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1#
2# This file is subject to the terms and conditions of the GNU General Public
3# License. See the file "COPYING" in the main directory of this archive
4# for more details.
5#
6# Copyright (C) 1994, 95, 96, 2003 by Ralf Baechle
7# DECStation modifications by Paul M. Antoine, 1996
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. Remember to do have actions
12# for "archclean" cleaning up for this architecture.
13#
14
15KBUILD_DEFCONFIG := ip22_defconfig
16
17#
18# Select the object file format to substitute into the linker script.
19#
20ifdef CONFIG_CPU_LITTLE_ENDIAN
2132bit-tool-archpref = mipsel
2264bit-tool-archpref = mips64el
2332bit-bfd = elf32-tradlittlemips
2464bit-bfd = elf64-tradlittlemips
2532bit-emul = elf32ltsmip
2664bit-emul = elf64ltsmip
27else
2832bit-tool-archpref = mips
2964bit-tool-archpref = mips64
3032bit-bfd = elf32-tradbigmips
3164bit-bfd = elf64-tradbigmips
3232bit-emul = elf32btsmip
3364bit-emul = elf64btsmip
34endif
35
36ifdef CONFIG_32BIT
37tool-archpref = $(32bit-tool-archpref)
38UTS_MACHINE := mips
39endif
40ifdef CONFIG_64BIT
41tool-archpref = $(64bit-tool-archpref)
42UTS_MACHINE := mips64
43endif
44
45ifneq ($(SUBARCH),$(ARCH))
46 ifeq ($(CROSS_COMPILE),)
47 CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-)
48 endif
49endif
50
51ifdef CONFIG_FUNCTION_GRAPH_TRACER
52 ifndef KBUILD_MCOUNT_RA_ADDRESS
53 ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
54 cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
55 endif
56 endif
57endif
58cflags-y += $(call cc-option, -mno-check-zero-division)
59
60ifdef CONFIG_32BIT
61ld-emul = $(32bit-emul)
62vmlinux-32 = vmlinux
63vmlinux-64 = vmlinux.64
64
65cflags-y += -mabi=32
66endif
67
68ifdef CONFIG_64BIT
69ld-emul = $(64bit-emul)
70vmlinux-32 = vmlinux.32
71vmlinux-64 = vmlinux
72
73cflags-y += -mabi=64
74endif
75
76all-$(CONFIG_BOOT_ELF32) := $(vmlinux-32)
77all-$(CONFIG_BOOT_ELF64) := $(vmlinux-64)
78all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
79
80#
81# GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel
82# code since it only slows down the whole thing. At some point we might make
83# use of global pointer optimizations but their use of $28 conflicts with
84# the current pointer optimization.
85#
86# The DECStation requires an ECOFF kernel for remote booting, other MIPS
87# machines may also. Since BFD is incredibly buggy with respect to
88# crossformat linking we rely on the elf2ecoff tool for format conversion.
89#
90cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
91cflags-y += -msoft-float
92LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
93KBUILD_AFLAGS_MODULE += -mlong-calls
94KBUILD_CFLAGS_MODULE += -mlong-calls
95
96cflags-y += -ffreestanding
97
98#
99# We explicitly add the endianness specifier if needed, this allows
100# to compile kernels with a toolchain for the other endianness. We
101# carefully avoid to add it redundantly because gcc 3.3/3.4 complains
102# when fed the toolchain default!
103#
104# Certain gcc versions up to gcc 4.1.1 (probably 4.2-subversion as of
105# 2006-10-10 don't properly change the predefined symbols if -EB / -EL
106# are used, so we kludge that here. A bug has been filed at
107# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29413.
108#
109undef-all += -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__
110undef-all += -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__
111predef-be += -DMIPSEB -D_MIPSEB -D__MIPSEB -D__MIPSEB__
112predef-le += -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__
113cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' && echo -EB $(undef-all) $(predef-be))
114cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' || echo -EL $(undef-all) $(predef-le))
115
116cflags-$(CONFIG_CPU_HAS_SMARTMIPS) += $(call cc-option,-msmartmips)
117cflags-$(CONFIG_CPU_MICROMIPS) += $(call cc-option,-mmicromips)
118
119cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
120 -fno-omit-frame-pointer
121
122ifeq ($(CONFIG_CPU_HAS_MSA),y)
123toolchain-msa := $(call cc-option-yn,-mhard-float -mfp64 -mmsa)
124cflags-$(toolchain-msa) += -DTOOLCHAIN_SUPPORTS_MSA
125endif
126
127#
128# CPU-dependent compiler/assembler options for optimization.
