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@nbd.name>
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
18LOADADDR	:=
19LZMA_TEXT_START	:= 0x81000000
20LOADER_DATA	:=
21BOARD		:=
22FLASH_OFFS	:=
23FLASH_MAX	:=
24PLATFORM	:=
25CACHELINE_SIZE	:= 32
26
27CC		:= $(CROSS_COMPILE)gcc
28LD		:= $(CROSS_COMPILE)ld
29OBJCOPY		:= $(CROSS_COMPILE)objcopy
30OBJDUMP		:= $(CROSS_COMPILE)objdump
31
32BIN_FLAGS	:= -O binary -R .reginfo -R .note -R .comment -R .mdebug \
33		   -R .MIPS.abiflags -S
34
35CFLAGS		= -D__KERNEL__ -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
36		  -fno-strict-aliasing -fno-common -fomit-frame-pointer -G 0 \
37		  -mno-abicalls -fno-pic -ffunction-sections -pipe -mlong-calls \
38		  -fno-common -ffreestanding -fhonour-copts \
39		  -mabi=32 -march=mips32r2 \
40		  -Wa,-32 -Wa,-march=mips32r2 -Wa,-mips32r2 -Wa,--trap \
41		  -DCONFIG_CACHELINE_SIZE=$(CACHELINE_SIZE) \
42		  -DKERNEL_ADDR=$(KERNEL_ADDR)
43
44ASFLAGS		= $(CFLAGS) -D__ASSEMBLY__
45
46LDFLAGS		= -static --gc-sections -no-warn-mismatch
47LDFLAGS		+= -e startup -T loader.lds -Ttext $(LZMA_TEXT_START)
48
49O_FORMAT 	= $(shell $(OBJDUMP) -i | head -2 | grep elf32)
50
51OBJECTS		:= head.o
52
53all: head.o loader.bin
54
55# Don't build dependencies, this may die if $(CC) isn't gcc
56dep:
57
58install:
59
60%.o : %.c
61	$(CC) $(CFLAGS) -c -o $@ $<
62
63%.o : %.S
64	$(CC) $(ASFLAGS) -c -o $@ $<
65
66loader: $(OBJECTS)
67	$(LD) $(LDFLAGS) -o $@ $(OBJECTS)
68
69loader.bin: loader
70	$(OBJCOPY) $(BIN_FLAGS) $< $@
71
72mrproper: clean
73
74clean:
75	rm -f loader *.elf *.bin *.o
76