1 # 1 #
2 # arch/arm64/Makefile <<
3 # <<
4 # This file is included by the global makefile <<
5 # architecture-specific flags and dependencies <<
6 # <<
7 # This file is subject to the terms and condit 2 # This file is subject to the terms and conditions of the GNU General Public
8 # License. See the file "COPYING" in the main 3 # License. See the file "COPYING" in the main directory of this archive
9 # for more details. 4 # for more details.
10 # 5 #
11 # Copyright (C) 1995-2001 by Russell King !! 6 # Copyright (C) 1994, 95, 96, 2003 by Ralf Baechle
12 !! 7 # DECStation modifications by Paul M. Antoine, 1996
13 LDFLAGS_vmlinux :=--no-undefined -X --pic-vene !! 8 # Copyright (C) 2002, 2003, 2004 Maciej W. Rozycki
>> 9 #
>> 10 # This file is included by the global makefile so that you can add your own
>> 11 # architecture-specific flags and dependencies.
>> 12 #
14 13
15 ifeq ($(CONFIG_RELOCATABLE), y) !! 14 archscripts: scripts_basic
16 # Pass --no-apply-dynamic-relocs to restore pr !! 15 $(Q)$(MAKE) $(build)=arch/mips/tools elf-entry
17 # for relative relocs, since this leads to bet !! 16 ifeq ($(CONFIG_CPU_LOONGSON3_WORKAROUNDS),y)
18 # with the relocation offsets always being zer !! 17 $(Q)$(MAKE) $(build)=arch/mips/tools loongson3-llsc-check
19 LDFLAGS_vmlinux += -shared -Bsymbolic <<
20 $(call ld-option, --no <<
21 endif 18 endif
>> 19 $(Q)$(MAKE) $(build)=arch/mips/boot/tools relocs
>> 20
>> 21 KBUILD_DEFCONFIG := 32r2el_defconfig
>> 22 KBUILD_DTBS := dtbs
22 23
23 ifeq ($(CONFIG_ARM64_ERRATUM_843419),y) !! 24 #
24 ifeq ($(CONFIG_ARM64_LD_HAS_FIX_ERRATUM_8434 !! 25 # Select the object file format to substitute into the linker script.
25 LDFLAGS_vmlinux += --fix-cortex-a53-843419 !! 26 #
>> 27 ifdef CONFIG_CPU_LITTLE_ENDIAN
>> 28 32bit-tool-archpref = mipsel
>> 29 64bit-tool-archpref = mips64el
>> 30 32bit-bfd = elf32-tradlittlemips
>> 31 64bit-bfd = elf64-tradlittlemips
>> 32 32bit-emul = elf32ltsmip
>> 33 64bit-emul = elf64ltsmip
>> 34 else
>> 35 32bit-tool-archpref = mips
>> 36 64bit-tool-archpref = mips64
>> 37 32bit-bfd = elf32-tradbigmips
>> 38 64bit-bfd = elf64-tradbigmips
>> 39 32bit-emul = elf32btsmip
>> 40 64bit-emul = elf64btsmip
>> 41 endif
>> 42
>> 43 ifdef CONFIG_32BIT
>> 44 tool-archpref = $(32bit-tool-archpref)
>> 45 UTS_MACHINE := mips
>> 46 endif
>> 47 ifdef CONFIG_64BIT
>> 48 tool-archpref = $(64bit-tool-archpref)
>> 49 UTS_MACHINE := mips64
>> 50 endif
>> 51
>> 52 ifdef cross_compiling
>> 53 ifeq ($(CROSS_COMPILE),)
>> 54 CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-)
26 endif 55 endif
27 endif 56 endif
28 57
29 cc_has_k_constraint := $(call try-run,echo !! 58 ifdef CONFIG_FUNCTION_GRAPH_TRACER
30 'int main(void) { !! 59 ifndef KBUILD_MCOUNT_RA_ADDRESS
31 asm volatile("and w0, w0, %w0" !! 60 ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
32 return 0; !! 61 cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
33 }' | $(CC) -S -x c -o "$$TMP" -,,-DCON !! 62 endif
34 <<
35 ifeq ($(CONFIG_BROKEN_GAS_INST),y) <<
36 $(warning Detected assembler with broken .inst <<
37 endif <<
38 <<
39 # The GCC option -ffreestanding is required in <<
40 # ARM/NEON intrinsics in a non C99-compliant e <<
41 CC_FLAGS_FPU := -ffreestanding <<
42 # Enable <arm_neon.h> <<
43 CC_FLAGS_FPU += -isystem $(shell $(CC) -pri <<
44 CC_FLAGS_NO_FPU := -mgeneral-regs-only <<
45 <<
46 KBUILD_CFLAGS += $(CC_FLAGS_NO_FPU) \ <<
47 $(compat_vdso) $(cc_has_k_c <<
48 KBUILD_CFLAGS += $(call cc-disable-warning, <<
49 KBUILD_AFLAGS += $(compat_vdso) <<
50 <<
51 KBUILD_RUSTFLAGS += --target=aarch64-unknown-n <<
52 <<
53 KBUILD_CFLAGS += $(call cc-option,-mabi=lp64 <<
54 KBUILD_AFLAGS += $(call cc-option,-mabi=lp64 <<
55 <<
56 # Avoid generating .eh_frame* sections. <<
57 ifneq ($(CONFIG_UNWIND_TABLES),y) <<
