xref: /linux/arch/powerpc/Makefile (revision bd142b70a6bd5522f7d95f0cec06091b93bb0715)
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
15# This must match PAGE_OFFSET in include/asm-powerpc/page.h.
16KERNELLOAD	:= $(CONFIG_KERNEL_START)
17
18HAS_BIARCH	:= $(call cc-option-yn, -m32)
19
20ifeq ($(CONFIG_PPC64),y)
21OLDARCH	:= ppc64
22SZ	:= 64
23
24# Set default 32 bits cross compilers for vdso and boot wrapper
25CROSS32_COMPILE ?=
26
27CROSS32CC		:= $(CROSS32_COMPILE)gcc
28CROSS32AS		:= $(CROSS32_COMPILE)as
29CROSS32LD		:= $(CROSS32_COMPILE)ld
30CROSS32OBJCOPY		:= $(CROSS32_COMPILE)objcopy
31
32ifeq ($(HAS_BIARCH),y)
33ifeq ($(CROSS32_COMPILE),)
34CROSS32CC	:= $(CC) -m32
35CROSS32AS	:= $(AS) -a32
36CROSS32LD	:= $(LD) -m elf32ppc
37CROSS32OBJCOPY	:= $(OBJCOPY)
38endif
39endif
40
41export CROSS32CC CROSS32AS CROSS32LD CROSS32OBJCOPY
42
43new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
44
45ifeq ($(new_nm),y)
46NM		:= $(NM) --synthetic
47endif
48
49else
50OLDARCH	:= ppc
51SZ	:= 32
52endif
53
54ifeq ($(HAS_BIARCH),y)
55override AS	+= -a$(SZ)
56override LD	+= -m elf$(SZ)ppc
57override CC	+= -m$(SZ)
58endif
59
60LDFLAGS_vmlinux	:= -Ttext $(KERNELLOAD) -Bstatic -e $(KERNELLOAD)
61
62# The -Iarch/$(ARCH)/include is temporary while we are merging
63CPPFLAGS	+= -Iarch/$(ARCH) -Iarch/$(ARCH)/include
64AFLAGS		+= -Iarch/$(ARCH)
65CFLAGS		+= -Iarch/$(ARCH) -msoft-float -pipe
66CFLAGS-$(CONFIG_PPC64)	:= -mminimal-toc -mtraceback=none  -mcall-aixdesc
67CFLAGS-$(CONFIG_PPC32)	:= -ffixed-r2 -mmultiple
68CFLAGS		+= $(CFLAGS-y)
69CPP		= $(CC) -E $(CFLAGS)
70# Temporary hack until we have migrated to asm-powerpc
71LINUXINCLUDE    += -Iarch/$(ARCH)/include
72
73CHECKFLAGS	+= -m$(SZ) -D__powerpc__ -D__powerpc$(SZ)__
74
75ifeq ($(CONFIG_PPC64),y)
76GCC_VERSION     := $(call cc-version)
77GCC_BROKEN_VEC	:= $(shell if [ $(GCC_VERSION) -lt 0400 ] ; then echo "y"; fi)
78
79ifeq ($(CONFIG_POWER4_ONLY),y)
80ifeq ($(CONFIG_ALTIVEC),y)
81ifeq ($(GCC_BROKEN_VEC),y)
82	CFLAGS += $(call cc-option,-mcpu=970)
83else
84	CFLAGS += $(call cc-option,-mcpu=power4)
85endif
86else
87	CFLAGS += $(call cc-option,-mcpu=power4)
88endif
89else
90	CFLAGS += $(call cc-option,-mtune=power4)
91endif
92endif
93
94# Enable unit-at-a-time mode when possible. It shrinks the
95# kernel considerably.
96CFLAGS += $(call cc-option,-funit-at-a-time)
97
98ifndef CONFIG_FSL_BOOKE
99CFLAGS		+= -mstring
100endif
101
102cpu-as-$(CONFIG_PPC64BRIDGE)	+= -Wa,-mppc64bridge
103cpu-as-$(CONFIG_4xx)		+= -Wa,-m405
104cpu-as-$(CONFIG_6xx)		+= -Wa,-maltivec
105cpu-as-$(CONFIG_POWER4)		+= -Wa,-maltivec
106cpu-as-$(CONFIG_E500)		+= -Wa,-me500
107cpu-as-$(CONFIG_E200)		+= -Wa,-me200
108
109AFLAGS += $(cpu-as-y)
110CFLAGS += $(cpu-as-y)
111
112# Default to the common case.
