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
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
10 # Copyright (C) 1994 by Linus Torvalds
11 # Changes for PPC by Gary Thomas
12 # Rewritten by Cort Dougan and Paul Mackerras
15 HAS_BIARCH
:= $(call cc-option-yn
, -m32
)
17 # Set default 32 bits cross compilers for vdso and boot wrapper
20 CROSS32CC
:= $(CROSS32_COMPILE
)gcc
21 CROSS32AR
:= $(CROSS32_COMPILE
)ar
23 ifeq ($(HAS_BIARCH
),y
)
24 ifeq ($(CROSS32_COMPILE
),)
25 CROSS32CC
:= $(CC
) -m32
26 CROSS32AR
:= GNUTARGET
=elf32-powerpc
$(AR
)
30 export CROSS32CC CROSS32AR
32 ifeq ($(CROSS_COMPILE
),)
33 KBUILD_DEFCONFIG
:= $(shell uname
-m
)_defconfig
35 KBUILD_DEFCONFIG
:= ppc64_defconfig
38 ifeq ($(CONFIG_PPC64
),y
)
41 new_nm
:= $(shell if
$(NM
) --help
2>&1 | grep
-- '--synthetic' > /dev
/null
; then echo y
; else echo n
; fi
)
44 NM
:= $(NM
) --synthetic
51 # It seems there are times we use this Makefile without
52 # including the config file, but this replicates the old behaviour
53 ifeq ($(CONFIG_WORD_SIZE
),)
54 CONFIG_WORD_SIZE
:= 32
57 UTS_MACHINE
:= $(OLDARCH
)
59 ifeq ($(HAS_BIARCH
),y
)
60 override AS
+= -a
$(CONFIG_WORD_SIZE
)
61 override LD
+= -m elf
$(CONFIG_WORD_SIZE
)ppc
62 override CC
+= -m
$(CONFIG_WORD_SIZE
)
63 override AR
:= GNUTARGET
=elf
$(CONFIG_WORD_SIZE
)-powerpc
$(AR
)
66 LDFLAGS_vmlinux-y
:= -Bstatic
67 LDFLAGS_vmlinux-
$(CONFIG_RELOCATABLE
) := -pie
68 LDFLAGS_vmlinux
:= $(LDFLAGS_vmlinux-y
)
70 ifeq ($(CONFIG_PPC64
),y
)
71 ifeq ($(call cc-option-yn
,-mcmodel
=medium
),y
)
72 # -mcmodel=medium breaks modules because it uses 32bit offsets from
73 # the TOC pointer to create pointers where possible. Pointers into the
74 # percpu data area are created by this method.
76 # The kernel module loader relocates the percpu data section from the
77 # original location (starting with 0xd...) to somewhere in the base
78 # kernel percpu data space (starting with 0xc...). We need a full
79 # 64bit relocation for this to work, hence -mcmodel=large.
80 KBUILD_CFLAGS_MODULE
+= -mcmodel
=large
82 export NO_MINIMAL_TOC
:= -mno-minimal-toc
86 CFLAGS-
$(CONFIG_PPC64
) := -mtraceback
=no
-mcall-aixdesc
87 CFLAGS-
$(CONFIG_PPC64
) += $(call cc-option
,-mcmodel
=medium
,-mminimal-toc
)
88 CFLAGS-
$(CONFIG_PPC64
) += $(call cc-option
,-mno-pointers-to-nested-functions
)
89 CFLAGS-
$(CONFIG_PPC32
) := -ffixed-r2
-mmultiple
91 CFLAGS-
$(CONFIG_GENERIC_CPU
) += $(call cc-option
,-mtune
=power7
,-mtune
=power4
)
92 CFLAGS-
$(CONFIG_CELL_CPU
) += $(call cc-option
,-mcpu
=cell
)
93 CFLAGS-
$(CONFIG_POWER4_CPU
) += $(call cc-option
,-mcpu
=power4
)
94 CFLAGS-
$(CONFIG_POWER5_CPU
) += $(call cc-option
,-mcpu
=power5
)
95 CFLAGS-
$(CONFIG_POWER6_CPU
) += $(call cc-option
,-mcpu
=power6
)
96 CFLAGS-
$(CONFIG_POWER7_CPU
) += $(call cc-option
,-mcpu
=power7
)
98 CFLAGS-
$(CONFIG_TUNE_CELL
) += $(call cc-option
,-mtune
=cell
)
100 KBUILD_CPPFLAGS
+= -Iarch
/$(ARCH
)
101 KBUILD_AFLAGS
+= -msoft-float
-Iarch
/$(ARCH
)
102 KBUILD_CFLAGS
+= -msoft-float
-pipe
-Iarch
/$(ARCH
) $(CFLAGS-y
)
103 CPP
= $(CC
) -E
$(KBUILD_CFLAGS
)
105 CHECKFLAGS
+= -m
$(CONFIG_WORD_SIZE
) -D__powerpc__
-D__powerpc
$(CONFIG_WORD_SIZE
)__
107 KBUILD_LDFLAGS_MODULE
+= arch
/powerpc
/lib
/crtsavres.o
109 # No AltiVec or VSX instructions when building kernel
110 KBUILD_CFLAGS
+= $(call cc-option
,-mno-altivec
)
111 KBUILD_CFLAGS
+= $(call cc-option
,-mno-vsx
)
113 # No SPE instruction when building kernel
114 # (We use all available options to help semi-broken compilers)
115 KBUILD_CFLAGS
+= $(call cc-option
,-mno-spe
)
116 KBUILD_CFLAGS
+= $(call cc-option
,-mspe
=no
)
118 # Enable unit-at-a-time mode when possible. It shrinks the
119 # kernel considerably.