129#
130cflags-$(CONFIG_CPU_R3000) += -march=r3000
131cflags-$(CONFIG_CPU_TX39XX) += -march=r3900
132cflags-$(CONFIG_CPU_R6000) += -march=r6000 -Wa,--trap
133cflags-$(CONFIG_CPU_R4300) += -march=r4300 -Wa,--trap
134cflags-$(CONFIG_CPU_VR41XX) += -march=r4100 -Wa,--trap
135cflags-$(CONFIG_CPU_R4X00) += -march=r4600 -Wa,--trap
136cflags-$(CONFIG_CPU_TX49XX) += -march=r4600 -Wa,--trap
137cflags-$(CONFIG_CPU_MIPS32_R1) += $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
138 -Wa,-mips32 -Wa,--trap
139cflags-$(CONFIG_CPU_MIPS32_R2) += $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
140 -Wa,-mips32r2 -Wa,--trap
141cflags-$(CONFIG_CPU_MIPS64_R1) += $(call cc-option,-march=mips64,-mips64 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
142 -Wa,-mips64 -Wa,--trap
143cflags-$(CONFIG_CPU_MIPS64_R2) += $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
144 -Wa,-mips64r2 -Wa,--trap
145cflags-$(CONFIG_CPU_R5000) += -march=r5000 -Wa,--trap
146cflags-$(CONFIG_CPU_R5432) += $(call cc-option,-march=r5400,-march=r5000) \
147 -Wa,--trap
148cflags-$(CONFIG_CPU_R5500) += $(call cc-option,-march=r5500,-march=r5000) \
149 -Wa,--trap
150cflags-$(CONFIG_CPU_NEVADA) += $(call cc-option,-march=rm5200,-march=r5000) \
151 -Wa,--trap
152cflags-$(CONFIG_CPU_RM7000) += $(call cc-option,-march=rm7000,-march=r5000) \
153 -Wa,--trap
154cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-march=sb1 -mno-mdmx -mno-mips3d,-march=r5000) \
155 -Wa,--trap
156cflags-$(CONFIG_CPU_R8000) += -march=r8000 -Wa,--trap
157cflags-$(CONFIG_CPU_R10000) += $(call cc-option,-march=r10000,-march=r8000) \
158 -Wa,--trap
159cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
160ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
161cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
162endif
163cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
164cflags-$(CONFIG_CPU_BMIPS) += -march=mips32 -Wa,-mips32 -Wa,--trap
165
166cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,)
167cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,)
168cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,)
169
170ifdef CONFIG_CPU_SB1
171ifdef CONFIG_SB1_PASS_1_WORKAROUNDS
172KBUILD_AFLAGS_MODULE += -msb1-pass1-workarounds
173KBUILD_CFLAGS_MODULE += -msb1-pass1-workarounds
174endif
175endif
176
177#
178# Firmware support
179#
180libs-$(CONFIG_FW_ARC) += arch/mips/fw/arc
181libs-$(CONFIG_FW_CFE) += arch/mips/fw/cfe/
182libs-$(CONFIG_FW_SNIPROM) += arch/mips/fw/sni/
183libs-y += arch/mips/fw/lib/
184
185#
186# Kernel compression
187#
188ifdef SYS_SUPPORTS_ZBOOT
189COMPRESSION_FNAME = vmlinuz
190else
191COMPRESSION_FNAME = vmlinux
192endif
193
194#
195# Board-dependent options and extra files
196#
197include $(srctree)/arch/mips/Kbuild.platforms
198
199ifdef CONFIG_PHYSICAL_START
200load-y = $(CONFIG_PHYSICAL_START)
201endif
202entry-y = 0x$(shell $(NM) vmlinux 2>/dev/null \
203 | grep "\bkernel_entry\b" | cut -f1 -d \ )
204
205cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic
206drivers-$(CONFIG_PCI) += arch/mips/pci/
207
208#
209# Automatically detect the build format. By default we choose
210# the elf format according to the load address.
211# We can always force a build with a 64-bits symbol format by
212# passing 'KBUILD_SYM32=no' option to the make's command line.
