upl: Add support for writing a upl handoff

Universal Payload provides a standard way of handing off control between two firmware phases. Add support for writing the handoff information from a structure. Signed-off-by: Simon Glass <[email protected]>
trini · Aug 9, 2024 · 3848e97 · 3848e97
1 parent 90469da
commit 3848e97
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diff --git a/boot/Kconfig b/boot/Kconfig
@@ -748,6 +748,7 @@ config BOOTMETH_SCRIPT
 config UPL
 	bool "upl - Universal Payload Specification"
 	imply UPL_READ
+	imply UPL_WRITE
 	help
 	  Provides support for UPL payloads and handoff information. U-Boot
 	  supports generating and accepting handoff information. The mkimage
@@ -762,6 +763,13 @@ config UPL_READ
 	  which can be used elsewhere in U-Boot. This is just the reading
 	  implementation, useful for trying it out.
 
+config UPL_WRITE
+	bool "upl - Support writing a Universal Payload handoff"
+	help
+	  Provides support for encoding a UPL-format payload from a C structure
+	  so it can be passed to another program. This is just the writing
+	  implementation, useful for trying it out.
+
 endif  # UPL
 
 endif # BOOTSTD

diff --git a/boot/Makefile b/boot/Makefile
@@ -45,6 +45,7 @@ obj-$(CONFIG_$(SPL_TPL_)FDT_SIMPLEFB) += fdt_simplefb.o
 
 obj-$(CONFIG_$(SPL_TPL_)UPL) += upl_common.o
 obj-$(CONFIG_$(SPL_TPL_)UPL_READ) += upl_read.o
+obj-$(CONFIG_$(SPL_TPL_)UPL_WRITE) += upl_write.o
 
 obj-$(CONFIG_$(SPL_TPL_)OF_LIBFDT) += image-fdt.o
 obj-$(CONFIG_$(SPL_TPL_)FIT_SIGNATURE) += fdt_region.o