target/linux/ar71xx/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 BOARD           :=
  22 FLASH_OFFS      :=
  23 FLASH_MAX       :=
  24
  25 CC              := $(CROSS_COMPILE)gcc
  26 LD              := $(CROSS_COMPILE)ld
  27 OBJCOPY         := $(CROSS_COMPILE)objcopy
  28 OBJDUMP         := $(CROSS_COMPILE)objdump
  29
  30 BIN_FLAGS       := -O binary -R .reginfo -R .note -R .comment -R .mdebug -S
  31
  32 CFLAGS          = -D__KERNEL__ -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
  33                   -fno-strict-aliasing -fno-common -fomit-frame-pointer -G 0 \
  34                   -mno-abicalls -fno-pic -ffunction-sections -pipe -mlong-calls \
  35                   -fno-common -ffreestanding -fhonour-copts \
  36                   -mabi=32 -march=mips32r2 \
  37                   -Wa,-32 -Wa,-march=mips32r2 -Wa,-mips32r2 -Wa,--trap
  38 CFLAGS          += -D_LZMA_PROB32
  39
  40 ASFLAGS         = $(CFLAGS) -D__ASSEMBLY__
  41
  42 LDFLAGS         = -static --gc-sections -no-warn-mismatch
  43 LDFLAGS         += -e startup -T loader.lds -Ttext $(LZMA_TEXT_START)
  44
  45 O_FORMAT        = $(shell $(OBJDUMP) -i | head -2 | grep elf32)
  46
  47 OBJECTS         := head.o loader.o cache.o board.o printf.o LzmaDecode.o
  48
  49 ifneq ($(strip $(LOADER_DATA)),)
  50 OBJECTS         += data.o
  51 CFLAGS          += -DLZMA_WRAPPER=1 -DLOADADDR=$(LOADADDR)
  52 endif
  53
  54 ifneq ($(strip $(KERNEL_CMDLINE)),)
  55 CFLAGS          += -DCONFIG_KERNEL_CMDLINE='"$(KERNEL_CMDLINE)"'
  56 endif
  57
  58 ifneq ($(strip $(FLASH_OFFS)),)
  59 CFLAGS          += -DCONFIG_FLASH_OFFS=$(FLASH_OFFS)
  60 endif
  61
  62 ifneq ($(strip $(FLASH_MAX)),)
  63 CFLAGS          += -DCONFIG_FLASH_MAX=$(FLASH_MAX)
  64 endif
  65
  66 BOARD_DEF := $(shell echo $(strip $(BOARD)) | tr a-z A-Z | tr - _)
  67 ifneq ($(BOARD_DEF),)
  68 CFLAGS          += -DCONFIG_BOARD_$(BOARD_DEF)
  69 endif
  70
  71 all: loader.elf
  72
  73 # Don't build dependencies, this may die if $(CC) isn't gcc
  74 dep:
  75
  76 install:
  77
  78 %.o : %.c
  79         $(CC) $(CFLAGS) -c -o $@ $<
  80
  81 %.o : %.S
  82         $(CC) $(ASFLAGS) -c -o $@ $<
  83
  84 data.o: $(LOADER_DATA)
  85         $(LD) -r -b binary --oformat $(O_FORMAT) -T lzma-data.lds -o $@ $<
  86
  87 loader: $(OBJECTS)
  88         $(LD) $(LDFLAGS) -o $@ $(OBJECTS)
  89
  90 loader.bin: loader
  91         $(OBJCOPY) $(BIN_FLAGS) $< $@
  92
  93 loader2.o: loader.bin
  94         $(LD) -r -b binary --oformat $(O_FORMAT) -o $@ $<
  95
  96 loader.elf: loader2.o
  97         $(LD) -e startup -T loader2.lds -Ttext $(LOADADDR) -o $@ $<
  98
  99 mrproper: clean
 100
 101 clean:
 102         rm -f loader *.elf *.bin *.o
 103
 104
 105