Move dtc and libfdt sources from arch/powerpc/boot to scripts/dtc

The powerpc kernel always requires an Open Firmware like device tree
to supply device information.  On systems without OF, this comes from
a flattened device tree blob.  This blob is usually generated by dtc,
a tool which compiles a text description of the device tree into the
flattened format used by the kernel.  Sometimes, the bootwrapper makes
small changes to the pre-compiled device tree blob (e.g. filling in
the size of RAM).  To do this it uses the libfdt library.

Because these are only used on powerpc, the code for both these tools
is included under arch/powerpc/boot (these were imported and are
periodically updated from the upstream dtc tree).

However, the microblaze architecture, currently being prepared for
merging to mainline also uses dtc to produce device tree blobs.  A few
other archs have also mentioned some interest in using dtc.
Therefore, this patch moves dtc and libfdt from arch/powerpc into
scripts, where it can be used by any architecture.

The vast bulk of this patch is a literal move, the rest is adjusting
the various Makefiles to use dtc and libfdt correctly from their new
locations.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 4c78045..a0d1146 100644 (file)
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -181,6 +181,10 @@ config SYS_SUPPORTS_APM_EMULATION
        default y if PMAC_APM_EMU
        bool
 
        default y if PMAC_APM_EMU
        bool
 

+config DTC
+       bool
+       default y
+

 config DEFAULT_UIMAGE
        bool
        help
 config DEFAULT_UIMAGE
        bool
        help

diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index 4458abb..8da2bf9 100644 (file)
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -33,7 +33,7 @@ ifeq ($(call cc-option-yn, -fstack-protector),y)
 BOOTCFLAGS     += -fno-stack-protector
 endif
 
 BOOTCFLAGS     += -fno-stack-protector
 endif
 

-BOOTCFLAGS     += -I$(obj) -I$(srctree)/$(obj) -I$(srctree)/$(src)/libfdt
+BOOTCFLAGS     += -I$(obj) -I$(srctree)/$(obj)

 
 DTS_FLAGS      ?= -p 1024
 
 
 DTS_FLAGS      ?= -p 1024
 


@@ -53,9 +53,14 @@ zliblinuxheader := zlib.h zconf.h zutil.h
 $(addprefix $(obj)/,$(zlib) cuboot-c2k.o gunzip_util.o main.o prpmc2800.o): \
        $(addprefix $(obj)/,$(zliblinuxheader)) $(addprefix $(obj)/,$(zlibheader))
 
 $(addprefix $(obj)/,$(zlib) cuboot-c2k.o gunzip_util.o main.o prpmc2800.o): \
        $(addprefix $(obj)/,$(zliblinuxheader)) $(addprefix $(obj)/,$(zlibheader))
 

-src-libfdt := fdt.c fdt_ro.c fdt_wip.c fdt_sw.c fdt_rw.c fdt_strerror.c
+libfdt       := fdt.c fdt_ro.c fdt_wip.c fdt_sw.c fdt_rw.c fdt_strerror.c
+libfdtheader := fdt.h libfdt.h libfdt_internal.h
+
+$(addprefix $(obj)/,$(libfdt) libfdt-wrapper.o simpleboot.o): \
+       $(addprefix $(obj)/,$(libfdtheader))
+

 src-wlib := string.S crt0.S crtsavres.S stdio.c main.c \
 src-wlib := string.S crt0.S crtsavres.S stdio.c main.c \

-               $(addprefix libfdt/,$(src-libfdt)) libfdt-wrapper.c \
+               $(libfdt) libfdt-wrapper.c \

                ns16550.c serial.c simple_alloc.c div64.S util.S \
                gunzip_util.c elf_util.c $(zlib) devtree.c oflib.c ofconsole.c \
                4xx.c ebony.c mv64x60.c mpsc.c mv64x60_i2c.c cuboot.c bamboo.c \
                ns16550.c serial.c simple_alloc.c div64.S util.S \
                gunzip_util.c elf_util.c $(zlib) devtree.c oflib.c ofconsole.c \
                4xx.c ebony.c mv64x60.c mpsc.c mv64x60_i2c.c cuboot.c bamboo.c \


