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