120 KBUILD_CFLAGS
+= $(call cc-option
,-funit-at-a-time
)
122 # FIXME: the module load should be taught about the additional relocs
124 # revert to pre-gcc-4.4 behaviour of .eh_frame
125 KBUILD_CFLAGS
+= $(call cc-option
,-fno-dwarf2-cfi-asm
)
127 # Never use string load/store instructions as they are
128 # often slow when they are implemented at all
129 KBUILD_CFLAGS
+= -mno-string
131 ifeq ($(CONFIG_6xx
),y
)
132 KBUILD_CFLAGS
+= -mcpu
=powerpc
135 ifeq ($(CONFIG_E500
),y
)
136 ifeq ($(CONFIG_64BIT
),y
)
137 KBUILD_CFLAGS
+= -mcpu
=e5500
138 KBUILD_AFLAGS
+= -mcpu
=e5500
140 ifeq ($(CONFIG_PPC_E500MC
),y
)
141 KBUILD_CFLAGS
+= -mcpu
=e500mc
142 KBUILD_AFLAGS
+= -mcpu
=e500mc
144 KBUILD_CFLAGS
+= -mcpu
=8540
145 KBUILD_AFLAGS
+= -mcpu
=8540
150 # Work around a gcc code-gen bug with -fno-omit-frame-pointer.
151 ifeq ($(CONFIG_FUNCTION_TRACER
),y
)
152 KBUILD_CFLAGS
+= -mno-sched-epilog
155 cpu-as-
$(CONFIG_4xx
) += -Wa
,-m405
156 cpu-as-
$(CONFIG_ALTIVEC
) += -Wa
,-maltivec
157 cpu-as-
$(CONFIG_E200
) += -Wa
,-me200
159 KBUILD_AFLAGS
+= $(cpu-as-y
)
160 KBUILD_CFLAGS
+= $(cpu-as-y
)
162 head-y
:= arch
/powerpc
/kernel
/head_
$(CONFIG_WORD_SIZE
).o
163 head-
$(CONFIG_8xx
) := arch
/powerpc
/kernel
/head_8xx.o
164 head-
$(CONFIG_40x
) := arch
/powerpc
/kernel
/head_40x.o
165 head-
$(CONFIG_44x
) := arch
/powerpc
/kernel
/head_44x.o
166 head-
$(CONFIG_FSL_BOOKE
) := arch
/powerpc
/kernel
/head_fsl_booke.o
168 head-
$(CONFIG_PPC64
) += arch
/powerpc
/kernel
/entry_64.o
169 head-
$(CONFIG_PPC_FPU
) += arch
/powerpc
/kernel
/fpu.o
170 head-
$(CONFIG_ALTIVEC
) += arch
/powerpc
/kernel
/vector.o
171 head-
$(CONFIG_PPC_OF_BOOT_TRAMPOLINE
) += arch
/powerpc
/kernel
/prom_init.o
173 core-y
+= arch
/powerpc
/kernel
/ \
176 arch
/powerpc
/sysdev
/ \
177 arch
/powerpc
/platforms
/ \
178 arch
/powerpc
/math-emu
/ \
179 arch
/powerpc
/crypto
/ \
181 core-
$(CONFIG_XMON
) += arch
/powerpc
/xmon
/
182 core-
$(CONFIG_KVM
) += arch
/powerpc
/kvm
/
183 core-
$(CONFIG_PERF_EVENTS
) += arch
/powerpc
/perf
/
185 drivers-
$(CONFIG_OPROFILE
) += arch
/powerpc
/oprofile
/
187 # Default to zImage, override when needed
190 # With make 3.82 we cannot mix normal and wildcard targets
191 BOOT_TARGETS1
:= zImage zImage.initrd uImage
192 BOOT_TARGETS2
:= zImage
% dtbImage
% treeImage.
