2 # Makefile for the LZMA compressed kernel loader for
3 # Atheros AR7XXX/AR9XXX based boards
5 # Copyright (C) 2020 Álvaro Fernández Rojas <noltari@gmail.com>
6 # Copyright (C) 2014 Jonas Gorski <jogo@openwrt.org>
7 # Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
9 # Some parts of this file was based on the OpenWrt specific lzma-loader
10 # for the BCM47xx and ADM5120 based boards:
11 # Copyright (C) 2004 Manuel Novoa III (mjn3@codepoet.org)
12 # Copyright (C) 2005 Mineharu Takahara <mtakahar@yahoo.com>
13 # Copyright (C) 2005 by Oleg I. Vdovikin <oleg@cs.msu.su>
15 # This program is free software; you can redistribute it and/or modify it
16 # under the terms of the GNU General Public License version 2 as published
17 # by the Free Software Foundation.
21 LZMA_TEXT_START := 0x80a00000
24 CC := $(CROSS_COMPILE)gcc
25 LD := $(CROSS_COMPILE)ld
26 OBJCOPY := $(CROSS_COMPILE)objcopy
27 OBJDUMP := $(CROSS_COMPILE)objdump
29 BIN_FLAGS := -O binary -R .reginfo -R .note -R .comment -R .mdebug \
32 CFLAGS = -D__KERNEL__ -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
33 -fno-strict-aliasing -fno-common -fomit-frame-pointer -G 0 \
34 -mno-abicalls -fno-pic -ffunction-sections -pipe \
35 -ffreestanding -fhonour-copts \
36 -mabi=32 -march=mips32 \
37 -Wa,-32 -Wa,-march=mips32 -Wa,-mips32 -Wa,--trap
38 CFLAGS += -D_LZMA_PROB32
39 CFLAGS += -DUART_BASE=$(UART_BASE)
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 $(OBJDUMP) -i | head -2 | grep elf32)
48 OBJECTS := head.o loader.o cache.o board.o printf.o LzmaDecode.o
50 ifneq ($(strip $(LOADER_DATA)),)
52 CFLAGS += -DLZMA_WRAPPER=1 -DLOADADDR=$(LOADADDR)
58 # Don't build dependencies, this may die if $(CC) isn't gcc
64 $(CC) $(CFLAGS) -c -o $@ $<
67 $(CC) $(ASFLAGS) -c -o $@ $<
69 data.o: $(LOADER_DATA)
70 $(LD) -r -b binary --oformat $(O_FORMAT) -T lzma-data.lds -o $@ $<
73 $(LD) $(LDFLAGS) -o $@ $(OBJECTS)
76 $(OBJCOPY) $(BIN_FLAGS) $< $@
79 $(LD) -r -b binary --oformat $(O_FORMAT) -o $@ $<
82 $(LD) -e startup -T loader2.lds -Ttext $(LOADADDR) -o $@ $<
87 rm -f loader *.elf *.bin *.o