213#
214ifdef CONFIG_64BIT
215 ifndef KBUILD_SYM32
216 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
217 KBUILD_SYM32 = y
218 endif
219 endif
220
221 ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
222 cflags-y += -msym32 -DKBUILD_64BIT_SYM32
223 else
224 ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
225 $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
226 endif
227 endif
228endif
229
230KBUILD_AFLAGS += $(cflags-y)
231KBUILD_CFLAGS += $(cflags-y)
232KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
233KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
234
235bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) \
236 VMLINUX_ENTRY_ADDRESS=$(entry-y)
237
238LDFLAGS += -m $(ld-emul)
239
240ifdef CONFIG_MIPS
241CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
242 egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
243 sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/")
244ifdef CONFIG_64BIT
245CHECKFLAGS += -m64
246endif
247endif
248
249OBJCOPYFLAGS += --remove-section=.reginfo
250
251head-y := arch/mips/kernel/head.o
252
253libs-y += arch/mips/lib/
254
255# See arch/mips/Kbuild for content of core part of the kernel
256core-y += arch/mips/
257
258drivers-$(CONFIG_OPROFILE) += arch/mips/oprofile/
259
260# suspend and hibernation support
261drivers-$(CONFIG_PM) += arch/mips/power/
262
263# boot image targets (arch/mips/boot/)
264boot-y := vmlinux.bin
265boot-y += vmlinux.ecoff
266boot-y += vmlinux.srec
267ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)
268boot-y += uImage
269boot-y += uImage.gz
270endif
271
272# compressed boot image targets (arch/mips/boot/compressed/)
273bootz-y := vmlinuz
274bootz-y += vmlinuz.bin
275bootz-y += vmlinuz.ecoff
276bootz-y += vmlinuz.srec
277
278ifdef CONFIG_LASAT
279rom.bin rom.sw: vmlinux
280 $(Q)$(MAKE) $(build)=arch/mips/lasat/image \
281 $(bootvars-y) $@
282endif
283
284#
285# Some machines like the Indy need 32-bit ELF binaries for booting purposes.
286# Other need ECOFF, so we build a 32-bit ELF binary for them which we then
287# convert to ECOFF using elf2ecoff.
288#
289quiet_cmd_32 = OBJCOPY $@
290 cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
291vmlinux.32: vmlinux
292 $(call cmd,32)
293
294#
295# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
296# ELF files from 32-bit files by conversion.
297#
298quiet_cmd_64 = OBJCOPY $@
299 cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
300vmlinux.64: vmlinux
301 $(call cmd,64)
302
303all: $(all-y)
304
305# boot
306$(boot-y): $(vmlinux-32) FORCE
307 $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
308 $(bootvars-y) arch/mips/boot/$@
309
310ifdef CONFIG_SYS_SUPPORTS_ZBOOT
311# boot/compressed
312$(bootz-y): $(vmlinux-32) FORCE
313 $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
314 $(bootvars-y) 32bit-bfd=$(32bit-bfd) $@
315else
316vmlinuz: FORCE
317 @echo ' CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
318 /bin/false
319endif
320
321
322CLEAN_FILES += vmlinux.32 vmlinux.64
323
324archprepare:
325ifdef CONFIG_MIPS32_N32
326 @echo ' Checking missing-syscalls for N32'
327 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
328endif
329ifdef CONFIG_MIPS32_O32
330 @echo ' Checking missing-syscalls for O32'
331 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
332endif
333
334install:
335 $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
336ifdef CONFIG_SYS_SUPPORTS_ZBOOT
337 $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
338endif
339 $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
340 $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
341
342archclean:
343 $(Q)$(MAKE) $(clean)=arch/mips/boot
344 $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
345 $(Q)$(MAKE) $(clean)=arch/mips/lasat
346
347define archhelp
348 echo ' install - install kernel into $(INSTALL_PATH)'
349 echo ' vmlinux.ecoff - ECOFF boot image'
350 echo ' vmlinux.bin - Raw binary boot image'
351 echo ' vmlinux.srec - SREC boot image'
352 echo ' vmlinuz - Compressed boot(zboot) image'
353 echo ' vmlinuz.ecoff - ECOFF zboot image'
354 echo ' vmlinuz.bin - Raw binary zboot image'
355 echo ' vmlinuz.srec - SREC zboot image'
356 echo ' uImage - U-Boot image'
357 echo ' uImage.gz - U-Boot image (gzip)'
358 echo
359 echo ' These will be default as appropriate for a configured platform.'
360endef
1#
2# This file is subject to the terms and conditions of the GNU General Public
3# License. See the file "COPYING" in the main directory of this archive
4# for more details.