58 KBUILD_CFLAGS += -fno-asynchronous-unwind-ta <<
59 KBUILD_AFLAGS += -fno-asynchronous-unwind-ta <<
60 KBUILD_RUSTFLAGS += -Cforce-unwind-tables=n <<
61 else <<
62 KBUILD_CFLAGS += -fasynchronous-unwind-table <<
63 KBUILD_AFLAGS += -fasynchronous-unwind-table <<
64 KBUILD_RUSTFLAGS += -Cforce-unwind-tables=y -Z <<
65 endif <<
66 <<
67 ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y) <<
68 prepare: stack_protector_prepare <<
69 stack_protector_prepare: prepare0 <<
70 $(eval KBUILD_CFLAGS += -mstack-protec <<
71 -mstack-protec <<
72 -mstack-protec <<
73 awk '{if ($$2 == "TSK_ <<
74 includ <<
75 endif <<
76 <<
77 ifeq ($(CONFIG_ARM64_BTI_KERNEL),y) <<
78 KBUILD_CFLAGS += -mbranch-protection=pac-ret <<
79 KBUILD_RUSTFLAGS += -Zbranch-protection=bti, <<
80 else ifeq ($(CONFIG_ARM64_PTR_AUTH_KERNEL),y) <<
81 KBUILD_RUSTFLAGS += -Zbranch-protection=pac- <<
82 ifeq ($(CONFIG_CC_HAS_BRANCH_PROT_PAC_RET),y <<
83 KBUILD_CFLAGS += -mbranch-protection=pac-r <<
84 else <<
85 KBUILD_CFLAGS += -msign-return-address=non <<
86 endif 63 endif
87 else <<
88 KBUILD_CFLAGS += $(call cc-option,-mbranch-p <<
89 endif 64 endif
>> 65 cflags-y += $(call cc-option, -mno-check-zero-division)
90 66
91 # Tell the assembler to support instructions f !! 67 ifdef CONFIG_32BIT
92 # architecture. !! 68 ld-emul = $(32bit-emul)
93 # !! 69 vmlinux-32 = vmlinux
94 # For non-integrated assemblers we'll pass thi !! 70 vmlinux-64 = vmlinux.64
95 # integrated assemblers we'll define ARM64_ASM !! 71
96 # inline usage. !! 72 cflags-y += -mabi=32
97 # <<
98 # We cannot pass the same arch flag to the com <<
99 # freely generate instructions which are not s <<
100 # versions, which would prevent a single kerne <<
101 # hardware. <<
102 ifeq ($(CONFIG_AS_HAS_ARMV8_5), y) <<
103 asm-arch := armv8.5-a <<
104 else ifeq ($(CONFIG_AS_HAS_ARMV8_4), y) <<
105 asm-arch := armv8.4-a <<
106 else ifeq ($(CONFIG_AS_HAS_ARMV8_3), y) <<
107 asm-arch := armv8.3-a <<
108 else ifeq ($(CONFIG_AS_HAS_ARMV8_2), y) <<
109 asm-arch := armv8.2-a <<
110 endif <<
111 <<
112 ifdef asm-arch <<
113 KBUILD_CFLAGS += -Wa,-march=$(asm-arch) \ <<
114 -DARM64_ASM_ARCH='"$(asm-ar <<
115 endif <<
116 <<
117 ifeq ($(CONFIG_SHADOW_CALL_STACK), y) <<
118 KBUILD_CFLAGS += -ffixed-x18 <<
119 KBUILD_RUSTFLAGS += -Zfixed-x18 <<
120 endif <<
121 <<
122 ifeq ($(CONFIG_CPU_BIG_ENDIAN), y) <<
123 KBUILD_CPPFLAGS += -mbig-endian <<
124 CHECKFLAGS += -D__AARCH64EB__ <<
125 # Prefer the baremetal ELF build target, but n <<
126 # it so fall back to the standard linux versio <<
127 KBUILD_LDFLAGS += -EB $(call ld-option, -maar <<
128 UTS_MACHINE := aarch64_be <<
129 else <<
130 KBUILD_CPPFLAGS += -mlittle-endian <<
131 CHECKFLAGS += -D__AARCH64EL__ <<
132 # Same as above, prefer ELF but fall back to l <<
133 KBUILD_LDFLAGS += -EL $(call ld-option, -maar <<
134 UTS_MACHINE := aarch64 <<
135 endif 73 endif
136 74
137 ifeq ($(CONFIG_LD_IS_LLD), y) !! 75 ifdef CONFIG_64BIT
138 KBUILD_LDFLAGS += -z norelro !! 76 ld-emul = $(64bit-emul)
>> 77 vmlinux-32 = vmlinux.32
>> 78 vmlinux-64 = vmlinux
>> 79
>> 80 cflags-y += -mabi=64
139 endif 81 endif
140 82
141 CHECKFLAGS += -D__aarch64__ !! 83 all-$(CONFIG_BOOT_ELF32) := $(vmlinux-32)
>> 84 all-$(CONFIG_BOOT_ELF64) := $(vmlinux-64)
>> 85 all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
142 86
143 ifeq ($(CONFIG_DYNAMIC_FTRACE_WITH_CALL_OPS),y !! 87 #
144 KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNC !! 88 # GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel
145 CC_FLAGS_FTRACE := -fpatchable-function-entr !! 89 # code since it only slows down the whole thing. At some point we might make
146 else ifeq ($(CONFIG_DYNAMIC_FTRACE_WITH_ARGS), !! 90 # use of global pointer optimizations but their use of $28 conflicts with
