xref: /linux/arch/powerpc/boot/Makefile (revision f24e9f586b377749dff37554696cf3a105540c94) 
1# Makefile for making ELF bootable images for booting on CHRP
2# using Open Firmware.
3#
4# Geert Uytterhoeven	September 1997
5#
6# Based on coffboot by Paul Mackerras
7# Simplified for ppc64 by Todd Inglett
8#
9# NOTE:	this code is built for 32 bit in ELF32 format even though
10#	it packages a 64 bit kernel.  We do this to simplify the
11#	bootloader and increase compatibility with OpenFirmware.
12#
13#	To this end we need to define BOOTCC, etc, as the tools
14#	needed to build the 32 bit image.  These are normally HOSTCC,
15#	but may be a third compiler if, for example, you are cross
16#	compiling from an intel box.  Once the 64bit ppc gcc is
17#	stable it will probably simply be a compiler switch to
18#	compile for 32bit mode.
19#	To make it easier to setup a cross compiler,
20#	CROSS32_COMPILE is setup as a prefix just like CROSS_COMPILE
21#	in the toplevel makefile.
22
23
24HOSTCC		:= gcc
25BOOTCFLAGS	:= $(HOSTCFLAGS) -fno-builtin -nostdinc -isystem \
26		   $(shell $(CROSS32CC) -print-file-name=include) -fPIC
27BOOTAFLAGS	:= -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional -nostdinc
28OBJCOPYFLAGS    := contents,alloc,load,readonly,data
29OBJCOPY_COFF_ARGS := -O aixcoff-rs6000 --set-start 0x500000
30OBJCOPY_MIB_ARGS  := -O aixcoff-rs6000 -R .stab -R .stabstr -R .comment
31
32zlib       := inffast.c inflate.c inftrees.c
33zlibheader := inffast.h inffixed.h inflate.h inftrees.h infutil.h
34zliblinuxheader := zlib.h zconf.h zutil.h
35
36$(addprefix $(obj)/,$(zlib) main.o): $(addprefix $(obj)/,$(zliblinuxheader)) $(addprefix $(obj)/,$(zlibheader))
37#$(addprefix $(obj)/,main.o): $(addprefix $(obj)/,zlib.h)
38
39src-boot-$(CONFIG_PPC_MULTIPLATFORM) := of.c
40src-boot := crt0.S string.S stdio.c main.c div64.S $(src-boot-y)
41src-boot += $(zlib)
42src-boot := $(addprefix $(obj)/, $(src-boot))
43obj-boot := $(addsuffix .o, $(basename $(src-boot)))
44
45ifeq ($(call cc-option-yn, -fstack-protector),y)
46BOOTCFLAGS	+= -fno-stack-protector
47endif
48
49BOOTCFLAGS	+= -I$(obj) -I$(srctree)/$(obj)
50
51quiet_cmd_copy_zlib = COPY    $@
52      cmd_copy_zlib = sed "s@__attribute_used__@@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
53
54quiet_cmd_copy_zlibheader = COPY    $@
55      cmd_copy_zlibheader = sed "s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
56# stddef.h for NULL
57quiet_cmd_copy_zliblinuxheader = COPY    $@
58      cmd_copy_zliblinuxheader = sed "s@<linux/string.h>@\"string.h\"@;s@<linux/kernel.h>@<stddef.h>@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
59
60$(addprefix $(obj)/,$(zlib)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
61	$(call cmd,copy_zlib)
62
63$(addprefix $(obj)/,$(zlibheader)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
64	$(call cmd,copy_zlibheader)
65
66$(addprefix $(obj)/,$(zliblinuxheader)): $(obj)/%: $(srctree)/include/linux/%
67	$(call cmd,copy_zliblinuxheader)
68
69clean-files := $(zlib) $(zlibheader) $(zliblinuxheader)
70
71
72quiet_cmd_bootcc = BOOTCC  $@
73      cmd_bootcc = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTCFLAGS) -c -o $@ $<
74
75quiet_cmd_bootas = BOOTAS  $@
76      cmd_bootas = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTAFLAGS) -c -o $@ $<
