# 
# Copyright (C) 2006 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
include $(TOPDIR)/rules.mk
include $(INCLUDE_DIR)/image.mk

LOADADDR = 0x80010000		# RAM start + 16M 
KERNEL_ENTRY = $(LOADADDR)	# Newer kernels add a jmp to the kernel_entry at the start of the binary
RAMSIZE = 0x01000000		# 64MB

LOADER_MAKEOPTS= \
		KDIR=$(KDIR) \
		LOADADDR=$(LOADADDR) \
		KERNEL_ENTRY=$(KERNEL_ENTRY) \
		RAMSIZE=$(RAMSIZE)

define trxalign/jffs2-128k
-a 0x20000
endef
define trxalign/jffs2-64k
-a 0x10000
endef
define trxalign/squashfs
-a 1024
endef

define Image/Build/CFE
	# Generate the tagged image
	$(STAGING_DIR_HOST)/bin/imagetag -i $(KDIR)/vmlinux.lzma.cfe -f $(KDIR)/root.$(1) \
		-o $(BIN_DIR)/openwrt-$(2)-$(1)-cfe.bin \
		-b $(2) -c $(3) -e $(LOADADDR) -l $(LOADADDR)
#		-b $(2) -c $(3) -e $(KERNEL_ENTRY) -l $(LOADADDR)

	$(call prepare_generic_squashfs,$(BIN_DIR)/openwrt-$(2)-$(1)-cfe.bin)
endef

define Build/Clean
	$(MAKE) -C lzma-loader clean
endef

define Image/Prepare
	# Standard LZMA kernel
	cat $(KDIR)/vmlinux | $(STAGING_DIR_HOST)/bin/lzma e -si -so -eos -lc1 -lp2 -pb2 > $(KDIR)/vmlinux.lzma

	# CFE is a LZMA nazi! It took me hours to find out the parameters!
	# Also I think lzma has a bug cause it generates different output depending on
	# if you use stdin / stdout or not. Use files instead of stdio here, cause
	# otherwise CFE will complain and not boot the image.
	$(STAGING_DIR_HOST)/bin/lzma e -d22 -fb64 -a1 $(KDIR)/vmlinux $(KDIR)/vmlinux.lzma.tmp

	# Strip out the length, CFE doesn't like this
	dd if=$(KDIR)/vmlinux.lzma.tmp of=$(KDIR)/vmlinux.lzma.cfe bs=5 count=1
	dd if=$(KDIR)/vmlinux.lzma.tmp of=$(KDIR)/vmlinux.lzma.cfe ibs=13 obs=5 skip=1 seek=1 conv=notrunc
	rm -f $(KDIR)/vmlinux.lzma.tmp

	# Build the LZMA loader
	rm -f $(KDIR)/loader.gz
	$(MAKE) -C lzma-loader \
		BUILD_DIR="$(KDIR)" \
		TARGET="$(KDIR)" \
		clean install

	echo -ne "\\x00" >> $(KDIR)/loader.gz
	rm -f $(KDIR)/fs_mark
	touch $(KDIR)/fs_mark
	$(call prepare_generic_squashfs,$(KDIR)/fs_mark)

endef

define Image/Build
	$(STAGING_DIR_HOST)/bin/trx -o $(BIN_DIR)/openwrt-$(BOARD)-$(1).trx -f $(KDIR)/loader.gz -f $(KDIR)/vmlinux.lzma $(call trxalign/$(1)) -f $(KDIR)/root.$(1)
	$(call Image/Build/CFE,$(1),96345GW2,6345)
endef

$(eval $(call BuildImage))
