This patch adds the groundwork for generating signed BootStream, which can be used by the HAB library in i.MX28. We are adding a new target, u-boot-signed.sb , since the process for generating regular non-signed BootStream is much easier. Moreover, the signed bootstream depends on external _proprietary_ _binary-only_ tool from Freescale called 'cst', which is available only under NDA.
To make things even uglier, the CST or HAB mandates a kind-of circular dependency. The problem is, unlike the regular IVT, which is generated by mxsimage, the IVT for signed boot must be generated by hand here due to special demands of the CST. The U-Boot binary (or SPL binary) and IVT are then signed by the CST as a one block. But here is the problem. The size of the entire image (U-Boot, IVT, CST blocks) must be appended at the end of IVT. But the size of the entire image is not known until the CST has finished signing the U-Boot and IVT. We solve this by expecting the CST block to be always 3904B (which it is in case two files, U-Boot and the hand-made IVT, are signed in the CST block).
Signed-off-by: Marek Vasut marex@denx.de Cc: Stefano Babic sbabic@denx.de --- Makefile | 2 + arch/arm/cpu/arm926ejs/mxs/Makefile | 77 ++++++++++++++++++++++++++ arch/arm/cpu/arm926ejs/mxs/mxsimage-signed.cfg | 10 ++++ 3 files changed, 89 insertions(+) create mode 100644 arch/arm/cpu/arm926ejs/mxs/mxsimage-signed.cfg
diff --git a/Makefile b/Makefile index ecac292..01d4011 100644 --- a/Makefile +++ b/Makefile @@ -856,6 +856,8 @@ OBJCOPYFLAGS_u-boot.ais = -I binary -O binary --pad-to=$(CONFIG_SPL_MAX_SIZE) u-boot.ais: spl/u-boot-spl.ais u-boot.img FORCE $(call if_changed,pad_cat)
+u-boot-signed.sb: u-boot.bin spl/u-boot-spl.bin + $(Q)$(MAKE) $(build)=arch/arm/cpu/arm926ejs/mxs $(objtree)/u-boot-signed.sb u-boot.sb: u-boot.bin spl/u-boot-spl.bin $(Q)$(MAKE) $(build)=arch/arm/cpu/arm926ejs/mxs $(objtree)/u-boot.sb
diff --git a/arch/arm/cpu/arm926ejs/mxs/Makefile b/arch/arm/cpu/arm926ejs/mxs/Makefile index 152546e..540e589 100644 --- a/arch/arm/cpu/arm926ejs/mxs/Makefile +++ b/arch/arm/cpu/arm926ejs/mxs/Makefile @@ -17,8 +17,85 @@ endif MKIMAGE_TARGET-$(CONFIG_MX23) = mx23 MKIMAGE_TARGET-$(CONFIG_MX28) = mx28
+# Convert hexadecimal value to bytes +define hex2bin +$(shell echo -n "$1" | sed 's/0x//;s/(..)(..)(..)(..)/\4\3\2\1/;s/../\\x&/g') +endef + +# Compute the post-IVT size field value for the U-Boot binary. +# The value is the result of adding the following: +# -> The size of U-Boot binary aligned to 64B (u-boot.bin) +# -> The size of IVT block aligned to 64B (u-boot.ivt) +# -> The size of U-Boot signature (u-boot.sig), 3904 B +# -> The 64B hole in front of U-Boot binary for 'struct mxs_spl_data' passing +define uboot_ivt_size +$(shell expr `stat -c "%s" $1` + 64 + 3904 + 128 | xargs printf 0x%08x) +endef + $(OBJTREE)/mxsimage.cfg: $(SRCTREE)/$(CPUDIR)/$(SOC)/mxsimage.$(MKIMAGE_TARGET-y).cfg sed "s@OBJTREE@$(OBJTREE)@g" $^ > $@