% cuImage.
% simpleImage.
% uImage.
%
194 PHONY
+= $(BOOT_TARGETS1
) $(BOOT_TARGETS2
)
196 boot
:= arch
/$(ARCH
)/boot
198 ifeq ($(CONFIG_RELOCATABLE
),y
)
199 quiet_cmd_relocs_check
= CALL
$<
200 cmd_relocs_check
= perl
$< "$(OBJDUMP)" "$(obj)/vmlinux"
202 PHONY
+= relocs_check
203 relocs_check
: arch
/powerpc
/relocs_check.pl vmlinux
204 $(call cmd
,relocs_check
)
209 $(BOOT_TARGETS1
): vmlinux
210 $(Q
)$(MAKE
) ARCH
=ppc64
$(build
)=$(boot
) $(patsubst %,$(boot
)/%,$@
)
211 $(BOOT_TARGETS2
): vmlinux
212 $(Q
)$(MAKE
) ARCH
=ppc64
$(build
)=$(boot
) $(patsubst %,$(boot
)/%,$@
)
216 $(Q
)$(MAKE
) ARCH
=ppc64
$(build
)=$(boot
) $(patsubst %,$(boot
)/%,$@
)
219 $(Q
)$(MAKE
) ARCH
=ppc64
$(build
)=$(boot
) $(patsubst %,$(boot
)/%,$@
)
222 @echo
'* zImage - Build default images selected by kernel config'
223 @echo
' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
224 @echo
' uImage - U-Boot native image format'
225 @echo
' cuImage.<dt> - Backwards compatible U-Boot image for older'
226 @echo
' versions which do not support device trees'
227 @echo
' dtbImage.<dt> - zImage with an embedded device tree blob'
228 @echo
' simpleImage.<dt> - Firmware independent image.'
229 @echo
' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
230 @echo
' install - Install kernel using'
231 @echo
' (your) ~/bin/$(INSTALLKERNEL) or'
232 @echo
' (distribution) /sbin/$(INSTALLKERNEL) or'
233 @echo
' install to $$(INSTALL_PATH) and run lilo'
234 @echo
' *_defconfig - Select default config from arch/$(ARCH)/configs'
236 @echo
' Targets with <dt> embed a device tree blob inside the image'
237 @echo
' These targets support board with firmware that does not'
238 @echo
' support passing a device tree directly. Replace <dt> with the'
239 @echo
' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
240 @echo
' (minus the .dts extension).'
244 $(Q
)$(MAKE
) $(build
)=$(boot
) install
247 ifeq ($(CONFIG_PPC64
),y
)
248 $(Q
)$(MAKE
) $(build
)=arch
/$(ARCH
)/kernel
/vdso64
$@
250 $(Q
)$(MAKE
) $(build
)=arch
/$(ARCH
)/kernel
/vdso32
$@
253 $(Q
)$(MAKE
) $(clean)=$(boot
)
255 archprepare
: checkbin
257 # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
258 # to stdout and these checks are run even on install targets.
259 TOUT
:= .tmp_gas_check
261 # Check gcc and binutils versions:
262 # - gcc-3.4 and binutils-2.14 are a fatal combination
263 # - Require gcc 4.0 or above on 64-bit
264 # - gcc-4.2.0 has issues compiling modules on 64-bit
266 @if
test "$(call cc-version)" = "0304" ; then \
267 if
! /bin
/echo mftb
5 |
$(AS
) -v
-mppc
-many
-o
$(TOUT
) >/dev
/null
2>&1 ; then \
268 echo
-n
'*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
269 echo
'correctly with gcc-3.4 and your version of binutils.'; \
270 echo
'*** Please upgrade your binutils or downgrade your gcc'; \
274 @if
test "$(call cc-version)" -lt
"0400" \
275 && test "x${CONFIG_PPC64}" = "xy" ; then \
276 echo
-n
"Sorry, GCC v4.0 or above is required to build " ; \
277 echo
"the 64-bit powerpc kernel." ; \
280 @if
test "$(call cc-fullversion)" = "040200" \
281 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
282 echo
-n
'*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
283 echo
'kernel with modules enabled.' ; \
284 echo
-n
'*** Please use a different GCC version or ' ; \
285 echo
'disable kernel modules' ; \
289 CLEAN_FILES
+= $(TOUT
)