2 # Makefile for the kernel relocation stub for MIPS devices
4 # Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
5 # Copyright (C) 2015 Felix Fietkau <nbd@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 := 0x81000000
27 CC := $(CROSS_COMPILE)gcc
28 LD := $(CROSS_COMPILE)ld
29 OBJCOPY := $(CROSS_COMPILE)objcopy
30 OBJDUMP := $(CROSS_COMPILE)objdump
32 BIN_FLAGS := -O binary -R .reginfo -R .note -R .comment -R .mdebug \
35 CFLAGS = -D__KERNEL__ -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
36 -fno-strict-aliasing -fno-common -fomit-frame-pointer -G 0 \
37 -mno-abicalls -fno-pic -ffunction-sections -pipe -mlong-calls \
38 -fno-common -ffreestanding -fhonour-copts \
39 -mabi=32 -march=mips32r2 \
40 -Wa,-32 -Wa,-march=mips32r2 -Wa,-mips32r2 -Wa,--trap \
41 -DCONFIG_CACHELINE_SIZE=$(CACHELINE_SIZE) \
42 -DKERNEL_ADDR=$(KERNEL_ADDR)
44 ASFLAGS = $(CFLAGS) -D__ASSEMBLY__
46 LDFLAGS = -static --gc-sections -no-warn-mismatch
47 LDFLAGS += -e startup -T loader.lds -Ttext $(LZMA_TEXT_START)
49 O_FORMAT = $(shell $(OBJDUMP) -i | head -2 | grep elf32)
53 all: head.o loader.bin
55 # Don't build dependencies, this may die if $(CC) isn't gcc
61 $(CC) $(CFLAGS) -c -o $@ $<
64 $(CC) $(ASFLAGS) -c -o $@ $<
67 $(LD) $(LDFLAGS) -o $@ $(OBJECTS)
70 $(OBJCOPY) $(BIN_FLAGS) $< $@
75 rm -f loader *.elf *.bin *.o