Merge branch '2022-10-31-vbe-implement-the-full-firmware-flow'

To quote Simon:
This series provides an implementation of VBE from TPL through to U-Boot
proper, using VBE to load the relevant firmware stages. It buils a single
image.bin file containing all the phases:

   TPL - initial phase, loads VPL using binman symbols
   VPL - main firmware phase, loads SPL using VBE parameters
   SPL - loads U-Boot proper using VBE parameters
   U-Boot - final firmware phase, where OS booting is processed

This series does not include the OS-booting phase. That will be the
subject of a future series.

The implementation is entirely handled by sandbox. It should be possible
to enable this on a real board without much effort, but that is also the
subject of a future series.

1 files changed, 84 insertions, 0 deletions

diff --git a/arch/sandbox/dts/sandbox_vpl.dtsi b/arch/sandbox/dts/sandbox_vpl.dtsi
new file mode 100644
index 0000000000..1fba537f13
--- /dev/null
+++ b/arch/sandbox/dts/sandbox_vpl.dtsi
@@ -0,0 +1,84 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Devicetree file for VPL (Verifying Program Loader)
+ */
+
+&binman {
+	u-boot-tpl-elf {
+		no-expanded;
+	};
+	u-boot-vpl-elf {
+		no-expanded;
+	};
+	fw-update {
+		type = "section";
+
+		/*
+		 * provide plenty of space for ELF files with debug info so that
+		 * gdb can be used
+		 */
+		offset = <0x400000>;
+		size = <0xdffc00>;
+
+		fit {
+			fit,external-offset = <0>;
+			description = "AP firmware";
+			images {
+				spl {
+					description = "U-Boot SPL";
+					type = "firmware";
+					phase = "spl";
+					arch = "sandbox";
+					os = "u-boot";
+					compression = "none";
+
+					hash-1 {
+						algo = "sha256";
+					};
+
+					u-boot-spl-elf {
+					};
+				};
+				u-boot {
+					description = "U-Boot";
+					type = "firmware";
+					phase = "u-boot";
+					arch = "sandbox";
+					os = "u-boot";
+					compression = "none";
+
+					hash-1 {
+						algo = "sha256";
+					};
+
+					u-boot-elf {
+					};
+				};
+			};
+
+			configurations {
+				conf-1 {
+					compatible = "sandbox";
+					description = "AP Firmware v1";
+					firmware = "spl", "u-boot";
+					signature {
+						algo = "sha1,rsa2048";
+						key-name-hint = "dev";
+						sign-images = "firmware";
+					};
+				};
+			};
+		};
+	};
+	state {
+		type = "fill";
+		size = <0x200>;
+	};
+	version {
+		type = "text";
+		text = "1.2.3";
+		size = <0x200>;
+	};
+	fdtmap {
+	};
+};