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 := $(filter-out $(CC_FLAGS_FTRACE), $(KBUILD_CFLAGS))
22
23KBUILD_CFLAGS := $(filter-out -fstack-protector, $(KBUILD_CFLAGS))
24
25# Disable lq/sq in zboot
26ifdef CONFIG_CPU_LOONGSON64
27KBUILD_CFLAGS := $(filter-out -march=loongson3a, $(KBUILD_CFLAGS)) -march=mips64r2
28endif
29
30KBUILD_CFLAGS := $(KBUILD_CFLAGS) -D__KERNEL__ -D__DISABLE_EXPORTS \
31	-DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) -D"VMLINUX_LOAD_ADDRESS_ULL=$(VMLINUX_LOAD_ADDRESS)ull"
32
33KBUILD_AFLAGS := $(KBUILD_AFLAGS) -D__ASSEMBLY__ \
34	-DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) \
35	-DKERNEL_ENTRY=$(VMLINUX_ENTRY_ADDRESS)
36
37# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
38KCOV_INSTRUMENT		:= n
39GCOV_PROFILE := n
40UBSAN_SANITIZE := n
41
42# decompressor objects (linked with vmlinuz)
43vmlinuzobjs-y := $(obj)/head.o $(obj)/decompress.o $(obj)/string.o $(obj)/bswapsi.o
44
45ifdef CONFIG_DEBUG_ZBOOT
46vmlinuzobjs-$(CONFIG_DEBUG_ZBOOT)		   += $(obj)/dbg.o
47vmlinuzobjs-$(CONFIG_SYS_SUPPORTS_ZBOOT_UART16550) += $(obj)/uart-16550.o
48vmlinuzobjs-$(CONFIG_SYS_SUPPORTS_ZBOOT_UART_PROM) += $(obj)/uart-prom.o
49vmlinuzobjs-$(CONFIG_MIPS_ALCHEMY)		   += $(obj)/uart-alchemy.o
50vmlinuzobjs-$(CONFIG_ATH79)			   += $(obj)/uart-ath79.o
51endif
52
53vmlinuzobjs-$(CONFIG_KERNEL_XZ) += $(obj)/ashldi3.o
54
55vmlinuzobjs-$(CONFIG_KERNEL_ZSTD) += $(obj)/bswapdi.o $(obj)/ashldi3.o
56
57targets := $(notdir $(vmlinuzobjs-y))
58
59targets += vmlinux.bin
60
61OBJCOPYFLAGS_vmlinux.bin := $(OBJCOPYFLAGS) -O binary -R .comment -S
62
63$(obj)/vmlinux.bin: $(KBUILD_IMAGE) FORCE
64	$(call if_changed,objcopy)
65
66tool_$(CONFIG_KERNEL_GZIP)    = gzip
67tool_$(CONFIG_KERNEL_BZIP2)   = bzip2
68tool_$(CONFIG_KERNEL_LZ4)     = lz4
69tool_$(CONFIG_KERNEL_LZMA)    = lzma
70tool_$(CONFIG_KERNEL_LZO)     = lzo
71tool_$(CONFIG_KERNEL_XZ)      = xzkern
72tool_$(CONFIG_KERNEL_ZSTD)    = zstd22
73
74targets += vmlinux.bin.z
75
76$(obj)/vmlinux.bin.z: $(obj)/vmlinux.bin FORCE
77	$(call if_changed,$(tool_y))
78
79targets += piggy.o dummy.o
80
81OBJCOPYFLAGS_piggy.o := --add-section=.image=$(obj)/vmlinux.bin.z \
82			--set-section-flags=.image=contents,alloc,load,readonly,data
83
84$(obj)/piggy.o: $(obj)/dummy.o $(obj)/vmlinux.bin.z FORCE
85	$(call if_changed,objcopy)
86
87HOSTCFLAGS_calc_vmlinuz_load_addr.o += $(LINUXINCLUDE)
88
89# Calculate the load address of the compressed kernel image
90hostprogs := calc_vmlinuz_load_addr
91
92ifneq ($(zload-y),)
93VMLINUZ_LOAD_ADDRESS := $(zload-y)
94else
95VMLINUZ_LOAD_ADDRESS = $(shell $(obj)/calc_vmlinuz_load_addr \
96		$(obj)/vmlinux.bin $(LINKER_LOAD_ADDRESS))
97endif
98UIMAGE_LOADADDR = $(VMLINUZ_LOAD_ADDRESS)
99
100vmlinuzobjs-y += $(obj)/piggy.o
101
102targets += ../../../../vmlinuz
103
104quiet_cmd_zld = LD      $@
105      cmd_zld = $(LD) $(KBUILD_LDFLAGS) -Ttext $(VMLINUZ_LOAD_ADDRESS) -T $< $(vmlinuzobjs-y) -o $@
