[PATCH v4 4/4] sunxi: Support building a SPL as a TOC0 image

Samuel Holland
2021-10-20T02:45:47Z

Now that mkimage can generate TOC0 images, and the SPL can interpret
them, hook up the build infrastructure so the user can choose which
image type to build. Since the absolute load address is stored in the
TOC0 header, that information must be passed to mkimage.

Signed-off-by: Samuel Holland <samuel@sholland.org>
---

(no changes since v2)

Changes in v2:
- Rebase on top of Icenowy's RISC-V support series
- Rename Kconfig symbols to include the full image type name

arch/arm/mach-sunxi/Kconfig | 2 ++
board/sunxi/Kconfig | 24 ++++++++++++++++++++++++
scripts/Makefile.spl | 5 ++++-
3 files changed, 30 insertions(+), 1 deletion(-)
create mode 100644 board/sunxi/Kconfig

diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig
index 2c18cf02d1..879efb9f61 100644
--- a/arch/arm/mach-sunxi/Kconfig
+++ b/arch/arm/mach-sunxi/Kconfig
@@ -1050,6 +1050,8 @@ config BLUETOOTH_DT_DEVICE_FIXUP
The used address is "bdaddr" if set, and "ethaddr" with the LSB
flipped elsewise.

+source "board/sunxi/Kconfig"
+
endif

config CHIP_DIP_SCAN
diff --git a/board/sunxi/Kconfig b/board/sunxi/Kconfig
new file mode 100644
index 0000000000..084a8b0c6c
--- /dev/null
+++ b/board/sunxi/Kconfig
@@ -0,0 +1,24 @@
+choice
+ prompt "SPL Image Type"
+ default SPL_IMAGE_TYPE_SUNXI_EGON
+
+config SPL_IMAGE_TYPE_SUNXI_EGON
+ bool "eGON (normal)"
+ help
+ Select this option to embed the SPL binary in an eGON.BT0 image,
+ which is compatible with the normal boot ROM (NBROM).
+
+ This is usually the correct option to choose.
+
+config SPL_IMAGE_TYPE_SUNXI_TOC0
+ bool "TOC0 (secure)"
+ help
+ Select this option to embed the SPL binary in a TOC0 image,
+ which is compatible with the secure boot ROM (SBROM).
+
+endchoice
+
+config SPL_IMAGE_TYPE
+ string
+ default "sunxi_egon" if SPL_IMAGE_TYPE_SUNXI_EGON
+ default "sunxi_toc0" if SPL_IMAGE_TYPE_SUNXI_TOC0
diff --git a/scripts/Makefile.spl b/scripts/Makefile.spl
index 4cc23799db..635fa14cb9 100644
--- a/scripts/Makefile.spl
+++ b/scripts/Makefile.spl
@@ -411,7 +411,10 @@ endif
$(obj)/$(SPL_BIN).sfp: $(obj)/$(SPL_BIN).bin FORCE
$(call if_changed,mkimage)

-MKIMAGEFLAGS_sunxi-spl.bin = -A $(ARCH) -T sunxi_egon \
+MKIMAGEFLAGS_sunxi-spl.bin = \
+ -A $(ARCH) \
+ -T $(CONFIG_SPL_IMAGE_TYPE) \
+ -a $(CONFIG_SPL_TEXT_BASE) \
-n $(CONFIG_DEFAULT_DEVICE_TREE)

OBJCOPYFLAGS_u-boot-spl-dtb.hex := -I binary -O ihex --change-address=$(CONFIG_SPL_TEXT_BASE)
--
2.32.0