147 KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNC !! 91 # the current pointer optimization.
148 CC_FLAGS_FTRACE := -fpatchable-function-entr !! 92 #
>> 93 # The DECStation requires an ECOFF kernel for remote booting, other MIPS
>> 94 # machines may also. Since BFD is incredibly buggy with respect to
>> 95 # crossformat linking we rely on the elf2ecoff tool for format conversion.
>> 96 #
>> 97 cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
>> 98 cflags-y += -msoft-float
>> 99 LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
>> 100 KBUILD_AFLAGS_MODULE += -mlong-calls
>> 101 KBUILD_CFLAGS_MODULE += -mlong-calls
>> 102
>> 103 ifeq ($(CONFIG_RELOCATABLE),y)
>> 104 LDFLAGS_vmlinux += --emit-relocs
149 endif 105 endif
150 106
151 ifeq ($(CONFIG_KASAN_SW_TAGS), y) !! 107 #
152 KASAN_SHADOW_SCALE_SHIFT := 4 !! 108 # pass -msoft-float to GAS if it supports it. However on newer binutils
153 else ifeq ($(CONFIG_KASAN_GENERIC), y) !! 109 # (specifically newer than 2.24.51.20140728) we then also need to explicitly
154 KASAN_SHADOW_SCALE_SHIFT := 3 !! 110 # set ".set hardfloat" in all files which manipulate floating point registers.
>> 111 #
>> 112 ifneq ($(call cc-option,$(cflags-y) -Wa$(comma)-msoft-float,),)
>> 113 cflags-y += -DGAS_HAS_SET_HARDFLOAT -Wa,-msoft-float
155 endif 114 endif
156 115
157 KBUILD_CFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$( !! 116 cflags-y += -ffreestanding
158 KBUILD_CPPFLAGS += -DKASAN_SHADOW_SCALE_SHIFT= <<
159 KBUILD_AFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$( <<
160 117
161 libs-y := arch/arm64/lib/ $(libs-y) !! 118 cflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB
162 libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/ !! 119 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -EL
163 120
164 # Default target when executing plain make !! 121 cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
165 boot := arch/arm64/boot !! 122 -fno-omit-frame-pointer
166 123
167 BOOT_TARGETS := Image vmlinuz.efi image.fit !! 124 # Some distribution-specific toolchains might pass the -fstack-check
>> 125 # option during the build, which adds a simple stack-probe at the beginning
>> 126 # of every function. This stack probe is to ensure that there is enough
>> 127 # stack space, else a SEGV is generated. This is not desirable for MIPS
>> 128 # as kernel stacks are small, placed in unmapped virtual memory, and do not
>> 129 # grow when overflowed. Especially on SGI IP27 platforms, this check will
>> 130 # lead to a NULL pointer dereference in _raw_spin_lock_irq.
>> 131 #
>> 132 # In disassembly, this stack probe appears at the top of a function as:
>> 133 # sd zero,<offset>(sp)
>> 134 # Where <offset> is a negative value.
>> 135 #
>> 136 cflags-y += -fno-stack-check
168 137
169 PHONY += $(BOOT_TARGETS) !! 138 # binutils from v2.35 when built with --enable-mips-fix-loongson3-llsc=yes,
>> 139 # supports an -mfix-loongson3-llsc flag which emits a sync prior to each ll
>> 140 # instruction to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h
>> 141 # for a description).
>> 142 #
>> 143 # We disable this in order to prevent the assembler meddling with the
>> 144 # instruction that labels refer to, ie. if we label an ll instruction:
>> 145 #
>> 146 # 1: ll v0, 0(a0)
>> 147 #
>> 148 # ...then with the assembler fix applied the label may actually point at a sync
>> 149 # instruction inserted by the assembler, and if we were using the label in an
>> 150 # exception table the table would no longer contain the address of the ll
>> 151 # instruction.
>> 152 #
>> 153 # Avoid this by explicitly disabling that assembler behaviour.