@@ -96,6 +101,12 @@ $(addprefix $(obj)/,$(zlibheader)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
 $(addprefix $(obj)/,$(zliblinuxheader)): $(obj)/%: $(srctree)/include/linux/%
        $(call cmd,copy_zliblinuxheader)
 
 $(addprefix $(obj)/,$(zliblinuxheader)): $(obj)/%: $(srctree)/include/linux/%
        $(call cmd,copy_zliblinuxheader)
 

+quiet_cmd_copy_libfdt = COPY    $@
+      cmd_copy_libfdt = cp $< $@
+
+$(addprefix $(obj)/,$(libfdt) $(libfdtheader)): $(obj)/%: $(srctree)/scripts/dtc/libfdt/%
+       $(call cmd,copy_libfdt)
+

 $(obj)/empty.c:
        @touch $@
 
 $(obj)/empty.c:
        @touch $@
 


@@ -103,6 +114,7 @@ $(obj)/zImage.lds $(obj)/zImage.coff.lds $(obj)/zImage.ps3.lds: $(obj)/%: $(srct
        @cp $< $@
 
 clean-files := $(zlib) $(zlibheader) $(zliblinuxheader) \
        @cp $< $@
 
 clean-files := $(zlib) $(zlibheader) $(zliblinuxheader) \

+               $(libfdt) $(libfdtheader) \

                empty.c zImage.coff.lds zImage.ps3.lds zImage.lds
 
 quiet_cmd_bootcc = BOOTCC  $@
                empty.c zImage.coff.lds zImage.ps3.lds zImage.lds
 
 quiet_cmd_bootcc = BOOTCC  $@


@@ -114,6 +126,8 @@ quiet_cmd_bootas = BOOTAS  $@
 quiet_cmd_bootar = BOOTAR  $@
       cmd_bootar = $(CROSS32AR) -cr $@.$$$$ $(filter-out FORCE,$^); mv $@.$$$$ $@
 
 quiet_cmd_bootar = BOOTAR  $@
       cmd_bootar = $(CROSS32AR) -cr $@.$$$$ $(filter-out FORCE,$^); mv $@.$$$$ $@
 

+$(obj-libfdt): $(obj)/%.o: $(srctree)/scripts/dtc/libfdt/%.c FORCE
+       $(call if_changed_dep,bootcc)

 $(patsubst %.c,%.o, $(filter %.c, $(src-boot))): %.o: %.c FORCE
        $(Q)mkdir -p $(dir $@)
        $(call if_changed_dep,bootcc)
 $(patsubst %.c,%.o, $(filter %.c, $(src-boot))): %.o: %.c FORCE
        $(Q)mkdir -p $(dir $@)
        $(call if_changed_dep,bootcc)


@@ -124,7 +138,7 @@ $(patsubst %.S,%.o, $(filter %.S, $(src-boot))): %.o: %.S FORCE
 $(obj)/wrapper.a: $(obj-wlib) FORCE
        $(call if_changed,bootar)
 
 $(obj)/wrapper.a: $(obj-wlib) FORCE
        $(call if_changed,bootar)
 

-hostprogs-y    := addnote addRamDisk hack-coff mktree dtc
+hostprogs-y    := addnote addRamDisk hack-coff mktree

 
 targets                += $(patsubst $(obj)/%,%,$(obj-boot) wrapper.a)
 extra-y                := $(obj)/wrapper.a $(obj-plat) $(obj)/empty.o \
 
 targets                += $(patsubst $(obj)/%,%,$(obj-boot) wrapper.a)
 extra-y                := $(obj)/wrapper.a $(obj-plat) $(obj)/empty.o \


