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1#
2# This file is subject to the terms and conditions of the GNU General Public
3# License.
4#
5# Adapted for MIPS Pete Popov, Dan Malek
6#
7# Copyright (C) 1994 by Linus Torvalds
8# Adapted for PowerPC by Gary Thomas
9# modified by Cort (cort@cs.nmt.edu)
10#
11# Copyright (C) 2009 Lemote Inc. & DSLab, Lanzhou University
12# Author: Wu Zhangjin <wuzhangjin@gmail.com>
13#
14
15# set the default size of the mallocing area for decompressing
16BOOT_HEAP_SIZE := 0x400000
17
18# Disable Function Tracer
19KBUILD_CFLAGS := $(shell echo $(KBUILD_CFLAGS) | sed -e "s/-pg//")
20
21KBUILD_CFLAGS := $(filter-out -fstack-protector, $(KBUILD_CFLAGS))
22
23KBUILD_CFLAGS := $(LINUXINCLUDE) $(KBUILD_CFLAGS) -D__KERNEL__ \
24	-DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) -D"VMLINUX_LOAD_ADDRESS_ULL=$(VMLINUX_LOAD_ADDRESS)ull"
25
26KBUILD_AFLAGS := $(LINUXINCLUDE) $(KBUILD_AFLAGS) -D__ASSEMBLY__ \
27	-DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) \
28	-DKERNEL_ENTRY=$(VMLINUX_ENTRY_ADDRESS)
29
30targets := head.o decompress.o string.o dbg.o uart-16550.o uart-alchemy.o
31
32# decompressor objects (linked with vmlinuz)
33vmlinuzobjs-y := $(obj)/head.o $(obj)/decompress.o $(obj)/string.o
34
35ifdef CONFIG_DEBUG_ZBOOT
36vmlinuzobjs-$(CONFIG_DEBUG_ZBOOT)		   += $(obj)/dbg.o
37vmlinuzobjs-$(CONFIG_SYS_SUPPORTS_ZBOOT_UART16550) += $(obj)/uart-16550.o
38vmlinuzobjs-$(CONFIG_MIPS_ALCHEMY)		   += $(obj)/uart-alchemy.o
39endif
40
41ifdef CONFIG_KERNEL_XZ
42vmlinuzobjs-y += $(obj)/../../lib/ashldi3.o
43endif
44
45targets += vmlinux.bin
46OBJCOPYFLAGS_vmlinux.bin := $(OBJCOPYFLAGS) -O binary -R .comment -S
47$(obj)/vmlinux.bin: $(KBUILD_IMAGE) FORCE
48	$(call if_changed,objcopy)
49
50tool_$(CONFIG_KERNEL_GZIP)    = gzip
51tool_$(CONFIG_KERNEL_BZIP2)   = bzip2
52tool_$(CONFIG_KERNEL_LZ4)     = lz4
53tool_$(CONFIG_KERNEL_LZMA)    = lzma
54tool_$(CONFIG_KERNEL_LZO)     = lzo
55tool_$(CONFIG_KERNEL_XZ)      = xzkern
56
57targets += vmlinux.bin.z
58$(obj)/vmlinux.bin.z: $(obj)/vmlinux.bin FORCE
59	$(call if_changed,$(tool_y))
60
61targets += piggy.o
62OBJCOPYFLAGS_piggy.o := --add-section=.image=$(obj)/vmlinux.bin.z \
63			--set-section-flags=.image=contents,alloc,load,readonly,data
64$(obj)/piggy.o: $(obj)/dummy.o $(obj)/vmlinux.bin.z FORCE
65	$(call if_changed,objcopy)
66
67# Calculate the load address of the compressed kernel image
68hostprogs-y := calc_vmlinuz_load_addr
69
70ifeq ($(CONFIG_MACH_JZ4740),y)
71VMLINUZ_LOAD_ADDRESS := 0x80600000
72else
73VMLINUZ_LOAD_ADDRESS = $(shell $(obj)/calc_vmlinuz_load_addr \
74		$(obj)/vmlinux.bin $(VMLINUX_LOAD_ADDRESS))
75endif
76
77vmlinuzobjs-y += $(obj)/piggy.o
78
79quiet_cmd_zld = LD	$@
80      cmd_zld = $(LD) $(LDFLAGS) -Ttext $(VMLINUZ_LOAD_ADDRESS) -T $< $(vmlinuzobjs-y) -o $@
81quiet_cmd_strip = STRIP	  $@
82      cmd_strip = $(STRIP) -s $@
83vmlinuz: $(src)/ld.script $(vmlinuzobjs-y) $(obj)/calc_vmlinuz_load_addr
84	$(call cmd,zld)
85	$(call cmd,strip)
86
87#
88# Some DECstations need all possible sections of an ECOFF executable
89#
90ifdef CONFIG_MACH_DECSTATION
91  e2eflag := -a
92endif
93
94# elf2ecoff can only handle 32bit image
95hostprogs-y += ../elf2ecoff
96
97ifdef CONFIG_32BIT
98	VMLINUZ = vmlinuz
99else
100	VMLINUZ = vmlinuz.32
101endif
102
103quiet_cmd_32 = OBJCOPY $@
104      cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
105vmlinuz.32: vmlinuz
106	$(call cmd,32)
107
108quiet_cmd_ecoff = ECOFF	  $@
109      cmd_ecoff = $< $(VMLINUZ) $@ $(e2eflag)
110vmlinuz.ecoff: $(obj)/../elf2ecoff $(VMLINUZ)
111	$(call cmd,ecoff)
112
113OBJCOPYFLAGS_vmlinuz.bin := $(OBJCOPYFLAGS) -O binary
114vmlinuz.bin: vmlinuz
115	$(call cmd,objcopy)
116
117OBJCOPYFLAGS_vmlinuz.srec := $(OBJCOPYFLAGS) -S -O srec
118vmlinuz.srec: vmlinuz
119	$(call cmd,objcopy)
120
121clean-files := $(objtree)/vmlinuz $(objtree)/vmlinuz.{32,ecoff,bin,srec}
122