1#
2# Copyright (C) 2010 OpenWrt.org
3#
4# This is free software, licensed under the GNU General Public License v2.
5# See /LICENSE for more information.
6#
7RAMSTART	= 0x80000000
8RAMSIZE		= 0x00800000		# 8MB
9LOADADDR	= 0x80400000		# RAM start + 4M
10KERNEL_ENTRY	= 0x80002000
11
12CROSS_COMPILE = mipsel-openwrt-linux-
13
14OBJCOPY:= $(CROSS_COMPILE)objcopy -O binary -R .reginfo -R .note -R .comment -R .mdebug -S
15CFLAGS := -I./include -fno-builtin -Os -G 0 -ffunction-sections -mno-abicalls -fno-pic -mabi=32 -march=mips32 -Wa,-32 -Wa,-march=mips32 -Wa,-mips32 -Wa,--trap -Wall -DRAMSTART=${RAMSTART} -DRAMSIZE=${RAMSIZE} -DKERNEL_ENTRY=${KERNEL_ENTRY}
16
17.c.o:
18	$(CC) $(CFLAGS) -c $< -o $*.o
19
20CC =       $(CROSS_COMPILE)gcc
21LD =       $(CROSS_COMPILE)ld
22OBJDUMP =  $(CROSS_COMPILE)objdump
23
24O_FORMAT = $(shell $(OBJDUMP) -i | head -2 | grep elf32)
25
26# Drop some uninteresting sections in the kernel.
27# This is only relevant for ELF kernels but doesn't hurt a.out
28drop-sections   = .reginfo .mdebug .comment
29strip-flags     = $(addprefix --remove-section=,$(drop-sections))
30
31all : lzma.elf lzma.bin
32
33lzma.lds: lzma.lds.in
34	sed -e 's,@LOADADDR@,$(LOADADDR),g' $< >$@
35
36kernel.o: vmlinux.lzma lzma.lds
37	$(LD) -r -b binary --oformat $(O_FORMAT) -o $@ $<
38
39lzma.bin: lzma.elf
40	$(OBJCOPY) $< $@
41
42lzma.elf: decompress.o stubs.o LzmaDecode.o kernel.o lzma.lds
43	$(LD) -T lzma.lds -o $@ $^
44#-s ^
45
46clean:
47	rm -f *.o lzma.elf lzma.bin *.tmp *.lds
48