aboutsummaryrefslogtreecommitdiffstats
path: root/arch/powerpc/Makefile
blob: f70df9b64f8f601c420e857d0fba4a4f9b85276d (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies. Remember to do have actions
# for "archclean" and "archdep" for cleaning up and making dependencies for
# this architecture.
#
# This file is subject to the terms and conditions of the GNU General Public
# License.  See the file "COPYING" in the main directory of this archive
# for more details.
#
# Copyright (C) 1994 by Linus Torvalds
# Changes for PPC by Gary Thomas
# Rewritten by Cort Dougan and Paul Mackerras
#

HAS_BIARCH	:= $(call cc-option-yn, -m32)

# Set default 32 bits cross compilers for vdso and boot wrapper
CROSS32_COMPILE ?=

CROSS32CC		:= $(CROSS32_COMPILE)gcc
CROSS32AS		:= $(CROSS32_COMPILE)as
CROSS32LD		:= $(CROSS32_COMPILE)ld
CROSS32AR		:= $(CROSS32_COMPILE)ar
CROSS32OBJCOPY		:= $(CROSS32_COMPILE)objcopy

ifeq ($(HAS_BIARCH),y)
ifeq ($(CROSS32_COMPILE),)
CROSS32CC	:= $(CC) -m32
CROSS32AS	:= $(AS) -a32
CROSS32LD	:= $(LD) -m elf32ppc
CROSS32OBJCOPY	:= $(OBJCOPY)
CROSS32AR	:= GNUTARGET=elf32-powerpc $(AR)
endif
endif

export CROSS32CC CROSS32AS CROSS32LD CROSS32AR CROSS32OBJCOPY

ifeq ($(CROSS_COMPILE),)
KBUILD_DEFCONFIG := $(shell uname -m)_defconfig
else
KBUILD_DEFCONFIG := ppc64_defconfig
endif

ifeq ($(CONFIG_PPC64),y)
OLDARCH	:= ppc64

new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)

ifeq ($(new_nm),y)
NM		:= $(NM) --synthetic
endif

else
OLDARCH	:= ppc
endif

# It seems there are times we use this Makefile without
# including the config file, but this replicates the old behaviour
ifeq ($(CONFIG_WORD_SIZE),)
CONFIG_WORD_SIZE := 32
endif

UTS_MACHINE := $(OLDARCH)

ifeq ($(HAS_BIARCH),y)
override AS	+= -a$(CONFIG_WORD_SIZE)
override LD	+= -m elf$(CONFIG_WORD_SIZE)ppc
override CC	+= -m$(CONFIG_WORD_SIZE)
override AR	:= GNUTARGET=elf$(CONFIG_WORD_SIZE)-powerpc $(AR)
endif

LDFLAGS_vmlinux	:= -Bstatic

CPPFLAGS-$(CONFIG_PPC32) := -Iarch/$(ARCH)
AFLAGS-$(CONFIG_PPC32)	:= -Iarch/$(ARCH)
CFLAGS-$(CONFIG_PPC64)	:= -mminimal-toc -mtraceback=none  -mcall-aixdesc
CFLAGS-$(CONFIG_PPC32)	:= -Iarch/$(ARCH) -ffixed-r2 -mmultiple
KBUILD_CPPFLAGS	+= $(CPPFLAGS-y)
KBUILD_AFLAGS	+= $(AFLAGS-y)
KBUILD_CFLAGS	+= -msoft-float -pipe $(CFLAGS-y)
CPP		= $(CC) -E $(KBUILD_CFLAGS)

CHECKFLAGS	+= -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__

ifeq ($(CONFIG_PPC64),y)
GCC_BROKEN_VEC	:= $(shell if [ $(call cc-version) -lt 0400 ] ; then echo "y"; fi)

ifeq ($(CONFIG_POWER4_ONLY),y)
ifeq ($(CONFIG_ALTIVEC),y)
ifeq ($(GCC_BROKEN_VEC),y)
	KBUILD_CFLAGS += $(call cc-option,-mcpu=970)
else
	KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
endif
else
	KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
endif
else
	KBUILD_CFLAGS += $(call cc-option,-mtune=power4)
endif
endif

ifeq ($(CONFIG_TUNE_CELL),y)
	KBUILD_CFLAGS += $(call cc-option,-mtune=cell)
endif

