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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) += $(call cc-option,-msmartmips)
117
118cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
119 -fno-omit-frame-pointer
120
121#
122# CPU-dependent compiler/assembler options for optimization.
123#
124cflags-$(CONFIG_CPU_R3000) += -march=r3000
125cflags-$(CONFIG_CPU_TX39XX) += -march=r3900
126cflags-$(CONFIG_CPU_R6000) += -march=r6000 -Wa,--trap
127cflags-$(CONFIG_CPU_R4300) += -march=r4300 -Wa,--trap
128cflags-$(CONFIG_CPU_VR41XX) += -march=r4100 -Wa,--trap
129cflags-$(CONFIG_CPU_R4X00) += -march=r4600 -Wa,--trap
130cflags-$(CONFIG_CPU_TX49XX) += -march=r4600 -Wa,--trap
131cflags-$(CONFIG_CPU_MIPS32_R1) += $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
132 -Wa,-mips32 -Wa,--trap
133cflags-$(CONFIG_CPU_MIPS32_R2) += $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
134 -Wa,-mips32r2 -Wa,--trap
135cflags-$(CONFIG_CPU_MIPS64_R1) += $(call cc-option,-march=mips64,-mips64 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
136 -Wa,-mips64 -Wa,--trap
137cflags-$(CONFIG_CPU_MIPS64_R2) += $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
138 -Wa,-mips64r2 -Wa,--trap
139cflags-$(CONFIG_CPU_R5000) += -march=r5000 -Wa,--trap
140cflags-$(CONFIG_CPU_R5432) += $(call cc-option,-march=r5400,-march=r5000) \
141 -Wa,--trap
142cflags-$(CONFIG_CPU_R5500) += $(call cc-option,-march=r5500,-march=r5000) \
143 -Wa,--trap
144cflags-$(CONFIG_CPU_NEVADA) += $(call cc-option,-march=rm5200,-march=r5000) \
145 -Wa,--trap
146cflags-$(CONFIG_CPU_RM7000) += $(call cc-option,-march=rm7000,-march=r5000) \
147 -Wa,--trap
148cflags-$(CONFIG_CPU_RM9000) += $(call cc-option,-march=rm9000,-march=r5000) \
149 -Wa,--trap
150cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-march=sb1,-march=r5000) \
151 -Wa,--trap
152cflags-$(CONFIG_CPU_R8000) += -march=r8000 -Wa,--trap
153cflags-$(CONFIG_CPU_R10000) += $(call cc-option,-march=r10000,-march=r8000) \
154 -Wa,--trap
155cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
156ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
157cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
158endif
159cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
160cflags-$(CONFIG_CPU_BMIPS) += -march=mips32 -Wa,-mips32 -Wa,--trap
161
162cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,)
163cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,)
164cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,)
165
166ifdef CONFIG_CPU_SB1
167ifdef CONFIG_SB1_PASS_1_WORKAROUNDS
168KBUILD_AFLAGS_MODULE += -msb1-pass1-workarounds
169KBUILD_CFLAGS_MODULE += -msb1-pass1-workarounds
170endif
171endif
172
173#
174# Firmware support
175#
176libs-$(CONFIG_ARC) += arch/mips/fw/arc
177libs-$(CONFIG_CFE) += arch/mips/fw/cfe/
178libs-$(CONFIG_SNIPROM) += arch/mips/fw/sni/
179libs-y += arch/mips/fw/lib/
180
181#
182# Kernel compression
183#
184ifdef SYS_SUPPORTS_ZBOOT
185COMPRESSION_FNAME = vmlinuz
186else
187COMPRESSION_FNAME = vmlinux
188endif
189
190#
191# Board-dependent options and extra files
192#
193include $(srctree)/arch/mips/Kbuild.platforms
194
195cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic
196drivers-$(CONFIG_PCI) += arch/mips/pci/
197
198#
199# Automatically detect the build format. By default we choose
200# the elf format according to the load address.
201# We can always force a build with a 64-bits symbol format by
202# passing 'KBUILD_SYM32=no' option to the make's command line.
