xref: /openbmc/linux/arch/arm/boot/compressed/Makefile (revision 97da55fc) 
1#
2# linux/arch/arm/boot/compressed/Makefile
3#
4# create a compressed vmlinuz image from the original vmlinux
5#
6
7OBJS		=
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.
12ifeq ($(CONFIG_ZBOOT_ROM_MMCIF),y)
13OBJS		+= mmcif-sh7372.o
14endif
15
16# Ensure that SDHI loader code appears early in the image
17# to minimise that number of bocks that have to be read in
18# order to load it.
19ifeq ($(CONFIG_ZBOOT_ROM_SH_MOBILE_SDHI),y)
20OBJS		+= sdhi-shmobile.o
21OBJS		+= sdhi-sh7372.o
22endif
23
24AFLAGS_head.o += -DTEXT_OFFSET=$(TEXT_OFFSET)
25HEAD	= head.o
26OBJS	+= misc.o decompress.o
27FONTC	= $(srctree)/drivers/video/console/font_acorn_8x8.c
28
29# string library code (-Os is enforced to keep it much smaller)
30OBJS		+= string.o
31CFLAGS_string.o	:= -Os
32
33ifeq ($(CONFIG_ARM_VIRT_EXT),y)
34OBJS		+= hyp-stub.o
35endif
36
37#
38# Architecture dependencies
39#
40ifeq ($(CONFIG_ARCH_ACORN),y)
41OBJS		+= ll_char_wr.o font.o
42endif
43
44ifeq ($(CONFIG_ARCH_SHARK),y)
45OBJS		+= head-shark.o ofw-shark.o
46endif
47
48ifeq ($(CONFIG_ARCH_SA1100),y)
49OBJS		+= head-sa1100.o
50endif
51
52ifeq ($(CONFIG_CPU_XSCALE),y)
53OBJS		+= head-xscale.o
54endif
55
56ifeq ($(CONFIG_PXA_SHARPSL_DETECT_MACH_ID),y)
57OBJS		+= head-sharpsl.o
58endif
59
60ifeq ($(CONFIG_CPU_ENDIAN_BE32),y)
61ifeq ($(CONFIG_CPU_CP15),y)
62OBJS		+= big-endian.o
63else
64# The endian should be set by h/w design.
65endif
66endif
67
68ifeq ($(CONFIG_ARCH_SHMOBILE),y)
69OBJS		+= head-shmobile.o
70endif
71
72#
73# We now have a PIC decompressor implementation.  Decompressors running
74# from RAM should not define ZTEXTADDR.  Decompressors running directly
75# from ROM or Flash must define ZTEXTADDR (preferably via the config)
76# FIXME: Previous assignment to ztextaddr-y is lost here. See SHARK
77ifeq ($(CONFIG_ZBOOT_ROM),y)
78ZTEXTADDR	:= $(CONFIG_ZBOOT_ROM_TEXT)
79ZBSSADDR	:= $(CONFIG_ZBOOT_ROM_BSS)
80else
81ZTEXTADDR	:= 0
82ZBSSADDR	:= ALIGN(8)
83endif
84
85SEDFLAGS	= s/TEXT_START/$(ZTEXTADDR)/;s/BSS_START/$(ZBSSADDR)/
86
87suffix_$(CONFIG_KERNEL_GZIP) = gzip
88suffix_$(CONFIG_KERNEL_LZO)  = lzo
89suffix_$(CONFIG_KERNEL_LZMA) = lzma
90suffix_$(CONFIG_KERNEL_XZ)   = xzkern
91
92# Borrowed libfdt files for the ATAG compatibility mode
93
94libfdt		:= fdt_rw.c fdt_ro.c fdt_wip.c fdt.c
95libfdt_hdrs	:= fdt.h libfdt.h libfdt_internal.h
96
97libfdt_objs	:= $(addsuffix .o, $(basename $(libfdt)))
98
99$(addprefix $(obj)/,$(libfdt) $(libfdt_hdrs)): $(obj)/%: $(srctree)/scripts/dtc/libfdt/%
100	$(call cmd,shipped)
101
102$(addprefix $(obj)/,$(libfdt_objs) atags_to_fdt.o): \
103	$(addprefix $(obj)/,$(libfdt_hdrs))
104
105ifeq ($(CONFIG_ARM_ATAG_DTB_COMPAT),y)
106OBJS	+= $(libfdt_objs) atags_to_fdt.o
107endif
108
109targets       := vmlinux vmlinux.lds \
110		 piggy.$(suffix_y) piggy.$(suffix_y).o \
111		 lib1funcs.o lib1funcs.S ashldi3.o ashldi3.S \
112		 font.o font.c head.o misc.o $(OBJS)
113
114# Make sure files are removed during clean
115extra-y       += piggy.gzip piggy.lzo piggy.lzma piggy.xzkern \
116		 lib1funcs.S ashldi3.S $(libfdt) $(libfdt_hdrs)
117
118ifeq ($(CONFIG_FUNCTION_TRACER),y)
119ORIG_CFLAGS := $(KBUILD_CFLAGS)
120KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
121endif
122
123ccflags-y := -fpic -mno-single-pic-base -fno-builtin -I$(obj)
124asflags-y := -Wa,-march=all -DZIMAGE
125
126# Supply kernel BSS size to the decompressor via a linker symbol.