@@ -133,47 +147,10 @@ extra-y           := $(obj)/wrapper.a $(obj-plat) $(obj)/empty.o \
 dtstree                := $(srctree)/$(src)/dts
 
 wrapper                :=$(srctree)/$(src)/wrapper
 dtstree                := $(srctree)/$(src)/dts
 
 wrapper                :=$(srctree)/$(src)/wrapper

-wrapperbits    := $(extra-y) $(addprefix $(obj)/,addnote hack-coff mktree dtc) \
+wrapperbits    := $(extra-y) $(addprefix $(obj)/,addnote hack-coff mktree) \

                        $(wrapper) FORCE
 
 #############
                        $(wrapper) FORCE
 
 #############

-# Bits for building dtc
-# DTC_GENPARSER      := 1    # Uncomment to rebuild flex/bison output
-
-dtc-objs := dtc.o flattree.o fstree.o data.o livetree.o treesource.o srcpos.o checks.o
-dtc-objs += dtc-lexer.lex.o dtc-parser.tab.o
-dtc-objs := $(addprefix dtc-src/, $(dtc-objs))
-
-# prerequisites on generated files needs to be explicit
-$(obj)/dtc-src/dtc-parser.tab.o: $(obj)/dtc-src/dtc-parser.tab.c $(obj)/dtc-src/dtc-parser.tab.h
-$(obj)/dtc-src/dtc-lexer.lex.o:  $(obj)/dtc-src/dtc-lexer.lex.c $(obj)/dtc-src/dtc-parser.tab.h
-
-HOSTCFLAGS += -I$(src)/dtc-src/ -I$(src)/libfdt/
-
-targets += dtc-src/dtc-parser.tab.c
-targets += dtc-src/dtc-lexer.lex.c
-
-clean-files += dtc-src/dtc-parser.tab.h
-
-ifdef DTC_GENPARSER
-BISON = bison
-FLEX = flex
-
-quiet_cmd_bison = BISON   $@
-      cmd_bison = $(BISON) -o$@ -d $<; cp $@ $@_shipped
-quiet_cmd_flex = FLEX    $@
-      cmd_flex = $(FLEX) -o$@ $<; cp $@ $@_shipped
-
-$(obj)/dtc-src/dtc-parser.tab.c: $(src)/dtc-src/dtc-parser.y FORCE
-       $(call if_changed,bison)
-
-$(obj)/dtc-src/dtc-parser.tab.h: $(obj)/dtc-src/dtc-parser.tab.c
-
-$(obj)/dtc-src/dtc-lexer.lex.c: $(src)/dtc-src/dtc-lexer.l FORCE
-       $(call if_changed,flex)
-endif
-
-#############

 # Bits for building various flavours of zImage
 
 ifneq ($(CROSS32_COMPILE),)
 # Bits for building various flavours of zImage
 
 ifneq ($(CROSS32_COMPILE),)


@@ -347,8 +324,10 @@ $(obj)/treeImage.%: vmlinux $(obj)/%.dtb $(wrapperbits)
        $(call if_changed,wrap,treeboot-$*,,$(obj)/$*.dtb)
 
 # Rule to build device tree blobs
        $(call if_changed,wrap,treeboot-$*,,$(obj)/$*.dtb)
 
 # Rule to build device tree blobs

-$(obj)/%.dtb: $(dtstree)/%.dts $(obj)/dtc
-       $(obj)/dtc -O dtb -o $(obj)/$*.dtb -b 0 $(DTS_FLAGS) $(dtstree)/$*.dts
+DTC = $(objtree)/scripts/dtc/dtc
+
+$(obj)/%.dtb: $(dtstree)/%.dts
+       $(DTC) -O dtb -o $(obj)/$*.dtb -b 0 $(DTS_FLAGS) $(dtstree)/$*.dts

