xref: /linux/arch/arm/boot/compressed/Makefile (revision b43ab901d671e3e3cad425ea5e9a3c74e266dcdd) 
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	= $(srctree)/drivers/video/console/font_acorn_8x8.c
28
29# string library code (-Os is enforced to keep it much smaller)
30OBJS		+= string.o
31CFLAGS_string.o	:= -Os
32
33#
34# Architecture dependencies
35#
36ifeq ($(CONFIG_ARCH_ACORN),y)
37OBJS		+= ll_char_wr.o font.o
38endif
39
40ifeq ($(CONFIG_ARCH_SHARK),y)
41OBJS		+= head-shark.o ofw-shark.o
42endif
43
44ifeq ($(CONFIG_ARCH_P720T),y)
45# Borrow this code from SA1100
46OBJS		+= head-sa1100.o
47endif
48
49ifeq ($(CONFIG_ARCH_SA1100),y)
50OBJS		+= head-sa1100.o
51endif
52
53ifeq ($(CONFIG_ARCH_VT8500),y)
54OBJS		+= head-vt8500.o
55endif
56
57ifeq ($(CONFIG_CPU_XSCALE),y)
58OBJS		+= head-xscale.o
59endif
60
61ifeq ($(CONFIG_PXA_SHARPSL_DETECT_MACH_ID),y)
62OBJS		+= head-sharpsl.o
63endif
64
65ifeq ($(CONFIG_CPU_ENDIAN_BE32),y)
66ifeq ($(CONFIG_CPU_CP15),y)
67OBJS		+= big-endian.o
68else
69# The endian should be set by h/w design.
70endif
71endif
72
73ifeq ($(CONFIG_ARCH_SHMOBILE),y)
74OBJS		+= head-shmobile.o
75endif
76
77#
78# We now have a PIC decompressor implementation.  Decompressors running
79# from RAM should not define ZTEXTADDR.  Decompressors running directly
80# from ROM or Flash must define ZTEXTADDR (preferably via the config)
81# FIXME: Previous assignment to ztextaddr-y is lost here. See SHARK
82ifeq ($(CONFIG_ZBOOT_ROM),y)
83ZTEXTADDR	:= $(CONFIG_ZBOOT_ROM_TEXT)
84ZBSSADDR	:= $(CONFIG_ZBOOT_ROM_BSS)
85else
86ZTEXTADDR	:= 0
87ZBSSADDR	:= ALIGN(8)
88endif
89
90SEDFLAGS	= s/TEXT_START/$(ZTEXTADDR)/;s/BSS_START/$(ZBSSADDR)/
91
92suffix_$(CONFIG_KERNEL_GZIP) = gzip
93suffix_$(CONFIG_KERNEL_LZO)  = lzo
94suffix_$(CONFIG_KERNEL_LZMA) = lzma
95
96# Borrowed libfdt files for the ATAG compatibility mode
97
98libfdt		:= fdt_rw.c fdt_ro.c fdt_wip.c fdt.c
99libfdt_hdrs	:= fdt.h libfdt.h libfdt_internal.h
100
101libfdt_objs	:= $(addsuffix .o, $(basename $(libfdt)))
102
103$(addprefix $(obj)/,$(libfdt) $(libfdt_hdrs)): $(obj)/%: $(srctree)/scripts/dtc/libfdt/%
104	$(call cmd,shipped)
105
106$(addprefix $(obj)/,$(libfdt_objs) atags_to_fdt.o): \
107	$(addprefix $(obj)/,$(libfdt_hdrs))
108
109ifeq ($(CONFIG_ARM_ATAG_DTB_COMPAT),y)
110OBJS	+= $(libfdt_objs) atags_to_fdt.o
111endif
112
113targets       := vmlinux vmlinux.lds \
114		 piggy.$(suffix_y) piggy.$(suffix_y).o \
115		 lib1funcs.o lib1funcs.S font.o font.c head.o misc.o $(OBJS)
116
117# Make sure files are removed during clean
118extra-y       += piggy.gzip piggy.lzo piggy.lzma lib1funcs.S $(libfdt) $(libfdt_hdrs)
119
120ifeq ($(CONFIG_FUNCTION_TRACER),y)
121ORIG_CFLAGS := $(KBUILD_CFLAGS)
122KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
123endif
124
125ccflags-y := -fpic -fno-builtin -I$(obj)
126asflags-y := -Wa,-march=all
127
128# Supply kernel BSS size to the decompressor via a linker symbol.
129KBSS_SZ = $(shell $(CROSS_COMPILE)size $(obj)/../../../../vmlinux | \
130		awk 'END{print $$3}')
131LDFLAGS_vmlinux = --defsym _kernel_bss_size=$(KBSS_SZ)
132# Supply ZRELADDR to the decompressor via a linker symbol.
133ifneq ($(CONFIG_AUTO_ZRELADDR),y)
134LDFLAGS_vmlinux += --defsym zreladdr=$(ZRELADDR)
135endif
136ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
137LDFLAGS_vmlinux += --be8
138endif
139# ?
140LDFLAGS_vmlinux += -p
141# Report unresolved symbol references
142LDFLAGS_vmlinux += --no-undefined
143# Delete all temporary local symbols
144LDFLAGS_vmlinux += -X
145# Next argument is a linker script
146LDFLAGS_vmlinux += -T
147
148# For __aeabi_uidivmod
149lib1funcs = $(obj)/lib1funcs.o
150
151$(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S
152	$(call cmd,shipped)
153
154# We need to prevent any GOTOFF relocs being used with references
155# to symbols in the .bss section since we cannot relocate them
156# independently from the rest at run time.  This can be achieved by
157# ensuring that no private .bss symbols exist, as global symbols
158# always have a GOT entry which is what we need.
159# The .data section is already discarded by the linker script so no need
160# to bother about it here.
161check_for_bad_syms = \
162bad_syms=$$($(CROSS_COMPILE)nm $@ | sed -n 's/^.\{8\} [bc] \(.*\)/\1/p') && \
163[ -z "$$bad_syms" ] || \
164  ( echo "following symbols must have non local/private scope:" >&2; \
165    echo "$$bad_syms" >&2; rm -f $@; false )
166
167check_for_multiple_zreladdr = \
168if [ $(words $(ZRELADDR)) -gt 1 -a "$(CONFIG_AUTO_ZRELADDR)" = "" ]; then \
169	echo 'multiple zreladdrs: $(ZRELADDR)'; \
170	echo 'This needs CONFIG_AUTO_ZRELADDR to be set'; \
171	false; \
172fi
173
174$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.$(suffix_y).o \
175	 	$(addprefix $(obj)/, $(OBJS)) $(lib1funcs) FORCE
176	@$(check_for_multiple_zreladdr)
177	$(call if_changed,ld)
178	@$(check_for_bad_syms)
179
180$(obj)/piggy.$(suffix_y): $(obj)/../Image FORCE
181	$(call if_changed,$(suffix_y))
182
183$(obj)/piggy.$(suffix_y).o:  $(obj)/piggy.$(suffix_y) FORCE
184
185CFLAGS_font.o := -Dstatic=
186
187$(obj)/font.c: $(FONTC)
188	$(call cmd,shipped)
189
190$(obj)/vmlinux.lds: $(obj)/vmlinux.lds.in arch/arm/boot/Makefile $(KCONFIG_CONFIG)
191	@sed "$(SEDFLAGS)" < $< > $@
192