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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
15 KBUILD_DEFCONFIG := ip22_defconfig
16
17 #
18 # Select the object file format to substitute into the linker script.
19 #
20 ifdef CONFIG_CPU_LITTLE_ENDIAN
21 32bit-tool-archpref     = mipsel
22 64bit-tool-archpref     = mips64el
23 32bit-bfd               = elf32-tradlittlemips
24 64bit-bfd               = elf64-tradlittlemips
25 32bit-emul              = elf32ltsmip
26 64bit-emul              = elf64ltsmip
27 else
28 32bit-tool-archpref     = mips
29 64bit-tool-archpref     = mips64
30 32bit-bfd               = elf32-tradbigmips
31 64bit-bfd               = elf64-tradbigmips
32 32bit-emul              = elf32btsmip
33 64bit-emul              = elf64btsmip
34 endif
35
36 ifdef CONFIG_32BIT
37 tool-archpref           = $(32bit-tool-archpref)
38 UTS_MACHINE             := mips
39 endif
40 ifdef CONFIG_64BIT
41 tool-archpref           = $(64bit-tool-archpref)
42 UTS_MACHINE             := mips64
43 endif
44
45 ifneq ($(SUBARCH),$(ARCH))
46   ifeq ($(CROSS_COMPILE),)
47     CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux-  $(tool-archpref)-linux-gnu-  $(tool-archpref)-unknown-linux-gnu-)
48   endif
49 endif
50
51 ifdef CONFIG_FUNCTION_GRAPH_TRACER
52   ifndef KBUILD_MCOUNT_RA_ADDRESS
53     ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
54       cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
55     endif
56   endif
57 endif
58 cflags-y += $(call cc-option, -mno-check-zero-division)
59
60 ifdef CONFIG_32BIT
61 ld-emul                 = $(32bit-emul)
62 vmlinux-32              = vmlinux
63 vmlinux-64              = vmlinux.64
64
65 cflags-y                += -mabi=32
66 endif
67
68 ifdef CONFIG_64BIT
69 ld-emul                 = $(64bit-emul)
70 vmlinux-32              = vmlinux.32
71 vmlinux-64              = vmlinux
72
73 cflags-y                += -mabi=64
74 endif
75
76 all-$(CONFIG_BOOT_ELF32)        := $(vmlinux-32)
77 all-$(CONFIG_BOOT_ELF64)        := $(vmlinux-64)
78 all-$(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 $28 conflicts with
84 # the current pointer optimization.
85 #
86 # The DECStation requires an ECOFF kernel for remote booting, other MIPS
87 # machines may also.  Since BFD is incredibly buggy with respect to
88 # crossformat linking we rely on the elf2ecoff tool for format conversion.
89 #
90 cflags-y                        += -G 0 -mno-abicalls -fno-pic -pipe
91 cflags-y                        += -msoft-float
92 LDFLAGS_vmlinux                 += -G 0 -static -n -nostdlib
93 KBUILD_AFLAGS_MODULE            += -mlong-calls
94 KBUILD_CFLAGS_MODULE            += -mlong-calls
95
96 #
97 # pass -msoft-float to GAS if it supports it.  However on newer binutils
98 # (specifically newer than 2.24.51.20140728) we then also need to explicitly
99 # set ".set hardfloat" in all files which manipulate floating point registers.
100 #
101 ifneq ($(call as-option,-Wa$(comma)-msoft-float,),)
102         cflags-y                += -DGAS_HAS_SET_HARDFLOAT -Wa,-msoft-float
103 endif
104
105 cflags-y += -ffreestanding
106
107 #
108 # We explicitly add the endianness specifier if needed, this allows
109 # to compile kernels with a toolchain for the other endianness. We
110 # carefully avoid to add it redundantly because gcc 3.3/3.4 complains
111 # when fed the toolchain default!
112 #
113 # Certain gcc versions up to gcc 4.1.1 (probably 4.2-subversion as of
114 # 2006-10-10 don't properly change the predefined symbols if -EB / -EL
115 # are used, so we kludge that here.  A bug has been filed at
116 # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29413.