>> 154 #
>> 155 cflags-y += $(call cc-option,-Wa$(comma)-mno-fix-loongson3-llsc,)
170 156
171 ifeq ($(CONFIG_EFI_ZBOOT),) !! 157 #
172 KBUILD_IMAGE := $(boot)/Image.gz !! 158 # CPU-dependent compiler/assembler options for optimization.
>> 159 #
>> 160 cflags-$(CONFIG_CPU_R3000) += -march=r3000
>> 161 cflags-$(CONFIG_CPU_R4300) += -march=r4300 -Wa,--trap
>> 162 cflags-$(CONFIG_CPU_R4X00) += -march=r4600 -Wa,--trap
>> 163 cflags-$(CONFIG_CPU_TX49XX) += -march=r4600 -Wa,--trap
>> 164 cflags-$(CONFIG_CPU_MIPS32_R1) += -march=mips32 -Wa,--trap
>> 165 cflags-$(CONFIG_CPU_MIPS32_R2) += -march=mips32r2 -Wa,--trap
>> 166 cflags-$(CONFIG_CPU_MIPS32_R5) += -march=mips32r5 -Wa,--trap -modd-spreg
>> 167 cflags-$(CONFIG_CPU_MIPS32_R6) += -march=mips32r6 -Wa,--trap -modd-spreg
>> 168 cflags-$(CONFIG_CPU_MIPS64_R1) += -march=mips64 -Wa,--trap
>> 169 cflags-$(CONFIG_CPU_MIPS64_R2) += -march=mips64r2 -Wa,--trap
>> 170 cflags-$(CONFIG_CPU_MIPS64_R5) += -march=mips64r5 -Wa,--trap
>> 171 cflags-$(CONFIG_CPU_MIPS64_R6) += -march=mips64r6 -Wa,--trap
>> 172 cflags-$(CONFIG_CPU_P5600) += -march=p5600 -Wa,--trap -modd-spreg
>> 173 cflags-$(CONFIG_CPU_R5000) += -march=r5000 -Wa,--trap
>> 174 cflags-$(CONFIG_CPU_R5500) += $(call cc-option,-march=r5500,-march=r5000) \
>> 175 -Wa,--trap
>> 176 cflags-$(CONFIG_CPU_NEVADA) += $(call cc-option,-march=rm5200,-march=r5000) \
>> 177 -Wa,--trap
>> 178 cflags-$(CONFIG_CPU_RM7000) += $(call cc-option,-march=rm7000,-march=r5000) \
>> 179 -Wa,--trap
>> 180 cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-march=sb1,-march=r5000) \
>> 181 -Wa,--trap
>> 182 cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mdmx)
>> 183 cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mips3d)
>> 184 cflags-$(CONFIG_CPU_R10000) += $(call cc-option,-march=r10000,-march=r8000) \
>> 185 -Wa,--trap
>> 186 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
>> 187 ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
>> 188 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
>> 189 endif
>> 190 cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
>> 191 cflags-$(CONFIG_CPU_BMIPS) += -march=mips32 -Wa,-mips32 -Wa,--trap
>> 192
>> 193 cflags-$(CONFIG_CPU_LOONGSON2E) += $(call cc-option,-march=loongson2e) -Wa,--trap
>> 194 cflags-$(CONFIG_CPU_LOONGSON2F) += $(call cc-option,-march=loongson2f) -Wa,--trap
>> 195 cflags-$(CONFIG_CPU_LOONGSON64) += $(call cc-option,-march=loongson3a,-march=mips64r2) -Wa,--trap
>> 196 # Some -march= flags enable MMI instructions, and GCC complains about that
>> 197 # support being enabled alongside -msoft-float. Thus explicitly disable MMI.
>> 198 cflags-$(CONFIG_CPU_LOONGSON2EF) += $(call cc-option,-mno-loongson-mmi)
>> 199 cflags-$(CONFIG_CPU_LOONGSON64) += $(call cc-option,-mno-loongson-mmi)
>> 200
>> 201 cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,)
>> 202 cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,)
>> 203 cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,)
>> 204 ifdef CONFIG_CPU_LOONGSON2F_WORKAROUNDS
>> 205 cflags-$(CONFIG_CPU_NOP_WORKAROUNDS) += -Wa,-mfix-loongson2f-nop
>> 206 cflags-$(CONFIG_CPU_JUMP_WORKAROUNDS) += -Wa,-mfix-loongson2f-jump
>> 207 endif
>> 208
>> 209 #
>> 210 # Some versions of binutils, not currently mainline as of 2019/02/04, support
>> 211 # an -mfix-loongson3-llsc flag which emits a sync prior to each ll instruction
>> 212 # to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h for a
>> 213 # description).
>> 214 #
>> 215 # We disable this in order to prevent the assembler meddling with the
>> 216 # instruction that labels refer to, ie. if we label an ll instruction:
>> 217 #
>> 218 # 1: ll v0, 0(a0)
>> 219 #
>> 220 # ...then with the assembler fix applied the label may actually point at a sync
>> 221 # instruction inserted by the assembler, and if we were using the label in an
>> 222 # exception table the table would no longer contain the address of the ll
>> 223 # instruction.