5#
6# Copyright (C) 1994, 95, 96, 2003 by Ralf Baechle
7# DECStation modifications by Paul M. Antoine, 1996
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#
13
14archscripts: scripts_basic
15 $(Q)$(MAKE) $(build)=arch/mips/tools elf-entry
16ifeq ($(CONFIG_CPU_LOONGSON3_WORKAROUNDS),y)
17 $(Q)$(MAKE) $(build)=arch/mips/tools loongson3-llsc-check
18endif
19 $(Q)$(MAKE) $(build)=arch/mips/boot/tools relocs
20
21KBUILD_DEFCONFIG := 32r2el_defconfig
22KBUILD_DTBS := dtbs
23
24#
25# Select the object file format to substitute into the linker script.
26#
27ifdef CONFIG_CPU_LITTLE_ENDIAN
2832bit-tool-archpref = mipsel
2964bit-tool-archpref = mips64el
3032bit-bfd = elf32-tradlittlemips
3164bit-bfd = elf64-tradlittlemips
3232bit-emul = elf32ltsmip
3364bit-emul = elf64ltsmip
34else
3532bit-tool-archpref = mips
3664bit-tool-archpref = mips64
3732bit-bfd = elf32-tradbigmips
3864bit-bfd = elf64-tradbigmips
3932bit-emul = elf32btsmip
4064bit-emul = elf64btsmip
41endif
42
43ifdef CONFIG_32BIT
44tool-archpref = $(32bit-tool-archpref)
45UTS_MACHINE := mips
46endif
47ifdef CONFIG_64BIT
48tool-archpref = $(64bit-tool-archpref)
49UTS_MACHINE := mips64
50endif
51
52ifdef 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-)
55 endif
56endif
57
58ifdef CONFIG_FUNCTION_GRAPH_TRACER
59 ifndef KBUILD_MCOUNT_RA_ADDRESS
60 ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
61 cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
62 endif
63 endif
64endif
65cflags-y += $(call cc-option, -mno-check-zero-division)
66
67ifdef CONFIG_32BIT
68ld-emul = $(32bit-emul)
69vmlinux-32 = vmlinux
70vmlinux-64 = vmlinux.64
71
72cflags-y += -mabi=32
73endif
74
75ifdef CONFIG_64BIT
76ld-emul = $(64bit-emul)
77vmlinux-32 = vmlinux.32
78vmlinux-64 = vmlinux
79
80cflags-y += -mabi=64
81endif
82
83all-$(CONFIG_BOOT_ELF32) := $(vmlinux-32)
84all-$(CONFIG_BOOT_ELF64) := $(vmlinux-64)
85all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
86
87#
88# GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel
89# code since it only slows down the whole thing. At some point we might make
90# use of global pointer optimizations but their use of $28 conflicts with
91# the current pointer optimization.
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#
97cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
98cflags-y += -msoft-float -Wa,-msoft-float
99LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
100KBUILD_AFLAGS_MODULE += -mlong-calls
101KBUILD_CFLAGS_MODULE += -mlong-calls
102
103ifeq ($(CONFIG_RELOCATABLE),y)
104LDFLAGS_vmlinux += --emit-relocs
105endif
106
107cflags-y += -ffreestanding
108
109cflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB
110cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -EL
111
112cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
113 -fno-omit-frame-pointer
114
115# Some distribution-specific toolchains might pass the -fstack-check
116# option during the build, which adds a simple stack-probe at the beginning
117# of every function. This stack probe is to ensure that there is enough
118# stack space, else a SEGV is generated. This is not desirable for MIPS
119# as kernel stacks are small, placed in unmapped virtual memory, and do not
120# grow when overflowed. Especially on SGI IP27 platforms, this check will
121# lead to a NULL pointer dereference in _raw_spin_lock_irq.
122#
123# In disassembly, this stack probe appears at the top of a function as:
124# sd zero,<offset>(sp)
125# Where <offset> is a negative value.
126#
127cflags-y += -fno-stack-check
128
129# binutils from v2.35 when built with --enable-mips-fix-loongson3-llsc=yes,
130# supports an -mfix-loongson3-llsc flag which emits a sync prior to each ll
131# instruction to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h
132# for a description).
133#
134# We disable this in order to prevent the assembler meddling with the
135# instruction that labels refer to, ie. if we label an ll instruction:
136#
137# 1: ll v0, 0(a0)
138#
139# ...then with the assembler fix applied the label may actually point at a sync
140# instruction inserted by the assembler, and if we were using the label in an
141# exception table the table would no longer contain the address of the ll
142# instruction.
143#
144# Avoid this by explicitly disabling that assembler behaviour.
145#
146cflags-y += $(call cc-option,-Wa$(comma)-mno-fix-loongson3-llsc,)
147
148#
149# CPU-dependent compiler/assembler options for optimization.
