build a compressed kernel image to use with i386 bootloaders

[openwrt.git] / openwrt / target / linux / image / ar7 / Makefile

diff --git a/openwrt/target/linux/image/ar7/Makefile b/openwrt/target/linux/image/ar7/Makefile
index b2683db..1d1aea7 100644 (file)
--- a/openwrt/target/linux/image/ar7/Makefile
+++ b/openwrt/target/linux/image/ar7/Makefile
@@ -5,13 +5,14 @@ KDIR:=$(BUILD_DIR)/linux-$(KERNEL)-ar7
 PKG_BUILD_DIR:=$(BUILD_DIR)/ar7loader
 
 LOADADDR := 0x94020000
+KERNEL_ENTRY := 0x${shell nm $(KDIR)/linux-$(KERNEL)*/vmlinux | grep kernel_entry | cut -d' ' -f1}
 OUTPUT_FORMAT := elf32-tradlittlemips
 
 CFLAGS := -D__KERNEL__ -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
        -fno-strict-aliasing -fno-common -fomit-frame-pointer -G 0 -mno-abicalls -fno-pic \
        -pipe -mlong-calls -fno-common \
        -mabi=32 -march=mips32 -Wa,-32 -Wa,-march=mips32 -Wa,-mips32 -Wa,--trap \
-
+       -DLOADADDR=$(LOADADDR)
 
 $(PKG_BUILD_DIR):
        mkdir -p $(PKG_BUILD_DIR)
@@ -24,6 +25,9 @@ $(PKG_BUILD_DIR)/ld.script: src/ld.script.in
        sed -e 's/@@OUTPUT_FORMAT@@/$(OUTPUT_FORMAT)/' \
            -e 's/@@LOADADDR@@/$(LOADADDR)/' <$< >$@
 
+$(PKG_BUILD_DIR)/LzmaDecode.o: src/LzmaDecode.c
+       $(TARGET_CC) $(CFLAGS) -c -o $@ $<
+
 $(PKG_BUILD_DIR)/loader.o: src/loader.c
        $(TARGET_CC) $(CFLAGS) -c -o $@ $<
 
@@ -33,36 +37,48 @@ $(PKG_BUILD_DIR)/srec2bin: src/srec2bin.c
 $(KDIR)/vmlinux.gz: $(KDIR)/vmlinux
        gzip -c -vf9 < $< > $@
 
-$(BIN_DIR)/openwrt-ar7-zimage.bin: $(KDIR)/vmlinux.gz compile
+$(KDIR)/vmlinux.lzma: $(KDIR)/vmlinux
+       cat $^ | $(STAGING_DIR)/bin/lzma e -si -so -eos -lc1 -lp2 -pb2 > $@ || (rm -f $@ && false)
+
+$(BIN_DIR)/openwrt-ar7-2.4-kernel.bin: $(KDIR)/vmlinux.lzma compile
        $(TARGET_CROSS)ld -T $(PKG_BUILD_DIR)/zimage.script -r -b binary $< -o $(KDIR)/zimage.o
-       $(TARGET_CROSS)ld -static -G 0 -no-warn-mismatch -R $(KDIR)/linux-$(KERNEL)*/vmlinux -T $(PKG_BUILD_DIR)/ld.script \
+       $(TARGET_CROSS)ld -static -G 0 --defsym kernel_entry=$(KERNEL_ENTRY) -T $(PKG_BUILD_DIR)/ld.script \
                $(PKG_BUILD_DIR)/loader.o \
+               $(PKG_BUILD_DIR)/LzmaDecode.o \
                $(KDIR)/zimage.o \
                -o $(KDIR)/loader
        $(TARGET_CROSS)objcopy -O srec $(KDIR)/loader $(KDIR)/ram_zimage.sre
        $(PKG_BUILD_DIR)/srec2bin $(KDIR)/ram_zimage.sre $@
 
-$(BIN_DIR)/openwrt-ar7-$(KERNEL)-$(FS).bin:
-       dd if=$(BIN_DIR)/openwrt-ar7-zimage.bin of=$@ bs=786432 conv=sync
+ifeq ($(FS),jffs2-8MB)
+ALIGN:=bs=131072 conv=sync
+endif
+ifeq ($(FS),jffs2-4MB)
+ALIGN:=bs=65536 conv=sync
+endif
+
+$(BIN_DIR)/openwrt-ar7-$(KERNEL)-$(FS).bin: $(BIN_DIR)/openwrt-ar7-2.4-kernel.bin
+       dd if=$< $(ALIGN) > $@
        cat $(BUILD_DIR)/linux-$(KERNEL)-ar7/root.$(FS) >> $@
 
 define pattern_template
 $(BIN_DIR)/openwrt-ar7-$(KERNEL)-$(FS)-$(1).bin: $(BIN_DIR)/openwrt-ar7-$(KERNEL)-$(FS).bin
        (dd if=/dev/zero bs=16 count=1; cat $(BIN_DIR)/openwrt-ar7-$(KERNEL)-$(FS).bin) | \
-               $(STAGING_DIR)/bin/addpattern -p $(1) -o $(BIN_DIR)/openwrt-ar7-$(KERNEL)-$(FS)-$(1).bin
-       
+               $(STAGING_DIR)/bin/addpattern -p $(1) $(2) -o $(BIN_DIR)/openwrt-ar7-$(KERNEL)-$(FS)-$(1).bin
+
 install: $(BIN_DIR)/openwrt-ar7-$(KERNEL)-$(FS)-$(1).bin
 endef
 
 $(eval $(call pattern_template,WA22))
 $(eval $(call pattern_template,WAG2))
 $(eval $(call pattern_template,WA21))
+$(eval $(call pattern_template,WA32,-b))
 
 clean:
        rm -rf $(PKG_BUILD_DIR)
        rm -f $(BIN_DIR)/openwrt-ar7*
 
 prepare: $(PKG_BUILD_DIR) $(PKG_BUILD_DIR)/zimage.script $(PKG_BUILD_DIR)/ld.script
-compile: prepare $(PKG_BUILD_DIR)/loader.o $(PKG_BUILD_DIR)/srec2bin
-install: $(BIN_DIR)/openwrt-ar7-zimage.bin $(BIN_DIR)/openwrt-ar7-$(KERNEL)-$(FS).bin
-       
+compile: prepare $(PKG_BUILD_DIR)/loader.o $(PKG_BUILD_DIR)/LzmaDecode.o $(PKG_BUILD_DIR)/srec2bin
+install: $(BIN_DIR)/openwrt-ar7-2.4-kernel.bin $(BIN_DIR)/openwrt-ar7-$(KERNEL)-$(FS).bin
+