>> 224 #
>> 225 # Avoid this by explicitly disabling that assembler behaviour. If upstream
>> 226 # binutils does not merge support for the flag then we can revisit & remove
>> 227 # this later - for now it ensures vendor toolchains don't cause problems.
>> 228 #
>> 229 cflags-$(CONFIG_CPU_LOONGSON64) += $(call as-option,-Wa$(comma)-mno-fix-loongson3-llsc,)
>> 230
>> 231 # For smartmips configurations, there are hundreds of warnings due to ISA overrides
>> 232 # in assembly and header files. smartmips is only supported for MIPS32r1 onwards
>> 233 # and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
>> 234 # similar directives in the kernel will spam the build logs with the following warnings:
>> 235 # Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
>> 236 # or
>> 237 # Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
>> 238 # Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
>> 239 # been fixed properly.
>> 240 mips-cflags := $(cflags-y)
>> 241 ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
>> 242 smartmips-ase := $(call cc-option-yn,$(mips-cflags) -msmartmips)
>> 243 cflags-$(smartmips-ase) += -msmartmips -Wa,--no-warn
>> 244 endif
>> 245 ifeq ($(CONFIG_CPU_MICROMIPS),y)
>> 246 micromips-ase := $(call cc-option-yn,$(mips-cflags) -mmicromips)
>> 247 cflags-$(micromips-ase) += -mmicromips
>> 248 endif
>> 249 ifeq ($(CONFIG_CPU_HAS_MSA),y)
>> 250 toolchain-msa := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
>> 251 cflags-$(toolchain-msa) += -DTOOLCHAIN_SUPPORTS_MSA
>> 252 endif
>> 253 toolchain-virt := $(call cc-option-yn,$(mips-cflags) -mvirt)
>> 254 cflags-$(toolchain-virt) += -DTOOLCHAIN_SUPPORTS_VIRT
>> 255 # For -mmicromips, use -Wa,-fatal-warnings to catch unsupported -mxpa which
>> 256 # only warns
>> 257 xpa-cflags-y := $(mips-cflags)
>> 258 xpa-cflags-$(micromips-ase) += -mmicromips -Wa$(comma)-fatal-warnings
>> 259 toolchain-xpa := $(call cc-option-yn,$(xpa-cflags-y) -mxpa)
>> 260 cflags-$(toolchain-xpa) += -DTOOLCHAIN_SUPPORTS_XPA
>> 261 toolchain-crc := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mcrc)
>> 262 cflags-$(toolchain-crc) += -DTOOLCHAIN_SUPPORTS_CRC
>> 263 toolchain-dsp := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mdsp)
>> 264 cflags-$(toolchain-dsp) += -DTOOLCHAIN_SUPPORTS_DSP
>> 265 toolchain-ginv := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mginv)
>> 266 cflags-$(toolchain-ginv) += -DTOOLCHAIN_SUPPORTS_GINV
>> 267
>> 268 #
>> 269 # Firmware support
>> 270 #
>> 271 libs-$(CONFIG_FW_ARC) += arch/mips/fw/arc/
>> 272 libs-$(CONFIG_FW_CFE) += arch/mips/fw/cfe/
>> 273 libs-$(CONFIG_FW_SNIPROM) += arch/mips/fw/sni/
>> 274 libs-y += arch/mips/fw/lib/
>> 275
>> 276 #
>> 277 # Kernel compression
>> 278 #
>> 279 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
>> 280 COMPRESSION_FNAME = vmlinuz
173 else 281 else
174 KBUILD_IMAGE := $(boot)/vmlinuz.efi !! 282 COMPRESSION_FNAME = vmlinux
175 endif 283 endif
176 284
177 all: $(notdir $(KBUILD_IMAGE)) !! 285 #
>> 286 # Board-dependent options and extra files
>> 287 #
>> 288 include $(srctree)/arch/mips/Kbuild.platforms
178 289
179 image.fit: dtbs !! 290 ifdef CONFIG_PHYSICAL_START
>> 291 load-y = $(CONFIG_PHYSICAL_START)
>> 292 endif
180 293
181 vmlinuz.efi image.fit: Image !! 294 entry-y = $(shell $(objtree)/arch/mips/tools/elf-entry vmlinux)
182 $(BOOT_TARGETS): vmlinux !! 295 cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic
183 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$ !! 296 drivers-$(CONFIG_PCI) += arch/mips/pci/
184 297
185 Image.%: Image !! 298 #
186 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$ !! 299 # Automatically detect the build format. By default we choose
>> 300 # the elf format according to the load address.
>> 301 # We can always force a build with a 64-bits symbol format by
>> 302 # passing 'KBUILD_SYM32=no' option to the make's command line.
