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| author | Simon Glass <sjg@chromium.org> | 2015-06-23 15:38:29 -0600 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-07-21 17:39:21 -0600 |
| commit | fa78e0a37173211d75e9606257bc028f066962cf (patch) | |
| tree | 51df2d7c98c352953586bbb29885177e08bb80dc /scripts | |
| parent | 1043d0a0296a8580fd497a2eb1f411eb07ba98c1 (diff) | |
| download | u-boot-imx-fa78e0a37173211d75e9606257bc028f066962cf.zip u-boot-imx-fa78e0a37173211d75e9606257bc028f066962cf.tar.gz u-boot-imx-fa78e0a37173211d75e9606257bc028f066962cf.tar.bz2 | |
dm: Reduce SPL device tree size
The SPL device tree size must be minimised to save memory. Only include
properties that are needed by SPL - this is determined by the presence
of the "u-boot,dm-pre-reloc" property. Also remove a predefined list of
unused properties from the nodes that remain.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/Makefile.spl | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/scripts/Makefile.spl b/scripts/Makefile.spl index fd572f4..bcc7ca2 100644 --- a/scripts/Makefile.spl +++ b/scripts/Makefile.spl @@ -151,6 +151,8 @@ boot.bin: $(obj)/u-boot-spl.bin ALL-y += $(obj)/$(SPL_BIN).bin $(obj)/$(SPL_BIN).cfg +ALL-$(CONFIG_OF_SEPARATE) += $(obj)/$(SPL_BIN)-pad.bin $(obj)/$(SPL_BIN)-dtb.bin + ifdef CONFIG_SAMSUNG ALL-y += $(obj)/$(BOARD)-spl.bin endif @@ -165,6 +167,32 @@ endif all: $(ALL-y) +quiet_cmd_cat = CAT $@ +cmd_cat = cat $(filter-out $(PHONY), $^) > $@ + +$(obj)/$(SPL_BIN)-dtb.bin: $(obj)/$(SPL_BIN).bin $(obj)/$(SPL_BIN)-pad.bin \ + $(obj)/$(SPL_BIN).dtb FORCE + $(call if_changed,cat) + +# Create a file that pads from the end of u-boot-spl.bin to bss_end +$(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. +quiet_cmd_fdtgrep = FDTGREP $@ + cmd_fdtgrep = $(objtree)/tools/fdtgrep -b u-boot,dm-pre-reloc -RT $< \ + -n /chosen -O dtb | \ + $(objtree)/tools/fdtgrep -r -O dtb - -o $@ \ + $(addprefix -P ,$(subst $\",,$(CONFIG_OF_SPL_REMOVE_PROPS))) + +$(obj)/$(SPL_BIN).dtb: dts/dt.dtb + $(call cmd,fdtgrep) + quiet_cmd_cpp_cfg = CFG $@ cmd_cpp_cfg = $(CPP) -Wp,-MD,$(depfile) $(cpp_flags) $(LDPPFLAGS) -ansi \ -DDO_DEPS_ONLY -D__ASSEMBLY__ -x assembler-with-cpp -P -dM -E -o $@ $< |