target/linux/brcm63xx/image/lzma-loader/src/Makefile

   1 #
   2 # Makefile for the LZMA compressed kernel loader for
   3 # Atheros AR7XXX/AR9XXX based boards
   4 #
   5 # Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
   6 #
   7 # Some parts of this file was based on the OpenWrt specific lzma-loader
   8 # for the BCM47xx and ADM5120 based boards:
   9 #       Copyright (C) 2004 Manuel Novoa III (mjn3@codepoet.org)
  10 #       Copyright (C) 2005 Mineharu Takahara <mtakahar@yahoo.com>
  11 #       Copyright (C) 2005 by Oleg I. Vdovikin <oleg@cs.msu.su>
  12 #
  13 # This program is free software; you can redistribute it and/or modify it
  14 # under the terms of the GNU General Public License version 2 as published
  15 # by the Free Software Foundation.
  16 #
  17
  18 LOADADDR        :=
  19 LZMA_TEXT_START := 0x80a00000
  20 LOADER_DATA     :=
  21
  22 CC              := $(CROSS_COMPILE)gcc
  23 LD              := $(CROSS_COMPILE)ld
  24 OBJCOPY         := $(CROSS_COMPILE)objcopy
  25 OBJDUMP         := $(CROSS_COMPILE)objdump
  26
  27 BIN_FLAGS       := -O binary -R .reginfo -R .note -R .comment -R .mdebug \
  28                    -R .MIPS.abiflags -S
  29
  30 CFLAGS          = -D__KERNEL__ -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
  31                   -fno-strict-aliasing -fno-common -fomit-frame-pointer -G 0 \
  32                   -mno-abicalls -fno-pic -ffunction-sections -pipe \
  33                   -ffreestanding -fhonour-copts \
  34                   -mabi=32 -march=mips32 \
  35                   -Wa,-32 -Wa,-march=mips32 -Wa,-mips32 -Wa,--trap
  36 CFLAGS          += -D_LZMA_PROB32
  37
  38 ASFLAGS         = $(CFLAGS) -D__ASSEMBLY__
  39
  40 LDFLAGS         = -static --gc-sections -no-warn-mismatch
  41 LDFLAGS         += -e startup -T loader.lds -Ttext $(LZMA_TEXT_START)
  42
  43 O_FORMAT        = $(shell $(OBJDUMP) -i | head -2 | grep elf32)
  44
  45 OBJECTS         := head.o loader.o cache.o board.o printf.o LzmaDecode.o
  46
  47 ifneq ($(strip $(LOADER_DATA)),)
  48 OBJECTS         += data.o
  49 CFLAGS          += -DLZMA_WRAPPER=1 -DLOADADDR=$(LOADADDR)
  50 endif
  51
  52
  53 all: loader.elf
  54
  55 # Don't build dependencies, this may die if $(CC) isn't gcc
  56 dep:
  57
  58 install:
  59
  60 %.o : %.c
  61         $(CC) $(CFLAGS) -c -o $@ $<
  62
  63 %.o : %.S
  64         $(CC) $(ASFLAGS) -c -o $@ $<
  65
  66 data.o: $(LOADER_DATA)
  67         $(LD) -r -b binary --oformat $(O_FORMAT) -T lzma-data.lds -o $@ $<
  68
  69 loader: $(OBJECTS)
  70         $(LD) $(LDFLAGS) -o $@ $(OBJECTS)
  71
  72 loader.bin: loader
  73         $(OBJCOPY) $(BIN_FLAGS) $< $@
  74
  75 loader2.o: loader.bin
  76         $(LD) -r -b binary --oformat $(O_FORMAT) -o $@ $<
  77
  78 loader.elf: loader2.o
  79         $(LD) -e startup -T loader2.lds -Ttext $(LOADADDR) -o $@ $<
  80
  81 mrproper: clean
  82
  83 clean:
  84         rm -f loader *.elf *.bin *.o
  85
  86
  87