>> 303 #
>> 304 ifdef CONFIG_64BIT
>> 305 ifndef KBUILD_SYM32
>> 306 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
>> 307 KBUILD_SYM32 = y
>> 308 endif
>> 309 endif
187 310
188 ifeq ($(CONFIG_COMPRESSED_INSTALL),y) !! 311 ifeq ($(KBUILD_SYM32), y)
189 DEFAULT_KBUILD_IMAGE = $(KBUILD_IMAGE) !! 312 cflags-$(KBUILD_SYM32) += -msym32 -DKBUILD_64BIT_SYM32
>> 313 else
>> 314 ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
>> 315 $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
>> 316 endif
>> 317 endif
>> 318 endif
>> 319
>> 320 # When linking a 32-bit executable the LLVM linker cannot cope with a
>> 321 # 32-bit load address that has been sign-extended to 64 bits. Simply
>> 322 # remove the upper 32 bits then, as it is safe to do so with other
>> 323 # linkers.
>> 324 ifdef CONFIG_64BIT
>> 325 load-ld = $(load-y)
190 else 326 else
191 DEFAULT_KBUILD_IMAGE = $(boot)/Image !! 327 load-ld = $(subst 0xffffffff,0x,$(load-y))
192 endif 328 endif
193 329
194 install: KBUILD_IMAGE := $(DEFAULT_KBUILD_IMAG !! 330 KBUILD_AFLAGS += $(cflags-y)
195 install zinstall: !! 331 KBUILD_CFLAGS += $(cflags-y)
196 $(call cmd,install) !! 332 KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) -DLINKER_LOAD_ADDRESS=$(load-ld)
>> 333 KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
>> 334
>> 335 bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) \
>> 336 LINKER_LOAD_ADDRESS=$(load-ld) \
>> 337 VMLINUX_ENTRY_ADDRESS=$(entry-y) \
>> 338 PLATFORM="$(platform-y)" \
>> 339 ITS_INPUTS="$(its-y)"
>> 340 ifdef CONFIG_32BIT
>> 341 bootvars-y += ADDR_BITS=32
>> 342 endif
>> 343 ifdef CONFIG_64BIT
>> 344 bootvars-y += ADDR_BITS=64
>> 345 endif
>> 346
>> 347 # This is required to get dwarf unwinding tables into .debug_frame
>> 348 # instead of .eh_frame so we don't discard them.
>> 349 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
>> 350
>> 351 KBUILD_LDFLAGS += -m $(ld-emul)
>> 352
>> 353 ifdef need-compiler
>> 354 CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
>> 355 grep -E -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \
>> 356 sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
>> 357 endif
>> 358
>> 359 OBJCOPYFLAGS += --remove-section=.reginfo
>> 360
>> 361 libs-y += arch/mips/lib/
>> 362 libs-$(CONFIG_MIPS_FP_SUPPORT) += arch/mips/math-emu/
>> 363
>> 364 drivers-y += arch/mips/crypto/
>> 365
>> 366 # suspend and hibernation support
>> 367 drivers-$(CONFIG_PM) += arch/mips/power/
>> 368
>> 369 # boot image targets (arch/mips/boot/)
>> 370 boot-y := vmlinux.bin
>> 371 boot-y += vmlinux.ecoff
>> 372 boot-y += vmlinux.srec
>> 373 boot-y += uImage
>> 374 boot-y += uImage.bin
>> 375 boot-y += uImage.bz2
>> 376 boot-y += uImage.gz
>> 377 boot-y += uImage.lzma
>> 378 boot-y += uImage.lzo
>> 379 boot-y += vmlinux.itb
>> 380 boot-y += vmlinux.gz.itb
>> 381 boot-y += vmlinux.bz2.itb
>> 382 boot-y += vmlinux.lzma.itb
>> 383 boot-y += vmlinux.lzo.itb
>> 384
>> 385 # compressed boot image targets (arch/mips/boot/compressed/)
>> 386 bootz-y := vmlinuz
>> 387 bootz-y += vmlinuz.bin
>> 388 bootz-y += vmlinuz.ecoff
>> 389 bootz-y += vmlinuz.srec
>> 390 bootz-y += uzImage.bin
>> 391 bootz-y += vmlinuz.itb
>> 392
>> 393 #
>> 394 # Some machines like the Indy need 32-bit ELF binaries for booting purposes.
>> 395 # Other need ECOFF, so we build a 32-bit ELF binary for them which we then
>> 396 # convert to ECOFF using elf2ecoff.
>> 397 #
>> 398 quiet_cmd_32 = OBJCOPY $@
>> 399 cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
>> 400 vmlinux.32: vmlinux
>> 401 $(call cmd,32)
>> 402
>> 403 #
>> 404 # The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
>> 405 # ELF files from 32-bit files by conversion.