127KBSS_SZ = $(shell $(CROSS_COMPILE)size $(obj)/../../../../vmlinux | \
128		awk 'END{print $$3}')
129LDFLAGS_vmlinux = --defsym _kernel_bss_size=$(KBSS_SZ)
130# Supply ZRELADDR to the decompressor via a linker symbol.
131ifneq ($(CONFIG_AUTO_ZRELADDR),y)
132LDFLAGS_vmlinux += --defsym zreladdr=$(ZRELADDR)
133endif
134ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
135LDFLAGS_vmlinux += --be8
136endif
137# ?
138LDFLAGS_vmlinux += -p
139# Report unresolved symbol references
140LDFLAGS_vmlinux += --no-undefined
141# Delete all temporary local symbols
142LDFLAGS_vmlinux += -X
143# Next argument is a linker script
144LDFLAGS_vmlinux += -T
145
146# For __aeabi_uidivmod
147lib1funcs = $(obj)/lib1funcs.o
148
149$(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S
150	$(call cmd,shipped)
151
152# For __aeabi_llsl
153ashldi3 = $(obj)/ashldi3.o
154
155$(obj)/ashldi3.S: $(srctree)/arch/$(SRCARCH)/lib/ashldi3.S
156	$(call cmd,shipped)
157
158# We need to prevent any GOTOFF relocs being used with references
159# to symbols in the .bss section since we cannot relocate them
160# independently from the rest at run time.  This can be achieved by
161# ensuring that no private .bss symbols exist, as global symbols
162# always have a GOT entry which is what we need.
163# The .data section is already discarded by the linker script so no need
164# to bother about it here.
165check_for_bad_syms = \
166bad_syms=$$($(CROSS_COMPILE)nm $@ | sed -n 's/^.\{8\} [bc] \(.*\)/\1/p') && \
167[ -z "$$bad_syms" ] || \
168  ( echo "following symbols must have non local/private scope:" >&2; \
169    echo "$$bad_syms" >&2; rm -f $@; false )
170
171check_for_multiple_zreladdr = \
172if [ $(words $(ZRELADDR)) -gt 1 -a "$(CONFIG_AUTO_ZRELADDR)" = "" ]; then \
173	echo 'multiple zreladdrs: $(ZRELADDR)'; \
174	echo 'This needs CONFIG_AUTO_ZRELADDR to be set'; \
175	false; \
176fi
177
178$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.$(suffix_y).o \
179		$(addprefix $(obj)/, $(OBJS)) $(lib1funcs) $(ashldi3) FORCE
180	@$(check_for_multiple_zreladdr)
181	$(call if_changed,ld)
182	@$(check_for_bad_syms)
183
184$(obj)/piggy.$(suffix_y): $(obj)/../Image FORCE
185	$(call if_changed,$(suffix_y))
186
187$(obj)/piggy.$(suffix_y).o:  $(obj)/piggy.$(suffix_y) FORCE
188
189CFLAGS_font.o := -Dstatic=
190
191$(obj)/font.c: $(FONTC)
192	$(call cmd,shipped)
193
194$(obj)/vmlinux.lds: $(obj)/vmlinux.lds.in arch/arm/boot/Makefile $(KCONFIG_CONFIG)
195	@sed "$(SEDFLAGS)" < $< > $@
196
197$(obj)/hyp-stub.S: $(srctree)/arch/$(SRCARCH)/kernel/hyp-stub.S
198	$(call cmd,shipped)
199