Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
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- $(tool-archpref)-unknown-linux-gnu-)
48 endif
49endif
50
51ifndef CONFIG_FUNCTION_TRACER
52cflags-y := -ffunction-sections
53endif
54ifdef CONFIG_FUNCTION_GRAPH_TRACER
55 ifndef KBUILD_MCOUNT_RA_ADDRESS
56 ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
57 cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
58 endif
59 endif
60endif
61cflags-y += $(call cc-option, -mno-check-zero-division)
62
63ifdef CONFIG_32BIT
64ld-emul = $(32bit-emul)
65vmlinux-32 = vmlinux
66vmlinux-64 = vmlinux.64
67
68cflags-y += -mabi=32
69endif
70
71ifdef CONFIG_64BIT
72ld-emul = $(64bit-emul)
73vmlinux-32 = vmlinux.32
74vmlinux-64 = vmlinux
75
76cflags-y += -mabi=64
77endif
78
79all-$(CONFIG_BOOT_ELF32) := $(vmlinux-32)
80all-$(CONFIG_BOOT_ELF64) := $(vmlinux-64)
81all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
82
83#
84# GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel
85# code since it only slows down the whole thing. At some point we might make
86# use of global pointer optimizations but their use of $28 conflicts with
87# the current pointer optimization.
88#
89# The DECStation requires an ECOFF kernel for remote booting, other MIPS
90# machines may also. Since BFD is incredibly buggy with respect to
91# crossformat linking we rely on the elf2ecoff tool for format conversion.
92#
93cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
94cflags-y += -msoft-float
95LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
96KBUILD_AFLAGS_MODULE += -mlong-calls
97KBUILD_CFLAGS_MODULE += -mlong-calls
98
99cflags-y += -ffreestanding
100
101#
102# We explicitly add the endianness specifier if needed, this allows
103# to compile kernels with a toolchain for the other endianness. We
104# carefully avoid to add it redundantly because gcc 3.3/3.4 complains
105# when fed the toolchain default!
106#
107# Certain gcc versions upto gcc 4.1.1 (probably 4.2-subversion as of
108# 2006-10-10 don't properly change the predefined symbols if -EB / -EL
109# are used, so we kludge that here. A bug has been filed at
110# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29413.
111#
112undef-all += -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__
113undef-all += -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__
114predef-be += -DMIPSEB -D_MIPSEB -D__MIPSEB -D__MIPSEB__
115predef-le += -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__
116cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' && echo -EB $(undef-all) $(predef-be))
117cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' || echo -EL $(undef-all) $(predef-le))
118
119cflags-$(CONFIG_CPU_HAS_SMARTMIPS) += $(call cc-option,-msmartmips)
120
121cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
122 -fno-omit-frame-pointer
123
124#
125# CPU-dependent compiler/assembler options for optimization.
126#
127cflags-$(CONFIG_CPU_R3000) += -march=r3000
128cflags-$(CONFIG_CPU_TX39XX) += -march=r3900
129cflags-$(CONFIG_CPU_R6000) += -march=r6000 -Wa,--trap
130cflags-$(CONFIG_CPU_R4300) += -march=r4300 -Wa,--trap
131cflags-$(CONFIG_CPU_VR41XX) += -march=r4100 -Wa,--trap
132cflags-$(CONFIG_CPU_R4X00) += -march=r4600 -Wa,--trap
133cflags-$(CONFIG_CPU_TX49XX) += -march=r4600 -Wa,--trap
134cflags-$(CONFIG_CPU_MIPS32_R1) += $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
135 -Wa,-mips32 -Wa,--trap
136cflags-$(CONFIG_CPU_MIPS32_R2) += $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
137 -Wa,-mips32r2 -Wa,--trap
138cflags-$(CONFIG_CPU_MIPS64_R1) += $(call cc-option,-march=mips64,-mips64 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
139 -Wa,-mips64 -Wa,--trap
140cflags-$(CONFIG_CPU_MIPS64_R2) += $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
141 -Wa,-mips64r2 -Wa,--trap
142cflags-$(CONFIG_CPU_R5000) += -march=r5000 -Wa,--trap
143cflags-$(CONFIG_CPU_R5432) += $(call cc-option,-march=r5400,-march=r5000) \
144 -Wa,--trap
145cflags-$(CONFIG_CPU_R5500) += $(call cc-option,-march=r5500,-march=r5000) \
146 -Wa,--trap
147cflags-$(CONFIG_CPU_NEVADA) += $(call cc-option,-march=rm5200,-march=r5000) \
148 -Wa,--trap
149cflags-$(CONFIG_CPU_RM7000) += $(call cc-option,-march=rm7000,-march=r5000) \
150 -Wa,--trap
151cflags-$(CONFIG_CPU_RM9000) += $(call cc-option,-march=rm9000,-march=r5000) \
152 -Wa,--trap
153cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-march=sb1,-march=r5000) \
154 -Wa,--trap
155cflags-$(CONFIG_CPU_R8000) += -march=r8000 -Wa,--trap
156cflags-$(CONFIG_CPU_R10000) += $(call cc-option,-march=r10000,-march=r8000) \
157 -Wa,--trap
158cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
159ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
160cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
161endif
162
163cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,)
164cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,)
165cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,)
166
167ifdef CONFIG_CPU_SB1
168ifdef CONFIG_SB1_PASS_1_WORKAROUNDS
169KBUILD_AFLAGS_MODULE += -msb1-pass1-workarounds
170KBUILD_CFLAGS_MODULE += -msb1-pass1-workarounds
171endif
172endif
173
174#
175# Firmware support
176#
177libs-$(CONFIG_ARC) += arch/mips/fw/arc/
178libs-$(CONFIG_CFE) += arch/mips/fw/cfe/
179libs-$(CONFIG_SNIPROM) += arch/mips/fw/sni/
180libs-y += arch/mips/fw/lib/
181
182#
183# Kernel compression
184#
185ifdef SYS_SUPPORTS_ZBOOT
186COMPRESSION_FNAME = vmlinuz
187else
188COMPRESSION_FNAME = vmlinux
189endif
190
191#
192# Board-dependent options and extra files
193#
194include $(srctree)/arch/mips/Kbuild.platforms
195
196cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic
197drivers-$(CONFIG_PCI) += arch/mips/pci/
198
199#
200# Automatically detect the build format. By default we choose
201# the elf format according to the load address.
