xref: /linux/arch/powerpc/Makefile (revision 15f6527e8e63e793f8ab1ddce4ed3c487ebd0d42) 
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
21CROSS32AS		:= $(CROSS32_COMPILE)as
22CROSS32LD		:= $(CROSS32_COMPILE)ld
23CROSS32AR		:= $(CROSS32_COMPILE)ar
24CROSS32OBJCOPY		:= $(CROSS32_COMPILE)objcopy
25
26ifeq ($(HAS_BIARCH),y)
27ifeq ($(CROSS32_COMPILE),)
28CROSS32CC	:= $(CC) -m32
29CROSS32AS	:= $(AS) -a32
30CROSS32LD	:= $(LD) -m elf32ppc
31CROSS32OBJCOPY	:= $(OBJCOPY)
32CROSS32AR	:= GNUTARGET=elf32-powerpc $(AR)
33endif
34endif
35
36export CROSS32CC CROSS32AS CROSS32LD CROSS32AR CROSS32OBJCOPY
37
38KBUILD_DEFCONFIG := $(shell uname -m)_defconfig
39
40ifeq ($(CONFIG_PPC64),y)
41OLDARCH	:= ppc64
42SZ	:= 64
43
44new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
45
46ifeq ($(new_nm),y)
47NM		:= $(NM) --synthetic
48endif
49
50else
51OLDARCH	:= ppc
52SZ	:= 32
53endif
54
55UTS_MACHINE := $(OLDARCH)
56
57ifeq ($(HAS_BIARCH),y)
58override AS	+= -a$(SZ)
59override LD	+= -m elf$(SZ)ppc
60override CC	+= -m$(SZ)
61override AR	:= GNUTARGET=elf$(SZ)-powerpc $(AR)
62endif
63
64LDFLAGS_vmlinux	:= -Bstatic
65
66# The -Iarch/$(ARCH)/include is temporary while we are merging
67CPPFLAGS-$(CONFIG_PPC32) := -Iarch/$(ARCH) -Iarch/$(ARCH)/include
68AFLAGS-$(CONFIG_PPC32)	:= -Iarch/$(ARCH)
69CFLAGS-$(CONFIG_PPC64)	:= -mminimal-toc -mtraceback=none  -mcall-aixdesc
70CFLAGS-$(CONFIG_PPC32)	:= -Iarch/$(ARCH) -ffixed-r2 -mmultiple
71CPPFLAGS	+= $(CPPFLAGS-y)
72AFLAGS		+= $(AFLAGS-y)
73CFLAGS		+= -msoft-float -pipe $(CFLAGS-y)
74CPP		= $(CC) -E $(CFLAGS)
75# Temporary hack until we have migrated to asm-powerpc
76LINUXINCLUDE-$(CONFIG_PPC32)	:= -Iarch/$(ARCH)/include
77LINUXINCLUDE    += $(LINUXINCLUDE-y)
78
79CHECKFLAGS	+= -m$(SZ) -D__powerpc__ -D__powerpc$(SZ)__
80
81ifeq ($(CONFIG_PPC64),y)
82GCC_BROKEN_VEC	:= $(shell if [ $(call cc-version) -lt 0400 ] ; then echo "y"; fi)
83
84ifeq ($(CONFIG_POWER4_ONLY),y)
85ifeq ($(CONFIG_ALTIVEC),y)
86ifeq ($(GCC_BROKEN_VEC),y)
87	CFLAGS += $(call cc-option,-mcpu=970)
88else
89	CFLAGS += $(call cc-option,-mcpu=power4)
90endif
91else
92	CFLAGS += $(call cc-option,-mcpu=power4)
93endif
94else
95	CFLAGS += $(call cc-option,-mtune=power4)
96endif
97endif
98
99# No AltiVec instruction when building kernel
100CFLAGS += $(call cc-option,-mno-altivec)
101
102# Enable unit-at-a-time mode when possible. It shrinks the
103# kernel considerably.