 
 # If there isn't a platform selected then just strip the vmlinux.
 ifeq (,$(image-y))
 
 # If there isn't a platform selected then just strip the vmlinux.
 ifeq (,$(image-y))

diff --git a/arch/powerpc/boot/simpleboot.c b/arch/powerpc/boot/simpleboot.c
index c58a0da..21cd480 100644 (file)
--- a/arch/powerpc/boot/simpleboot.c
+++ b/arch/powerpc/boot/simpleboot.c
@@ -19,7 +19,7 @@
 #include "types.h"
 #include "io.h"
 #include "stdio.h"
 #include "types.h"
 #include "io.h"
 #include "stdio.h"

-#include "libfdt/libfdt.h"
+#include <libfdt.h>

 
 BSS_STACK(4*1024);
 
 
 BSS_STACK(4*1024);
 

diff --git a/scripts/Makefile b/scripts/Makefile
index aafdf06..9dd5b25 100644 (file)
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -21,6 +21,7 @@ hostprogs-y += unifdef
 subdir-$(CONFIG_MODVERSIONS) += genksyms
 subdir-y                     += mod
 subdir-$(CONFIG_SECURITY_SELINUX) += selinux
 subdir-$(CONFIG_MODVERSIONS) += genksyms
 subdir-y                     += mod
 subdir-$(CONFIG_SECURITY_SELINUX) += selinux

+subdir-$(CONFIG_DTC)         += dtc

 
 # Let clean descend into subdirs
 subdir-        += basic kconfig package selinux
 
 # Let clean descend into subdirs
 subdir-        += basic kconfig package selinux

diff --git a/scripts/dtc/Makefile b/scripts/dtc/Makefile
new file mode 100644 (file)
index 0000000..01cdb36
--- /dev/null
+++ b/scripts/dtc/Makefile
@@ -0,0 +1,54 @@
+# scripts/dtc makefile
+
+hostprogs-y    := dtc
+always         := $(hostprogs-y)
+
+dtc-objs       := dtc.o flattree.o fstree.o data.o livetree.o treesource.o \
+                  srcpos.o checks.o
+dtc-objs       += dtc-lexer.lex.o dtc-parser.tab.o
+
+# Source files need to get at the userspace version of libfdt_env.h to compile
+
+HOSTCFLAGS_DTC := -I$(src) -I$(src)/libfdt
+
+HOSTCFLAGS_checks.o := $(HOSTCFLAGS_DTC)
+HOSTCFLAGS_data.o := $(HOSTCFLAGS_DTC)
+HOSTCFLAGS_dtc.o := $(HOSTCFLAGS_DTC)
+HOSTCFLAGS_flattree.o := $(HOSTCFLAGS_DTC)
+HOSTCFLAGS_fstree.o := $(HOSTCFLAGS_DTC)
+HOSTCFLAGS_livetree.o := $(HOSTCFLAGS_DTC)
+HOSTCFLAGS_srcpos.o := $(HOSTCFLAGS_DTC)
+HOSTCFLAGS_treesource.o := $(HOSTCFLAGS_DTC)
+
+HOSTCFLAGS_dtc-lexer.lex.o := $(HOSTCFLAGS_DTC)
+HOSTCFLAGS_dtc-parser.tab.o := $(HOSTCFLAGS_DTC)
+
+# dependencies on generated files need to be listed explicitly
+$(obj)/dtc-parser.tab.o: $(obj)/dtc-parser.tab.c $(obj)/dtc-parser.tab.h
+$(obj)/dtc-lexer.lex.o:  $(obj)/dtc-lexer.lex.c $(obj)/dtc-parser.tab.h
+
+targets += dtc-parser.tab.c dtc-lexer.lex.c
+
+clean-files += dtc-parser.tab.h
+
+# GENERATE_PARSER := 1         # Uncomment to rebuild flex/bison output
+
+ifdef GENERATE_PARSER
+
+BISON = bison
+FLEX = flex
+
+quiet_cmd_bison = BISON   $@
+      cmd_bison = $(BISON) -o$@ -d $<; cp $@ $@_shipped
+quiet_cmd_flex = FLEX    $@
+      cmd_flex = $(FLEX) -o$@ $<; cp $@ $@_shipped
+
+$(obj)/dtc-parser.tab.c: $(src)/dtc-parser.y FORCE
+        $(call if_changed,bison)
+
+$(obj)/dtc-parser.tab.h: $(obj)/dtc-parser.tab.c
+
+$(obj)/dtc-lexer.lex.c: $(src)/dtc-lexer.l FORCE
+        $(call if_changed,flex)
+
+endif

