upl: Add support for Universal Payload in SPL

Add the basic code to create a handoff structure in SPL, so it can be
passed to the next phase. For now this is not plumbed in.

Signed-off-by: Simon Glass <[email protected]>

1 files changed, 32 insertions, 0 deletions

diff --git a/boot/Kconfig b/boot/Kconfig
index e37b08bf391..60a4cddf5ec 100644
--- a/boot/Kconfig
+++ b/boot/Kconfig
@@ -750,6 +750,7 @@ config UPL
 	imply CMD_UPL
 	imply UPL_READ
 	imply UPL_WRITE
+	imply SPL_UPL if SPL
 	help
 	  Provides support for UPL payloads and handoff information. U-Boot
 	  supports generating and accepting handoff information. The mkimage
@@ -769,8 +770,39 @@ config UPL_WRITE
 	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. See SPL_UPL_OUT
+	  for how to tell U-Boot SPL to actually write it before jumping to
+	  the next phase.
+
+if SPL
+
+config SPL_UPL
+	bool "Write a UPL handoff in SPL"
+	imply SPL_UPL_OUT
+	help
+	  This tells SPL to write a UPL handoff and pass it to the next phase
+	  (e.g. to U-Boot or another program which SPL loads and runs). THis
+	  provides information to help that program run correctly and
+	  efficiently on the machine.
+
+config SPL_UPL_WRITE
+	bool  # upl - Support writing a Universal Payload handoff in SPL
+	select SPL_BLOBLIST
+	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.
 
+config SPL_UPL_OUT
+	bool "upl - Support writing a Universal Payload handoff in SPL"
+	select SPL_UPL_WRITE
+	help
+	  Provides support for encoding a UPL-format payload and passing it to
+	  the next firmware phase. This allows U-Boot SPL to function as
+	  Platform Init in the meaning of the specification.
+
+endif  # SPL
+
 endif  # UPL
 
 endif # BOOTSTD