Some boards like to do their SDRAM setup in code rather than in hardcoded DCD tables. For these boards the bootloader has to be loaded to the internal SRAM which is often too small for a full featured barebox. This new SRAM image type target allows to overcome this limitation. The image created with the new imx-sram-img rule is a regular imx-image with the difference that the load size only spans the pblx image and not the whole image including the payload. The pbl image easily fits into SRAM. The strategy is that this initial code initializes the SDRAM, loads the whole image to SDRAM and jumps to it. Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> --- images/Makefile.imx | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/images/Makefile.imx b/images/Makefile.imx index 6b44958..cdbae8c 100644 --- a/images/Makefile.imx +++ b/images/Makefile.imx @@ -14,6 +14,17 @@ $(obj)/%.imximg: $(obj)/% FORCE $(call if_changed,imx_image) endif +quiet_cmd_imx_sram_img ?= IMX-SRAM-IMG $@ + cmd_imx_sram_img ?= cat $(obj)/$(patsubst %.imx-sram-img,%.pblb,$(2)) > $@; \ + $(call size_append, $(obj)/barebox.z) >> $@; \ + $(CPP) $(imxcfg_cpp_flags) -o $(imximg-tmp) $(CFG_$(@F)) ; \ + $(objtree)/scripts/imx/imx-image -o $@ -b -c $(imximg-tmp) -f $@; \ + cat $(obj)/barebox.z >> $@; \ + $(objtree)/scripts/fix_size -f $@ + +$(obj)/%.imx-sram-img: $(obj)/%.pblb $(obj)/barebox.z FORCE + $(call if_changed,imx_sram_img,$(@F)) + # ----------------------- i.MX25 based boards --------------------------- pblx-$(CONFIG_MACH_TX25) += start_imx25_karo_tx25 FILE_barebox-karo-tx25.img = start_imx25_karo_tx25.pblx -- 2.1.4 _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