+# HAB signature is i.MX28 only +$(OBJTREE)/mxsimage-signed.cfg: $(SRCTREE)/$(CPUDIR)/$(SOC)/mxsimage-signed.cfg + sed "s@OBJTREE@$(OBJTREE)@g" $^ > $@ + +$(OBJTREE)/spl/u-boot-spl.ivt: $(OBJTREE)/spl/u-boot-spl.bin + # Align U-Boot SPL binary to 64B + dd if=$^ of=$@ ibs=64 conv=sync 2>/dev/null + mv $@ $^ + # Assemble IVT, append size field and align it to 64B. + (echo -ne "$(call hex2bin,0x402000d1)" ; \ + echo -ne "$(call hex2bin,$(CONFIG_SPL_TEXT_BASE))" ; \ + echo -ne "$(call hex2bin,0x00000000)" ; \ + echo -ne "$(call hex2bin,0x00000000)" ; \ + echo -ne "$(call hex2bin,0x00000000)" ; \ + echo -ne "$(call hex2bin,0x00008000)" ; \ + echo -ne "$(call hex2bin,0x00008040)" ; \ + echo -ne "$(call hex2bin,0x00000000)" ; \ + echo -ne "$(call hex2bin,$(call uboot_ivt_size,$^))" \ + ) | dd of=$@ ibs=64 count=1 conv=sync 2>/dev/null + +$(OBJTREE)/u-boot.ivt: $(OBJTREE)/u-boot.bin + # Align U-Boot binary to 64B + dd if=$^ of=$@ ibs=64 conv=sync 2>/dev/null + mv $@ $^ + # Assemble IVT, append size field and align it to 64B. + (echo -ne "$(call hex2bin,0x402000d1)" ; \ + echo -ne "$(call hex2bin,$(CONFIG_SYS_TEXT_BASE))" ; \ + echo -ne "$(call hex2bin,0x00000000)" ; \ + echo -ne "$(call hex2bin,0x00000000)" ; \ + echo -ne "$(call hex2bin,0x00000000)" ; \ + echo -ne "$(call hex2bin,0x40001000)" ; \ + echo -ne "$(call hex2bin,0x40001040)" ; \ + echo -ne "$(call hex2bin,0x00000000)" ; \ + echo -ne "$(call hex2bin,$(call uboot_ivt_size,$^))" \ + ) | dd of=$@ ibs=64 count=1 conv=sync 2>/dev/null + +$(OBJTREE)/spl/u-boot-spl.csf: $(OBJTREE)/spl/u-boot-spl.ivt $(OBJTREE)/spl/u-boot-spl.bin $(TOPDIR)/board/$(VENDOR)/$(BOARD)/sign/u-boot-spl.csf + # Assemble the CSF file + sed "s@TOPDIR@$(TOPDIR)@g;s@VENDOR@$(VENDOR)@g;s@BOARD@$(BOARD)@g" \ + $(word 3,$^) > $@ + sed -i "/^##Blocks.*/ d" $@ + echo " Blocks = $(CONFIG_SPL_TEXT_BASE) 0x0 " \ + "`stat -c '%s' $(word 2,$^)` "$(word 2,$^)" , \" \ + >> $@ + echo " 0x8000 0x0 0x40 "$(word 1,$^)"" >> $@ + +$(OBJTREE)/u-boot.csf: $(OBJTREE)/u-boot.ivt $(OBJTREE)/u-boot.bin $(TOPDIR)/board/$(VENDOR)/$(BOARD)/sign/u-boot.csf + # Assemble the CSF file + sed "s@TOPDIR@$(TOPDIR)@g;s@VENDOR@$(VENDOR)@g;s@BOARD@$(BOARD)@g" \ + $(word 3,$^) > $@ + sed -i "/^##Blocks.*/ d" $@ + echo " Blocks = $(CONFIG_SYS_TEXT_BASE) 0x0 " \ + "`stat -c '%s' $(word 2,$^)` "$(word 2,$^)" , \" \ + >> $@ + echo " 0x40001000 0x0 0x40 "$(word 1,$^)"" >> $@ + +%.sig: %.csf + cst -o $@ < $^ + +$(OBJTREE)/u-boot-signed.sb: $(OBJTREE)/u-boot.ivt $(OBJTREE)/u-boot.sig $(OBJTREE)/spl/u-boot-spl.ivt $(OBJTREE)/spl/u-boot-spl.sig $(OBJTREE)/mxsimage-signed.cfg + $(OBJTREE)/tools/mkimage -n $(OBJTREE)/mxsimage-signed.cfg -T mxsimage $@ + $(OBJTREE)/u-boot.sb: $(OBJTREE)/u-boot.bin $(OBJTREE)/spl/u-boot-spl.bin $(OBJTREE)/mxsimage.cfg $(OBJTREE)/tools/mkimage -n $(OBJTREE)/mxsimage.cfg -T mxsimage $@ diff --git a/arch/arm/cpu/arm926ejs/mxs/mxsimage-signed.cfg b/arch/arm/cpu/arm926ejs/mxs/mxsimage-signed.cfg new file mode 100644 index 0000000..903b6b2 --- /dev/null +++ b/arch/arm/cpu/arm926ejs/mxs/mxsimage-signed.cfg @@ -0,0 +1,10 @@ +SECTION 0x0 BOOTABLE + TAG LAST + LOAD 0x1000 OBJTREE/spl/u-boot-spl.bin + LOAD 0x8000 OBJTREE/spl/u-boot-spl.ivt + LOAD 0x8040 OBJTREE/spl/u-boot-spl.sig + CALL HAB 0x8000 0x0 + LOAD 0x40002000 OBJTREE/u-boot.bin + LOAD 0x40001000 OBJTREE/u-boot.ivt + LOAD 0x40001040 OBJTREE/u-boot.sig + CALL HAB 0x40001000 0x0