mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-21 17:38:51 +09:00
![Mike Frysinger](/assets/img/avatar_default.png)
This creates a standalone ELF that executes just the Blackfin initcode. This is useful for people who want to program the low level aspects of the CPU (memory/clocks/etc...) and can easily be used with JTAG for quick booting while developing. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
77 lines
2.3 KiB
Makefile
77 lines
2.3 KiB
Makefile
#
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# U-boot - Makefile
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#
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# Copyright (c) 2005-2008 Analog Device Inc.
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#
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# (C) Copyright 2000-2006
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# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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#
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# Licensed under the GPL-2 or later.
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#
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include $(TOPDIR)/config.mk
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LIB = $(obj)lib$(CPU).o
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EXTRA := init.elf
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CEXTRA := initcode.o
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SEXTRA := start.o
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SOBJS := interrupt.o cache.o
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COBJS-$(CONFIG_BOOTCOUNT_LIMIT) += bootcount.o
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COBJS-y += cpu.o
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COBJS-y += gpio.o
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COBJS-y += interrupts.o
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COBJS-$(CONFIG_JTAG_CONSOLE) += jtag-console.o
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COBJS-y += os_log.o
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COBJS-y += reset.o
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COBJS-y += serial.o
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COBJS-y += traps.o
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COBJS-$(CONFIG_HW_WATCHDOG) += watchdog.o
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SRCS := $(SEXTRA:.o=.S) $(SOBJS:.o=.S) $(COBJS-y:.o=.c)
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OBJS := $(addprefix $(obj),$(COBJS-y) $(SOBJS))
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EXTRA := $(addprefix $(obj),$(EXTRA))
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CEXTRA := $(addprefix $(obj),$(CEXTRA))
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SEXTRA := $(addprefix $(obj),$(SEXTRA))
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all: $(obj).depend $(LIB) $(obj).depend $(EXTRA) $(CEXTRA) $(SEXTRA) check_initcode
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$(LIB): $(OBJS)
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$(call cmd_link_o_target, $(OBJS))
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$(OBJS): $(obj)bootrom-asm-offsets.h
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$(obj)bootrom-asm-offsets.c: bootrom-asm-offsets.c.in bootrom-asm-offsets.awk
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echo '#include <asm/mach-common/bits/bootrom.h>' | $(CPP) $(CPPFLAGS) - | gawk -f ./bootrom-asm-offsets.awk > $@.tmp
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mv $@.tmp $@
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$(obj)bootrom-asm-offsets.s: $(obj)bootrom-asm-offsets.c
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$(CC) $(CFLAGS) -S $^ -o $@.tmp
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mv $@.tmp $@
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$(obj)bootrom-asm-offsets.h: $(obj)bootrom-asm-offsets.s
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sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}" $^ > $@
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# make sure our initcode (which goes into LDR) does not
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# have relocs or external references
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$(obj)initcode.o: CFLAGS += -fno-function-sections -fno-data-sections
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READINIT = env LC_ALL=C $(CROSS_COMPILE)readelf -s $<
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check_initcode: $(obj)initcode.o
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ifneq ($(CONFIG_BFIN_BOOT_MODE),BFIN_BOOT_BYPASS)
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@if $(READINIT) | grep '\<GLOBAL\>.*\<UND\>' ; then \
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echo "$< contains external references!" 1>&2 ; \
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exit 1 ; \
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fi
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endif
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$(obj)init.lds: init.lds.S
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$(CPP) $(CPPFLAGS) $(LDPPFLAGS) -ansi -D__ASSEMBLY__ -P $^ -o $@
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$(obj)init.elf: $(obj)init.lds $(obj)init.o $(obj)initcode.o
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$(LD) $(LDFLAGS) -T $^ -o $@
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#########################################################################
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# defines $(obj).depend target
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include $(SRCTREE)/rules.mk
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sinclude $(obj).depend
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#########################################################################
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