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#
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# Copyright (C) 2006 Martin Decky
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# - Redistributions of source code must retain the above copyright
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#   notice, this list of conditions and the following disclaimer.
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# - Redistributions in binary form must reproduce the above copyright
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#   notice, this list of conditions and the following disclaimer in the
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#   documentation and/or other materials provided with the distribution.
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# - The name of the author may not be used to endorse or promote products
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#   derived from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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## Toolchain configuration
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#
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TARGET = ppc-linux-gnu
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TOOLCHAIN_DIR = /usr/local/ppc/bin
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ifeq ($(COMPILER),native)
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	CC = gcc
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	AS = as
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	LD = ld
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	OBJCOPY = objcopy
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	OBJDUMP = objdump
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else
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	CC = $(TOOLCHAIN_DIR)/$(TARGET)-gcc
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	AS = $(TOOLCHAIN_DIR)/$(TARGET)-as
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	LD = $(TOOLCHAIN_DIR)/$(TARGET)-ld
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	OBJCOPY = $(TOOLCHAIN_DIR)/$(TARGET)-objcopy
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	OBJDUMP = $(TOOLCHAIN_DIR)/$(TARGET)-objdump
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endif
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CFLAGS = -nostdinc -nostdlib -fno-builtin -Werror-implicit-function-declaration -Wmissing-prototypes -Werror -O3 -mcpu=powerpc -m32
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DEFS =
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SOURCES = \
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	main.c \
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	ofw.c \
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	printf.c \
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	asm.S \
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	boot.S
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OBJECTS := $(addsuffix .o,$(basename $(SOURCES)))
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.PHONY: all clean depend
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all: image.boot
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-include Makefile.depend
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image.boot: depend $(OBJECTS) kernel.o
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	$(LD) -no-check-sections -N -T _link.ld $(OBJECTS) kernel.o -o $@
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depend:
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	-makedepend $(DEFS) $(CFLAGS) -f - $(SOURCES) > Makefile.depend 2> /dev/null
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clean:
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	-rm -f $(OBJECTS) image.boot kernel.o Makefile.depend
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kernel.o: $(KERNEL)
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	$(OBJCOPY) -I binary -O elf32-powerpc -B powerpc:common --rename-section .data=.image $(KERNEL) $@
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%.o: %.S
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	$(CC) $(DEFS) $(CFLAGS) -D__ASM__ -c $< -o $@
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%.o: %.c
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	$(CC) $(DEFS) $(CFLAGS) -c $< -o $@