hdimage: $(imgdeps)
134	$(call cmd,genimage,hdimage,$(obj)/hdimage)
135	@$(kecho) 'Kernel: $(obj)/hdimage is ready'
136
137isoimage: $(imgdeps)
138	$(call cmd,genimage,isoimage,$(obj)/image.iso)
139	@$(kecho) 'Kernel: $(obj)/image.iso is ready'