106quiet_cmd_strip = STRIP   $@
107      cmd_strip = $(STRIP) -s $@
108
109$(objtree)/vmlinuz: $(src)/ld.script $(vmlinuzobjs-y) $(obj)/calc_vmlinuz_load_addr
110	$(call cmd,zld)
111	$(call cmd,strip)
112
113objboot := $(objtree)/arch/mips/boot
114
115$(objboot)/vmlinuz: $(objtree)/vmlinuz FORCE
116
117#
118# Some DECstations need all possible sections of an ECOFF executable
119#
120ifdef CONFIG_MACH_DECSTATION
121  e2eflag := -a
122endif
123
124# elf2ecoff can only handle 32bit image
125hostprogs += ../elf2ecoff
126
127ifdef CONFIG_32BIT
128	VMLINUZ = $(objtree)/vmlinuz
129else
130	VMLINUZ = $(objboot)/vmlinuz.32
131endif
132
133targets += ../vmlinuz.32
134
135quiet_cmd_32 = OBJCOPY $@
136      cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
137
138$(objboot)/vmlinuz.32: $(objtree)/vmlinuz
139	$(call cmd,32)
140
141targets += ../vmlinuz.ecoff
142
143quiet_cmd_ecoff = ECOFF	  $@
144      cmd_ecoff = $< $(VMLINUZ) $@ $(e2eflag)
145
146$(objboot)/vmlinuz.ecoff: $(objboot)/elf2ecoff $(VMLINUZ)
147	$(call cmd,ecoff)
148
149targets += ../vmlinuz.bin
150
151OBJCOPYFLAGS_vmlinuz.bin := $(OBJCOPYFLAGS) -O binary
152
153$(objboot)/vmlinuz.bin: $(objtree)/vmlinuz
154	$(call cmd,objcopy)
155
156targets += ../vmlinuz.srec
157
158OBJCOPYFLAGS_vmlinuz.srec := $(OBJCOPYFLAGS) -S -O srec
159
160$(objboot)/vmlinuz.srec: $(objtree)/vmlinuz
161	$(call cmd,objcopy)
162
163targets += ../uzImage.bin
164
165$(objboot)/uzImage.bin: $(objboot)/vmlinuz.bin FORCE
166	$(call if_changed,uimage,none)
167
168#
169# Flattened Image Tree (.itb) image
170#
171
172ifeq ($(ADDR_BITS),32)
173itb_addr_cells = 1
174endif
175ifeq ($(ADDR_BITS),64)
176itb_addr_cells = 2
177endif
178
179targets += ../vmlinuz.its.S
180
181quiet_cmd_its_cat = CAT     $@
182      cmd_its_cat = cat $(real-prereqs) >$@
183
184$(objboot)/vmlinuz.its.S: $(addprefix $(srctree)/arch/mips/$(PLATFORM)/,$(ITS_INPUTS)) FORCE
185	$(call if_changed,its_cat)
186
187targets += ../vmlinuz.its
188
189quiet_cmd_cpp_its_S = ITS     $@
190      cmd_cpp_its_S = $(CPP) -P -C -o $@ $< \
191		        -DKERNEL_NAME="\"Linux $(KERNELRELEASE)\"" \
192			-DVMLINUX_BINARY="\"$(2)\"" \
193			-DVMLINUX_COMPRESSION="\"none\"" \
194			-DVMLINUX_LOAD_ADDRESS=$(VMLINUZ_LOAD_ADDRESS) \
195			-DVMLINUX_ENTRY_ADDRESS=$(VMLINUZ_LOAD_ADDRESS) \
196			-DADDR_BITS=$(ADDR_BITS) \
197			-DADDR_CELLS=$(itb_addr_cells)
198
199$(objboot)/vmlinuz.its: $(objboot)/vmlinuz.its.S FORCE
200	$(call if_changed,cpp_its_S,vmlinuz.bin)
201
202targets += ../vmlinuz.itb
203
204quiet_cmd_itb-image = ITB     $@
205      cmd_itb-image = \
206		env PATH="$(objtree)/scripts/dtc:$(PATH)" \
207		$(BASH) $(MKIMAGE) \
208		-D "-I dts -O dtb -p 500 \
209			--include $(objtree)/arch/mips \
210			--warning no-unit_address_vs_reg" \
211		-f $(2) $@
212
213$(objboot)/vmlinuz.itb: $(objboot)/vmlinuz.its $(objboot)/vmlinuz.bin FORCE
214	$(call if_changed,itb-image,$<)
215