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android_kernel_motorola_sm6225/arch/powerpc/boot/Makefile
Richard Purdie 4f3865fb57 [PATCH] zlib_inflate: Upgrade library code to a recent version 
Upgrade the zlib_inflate implementation in the kernel from a patched
version 1.1.3/4 to a patched 1.2.3.

The code in the kernel is about seven years old and I noticed that the
external zlib library's inflate performance was significantly faster (~50%)
than the code in the kernel on ARM (and faster again on x86_32).

For comparison the newer deflate code is 20% slower on ARM and 50% slower
on x86_32 but gives an approx 1% compression ratio improvement.  I don't
consider this to be an improvement for kernel use so have no plans to
change the zlib_deflate code.

Various changes have been made to the zlib code in the kernel, the most
significant being the extra functions/flush option used by ppp_deflate.
This update reimplements the features PPP needs to ensure it continues to
work.

This code has been tested on ARM under both JFFS2 (with zlib compression
enabled) and ppp_deflate and on x86_32.  JFFS2 sees an approx.  10% real
world file read speed improvement.

This patch also removes ZLIB_VERSION as it no longer has a correct value.
We don't need version checks anyway as the kernel's module handling will
take care of that for us.  This removal is also more in keeping with the
zlib author's wishes (http://www.zlib.net/zlib_faq.html#faq24) and I've
added something to the zlib.h header to note its a modified version.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Acked-by: Joern Engel <joern@wh.fh-wedel.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-22 15:05:58 -07:00

