images: add Tegra20 image build rules

Allows to build persistent images for the Tegra20
line of SoCs.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

images/.gitignore

@@ -8,6 +8,8 @@
 *.kwbimg
 *.kwbuartimg
 *.socfpgaimg
+*.t20img
+*.t20img.cfg
 pbl.lds
 barebox.x
 barebox.z

images/Makefile

@@ -117,5 +117,5 @@ images: $(addprefix $(obj)/, $(image-y)) FORCE
 	@for i in $(image-y); do echo $$i; done
 
 clean-files := *.pbl *.pblb *.pblx *.map start_*.imximg *.img barebox.z start_*.kwbimg \
-	start_*.kwbuartimg *.socfpgaimg *.mlo
+	start_*.kwbuartimg *.socfpgaimg *.mlo *.t20img *.t20img.cfg
 clean-files += pbl.lds

images/Makefile.tegra

@@ -1,6 +1,14 @@
 #
 # barebox image generation Makefile for Tegra images
 #
+quiet_cmd_tegra20_image = T20IMG  $@
+      cmd_tegra20_image = echo "Version = 0x00020001;Bctcopy = 1; \
+                                Bctfile = $(BCT_$(@F)); \
+                                BootLoader = $(subst .t20img,,$@),0x00108000,0x00108000,Complete;" \
+                                > $@.cfg; \
+                          $(objtree)/scripts/tegra/cbootimage -s tegra20 $@.cfg $@
+$(obj)/%.t20img: $(obj)/% FORCE
+	$(call if_changed,tegra20_image)
 
 board = $(srctree)/arch/$(ARCH)/boards