diff options
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/allwinner/a10/Makefile.inc | 29 |
1 files changed, 19 insertions, 10 deletions
diff --git a/src/cpu/allwinner/a10/Makefile.inc b/src/cpu/allwinner/a10/Makefile.inc index 03bc612457..1b720bf779 100644 --- a/src/cpu/allwinner/a10/Makefile.inc +++ b/src/cpu/allwinner/a10/Makefile.inc @@ -30,16 +30,25 @@ get_bootblock_size= \ sed 's/[^0-9 ]//g')) \ $(shell echo $$(($(word 2, $(strip $(bb_s)))))) +# This tool is used to prepend a header to coreboot.rom to trick the SoC into +# loading out bootblock +# +MKSUNXIBOOT:=$(objutil)/mksunxiboot +$(MKSUNXIBOOT): $(top)/util/arm_boot_tools/mksunxiboot/mksunxiboot.c + @printf " HOSTCC $(subst $(obj)/,,$(@))\n" + $(HOSTCC) $(HOSTCFLAGS) -o $@ $< + # The boot ROM in the SoC will start loading code if a special BOOT0 header is # found (at an offset of 8KiB in either NAND or SD), and the checksum is -# correct. This header is normally added by the 'mxsunxiboot' tool. The boot ROM -# will load at most 24KiB of data to SRAM, so limit the file size accordingly. -# The BOOT0 header takes 32 bytes, so limit our file to 24KiB - 32 bytes. -# FIXME: Figure out how to safely integrate in coreboot.rom. -# FIXME: The file passed to mksunxiboot should only include the bootblock due -# to size limitations. -$(obj)/BOOT0: $(obj)/coreboot.rom +# correct. This header is added by the 'mxsunxiboot' tool, which is provided +# under util/arm_boot_tools/mksunxiboot. The boot ROM will load at most 24KiB of +# data to SRAM. The BOOT0 header takes 32 bytes, so bootblock is limited to +# 24KiB - 32 bytes. +# TODO: make mksunxiboot take the bootblock size as a parameter +# TODO: print an error if bootblock is too large (maybe place ROMSTAGE at the +# exact offset needed to collide with the bootblock) +# FIXME: A10 loads 24KiB. According to Oliver other chips load a little more +# +$(obj)/BOOT0: $(obj)/coreboot.rom $(MKSUNXIBOOT) @printf " BOOT0 $(subst $(obj)/,,$(^))\n" - touch $@ - dd if=$^ of=$^.tmp bs=24544 count=1 - -mksunxiboot $^.tmp $@ + $(MKSUNXIBOOT) $(word 1, $^) $@ |