113KBUILD_DEFCONFIG := common_defconfig
114
115head-y				:= arch/powerpc/kernel/head.o
116head-$(CONFIG_PPC64)		:= arch/powerpc/kernel/head_64.o
117head-$(CONFIG_8xx)		:= arch/powerpc/kernel/head_8xx.o
118head-$(CONFIG_4xx)		:= arch/powerpc/kernel/head_4xx.o
119head-$(CONFIG_44x)		:= arch/powerpc/kernel/head_44x.o
120head-$(CONFIG_FSL_BOOKE)	:= arch/powerpc/kernel/head_fsl_booke.o
121
122ifeq ($(CONFIG_PPC32),y)
123head-$(CONFIG_6xx)		+= arch/powerpc/kernel/idle_6xx.o
124head-$(CONFIG_PPC_FPU)		+= arch/powerpc/kernel/fpu.o
125endif
126
127core-y				+= arch/powerpc/kernel/ \
128				   arch/$(OLDARCH)/kernel/ \
129				   arch/powerpc/mm/ \
130				   arch/powerpc/lib/ \
131				   arch/powerpc/sysdev/ \
132				   arch/powerpc/platforms/
133core-$(CONFIG_PPC32)		+= arch/ppc/syslib/
134core-$(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
143BOOT_TARGETS = zImage zImage.initrd znetboot znetboot.initrd vmlinux.sm
144
145.PHONY: $(BOOT_TARGETS)
146
147all: uImage zImage
148
149CPPFLAGS_vmlinux.lds	:= -Upowerpc
150
151# All the instructions talk about "make bzImage".
152bzImage: zImage
153
154boot := arch/$(OLDARCH)/boot
155
156$(BOOT_TARGETS): vmlinux
157	$(Q)$(MAKE) ARCH=$(OLDARCH) $(build)=$(boot) $@
158
159uImage: vmlinux
160	$(Q)$(MAKE) ARCH=$(OLDARCH) $(build)=$(boot)/images $(boot)/images/$@
161
162define archhelp
163  @echo '* zImage          - Compressed kernel image (arch/$(ARCH)/boot/images/zImage.*)'
164  @echo '  uImage          - Create a bootable image for U-Boot / PPCBoot'
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)/ppc/configs'
170endef
171
172archclean:
173	$(Q)$(MAKE) $(clean)=$(boot)
174	# Temporary hack until we have migrated to asm-powerpc
175	$(Q)rm -rf arch/$(ARCH)/include
176
177archprepare: checkbin
178
179# Temporary hack until we have migrated to asm-powerpc
180include/asm: arch/$(ARCH)/include/asm
181arch/$(ARCH)/include/asm:
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
184
185# Use the file '.tmp_gas_check' for binutils tests, as gas won't output
186# to stdout and these checks are run even on install targets.
187TOUT	:= .tmp_gas_check
188# Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec
189# instructions.
190# gcc-3.4 and binutils-2.14 are a fatal combination.
191GCC_VERSION	:= $(call cc-version)
192
193checkbin:
194	@if test "$(GCC_VERSION)" = "0304" ; then \
195		if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
196			echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
197			echo 'correctly with gcc-3.4 and your version of binutils.'; \
198			echo '*** Please upgrade your binutils or downgrade your gcc'; \
199			false; \
200		fi ; \
201	fi
202	@if ! /bin/echo dssall | $(AS) -many -o $(TOUT) >/dev/null 2>&1 ; then \
203		echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build ' ; \
204		echo 'correctly with old versions of binutils.' ; \
205		echo '*** Please upgrade your binutils to 2.12.1 or newer' ; \
206		false ; \
207	fi
208
209CLEAN_FILES += $(TOUT)
210
211