203#
204ifdef CONFIG_64BIT
205 ifndef KBUILD_SYM32
206 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
207 KBUILD_SYM32 = y
208 endif
209 endif
210
211 ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
212 cflags-y += -msym32 -DKBUILD_64BIT_SYM32
213 else
214 ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
215 $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
216 endif
217 endif
218endif
219
220KBUILD_AFLAGS += $(cflags-y)
221KBUILD_CFLAGS += $(cflags-y)
222KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
223KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
224
225LDFLAGS += -m $(ld-emul)
226
227ifdef CONFIG_MIPS
228CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -xc /dev/null | \
229 egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
230 sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/")
231ifdef CONFIG_64BIT
232CHECKFLAGS += -m64
233endif
234endif
235
236OBJCOPYFLAGS += --remove-section=.reginfo
237
238head-y := arch/mips/kernel/head.o
239
240libs-y += arch/mips/lib/
241
242# See arch/mips/Kbuild for content of core part of the kernel
243core-y += arch/mips/
244
245drivers-$(CONFIG_OPROFILE) += arch/mips/oprofile/
246
247# suspend and hibernation support
248drivers-$(CONFIG_PM) += arch/mips/power/
249
250ifdef CONFIG_LASAT
251rom.bin rom.sw: vmlinux
252 $(Q)$(MAKE) $(build)=arch/mips/lasat/image $@
253endif
254
255#
256# Some machines like the Indy need 32-bit ELF binaries for booting purposes.
257# Other need ECOFF, so we build a 32-bit ELF binary for them which we then
258# convert to ECOFF using elf2ecoff.
259#
260vmlinux.32: vmlinux
261 $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
262
263
264#obj-$(CONFIG_KPROBES) += kprobes.o
265
266#
267# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
268# ELF files from 32-bit files by conversion.
269#
270vmlinux.64: vmlinux
271 $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
272
273all: $(all-y)
274
275# boot
276vmlinux.bin vmlinux.ecoff vmlinux.srec: $(vmlinux-32) FORCE
277 $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) arch/mips/boot/$@
278
279# boot/compressed
280vmlinuz vmlinuz.bin vmlinuz.ecoff vmlinuz.srec: $(vmlinux-32) FORCE
281 $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
282 VMLINUX_LOAD_ADDRESS=$(load-y) 32bit-bfd=$(32bit-bfd) $@
283
284
285CLEAN_FILES += vmlinux.32 vmlinux.64
286
287archprepare:
288ifdef CONFIG_MIPS32_N32
289 @echo ' Checking missing-syscalls for N32'
290 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
291endif
292ifdef CONFIG_MIPS32_O32
293 @echo ' Checking missing-syscalls for O32'
294 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
295endif
296
297install:
298 $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
299ifdef CONFIG_SYS_SUPPORTS_ZBOOT
300 $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
301endif
302 $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
303 $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
304
305archclean:
306 $(Q)$(MAKE) $(clean)=arch/mips/boot
307 $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
308 $(Q)$(MAKE) $(clean)=arch/mips/lasat
309
310define archhelp
311 echo ' install - install kernel into $(INSTALL_PATH)'
312 echo ' vmlinux.ecoff - ECOFF boot image'
313 echo ' vmlinux.bin - Raw binary boot image'
314 echo ' vmlinux.srec - SREC boot image'
315 echo ' vmlinuz - Compressed boot(zboot) image'
316 echo ' vmlinuz.ecoff - ECOFF zboot image'
317 echo ' vmlinuz.bin - Raw binary zboot image'
318 echo ' vmlinuz.srec - SREC zboot image'
319 echo
320 echo ' These will be default as appropriate for a configured platform.'