117 #
118 undef-all += -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__
119 undef-all += -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__
120 predef-be += -DMIPSEB -D_MIPSEB -D__MIPSEB -D__MIPSEB__
121 predef-le += -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__
122 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' && echo -EB $(undef-all) $(predef-be))
123 cflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' || echo -EL $(undef-all) $(predef-le))
124
125 cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
126                                    -fno-omit-frame-pointer
127 #
128 # CPU-dependent compiler/assembler options for optimization.
129 #
130 cflags-$(CONFIG_CPU_R3000)      += -march=r3000
131 cflags-$(CONFIG_CPU_TX39XX)     += -march=r3900
132 cflags-$(CONFIG_CPU_R6000)      += -march=r6000 -Wa,--trap
133 cflags-$(CONFIG_CPU_R4300)      += -march=r4300 -Wa,--trap
134 cflags-$(CONFIG_CPU_VR41XX)     += -march=r4100 -Wa,--trap
135 cflags-$(CONFIG_CPU_R4X00)      += -march=r4600 -Wa,--trap
136 cflags-$(CONFIG_CPU_TX49XX)     += -march=r4600 -Wa,--trap
137 cflags-$(CONFIG_CPU_MIPS32_R1)  += $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
138                         -Wa,-mips32 -Wa,--trap
139 cflags-$(CONFIG_CPU_MIPS32_R2)  += $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
140                         -Wa,-mips32r2 -Wa,--trap
141 cflags-$(CONFIG_CPU_MIPS32_R6)  += -march=mips32r6 -Wa,--trap
142 cflags-$(CONFIG_CPU_MIPS64_R1)  += $(call cc-option,-march=mips64,-mips64 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
143                         -Wa,-mips64 -Wa,--trap
144 cflags-$(CONFIG_CPU_MIPS64_R2)  += $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
145                         -Wa,-mips64r2 -Wa,--trap
146 cflags-$(CONFIG_CPU_MIPS64_R6)  += -march=mips64r6 -Wa,--trap
147 cflags-$(CONFIG_CPU_R5000)      += -march=r5000 -Wa,--trap
148 cflags-$(CONFIG_CPU_R5432)      += $(call cc-option,-march=r5400,-march=r5000) \
149                         -Wa,--trap
150 cflags-$(CONFIG_CPU_R5500)      += $(call cc-option,-march=r5500,-march=r5000) \
151                         -Wa,--trap
152 cflags-$(CONFIG_CPU_NEVADA)     += $(call cc-option,-march=rm5200,-march=r5000) \
153                         -Wa,--trap
154 cflags-$(CONFIG_CPU_RM7000)     += $(call cc-option,-march=rm7000,-march=r5000) \
155                         -Wa,--trap
156 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-march=sb1,-march=r5000) \
157                         -Wa,--trap
158 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mdmx)
159 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mips3d)
160 cflags-$(CONFIG_CPU_R8000)      += -march=r8000 -Wa,--trap
161 cflags-$(CONFIG_CPU_R10000)     += $(call cc-option,-march=r10000,-march=r8000) \
162                         -Wa,--trap
163 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
164 ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
165 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
166 endif
167 cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
168 cflags-$(CONFIG_CPU_BMIPS)      += -march=mips32 -Wa,-mips32 -Wa,--trap
169 #
170 # binutils from v2.25 on and gcc starting from v4.9.0 treat -march=loongson3a
171 # as MIPS64 R1; older versions as just R1.  This leaves the possibility open
172 # that GCC might generate R2 code for -march=loongson3a which then is rejected
173 # by GAS.  The cc-option can't probe for this behaviour so -march=loongson3a
174 # can't easily be used safely within the kbuild framework.
175 #
176 cflags-$(CONFIG_CPU_LOONGSON3)  +=                                      \
177         $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
178         -Wa,-mips64r2 -Wa,--trap
179
180 cflags-$(CONFIG_CPU_R4000_WORKAROUNDS)  += $(call cc-option,-mfix-r4000,)
181 cflags-$(CONFIG_CPU_R4400_WORKAROUNDS)  += $(call cc-option,-mfix-r4400,)
182 cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS)  += $(call cc-option,-mno-daddi,)
183
184 ifdef CONFIG_CPU_SB1
185 ifdef CONFIG_SB1_PASS_1_WORKAROUNDS
186 KBUILD_AFLAGS_MODULE += -msb1-pass1-workarounds
187 KBUILD_CFLAGS_MODULE += -msb1-pass1-workarounds
188 endif
189 endif
190
191 # For smartmips configurations, there are hundreds of warnings due to ISA overrides
192 # in assembly and header files. smartmips is only supported for MIPS32r1 onwards
193 # and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
194 # similar directives in the kernel will spam the build logs with the following warnings:
195 # Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
196 # or
197 # Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
198 # Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
199 # been fixed properly.