202# We can always force a build with a 64-bits symbol format by
203# passing 'KBUILD_SYM32=no' option to the make's command line.
204#
205ifdef CONFIG_64BIT
206 ifndef KBUILD_SYM32
207 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
208 KBUILD_SYM32 = y
209 endif
210 endif
211
212 ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
213 cflags-y += -msym32 -DKBUILD_64BIT_SYM32
214 else
215 ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
216 $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
217 endif
218 endif
219endif
220
221KBUILD_AFLAGS += $(cflags-y)
222KBUILD_CFLAGS += $(cflags-y)
223KBUILD_CPPFLAGS += -D"VMLINUX_LOAD_ADDRESS=$(load-y)"
224KBUILD_CPPFLAGS += -D"DATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)"
225
226LDFLAGS += -m $(ld-emul)
227
228ifdef CONFIG_MIPS
229CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -xc /dev/null | \
230 egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
231 sed -e 's/^\#define /-D/' -e "s/ /='/" -e "s/$$/'/")
232ifdef CONFIG_64BIT
233CHECKFLAGS += -m64
234endif
235endif
236
237OBJCOPYFLAGS += --remove-section=.reginfo
238
239head-y := arch/mips/kernel/head.o arch/mips/kernel/init_task.o
240
241libs-y += arch/mips/lib/
242
243# See arch/mips/Kbuild for content of core part of the kernel
244core-y += arch/mips/
245
246drivers-$(CONFIG_OPROFILE) += arch/mips/oprofile/
247
248# suspend and hibernation support
249drivers-$(CONFIG_PM) += arch/mips/power/
250
251ifdef CONFIG_LASAT
252rom.bin rom.sw: vmlinux
253 $(Q)$(MAKE) $(build)=arch/mips/lasat/image $@
254endif
255
256#
257# Some machines like the Indy need 32-bit ELF binaries for booting purposes.
258# Other need ECOFF, so we build a 32-bit ELF binary for them which we then
259# convert to ECOFF using elf2ecoff.
260#
261vmlinux.32: vmlinux
262 $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
263
264
265#obj-$(CONFIG_KPROBES) += kprobes.o
266
267#
268# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
269# ELF files from 32-bit files by conversion.
270#
271vmlinux.64: vmlinux
272 $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
273
274all: $(all-y)
275
276# boot
277vmlinux.bin vmlinux.ecoff vmlinux.srec: $(vmlinux-32) FORCE
278 $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) arch/mips/boot/$@
279
280# boot/compressed
281vmlinuz vmlinuz.bin vmlinuz.ecoff vmlinuz.srec: $(vmlinux-32) FORCE
282 $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
283 VMLINUX_LOAD_ADDRESS=$(load-y) 32bit-bfd=$(32bit-bfd) $@
284
285
286CLEAN_FILES += vmlinux.32 vmlinux.64
287
288archprepare:
289ifdef CONFIG_MIPS32_N32
290 @echo ' Checking missing-syscalls for N32'
291 $(Q)$(MAKE) $(build)=. missing-syscalls EXTRA_CFLAGS="-mabi=n32"
292endif
293ifdef CONFIG_MIPS32_O32
294 @echo ' Checking missing-syscalls for O32'
295 $(Q)$(MAKE) $(build)=. missing-syscalls EXTRA_CFLAGS="-mabi=32"
296endif
297
298install:
299 $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
300 $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
301 $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
302 $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
303
304archclean:
305 $(Q)$(MAKE) $(clean)=arch/mips/boot
306 $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
307 $(Q)$(MAKE) $(clean)=arch/mips/lasat
308
309define archhelp
310 echo ' install - install kernel into $(INSTALL_PATH)'
311 echo ' vmlinux.ecoff - ECOFF boot image'
312 echo ' vmlinux.bin - Raw binary boot image'
313 echo ' vmlinux.srec - SREC boot image'
314 echo ' vmlinuz - Compressed boot(zboot) image'
315 echo ' vmlinuz.ecoff - ECOFF zboot image'
316 echo ' vmlinuz.bin - Raw binary zboot image'
317 echo ' vmlinuz.srec - SREC zboot image'
318 echo
319 echo ' These will be default as apropriate for a configured platform.'
320endef