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authorMichael Ellerman <mpe@ellerman.id.au>2016-08-11 16:03:14 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2016-09-13 17:37:06 +1000
commit68201fbbb04a030864f8560b05d43d8019f7f8df (patch)
tree9c5fdd5bebb00154cc7eaf9a79780328100ee446 /arch/powerpc/Makefile
parent6abe248e16095547080d54c31b19f4a20319a217 (diff)
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powerpc/Makefile: Drop CONFIG_WORD_SIZE for BITS
Commit 2578bfae84a7 ("[POWERPC] Create and use CONFIG_WORD_SIZE") added CONFIG_WORD_SIZE, and suggests that other arches were going to do likewise. But that never happened, powerpc is the only architecture which uses it. So switch to using a simple make variable, BITS, like x86, sh, sparc and tile. It is also easier to spell and simpler, avoiding any confusion about whether it's defined due to ordering of make vs kconfig. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/Makefile')
-rw-r--r--arch/powerpc/Makefile25
1 files changed, 15 insertions, 10 deletions
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index ff3369b01666..c941d5360366 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -57,10 +57,15 @@ OLDARCH := ppc
endif
endif
-# It seems there are times we use this Makefile without
-# including the config file, but this replicates the old behaviour
-ifeq ($(CONFIG_WORD_SIZE),)
-CONFIG_WORD_SIZE := 32
+# BITS is used as extension for files which are available in a 32 bit
+# and a 64 bit version to simplify shared Makefiles.
+# e.g.: obj-y += foo_$(BITS).o
+export BITS
+
+ifdef CONFIG_PPC64
+ BITS := 64
+else
+ BITS := 32
endif
UTS_MACHINE := $(OLDARCH)
@@ -88,10 +93,10 @@ aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
ifeq ($(HAS_BIARCH),y)
-override AS += -a$(CONFIG_WORD_SIZE)
-override LD += -m elf$(CONFIG_WORD_SIZE)$(LDEMULATION)
-override CC += -m$(CONFIG_WORD_SIZE)
-override AR := GNUTARGET=elf$(CONFIG_WORD_SIZE)-$(GNUTARGET) $(AR)
+override AS += -a$(BITS)
+override LD += -m elf$(BITS)$(LDEMULATION)
+override CC += -m$(BITS)
+override AR := GNUTARGET=elf$(BITS)-$(GNUTARGET) $(AR)
endif
LDFLAGS_vmlinux-y := -Bstatic
@@ -178,7 +183,7 @@ KBUILD_CFLAGS += $(call cc-option,-msoft-float)
KBUILD_CFLAGS += -pipe -Iarch/$(ARCH) $(CFLAGS-y)
CPP = $(CC) -E $(KBUILD_CFLAGS)
-CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
+CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
ifdef CONFIG_CPU_BIG_ENDIAN
CHECKFLAGS += -D__BIG_ENDIAN__
else
@@ -233,7 +238,7 @@ KBUILD_CFLAGS += $(cpu-as-y)
KBUILD_AFLAGS += $(aflags-y)
KBUILD_CFLAGS += $(cflags-y)
-head-y := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
+head-y := arch/powerpc/kernel/head_$(BITS).o
head-$(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