215 lines
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Makefile
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# Makefile for making ELF bootable images for booting on CHRP
# using Open Firmware.
#
# Geert Uytterhoeven September 1997
#
# Based on coffboot by Paul Mackerras
# Simplified for ppc64 by Todd Inglett
#
# NOTE: this code is built for 32 bit in ELF32 format even though
# it packages a 64 bit kernel. We do this to simplify the
# bootloader and increase compatibility with OpenFirmware.
#
# To this end we need to define BOOTCC, etc, as the tools
# needed to build the 32 bit image. These are normally HOSTCC,
# but may be a third compiler if, for example, you are cross
# compiling from an intel box. Once the 64bit ppc gcc is
# stable it will probably simply be a compiler switch to
# compile for 32bit mode.
# To make it easier to setup a cross compiler,
# CROSS32_COMPILE is setup as a prefix just like CROSS_COMPILE
# in the toplevel makefile.
HOSTCC := gcc
BOOTCFLAGS := $(HOSTCFLAGS) -fno-builtin -nostdinc -isystem \
$(shell $(CROSS32CC) -print-file-name=include) -fPIC
BOOTAFLAGS := -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional -nostdinc
OBJCOPYFLAGS := contents,alloc,load,readonly,data
OBJCOPY_COFF_ARGS := -O aixcoff-rs6000 --set-start 0x500000
OBJCOPY_MIB_ARGS := -O aixcoff-rs6000 -R .stab -R .stabstr -R .comment
zlib := inffast.c inflate.c inftrees.c
zlibheader := inffast.h inffixed.h inflate.h inftrees.h infutil.h
zliblinuxheader := zlib.h zconf.h zutil.h
$(addprefix $(obj)/,$(zlib) main.o): $(addprefix $(obj)/,$(zliblinuxheader)) $(addprefix $(obj)/,$(zlibheader))
#$(addprefix $(obj)/,main.o): $(addprefix $(obj)/,zlib.h)
src-boot := crt0.S string.S prom.c stdio.c main.c div64.S
src-boot += $(zlib)
src-boot := $(addprefix $(obj)/, $(src-boot))
obj-boot := $(addsuffix .o, $(basename $(src-boot)))
BOOTCFLAGS += -I$(obj) -I$(srctree)/$(obj)
quiet_cmd_copy_zlib = COPY $@
cmd_copy_zlib = sed "s@__attribute_used__@@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
quiet_cmd_copy_zlibheader = COPY $@
cmd_copy_zlibheader = sed "s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
# stddef.h for NULL
quiet_cmd_copy_zliblinuxheader = COPY $@
cmd_copy_zliblinuxheader = sed "s@<linux/string.h>@\"string.h\"@;s@<linux/kernel.h>@<stddef.h>@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
$(addprefix $(obj)/,$(zlib)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
$(call cmd,copy_zlib)
$(addprefix $(obj)/,$(zlibheader)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
$(call cmd,copy_zlibheader)
$(addprefix $(obj)/,$(zliblinuxheader)): $(obj)/%: $(srctree)/include/linux/%
$(call cmd,copy_zliblinuxheader)
clean-files := $(zlib) $(zlibheader) $(zliblinuxheader)
quiet_cmd_bootcc = BOOTCC $@
cmd_bootcc = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTCFLAGS) -c -o $@ $<
quiet_cmd_bootas = BOOTAS $@
cmd_bootas = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTAFLAGS) -c -o $@ $<
quiet_cmd_bootld = BOOTLD $@
cmd_bootld = $(CROSS32LD) -T $(srctree)/$(src)/$(3) -o $@ $(2)
$(patsubst %.c,%.o, $(filter %.c, $(src-boot))): %.o: %.c
$(call if_changed_dep,bootcc)
$(patsubst %.S,%.o, $(filter %.S, $(src-boot))): %.o: %.S
$(call if_changed_dep,bootas)
#-----------------------------------------------------------
# ELF sections within the zImage bootloader/wrapper
#-----------------------------------------------------------
required := vmlinux.strip
initrd := initrd
obj-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.o, $(section)))
src-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.c, $(section)))
gz-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.gz, $(section)))
hostprogs-y := addnote addRamDisk hack-coff
targets += zImage.vmode zImage.initrd.vmode zImage zImage.initrd \
zImage.coff zImage.initrd.coff miboot.image miboot.initrd.image \
$(patsubst $(obj)/%,%, $(call obj-sec, $(required) $(initrd))) \
$(patsubst $(obj)/%,%, $(call src-sec, $(required) $(initrd))) \
$(patsubst $(obj)/%,%, $(call gz-sec, $(required) $(initrd))) \
