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
15include $(srctree)/arch/mips/Kbuild.platforms
16
17# set the default size of the mallocing area for decompressing
18BOOT_HEAP_SIZE := 0x400000
19
20# Disable Function Tracer
21KBUILD_CFLAGS := $(shell echo $(KBUILD_CFLAGS) | sed -e "s/-pg//")
22
23KBUILD_CFLAGS := $(filter-out -fstack-protector, $(KBUILD_CFLAGS))
24
25KBUILD_CFLAGS := $(LINUXINCLUDE) $(KBUILD_CFLAGS) -D__KERNEL__ \
26	-DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) -D"VMLINUX_LOAD_ADDRESS_ULL=$(VMLINUX_LOAD_ADDRESS)ull"
27
28KBUILD_AFLAGS := $(LINUXINCLUDE) $(KBUILD_AFLAGS) -D__ASSEMBLY__ \
29	-DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) \
30	-DKERNEL_ENTRY=$(VMLINUX_ENTRY_ADDRESS)
31
32targets := head.o decompress.o string.o dbg.o uart-16550.o uart-alchemy.o
33
34# decompressor objects (linked with vmlinuz)
35vmlinuzobjs-y := $(obj)/head.o $(obj)/decompress.o $(obj)/string.o
36
37ifdef CONFIG_DEBUG_ZBOOT
38vmlinuzobjs-$(CONFIG_DEBUG_ZBOOT)		   += $(obj)/dbg.o
39vmlinuzobjs-$(CONFIG_SYS_SUPPORTS_ZBOOT_UART16550) += $(obj)/uart-16550.o
40vmlinuzobjs-$(CONFIG_MIPS_ALCHEMY)		   += $(obj)/uart-alchemy.o
41endif
42
43ifdef CONFIG_KERNEL_XZ
44vmlinuzobjs-y += $(obj)/../../lib/ashldi3.o
45endif
46
47targets += vmlinux.bin
48OBJCOPYFLAGS_vmlinux.bin := $(OBJCOPYFLAGS) -O binary -R .comment -S
49$(obj)/vmlinux.bin: $(KBUILD_IMAGE) FORCE
50	$(call if_changed,objcopy)
51
52tool_$(CONFIG_KERNEL_GZIP)    = gzip
53tool_$(CONFIG_KERNEL_BZIP2)   = bzip2
54tool_$(CONFIG_KERNEL_LZ4)     = lz4
55tool_$(CONFIG_KERNEL_LZMA)    = lzma
56tool_$(CONFIG_KERNEL_LZO)     = lzo
57tool_$(CONFIG_KERNEL_XZ)      = xzkern
58
59targets += vmlinux.bin.z
60$(obj)/vmlinux.bin.z: $(obj)/vmlinux.bin FORCE
61	$(call if_changed,$(tool_y))
62
63targets += piggy.o
64OBJCOPYFLAGS_piggy.o := --add-section=.image=$(obj)/vmlinux.bin.z \
65			--set-section-flags=.image=contents,alloc,load,readonly,data
66$(obj)/piggy.o: $(obj)/dummy.o $(obj)/vmlinux.bin.z FORCE
67	$(call if_changed,objcopy)
68
69# Calculate the load address of the compressed kernel image
70hostprogs-y := calc_vmlinuz_load_addr
71
72ifneq ($(zload-y),)
73VMLINUZ_LOAD_ADDRESS := $(zload-y)
74else
75VMLINUZ_LOAD_ADDRESS = $(shell $(obj)/calc_vmlinuz_load_addr \
76		$(obj)/vmlinux.bin $(VMLINUX_LOAD_ADDRESS))
77endif
78
79vmlinuzobjs-y += $(obj)/piggy.o
80
81quiet_cmd_zld = LD	$@
82      cmd_zld = $(LD) $(LDFLAGS) -Ttext $(VMLINUZ_LOAD_ADDRESS) -T $< $(vmlinuzobjs-y) -o $@
83quiet_cmd_strip = STRIP	  $@
84      cmd_strip = $(STRIP) -s $@
85vmlinuz: $(src)/ld.script $(vmlinuzobjs-y) $(obj)/calc_vmlinuz_load_addr
86	$(call cmd,zld)
87	$(call cmd,strip)
88
89#
90# Some DECstations need all possible sections of an ECOFF executable
91#
92ifdef CONFIG_MACH_DECSTATION
93  e2eflag := -a
94endif
95
96# elf2ecoff can only handle 32bit image
97hostprogs-y += ../elf2ecoff
98
99ifdef CONFIG_32BIT
100	VMLINUZ = vmlinuz
101else
102	VMLINUZ = vmlinuz.32
103endif
104
105quiet_cmd_32 = OBJCOPY $@
106      cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
107vmlinuz.32: vmlinuz
108	$(call cmd,32)
109
110quiet_cmd_ecoff = ECOFF	  $@
111      cmd_ecoff = $< $(VMLINUZ) $@ $(e2eflag)
112vmlinuz.ecoff: $(obj)/../elf2ecoff $(VMLINUZ)
113	$(call cmd,ecoff)
114
115OBJCOPYFLAGS_vmlinuz.bin := $(OBJCOPYFLAGS) -O binary
116vmlinuz.bin: vmlinuz
117	$(call cmd,objcopy)
118
119OBJCOPYFLAGS_vmlinuz.srec := $(OBJCOPYFLAGS) -S -O srec
120vmlinuz.srec: vmlinuz
121	$(call cmd,objcopy)
122
123clean-files := $(objtree)/vmlinuz $(objtree)/vmlinuz.{32,ecoff,bin,srec}
124