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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 $28 conflicts with
84# the current pointer optimization.
85#
86# The DECStation requires an ECOFF kernel for remote booting, other MIPS
87# machines may also.  Since BFD is incredibly buggy with respect to
88# crossformat linking we rely on the elf2ecoff tool for format conversion.
89#
90cflags-y			+= -G 0 -mno-abicalls -fno-pic -pipe
91cflags-y			+= -msoft-float -Wa,-msoft-float
92LDFLAGS_vmlinux			+= -G 0 -static -n -nostdlib
93KBUILD_AFLAGS_MODULE		+= -mlong-calls
94KBUILD_CFLAGS_MODULE		+= -mlong-calls
95
96cflags-y += -ffreestanding
97
98#
99# We explicitly add the endianness specifier if needed, this allows
100# to compile kernels with a toolchain for the other endianness. We
101# carefully avoid to add it redundantly because gcc 3.3/3.4 complains
102# when fed the toolchain default!
103#
104# Certain gcc versions up to gcc 4.1.1 (probably 4.2-subversion as of
105# 2006-10-10 don't properly change the predefined symbols if -EB / -EL
106# are used, so we kludge that here.  A bug has been filed at
107# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29413.
108#
109undef-all += -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__
110undef-all += -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__
111predef-be += -DMIPSEB -D_MIPSEB -D__MIPSEB -D__MIPSEB__
112predef-le += -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__
113cflags-$(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 $(srctree)/arch/mips/Kbuild.platforms
194
195#
196# Goldfish
197#
198core-$(CONFIG_MIPS_GOLDFISH)	+= arch/mips/goldfish/
199cflags-$(CONFIG_MIPS_GOLDFISH)	+= -Iarch/mips/include/asm/mach-goldfish -Iarch/mips/goldfish/include
200load-$(CONFIG_MIPS_GOLDFISH)	+= 0xffffffff80010000
201all-$(CONFIG_MIPS_GOLDFISH)	:= vmlinux.bin
202
203cflags-y			+= -I$(srctree)/arch/mips/include/asm/mach-generic
204drivers-$(CONFIG_PCI)		+= arch/mips/pci/
205
206#
207# Automatically detect the build format. By default we choose
208# the elf format according to the load address.
209# We can always force a build with a 64-bits symbol format by
210# passing 'KBUILD_SYM32=no' option to the make's command line.
211#
212ifdef CONFIG_64BIT
213  ifndef KBUILD_SYM32
214    ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
215      KBUILD_SYM32 = y
216    endif
217  endif
218
219  ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
220    cflags-y += -msym32 -DKBUILD_64BIT_SYM32
221  else
222    ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
223      $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
224    endif
225  endif
226endif
227
228KBUILD_AFLAGS	+= $(cflags-y)
229KBUILD_CFLAGS	+= $(cflags-y)
230KBUILD_CPPFLAGS += -D"VMLINUX_LOAD_ADDRESS=$(load-y)"
231KBUILD_CPPFLAGS += -D"DATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)"
232
233LDFLAGS			+= -m $(ld-emul)
234
235ifdef CONFIG_MIPS
236CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
237	egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
238	sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/")
239ifdef CONFIG_64BIT
240CHECKFLAGS		+= -m64
241endif
242endif
243
244OBJCOPYFLAGS		+= --remove-section=.reginfo
245
246head-y := arch/mips/kernel/head.o arch/mips/kernel/init_task.o
247
248libs-y			+= arch/mips/lib/
249
250# See arch/mips/Kbuild for content of core part of the kernel
251core-y += arch/mips/
252
253drivers-$(CONFIG_OPROFILE)	+= arch/mips/oprofile/
254
255# suspend and hibernation support
256drivers-$(CONFIG_PM)	+= arch/mips/power/
257
258ifdef CONFIG_LASAT
259rom.bin rom.sw: vmlinux
260	$(Q)$(MAKE) $(build)=arch/mips/lasat/image $@
261endif
262
263#
264# Some machines like the Indy need 32-bit ELF binaries for booting purposes.
265# Other need ECOFF, so we build a 32-bit ELF binary for them which we then
266# convert to ECOFF using elf2ecoff.
267#
268vmlinux.32: vmlinux
269	$(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
270
271
272#obj-$(CONFIG_KPROBES)		+= kprobes.o
273
274#
275# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
276# ELF files from 32-bit files by conversion.
277#
278vmlinux.64: vmlinux
279	$(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
280
281all:	$(all-y)
282
283# boot
284vmlinux.bin vmlinux.ecoff vmlinux.srec: $(vmlinux-32) FORCE
285	$(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) arch/mips/boot/$@
286
287# boot/compressed
288vmlinuz vmlinuz.bin vmlinuz.ecoff vmlinuz.srec: $(vmlinux-32) FORCE
289	$(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
290	   VMLINUX_LOAD_ADDRESS=$(load-y) 32bit-bfd=$(32bit-bfd) $@
291
292
293CLEAN_FILES += vmlinux.32 vmlinux.64
294
295archprepare:
296ifdef CONFIG_MIPS32_N32
297	@echo '  Checking missing-syscalls for N32'
298	$(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
299endif
300ifdef CONFIG_MIPS32_O32
301	@echo '  Checking missing-syscalls for O32'
302	$(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
303endif
304
305install:
306	$(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
307ifdef CONFIG_SYS_SUPPORTS_ZBOOT
308	$(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
309endif
310	$(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
311	$(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
312
313archclean:
314	$(Q)$(MAKE) $(clean)=arch/mips/boot
315	$(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
316	$(Q)$(MAKE) $(clean)=arch/mips/lasat
317
318define archhelp
319	echo '  install              - install kernel into $(INSTALL_PATH)'
320	echo '  vmlinux.ecoff        - ECOFF boot image'
321	echo '  vmlinux.bin          - Raw binary boot image'
322	echo '  vmlinux.srec         - SREC boot image'
323	echo '  vmlinuz              - Compressed boot(zboot) image'
324	echo '  vmlinuz.ecoff        - ECOFF zboot image'
325	echo '  vmlinuz.bin          - Raw binary zboot image'
326	echo '  vmlinuz.srec         - SREC zboot image'
327	echo
328	echo '  These will be default as appropriate for a configured platform.'
329endef
330