diff --git a/arch/powerpc/boot/dtc-src/Makefile.dtc b/scripts/dtc/Makefile.dtc
similarity index 100%
rename from arch/powerpc/boot/dtc-src/Makefile.dtc
rename to scripts/dtc/Makefile.dtc

diff --git a/arch/powerpc/boot/dtc-src/checks.c b/scripts/dtc/checks.c
similarity index 100%
rename from arch/powerpc/boot/dtc-src/checks.c
rename to scripts/dtc/checks.c

diff --git a/arch/powerpc/boot/dtc-src/data.c b/scripts/dtc/data.c
similarity index 100%
rename from arch/powerpc/boot/dtc-src/data.c
rename to scripts/dtc/data.c

diff --git a/arch/powerpc/boot/dtc-src/dtc-lexer.l b/scripts/dtc/dtc-lexer.l
similarity index 100%
rename from arch/powerpc/boot/dtc-src/dtc-lexer.l
rename to scripts/dtc/dtc-lexer.l

diff --git a/arch/powerpc/boot/dtc-src/dtc-lexer.lex.c_shipped b/scripts/dtc/dtc-lexer.lex.c_shipped
similarity index 100%
rename from arch/powerpc/boot/dtc-src/dtc-lexer.lex.c_shipped
rename to scripts/dtc/dtc-lexer.lex.c_shipped

diff --git a/arch/powerpc/boot/dtc-src/dtc-parser.tab.c_shipped b/scripts/dtc/dtc-parser.tab.c_shipped
similarity index 100%
rename from arch/powerpc/boot/dtc-src/dtc-parser.tab.c_shipped
rename to scripts/dtc/dtc-parser.tab.c_shipped

diff --git a/arch/powerpc/boot/dtc-src/dtc-parser.tab.h_shipped b/scripts/dtc/dtc-parser.tab.h_shipped
similarity index 100%
rename from arch/powerpc/boot/dtc-src/dtc-parser.tab.h_shipped
rename to scripts/dtc/dtc-parser.tab.h_shipped

diff --git a/arch/powerpc/boot/dtc-src/dtc-parser.y b/scripts/dtc/dtc-parser.y
similarity index 100%
rename from arch/powerpc/boot/dtc-src/dtc-parser.y
rename to scripts/dtc/dtc-parser.y

diff --git a/arch/powerpc/boot/dtc-src/dtc.c b/scripts/dtc/dtc.c
similarity index 100%
rename from arch/powerpc/boot/dtc-src/dtc.c
rename to scripts/dtc/dtc.c

diff --git a/arch/powerpc/boot/dtc-src/dtc.h b/scripts/dtc/dtc.h
similarity index 100%
rename from arch/powerpc/boot/dtc-src/dtc.h
rename to scripts/dtc/dtc.h

diff --git a/arch/powerpc/boot/dtc-src/flattree.c b/scripts/dtc/flattree.c
similarity index 100%
rename from arch/powerpc/boot/dtc-src/flattree.c
rename to scripts/dtc/flattree.c

diff --git a/arch/powerpc/boot/dtc-src/fstree.c b/scripts/dtc/fstree.c
similarity index 100%
rename from arch/powerpc/boot/dtc-src/fstree.c
rename to scripts/dtc/fstree.c

diff --git a/arch/powerpc/boot/libfdt/Makefile.libfdt b/scripts/dtc/libfdt/Makefile.libfdt
similarity index 100%
rename from arch/powerpc/boot/libfdt/Makefile.libfdt
rename to scripts/dtc/libfdt/Makefile.libfdt