104CFLAGS += $(call cc-option,-funit-at-a-time)
105
106# Never use string load/store instructions as they are
107# often slow when they are implemented at all
108CFLAGS		+= -mno-string
109
110ifeq ($(CONFIG_6xx),y)
111CFLAGS		+= -mcpu=powerpc
112endif
113
114cpu-as-$(CONFIG_4xx)		+= -Wa,-m405
115cpu-as-$(CONFIG_6xx)		+= -Wa,-maltivec
116cpu-as-$(CONFIG_POWER4)		+= -Wa,-maltivec
117cpu-as-$(CONFIG_E500)		+= -Wa,-me500
118cpu-as-$(CONFIG_E200)		+= -Wa,-me200
119
120AFLAGS += $(cpu-as-y)
121CFLAGS += $(cpu-as-y)
122
123head-y				:= arch/powerpc/kernel/head_32.o
124head-$(CONFIG_PPC64)		:= arch/powerpc/kernel/head_64.o
125head-$(CONFIG_8xx)		:= arch/powerpc/kernel/head_8xx.o
126head-$(CONFIG_40x)		:= arch/powerpc/kernel/head_40x.o
127head-$(CONFIG_44x)		:= arch/powerpc/kernel/head_44x.o
128head-$(CONFIG_FSL_BOOKE)	:= arch/powerpc/kernel/head_fsl_booke.o
129
130head-$(CONFIG_PPC64)		+= arch/powerpc/kernel/entry_64.o
131head-$(CONFIG_PPC_FPU)		+= arch/powerpc/kernel/fpu.o
132
133core-y				+= arch/powerpc/kernel/ \
134				   arch/powerpc/mm/ \
135				   arch/powerpc/lib/ \
136				   arch/powerpc/sysdev/ \
137				   arch/powerpc/platforms/
138core-$(CONFIG_MATH_EMULATION)	+= arch/powerpc/math-emu/
139core-$(CONFIG_XMON)		+= arch/powerpc/xmon/
140
141drivers-$(CONFIG_OPROFILE)	+= arch/powerpc/oprofile/
142
143# Default to zImage, override when needed
144defaultimage-y			:= zImage
145defaultimage-$(CONFIG_DEFAULT_UIMAGE) := uImage
146KBUILD_IMAGE := $(defaultimage-y)
147all: $(KBUILD_IMAGE)
148
149CPPFLAGS_vmlinux.lds	:= -Upowerpc
150
151BOOT_TARGETS = zImage zImage.initrd uImage
152
153PHONY += $(BOOT_TARGETS)
154
155boot := arch/$(ARCH)/boot
156
157$(BOOT_TARGETS): vmlinux
158	$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
159
160define archhelp
161  @echo '* zImage          - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
162  @echo '  install         - Install kernel using'
163  @echo '                    (your) ~/bin/installkernel or'
164  @echo '                    (distribution) /sbin/installkernel or'
165  @echo '                    install to $$(INSTALL_PATH) and run lilo'
166  @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
167endef
168
169install:
170	$(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install
171
172archclean:
173	$(Q)$(MAKE) $(clean)=$(boot)
174
175archmrproper:
176	$(Q)rm -rf arch/$(ARCH)/include
177
178archprepare: checkbin
179
180ifeq ($(CONFIG_PPC32),y)
181# Temporary hack until we have migrated to asm-powerpc
182include/asm: arch/$(ARCH)/include/asm
183arch/$(ARCH)/include/asm: FORCE
184	$(Q)if [ ! -d arch/$(ARCH)/include ]; then mkdir -p arch/$(ARCH)/include; fi
185	$(Q)ln -fsn $(srctree)/include/asm-$(OLDARCH) arch/$(ARCH)/include/asm
186endif
187
188# Use the file '.tmp_gas_check' for binutils tests, as gas won't output
189# to stdout and these checks are run even on install targets.
190TOUT	:= .tmp_gas_check
191# Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec
192# instructions.
193# gcc-3.4 and binutils-2.14 are a fatal combination.
194
195checkbin:
196	@if test "$(call cc-version)" = "0304" ; then \
197		if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
198			echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
199			echo 'correctly with gcc-3.4 and your version of binutils.'; \
200			echo '*** Please upgrade your binutils or downgrade your gcc'; \
201			false; \
202		fi ; \
203	fi
204	@if test "$(call cc-fullversion)" = "040200" \
205	    && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
206		echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
207		echo 'kernel with modules enabled.' ; \
208		echo -n '*** Please use a different GCC version or ' ; \
209		echo 'disable kernel modules' ; \
210		false ; \
211	fi
212	@if ! /bin/echo dssall | $(AS) -many -o $(TOUT) >/dev/null 2>&1 ; then \
213		echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build ' ; \
214		echo 'correctly with old versions of binutils.' ; \
215		echo '*** Please upgrade your binutils to 2.12.1 or newer' ; \
216		false ; \
217	fi
218
219CLEAN_FILES += $(TOUT)
220
221