vmlinux.initrd dummy.o
extra-y := initrd.o
quiet_cmd_ramdisk = RAMDISK $@
cmd_ramdisk = $(obj)/addRamDisk $(obj)/ramdisk.image.gz $< $@
quiet_cmd_stripvm = STRIP $@
cmd_stripvm = $(STRIP) -s -R .comment $< -o $@
vmlinux.strip: vmlinux
$(call if_changed,stripvm)
$(obj)/vmlinux.initrd: vmlinux.strip $(obj)/addRamDisk $(obj)/ramdisk.image.gz
$(call if_changed,ramdisk)
quiet_cmd_addsection = ADDSEC $@
cmd_addsection = $(CROSS32OBJCOPY) $@ \
--add-section=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $@))=$(patsubst %.o,%.gz, $@) \
--set-section-flags=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $@))=$(OBJCOPYFLAGS)
quiet_cmd_addnote = ADDNOTE $@
cmd_addnote = $(obj)/addnote $@
quiet_cmd_gen-miboot = GEN $@
cmd_gen-miboot = $(OBJCOPY) $(OBJCOPY_MIB_ARGS) \
--add-section=$1=$(word 2, $^) $< $@
quiet_cmd_gencoff = COFF $@
cmd_gencoff = $(OBJCOPY) $(OBJCOPY_COFF_ARGS) $@ && \
$(obj)/hack-coff $@
$(call gz-sec, $(required)): $(obj)/kernel-%.gz: %
$(call if_changed,gzip)
$(obj)/kernel-initrd.gz: $(obj)/ramdisk.image.gz
cp -f $(obj)/ramdisk.image.gz $@
$(call src-sec, $(required) $(initrd)): $(obj)/kernel-%.c: $(obj)/kernel-%.gz
@touch $@
$(call obj-sec, $(required) $(initrd)): $(obj)/kernel-%.o: $(obj)/kernel-%.c
$(call if_changed_dep,bootcc)
$(call cmd,addsection)
$(obj)/zImage.vmode $(obj)/zImage.coff: obj-boot += $(call obj-sec, $(required))
$(obj)/zImage.vmode: $(call obj-sec, $(required)) $(obj-boot) $(srctree)/$(src)/zImage.lds
$(call cmd,bootld,$(obj-boot),zImage.lds)
$(obj)/zImage.initrd.vmode $(obj)/zImage.initrd.coff: obj-boot += $(call obj-sec, $(required) $(initrd))
$(obj)/zImage.initrd.vmode: $(call obj-sec, $(required) $(initrd)) $(obj-boot) $(srctree)/$(src)/zImage.lds
$(call cmd,bootld,$(obj-boot),zImage.lds)
# For 32-bit powermacs, build the COFF and miboot images
# as well as the ELF images.
coffimage-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/zImage.coff
coffrdimg-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/zImage.initrd.coff
mibootimg-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/miboot.image
mibrdimg-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/miboot.initrd.image
$(obj)/zImage: $(obj)/zImage.vmode $(obj)/addnote $(coffimage-y-y) \
$(mibootimg-y-y)
@cp -f $< $@
$(call if_changed,addnote)
$(obj)/zImage.initrd: $(obj)/zImage.initrd.vmode $(obj)/addnote \
$(coffrdimg-y-y) $(mibrdimg-y-y)
@cp -f $< $@
$(call if_changed,addnote)
$(obj)/zImage.coff: $(call obj-sec, $(required)) $(obj-boot) \
$(srctree)/$(src)/zImage.coff.lds $(obj)/hack-coff
$(call cmd,bootld,$(obj-boot),zImage.coff.lds)
$(call cmd,gencoff)
$(obj)/zImage.initrd.coff: $(call obj-sec, $(required) $(initrd)) $(obj-boot) \
$(srctree)/$(src)/zImage.coff.lds $(obj)/hack-coff
$(call cmd,bootld,$(obj-boot),zImage.coff.lds)
$(call cmd,gencoff)
$(obj)/miboot.image: $(obj)/dummy.o $(obj)/vmlinux.gz
$(call cmd,gen-miboot,image)
$(obj)/miboot.initrd.image: $(obj)/miboot.image $(images)/ramdisk.image.gz
$(call cmd,gen-miboot,initrd)
#-----------------------------------------------------------
# build u-boot images
#-----------------------------------------------------------
quiet_cmd_mygzip = GZIP $@
cmd_mygzip = gzip -f -9 < $< > $@.$$$$ && mv $@.$$$$ $@
quiet_cmd_objbin = OBJCOPY $@
cmd_objbin = $(OBJCOPY) -O binary $< $@
quiet_cmd_uimage = UIMAGE $@
cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A ppc -O linux -T kernel \
-C gzip -a 00000000 -e 00000000 -n 'Linux-$(KERNELRELEASE)' \
-d $< $@
MKIMAGE := $(srctree)/scripts/mkuboot.sh
targets += uImage
extra-y += vmlinux.bin vmlinux.gz
$(obj)/vmlinux.bin: vmlinux FORCE
$(call if_changed,objbin)
$(obj)/vmlinux.gz: $(obj)/vmlinux.bin FORCE
$(call if_changed,mygzip)
$(obj)/uImage: $(obj)/vmlinux.gz
$(Q)rm -f $@
$(call cmd,uimage)
@echo -n ' Image: $@ '
@if [ -f $@ ]; then echo 'is ready' ; else echo 'not made'; fi
install: $(CONFIGURE) $(BOOTIMAGE)
sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)" "$(BOOTIMAGE)"
clean-files += $(addprefix $(objtree)/, $(obj-boot) vmlinux.strip)
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