diff --git a/arch/powerpc/boot/libfdt/fdt.c b/scripts/dtc/libfdt/fdt.c
similarity index 100%
rename from arch/powerpc/boot/libfdt/fdt.c
rename to scripts/dtc/libfdt/fdt.c

diff --git a/arch/powerpc/boot/libfdt/fdt.h b/scripts/dtc/libfdt/fdt.h
similarity index 100%
rename from arch/powerpc/boot/libfdt/fdt.h
rename to scripts/dtc/libfdt/fdt.h

diff --git a/arch/powerpc/boot/libfdt/fdt_ro.c b/scripts/dtc/libfdt/fdt_ro.c
similarity index 100%
rename from arch/powerpc/boot/libfdt/fdt_ro.c
rename to scripts/dtc/libfdt/fdt_ro.c

diff --git a/arch/powerpc/boot/libfdt/fdt_rw.c b/scripts/dtc/libfdt/fdt_rw.c
similarity index 100%
rename from arch/powerpc/boot/libfdt/fdt_rw.c
rename to scripts/dtc/libfdt/fdt_rw.c

diff --git a/arch/powerpc/boot/libfdt/fdt_strerror.c b/scripts/dtc/libfdt/fdt_strerror.c
similarity index 100%
rename from arch/powerpc/boot/libfdt/fdt_strerror.c
rename to scripts/dtc/libfdt/fdt_strerror.c

diff --git a/arch/powerpc/boot/libfdt/fdt_sw.c b/scripts/dtc/libfdt/fdt_sw.c
similarity index 100%
rename from arch/powerpc/boot/libfdt/fdt_sw.c
rename to scripts/dtc/libfdt/fdt_sw.c

diff --git a/arch/powerpc/boot/libfdt/fdt_wip.c b/scripts/dtc/libfdt/fdt_wip.c
similarity index 100%
rename from arch/powerpc/boot/libfdt/fdt_wip.c
rename to scripts/dtc/libfdt/fdt_wip.c

diff --git a/arch/powerpc/boot/libfdt/libfdt.h b/scripts/dtc/libfdt/libfdt.h
similarity index 100%
rename from arch/powerpc/boot/libfdt/libfdt.h
rename to scripts/dtc/libfdt/libfdt.h

diff --git a/arch/powerpc/boot/dtc-src/libfdt_env.h b/scripts/dtc/libfdt/libfdt_env.h
similarity index 100%
rename from arch/powerpc/boot/dtc-src/libfdt_env.h
rename to scripts/dtc/libfdt/libfdt_env.h

diff --git a/arch/powerpc/boot/libfdt/libfdt_internal.h b/scripts/dtc/libfdt/libfdt_internal.h
similarity index 100%
rename from arch/powerpc/boot/libfdt/libfdt_internal.h
rename to scripts/dtc/libfdt/libfdt_internal.h

diff --git a/arch/powerpc/boot/dtc-src/livetree.c b/scripts/dtc/livetree.c
similarity index 100%
rename from arch/powerpc/boot/dtc-src/livetree.c
rename to scripts/dtc/livetree.c

diff --git a/arch/powerpc/boot/dtc-src/srcpos.c b/scripts/dtc/srcpos.c
similarity index 100%
rename from arch/powerpc/boot/dtc-src/srcpos.c
rename to scripts/dtc/srcpos.c

diff --git a/arch/powerpc/boot/dtc-src/srcpos.h b/scripts/dtc/srcpos.h
similarity index 100%
rename from arch/powerpc/boot/dtc-src/srcpos.h
rename to scripts/dtc/srcpos.h

diff --git a/arch/powerpc/boot/dtc-src/treesource.c b/scripts/dtc/treesource.c
similarity index 100%
rename from arch/powerpc/boot/dtc-src/treesource.c
rename to scripts/dtc/treesource.c

diff --git a/arch/powerpc/boot/dtc-src/version_gen.h b/scripts/dtc/version_gen.h
similarity index 100%
rename from arch/powerpc/boot/dtc-src/version_gen.h
rename to scripts/dtc/version_gen.h