150#
151cflags-$(CONFIG_CPU_R3000) += -march=r3000
152cflags-$(CONFIG_CPU_R4300) += -march=r4300 -Wa,--trap
153cflags-$(CONFIG_CPU_R4X00) += -march=r4600 -Wa,--trap
154cflags-$(CONFIG_CPU_TX49XX) += -march=r4600 -Wa,--trap
155cflags-$(CONFIG_CPU_MIPS32_R1) += -march=mips32 -Wa,--trap
156cflags-$(CONFIG_CPU_MIPS32_R2) += -march=mips32r2 -Wa,--trap
157cflags-$(CONFIG_CPU_MIPS32_R5) += -march=mips32r5 -Wa,--trap -modd-spreg
158cflags-$(CONFIG_CPU_MIPS32_R6) += -march=mips32r6 -Wa,--trap -modd-spreg
159cflags-$(CONFIG_CPU_MIPS64_R1) += -march=mips64 -Wa,--trap
160cflags-$(CONFIG_CPU_MIPS64_R2) += -march=mips64r2 -Wa,--trap
161cflags-$(CONFIG_CPU_MIPS64_R5) += -march=mips64r5 -Wa,--trap
162cflags-$(CONFIG_CPU_MIPS64_R6) += -march=mips64r6 -Wa,--trap
163cflags-$(CONFIG_CPU_P5600) += -march=p5600 -Wa,--trap -modd-spreg
164cflags-$(CONFIG_CPU_R5000) += -march=r5000 -Wa,--trap
165cflags-$(CONFIG_CPU_R5500) += $(call cc-option,-march=r5500,-march=r5000) \
166 -Wa,--trap
167cflags-$(CONFIG_CPU_NEVADA) += $(call cc-option,-march=rm5200,-march=r5000) \
168 -Wa,--trap
169cflags-$(CONFIG_CPU_RM7000) += $(call cc-option,-march=rm7000,-march=r5000) \
170 -Wa,--trap
171cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-march=sb1,-march=r5000) \
172 -Wa,--trap
173cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mdmx)
174cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mips3d)
175cflags-$(CONFIG_CPU_R10000) += $(call cc-option,-march=r10000,-march=r8000) \
176 -Wa,--trap
177cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
178ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
179cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
180endif
181cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
182cflags-$(CONFIG_CPU_BMIPS) += -march=mips32 -Wa,-mips32 -Wa,--trap
183
184cflags-$(CONFIG_CPU_LOONGSON2E) += -march=loongson2e -Wa,--trap
185cflags-$(CONFIG_CPU_LOONGSON2F) += -march=loongson2f -Wa,--trap
186# Some -march= flags enable MMI instructions, and GCC complains about that
187# support being enabled alongside -msoft-float. Thus explicitly disable MMI.
188cflags-$(CONFIG_CPU_LOONGSON2EF) += $(call cc-option,-mno-loongson-mmi)
189ifdef CONFIG_CPU_LOONGSON64
190cflags-$(CONFIG_CPU_LOONGSON64) += -Wa,--trap
191cflags-$(CONFIG_CC_IS_GCC) += -march=loongson3a
192cflags-$(CONFIG_CC_IS_CLANG) += -march=mips64r2
193endif
194cflags-$(CONFIG_CPU_LOONGSON64) += $(call cc-option,-mno-loongson-mmi)
195
196cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,)
197cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,)
198cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,)
199ifdef CONFIG_CPU_LOONGSON2F_WORKAROUNDS
200cflags-$(CONFIG_CPU_NOP_WORKAROUNDS) += -Wa,-mfix-loongson2f-nop
201cflags-$(CONFIG_CPU_JUMP_WORKAROUNDS) += -Wa,-mfix-loongson2f-jump
202endif
203
204#
205# Some versions of binutils, not currently mainline as of 2019/02/04, support
206# an -mfix-loongson3-llsc flag which emits a sync prior to each ll instruction
207# to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h for a
208# description).
209#
210# We disable this in order to prevent the assembler meddling with the
211# instruction that labels refer to, ie. if we label an ll instruction:
212#
213# 1: ll v0, 0(a0)
214#
215# ...then with the assembler fix applied the label may actually point at a sync
216# instruction inserted by the assembler, and if we were using the label in an
217# exception table the table would no longer contain the address of the ll
218# instruction.
219#
220# Avoid this by explicitly disabling that assembler behaviour. If upstream
221# binutils does not merge support for the flag then we can revisit & remove
222# this later - for now it ensures vendor toolchains don't cause problems.
