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#
# Makefile for the LZMA compressed kernel loader for
# Atheros AR7XXX/AR9XXX based boards
#
# Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
#
# Some parts of this file was based on the OpenWrt specific lzma-loader
# for the BCM47xx and ADM5120 based boards:
# Copyright (C) 2004 Manuel Novoa III (mjn3@codepoet.org)
# Copyright (C) 2005 Mineharu Takahara <mtakahar@yahoo.com>
# Copyright (C) 2005 by Oleg I. Vdovikin <oleg@cs.msu.su>
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 2 as published
# by the Free Software Foundation.
#
LOADADDR :=
LZMA_TEXT_START := 0x80a00000
LOADER_DATA :=
BOARD :=
FLASH_OFFS :=
FLASH_MAX :=
CC := $(CROSS_COMPILE)gcc
LD := $(CROSS_COMPILE)ld
OBJCOPY := $(CROSS_COMPILE)objcopy
OBJDUMP := $(CROSS_COMPILE)objdump
BIN_FLAGS := -O binary -R .reginfo -R .note -R .comment -R .mdebug \
-R .MIPS.abiflags -S
CFLAGS = -D__KERNEL__ -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
-fno-strict-aliasing -fno-common -fomit-frame-pointer -G 0 \
-mno-abicalls -fno-pic -ffunction-sections -pipe -mlong-calls \
-fno-common -ffreestanding -fhonour-copts -nostartfiles \
-mabi=32 -march=mips32r2 \
-Wa,-32 -Wa,-march=mips32r2 -Wa,-mips32r2 -Wa,--trap
CFLAGS += -D_LZMA_PROB32
CFLAGS += -flto
ASFLAGS = $(CFLAGS) -D__ASSEMBLY__
LDFLAGS = -static -Wl,--gc-sections -Wl,-no-warn-mismatch
LDFLAGS += -Wl,-e,startup -T loader.lds -Wl,-Ttext,$(LZMA_TEXT_START)
LDFLAGS += -flto -fwhole-program
O_FORMAT = $(shell $(OBJDUMP) -i | head -2 | grep elf32)
OBJECTS := head.o loader.o cache.o board.o printf.o LzmaDecode.o
ifneq ($(strip $(LOADER_DATA)),)
OBJECTS += data.o
CFLAGS += -DLZMA_WRAPPER=1 -DLOADADDR=$(LOADADDR)
endif
ifneq ($(strip $(KERNEL_CMDLINE)),)
CFLAGS += -DCONFIG_KERNEL_CMDLINE='"$(KERNEL_CMDLINE)"'
endif
ifneq ($(strip $(FLASH_OFFS)),)
CFLAGS += -DCONFIG_FLASH_OFFS=$(FLASH_OFFS)
endif
ifneq ($(strip $(FLASH_MAX)),)
CFLAGS += -DCONFIG_FLASH_MAX=$(FLASH_MAX)
endif
BOARD_DEF := $(shell echo $(strip $(BOARD)) | tr a-z A-Z | tr - _)
ifneq ($(BOARD_DEF),)
CFLAGS += -DCONFIG_BOARD_$(BOARD_DEF)
endif
all: loader.elf
# Don't build dependencies, this may die if $(CC) isn't gcc
dep:
install:
%.o : %.c
$(CC) $(CFLAGS) -c -o $@ $<
%.o : %.S
$(CC) $(ASFLAGS) -c -o $@ $<
data.o: $(LOADER_DATA)
$(LD) -r -b binary --oformat $(O_FORMAT) -T lzma-data.lds -o $@ $<
loader: $(OBJECTS)
$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(OBJECTS)
loader.bin: loader
$(OBJCOPY) $(BIN_FLAGS) $< $@
loader2.o: loader.bin
$(LD) -r -b binary --oformat $(O_FORMAT) -o $@ $<
loader.elf: loader2.o
$(LD) -z max-page-size=0x1000 -e startup -T loader2.lds -Ttext $(LOADADDR) -o $@ $<
mrproper: clean
clean:
rm -f loader *.elf *.bin *.o
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