Djam/u-boot
1
0
Fork 0
mirror of https://github.com/u-boot/u-boot.git synced 2025-04-23 22:14:54 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

kbuild: Allow DTB overlays to built into .dtbo.S files

Browse source 
[linux commit 941214a512d8, modified for U-Boot by removing the
include of vmlinux.lds.h and replacing STRUCT_ALIGNMENT by 16.]

DTB files can be built into the kernel by converting them to assembly
files then assembling them into object files. We extend this here
for DTB overlays with the .dtso extensions.

We change the start and end delimiting tag prefix to make it clear that
this data came from overlay files.

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
This commit is contained in:
Rasmus Villemoes 2024-07-10 09:16:09 +02:00 • committed by Tom Rini
parent 3b7653db7b
commit 06518fdf24
1 changed files with 19 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

20
scripts/Makefile.lib
View file

@ -305,7 +305,7 @@ endif
DTC_FLAGS += $(DTC_FLAGS_$(basetarget))
# Generate an assembly file to wrap the output of the device tree compiler
quiet_cmd_dt_S_dtb= DTB $@
quiet_cmd_dt_S_dtb= DTBS $@
# Modified for U-Boot
cmd_dt_S_dtb= \
( \
@ -322,6 +322,24 @@ cmd_dt_S_dtb= \
$(obj)/%.dtb.S: $(obj)/%.dtb
$(call cmd,dt_S_dtb)
# Generate an assembly file to wrap the output of the device tree compiler
quiet_cmd_dt_S_dtbo= DTBOS $@
# Modified for U-Boot
cmd_dt_S_dtbo= \
{ \
echo '.section .dtb.init.rodata,"a"'; \
echo '.balign 16'; \
echo '.global __dtbo_$(subst -,_,$(*F))_begin'; \
echo '__dtbo_$(subst -,_,$(*F))_begin:'; \
echo '.incbin "$<" '; \
echo '__dtbo_$(subst -,_,$(*F))_end:'; \
echo '.global __dtbo_$(subst -,_,$(*F))_end'; \
echo '.balign 16'; \
} > $@
$(obj)/%.dtbo.S: $(obj)/%.dtbo
$(call cmd,dt_S_dtbo)
ifeq ($(CONFIG_OF_LIBFDT_OVERLAY),y)
DTC_FLAGS += -@
endif