Index: arch/arm64/arm64/machdep.c
===================================================================
RCS file: /cvs/src/sys/arch/arm64/arm64/machdep.c,v
retrieving revision 1.79
diff -u -p -r1.79 machdep.c
--- arch/arm64/arm64/machdep.c	9 Jan 2023 20:32:21 -0000	1.79
+++ arch/arm64/arm64/machdep.c	14 Mar 2023 22:51:10 -0000
@@ -1041,6 +1041,22 @@ initarm(struct arm64_bootparams *abp)
 		}
 	}
 
+	/* Remove reserved memory. */
+	node = fdt_find_node("/reserved-memory");
+	if (node) {
+		for (node = fdt_child_node(node); node;
+		    node = fdt_next_node(node)) {
+			char *no_map;
+			if (fdt_node_property(node, "no-map", &no_map) < 0)
+				continue;
+			if (fdt_get_reg(node, 0, &reg))
+				continue;
+			if (reg.size == 0)
+				continue;
+			memreg_remove(&reg);
+		}
+	}
+
 	/* Remove the initial 64MB block. */
 	reg.addr = memstart;
 	reg.size = memend - memstart;
Index: arch/riscv64/riscv64/machdep.c
===================================================================
RCS file: /cvs/src/sys/arch/riscv64/riscv64/machdep.c,v
retrieving revision 1.30
diff -u -p -r1.30 machdep.c
--- arch/riscv64/riscv64/machdep.c	6 Dec 2022 00:11:23 -0000	1.30
+++ arch/riscv64/riscv64/machdep.c	14 Mar 2023 22:51:10 -0000
@@ -802,6 +802,9 @@ initriscv(struct riscv_bootparams *rbp)
 	if (node) {
 		for (node = fdt_child_node(node); node;
 		    node = fdt_next_node(node)) {
+			char *no_map;
+			if (fdt_node_property(node, "no-map", &no_map) < 0)
+				continue;
 			if (fdt_get_reg(node, 0, &reg))
 				continue;
 			if (reg.size == 0)