[uboot] create uboot from github:

repo: https://github.com/u-boot/u-boot
	commit: d80bb749fab53da72c4a0e09b8c2d2aaa3103c91

Change-Id: Ie6434426e1ec15bc08bb1832798e371f3fd5fb29

u-boot-2021.10/arch/x86/lib/init_helpers.c

@@ -0,0 +1,49 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2011
+ * Graeme Russ, <graeme.russ@gmail.com>
+ */
+
+#include <common.h>
+#include <init.h>
+#include <asm/global_data.h>
+#include <linux/errno.h>
+#include <asm/mtrr.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int init_cache_f_r(void)
+{
+	bool do_mtrr = CONFIG_IS_ENABLED(X86_32BIT_INIT) ||
+		 IS_ENABLED(CONFIG_FSP_VERSION2);
+	int ret;
+
+	/*
+	 * Supported configurations:
+	 *
+	 * booting from slimbootloader - in that case the MTRRs are already set
+	 *	up
+	 * booting with FSPv1 - MTRRs are already set up
+	 * booting with FSPv2 - MTRRs must be set here
+	 * booting from coreboot - in this case there is no SPL, so we set up
+	 *	the MTRRs here
+	 * Note: if there is an SPL, then it has already set up MTRRs so we
+	 *	don't need to do that here
+	 */
+	do_mtrr &= !IS_ENABLED(CONFIG_SPL) &&
+		!IS_ENABLED(CONFIG_FSP_VERSION1) &&
+		!IS_ENABLED(CONFIG_SYS_SLIMBOOTLOADER);
+
+	if (do_mtrr) {
+		ret = mtrr_commit(false);
+		/*
+		 * If MTRR MSR is not implemented by the processor, just ignore
+		 * it
+		 */
+		if (ret && ret != -ENOSYS)
+			return ret;
+	}
+
+	/* Initialise the CPU cache(s) */
+	return init_cache();
+}