321endef
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) += $(call cc-option,-march=r3000,-march=mips1)
152cflags-$(CONFIG_CPU_R4300) += $(call cc-option,-march=r4300,-march=mips3) -Wa,--trap
153cflags-$(CONFIG_CPU_R4X00) += $(call cc-option,-march=r4600,-march=mips3) -Wa,--trap
154cflags-$(CONFIG_CPU_TX49XX) += $(call cc-option,-march=r4600,-march=mips3) -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) += $(call cc-option,-march=p5600,-march=mips32r5) \
164 -Wa,--trap -modd-spreg
165cflags-$(CONFIG_CPU_R5000) += $(call cc-option,-march=r5000,-march=mips4) \
166 -Wa,--trap
167cflags-$(CONFIG_CPU_R5500) += $(call cc-option,-march=r5500,-march=mips4) \
168 -Wa,--trap
169cflags-$(CONFIG_CPU_NEVADA) += $(call cc-option,-march=rm5200,-march=mips4) \
170 -Wa,--trap
171cflags-$(CONFIG_CPU_RM7000) += $(call cc-option,-march=rm7000,-march=mips4) \
172 -Wa,--trap
173cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-march=sb1,-march=mips64r1) \
174 -Wa,--trap
175cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mdmx)
176cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mips3d)
177cflags-$(CONFIG_CPU_R10000) += $(call cc-option,-march=r10000,-march=mips4) \
178 -Wa,--trap
179cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -march=octeon -Wa,--trap
180cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
181cflags-$(CONFIG_CPU_BMIPS) += -march=mips32 -Wa,--trap
182
183cflags-$(CONFIG_CPU_LOONGSON2E) += \
184 $(call cc-option,-march=loongson2e,-march=mips3) -Wa,--trap
185cflags-$(CONFIG_CPU_LOONGSON2F) += \
186 $(call cc-option,-march=loongson2f,-march=mips3) -Wa,--trap
187# Some -march= flags enable MMI instructions, and GCC complains about that
188# support being enabled alongside -msoft-float. Thus explicitly disable MMI.
189cflags-$(CONFIG_CPU_LOONGSON2EF) += $(call cc-option,-mno-loongson-mmi)
190cflags-$(CONFIG_CPU_LOONGSON64) += \
191 $(call cc-option,-march=loongson3a,-march=mips64r2) -Wa,--trap
192cflags-$(CONFIG_CPU_LOONGSON64) += $(call cc-option,-mno-loongson-mmi)
193
194cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,)
195cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,)
196cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,)
197ifdef CONFIG_CPU_LOONGSON2F_WORKAROUNDS
198cflags-$(CONFIG_CPU_NOP_WORKAROUNDS) += -Wa,-mfix-loongson2f-nop
199cflags-$(CONFIG_CPU_JUMP_WORKAROUNDS) += -Wa,-mfix-loongson2f-jump
200endif
201
202#
203# Some versions of binutils, not currently mainline as of 2019/02/04, support
204# an -mfix-loongson3-llsc flag which emits a sync prior to each ll instruction
205# to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h for a
206# description).
207#
208# We disable this in order to prevent the assembler meddling with the
209# instruction that labels refer to, ie. if we label an ll instruction:
210#
211# 1: ll v0, 0(a0)
212#
213# ...then with the assembler fix applied the label may actually point at a sync
214# instruction inserted by the assembler, and if we were using the label in an
215# exception table the table would no longer contain the address of the ll
216# instruction.
217#
218# Avoid this by explicitly disabling that assembler behaviour. If upstream
219# binutils does not merge support for the flag then we can revisit & remove
220# this later - for now it ensures vendor toolchains don't cause problems.
221#
222cflags-$(CONFIG_CPU_LOONGSON64) += $(call as-option,-Wa$(comma)-mno-fix-loongson3-llsc,)
223
224# For smartmips configurations, there are hundreds of warnings due to ISA overrides
225# in assembly and header files. smartmips is only supported for MIPS32r1 onwards
226# and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
227# similar directives in the kernel will spam the build logs with the following warnings:
228# Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
229# or
230# Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
231# Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
232# been fixed properly.