>> 406 #
>> 407 quiet_cmd_64 = OBJCOPY $@
>> 408 cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
>> 409 vmlinux.64: vmlinux
>> 410 $(call cmd,64)
>> 411
>> 412 all: $(all-y) $(KBUILD_DTBS)
>> 413
>> 414 # boot
>> 415 $(boot-y): $(vmlinux-32) FORCE
>> 416 $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
>> 417 $(bootvars-y) arch/mips/boot/$@
>> 418
>> 419 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
>> 420 # boot/compressed
>> 421 $(bootz-y): $(vmlinux-32) FORCE
>> 422 $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
>> 423 $(bootvars-y) 32bit-bfd=$(32bit-bfd) arch/mips/boot/$@
>> 424 else
>> 425 vmlinuz: FORCE
>> 426 @echo ' CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
>> 427 /bin/false
>> 428 endif
>> 429
>> 430
>> 431 CLEAN_FILES += vmlinux.32 vmlinux.64
>> 432
>> 433 # device-trees
>> 434 core-y += arch/mips/boot/dts/
197 435
198 archprepare: 436 archprepare:
199 $(Q)$(MAKE) $(build)=arch/arm64/tools !! 437 ifdef CONFIG_MIPS32_N32
200 ifeq ($(CONFIG_ARM64_ERRATUM_843419),y) !! 438 @$(kecho) ' Checking missing-syscalls for N32'
201 ifneq ($(CONFIG_ARM64_LD_HAS_FIX_ERRATUM_843 !! 439 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
202 @echo "warning: ld does not support -- <<
203 endif <<
204 endif 440 endif
205 ifeq ($(CONFIG_ARM64_USE_LSE_ATOMICS),y) !! 441 ifdef CONFIG_MIPS32_O32
206 ifneq ($(CONFIG_ARM64_LSE_ATOMICS),y) !! 442 @$(kecho) ' Checking missing-syscalls for O32'
207 @echo "warning: LSE atomics not suppor !! 443 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
208 endif <<
209 endif 444 endif
210 445
211 ifeq ($(KBUILD_EXTMOD),) !! 446 install:
212 # We need to generate vdso-offsets.h before co !! 447 $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
213 # In order to do that, we should use the archp !! 448 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
214 # asm-offsets.h is included in some files used !! 449 $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
215 # asm-offsets.h is built in prepare0, for whic <<
216 # Therefore we need to generate the header aft <<
217 # this hack. <<
218 prepare: vdso_prepare <<
219 vdso_prepare: prepare0 <<
220 $(Q)$(MAKE) $(build)=arch/arm64/kernel <<
221 include/generated/vdso-offsets.h arch/ <<
222 ifdef CONFIG_COMPAT_VDSO <<
223 $(Q)$(MAKE) $(build)=arch/arm64/kernel <<
224 arch/arm64/kernel/vdso32/vdso.so <<
225 endif <<
226 endif 450 endif
>> 451 $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
>> 452 $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
227 453
228 vdso-install-y += arc !! 454 archheaders:
229 vdso-install-$(CONFIG_COMPAT_VDSO) += arc !! 455 $(Q)$(MAKE) $(build)=arch/mips/kernel/syscalls all
230 <<
231 include $(srctree)/scripts/Makefile.defconf <<
232 <<
233 PHONY += virtconfig <<
234 virtconfig: <<
235 $(call merge_into_defconfig_override,d <<
236 456
237 define archhelp 457 define archhelp
238 echo '* Image.gz - Compressed kernel i !! 458 echo ' install - install kernel into $(INSTALL_PATH)'
239 echo ' Image - Uncompressed kernel !! 459 echo ' vmlinux.ecoff - ECOFF boot image'
240 echo ' image.fit - Flat Image Tree (ar !! 460 echo ' vmlinux.bin - Raw binary boot image'
241 echo ' install - Install kernel (com !! 461 echo ' vmlinux.srec - SREC boot image'
242 echo ' zinstall - Install compressed !! 462 echo ' vmlinux.32 - 64-bit boot image wrapped in 32bits (IP22/IP32)'
243 echo ' Install using (your !! 463 echo ' vmlinuz - Compressed boot(zboot) image'
244 echo ' (distribution) /sbi !! 464 echo ' vmlinuz.ecoff - ECOFF zboot image'
245 echo ' install to $$(INSTA !! 465 echo ' vmlinuz.bin - Raw binary zboot image'
>> 466 echo ' vmlinuz.srec - SREC zboot image'
>> 467 echo ' uImage - U-Boot image'
>> 468 echo ' uImage.bin - U-Boot image (uncompressed)'
>> 469 echo ' uImage.bz2 - U-Boot image (bz2)'
>> 470 echo ' uImage.gz - U-Boot image (gzip)'
>> 471 echo ' uImage.lzma - U-Boot image (lzma)'
>> 472 echo ' uImage.lzo - U-Boot image (lzo)'
>> 473 echo ' uzImage.bin - U-Boot image (self-extracting)'
>> 474 echo
>> 475 echo ' These will be default as appropriate for a configured platform.'
