xref: /openbmc/linux/arch/powerpc/Makefile (revision e868d61272caa648214046a096e5a6bfc068dc8c)
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	:= $(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$(SZ)
61endif
62
63LDFLAGS_vmlinux	:= -Bstatic
64
65# The -Iarch/$(ARCH)/include is temporary while we are merging
66CPPFLAGS-$(CONFIG_PPC32) := -Iarch/$(ARCH) -Iarch/$(ARCH)/include
67AFLAGS-$(CONFIG_PPC32)	:= -Iarch/$(ARCH)
68CFLAGS-$(CONFIG_PPC64)	:= -mminimal-toc -mtraceback=none  -mcall-aixdesc
69CFLAGS-$(CONFIG_PPC32)	:= -Iarch/$(ARCH) -ffixed-r2 -mmultiple
70CPPFLAGS	+= $(CPPFLAGS-y)
71AFLAGS		+= $(AFLAGS-y)
72CFLAGS		+= -msoft-float -pipe $(CFLAGS-y)
73CPP		= $(CC) -E $(CFLAGS)
74# Temporary hack until we have migrated to asm-powerpc
75LINUXINCLUDE-$(CONFIG_PPC32)	:= -Iarch/$(ARCH)/include
76LINUXINCLUDE    += $(LINUXINCLUDE-y)
77
78CHECKFLAGS	+= -m$(SZ) -D__powerpc__ -D__powerpc$(SZ)__
79
80ifeq ($(CONFIG_PPC64),y)
81GCC_BROKEN_VEC	:= $(shell if [ $(call cc-version) -lt 0400 ] ; then echo "y"; fi)
82
83ifeq ($(CONFIG_POWER4_ONLY),y)
84ifeq ($(CONFIG_ALTIVEC),y)
85ifeq ($(GCC_BROKEN_VEC),y)
86	CFLAGS += $(call cc-option,-mcpu=970)
87else
88	CFLAGS += $(call cc-option,-mcpu=power4)
89endif
90else
91	CFLAGS += $(call cc-option,-mcpu=power4)
92endif
93else
94	CFLAGS += $(call cc-option,-mtune=power4)
95endif
96endif
97
98# No AltiVec instruction when building kernel
99CFLAGS += $(call cc-option,-mno-altivec)
100
101# Enable unit-at-a-time mode when possible. It shrinks the
102# kernel considerably.
103CFLAGS += $(call cc-option,-funit-at-a-time)
104
105# Never use string load/store instructions as they are
106# often slow when they are implemented at all
107CFLAGS		+= -mno-string
108
109ifeq ($(CONFIG_6xx),y)
110CFLAGS		+= -mcpu=powerpc
111endif
112
113cpu-as-$(CONFIG_4xx)		+= -Wa,-m405
114cpu-as-$(CONFIG_6xx)		+= -Wa,-maltivec
115cpu-as-$(CONFIG_POWER4)		+= -Wa,-maltivec
116cpu-as-$(CONFIG_E500)		+= -Wa,-me500
117cpu-as-$(CONFIG_E200)		+= -Wa,-me200
118
119AFLAGS += $(cpu-as-y)
120CFLAGS += $(cpu-as-y)
121
122head-y				:= arch/powerpc/kernel/head_32.o
123head-$(CONFIG_PPC64)		:= arch/powerpc/kernel/head_64.o
124head-$(CONFIG_8xx)		:= arch/powerpc/kernel/head_8xx.o
125head-$(CONFIG_4xx)		:= arch/powerpc/kernel/head_4xx.o
126head-$(CONFIG_44x)		:= arch/powerpc/kernel/head_44x.o
127head-$(CONFIG_FSL_BOOKE)	:= arch/powerpc/kernel/head_fsl_booke.o
128
129head-$(CONFIG_PPC64)		+= arch/powerpc/kernel/entry_64.o
130head-$(CONFIG_PPC_FPU)		+= arch/powerpc/kernel/fpu.o
131
132core-y				+= arch/powerpc/kernel/ \
133				   arch/powerpc/mm/ \
134				   arch/powerpc/lib/ \
135				   arch/powerpc/sysdev/ \
136				   arch/powerpc/platforms/
137core-$(CONFIG_MATH_EMULATION)	+= arch/powerpc/math-emu/
138core-$(CONFIG_XMON)		+= arch/powerpc/xmon/
139
140drivers-$(CONFIG_OPROFILE)	+= arch/powerpc/oprofile/
141
142# Default to zImage, override when needed
143defaultimage-y			:= zImage
144defaultimage-$(CONFIG_PPC_ISERIES) := vmlinux
145defaultimage-$(CONFIG_DEFAULT_UIMAGE) := uImage
146KBUILD_IMAGE := $(defaultimage-y)
147all: $(KBUILD_IMAGE)
148
149CPPFLAGS_vmlinux.lds	:= -Upowerpc
150
151BOOT_TARGETS = zImage zImage.initrd zImage.dts zImage.dts_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 ! /bin/echo dssall | $(AS) -many -o $(TOUT) >/dev/null 2>&1 ; then \
205		echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build ' ; \
206		echo 'correctly with old versions of binutils.' ; \
207		echo '*** Please upgrade your binutils to 2.12.1 or newer' ; \
208		false ; \
209	fi
210
211CLEAN_FILES += $(TOUT)
212
213