1# SPDX-License-Identifier: GPL-2.0
2#
3# Author: Huacai Chen <chenhuacai@loongson.cn>
4# Copyright (C) 2020 Loongson Technology Corporation Limited
5
6OBJECT_FILES_NON_STANDARD	:= y
7
8include $(srctree)/arch/loongarch/Kbuild.platforms
9
10# set the default size of the mallocing area for decompressing
11BOOT_HEAP_SIZE := 0x400000
12
13ifdef CONFIG_KASAN
14KASAN_SANITIZE := n
15endif
16
17# Disable Function Tracer
18KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_FTRACE), $(KBUILD_CFLAGS))
19
20KBUILD_CFLAGS := $(filter-out -fstack-protector, $(KBUILD_CFLAGS))
21
22KBUILD_CFLAGS += -fpie -include $(srctree)/include/linux/hidden.h
23
24KBUILD_CFLAGS := $(KBUILD_CFLAGS) -D__KERNEL__ \
25	-DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) \
26	-D"VMLINUX_LOAD_ADDRESS_ULL=$(VMLINUX_LOAD_ADDRESS)ull" \
27	-D"KERNEL_ENTRY=$(VMLINUX_ENTRY_ADDRESS)ull" \
28
29KBUILD_AFLAGS := $(KBUILD_AFLAGS) -D__ASSEMBLY__ \
30	-DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) \
31	-DKERNEL_ENTRY=$(VMLINUX_ENTRY_ADDRESS)
32
33# decompressor objects (linked with vmlinuz)
34vmlinuzobjs-y := $(obj)/head.o $(obj)/decompress.o $(obj)/string.o
35
36ifdef CONFIG_DEBUG_ZBOOT
37vmlinuzobjs-$(CONFIG_DEBUG_ZBOOT)	+= $(obj)/dbg.o
38vmlinuzobjs-$(CONFIG_DEBUG_ZBOOT)	+= $(obj)/uart-16550.o
39endif
40
41vmlinuzobjs-$(CONFIG_KERNEL_XZ) += $(obj)/ashldi3.o
42
43extra-y += ashldi3.c
44$(obj)/ashldi3.c: $(obj)/%.c: $(srctree)/lib/%.c FORCE
45	$(call if_changed,shipped)
46
47targets := $(notdir $(vmlinuzobjs-y))
48
49targets += vmlinux.bin
50OBJCOPYFLAGS_vmlinux.bin := $(OBJCOPYFLAGS) -O binary -R .comment -S
51$(obj)/vmlinux.bin: vmlinux FORCE
52	$(call if_changed,objcopy)
53
54tool_$(CONFIG_KERNEL_GZIP)    = gzip
55tool_$(CONFIG_KERNEL_BZIP2)   = bzip2
56tool_$(CONFIG_KERNEL_LZ4)     = lz4
57tool_$(CONFIG_KERNEL_LZMA)    = lzma
58tool_$(CONFIG_KERNEL_LZO)     = lzo
59tool_$(CONFIG_KERNEL_XZ)      = xzkern
60tool_$(CONFIG_KERNEL_ZSTD)    = zstd22
61
62targets += vmlinux.bin.z
63$(obj)/vmlinux.bin.z: $(obj)/vmlinux.bin FORCE
64	$(call if_changed,$(tool_y))
65
66targets += piggy.o dummy.o
67OBJCOPYFLAGS_piggy.o := --add-section=.image=$(obj)/vmlinux.bin.z \
68			--set-section-flags=.image=contents,alloc,load,readonly,data
69$(obj)/piggy.o: $(obj)/dummy.o $(obj)/vmlinux.bin.z FORCE
70	$(call if_changed,objcopy)
71
72HOSTCFLAGS_calc_vmlinuz_load_addr.o += $(LINUXINCLUDE)
73
74# Calculate the load address of the compressed kernel image
75hostprogs := calc_vmlinuz_load_addr
76
77ifneq ($(zload-y),)
78VMLINUZ_LOAD_ADDRESS := $(zload-y)
79else
80VMLINUZ_LOAD_ADDRESS = $(shell $(obj)/calc_vmlinuz_load_addr \
81		$(obj)/vmlinux.bin $(VMLINUX_LOAD_ADDRESS))
82endif
83UIMAGE_LOADADDR = $(VMLINUZ_LOAD_ADDRESS)
84
85vmlinuzobjs-y += $(obj)/piggy.o
86
87quiet_cmd_zld = LD      $@
88      cmd_zld = $(LD) $(KBUILD_LDFLAGS) -Ttext $(VMLINUZ_LOAD_ADDRESS) -T $< $(vmlinuzobjs-y) -o $@
89quiet_cmd_strip = STRIP	  $@
90      cmd_strip = $(STRIP) -s $@
91vmlinuz: $(src)/ld.script $(vmlinuzobjs-y) $(obj)/calc_vmlinuz_load_addr
92	$(call cmd,zld)
93	$(call cmd,strip)
94
95efiobjs-y := $(obj)/efi-header.o $(obj)/decompress.o $(obj)/piggy.o \
96		$(obj)/string.o $(objtree)/drivers/firmware/efi/libstub/lib.a
97
98efiobjs-$(CONFIG_DEBUG_ZBOOT)	+= $(obj)/dbg.o
99efiobjs-$(CONFIG_DEBUG_ZBOOT)	+= $(obj)/uart-16550.o
100
101targets += $(notdir $(efiobjs-y))
102
103quiet_cmd_efild = LD      $@
104      cmd_efild = $(LD) $(KBUILD_LDFLAGS) -T $< $(efiobjs-y) -o $@
105
106quiet_cmd_eficopy = OBJCOPY $@
107cmd_eficopy = $(OBJCOPY) $(OBJCOPYFLAGS) -O binary -R .comment -S $@ $@
108
109vmlinuz.efi: $(src)/ld.script $(efiobjs-y)
110	$(call cmd,efild)
111	$(call cmd,eficopy)
112
113clean-files += $(objtree)/vmlinuz
114clean-files += $(objtree)/vmlinuz.bin
115clean-files += $(objtree)/vmlinuz.efi
116