ar71xx: image: allow to use board specific code in the lzma-loader
[openwrt/svn-archive/archive.git] / 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.bin
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.bin: loader.elf
88 $(OBJCOPY) $(BIN_FLAGS) $< $@
89
90 loader.elf: $(OBJECTS)
91 $(LD) $(LDFLAGS) -o $@ $(OBJECTS)
92
93 mrproper: clean
94
95 clean:
96 rm -f *.elf *.bin *.o
97
98
99