tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 $(AR)
33endif
34endif
35
36export CROSS32CC CROSS32AS CROSS32LD CROSS32AR CROSS32OBJCOPY
37
38ifeq ($(CROSS_COMPILE),)
39KBUILD_DEFCONFIG := $(shell uname -m)_defconfig
40else
41KBUILD_DEFCONFIG := ppc64_defconfig
42endif
43
44ifeq ($(CONFIG_PPC64),y)
45OLDARCH := ppc64
46
47new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
48
49ifeq ($(new_nm),y)
50NM := $(NM) --synthetic
51endif
52
53else
54OLDARCH := ppc
55endif
56
57# It seems there are times we use this Makefile without
58# including the config file, but this replicates the old behaviour
59ifeq ($(CONFIG_WORD_SIZE),)
60CONFIG_WORD_SIZE := 32
61endif
62
63UTS_MACHINE := $(OLDARCH)
64
65ifeq ($(HAS_BIARCH),y)
66override AS += -a$(CONFIG_WORD_SIZE)
67override LD += -m elf$(CONFIG_WORD_SIZE)ppc
68override CC += -m$(CONFIG_WORD_SIZE)
69override AR := GNUTARGET=elf$(CONFIG_WORD_SIZE)-powerpc $(AR)
70endif
71
72LDFLAGS_vmlinux := -Bstatic
73
74CPPFLAGS-$(CONFIG_PPC32) := -Iarch/$(ARCH)
75AFLAGS-$(CONFIG_PPC32) := -Iarch/$(ARCH)
76CFLAGS-$(CONFIG_PPC64) := -mminimal-toc -mtraceback=none -mcall-aixdesc
77CFLAGS-$(CONFIG_PPC32) := -Iarch/$(ARCH) -ffixed-r2 -mmultiple
78KBUILD_CPPFLAGS += $(CPPFLAGS-y)
79KBUILD_AFLAGS += $(AFLAGS-y)
80KBUILD_CFLAGS += -msoft-float -pipe $(CFLAGS-y)
81CPP = $(CC) -E $(KBUILD_CFLAGS)
82
83CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
84
85ifeq ($(CONFIG_PPC64),y)
86GCC_BROKEN_VEC := $(shell if [ $(call cc-version) -lt 0400 ] ; then echo "y"; fi)
87
88ifeq ($(CONFIG_POWER4_ONLY),y)
89ifeq ($(CONFIG_ALTIVEC),y)
90ifeq ($(GCC_BROKEN_VEC),y)
91 KBUILD_CFLAGS += $(call cc-option,-mcpu=970)
92else
93 KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
94endif
95else
96 KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
97endif
98else
99 KBUILD_CFLAGS += $(call cc-option,-mtune=power4)
100endif
101endif
102
103ifeq ($(CONFIG_TUNE_CELL),y)
104 KBUILD_CFLAGS += $(call cc-option,-mtune=cell)
105endif
106
107# No AltiVec instruction when building kernel
108KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
109
110# No SPE instruction when building kernel
111KBUILD_CFLAGS += $(call cc-option,-mno-spe)
112
113# Enable unit-at-a-time mode when possible. It shrinks the
114# kernel considerably.
115KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
116
117# Never use string load/store instructions as they are
118# often slow when they are implemented at all
119KBUILD_CFLAGS += -mno-string
120
121ifeq ($(CONFIG_6xx),y)
122KBUILD_CFLAGS += -mcpu=powerpc
123endif
124
125cpu-as-$(CONFIG_4xx) += -Wa,-m405
126cpu-as-$(CONFIG_6xx) += -Wa,-maltivec
127cpu-as-$(CONFIG_POWER4) += -Wa,-maltivec
128cpu-as-$(CONFIG_E500) += -Wa,-me500
129cpu-as-$(CONFIG_E200) += -Wa,-me200
130
131KBUILD_AFLAGS += $(cpu-as-y)
132KBUILD_CFLAGS += $(cpu-as-y)
133
134head-y := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
135head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o
136head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
137head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
138head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
139
140head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
141head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
142
143core-y += arch/powerpc/kernel/ \
144 arch/powerpc/mm/ \
145 arch/powerpc/lib/ \
146 arch/powerpc/sysdev/ \
147 arch/powerpc/platforms/
148core-$(CONFIG_MATH_EMULATION) += arch/powerpc/math-emu/
149core-$(CONFIG_XMON) += arch/powerpc/xmon/
150
151drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
152
153# Default to zImage, override when needed
154defaultimage-y := zImage
155defaultimage-$(CONFIG_DEFAULT_UIMAGE) := uImage
156KBUILD_IMAGE := $(defaultimage-y)
157all: $(KBUILD_IMAGE)
158
159CPPFLAGS_vmlinux.lds := -Upowerpc
160
161BOOT_TARGETS = zImage zImage.initrd uImage
162
163PHONY += $(BOOT_TARGETS)
164
165boot := arch/$(ARCH)/boot
166
167$(BOOT_TARGETS): vmlinux
168 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
169
170bootwrapper_install:
171 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
172
173define archhelp
174 @echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
175 @echo ' install - Install kernel using'
176 @echo ' (your) ~/bin/installkernel or'
177 @echo ' (distribution) /sbin/installkernel or'
178 @echo ' install to $$(INSTALL_PATH) and run lilo'
179 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
180endef
181
182install: vdso_install
183 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install
184
185vdso_install:
186ifeq ($(CONFIG_PPC64),y)
187 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
188endif
189 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
190
191archclean:
192 $(Q)$(MAKE) $(clean)=$(boot)
193
194archprepare: checkbin
195
196# Use the file '.tmp_gas_check' for binutils tests, as gas won't output
197# to stdout and these checks are run even on install targets.
198TOUT := .tmp_gas_check
199# Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec
200# instructions.
201# gcc-3.4 and binutils-2.14 are a fatal combination.
202
203checkbin:
204 @if test "$(call cc-version)" = "0304" ; then \
205 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
206 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
207 echo 'correctly with gcc-3.4 and your version of binutils.'; \
208 echo '*** Please upgrade your binutils or downgrade your gcc'; \
209 false; \
210 fi ; \
211 fi
212 @if test "$(call cc-fullversion)" = "040200" \
213 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
214 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
215 echo 'kernel with modules enabled.' ; \
216 echo -n '*** Please use a different GCC version or ' ; \
217 echo 'disable kernel modules' ; \
218 false ; \
219 fi
220 @if ! /bin/echo dssall | $(AS) -many -o $(TOUT) >/dev/null 2>&1 ; then \
221 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build ' ; \
222 echo 'correctly with old versions of binutils.' ; \
223 echo '*** Please upgrade your binutils to 2.12.1 or newer' ; \
224 false ; \
225 fi
226
227CLEAN_FILES += $(TOUT)
228