>> 476 echo
>> 477 echo ' If you are targeting a system supported by generic kernels you may'
>> 478 echo ' configure the kernel for a given architecture target like so:'
>> 479 echo
>> 480 echo ' {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">'
>> 481 echo
>> 482 echo ' Where BOARDS is some subset of the following:'
>> 483 for board in $(sort $(BOARDS)); do echo " $${board}"; done
>> 484 echo
>> 485 echo ' Specifically the following generic default configurations are'
>> 486 echo ' supported:'
>> 487 echo
>> 488 $(foreach cfg,$(generic_defconfigs),
>> 489 printf " %-24s - Build generic kernel for $(call describe_generic_defconfig,$(cfg))\n" $(cfg);)
>> 490 echo
>> 491 echo ' The following legacy default configurations have been converted to'
>> 492 echo ' generic and can still be used:'
>> 493 echo
>> 494 $(foreach cfg,$(sort $(legacy_defconfigs)),
>> 495 printf " %-24s - Build $($(cfg)-y)\n" $(cfg);)
>> 496 echo
>> 497 echo ' Otherwise, the following default configurations are available:'
>> 498 endef
>> 499
>> 500 generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic
>> 501 generic_defconfigs :=
>> 502
>> 503 #
>> 504 # If the user generates a generic kernel configuration without specifying a
>> 505 # list of boards to include the config fragments for, default to including all
>> 506 # available board config fragments.
>> 507 #
>> 508 ifeq ($(BOARDS),)
>> 509 BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config)))
>> 510 endif
>> 511
>> 512 #
>> 513 # Generic kernel configurations which merge generic_defconfig with the
>> 514 # appropriate config fragments from arch/mips/configs/generic/, resulting in
>> 515 # the ability to easily configure the kernel for a given architecture,
>> 516 # endianness & set of boards without duplicating the needed configuration in
>> 517 # hundreds of defconfig files.
>> 518 #
>> 519 define gen_generic_defconfigs
>> 520 $(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3),
>> 521 target := $(bits)$(rev)$(filter el,$(endian))_defconfig
>> 522 generic_defconfigs += $$(target)
>> 523 $$(target): $(generic_config_dir)/$(bits)$(rev).config
>> 524 $$(target): $(generic_config_dir)/$(endian).config
>> 525 )))
246 endef 526 endef
>> 527
>> 528 $(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el))
>> 529 $(eval $(call gen_generic_defconfigs,micro32,r2,eb el))
>> 530
>> 531 define describe_generic_defconfig
>> 532 $(subst 32r,MIPS32 r,$(subst 64r,MIPS64 r,$(subst el, little endian,$(patsubst %_defconfig,%,$(1)))))
>> 533 endef
>> 534
>> 535 .PHONY: $(generic_defconfigs)
>> 536 $(generic_defconfigs):
>> 537 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
>> 538 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \
>> 539 grep -Ev '^#'
>> 540 $(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@
>> 541 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \
>> 542 KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null
>> 543 $(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \
>> 544 $(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \
>> 545 "$(origin BOARDS)" $(BOARDS)
>> 546 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
>> 547
>> 548 #
>> 549 # Prevent generic merge_config rules attempting to merge single fragments
>> 550 #
>> 551 $(generic_config_dir)/%.config: ;
>> 552
>> 553 #
>> 554 # Prevent direct use of generic_defconfig, which is intended to be used as the
>> 555 # basis of the various ISA-specific targets generated above.
>> 556 #
>> 557 .PHONY: generic_defconfig
>> 558 generic_defconfig:
>> 559 $(Q)echo "generic_defconfig is not intended for direct use, but should instead be"
>> 560 $(Q)echo "used via an ISA-specific target from the following list:"
>> 561 $(Q)echo
>> 562 $(Q)for cfg in $(generic_defconfigs); do echo " $${cfg}"; done
>> 563 $(Q)echo
>> 564 $(Q)false
>> 565
>> 566 #
>> 567 # Legacy defconfig compatibility - these targets used to be real defconfigs but
>> 568 # now that the boards have been converted to use the generic kernel they are
>> 569 # wrappers around the generic rules above.
>> 570 #
>> 571 legacy_defconfigs += ocelot_defconfig
>> 572 ocelot_defconfig-y := 32r2el_defconfig BOARDS=ocelot
>> 573
>> 574 legacy_defconfigs += sead3_defconfig
>> 575 sead3_defconfig-y := 32r2el_defconfig BOARDS=sead-3
>> 576
>> 577 legacy_defconfigs += sead3micro_defconfig
>> 578 sead3micro_defconfig-y := micro32r2el_defconfig BOARDS=sead-3
>> 579
>> 580 legacy_defconfigs += xilfpga_defconfig
>> 581 xilfpga_defconfig-y := 32r2el_defconfig BOARDS=xilfpga
>> 582
>> 583 legacy_defconfigs += pistachio_defconfig
>> 584 pistachio_defconfig-y := 32r2el_defconfig BOARDS=marduk
>> 585
>> 586 .PHONY: $(legacy_defconfigs)
>> 587 $(legacy_defconfigs):
>> 588 $(Q)$(MAKE) -f $(srctree)/Makefile $($@-y)
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