1# 2# Copyright (C) 2006 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 = 0x00100000 # 1MB 9LOADADDR = 0x80400000 # RAM start + 4M 10KERNEL_ENTRY = 0x80001000 11IMAGE_COPY:=0 12 13CROSS_COMPILE = mips-linux- 14 15OBJCOPY:= $(CROSS_COMPILE)objcopy -O binary -R .reginfo -R .note -R .comment -R .mdebug -S 16CFLAGS := -fno-builtin -Os -G 0 -ffunction-sections -mno-abicalls -fno-pic -mabi=32 -march=mips32 -Wa,-32 -Wa,-march=mips32 -Wa,-mips32 -Wa,--trap -Wall -DRAMSTART=${RAMSTART} -DRAMSIZE=${RAMSIZE} -DKERNEL_ENTRY=${KERNEL_ENTRY} -D_LZMA_IN_CB 17ifeq ($(IMAGE_COPY),1) 18CFLAGS += -DLOADADDR=${LOADADDR} -DIMAGE_COPY=1 19endif 20 21.S.s: 22 $(CPP) $(CFLAGS) $< -o $*.s 23.S.o: 24 $(CC) $(CFLAGS) -c $< -o $*.o 25.c.o: 26 $(CC) $(CFLAGS) -c $< -o $*.o 27 28CC = $(CROSS_COMPILE)gcc 29LD = $(CROSS_COMPILE)ld 30OBJDUMP = $(CROSS_COMPILE)objdump 31 32O_FORMAT = $(shell $(OBJDUMP) -i | head -2 | grep elf32) 33 34# Drop some uninteresting sections in the kernel. 35# This is only relevant for ELF kernels but doesn't hurt a.out 36drop-sections = .reginfo .mdebug .comment 37strip-flags = $(addprefix --remove-section=,$(drop-sections)) 38 39all : lzma.elf lzma.bin 40 41lzma.lds: lzma.lds.in 42 sed -e 's,@LOADADDR@,$(LOADADDR),g' -e 's,@ENTRY@,_start,g' $< >$@ 43 44kernel.o: vmlinux.lzma lzma.lds 45 $(LD) -r -b binary --oformat $(O_FORMAT) -o $@ $< 46 47lzma.bin: lzma.elf 48 $(OBJCOPY) $< $@ 49 50ifeq ($(IMAGE_COPY),1) 51LOADER_ENTRY ?= $(KERNEL_ENTRY) 52lzma.o: decompress.o LzmaDecode.o kernel.o 53 sed -e 's,@LOADADDR@,$(LOADADDR),g' -e 's,@ENTRY@,entry,g' lzma.lds.in >lzma-stage2.lds 54 $(LD) -static --no-warn-mismatch -e entry -Tlzma-stage2.lds -o temp-$@ $^ 55 $(OBJCOPY) temp-$@ lzma.tmp 56 @echo "SECTIONS { .data : { code_start = .; *(.data) code_stop = .; }}" > lzma-data.lds 57 $(LD) -no-warn-mismatch -T lzma-data.lds -r -o $@ -b binary lzma.tmp --oformat $(O_FORMAT) 58 59lzma.elf: start.o lzma.o 60 sed -e 's,@LOADADDR@,$(LOADER_ENTRY),g' lzma-copy.lds.in >lzma-copy.lds 61 $(LD) -s -Tlzma-copy.lds -o $@ $^ 62else 63lzma.elf: start.o decompress.o LzmaDecode.o kernel.o 64 $(LD) -s -Tlzma.lds -o $@ $^ 65endif 66 67clean: 68 rm -f *.o lzma.elf lzma.bin *.tmp *.lds 69