xref: /openbmc/linux/arch/powerpc/Makefile (revision 87c2ce3b) 
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
23CROSS32OBJCOPY		:= $(CROSS32_COMPILE)objcopy
24
25ifeq ($(HAS_BIARCH),y)
26ifeq ($(CROSS32_COMPILE),)
27CROSS32CC	:= $(CC) -m32
28CROSS32AS	:= $(AS) -a32
29CROSS32LD	:= $(LD) -m elf32ppc
30CROSS32OBJCOPY	:= $(OBJCOPY)
31endif
32endif
33
34export CROSS32CC CROSS32AS CROSS32LD CROSS32OBJCOPY
35
36KBUILD_DEFCONFIG := $(shell uname -m)_defconfig
37
38ifeq ($(CONFIG_PPC64),y)
39OLDARCH	:= ppc64
40SZ	:= 64
41
42new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
43
44ifeq ($(new_nm),y)
45NM		:= $(NM) --synthetic
46endif
47
48else
49OLDARCH	:= ppc
50SZ	:= 32
51endif
52
53UTS_MACHINE := $(OLDARCH)
54
55ifeq ($(HAS_BIARCH),y)
56override AS	+= -a$(SZ)
57override LD	+= -m elf$(SZ)ppc
58override CC	+= -m$(SZ)
59endif
60
61LDFLAGS_vmlinux	:= -Bstatic
62
63# The -Iarch/$(ARCH)/include is temporary while we are merging
64CPPFLAGS-$(CONFIG_PPC32) := -Iarch/$(ARCH) -Iarch/$(ARCH)/include
65AFLAGS-$(CONFIG_PPC32)	:= -Iarch/$(ARCH)
66CFLAGS-$(CONFIG_PPC64)	:= -mminimal-toc -mtraceback=none  -mcall-aixdesc
67CFLAGS-$(CONFIG_PPC32)	:= -Iarch/$(ARCH) -ffixed-r2 -mmultiple
68CPPFLAGS	+= $(CPPFLAGS-y)
69AFLAGS		+= $(AFLAGS-y)
70CFLAGS		+= -msoft-float -pipe $(CFLAGS-y)
71CPP		= $(CC) -E $(CFLAGS)
72# Temporary hack until we have migrated to asm-powerpc
73LINUXINCLUDE-$(CONFIG_PPC32)	:= -Iarch/$(ARCH)/include
74LINUXINCLUDE    += $(LINUXINCLUDE-y)
75
76CHECKFLAGS	+= -m$(SZ) -D__powerpc__ -D__powerpc$(SZ)__
77
78ifeq ($(CONFIG_PPC64),y)
79GCC_VERSION     := $(call cc-version)
80GCC_BROKEN_VEC	:= $(shell if [ $(GCC_VERSION) -lt 0400 ] ; then echo "y"; fi)
81
82ifeq ($(CONFIG_POWER4_ONLY),y)
83ifeq ($(CONFIG_ALTIVEC),y)
84ifeq ($(GCC_BROKEN_VEC),y)
85	CFLAGS += $(call cc-option,-mcpu=970)
86else
87	CFLAGS += $(call cc-option,-mcpu=power4)
88endif
89else
90	CFLAGS += $(call cc-option,-mcpu=power4)
91endif
92else
93	CFLAGS += $(call cc-option,-mtune=power4)
94endif
95endif
96
97# No AltiVec instruction when building kernel
98CFLAGS += $(call cc-option,-mno-altivec)
99
100# Enable unit-at-a-time mode when possible. It shrinks the
101# kernel considerably.