233mips-cflags := $(cflags-y)
234ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
235smartmips-ase := $(call cc-option-yn,$(mips-cflags) -msmartmips)
236cflags-$(smartmips-ase) += -msmartmips -Wa,--no-warn
237endif
238ifeq ($(CONFIG_CPU_MICROMIPS),y)
239micromips-ase := $(call cc-option-yn,$(mips-cflags) -mmicromips)
240cflags-$(micromips-ase) += -mmicromips
241endif
242ifeq ($(CONFIG_CPU_HAS_MSA),y)
243toolchain-msa := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
244cflags-$(toolchain-msa) += -DTOOLCHAIN_SUPPORTS_MSA
245endif
246toolchain-virt := $(call cc-option-yn,$(mips-cflags) -mvirt)
247cflags-$(toolchain-virt) += -DTOOLCHAIN_SUPPORTS_VIRT
248# For -mmicromips, use -Wa,-fatal-warnings to catch unsupported -mxpa which
249# only warns
250xpa-cflags-y := $(mips-cflags)
251xpa-cflags-$(micromips-ase) += -mmicromips -Wa$(comma)-fatal-warnings
252toolchain-xpa := $(call cc-option-yn,$(xpa-cflags-y) -mxpa)
253cflags-$(toolchain-xpa) += -DTOOLCHAIN_SUPPORTS_XPA
254toolchain-crc := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mcrc)
255cflags-$(toolchain-crc) += -DTOOLCHAIN_SUPPORTS_CRC
256toolchain-dsp := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mdsp)
257cflags-$(toolchain-dsp) += -DTOOLCHAIN_SUPPORTS_DSP
258toolchain-ginv := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mginv)
259cflags-$(toolchain-ginv) += -DTOOLCHAIN_SUPPORTS_GINV
260
261#
262# Firmware support
263#
264libs-$(CONFIG_FW_ARC) += arch/mips/fw/arc
265libs-$(CONFIG_FW_CFE) += arch/mips/fw/cfe/
266libs-$(CONFIG_FW_SNIPROM) += arch/mips/fw/sni/
267libs-y += arch/mips/fw/lib/
268
269#
270# Kernel compression
271#
272ifdef CONFIG_SYS_SUPPORTS_ZBOOT
273COMPRESSION_FNAME = vmlinuz
274else
275COMPRESSION_FNAME = vmlinux
276endif
277
278#
279# Board-dependent options and extra files
280#
281include $(srctree)/arch/mips/Kbuild.platforms
282
283ifdef CONFIG_PHYSICAL_START
284load-y = $(CONFIG_PHYSICAL_START)
285endif
286
287entry-y = $(shell $(objtree)/arch/mips/tools/elf-entry vmlinux)
288cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic
289drivers-$(CONFIG_PCI) += arch/mips/pci/
290
291#
292# Automatically detect the build format. By default we choose
293# the elf format according to the load address.
294# We can always force a build with a 64-bits symbol format by
295# passing 'KBUILD_SYM32=no' option to the make's command line.
296#
297ifdef CONFIG_64BIT
298 ifndef KBUILD_SYM32
299 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
300 KBUILD_SYM32 = $(call cc-option-yn, -msym32)
301 endif
302 endif
303
304 ifeq ($(KBUILD_SYM32), y)
305 cflags-$(KBUILD_SYM32) += -msym32 -DKBUILD_64BIT_SYM32
306 else
307 ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
308 $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
309 endif
310 endif
311endif
312
313# When linking a 32-bit executable the LLVM linker cannot cope with a
314# 32-bit load address that has been sign-extended to 64 bits. Simply
315# remove the upper 32 bits then, as it is safe to do so with other
316# linkers.
317ifdef CONFIG_64BIT
318 load-ld = $(load-y)
319else
320 load-ld = $(subst 0xffffffff,0x,$(load-y))
321endif
322
323KBUILD_AFLAGS += $(cflags-y)
324KBUILD_CFLAGS += $(cflags-y)
325KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) -DLINKER_LOAD_ADDRESS=$(load-ld)
326KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
327
328bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) \
329 LINKER_LOAD_ADDRESS=$(load-ld) \
330 VMLINUX_ENTRY_ADDRESS=$(entry-y) \
331 PLATFORM="$(platform-y)" \
332 ITS_INPUTS="$(its-y)"
333ifdef CONFIG_32BIT
334bootvars-y += ADDR_BITS=32
335endif
336ifdef CONFIG_64BIT
337bootvars-y += ADDR_BITS=64
338endif
339
340# This is required to get dwarf unwinding tables into .debug_frame
341# instead of .eh_frame so we don't discard them.
342KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
343
344KBUILD_LDFLAGS += -m $(ld-emul)
345
346ifdef need-compiler
347CHECKFLAGS += $(shell $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
348 grep -E -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \
349 sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
350endif
351
352OBJCOPYFLAGS += --remove-section=.reginfo
353
354libs-y += arch/mips/lib/
355libs-$(CONFIG_MIPS_FP_SUPPORT) += arch/mips/math-emu/
356
357drivers-y += arch/mips/crypto/
358
359# suspend and hibernation support
360drivers-$(CONFIG_PM) += arch/mips/power/
361
362# boot image targets (arch/mips/boot/)
363boot-y := vmlinux.bin
364boot-y += vmlinux.ecoff
365boot-y += vmlinux.srec
366boot-y += uImage
367boot-y += uImage.bin
368boot-y += uImage.bz2
369boot-y += uImage.gz
370boot-y += uImage.lzma
371boot-y += uImage.lzo
372boot-y += vmlinux.itb
373boot-y += vmlinux.gz.itb
374boot-y += vmlinux.bz2.itb
375boot-y += vmlinux.lzma.itb
376boot-y += vmlinux.lzo.itb
377
378# compressed boot image targets (arch/mips/boot/compressed/)
379bootz-y := vmlinuz
380bootz-y += vmlinuz.bin
381bootz-y += vmlinuz.ecoff
382bootz-y += vmlinuz.srec
383bootz-y += uzImage.bin
384bootz-y += vmlinuz.itb
385
386#
387# Some machines like the Indy need 32-bit ELF binaries for booting purposes.
388# Other need ECOFF, so we build a 32-bit ELF binary for them which we then
389# convert to ECOFF using elf2ecoff.
390#
391quiet_cmd_32 = OBJCOPY $@
392 cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
393vmlinux.32: vmlinux
394 $(call cmd,32)
395
396#
397# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
398# ELF files from 32-bit files by conversion.
399#
400quiet_cmd_64 = OBJCOPY $@
401 cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
402vmlinux.64: vmlinux
403 $(call cmd,64)
404
405all: $(all-y) $(KBUILD_DTBS)
406
407# boot
408$(boot-y): $(vmlinux-32) FORCE
409 $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
410 $(bootvars-y) arch/mips/boot/$@
411
412ifdef CONFIG_SYS_SUPPORTS_ZBOOT
413# boot/compressed
414$(bootz-y): $(vmlinux-32) FORCE
415 $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
416 $(bootvars-y) 32bit-bfd=$(32bit-bfd) arch/mips/boot/$@
417else
418vmlinuz: FORCE
419 @echo ' CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
420 /bin/false
421endif
422
423
424CLEAN_FILES += vmlinux.32 vmlinux.64
425
426# device-trees
427core-y += arch/mips/boot/dts/
428
429archprepare:
430ifdef CONFIG_MIPS32_N32
431 @$(kecho) ' Checking missing-syscalls for N32'
432 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
433endif
434ifdef CONFIG_MIPS32_O32
435 @$(kecho) ' Checking missing-syscalls for O32'
436 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
437endif
438
439install:
440 $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
441ifdef CONFIG_SYS_SUPPORTS_ZBOOT
442 $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
443endif
444 $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
445 $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
446
447archheaders:
448 $(Q)$(MAKE) $(build)=arch/mips/kernel/syscalls all
449
450define archhelp
451 echo ' install - install kernel into $(INSTALL_PATH)'
452 echo ' vmlinux.ecoff - ECOFF boot image'
453 echo ' vmlinux.bin - Raw binary boot image'
454 echo ' vmlinux.srec - SREC boot image'
455 echo ' vmlinux.32 - 64-bit boot image wrapped in 32bits (IP22/IP32)'
456 echo ' vmlinuz - Compressed boot(zboot) image'
457 echo ' vmlinuz.ecoff - ECOFF zboot image'
458 echo ' vmlinuz.bin - Raw binary zboot image'
459 echo ' vmlinuz.srec - SREC zboot image'
460 echo ' uImage - U-Boot image'
461 echo ' uImage.bin - U-Boot image (uncompressed)'
462 echo ' uImage.bz2 - U-Boot image (bz2)'
463 echo ' uImage.gz - U-Boot image (gzip)'
464 echo ' uImage.lzma - U-Boot image (lzma)'
465 echo ' uImage.lzo - U-Boot image (lzo)'
466 echo ' uzImage.bin - U-Boot image (self-extracting)'
467 echo
468 echo ' These will be default as appropriate for a configured platform.'
