xref: /linux/arch/arm/boot/compressed/Makefile (revision df4879fa2603fbf0804a80f9f146ef9023dd621f) 
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
96targets       := vmlinux vmlinux.lds \
97		 piggy.$(suffix_y) piggy.$(suffix_y).o \
98		 font.o font.c head.o misc.o $(OBJS)
99
100# Make sure files are removed during clean
101extra-y       += piggy.gzip piggy.lzo piggy.lzma lib1funcs.S
102
103ifeq ($(CONFIG_FUNCTION_TRACER),y)
104ORIG_CFLAGS := $(KBUILD_CFLAGS)
105KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
106endif
107
108ccflags-y := -fpic -fno-builtin
109asflags-y := -Wa,-march=all
110
111# Supply kernel BSS size to the decompressor via a linker symbol.
112KBSS_SZ = $(shell size $(obj)/../../../../vmlinux | awk 'END{print $$3}')
113LDFLAGS_vmlinux = --defsym _kernel_bss_size=$(KBSS_SZ)
114# Supply ZRELADDR to the decompressor via a linker symbol.
115ifneq ($(CONFIG_AUTO_ZRELADDR),y)
116LDFLAGS_vmlinux += --defsym zreladdr=$(ZRELADDR)
117endif
118ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
119LDFLAGS_vmlinux += --be8
120endif
121# ?
122LDFLAGS_vmlinux += -p
123# Report unresolved symbol references
124LDFLAGS_vmlinux += --no-undefined
125# Delete all temporary local symbols
126LDFLAGS_vmlinux += -X
127# Next argument is a linker script
128LDFLAGS_vmlinux += -T
129
130# For __aeabi_uidivmod
131lib1funcs = $(obj)/lib1funcs.o
132
133$(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S FORCE
134	$(call cmd,shipped)
135
136# We need to prevent any GOTOFF relocs being used with references
137# to symbols in the .bss section since we cannot relocate them
138# independently from the rest at run time.  This can be achieved by
139# ensuring that no private .bss symbols exist, as global symbols
140# always have a GOT entry which is what we need.
141# The .data section is already discarded by the linker script so no need
142# to bother about it here.
143check_for_bad_syms = \
144bad_syms=$$($(CROSS_COMPILE)nm $@ | sed -n 's/^.\{8\} [bc] \(.*\)/\1/p') && \
145[ -z "$$bad_syms" ] || \
146  ( echo "following symbols must have non local/private scope:" >&2; \
147    echo "$$bad_syms" >&2; rm -f $@; false )
148
149$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.$(suffix_y).o \
150	 	$(addprefix $(obj)/, $(OBJS)) $(lib1funcs) FORCE
151	$(call if_changed,ld)
152	@$(check_for_bad_syms)
153
154$(obj)/piggy.$(suffix_y): $(obj)/../Image FORCE
155	$(call if_changed,$(suffix_y))
156
157$(obj)/piggy.$(suffix_y).o:  $(obj)/piggy.$(suffix_y) FORCE
158
159CFLAGS_font.o := -Dstatic=
160
161$(obj)/font.c: $(FONTC)
162	$(call cmd,shipped)
163
164$(obj)/vmlinux.lds: $(obj)/vmlinux.lds.in arch/arm/boot/Makefile $(KCONFIG_CONFIG)
165	@sed "$(SEDFLAGS)" < $< > $@
166