xref: /linux/arch/arm/boot/compressed/Makefile (revision 5ffb04f6690d71fab241b3562ebf52b893ac4ff1) 
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	= $(srctree)/drivers/video/console/font_acorn_8x8.c
28
29#
30# Architecture dependencies
31#
32ifeq ($(CONFIG_ARCH_ACORN),y)
33OBJS		+= ll_char_wr.o font.o
34endif
35
36ifeq ($(CONFIG_ARCH_SHARK),y)
37OBJS		+= head-shark.o ofw-shark.o
38endif
39
40ifeq ($(CONFIG_ARCH_P720T),y)
41# Borrow this code from SA1100
42OBJS		+= head-sa1100.o
43endif
44
45ifeq ($(CONFIG_ARCH_SA1100),y)
46OBJS		+= head-sa1100.o
47endif
48
49ifeq ($(CONFIG_ARCH_VT8500),y)
50OBJS		+= head-vt8500.o
51endif
52
53ifeq ($(CONFIG_CPU_XSCALE),y)
54OBJS		+= head-xscale.o
55endif
56
57ifeq ($(CONFIG_PXA_SHARPSL_DETECT_MACH_ID),y)
58OBJS		+= head-sharpsl.o
59endif
60
61ifeq ($(CONFIG_CPU_ENDIAN_BE32),y)
62ifeq ($(CONFIG_CPU_CP15),y)
63OBJS		+= big-endian.o
64else
65# The endian should be set by h/w design.
66endif
67endif
68
69ifeq ($(CONFIG_ARCH_SHMOBILE),y)
70OBJS		+= head-shmobile.o
71endif
72
73#
74# We now have a PIC decompressor implementation.  Decompressors running
75# from RAM should not define ZTEXTADDR.  Decompressors running directly
76# from ROM or Flash must define ZTEXTADDR (preferably via the config)
77# FIXME: Previous assignment to ztextaddr-y is lost here. See SHARK
78ifeq ($(CONFIG_ZBOOT_ROM),y)
79ZTEXTADDR	:= $(CONFIG_ZBOOT_ROM_TEXT)
80ZBSSADDR	:= $(CONFIG_ZBOOT_ROM_BSS)
81else
82ZTEXTADDR	:= 0
83ZBSSADDR	:= ALIGN(8)
84endif
85
86SEDFLAGS	= s/TEXT_START/$(ZTEXTADDR)/;s/BSS_START/$(ZBSSADDR)/
87
88suffix_$(CONFIG_KERNEL_GZIP) = gzip
89suffix_$(CONFIG_KERNEL_LZO)  = lzo
90suffix_$(CONFIG_KERNEL_LZMA) = lzma
91
92targets       := vmlinux vmlinux.lds \
93		 piggy.$(suffix_y) piggy.$(suffix_y).o \
94		 font.o font.c head.o misc.o $(OBJS)
95
96# Make sure files are removed during clean
97extra-y       += piggy.gzip piggy.lzo piggy.lzma lib1funcs.S
98
99ifeq ($(CONFIG_FUNCTION_TRACER),y)
100ORIG_CFLAGS := $(KBUILD_CFLAGS)
101KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
102endif
103
104ccflags-y := -fpic -fno-builtin
105asflags-y := -Wa,-march=all
106
107# Supply kernel BSS size to the decompressor via a linker symbol.
108KBSS_SZ = $(shell size $(obj)/../../../../vmlinux | awk 'END{print $$3}')
109LDFLAGS_vmlinux = --defsym _kernel_bss_size=$(KBSS_SZ)
110# Supply ZRELADDR to the decompressor via a linker symbol.
111ifneq ($(CONFIG_AUTO_ZRELADDR),y)
112LDFLAGS_vmlinux += --defsym zreladdr=$(ZRELADDR)
113endif
114ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
115LDFLAGS_vmlinux += --be8
116endif
117# ?
118LDFLAGS_vmlinux += -p
119# Report unresolved symbol references
120LDFLAGS_vmlinux += --no-undefined
121# Delete all temporary local symbols
122LDFLAGS_vmlinux += -X
123# Next argument is a linker script
124LDFLAGS_vmlinux += -T
125
126# For __aeabi_uidivmod
127lib1funcs = $(obj)/lib1funcs.o
128
129$(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S FORCE
130	$(call cmd,shipped)
131
132# We need to prevent any GOTOFF relocs being used with references
133# to symbols in the .bss section since we cannot relocate them
134# independently from the rest at run time.  This can be achieved by
135# ensuring that no private .bss symbols exist, as global symbols
136# always have a GOT entry which is what we need.
137# The .data section is already discarded by the linker script so no need
138# to bother about it here.
139check_for_bad_syms = \
140bad_syms=$$($(CROSS_COMPILE)nm $@ | sed -n 's/^.\{8\} [bc] \(.*\)/\1/p') && \
141[ -z "$$bad_syms" ] || \
142  ( echo "following symbols must have non local/private scope:" >&2; \
143    echo "$$bad_syms" >&2; rm -f $@; false )
144
145$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.$(suffix_y).o \
146	 	$(addprefix $(obj)/, $(OBJS)) $(lib1funcs) FORCE
147	$(call if_changed,ld)
148	@$(check_for_bad_syms)
149
150$(obj)/piggy.$(suffix_y): $(obj)/../Image FORCE
151	$(call if_changed,$(suffix_y))
152
153$(obj)/piggy.$(suffix_y).o:  $(obj)/piggy.$(suffix_y) FORCE
154
155CFLAGS_font.o := -Dstatic=
156
157$(obj)/font.c: $(FONTC)
158	$(call cmd,shipped)
159
160$(obj)/vmlinux.lds: $(obj)/vmlinux.lds.in arch/arm/boot/Makefile $(KCONFIG_CONFIG)
161	@sed "$(SEDFLAGS)" < $< > $@
162