target/linux/ramips/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_START     :=
  23 FLASH_OFFS      :=
  24 FLASH_MAX       :=
  25 PLATFORM        :=
  26 CACHE_FLAGS     :=
  27
  28 CC              := $(CROSS_COMPILE)gcc
  29 LD              := $(CROSS_COMPILE)ld
  30 OBJCOPY         := $(CROSS_COMPILE)objcopy
  31 OBJDUMP         := $(CROSS_COMPILE)objdump
  32
  33
  34 include $(PLATFORM).mk
  35
  36 BIN_FLAGS       := -O binary -R .reginfo -R .note -R .comment -R .mdebug \
  37                    -R .MIPS.abiflags -S
  38
  39 CFLAGS          = -D__KERNEL__ -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
  40                   -fno-strict-aliasing -fno-common -fomit-frame-pointer -G 0 \
  41                   -mno-abicalls -fno-pic -ffunction-sections -pipe -mlong-calls \
  42                   -fno-common -ffreestanding -fhonour-copts -nostartfiles \
  43                   -mabi=32 -march=mips32r2 \
  44                   -Wa,-32 -Wa,-march=mips32r2 -Wa,-mips32r2 -Wa,--trap
  45 CFLAGS          += -D_LZMA_PROB32
  46 CFLAGS          += -flto
  47 CFLAGS          += $(CACHE_FLAGS)
  48
  49 ASFLAGS         = $(CFLAGS) -D__ASSEMBLY__
  50
  51 LDFLAGS         = -static -Wl,--gc-sections -Wl,-no-warn-mismatch
  52 LDFLAGS         += -Wl,-e,startup -T loader.lds -Wl,-Ttext,$(LZMA_TEXT_START)
  53 LDFLAGS         += -flto -fwhole-program -Wl,-z,max-page-size=4096
  54
  55 O_FORMAT        = $(shell $(OBJDUMP) -i | head -2 | grep elf32)
  56
  57 OBJECTS         := head.o loader.o cache.o board-$(PLATFORM).o printf.o LzmaDecode.o
  58
  59 ifneq ($(strip $(LOADER_DATA)),)
  60 OBJECTS         += data.o
  61 CFLAGS          += -DLZMA_WRAPPER=1 -DLOADADDR=$(LOADADDR)
  62 endif
  63
  64 ifneq ($(strip $(KERNEL_CMDLINE)),)
  65 CFLAGS          += -DCONFIG_KERNEL_CMDLINE='"$(KERNEL_CMDLINE)"'
  66 endif
  67
  68 ifneq ($(strip $(FLASH_START)),)
  69 CFLAGS          += -DCONFIG_FLASH_START=$(FLASH_START)
  70 endif
  71
  72 ifneq ($(strip $(FLASH_OFFS)),)
  73 CFLAGS          += -DCONFIG_FLASH_OFFS=$(FLASH_OFFS)
  74 endif
  75
  76 ifneq ($(strip $(FLASH_MAX)),)
  77 CFLAGS          += -DCONFIG_FLASH_MAX=$(FLASH_MAX)
  78 endif
  79
  80 all: loader.elf
  81
  82 # Don't build dependencies, this may die if $(CC) isn't gcc
  83 dep:
  84
  85 install:
  86
  87 %.o : %.c
  88         $(CC) $(CFLAGS) -c -o $@ $<
  89
  90 %.o : %.S
  91         $(CC) $(ASFLAGS) -c -o $@ $<
  92
  93 data.o: $(LOADER_DATA)
  94         $(LD) -r -b binary --oformat $(O_FORMAT) -T lzma-data.lds -o $@ $<
  95
  96 loader: $(OBJECTS)
  97         $(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(OBJECTS)
  98
  99 loader.bin: loader
 100         $(OBJCOPY) $(BIN_FLAGS) $< $@
 101
 102 loader2.o: loader.bin
 103         $(LD) -r -b binary --oformat $(O_FORMAT) -o $@ $<
 104
 105 loader.elf: loader2.o
 106         $(LD) -e startup -T loader2.lds -Ttext $(LOADADDR) -z max-page-size=4096 -o $@ $<
 107
 108 mrproper: clean
 109
 110 clean:
 111         rm -f loader *.elf *.bin *.o
 112
 113
 114