102CFLAGS += $(call cc-option,-funit-at-a-time)
103
104ifndef CONFIG_FSL_BOOKE
105CFLAGS		+= -mstring
106endif
107
108cpu-as-$(CONFIG_PPC64BRIDGE)	+= -Wa,-mppc64bridge
109cpu-as-$(CONFIG_4xx)		+= -Wa,-m405
110cpu-as-$(CONFIG_6xx)		+= -Wa,-maltivec
111cpu-as-$(CONFIG_POWER4)		+= -Wa,-maltivec
112cpu-as-$(CONFIG_E500)		+= -Wa,-me500
113cpu-as-$(CONFIG_E200)		+= -Wa,-me200
114
115AFLAGS += $(cpu-as-y)
116CFLAGS += $(cpu-as-y)
117
118head-y				:= arch/powerpc/kernel/head_32.o
119head-$(CONFIG_PPC64)		:= arch/powerpc/kernel/head_64.o
120head-$(CONFIG_8xx)		:= arch/powerpc/kernel/head_8xx.o
121head-$(CONFIG_4xx)		:= arch/powerpc/kernel/head_4xx.o
122head-$(CONFIG_44x)		:= arch/powerpc/kernel/head_44x.o
123head-$(CONFIG_FSL_BOOKE)	:= arch/powerpc/kernel/head_fsl_booke.o
124
125head-$(CONFIG_PPC64)		+= arch/powerpc/kernel/entry_64.o
126head-$(CONFIG_PPC_FPU)		+= arch/powerpc/kernel/fpu.o
127
128core-y				+= arch/powerpc/kernel/ \
129				   arch/powerpc/mm/ \
130				   arch/powerpc/lib/ \
131				   arch/powerpc/sysdev/ \
132				   arch/powerpc/platforms/
133core-$(CONFIG_PPC32)		+= arch/ppc/kernel/
134core-$(CONFIG_MATH_EMULATION)	+= arch/ppc/math-emu/
135core-$(CONFIG_XMON)		+= arch/powerpc/xmon/
136core-$(CONFIG_APUS)		+= arch/ppc/amiga/
137drivers-$(CONFIG_8xx)		+= arch/ppc/8xx_io/
138drivers-$(CONFIG_4xx)		+= arch/ppc/4xx_io/
139drivers-$(CONFIG_CPM2)		+= arch/ppc/8260_io/
140
141drivers-$(CONFIG_OPROFILE)	+= arch/powerpc/oprofile/
142
143defaultimage-$(CONFIG_PPC32)	:= zImage
144defaultimage-$(CONFIG_PPC_ISERIES) := vmlinux
145defaultimage-$(CONFIG_PPC_PSERIES) := zImage
146KBUILD_IMAGE := $(defaultimage-y)
147all: $(KBUILD_IMAGE)
148
149CPPFLAGS_vmlinux.lds	:= -Upowerpc
150
151# All the instructions talk about "make bzImage".
152bzImage: zImage
153
154BOOT_TARGETS = zImage zImage.initrd znetboot znetboot.initrd vmlinux.sm uImage
155
156.PHONY: $(BOOT_TARGETS)
157
158boot := arch/$(ARCH)/boot
159
160$(BOOT_TARGETS): vmlinux
161	$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
162
163define archhelp
164  @echo '* zImage          - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
165  @echo '  install         - Install kernel using'
166  @echo '                    (your) ~/bin/installkernel or'
167  @echo '                    (distribution) /sbin/installkernel or'
168  @echo '                    install to $$(INSTALL_PATH) and run lilo'
169  @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
170endef
171
172archclean:
173	$(Q)$(MAKE) $(clean)=$(boot)
174	$(Q)rm -rf arch/$(ARCH)/include
175
176archprepare: checkbin
177
178ifeq ($(CONFIG_PPC32),y)
179# Temporary hack until we have migrated to asm-powerpc
180include/asm: arch/$(ARCH)/include/asm
181arch/$(ARCH)/include/asm: FORCE
182	$(Q)if [ ! -d arch/$(ARCH)/include ]; then mkdir -p arch/$(ARCH)/include; fi
183	$(Q)ln -fsn $(srctree)/include/asm-$(OLDARCH) arch/$(ARCH)/include/asm
184endif
185
186# Use the file '.tmp_gas_check' for binutils tests, as gas won't output
187# to stdout and these checks are run even on install targets.
188TOUT	:= .tmp_gas_check
189# Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec
190# instructions.
191# gcc-3.4 and binutils-2.14 are a fatal combination.
192GCC_VERSION	:= $(call cc-version)
193
194checkbin:
195	@if test "$(GCC_VERSION)" = "0304" ; then \
196		if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
197			echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
198			echo 'correctly with gcc-3.4 and your version of binutils.'; \
199			echo '*** Please upgrade your binutils or downgrade your gcc'; \
200			false; \
201		fi ; \
202	fi
203	@if ! /bin/echo dssall | $(AS) -many -o $(TOUT) >/dev/null 2>&1 ; then \
204		echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build ' ; \
205		echo 'correctly with old versions of binutils.' ; \
206		echo '*** Please upgrade your binutils to 2.12.1 or newer' ; \
207		false ; \
208	fi
209
210CLEAN_FILES += $(TOUT)
211
212