diff --git a/arch/arm/cpu/armv8/fsl-layerscape/soc.c b/arch/arm/cpu/armv8/fsl-layerscape/soc.c
index 41f3e95..9820d32 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/soc.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/soc.c
@@ -54,7 +54,8 @@
 
 	lpi_base.start = addr;
 	lpi_base.end = addr + size - 1;
-	ret = fdtdec_add_reserved_memory(blob, "lpi_rd_table", &lpi_base, NULL, false);
+	ret = fdtdec_add_reserved_memory(blob, "lpi_rd_table", &lpi_base, NULL,
+					 0, NULL, 0);
 	if (ret) {
 		debug("%s: failed to add reserved memory\n", __func__);
 		return ret;
diff --git a/arch/arm/include/asm/arch-tegra/board.h b/arch/arm/include/asm/arch-tegra/board.h
index 24d0db8..cd4d0ee 100644
--- a/arch/arm/include/asm/arch-tegra/board.h
+++ b/arch/arm/include/asm/arch-tegra/board.h
@@ -30,4 +30,14 @@
 void pin_mux_mmc(void);      /* overridable mmc pinmux setup     */
 void pin_mux_display(void);  /* overridable DISPLAY pinmux setup */
 
+/*
+ * Helpers for various standard DT update mechanisms.
+ */
+
+#if defined(CONFIG_ARM64)
+void ft_mac_address_setup(void *fdt);
+void ft_carveout_setup(void *fdt, const char *const *nodes,
+		       unsigned int count);
+#endif
+
 #endif
diff --git a/arch/arm/mach-tegra/dt-setup.c b/arch/arm/mach-tegra/dt-setup.c
index 602b20e..c114947 100644
--- a/arch/arm/mach-tegra/dt-setup.c
+++ b/arch/arm/mach-tegra/dt-setup.c
@@ -4,6 +4,9 @@
  */
 
 #include <common.h>
+#include <fdtdec.h>
+#include <stdlib.h>
+#include <asm/arch-tegra/cboot.h>
 #include <asm/arch-tegra/gpu.h>
 
 /*
@@ -31,3 +34,147 @@
 
 	return 0;
 }
+
+#if defined(CONFIG_ARM64)
+void ft_mac_address_setup(void *fdt)
+{
+	const void *cboot_fdt = (const void *)cboot_boot_x0;
+	uint8_t mac[ETH_ALEN], local_mac[ETH_ALEN];
+	const char *path;
+	int offset, err;
+
+	err = cboot_get_ethaddr(cboot_fdt, local_mac);
+	if (err < 0)
+		memset(local_mac, 0, ETH_ALEN);
+
+	path = fdt_get_alias(fdt, "ethernet");
+	if (!path)
+		return;
+
+	debug("ethernet alias found: %s\n", path);
+
+	offset = fdt_path_offset(fdt, path);
+	if (offset < 0) {
+		printf("ethernet alias points to absent node %s\n", path);
+		return;
+	}
+
+	if (is_valid_ethaddr(local_mac)) {
+		err = fdt_setprop(fdt, offset, "local-mac-address", local_mac,
+				  ETH_ALEN);
+		if (!err)
+			debug("Local MAC address set: %pM\n", local_mac);
+	}
+
+	if (eth_env_get_enetaddr("ethaddr", mac)) {
+		if (memcmp(local_mac, mac, ETH_ALEN) != 0) {
+			err = fdt_setprop(fdt, offset, "mac-address", mac,
+					  ETH_ALEN);
+			if (!err)
+				debug("MAC address set: %pM\n", mac);
+		}
+	}
+}
+
+static int ft_copy_carveout(void *dst, const void *src, const char *node)
+{
+	const char *names = "memory-region-names";
+	struct fdt_memory carveout;
+	unsigned int index = 0;
+	int err, offset, len;
+	const void *prop;
+
+	while (true) {
+		const char **compatibles = NULL;
+		unsigned int num_compatibles;
+		unsigned long flags;
+		char *copy = NULL;
+		const char *name;
+
+		err = fdtdec_get_carveout(src, node, "memory-region", index,
+					  &carveout, &name, &compatibles,
+					  &num_compatibles, &flags);
+		if (err < 0) {
+			if (err != -FDT_ERR_NOTFOUND)
+				printf("failed to get carveout for %s: %d\n",
+				       node, err);
+			else
+				break;
+
+			return err;
+		}
+
+		if (name) {
+			const char *ptr = strchr(name, '@');
+
+			if (ptr) {
+				copy = strndup(name, ptr - name);
+				name = copy;
+			}
+		} else {
+			name = "carveout";
+		}
+
+		err = fdtdec_set_carveout(dst, node, "memory-region", index,
+					  &carveout, name, compatibles,
+					  num_compatibles, flags);
+		if (err < 0) {
+			printf("failed to set carveout for %s: %d\n", node,
+			       err);
+			return err;
+		}
+
+		if (copy)
+			free(copy);
+
+		index++;
+	}
+
+	offset = fdt_path_offset(src, node);
+	if (offset < 0) {
+		debug("failed to find source offset for %s: %s\n", node,
+		      fdt_strerror(err));
+		return err;
+	}
+
+	prop = fdt_getprop(src, offset, names, &len);
+	if (prop) {
+		offset = fdt_path_offset(dst, node);
+		if (offset < 0) {
+			debug("failed to find destination offset for %s: %s\n",
+			      node, fdt_strerror(err));
+			return err;
+		}
+
+		err = fdt_setprop(dst, offset, "memory-region-names", prop,
+				  len);
+		if (err < 0) {
+			debug("failed to copy \"%s\" property: %s\n", names,
+			      fdt_strerror(err));
+			return err;
+		}
+	}
+
+	return 0;
+}
+
+void ft_carveout_setup(void *fdt, const char * const *nodes, unsigned int count)
+{
+	const void *cboot_fdt = (const void *)cboot_boot_x0;
+	unsigned int i;
+	int err;
+
+	for (i = 0; i < count; i++) {
+		printf("copying carveout for %s...\n", nodes[i]);
+
+		err = ft_copy_carveout(fdt, cboot_fdt, nodes[i]);
+		if (err < 0) {
+			if (err != -FDT_ERR_NOTFOUND)
+				printf("failed to copy carveout for %s: %d\n",
+				       nodes[i], err);
+
+			continue;
+		}
+	}
+}
+#endif
diff --git a/arch/riscv/lib/fdt_fixup.c b/arch/riscv/lib/fdt_fixup.c
index 61cf893..36c16e9 100644
--- a/arch/riscv/lib/fdt_fixup.c
+++ b/arch/riscv/lib/fdt_fixup.c
@@ -75,7 +75,7 @@
 		pmp_mem.start = addr;
 		pmp_mem.end = addr + size - 1;
 		err = fdtdec_add_reserved_memory(dst, basename, &pmp_mem,
-						 &phandle, false);
+						 NULL, 0, &phandle, 0);
 		if (err < 0 && err != -FDT_ERR_EXISTS) {
 			log_err("failed to add reserved memory: %d\n", err);
 			return err;