cpu: Add initial support for Allwinner A10 SoC

Add minimal support needed to get a bootblock capable of initialising
a serial console.

Change-Id: I50dd85544549baf9c5ea0aa3b4296972136c02a4
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/4549
Tested-by: build bot (Jenkins)
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

1 files changed, 35 insertions, 0 deletions

diff --git a/src/cpu/allwinner/a10/Makefile.inc b/src/cpu/allwinner/a10/Makefile.inc
new file mode 100644
index 0000000000..48f3110605
--- /dev/null
+++ b/src/cpu/allwinner/a10/Makefile.inc
@@ -0,0 +1,35 @@
+bootblock-y	+= pinmux.c
+bootblock-y	+= bootblock_media.c
+bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += uart.c
+bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += uart_console.c
+
+romstage-y	+= uart.c
+romstage-y	+= uart_console.c
+romstage-y	+= bootblock_media.c
+
+ramstage-y	+= uart.c
+ramstage-y	+= uart_console.c
+ramstage-y	+= timer.c
+ramstage-y	+= monotonic_timer.c
+ramstage-y	+= bootblock_media.c
+
+
+real-target: $(obj)/BOOT0
+
+get_bootblock_size= \
+	$(eval bb_s=$(shell $(CBFSTOOL) $(1) print | grep bootblocksize | \
+					sed 's/[^0-9 ]//g')) \
+	$(shell echo $$(($(word 2, $(strip $(bb_s))))))
+
+# The boot ROM in the SoC will start loading code if a special boot0 header is
+# found (at an offset of 8KiB in either NAND or SD), and the checksum is
+# correct. this header is normally added by the 'mxsunxiboot' tool. The file
+# passed to mksunxiboot should only include the bootblock due to size
+# limitations.
+# FIXME: Figure out how to safely integrate in coreboot.rom. For now, only copy
+# the first 15 KiB of coreboot.rom (This will not collide with stack)
+$(obj)/BOOT0: $(obj)/coreboot.rom
+	@printf "    BOOT0      $(subst $(obj)/,,$(^))\n"
+	touch $@
+	dd if=$^ of=$^.tmp bs=1024 count=15
+	-mksunxiboot $^.tmp $@