target/linux/generic/image/relocate/Makefile

   1 #
   2 # Makefile for the kernel relocation stub for MIPS devices
   3 #
   4 # Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
   5 # Copyright (C) 2015 Felix Fietkau <nbd@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 := 0x81000000
  20 LOADER_DATA     :=
  21 BOARD           :=
  22 FLASH_OFFS      :=
  23 FLASH_MAX       :=
  24 PLATFORM        :=
  25 CACHELINE_SIZE  := 32
  26
  27 CC              := $(CROSS_COMPILE)gcc
  28 LD              := $(CROSS_COMPILE)ld
  29 OBJCOPY         := $(CROSS_COMPILE)objcopy
  30 OBJDUMP         := $(CROSS_COMPILE)objdump
  31
  32 BIN_FLAGS       := -O binary -R .reginfo -R .note -R .comment -R .mdebug -S
  33
  34 CFLAGS          = -D__KERNEL__ -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
  35                   -fno-strict-aliasing -fno-common -fomit-frame-pointer -G 0 \
  36                   -mno-abicalls -fno-pic -ffunction-sections -pipe -mlong-calls \
  37                   -fno-common -ffreestanding -fhonour-copts \
  38                   -mabi=32 -march=mips32r2 \
  39                   -Wa,-32 -Wa,-march=mips32r2 -Wa,-mips32r2 -Wa,--trap \
  40                   -DCONFIG_CACHELINE_SIZE=$(CACHELINE_SIZE) \
  41                   -DKERNEL_ADDR=$(KERNEL_ADDR)
  42
  43 ASFLAGS         = $(CFLAGS) -D__ASSEMBLY__
  44
  45 LDFLAGS         = -static --gc-sections -no-warn-mismatch
  46 LDFLAGS         += -e startup -T loader.lds -Ttext $(LZMA_TEXT_START)
  47
  48 O_FORMAT        = $(shell $(OBJDUMP) -i | head -2 | grep elf32)
  49
  50 OBJECTS         := head.o
  51
  52 all: head.o loader.bin
  53
  54 # Don't build dependencies, this may die if $(CC) isn't gcc
  55 dep:
  56
  57 install:
  58
  59 %.o : %.c
  60         $(CC) $(CFLAGS) -c -o $@ $<
  61
  62 %.o : %.S
  63         $(CC) $(ASFLAGS) -c -o $@ $<
  64
  65 loader: $(OBJECTS)
  66         $(LD) $(LDFLAGS) -o $@ $(OBJECTS)
  67
  68 loader.bin: loader
  69         $(OBJCOPY) $(BIN_FLAGS) $< $@
  70
  71 mrproper: clean
  72
  73 clean:
  74         rm -f loader *.elf *.bin *.o