Add rules to generate dtb files from dts/dtsi files, optionally run the source files through the preprocessor. Also add a rule to generate object files to include in the barbox binary.
Signed-off-by: Sascha Hauer <[email protected]> --- include/asm-generic/barebox.lds.h | 12 ++++++++++++ scripts/Makefile.lib | 41 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 53 insertions(+) diff --git a/include/asm-generic/barebox.lds.h b/include/asm-generic/barebox.lds.h index b2bd19e..a77ef8f 100644 --- a/include/asm-generic/barebox.lds.h +++ b/include/asm-generic/barebox.lds.h @@ -1,4 +1,11 @@ +/* + * Align to a 32 byte boundary equal to the + * alignment gcc 4.5 uses for a struct + */ +#define STRUCT_ALIGNMENT 32 +#define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT) + #if defined CONFIG_ARCH_IMX25 || \ defined CONFIG_ARCH_IMX35 || \ defined CONFIG_ARCH_IMX51 || \ @@ -33,6 +40,11 @@ #define BAREBOX_MAGICVARS KEEP(*(SORT_BY_NAME(.barebox_magicvar*))) +#define BAREBOX_DTB() \ + __dtb_start = .; \ + KEEP(*(.dtb.rodata.*)); \ + __dtb_end = .; + #if defined(CONFIG_ARCH_BAREBOX_MAX_BARE_INIT_SIZE) && \ CONFIG_ARCH_BAREBOX_MAX_BARE_INIT_SIZE < CONFIG_BAREBOX_MAX_BARE_INIT_SIZE #define MAX_BARE_INIT_SIZE CONFIG_ARCH_BAREBOX_MAX_BARE_INIT_SIZE diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib index 871c44b..bbfd4cd 100644 --- a/scripts/Makefile.lib +++ b/scripts/Makefile.lib @@ -141,6 +141,11 @@ cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(__cpp_flags) ld_flags = $(LDFLAGS) $(EXTRA_LDFLAGS) +dtc_cpp_flags = -Wp,-MD,$(depfile) -nostdinc \ + -I$(srctree)/arch/$(SRCARCH)/dts \ + -I$(srctree)/arch/$(SRCARCH)/include/dts \ + -undef -D__DTS__ + # Finds the multi-part object the current object will be linked into modname-multi = $(sort $(foreach m,$(multi-used),\ $(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=)))) @@ -185,6 +190,42 @@ quiet_cmd_gzip = GZIP $@ cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \ (rm -f $@ ; false) +# DTC +# --------------------------------------------------------------------------- + +# Generate an assembly file to wrap the output of the device tree compiler +quiet_cmd_dt_S_dtb= DTB $@ +cmd_dt_S_dtb= \ +( \ + echo '\#include <asm-generic/barebox.lds.h>'; \ + echo '.section .dtb.rodata.$(subst -,_,$(*F)),"a"'; \ + echo '.balign STRUCT_ALIGNMENT'; \ + echo '.global __dtb_$(subst -,_,$(*F))_start'; \ + echo '__dtb_$(subst -,_,$(*F))_start:'; \ + echo '.incbin "$<" '; \ + echo '__dtb_$(subst -,_,$(*F))_end:'; \ + echo '.global __dtb_$(subst -,_,$(*F))_end'; \ + echo '.balign STRUCT_ALIGNMENT'; \ +) > $@ + +$(obj)/%.dtb.S: $(obj)/%.dtb + $(call cmd,dt_S_dtb) + +quiet_cmd_dtc = DTC $@ +cmd_dtc = $(objtree)/scripts/dtc/dtc -O dtb -o $@ -b 0 $(DTC_FLAGS) -d $(depfile) $< + +$(obj)/%.dtb: $(src)/%.dts FORCE + $(call if_changed_dep,dtc) + +dtc-tmp = $(subst $(comma),_,$(dot-target).dts) + +quiet_cmd_dtc_cpp = DTC+CPP $@ +cmd_dtc_cpp = $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \ + $(objtree)/scripts/dtc/dtc -O dtb -o $@ -b 0 $(DTC_FLAGS) $(dtc-tmp) + +$(obj)/%.dtb: $(src)/%.dtsp FORCE + $(call if_changed_dep,dtc_cpp) + # Bzip2 # --------------------------------------------------------------------------- -- 1.8.2.rc2 _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