223#
224cflags-$(CONFIG_CPU_LOONGSON64) += $(call as-option,-Wa$(comma)-mno-fix-loongson3-llsc,)
225
226# For smartmips configurations, there are hundreds of warnings due to ISA overrides
227# in assembly and header files. smartmips is only supported for MIPS32r1 onwards
228# and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
229# similar directives in the kernel will spam the build logs with the following warnings:
230# Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
231# or
232# Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
233# Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
234# been fixed properly.
235mips-cflags := $(cflags-y)
236ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
237smartmips-ase := $(call cc-option-yn,$(mips-cflags) -msmartmips)
238cflags-$(smartmips-ase) += -msmartmips -Wa,--no-warn
239endif
240ifeq ($(CONFIG_CPU_MICROMIPS),y)
241micromips-ase := $(call cc-option-yn,$(mips-cflags) -mmicromips)
242cflags-$(micromips-ase) += -mmicromips
243endif
244ifeq ($(CONFIG_CPU_HAS_MSA),y)
245toolchain-msa := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
246cflags-$(toolchain-msa) += -DTOOLCHAIN_SUPPORTS_MSA
247endif
248toolchain-virt := $(call cc-option-yn,$(mips-cflags) -mvirt)
249cflags-$(toolchain-virt) += -DTOOLCHAIN_SUPPORTS_VIRT
250# For -mmicromips, use -Wa,-fatal-warnings to catch unsupported -mxpa which
251# only warns
252xpa-cflags-y := $(mips-cflags)
253xpa-cflags-$(micromips-ase) += -mmicromips -Wa$(comma)-fatal-warnings
254toolchain-xpa := $(call cc-option-yn,$(xpa-cflags-y) -mxpa)
255cflags-$(toolchain-xpa) += -DTOOLCHAIN_SUPPORTS_XPA
256toolchain-crc := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mcrc)
257cflags-$(toolchain-crc) += -DTOOLCHAIN_SUPPORTS_CRC
258toolchain-dsp := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mdsp)
259cflags-$(toolchain-dsp) += -DTOOLCHAIN_SUPPORTS_DSP
260toolchain-ginv := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mginv)
261cflags-$(toolchain-ginv) += -DTOOLCHAIN_SUPPORTS_GINV
262
263#
264# Firmware support
265#
266libs-$(CONFIG_FW_ARC) += arch/mips/fw/arc
267libs-$(CONFIG_FW_CFE) += arch/mips/fw/cfe/
268libs-$(CONFIG_FW_SNIPROM) += arch/mips/fw/sni/
269libs-y += arch/mips/fw/lib/
270
271#
272# Kernel compression
273#
274ifdef CONFIG_SYS_SUPPORTS_ZBOOT
275COMPRESSION_FNAME = vmlinuz
276else
277COMPRESSION_FNAME = vmlinux
278endif
279
280#
281# Board-dependent options and extra files
282#
283include $(srctree)/arch/mips/Kbuild.platforms
284
285ifdef CONFIG_PHYSICAL_START
286load-y = $(CONFIG_PHYSICAL_START)
287endif
288
289entry-y = $(shell $(objtree)/arch/mips/tools/elf-entry vmlinux)
290cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic
291drivers-$(CONFIG_PCI) += arch/mips/pci/
292
293#
294# Automatically detect the build format. By default we choose
295# the elf format according to the load address.
296# We can always force a build with a 64-bits symbol format by
297# passing 'KBUILD_SYM32=no' option to the make's command line.
298#
299ifdef CONFIG_64BIT
300 ifndef KBUILD_SYM32
301 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
302 KBUILD_SYM32 = y
303 endif
304 endif
305
306 ifeq ($(KBUILD_SYM32), y)
307 cflags-$(KBUILD_SYM32) += -msym32 -DKBUILD_64BIT_SYM32
308 else
309 ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
310 $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
311 endif
312 endif
313endif
314
315# When linking a 32-bit executable the LLVM linker cannot cope with a
316# 32-bit load address that has been sign-extended to 64 bits. Simply
317# remove the upper 32 bits then, as it is safe to do so with other
318# linkers.
319ifdef CONFIG_64BIT
320 load-ld = $(load-y)
321else
322 load-ld = $(subst 0xffffffff,0x,$(load-y))
323endif
324
325KBUILD_AFLAGS += $(cflags-y)
326KBUILD_CFLAGS += $(cflags-y)
327KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) -DLINKER_LOAD_ADDRESS=$(load-ld)
328KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
329
330bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) \
331 LINKER_LOAD_ADDRESS=$(load-ld) \
332 VMLINUX_ENTRY_ADDRESS=$(entry-y) \
333 PLATFORM="$(platform-y)" \
334 ITS_INPUTS="$(its-y)"
335ifdef CONFIG_32BIT
336bootvars-y += ADDR_BITS=32
337endif
338ifdef CONFIG_64BIT
339bootvars-y += ADDR_BITS=64
340endif
341
342# This is required to get dwarf unwinding tables into .debug_frame
343# instead of .eh_frame so we don't discard them.
344KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
345
346KBUILD_LDFLAGS += -m $(ld-emul)
347
348ifdef need-compiler
349CHECKFLAGS += $(shell $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
350 grep -E -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \
351 sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
352endif
353
354OBJCOPYFLAGS += --remove-section=.reginfo
355
356libs-y += arch/mips/lib/
357libs-$(CONFIG_MIPS_FP_SUPPORT) += arch/mips/math-emu/
358
359drivers-y += arch/mips/crypto/
360
361# suspend and hibernation support
362drivers-$(CONFIG_PM) += arch/mips/power/
363
364# boot image targets (arch/mips/boot/)
365boot-y := vmlinux.bin
366boot-y += vmlinux.ecoff
367boot-y += vmlinux.srec
368boot-y += uImage
369boot-y += uImage.bin
370boot-y += uImage.bz2
371boot-y += uImage.gz
372boot-y += uImage.lzma
373boot-y += uImage.lzo
374boot-y += vmlinux.itb
375boot-y += vmlinux.gz.itb
376boot-y += vmlinux.bz2.itb
377boot-y += vmlinux.lzma.itb
378boot-y += vmlinux.lzo.itb
379
380# compressed boot image targets (arch/mips/boot/compressed/)
381bootz-y := vmlinuz
382bootz-y += vmlinuz.bin
383bootz-y += vmlinuz.ecoff
384bootz-y += vmlinuz.srec
385bootz-y += uzImage.bin
386bootz-y += vmlinuz.itb
387
388#
389# Some machines like the Indy need 32-bit ELF binaries for booting purposes.
390# Other need ECOFF, so we build a 32-bit ELF binary for them which we then
391# convert to ECOFF using elf2ecoff.
392#
393quiet_cmd_32 = OBJCOPY $@
394 cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
395vmlinux.32: vmlinux
396 $(call cmd,32)
397
398#
399# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
400# ELF files from 32-bit files by conversion.
401#
402quiet_cmd_64 = OBJCOPY $@
403 cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
404vmlinux.64: vmlinux
405 $(call cmd,64)
406
407all: $(all-y) $(KBUILD_DTBS)
408
409# boot
410$(boot-y): $(vmlinux-32) FORCE
411 $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
412 $(bootvars-y) arch/mips/boot/$@
413
414ifdef CONFIG_SYS_SUPPORTS_ZBOOT
415# boot/compressed
416$(bootz-y): $(vmlinux-32) FORCE
417 $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
418 $(bootvars-y) 32bit-bfd=$(32bit-bfd) arch/mips/boot/$@
419else
420vmlinuz: FORCE
421 @echo ' CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
422 /bin/false
423endif
424
425
426CLEAN_FILES += vmlinux.32 vmlinux.64
427
428# device-trees
429core-y += arch/mips/boot/dts/
430
431archprepare:
432ifdef CONFIG_MIPS32_N32
433 @$(kecho) ' Checking missing-syscalls for N32'
434 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
435endif
436ifdef CONFIG_MIPS32_O32
437 @$(kecho) ' Checking missing-syscalls for O32'
438 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
439endif
440
441install:
442 $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
443ifdef CONFIG_SYS_SUPPORTS_ZBOOT
444 $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
445endif
446 $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
447 $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
448
449archheaders:
450 $(Q)$(MAKE) $(build)=arch/mips/kernel/syscalls all
451
452define archhelp
453 echo ' install - install kernel into $(INSTALL_PATH)'
454 echo ' vmlinux.ecoff - ECOFF boot image'
455 echo ' vmlinux.bin - Raw binary boot image'
456 echo ' vmlinux.srec - SREC boot image'
457 echo ' vmlinux.32 - 64-bit boot image wrapped in 32bits (IP22/IP32)'
458 echo ' vmlinuz - Compressed boot(zboot) image'
459 echo ' vmlinuz.ecoff - ECOFF zboot image'
460 echo ' vmlinuz.bin - Raw binary zboot image'
461 echo ' vmlinuz.srec - SREC zboot image'
462 echo ' uImage - U-Boot image'
463 echo ' uImage.bin - U-Boot image (uncompressed)'
464 echo ' uImage.bz2 - U-Boot image (bz2)'
465 echo ' uImage.gz - U-Boot image (gzip)'
466 echo ' uImage.lzma - U-Boot image (lzma)'
467 echo ' uImage.lzo - U-Boot image (lzo)'
468 echo ' uzImage.bin - U-Boot image (self-extracting)'
469 echo
470 echo ' These will be default as appropriate for a configured platform.'