200 mips-cflags                             := $(cflags-y)
201 ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
202 smartmips-ase                           := $(call cc-option-yn,$(mips-cflags) -msmartmips)
203 cflags-$(smartmips-ase)                 += -msmartmips -Wa,--no-warn
204 endif
205 ifeq ($(CONFIG_CPU_MICROMIPS),y)
206 micromips-ase                           := $(call cc-option-yn,$(mips-cflags) -mmicromips)
207 cflags-$(micromips-ase)                 += -mmicromips
208 endif
209 ifeq ($(CONFIG_CPU_HAS_MSA),y)
210 toolchain-msa                           := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
211 cflags-$(toolchain-msa)                 += -DTOOLCHAIN_SUPPORTS_MSA
212 endif
213
214 #
215 # Firmware support
216 #
217 libs-$(CONFIG_FW_ARC)           += arch/mips/fw/arc/
218 libs-$(CONFIG_FW_CFE)           += arch/mips/fw/cfe/
219 libs-$(CONFIG_FW_SNIPROM)       += arch/mips/fw/sni/
220 libs-y                          += arch/mips/fw/lib/
221
222 #
223 # Kernel compression
224 #
225 ifdef SYS_SUPPORTS_ZBOOT
226 COMPRESSION_FNAME               = vmlinuz
227 else
228 COMPRESSION_FNAME               = vmlinux
229 endif
230
231 #
232 # Board-dependent options and extra files
233 #
234 include arch/mips/Kbuild.platforms
235
236 ifdef CONFIG_PHYSICAL_START
237 load-y                                  = $(CONFIG_PHYSICAL_START)
238 endif
239 entry-y                         = 0x$(shell $(NM) vmlinux 2>/dev/null \
240                                         | grep "\bkernel_entry\b" | cut -f1 -d \ )
241
242 cflags-y                        += -I$(srctree)/arch/mips/include/asm/mach-generic
243 drivers-$(CONFIG_PCI)           += arch/mips/pci/
244
245 #
246 # Automatically detect the build format. By default we choose
247 # the elf format according to the load address.
248 # We can always force a build with a 64-bits symbol format by
249 # passing 'KBUILD_SYM32=no' option to the make's command line.
250 #
251 ifdef CONFIG_64BIT
252   ifndef KBUILD_SYM32
253     ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
254       KBUILD_SYM32 = y
255     endif
256   endif
257
258   ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
259     cflags-y += -msym32 -DKBUILD_64BIT_SYM32
260   else
261     ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
262       $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
263     endif
264   endif
265 endif
266
267 KBUILD_AFLAGS   += $(cflags-y)
268 KBUILD_CFLAGS   += $(cflags-y)
269 KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
270 KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
271
272 bootvars-y      = VMLINUX_LOAD_ADDRESS=$(load-y) \
273                   VMLINUX_ENTRY_ADDRESS=$(entry-y)
274
275 LDFLAGS                 += -m $(ld-emul)
276
277 ifdef CONFIG_MIPS
278 CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
279         egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
280         sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/")
281 ifdef CONFIG_64BIT
282 CHECKFLAGS              += -m64
283 endif
284 endif
285
286 OBJCOPYFLAGS            += --remove-section=.reginfo
287
288 head-y := arch/mips/kernel/head.o
289
290 libs-y                  += arch/mips/lib/
291 libs-y                  += arch/mips/math-emu/
292
293 # See arch/mips/Kbuild for content of core part of the kernel
294 core-y += arch/mips/
295
296 drivers-$(CONFIG_OPROFILE)      += arch/mips/oprofile/
297
298 # suspend and hibernation support
299 drivers-$(CONFIG_PM)    += arch/mips/power/
300
301 # boot image targets (arch/mips/boot/)
302 boot-y                  := vmlinux.bin
303 boot-y                  += vmlinux.ecoff
304 boot-y                  += vmlinux.srec
305 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)
306 boot-y                  += uImage
307 boot-y                  += uImage.bin
308 boot-y                  += uImage.bz2
309 boot-y                  += uImage.gz
310 boot-y                  += uImage.lzma
311 boot-y                  += uImage.lzo
312 endif
313
314 # compressed boot image targets (arch/mips/boot/compressed/)
315 bootz-y                 := vmlinuz
316 bootz-y                 += vmlinuz.bin
317 bootz-y                 += vmlinuz.ecoff
318 bootz-y                 += vmlinuz.srec
319
320 ifdef CONFIG_LASAT
321 rom.bin rom.sw: vmlinux
322         $(Q)$(MAKE) $(build)=arch/mips/lasat/image \
323                 $(bootvars-y) $@
324 endif
325
326 #
327 # Some machines like the Indy need 32-bit ELF binaries for booting purposes.
