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Makefile: allow boards to check file size limits

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Boards often have a reserved size limit on the flash where they're stored.
Sometimes during upgrades or config changes, those limits are exceeded,
but no one notices until they try to upgrade and the limit screws things
up.  Either not enough of U-Boot is written to flash (and so the reboot
fails), or too much is written (and so things after it get clobbered).

So allow boards to declare a size limit (in bytes) and have the build
system check it while building.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2010-10-13 22:58:23 -04:00 committed by Wolfgang Denk
parent e9319f111d
commit f3a14d377e
1 changed files with 17 additions and 0 deletions
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17
Makefile
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@ -304,6 +304,21 @@ __LIBS := $(subst $(obj),,$(LIBS)) $(subst $(obj),,$(LIBBOARD))
#########################################################################
#########################################################################
ifneq ($(CONFIG_BOARD_SIZE_LIMIT),)
BOARD_SIZE_CHECK = \
@actual=`wc -c $@ | awk '{print $$1}'`; \
limit=$(CONFIG_BOARD_SIZE_LIMIT); \
if test $$actual -gt $$limit; then \
echo "$@ exceeds file size limit:"; \
echo " limit: $$limit bytes"; \
echo " actual: $$actual bytes"; \
echo " excess: $$((actual - limit)) bytes"; \
exit 1; \
fi
else
BOARD_SIZE_CHECK =
endif
# Always append ALL so that arch config.mk's can add custom ones
ALL += $(obj)u-boot.srec $(obj)u-boot.bin $(obj)System.map $(U_BOOT_NAND) $(U_BOOT_ONENAND)
@ -317,10 +332,12 @@ $(obj)u-boot.srec: $(obj)u-boot
$(obj)u-boot.bin: $(obj)u-boot
$(OBJCOPY) ${OBJCFLAGS} -O binary $< $@
$(BOARD_SIZE_CHECK)
$(obj)u-boot.ldr: $(obj)u-boot
$(CREATE_LDR_ENV)
$(LDR) -T $(CONFIG_BFIN_CPU) -c $@ $< $(LDR_FLAGS)
$(BOARD_SIZE_CHECK)
$(obj)u-boot.ldr.hex: $(obj)u-boot.ldr
$(OBJCOPY) ${OBJCFLAGS} -O ihex $< $@ -I binary