1# This file is included by the global makefile so that you can add your own
2# architecture-specific flags and dependencies. Remember to do have actions
3# for "archclean" and "archdep" for cleaning up and making dependencies for
4# this architecture.
5#
6# This file is subject to the terms and conditions of the GNU General Public
7# License.  See the file "COPYING" in the main directory of this archive
8# for more details.
9#
10# Copyright (C) 1994 by Linus Torvalds
11# Changes for PPC by Gary Thomas
12# Rewritten by Cort Dougan and Paul Mackerras
13#
14
15HAS_BIARCH	:= $(call cc-option-yn, -m32)
16
17# Set default 32 bits cross compilers for vdso and boot wrapper
18CROSS32_COMPILE ?=
19
20CROSS32CC		:= $(CROSS32_COMPILE)gcc
21CROSS32AR		:= $(CROSS32_COMPILE)ar
22
23ifeq ($(HAS_BIARCH),y)
24ifeq ($(CROSS32_COMPILE),)
25CROSS32CC	:= $(CC) -m32
26CROSS32AR	:= GNUTARGET=elf32-powerpc $(AR)
27endif
28endif
29
30export CROSS32CC CROSS32AR
31
32ifeq ($(CROSS_COMPILE),)
33KBUILD_DEFCONFIG := $(shell uname -m)_defconfig
34else
35KBUILD_DEFCONFIG := ppc64_defconfig
36endif
37
38ifeq ($(CONFIG_PPC64),y)
39OLDARCH	:= ppc64
40
41new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
42
43ifeq ($(new_nm),y)
44NM		:= $(NM) --synthetic
45endif
46
47else
48OLDARCH	:= ppc
49endif
50
51# It seems there are times we use this Makefile without
52# including the config file, but this replicates the old behaviour
53ifeq ($(CONFIG_WORD_SIZE),)
54CONFIG_WORD_SIZE := 32
55endif
56
57UTS_MACHINE := $(OLDARCH)
58
59ifeq ($(HAS_BIARCH),y)
60override AS	+= -a$(CONFIG_WORD_SIZE)
61override LD	+= -m elf$(CONFIG_WORD_SIZE)ppc
62override CC	+= -m$(CONFIG_WORD_SIZE)
63override AR	:= GNUTARGET=elf$(CONFIG_WORD_SIZE)-powerpc $(AR)
64endif
65
66LDFLAGS_vmlinux-y := -Bstatic
67LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
68LDFLAGS_vmlinux	:= $(LDFLAGS_vmlinux-y)
69
70asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
71
72CFLAGS-$(CONFIG_PPC64)	:= -mminimal-toc -mtraceback=no -mcall-aixdesc
73CFLAGS-$(CONFIG_PPC32)	:= -ffixed-r2 -mmultiple
74KBUILD_CPPFLAGS	+= -Iarch/$(ARCH) $(asinstr)
75KBUILD_AFLAGS	+= -Iarch/$(ARCH)
76KBUILD_CFLAGS	+= -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y)
77CPP		= $(CC) -E $(KBUILD_CFLAGS)
78
79CHECKFLAGS	+= -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
80
81ifeq ($(CONFIG_PPC64),y)
82GCC_BROKEN_VEC	:= $(call cc-ifversion, -lt, 0400, y)
83
84ifeq ($(CONFIG_POWER4_ONLY),y)
85ifeq ($(CONFIG_ALTIVEC),y)
86ifeq ($(GCC_BROKEN_VEC),y)
87	KBUILD_CFLAGS += $(call cc-option,-mcpu=970)
88else
89	KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
90endif
91else
92	KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
93endif
94else
95	KBUILD_CFLAGS += $(call cc-option,-mtune=power4)
96endif
97endif
98
99KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
100
101ifeq ($(CONFIG_TUNE_CELL),y)
102	KBUILD_CFLAGS += $(call cc-option,-mtune=cell)
103endif
104
105# No AltiVec instruction when building kernel
106KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
107
108# No SPE instruction when building kernel
109# (We use all available options to help semi-broken compilers)
110KBUILD_CFLAGS += $(call cc-option,-mno-spe)
111KBUILD_CFLAGS += $(call cc-option,-mspe=no)
112
113# Enable unit-at-a-time mode when possible. It shrinks the
114# kernel considerably.
115KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
116
117# FIXME: the module load should be taught about the additional relocs
118# generated by this.
119# revert to pre-gcc-4.4 behaviour of .eh_frame
120KBUILD_CFLAGS	+= $(call cc-option,-fno-dwarf2-cfi-asm)
121
122# Never use string load/store instructions as they are
123# often slow when they are implemented at all
124KBUILD_CFLAGS		+= -mno-string
125
126ifeq ($(CONFIG_6xx),y)
127KBUILD_CFLAGS		+= -mcpu=powerpc
128endif
129
130# Work around a gcc code-gen bug with -fno-omit-frame-pointer.