471 echo
472 echo ' If you are targeting a system supported by generic kernels you may'
473 echo ' configure the kernel for a given architecture target like so:'
474 echo
475 echo ' {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">'
476 echo
477 echo ' Where BOARDS is some subset of the following:'
478 for board in $(sort $(BOARDS)); do echo " $${board}"; done
479 echo
480 echo ' Specifically the following generic default configurations are'
481 echo ' supported:'
482 echo
483 $(foreach cfg,$(generic_defconfigs),
484 printf " %-24s - Build generic kernel for $(call describe_generic_defconfig,$(cfg))\n" $(cfg);)
485 echo
486 echo ' The following legacy default configurations have been converted to'
487 echo ' generic and can still be used:'
488 echo
489 $(foreach cfg,$(sort $(legacy_defconfigs)),
490 printf " %-24s - Build $($(cfg)-y)\n" $(cfg);)
491 echo
492 echo ' Otherwise, the following default configurations are available:'
493endef
494
495generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic
496generic_defconfigs :=
497
498#
499# If the user generates a generic kernel configuration without specifying a
500# list of boards to include the config fragments for, default to including all
501# available board config fragments.
502#
503ifeq ($(BOARDS),)
504BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config)))
505endif
506
507#
508# Generic kernel configurations which merge generic_defconfig with the
509# appropriate config fragments from arch/mips/configs/generic/, resulting in
510# the ability to easily configure the kernel for a given architecture,
511# endianness & set of boards without duplicating the needed configuration in
512# hundreds of defconfig files.
513#
514define gen_generic_defconfigs
515$(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3),
516target := $(bits)$(rev)$(filter el,$(endian))_defconfig
517generic_defconfigs += $$(target)
518$$(target): $(generic_config_dir)/$(bits)$(rev).config
519$$(target): $(generic_config_dir)/$(endian).config
520)))
521endef
522
523$(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el))
524$(eval $(call gen_generic_defconfigs,micro32,r2,eb el))
525
526define describe_generic_defconfig
527$(subst 32r,MIPS32 r,$(subst 64r,MIPS64 r,$(subst el, little endian,$(patsubst %_defconfig,%,$(1)))))
528endef
529
530.PHONY: $(generic_defconfigs)
531$(generic_defconfigs):
532 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
533 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \
534 grep -Ev '^#'
535 $(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@
536 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \
537 KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null
538 $(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \
539 $(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \
540 "$(origin BOARDS)" $(BOARDS)
541 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
542
543#
544# Prevent generic merge_config rules attempting to merge single fragments
545#
546$(generic_config_dir)/%.config: ;
547
548#
549# Prevent direct use of generic_defconfig, which is intended to be used as the
550# basis of the various ISA-specific targets generated above.
551#
552.PHONY: generic_defconfig
553generic_defconfig:
554 $(Q)echo "generic_defconfig is not intended for direct use, but should instead be"
555 $(Q)echo "used via an ISA-specific target from the following list:"
556 $(Q)echo
557 $(Q)for cfg in $(generic_defconfigs); do echo " $${cfg}"; done
558 $(Q)echo
559 $(Q)false
560
561#
562# Legacy defconfig compatibility - these targets used to be real defconfigs but
563# now that the boards have been converted to use the generic kernel they are
564# wrappers around the generic rules above.
565#
566legacy_defconfigs += ocelot_defconfig
567ocelot_defconfig-y := 32r2el_defconfig BOARDS=ocelot
568
569legacy_defconfigs += sead3_defconfig
570sead3_defconfig-y := 32r2el_defconfig BOARDS=sead-3
571
572legacy_defconfigs += sead3micro_defconfig
573sead3micro_defconfig-y := micro32r2el_defconfig BOARDS=sead-3
574
575legacy_defconfigs += xilfpga_defconfig
576xilfpga_defconfig-y := 32r2el_defconfig BOARDS=xilfpga
577
578legacy_defconfigs += pistachio_defconfig
579pistachio_defconfig-y := 32r2el_defconfig BOARDS=marduk
580
581.PHONY: $(legacy_defconfigs)
582$(legacy_defconfigs):
583 $(Q)$(MAKE) -f $(srctree)/Makefile $($@-y)