2 # Makefile for the LZMA compressed kernel loader for
3 # Atheros AR7XXX/AR9XXX based boards
5 # Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
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>
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.
19 LZMA_TEXT_START
:= 0x80a00000
28 CC
:= $(CROSS_COMPILE
)gcc
29 LD
:= $(CROSS_COMPILE
)ld
30 OBJCOPY
:= $(CROSS_COMPILE
)objcopy
31 OBJDUMP
:= $(CROSS_COMPILE
)objdump
34 include $(PLATFORM
).mk
36 BIN_FLAGS
:= -O binary
-R .reginfo
-R .note
-R .comment
-R .mdebug \
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
47 CFLAGS
+= $(CACHE_FLAGS
)
49 ASFLAGS
= $(CFLAGS
) -D__ASSEMBLY__
51 LDFLAGS
= -static
-Wl
,--gc-sections
-Wl
,-no-warn-mismatch
52 LDFLAGS
+= -Wl
,-e
,startup
-T loader.lds
-Wl
,-Ttext
,$(LZMA_TEXT_START
)
53 LDFLAGS
+= -flto
-fwhole-program
-Wl
,-z
,max-page-size
=4096
55 O_FORMAT
= $(shell $(OBJDUMP
) -i | head
-2 | grep elf32
)
57 OBJECTS
:= head.o loader.o cache.o board-
$(PLATFORM
).o printf.o LzmaDecode.o
59 ifneq ($(strip $(LOADER_DATA
)),)
61 CFLAGS
+= -DLZMA_WRAPPER
=1 -DLOADADDR
=$(LOADADDR
)
64 ifneq ($(strip $(KERNEL_CMDLINE
)),)
65 CFLAGS
+= -DCONFIG_KERNEL_CMDLINE
='"$(KERNEL_CMDLINE)"'
68 ifneq ($(strip $(FLASH_START
)),)
69 CFLAGS
+= -DCONFIG_FLASH_START
=$(FLASH_START
)
72 ifneq ($(strip $(FLASH_OFFS
)),)
73 CFLAGS
+= -DCONFIG_FLASH_OFFS
=$(FLASH_OFFS
)
76 ifneq ($(strip $(FLASH_MAX
)),)
77 CFLAGS
+= -DCONFIG_FLASH_MAX
=$(FLASH_MAX
)
82 # Don't build dependencies, this may die if $(CC) isn't gcc
88 $(CC
) $(CFLAGS
) -c
-o
$@
$<
91 $(CC
) $(ASFLAGS
) -c
-o
$@
$<
93 data.o
: $(LOADER_DATA
)
94 $(LD
) -r
-b binary
--oformat
$(O_FORMAT
) -T lzma-data.lds
-o
$@
$<
97 $(CC
) $(CFLAGS
) $(LDFLAGS
) -o
$@
$(OBJECTS
)
100 $(OBJCOPY
) $(BIN_FLAGS
) $< $@
102 loader2.o
: loader.bin
103 $(LD
) -r
-b binary
--oformat
$(O_FORMAT
) -o
$@
$<
105 loader.elf
: loader2.o
106 $(LD
) -e startup
-T loader2.lds
-Ttext
$(LOADADDR
) -z max-page-size
=4096 -o
$@
$<
111 rm -f loader
*.elf
*.bin
*.o