target/linux/lantiq/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 :=
  20 LOADER_DATA     :=
  21 KERNEL_MAGIC    :=
  22 BOARD           :=
  23 FLASH_START     :=
  24 FLASH_OFFS      :=
  25 FLASH_MAX       :=
  26 PLATFORM        :=
  27 CACHE_FLAGS     :=
  28
  29 CC              := $(CROSS_COMPILE)gcc
  30 LD              := $(CROSS_COMPILE)ld
  31 OBJCOPY         := $(CROSS_COMPILE)objcopy
  32 OBJDUMP         := $(CROSS_COMPILE)objdump
  33 include $(PLATFORM).mk
  34
  35 BIN_FLAGS       := -O binary -R .reginfo -R .note -R .comment -R .mdebug \
  36                    -R .MIPS.abiflags -S
  37
  38 CFLAGS          = -D__KERNEL__ -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
  39                   -fno-strict-aliasing -fno-common -fomit-frame-pointer -G 0 \
  40                   -mno-abicalls -fno-pic -ffunction-sections -pipe -mlong-calls \
  41                   -fno-common -ffreestanding -fhonour-copts -nostartfiles \
  42                   -mabi=32 -march=mips32r2 \
  43                   -Wa,-32 -Wa,-march=mips32r2 -Wa,-mips32r2 -Wa,--trap
  44 CFLAGS          += -D_LZMA_PROB32
  45 CFLAGS          += -DARCH=$(PLATFORM)
  46 CFLAGS          += -flto
  47
  48 ASFLAGS         = $(CFLAGS) -D__ASSEMBLY__
  49
  50 LDFLAGS         = -static -Wl,--gc-sections -Wl,-no-warn-mismatch
  51 LDFLAGS         += -Wl,-e,startup -T loader.lds -Wl,-Ttext,$(LZMA_TEXT_START)
  52 LDFLAGS         += -flto -fwhole-program
  53
  54 O_FORMAT        = $(shell $(OBJDUMP) -i | head -2 | grep elf32)
  55
  56 OBJECTS         := head.o loader.o cache.o board-$(PLATFORM).o printf.o LzmaDecode.o
  57
  58 include $(PLATFORM).mk
  59 CFLAGS+=$(CACHE_FLAGS)
  60 ASFLAGS+=$(CACHE_FLAGS)
  61
  62 ifneq ($(strip $(LOADER_DATA)),)
  63 OBJECTS         += data.o
  64 CFLAGS          += -DLZMA_WRAPPER=1 -DLOADADDR=$(LOADADDR)
  65 endif
  66
  67 ifneq ($(strip $(KERNEL_MAGIC)),)
  68 CFLAGS          += -DCONFIG_KERNEL_MAGIC=$(KERNEL_MAGIC)
  69 endif
  70
  71 ifneq ($(strip $(KERNEL_CMDLINE)),)
  72 CFLAGS          += -DCONFIG_KERNEL_CMDLINE='"$(KERNEL_CMDLINE)"'
  73 endif
  74
  75 ifneq ($(strip $(FLASH_START)),)
  76 CFLAGS          += -DCONFIG_FLASH_START=$(FLASH_START)
  77 endif
  78 ifneq ($(strip $(FLASH_OFFS)),)
  79 CFLAGS          += -DCONFIG_FLASH_OFFS=$(FLASH_OFFS)
  80 endif
  81
  82 ifneq ($(strip $(FLASH_MAX)),)
  83 CFLAGS          += -DCONFIG_FLASH_MAX=$(FLASH_MAX)
  84 endif
  85
  86 BOARD_DEF := $(shell echo $(strip $(BOARD)) | tr a-z A-Z | tr - _)
  87 ifneq ($(BOARD_DEF),)
  88 CFLAGS          += -DCONFIG_BOARD_$(BOARD_DEF)
  89 endif
  90
  91 all: loader.elf
  92
  93 # Don't build dependencies, this may die if $(CC) isn't gcc
  94 dep:
  95
  96 install:
  97
  98 %.o : %.c
  99         $(CC) $(CFLAGS) -c -o $@ $<
 100
 101 %.o : %.S
 102         $(CC) $(ASFLAGS) -c -o $@ $<
 103
 104 data.o: $(LOADER_DATA)
 105         $(LD) -r -b binary --oformat $(O_FORMAT) -T lzma-data.lds -o $@ $<
 106
 107 loader: $(OBJECTS)
 108         $(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(OBJECTS)
 109
 110 loader.bin: loader
 111         $(OBJCOPY) $(BIN_FLAGS) $< $@
 112
 113 loader2.o: loader.bin
 114         $(LD) -r -b binary --oformat $(O_FORMAT) -o $@ $<
 115
 116 loader.elf: loader2.o
 117         $(LD) -z max-page-size=0x1000 -e startup -T loader2.lds -Ttext $(LOADADDR) -o $@ $<
 118
 119 mrproper: clean
 120
 121 clean:
 122         rm -f loader *.elf *.bin *.o
 123
 124
 125