[PATCH 1/6] x86: Allow building an SPL image for coreboot

[Simon Glass]

Coreboot runs in 32-bit mode and cannot run a 64-bit U-Boot. To get around
this we can build a combined image with 32-bit SPL and 64-bit U-Boot. Add
a build rule and binman definition for this.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 Makefile                          |  6 ++++++
 arch/x86/cpu/coreboot/Kconfig     |  1 +
 arch/x86/dts/coreboot-u-boot.dtsi | 18 ++++++++++++++++++
 3 files changed, 25 insertions(+)
 create mode 100644 arch/x86/dts/coreboot-u-boot.dtsi

diff --git a/Makefile b/Makefile
index 0db44d42494..5249f1e9610 100644
--- a/Makefile
+++ b/Makefile
@@ -884,6 +884,9 @@ ALL-$(CONFIG_EFI_STUB) += u-boot-payload.efi
 ifneq ($(BUILD_ROM)$(CONFIG_BUILD_ROM),)
 ALL-$(CONFIG_X86_RESET_VECTOR) += u-boot.rom
 endif
+ifeq ($(CONFIG_SYS_COREBOOT)$(CONFIG_SPL),yy)
+ALL-$(CONFIG_BINMAN) += u-boot-x86-with-spl.bin
+endif
 
 # Build a combined spl + u-boot image for sunxi
 ifeq ($(CONFIG_ARCH_SUNXI)$(CONFIG_SPL),yy)
@@ -1563,6 +1566,9 @@ u-boot-sunxi-with-spl.bin: spl/sunxi-spl.bin u-boot.itb FORCE
 endif
 endif
 
+u-boot-x86-with-spl.bin: spl/u-boot-spl.bin u-boot.bin FORCE
+	$(call if_changed,binman)
+
 ifneq ($(CONFIG_TEGRA),)
 ifneq ($(CONFIG_BINMAN),)
 # Makes u-boot-dtb-tegra.bin u-boot-tegra.bin u-boot-nodtb-tegra.bin
diff --git a/arch/x86/cpu/coreboot/Kconfig b/arch/x86/cpu/coreboot/Kconfig
index c8e6a889d02..497d6284ac1 100644
--- a/arch/x86/cpu/coreboot/Kconfig
+++ b/arch/x86/cpu/coreboot/Kconfig
@@ -25,5 +25,6 @@ config SYS_COREBOOT
 	imply FS_CBFS
 	imply CBMEM_CONSOLE
 	imply X86_TSC_READ_BASE
+	select BINMAN if X86_64
 
 endif
diff --git a/arch/x86/dts/coreboot-u-boot.dtsi b/arch/x86/dts/coreboot-u-boot.dtsi
new file mode 100644
index 00000000000..38efc48d836
--- /dev/null
+++ b/arch/x86/dts/coreboot-u-boot.dtsi
@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2020 Google LLC
+ * Written by Simon Glass <sjg at chromium.org>
+ */
+
+#include <config.h>
+
+/ {
+	binman {
+		filename = "u-boot-x86-with-spl.bin";
+		u-boot-spl {
+		};
+		u-boot {
+			offset = <0x10000>;
+		};
+	};
+};
-- 
2.26.0.292.g33ef6b2f38-goog