77
78quiet_cmd_bootld = BOOTLD  $@
79      cmd_bootld = $(CROSS32LD) -T $(srctree)/$(src)/$(3) -o $@ $(2)
80
81$(patsubst %.c,%.o, $(filter %.c, $(src-boot))): %.o: %.c
82	$(call if_changed_dep,bootcc)
83$(patsubst %.S,%.o, $(filter %.S, $(src-boot))): %.o: %.S
84	$(call if_changed_dep,bootas)
85
86#-----------------------------------------------------------
87# ELF sections within the zImage bootloader/wrapper
88#-----------------------------------------------------------
89required := vmlinux.strip
90initrd   := initrd
91
92obj-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.o, $(section)))
93src-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.c, $(section)))
94gz-sec  = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.gz, $(section)))
95
96hostprogs-y		:= addnote addRamDisk hack-coff
97
98targets += zImage.vmode zImage.initrd.vmode zImage zImage.initrd \
99	   zImage.coff zImage.initrd.coff miboot.image miboot.initrd.image \
100	   $(patsubst $(obj)/%,%, $(call obj-sec, $(required) $(initrd))) \
101	   $(patsubst $(obj)/%,%, $(call src-sec, $(required) $(initrd))) \
102	   $(patsubst $(obj)/%,%, $(call gz-sec, $(required) $(initrd))) \
103	   vmlinux.initrd dummy.o
104extra-y			:= initrd.o
105
106quiet_cmd_ramdisk = RAMDISK $@
107      cmd_ramdisk = $(obj)/addRamDisk $(obj)/ramdisk.image.gz $< $@
108
109quiet_cmd_stripvm = STRIP   $@
110      cmd_stripvm = $(STRIP) -s -R .comment $< -o $@
111
112vmlinux.strip: vmlinux
113	$(call if_changed,stripvm)
114$(obj)/vmlinux.initrd: vmlinux.strip $(obj)/addRamDisk $(obj)/ramdisk.image.gz
115	$(call if_changed,ramdisk)
116
117quiet_cmd_addsection = ADDSEC  $@
118      cmd_addsection = $(CROSS32OBJCOPY) $@ \
119		--add-section=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $@))=$(patsubst %.o,%.gz, $@) \
120		--set-section-flags=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $@))=$(OBJCOPYFLAGS)
121
122quiet_cmd_addnote = ADDNOTE $@
123      cmd_addnote = $(obj)/addnote $@
124
125quiet_cmd_gen-miboot = GEN     $@
126      cmd_gen-miboot = $(OBJCOPY) $(OBJCOPY_MIB_ARGS) \
127		       --add-section=$1=$(word 2, $^) $< $@
128
129quiet_cmd_gencoff = COFF    $@
130      cmd_gencoff = $(OBJCOPY) $(OBJCOPY_COFF_ARGS) $@ && \
131		    $(obj)/hack-coff $@
132
133$(call gz-sec, $(required)): $(obj)/kernel-%.gz: %
134	$(call if_changed,gzip)
135
136$(obj)/kernel-initrd.gz: $(obj)/ramdisk.image.gz
137	cp -f $(obj)/ramdisk.image.gz $@
138
139$(call src-sec, $(required) $(initrd)): $(obj)/kernel-%.c: $(obj)/kernel-%.gz
140	@touch $@
141
142$(call obj-sec, $(required) $(initrd)): $(obj)/kernel-%.o: $(obj)/kernel-%.c
143	$(call if_changed_dep,bootcc)
144	$(call cmd,addsection)
145
146$(obj)/zImage.vmode $(obj)/zImage.coff: obj-boot += $(call obj-sec, $(required))
147$(obj)/zImage.vmode: $(call obj-sec, $(required)) $(obj-boot) $(srctree)/$(src)/zImage.lds
148	$(call cmd,bootld,$(obj-boot),zImage.lds)
149
150$(obj)/zImage.initrd.vmode $(obj)/zImage.initrd.coff: obj-boot += $(call obj-sec, $(required) $(initrd))
151$(obj)/zImage.initrd.vmode: $(call obj-sec, $(required) $(initrd)) $(obj-boot) $(srctree)/$(src)/zImage.lds
152	$(call cmd,bootld,$(obj-boot),zImage.lds)
153
154# For 32-bit powermacs, build the COFF and miboot images
155# as well as the ELF images.
