payloads/LinuxBoot: Add ARM64 support

Add support for ARCH=ARM64 and introduce CROSS_COMPILE for all architectures.

* Always compress kernel Image using xz
* Create FIT uImage containing the kernel, initramfs and DTB
* Add ARM64 defconfig for all SoCs

Change-Id: I9a0cc248283432fb2384956ca55e687d4127398c
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/25152
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>

1 files changed, 74 insertions, 0 deletions

diff --git a/payloads/external/LinuxBoot/arm64/kernel_fdt_lzma.its b/payloads/external/LinuxBoot/arm64/kernel_fdt_lzma.its
new file mode 100644
index 0000000000..50f6a2f4d8
--- /dev/null
+++ b/payloads/external/LinuxBoot/arm64/kernel_fdt_lzma.its
@@ -0,0 +1,74 @@
+/*
+ * Simple U-Boot uImage source file containing a single kernel and FDT blob
+ */
+
+/dts-v1/;
+
+/ {
+	description = "Simple image with single Linux kernel and FDT blob";
+	#address-cells = <1>;
+
+	images {
+		kernel {
+			description = "Vanilla Linux kernel";
+			data = /incbin/("vmlinux.bin.lzma");
+			type = "kernel";
+			arch = "arm64";
+			os = "linux";
+			compression = "lzma";
+			load = <0x80000>;
+			entry = <0x80000>;
+			hash-1 {
+				algo = "crc32";
+			};
+			hash-2 {
+				algo = "sha1";
+			};
+			hash-3 {
+				algo = "sha256";
+			};
+		};
+		fdt-1 {
+			description = "Flattened Device Tree blob";
+			data = /incbin/("target.dtb");
+			type = "flat_dt";
+			arch = "arm64";
+			compression = "none";
+			hash-1 {
+				algo = "crc32";
+			};
+			hash-2 {
+				algo = "sha1";
+			};
+			hash-3 {
+				algo = "sha256";
+			};
+		};
+		ramdisk-1 {
+                        description = "Compressed Initramfs";
+                        data = /incbin/("initramfs.cpio.xz");
+                        type = "ramdisk";
+                        arch = "arm64";
+                        os = "linux";
+                        compression = "none";
+                        load = <00000000>;
+                        entry = <00000000>;
+                        hash-1 {
+                                algo = "sha1";
+                        };
+                        hash-2 {
+                                algo = "sha256";
+                        };
+		};
+	};
+
+	configurations {
+		default = "conf-1";
+		conf-1 {
+			description = "Boot Linux kernel with FDT blob";
+			kernel = "kernel";
+			fdt = "fdt-1";
+			ramdisk = "ramdisk-1";
+		};
+	};
+};