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spl: make CONFIG_OF_EMBED pass dts through fdtgrep

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Building spl with CONFIG_OF_EMBED enabled results in an error message
on my board: "SPL image too big". This is because the fdtgrep build
step is only executed for CONFIG_OF_SEPARATE.

Fix this by moving the fdtgrep build step ('cmd_fdtgreo') from
scripts/Makefile.spl to dts/Makefile so that the reduced dtb is
available for all kinds of spl builds.

The resulting variable name for the embedded device tree blob changes,
too, which is why common.h and fdtdec.c have tiny changes.

Signed-off-by: Simon Goldschmidt <sgoldschmidt@de.pepperl-fuchs.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Goldschmidt Simon 2017-11-21 12:29:56 +00:00 committed by Tom Rini
parent 20188f519a
commit 9bd76b8076
4 changed files with 38 additions and 22 deletions
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35
dts/Makefile
View file

@ -22,10 +22,29 @@ DTB := $(ARCH_PATH)/$(DEVICE_TREE).dtb
dtb_depends += $(DTB:.dtb=.dts)
endif
# Pass the original device tree file through fdtgrep twice. The first pass
# removes any unwanted nodes (i.e. those which don't have the
# 'u-boot,dm-pre-reloc' property and thus are not needed by SPL. The second
# pass removes various unused properties from the remaining nodes.
# The output is typically a much smaller device tree file.
ifeq ($(CONFIG_TPL_BUILD),y)
fdtgrep_props := -b u-boot,dm-pre-reloc -b u-boot,dm-tpl
else
fdtgrep_props := -b u-boot,dm-pre-reloc -b u-boot,dm-spl
endif
quiet_cmd_fdtgrep = FDTGREP $@
cmd_fdtgrep = $(objtree)/tools/fdtgrep $(fdtgrep_props) -RT $< \
-n /chosen -n /config -O dtb | \
$(objtree)/tools/fdtgrep -r -O dtb - -o $@ \
$(addprefix -P ,$(subst $\",,$(CONFIG_OF_SPL_REMOVE_PROPS)))
$(obj)/dt-spl.dtb: $(DTB) $(objtree)/tools/fdtgrep FORCE
$(call if_changed,fdtgrep)
$(obj)/dt.dtb: $(DTB) FORCE
$(call if_changed,shipped)
targets += dt.dtb
targets += dt.dtb dt-spl.dtb
$(DTB): $(dtb_depends)
ifeq ($(EXT_DTB),)
@ -42,14 +61,22 @@ endif
arch-dtbs:
$(Q)$(MAKE) $(build)=$(ARCH_PATH) dtbs
.SECONDARY: $(obj)/dt.dtb.S
.SECONDARY: $(obj)/dt.dtb.S $(obj)/dt-spl.dtb.S
ifeq ($(CONFIG_SPL_BUILD),y)
obj-$(CONFIG_OF_EMBED) := dt-spl.dtb.o
# support "out-of-tree" build for dtb-spl
$(obj)/dt-spl.dtb.o: $(obj)/dt-spl.dtb.S FORCE
$(call if_changed_dep,as_o_S)
else
obj-$(CONFIG_OF_EMBED) := dt.dtb.o
endif
dtbs: $(obj)/dt.dtb
dtbs: $(obj)/dt.dtb $(obj)/dt-spl.dtb
@:
clean-files := dt.dtb.S
clean-files := dt.dtb.S dt-spl.dtb.S
# Let clean descend into dts directories
subdir- += ../arch/arm/dts ../arch/microblaze/dts ../arch/mips/dts ../arch/sandbox/dts ../arch/x86/dts

1
include/common.h
View file

@ -201,6 +201,7 @@ int last_stage_init(void);
extern ulong monitor_flash_len;
int mac_read_from_eeprom(void);
extern u8 __dtb_dt_begin[]; /* embedded device tree blob */
extern u8 __dtb_dt_spl_begin[]; /* embedded device tree blob for SPL/TPL */
int set_cpu_clk_info(void);
int mdm_init(void);
int print_cpuinfo(void);

4
lib/fdtdec.c
View file

@ -1268,7 +1268,11 @@ int fdtdec_setup(void)
# endif
# ifdef CONFIG_OF_EMBED
/* Get a pointer to the FDT */
# ifdef CONFIG_SPL_BUILD
gd->fdt_blob = __dtb_dt_spl_begin;
# else
gd->fdt_blob = __dtb_dt_begin;
# endif
# elif defined CONFIG_OF_SEPARATE
# ifdef CONFIG_SPL_BUILD
/* FDT is at end of BSS unless it is in a different memory region */

20
scripts/Makefile.spl
View file

@ -239,24 +239,8 @@ $(obj)/$(SPL_BIN)-pad.bin: $(obj)/$(SPL_BIN)
@bss_size_str=$(shell $(NM) $< | awk 'BEGIN {size = 0} /__bss_size/ {size = $$1} END {print "ibase=16; " toupper(size)}' | bc); \
dd if=/dev/zero of=$@ bs=1 count=$${bss_size_str} 2>/dev/null;
# Pass the original device tree file through fdtgrep twice. The first pass
# removes any unwanted nodes (i.e. those which don't have the
# 'u-boot,dm-pre-reloc' property and thus are not needed by SPL. The second
# pass removes various unused properties from the remaining nodes.
# The output is typically a much smaller device tree file.
ifeq ($(CONFIG_TPL_BUILD),y)
fdtgrep_props := -b u-boot,dm-pre-reloc -b u-boot,dm-tpl
else
fdtgrep_props := -b u-boot,dm-pre-reloc -b u-boot,dm-spl
endif
quiet_cmd_fdtgrep = FDTGREP $@
cmd_fdtgrep = $(objtree)/tools/fdtgrep $(fdtgrep_props) -RT $< \
-n /chosen -n /config -O dtb | \
$(objtree)/tools/fdtgrep -r -O dtb - -o $@ \
$(addprefix -P ,$(subst $\",,$(CONFIG_OF_SPL_REMOVE_PROPS)))
$(obj)/$(SPL_BIN).dtb: dts/dt.dtb $(objtree)/tools/fdtgrep FORCE
$(call if_changed,fdtgrep)
$(obj)/$(SPL_BIN).dtb: dts/dt-spl.dtb FORCE
$(call if_changed,copy)
pythonpath = PYTHONPATH=scripts/dtc/pylibfdt