156coffimage-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/zImage.coff
157coffrdimg-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/zImage.initrd.coff
158mibootimg-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/miboot.image
159mibrdimg-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32)  := $(obj)/miboot.initrd.image
160
161$(obj)/zImage: $(obj)/zImage.vmode $(obj)/addnote $(coffimage-y-y) \
162			$(mibootimg-y-y)
163	@cp -f $< $@
164	$(call if_changed,addnote)
165
166$(obj)/zImage.initrd: $(obj)/zImage.initrd.vmode $(obj)/addnote \
167			$(coffrdimg-y-y) $(mibrdimg-y-y)
168	@cp -f $< $@
169	$(call if_changed,addnote)
170
171$(obj)/zImage.coff: $(call obj-sec, $(required)) $(obj-boot) \
172			$(srctree)/$(src)/zImage.coff.lds $(obj)/hack-coff
173	$(call cmd,bootld,$(obj-boot),zImage.coff.lds)
174	$(call cmd,gencoff)
175
176$(obj)/zImage.initrd.coff: $(call obj-sec, $(required) $(initrd)) $(obj-boot) \
177			   $(srctree)/$(src)/zImage.coff.lds $(obj)/hack-coff
178	$(call cmd,bootld,$(obj-boot),zImage.coff.lds)
179	$(call cmd,gencoff)
180
181$(obj)/miboot.image: $(obj)/dummy.o $(obj)/vmlinux.gz
182	$(call cmd,gen-miboot,image)
183
184$(obj)/miboot.initrd.image: $(obj)/miboot.image $(images)/ramdisk.image.gz
185	$(call cmd,gen-miboot,initrd)
186
187#-----------------------------------------------------------
188# build u-boot images
189#-----------------------------------------------------------
190quiet_cmd_mygzip = GZIP $@
191cmd_mygzip = gzip -f -9 < $< > $@.$$$$ && mv $@.$$$$ $@
192
193quiet_cmd_objbin = OBJCOPY $@
194      cmd_objbin = $(OBJCOPY) -O binary $< $@
195
196quiet_cmd_uimage = UIMAGE $@
197      cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A ppc -O linux -T kernel \
198               -C gzip -a 00000000 -e 00000000 -n 'Linux-$(KERNELRELEASE)' \
199               -d $< $@
200
201MKIMAGE		:= $(srctree)/scripts/mkuboot.sh
202targets		+= uImage
203extra-y		+= vmlinux.bin vmlinux.gz
204
205$(obj)/vmlinux.bin: vmlinux FORCE
206	$(call if_changed,objbin)
207
208$(obj)/vmlinux.gz: $(obj)/vmlinux.bin FORCE
209	$(call if_changed,mygzip)
210
211$(obj)/uImage: $(obj)/vmlinux.gz
212	$(Q)rm -f $@
213	$(call cmd,uimage)
214	@echo -n '  Image: $@ '
215	@if [ -f $@ ]; then echo 'is ready' ; else echo 'not made'; fi
216
217install: $(CONFIGURE) $(BOOTIMAGE)
218	sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)" "$(BOOTIMAGE)"
219
220clean-files += $(addprefix $(objtree)/, $(obj-boot) vmlinux.strip)
221