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
26 CC := $(CROSS_COMPILE)gcc
27 LD := $(CROSS_COMPILE)ld
28 OBJCOPY := $(CROSS_COMPILE)objcopy
29 OBJDUMP := $(CROSS_COMPILE)objdump
31 BIN_FLAGS := -O binary -R .reginfo -R .note -R .comment -R .mdebug -S
33 CFLAGS = -D__KERNEL__ -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
34 -fno-strict-aliasing -fno-common -fomit-frame-pointer -G 0 \
35 -mno-abicalls -fno-pic -ffunction-sections -pipe -mlong-calls \
36 -fno-common -ffreestanding -fhonour-copts \
37 -mabi=32 -march=mips32r2 \
38 -Wa,-32 -Wa,-march=mips32r2 -Wa,-mips32r2 -Wa,--trap \
39 -DCONFIG_CACHELINE_SIZE=32 -DKERNEL_ADDR=$(KERNEL_ADDR)
41 ASFLAGS = $(CFLAGS) -D__ASSEMBLY__
43 LDFLAGS = -static --gc-sections -no-warn-mismatch
44 LDFLAGS += -e startup -T loader.lds -Ttext $(LZMA_TEXT_START)
46 O_FORMAT = $(shell $(OBJDUMP) -i | head -2 | grep elf32)
50 all: head.o loader.bin
52 # Don't build dependencies, this may die if $(CC) isn't gcc
58 $(CC) $(CFLAGS) -c -o $@ $<
61 $(CC) $(ASFLAGS) -c -o $@ $<
64 $(LD) $(LDFLAGS) -o $@ $(OBJECTS)
67 $(OBJCOPY) $(BIN_FLAGS) $< $@
72 rm -f loader *.elf *.bin *.o