469 echo
470 echo ' If you are targeting a system supported by generic kernels you may'
471 echo ' configure the kernel for a given architecture target like so:'
472 echo
473 echo ' {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">'
474 echo
475 echo ' Where BOARDS is some subset of the following:'
476 for board in $(sort $(BOARDS)); do echo " $${board}"; done
477 echo
478 echo ' Specifically the following generic default configurations are'
479 echo ' supported:'
480 echo
481 $(foreach cfg,$(generic_defconfigs),
482 printf " %-24s - Build generic kernel for $(call describe_generic_defconfig,$(cfg))\n" $(cfg);)
483 echo
484 echo ' The following legacy default configurations have been converted to'
485 echo ' generic and can still be used:'
486 echo
487 $(foreach cfg,$(sort $(legacy_defconfigs)),
488 printf " %-24s - Build $($(cfg)-y)\n" $(cfg);)
489 echo
490 echo ' Otherwise, the following default configurations are available:'
491endef
492
493generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic
494generic_defconfigs :=
495
496#
497# If the user generates a generic kernel configuration without specifying a
498# list of boards to include the config fragments for, default to including all
499# available board config fragments.
500#
501ifeq ($(BOARDS),)
502BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config)))
503endif
504
505#
506# Generic kernel configurations which merge generic_defconfig with the
507# appropriate config fragments from arch/mips/configs/generic/, resulting in
508# the ability to easily configure the kernel for a given architecture,
509# endianness & set of boards without duplicating the needed configuration in
510# hundreds of defconfig files.
511#
512define gen_generic_defconfigs
513$(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3),
514target := $(bits)$(rev)$(filter el,$(endian))_defconfig
515generic_defconfigs += $$(target)
516$$(target): $(generic_config_dir)/$(bits)$(rev).config
517$$(target): $(generic_config_dir)/$(endian).config
518)))
519endef
520
521$(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el))
522$(eval $(call gen_generic_defconfigs,micro32,r2,eb el))
523
524define describe_generic_defconfig
525$(subst 32r,MIPS32 r,$(subst 64r,MIPS64 r,$(subst el, little endian,$(patsubst %_defconfig,%,$(1)))))
526endef
527
528.PHONY: $(generic_defconfigs)
529$(generic_defconfigs):
530 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
531 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \
532 grep -Ev '^#'
533 $(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@
534 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \
535 KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null
536 $(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \
537 $(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \
538 "$(origin BOARDS)" $(BOARDS)
539 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
540
541#
542# Prevent generic merge_config rules attempting to merge single fragments
543#
544$(generic_config_dir)/%.config: ;
545
546#
547# Prevent direct use of generic_defconfig, which is intended to be used as the
548# basis of the various ISA-specific targets generated above.
549#
550.PHONY: generic_defconfig
551generic_defconfig:
552 $(Q)echo "generic_defconfig is not intended for direct use, but should instead be"
553 $(Q)echo "used via an ISA-specific target from the following list:"
554 $(Q)echo
555 $(Q)for cfg in $(generic_defconfigs); do echo " $${cfg}"; done
556 $(Q)echo
557 $(Q)false
558
559#
560# Legacy defconfig compatibility - these targets used to be real defconfigs but
561# now that the boards have been converted to use the generic kernel they are
562# wrappers around the generic rules above.
563#
564legacy_defconfigs += ocelot_defconfig
565ocelot_defconfig-y := 32r2el_defconfig BOARDS=ocelot
566
567legacy_defconfigs += sead3_defconfig
568sead3_defconfig-y := 32r2el_defconfig BOARDS=sead-3
569
570legacy_defconfigs += sead3micro_defconfig
571sead3micro_defconfig-y := micro32r2el_defconfig BOARDS=sead-3
572
573legacy_defconfigs += xilfpga_defconfig
574xilfpga_defconfig-y := 32r2el_defconfig BOARDS=xilfpga
575
576legacy_defconfigs += pistachio_defconfig
577pistachio_defconfig-y := 32r2el_defconfig BOARDS=marduk
578
579.PHONY: $(legacy_defconfigs)
580$(legacy_defconfigs):
581 $(Q)$(MAKE) -f $(srctree)/Makefile $($@-y)