# No AltiVec instruction when building kernel
KBUILD_CFLAGS += $(call cc-option,-mno-altivec)

# No SPE instruction when building kernel
KBUILD_CFLAGS += $(call cc-option,-mno-spe)

# Enable unit-at-a-time mode when possible. It shrinks the
# kernel considerably.
KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)

# Never use string load/store instructions as they are
# often slow when they are implemented at all
KBUILD_CFLAGS		+= -mno-string

ifeq ($(CONFIG_6xx),y)
KBUILD_CFLAGS		+= -mcpu=powerpc
endif

cpu-as-$(CONFIG_4xx)		+= -Wa,-m405
cpu-as-$(CONFIG_6xx)		+= -Wa,-maltivec
cpu-as-$(CONFIG_POWER4)		+= -Wa,-maltivec
cpu-as-$(CONFIG_E500)		+= -Wa,-me500
cpu-as-$(CONFIG_E200)		+= -Wa,-me200

KBUILD_AFLAGS += $(cpu-as-y)
KBUILD_CFLAGS += $(cpu-as-y)

head-y				:= arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
head-$(CONFIG_8xx)		:= arch/powerpc/kernel/head_8xx.o
head-$(CONFIG_40x)		:= arch/powerpc/kernel/head_40x.o
head-$(CONFIG_44x)		:= arch/powerpc/kernel/head_44x.o
head-$(CONFIG_FSL_BOOKE)	:= arch/powerpc/kernel/head_fsl_booke.o

head-$(CONFIG_PPC64)		+= arch/powerpc/kernel/entry_64.o
head-$(CONFIG_PPC_FPU)		+= arch/powerpc/kernel/fpu.o

core-y				+= arch/powerpc/kernel/ \
				   arch/powerpc/mm/ \
				   arch/powerpc/lib/ \
				   arch/powerpc/sysdev/ \
				   arch/powerpc/platforms/
core-$(CONFIG_MATH_EMULATION)	+= arch/powerpc/math-emu/
core-$(CONFIG_XMON)		+= arch/powerpc/xmon/

drivers-$(CONFIG_OPROFILE)	+= arch/powerpc/oprofile/

# Default to zImage, override when needed
defaultimage-y			:= zImage
defaultimage-$(CONFIG_DEFAULT_UIMAGE) := uImage
KBUILD_IMAGE := $(defaultimage-y)
all: $(KBUILD_IMAGE)

CPPFLAGS_vmlinux.lds	:= -Upowerpc

BOOT_TARGETS = zImage zImage.initrd uImage

PHONY += $(BOOT_TARGETS)

boot := arch/$(ARCH)/boot

$(BOOT_TARGETS): vmlinux
	$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)

bootwrapper_install:
	$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)

define archhelp
  @echo '* zImage          - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
  @echo '  install         - Install kernel using'
  @echo '                    (your) ~/bin/installkernel or'
  @echo '                    (distribution) /sbin/installkernel or'
  @echo '                    install to $$(INSTALL_PATH) and run lilo'
  @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
endef

install: vdso_install
	$(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install

vdso_install:
ifeq ($(CONFIG_PPC64),y)
	$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
endif
	$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@

archclean:
	$(Q)$(MAKE) $(clean)=$(boot)

archprepare: checkbin

# Use the file '.tmp_gas_check' for binutils tests, as gas won't output
# to stdout and these checks are run even on install targets.
TOUT	:= .tmp_gas_check
# Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec
# instructions.
# gcc-3.4 and binutils-2.14 are a fatal combination.

checkbin:
	@if test "$(call cc-version)" = "0304" ; then \
		if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
			echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
			echo 'correctly with gcc-3.4 and your version of binutils.'; \
			echo '*** Please upgrade your binutils or downgrade your gcc'; \
			false; \
		fi ; \
	fi
	@if test "$(call cc-fullversion)" = "040200" \
	    && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
		echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
		echo 'kernel with modules enabled.' ; \
		echo -n '*** Please use a different GCC version or ' ; \
		echo 'disable kernel modules' ; \
		false ; \
	fi
	@if ! /bin/echo dssall | $(AS) -many -o $(TOUT) >/dev/null 2>&1 ; then \
		echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build ' ; \
		echo 'correctly with old versions of binutils.' ; \
		echo '*** Please upgrade your binutils to 2.12.1 or newer' ; \
		false ; \
	fi

CLEAN_FILES += $(TOUT)