131ifeq ($(CONFIG_FUNCTION_TRACER),y)
132KBUILD_CFLAGS		+= -mno-sched-epilog
133endif
134
135cpu-as-$(CONFIG_4xx)		+= -Wa,-m405
136cpu-as-$(CONFIG_ALTIVEC)	+= -Wa,-maltivec
137cpu-as-$(CONFIG_E500)		+= -Wa,-me500
138cpu-as-$(CONFIG_E200)		+= -Wa,-me200
139
140KBUILD_AFLAGS += $(cpu-as-y)
141KBUILD_CFLAGS += $(cpu-as-y)
142
143head-y				:= arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
144head-$(CONFIG_8xx)		:= arch/powerpc/kernel/head_8xx.o
145head-$(CONFIG_40x)		:= arch/powerpc/kernel/head_40x.o
146head-$(CONFIG_44x)		:= arch/powerpc/kernel/head_44x.o
147head-$(CONFIG_FSL_BOOKE)	:= arch/powerpc/kernel/head_fsl_booke.o
148
149head-$(CONFIG_PPC64)		+= arch/powerpc/kernel/entry_64.o
150head-$(CONFIG_PPC_FPU)		+= arch/powerpc/kernel/fpu.o
151head-$(CONFIG_ALTIVEC)		+= arch/powerpc/kernel/vector.o
152
153core-y				+= arch/powerpc/kernel/ \
154				   arch/powerpc/mm/ \
155				   arch/powerpc/lib/ \
156				   arch/powerpc/sysdev/ \
157				   arch/powerpc/platforms/ \
158				   arch/powerpc/math-emu/ \
159				   arch/powerpc/net/
160core-$(CONFIG_XMON)		+= arch/powerpc/xmon/
161core-$(CONFIG_KVM) 		+= arch/powerpc/kvm/
162core-$(CONFIG_PERF_EVENTS)	+= arch/powerpc/perf/
163
164drivers-$(CONFIG_OPROFILE)	+= arch/powerpc/oprofile/
165
166# Default to zImage, override when needed
167all: zImage
168
169# With make 3.82 we cannot mix normal and wildcard targets
170BOOT_TARGETS1 := zImage zImage.initrd uImage
171BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
172
173PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
174
175boot := arch/$(ARCH)/boot
176
177ifeq ($(CONFIG_RELOCATABLE),y)
178quiet_cmd_relocs_check = CALL    $<
179      cmd_relocs_check = perl $< "$(OBJDUMP)" "$(obj)/vmlinux"
180
181PHONY += relocs_check
182relocs_check: arch/powerpc/relocs_check.pl vmlinux
183	$(call cmd,relocs_check)
184
185zImage: relocs_check
186endif
187
188$(BOOT_TARGETS1): vmlinux
189	$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
190$(BOOT_TARGETS2): vmlinux
191	$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
192
193
194bootwrapper_install:
195	$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
196
197%.dtb:
198	$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
199
200define archhelp
201  @echo '* zImage          - Build default images selected by kernel config'
202  @echo '  zImage.*        - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
203  @echo '  uImage          - U-Boot native image format'
204  @echo '  cuImage.<dt>    - Backwards compatible U-Boot image for older'
205  @echo '                    versions which do not support device trees'
206  @echo '  dtbImage.<dt>   - zImage with an embedded device tree blob'
207  @echo '  simpleImage.<dt> - Firmware independent image.'
208  @echo '  treeImage.<dt>  - Support for older IBM 4xx firmware (not U-Boot)'
209  @echo '  install         - Install kernel using'
210  @echo '                    (your) ~/bin/$(INSTALLKERNEL) or'
211  @echo '                    (distribution) /sbin/$(INSTALLKERNEL) or'
212  @echo '                    install to $$(INSTALL_PATH) and run lilo'
213  @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
214  @echo ''
215  @echo '  Targets with <dt> embed a device tree blob inside the image'
216  @echo '  These targets support board with firmware that does not'
217  @echo '  support passing a device tree directly.  Replace <dt> with the'
218  @echo '  name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
219  @echo '  (minus the .dts extension).'
220endef
221
222install:
223	$(Q)$(MAKE) $(build)=$(boot) install
224
225vdso_install:
226ifeq ($(CONFIG_PPC64),y)
227	$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
228endif
229	$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
230
231archclean:
232	$(Q)$(MAKE) $(clean)=$(boot)
233
234archprepare: checkbin
235
236# Use the file '.tmp_gas_check' for binutils tests, as gas won't output
237# to stdout and these checks are run even on install targets.
238TOUT	:= .tmp_gas_check
239# Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec
240# instructions.
241# gcc-3.4 and binutils-2.14 are a fatal combination.
242
243checkbin:
244	@if test "$(call cc-version)" = "0304" ; then \
245		if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
246			echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
247			echo 'correctly with gcc-3.4 and your version of binutils.'; \
248			echo '*** Please upgrade your binutils or downgrade your gcc'; \
249			false; \
250		fi ; \
251	fi
252	@if test "$(call cc-fullversion)" = "040200" \
253	    && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
254		echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
255		echo 'kernel with modules enabled.' ; \
256		echo -n '*** Please use a different GCC version or ' ; \
257		echo 'disable kernel modules' ; \
258		false ; \
259	fi
260
261CLEAN_FILES += $(TOUT)
262
263