328 # Other need ECOFF, so we build a 32-bit ELF binary for them which we then
329 # convert to ECOFF using elf2ecoff.
330 #
331 quiet_cmd_32 = OBJCOPY $@
332         cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
333 vmlinux.32: vmlinux
334         $(call cmd,32)
335
336 #
337 # The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
338 # ELF files from 32-bit files by conversion.
339 #
340 quiet_cmd_64 = OBJCOPY $@
341         cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
342 vmlinux.64: vmlinux
343         $(call cmd,64)
344
345 all:    $(all-y)
346
347 # boot
348 $(boot-y): $(vmlinux-32) FORCE
349         $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
350                 $(bootvars-y) arch/mips/boot/$@
351
352 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
353 # boot/compressed
354 $(bootz-y): $(vmlinux-32) FORCE
355         $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
356                 $(bootvars-y) 32bit-bfd=$(32bit-bfd) $@
357 else
358 vmlinuz: FORCE
359         @echo '   CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
360         /bin/false
361 endif
362
363
364 CLEAN_FILES += vmlinux.32 vmlinux.64
365
366 # device-trees
367 core-$(CONFIG_BUILTIN_DTB) += arch/mips/boot/dts/
368
369 %.dtb %.dtb.S %.dtb.o: | scripts
370         $(Q)$(MAKE) $(build)=arch/mips/boot/dts arch/mips/boot/dts/$@
371
372 PHONY += dtbs
373 dtbs: scripts
374         $(Q)$(MAKE) $(build)=arch/mips/boot/dts
375
376 PHONY += dtbs_install
377 dtbs_install:
378         $(Q)$(MAKE) $(dtbinst)=arch/mips/boot/dts
379
380 archprepare:
381 ifdef CONFIG_MIPS32_N32
382         @echo '  Checking missing-syscalls for N32'
383         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
384 endif
385 ifdef CONFIG_MIPS32_O32
386         @echo '  Checking missing-syscalls for O32'
387         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
388 endif
389
390 install:
391         $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
392 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
393         $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
394 endif
395         $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
396         $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
397
398 archclean:
399         $(Q)$(MAKE) $(clean)=arch/mips/boot
400         $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
401         $(Q)$(MAKE) $(clean)=arch/mips/lasat
402
403 define archhelp
404         echo '  install              - install kernel into $(INSTALL_PATH)'
405         echo '  vmlinux.ecoff        - ECOFF boot image'
406         echo '  vmlinux.bin          - Raw binary boot image'
407         echo '  vmlinux.srec         - SREC boot image'
408         echo '  vmlinux.32           - 64-bit boot image wrapped in 32bits (IP22/IP32)'
409         echo '  vmlinuz              - Compressed boot(zboot) image'
410         echo '  vmlinuz.ecoff        - ECOFF zboot image'
411         echo '  vmlinuz.bin          - Raw binary zboot image'
412         echo '  vmlinuz.srec         - SREC zboot image'
413         echo '  uImage               - U-Boot image'
414         echo '  uImage.bin           - U-Boot image (uncompressed)'
415         echo '  uImage.bz2           - U-Boot image (bz2)'
416         echo '  uImage.gz            - U-Boot image (gzip)'
417         echo '  uImage.lzma          - U-Boot image (lzma)'
418         echo '  uImage.lzo           - U-Boot image (lzo)'
419         echo '  dtbs                 - Device-tree blobs for enabled boards'
420         echo '  dtbs_install         - Install dtbs to $(INSTALL_DTBS_PATH)'
421         echo
422         echo '  These will be default as appropriate for a configured platform.'
423 endef