From f3a14d377e2fb4e48026810fbf67e189a5e5f515 Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier@gentoo.org>
Date: Wed, 13 Oct 2010 22:58:23 -0400
Subject: [PATCH] Makefile: allow boards to check file size limits
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>
---
Makefile | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/Makefile b/Makefile
index 30a564d3cb..e9c069d3fa 100644
--- a/Makefile
+++ b/Makefile
@@ -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
--
2.39.5